| 摘要 |
In this invention, the electric power generated by a fuel battery stack is discharged immediately while suppressing the production costs. This fuel battery system (1) comprises a fuel battery stack (10) for generating electric power through an electrochemical reaction while supplying the generated electric power to an electric motor for driving a car, a discharge circuit (80), and a discharge control circuit (90). Through a plurality of switching elements, the discharge circuit (80) is capable of switching the connection relationship among a plurality of resistive elements, thereby forming a plurality of discharge paths for discharging the electric power from the fuel battery stack (10). When a discharge of the electric power from the fuel battery stack (10) has been instructed, the discharge control circuit (90) forms a first discharge path in the discharge circuit (80) and starts a discharge mediated by the first discharge path, and when a detection voltage corresponding to the output voltage of the fuel battery stack (10) has become lower than a predetermined threshold voltage, the discharge control circuit (90) forms, in the discharge circuit (80), a second discharge path whereof the resistance value is smaller than the resistance value of the first discharge path, and switches the discharge mediated by the first discharge path over to a discharge mediated by the second discharge path. |
