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Harmless treatment method for waste lithium battery electrolyte

A treatment method and electrolyte technology, applied in the field of environmental protection, can solve problems such as inability to effectively treat electrolyte

Active Publication Date: 2021-05-18
中科南京绿色制造产业创新研究院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the dry crushing recovery method still cannot effectively treat the electrolyte

Method used

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  • Harmless treatment method for waste lithium battery electrolyte

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] This embodiment provides a harmless treatment method for waste lithium battery electrolyte, and the treatment method includes the following methods:

[0049] (1) Carry out crushing treatment and drying treatment to the waste lithium battery after discharge successively, obtain the battery material and organic gas that remove electrolyte; The time interval of the drying treatment is 20s, and the end point of the crushing treatment is to make the material with a particle size<50mm account for 90wt% of the total material; during the drying treatment, the removal rate of the electrolyte is 90%; the temperature of the drying treatment is 150°C, the treatment time is 30s, and the drying treatment method is hot air drying;

[0050] (2) After the organic gas is dedusted, the temperature is raised to 150° C., and part of it is reused in the drying treatment described in step (1), and the remaining gas is discharged; the recycled gas accounts for 80 vol% of the total amount of th...

Embodiment 2

[0055] This embodiment provides a harmless treatment method for waste lithium battery electrolyte, and the treatment method includes the following methods:

[0056] (1) Carry out crushing treatment and drying treatment to the waste lithium battery after discharge successively, obtain the battery material and organic gas that remove electrolyte; The time interval of the drying treatment is 30s, and the end point of the crushing treatment is to make the material with a particle size<50mm account for 95wt% of the total material; during the drying treatment, the removal rate of the electrolyte is 92%; the temperature of the drying treatment is 160°C, the treatment time is 25s, and the drying treatment method is hot air drying;

[0057] (2) After the organic gas is dedusted, the temperature is raised to 160°C, and part of it is reused in the drying treatment described in step (1), and the remaining gas is discharged; the recycled gas accounts for 60vol% of the total amount of the o...

Embodiment 3

[0062] This embodiment provides a harmless treatment method for waste lithium battery electrolyte, and the treatment method includes the following methods:

[0063] (1) Carry out crushing treatment and drying treatment to the waste lithium battery after discharge successively, obtain the battery material and organic gas that remove electrolyte; The time interval of the drying treatment is 10s, and the end point of the crushing treatment is to make the material with a particle size<50mm account for 96wt% of the total material; during the drying treatment, the removal rate of the electrolyte is 95%; the temperature of the drying treatment is 180°C, the treatment time is 18s, and the drying treatment method is hot air drying;

[0064] (2) After the organic gas is dedusted, the temperature is raised to 180° C., and part of it is reused for the drying treatment described in step (1), and the remaining gas is discharged; the recycled gas accounts for 80 vol% of the total amount of t...

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Abstract

The invention provides a harmless treatment method for a waste lithium battery electrolyte, which comprises the following steps: crushing and drying a discharged waste lithium battery in sequence to obtain a battery material without the electrolyte and an organic gas; after the organic gas is subjected to purification treatment, recycling part of the organic gas for drying treatment, and discharging the residual gas; and monitoring the oxygen concentration, the organic gas concentration, the fluoride concentration, the chloride concentration and the system temperature in the crushing treatment and drying treatment process, and when any numerical value exceeds a set value, introducing an additive for adjustment. By means of the treatment method, harmlessness of the waste battery electrolyte can be achieved, diaphragm soft melting and unorganized emission of organic waste gas are avoided, meanwhile, purified gas is recycled, waste heat is fully utilized, and meanwhile the waste gas emission amount is greatly reduced; meanwhile, by monitoring the gas concentration, safety accidents of equipment in the production process are effectively avoided, and the requirements of safe production and clean production are met.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to a treatment method for waste lithium batteries, in particular to a treatment method for harmless electrolyte of waste lithium batteries. Background technique [0002] Lithium-ion batteries have the advantages of high energy, long life and low pollution. With the explosive growth of electric vehicles, the demand and scrapping of lithium-ion batteries have increased significantly. The large number of discarded lithium-ion batteries poses a huge replacement pollution risk. [0003] The positive and negative electrode materials and electrolytes of lithium-ion batteries have a huge impact on the environment and human health. If the waste lithium batteries are disposed of in ordinary garbage, the cobalt, nickel, manganese, lithium and other metals as well as inorganic and organic compounds will cause serious pollution to the environment and are extremely harmful. If th...

Claims

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Application Information

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IPC IPC(8): H01M10/54H01M10/0525
CPCH01M10/54H01M10/0525Y02W30/84Y02E60/10
Inventor 曹宏斌刘春伟孙峙
Owner 中科南京绿色制造产业创新研究院
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