Battery cover plate laser welding process for replacing side edge welding with underside welding

Abstract

The invention discloses a battery cover plate laser welding process for replacing side edge welding with underside welding and belongs to battery cover plate welding processes. The battery cover platelaser welding process involves a battery shell with the upper end being open, and the upper end opening of the battery shell is provided with a step-shaped spigot; and the upper end opening of the battery shell is covered with a battery cover plate, the peripheral edge of the battery cover plate is in a step shape, and the upper surface of the battery cover plate is flush with the upper end faceof the battery shell. The battery cover plate laser welding process further includes the following steps that A, the battery cover plate is pressed into the upper end opening of the battery shell, andthe step-shaped edge of the battery cover plate is closely attached to the step-shaped spigot of the battery shell; and B, lasers are made to run one circle along a connecting joint between the edgeof the battery cover plate and the battery shell, and welding is completed. According to the battery cover plate laser welding process, the structure is simple, and the whole machine structure is simplified; and operation is convenient, a weld seam is formed at a time, the time required for welding the battery cover plate is greatly shortened, the cover plate is welded more conveniently and rapidly, production efficiency is improved, and application prospects are good.

Description

technical field [0001] The invention relates to a welding process for a battery cover plate, in particular to a laser welding process for a battery cover plate in which top welding is used instead of side welding. Background technique [0002] Since the successful development of lithium-ion batteries in the 20th century, due to a series of advantages such as high specific energy, long cycle life, and environmental friendliness, especially with the continuous maturity of new materials and technologies in this field, lithium-ion batteries are used in power, energy storage, etc. Applications in large-scale fields continue to spread. The traditional lithium-ion battery cover welding process is side welding. The battery case is fixed on a rotatable workbench, and the laser performs single-line linear welding. Through the rotation of the workbench, the welding work on the four sides of the battery cover is completed in sequence. Welding is finished in four times, and the working ...

AI Technical Summary

Problems solved by technology

The traditional lithium-ion battery cover welding process is side welding. The battery case is fixed on a rotatable workbench, and the laser performs single-line linear welding. Through the rotation of the workbench, the welding work on the four sides of the battery cover is completed in sequence. The welding is completed in four times, which requires a long working time and the work efficiency is not high

Images