Patent ID: 8815441
Filing Date: 2014-08-26
Classification: H01M,Y02E,Y02P

Abstract:
1. A secondary battery, comprising: an electrode assembly generating electricity and comprising a first electrode tab and a second electrode tab; a can for accommodating the electrode assembly, the can having an open top; and a cap assembly sealing the open top of the can, the cap assembly comprising an insulating case, the insulating case comprising a body part that comprises an upper surface that is substantially parallel to the open top of the can and two opposite major side surfaces, the insulating case comprising a plurality of tab drawing grooves including a first tab drawing groove through which the first electrode tab is drawn and at least one of second tab drawing grooves through which the first electrode tab is not drawn, at least one of the two opposite major side surfaces comprising multiple tab drawing grooves, and a tab drawing hole through which the second electrode tab is drawn, wherein the size of each of the tab drawing grooves is related to that of the first electrode tab such that the side surfaces of the first tab drawing grooves surround the side surfaces of the first electrode tab, wherein the insulating case includes a support portion formed on the body part, the support portion includes a major side support portion that is formed on an edge of the body part closer to either one of the two opposite major side surfaces than another edge of the body part, and wherein the major side support portion is disposed on the at least one of the two opposite major side surfaces comprising multiple tab drawing grooves and between the multiple tab drawing grooves, and a side surface of the major side support portion is flush with a portion of the at least one of the two opposite major side surfaces disposed between the multiple tab drawing grooves.