One of the "tinkerers" on this forum posted information on the cooling system back when the 3 first came out, but I don't remember the details. I sort of remember, though, that there is a relationship between the cabin conditioning system and battery conditioning system. I'll have to search for it later.Not sure how that would work. As far as I know the heating of the battery when needed occurs through warming the coolant with heat from the motor and inverter.