High-temperature nickel-metal hydride battery and manufacturing method thereof

A nickel-metal hydride battery, high-temperature technology, applied in the direction of nickel storage battery, alkaline storage battery manufacturing, alkaline storage battery, etc., can solve the problems of high battery cost, low battery specific capacity, etc., to avoid the use of rare earth elements, improve high temperature performance, The effect of high temperature charge and discharge capacity improvement

Inactive Publication Date: 2012-06-13
QUANZHOU JINTION ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a high-temperature nickel-metal hydride battery and a manufacturing method thereof, the pu

Method used

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Examples

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Comparison scheme
Effect test

Embodiment 1

[0022] A high-temperature nickel-metal hydride battery, which is mainly composed of a positive electrode, a negative electrode, a battery diaphragm and an electrolyte. The positive electrode includes a matrix made of nickel foam, an active material nickel hydroxide, a conductive agent cobalt powder, cobalt oxide and an additive sodium tungstate. The weight ratio includes about 1% of cobalt powder, 5% of cobalt oxide and 0.5% of sodium tungstate; the battery separator adopts grafted polypropylene separator; the above electrolyte is sodium hydroxide solution with a concentration of 6.5mol / L.

[0023] The manufacturing method of above-mentioned high-temperature nickel-metal hydride battery is as follows:

[0024] The first step: use nickel foam as the matrix, add nickel hydroxide as the active material, then add cobalt oxide with a weight ratio of 5% and additive sodium tungstate with a weight ratio of 0.5%, and then add 1% cobalt powder as a weight ratio Conductive agent, made o...

Embodiment 2

[0031] This embodiment is a preferred embodiment, a high-temperature nickel-metal hydride battery, which is mainly composed of a positive electrode, a negative electrode, a battery separator, and an electrolyte. Cobalt and additives sodium tungstate, potassium tungstate and calcium tungstate, in which nickel powder accounts for about 1%, cobalt oxide accounts for 5%, and the sum of sodium tungstate, potassium tungstate and calcium tungstate accounts for 1% by weight; battery The diaphragm adopts a grafted polypropylene diaphragm; the above electrolyte is a mixed solution of sodium hydroxide and potassium hydroxide with a concentration of 8mol / L.

[0032] The manufacturing method of above-mentioned high-temperature nickel-metal hydride battery is as follows:

[0033] The first step: use nickel foam as the matrix, add nickel hydroxide as the active material, then add cobalt oxide with a weight ratio of 5% and additives with a weight ratio of 1% (sodium tungstate, potassium tungs...

Embodiment 3

[0040] A high-temperature nickel-metal hydride battery, which is mainly composed of a positive electrode, a negative electrode, a battery separator and an electrolyte. The positive electrode includes a matrix made of nickel foam, an active material nickel hydroxide, a conductive agent cobalt powder, cobalt oxide, and additives sodium tungstate, tungsten Potassium tungstate and calcium tungstate, in which nickel powder accounts for about 1%, cobalt oxide accounts for 5%, and the sum of sodium tungstate, potassium tungstate and calcium tungstate accounts for 5% by weight; the battery separator is made of grafted polypropylene Diaphragm; the above electrolyte is a mixed solution of sodium hydroxide and potassium hydroxide with a concentration of 10mol / L.

[0041] The manufacturing method of above-mentioned high-temperature nickel-metal hydride battery is as follows:

[0042] The first step: use nickel foam as the matrix, add nickel hydroxide as the active material, then add cobal...

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Abstract

The invention discloses a high-temperature nickel-metal hydride battery. The high-temperature nickel-metal hydride battery comprises an anode, a cathode, a battery diaphragm and one or more electrolytes. The anode comprises a matrix, an active substance, a conductive agent, cobalt oxide and one or more additives. The one or more additives are selected from sodium tungstate, potassium tungstate and calcium tungstate. The weight of the one or more additives is 0.5 to 5% of the total weight of the anode. The battery diaphragm is a polypropylene diaphragm which is subjected to grafting or fluorination treatment. The one or more electrolytes are selected from sodium hydroxide, lithium hydroxide and potassium hydroxide. The concentration of the one or more electrolytes is in a range of 6.5 to 10mol/L. The high-temperature nickel-metal hydride battery has the advantage that the one or more additives are selected from sodium tungstate, potassium tungstate and calcium tungstate so that nickel-metal hydride battery high-temperature performances are improved effectively; rare-earth element utilization is avoided; and a production cost is greatly reduced. The invention also discloses a manufacturing method of the high-temperature nickel-metal hydride battery. The manufacturing method of the high-temperature nickel-metal hydride battery has simple processes.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a high-temperature nickel-hydrogen battery capable of maintaining relatively high charging efficiency under high-temperature conditions and a manufacturing method thereof. Background technique [0002] In recent years, due to the enhancement of people's awareness of environmental protection, the serious air pollution caused by automobile exhaust to the urban environment has been highly valued by the governments of various countries. The use of electric vehicles (EV, HEV) is considered to be an effective way to solve this problem. Compared with traditional nickel-cadmium batteries, nickel-metal hydride batteries have superior performances such as high energy density and high power density, no pollution, long life and good safety, and are regarded as the research and development focus of EV and HEV power batteries. However, due to the narrow operating temperature range of Ni-MH b...

Claims

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Application Information

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IPC IPC(8): H01M10/30H01M10/26H01M2/16H01M10/28
CPCY02E60/124Y02E60/10Y02P70/50
Inventor 陈端典陈文明李培坤张桂生尹纯
Owner QUANZHOU JINTION ELECTRONICS
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