Method and device for treating burrs of electrode plate of lithium battery

Abstract

The invention discloses a method and a device for treating burrs of an electrode plate of a lithium battery. The method comprises the following steps of: S1, providing a plasma etching device; S2, vertically placing the electrode plate of the lithium battery on a second electrode in a cavity of the plasma etching device; S3, pumping the cavity to reach background vacuum, and introducing reaction gas in the cavity, so that the cavity reaches a pre-set air pressure; and S4, turning on and adjusting a first radio frequency source and a second radio frequency source; forming a plasma by exciting the reaction gas in the cavity, and etching by forcing out a section of the electrode plate of the lithium battery. According to the method and device provided by the invention, the section of the electrode plate of the lithium battery is etched by using a dry plasma etching method; and the section of the electrode plate of the lithium battery is forced out by high-energy ions in a plasma in a treating process, and an etching effect is generated, so as to remove metal burrs and metal dust at the edge of the electrode plate. Therefore, the potential safety hazard of internal short circuit, caused by the burrs at the edge of the electrode plate of the lithium battery, is eliminated.

Description

technical field [0001] The invention relates to the field of post-processing of lithium battery electrode sheets, in particular to a method and device for processing burrs of lithium battery electrode sheets. Background technique [0002] Lithium-ion battery is a new type of energy storage battery developed after the 1970s. Due to its advantages of high energy, long life, low consumption, no pollution, no memory effect, small self-discharge, low internal resistance, high cost performance, and less pollution, lithium-ion batteries have shown great advantages in gradual applications and are widely used It is used in various fields such as mobile phones, notebook computers, video cameras, digital cameras, electric vehicles, energy storage, and aerospace. [0003] Lithium battery technology has developed rapidly with the needs of the society, but there are also many safety problems, such as short circuit problems, gas problems, etc. In the manufacturing process of lithium batt...

AI Technical Summary

Problems solved by technology

[0003] Lithium battery technology has developed rapidly with the needs of society, but there are also many safety problems, such as short circuit problems, gas problems, etc.

In the manufacturing process of lithium battery electrodes, due to the ductility of the metal current collector of the battery sheet when mechanically cutting the electrode sheet, the edge cannot be completely smooth after cutting, resulting in many sharp burrs, which also poses a safety hazard

Especially during the charging and discharging process of the battery, these sharp burrs will generate a strong electric field, which may cause the internal short circuit of the battery or even cause the battery to explode.

[0004] The method of removing burrs can be soaked in acid solution, but this treatment method will dissolve part of the adhesive, causing the electrode materials such as lithium manganate to fall off, resulting in the waste of the battery

The conventional treatment method in the industry is to use a brush dipped in a certain amount of acid to sweep back and forth on the side, but this method is difficult to completely remove the aluminum burrs

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