Talk Morgan Forums Community Vehicle Talk (non-Morgan) Electric Cars

https://batteryuniversity.com/learn...ies_do_not_last_as_long_as_an_ev_battery[/quote]
That's an interesting article Rob in explaining why Li-ion batteries last so much longer in EV's compared to phones and laptops etc. What it doesn't touch on is charge rates though. In the common lead/acid battery still in use in our ICE cars, stress which impacts battery life is caused to some degree if the charge current exceeds as little as 10% of battery capacity in amp hours for any length of time (rate of C/10). That would be 5 amps for a typical Mog sized 50 amp hour battery, although it's longevity is also born by the fact it's never discharged more than 5% of its capacity for the first few years of its life. On my boat I choose C/3 rate as an acceptable reduction in charge time v service battery longevity.

Li-ion on the other hand can withstand much higher charge rates up to 10C being mentioned. That's a hundred times greater than ideal for lead/acid. Suggestions (from the same source) are that those batteries are also stressed above a certain charge rate though in the order of 0.8 to 1C and probably akin to typical home charging, the latter being equivalent to 100 amps for a 100 amp hour battery, as an illustration only. I wonder therefore how regular use of supercharger points (350kW! being mentioned) will impact EV battery life where charge rates will likely be higher still.
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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!