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Resource recycling method of lithium ion batteries

A technology of lithium-ion batteries and recycling methods, which is applied in the field of battery recycling, and can solve problems such as complex processes, environmental pollution, and high costs

Active Publication Date: 2016-01-13
上海珮钧科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, there are related recycling technologies about lithium-ion batteries, such as: Chinese patent application CN01130735.8, the invention titled "Method for recovering metals from waste lithium-ion batteries" discloses a recycling method, which Although the invention can also achieve the purpose of recovering the metals in it, high-temperature furnace roasting is used in the recovery process, and the means of adding acid to dissolve is also used. In the recovery process, not only new environmental pollution is produced, but also the cost is high and the process is complicated. Not suitable for large-scale recycling requirements! Therefore, developing a high-efficiency, pollution-free, and low-cost resource recovery method for lithium-ion batteries will have important value and social significance for solving the pollution and resource recovery of waste lithium-ion batteries.

Method used

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  • Resource recycling method of lithium ion batteries
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  • Resource recycling method of lithium ion batteries

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Experimental program
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Effect test

Embodiment 1

[0040] refer to figure 1A process flow for recycling the positive and negative electrode mixtures of lithium-ion batteries provided in this embodiment is as follows: put the positive and negative electrode mixtures obtained after the separation of waste lithium-ion batteries into a high-temperature liquid, and the The temperature of the high temperature liquid is higher than the melting point of aluminum and lower than the melting point of copper. Through the heating of the high-temperature liquid, the aluminum foil of the positive electrode current collector is melted, and the lithium salt of the positive electrode material such as lithium cobaltate adhering to the positive electrode current collector will break away from the aluminum foil of the positive electrode current collector and enter the high-temperature liquid. The graphite powder on the copper foil of the negative electrode current collector will detach and enter the high-temperature liquid under the action of high...

Embodiment 2

[0042] refer to figure 2 , a process flow for recycling lithium-ion battery separators provided in this embodiment is as follows: disassemble waste lithium-ion batteries to obtain separators, and the two sides of the separators are respectively adhered with positive and negative electrode materials, and the separators are added to In the high-temperature liquid, the temperature of the high-temperature liquid is generally controlled between 400°C and 450°C. At this temperature, the recovery rate of the oil obtained after the diaphragm is decomposed is the highest. Through the heating of the high-temperature liquid, the diaphragm can be decomposed into gas and / or the oil is recovered. Add water to the high-temperature liquid, through the dissolution of water, form an aqueous solution, and filter to obtain the filtrate and filter cake. Evaporating the filtrate can recover high-temperature liquid for recycling. After cleaning and drying the filter cake, heat and oxidize the ob...

Embodiment 3

[0044] refer to image 3 , another process flow for recycling the positive and negative electrode mixtures of lithium-ion batteries provided in this embodiment is as follows: the positive and negative electrode mixtures obtained by dismantling waste lithium-ion batteries are put into high-temperature liquid, and the high-temperature liquid The temperature is higher than the melting point of aluminum and lower than the melting point of copper. Through the heating of the high-temperature liquid, the aluminum foil of the positive electrode current collector is melted, and the lithium salt of the positive electrode material such as lithium cobaltate adhering to the positive electrode current collector will break away from the aluminum foil of the positive electrode current collector and enter the high-temperature liquid. The graphite powder on the copper foil of the negative electrode current collector will detach and enter the high temperature liquid under the action of high temp...

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Abstract

The invention discloses a resource recycling method of lithium ion batteries. The method comprises the following steps: putting a diaphragm obtained through separation in high temperature liquid A, breaking the diaphragm into gas and / or oil to be discharged through heating effect of the high temperature liquid A so as to obtain the high temperature liquid A containing an anode material and a cathode material, and filtering to obtain the separated anode material and cathode material; putting the mixture of an anode and a cathode obtained through separation in high temperature liquid B, breaking the anode material and the cathode material away from an anode current collector and a cathode current collector through heating effect of the high temperature liquid B, then dissolving the high temperature liquid B in water, filtering to obtain the mixture of the anode material, the anode current collector, the cathode material and the cathode current collector, and further separating so as to obtain the cathode material, the anode current collector and the cathode current collector respectively. The method disclosed by the invention has the advantages of high separation efficiency, simple technology, no pollution, low cost and the like, and can solve the pollution and resource recovery problems of waste lithium ion batteries.

Description

technical field [0001] The invention relates to a battery recovery method, in particular to a resource recovery method for lithium ion batteries. Background technique [0002] Nowadays, as more and more electronic products are scrapped, the amount of scrapped lithium-ion batteries used in electronic products is also increasing. How to recycle lithium-ion batteries in an environmentally friendly manner is becoming more and more important. In the prior art, there are related recycling technologies about lithium-ion batteries, such as: Chinese patent application CN01130735.8, the invention titled "Method for recovering metals from waste lithium-ion batteries" discloses a recycling method, which Although the invention can also achieve the purpose of recovering the metals in it, high-temperature furnace roasting is used in the recovery process, and the means of adding acid to dissolve is also used. In the recovery process, not only new environmental pollution is produced, but als...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54
CPCY02W30/84
Inventor 王武生
Owner 上海珮钧科技有限公司