Method and device for safety treatment on lithium ion battery before recovery and recycling, and lithium ion battery safe recovery method

A lithium-ion battery, safe disposal technology, applied in the field of safe disposal of lithium-ion batteries before recycling, can solve fire, explosion, affect the efficiency and flexibility of battery dismantling, cannot fundamentally eliminate fire operators, etc. problems, to achieve high safety, improve safety and dismantling efficiency, and the effect of appropriate reaction rate

Active Publication Date: 2017-07-11
CHINA AVIATION LITHIUM BATTERY LUOYANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] During the dismantling process of lithium-ion battery cells, due to the irreversible lithium (residual lithium) in the cells that cannot return to the positive electrode material due to the cycle process, it is easy to cause safety problems such as fire and explosion; at the same time, the LiPF in the cells 6 When exposed to the air, it is easy to react with water vapor to produce toxic gases such as HF. The above factors lead to the dismantling process of lithium-ion battery cells needing to be carried out in a protective atmosphere, so as to ensure the safety of the dismantling process. To a large extent, it affects the efficiency and flexibility of battery dismantling, and it cannot fundamentally eliminate safety hazards such as fires and toxic and harmful volatile organic compounds that endanger operators.

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  • Method and device for safety treatment on lithium ion battery before recovery and recycling, and lithium ion battery safe recovery method
  • Method and device for safety treatment on lithium ion battery before recovery and recycling, and lithium ion battery safe recovery method

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Embodiment 1

[0044] The safety treatment device before the lithium-ion battery recycling of the present embodiment, such as figure 2 As shown, it includes impregnation liquid storage tank 1, impregnation tank 2, impregnation waste liquid storage tank 3, condenser 4, vacuum equipment 5 and purification system 6, and the outlet of the impregnation liquid storage tank and the entrance of the impregnation tank pass through the first connecting pipe connected to each other, and used to pass the immersion liquid in the immersion liquid storage tank into the immersion tank; the immersion tank has a drain port, and the drain port communicates with the entrance of the immersion waste liquid storage tank through a second connecting pipe, It is used to discharge the impregnation waste liquid produced by impregnation in the impregnation tank into the impregnation waste liquid storage tank; the impregnation tank is also provided with an air outlet, and the air outlet is connected with the inlet of the ...

Embodiment 2

[0046] The safety treatment method before lithium ion battery recycling of the present invention, process flow chart is as follows figure 1 As shown, the safety handling device adopted is as follows figure 2 shown, including the following steps:

[0047] 1) Put the cell with the battery shell removed into the dipping tank, vacuumize the tank to -0.08MPa, and then add a sufficient amount of dipping solution to the dipping tank for dipping treatment, the dipping solution has a mass ratio of 95: 5 mixture of ethanol and water; vacuumize the dipping tank to maintain a vacuum of -0.095MPa, after soaking for 2 hours, open the drain valve of the dipping tank, and discharge the soaking waste liquid after the dipping treatment through the second pumping pump , close the drain valve;

[0048] 2) Vacuum the impregnation tank, and keep the vacuum at -0.05MPa. When the system has flowing impregnation waste liquid, stop vacuuming, open the drain valve of the impregnation tank, and drain ...

Embodiment 3

[0052] The safety treatment method before lithium ion battery recycling of the present embodiment, process flow chart is as follows figure 1 As shown, the safety handling device adopted is as follows figure 2 shown, including the following steps:

[0053] 1) Put the open battery into the impregnation tank, vacuumize the impregnation tank so that the vacuum degree is -0.05MPa, and keep the pressure for 5 minutes;

[0054] 2) adding a sufficient amount of dipping liquid into the dipping tank for dipping treatment, the dipping liquid is a mixture of ethanol and water with a mass ratio of 75:25; vacuumize the dipping tank to keep the vacuum degree not higher than -0.09MPa, After soaking for 0.5h, discharge the soaking waste liquid after soaking treatment;

[0055] 3) Vacuum the impregnation tank and keep the vacuum degree not higher than -0.09MPa. When the system has flowing impregnation waste liquid, stop vacuuming and discharge the impregnation waste liquid; after repeating t...

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Abstract

The invention relates to a method and device for safety treatment on a lithium ion battery before recovery and recycling, and a lithium ion battery safe recovery method. The method for safety treatment comprises 1) placing an open lithium ion battery or cell in a sealed cavity, and carrying out vacuum pumping on the sealed cavity, and 2) adding an immersion liquid into the sealed cavity, carrying out immersion treatment, wherein the immersion liquid is a mixed solution of water-soluble organic matters and water according to a mass ratio of (3-19): 1, and discharging the immersion waste liquid. The method for safety treatment utilizes the mixed solution of water-soluble organic matters and water as a treatment liquid so that a residual lithium reaction rate in water and cell is reduced, enrichment of flammable gas such as H and heat is avoided and safety is high. The method can realize thorough elimination of residual lithium and LiPF6. The treated battery or cell can be dismantled or crushed without a protection atmosphere so that safety and dismantling efficiency of the later cell dismantling and recovery processes are improved.

Description

technical field [0001] The invention belongs to the technical field of recycling lithium-ion power batteries, and in particular relates to a safe treatment method and device for lithium-ion batteries before recycling, and a safe recycling method for lithium-ion batteries. Background technique [0002] With the vigorous promotion of new energy vehicles by the Chinese government, especially the encouragement and support of lithium-ion power battery vehicles, a large number of waste lithium-ion power batteries will be produced in the future. Because the raw materials of lithium-ion batteries contain a large amount of rare and precious metals such as nickel, cobalt, copper, and lithium, and the scrapped lithium-ion batteries contain flammable electrolytes and highly toxic LiPF 6 Therefore, improper recycling of waste lithium-ion power batteries will not only cause waste of resources, but also cause certain pollution problems. [0003] Although there are currently some methods i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54
CPCH01M10/54Y02W30/84
Inventor 李肖肖郭盛昌王楠李新旺
Owner CHINA AVIATION LITHIUM BATTERY LUOYANG
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