Patent ID: 8765300
Filing Date: 2014-07-01
Classification: H01M,Y02E,Y10T

Abstract:
1. A method of manufacturing a battery having an electrode module that includes: a positive plate including a cathode collector portion formed by attaching a lead member to a cathode substrate made of a foamed metal plate; and a cathode collector plate welded to the cathode collector portion of the positive plate, the method comprising: forming a pre-welding positive plate, which is the positive plate before welding, such that the pre-welding positive plate has a projection projecting from a pre-welding cathode collector portion, which is the cathode collector portion before welding; and melting a pre-welding cathode collector plate, which is to be made the cathode collector plate by welding, so as to weld the pre-welding cathode collector plate to the projection, wherein a circumferential length of the projection is equal to or shorter than 1.3 times a width of the projection.