Patent ID: 6174620
Filing Date: 2001-01-16
Classification: H01M,Y02E,Y10T

Abstract:
A prismatic sealed battery comprising:a metallic outer case having an opening portion and a first corner portion at an outer periphery of the opening portion;a power generating element stored within the outer case and having a positive electrode and a negative electrode opposed to each other, with a separator interposed;a metallic cover member coupled to the opening portion of the outer case, provided with a second corner portion corresponding to the first corner portion of the outer case, and welded to the outer case, with a coupled portion between the cover member and the outer case irradiated with a laser beam; andan electrode element electrically connected to the power generating element,wherein the first and second corner portions which are irradiated with the laser beam, are shaped as angular portions constituting flat faces being inclined at a predetermined angle to the periphery of the cover member, and the first and second corner portions are formed continuously with each other.