> have a minute to plug in? Still sufficient to get from 10 to 35 percent state of charge.

Scaling that to something the size of an EV pack will require one massive cable/connector. Call it 5kw/h in 1/60 hours, thats 3000kw, at 700v thats still roughly 4000 amps. (Please correct my head math.) Charging one car could suck up more power than an entire neighbourhood. Say four or five chargers operating at once ... every roadside charging station will need its own electrical substation.

What's nice there, though, is that the total amount of _energy_ needed at a charging station is roughly fixed(), regardless of how fast you charge the cars. So if you're provisioned for the needed total energy inflow, you can to a reasonable degree compensate for having a more bursty high-rate charging load by having some amount of local energy storage as a buffer.

() - Assuming you provision for the highest-traffic-volume day. Ignoring potential induced demand of making it a little easier to drive, which I suspect is pretty bounded - people need pee and stretch breaks anyway.

Fjord ferries in Norway are up around that sort of charge rate, but for 30 mins instead of 5. That kind of battery charging performance is pure marketing until our local LV supply network is uplifted!

Like others have pointed, you have made a mistake in your computation. The currents that are required are only of hundreds of amps and the latest chargers can provide up to 1000 A.

Also like others have said, it does not matter how fast you charge a car, the total energy consumption is the same, so fast chargers do not require changes in the power supply of a charging station.

The fast chargers that enable this full charging in a few minutes have their own internal batteries, to enable them to pull only the average power from the electrical grid, not the peak power.

The new fast chargers that can achieve the times reported in TFA use a somewhat higher voltage than the older chargers, of 1000 V, to reduce the current.

> Call it 5kw/h in 1/60 hours, thats 3000kw, at 700v thats still roughly 4000 amps. (Please correct my head math.)

5 kWh * 60 = 300 kW

at 800V (typical charging voltage) that is 375A

(still huge, but an order of magnitude less)

chargers of that size generally have there own internal (sometimes even shared by multiple receptacles) batteries

substation...? more like an SMR