4 ms·
> For the average person, the batteries need to be recharged at least at a similar rate and range to filling a gas tank. The top Model S can charge at 250 kW,
by hwillis 7y ago
> For the average person, the batteries need to be recharged at least at a similar rate and range to filling a gas tank.
The top Model S can charge at 250 kW, or 15.4 miles or range per minute. Theoretically the fastest gas pumps in the US (10 gal/min) do 250 miles per minute (fleet average for new cars), but in practice you really mean a 5 minute fill-up, so ~75 miles per minute. Not that it's any faster to plug in a charger than insert a pump, but <5 minutes is basically irrelevant. So currently the best commercial electric cars are losing by ~5x.
A 5 minute fill up means charging at ~12-13 C. Hybrid cells regularly do 10+ C[1]. The batteries in F1 cars charge or discharge 3 times per minute[2], on average. It will not be long until full size BEVs can do 5 minute charges. The much bigger problem is actually getting the power to charge them; big charger-side batteries are expensive.
[1]: https://www.greencarcongress.com/2014/09/20140915-s500phev.html https://www.greencarcongress.com/2014/09/20140915-s500phev.h...
[2]: https://www.mercedes-amg-hpp.com/formula-1-engine-facts/ https://www.mercedes-amg-hpp.com/formula-1-engine-facts/