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Novel process for efficiently crushing waste lithium ion battery

A lithium-ion battery, high-efficiency pulverization technology, applied in the removal of solid waste, grain processing, etc., to achieve the effect of reducing over-pulverization, efficient selective pulverization, and reducing recycling costs

Inactive Publication Date: 2011-04-13
EAST CHINA JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is, in order to overcome the shortcoming of the dry pulverization process that the existing processing old lithium-ion battery adopts, design a kind of new technology that adopts blade type impact crusher to carry out wet crushing

Method used

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  • Novel process for efficiently crushing waste lithium ion battery
  • Novel process for efficiently crushing waste lithium ion battery
  • Novel process for efficiently crushing waste lithium ion battery

Examples

Experimental program
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Effect test

Embodiment

[0026] Take 4 waste lithium-ion batteries to be crushed, each with a size of 55.58mm×41.52mm, and a total weight of 84.64g. Set the water flow rate to 500L / h, and after the crushing time is 40s, the yield of the product under the sieve of -0.25mm is obtained. 47.47%.

[0027] By sieving the material below -0.25mm, it is divided into three grades of -0.25+0.125mm, -0.125+0.075mm and -0.075mm for SEM and XRD analysis, respectively as Figure 2-7 As shown, it is confirmed that after the waste lithium ion battery is crushed by impact, the material below -0.25mm is mainly a mixture of lithium cobaltate and graphite.

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Abstract

The invention discloses a novel process for efficiently crushing a waste lithium ion battery. The process consists of residual electricity discharging, wet crushing and screening, wherein the residual electricity charging is to soak the waste lithium ion battery to be treated by using a 5 percent NaCl solution for 2 hours; the wet crushing is to crush the waste lithium ion battery subjected to the residual electricity charging in a blade impact crusher with water; and the screening is to screen the crushed slurry on a vibrating screen and settle materials enriched below a screen; the sediment is used for subsequent lithium cobaltate purification treatment; and materials on the screen can be treated in a classified mode. In the novel process, the waste lithium ion battery can be crushed efficiently and selectively, crushing time is short and crushing effect is good, and all materials such as lithium cobaltate, carbon materials and the like can be enriched below -0.25mm, so that an excellent raw material is provided for the subsequent treatment such as the lithium cobaltate recovery and the like and the recovery cost of the lithium cobaltate is greatly reduced. The novel process is suitable for the recovery treatment of the waste lithium ion battery.

Description

technical field [0001] The invention relates to a new high-efficiency crushing process of waste lithium ion batteries, which belongs to the technical field of waste material recovery. Background technique [0002] Lithium-ion batteries are widely used in the field of mobile electronic products such as mobile phones, notebook computers, video cameras, digital cameras, etc. The average lifespan is 500-1000 cycles, and lithium-ion batteries will fail after 2-3 years of use. Waste lithium-ion batteries are mainly composed of positive electrode material (lithium cobaltate active material), separator (polyethylene or polypropylene film), negative electrode material (active carbon material), organic electrolyte, electronic circuit components, thin metal layer inner core and The active material lithium cobalt oxide is most worthy of recycling. The regeneration methods mainly include high-temperature sintering method, wet chemical method and biological treatment method. [0003] Obt...

Claims

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Application Information

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IPC IPC(8): B09B1/00B02C18/00B02C23/08
Inventor 吴彩斌王成彦张涛李敦钫杨柳春聂发辉向速林陈鹏刘杰
Owner EAST CHINA JIAOTONG UNIVERSITY
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