danrjones wrote: ↑Tue Jan 25, 2022 9:55 am
V4.... which seems likely will support 800v. Now I seem to remember a tesla fan boy on here saying 800v is all a scam.
Will he/she continue to say that if and when tesla also moves to 800v?
I don't know who your 'fanboy' is but I told you that a 800v pack would not charge my Model 3 Tesla (or any EV of similar pack size any faster than 400v when the limiting factor is the C rate, and it is true. Physics are physics.
A larger pack, say one that is in a cybertruck, would benefit from a higher voltage pack because it exceeds the max Amps as it currently exists in Superchargers.
Tesla will have 150 kWh packs on the road, and 4680 cells may increase the C rate to ~ 1.8 average, 3C for short durations at low SoC.
1.8 * 150 = 270 kW
3.0 * 150 = 450 kW
A cybertruck from low SoC to perhaps 50% SoC may average 2.0C and will average 2.0 * 150 = 300 kW.
The current Supercharger peaks at 625 Amps IIRC but it may be more in the 500 Amp range sustained. That will require a 600v nominal pack. If the Supercharger can maintain 600 Amps then a 500v nominal pack would be spec'd. IIRC Tesla has spec'd Superchargers to 525v so that makes me think that the next Tesla jump will be to ~ 500v packs. But again: this is irrelevant to 80 kWh packs