SOC correctable power supply device for hybrid car

摘要

A power supply device of a hybrid car includes a driving battery 1 and a battery management system 2. The driving battery 1 can supply electric power to an electric motor 13 for driving the car. The battery management system 2 detects SOC of the driving battery 1, and transmits the detected SOC to the car. The battery management system 2 stores maximum SOC and minimum SOC relating to transmission of SOC to the car. When the detected SOC of the battery falls within a range between the maximum SOC and the minimum SOC, the detected SOC of the battery is transmitted to the car. When the detected SOC is not lower than the maximum SOC, the maximum SOC is transmitted to the car. When the detected SOC of the battery is not higher than the minimum SOC, the minimum SOC is transmitted to the car.