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Solvent sorting and pre-processing method of waste lithium ion battery

A lithium-ion battery and pretreatment technology, which is applied in the field of hydrometallurgy, can solve the problems of industrialization such as difficulty and demanding requirements, and achieve the effects of short treatment cycle, reduced treatment cost and high separation rate

Inactive Publication Date: 2018-02-16
长沙佳纳锂业科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is simple and feasible to operate, but the requirements for vacuum and high temperature conditions are very strict, so it is difficult to industrialize

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The invention discloses a solvent sorting and pretreatment method for waste lithium ion batteries, which comprises the following steps:

[0024] Step 1. Discharge: Prepare an aqueous solution containing a conductive agent, stir the discharge solution evenly and place it in a closed discharge container, then put the waste lithium-ion battery into the prepared discharge container, so that the waste lithium-ion battery is completely immersed in the discharge container. Solution, when the voltage drops below 0.5V, the lithium-ion battery is completely discharged;

[0025] Step 2. Dismantling and cutting: With the help of a shearing machine, remove the outer packaging of the waste lithium-ion battery, and recycle the control circuit board and connecting metal sheet, and then cut the positive and negative electrodes of the single battery by the cutting machine into small pieces;

[0026] Step 3. Solvent sorting: collect the positive and negative waste electrodes processed in...

Embodiment 2

[0030] The invention discloses a solvent sorting and pretreatment method for waste lithium ion batteries, which comprises the following steps:

[0031] Step 1. Discharge: Prepare an aqueous solution containing a conductive agent, stir the discharge solution evenly and place it in a closed discharge container, then put the waste lithium-ion battery into the prepared discharge container, so that the waste lithium-ion battery is completely immersed in the discharge container. Solution, when the voltage drops below 0.5V, the lithium-ion battery is completely discharged;

[0032] Step 2. Dismantling and cutting: With the help of a shearing machine, remove the outer packaging of the waste lithium-ion battery, and recycle the control circuit board and connecting metal sheet, and then cut the positive and negative electrodes of the single battery by the cutting machine into small pieces;

[0033] Step 3. Solvent sorting: collect the positive and negative waste electrodes processed in...

Embodiment 3

[0037] The invention discloses a solvent sorting and pretreatment method for waste lithium ion batteries, which comprises the following steps:

[0038] Step 1. Discharge: Prepare an aqueous solution containing a conductive agent, stir the discharge solution evenly and place it in a closed discharge container, then put the waste lithium-ion battery into the prepared discharge container, so that the waste lithium-ion battery is completely immersed in the discharge container. Solution, when the voltage drops below 0.5V, the lithium-ion battery is completely discharged;

[0039] Step 2. Dismantling and cutting: With the help of a shearing machine, remove the outer packaging of the waste lithium-ion battery, and recycle the control circuit board and connecting metal sheet, and then cut the positive and negative electrodes of the single battery by the cutting machine into small pieces;

[0040]Step 3. Solvent sorting: collect the positive and negative waste electrodes processed in ...

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PUM

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Abstract

The invention discloses a solvent sorting and pre-processing method of a waste lithium ion battery. The solvent sorting and pre-processing method comprises the following steps of 1, performing discharging; 2, performing dismantling and cutting; 3, performing solvent sorting; and 4, performing water screening: putting the filtering residue obtained in the step 3 into a screening net, and taking pure water washing as power for screening, wherein the oversize products are aluminum foil and copper foil while the undersize products are positive and negative electrode active materials. The solvent sorting and pre-processing method of the waste lithium ion battery has the characteristics of going green and environmental protection, short treatment period, high separation efficiency and low cost.

Description

technical field [0001] The invention relates to the technical field of hydrometallurgy, in particular to a solvent sorting and pretreatment method for waste lithium ion batteries. Background technique [0002] Lithium-ion batteries are widely used, and the existing production capacity and scrap volume continue to create new highs. Studies have shown that the cycle cycle of lithium-ion batteries is about 500 times. During repeated charging and discharging, the electrodes are prone to swelling and deactivation of active materials. According to the classification method of my country's solid waste formulated by the National Environmental Protection Agency, lithium-ion waste batteries and their production waste belong to the category of hazardous waste. Solving the problem of environmental pollution from waste batteries has become one of the key points of environmental protection. [0003] How to classify and recycle the resources in waste lithium-ion batteries and make full use...

Claims

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Application Information

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IPC IPC(8): H01M10/54C22B7/00C22B26/12
CPCC22B7/006C22B26/12H01M10/54Y02P10/20Y02W30/84
Inventor 陈毅滨李文津陈渊万承平肖利汤依伟
Owner 长沙佳纳锂业科技有限公司
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