TLDR; Faster chargers are useful now and more of them would be great! The cells charge in parallel (there are on the order of 15,000 cells in car batteries), s

TLDR; Faster chargers are useful now and more of them would be great! The cells charge in parallel (there are on the order of 15,000 cells in car batteries), so at least right now the charger power is the constraint and not the battery chemistry. The most power you'd ever really need to deliver is maybe 3-400 miles of range in 5 minutes. So at a point, that we are pretty close to, you don't really need to charge any faster. Using Tesla as an example of our current charging constraints: The Level 1 chargers that plugin into a normal outlet are at 2 kW. In-home charging (Level 2) maxes out at about 17 kW, (close to the most the average house circuit can handle). An average gas station or retail parking lot is probably close to this. More likely it is down at 11 kW. At Super chargers, the Model 3 can currently accept a max of 120 kW, and the chargers can put out a max of 200 kW. Tesla has teased doing more, including a Megacharger for their semi's, that seems like it would work at more than 1000 kW. See https://www.teslarati.com/tesla-semi-megacharger-charging-port-close-up-look/ https://www.teslarati.com/tesla-semi-megacharger-charging-po.... And also "Super charger V3" at something more than 350 kW. Very roughly, kW is proportional to how much range you get for the amount of charge time. So 120 kW charging is about 10 times faster than 11 kW Level 2 charging. Also very roughly, a Tesla Model 3 could charge it's 300 mile (75kWh) battery in about 5 minutes at a 1000 kW charging rate. It is worth noting is that this particular need, dumping 75kWh of power in 5 minutes, will exist even as battery technology improves. Fast charging is not gating on electric cars because home and work charging works quite well. But there will be demand for fast charging as a convenience to electric car owners. Good links and details here: https://en.wikipedia.org/wiki/Tesla_Supercharger https://en.wikipedia.org/wiki/Tesla_Supercharger