Patent ID: 9012064
Filing Date: 2015-04-21
Classification: H01M,Y02E,Y02P

Abstract:
1. A secondary battery, comprising: an electrode assembly including a positive electrode, a negative electrode, and separators which are wound together; current collecting plates attached to the electrode assembly, each of the current collecting plates including a current collecting part and a welding part, the current collecting part and the welding part being discrete parts completely separable from each other, the current collecting part being electrically connected to the electrode assembly, and the welding part being welded to the electrode assembly and the current collecting part; a case configured to accommodate the electrode assembly and the current collecting plates; and a cap configured to cover an opening of the case and electrically connect to the current collecting plates, wherein both the welding part and the current collecting part contact the electrode assembly, and an empty space is defined between the current collecting part and an immediately adjacent welding part.