Production method for positive pole of high-power nickel-metal hydride battery

A nickel-metal hydride battery and the technology of its manufacturing method, which are applied in the direction of alkaline storage battery electrodes, etc., can solve problems such as high impedance, affecting battery discharge performance, and large internal resistance of the battery, so as to reduce contact resistance, improve high-power discharge performance, and improve combination force effect

Inactive Publication Date: 2012-11-14
QUANZHOU JINTION ELECTRONICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a method for making the positive electrode of a high-power nickel-metal hydride battery, the main purpose of which is to overcome the shortcomings of the existing nickel-hydrogen battery positive plate itself, which has a high impedance, resulting in a large internal resistance of the battery, thereby affecting the discharge performance of the battery

Method used

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Examples

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Comparison scheme
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Embodiment 1

[0018] A method for making a high-power nickel-metal hydride battery positive electrode, comprising the following steps:

[0019] 1) Preparation of active material: Mix nickel hydroxide and cobalt hydroxide, add a small amount of yttrium oxide as an additive, and then use mechanical stirring to mix thoroughly to form a mixed powder. The mixed powder includes: 90 parts of nickel hydroxide, 5 parts of cobalt hydroxide, 3 parts of yttrium oxide.

[0020] 2) Mixed filling: Add aluminum powder to the mixed powder, and then use ultrasonic vibration to fully mix to form a powder. The particle size of the aluminum powder is controlled at 20-100 microns. The powder includes: 100 parts of mixed powder, aluminum Powder 3 parts.

[0021] 3) Contacting the substrate: The powder is filled onto the substrate by physical filling, and after filling, it is rolled by a roller machine so that the powder can fully contact the substrate to form a positive electrode sheet.

[0022] 4) Subsequent p...

Embodiment 2

[0027] A method for making a high-power nickel-metal hydride battery positive electrode, comprising the following steps:

[0028] 1) Preparation of the active material: Mix nickel hydroxide and cobalt hydroxide, add a small amount of yttrium oxide as an additive, and then use ultrasonic vibration to fully mix to form a mixed powder. The mixed powder includes: nickel hydroxide 85 1 part, 2 parts of cobalt hydroxide, and 0.1 part of yttrium oxide.

[0029] 2) Mixed filler: Add aluminum powder to the mixed powder, and then use mechanical stirring to fully stir and mix to form a powder. The particle size of the aluminum powder is controlled at 20-100 microns. The powder includes by weight: 95 parts of mixed powder, aluminum Powder 0.5 part.

[0030] 3) Contacting the substrate: The powder is filled onto the substrate by physical filling, and after filling, it is rolled by a roller machine so that the powder can fully contact the substrate to form a positive electrode sheet.

[0...

Embodiment 3

[0033] A method for making a high-power nickel-metal hydride battery positive electrode, comprising the following steps:

[0034] 1) Preparation of active material: Mix nickel hydroxide and cobalt hydroxide, add a small amount of yttrium oxide as an additive, and then use mechanical stirring to mix thoroughly to make a mixed powder. The mixed powder includes: nickel hydroxide 95 parts, 10 parts of cobalt hydroxide, 5 parts of yttrium oxide.

[0035] 2) Mixed filling: Add aluminum powder to the mixed powder, and then use ultrasonic vibration to fully mix to form a powder. The particle size of the aluminum powder is controlled at 100 microns. The powder includes by weight: 101 parts of mixed powder, 6 parts of aluminum powder share.

[0036] 3) Contacting the substrate: The powder is filled onto the substrate by physical filling, and after filling, it is rolled by a roller machine so that the powder can fully contact the substrate to form a positive electrode sheet.

[0037] 4...

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PUM

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Abstract

The invention discloses a production method for the positive pole of a high-power nickel-metal hydride battery, comprising the following steps of: step 1, mixing nickel hydroxide with cobalt hydroxide, adding a small amount of yttrium oxide as an additive, and then adequately stirring and mixing to prepare a mixed powder; step 2, adding an aluminium powder in the mixed powder, and then adequately stirring and mixing to prepare a powder, wherein the particle size of the aluminium powder is controlled to be 20-100 microns; step 3, filling the powder on a matrix by means of physical filling, and rolling via a rolling machine so that the powder can be adequately contacted with the matrix to form a positive pole piece; and step 4, conveying the positive pole piece in a high-temperature tunnel kiln and performing a high-temperature treatment, and rolling again via the rolling machine, wherein the temperature in the high-temperature tunnel kiln is controlled to 150-300 DEG C. The aluminium powder is used as the filler, so that the high-power discharge performance of the nickel-metal hydride battery is improved.

Description

technical field [0001] The invention relates to a production process of a nickel-hydrogen battery, in particular to a method for making a positive electrode of a high-power nickel-hydrogen battery. Background technique [0002] With people's emphasis on environmental protection, the traditional automobile industry is seeking a new way out, and the environmentally friendly and low-carbon electric vehicles have naturally become the key research and development objects of various companies, thus bringing new development space to the battery industry. At present, there are three main types of batteries for electric vehicles: lead-acid batteries, nickel-metal hydride batteries, and lithium batteries. Lead-acid batteries have been abandoned by most manufacturers due to their destructiveness to the environment and their low energy quality, while lithium-ion batteries have made most manufacturers timid because of their own safety, even if they invest a lot Funds are used for develo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/30
CPCY02E60/124Y02E60/10
Inventor 陈文明陈端典李培坤张桂生
Owner QUANZHOU JINTION ELECTRONICS
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