GerryAZ wrote:There are openings in the splash shield to allow air flow to the underside of the sealed battery case. There is also air flow over the top of the sealed battery case from under the hood through the "tunnel" under the console. This air flow above and below the sealed battery case is somewhat effective because I have noted battery temperatures drop a few degrees while driving on the highway after charging or being parked. I have also noted battery temperatures increase a few degrees when the car is parked after being driven on the highway.
it does seem the battery is in a wind tunnel formed by the bottom of the car, and the bellypan, that is aspirated through the grille.
I have now done a complete down to the last bolt teardown of a leaf, and have observed this duct in detail, the battery has an inch or two of space around it for the air to flow. Incidentally after this teardown i discovered the very first piece it appears they attach to the car is the firewall sound dampening insulation...
they took the trouble to seal the engine compartment and wheel wells so the grille could scoop up air to flow through the radiators, over the motor, around the battery and out the tail.
what the leaf and other ev's appear to need most is active shutters.
I have a simple foam plug I take in and out of the grille as needed to cool OR conserve heat depending on the season.
Incidentally this foam plug when installed gives me about an extra .5 miles per kwh and aerodynamically helps significantly at 70+ mph freeway speeds. At 80 mph im still about 3.5 m/kwh (with my other aeromods)!