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Aluminium air battery that runs on old soda cans

just a thought, ive heard that aluminium is an energy intesive non ferrous metal to create,thus making the aluminum air battery not so viable, so why not have some sort of way to re-use aluminium cans in an aluminium air battery? imagine starting to get low on power and pulling over on your journey, throwing back a few redbulls, then putting the empty cans into you "mr fusion style" reactor in the frunk of your model s! back to the future style lol ! recharge yours and your cars batteries at the same time. -stuey

Hi Stuey,
here are some numbers from Metalectrique:

Our aluminium-air bench demonstrator (full size cell array for G-Wiz platform - Mahindra Reva) ran at full power for 10.5 hrs average (5 repeat tests) using 0.5mm thick aluminium anode plate. For the G-Wiz that's equivalent to 500 miles. However, the power pack design has a 1.5mm anode which means that we'll probably get nearer 1500 miles. The full-cycle cost per mile of this system is 9p/mile. Current SMMT cpm is 17p and DOE(US) is 12p. Powerpack energy is 294kWh, mass is 200kg which is a saving of 70kg. Our power pack design is modular and can be hand swapped. System power is 22.6kW which is much more than the original 13kW battery pack fitted to the G-Wiz.

I know the model S is not a Mahindra Reva but we can scale this into one of Elon's power packs.

Trevor;
Sounds like it's coming together. Good work, good luck!

@stuey81 - While aluminum is difficult to "create" (mine), but it's very easy to recycle.

http://en.wikipedia.org/wiki/Aluminum#Production_and_refinement

Aluminium is theoretically 100% recyclable without any loss of its natural qualities. ...snip... Recovery of the metal via recycling has become an important use of the aluminium industry. ...snip... Recycling involves melting the scrap, a process that requires only 5% of the energy used to produce aluminium from ore, though a significant part (up to 15% of the input material) is lost as dross (ash-like oxide). The dross can undergo a further process to extract aluminium.

The aluminum in an exhausted Al-air battery is all dross. The oxygen must be split/driven off, which costs at least as much energy as it produced when the battery was drawn down.


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