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A kind of recycling method of lithium-ion battery pole piece material

A lithium-ion battery and recovery method technology, applied in the field of lithium-ion battery pole piece material recovery, can solve the problems of complex process, resource waste environment, high energy consumption, etc., and achieve the effect of simple process

Active Publication Date: 2019-12-27
CHINA AVIATION LITHIUM BATTERY LUOYANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the country's vigorous promotion of electric vehicles, a large number of power lithium batteries will face the problem of being scrapped in the future. According to the prediction of China Automotive Technology Research Center, the recovery rate of waste batteries in my country is less than 2%, and waste lithium-ion batteries contain a lot of waste. Utilized resources, such as aluminum, copper and other valuable metals, graphite, cathode materials, etc.; if these waste lithium batteries are not properly disposed of, it will cause a great waste of resources and environmental pollution
Although this method can improve the purity of recycled materials, the process is complicated and the energy consumption is high

Method used

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  • A kind of recycling method of lithium-ion battery pole piece material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The recovery method of the lithium-ion battery pole piece material of the present embodiment may further comprise the steps:

[0020] 1) Discharge the recovered lithium-ion battery, discharge the electrolyte, then crush, sort or disassemble to obtain the positive electrode sheet, and then crush the positive electrode sheet to obtain the positive electrode sheet powder with a mesh size of 50-100 mesh;

[0021] 2) Separating about 95% (weight percent) metal aluminum current collector from the positive electrode sheet powder obtained in step 1) by winnowing first, and then screening, and the rest containing about 5% aluminum (accounting for the fineness of the positive electrode material) The mass percentage of powder) positive electrode material fine powder;

[0022] 3) Grinding the positive electrode material fine powder with a 300-mesh roller mill, and then sieving with a 300-mesh ultrasonic vibrating sieve to obtain cake-shaped current collector metal aluminum particle...

Embodiment 2

[0024] The recovery method of the lithium-ion battery pole piece material of the present embodiment may further comprise the steps:

[0025] 1) Discharging the recovered lithium-ion battery, discharging the electrolyte, then crushing, sorting or disassembling to obtain the negative electrode sheet, and then pulverizing the obtained negative electrode sheet to obtain the negative electrode sheet powder with a mesh size of 50-100 mesh;

[0026] 2) Separating about 95% (mass percentage) metal copper current collector from the negative electrode sheet powder obtained in step 1) by winnowing first, and then screening, and the remaining copper containing about 5% (accounting for the negative electrode material fines). The mass percent of powder) negative electrode material fine powder;

[0027] 3) The fine powder of the negative electrode material is rolled by a 300-mesh roller press, and then sieved by a 300-mesh ultrasonic vibrating sieve to obtain the cake-shaped current collecto...

Embodiment 3

[0029] The recovery method of the lithium-ion battery pole piece material of the present embodiment may further comprise the steps:

[0030] 1) Discharging the recovered lithium-ion battery, discharging the electrolyte, disassembling to obtain the positive electrode sheet, and then pulverizing the obtained positive electrode sheet to obtain the positive electrode sheet powder with a mesh size of 50-100 mesh;

[0031] 2) Separate about 95% (mass percentage) metal aluminum current collector from the positive electrode sheet powder obtained in step 1) by winnowing first, and then screen, and the remaining is about 5% copper (accounting for the positive electrode material fines). The mass percentage of powder) positive electrode material fine powder;

[0032] 3) Rolling the positive electrode material fine powder with a 300-mesh roller press, and then sieving with a 300-mesh ultrasonic vibrating sieve to obtain the cake-shaped current collector metal aluminum particles a on the si...

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Abstract

The invention relates to a recyclable method for a pole piece material of a lithium ion cell, belonging to the technical field of waste lithium ion cell recycling treatment. The recyclable method for the pole piece material of the lithium ion cell comprises the following steps of selecting the pole piece powder, then extruding the remaining pole piece powder, and sieving the extruded powder to obtain the cake-shaped current collector metal particles on the sieve and the electrode material powder under the sieve; the pole piece powder is the powder obtained after crushing the positive or negative pole piece. The method of the invention is simple in process and takes advantage of the good ductility of aluminum and copper. The method includes the steps of extruding the sorted pole piece powder, and then the aluminum particles or copper particles of the pole piece powder can be extruded into a cake shape, while other particles are further crushed into smaller particles, and then the cake-shaped aluminum particles or copper particles and other particles are separated through the sieving. In this way, not only the purity of the electrode material powder is improved, but also the recycling efficiency of aluminum or copper is improved, and the whole process does not need any chemical reagents and does not bring secondary pollution.

Description

technical field [0001] The invention relates to a method for recycling pole piece materials of lithium-ion batteries, and belongs to the technical field of recycling and processing of waste lithium-ion batteries. Background technique [0002] With the country's vigorous promotion of electric vehicles, a large number of power lithium batteries will face the problem of being scrapped in the future. According to the prediction of China Automotive Technology Research Center, the recovery rate of waste batteries in my country is less than 2%, and waste lithium-ion batteries contain a lot of waste. Utilized resources, such as aluminum, copper and other valuable metals, graphite, cathode materials, etc.; if these waste lithium batteries are not properly disposed of, it will cause a great waste of resources and environmental pollution. [0003] At present, the main valuable recycled substances in lithium-ion batteries are copper, aluminum, positive electrode powder and negative elect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/054B09B3/00
CPCB09B3/00H01M10/054Y02E60/10
Inventor 齐彬伟朱建楠李肖肖
Owner CHINA AVIATION LITHIUM BATTERY LUOYANG