| 摘要 |
PURPOSE:To avoid such an accident beforehand as a load not operated in case of emergency by providing a current detecting device which detects a current while trickle charging is being conducted and a controller which cuts off a charging circuit when the value of that current exceeds a prescribed one. CONSTITUTION:An enclosed type lead storage cell 3 is always in the state of charging by a trickle charger 2. On the other hand, recovery charging should be conducted after the enclosed type lead storage cell 3 is connected to a load 4 is case of emergency. A controller 5 has a timer which counts a time in order to put the controller in operation 10 hours after recovery charging is started by estimating a time required for a current to be transferred in constant voltage range and stabilized, because that recovery charging is rendered a constant charging in 0.2 CA control. If a test continues under this condition, a negative plate is oxidized by inversion of air so that a current starts to increase to reduce the plate, and when its value reaches 0.09 CA, a trickle lifetime evaluation device 1 is operated, a circuit is cutoff and the lifetime of the enclosed type lead storage cell 3 is indicated. Accordingly, such an accident, as a load not operated in case of emergency can be avoided beforehand. |
