Lithium battery tab metal foil welding mechanism and welding method

Abstract

The invention discloses a lithium battery tab metal foil welding mechanism and welding method. The welding mechanism comprises a welding part and a welding protection part; the welding part comprisesa base (1), a guide column (2), a guide plate (3), a pressing power system (4), an upper welding head (5), a lower welding head (6) and an energization system. The lithium battery tab metal foil welding mechanism has the advantages that auxiliary structures are few, the use of the auxiliary structures comprising a protection piece, a connecting piece and the like in the welding process is reduced,no dust is generated in the welding process of metal materials comprising lithium battery tab metal foil, spurious welding and blasting phenomena during laser welding of multilayer metal foil are reduced, an anti-oxidation protection function in the welding process of the metal materials comprising the lithium battery tab metal foil is good, the welding process is simplified, the welding efficiency and yield are improved, the production efficiency is improved, and the production cost is reduced.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a lithium battery tab metal foil welding mechanism and welding method. Background technique [0002] In the actual production of lithium batteries, in many cases, the generation of dust should be avoided when the foil of the lithium battery tab is welded, and the metal foil should be tightly compacted. However, at present, dust is generated during the welding process of the metal foil, and there is air between the metals, so the welding area of ​​the metal foil cannot be completely compacted, and the foil is easily damaged. This is not conducive to reducing the reject rate of subsequent processes, and cannot improve production efficiency, thereby increasing the cost. [0003] At the same time, direct laser welding of multi-layer metal foils will cause false welding and explosion, which will affect the welding effect, and the foils will be easily oxidized during the welding proc...

AI Technical Summary

Problems solved by technology

At present, dust will be generated during the welding process of metal foil, and there is air between the metals, which cannot completely compact the welding area of ​​metal foil, and it is easy to cause damage to the foil

This is not conducive to reducing the scrap rate of subsequent processes, and cannot improve production efficiency, thereby increasing costs

[0003] At the same time, direct laser welding of multi-layer metal foils will cause false welding and explosion, which will affect the welding effect, and the foils will be easily oxidized during the welding process.

The existing multi-layer metal foil welding process requires protective sheets and connecting sheets, but the use of protective sheets and connecting sheets is not conducive to the plasma cleaning of the welding area by the plasma cleaning machine after welding, and the welding area is not closed, which will easily lead to foil damage. Oxidized

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