Drive Motor Generator Battery Cooling Description

Drive Motor Generator Battery Cooling Description

Drive Motor Generator Battery Cooling Description

The drive motor generator battery temperature is controlled by the coolant cooler assembly also referred to as the thermal management system (TMS). The liquid cooling system within the battery pack assembly consists of two strings connected in series flow, with eleven modules in each string connected in parallel flow in to a coolant manifold. The (TMS) components include a drive motor battery coolant fan, drive motor battery coolant pump and closed loop radiator, and is serviced as an assembly. The drive motor battery coolant fan and the drive motor battery coolant pump are located inside the drive motor generator battery assembly and controlled by the drive motor generator battery control module. The drive motor generator battery control module monitors four hybrid battery temperature sensors, one air inlet temperature sensor, and a coolant temperature sensor. The drive motor generator battery control module uses this information to control the temperature of the drive motor generator battery assembly to a consent temperature for longer battery life and acceptable state of charge for maximum performance. These temperature sensors are internal to the drive motor generator battery assembly. The drive motor battery coolant fan speed is determined by (SDGM) through the vehicle communication circuit. The resistances of these temperature sensors decrease with temperature.

The generator battery thermal system is self contained within the enclosure and is maintenance free. The system is designed to operate at a lifetime average inlet air temperature of 25°C (77°F).