Patent ID: 7638978
Filing Date: 2009-12-29
Classification: H01M,Y02E,Y02P

Abstract:
1. A battery protection device, comprising: a thermally responsive operating plate having two plates secured together, the two plates having different coefficients of thermal expansion; an electrically conductive member; and a stopper configured to interlock with the thermally responsive operating plate, the thermally responsive operating plate, the electrically conductive member, and the stopper co-operating with each other and being arranged to cause the battery protection device to enter into: a recoverable region current cutoff state, where the thermally responsive operating plate is not interlocked with the stopper, and electrical contact and dissociation of the thermally responsive operation plate with and from the electrically conductive member is repeatedly realized; and an unrecoverable region current cutoff state, where the thermally responsive operating plate is interlocked with the stopper, and the thermally responsive operation plate is unrecoverably dissociated from the electrically conductive member.