Burr-free ultra-speed cutting method of battery pole piece and ultra-speed cutting machine

Abstract

The invention relates to a battery pole piece burr-free overspeed segmentation method and an overspeed segmentation machine. The method includes: (1) placing a battery pole piece on a battery pole piece support member and making movement in a same direction at a predetermined speed; (2) disposing at least one cutting disc on one side of the battery pole piece, wherein the cutting disc comprises a cutting disc main body and a disc blade on the outer edge of the cutting disc main body, the disc blade has two inclined surfaces that incline in opposite directions, and a disc blade mouth is formed at the juncture of the two inclined surfaces; and (3) driving the cutting disc to rotate, making the linear speed of the disc blade mouth greater than the moving linear speed of the battery pole piece, and making the rotating cutting disc segment the battery pole piece through the disc blade mouth. The method and the overspeed segmentation machine provided by the invention have no influence on the performance of the anode or cathode material on the battery pole piece, and no burr is formed on the section of the pole piece metal body.

Description

technical field [0001] The invention relates to a burr-free ultra-speed cutting method and an ultra-speed cutting machine for a battery pole piece capable of cutting the battery pole piece. Background technique [0002] Lithium batteries are widely used in mobile communication devices and portable electronic devices because of their advantages such as high energy density, high output power, long cycle life, and no environmental pollution. In the production process of lithium batteries, the cutting of battery pole pieces is a very important process. Only after the rolled battery pole pieces are cut, can they be wound with separators to form batteries. The most common method of cutting the pole piece is to cut the pole piece by the upper and lower cutters. The principle is to cut the metal substrate of the battery pole piece (usually copper foil) or aluminum foil), this method has high production efficiency, but this method of cutting the pole piece is easy to cause problems ...

AI Technical Summary

Problems solved by technology

However, in actual use of this fiber laser cutting device, due to the high temperature of fiber laser cutting, the positive or negative electrode materials on both sides of the narrow slit of the pole piece are denatured, resulting in the resistance between the battery pole piece and the current collector. If it is too large, the battery will heat up easily during use, creating a new safety hazard; in addition, fiber laser cutting will burn the positive or negative electrode materials, and generate powder at the work site, causing secondary pollution, which is harmful to the health of workers working on site. Influence; Due to the influence of the above-mentioned various unfavorable factors, at present, fiber laser cutting devices are difficult to promote in the battery pole piece cutting industry, and some have even used fiber laser cutting devices. The factory plans to replace other pole piece cutting equipment to replace Fiber laser cutting device

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