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Regeneration method of waste lithium ion battery shell

A technology for lithium-ion batteries and shells, which is applied in the field of regeneration of waste lithium-ion battery shells, can solve problems such as residual stains and performance degradation, and achieve the effects of reducing processing costs, facilitating processing and use, and good soaking effects

Pending Publication Date: 2022-03-11
安徽南都华铂新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lithium batteries are widely used in power machinery and equipment due to their excellent charge and discharge performance. Lithium batteries need to be dismantled and recycled professionally, but the disassembled shell of the lithium battery has a lot of residual stains, dust and grease on the surface, so it is necessary to reprocess the used lithium ion battery shell to achieve regeneration

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Soak the lithium-ion battery case in a 40°C soaking solution for 20 minutes to infiltrate the stubborn dust accumulated on the lithium-ion battery case. The soaking solution consists of 15kg of sodium carbonate, 1kg of sodium chloride, 10kg of sodium citrate, and 60kg of water. , ethyl acetate oil layer 20kg, during the soaking process, the lithium-ion battery casing is continuously vibrated, the sodium carbonate in the soaking liquid can effectively remove the grease on the surface of the lithium-ion battery casing, and at the same time, the citric acid Sodium and sodium carbonate are used together to make the water layer in the soaking solution alkaline, which can corrode the aluminum oxide film on the surface of the lithium-ion battery casing, so that the stains on the surface of the lithium-ion battery casing can be effectively removed, while sodium chloride It can provide chloride ions and sodium ions for the soaking liquid, increase the ion concentration, make the ...

Embodiment 2

[0025] Soak the lithium-ion battery casing in a 50°C soaking solution to infiltrate the stubborn dust accumulated on the lithium-ion battery casing. The soaking solution consists of 20kg of sodium carbonate, 2kg of sodium chloride, 15kg of sodium citrate, 70kg of water, ethyl acetate The ester oil layer is mixed with 30kg. During the soaking process, the lithium-ion battery case is continuously vibrated. After soaking for 30 minutes, the sodium carbonate in the soaking liquid can effectively remove the grease on the surface of the lithium-ion battery case. At the same time, citric acid Sodium and sodium carbonate are used together to make the water layer in the soaking solution alkaline, which can corrode the aluminum oxide film on the surface of the lithium-ion battery casing, so that the stains on the surface of the lithium-ion battery casing can be effectively removed, while sodium chloride It can provide chloride ions and sodium ions for the soaking liquid, increase the ion...

Embodiment 3

[0030] Soak the lithium-ion battery case in a 40°C soaking solution to infiltrate the stubborn dust accumulated on the lithium-ion battery case. The soaking solution consists of 20kg of sodium carbonate, 2kg of sodium chloride, 15kg of sodium citrate, 70kg of water, ethyl acetate The ester oil layer is mixed with 25kg. During the soaking process, the lithium-ion battery shell is continuously vibrated. After soaking for 30 minutes, the sodium carbonate in the soaking liquid can effectively remove the grease on the surface of the lithium-ion battery shell. At the same time, citric acid Sodium and sodium carbonate are used together to make the water layer in the soaking solution alkaline, which can corrode the aluminum oxide film on the surface of the lithium-ion battery casing, so that the stains on the surface of the lithium-ion battery casing can be effectively removed, while sodium chloride It can provide chloride ions and sodium ions for the soaking liquid, increase the ion c...

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Abstract

The invention discloses a regeneration method of a waste lithium ion battery shell, which comprises the following steps: soaking the lithium ion battery shell in a soaking solution at 30-50 DEG C for 20-30 minutes; the soaked lithium ion battery shell is washed with water, then the lithium ion battery shell is placed in a cleaning solution to be soaked for 10-20 min, and then the surface of the lithium ion battery shell is cleaned under the action of ultrasonic cleaning; the cleaned lithium ion battery shell is washed with water and then dried, cutting, grinding, repairing, surface grinding and polishing are carried out, and the regenerated lithium ion battery shell is obtained.The defects in the prior art are overcome, the regeneration method is simple in process, soaking liquid and cleaning liquid used in the regeneration process are environmentally friendly and free of pollution, and the regeneration process is simple. The treatment cost after regeneration is reduced, and the regenerated lithium ion battery shell processed by the regeneration method is clean in surface and convenient for subsequent processing and use.

Description

technical field [0001] The invention relates to the technical field of regeneration of battery shells, in particular to a regeneration method for spent lithium-ion battery shells. Background technique [0002] Lithium-ion battery is a secondary battery (rechargeable battery) that mainly relies on the movement of lithium ions between the positive and negative electrodes to work. During the charging and discharging process, Li + Intercalation and deintercalation back and forth between two electrodes: when charged, Li + It is deintercalated from the positive electrode, inserted into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true during discharge. Lithium batteries are widely used in power machinery and equipment due to their excellent charge and discharge performance. Lithium batteries need to be disassembled and recycled professionally. However, the disassembled shell of the lithium battery has a l...

Claims

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Application Information

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IPC IPC(8): H01M10/54C11D7/18C11D7/40
CPCH01M10/54C11D3/3902C11D7/40Y02W30/84
Inventor 朱建楠
Owner 安徽南都华铂新材料科技有限公司
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