On 1/25/20 9:16 PM, Eric Greenwell wrote:
Emir Sherbi wrote on 1/25/2020 8:07 PM:
When you have so much battery capacity. You have a lot power to spare
(discharging or charging). If they use the full capacity in two hours
without counting the reserve the rate of discharge is 0,5C. And the
chare rate is 1C. That is not much workload for most of the popular
cells. But you need a extremely big super charger.

Yes, for example, some of the Teslas can "take about 20 minutes to
charge to 50%, 40 minutes to charge to 80%, and 75 minutes to 100% on
the original 85 kWh Model S".


For fast charging, a Tesla 3 does an intelligent preheat if you're
driving to a supercharger station, then uses active liquid cooling to
keep the temps from getting too high. Pipistrel is adding liquid
cooling to their batteries also.

A 1C charge rate for the Alice would be about a megawatt, which would
require a considerable investment in infrastructure.

If Eviation has all this figured out, it begs the question why they just
burned up a prototype of a $4 million dollar airplane with a battery
fire. They have stated the prototype is "intact", which appears to be a
highly creative use of the term.