Lithium battery accurate recovery method and device

Abstract

The invention discloses a lithium battery accurate recovery method. The method comprises the steps of 1) performing discharge treatment on a waste lithium battery; 2) pumping an electrolyte in the waste lithium battery into a first collection box by adopting a waste lithium battery electrolyte recovery device, and drying the interior and exterior of the waste lithium battery from which the electrolyte is pumped; 3) shearing and separating a shell of the waste lithium battery, and recycling the shell to obtain a battery pole core; 4) cutting and crushing the battery pole core to obtain a crushed battery pole core; 5) putting the crushed battery pole core into a powdering device of a graphite separation device, pulverizing graphite in crushed battery pole core, pulverizing raised dust in thepulverizing device, spraying air at the bottom of the pulverizing device, sucking raised dust gas in the pulverizing device from the upper side wall or the top of the pulverizing device, arranging multiple stages of filter screens in a suction pipeline, and collecting graphite powder with different particle sizes through the filter screens. According to the invention, the electrolyte, the shell,the positive electrode metal and the negative electrode graphite can be accurately separated and recycled, and the resource utilization of the waste lithium battery is improved.

Description

technical field [0001] The invention relates to the technical field of lithium battery recycling. More specifically, the present invention relates to a precise recovery method and device for lithium batteries. Background technique [0002] Liquid lithium-ion batteries generally use lithium alloy metal oxide as the positive electrode material and graphite as the negative electrode material. There is a cavity between the positive and negative electrodes of the liquid lithium-ion battery to accommodate the electrolyte. The electrolyte includes organic solvents, electrolytes and additives. The cavity is provided with a diaphragm separating the positive and negative electrodes, and is packaged by an aluminum shell. [0003] Lithium batteries are easy to use and widely used because of their advantages such as high voltage, large specific capacity and no memory effect. After the service life of lithium batteries is over, it is imminent to turn waste lithium batteries into resourc...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that the existing waste lithium battery does not distinguish between various parts of recovery or the recovery effect is not accurate enough, the present invention provides a precise recovery method for lithium batteries. This method realizes waste lithium by extracting and drying the liquid inside the waste lithium battery Accurately separate the electrolyte inside the battery, and avoid the subsequent cutting and crushing pollution of the electrolyte; then cut and remove the shell of the separated waste lithium battery, obtain the battery pole core, and realize the separation of the shell; after the battery pole core is cut and pulverized, the The negative electrode graphite is separated from the positive electrode metal, so as to realize the separation and recovery of the electrolyte, casing, positive electrode and negative electrode of the waste lithium battery, overcome the problems of cumbersome separation by chemical precipitation and leaching and the use of a large amount of solvents, and accurately separate the electrolyte, casing , positive electrode metal and negative electrode graphite are separated and recycled, which is convenient for subsequent utilization and treatment, and improves the resource utilization of waste lithium batteries

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