A 3 Ah LFP cell is charged to 100% at 25°C temperature. What happenes if I cool down the charged cell to -20 °C temperature? At -20 °C the cell can store only 2 Ah. Does it mean, the cell is overcharged by 1 Ah, equivalent to 30 %? Is there a risk that the cell will explode?
I assume, that this cell would be protected by the BMS in a battery configuration, if the overcharge causes an overvoltage. In this case, the BMS should dissipate the 1 Ah overcharge in order to not exceed the max cell voltage.