The battery management system controlling temperatures is key. My BMW i3-REx is liquid cooled/heated but our Prius Prime is only cabin air cooled and heated like the Leaf.
In two winters and two summers, the Prius Prime air cooled battery has had problems that I can reduce but not eliminate. For example, below 50F, there are operating modes that will start the gas engine. I quickly park and power-on restart the car back into EV mode but this has been disappointing. But we learned early on that the original, NiMH battery Prius suffered thermal management problems leading to failures.
Hopefully I'll have only liquid cooled/heated battery cars in a month or two.
Bob Wilson
In two winters and two summers, the Prius Prime air cooled battery has had problems that I can reduce but not eliminate. For example, below 50F, there are operating modes that will start the gas engine. I quickly park and power-on restart the car back into EV mode but this has been disappointing. But we learned early on that the original, NiMH battery Prius suffered thermal management problems leading to failures.
Hopefully I'll have only liquid cooled/heated battery cars in a month or two.
Bob Wilson