Recycling method for waste lithium ion battery

A lithium-ion battery and waste technology, which is applied in the field of lithium-ion battery recycling and processing, can solve problems such as nickel-cobalt lithium manganese oxide positive electrode materials and lithium carbonate that have not been seen yet.

Inactive Publication Date: 2018-10-26
GUANGXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] After searching, the applicant has not yet seen relevant reports on the simultaneous preparation of nickel-cobalt lithium manganese oxide positive electrode materials and lithium carbonate by using waste lithium-ion batteries

Method used

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  • Recycling method for waste lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] (1) Take the waste nickel-cobalt manganese oxide lithium battery and the waste lithium iron phosphate battery, discharge according to the conventional method, then disassemble, collect the battery cells, and set them aside;

[0054] (2) Pulverize the battery cells, discharge the diaphragm scraps of the pulverized material through winnowing, and then sieve (screen 150 mesh) the remaining pulverized material to obtain a mixture containing copper foil and aluminum foil and black powder; The mixture with aluminum foil is sent to the gravity separator for gravity separation to obtain copper foil and aluminum foil respectively.

[0055] (3) Take the black powder and place it in the first stirred tank, then add hydrochloric acid solution (5mol / L), the dosage ratio of the black powder and hydrochloric acid solution is 1kg: 20L, heat up to 70°C and stir for 2h, and the reaction The resulting material is discharged, filtered, and the filter residue and filtrate are collected resp...

Embodiment 2

[0066] (1) Take the waste nickel-cobalt lithium manganese oxide battery and the waste lithium iron phosphate battery and discharge them according to the conventional method, then disassemble them, first remove the shell, take out the batteries, collect the batteries, and set them aside;

[0067] (2) Pulverize the battery cells, discharge the diaphragm scraps of the pulverized material through winnowing, and then sieve (screen 250 mesh) the remaining pulverized material to obtain a mixture containing copper foil and aluminum foil and black powder; The mixture with aluminum foil is sent to the gravity separator for gravity separation to obtain copper foil and aluminum foil respectively;

[0068] (3) Get the black powder and place it in the first stirred tank, then add sulfuric acid solution (3mol / L) and hydrogen peroxide (hydrogen peroxide content is 30w / w%), the consumption ratio of the black powder, sulfuric acid solution and hydrogen peroxide 1kg: 10L: 30L, heat up to 50°C an...

Embodiment 3

[0079] Repeat Example 1, the difference is:

[0080] Step (1) is performed as follows:

[0081] (1.1) Take the waste nickel-cobalt lithium manganese oxide battery and the waste lithium iron phosphate battery and mix them together, put them into the airtight discharge battery, pour water into the discharge battery, make the battery completely submerged in water, soak the battery in water for 5 days, collect The gas released during the battery soaking (discharging) process is sent to the condenser for condensation; after soaking, the solid and liquid are collected separately to obtain the discharged battery and the solution containing the electrolyte;

[0082] (1.2) Place the discharged battery in an electric dryer, dry it at 100°C for 4 hours, collect the gas generated during the drying process, and send it to a condenser for condensation; after drying, obtain a dried battery;

[0083] (1.3) Send the dried battery into the glove box for disassembly, remove the shell of the bat...

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Abstract

The present invention discloses a recycling method for a waste lithium ion battery. The method comprises: firstly conducting crushing, screening and wind separation on a collected electric core afterdischarging and disassembling a waste battery to respectively obtain a copper foil, an aluminum foil, a diaphragm and black powder; dissolving the obtained black powder using acid; burning an undissolved part in a combustion furnace; producing lithium carbonate using generated gas; separating nickel, cobalt, manganese, lithium, iron and aluminum from a solution subjected to acid dissolution usingan extraction method for use in production of cathode material of nickel-cobalt lithium manganate, nickel salt, cobalt salt, manganese salt, ferric hydroxide, aluminum hydroxide, cobaltosic oxide andother products. The method of the present invention recycles the copper foil, the aluminum foil, the cathode material and anode material in the waste battery. The cathode material and the anode material are processed to prepare ternary cathode material of the nickel-cobalt lithium manganite, and the nickel salt, the cobalt salt and the manganese salt.

Description

technical field [0001] The invention relates to the recovery and treatment of lithium-ion batteries, in particular to a method for recycling waste lithium-ion batteries. Background technique [0002] In recent years, thanks to the continuous policy support of the Chinese government, the gradual strengthening of the public's awareness of environmental protection, and the continuous efforts of a number of domestic universities, research institutes and enterprises in the research and development of power batteries, battery management systems, etc., my country's The electric vehicle market has developed rapidly. With the rapid industrialization of new energy vehicles, their sales will increase by leaps and bounds, and the stock of lithium-ion power batteries will also increase exponentially. At the same time, the problem of environmental pollution of waste lithium-ion power batteries and the problem of rational recycling of resources have become common concerns and problems that...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54H01M10/0525
CPCH01M10/0525H01M10/54Y02E60/10Y02W30/84
Inventor 刘葵李庆余王红强黄有国吴强杨生龙张鹏宋春红
Owner GUANGXI NORMAL UNIV
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