Patent ID: 8663837
Filing Date: 2014-03-04
Classification: H01M,Y02E

Abstract:
1. A secondary battery, comprising: an electrode assembly in which a cathode plate and an anode plate are arranged with a separator being interposed therebetween; a case in which the electrode assembly is received; a cap assembly capable of sealing an open end of the case; a gasket interposed between the case and the cap assembly; and a first leakage prevention portion comprising a protrusion part formed at a surface of the gasket and a counter protrusion part formed at a surface of the cap assembly and contacted with the protrusion part of the gasket, the counter protrusion part having a barb at the end thereof pierced into the gasket by clamping between the gasket and the cap assembly, such that the counter protrusion part is closely engaged with the protrusion part.