Method and device for separating roll core and shell of waste lithium ion battery

Abstract

The invention discloses a method and device for separating a roll core and a shell of a waste lithium ion battery. The method comprises the steps that the square lithium ion battery is flatly fixed, and a cover plate of the lithium ion battery is made to be located on the outer portion of a fixing table; cutters are used for cutting the upper end face and the lower end face of the part, below the cover plate, of the shell of the square lithium ion battery, and an incomplete cut mark is formed; the cover plate of the square lithium ion battery is fixed, an ejector pin is used for being inserted into an anti-explosion hole in the cover plate of the square lithium ion battery, high-pressure inert gas is introduced into the anti-explosion hole, breakage occurs at the part of the cut mark, and the shell of the square lithium ion battery is rushed by the high-pressure gas and falls to be separated; a pole lug between the cover plate and the roll core is cut off, and the cover plate and the roll core are separated. By means of the pre-cutting and high-pressure gas pressurization, the shell and the cover plate are broken along the cut mark defect position, and the shell is rushed by the high-pressure gas and falls to be separated, so that the risk of short circuiting caused when metal enters in the cutting process is avoided, the cover plate and the roll core of the battery in deformation expansion are easily separated, and the method is safe, stable and efficient.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a separation method and equipment for a waste lithium ion battery winding core and casing. Background technique [0002] Lithium-ion batteries are widely used because of their excellent electrochemical performance, especially in recent years with the development of new energy vehicle industry, more and more lithium-ion batteries are widely used in electric vehicles. However, the lifespan of general lithium-ion batteries is generally 5 to 8 years. With the end of the service life of lithium-ion batteries, the issue of recycling them is particularly important. [0003] At present, the lithium-ion battery recycling method is generally to carry out mechanical separation first and then carry out wet treatment to recycle valuable materials. In the recycling step, the shell and the winding core must first be separated before subsequent processing can begin. ...

AI Technical Summary

Problems solved by technology

At present, the materials of lithium-ion battery casings are generally steel, aluminum, etc., and mechanical cutting or physical crushing are generally used to separate them. However, this traditional method will introduce metal chips into the battery cell during the implementation process and cause a short circuit. Or misplaced and cut to the positive and negative poles, resulting in the phenomenon of battery short circuit and ignition

Moreover, the continuous cutting operation using this method will cause greater wear and tear on the cutting knife or abrasive tool. In addition, the requirements for the material and hardness of the cutting knife are also relatively high.

[0004] When dealing with scrap lithium-ion batteries, most of the battery shapes will bulge to varying degrees. The traditional cutting method is simply to cut the shell, and because the winding core and the shell are often bonded tightly, the winding core and the shell are often bonded tightly. The separation of the shell may still require other external forces

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