Patent ID: 8133602
Filing Date: 2012-03-13
Classification: H01M,Y02E,Y02P

Abstract:
1. A cap assembly of a rechargeable battery comprising: a sub plate; a vent plate that contacts the sub plate and that separates from the sub plate under a predetermined pressure condition; and an arc interrupter including an interrupting member that moves into a position between the vent plate and the sub plate when the vent plate separates from the sub plate wherein the vent plate includes a protruding portion that contacts the sub plate and that separates from the sub plate under a predetermined pressure condition of the rechargeable battery, and wherein the arc interrupter further includes a driving member connected to the interrupting member to move the interrupting member into a position between the protruding portion of the vent plate and the sub plate when the protruding portion of the vent plate separates from the sub plate; and wherein the driving member includes a material that changes shape according to temperature such that the driving member transmits a biasing force to the interrupting member when the temperature of the driving member exceeds a predetermined temperature.