Automatic pre-lithiation method for industrial application of lithium battery and preparation method

A lithium battery, automatic technology, applied in the manufacture of lithium batteries, electrolyte batteries, secondary batteries, etc.

Pending Publication Date: 2021-11-30
慈溪斯昂尼电池有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

b class="d_n">[0003] The present invention requires a method for automatic pre-lithiation of lithium batteries that can be used industrially to solve the problem of pre-lithiation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0006] An embodiment of this method is to purchase a sandwich structure for the lithium battery winding core fixing adhesive in the lithium battery packaging stage, and the middle interlayer is a pre-lithiated lithium source material, which is sandwiched by a buffer layer protective layer with ion and electronic conductivity. In the single-sided adhesive, one side of the adhesive can be a polymer material that conducts both electrons and ions, and the other side is a core rubber or a buffer layer protective layer modified with a core rubber.

[0007] In one embodiment of the method, the buffer layer protection layer is formed of an ion-conducting polymer with an additive material for conducting electrons. One example is that the ion-conducting polymer is polyvinylidene chloride (PVDF), polyvinylidene chloride-hexafluoropropylene (PVDF-HFP), polytetrafluoroethylene (PTFE), polyethylene oxide, polyester, poly Amide, polyamideimide, polymethylmethacrylate, polycarbonate, carboxym...

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Abstract

The invention relates to an automatic pre-lithiation method for industrial application of a lithium battery and a preparation method. A lithium source pre-embedded with lithium is applied to materials in the assembling and packaging stages. Sealing is conducted quickly, then the standing formation time ranges from 24 h to 48 h, high-quality pre-physicochemical can be achieved, and meanwhile the production takt is not affected. The pre-lithiation material and the processing steps are all concentrated to the final assembling and packaging link of the lithium battery in a lithium battery production line, so that the time for the pre-lithiation process to be in contact with water and oxygen in the environment is shortest, meanwhile, the compatibility to the production line is highest, and the influence on the production takt is minimum or completely not influenced. According to the method disclosed by the invention, the lithium source material required by pre-lithiation is not applied to a positive plate, a negative plate and a diaphragm in a previous pulping process and a flaking process of the lithium battery, but is applied to a subsequent assembling and packaging process. When the materials used in the subsequent assembling and packaging process are applied, a lithium source pre-embedded with lithium can be stabilized.

Description

technical field [0001] The invention relates to an industrially applicable automatic pre-lithiation method and preparation method of lithium batteries, which belong to the technical field of lithium batteries. Background technique [0002] At present, the pre-lithiation of lithium batteries has been a focal issue. Pre-lithiation can greatly improve the first-time efficiency of the battery negative electrode material and the first-time efficiency of the full battery, and can also improve many other properties at the same time. Taking cylindrical lithium-ion batteries, especially 18650 cylindrical lithium-ion batteries, 21700 batteries and 4680 batteries as examples, they are generally composed of positive electrodes, negative electrodes, diaphragms, electrolytes (or solid electrolytes), and casings. The shell is composed of a cylindrical shell and a cap on the top of the shell. At present, there is no good pre-lithiation solution for existing cylindrical batteries. The exi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058H01M10/0587H01M10/052
CPCH01M10/058H01M10/0587H01M10/052Y02E60/10Y02P70/50
Inventor 马昕
Owner 慈溪斯昂尼电池有限公司
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