| 摘要 |
PURPOSE: To avoid the waste of battery power by driving a ventilating fan only when the battery of an assembled battery is not overcharged or not overdischarged. CONSTITUTION: When a voltage detector 3 detects that the voltage of the entire assembled battery 1 exceeds a first voltage during the charging of the battery 1 or the regenerating period of a motor 2, a fan controller 4 outputs a signal of high level. Thus, a transistor Tr and a relay 5 are turned ON to supply a voltage to a fan motor 6, and a ventilating fan exhausts hydrogen generated by overcharging out of a vehicle. Similarly, even when the voltage of the entire battery 1 drops below a second voltage, a voltage is supplied to the motor 6, and the fan exhausts the hydrogen generated by overdischarging out of the vehicle. Thus, since the hydrogen in the battery is exhausted out of the vehicle by rotating the fan only in the case of the overcharging or overdischarging, the power consumption of the battery is not wasted but the hydrogen can be efficiently exhausted. |
