Continuous spot welding device for welding lithium battery pack and using method

Abstract

The invention discloses a continuous spot welding device for welding a lithium battery pack, and belongs to the technical field of lithium battery production. The continuous spot welding device comprises a machine frame, a spot welding machine body, a conveyor and two mounting plates, the conveyor is arranged on the machine frame and is used for conveying pole pieces and battery shells to be conveyed and conveying welded pole pieces and battery shells, the two mounting plates are horizontally arranged above the conveyor, and the spot welding machine body is arranged below the two mounting plates through a positioning assembly. A power assembly, the conveyor and a driver are arranged to be used in cooperation, a piston rod of a hydraulic cylinder extends to drive the spot welding machine body to move downwards and drive the conveyor to convey workpieces at the same time, when the piston rod of the hydraulic cylinder contracts, the piston rod of the hydraulic cylinder drives the spot welding machine body to move upwards and the conveyor does not work at the same time, therefore, continuous and intermittent welding operation of the pole pieces and the battery shells can be guaranteed, the spot welding efficiency and the spot welding precision are effectively improved, the structure is simple, and the overall mechanical linkage performance is high.

Description

technical field [0001] The invention belongs to the technical field of lithium battery production, and in particular relates to a continuous spot welding device for welding lithium battery packs and a use method thereof. Background technique [0002] Lithium batteries are a type of batteries that use lithium metal or lithium alloys as positive / negative electrode materials and use non-aqueous electrolyte solutions. Due to the very active chemical properties of lithium metal, the processing, storage and use of lithium metal have very high environmental requirements. With the development of science and technology, lithium batteries have become the mainstream. Lithium batteries can be roughly divided into two categories: lithium metal batteries and lithium ion batteries. Li-ion batteries do not contain metallic lithium and are rechargeable. Lithium metal batteries, the fifth generation of rechargeable batteries, were born in 1996, and their safety, specific capacity, self-dis...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a continuous spot welding device and method for welding lithium battery packs, to solve the problem that the existing lithium battery packs proposed in the above background technology need to weld the pole pieces on the battery case during the production process. In order to realize the connection with the inside of the battery shell, continuous spot welding cannot be carried out well when the positive electrode sheet and the negative electrode sheet are welded. Only one workpiece can be welded and a new workpiece can be placed for operation after it is removed. It cannot be continuously conveyed and welded intermittently. , low welding efficiency and imperfect functions

Images