A pole piece cutting manufacturing process for lithium-ion pouch battery

Abstract

The name of the present invention is a pole piece cutting manufacturing process for lithium-ion pouch batteries. The invention belongs to the technical field of manufacturing lithium-ion soft pack batteries. It mainly solves the problems of sharp points and burrs on the cutting edges of the existing lithium-ion pouch battery pole pieces. Its main features are: including a die-cutting machine, a positive pole fillet mold, a negative pole bevel mold, a positive pole lug mold and a negative pole lug mold; After being cut by the positive pole fillet mold station, rounded corners are formed at four right angles; the rounded corners on both sides of the positive pole piece are asymmetrical; the negative pole piece is cut by the front negative pole lug mold station to form positive pole lugs Afterwards, it is cut by the rear negative electrode fillet mold station to form obtuse angles at four right angles; the bevels on both sides of the negative pole piece are asymmetrical structures. The invention improves the quality and stability of the battery, at the same time, reduces the difficulty of punching the pole piece cutting die, and greatly improves the service life of the pole piece cutting die.

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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