HYBRID BATTERY SYSTEM SYSTEM DESCRIPTION

The battery voltage sensor 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 power management control ECU into digital signals, and transmits them to the power management control ECU via serial communication.

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