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Method for separating and recovering electrolyte in waste power lithium batteries by means of ultrasonic enhanced extraction

An ultrasonic enhancement, separation and recovery technology, applied in separation methods, chemical instruments and methods, solvent extraction, etc., can solve the problems of secondary pollution and fluorine-containing wastewater, and achieve zero discharge of three wastes, high-efficiency separation, and a wide range of applications. Effect

Inactive Publication Date: 2020-01-03
JINCHUAN GROUP LIMITED +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, the electrolyte lithium hexafluorophosphate is sprayed and absorbed to produce fluorine-containing wastewater, causing secondary pollution to the environment

Method used

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  • Method for separating and recovering electrolyte in waste power lithium batteries by means of ultrasonic enhanced extraction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) Steps of electrified crushing of waste batteries under the protection of inert gas and closed atmosphere: 10kg of waste power ternary lithium batteries are charged and crushed under the protection of carbon dioxide gas and closed atmosphere. Crushed to obtain waste battery scraps, the size of scraps is 20mm*20mm. The crushed battery scraps are transported to the ultrasonic enhanced extraction process in a closed system.

[0017] (2) Steps of ultrasonically enhanced extraction and recovery of electrolyte in waste battery scraps: crushed battery scraps enter the ultrasonically enhanced extraction process, extraction temperature is 25°C, extraction time: 5min, extraction flow ratio: 1:5, so that the battery scraps The electrolyte in the material is extracted into the main extractant and auxiliary extractant, and at the same time, the electrode powder is completely separated from the copper and aluminum foil.

[0018] (3) Steps of organic solvent evaporation, condensat...

Embodiment 2

[0021] (1) Steps of electrified crushing of waste batteries under inert gas protection and closed atmosphere: 50kg of waste power lithium iron phosphate batteries are charged and crushed under nitrogen protection and closed atmosphere. Crushed to obtain waste battery scraps, the size of scraps is 20mm*20mm. The crushed battery scraps are transported to the ultrasonic enhanced extraction process in a closed system.

[0022] (2) Steps of ultrasonically enhanced extraction and recovery of electrolyte in waste battery scraps: crushed battery scraps enter the ultrasonically enhanced extraction process, extraction temperature is 20°C, extraction time: 60min, extraction flow ratio: 1:2. The electrolyte in the battery scrap is extracted into the main extractant and auxiliary extractant, and at the same time, the electrode powder is completely separated from the copper and aluminum foil.

[0023] (3) Steps of organic solvent evaporation, condensation, separation and recovery after ext...

Embodiment 3

[0025] (1) Steps of electrified crushing of waste batteries under inert gas protection and closed atmosphere: 200kg of waste power lithium cobalt oxide batteries are charged and crushed under argon protection and closed atmosphere. Crushed to obtain waste battery scraps, the size of scraps is 20mm*20mm. The crushed battery scraps are transported to the ultrasonic enhanced extraction process in a closed system.

[0026] (2) Steps of ultrasonically enhanced extraction and recovery of electrolyte in waste battery scrap: crushed battery scrap enters the ultrasonically enhanced extraction process, extraction temperature is 18°C, extraction time: 120min, extraction flow ratio: 1:1. The electrolyte in the battery scrap is extracted into the main extractant and auxiliary extractant, and at the same time, the electrode powder is completely separated from the copper and aluminum foil.

[0027] (3) Steps of organic solvent evaporation, condensation, separation and recovery after extract...

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Abstract

The invention belongs to the technical field of waste battery recovery, and discloses a method for separating and recovering electrolyte in waste power lithium batteries by means of ultrasonic enhanced extraction. The method is characterized by comprising the following steps: (1) disassembling and crushing waste power lithium batteries under the protection of inert gas and in a closed state to obtain crushed waste batteries; (2) feeding the crushed waste lithium batteries into extraction equipment, and carrying out ultrasonic enhanced extraction to realize extraction separation of the electrolyte; and (3) separating and recovering the extracted electrolyte, a main extraction agent and an auxiliary extraction agent through evaporation and condensation, and recycling the recovered electrolyte, the recovered main extraction agent and the recovered auxiliary extraction agent in the extraction process. The method has the beneficial effects: the method has a wide range of applications; and the electrolyte in power lithium ion batteries is efficiently extracted and separated, and the main extraction agent and the auxiliary extraction agent are recycled after being evaporated and condensed, no polluting gas, liquid or solid waste is generated in the whole process, zero emission of three wastes is truly realized, the method is environment-friendly, and large-scale industrial applicationis easy to realize.

Description

technical field [0001] The invention relates to the field of recycling waste lithium ion batteries, in particular to a method for separating and recycling electrolyte solution in waste power lithium batteries by means of an ultrasonic enhanced extraction method. Background technique [0002] Under the guidance and promotion of national policies, my country's new energy automobile industry has developed rapidly. It is estimated that by 2020, the production and sales of pure electric vehicles and plug-in hybrid vehicles will both exceed 2 million, reaching the target set in the "Energy Saving and New Energy Vehicle Industry Development Plan (2012-2020)" issued by the State Council. According to the service life of the battery for 5-8 years, in 2018 the battery will begin to enter the period of scrapping. According to the forecast of the China Automotive Technology and Research Center, the total scrapping of lithium batteries will reach 32.2Gwh in 2020, about 500,000 tons; the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54B01D11/02
CPCH01M10/54B01D11/0265B01D11/0288B01D11/0296Y02W30/84
Inventor 李兰兰王甲琴陈天翼张明兰保毓鹏柴艮风王杰伟吴明敏
Owner JINCHUAN GROUP LIMITED
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