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Anodic oxidation solution, battery shell, insulation protection method of battery shell and application of anodic oxidation solution

A battery casing and insulation protection technology, applied in secondary batteries, battery pack components, circuits, etc., can solve the problems of limited insulation performance and corrosion resistance of battery casings, reduce the risk of short circuit, high composite hardness, and insulation. high effect

Pending Publication Date: 2022-01-07
SVOLT ENERGY TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects of the limited insulation performance and corrosion resistance of the battery case in the prior art, and then provide an anodic oxidation solution, a battery case and its insulation protection method and application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] This embodiment provides a method for insulating and protecting the aluminum shell of a square battery, including the following steps:

[0045] 1) Mechanical polishing: Mechanically polish the inner and outer surfaces of the stamped square battery aluminum casing with polishing powder to remove scratches and reduce the surface roughness of the aluminum casing;

[0046] 2) Degreasing treatment: Put the polished aluminum shell into an ultrasonic cleaning machine equipped with degreasing liquid for ultrasonic cleaning to wash away the oil stains contaminated during the mechanical polishing process. The ultrasonic frequency is 40000 Hz, and the ultrasonic time is 60 minutes;

[0047] The degreasing liquid is composed of the following components in terms of mass fraction: 4wt% sodium carbonate, 4wt% sodium silicate, 5wt% glycerol monostearate, 1wt% sodium tripolyphosphate, 1wt% sodium benzoate, and 85wt% water;

[0048] 3) Anodizing: Rinse the degreased aluminum shell with cle...

Embodiment 2

[0052] This embodiment provides a method for insulating and protecting the aluminum shell of a cylindrical battery, which includes the following steps:

[0053] 1) Mechanical polishing: mechanically polish the inner and outer surfaces of the cylindrical battery aluminum casing formed by stamping with polishing powder to remove scratches and reduce the surface roughness of the aluminum casing;

[0054] 2) Degreasing treatment: Put the polished aluminum shell into an ultrasonic cleaning machine equipped with degreasing liquid for ultrasonic cleaning to wash away the oil stains contaminated during the mechanical polishing process. The ultrasonic frequency is 40000 Hz and the ultrasonic time is 50 minutes;

[0055] The degreasing liquid is composed of the following components in mass fraction: 5wt% sodium carbonate, 3wt% sodium silicate, 2wt% glyceryl monostearate, 3wt% sodium stearate, 1wt% sodium tripolyphosphate, sodium benzoate 1wt%, water 85wt%;

[0056] 3) Anodizing: Rinse ...

Embodiment 3

[0060] This embodiment provides a method for insulating and protecting the aluminum shell of a cylindrical battery, which includes the following steps:

[0061] 1) Mechanical polishing: mechanically polish the inner and outer surfaces of the cylindrical battery aluminum casing formed by stamping with polishing powder to remove scratches and reduce the surface roughness of the aluminum casing;

[0062] 2) Degreasing treatment: Put the polished aluminum shell into an ultrasonic cleaning machine equipped with degreasing liquid for ultrasonic cleaning to wash away the oil stains contaminated during the mechanical polishing process. The ultrasonic frequency is 30000 Hz, and the ultrasonic time is 80 minutes;

[0063] The degreasing liquid is composed of the following components in terms of mass fraction: 5wt% sodium silicate, 4wt% sodium stearate, 3wt% sodium tripolyphosphate, 3wt% sodium benzoate, and 85wt% water;

[0064] 3) Anodizing: Rinse the degreased aluminum shell with clea...

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Abstract

The invention belongs to the technical field of batteries and relates to an anodic oxidation solution, a battery shell, an insulation protection method of the battery shell and application of the anodic oxidation solution. The battery shell provided by the invention comprises a shell body and a protective layer arranged on the surface of the shell body, and the protective layer is made of a composite material formed by aluminum oxide and polyaniline. According to the battery shell provided by the invention, the insulating property and the corrosion resistance of the battery shell can be greatly improved.

Description

technical field [0001] The invention relates to the field of battery technology, in particular to an anodic oxidation solution, a battery case, and an insulation protection method and application thereof. Background technique [0002] Lithium-ion batteries have the advantages of high energy density, good safety performance, long cycle life, and safety and environmental protection. They are widely used, such as consumer electronics, energy storage, and new energy vehicles. Lithium-ion batteries used in new energy vehicles are called power Battery. Generally, power batteries can be divided into cylindrical batteries, pouch batteries and square batteries according to their packaging forms. Square batteries have the highest market share due to their high packaging reliability, stable structure, high energy efficiency, and simple grouping. [0003] The shell of the battery is generally made of aluminum. Because it is made of metal, the surface of the shell is usually covered wit...

Claims

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Application Information

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IPC IPC(8): H01M50/145H01M50/122H01M10/0525
CPCH01M50/122H01M10/0525H01M50/145Y02E60/10
Inventor 刘鑫王礼军高飞郭明奎
Owner SVOLT ENERGY TECHNOLOGY CO LTD
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