Patent ID: 7695835

Claim:
A battery pack, comprising: a rechargeable battery; a protective circuit module that is coupled to the rechargeable battery; a lead plate that is coupled with the rechargeable battery and the protective circuit module; and a molded portion that is formed on top of the rechargeable battery and molds the protective circuit module and the lead plate, wherein the rechargeable battery comprises an electrode assembly, a can for housing the electrode assembly and an electrolyte, and a cap assembly for sealing the can, wherein the lead plate comprises a bottom surface and a first lateral wall that extends upward from the bottom surface and has a reinforcement groove coupled to the molded portion, the first lateral wall having a bottom edge adjacent to the bottom surface and a top edge opposite the bottom edge, the reinforcement groove being spaced apart from the bottom edge and the top edge, and wherein the first lateral wall has an end edge connected to the bottom edge and the top edge and the reinforcement groove has a rectangular shape defined by an opening in the end edge spaced apart from the bottom edge and the top edge and the reinforcement groove is bounded on three remaining sides of the rectangular shape by internal edges of the lateral wall, and the molded portion is filled in the reinforcement groove and coupled to the internal edges.