Patent ID: 8993152
Filing Date: 2015-03-31
Classification: H01M,Y02E,Y02P,Y10T

Abstract:
1. A rechargeable battery, comprising: an electrode assembly including wound positive and negative electrodes with a separator therebetween; a case configured to contain the electrode assembly; a cap plate configured to seal an opening of the case, the cap plate including a terminal hole therethrough; an electrode terminal through the terminal hole of the cap plate, the electrode terminal including: a terminal through-out portion extending outwardly through the terminal hole and away from the electrode assembly, a terminal plate physically connected to the terminal through-out portion outside the case, the terminal plate including a through-out portion hole and a protruding portion on at least one side of the through-out portion hole, the terminal through-out portion penetrating through the through-out portion hole, and a fastening portion including a terminal fastening portion physically connected to the terminal plate; and a lead tab inside the case, the lead tab physically connecting the terminal through-out portion of the electrode terminal to the electrode assembly, wherein the terminal through-out portion and the terminal plate include different materials, and the terminal plate and the terminal fastening portion include a substantially same material, the substantially same material included by the terminal fastening portion and the terminal plate has a higher mechanical strength than the material of the terminal through-out portion, the terminal through-out portion includes an integral flat plate inside the case and parallel to the lead tab, an insulator separating the flat plate from the cap plate being positioned on the flat plate; and the terminal through-out portion, the terminal plate, and the fastening portion are non-integral with each other.