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Method for recovering lithium ion battery wastes by using thermal cracking

A lithium-ion battery, ion battery technology, applied in battery recycling, recycling technology, recycling by waste collectors, etc., can solve the problems of complex process, high cost, environmental pollution, etc.

Inactive Publication Date: 2017-07-11
SHANGHAI QIMOU ENERGY SOURCE TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, there are related recovery technologies about lithium-ion batteries, such as: Chinese patent application CN01130735.8, the title of the invention is "Method for recovering metals from waste lithium-ion batteries", although this invention can also achieve the recovery of metals therein purpose, but high-temperature furnace roasting is used in the recycling process, and the method of adding acid to dissolve is also used. The recycling process not only produces new environmental pollution, but also has high cost and complicated process, which is not suitable for large-scale recycling requirements.

Method used

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  • Method for recovering lithium ion battery wastes by using thermal cracking
  • Method for recovering lithium ion battery wastes by using thermal cracking
  • Method for recovering lithium ion battery wastes by using thermal cracking

Examples

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Embodiment 1

[0026] Reference figure 1 As shown, this embodiment provides a process for recycling the negative electrode of a waste lithium ion battery. The specific process is as follows:

[0027] The negative electrode produced in production or separated from the waste lithium ion battery is put into a high-temperature pyrolysis furnace for heating, and the binder bonding the negative electrode material and the negative electrode current collector is broken by heating, so that the negative electrode material is separated from the current collector On and off. Since the binder usually used to bond the negative electrode material and the negative electrode current collector is polyvinylidene tetrafluoroethylene, and polyvinylidene tetrafluoroethylene starts to decompose from 390 degrees, so the temperature of the high temperature cracking furnace is generally controlled at 400-450 degrees. Exhaust the gas produced by heating and cracking, absorb the exhaust gas, and then comprehensively utili...

Embodiment 2

[0029] Reference figure 2 As shown, this embodiment provides a process for recycling the anode of a waste lithium-ion battery. The specific process is as follows:

[0030] The positive electrode produced from the production or separated from the waste lithium ion battery is put into a high-temperature pyrolysis furnace for heating, and the binder bonding the positive electrode material and the positive electrode current collector is cracked by heating, so that the positive electrode material is collected from the positive Separated from the fluid. Since the binder usually used to bond the positive electrode material and the positive electrode current collector is polyvinylidene tetrafluoroethylene, and polyvinylidene tetrafluoroethylene starts to decompose from 390 degrees, so the temperature of the high temperature cracking furnace is generally controlled at 400-450 degrees. The gas produced by thermal cracking is discharged, and the discharged gas is absorbed and comprehensive...

Embodiment 3

[0032] Reference image 3 As shown, this embodiment provides a process for recycling the separators of waste lithium-ion batteries. The specific process is as follows:

[0033] The separator separated from the waste lithium ion battery is put into a high-temperature thermal cracking furnace for heating, and the separator is cracked by heating. Since the commonly used diaphragm is made of polyethylene or polypropylene, and the decomposition temperature of polyethylene or polypropylene is 400-430 degrees, the furnace temperature is controlled at 400-450 degrees. Exhaust the gas produced by thermal cracking, absorb the exhaust gas, and then comprehensively utilize it; what is left in the furnace is the mixture of the positive electrode material and the negative electrode material falling off the diaphragm. The positive electrode material and the negative electrode material can be made by the principle of specific gravity. Phase separation.

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Abstract

The invention discloses a method for recovering lithium ion battery wastes by using thermal cracking. The method is characterized in that the lithium ion battery wastes are heated in vacuum or under the protection of a gas to decompose adhesives for bonding positive electrode materials with anode current collectors or / and adhesives for bonding negative electrode materials with negative current collectors or / and diaphragms in order to separate the positive electrode materials from the anode current collectors or / and separate the negative electrode materials from negative current collectors or / and separate the positive electrode materials and the negative electrode materials adhered to the diaphragms from the diaphragms. The method realizes recycling of the lithium ion battery wastes, is environmentally-friendly, and is suitable for large-scale processing; and compared with the prior art, the method has significant progress and far-reaching social significance.

Description

Technical field [0001] The invention relates to a method for recycling batteries, in particular to a method for recycling lithium ion battery waste by thermal cracking. Background technique [0002] Nowadays, as more and more electronic products are scrapped, the amount of lithium-ion batteries used in electronic products is also increasing, and how to recycle lithium-ion batteries environmentally is becoming more and more important. There are related recycling technologies for lithium-ion batteries in the prior art, such as: Chinese patent application CN01130735.8, and the title of the invention is "Method for Recovering Metals from Waste Lithium-ion Batteries". Although this invention can also achieve the recovery of metals However, high-temperature furnace roasting is used in the recycling process, and the method of adding acid dissolution is also used. During the recycling process, not only new environmental pollution is generated, but also the cost is high and the process is...

Claims

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Application Information

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IPC IPC(8): H01M10/54
CPCY02W30/84H01M10/54
Inventor 王武生
Owner SHANGHAI QIMOU ENERGY SOURCE TECH DEV
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