Patent ID: 8709626
Filing Date: 2014-04-29
Classification: H01M,Y02E

Abstract:
1. An apparatus for preventing overcharge of a battery, comprising: a cell module in which cells are stacked and a plurality of cells are connected through a plurality of electrode terminals that are connected electrically and mechanically to the plurality of cells; a fixing rod disposed between the cells; a plurality of pressure plates, at least one of which is installed on the fixing rod, in which a first end is located to be adjacent to the connection part of an electrode terminal of the plurality of electrode terminals and the cell and a second end is located on the center part of the cell to separate the connection of the electrode terminal and the cell by see-saw-rotating around the fixing rod when the cell is expanded; and an elastic member disposed on a side of the second end of the pressure plate to provide elastic force to the pressure plate, wherein the pressure plate is see-saw-rotated when the cell is expanded over a predetermined pressure, wherein the plurality of cells are arranged to face each other, a first end and a second end of the electrode terminal are connected to ends of the respective cells respectively, the plurality of pressure plates are installed on opposite sides of the fixing rod to be rotatable in a see-saw-rotated manner respectively, wherein sides of first ends of the pressure plates are adjacent to the connection part of the cell and first end and second end of the electrode terminal respectively, and the elastic member is installed between two pressure plates of the plurality of pressure plates.