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Electroplating solution and method for electroplating battery case using same

A technology of electroplating solution and shell is applied in the field of electroplating solution and the shell electroplating of batteries using the same, which can solve the problems of affecting the high-current discharge performance of battery storage batteries, affecting battery performance, increasing resistance, etc., and achieving production maintenance. Simple, improved battery performance, less decomposition products

Active Publication Date: 2021-06-15
FUJIAN NANPING NANFU BATTERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the plate has been coated with a coating, part of the coating will be damaged due to stretching during the stamping process, which will increase the resistance of the accessories in the battery during battery storage, for example, the contact resistance between the shell and the coating will increase Large, thus affecting the performance of the battery, specifically, affecting the storage of the battery and the high-current discharge performance of the battery in the later stage of battery storage

Method used

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  • Electroplating solution and method for electroplating battery case using same
  • Electroplating solution and method for electroplating battery case using same
  • Electroplating solution and method for electroplating battery case using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] This embodiment provides a control group 1, and the components and process conditions in the control group 1 are shown in Table 1 below.

[0067] Table 1

[0068]

[0069] Using the electroplating solution provided by control group 1, normal barrel plating production, electroplating for 3.5-4 hours can obtain a nickel-cobalt alloy coating with a thickness of 0.03-0.1um on the top of the battery case. The thickness of the coating in the hole is not uniform, and the thickness of the coating is not enough. Meet the performance requirements of the battery.

Embodiment 2

[0071] This embodiment provides a control group 2, and the components and process conditions in the control group 2 are shown in Table 2 below.

[0072] Table 2

[0073]

[0074] Compared with the electroplating solution of the control group 1, the electroplating solution of the control group 2 has added a deep plating agent with an unsaturated aliphatic chain and a sulfonated group -SO2-. Using the electroplating solution provided by control group 2, normal barrel plating production, electroplating for 3.5-4 hours can obtain a nickel-cobalt alloy coating with a thickness of 0.1-0.2um on the top of the battery case. The thickness of the coating in the hole is not uniform, but it can meet the requirements of the battery. General performance requirements.

Embodiment 3

[0076] This embodiment provides an experimental group 1, and the components and process conditions in the experimental group 1 are shown in Table 3 below.

[0077] table 3

[0078]

[0079]

[0080] Compared with the electroplating solution of control group 1, the electroplating solution of experimental group 1 added two deep plating agents, one is a deep plating agent with unsaturated aliphatic chain and sulfonated group -SO2-, and the other It is carboxyethyl isothiouronium salt. The combination of these two deep-plating agents further improves the deep-hole coating ability of the electroplating solution. Using the electroplating solution provided by experimental group 1, normal barrel plating production, electroplating for 3.5 to 4 hours can obtain a nickel-cobalt alloy coating with good brightness outside the battery case, a coating thickness of not less than 0.5um in the case, and a cobalt content of 30% to 50%wt. The thickness of the inner plating of this alloy c...

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Abstract

The invention provides an electroplating solution and a method for using it to electroplate a casing of a battery. The electroplating solution includes nickel sulfate and / or its hydrate, nickel chloride and / or its hydrate, cobalt sulfate and / or its hydrate , acid buffer, saccharin and / or its salt 1~3g / L, compound containing alkyne amine group 0.5~1g / L, sulfonic acid containing unsaturated hydrocarbon group and / or its salt 0.1~0.5g / L, carboxyethyl 0.1-0.5 g / L of base isothiouronium salt and water; the working substrate and the additives are all soluble in water, the amount of water can make the electroplating solution of 1L, and the electroplating solution does not include a wetting agent. The electroplating solution provided by the invention can have better deep-hole coating ability, and is suitable for electroplating formed battery casings. By using the above electroplating solution, a nickel-cobalt alloy coating with a thickness of not less than 0.5um and a cobalt content of 30%-50%wt can be obtained in the battery case.

Description

technical field [0001] The invention relates to the technical field of electroplating, and more particularly relates to an electroplating solution and a method for electroplating a casing of a battery using the electroplating solution. Background technique [0002] In the production process of the battery steel case, usually the plate used to make the steel case, such as a steel strip, is immersed in the electroplating solution for rack plating, and then the coated plate is cut, stamped and bent into steel. shell. Since the plate has been coated with a coating, part of the coating will be damaged due to stretching during the stamping process, which will increase the resistance of the accessories in the battery during battery storage, for example, the contact resistance between the shell and the coating will increase Large, thereby affecting the performance of the battery, specifically, affecting the storage capacity of the battery and the high-current discharge performance ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D3/56C25D7/04
CPCC25D3/562C25D7/04
Inventor 常海涛王贵希薛祥峰
Owner FUJIAN NANPING NANFU BATTERY
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