Laser welding equipment used for battery cell tab and pole piece

Abstract

The invention discloses laser welding equipment used for a battery cell tab and a pole piece. The laser welding equipment is used for welding the battery cell tab and the pole piece of a flexible-package power battery through a laser welder, and comprises a workbench, a short-circuit detecting assembly which is arranged on the workbench for performing short-circuit detection on a battery cell, a loading mechanical hand which is used for grabbing the battery cell subjected to short-circuit detection to a clamp, upper and lower reflow line assemblies which are separately arranged on the top andthe bottom of the workbench for conveying the clamp up and down in a circulating mode as well as a clamp unlocking assembly, a pre-welding assembly, a tab cutting assembly, an adapter sheet loading assembly, a welding assembly and an unloading mechanical hand which are sequentially arranged on the top of the workbench and are positioned beside the upper and lower reflow line assemblies. The laserwelding equipment solves the pseudo soldering problem in an existing pre-welding process, can obviously improve tensile strength of a tab and pole piece connecting sheet in comparison with ultrasonicwelding, and further has characteristics such as low cost relative to ultrasonic welding.

Description

【Technical field】 [0001] The invention relates to the technical field of automation equipment, in particular to a laser welding equipment for battery lugs and pole pieces. 【Background technique】 [0002] In the welding process of power battery soft-packed battery tabs, the traditional method uses ultrasonic waves to pre-weld the tabs, then cuts the tabs neatly, and then uses ultrasonic waves to weld the tabs and tabs together. In the traditional method Welding methods, because all ultrasonic welding is used, ultrasonic welding has the problem of false welding, and false welding cannot pass machine detection, only manual inspection, any optimization measures can only minimize the probability of false welding, and cannot be avoided. [0003] The power battery soft-packed battery tab and the tab connection piece are pre-welded, and laser welding is used after cutting. The tab connection piece and the tab are melted and welded together, which can solve the problem of virtual wel...

AI Technical Summary

Problems solved by technology

[0004] To sum up, the main purpose of the present invention is to solve the technical problems of the ultrasonic welding of the power battery soft-packed cell tab and the tab connection piece, such as weak welding, low strength of the tab after welding, and high cost of ultrasonic welding equipment, and provide a Laser welding equipment for battery tabs and pole pieces

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