HYBRID BATTERY SYSTEM SYSTEM DESCRIPTION

BATTERY SMART UNIT CONTROL

• The battery smart unit converts the HV battery condition signals (voltage, current, and temperature), which are needed to determine the charging or discharging values that are calculated by the hybrid vehicle control ECU assembly into digital signals, and transmits them to the hybrid vehicle control ECU assembly via serial communication.

• A leakage detection circuit is provided in the battery smart unit in order to detect any leakage from the HV battery. Furthermore, the battery smart unit detects the voltage of the cooling fan, which is needed by the hybrid vehicle control ECU assembly to effect cooling fan control. The battery smart unit also converts these signals into digital signals and transmits them to the hybrid vehicle control ECU assembly via serial communication.