Patent ID: 9064641
Filing Date: 2015-06-23
Classification: B23K,H01G,Y02E,Y02T

Abstract:
1. An electrical energy storage device including a metallic casing to receive a bare cell and first and second terminals located outside of the metallic casing corresponding to each electrode of the bare cell, the electrical energy storage device comprising: a plate-like member provided on at least one of the first and second terminals; an inner terminal contacting the plate-like member to form the boundary between the inner terminal and the plate-like member; and a laser welded portion formed along the boundary between the inner terminal and the plate-like member to connect the plate-like member with the inner terminal; wherein the laser welded portion is made up of a plurality of welding points repeatedly formed along the boundary between the plate-like member and the inner terminal, and a distance between the centers of adjacent welding points is within the diameter of the welding points.