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Anti-corrosion electrode shell of steel shell button cell, preparation method of anti-corrosion electrode shell, steel shell button cell and application of steel shell button cell

A button battery and anti-corrosion technology, which is applied to battery components, circuits, electrical components, etc., can solve the problems of blackening of the positive and negative steel shells, low potential of the negative steel shells, and corrosion of the positive and negative shells. The effect of preventing corrosion, improving K value, and reducing internal resistance

Inactive Publication Date: 2021-04-27
EVE HYPERPOWER BATTERIES INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] At present, the steel shell button battery basically adopts the positive and negative steel shells, both of which are conventional 304 stainless steel shells. However, due to the high potential of the positive end of this steel shell and the low potential of the negative steel shell, it is easy to cause high temperature cycle and high temperature. Corrosion occurs inside the positive and negative electrode shells during high humidity storage, and the steel shells of the positive and negative electrodes turn black and yellow, resulting in a decrease in battery performance and an increase in defective rate

Method used

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  • Anti-corrosion electrode shell of steel shell button cell, preparation method of anti-corrosion electrode shell, steel shell button cell and application of steel shell button cell
  • Anti-corrosion electrode shell of steel shell button cell, preparation method of anti-corrosion electrode shell, steel shell button cell and application of steel shell button cell
  • Anti-corrosion electrode shell of steel shell button cell, preparation method of anti-corrosion electrode shell, steel shell button cell and application of steel shell button cell

Examples

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Effect test

Embodiment 1

[0051] This embodiment provides an anti-corrosion electrode case of a steel case button battery, the anti-corrosion electrode case includes a stainless steel substrate (304 steel) and a 70 μm thick nickel coating coated on the inner surface of the stainless steel substrate.

[0052] This embodiment also provides a preparation method for the anti-corrosion electrode case of the steel case button battery, the preparation method comprising:

[0053] The stainless steel substrate is clamped in the splint, only the inner surface of the stainless steel substrate is exposed, and a nickel layer is formed on the inner surface of the stainless steel substrate by electroplating. The electroplating solution used for electroplating to form the nickel layer includes nickel sulfate, magnesium sulfate, and sulfuric acid. Sodium, boric acid and sodium chloride, and the pH value of the electroplating solution is 5.6, and the current density in the electroplating process is 1.5A / dm 2 , Electropl...

Embodiment 2

[0055] This embodiment provides an anti-corrosion electrode case of a steel case button battery, the anti-corrosion electrode case includes a stainless steel base (304 steel) and a 63 μm thick aluminum coating coated on the inner surface of the stainless steel base.

[0056] This embodiment also provides a preparation method for the anti-corrosion electrode case of the steel case button battery, the preparation method comprising:

[0057] The stainless steel substrate is clamped in the splint, only the inner surface of the stainless steel substrate is exposed, and an aluminum coating is formed on the inner surface of the stainless steel substrate by electroplating. The electroplating solution used for electroplating to form the aluminum coating includes 65% molar content of After mixing urea and aluminum chloride with a content of 40%, heat at 65°C for 3h, then add the same volume of amide, stir and filter the composition, and the pH value of the electroplating solution is 7.5,...

Embodiment 3

[0059] This embodiment provides an anti-corrosion electrode case of a steel case button battery, the anti-corrosion electrode case includes a stainless steel substrate (304 steel) and a 150 μm thick zinc coating coated on the inner surface of the stainless steel substrate.

[0060] This embodiment also provides a preparation method for the anti-corrosion electrode case of the steel case button battery, the preparation method comprising:

[0061] The stainless steel substrate is clamped in the splint, only the inner surface of the stainless steel substrate is exposed, and a silicon carbide coating is formed on the inner surface of the stainless steel substrate by electroplating. The electroplating solution used for electroplating to form the zinc coating includes a sulfuric acid solution containing zinc 65g / L, potassium 200g / L, boric acid 35g / L, and the pH value of the electroplating solution is 5.2, and the current density in the electroplating process is 1-4A / dm 2 , Electropl...

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Abstract

The invention provides an anti-corrosion electrode shell of a steel shell button cell, which comprises a stainless steel substrate and a coating which is coated on the inner surface of the stainless steel substrate and has the thickness of at least 10 mu m, the coating can prevent corrosion of the positive electrode shell due to high potential and corrosion of the negative electrode under low potential in high-temperature circulation and high-temperature and high-humidity storage processes, effectively alleviates the problems of blackening and yellowing of the positive electrode shell of the steel shell button cell, can also improve the K value, yield and appearance of the cell, does not need to change the existing process, and is suitable for large-scale production; only the coating design needs to be added, the cost increase is relatively low, and the application prospect is wide.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to an anti-corrosion electrode shell of a steel shell button battery, a preparation method and application thereof. Background technique [0002] TWS (True Wireless Stereo) headset is a relatively advanced wireless headset. The implementation of TWS technology is based on the development of chip technology. With the help of Bluetooth chip, it first establishes a wireless connection between the mobile phone and the main headset, and then establishes the main headset. The wireless communication with the pair of earphones completely abandons the wire connection between the traditional earphones, which greatly facilitates the use of users. [0003] Most of the TWS Bluetooth headsets use round steel shell button batteries, which are mainly due to its good safety, good cycle process and high and low temperature storage performance, almost no expansion during cycle process, and light and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/109H01M50/119H01M50/124H01M50/145H04R1/10
CPCH04R1/10Y02E60/10
Inventor 王德怀吕鑫刘荣江黄彬彬刘金成刘建华
Owner EVE HYPERPOWER BATTERIES INC
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