Patent ID: 6376120
Filing Date: 2002-04-23
Classification: H01M,Y02E

Abstract:
A current cutoff mechanism for a cell, comprising:a cell case having a power generating element held therein; a cell lid for hermetically shielding an inside of said cell case; a diaphragm section protruding toward the inside of said cell case; a terminal connected to said power generating element and having a joint portion to be joined to approximately a center of said diaphragm section; and a fixing member for fixing said terminal inside said cell case while said terminal is joined to said diaphragm section, wherein a current path is formed between said cell lid and said power generating element via said diaphragm section of said terminal, a groove portion is formed to thin a portion around said joint portion of said terminal, and said terminal is broken from said groove portion to cut off the current path when the internal pressure of said cell case exceeds a predetermined value and said diaphragm section is displaced.