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Surface treated stainless steel band for buckle type lithium-ion battery shell and preparation process thereof

A lithium-ion battery and stainless steel belt technology, applied in battery pack parts, circuits, electrical components, etc., can solve the problems of poor electrical conductivity, welding performance, scratch resistance, and high production costs, reduce coating peeling, improve The effect of corrosion resistance

Active Publication Date: 2010-09-08
HUNAN YONGSHENG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are many problems in the existing stainless steel strips used for button-type lithium-ion battery casings: as mentioned in Chinese patent CN201289867Y, the existing button-type lithium-ion battery casings are usually stamped from 430 stainless steel strips or 304 stainless steel strips , the shell material stamped with 430 stainless steel strip has poor conductivity, welding performance and scratch resistance; the shell material stamped with 304 stainless steel strip has the disadvantage of high production cost in addition to the above shortcomings place

Method used

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  • Surface treated stainless steel band for buckle type lithium-ion battery shell and preparation process thereof
  • Surface treated stainless steel band for buckle type lithium-ion battery shell and preparation process thereof

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Embodiment 1

[0069] A 430 stainless steel strip with a thickness of 0.25 mm is selected as the plating substrate.

[0070] 1. Surface pretreatment before plating

[0071] Chemical degreasing and derusting of the base steel strip.

[0072] Degreasing liquid: 70g / L NaOH

[0073] 40g / L Na 2 CO 3

[0074] 25g / L Na 3 PO 4

[0075] 10g / L Na 2 SiO 3

[0076] Degreasing liquid temperature: 80℃

[0077] Degreasing time: 4min

[0078] After degreasing is complete, it is activated in an activator.

[0079] The activator is: H 2 SO 4 (d=1.84): 100ml / L

[0080] Activation temperature: room temperature

[0081] Electrolysis activation current density: 0.4A / dm 2

[0082] Activation time: 3min

[0083] 2. DC electroplating process of micron crystal nickel

[0084] Plating solution: NiSO 4 ·7H 2 O 280g / L

[0085] NiCl 2 ·6H 2 O 40g / L

[0086] H 3 BO 3 40g / L

[0087] DC electroplating process parameters: current density: 5A / dm 2

[0088] pH value: 4

[0089] ...

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Abstract

The invention discloses a surface treated stainless steel band for buckle type lithium-ion battery shell and a preparation process thereof, applicable to the buckle type lithium-ion battery shell material. The invention adopts a 430 stainless steel band as a substrate, three layers of Ni multilayer film with different grain sizes are electroplated on one surface of the stainless steel substrate so as to optimize the performances of the plating, thereby obtaining a buckle type lithium-ion battery shell material with excellent corrosion resistance, stamping performance and electrical conductivity. The invention also provides a preparation process of the material, which comprises the following steps: degreasing and activating the 430 stainless steel band, electroplating a micron-crystalline nickel coating on one surface of the 430 stainless steel band through DC electroplating, electroplating a nano-crystalline nickel coating through pulse electroplating, then electroplating a nano-crystalline nickel coating through pulse injection, washing with distilled water, drying and finally dehydrogenating.

Description

Technical field [0001] The invention relates to a surface-treated stainless steel belt for a button type lithium ion battery shell and a preparation process thereof, and belongs to the field of button type lithium ion batteries. Background technique [0002] With the development of science and technology and the optimized design of electrical appliances, there are more and more pocket-sized and portable electrical appliances. Therefore, the requirements for matching batteries are getting higher and higher. Button-type lithium-ion batteries have gained more and more advantages due to their small size, large capacity, and pollution-free advantages. More and more widely used. [0003] In order to improve battery performance, the current research on button lithium-ion batteries mainly focuses on the three aspects of positive electrode material, negative electrode material and electrolyte. However, there is little to improve the performance of button lithium-ion battery by improving the...

Claims

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Application Information

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IPC IPC(8): C25D5/14C25D5/08C25D5/18C25D5/26C25D5/36C25D5/48H01M2/02H01M50/109H01M50/119H01M50/126
CPCY02E60/12Y02E60/10
Inventor 潘俊安向奎潘勇刘小铷
Owner HUNAN YONGSHENG NEW MATERIALS
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