Patent ID: 7718306
Filing Date: 2010-05-18
Classification: H01M,Y02E,Y02P

Abstract:
1. A rechargeable battery comprising; an electrode assembly comprising a positive electrode, a negative electrode, and a separator between the positive electrode and the negative electrode; a case housing the electrode assembly; a plurality of lead elements connected to the electrode assembly and protruding from the case at a sealing region of the case; and a sealant between and contacting the case and a respective one of the plurality of lead elements, the sealant having a non-fracture area having a first width extending from a first edge to a second edge of the sealant and a fracture area having a second width extending from the first edge to the second edge, wherein the first width is greater than the second width such that the fracture area has less resistance to fracture than the non-fracture area.