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A kind of comprehensive utilization method of waste lithium ion battery

A lithium-ion battery, waste technology, applied in the field of waste new energy electric vehicle recycling, can solve the problems of low recycling efficiency, high energy consumption, waste of resources, etc., and achieve the effect of fast discharge time

Active Publication Date: 2019-07-12
普定县银丰农业科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of this, the present invention provides a comprehensive utilization method of waste lithium-ion batteries to solve many disadvantages in the existing lithium-ion battery recycling, such as high energy consumption, low recovery efficiency, and a large amount of waste of resources.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Step 1: Take 5 waste lithium-ion batteries and use a 25kΩ resistor to perform short-circuit discharge for 20 minutes, and then let them stand for 2 hours;

[0023] Step 2: Open 3 liquid guide holes around the bottom of the spent lithium-ion battery with a shell, then put it into a centrifuge, adjust the centrifuge speed to 200r / s, centrifuge for 10min, and discharge the internal electrolyte. Put it into a container, and obtain the remaining body including the steel casing and the positive and negative electrode materials after the electrolyte is discharged;

[0024] Step 3: Add 18 mL of LiOH with a concentration of 1 mol / L to the electrolyte solution obtained in step 2, and then further concentrate and purify to obtain LiOH and Li 2 CO 3 ;

[0025] Step 4: Put the remaining body obtained in step 2 into an ultrasonic cleaning machine equipped with absolute ethanol for cleaning for 5 minutes, take out the remaining body and air-dry it;

[0026] Step 5: Using a physical...

Embodiment 2

[0031] Step 1: Take 5 waste lithium-ion batteries and use a 50kΩ resistor to short-circuit discharge for 10 minutes and let them stand for 3 hours;

[0032] Step 2: Open 5 liquid guide holes around the bottom of the spent lithium-ion battery with a shell, then put it into a centrifuge, adjust the centrifuge speed to 300r / s, centrifuge for 15min, discharge the internal electrolyte, and electrolyze the discharged internal The liquid is put into the container, and the remaining body including the steel shell and the positive and negative electrode materials is obtained after the electrolyte is discharged;

[0033] Step 3: Add 18mL of LiOH solution with a concentration of 1mol / L to the electrolyte solution obtained in step 2, and then further concentrate and purify to obtain LiOH and Li 2 CO 3 ;

[0034] Step 4: Put the remaining body obtained in step 2 into an ultrasonic cleaning machine equipped with absolute ethanol to clean for 10 minutes, take out the remaining body and air...

Embodiment 3

[0040] Step 1: Take 5 waste lithium-ion batteries and use a 35kΩ resistor to short-circuit discharge for 15 minutes and let them stand for 2.5 hours;

[0041] Step 2: Open 4 liquid guide holes around the bottom of the spent lithium-ion battery with a shell, then put it in the centrifuge for 13 minutes, the centrifuge speed is 250r / s, discharge the internal electrolyte, and put the discharged internal electrolyte into the container , and obtain the remaining body including the steel casing and the positive and negative electrode materials after the electrolyte is discharged;

[0042] Step 3: Add 18 mL of LiOH with a concentration of 1 mol / L to the electrolyte solution obtained in step 2, and then further concentrate and purify to obtain LiOH and Li 2 CO 3 ;

[0043] Step 4: Put the remaining body obtained in step 2 into an ultrasonic cleaning machine equipped with absolute ethanol for cleaning for 8 minutes, take out the remaining body and air-dry it;

[0044] Step 5: Using ...

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Abstract

The invention discloses a comprehensive utilization method for waste lithium ion batteries. The comprehensive utilization method comprises the following steps: firstly using resistors to carry out short-circuit discharging on the waste lithium ion batteries; then forming liquid guide holes in the bottom peripheries of the waste lithium ion batteries with shells, discharging an internal electrolyte, filling a container with the discharged internal electrolyte, and obtaining a remaining body including steel outer shells and cathode and anode materials after the electrolyte is discharged; then adding an LiOH solution into the obtained electrolyte so that a stable solution of a salt prepared from lithium hydroxide and an acid can be generated from the dangerous electrolyte, and then carrying out further concentration and purification to obtain LiOH and Li2CO3; then separating the obtained remaining body into the steel outer shells, the cathode material lithium cobalt oxide and the anode material graphite by using a physical method; and finally, carrying out alkaline washing, acid washing and sodium carbonate cobalt-precipitation in sequence on the obtained cathode material lithium cobalt oxide so as to obtain cobalt carbonate precipitate, putting the obtained cobalt carbonate precipitate into a high-temperature sintering furnace for calcining so as to obtain the cobaltous oxide product. Therefore, green and efficient comprehensive recycling for the waste lithium ion batteries is realized.

Description

technical field [0001] The invention belongs to the technical field of recycling waste and old new energy electric vehicles, and in particular relates to a comprehensive utilization method of waste and old lithium ion batteries. Background technique [0002] With the widespread popularization of electric vehicles, laptop computers, mobile phones, etc., the consumption of lithium-ion batteries is huge, and the consumption of non-renewable metal resources is quite large. Lithium-ion batteries are composed of positive electrodes, separators, negative electrodes, organic electrolytes, wiring piles, and battery casings. The positive electrode is generally made of lithium cobaltate, and the separator is generally a specially formed polymer film. The film has a microporous structure that allows lithium ions to pass through freely, but electrons cannot pass through. The negative electrode active material is graphite or carbon similar to graphite. The organic electrolyte is a carbon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54
CPCY02W30/84
Inventor 陈剑钟安祯
Owner 普定县银丰农业科技发展有限公司
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