Patent ID: 6264708
Filing Date: 2001-07-24
Classification: B23K,H01M,Y02E,Y10T

Abstract:
A method of manufacturing a prismatic battery comprising:inserting power generating elements into a prismatic case formed as a rectangular tube having a bottom and a tube end surface defining a rectangular opening including four sides and curved corners of a prescribed radius;abutting a sealing plate to the tube end surface defining the rectangular opening of the prismatic case;directing at least one laser beam from a lateral direction of the prismatic case to an abutment line where the tube end surface of the prismatic case and the sealing plate are abutted to each other; andmoving the at least one laser beam, relative to the prismatic case, linearly along a direction parallel to the sides such that the prismatic case and the sealing plate are laser welded together, wherein the at least one laser beam is inclined at a prescribed angle with respect to said sealing plate to provide a melt depth extending toward a center of a thickness of said sealing plate.