A method for reclaiming and separating positive pole pieces from waste lithium-ion batteries

A lithium-ion battery and positive pole piece technology, which is applied in the field of recovery and separation of positive pole pieces, can solve problems such as unsatisfactory lithium iron phosphate and difficulty in ensuring product consistency, and achieve low cost, simple method, and large market prospects Effect

Active Publication Date: 2015-12-02
内蒙古斯诺新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the great variation in the quality of raw materials, it is difficult to guarantee the consistency of the product, which cannot meet the needs of industrialized large-scale production and recovery of lithium iron phosphate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 5,000 pieces of waste cylindrical lithium with a model of 18650, an original capacity of 2000-2200mAh, a positive electrode made of lithium cobalt oxide, and a coating amount of the positive electrode sheet of 12g-17g (about 60Kg-85Kg positive electrode and 6.5-8.0Kg aluminum foil can be recovered) The ion battery is tested for voltage, and the battery that still contains a voltage above 2.0V is discharged, and then the battery is dismantled, and the battery cell is taken out, and then baked at a temperature of 80°C for 2 hours to make the excess The electrolyte was dried and volatilized, then the cell was removed, the positive electrode was taken out, and the aluminum lugs and high-temperature tape on the electrode were removed. A total of 72.5Kg of the electrode containing the positive active material and aluminum foil was received. Treat at 450°C for 0.5h to completely separate the positive electrode active material from the aluminum foil substrate (the aluminum foil ...

Embodiment 2

[0032]10,000 pieces of waste square aluminum with a model number of 523450, an original capacity of 1000-1100mAh, a positive electrode made of lithium cobalt oxide, and a coating amount of the positive electrode plate of 6.5g-9g (about 65Kg-90Kg positive electrode and 6.8-8.3Kg aluminum foil can be recovered) Lithium-ion batteries in the shell, conduct voltage detection, discharge the batteries that still contain voltages above 2.0V, and then dismantle the batteries, take out the batteries, and bake them at 70°C for 1 hour to make them The excess electrolyte was dried and volatilized, and then the cell was removed, the positive plate was taken out, and the aluminum lugs and high-temperature tape on the plate were removed. A total of 96.3Kg of the plate containing the positive active material and aluminum foil was received. The pole piece was treated at 450°C for 1.0h to completely separate the positive active material from the aluminum foil substrate (the aluminum foil was recy...

Embodiment 3

[0034] 5,000 cylinders with a model of 32650, an original capacity of 5,000-5,100mAh, a positive electrode made of lithium iron phosphate, and a coating amount of the positive electrode sheet of 33.5g-36.5g (roughly 165Kg-180Kg positive electrode and 16.8-18.3Kg aluminum foil can be recovered) For lithium-ion batteries with steel shells, conduct voltage detection, discharge the batteries that still contain voltages above 2.0V, and then dismantle the batteries, take out the batteries, and bake them at 75°C for 1 hour. Let the excess electrolyte dry and volatilize, then remove the battery, take out the positive electrode piece, and remove the aluminum tab and high-temperature tape on the electrode piece, and receive a total of 189.3Kg of the electrode piece containing the positive electrode active material and aluminum foil , Treat the pole piece at 500°C for 0.5h to completely separate the positive electrode active material from the aluminum foil substrate (the aluminum foil is ...

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Abstract

The invention discloses a method for recovering and separating an anode pole piece from a waste and old lithium ion battery. The method comprises the steps: carrying out voltage detection of the waste and old lithium ionic battery, dismantling the battery, removing an electric core of the battery, and completely separating an anode material of the anode pole piece from an aluminum foil by high temperature treatment. The method is the simple and easy method, does not require any organic solvents in the treatment process, cannot produce dust, and is more environmentally friendly compared with a conventional separation process. At the same time, waste and old resource recycling is a way of protection of existing resources, and ensures long-term development of lithium ion battery industries.

Description

technical field [0001] The invention relates to a method for recovering and separating positive pole pieces from waste lithium ion batteries, in particular to separating the positive active material on the positive pole pieces in the waste batteries from the aluminum foil of the matrix. Background technique [0002] Lithium-ion batteries have been widely used due to their high energy density, light weight, long life and no memory effect since they were industrialized by Sony Corporation in 1992. And the global lithium battery market is basically dominated by Japan. In recent years, with the rapid rise of China and South Korea, the market share of Japanese lithium batteries has gradually decreased. The global lithium battery industry has formed a three-point pattern of China, Japan and South Korea. With the development of portable electrical equipment such as mobile phones and notebook computers, the global lithium-ion battery market has a large scale. [0003] At present, l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54
CPCY02W30/84
Inventor 鲍海友田东谌江宏谭建可鲍丹张贵萍
Owner 内蒙古斯诺新材料科技有限公司
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