Patent ID: 8822053
Filing Date: 2014-09-02
Classification: H01M,Y02E,Y02P

Abstract:
1. An electrical energy storage device comprising an electrode winding body, which includes a positive electrode generating electrons by oxidation and reduction, a negative electrode for absorbing the generated electrons, and separation layers for physically separating the negative electrode from the positive electrode, which are sequentially wound around a winding core, and an electrolyte provided between the positive electrode and the negative electrode, the electrical energy storage device comprising: a terminal plate for external connection connected to the electrode winding body; a cylindrical can for accommodating the electrode winding body connected to the terminal plate; a ring-shaped sealing member for closing a first opening formed in the can, wherein the sealing member comprises a first vent part having a first vent hole and integrally formed in the center of at least one side of the sealing member, and a second vent part having a second vent hole and integrally formed in the center of the other side of the sealing member; and the electrical energy storage device further comprising a conductive interconnecting member of electrically connecting the terminal plate and the electrical winding body and the interconnecting member comprises a second opening including two semicircular strips and opened to both sides, the second opening being formed on the same line as the first and second vent holes such that gas in the electrode winding body passes through the first and second vent holes.