Patent ID: 7333315
Filing Date: 2008-02-19
Classification: H01M,H02J,Y02E

Abstract:
1. A secondary battery device comprising an accumulator, multiple protective circuits, and a first and a second output terminals, in which device: each of the protective circuits includes two fuses connected in series to form a series circuit, the series circuits of the two fuses are connected to each other in parallel, and when an external circuit is connected to the first and second output terminals, a discharging current supplied from the accumulator to the external circuit and a charging current supplied from the external circuit to the accumulator flow through the two fuses of each of the series circuits; wherein each of the protective circuits includes a heater, and one end of each heater is connected to a junction between the two fuses, one end of a rectifier element is connected to the other end of each heater, the other end of each of the rectifier elements is connected to a switch element, and when the switch element is turned on, a current flows through each of the rectifier elements, the heater of each of the protective circuits and the switch element which is turned on.