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Method for comprehensive recycling of waste lithium-ion batteries

A lithium-ion battery and waste technology, which is applied in the field of recycling of renewable resources, can solve the problems of lack of environmental protection and economic comprehensive recycling methods, and achieve the effect of being suitable for industrial applications, process environmental protection, and solving treatment

Active Publication Date: 2016-08-17
SICHUAN CHANGHONG ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in the field of waste lithium-ion battery recycling, there is a lack of comprehensive recycling methods that take into account both environmental protection and economic aspects.

Method used

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  • Method for comprehensive recycling of waste lithium-ion batteries

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] a. Weigh 1000g of used lithium-ion batteries, soak them in sodium bicarbonate solution for 5 hours, and release the residual power to avoid battery short circuit during the crushing process.

[0052] b. In a closed shearing crusher, the waste lithium-ion battery is broken into flakes of 10-20mm by spraying, and the flake battery is sent to the electrolyte cleaning process with the spraying liquid.

[0053] c. Stir the spray liquid and sheet battery mixture fully for 0.6 hours, peel off the carbon powder on the surface of the copper foil, dissolve most of the electrolyte into the spray liquid, and recover the suspended spray liquid containing carbon powder and electrolyte through filtration Carbon powder, the mass fraction of carbon powder is 99.5%, detect and filter solution, do not detect fluorine ion, hexafluorophosphate ion 10.3g.

[0054] d. Airtightly conveying the filtered sheet-shaped battery into a 4% sodium hydroxide solution by mass fraction, stirring for 10 m...

Embodiment 2

[0058] a. Weigh 1000g of used lithium-ion batteries, soak them in sodium bicarbonate solution for 8 hours, and release the residual power to avoid battery short circuit during the crushing process.

[0059] b. In a closed shearing crusher, the waste lithium-ion battery is broken into flakes of 10-20mm by spraying, and the flake battery is sent to the electrolyte cleaning process with the spraying liquid.

[0060] c. Stir the mixture of the spray liquid and the sheet battery for 1.2 hours, peel off the carbon powder on the surface of the copper foil, dissolve most of the electrolyte into the spray liquid, and recover the suspended spray liquid containing carbon powder and electrolyte through filtration Carbon powder, the mass fraction of carbon powder is 99.5%, detect and filter solution, do not detect fluoride ion, hexafluorophosphate ion 10.5g.

[0061] d. Airtightly conveying the filtered sheet-shaped battery into a 3% sodium hydroxide solution by mass fraction, stirring for...

Embodiment 3

[0065] a. Weigh 1000g of used lithium-ion batteries, soak them in sodium bicarbonate solution for 11 hours, and release the residual power to avoid battery short circuit during the crushing process.

[0066] b. In a closed shearing crusher, the waste lithium-ion battery is broken into flakes of 10-20mm by spraying, and the flake battery is sent to the electrolyte cleaning process with the spraying liquid.

[0067] c. Stir the mixture of the spray liquid and the sheet battery for 1.8 hours, peel off the carbon powder on the surface of the copper foil, dissolve most of the electrolyte into the spray liquid, and recover the suspended spray liquid containing carbon powder and electrolyte through filtration Carbon powder, the mass fraction of carbon powder is 99.4%, detects filtered solution, does not detect fluorine ion, hexafluorophosphate ion 10.6g.

[0068] d. Airtightly conveying the filtered sheet battery into a 2% sodium hydroxide solution by mass fraction, stirring for 50 m...

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Abstract

The invention discloses a method for comprehensively recycling waste lithium ion batteries, and belongs to the field of recycling of regeneration resource. The method comprises the following steps: a, performing discharging processing on waste lithium ion batteries; b, fragmenting waste lithium ion batteries into sheets with a diameter of 10-20 mm in a closed shearing-type crusher, and spraying during fragmentation to dissolve lithium hexafluorophosphate in the waste lithium ion batteries into a spraying solution; c, peeling carbon powder on the surface of aluminium foils through stirring, dissolving electrolyte into the spraying solution, and recovering carbon powder; d, sending the sheets into a sodium hydroxide solution, peeling lithium cobalt oxide powder on the surface of aluminium foils through stirring, and recovering lithium cobalt oxide powder; e, cleaning the sheets, and recovering lithium cobalt oxide powder; and f, separating and recovering plastic and a copper-aluminium mixture. The method realizes recovery of carbon powder, lithium cobalt oxide powder, the copper-aluminium mixture and plastic through a simple environment-friendly process, and has certain economic benefit and social benefit.

Description

technical field [0001] The invention belongs to the field of recovery and utilization of renewable resources, and in particular relates to a method for comprehensive recovery and utilization of waste lithium ion batteries. Background technique [0002] As a representative of modern high-performance batteries, lithium-ion batteries have been widely used in notebook computers, mobile communication terminals, and new energy vehicle industries in recent years. At present, the annual output of lithium-ion batteries in the world has exceeded 1 billion. Discarded lithium-ion batteries need to be treated in a safe and environmentally friendly manner, and lithium-ion batteries contain metals such as cobalt, copper, and aluminum, which have the value of recycling. Whether it is from the perspective of resource reuse or environmental protection, it is necessary to recycle waste lithium-ion batteries. [0003] There are many domestic patented methods for recycling waste lithium-ion bat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54
CPCY02W30/84
Inventor 潘晓勇彭玲郅慧陈伟华卢潇韦泽平陈正
Owner SICHUAN CHANGHONG ELECTRIC CO LTD
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