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A fast-chargeable lithium-ion battery negative plate

A lithium-ion battery, fast charging technology, applied in battery electrodes, secondary batteries, secondary battery repair/maintenance, etc., can solve problems such as unfavorable normal use of equipment, restrict the use of lithium-ion batteries, etc., and achieve good high-rate charging performance , long cycle charge and discharge life, improve the effect of charging performance

Active Publication Date: 2022-04-08
佛山市实达科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, low current and long-term charging seriously limit the use of lithium-ion batteries, such as emergency medical equipment, electric vehicles, communications, aerial photography, etc. Long-term charging is not conducive to the normal use of equipment

Method used

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  • A fast-chargeable lithium-ion battery negative plate
  • A fast-chargeable lithium-ion battery negative plate
  • A fast-chargeable lithium-ion battery negative plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1 A rapidly chargeable lithium-ion battery negative electrode

[0027] Negative electrode raw material formula: ingredient 1, ingredient 2;

[0028] The ingredient 1 contains the following raw materials in parts by weight: 93 parts of negative electrode active material, 0.5 part of CMC, 0.35 part of SBR, 2.5 parts of conductive carbon black, and 10 parts of water;

[0029] The batching 2 contains the following raw materials in parts by weight: 92.5 parts of negative electrode active material, 3.8 parts of PVDF, 7.8 parts of conductive carbon black, and 10.4 parts of N-methyl-2-pyrrolidone;

[0030] The negative electrode active material is composed of artificial graphite and mesocarbon microspheres in a mass ratio of 1:1.1, and the particle diameter D50 of artificial graphite and mesocarbon microspheres is 10.0 μm;

[0031] The mass ratio of ingredient 1 to ingredient 2 used is 1:1.2.

[0032] The preparation method of the battery negative plate, the specific ...

Embodiment 2

[0036] Example 2 A rapidly chargeable lithium-ion battery negative electrode

[0037] The difference between Example 2 and Example 1 is that the content of the negative electrode raw material formulation components is different, wherein the ingredients 1 contains the following raw materials in parts by weight: 90 parts of negative electrode active material, 0.2 part of CMC, 0.1 part of SBR, 1 part of conductive carbon black, 8 parts of water; batching 2 includes the following raw materials by weight: 90 parts of negative electrode active material, 3 parts of PVDF, 6 parts of conductive carbon black, 8.5 parts of N-methyl-2-pyrrolidone; the rest of the methods and steps are the same as in Example 1.

Embodiment 3

[0038] Example 3 A rapidly chargeable lithium-ion battery negative electrode

[0039] The difference between embodiment 3 and embodiment 1 is that the content of negative electrode raw material formulation components is different, wherein batching 1 contains the following raw materials by weight: 95 parts of negative electrode active material, 0.8 part of CMC, 0.5 part of SBR, 3.5 parts of conductive carbon black, 12 parts of water; batching 2 includes the following raw materials in parts by weight: 95 parts of negative electrode active material, 6.5 parts of PVDF, 8.8 parts of conductive carbon black, and 12.5 parts of N-methyl-2-pyrrolidone; the remaining methods and steps are the same as in Example 1.

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Abstract

The present invention relates to the technical field of lithium-ion batteries, in particular to a fast-chargeable lithium-ion battery negative electrode sheet. The lithium-ion battery negative electrode sheet includes ingredients 1 and 2, and the ingredient 1 includes the following raw materials: negative electrode active material, CMC, SBR, conductive carbon black, water; the batching 2 includes the following raw materials: negative electrode active material, PVDF, conductive carbon black, N-methyl-2-pyrrolidone; fast-chargeable lithium-ion battery negative electrode according to the present invention The preparation method of the sheet, through the scientific proportion design of the ingredients of the negative electrode, and the negative electrode sheet of the battery prepared according to the preparation method of the present invention is used in the lithium battery, so that the battery can have good high-rate charging performance , At the same time, the temperature rise of the battery surface is low during the charging process, the cycle charge and discharge life is long, and there is no lithium analysis phenomenon, which improves the charging performance of the battery.

Description

technical field [0001] The invention relates to the technical field of lithium-ion batteries, in particular to a fast-chargeable lithium-ion battery negative electrode sheet. Background technique [0002] Lithium battery is a type of battery that uses lithium metal or lithium alloy as the negative electrode material and uses a non-aqueous electrolyte solution. In 1912, the lithium metal battery was first proposed and studied by Gilbert N. Lewis. In the 1970s, M. S. Whittingham proposed and began to study lithium-ion batteries. Due to the very active chemical properties of lithium metal, the processing, storage and use of lithium metal have very high environmental requirements. Lithium-ion batteries have the advantages of extremely low self-discharge rate and flat discharge voltage. With the development of science and technology, lithium-ion batteries have been widely used in notebook computers, tablet computers, mobile phones, aircraft models, medical equipment, power tool...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/587H01M4/133H01M4/1393H01M4/62H01M10/0525H01M10/42
CPCH01M4/133H01M4/1393H01M4/364H01M4/587H01M4/625H01M10/0525H01M10/4235Y02E60/10
Inventor 吴爱深罗新耀赵敏杨月坤
Owner 佛山市实达科技有限公司
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