Air cooling

WARNING: This page is about a different car, the 2008 GMC Yukon and 2008 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.

The drive motor generator battery is cooled by a vent fan motor. The vent fan motor and vent fan motor relay are located inside the drive motor battery assembly. B+ to the vent fan is provided from vent fan relay when the battery energy control module (BECM) supplies a ground to the relay. The battery vent fan draws the air through the batteries to cool them. There are several foam seals internal to the drive motor generator battery in order to prevent air leaks. The exhaust air exits from hybrid drive motor generator battery in the rear and is routed through a duct into the floor panel of the vehicle. The hybrid battery air inlet temperature sensor is located on the inlet air duct for the hybrid battery fan, and the battery air outlet temperature sensor is located in the air passage above the hybrid batteries. These sensors are used by the BECM to determine air flow. Refer to Drive Motor Generator Control Module Description and Operation .