Electrical energy storage device and manufacturing method thereof

摘要

Disclosed is an electrical energy storage device provided with 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, including 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.

主权项

1. A method for manufacturing 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 method comprising:
(a) preparing a subject for welding by contacting an inner terminal with a plate-like member provided on at least one of the first terminal and the second terminal; (b) aligning the subject with a beam radiating unit of a laser welding machine to radiate a laser beam on the boundary between the plate-like member and the inner terminal; and (c) performing laser welding on the boundary along the outer periphery of the subject while moving any one of the subject and the beam radiating unit relative to the other.