Pole piece cutting manufacturing process of lithium-ion soft-packed battery

Abstract

The invention relates to a pole piece cutting manufacturing process of a lithium-ion soft-packed battery, and belongs to the technical field of manufacturing of lithium-ion soft-packed batteries. Thepole piece cutting manufacturing process is mainly used for solving problems of sharp points and burrs generated during edge cutting of existing lithium-ion soft-packed battery pole pieces. The process is main characterized by comprising a die-cutting machine, a positive pole fillet angle mold, a negative pole bevel angle mold, a positive pole lead mold and a negative pole lead mold. After being cut at a station of the front positive pole lead mold to form a positive pole lead, a positive pole piece is then cut at a station of the rear positive pole fillet angle mold, so that fillet angles areformed at the four right angles; the fillet angles at the two sides of the positive pole piece are of an asymmetric structure; after being cut at a station of the front negative pole lead mold to form a positive pole lead, a negative pole piece is then cut at a station of the rear negative pole billet angle mold, so that bevel angles which are obtuse are formed at the four right angles; the bevelangles at the two sides of the negative pole piece are of an asymmetric structure. By means of the pole piece cutting manufacturing process, the punching difficulty of a pole piece cutting mold is lowered while the quality and stability of a battery are improved, and thus the service life of the pole piece cutting mold is greatly prolonged.

Description

technical field [0001] The invention belongs to the technical field of manufacturing lithium-ion soft pack batteries. In particular, it relates to a pole piece cutting manufacturing process for a lithium-ion pouch battery. Background technique [0002] At present, soft-pack lithium batteries are favored by people because of their high energy density, good rate performance, no memory effect, and safety and environmental protection. They have become the main mobile power products for human beings, and the market usage is still increasing. As we all know, the pole piece manufacturing process of soft-packed lithium batteries is a key process in the production process. The sharp points and burrs of the pole piece can easily pierce the diaphragm, resulting in a short circuit of the battery, causing the battery to catch fire and explode, so the manufacturing process is extremely strict. . [0003] The current mainstream pole piece cutting manufacturing process mainly uses a singl...

AI Technical Summary

Problems solved by technology

[0003] The current mainstream pole piece cutting manufacturing process mainly uses a single-station cutting mold and a cutting knife to punch the pole piece. After cutting the pole piece, four sharp points will be formed at the four corners. In the subsequent formation and Risk of puncturing the separator during the pressurized test, which could cause a short circuit accident in the battery

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