Rates2c

Rates2c

Rates2c

Here is what I have learned from my research:

6831 cells - 69 parallel/99 series
18650/2,2Ah Li-ion cells (18 mm in diameter and 650 mm long)
375V/151Ah/53kWh
450 kg/992 lb
Liquid cooled/heated

A conventional 18650 cell weights ~45 gram. 45 g * 6831 cells = 307 kg
So "only" 300 kg out of 450 kg ESS are cells.

The most 18650 cells that I'm aware of have poor discharge rates (2C or less) and a poor cycle life (500 cycles or less). The Cycle life is probably extended due to the very good BMS and cooling/heating system but the discharge rate is a misery for me.

The Roadster motor generates 215kW peak at the output shaft. That means that the inverter pulls 575 Amp from the pack, even if we imagine a perfect situation where the 375 pack voltage won't drop (what it does in real life) and that there are no looses from the cells to the motor output shaft. That would be almost 4C for every cell. I guess that 5,5-6C is more realistic in real life.

We also know that each cell is double fused. This also sounds a little strange.