Originally Posted by mmarshall

One of the things that I don't totally understand on full-electrics is how they keep the insides of the motors and transmissions cool without radiators, coolant-lines, and circulation. Yes, air can circulate on the outside, but you obviously can't have any holes in the engine or transmission for cooling for air to get inside, because it would also allow moisture, water, and other things that would short out the electrics....especially driving through very heavy rain or deep puddles. I can see where this would be an especially significant issue on Teslas, because of the enormous amount of power that the relatively small electric motors produce for their size.

Originally Posted by Lexus2000

The electric motor/generator in a Toyota hybrid is liquid cooled along with the electronics. It's not difficult or complicated it works essentially the same way as a liquid CPU cooler, sealed transfer plate/material with circulating coolant.

Originally Posted by LexsCTJill

I believe Tesla does it with liquid. Nissan and Chevy with air. Correct?