I see your point Richard, however I can’t see a company like Porsche marketing a car with that charging capacity if they hadn’t done extensive research and testing, my leaf is only a 50kwh charge capacity, I think, it’s never worried me as I don’t use chademo chargers on it very often, the Hyundai Kona I have uses CCS and that can pull up to 100 kWh I’ve seen 70 odd when I’ve charged it on CCS when the battery is low but the battery management systems are very good at scaling the charge back as the battery fills, so I assume
/have learnt that these are safeguards the Auto makers build in to protect the batteries longevity.
Someone commented that 350 kWh was dangerous, I’d rather be stood next to a Porsche charging at that rate than a petrol car being fuelled by someone smoking,and yes I have seen it!
350kW is a huge amount of power but not anymore dangerous providing the infrastructure to handle it safely is there. As you suggest EV manufacturers wouldn't be considering these higher charge rate standards if safety wasn't maintained. Nevertheless I think it's naive to assume that higher charge rates won't impact on battery longevity. A battery even partially depleted is a power hungry device until it approaches its full capacity. You simply can't scale back charge rates
and expect to re-charge batteries in super quick time.
I believe the current Tesla 150kW superchargers work at 480 volts DC which keeps the current down. Even then that represents over 300 amps max which requires welding cable size amounts of copper in the charge cable to handle such. The 350kW+ superchargers in the pipeline will require huge charge cables unless they are planned to service cars with even higher voltage battery packs.
