Quote:
Originally Posted by Stubby79
Said chart is for a 32 kwh battery, and shows it can do 320 km(200 miles) on what it can get in 6 minutes.
Assuming it can safely charge 80% of the battery in that time, like the other rapid-charging of lithium batteries (might even be 90%, looking at the chart's 12 minute and 30 minute charge times), 80% of 32 kw is 25.6kw.
I doubt we're at the point where you can get 7.8 miles per kwh. Or even 6.25, if it got a full 32kw.
But, assuming it could suck in 25.6kw in 6 minutes, that's 256 kw...at 375v, that's still 682 amps...and more with losses.
Hmm. That's a lotta juice. Not impossible, but pretty out there. They'd seriously need to boost the charging voltage to make it reasonable and efficient. Some day, they'll have to have EVs running at thousands of volts rather than just hundreds.
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Tesla uses <400VDC for their superchargers, but Porsche is working on an 800VDC station!
That would be more like ~340A. My calculations say that could be handled by conductors 1cm^2 for a 2m long cable. It would be awkward and bulky as anything, but possible.