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Process method for improving salt mist resistance of electroplated steel shell lithium battery

A process method, lithium battery technology, applied to battery pack parts, circuits, electrical components, etc., can solve problems such as low performance level, human poisoning, and inability to protect the surface of lithium battery with electroplated steel case, and achieve low cost , Salt spray resistance time increase, the effect of eliminating the use of chemical substances

Pending Publication Date: 2022-02-25
陕西蓝湾进平新能源有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0003] Sodium nitrite solution (0.2g sodium nitrite mixed with 50 liters of water) is used for surface cleaning after the existing lithium-ion battery is sealed. The sodium nitrite currently used is toxic, and excess will poison the human body and pollute the environment. , and sodium nitrite will gradually oxidize when exposed to the air, and the surface will become sodium nitrate, which will lose its original characteristics and cannot protect the surface of the electroplated steel case lithium battery, reducing the service life of the product
[0004] For lithium batteries, it must also be able to adapt to different application environments. Lithium battery corrosion resistance salt spray test is an important indicator, but the performance level of lithium battery corrosion resistance salt spray test is currently low, so it is very important to solve the above problems necessary

Method used

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  • Process method for improving salt mist resistance of electroplated steel shell lithium battery

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Experimental program
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Effect test

Embodiment

[0025] Clean with water-based rust inhibitor solution (sample 2)

[0026] 1. Take 5pcs of batteries after sealing and number them 2#-1, 2#-2, 2#-3, 2#-4, 2#-5, measure the product size to meet the process requirements, put the batteries into the assembly line washing machine;

[0027] 2. Inject 50 liters of water into the washing machine, add 100g of water-based rust inhibitor to fully dissolve it, and keep the water temperature at 23±2°C;

[0028] 3. Turn on the cleaning machine to work, spray the battery with sodium nitrite solution at a constant speed for about 20s, then use 0.2Mpa air pressure to dry the surface moisture, and finally enter the oven to bake the residual moisture on the surface, set the temperature to 100°C, and complete After the battery flows out of the washing machine, the whole process takes 80S.

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Abstract

The invention relates to a process method for improving salt mist resistance of an electroplated steel shell lithium battery. A compact protective film is added on the surface of the steel shell by replacing a cleaning solvent, so that the salt spray corrosion resistance grade of the lithium battery is improved. According to the technical scheme adopted by the invention, the method comprises the following steps of 1) completing production and sealing of the cylindrical lithium battery, confirming whether the product size meets the process requirement, and feeding qualified products into a cleaning machine, 2) preparing a water-based antirust agent solution with the concentration of 2%, setting the temperature of the solution to be 25 + / -2 DEG C, and cleaning for 20 + / -5 S, 3) after cleaning is completed, blow-drying by using the air pressure of 0.2 Mpa, and 4) baking residual water on the surface by using an oven.

Description

Technical field: [0001] The invention relates to a process method for improving the resistance to salt spray of an electroplated steel shell lithium battery. Background technique: [0002] As environmental pollution becomes more and more serious, high-capacity lithium-ion batteries will become the direction of future energy development. [0003] Sodium nitrite solution (0.2g sodium nitrite mixed with 50 liters of water) is used for surface cleaning after the existing lithium-ion battery is sealed. The sodium nitrite currently used is toxic, and excess will poison the human body and pollute the environment. , and sodium nitrite will gradually oxidize when exposed to the air, and the surface will become sodium nitrate, which will lose its original characteristics and cannot protect the surface of the electroplated steel case lithium battery, reducing the service life of the product. [0004] For lithium batteries, it must also be able to adapt to different application environ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/119
CPCH01M50/119Y02E60/10
Inventor 张永博
Owner 陕西蓝湾进平新能源有限公司
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