BMU – Battery Management Unit

The BMU is a bridge between the CMUs and the vehicle communication bus.

It controls the pre-charge and main contactors of the battery pack as well as collating the telemetry data from the nodes and providing a summary to other components on the vehicle CAN bus.

BMU Specifications

• Communications: CAN bus to both batteries and vehicle
• Contactor Drive: 3x 12V 3A, with feedback
• Precharge: Resistive (includes fault detection)
• Isolation Rating: 1kV DC
• Dimensions: 195 x 55 x 30mm
• Mass: 150g
• Environmental: No enclosure — coated PCB