Patent ID: 7988543
Filing Date: 2011-08-02
Classification: B60H,B60L,Y02T

Abstract:
1. A vehicle having a passenger cabin with an HVAC module and a battery module having a battery pack comprising: a recirculation/fresh air door located in the HVAC module and operable to selectively allow variable proportions of fresh air from outside the vehicle and recirculated air from inside the passenger cabin to flow there-past; a HVAC blower, located in the HVAC module, and operable to draw the air past the recirculation/fresh air door and direct the air into the passenger cabin; a HVAC module controller operatively engaging and controlling a position of the recirculation/fresh air door and a speed of the HVAC blower; a battery pack air inlet configured to direct the air from the passenger cabin into the battery pack; a battery pack blower, located in the battery module, and operable to draw in the air through the battery pack air inlet; and a battery pack controller, operative to control a speed of the battery pack blower, and in communication with the HVAC module controller; and wherein the HVAC module controller and the battery pack controller are configured to operate the HVAC blower at a first speed to provide a desired amount air flow to the passenger cabin from the HVAC module to provide one of heating and cooling the passenger cabin; reduce the HVAC blower to a second speed that is less than the first speed; and increase a speed of the battery pack blower at essentially the same time as the HVAC blower speed is reduced to the second speed in order to maintain a desired amount of air flow to the passenger cabin from the HVAC module.