Seam Welding Structure Of Battery Can, Current Collecting Plate, And Cap, And Battery Cell Using Same

Abstract: This battery cell comprises a current collecting plate provided with a can connection portion that extends in an axial direction so as to be fitted into a side wall member having an inner circumference in multiple stages of different inner diameters. The battery cell is manufactured by inserting a cap into an open end portion of the can, so that the inner surface of the edge of the cap in the axial direction comes into contact with the outer side end surface of the can connection portion in the axial direction and the outer circumference of the edge of the cap comes into contact with the inner circumference of the side wall member. In addition, a triple welding portion is formed by irradiating a laser in the axial direction to a contact portion between the inner circumference of the side wall member and the outer circumference of the cap.

Patent Information

Applicants

Inventors

Specification

Documents

Application Documents