Laser cutting device of power battery pole piece

Abstract

The invention relates to a laser cutting device, in particular to an optical fiber laser cutting device for a vehicle power battery pole piece, which comprises a worktable. The worktable is sequentially provided with a discharging mechanism, a conveying mechanism and a cutting mechanism, wherein a battery pole piece is arranged on the discharging mechanism, conveyed by the conveying mechanism and cut by the cutting mechanism, and a cutting head of the cutting mechanism is an optical fiber laser cutting head. By the technical scheme, the invention cuts the battery pole piece by adopting optical fiber laser, finely cuts the battery pole piece by utilizing the properties of laser, i.e. the beam quality approaching a diffraction limit, the conversion efficiency with high energy and the high stability, cuts a pole piece with narrow cutting gap, smooth cutting edge and high accuracy, favorably improves the performance of the battery pole piece and overcomes the defects of a traditional cutting method.

Description

technical field [0001] The invention relates to a laser cutting device, in particular to an optical fiber laser cutting device used for pole pieces of automobile power batteries. Background technique [0002] The cutting method of the traditional power battery pole piece is to uniformly coat the positive and negative electrode materials on both sides of copper foil (negative electrode) and aluminum foil (positive electrode), respectively, and then cut the pole piece into a specific shape by cutting equipment. At present, the cutting equipment for power battery pole pieces used in the pilot test lines of some domestic battery manufacturers and electric vehicle manufacturers are mostly punching and rolling cutting equipment. When using punching and rolling cutting equipment to cut battery pole pieces, cutting There are many burrs on the pole pieces (especially the negative pole piece), poor precision, and severe powder drop off at the trimming edge, which seriously affects the...

AI Technical Summary

Problems solved by technology

At present, the cutting equipment for power battery pole pieces used by some domestic battery manufacturers and pilot lines of electric vehicle manufacturers is mostly punching and rolling cutting equipment. When using punching and rolling cutting equipment to cut battery pole pieces, cutting There are many burrs on the pole pieces (especially the negative pole piece), poor precision, and serious powder drop off the edge, which seriously affects the application of power battery pole pieces.

In addition, the dies in these two cutting devices need to be replaced frequently, which is not conducive to large-scale connection production, and also increases the maintenance cost in the later period

These shortcomings limit the production and application of automotive power batteries, and a new cutting equipment is needed to replace it

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