[jjaredsimpson]

To charge an 85 kWh in 5 minutes would be ~1MW which seems beyond home charging capacity.

Even more out of reach if you want to double the capacity

[lazyjones]

> To charge an 85 kWh in 5 minutes would be ~1MW which seems beyond home charging capacity

It would be pointless to attempt this directly from the grid, but IMHO charging a home battery slowly and using that to charge a car quickly when needed, will become practical soon. The grid would only need to provide as much power per time as you could spend driving your 1-2 cars, so perhaps 50-100KW.

[im3w1l]

If, let's say 95% of energy goes into the battery, and 5% becomes heat - what would the cooling system need to look like?

[pjc50]

5% of 1MW is obviously 20kW. That's rougly comparable to the "large" 68000BTU/hour space heaters.

On the other hand, it's well within the range of a conventional car engine cooling system: http://what-when-how.com/automobile/forced-circulation-water...

It depends somewhat on how hot the hot side can afford to get. The "weak link" will be getting the heat out of the cells themselves - it's no good if you can cool the exterior to 20C if the interior exceeds the safe limit of the cell.