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A fast-chargeable lithium-ion battery positive plate

A lithium-ion battery and fast charging technology, which is applied to battery electrodes, secondary batteries, circuits, etc., can solve the problems of unfavorable normal use of equipment and restrictions on the use of lithium-ion batteries, and achieve good high-rate charging performance without affecting cycle charging. Discharge life and the effect of reducing internal resistance

Active Publication Date: 2021-08-24
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 positive plate
  • A fast-chargeable lithium-ion battery positive plate
  • A fast-chargeable lithium-ion battery positive plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1 A kind of rapidly chargeable lithium-ion battery positive plate

[0024] The raw material formula of the positive electrode sheet is composed of the following raw materials in parts by weight: 93.5 parts of positive electrode active material, 7 parts of conductive agent, and 4.8 parts of binder;

[0025] The positive electrode active material is composed of LiCoO2 and NCM at a mass ratio of 1: 1.2, and the particle diameter D50 of the positive electrode active material is 6.0 μm; the conductive agent is composed of carbon nanotubes and conductive carbon black, wherein the carbon nanotubes The mass accounts for 75% of the conductive agent, and the binder is PVDF.

[0026] The preparation method of the positive electrode sheet of the battery, the specific operation steps are as follows:

[0027] (1) Pretreatment of the positive electrode active material: first add distilled water to completely soak the positive electrode active material with a particle size ...

Embodiment 2

[0029] Example 2 A fast-chargeable lithium-ion battery positive plate

[0030] The difference between Example 2 and Example 1 is that the positive electrode raw material formula is composed of the following raw materials in parts by weight: 90 parts of positive electrode active material, 5 parts of conductive agent, and 3 parts of binder; the remaining methods and steps are the same as in Example 1;

[0031] The positive electrode active material is LiCoO2 and NCM by mass ratio 1: 1.2 composition, the particle diameter D50 of positive electrode active material is 6 μ m; The described conductive agent is made up of carbon nanotubes, conductive carbon black, wherein the carbon nanotubes The mass accounts for 75% of the conductive agent, and the binder is PVDF.

Embodiment 3

[0032] Example 3 A fast-chargeable lithium-ion battery positive electrode sheet

[0033] The difference between Example 3 and Example 1 is that the positive electrode raw material formula is composed of the following raw materials in parts by weight: 99 parts, 9 parts of conductive agent, and 6 parts of binder; the rest of the methods and steps are the same as in Example 1;

[0034] The positive electrode active material is LiCoO2 and NCM by mass ratio 1: 1.2 composition, the particle diameter D50 of positive electrode active material is 6 μ m; The described conductive agent is made up of carbon nanotubes, conductive carbon black, wherein the carbon nanotubes The mass accounts for 75% of the conductive agent, and the binder is PVDF.

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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 positive electrode sheet. The battery positive electrode sheet contains the following raw materials in parts by weight: 90-99 parts of positive electrode active material, 5-9 parts of conductive agent , 3 to 6 parts of binder; the lithium-ion battery positive sheet that can be charged quickly according to the present invention uses nano-state aluminum-zirconium composite oxide to carry out special treatment on the positive electrode active material, and the positive electrode The formula has been scientifically and rationally designed; the prepared battery positive plate is used in lithium batteries, and has excellent performances such as low temperature rise during charging, short charging time, and long cycle charge and discharge life.

Description

technical field [0001] The invention relates to the technical field of lithium-ion batteries, in particular to a fast-chargeable lithium-ion battery positive electrode sheet. Background technique [0002] Lithium batteries were first used in cardiac pacemakers. The self-discharge rate of lithium batteries is extremely low, and the discharge voltage is flat, so that the pacemaker implanted in the human body can operate for a long time without recharging. Lithium batteries generally have a value higher than 3.0. The nominal voltage of volts is more suitable as an integrated circuit power supply, and manganese dioxide batteries are widely used in calculators, digital cameras, and watches. In order to develop varieties with better performance, people have studied various materials, so that Create unprecedented products. In 1992, Sony successfully developed lithium-ion batteries. Its practical application has greatly reduced the weight and volume of portable electronic devices su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/131H01M4/1391H01M4/36H01M4/505H01M4/525H01M4/62H01M10/0525B82Y30/00
CPCB82Y30/00H01M4/131H01M4/1391H01M4/362H01M4/505H01M4/525H01M4/628H01M10/0525Y02E60/10
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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