Dust removal and slag removal mechanism for lithium battery laser welding

Abstract

The invention discloses a dust removal and slag removal mechanism for lithium battery laser welding. The dust removal and slag removal mechanism comprises a tab transferring mechanism, a welding head pressing mechanism, a welding slag removing mechanism and a welding slag collecting box. The welding head pressing mechanism is mounted on the tab transferring mechanism and is provided with a left station and a right station, namely a slag removal station positioned at the left side and a welding station positioned at the right side; the welding slag removing mechanism is mounted above the slag removal station, and the welding slag collecting box is arranged below the slag removal station; the tab transferring mechanism is arranged below the welding station; and the welding head pressing mechanism is provided with a welding pressing head capable of moving left and right, and the welding pressing head is provided with a laser passing hole for laser welding. The mechanism can effectively prevent molten materials from splashing everywhere, has an adsorption and dust removal function, and can remove smoke dust in time; the laser passing hole of the welding pressing head is subjected to slag removal treatment, so that the welding quality of the welding pressing head is prevented from being influenced due to excessive deposition of welding slag; and the welding pressing head is cooled, so that the problem that tab glue is melted due to over-high temperature of the pressing head can be avoided.

Description

technical field [0001] The invention relates to the technical field of lithium battery welding, in particular to a dust and slag removal mechanism for laser welding of lithium batteries. Background technique [0002] Dust control in the manufacturing process of lithium batteries is very important to the safety performance of lithium batteries, especially the welding slag generated during the tab welding process of laminated lithium batteries. , danger occurs, and a grain of welding slag becomes a great source of danger. During laser welding of the tabs of lithium batteries, the cell pole pieces (copper foil, aluminum foil) of the battery are melted and vaporized, and the generated particles splash on the surface of the cell diaphragm and burn or burn through the diaphragm, resulting in a short circuit. When the particles are splashed, it is easy to enter the inside of the cell, pollute the cell, and affect the performance of the cell during subsequent hot-pressing formation...

AI Technical Summary

Problems solved by technology

When there is welding slag attached to the light passing hole of the welding indenter and too much, it will affect the passing area of ​​the laser, thereby affecting the welding area

When welding the tabs of the battery core, the welding pressure head presses the tabs and the pole pieces tightly, and the heat during welding will be transferred to the welding pressure head. If the welding pressure head is overheated, the tab glue on the tabs will be melted, which will affect the tabs when the cell is packaged. Side heat seal effect

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