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Wet degumming method of waste lithium battery disassembly material

A kind of technology of waste lithium battery, degumming method

Inactive Publication Date: 2021-01-12
HUNAN JINYUAN NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problems in this disclosed technology are: one is that there are multiple processes that need to be heated, or distilled, or dried, or steamed ammonia, which consumes a lot of energy; , material consumption is large; third, the process is complicated and the production cost is high

Method used

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  • Wet degumming method of waste lithium battery disassembly material
  • Wet degumming method of waste lithium battery disassembly material

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Experimental program
Comparison scheme
Effect test

Embodiment approach

[0014] Embodiment: The technical solution of the present invention is: a wet degumming method for dismantling materials of waste lithium batteries, which takes the following steps:

[0015] a. Preparation materials: the battery pack or battery core after removing the shell of the waste lithium-ion battery, without discharging, directly charged with water and torn into pieces, and magnetic separation and iron removal to obtain copper foil, aluminum foil, And scrap mixture materials such as plastics, diaphragm paper, etc.;

[0016] The direct charging of water and charging is torn into pieces: the waste lithium-ion battery pack or battery cell after unpacking does not need to be discharged, and the mass ratio is 1-10 times, preferably 2-9 times, 3-8 times, 4-7 times , under the protection of 5-6 times of water, or directly put it into the roller tearing machine under the condition of water spray for charged tearing, and tear it into pieces smaller than 15×15mm.

[0017] b. Wet ...

Embodiment 1

[0022] Embodiment 1: A kind of wet degumming method of waste lithium battery dismantling material, take the following steps:

[0023] a. Preparation materials: the battery pack or battery core after removing the shell of the waste lithium-ion battery does not need to be discharged. Under the protection of water with a mass ratio of 1 times, it is put into a double-roll tearing machine for charged tearing, and the torn into For fragments smaller than 15×15mm, remove iron by magnetic separation to obtain a mixture of fragments of copper foil, aluminum foil, plastic, and separator paper with positive and negative materials;

[0024] b. Wet degumming: 10.0kg of the mixed fragments obtained in step a after iron removal are put into the degumming barrel, soaked in 40kg of degumming agent with a volume ratio of 10% with tetrahydrofuran and tap water, and stirring at 30 rpm Stir at high speed for 30 minutes to separate the positive and negative electrode materials from the copper foil...

Embodiment 2

[0027] Embodiment 2: A kind of wet degumming method of waste lithium battery dismantling material, take following steps:

[0028] a. Preparation material: the battery pack or battery core after removing the shell of the waste lithium-ion battery, without discharging, under the protection of water with a mass ratio of 10 times, put it into a double-roll tearing machine for charged tearing, and tear it into For fragments smaller than 15×15mm, remove iron by magnetic separation to obtain a mixture of fragments of copper foil, aluminum foil, plastic, and separator paper with positive and negative materials;

[0029] B. Wet degumming: 10.0kg of mixed fragments after the deironing that step a makes is put into the degumming barrel, be made into the degumming agent 50kg that volume ratio is 5% with N-dimethylacetamide and tap water soak, in Stir for 10 minutes at a stirring speed of 15 rpm to separate the positive and negative electrode materials from the copper foil and aluminum foi...

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Abstract

The invention relates to a wet degumming method of a waste lithium battery disassembly material, and relates to a waste lithium battery recovery method. The waste lithium battery recovery method comprises the following steps: preparing a material: removing a shell of a waste lithium ion battery, directly tearing the waste lithium ion battery into fragments with water and electricity without discharging, and removing iron by magnetic separation to obtain a mixture material to which positive and negative electrode materials adhere; wet degumming: putting the material into a degumming barrel, adding 1-20% of a degumming agent according to the volume ratio, soaking and stirring for 5-60 minutes, and separating the positive and negative electrode materials from copper foil and aluminum foil orfoaming and degumming positive and negative electrode gum sheets; wet screening: pushing the degummed materials by water to enter a 150-mesh screen to be subjected to wet screening; and filtering andseparating: carrying out filter pressing on an undersize product by using a plate-and-frame filter press to obtain a filter cake which is a crude positive-negative electrode material 3 and filtrate which is degumming agent containing liquid, and returning the liquid to the degumming agent preparation process. The wet degumming method has the characteristics of simple process, remarkable reductionof energy consumption and material consumption, cyclic utilization of waste water, low production cost and no potential safety hazards.

Description

technical field [0001] The invention relates to a method for recycling waste lithium batteries, in particular to a method for wet degumming of waste lithium battery materials. Background technique [0002] After the waste lithium-ion power battery is disassembled, the positive and negative electrode materials of the battery adhere to the copper foil and aluminum foil. Since the positive and negative electrode materials of the battery are coated on the copper foil and aluminum foil by an organic adhesive, even if they are mechanically crushed to It is very broken and difficult to fall off. In the prior art, there are dry degumming and warm degumming for peeling off the positive and negative materials. The dry degumming is to use the high temperature of the fire to burn the organic adhesive, or control a certain temperature to make the organic adhesive invalid. , so that the positive and negative electrode materials fall off from the copper foil and aluminum foil, dry degummin...

Claims

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Application Information

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IPC IPC(8): B09B3/00B09B5/00C11D7/26C11D7/32C11D7/34C11D7/60H01M10/54
CPCB09B5/00C11D7/264C11D7/3263C11D7/34C11D7/267H01M10/54B09B3/80Y02W30/84
Inventor 刘训兵欧阳剑君刘席卷董雄武周群成吴三木王子赵湘平李鹏飞陈赞张超文刘畅
Owner HUNAN JINYUAN NEW MATERIALS CO LTD