Patent ID: 9054393
Filing Date: 2015-06-09
Classification: B23K,H01M,Y02E,Y02P,Y10T

Abstract:
1. A method of manufacturing a secondary battery comprising: forming a plurality of grooves by laser irradiation in a predetermined region surrounding a periphery of a pouring hole of a container in which an electrolyte has been poured, the plurality of grooves being parallel to an outer edge of the pouring hole; placing a sealing lid on the formed plurality of grooves in such a manner as to close the pouring hole; and fixing the placed sealing lid to the container by laser welding, wherein the grooves are formed such that each upper part between the grooves is sharp, the sealing lid is placed on upper parts between the formed grooves, and an under surface of the placed sealing lid is welded to one of the upper parts between the formed grooves.