Module, Battery Pack Control (BPCM): Operation

The Battery Pack Control Module (BPCM) is contained within the High Voltage Battery Pack. The BPCM is utilized to provide battery management and system functionality in conjunction with the Cell Supervision Circuits (CSCs) which is also located within the High Voltage Battery Pack. The CSCs monitor and balance the individual battery cells and communicate cell voltage and temperature information to the BPCM via a CAN communication bus internal to the battery pack. The BPCM communicates with the vehicle via CAN-C and various input signals.

The main functions of the BPCM are as follows:

• High voltage bus pre-charge contactor control
• Battery pack current sensing
• Battery Pack voltage sensing
• Isolation breakdown detection between the high voltage system and vehicle chassis
• CAN communication
• Fault detection and reporting
• High Voltage Interlock (HVIL) power source