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Electroplating solution and method of using electroplating solution to electroplate shell of battery

A technology of electroplating solution and casing, which is applied in the field of electroplating solution and the electroplating of the casing of the battery, which can solve the problems of affecting the high-current discharge performance of the battery storage battery, affecting the performance of the battery, and increasing the resistance, so as to achieve production and maintenance. Simple, less decomposition products, good flexibility and ductility

Active Publication Date: 2019-11-22
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 of using electroplating solution to electroplate shell of battery
  • Electroplating solution and method of using electroplating solution to electroplate shell of battery
  • Electroplating solution and method of using electroplating solution to electroplate shell of battery

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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 of using the electroplating solution to electroplate a shell of a battery. The electroplating solution comprises nickel sulfate and / or hydrate thereof, nickel chloride or hydrate thereof, cobalt sulfate and / or hydrate thereof, an acidic buffer agent, 1-3g / L of saccharin and / or a salt thereof, 0.5-1g / L of a compound containing alkyne amido, 0.1-0.5g / L of sulfonic acid containing unsaturated hydrocarbon and / or a salt thereof, and 0.1-0.5g / L of carboxyethyl isothiourea hydrazine and water; working substrate and additives are dissolvedinto water, and amount of water can be enough for preparing 1L of the electroplating solution which does not comprise a wetting agent. The electroplating solution provided by the invention has betterdeep hole film-coating ability, and is suitable for electroplating the formed battery shell. The electroplating solution is used, so that a nickel-cobalt alloy coating with cobalt content being 30%-50%wt and a thickness not lower than 0.5 [mu] can be obtained in the battery shell.

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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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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