Circuit/System Description

Each hybrid/EV battery contains 4 high voltage contactors for normal operation and regular (AC) charging, and 2 contactors for connecting multiple packs in series (if equipped). In vehicles with DC charging capability, there are two additional DC contactors that are housed in the battery charger - DC. The high voltage contactors allow the high voltage DC batteries to be connected to the vehicle or safely contain the high voltage DC within the hybrid/EV battery assembly. The high voltage contactors consist of a main positive high voltage contactor (s), main negative high voltage contactor (s), AC charge positive high voltage contactor (s), precharge contactor (s), DC positive contactor, and DC negative contactor. The contactors close and open in a specific sequence controlled by the battery energy control module 1. The battery energy control module 1 supplies voltage to the control circuit for the high voltage contactors/module. Ground is provided through the case ground and chassis.

The battery energy control module 1 measures internal voltages, currents, and temperatures within the battery charger - DC and charge receptacle and verifies they are within the proper range.