Patent ID: 8535828
Filing Date: 2013-09-17
Classification: H01M,Y02E,Y02P

Abstract:
1. A rechargeable battery comprising: an electrode group comprised of a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode; a case housing the electrode group; a cap-up electrically connected with the electrode group and combined with the case wherein the cap-up comprises a girth portion formed to be continuous along its circumference and having a flat plate shape, and an external terminal protruded from the girth portion, wherein an exhaust hole is formed at the side of the external terminal; a vent plate installed below the cap-up and comprising a notch; and a plurality of disk shaped heterogeneous metallic members installed between the cap-up and the vent plate and made of a clad metal adjacent the girth portion of the cap-up wherein the plurality of disk shaped heterogeneous metallic members have a diameter smaller than the width of the girth portion, wherein a plurality of recesses are formed at the cap-up to allow the plurality of disk shaped heterogeneous metallic members to be inserted therein.