Patent ID: 6632562
Filing Date: 2003-10-14
Classification: H01M,Y02E,Y10T

Abstract:
In a battery module wherein a plurality of cells are arranged coaxially in series and connected electrically, a cell connecting structure for coupling together two adjacent cells, each of said cells including a cylindrical cell case having an open end and a bottom surface on the other end doubling as one electrode of said cells and a sealing assembly for sealing the open end of the cylindrical cell case, comprising:a cell case of a first cell; and a sealing assembly of a second cell, said sealing assembly including an electrode plate formed with a concavity in a central portion thereof, a valve body housed in said concavity, a valve body holding plate welded to an upper peripheral edge of the concavity for sealing the concavity, a connection electrode formed in an annular shape and protruded outwards in a direction of axis of the cells at a location near an outer peripheral edge of said electrode plate, and a plurality of projections formed on said connection electrode, wherein said plurality of projections on the connecting electrode of the second cell are directly welded to the bottom surface of said cell case of the first cell.