Patent ID: 7939191
Filing Date: 2011-05-10
Classification: H01M,Y02E,Y02P

Abstract:
1. A rechargeable battery, comprising: a bare cell comprising, a protective circuit board comprising an electrical terminal arranged horizontally and parallel to the cap plate on a surface of the protective circuit board; and a current interruption device arranged between the cap plate and the protective circuit board, the current interruption device comprising an upper electrode arranged horizontally, a body to sense heat and interrupt current, and a lower electrode arranged horizontally, wherein the lower electrode is connected to the cap plate, wherein the upper electrode and an electrode terminal of the cap assembly are electrically coupled with the electrical terminal of the protective circuit board, wherein both ends of the lower electrode extend beyond edges of other parts of the current interruption device and act as a terminal for welding, and wherein the upper electrode is thicker than the lower electrode.