Method for comprehensive harmless recovery and utilization of waste lithium ion power battery

A lithium-ion battery and power battery technology, applied in battery recycling, recycling technology, recycling by waste collectors, etc., can solve the problems of low added value of products, waste of resources, unfeasible, etc., and achieve a favorable workshop working environment. , avoid burning or explosion, reduce the effect of harm to human body

Active Publication Date: 2016-03-23
北京赛德美资源再利用研究院有限公司
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Problems solved by technology

[0004] Patent CN101847763A (a comprehensive recovery method for waste lithium ferrous phosphate battery), patent CN102738539A (method and device for recycling lithium iron phosphate material from the positive plate of waste lithium iron phosphate battery), patent CN102208706A (a waste ferrous phosphate battery Recycling and repairing treatment method of lithium battery positive electrode material), patent CN102208707A (a method for repairing and repairing waste lithium iron phosphate positive electrode material), patent CN102403554A (recycling method for waste lithium iron Recycling method of lithium ferrous phosphate battery), patent CN102751548A (a method of recycling and preparing lithium ferrous phosphate from waste lithium iron phosphate battery), patent CN103449395A (a recovery and repair of positive electrode Material method), etc. are mainly to peel off the positive electrode material through a wet process, and then use the peeled positive electrode material as a raw material, add Fe source, P source or Li source according to the ratio, mix evenly in a certain way, and then sinter at high temperature to synthesize phosphorous acid Lithium iron, these methods all have a wet stripping process, there is a consumption of various reagents or solvents, and the electrolyte and electrolyte in the power battery will enter the solution and be difficult to recover, which may cause water pollution
[0005] Patent CN102017276A (recycling method of waste lithium ferrous phosphate power battery) directly utilizes the positive plate in the waste battery and remakes the battery. The pass rate of the battery is low, resulting in a huge waste of resources; patent CN102956936A (a method for t

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  • Method for comprehensive harmless recovery and utilization of waste lithium ion power battery
  • Method for comprehensive harmless recovery and utilization of waste lithium ion power battery
  • Method for comprehensive harmless recovery and utilization of waste lithium ion power battery

Examples

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Embodiment 1

[0042] (1) Take a set of 320V60Ah waste lithium iron phosphate lithium-ion power battery packs (graphite negative electrodes) for electric vehicles, disassemble the waste power battery packs, measure the performance of each battery, the capacity is more than 60% of the original nominal capacity and Single batteries whose resistance does not exceed 3 times the original nominal value shall be reconfigured according to the rules of capacity error within ±2%, internal resistance error within ±30%, leakage current error within ±20%, and charge-discharge curve coincidence degree greater than 95%. into a 72V100Ah battery pack, and the reassembled battery is used for low-speed electric vehicles;

[0043] (2) Discharge the waste power batteries eliminated in (1) until the voltage is <0.5V;

[0044] (3) In an oxygen-isolated environment, cut the battery along the top of the battery by cutting, cut off the connection between the core pack and the terminal, open the battery and take out t...

Embodiment 2

[0055] (1) Take a set of 370V100Ah waste ternary lithium-ion power battery packs (lithium titanate negative electrode) for electric vehicles, disassemble the waste power battery packs, and measure the performance of each battery. The capacity is more than 60% of the original nominal capacity and within Single batteries whose resistance does not exceed 3 times the original nominal value shall be reconfigured according to the rules of capacity error within ±2%, internal resistance error within ±30%, leakage current error within ±20%, and charge-discharge curve coincidence degree greater than 95%. into a 74V160Ah battery pack, and the reassembled battery is used for low-speed electric vehicles;

[0056] (2) Discharge the waste power batteries eliminated in (1) until the voltage is <0.5V;

[0057] (3) In an oxygen-isolated environment, cut the battery along the top of the battery by cutting, cut off the connection between the core pack and the terminal, open the battery and take o...

Embodiment 3

[0067] (1) Take a set of 370V100Ah waste lithium manganese oxide power battery packs (graphite negative electrodes) for electric vehicles, disassemble the waste power battery packs, and measure the performance of each battery. The capacity is more than 60% of the original nominal capacity and the internal resistance does not exceed The single battery with 3 times the original nominal value shall be re-made into 74V160Ah according to the rules of capacity error within ±2%, internal resistance error within ±30%, leakage current error within ±20%, and charge-discharge curve coincidence degree greater than 95%. Battery packs, repackaged batteries for low-speed electric vehicles;

[0068] (2) Discharge the waste power batteries eliminated in (1) until the voltage is <0.5V;

[0069] (3) In an oxygen-isolated environment, cut the battery along the top of the battery by cutting, cut off the connection between the core pack and the terminal, open the battery and take out the core pack;...

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Abstract

The present invention relates to a method for comprehensive harmless recovery and utilization of a waste lithium ion power battery. The method comprises the following steps: disassembling a waste battery pack, and measuring and collecting good battery cells to re-combine the good batteries for gradient utilization; sufficiently discharging defective waste lithium ion power battery cells, and disassembling the power battery cells in an oxygen-isolated environment; performing heat treatment on a fetched core pack in a heating furnace, and collecting a distilled solvent by means of condensation; disassembling the core pack from which the solvent is distilled off to obtain a membrane material, a positive electrode plate and a negative electrode plate; placing the positive electrode plate and the negative electrode plate in a rotary kiln of 200-600 DEG C to be subjected to heat treatment; sorting electrode plates, which have been subjected to the heat treatment, by using a pulverizer and a powder sorter separately, so as to obtain an aluminum powder, a copper powder, a waste positive electrode powder and a waste negative electrode powder; and repairing the positive electrode powder and the negative electrode powder separately. According to the method provided by the present invention, a fully-dry closed-circuit recovery process is adopted, thereby achieving the harmless recovery and utilization of the waste lithium ion power battery.

Description

technical field [0001] The invention belongs to the technical field of recovery of lithium-ion power batteries, in particular to gradient utilization and harmless comprehensive recovery treatment of waste lithium-ion power batteries. Background technique [0002] With the increasingly prominent energy issues and the increasing attention to environmental issues, the electric vehicle industry has adapted to the historical development trend and expanded rapidly by leaps and bounds. Lithium-ion batteries have received widespread attention because of their high energy density, good safety performance, and no memory effect. Among them, lithium-ion batteries that use lithium iron phosphate as the positive electrode material have a stable discharge platform and high safety performance. In the field of power batteries, it is increasing day by day. Electric vehicles are a major direction for the future development of China's automobiles. According to the "Twelfth Five-Year Special Pl...

Claims

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Application Information

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IPC IPC(8): H01M10/54H01M10/0525
CPCH01M10/0525H01M10/54Y02E60/10Y02W30/84
Inventor 李荐周宏明程磊
Owner 北京赛德美资源再利用研究院有限公司
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