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A kind of polymer lithium ion battery and preparation method of polymer lithium ion battery

A lithium-ion battery and polymer technology, applied in secondary batteries, battery pack components, circuits, etc., can solve the problems of unable to prevent side reactions, diaphragm shrinkage, short-circuits, etc. of lithium-ion batteries, so as to increase production processes and improve safety. The effect of sex, simple craftsmanship

Active Publication Date: 2022-03-25
ZHUHAI COSMX BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the diaphragm used in the chemical system of polymer lithium-ion batteries has developed into the form of base film + ceramics + glue, but this form is mainly improved from a physical point of view. This form of improvement cannot prevent lithium-ion batteries from Side reactions occur at high temperatures. Once an accident occurs in the battery cell, the internal temperature of the battery cell will rise rapidly, which will cause the diaphragm to shrink, cause an internal short circuit, and then cause safety accidents such as fire.

Method used

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  • A kind of polymer lithium ion battery and preparation method of polymer lithium ion battery
  • A kind of polymer lithium ion battery and preparation method of polymer lithium ion battery

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specific Embodiment approach 1

[0017] Embodiment 1: This embodiment describes a polymer lithium ion battery, including a positive electrode, a negative electrode, a diaphragm, an electrolyte, a tab, an aluminum plastic film, etc., using the product of the Diels-Alder reaction, the combination of the product and the raw material, The combination of product and ceramic or the combination of product, raw material and ceramic is used as the coating layer of the separator, the material of the coating layer is selected to be able to introduce Diels-Alder reaction (Diels-Alder reaction) to polymer lithium ions in the battery chemistry.

specific Embodiment approach 2

[0018] Embodiment 2: In the polymer lithium ion battery described in Embodiment 1, the raw materials are conjugated dienes and substituted olefins, both of which can undergo Diels-Alder reaction, and the two raw materials are preferably one: Solid state, one is liquid state, and the reaction temperature range is 60~130℃.

specific Embodiment approach 3

[0019] Embodiment 3: The polymer lithium ion battery described in Embodiment 2, the raw material is any one of the following three types: (1) cyclopentadiene and pyridyl thiocarbamate; (2) Furan-based epoxy resin and maleic anhydride; (3) Furfuryl amine and bisphenol A epoxy resin.

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Abstract

A polymer lithium ion battery and a preparation method for the polymer lithium ion battery belong to the technical field of polymer lithium batteries. The products of the Diels-Alder reaction or a combination of products and raw materials are used as the coating layer of the separator. The method is as follows: DGFA and DPMBMI are used to prepare product X through Diels-Alder reaction, product X is used as the main material, and a suitable formula is selected to prepare diaphragm slurry; then the slurry is coated on the diaphragm, and the diaphragm The other components of the battery are wound into a battery according to the conventional method. The method of the present invention has low cost, does not increase the production cost of the existing mass-produced batteries, and has a simple process, does not increase additional production processes, is beneficial to realize mass production, and has strong feasibility. The present invention is realized by combining the two advantages of physical and chemical reactions, improves the safety of the battery, can effectively reduce the internal temperature of the battery core, and avoid safety accidents such as fire of the battery core.

Description

technical field [0001] The invention belongs to the technical field of polymer lithium batteries, and particularly relates to a polymer lithium ion battery and a preparation method of the polymer lithium ion battery. Background technique [0002] With the increasing awareness of environmental protection, the use of toxic metals such as lead and cadmium is increasingly restricted, so it is necessary to find new rechargeable batteries that can replace traditional lead-acid batteries and nickel and cadmium batteries. Lithium secondary batteries are naturally the most powerful candidates due to their high energy density and long cycle life. Now, the 5G era is coming, and it is more and more urgent to choose a more suitable new generation of rechargeable batteries. It is worth looking forward to, the advantages of lithium-ion batteries make this hope more and more realistic. [0003] However, the frequent explosion of lithium-ion battery leakage, fire and other accidents in rec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M50/446H01M50/434H01M50/414H01M50/417H01M50/403H01M10/0525H01M10/0587
CPCH01M10/0587H01M10/0525H01M50/403H01M50/446H01M50/411H01M50/449Y02E60/10Y02P70/50
Inventor 陈博彭冲李俊义徐延铭
Owner ZHUHAI COSMX BATTERY CO LTD
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