Patent ID: 9174265
Filing Date: 2015-11-03
Classification: B21D,H01M,Y02E,Y02P,Y10T

Abstract:
1. A rechargeable battery, comprising: an electrode assembly formed by depositing/spiral-winding a positive electrode and a negative electrode on respective surfaces of a separator; a can including a pipe having a side seam portion to enclose the electrode assembly and a bottom plate bonded to a first opening of the pipe by a bottom seam portion to close and seal the first opening and facing an end portion of the electrode assembly, said pipe includes a pair of narrow surfaces facing each other and a pair of wide surfaces facing each other, said narrow surfaces have a shorter width than said wide surfaces, the electrode assembly includes a plane portion facing the pair of wide surfaces, and a convex portion facing the pair of narrow surfaces, said pipe having a bent portion attached directly to said side seam portion; a cap assembly bonded to a second opening of the pipe formed at the other side of the bottom plate to close and seal the second opening; and a plurality of inserting members consisting of four inserting members inserted into spaces formed between a corner vertically connecting the wide surface and the narrow surface of the pipe and the convex portion of the electrode assembly, each of the plurality of inserting members includes a concave portion entirely in direct contact with a portion of the convex portion of the electrode assembly, each of the plurality of inserting members includes a first plane portion in direct contact with the narrow surface of the pipe, and each of the plurality of inserting members includes a second plane in direct contact with the wide surface of the pipe, said concave portion shape has a concave shape and said convex portion has a convex shape, no space, void or cavity exists between the pipe and the electrode assembly, the plurality of inserting members is in direct physical contact with solely said separator of the electrode assembly and not in contact with the positive or negative electrode of the electrode assembly, wherein solely one of the four inserting portions consists of first and second sub-plane portions, said second sub-plane portion is in direct contact with solely the wide surface of the pipe and the first sub-plane is in direct contact with solely the bent portion of the pipe, the first and second sub-plane portions form a step that has a same shape, depth and width as the bent portion, said bent portion inserts into said step.