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Comment Re:Still a ways to go (Score 1) 131

There's already the ZEBRA battery, used in a few EVs since 2007. I think insulation isn't such a big problem when the batteries are large as there's a fair bit of thermal mass. The threshold for the ZEBRA is somewhere upwards of 20 kWh but that would depend on the shape.

The Tesla Model S which used a flat, relatively thin pack on the floor of the vehicle would definitely be a challenge.

Comment Re:Still a ways to go (Score 4, Interesting) 131

Have a look at molten-air batteries - http://phys.org/news/2013-09-m...

With an iron anode, the energy content is roughly the same as petrol - ~ 10000 watt-hours per liter. But the most you can hope for an a straight gasoline ICE is about 30%, whereas a battery is likely to be 2.5x as efficient. A carbon anode, which is more likely to be developed is nearly double that of iron so if this tech pans out and it looks to be quite affordable, it'll kill the demand for fossil fuels in almost all light-duty vehicles and make it possible to have hybrid long-haul trucks.

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