Intrinsic safety treatment method for edge metal in decommissioned battery pole piece and application

A processing method and intrinsically safe technology, applied in the field of intrinsically safe processing of edge metals in retired battery pole pieces, can solve problems such as explosion and combustion, and achieve the effects of high activity, low processing cost and environmental friendliness

Active Publication Date: 2021-08-27
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since there will be acid and water remaining after the aluminum slag is washed, the sorted aluminum slag will react with the residual acid and water, release hydrogen and generate heat, and there is a risk of combustion and explosion when the aluminum slag is stored
At the same time, there is metal aluminum left in the battery powder obtained by sorting. In the next step of acid leaching, the residual metal aluminum will react with acid to release hydrogen gas, which makes the acid leaching process have the risk of combustion and explosion.
[0004] The above two traditional production processes have obvious limitations, especially in industrial production, the residual metal aluminum will react with acid or water to release hydrogen, and there is a risk of combustion and explosion during storage

Method used

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  • Intrinsic safety treatment method for edge metal in decommissioned battery pole piece and application
  • Intrinsic safety treatment method for edge metal in decommissioned battery pole piece and application
  • Intrinsic safety treatment method for edge metal in decommissioned battery pole piece and application

Examples

Experimental program
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Effect test

Embodiment 1

[0052] The intrinsically safe treatment method for the edge metal in the decommissioned battery pole piece of this embodiment includes the following specific steps:

[0053] (1) Cut the waste electrode sheet to a strip with a length of 50 mm and a width of 2 mm;

[0054] (2) Put the strip into the hydrothermal reaction kettle, the addition of the strip is 20% of the volume of the reaction kettle, add water according to the filling degree of 50%, and close the hydrothermal reaction kettle;

[0055] (3) Put the hydrothermal reaction kettle in the ultrasonic generator, heat the hydrothermal reaction kettle to 180°C in an oil bath in the ultrasonic generator, turn on the ultrasonic, control the ultrasonic power to 28kHz, and ultrasonically treat for 10 hours. Cool to room temperature to obtain pretreated aluminum slag;

[0056] (4) Take out the hydrothermal reaction kettle, filter the internal materials of the reaction kettle, rinse with water and then filter again, repeat severa...

Embodiment 2

[0063] The intrinsically safe treatment method for the edge metal in the decommissioned battery pole piece of this embodiment includes the following specific steps:

[0064] (1) Cut the waste electrode sheet to a strip with a length of 2mm and a width of 20mm;

[0065] (2) Put the strip into the hydrothermal reactor, the addition of the ribbon is 30% of the volume of the reactor, add water according to the filling degree of 60%, and close the hydrothermal reactor;

[0066] (3) Put the hydrothermal reaction kettle in the ultrasonic generator, heat the hydrothermal reaction kettle to 150°C in an oil bath in the ultrasonic generator, turn on the ultrasonic, control the ultrasonic power to 40kHz, and ultrasonically treat for 2 hours. Cool to room temperature to obtain pretreated aluminum slag;

[0067] (4) Take out the hydrothermal reaction kettle, filter the internal materials of the reaction kettle, rinse with water and then filter again, repeat several times, take the strip on...

Embodiment 3

[0074] The intrinsically safe treatment method for the edge metal in the decommissioned battery pole piece of this embodiment includes the following specific steps:

[0075] (1) Cut the waste electrode sheet to a strip with a length of 2mm and a width of 40mm;

[0076] (2) Put the strip into the hydrothermal reaction kettle, the addition of the strip is 50% of the volume of the reaction kettle, add water according to the filling degree of 80%, and close the hydrothermal reaction kettle;

[0077](3) Put the hydrothermal reaction kettle in the ultrasonic generator, heat the hydrothermal reaction kettle to 120°C in an oil bath in the ultrasonic generator, turn on the ultrasonic, control the ultrasonic power to 80kHz, and ultrasonically treat for 0.5h. Cool naturally to room temperature to obtain pretreated aluminum slag;

[0078] (4) Take out the hydrothermal reaction kettle, filter the internal materials of the reaction kettle, rinse with water and then filter again, repeat sev...

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Abstract

The invention belongs to the technical field of battery recovery, and discloses an intrinsic safety treatment method for edge metal in a decommissioned battery pole piece and application. The method comprises the following steps: cutting a waste pole piece into non-powder, then placing the non-powder in an ultrasonic environment, heating in an oil bath, carrying out a hydrothermal reaction, and cooling to prepare pretreated aluminum slag; taking out the pretreated aluminum slag for filtering, and taking out and washing filter residues to obtain aluminum slag and a battery powder turbid solution; and inserting a grounding wire into the aluminum slag, and introducing an oxidizing agent for reaction to obtain the non-hydrogen-release aluminum slag. The battery powder and the aluminum foil in the waste pole piece are separated through a physical method, chemical agents do not need to be added, and the treatment cost is low. The solution obtained after hydrothermal reaction and water washing can be used as a raw material and an auxiliary material of the leachate, secondary waste water, waste gas and waste residues cannot be generated in the whole treatment process, and the treatment process is environmentally friendly.

Description

technical field [0001] The invention belongs to the technical field of battery recycling, and in particular relates to an intrinsically safe treatment method and application for edge metals in decommissioned battery pole pieces. Background technique [0002] In the manufacturing process of lithium-ion batteries, a certain amount of waste pole pieces will be produced in the pole piece production process. In the case of large-scale production and manufacture of lithium-ion batteries, a large number of waste pole pieces will be produced. [0003] The traditional waste pole piece recycling process is to crush the pole piece, and then carry out the next step of high-temperature pyrolysis, the binder will fail, and the battery powder will be separated from the aluminum foil. The pyrolysis temperature is generally 300-500°C, and the pyrolysis process will This causes the metal aluminum foil to react with oxygen in the air environment, which not only reduces the recovery rate of me...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B21/00C22B23/00C22B26/12C22B47/00H01M10/54
CPCC22B7/005C22B7/006C22B21/0023C22B23/043C22B23/0446C22B47/00C22B26/12H01M10/54Y02W30/84Y02P10/20
Inventor 余海军戴宏亮
Owner HUNAN UNIV
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