Tesla battery modules are liquid cooled and heated. I'm experimenting with two radiators, one on each side of the bus, and may fit another large radiator over the motor if required. Please see four posts above for photos of the wooden mockups we made (I hope to have real radiators here next week).
Leaf batteries are about half as energy dense and therefore deliver half the range today for the same weight and size battery. However, they do have the advantage that they require no cooling, simple heating (just resistive heating pads), and are one third the cost
Vauxhall Ampera batteries are also popular for conversions today.
Should be a fun drive