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You’ve probably noticed that I’ve been away from the blog for a while. I’ve been a bit busy lately, but I knew you would enjoy reading other perspectives from the Tesla Motors staff.
Tesla Motors is definitely a cast of characters – passionate about our mission, strong opinions, interesting backgrounds. I have never before worked with such an amazing team. I hope you enjoyed meeting a few of them – you will meet more in later blogs.
As you know, we showed the Tesla Roadster in Yokohama’s booth at the L.A. Auto Show. We did not bring the car to the Detroit Auto Show, though several of us attended.
Alternative fueled vehicles were definitely the hot topic at both the L.A. Auto Show and the Detroit Auto Show. Every major manufacturer was bragging about their newest direction for alternative fueled vehicles, and the governors of both California and Michigan already knew all about Tesla Motors when I met them.
Lithium Ion Everywhere
Interestingly, Ford showed a “fuel cell hybrid” concept platform in Detroit. (Not really a car – just a frame with some components attached to it.) This was a typical hydrogen fuel cell layout, but with an additional Lithium ion (Li-ion) battery pack providing boost to make up for the anemic fuel cell stack. No plug-in capabilities evident on this one.
General Motors, of course, did a complete about face with their Li-ion powered concept car – more later.
Most of the other car companies showed some sort of plans for Li-ion cells in hybrid cars. I guess the word is out. I find it quite amusing to see so many car companies now embracing Li-ion batteries, when only last July most said that Li-ion was not the way to go for cars.
From Horses to Horsepower
People accused me of writing GM CEO Rick Wagoner’s speech at the opening of the L.A. Auto Show, when he explained that “at the end of the day, the transformation from mechanical automobiles to vehicles that run on electricity will be as important as the transition from horses to horsepower.” He went on to announce a very modest plug-in hybrid version of the Saturn VUE hybrid, which he said will have an electric range of something like 4 miles.
Then at the Detroit Auto Show, GM showed off a new plug-in hybrid concept car called the Volt (not to be confused with the 2005 Toyota hybrid concept car called the Volta). This car will allegedly be able to drive 40 miles on plug-in electric power and has a little turbo-charged 3-cylinder gasoline engine driving a generator that can charge its Li-ion batteries while you drive. It featured typical auto show concept-car styling and hand-built, show-car construction.
Significantly, GM has abandoned the inductive “paddle charger” of yore, instead featuring a conductive interface that allows charging from standard electrical outlets. What a great idea!
I was a little surprised by the motor on the prototype they showed. It was a permanent magnet “brushless DC” type motor, maybe 50 percent larger than our motor and rated for only 160 horsepower. (The Tesla Roadster’s motor delivers about 250 horsepower.) The reason I was surprised is that GM had a pretty good AC induction motor and matching inverter in the EV-1. (See Wally’s recent blog for a discussion of these motor types.) The GM guy at the booth explained that this is the motor used on their fuel cell vehicles. My guess is that all the bright minds behind the EV-1 don’t work at GM anymore.
I bumped into my friends Chris Paine and Bob and Chelsea Sexton at the Volt stand. I congratulated Chris on his David versus Goliath success, getting GM to come around again to electric cars. Wagoner recently conceded that “axing the EV1 electric car program and not putting the right resources into hybrids was the biggest mistake of my tenure at GM.” It is a concession I am sure had something to do with Chris’s Who Killed the Electric Car.
Chris and Chelsea were, of course, delighted with GM’s new direction. They are willing to put their full endorsement behind the Volt, should it ever become a real car. So how real is it? (Chelsea seemed a bit miffed that GM wouldn’t hire her as the Volt’s spokesperson. But, then again, GM might just have an ax to grind with her.
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Right now, the Volt is only a concept car and even its EV-ness is a little unclear. GM claims this is a flexible platform (“eFlex”), which can be set up as a plug-in hybrid car, a hydrogen fuel cell car, or even a “clean diesel” car. None the less, GM spokespeople insist that this is a high priority for GM and they intend to bring it to market as soon as the kinks in the technology are worked out – for an aggressive $30,000 price point.
GM seems to be trapped in the same thinking that hobbled so many EV ventures in the past: If they can’t see the way to make an inexpensive electric car as their first model, they can’t see the business case for EVs at all. Why don’t they think this way about the Corvette? Or the Escalade, for that matter? Elsewhere in their booth, they showed a totally tricked out truck that cost $95,000 and gets something like 8 mpg – go figure.
Specifically, GM cites the Volt’s Li-ion batteries as problematic, even while acknowledging that Li-ion is the best available formulation. They recently awarded two parallel development contracts for the Volt’s battery system: one to Cobasys (together with A123) and the other to Johnson Controls/Saft. Through the U.S. Advanced Battery Consortium (USABC, comprising GM, Ford, and Chrysler), they also recently funneled $15 million into A123.
Cobasys, you might remember, is what Ovonic became after Texaco acquired it from GM. (Ovonic was Stan Ovshinsky’s company that made the NiMH batteries for the Gen 2 EV-1.) Hmm. Johnson Controls is tight with GM, making all sorts of components for GM (and others), especially car interiors. Johnson Controls bought battery maker Saft in 2005, I think. Conspiracy theories abound.
Is GM Right?
At first blush, one would think that a plug-in hybrid with a short driving range requires less battery technology than a pure electric car with a decent driving range – the hybrid is a stepping stone to the ultimate pure-electric car. But this is the opposite of the truth. Here is why.
Consider the perspective of just one cell (of arbitrary size) within a battery pack. Such a cell is rated for a certain number of charge/discharge cycles. (For better quality cells, 2 half-charge cycles or 4 quarter-charge cycles age the cell the same – or slightly less – than 1 full-charge cycle. See my battery blog for more on this subject.)
Let’s say the cell is rated for 500 cycles. Now let’s pack enough of these into a battery pack so that the car can go 250 miles on a charge. Simple math gives us the lifetime range of this battery pack: 500 X 250 = 125,000 miles.
Okay so far… Now, let’s make a smaller, 40-mile pack. The lifetime range of this pack is only 500 X 40 = 20,000 miles! To get the same lifetime range, a Chevy Volt with a 40-mile driving range would need batteries that are roughly six times as good (3,000 cycles) as those in the Tesla Roadster. Not coincidentally, the GM spokespeople say that they will launch the Volt when they can get 3,000 to 4,000 cycles out of their battery system.
So, strange as it may seem, battery technology that is good enough for the Tesla Roadster is, in fact, not good enough for the Chevy Volt. Not even close.
Dan in the Hallway
On the way out of the show, my bud Dan Neil of the LA Times cornered me to get my unvarnished opinion of the Chevy Volt. Those of you who read Dan know that he’s been pretty positive about Tesla Motors. But he is a reporter – a pretty good reporter – and he has succeeded in the past in prying more info and opinions out of me than I wanted to let on.
Naturally, I said that I thought GM’s move validates our market, etc., etc. I also expressed some skepticism as to whether this would ever become a real car.
But I was pretty down on GM’s recent request to Congress for $500 million to fund battery development. GM is apparently pitching this as a national security issue, and, in a way, I agree.
However, the private sector, including the top-tier Silicon Valley VCs, are already pumping money into companies with promising new battery chemistries. And Tesla Motors (as well as others, I am sure) is already developing good large-format battery systems that are independent of any particular cell chemistry.
The only place I could see a national security argument that is worthy of my tax dollars is actual fabrication – a factory here in the United States that manufactures competitive commodity cells of the latest chemistry.
Battery fabrication is a bit like IC fabrication: the year-by-year improvements in capacity and quality come largely from relentless manufacturing “tweakmanship” (if I might coin a word). Look at Intel, for example. They make some of the finest silicon in the world, and do so right here in Silicon Valley. Any company that outsources its manufacturing to become a “fabless IC company” has stepped off the escalator, and will find it very difficult to get back on. Unfortunately, every single U.S. battery company stepped off the Li-ion escalator. (A123 opaquely says that “A123 operates a combination of wholly owned, state-of-the-art, tier one manufacturing plants and subcontractor facilities in China, Korea, U.S., and Taiwan.”)
Maybe an investment from Uncle Sam could create a U.S. manufacturer so that we can have a little more control of our destiny as more of our transportation moves to electric power.
We’ll see what Dan writes…
Other News
And while I was in Detroit, we opened our new Motor City engineering office in Rochester Hills, Mich., with a WhiteStar (our planned four door sports sedan) design review. We already have a dozen employees there, busily working on WhiteStar. We plan to continue hiring in Detroit, aiming for around 50 people there by the end of 2007.
I remarked in the press recently that since the big car companies there were letting quite a few good people go, it made sense for us to be there – hiring. Word got back to me that none of our new Motor City staff was laid off – it was a point of pride that they chose to leave their past jobs to come and join Tesla Motors. Either way, I know great people sometimes get laid off. We wouldn’t be hiring in Detroit otherwise. (Sometimes I can get my whole foot into my mouth.)
Our first Motor City design review was quite impressive – the team is definitely hot. I am honored that top talent believe in what we are doing enough to join us. And I am increasingly optimistic about the future of American car companies. Or at least one of them.
Posted in the categories: Company, Performance, On the road, Batteries, Vehicle Engineering, Motor












Thank You for sharing your opinion on the Volt, very informative. Congratulations on your engineering office in Michigan, and that work on White Star is progressing.
Welcome back and keep on blogging! From what I hear (and I know you have to keep a lot of this under the radar) the White Star will be kind of/sort of BMW 5ish - which sounds perfect for a $40k to $50k or so car with the performance I understand it will have. I wish I could see the design - but I will wait until you are good and ready.
GM continues to exasperate me…
Martin—I and I think all the other Teslafiles could read your and other Tesla blog entries for hours of enjoyment.
BUT–where is the Tesla Store to buy our STUFF?? Ha—you could get another 60 million in “VC” with sales of T-Shirts, Hats, “Electric”–Tesla Roadster Toys, Jackets, bumper stickers and key chains…just to name a few.
GM will get their 500,000,000.00 “VC” from their friend BIG GOVT.
Yea—as you have found out BIG OIL/CAR/GOVT all use Your/Our hard earned money to fatten themselves up, kill us as startups and competitors and keep us addicted to their petrolium/war-industrial complex produced drugs.
I’m glad to see Tesla investing in America and Americans.
I just hope that the tide is changing and Americans start to value their citizenship and divorce themselves away from the globalists/corporatists who have no country other than what the resources they can sell from/to it.
All of us look forward to your progress and can’t wait to see the 1st “100″ driving amongst us everyday.
Thanks for setting the record straight, on a whole bunch of things, including what’s happening with the office in Rochester Hills. I was sure I read eleswhere that Chevy Volts’ engine was the EV-1 inductive motor, but either I was wrong or the writer I read it from. A number of bloggers have suggested that existing batteries - particularly AltairNano’s 20,000 cycle NanoSafe battery - are already suitable for the Volt. You have suggested two reasons why this is not acceptable; one, price; two, they are not buddies like Johnson Controls or Cobasys. I suppose Saft is trying to figure out how to get around Altair’s patents.
Thanks again for another great blog.
I hope you can attract some top design talent and produce a classic iconic sports sedan that will have a design language up there with BMW, Mercedes and Porche - noting too quirky, exotic.
Extend that design language to the four door hatchback Prius, Golf, A3 class. I hope I can buy a tesla one day!
Martin’s mostly spot on. as usual. GM’s Volt sure sounds good at first glance and actual production of a car at least close to this prototype merits strong support. Even if the Volt never gets built, the support and attention is great for Tesla and all other companies advancing electrically powered vehicles. The Volt’s raw specs and general concept would be a great leap forward from what is mass produced currently. Just as Martin pointed out, I too can’t understand why GM would introduce the Volt as a Chevy. They readily acknowledge production, whenever that may occur, would start small. If GM is truly committed to producing this car, it would be a lot more sensible for the first model to be a Cadillac. Heck, even the design fits in better with Cadillac’s current models. They could build it a lot sooner fitting into a $50,000 price rather than $25,000. Also, if GM really wanted to make this car one would expect they would use commercially available technology and build around that. Even if this meant fewer electric only miles and/or fewer battery cycles. The lasting impression for me is that this was a concept car they were developing for a fuel cell vehicle and did a fairly recent switch to take advantage of the current spike of interest in electric vehicles and reducing dependence on foreign oil. Hope I’m wrong and they really are committed to building this “non-hybrid (wink, wink) range extender”.
I do disagree with Martin regarding the 40 mile pack being less valuable than a 250 mile pack. It depends on the car’s design and it’s intended purpose. Yes, the lifetime range will be significantly less but so will the price and the weight. The battery/genset concept is to use both sources. The driver it makes most sense for would still travel 10,000-20,000 miles from the generator, so the pack would be replaced 3 or 4 times to travel 120,000 miles. How much less would a 40 mile pack be? If Tesla’s philosophy (which seems logical) regarding battery development is accurate, then each subsequent pack will cost less per mile. Even if the cost doesn’t come down, I’ld rather have my money in the bank rather than in a battery pack.
Let’s see” $500M… hmmm… should we give it away in the hopes that the handful of recipients will develop a product for a market that barely exists or do we incentivize that market to grow. That could be a $5,000 tax rebate for 100,000 vehicles. Additionally, redirect $500M from hydrogen development and setup realistic electricity storage device development contests.
Doesn’t the Volt’s genset specs seem a bit overly optimistic?
Design-that’s the KEY factor for the Whitestar. Don’t ask me how to do it, but I hope it’s a stand-out, fun design with a lot of personality-and unlike anything out there (to match its technology: the best of both worlds). Apple & Starbucks both use it to enhance their product :”The (design) medium is the message”-so does Frank Gehry, though his product is the product ( ?? -at least that’s what Yogi Berra thinks). E.L. Cord would definitely agree as well. One thing’s certain, the Whitestar design will be “happening” one way or another-the roadster being the proof of that pudding. Hope it comes out at no more than $50,000 ($45,000, maybe, hopefully…cheaper batteries by then?). Guess Tesla will be looking at using Whitestar parts also in the later family sedan. Tesla needs to do a real job with the seats, for tall people like me particularly (and Martin perhaps?) -need to make seats that can raise up high, like a truck-as in Chrysler Aspen I sat in at auto show. With long legs it’s a lot more comfortable to be up high. Also need to have a bench front seat option, with big fat armrest you can fold down-like on older Durango my brother owns. That seat is very comfortable, especially for long drives . With no Tesla transmission tunnel, this should be an easy option.
Congrats on opening the new engineering office. The more Tesla does, the more excited I get about your (and our) future. I was hoping that you guys might be coming to the St. Louis Auto Show, but since you didn’t have a display in Detroit I guess that’s just a wish. I agree with Jim Wells’ sentiments; I could read this blog for hours of entertainment, I was lost for a while without the regular update. I also agree with the statement about Tesla gear. I would proudly sport a hat with the “T” shield on it. If you had gotten the apparel shop up and running some months back we could all be wearing Tesla stuff to our regional auto shows and give Tesla a “virtual” presence at every show. Not to mention the VC that would come out of it. Then maybe you could bring the price of the roadster down? Buy a t-shirt, get a roadster half-off? No?
So far Tesla Motors positioned itself as car maker company for rich people only. At least to me all the talk of Tesla Motors as future mass market cars manufacturing sounds like a marketing deception to get better publicity.
In reality I think company would service only rich enough people. Whole phylosophy of cars building I read on this site from Martin Eberhard is tailored to expensive “fun to drive” vehicles which only affluent people could afford. May be this would be what electric cars exist for, but this I think will solve nothing about U.S. oil addiction or ecology problems.
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Martin Eberhard is obviously correct in his technology observation about batteries. It surely requires better battery technology to make a plug-in hybrid car under ~$30000 like GM Volt than to make full electric roadster for ~$90000 like Tesla Roadster.
But I do not believe that cars for $50000 and above are real solution for a massive switch of U.S. transportation into renewables fuels. May be Martin Eberhard consider that cars and car buyers dealing with cars below $50000 are not important and sort of should stop driving cars completely to avoid contribute to global warming. If this is the case it would be very elitish.
But if we consider realistic conversion to electric cars for masses I believe that target price range should be $15000 - $30000. Also this should be considered to be universal car capable of driving short every day commute and long road trips for thousands of miles with no electric infrastructure to charge. Also people who rent for a long time would not have ability to change vehicles by electricity.
Having expensive battery pack Tesla Motors have today is not an option for mass transportation I believe. Battery pack targeting cost $3000 - $5000 is needed. With current battery technology used by Tesla Motors this would correspond to 40 to 60 miles electric range. Sounds pretty similar to GM Volt concept in capabilities.
It is correct that with typical 500 times recharge cycles it will not be practical because battery replacement would come too frequent. Basically battery depreciation cost of ownership of plug-in hybrid or full EV is independent on battery size and is limited by technological factors.
So without dramatic improvements at least on recharge cycle count mass transition from oil to electricity for transportation is impossible. But it is claimed by A123 and AltairNano compamies to provide big improvement on recharge cycles. If this would be proven by practical use it opens the road to have 3000 to 4000 recharge cycles. In this case for mass market GM Volt serial plug-in hybrid concept characteristics are much better on target compared to published so far Tesla Motors plans.
Would GM really push plug-in hybrids like Volt into production remains very unclear especially taking into account GM track record so far. But aside of GM behavior the GM Volt concept itself to me makes perfect sense for mass market cars $15000 - $30000 price range assuming A123 or Altairnano batteries would be really 3000 to 4000 recharge cycle count and would cost similar money to up to date Li-ion batteries.
I rescently stumbled on another electric car by Phoenix Motorcar. They are using a new LI Battery from altairnano. They claim 10 minute recharge time for a 35Kwh battery pack. I suppose you have to be next door to a power plant to get that kind of power in 10 minutes. One other claim was that they get something like 15,000 CDC Cycles!
I hope this all works out for them !
I am going to write my Congressman to complain about spending tax dollars on batery research. Let the Free Market solve the problem instead of lining the pockets of somebodys friends with our tax dollars.
Martin,
I admire Tesla’s technology and the hard work of its employees. However, I have to say, for a 2010 sports sedan, Tesla or Chevrolet, I’m happy with any car that gets either 7 or 8.5 seconds in a 0-60mph contest. I’m happy if the motor is either A/C and 90 pounds or D/C brushless and 140 pounds. What will make the difference for me is, how much will it cost? And will I have to write a check for the full amount a year in advance? Or to fight global warming, can I get financing for a useful car for a normal guy with normal kids who has a normal wife looking over my shoulder at big purchases?
As one of your own bloggers stressed recently, don’t make perfect the enemy of good.
Martin,
Keep the info coming. I also read about the Volt and just attended the San Jose Auto show where lots of poeple were it and electric cars, and plugin hybrids. Quite a few poeple there knew about Tesla and I told a few more. It surprised me though that there was not a single electric car displayed, or any plugin hybrids. Everyone was pitching something they did not have.
When I went to the SF Auto show there were four manufacturers of electric cars including Tesla, so I was expecting and hoping to see something at the SJ show. I expect next year could be interesting.
Martin, have you thought about when you want to start to allow some of the car magazines to actually road and performance test the roadster. Perhaps when the first production cars are delivered, in September? I look forward to getting a test drive in the roadster and the whitestar. I have decided that I will be buying an electric car, I just don’t know what yet. I wish the roadster was available today, I might just take the plunge.
A friend of mine just bought a brand new Lotus Elise, the roadsters little cousin and I got a chance to drive that. What a blast. I expect the roadster will feel very similar but perhaps a little more civilized, I can’t wait.
Anyway I agree with GM that developing an electric vehicle to replace all the gas burning hogs. Like you I disagree that the government needs give a multi gazillion dollar company 500 megabucks to develop this technology when you are already doing it. GM and Ford should just get off their “halibuts” and get to work on this seriously now instead of spending their developement billions on the next Hummer.
Like you I believe that if we do not convert our nationwide personal transportation fleet to battery electrically driven that is charged from a power grid fired up with renewable energy, solar, wind, tidal, and biofuels. The biofuels would be far more effective, far cleaner, and consume less land per mile travelled if they are burned in new high efficiency power plants than in the horribly inefficient internal combustion engines that GM is pushing. If president shrub want to support ethanol production for energy, it should all go to a new power plant to produce electricity and replace coal as a power source. Better yet look at using the biomass directly as a fuel instead of first producing ethanol.
Perhaps we should all begin to lobby our elected officials to get serious about energy independance and reduced emmisions, including all carbon emmisions from fossil fuels. Carbon from fast growing biofuel plants i consider to be essentially not a global warming issue since the next crop is continually removing the coarbon from the atmosphere again.
Got a little off the subject of electric cars and Tesla in particular, but in light of the above I think Tesla should be awarded a couple hundred million in gov’t dollars to bring whitestar to market as soon as possible.
Next is a small lightweight commuter car, greystar? A couple of suggestions for that, first it must be capable of freeway driving but I would say for an “entry level” car do away with the transmission, that will save some weight and hardware cost. Then go for the best friction coefficient you can, if you can drop it under .15 that would increase your range. Make it a lightweight as practical. A top speed of about 85 mph and 0 to 60 time of about 10 seconds should be adequate for the first pass. That would allow you to downsize the motor and power electronics to save more weight and extend range. Anyway I am sure the discussions have started on that so I wanted to offer my 2 cents.
Keep up the good work and you will be the future of the american auto industry.
Loek Vaneveld
This is one of the best blogs yet. I feel more optimistic the more information you guys reveal. Please keep it coming and keep up the good work.
re: GM & the (re)Volt
There’s an interview here: www.autobloggreen.com/2007/01/09/detroit-auto-show-autobloggreen-qanda-with-dave-barthmuss/ with a GM spokesman discussing the Volt. The impression I’m left with is that the Volt is a PR exercise made to give the impression that GM is doing something. A hybrid is difficult problem, there are serious challenges in bringing them to market, never mind that Honda & Toyota have already done so and Nissan is expected to do so this year. He says: “… we have to have a vehicle that’s very affordable because it’s a Chevrolet brand, Chevrolet badge that can seat many people, that can seat five or six people…”. Halibut. Great big hairy ones. Affordable? Corvette, anyone? Can seat 5 or 6? How big is the Volt again? This guy is dissembling, disceiving, distracting his audience from the real issues. How many brands does GM have? I’m sure there’s at least one that would fit a hybrid or EV if they were serious about it.
Congrats on the new office. You seemed to get it going and staffed rather quickly.
I have this thought that there is some sense of wonder and accomplishment that went on with the original roadster being done by a bunch of computer engineers breaking into the car business. Now that you have seasoned big industry car engineers working on the next gen, I wonder if things are more “business as usual” with a bit less of the experimental wild passion going on there? Hopefully your new staff hasn’t gotten too jaded from working for the established giants already.
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Martin said:
“a smaller, 40-mile pack. The lifetime range of this pack is only 500 X 40 = 20,000 miles! To get the same lifetime range, a Chevy Volt with a 40-mile driving range would need batteries that are roughly six times as good (3,000 cycles) as those in the Tesla Roadster. ”
Is that really correct? With the gas motor doesn’t the hybrid have the luxury of not running the pack down as often? For instance, the Prius has a wimpy little battery pack, yet Toyota guarantees it for something like 150,000 miles of use, and it seems they are proving to work that well in practice. They have the luxury of turning on the gas motor and saving the battery life for just the right moments when they need it. For instance, they typically keep the battery pack between something like 50 and 80% of charge, and use the gas motor to keep if from falling to a damaging level of undercharge. It seems to me the whole battery lifespan equation is a different story if you have a gas motor and generator on-board.
My wife just bought a Highlander hybrid and it is amazing (and scary) how much technology goes into making that all work. There is something beautiful about the basic simplicity of a pure EV as compared to the hybrids, but still it is sortof neat the way the gas motor can work when the batteries need help, and the electrical motor can ease burdens from the gas motor (like not having to idle, or shift gears, or work as hard when passing acceleration as needed). She needed a 6+ passenger vehicle, so waiting for Whitestar wasn’t an option.
I gather you guys didn’t show up at the SJ auto show? It is sad with a city as big as San Jose that their auto show pales compared to LA, Chicago, Detroit, NY and even SF.
One of these days the SJ auto show needs to move to the big leagues. I wonder if we could get a Tesla to be a pace car for the SJ Grand Prix?
So, do you have a date yet for when we’ll be able to put down our deposits for the White Star?
Hi Martin,
Another good blog. I live in Switzerland and I think we should have your cars as soon as possible available here. We’re having the warmest January since a long time (today app. 14degC), and this comes not only from burning X-mas trees in the backyard. I want you to have (also oeconomical) success with your cars and I hope I’ll see your car(s) at the 2008 Geneva Auto Show.
Patrik
I agree that the battery technology is not ready for the Volt. and that pure EV is a better solution and long-term superior. However, notwithstanding the cost, the Volt would meet my needs perfectly compared to an EV. Almost all of my driving is either short or long. 40 miles or 400.
However, extended cycle batteries would be the best things for EVs ever and exploit it main strength—reliability. With long life batteries, this makes a EV with a 300,000mi/15yr Warranty a possibility. This would justify longer term financing and make a $60,000 EV completive with a $30,000 gasoline car on a payment bases.
Btw, did you notice if the Volt used a AC or DC genset?
“The GM spokespeople say that they will launch the Volt when they can get 3,000 to 4,000 cycles out of their battery system.”
I won’t hold my breath.
Been reading……
www.batteryuniversity.com/parttwo-34.htm
How does the Roadster deal with the “digital memory” issue mentioned in the above link - or is this not a problem in EV applications?
Jim’s right about the stuff. I can’t afford a Roadster, but I can afford a hat and a couple of shirts. I’m willing to bet that many of your readers are classic early-adaptors who are who are very influential in their circle of friends, and that they would be thrilled to use a new cap as conversation starter on the links each weekend. BMW and other high-end companies sell lots of classy gear that reinforces their brand. We’re not talking “Keep on Truckin’” mud flaps!
Keep up the great work. You have White Star with my name on it. My kids are 2 and 4 and my goal is that they never drive a gas car in their lives – wouldn’t that be something?
Dear Martin,
Who the “halibut” drives a 4 door sedan? Maybe it is popular in the US, but in my country, Sweden, we all drive Estates, Combis or whatever you wanna call them. I hope you will make a “sports combi” also out the sedan before Volvo builds it’s first EV V70…
Is this possible you think?
/ The Swedish Tesla Fan
Martin,
You and the team at Tesla truly epitomize what American products and marketing should be: delivery of a technological wonder plus accurate and lots of information relayed straight to Joe Blow off the street.
I think the world is watching partly because of your interaction with the public, busy as we know you are. I check your site daily and look forward to being able to purchase. Please keep it up, and do not fall victim to the practices of the once, Big Three.
Another good blog. I was looking at the BMW Series 1 four door hatchback & couldn’t help but think THAT’S what the White Star should be. Soccer moms need to get out of their SUVs and I see the market forces moving towards cross-over/hatchback/sport wagons. That extra load space would be handy.
So, has the timetable on the White Star changed at all? Still on target? What is the target, actually? 2009?
Thanks!
Kevmo
Moderator — looks like my < whacked my comment — is this any better?
I think what you’ve managed to demonstrate is that the batteries you are using are inappropriate for a hybrid vehicle.
That much seems obvious — there are tradeoffs in energy and power density between technologies. A123 or Altair have something like half the cell energy density, but much better cycle life (thousands, not 500), and much better power delivery (which you’d need when downsizing the pack). Pricing is an issue, of course.
EEStor just did a press announcement as well, so, there are about to be more power sources than just cells (15kwh, less than 100 pounds, deliverable 2007).
www.marketwire.com/mw/release_html_b1?release_id=204515
Martin Eberhard said, “Not coincidentally, the GM spokespeople say that they will launch the Volt when they can get 3,000 to 4,000 cycles out of their battery system.”
And of course, at that time, Tesla’s commensurate battery pack will last for between 750,000 and 1,000,000 miles. Or at least 25 years of heavy driving (25,000/year).
Perhaps the engineers will then be able to increase the capacity of the battery pack so that a less-expensive, sedan-class car will travel 300 miles, fully loaded. Under those conditions, I personally could expect to own a Whitestar-like car for more than 30 years before having to replace the battery.
Should the above scenario come to pass, it is hard for me to imagine how a hybrid or fuel-cell car could possibly seem more attractive than a full-electric, which would count high performance, no emissions, lower maintenance and repair costs, and the ability to “fill up” anywhere, from wall socket, among its advantages. I guess we’ll see, unless Big Auto has an epiphany between now and then, and decides to more aggressively pursue the full-electric option.
Are you aware of the major advances in auto air conditioning using the CO2 trans critical cycle? It operates as a heat pump and can provide instant heat when starting.
Lots to tell you guys about this if you don’t already know.
Thanks,
Butch LaFonte
The LaFonte Group
Birmingham, Alabama
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Editor’s comment: Thanks for the update. Check out the blog, Blowing Hot and Cold, for info on instant heat it in the Tesla Roadster.
Dear Martin,
I strongly recommend having a trusted California security firm monitoring your future Motor City R&D facility and screening your new Detroit-based employees. One can’t be too careful when one is under the watchful eye of your large deep-pocketed omnipresent competitors.
Personally, the GM Volt sounds like a DOA designed vehicle. Sort of designed along lines of the GM hairbrained fuelcell vehicle (platinum costs and hydrocarbon reliance are the non-starters for this vehicle). If GM were serious about its future, it would emulate Tesla Motors and come out with its own “Electric Cadillac.” All them old geezers would jump on the chance to buy a new “Electric Cadillac” and they would get pre-orders in the order of 20,000 customers compared to Tesla’s 1,000 customers.
Your approach to Li Ion battery disruptive technology is classic and I’m sure the Harvard Business School would say that your approach is the low risk approach to successfully producing electric cars. Why else would CA Governor Schwarzenegger and MI Governor Grenholm take such an interest in Tesla Motors? It isn’t because of Elon Musk being the Chairman of the company. Otherwise, Schwarzenegger and Grenholm would be wooing Mr. Musk to get business from SpaceX, as well, for their respective States:
www.spacex.com/index.html?section=aboutus&content=http%3A//www.spacex.com/profiles.php
Great blog!
> And of course, at that time, Tesla’s commensurate battery pack will last for between 750,000 and 1,000,000 miles. Or at least 25 years of heavy driving (25,000/year).
Of course they will probably improve power density as well.
So basically it appears that before GM can produce the VOLT Tesla should be able to put a car in production with a 500+ mile range ( good enough for 90% of the population) as well as enough lifespan to keep people very happy for many years.
Tesla will need to have amazing upgradable computer hardware and software in these cars to handle future advancements and make sure to have a revenue stream after they have displaced all other manufacturers cars, leaving them little to produce except to handle attrition
Of course all wreck cars should be completely recycled at that point
I’m an entertainment producer here in the Detroit Metro area.
I would drop everything to come to work at your groundbreaking
company . I now wish I had become an engineer.
The sky is the limit for you. You should be proud.
If I could help in anyway let me know. If not, know that I’ll be out here
supporting you in my own little way.
Jim Oliver
Jack Greiner Productions
If you can release it, I’d love to hear more about what Tesla will look like in 5-10 years. When you start selling mass market, the 2nd and 3rd models, will you partner with any financial institutions to offer financing? How many “tesla centers” can we expect? How will the business model change? And for pete’s sake, when can I buy a hat?
Although, I belong to a world that refuse to embrace technology with any seriousness, nevertheless I can foresee a future where our atmosphere would be free from the life-destroying, noxious gases; the big oil boys makes money from.
What you guys are doing is not just great, it is freedom from not just from pollution but also from oppression.
I’d have loved to contribute my own quota in creating a pollution-free-world, but my experience and my part of the world is a set back; and even at that i’d in my own little way always promote Tesla.
Please, do no relent on your effort and do not get intimidated, your work at Tesla is too great for such. You’ve already had success, keep expanding it.
Another vote for Tesla-branded hats, shirts, mugs, etc. Let’s work the math. If you sold 220 Roadsters @ $100k each, that grosses $22 million. As you say, the point of selling the cars is entirely to provide cashflow for additional development.
Now, if you can provide Tesla gear, you could probably net AT LEAST $10 per reader here (there must be at least several thousand, I should think). Not an insignificant number by itself, but it also lets you identify a cadre of consumers who have already bought into your concept and have become enthusiastic advocates for it. This will be invaluable for market projections, marketing drives, etc.
People need a way to demonstrate commitment in order to stay committed. You guys seriously need to provide swag!
As I have written before, I was a big fan of A123 system lithium batteries because of the high power density (3000 W/kg), relatively high number of deep charge/discharge cycles (over 2000 cycles at 1 C) and an OK energy density of 110 W*hr/Kg but an extremely high price (this people are charging $170 for a single DeWalt drill battery at Home Depot. Then along came ALTAIR nano: even higher power density (4000 W/Kg), extremely high number of charge/discharge cycles (over 15,000 cycles, not a typo), mediocre energy density (90 W*hr/kg) and there are reports they are charging $70,000 for a 35 KW*hr battery pack. Both companies have products that would greatly improve the electric drivetrains of any car in the market (including the Tesla roadster!) but in their arrogance, they are pricing themselves out of the electric/hybrid car market.
Electrovaya just came out with a battery with 330 W*hr/Kg. No info on the number of deep charge/discharge cycles, power density or price of W*hr/kg (in short, not worth writing more than 3 lines on this blog)
EEstor claims that will release a 52 KW*hr capacitor pack that weighs a mere 152 Kg! that is 342 W*hr/kg. They claim that the pack can be charged in as little as 4 minutes, which means that it can take in 5132 Watts of energy per kg. There is no info about the actual power density but for a “Hyper capacitor” of such energy density, the power density has to be astronomical. Now the icing on the cake: they say their price will be 1/4 to 1/8 the price of lithium batteries. They also claim that their capacitor will be on the market sometime in 2007.
Bottomline: If this “Hyper capacitor” is not a hoax, good bye lithium, hello EEStor.
1) Yes, definitely sell t-shirts, coffee mugs, etc.
2)To the Europeans: Hahahaha! To bad, they’re not coming there soon…
3)I agree that a small lower-performance city car is the logical 3rd model. But I think you always have to get a triple-digit top speed to get any respect at all. Shouldn’t be tough to get it to 105, right?
4)On the Volt: Some people have said you missed the whole hybrid concept, that the engine could “help out.” This is not my read of things…I understood this model to be functionally different from other hybrids, in that it used a fully-electric drive. That is, the gas engine only functioned as a generator, and did not have a mechanical connection to the transmission. Am I right, or are your detractors? Either way, hybrids seem to take all the complexity of both systems, and as such I feel they blunt the advantages of the electric technology they bring to the table.
5)I’d love to hear your opinion of the recent battery developments and those that you think will be forthcoming. Not only the altair stuff, but also Li-polymer and Chromium-based cells, etc. Or I guess more specifically, do you figure energy density will be much better by the time you’re building Whitestar? Surely by then you won’t be using the same cells you’re using now, right?
Thanks
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Editor’s response: Martin’s blog, Balance, addressed some alternate technologies.
I agree with Olof, I don’t really like 4 door sedans either. Some Mercedes look nice-for sedans. I think the emphasis should be big on “sports” in “sports sedan”- like hatchback & suicide doors: a sports car that happens to be a sedan. Have option to seat 6 instead of 5. Loek & the rest of us could lobby the govt. for environ. changes, or totally clean house (as much as possible) by drafting Gore.
I definitely agree with the merchandise, though I think you should have had it by december 1, so that people could give it as christmas presents. And if you laugh at that, honestly, how many shirts and other clothes have you gotten for christmas? Way too much? Yeah, me too. This stuff would be in the lonely category of “would actually wear.”
Also, they’ve been workin on the sedan for a while now. They’ve been saying “4-door” for a while. If they’ve locked that in, it’s probably not going to change at this point, though I would be surprised if they didn’t make a 2-door version at some point in the future. Just, not car number 2, since they already have one 2-door car, may as well go in a different direction, right?
Last question: How many service centers to you expect to be adding per year? I know where they’re going to start out, just wondering if you have the slightest clue on when (even if the “where” is undecided) they well start sprouting up?
I think a sedan is fine, but then, I have a family.
But an RX-8 style dual-suicide door would be, err, “hawt”.
You guys should do what you want, of course. My only concern with the move to Michigan is that all the car styling is going to look -dull-/-same-as-every-other-car.
What I’ve noticed is that Detroit makes many nice-looking concepts and ships none of them. I thought the Precept was a pretty cool looking car, for example. I suppose I will make myself unpopular by saying I think the Volt is dead-ugly. I suppose I should consider the possibility that GM might be serious this time because of that.
But it’s all opinion. Alas that you can’t make a five passenger sedan look like a Murcielago ;^/
bol,
-Dave
Just off the EESTOR shelf:
www.greencarcongress.com/2007/01/eestor_announce.html
“The resulting parallel configuration of components has the capability to store electrical energy in the range of 52 kWh, according to the document, with weight for a unit of that capacity in the range of 336 pounds (152 kg). ”
Lets hope this is true……..Tesla go hunt them down for some Engineering Samples you can try out.
Check this out everyone. Just figured I’d post this for anyone who follows global warming. Thanks guys for posting about EEstor. They seem on target. And Martin made an interesting point in reguards to battery life and pack size. Nice! Heres the link. Watch the video also.
www.msnbc.msn.com/id/16593606/
To TEG:
1. GM Volt concept is a serial hybrid. In this case almost all the energy used for driving have to go through the battery. This is probably biggest drawback of serial hybrid prevented it from entering the market so far.
2. Toyota and Honda hybrids are variations of parallel hybrid. In this case most of sustained energy for driving goes directly from ICE to wheels via transmission. As a result battery life and associated cost is saved dramatically. The drawback of this scheme is mechanical complexity. Apparently Japanese car companies have big mechanical reliability edge versus GM and Ford. As a result GM and Ford have to resort to serial hybrid but need better batteries than available today to do so practically.
Hunter wrote:
## 4)On the Volt: Some people have said you missed the whole hybrid concept, that the engine could “help out.” This is not my read of things…I understood this model to be functionally different from other hybrids, in that it used a fully-electric drive. That is, the gas engine only functioned as a generator, and did not have a mechanical connection to the transmission.
Even if there is no mechanical connection from the gas engine to the drive wheels the gas engine could still generate power to turn the traction motor directly and save the batteries from having to discharge. It all depends on how they program the controllers. If they wanted to maximize pure electric range so that it runs off of batteries entirely until they are depleted, then yes it would be cycling them a lot. On the other hand if it uses the batteries for starting and low speed operation (like a typical hybrid) and turned on the gas motor during regular “cruising” then the batteries wouldn’t need to be cycled so much.
Have to respectfully disagree with Olof, and T.J. Marketing a 4-door sedan provides a huge market. Sports Sedan or not, a 4-door, preferably with a trunk (not a hatchback), will be popular. According to NADAguides.com, analysis based on shopper’s research 4-door sedans were the most visited category in Q2/2006. This translated into almost 1/3 of the traffic to that section of the site. The information was then cross referenced with auto industry statistics, which showed a correlation between consumer research and actual sales.
Olof, I currently drive a Volvo 4-door sedan
To TEG:
1. GM Volt is a PLUG-IN hybrid. This means they expect from a use model to drive on electricity alone significant fraction of the total distance. This has to require proportionally high fraction of total energy to go through battery pack creating battery depreciation cost issue. This is not the case for just hybrids of Toyota. Probably this also explains Toyota reluctance to convert Prius to plug-in hybrid mode.
2. Local driving power fluctuates at relatively high frequency. If you make tight feddback loop between generator and electrical motor to minimize battery energy flux you end up driving a ICE based car with sort of energy inefficient electrical transmission versus more efficient good old mechanical transmission. In such a case the only gain is regenerative braking but you have a sure loss of energy in transmission. This scheme is possible but it is not very attractive I guess.
It is much more attractive to have not tightly coupled generator and driving power. In this case you could make generator working at significantly higher efficiensy because you will always have it working at best efficiensy (fixed power) spot or have it shut off. Such a generator even based on ICE could by itself cross the gap from 30 mpg to 50 mpg without taking into account regenarative braking. With regenerative braking etc you could have Prius class car with 70 - 80 mpg efficiensy in such a serial hybrid approach evn without plug-in hybrid mode.
But the key enabling feature here is that battery could have 4 - 6 times higher recharge cycle count versus today Li-ion for comparable cost per unit of energy storage. Having high energy density like Li-ion batteries would not be critical because battery pack energy capacity could be reduced to 5 - 10 kWh. But high power density would be needed. A123 and Altairnano batteries are both targeting much higher recharge cycle count and power density at the cost of lower energy density compared to modern Li-ion. So for serial hybrid cars targeting less than $30000 price range these batteries could enable efficient serial hybrids in a sense I explained.
Martin et al…
Nice article, the explanation of battery-readiness for the Volt was much appreciated.
Any thoughts on the EEStor press release claiming a successful production operation for a 15kWh ultracap found at www.marketwire.com/mw/release_html_b1?release_id=204515 ? Could this potentially validate their claims, or do you think it’s some lip service for the VCs?
Another comment on EEStor:
Unfortunately they never made and will never make the supercapacitor described in the patent, because they ignore a well known physical effect, called “dielectric saturation”.
Barium titanate has been used in capacitors for decades, due to its high dielectric constant:
www.avxcorp.com/docs/techinfo/mlcmat.pdf
However, the dielectric constant drops as the electric field strength increases:
Phys. Rev. 1947
At a hypothetical field of 3500 Volts over a thickness of 12.76 micrometers, as proposed in the patent, the dielectric constant of barium titanate would be orders of magnitude lower than the claimed 18500, reducing capacity and energy density by the same factor…
This has been discussed in more detail by Anatoly Moskalev on December 24th, 2006 in Tesla Motors Blog
On the VOLT: My impression is that GM has produced a car that will be a platform for exploring the realm of series hybrids. My thought was that if the VOLT gets 50 MPG when the batteries are depleted, then why not just run the car with the ICE running all the time, sans battery? Of course you’d need some energy storage for needed surge power, under acceleration. 50 mpg is alot better mileage than any other GM vehicle. GM could even leave the battery connections and bracketing so that purchasers could have the option of adding the amount of pure electrical range they want, 10, 20, , 30, or 40 miles depending on their budget and needs. The VOLT just seems well designed for modular upgrades. I think big dum GM is smarter than we think.
Just think about the aftermarket implications. Higher output electric motors, rotary ICE’s for more power and less weight, higher output generators, modular battery range extenders to put in the trunk, etc, etc… The VOLT could be set up for high performance or high efficiency, and possibly, swap back and forth with a simply change in computer programing. With the VOLT, I’d pay less attention to the component technology and focus more on the total platform, we will see it again.
I agree that Tesla’s plan with the WhiteStar is right on. The only part I have any reservations about is the manufacturing side, how much is going to be out sourced? It sounds like a built by Tesla but I can’t see that a full production line could be built and functioning in just 2 years. I think Tesla’s production line will be as minimal as possible with major parts comming from established manufacturers. But that’s pure speculation.
I think EEStor is a winner and worthy of serious consideration by Tesla, but it is not the only solution, see other possibilities at www.plasticlabels.ca/index_files/compareEVbatteries.htm Problems to solve include how to make regenerative braking produce 3500 volts to recharge the capacitor.
This company is great and will revolutionize the world.Iwould like to know where to buy stock for this company?
One of the things that keeps me thinking the Tesla PEM solution is less than ideal is very large number of small cells that have to be put in there. Is there a robot device that can assemble the 6831 cells into the pack? I assume that cells have to be soldered or welded together in bundles. Also it would seem to be weight inefficient to have to carry arround all that individual packaging on each cell, as well as space inefficient due to cylindrical packaging.
I know the prices of “large format” cells are restrictive, and they tend to come in proprietary packages, so the Tesla approach of using small commodity cells is certainly a good way to get the best prices and be flexible to switch suppliers easily, but it is sad that they have to go to all the effort to bundle so many of them and carry all that packaging weight around.
Well, I guess the other upside is the extra safety of having them so compartmentalized.
Some photos of different Li-Ion pack sizes:
www.fly-power.com/li-ion.jpg
www.germes-online.com/direct/dbimage/50083022/Li_Ion_Power_Battery.jpg
www.pocketpctechs.com/images/items/I63-LIBAT01.jpg
www.clean-auto.com/IMG/jpg/cleanova2_li_ion.jpg
www.valence.com/images/U-Charge%20RT-U1-lo%20res.jpg
hansabattery
Iz wants a “Whitestar” trunk, I like a hatchback, so: open the hatchback and on floor is lid for a deep trunk below it. Hatchback & trunk-you get both in one car.
As the WhiteStar concept is flushed out, please keep in mind that America is losing manufacturing jobs faster than the poles are losing their ice caps. I believe that some of us would pay a “little” more for your vehicles knowing that most, if not all, of the parts and pieces were being made in the good old USA. If “we” don’t do it, who will? That being said, I have a Roadster on order, because I believe in your mission and your company. All the best.
Proper battery management can greatly extend battery life. The Toyota Prius keeps its NiMH traction battery between 85% and 40% of full charge, avoiding overcharging and excessive discharge. The result is a lifespan exceeding 10 years or 200,000 miles.
Like the Prius, the GM Volt avoids excessive discharge to maximize battery life. The GM Volt uses a 16 Kwh battery, but uses only half the battery capacity for the 40 mile “electric only” range, the remaining reserve is used only to supplement power from the generator when accelerating.
.
Laptops, cell phones, and other small battery powered devices often go from fully charged to almost totally discharged to maximize run-time. This makes for a relatively short lifespan. Experience with laptop batteries is not applicable to EV batteries - battery managemen is not the same!
Ironically, GM designers had made preliminary plans for a hybrid successor to the EV1, expanded to carry 4 passengers and using NiMH batteries and a small gas turbine generator for a range extender. It was canceled when the EV1 was canned.
I’ve driven the Tesla the 100,000+ miles I need a new ESS and a inspection what will the cost of this service be. how much will the replacment (battery pack) cost ??
Roy, please note that power stored in a capacitor is E = U²C/2, so the linear relationship shown for EEStor on www.plasticlabels.ca/index_files/compareEVbatteries.htm is not entirely correct.
It’s however no problem at all for modern power inverters to step-up motor regenerative AC up to 3.5 kV DC. By the way, already in 1980, German thyristor locomotive series 120 sported a 2.8 kV DC bus. It had a continuous traction power of 4.4 MW and was rated for 125 mph. Of course a modern example of the same is the French bullet train TGV perso.orange.fr/florent.brisou/Fiche%20TGV-A.htm. It has a 1.5 kV DC bus and pulls off around 8 MW of traction up to 190 mph on regular service.
AC motors do not have a mechanical commutator which limits nominal armature voltage of DC motors to approx 1.5 kV. A future ZENN highway-capable car therefore also could employ a motor of so-called medium nominal voltage somewhere at 2…5 kV instead of 220…400 V, thereby reducing wire cross-section, copper mass and resistive losses (pure speculation on my side).
On the Volt your still missing the major point. The point is that what people will buy and will want to buy is an electric car that recharge
its own battery just like your current car does. Why should you wait all day and then come home at night and then have to do it? You see
who wants this job to do after working all day? I want an electric that will self recharge as I drive it or does it automatically when it is parked. Sound impossible? Well yes it is not only possible it is in fact fairly easy to do with the technology we have at hand. We just need to realize that it can be done ane will make the electric car possible for everyone. Now the Volt is going to use a turbo charged 3 cylinder ICE for starters but there are other ways it can be done. A better way to go would be to replace some of the batteries in the battery pack with fuel cells. There are fuel cells that look like your car battery but they are in fact generators of electricy that can go for a 1,000 mile before they need to be serviced. All you need to do is to run 3 or 4 together and they will recharge your battery pack while your car is setting in the parking lot at work. Slow charge, low drain. But when you come out of work your battery pack will be fully charged and you will not have to worry if your electric car can get you back home because it will always be fully charged.
You folks have had me listing pros and cons of life without gasoline powered vehicles, and the con side of the list is growing ever larger. here are a few cons. no annual smog checks (or semi annual), no gas station soil pollution caused cleanups, no storge tanks and their inherit probems, no fiery freeway crashes with loved ones burned beyond recognition, no breathing carbon monoxide fumes in your vehicle because of faulty exhaust systems, no engine compartment fires because of even minor fuel leaks, no gasoline tanker trucks crashing and BURNING, no freeway shut downs while said fuel is cleaned up, no bodies of water polluted with run off from said crashes, no oil changes, no oil filters, no jiffy lubes, no tune up shops, no muffler shops, no tranmission shops, no transmission fluid, no trasmission fluid leaks, the people who serviced the EV1 said they never had to do a brake job on one , no dirty air to breate, suicidal people will have one less way to do it (no tailpipe lol), no drive belts to break, no fuel injector cleaners, no fuel on hands and clothes at seff serves, no obnoxious gas station attendants, one less reason to need a credit card, no anti freeze, no radiators, no radiator hoses, no gas tanks, no gas caps, these are just a few cons, (whew my brain hurts) do i need do list the pros. I may have touched on a few reasons why “someone killed the electric car.”
About EEStore supercapacitor hype :
1. The company made claims about dielectric powder parameters - that is it. Claims themselves are likely correct. So they have powder with:
Eps = 18500, Eth = 3 * 10 ^ 6 V / sm, Density = ~ 6 g / sm^3 ( Eth - practical electric field intensity threshold )
For 12 um thickness of dielectric we get Uth = ~3500 V - top practical voltage. From a capacitor formula you could get
C = ~0.2 F / kg resulting to energy density ~1.15 MJ / kg = ~320 Wh / kg
For comparison Tesla Motors battery pack has 5 2 kWh / 450 kg = ~110 Wh / kg
Capacitors formulas from school text books appears well known so after powder parameters verified EEStore CHEMISTS feel safe to make bold claims.
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2. But good physicist like me knows very well that capacitors physics under extreme conditions is not textbook straightforward. The dielectric constant involved will stay at indicated value until approximately 30000 V / sm electric field strength. This value is pretty high so measurements unlikely exceed this so they give high Eps value OK.
But to get claimed energy density you need approximately 100 times higher field strength. Getting such field strenght is extremely unlikely in the Eps measurements. But the reality is that exactly in this field strenght region electrical induction gets saturation because it reaches the interatomic field strength. This is well know effect to physicysts but not very widely known phenomenon to general public. Resulted effect on the energy could be described as if dielectric constant gets reduced in the formula. My estimations demonstrates that actual energy density would be 25 - 50 times less than a claim.
Resulted EEStore capacitor would approximately match currently available ultracapacitors by energy density per unit of mass making ~5 times better energy density per unit of volume. As such it would be marginal improvement over existing ultracapacitors technology. It surely would be a order of magnitude improvement for ceramic capacitors so it would have some use. But it would be nothing as bold as EEStore claims.
In 1 - 2 years from now we will see what would be the outcome of EEStore activity. Judgement day for EEStore would come when somebody would build a capacitor and try to store expected energy into it. It would be discovered that above
~100 V voltage would grow with charge much faster than expected and finally instead of ~15 kWh it would be ~0.3 kWh at the highest possible voltage. But powder alone would match all the promises. Who knows - they might even think it is a big discovery of new phenomenon. So they would explain the failure by claiming they run into truly unpredictable effect unknown to science. Irony is that 1947 year physics knows it and today it is forgotten.
The Lotus Elise lists for $43K versus ~$90K for the Tesla roadster. That’s quite a price premium for the Tesla. To be taken seriously by consumers beyond enthusiast collectors, you can’t have much of a price premium. You probably know this: the price premium should not be more than the present value of the fuel and maintenance cost difference over the life of the vehicle. Can you show calculations how to achieve this in the future? It seems to me that changing a large battery pack every 5 years kills any financial viability. Regarding green house gas savings: there are many ways to invest ~$50K price premium to reduce green house gases. It would probably pay for preservation of quite a large tract of Amazon rain forest. But, of course, that you wouldn’t be able to show off to your neighbors so easily.
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Editor’s comment: See the blog, The Secret Tesla Motors Master Plan.
reply to norbert, whatever the cost is i suspect that it will be less than you would have spent on service and or service contracts during the same time period for your fossil fuel burning vehicle (forgot to include the cost of smog checks lol).
Based on GM’s comments thus far, Anatoly is accurate in his assessment of the Volt’s concept. With only an electric drive, the greatest benefits are to battery only operation. It’s the felxibility that an optimized generator affords, that brings an advantage. The assumption that Tesla is banking on to move down the market pyramid, is improvements in battery technology. Given recent history, it is a reasonable assumption that batteries will improve in all aspects over time. The more debatable issue is how much time to be able to move how far down the pyramid. To get to the high volume, commodity portion batteries have to become a lot cheaper (1/4 to 1/5 of the cost today). So, what should be done in the interim? Are low volume all electric, mechanically driven hybrids, and all ICE vehicles the best option? What happens as batteries do come down in price? Vehicles like the Whitestar come on line in the $50-70K range. When do available plugs start showing up in public areas (Rest stops, restaurants along the highways, parking garages, etc) and the workplace? Plug-ins hybrids can clearly be a stepping stone to get there and if they are mass marketed soon, then the infrastucture to better support electric vehicles will be there sooner. Plug-in and all EV development should be seenn as symbiotic and not conflicting. Available technology, costs, and ultimately user preference will decide what is best at the time. Today, all EV’s are limited to niche markets with the hope that future development will broaden their market potential. Tesla has commented on this in past blogs and sees plug-ins as part of an interim step. To me it is not a digital question of all this or all that and large steps. I think plug-ins should be looked at as an anvenue of incremental improvements to get us from nearly all ICE to nearly all EV. Basically a serial plug-in is an EV. They can start at 5, 10, or whatever mile range is practical and improve from there. As range improves, battery only EV’s market appeal will widen. Once the plugs are on the road, the outlets will follow.
Anatoly, does design choice have to be made between tightly coupled and loosely coupled generator and driving power? Couldn’t software and power electronics/controls make it a user choice?
What is available today? 8-15KWh battery packs are certainly available today. The available technology obviously varies greatly in cost, life, and performance? What does an efficient 2-cylinder genset weigh and cost? Could a Volt-like car be made using todays technology for batteries and gensets? How about a crossover or small SUV? Absolutely, don’t you think. The question is at what price and what functionality? In GM’s case, why not start with a Cadillac or Buick, if that’s what the technology affords? Let’s say the technology only practically allows 20 miles of battery range (20,000 mile life), 180HP, and 500-600 miles of range with 50MPG at a premium of $6000 (I think this is on the pessimistic side). With assumptions of $2.50 average gas, 7K battery miles per year, 6k gas miles, and $0.10/kwh electricity the power costs would be $447/year ($147 electric, $300 gas). This is $853 less per year than a 25mpg ICE equivalent. So that’s $2500, plus maintenance cost differences to pay for a battery replacement every 3 years. Would any dispute that battery costs will come down and gas costs go up? It sure seems plausable that serial plug-ins are viable today for certain markets today and best of all they would hasten the viability of more Teslas.
I e-mailed Dick Weir of EEstor mentioning jist of Anatoly’s posts. He e-mailed me back saying, basically , that no one understands the technical direction EEstor is taking, and that seeing will be believing when they have their battery ready in 2007. Well… not being a physicist, what do I know? (if you want to talk architecture, on the other hand…) -At least according to EEstor, their product will be out this year.
Ronald Greene wrote: “Why should you wait all day and then come home at night and then have to do [charge] it? You see who wants this job to do after working all day?”
I come home many days and am pretty exhausted, but if I’m too tired to insert a plug into a wall receptacle, then I’ve got bigger problems to worry about!
#Anatoly Moskalev wrote on January 19th, 2007 at 9:29 am
#To TEG:
#
#1. GM Volt concept is a serial hybrid. In this case almost all the energy used for driving have to go through the battery. This is probably #biggest drawback of serial hybrid prevented it from entering the market so far.
#
#2. Toyota and Honda hybrids are variations of parallel hybrid. In this case most of sustained energy for driving goes directly from ICE to #wheels via transmission. As a result battery life and associated cost is saved dramatically. The drawback of this scheme is mechanical #complexity. Apparently Japanese car companies have big mechanical reliability edge versus GM and Ford. As a result GM and Ford have #to resort to serial hybrid but need better batteries than available today to do so practically.
Anatoly, I think you made the same assumption that GM’s engineers made - that the objective was efficiency. GM’s objective was not to get the most “efficient” engine, but rather to get the engine that uses the least oil.
Quote from Bob Lutz (GM’s VP of global production) - “I’ve had countless arguments about this with some of our scientists. They kept showing me these charts where it’ll run on electricity for 10 minutes, and then on the combustion engine for 10, and switch back and forth. And I asked, “Why?” They said it’s the most efficient. So I said, “But that’s not what this vehicle is about, it’s about using little or no fuel for the majority of one’s commute.” They said, “But that’s not the most efficient way to use fuel over 600 miles.” I said, “Who cares? What’s not fuel efficient about not using fuel?””
#TEG wrote on January 19th, 2007 at 5:58 pm
#One of the things that keeps me thinking the Tesla PEM solution is less than ideal is very large number of small cells that have to be put #in there. Is there a robot device that can assemble the 6831 cells into the pack? I assume that cells have to be soldered or welded #together in bundles. Also it would seem to be weight inefficient to have to carry arround all that individual packaging on each cell, as well #as space inefficient due to cylindrical packaging.
TEG - Tesla is using multiple cells - with the encasements that come along with them - deliberately. They are doing so because it gives them a safer energy storage unit given the risks inherent in existing Li-Ion technology. By using multiple cells, if one cell goes bad it wont cause the whole car to go up in a ball of flames. Ditto for the need for the encasements around each cell. GM is avoiding this issue by using A123’s batteries which do not have the thermal run away issue.
Martin:
I read with interest your article on “The 21st Century Electric Car.” It’s been a while since my engineering school days, however, your efficiency analysis made complete sense. Am I missing something here when viewing the efficiency numbers for fuel cell technology? This analysis is pretty basic engineering fact! How can professionals tout the fuel cell car as the wave of the future? There is no future in fuel cell vehicles, short of some miraculous feats!
I would sure like to be a part of the Tesla roll out when it comes to Denver in the future. I’ve read the entire Tesla Motors website, and it is obvious Tesla has some of the brightest minds from industry developing a fabulous Tesla product! Colorado could definitely benefit from this technology.
Sincerely,
Steve Olson, M.E., Denver
Thanks Anatoly for your update on EEStor.
One important challenge for building electric cars is electricity storage in batteries or supercapacitors. But to save the climate we have to produce this electricity in a sustainable way. If this was just half as appealing as having a car…
What do you think about concentrated solar power (CSP) plants in deserts, such as the Mojave Desert in California, which have produced clean electricity for already two decades now? Sunlight is concentrated by parabolic trough reflectors to produce overheated steam that drives a conventional steam turbine. Maybe it doesn’t excite many people because it is “Low-Tech”, however, it is much cheaper than photovoltaic cells and has a shorter energy payback time. Less than 1 % of world’s deserts would suffice to cover our entire primary energy consumption:
www.ez2c.de/ml/solar_land_area/
The electricity can be transported by high voltage DC lines with acceptable losses over a distance of several thousand kilometers, much more efficient than with hydrogen as energy carrier.
The money wasted in wars for oil could make us independent of polluting fossil fuels forever, would it be invested into solar energy instead. It will require a huge effort to cover thousands of square kilometers with CSP plants, comparable to something like the Apollo program, but this is a question of survival for mankind. People of the planet have to come together to save life on earth instead of making war against each others and against nature!
Here are some links to CSP:
en.wikipedia.org/wiki/Concentrated_Solar_Power
www.solarpaces.org/csp_docs.htm
www.trecers.net/index.html
Is Tesla Motors using the TRUE TESLA ELECTRIC ENERGY or are you using the United Laboratory Listings standard or I should say “sub-standard”, meant to regulate and
constrict technology so that it conforms to capitolistic hoarding of corporate america. Tesla built a system that used atmospheric energy transmitted thruogh
transformer towers to supply the public at large, much like Henry Ford’s intention of selling a $300.00 car in the 1910’s, going from the model “A” to the model “T”.
Take care of the People first and the People will take care of Tesla Motors. Remember the people are the public and the social elite are the republic, AND THE PEOPLE
KNOW IT.
To night after an absence of several months I read all the blogs on here. I am astounded by the high quality and technical substance of many of the blogs. Very informative and valuable stuff.
But at the risk of getting labeled a pain in the ass, I repeat my questions on the battery pack.
1). Has TM test driven “on-road” their 6,000 cell battery pack to 100,000 miles or to end-of-useful-life which ever came first. ?
2). What were the results?
3). Were these results published ? and Where ?
4). How many packs were tested ?.
5). Were the test packs a true representation of the manufacturer’s standard production practices and QA , QC etc. ?
6). Was the test done on City , Urban and Freeway driving . Any rough road (pot holes) driving done ?
7). Did driving conditions include:
Hot anbient temps Phoenix in summer?
Freezing ambient temps Chicago in winter ?
Answer NO to any of the above questions and WE HAVE A PROBLEM (a big problem).
Let us know
Galactic Cannibal
Thanks Wolfgang for the capacitor energy formula correction. The proper curve for EEStor looks even more attractive now.
I find it hard to believe that Anatoly is right, that is EEStor would make these claims without testing first. They are about to release product, not just at the begining of research.
Well, what to say? You folks are the only company I really trust around and look forward for your future models (I am keeping money apart for your next sedan!). GM is keeping make fun of its own audience with big lies to lobbying oil based technology, so… we have only you guys!
My only critique: please, answer to our e-mail inquiries, I sent to you several e-mails asking where I can see your Roadster in southern California and I never had an answer…
Thank you!
Fabrizio Ferrari
Virtual Sheet Music, Inc.
www.virtualsheetmusic.com
—
Editor’s response: Thanks for your interest in the Tesla Roadster. The best way to find out about upcoming events is to visit our Events page. We don’t have any events planned for this month, but please check back soon.
EEStor filed its patent on April 12, 2001. They are backed by some very high profile investors who have spent millions of dollars to bring EEStor to where it is now, and you Anatoly, believe that in all this time they have progressed no further than theory? That they haven’t got even 1 capacitor in the lab operating to prove their claims? The 52kWHr 31F capacitor described in the patent consist of 2230 smaller capacitors in parallel. This smaller capacitor would be 14000uF and this is all they would have to build to test their theory. Somebody suggested that ZENN motors had an exclusive right on EEStor batteries, only for Neighbourhood Electric Vehicles. Tesla could purchase directly from EEStor. Assuming EEStor’s claims are real and there is no major complications (ie cooling or motor control) to building a large module, Tesla could more than double their range with EEStor in the Roadster. If I were a customer I would be willing to wait an additional six months to get double range and near infinite life.
I was discussing EVs with other locals on the message forum of my town’s local newspaper. One fellow asked about the logistics of recycling the batteries that might be used in EVs. I don’t recall that this aspect of an EV “revolution” has been covered in detail on this site, and I hope that it will be the subject of blog column or whitepaper someday soon. Suppose that Tesla is wildly successful, in being able to put tens of thousands of EVs on the road over the next several years. What happens when the ESSs need to be replaced/disposed/recycled? How much of the materials can be used again in new batteries, battery packs, or other products? How “green” is the disposal process for material that cannot be recycled?
If this topic has been covered in depth somewhere on this site, I missed it. In that case, I’d appreciate the URL… Thanks.
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Editor’s response: The short answer is we have a plan for recycling. You can find the information we currently have available to the public on our Recycling page.
# david moxness wrote on January 20th, 2007 at 1:28 pm
# You folks have had me listing pros and cons of life without gasoline powered vehicles,
…(nice list of downsides to ICE vehicles)…
# … no tranmission shops, no transmission fluid, no trasmission fluid leaks,
# … no anti freeze, no radiators, no radiator hoses
Keep in mind that the Tesla roadster has a transmission (albeit only 2 speeds), as well as coolant to manage battery temperature.
My RangerEV was a water cooled electric motor and a conventional radiator with anti-freeze in the usual place.
So, a few of the things you mentioned are still applicable to many EVs.
OOPs I was wrong, ZENN agreement with EEStor is for vehicles up to 3080lbs, so if Tesla does want to buy these ultracapacitors it will be through ZENN
Long time reader, first time poster. Keep up the good work!
I have a few questions which I don’t believe have been answered yet. You’ve already read my mind and answered some of my questions (such as the option for partial charging to potentially prolong battery life and having a timer on the charging unit), so thank you.
Will there be a future option to have a transponder key fob like the Prius? I currently like not having to pull the keys out of my pocket when entering or driving my car. My other vehicle feels so primitive when I need to pull the keys out of my pocket. The ignition code is a great feature by the way.
Will you offer a car cover for the Telsa, and would it impact the battery cooling system (which it sounds like the ESS has) on hot Southern California days?
Will the roof be transportable in the vehicle? It would be nice to start off on foggy morning (I live near the coast) with the top on and to be able to take it off later in the day when the weather warms/dries up.
Will you offer an option to download data from the car to an owner’s computer and give them ability to upload this to you? This information could help you guys track vehicle performance in the field and also offer users a peek at how their vehicle is doing. I understand sometimes you don’t want your customer to know too much about the product, it just results in additional support requests, but as a potential customer (I’m 6′9″ so I don’t yet know whether I would fit in a roadster, and no, the Prius doesn’t really fit:) it would be a fun feature to have.
Also, I understand the difficulties of a young growing company supporting a lot of choices out of the gates, but in the future it might also be nice to provide, much like current auto manufacturers give V6 or V8 engine options, motor & battery options. It was mentioned how fun it would be to have a GT roadster. It would also be interesting to give an option of a half battery pack, something that might hurt power delivery and shorten the range, but I would imagine it would also shave a few hundred pounds off the weight of the vehicle and could potentially improve handling (and give the owner the excuse to upgrade to newer battery technology a few years earlier:). Also, as new battery technologies come out, those too could be offered as options (A123 & Altair come to mind if their technologies become proven where perhaps range could be sacrificed but battery life and/or power could be increased).
I know the community truly appreciates the ability to give input and ask questions in addition to seeing some of what it takes to bring something like this to market. I look forward to future posts & hopefully the eventual opportunity to see if I fit in a roadster!
Here is the full text of Dick Weir’s e-mail to me when I raised Anatoly’s doubts about EEstor Co.: “It is obvious that Tesla Motors does not understand the technical direction that EEstor, Inc. is taking. Of course we can make that statement about everyone else on earth. Seeing is believing and the latest EEstor, Inc. press release is the beginning of the certification process and in 2007 our battery will be functioning in someone else’s electric vehicle. I wonder what Tesla Motors will say then. It will be interesting”. - Any comments, Anatoly/ Tesla mavens/ anyone else?
Many, many companies before EEstor have made inaccurate claims, so it wouldn’t be surprising if theirs are too. Let’s hope not, though. If they are anywhere close to accurate, it would be HUGE! Like, wheel huge or transistor huge. Although I’m not a theoretical physicist, Anatoly’s comments make sense for traditional capacitor design. As EEstor hints at and Anatoly wishes for in a previous biog, perhaps there is more to their technology than just fancy powder. Maybe they have found a way to keep the localized field strength below theoretical limits mentioned by Anatoly.
Here is an idea from Japan to combine at a nano level a lithium ion battery and ultracapacitor to maximize power and energy density:
Electrode Made from Mesoporous Nanocomposite Materials to Upgrade Power Density of Lithium Rechargeable Battery by Two Orders of Magnitude or More
-Lithium Rechargeable Battery with Super-Capacitor Feature Made Available -
www.aist.go.jp/aist_e/latest_research/2005/20050203/20050203.html
Here is a paper about limits to capacitor energy density from Lawrence Livermore National Laboratory with equations and experiments and comments about practical problems of dielectric materials:
www.llnl.gov/tid/lof/documents/pdf/242927.pdf
Editor, There use to be a page on the site that said what dates the Tesla service centers would be opening in the respective cities. I cannot find it now. Is it gone? If not, can you post it or give us those dates? Thank you.
—
Editor’s response: The location of our planned Tesla Customer Centers can be found on the FAQ page. See: Who will service my Telsa Motors car?
Article on EEstor just came out today on “MIT Technology Review” website-along with comment posting by Emosson re. posts here by him & Moskalev. He says Moskalev is a professor (that adds up)-wonder where at? Says in review article that Dick Weir is an elect. engin.-guess he should know where E & M are coming from. He sticks by all the company claims. - “!! niatpac gnitanicsaf”
To David Kosowsky:
Engine optimization to be the most efficient generator implies deep changes of engine itself. For example you have to swithc to Atkinson cycle instead of Otto cycle. Also generator would have significantly smaller power like 40 - 60 kW instead of 100 - 150 kW in case of normal ICE. This means that it will not be enough [ower and ICE generator dynamic range of power to operate in tightly coupled mode. So answer to your question is negative - choice happens at power plant architecture level and is not easily reversible especially in mass production line.
To David:
You imply that driving could happen without using gas basically in totally electric mode. For the modest car price range surely below $30000 it have to be for a limited range like 40 miles or less. If this mode of operation have to be most important it still makes no escape from the fact that major fraction of total driving energy flux goes through the battery pack. So we come to mentioned by Martin Eberhard problem that battery depreciation cost is independent from battery size and upfront cost. Tesla Motors engineering choice was to absorb high battery pack cost by car price on a high end cars market. This is wise choice making them successfull as a business. But it has nothing to do with going out of oil dependence in mass transportation. For typicall mass market battery cost today is about 4 times too high so either somebody should deliver 4 - 6 times more recharge cycles per same energy and cost or market would be locked with Prius style parallel hybrids as most successful.
To Andreas Kay:
The system you have mentioned is probably most old thermal solar technology in mass scale use. It is under use for ~20 years already I believe. Unfortunately it did not come to cost parity with coal power plants. As such business is not encoaraged to invest - end of story. Biggest problem is that accumulating heat tubes have too big surface and are too lengthy. This causes service overhead problems not really reducible much. Another “stupid” problem is severe dust accumulation on reflecting surfaces in dessert environment requiring overhead on clean up ( water is expensive in such places by the way ).
In thermal solar I believe tower systems are better and might come to cost parity with coal generators but it will take time. These thermal solar systems I believe are potentially more cost efficient than solar panels but biggest issue is that high upfront investment required - nobody want to risk for new technology at this level of investment. Today big investors are extremely risk averse as you can see from big car companies not doing right things for dozens of years and countless other examples of big business not acting. That is why for example Stirling engine based solar thermal systems are popular regardless that they are cost inefficient - no big invetment is needed.
Solar panels are much smaller so they could much easier come into use and prove themselves in a bottom up way through “grass root” kind of movement of environmentally concerned middle class people. I believe this is probably the most important reason of their growing popularity.
To David Kosowsky:
I actually estimated myself parts availability and cost if I take 15 kW electric generator from Honda, take body of Honda Civic and place electric motor located as a replacement of gearbox. I was considering serial hybrid concept and considered to use Maxwell 3 kF ultracapacitors as electrical energy buffer between generator and engine. Cost end up under $25000 - $5000 for ultracapacitors. The key problem for me is time and effort to build such a car. Another issue in this concept would be that such car would not have good uphill dynamics. It would be quick on the plain and up to 400 feet uphill but higher it would be very slow climbing - not a car for general public. Decision to use ultracapacitors come exactly to save battery replacement cost because of expected high energy flux through electric energy buffer. Also it is too easy to kill batteries by unavoidable mishandling in a single person design. So my concept is not very practical but I expected even much worse cost outcome than what I got. Anyway I give up early in the process.
Also my much older than me retired friend having plenty of time is testing his third I believe self-made EV. This time he used fairly big Li-ion batteries from China for his last EV contraption but so far did not succeed to make these batteries to operate properly. His budget was also close to $25000 I believe not counting his own labor and time.
Key problem is that people has high car features expectations not easy to match with low budget EV possibilities. Our contraptions were at a cost of a good new car but required significant personal time and effort and skills. Also they did not promise to get no compromise features of a normal car. I do not think today technology make realistic possibility of normal use car with electrical drivetrain in price range below $25000. If A123 and/or Altairnano would become inexpensive - may be serial hybrids would come to mass market.
Great blog! I agree mass production of batteries is needed. When the government gives A123 cash, does it go to build facilities in other countries?
One thing i’ve noticed is that Oshinksy’s process of rolling metal out on an assembley line and coating it with materials (nano-tech and standard) in a vacuum, then baking it on, is used in batteries, capacitors, and solar PV.
Maybe the government cash ought to go to develop production lines of this type that are adaptable to various devices? This production line equipment mass produced would encourage investment in the various devices. A production facility would not become obsolete with a particular device. For instance, NIMH is obsolete because of Li-ion, Li-ion might become obsolete because of ultra-capacitors; a production line that could be switched as advancements are made would preserve the investment.
What will happen to A123 if practical electric car ultrcaps are developed? Bankruptcy. This is what is holding up investment in battery mass production, as well as big oil/auto company opposition at the capital allocation level. Who will be the MSFT of this energy re-evolution? Whomever can adapt and use the latest, greatest developments. The rest will go the way of the 99% of startups that are hardly remembered.
I agree that 500 million ought to go for mass production here in the US. Why give away yet another trillion dollar manufacturing market to asia?
I admit that while I went to college to become an electrical engineer, I did not go into the dialectric property changes at high electric fields. I also admit that I was stunned when I read the claim of 332 W*hr/kg while one of the best ultracaps I know (by Maxwell Technologies) is only 4 W*hr/Kg. Let’s see what the real set back for the EVs will be if EEStor can’t deliver the goods:
Use Altair Nano batteries for high power bursts and the first 40 miles of each trip. A bank of 100 Kg will provide 400 KW of power (4000 W/Kg) and 9 KW*hr of stored energy. It has been reported that these batteries can be fully charged and discharged 15,000 times. So in theory, these batteries can propel a car for 600,000 miles. Of course, batteries will also lose capacity with time alone but that information has not been collected yet.
Now use the new Electrovaya batteries with an energy density of 330 W*hr/Kg. No numbers on power density have been released but for the sake of argument, lets assume only 1000 W/kg. A bank of 300 Kg will provide 99 KW*hr of energy capacity and a maximum power of 300 KW.
So, for 450 kg of batteries you have a total capacity of 108 KW*hr of energy capacity and and 700 KW of maximum power.
But what if the EEStor capacitor is not a hoax? 450 kg of these caps at 332 W*hr/Kg will give you 149.4 KW*hr of store energy. Of course, if you know anything about caps you know that the discharge curve is a decreasing exponential. Once the voltage falls to 1/2 the max voltage, you only have 25% of capacity left. To use this residual 25% energy, the current would increase to unacceptable high levels so for practical purposes, the usable capacity is 112 KW*hr.
So you can see that there is not a substantial gain in usable capacity between today’s batteries and the still to come ESStor capacitor. Power density is expected to be even higher in these “hyper caps” than 700 KW, it is extra power that will never be used. As a matter of fact, if these new caps have power densities equal to the ones made by Maxwell technologies (15 KW/Kg), a capacitor bank of 450 Kg could provide 6750 KW of peak power. Additionally, increasing the internal surface area of a capacitor will reduce its internal resistance, therefore, if EEStor is successful, I expect ever higher power densities than those in the Maxwell capacitors.
EEStor made a claim that the only concern during high power discharges was how to cool the conductors joining the caps! What this really means is that the capacitor internal resistance is so low that the ohmic losses are negligable. These means that there is no need for cooling systems.
Hey Galactic, Telsa’s blogs www.teslamotors.com/blog1/?p=42 and www.teslamotors.com/blog1/?p=43 give at lot of confidence (to me at least) they’re serious about durability/climate testing.
MIT Technology Review has published an article on EEStor. Here’s a quote:
“Purification gives you better production stability, gives you better permittivity, and gives you the high voltages you’re looking for,” says Weir. “We’ve now got the chemicals certified and purified to the point we’re looking for.” (Better permittivity of the insulator improves the amount of charge that can be stored without letting the current leak across the two plates.)
One never knows what’s going on behind the scenes at Tesla, but I can’t see how they could ignore this. In so far as it works, it might lower the barrier of entry in the electric car field and put some pressure on them. They really had better be working on features that would distinguish them from the rest of the field in other ways than their current energy storage technology. I do wish them all the best.
Stephen
I think more people here need to actually use an electric vehicle to go to work. Recharging the batteries every night is a big deal because your vehicle is out of service for that period. A self-recharging electric will spare you of all that and will offer the same convinence as our
present ICE’s. Thus, the car can always be used because the battery is always fully charged. Suppose you just came home from work
the battery in your electric needs to be recharged but your kid is sick needs to see a doctor are you going to make him wait until your
battery is recharged 8 hours later. Thats not how Americans live. We want and need full time mobility? I do not think that large numbers
of people are going to trade their ICE’s in for part time mobility? But the thing is we can build self-charging electrics and it a much better
idea because there is no waiting to use you car. While I do not recommend fuel cells cars because of their poor performance why not use them instead as generators of electricity to recharge the batteries automatically which will give us the performance we want without the
hassle.
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Editor’s comment: Take a look at our Charging and Batteries page.
I’m not a physicist, let alone a good one, but couldn’t resist to give it a try from my old undergraduate text books in electrical engineering.
Not having been able to find any precise numbers on inter-atomic electromagnetic field strengths (see eg hyperphysics.phy-astr.gsu.edu/hbase/forces/funfor.html), I calculated electric field strength for a dipole the size of an H atom: E=ΣQ/(4.π.ε0.r²)grad r, using elemental charge Q=e=-1.6022E-19 C, permittivity of empty space ε0=8.85E-12 C²/N/m², and atomic radius r=25 pm=25E-12 m I arrive at E=1.84E+13 V/m.
EEstor’s patent cites a dielectric thickness d=12.76 µm and applied voltage U=3.5 kV, giving E=U/d=2.74E+8 V/m. In fact they claim dielectric breakdown at 5E+8 V/m.
From this crude comparison, atomic electromagnetic field strength seems five orders of magnitude larger than applied external field strength. So I expect its effect on molecular dipoles must be negligible. Did I miss anything? Are my numbers off? I’m certainly not experienced with ferroelectric ceramics like BaTiO3. So I hope EEStor are really up to something.
Has anyone looked at the Advanced Propulsion Technologies two stroke diesel as the ideal engine for an onboard generater. This engine has been in production for four years. It’s compact, quiet, very low vibration and very fuel efficient. I feel this is the missing link for an indirct hybrid. Any input and comments would be appreciated. I feel this coupled with altair batteries would make the ideal car based on current technologies.
Arthur W. Hanson
Wolfgang wrote on January 22nd, 2007 at 10:24 am
Hey Galactic, Telsa’s blogs www.teslamotors.com/blog1/?p=42 and www.teslamotors.com/blog1/?p=43 give at lot of confidence (to me at least) they’re serious about durability/climate testing
Wolfgang, thanks for the info.
I read their test and agree with you that TM are working on durability/climate testing.
But that has very little to do with drive testing for 100,000 miles and publishing the results.
So my valid questions still stand, as posted on January 21 2007.
GC
When is $50K LESS THAN OR EQUAL TO $43K????
Answer: When life cycle costs and the time value of money are factored in to the $50K buying decision.
Take a $43K purchase price of a BMW 525i (MSRP is say $47K). You got a deal! Now, assume 12K miles per year @ $0.10 per mile ($2.50 /gallon gas @ 25 MPG). For gass, you are spending $1200/y for 9 years for 108K miles. Now, assume oil change every 3k miles at say $29/oil change. The present value of these cash flows (9 years) at at 8% interest is $51.2K. So, when you buy the BMW now you are really committing $51.2K today for the life of the car. (in this example) The total expenditure will be more than $51.2K. $51.2K is just the present value of the money that will be spent in the future.
Now, take $50K purchase of “White Star.” 12K miles per year @ $0.01 per mile = $120 per year. No oil changes. The present value of these cash flows (9 years) at 8% interest is $50.7K. With the White Star you are committing only $50.7K to current and future payments. (In this example)
$50.7K IS LESS THAN $51.2K - and the White Star buyer helps the environment and lessens our dependence on oil too.
I realize than many assumptions can be made about interest rates, gas prices, cost of oil changes, other costs of maintenance and insurance, length of time the car is owned, cash payment vs loan, etc. All of these and others will change the end results of the calculation and the present value based buying decision. The point is that BMW is currently selling their 525i at a price point that is very similar to the White Star target price when discounted cash flows are totaled in my example. The average Joe may not buy a BMW 525i but many people do. Same goes for a White Star. The average Joe may not buy the car, but many people will. If Tesla, can get the price point to $45K , they will be able to attack the under $40K gas powered market.
I’ve read rumors of a 3rd generation Tesla electric vehicle at the $30K price point. If this becomes a reality, a $30K electric vehicle will compete up the under $23K gas power car market. The average Joe will be able to afford the $30K 3rd generation Tesla electric vehicle. Martin, is 2011 too soon to hope for the third generation vehicle????
## Kcops wrote on January 21st, 2007 at 6:23 pm
## Here is the full text of Dick Weir’s e-mail to me when I raised Anatoly’s doubts about EEstor Co.:
## “It is obvious that Tesla Motors does not understand the technical direction that EEstor, Inc. is taking. …”
It sounds from that like you mistakenly attributed one of Anatoly’s comments to Tesla Motors itself.
I imagine that you sent EEstor an email with something like “from the Tesla blog: {blah}” and they took that to mean it was writing’s from Tesla itself. You may want to send EEstor a followup note letting them know it was just a “random blogger” who made the comments, not Tesla Motors itself.
If Tesla is to ultimately consider using EEstor technology it would probably be best if we didn’t give EEstore the wrong impression by mistakenly suggesting that Tesla is doubting their technology.
(On the other hand if Tesla want to go on records with doubts of EEstor’s claims then forget what I said!)
In the EEStor coverage, I read that the company was going to make 15kWh storage units available to Zenn, and that these units could recharge in a few minutes. For five-minute recharge, that would require around 52A at 3500V. It is interesting to me to see quick-charge being claimed as a “feature” of the device, or a benefit to the vehicles that will use it, without any mention whatsoever of the means by which quick-charging can occur. It’s not coming through the wall-socket, that’s for sure.
I live in Rochester Hills, MI and glad to hear about a company coming here to tap into the talent pool that is great and under utilized at this time. I have developed vehicles around the world and find the Metro Detriot area a stong contender in the world with great engineering talent. Michigan is in some real tough times right now and needs to re-invent itself and use its experience on a positive impact program. We are lean and mean and ready to heip develop this vehicle for Tesla, thanks for the vote of confidence and the opportunity.
Note that 3 years ago GM and CSIRO here in Australia have built both a series hybrid demonstrator:
www.csiro.au/csiro/content/standard/ps1h4.html
… and a parallel hybrid demo :
www.csiro.au/csiro/content/standard/ps1l2.html
They both used ICE with ultracapacitors and lead acid batteries.
I wrote a paper on the electric vehicle’s impact on CO2 emissions and am interested in your thoughts.
home.comcast.net/~evstudy/CO2.htm
Greene wrote:
Suppose you just came home from work the battery in your electric needs to be recharged but your kid is sick needs to see a doctor are you going to make him wait until your battery is recharged 8 hours later.
How many ways is this ridiculous?
Take you other car.
What if you did not have enough gas in your gas powered car to get to the hospital?
What are the odds that you have driven you car to the very last 250 mile runout “drop” before you pull into your driveway? Even if you did, you only need to charge it the few minutes to get to the hospital -assuming it’s not 250 miles away!
Call and ambulance or a paramedic.
Ask your neighbor.
Don’t leave your kid home alone.
Stop wasting time with specific “what if?” scenarios
e
On MIT Technology Review is blog posting by Roger Pham (”Further evidences of EEStor hype”). I don’t get why Dick Weir would bother to e-mail Kcops back saying “we are doing what we say” if they’re not. He could have said nothing. What’s up with that? Is it possible they’ve made a much smaller battery system so that even though it doesn’t generate the power per size, it is, say, 10 times smaller- so that in the space of a “normal”battery it stores 10 times as much. This stuff is beyond me. Right about now it would be nice to personally know a physics whiz to get another take on this-along with Emosson, Anatoly & Pham. Like I said, why would Weir bother to respond-sticking to his guns? I couldn’t bring up Celuliak’s Livermore Lab link (need cable I guess-too much there). But that’s O.K., it would no doubt be 80% greek to me anyway!
To TEG- I e-mailed Weir of EEstor back at the time & explained it wasn’t Tesla saying this-but Anatoly & some others. Also said that, as Tesla said in earlier blog post, “if a better battery comes along one day we would use it”. Told Weir he should check out the blog posts of Anatoly & Emosson lately. I was shocked Weir even e-mailed me back in the first place.If it’s hype you’d expect no response from the EEstor maven at all , right?-So what’s with that?!
Comment from the National Research Council concerning the EEStor hype:
“Barium titanate is the most popular dielectric material used for multilayer ceramic capacitors (MLC), but the dielectric constant drops as a function of electric field.”
Citation from Combat Hybrid Power System Component Technologies
To Wolfgang:
You just did a dipole estimate not related to real material structure. I could say that there is no limit to the field strength estimated this way - the close to the electron you go the stronger field you could get. So you could claim arbitrarily strong fields and no limits. But this would be hardly realistic.
Good estimate of interatomic field strength could come from energy consideration. Chemical energy of molecular bonding by order of magnitude comes from electrostatic attraction of atoms in molecules. So field strength delivering this energy density of strongest chemical reaction would be a good estimate for interatomic fields in question. If you exceed this field strength molecular structure would be disrupted and material would be destroyed. It exist a formular for volumetric energy density of electric field in a vacuum as follows:
= Eps0 * E^2 / 2
Eps0 = 8.85 * 10^(-12) F / m - dielectric constant for a vacuum.
Most energetic chemical reactions like burning hydrogen in oxygen and similar give up ~14 MJ / kg of energy if you take into account mass of all reactive components. Hydrogen has ~120 MJ / kg but without weight of oxygen needed for burning included in estimate. Density of reaction products would be ~1000 kg / m^3. This is pretty characteristic reaction in terms of volumetric energy density. Other reactions could have bigger density but smaller energy production per unit of mass so more or less chemical energy comes to ~15 x 10 ^9 J / m^3. Using the formula above and assuming for convenience about 3.5 times higher energy density ( favorable for EEStore because of bigger interatomic field ) we end up with:
sqrt( 3.5 x 2 x 15 x 10 ^ 9 J / m^3 / ( 8.85 x 10 ^ (-12) F / m )) => 10 ^ 11 V / m => 10 ^ 9 V / sm interatomic field strength.
As you can see we come up with ~200 times less field strength estimate from energy considerations. Energy is fundamental value so I think this is more close to reality estimate than artificial dipole local field strength.
EEStore claim breakdown electric field strength threshold ~3 x 10 ^ 6 V / sm. This is about 1 / 300 of interatomic field strength. Dielectric constant characterizes the ratio of electric field made by charge in a vacuum by electric field for the same charge in a material (same geometry). The physical effect making field in the material to diminish like this is that electronic clouds for atoms shift to compensate the externally applied field in a capacitor because they experience the force from that field.
From this consideration is is hard to imagine that this compansating field could exceed interatomic field - it is not logically possible. So at claimed electric field threshold average dielectric constant Eps should be close to 300 instead of 18500. Dielectric constant of 18500 for low field strength means just that electronic clouds are basically soft and easily compensate external field almost perfectly. So for field strengths about 50 times smaller than threshold it is perfectly OK to have such a high Eps.
Now even this “low” field strength corresponds to 60000 V / sm. For measument equipment this is insanely high - like high voltage power line. It exist no standard equipment to measure dielectric constant at fields above that “low” limit - you have to build your own special devices from scratch.
But you would not see any reduction of dielectric constant lower than this fields. So it is likely to suppose that measurements were in fact made below this threshold unless EXPLICITLY explained upfornt by EEStore that they did care about this. It is not obvious.
I do not see such precautions from EEStore explaining what they with the powder. So it is very likely that they do not understand this issue. But your highest energy comes at upper threshold of electric field and it is proportional to actual average value of dielectric constant at top voltage.
EEStore unique achievement is that they pushed high the upper threshold electric field strength by more than 10 times. So before them nobody except physicists of the past even comes to the field strength region in question. So previous industrial experience to use the powder material is not valid.
Now what we have:
1. If you use Eps = 300 instead of Eps = 18500 you get ~50 times less energy per unit of volume.
2. There is no previous experience of use the dielectric material in question for implied field strengths
3. There is not a word about the effect I described from EEStore. And this effect does not make any trade secret - no reason to hide it. Actually would they comment the effect upfront themselves they would get better credibility.
Under this conditions I would think that at least some proof is needed that effect I estimated and explaned in such details is irrelevant.
OK I am nobody and piece of trash and EEStore people are great Gods. So whatever they just say with no proof is surely gospel truth and who am I to question Their Majesty. Want to have faith without proof in this technology - just do it - no issue with me.
I know who I’d like to hear from on “The Great EEstor Battery Hope or Hype Debate”-Wally Rippel of Tesla (if not Martin). Re. ultracaps losing a lot of their power quickly in use, I seem to remember Martin post where he said that can be overcome with some tricky electronics-allowing them to act like regular batteries.
Re. Patrishkoff post, Guess Detroit is at a low ebb due to 3 things: it is run by people who are not engineers (or designers, at least), but bean counters (in practice if not reality), they also didn’t care about design in the 70’s,’80’s -or quality either (as in ” no pride in their product”). Of course in the ’90’s they started to change, but it’s still going on. Then there’s the health care & other “union cost baggage money drain issues”. A fourth problem is, being bean counters, they aren’t inclined to do the right things (like hybrids) until absolutely backed into a corner. Another annoying thing is that, like so many other American CEO’s they pay themselves a pile of undeserved money. Entire boards of directors in this country should be tarred & feathered and run out of (the company) town. Detroit needs to turn the engineers & designers loose across the board. Ford did this wiith the Mustang (at least in design) and they got the best one since ‘67 (took them that long to get with it again). Maybe Tesla will do the Whitestar plant in Michigan. If not, maybe one day there’ll be more than one plant-with one in Michigan. That will be nice.Then they can help clean up inner city Detroit while they’re at it-I hear it needs rehab. That would be a fun job-really-turn it all green, solar on every rooftop., tear some of it down for parks & rec. (with native landscaping).The big three ain’t going away, so Tesla should stake out the high ground (like BMW ,in principle-though I don’t really like all their designs). If Tesla stakes out their own “cachet” in terms of the technology/ design gestalt, they’re set, regardless of the big three or anyone else.
To Roy Harvey:
1. High profile investors are NOT physicists. So regardles how high profile they have they are no better than any regular person in physical effects area. So they hired some experts to tell them is it real or not.
2. Very few people ever experimented with such a high field strengths. Also science people are not trusted in U.S. nor by general public nor by high profile investors to make judgements for respected investors. So experts likely comes mostly from engineering circles. But previous engineering experience is not relevent because of field strenghts involved - nobody ever tried such field strengths in the material in question.
3. Dielectric saturation effect is not very well know. Engineers do not encounter it much if any.
4. The EEStore venture would not be considered HIGH risk if it would not be related to fairly unknown area.
5. Physics knowledge diminished considerably from mid XX century hey day because physics is not very useful to modern business.
Under all this conditions what is so unbelievable that some investors missed some crazy physical effect. It happened before in plenty.
But I have no personal interest to prove or disprove EEStore claims. I am just a blogger discussing interesting to me matter from the angle of cherished by me physics. Arguments that some respected individuals trusted something are void to me in the area of physical effects. Who trust what is irrelevant including my distrast in EEStore claims. They may be right or wrong - time will tell.
I expressed my personal opinion only - that is all. I got PhD in solid state physics and worked few years as professional experimental physicyst so I know some unusual to general public effects.
BUT I am not pretending I have any hidden proof or evidence. My opinion has no more weight than opinion of any other person on this blog. I do not represent any organization or interest group. I do not advice anything to anybody. I am not even professional scientist any more. I am just going with my hobby discussing physical effects. Please, everybody, keep this in mind if using my explanations for any purpose.
TEG - While normaly I would totaly agree with you in regard to the implausibility of a quick charge, in the case of EESTOR I would take pause. If EESTOR’s claims are correct (big if) than above and beyond all of the other wonderful properties of their energy storage unit, the cost of their ESUs would be around a fifth of a similar capacity battery. With that sort of price difference it could conceivably make sense to purchase 2 units - one for the car and one for the charger. The charge pack would then fill from a wall-socket at normal rate, and upon demand would be able to dump/quick charge the car’s unit in less than 5 minutes.
Something has been bugging me lately about Tesla. I have been a loyal Tesla fan since I first studied the concept, but after all these months I have come to a point where I am afraid that Tesla is spinning it wheels (mind the pun). Tesla may be entering this market a couple of months, or even a year too early. Tesla’s theory is that it would start producing EVs now, shortly before they become economical for the mass market; so that when they do become more economically feasible Tesla will have a head start on the competition. To accomplish this, Tesla invested much money and effort into building the most technologically advanced electric vehicle possible with currently available technology. This would seem to be the logical way to learn and develop all of the intellectual property that is associated with this new technology. However, I am afraid that most of their effort, and intellectual property will be for naught. It seems that the greatest effort and IP that Tesla put forward is their Energy Storage Unit. This unit is the most technologically advanced of its kind, and incorporates an extensive heating system to make sure the battery doesn’t freeze, and a cooling system to ensure the battery doesn’t explode, and separates the battery into individual compartments to avoid thermal run aways, and has computer controlled circuit breakers on individual blades of batteries, etc., etc., ad nauseum. All of this is necessary given the current state of technology. But all of the most likely and promising technologies to come to the market - some currently on the market, others expected within the year - do not have the same sort of limitations that the batteries that Tesla has used have. A123, Altairnano, Panasonic, Electrovaya, EESTOR, 3M, etc. - all of these companies have or will shorly bring to market a battery that is not affected by thermal run away, is not incapacitated by cold or heat (except in cases of extremes not regularly seen on planets this far from the sun), and so would not need all of this wasted Intellectual Property. And while Tesla certainly has learned much from the building of the roadster above an beyond the battery pack, it does seem that the pack was the place where Tesla excelled beyond the standard. Given that all of the major auto manufacturers have plans of their own for EVs at this point, and will have a significant leg up on scale and funding, and given that once the new battery technology comes out (which ever one becomes dominant) Tesla’s existing IP becomes obsolete, I see little competitive edge that Tesla can bring once the EV becomes economically viable for the main stream. The only way that I can see Tesla beating the big 3 is by playing as a profitable niche player on the high end - but I don’t think that Tesla will be content to remain on the fringe. The good news is that at this point I am more confident than ever that the future of the automobile will be electric; the bad news is that, though I hope I am wrong, I don’t see Tesla as being the auto maker that will be selling the masses this product.
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Editor’s comment: Take a look at the blog, Balance.
Congratulations on creating 50 new jobs and stimulating our economy!!! That is the real goal of any entrepreneur, I would argue enjoy the ride not the technology.
VOLT vs TESLA vs PRIUS:
Conventionals (15% efficiency) are yesterday, hybrids are today (37%), plug-ins tomorrow (50% est) and electrics are the future…
Is it a matter of battery technology or patent control?
If it’s tech, I say efficiency is king!!!!
If it’s patent control [the Prius racked up 650, the Ford Escape Hybrid 350, Tesla and Volt (?)], the deep pockets and heavy hitting legal teams will be kings…
I hope you hired some great patent engineers, CAD guys, paralegals and lawyers. I’d take an A legal team over any other function if I was going to try and swim with the elephants in the world’s largest business.
I wish those 50 new hires (patent lawyers included) all the things they need including health insurance, families and security!!!
Thanks evstudy for your excellent analysis of electric vehicle’s impact on CO2 emissions.
Obviously EVs alone can’t preserve us from a climate disaster, as long as electricity is produced by burning coal. However, the technology to produce clean electricity at a competitive price exists. With concentrated solar power (CSP) the entire primary energy consumption of North-America could be covered by only a fraction of the available desert areas. CSP plants in California have been working reliably for 20 years and produced more electricity than all photovoltaic panels combined.
Each km2 of desert receives solar energy corresponding to 1.5 million barrels of oil annually, or a layer of oil ten inches deep.
Already now “solar fuel” costs can compete with oil at 50$/barrel.
European governments have started to invest in clean, sustainable energy, while the Bush administration is still wasting your money to defend black oil. In order to tackle climate change and fossil fuel depletion, we need an immediate (inter)national program, comparable in its dimensions to the Apollo project. The suffering automobile industry could find an honorable and profitable enterprise in building thousands of km2 of thermal solar power plants from steel and glass. An investment that would provide us and our children with clean energy as long as the sun shines on earth…
The point about charge cycles for the battery pack is common to Parallel Hybrids like the Prius and Series Hybrids like the Volt. Actually the problem is more severe with the parallel hybrid, since it uses a much smaller battery pack and therefore must absorb a great deal more charge/discharge cycles than the series HEV. What they do in the Prius is simply use a 1.2 kwh NiMH battery pack that is only 25% utilized. And it is charged / discharged each time the vehicle does an accelerate / brake cycle.
Note the Edrive and Hymotion Li-Ion PHEV Conversion battery packs (similar size as the Volts) endure the same problem as the Volt, and are rated for 5-10 years, with a plugin range of 50 miles. And they manage that with a 75% utilization factor.
The NiMH batteries, long available, have excellent charge cycle capability, and are rated 4000 cycles at 70% utilization. The NiMH battery works just fine in PHEV’s, EV’s or Series Hybrid EV’s, and everything points to a production cost, in Volume, of $130 to $250 per kwh. That’s $1200 - $2500, and weigh 220 lbs, for the Volt type vehicle battery. My car starter battery weighs 65 lbs.
This quote is from GM-Ovonics in 1998:
“A more significant problem is the Power to Energy ratio of the small parallel HEV battery pack. For the larger Volt battery pack in Li-ion or NiMH this is not a problem, but for a vehicle like the Prius, it puts severe limits on how much braking or downhill energy the battery pack can absorb.
GM already developed a perfectly functioning Plugin Series Hybrid, based on the EV1, 10 years ago. Quote from 1998:
‘GM’s series hybrid (using an electric motor to drive the front wheels) uses a compact micro gas turbine generator system to charge the GM Ovonic NiMH HEV battery pack while driving, which provides an effective fuel economy of nearly 100 miles per gallon (MPG) of reformulated gasoline! This is based on GM’s anticipation that the series hybrid owner will plug the vehicle in overnight while parked in the garage (grid charging), leaving in the morning with the HEV batteries fully charged. Operating as an HEV only (no grid charging), the hybrid obtains 60 MPG highway and provides a 350 mile driving range. When the generator is running, tailpipe emissions are one half of California’s stringent ultra low emission levels (ULEV). The very high power to energy ratio GM Ovonic NiMH battery provides ample power for acceleration (zero to 60 MPH in nine seconds) and offers a zero emission, EV only, driving range of 40 miles, significantly more than other HEV battery types can provide.”
I would like to see you produce a ’sports coupe’ four door, that would be comparable to the CLS 500 and the (soon to be ?) Porsche Panamera.
I have seen your announcements on an additional model, is it to be announced soon?
## W. Heath wrote on January 23rd, 2007 at 7:59 am
## This quote is from GM-Ovonics in 1998:
## “A more significant problem is the Power to Energy ratio of the small parallel HEV battery pack.
## For the larger Volt battery pack in Li-ion or NiMH this is not a problem, but for a vehicle like the Prius,
## it puts severe limits on how much braking or downhill energy the battery pack can absorb.
Keep in mind that Ovonics/Cobasys eventually started preventing others (like Panasonic/Toyota) from selling large format, large capacity NiMH packs for vehicle use. Toyota couldn’t continue to make and sell a pure EV (like the Rav4-EV) in the USA anymore using NiMH batteries. They were basically backed into a corner and their only option was hybrid using a small NiMH pack.
Now Li-Ion is set to upstage NiMH, and so (as far as I know) the manufacturers are free to use larger packs, or even full EVs without restriction from those Cobasys patents. I suspect that Toyota will soon switch to Li-Ion for their hybrids, and the pack sizes could be much larger.
www.electrifyingtimes.com/goodtoyota-badtoyota.html
www.evworld.com/blogs/index.cfm?page=blogentry&authorid=12&blogid=83&archive=1
Hopefully, Cobasys doesn’t take over the best Li-Ion tech and prevent it from being used in EVs…
www.greencarcongress.com/2007/01/cobasys_and_a12.html
The quick-charge issue has been discussed since the first days of this blog, and the more I think about it, the more I become convinced that building a network of quick-charge stations across the country is not a teriffically good idea. Instead, electrical storage systems need to be designed modularly, so that “filling up” amounts to swapping out depleted units and swapping in charged ones, which have been charged at more leisurely rates, as home-wiring might be able to deliver. The modules need to be relatively inexpensive, re-usable over a great many recharge cycles, and fairly light in weight. Obviously, the Roadster won’t benefit from such modularity, at least in its first several model years, but perhaps the Whitestar and future vehicles can.
With a modular electrical storage system, vehicle owners could keep one or more modules at home, being charged at all times. On long trips, they could simply swap out depleted modules for charged ones at gas stations, kwik-e-marts, and other points of distribution. The distribution “network” could facilitate recycling. The modular ESS system could include diagnostic software to verify the condition of a module before the customer accepts and drives away with it. (The distributors would have similar verification equipment, to ensure that they weren’t fooled into accepting a dead or damaged module as good.)
Although this may sound a little bit complicated, the logistics seem much more reasonable, and more immediately feasible, than building a network of quick-charge stations, including the problem of high-voltage/high-current couplers, heavy-duty insulation, and other issues that one normally faces at power substations — which is pretty much what a quick-charge station would have to be.
## David wrote on January 23rd, 2007 at 12:39 am
## TEG - While normaly I would totaly agree with you in regard to the implausibility of a quick charge,
## in the case of EESTOR I would take pause.
Hey! I never said it was implausible. I was just pointing out that it looked like someone told EEstor that Tesla doubted them which may not be true.
## Kcops wrote on January 22nd, 2007 at 9:45 pm
## To TEG- I e-mailed Weir of EEstor back at the time & explained it wasn’t Tesla saying this-but Anatoly & some others.
Great, thanks.
By the way, I personally have no idea if what EEstor (or others) are suggesting will be real or not. I sure hope it turns out to be true because we definately could use better electricity storage technology!
Anatoly is right that the industry is littered with false hopes that failed to live up to expectations and hype.
On the other hand, history is filled with doubters that were proved wrong by great inventions.
Thanks Anatoly for your explanation about volumetric energy density of chemical reactions. I concede that ferroelectric materials by definition exhibit nonlinear polarization, ie relative permittivity ε is a function of field strength and shows saturation and hysteresis. By the way hysteresis implies energy loss (conversion into heat) during charging/uncharging. However, in my understanding, atomic field strength is exceeded at precisely breakdown field strength: At this point, electrons are ripped from molecules (would you then call it a plasma in solids too?), shortening the two electrodes of the capacitor. In fact, you can try at home by rubbing some insulators and create the classic electrostatic charge on cloths, plastics etc.
Emosson, www.nap.edu/openbook.php?record_id=10595&page=48 cites ε=5000 and breakdown at 5 MV/m for BaTiO3. That’s not terribly far off of EEstor’s claims (18,000 and 500 MV/m resp), but how knows?
For true EVs I find manufacturing cost and energy density the two most important advantages (if they materialize) of supercapacitors above current Li-ion batteries. The idea of fast charging doesn’t make sense for the electrical grid. Let’s leave the idea of service stations behind — you can better refill your EV at home, while you sleep. (Series) Hybrids may need unlimited life cycles and high power density.
Anyhow I’m sure Tesla Motors will take advantage of any new electric storage technology as it matures.
Future electric vehicles will all use electric generators inplace of large heavy battery packs. Why store electricity in large heavy battery
packs when it can be generated on the spot saving 900lbs of dead weight. For those who do not think
that this can be done I would suggest you check the “Arotech Company Electric Fuel website”. They run everything from Cars to
buses on electric generators and do not use batteries at all.
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Editor’s comment: You might be interested in Martin’s blog, Hybrids, Plug-in or Otherwise.
Update on global warming:
news.yahoo.com/s/ap/20070123/ap_on_re_us/warming_climate_report
This confirms the importance of what Tesla Motors is doing for the environment. Keep it up!
“David Kosowsky wrote on January 17th, 2007 at 9:37 pm
Let’s see” $500M… hmmm… should we give it away in the hopes that the handful of recipients will develop a product for a market that barely exists or do we incentivize that market to grow. That could be a $5,000 tax rebate for 100,000 vehicles. Additionally, redirect $500M from hydrogen development and setup realistic electricity storage device development contests.”
… or you could give away 5,000 $100,000 Tesla Roadsters for that… or subsidize $50,000 off the cost of existing technology for 10,000 cars.
and what happened to the 80MPG car that Al Gore promised us in 1992? wasn’t that $500,000,000 given to GM/Ford/Chrysler at the time? I don’t see any 80MPG cars on the road… they must not have been produced…
Brian Hague
Detroit and the big 3 have many serious problems that are very similar with other large mature US corporations. They have an aging workforce with great union contracts with medical benefits we all would die for, like government workers. These legacy costs of pensions and medical benefits hurt us in the global ecconomy. I have run an operation in France and these legacy costs are paid for by the government, not the companies, thus allowing all to partiscipate in the programs benefits and cost equally. Obviously these benefits are paid for by high taxes, but one may argue we have high taxes in the US also.
This is a much bigger issue than companies being competitive, it is the countries being competitive and how they provide for their citizens. We as a country need to compete which in turn will make all companies competitive in the global market. The US has to change its thinking of we are the king, to how do we compete in this new world. New creative ideas have always been our strength as a county, this idea of a fast electric car fits that model.
Regarding ‘bean counters’ running the operations we can see that in many industries. As the public companies strive to meet the quarterly results short term decisions are made. The only way to make long term value is with long term decisions regardless of the short term pressures. This is what I call the ‘bean counter’ mentality, not all accounting people have that mentality and this is what separates the good companies from the bad.
I have consulted to private equity venture capitalists that have a similar short term thinking trying to show value to sell the company. It still comes to the leadership of a company to choose the long hard path of long term thinking to change the market. That is key to a successful implementation of a great idea. It is not a quick path to true value.
Mitsubishi Li-Ion plans:
www.greencarcongress.com/2007/01/report_mitsubis.html
“…Mitsubishi Heavy Industries Ltd. (MHI) plans to produce lithium-ion batteries for electric and hybrid cars and market them to automakers worldwide by 2010…
…The prismatic cells for the stationary application use lithium manganese oxide, and are 270 Wh-class, with energy density of 160 Wh/kg and an expected cycle life of 3,500….”
Love your ideas , love your car , I already know friends that are going to buy it. Can’t wait for it to be ready for a larger scale market , I’m buying one when i can get a test drive as well . GM and ford should go kiss the [reference deleted] oil money ring , they have nothing to do with american pride , just future failure .
Freddy wrote “..Of course, if you know anything about caps you know that the discharge curve is a decreasing exponential. Once the voltage falls to 1/2 the max voltage, you only have 25% of capacity left. To use this residual 25% energy, the current would increase to unacceptable high levels so for practical purposes, the usable capacity is 112 KW*hr.”
The first statement is true see graph at www.plasticlabels.ca/index_files/compareEVbatteries.htm but the second statement is not because the voltage is still higher than required by the motor. Almost all of the power would be available. One half of 3500 volts is 1750, the Tesla motor requires only 377. EEStor’s capacitor would deliver full power to the motor until it drops below 377 volts at the same current as used by the battery system in place now.
Anatoly is wrong on two points-science people are definitely trusted (at least by those who went to college) and his opinion obviously carries a halibut lot more weight than the avg. ” non-physics Phd.” Joe. I thought physics was interesting-at least I could get a handle on it (but I only took 3 quarters in college). Chemistry on the other hand…!!- Stuff of night mares. But some people have just got it-I knew a physics major in school who “never studied”-started studying at like 3 a.m. after partying all night. He had the highest GPA in the school, I heard. This is why I never got into science-or engineering-there are some hep quasi- genius- like cats in those rackets. Anatoly has a point-it’s not good that EEstor doesn’t mention that they know about the effect he talks about. Guess we’ll know the EEstor story pretty soon - like Dick Weir said : “it will be interesting”, one way or another! -while we’re waiting : “Draft Gore ‘08″
EVstudy, an excellent presentation, but an additional consideration is the marginal or incremental cost of supplying power to EV’s vs an equivalent ICE vehicle. My calculations are that an efficient EV, like the Tesla, would be cheaper to operate than a comparable ICE vehicle, even with a power rate of 60 cents per kwh, with Gas @ $3.00 a gallon. Even the most expensive Green Energy Solar Power runs 12-50 cents per kwh, depending on location. Therefore the incremental cost of adding 100% Green Energy to the Grid is still much cheaper to the consumer than running on gasoline. And USA gasoline prices are much lower than most places in the world, and that price is almost certain to rise sharply, while the price for Green Energy is steadily falling. Another consideration, is the inherent efficiency and economic advantage to power producers of running their plants and the utility company’s grids at a higher (and more efficient) level at night, when most EV’s will be charged, and other consumption is low. It is an economic fact that to maximize return on investment a plant or infrastructure must be run at 100% of capacity 7 days of the week / 24 hrs per day. Reduced costs imply more investment available for green energy production.producers of running their plants and the utility companies grids at a higher (and more efficient) level at night, when most EV’s will be charged, and other consumption is low. It is an economic fact that to maximize return on investment a plant or infrastructure must be run at 100% of capacity 7 days of the week / 24 hrs per day. Reduced costs imply more investment available for green energy production.
Sorry about my screwup on the last post, the last part should have read:
A more significant problem is the Power to Energy ratio of the small parallel HEV battery pack. For the larger Volt battery pack in Li-ion or NiMH this is not a problem, but for a vehicle like the Prius, it puts severe limits on how much braking or downhill energy the battery pack can absorb.
GM already developed a perfectly functioning Plugin Series Hybrid, based on the EV1, 10 years ago. This quote is from GM-Ovonics in 1998:
“GM’s series hybrid (using an electric motor to drive the front wheels) uses a compact micro gas turbine generator system to charge the GM Ovonic NiMH HEV battery pack while driving, which provides an effective fuel economy of nearly 100 miles per gallon (MPG) of reformulated gasoline! This is based on GM’s anticipation that the series hybrid owner will plug the vehicle in overnight while parked in the garage (grid charging), leaving in the morning with the HEV batteries fully charged. Operating as an HEV only (no grid charging), the hybrid obtains 60 MPG highway and provides a 350 mile driving range. When the generator is running, tailpipe emissions are one half of California’s stringent ultra low emission levels (ULEV). The very high power to energy ratio GM Ovonic NiMH battery provides ample power for acceleration (zero to 60 MPH in nine seconds) and offers a zero emission, EV only, driving range of 40 miles, significantly more than other HEV battery types can provide.”
EEStor - is it a breakthrough? A scam? Cold Fusion redux? Heck if I know, but it makes a great techie detective (de-tech-tive, perhaps?) serial, doesn’t it?
Here’s another interesting wrinkle in the story. Go to www.sedar.com, search their database for ‘Feel Good Cars’ (the old name for ZENN), and you’ll find the annual report from last month for ZENN Motors. Sorry I can’t provide a direct link, as the site has an anti-webcrawler security feature.
Pop down to the section on EEStor (page 11). This details the business agreement between ZENN and EEStor. There you’ll find that EEStor has given exclusive rights to ZENN for just about all of the automobile market (why? They didn’t get much money for it). There is, however, one exception, and I quote:
“The exclusivity does not include high-performance sports cars with a drive system of 100 kW (continuous output) or greater”
Why would EEStor ask for that exclusion? It’s not like anyone’s building a high-performance electric sports car like that… Gasp!
Re. Daryl comment- yeah, two problems are stockholders & boards of directors/ceo’s paying themselves absurd amounts-like the guy who ran Home Depot until recently (that got me shopping exclusively at Lowe’s). In the end, if all else fails, they bail out with their golden parachutes. This is basically a white-collar criminal system if you ask me. But then again, when two guys sell “You Tube” to Google,after about 18 months, for billions that’s nuts as well. However one good thing is that when some of these dot.com/tech. millionaires make cash they tend to use some of it well-like the Tesla founders, Paul Allen, Gates, etc. Enough of these guys doing the right things with their money could change the country (”no stockholders/ good old boards” req’d” but ” batteries included”, in some cases). If a lot of these current/future guys would follow the credo of the Google guys (Do no evil, and beyond that do good) then we’re talkin’.
from what i have seen and read you have wonderful technology. When are you going to mass produce this to the average person at an affordable plrice? Will you be at the next Toronto auto show? Are you planning to open a manufacturing center in Toronto or Ontario? Do you have any other models, like 4 door sedans? [Contact details deleted]
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Editor’s Answer: Take a look at our future plans.
Milesautomotive updated their web site, now they have different photos of the XM200 and XS500 (Sports sedans) coming from the Javlon division:
www.milesautomotive.com/showroom_xs200.php
www.edmunds.com/insideline/do/News/articleId=119247
I got a kick out of the comment, “My guess is that all the bright minds behind the EV-1 don’t work at GM anymore.” Who’s that guy heading up AC Propulsion again…? lol. Come on… you knew that.
Regarding EV quick recharging, I was thinking, what if every home had a Plugin Hybrid sized battery or ultra-capacitor bank of about 10 kwh, and an Online Inverter of 25 to 50 kw (about 10% to 50% of the EV or HEV’s Inverter). This battery bank would then provide a quick recharge for PHEV’s and about a quick 25% (50 mile) recharge of EV’s. Now the typical household average grid energy requirement is 1-2 kw, that is 4 to 9 amps @ 240 vac. As such each home would only need a feeble #16 cable to tap into the utility, instead of a heavy 2/0 cable and a large transformer tied to a 4,160 volt to 13.8 kv utility distribution feed. This would create a revolutionary change in the way we use, distribute and produce energy. Gone would be the days of major power blackouts, brownouts and fears of terrorist or environmental disaster caused power failures. This distributed energy system of course would inevitably lead to distributed energy production, in particular CHP (Combined Heat & Power). Home solar stations of modest size, or home or neighborhood windmills, and home natural gas fed microCHP furnace/hot water/power generators, which could be small 1.5 kw natural gas fed fuel cells (not like your 15-50 kw automotive hydrogen fed fuel cell) or stirling engines or even small diesel engines with heat exchangers.
Regarding public EV charging stations. They could be like the home ones mentioned above or they could be just 15a/120vac or 30a/240vac plugin chargers, which would be typically a 9 or a 36 miles per hour of charge, station. Not suitable for a filling station type charging station. They would be very simple units though and could be made to look like parking meters, and could easily be installed anywhere, like on street parking spaces, restaurants, shopping plazas and motels. Actually some northern countries have parking meter like plugins for vehicles in the winter for the electric engine block heaters. These might be more an emergency recharge to get you home if you miscalculated your energy requirements for the day – stop at a restaurant, have a meal while your vehicle recharges. Or for long trips the motel type overnight recharge station would be most suitable.
Actually, I think it would be better to have a 1-2 kw synchronizing invertor connected to the utility, and a 25-50 kw regular invertor to supply household power needs.
To Anatoliy Moskalev:
Anatoly, have you ever tried to estimate APCT items feasibilty for EV and HEV? It is in Google Tech Talks
November 13, 2006. Details can be found ecologyenergy.blogspot.com/2007/01/energy-crisis-management-new-technology.html
Concerning the idea of having a second battery pack at home to quick charge the Roadster’s pack, this has been discussed before in previous blog entries. I actually like the idea a lot, for all the reasons mentioned in the latest post, but of course, the packs must then either be very cheap or very hardy. As a homeowner, you probably don’t want to have to replace the electrical “accumulator” more than once every 20 or 30 years. Right now, ESSs will need to be replaced every five years or so — at considerable expense, we are told. Maybe an ultracapacitor-based accumulator would better address long-term domestic use, sooner than advances in battery technology.
I am going to save my money in order to buy the 3rd model to be offered by
Tesla Motors, along with the Solar Power-Charge System to install on my
rooftop. You guys are going to absolutely change the face of everyday
transportation the world over! The fact that your products will substantially
reduce dependence on imported oil the world over, will lessen the threat
of war, as well as hasten the day when terrorists will not be financed by
certain oil producing nations anymore!
I salute your forward-thinking philosophy, and wish your company the
very best!
Also, I can picture a day when your systems will be employed for water
transportation systems which are recharged each day with solar energy.
I see energy-storage on a worldwide scale at formally inaccessible sights
which can provide the life-blood of small villages by providing power to
pump clean potable water,light shelters,etc.
Your advanced technology,together with the solar re-charging system
will make such a tremendous difference in so many places the world over!
I wish you God speed!
I am an enthusiastic follower of Tesla, and a committeed buyer of White Star when it debuts. But it’s essential that interior head room and leg room be spacious and generous. I am 6′7″ tall. I barely squeeze into a Prius so I could never buy one. The Hybrid Camry is a little tight on leg room. If the BMW 5 series is a reference model for White Star, that’s good. It’s got good interior dimensions. Please keep space in mind. I would feel terrible if you produced a great, ground breaking, wonderful car that I couldn’t fit in. Your technology is dazzling. Now make sure the basic dimensions are really comfortable. Fancy is unimportant. Head room and leg room are essential.
I love your company, the vision, the product, etc… etc… I drive a BMW 5 series that I CANNOT WAIT to trade in for a White Star. I do enjoy the maintenance philosphy of BMW, though, very curious how that will pan out with Tesla.
I work in artist management, pretty closely with a lot of celbrities. If you need any Hollywood-types (musicians/actors/directors?) to help with your product in any way, please look me up. I’d love to help get the word out. I know a lot of them are already on board — I can’t tell you how many meetings are sidetracked by the big Tesla conversation!
Please give us just a little bit more info on the White Star…
Boy, this is exciting! I do worry that a consortium of gasmobile manufacturers and purveyors of motor oil, antifreeze, carburetors, spark plugs, exhaust systems, igniton components, etc. will conspire to make barriers to the advent of the electric car by legislation or whatever it takes. Count me in on any needed campaign to keep the true message alive and the media and politicians informed and corrected when needed. I’d like to see an allwheel drive Civic-sized car available someday. Just keep moving!
Gordon Julian, Bozeman, MT
Electric or Fuel Cell is the way to go for cars of the now and future. But with the existing problems in Fuel Cells Electric is definitley to way for the cars of the current generation.
I only hope TESLA motors, can/will have the corporate integrity to stay away from the payroll of the big corporations.
Keep it up TESLA!!!
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Editor’s comment: You might be interested in our whitepaper, The 21st Century Car.
Thank you Tesla Motors, the best invention in century! I wish that somebody here in Australia would have guts to do the same. Our prime minister John Howard has no view for the future!
Our car factories GMH Holden & Ford have not build one hybrid car , or even try at anything like you lot. Driving petrol guslers and complaining about price of petrol, that is the way we are going in this country. I wish you were here! Cheers James Marincic
I’ve been watching your progress for over a year now, and I can’t being to explain how exciting it is to think that despite big oil and Detroit, this company has it right with regard to using electricity rather than just another consumable commodity. I don’t think you realize how popular White Star is going to be, even in areas where you don’t have a physical presence. I live in the Dallas-Fort Worth area, and am hoping that by 2009 you’ll have a service center either here, or Houston, or Austin. I thiink you’d find Austin to be the most hospitable as far as incentives go. I know you guys are busy and bubbling with passion, but keep us posted on your continued successes!!
“Okay so far… Now, let’s make a smaller, 40-mile pack. The lifetime range of this pack is only 500 X 40 = 20,000 miles! To get the same lifetime range, a Chevy Volt with a 40-mile driving range would need batteries that are roughly six times as good (3,000 cycles) as those in the Tesla Roadster. Not coincidentally, the GM spokespeople say that they will launch the Volt when they can get 3,000 to 4,000 cycles out of their battery system.”
It is fairly obvious that GM is trying to reduce the cost/size of Volt’s battery pack. Perhaps scrapping the engine and spend the money on the proper sized battery would balance the cost equation.
Charlie
I just came across this via the BBC UK website.
As an observer I have to state that it seems extremely apparant that this is one big hoax that has sucked in few untruistic yet naive investors.
They have worked on this since about 2000, go into production this year yet have no working prototypes.
You have to admire them though for just putting enough information out to keep people believing. I am sure it might happen some time in the next 50 years but not from these people.
If it was true they would now have billion dollar backing and prototypes woulld have been out in 2002!!!!!!!!!!!!!!!!
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Editor’s surprise: Are you referring to the Tesla Roadster? We have many working prototypes. Check out our latest video of recent safety tests and some of the “first looks” from major media outlets on our Media page.
I’m a few months late to the fray, but here’s my $0.02:
I think comparing a Tesla to the Volt is an apple to oranges comparison. They are very different vehicles aimed at very different market segments and price ranges. The only thing they have in common is that they are both an attempt to market grid-powered, battery-centric cars to the general public.
Additionally,
“battery technology that is good enough for the Tesla Roadster is, in fact, not good enough for the Chevy Volt. Not even close.”
Soooo…in other words GM is pushing its small, research-oriented contractors/entrepeneurs (remind you of anyone?) to push past any mental or technological boundaries, and develop the next generation of automotive batteries that are inherently safe and long-lasting.
And….WHY is this a bad thing? And isn’t it something that Tesla could be doing as well?
Minus the continued hydrogen references, I don’t see anything wrong with what GM is doing.
-A
September 10, 2007
More than a tip
My Texas family is handling Toyota today with its gas & electric stuffs. I told the Mrs. I’m getting into real estate -but my 1942 Chrysler New Yorker (that is off the books if you believe in DMV) is how I plan to sell here in Vallejo (considered its own country by koo-koos). I got family with PG&E and all things point to me not to trust anyone. What I would like is a bolt on “motor” for this heavy “car”. I haven’t weighed it -I don’t have a “scale” and can’t credit an original scale manufacture (now) here in OUR (now) network. Anyways, Pep boys, Auto zone sell motors for automobiles but what I would like is an ALL electric self recharging DRIVING MACHINE motor.
O.k.
TJ Remlinger
where can people can buy your car and where can you see this car
enjoy your enlightening feedback letters on auto technology and where you are taking tesla motors. (tesla what a great name)wish your car could attend all auto shows , even if it were just a hologram. hoping our country will get off the oil addiction someday. when is your song coming out for name recognition. go tesla go tesla go
I am old school in every way, except when it comes to car’s. I truely believe in the saying “Build it a they will come”. Im 46 years old, have four daughters, four grandchildren, and I pray that electric cars will become affordable before I die! I grew up in the era of muscle cars, owned at least a half dozen or more, but in this day and age even a high school educated, middle aged man like me, can see the forrest thru the trees. I would like to see cars built with bio-deisel generators powering electric motors, and charging bateries, like the new trains being produced today. This, in my opinion, could provide affordable, high milage cars for the general population, with production lines and tecnology availible today! I may be a simple man, but Im not alone, something has to be done. I have alot of respect for anyone willing to advance technology for the good of the people, and the future, hopefully sooner than later.
Mr. Anatoly Moskalev,
In your critique of EESTOR’s technology above, you stated that EESTOR has failed to address the problem of “dialectric saturation”.
Just this week a new EESTOR Patent application came to light. The Patent is for the entire EESTOR prcoess of silk screen printing the capacitors which EESTOR are claiming to be “game changing”. I have quoted the following from the Patent application. The most important part is at the end:
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“The following data indicates the relativity permittivity of ten single-coated composition-modified barium titanate powder batches. Batches Relativity Permittivity @ 85° C 1. 19,901 2. 19,889 3. 19,878 4. 19,867 5. 19,834 6. 19,855 7. 19,873 8. 19,856 9. 19,845 10. 19,809
Average relativity permittivity = 19,861
The following data indicates the relativity permittivity of ten components measured at 85° C, then 85° C and 3500 V, and the last test 85° C and 5000 V. Components 850 C 85° C - 3500 V 85° C - 5000 V 1. 19,871 19,841 19,820 2. 19,895 19,866 19,848 3. 19,868 19,835 19,815 4. 19,845 19,818 19,801 5. 19,881 19,849 19,827 6. 19,856 19,828 19,806 7. 19,874 19,832 19,821 8. 19,869 19,836 19,824 9. 19,854 19,824 19,808 10. 19,877 19,841 19,814 Average K 19,869 19,837 19,818 Results indicates that the composition-modified barium titanate powder that has been coated with 100 A Of AUO3, immersed into a matrix of PET plastic, and has been polarized provides a dielectric saturation that is above the 5000 V limit and the relative permittivity is highly insensitive to both voltage and temperature.
Leakage current of ten EESUs that contain 31,351 components each and having the capability of storing 52.22 kW»h of electrical energy measured at 85° C and 3500 V. EESU Leakage Current - μA 1. 4.22 2. 4.13 3. 4.34 4. 4.46 5. 4.18 6. 4.25 7. 4.31 8. 4.48 9. 4.22 10. 4.35
Average leakage current 4.28
Voltage breakdown of ten components with and average dielectric thickness of 9.81 μm measured at a temperature of 85° C. Component Voltage Breakdown — 106 V/cm 1. 5.48 2. 5.75 3. 5.39 4. 5.44 5. 5.36 6. 5.63 7. 5.77 8. 5.37 9. 5.64 10. 5.88
Average voltage breakdown 5.57
Full charge/discharge cycles of a component from 3500 V to 0 V at 85° C. After each 100,000 cycles the leakage current was recorded. The leakage current was multiplied by 31 ,351 to reflect the full EESU value. The rise time on the charging voltage was 0.5 seconds and the discharge time was 1.0 seconds. The RC time constant was 0.11 seconds for both the charging and the discharging times. The voltage breakdown was tested at the end of 106 cycles and was measured at 85° C with the results being 5.82 x 106 V/cm and the total capacitance was measured at 30.85 F. The final test data indicates that the full cycle testing did not degrade the total capacitance, leakage, or voltage breakdown capabilities of the component.”
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Any comments would be appreciated. There’s alot more in the Patent Application. You may view it in its entirey here:
www.wipo.int/pctdb/en/fetch.jsp?SEARCH_IA=US2005028970&DBSELECT=PCT&ABIMAGE=09032006%2FUS2005028970_09032006_gz_en.x4&C=10&TOTAL=18&IDB=0&TYPE_FIELD=256&SERVER_TYPE=19-10&ELEMENT_SET=B&START=1&SORT=41231903-KEY&QUERY=%28IN%2Fweir+AND+IN%2Frichard%29+&RESULT=5&DISP=25&FORM=SEP-0%2FHITNUM%2CB-ENG%2CDP%2CMC%2CAN%2CPA%2CABSUM-ENG&IDOC=1324301&IA=US2005028970&LANG=ENG&DISPLAY=DESC
Why was my question to Anatoly Moskalev re: EESTOR’s newly discovered Patent application wherein EESTOR published test data as to Dialectric Saturation removed from this blog?
Is there more to this blog or What Happened?