Light Duty Technology Cost Analysis, Power - US Environmental ...

The BECM (Figure D-83) is responsible for managing both current flow via the Bussed
Electrical Center (BEC), and battery health via the Battery Pack Sensor Module (BPSM). The
BECM monitors the cooling air inlet temperature and controls the cooling fan for the batteries.
High Speed CAN (HS CAN) was employed to communicate with various modules, including the
BPSM, Transmission Control Module (TCM), Powertrain Control Module (PCM), and DC-DC
Converter Module.
Figure D-83: The Battery Energy Control Module (BECM)
The BPSM (Figure D-84), as its name implies, monitors various voltage and temperature
sensors on the battery packs. It also monitors the charging system and BEC.
Communication with the BECM and other key powertrain modules are via HS CAN.
Figure D-84: Battery Pack Sensor Module (BPSM)
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