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Alloy powder surface processing method for power battery

A surface treatment, alloy powder technology, applied in the direction of alkaline battery electrodes, etc., to achieve the effect of improving the life of the alloy, improving the activation performance, and increasing the effective surface area

Inactive Publication Date: 2015-08-19
FUJIAN WEIDONG NEW ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the cycle life of hydrogen storage alloys treated by this method has been improved, it still needs to be further improved to meet the requirements of modern industrial production

Method used

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  • Alloy powder surface processing method for power battery
  • Alloy powder surface processing method for power battery
  • Alloy powder surface processing method for power battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Take the above alloy powder without surface treatment, and directly use it in the production of 6Ah nickel-hydrogen power battery, and then measure its performance.

Embodiment 2

[0037] Accurately weigh 1000g of the above alloy powder for use.

[0038] Add 1L of 7mol / L of sodium hydroxide: lithium hydroxide: potassium hydroxide = 0.70:0.25:0.05 into the vacuum stirred steel drum, and then add 2.65g of mixed lye treatment solution. Agent (one of sodium borohydride, potassium borohydride or sodium hypophosphite), and finally add 1000g of alloy powder for use. The alloy powder surface treatment is carried out in the above manner.

[0039] The alloy powder after the above treatment was used to make a nickel-hydrogen power battery with a capacity of 6Ah, and its performance was measured.

Embodiment 3

[0041] Accurately weigh 800g of the above alloy powder for use.

[0042] Add 0.8L of 10mol / L of sodium hydroxide: lithium hydroxide: potassium hydroxide = 0.70:0.25:0.05 into the vacuum stirred steel drum, and then add 2.12g of mixed lye treatment solution. Reducing agent (one of sodium borohydride, potassium borohydride, or sodium hypophosphite), and finally add 800g of alloy powder for use. The alloy powder surface treatment is carried out in the above manner.

[0043] According to the alloy powder after the above treatment, a nickel-hydrogen power battery with a capacity of 6Ah is made, and its performance is measured, such as Figure 1 to Figure 5 .

[0044] by Figure 1-4 It can be seen that the battery made of the alloy powder treated by the method of the present invention and the battery made of the untreated alloy powder fully show their superiority in both high-rate charge-discharge performance and lifespan comparison.

[0045] Figure 5 It can be seen that the comparison c...

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Abstract

The invention discloses an alloyed powder surface processing method for a power battery. The method comprises the steps as follows: a first step of processing large granular alloy blocks into alloy powder with a needed grain diameter for surface processing; a second step of contacting the alloy powder for surface processing, which is obtained in the first step, with an alkali treatment solution mixed with a reducing agent, performing high-temperature treatment on the obtained mixture, and washing the heated product until the pH value of washing liquor is about 7. The alloy powder surface processing method for the power battery of the invention overcomes the defects in high-rate discharge performance and cycle life of NI-MH power batteries in the prior art. The alloy powder surface processing method for the power battery of the invention is simple, comprehensive and effective in treatment process, and improves high-rate discharge performance and cycle life performance of the NI-MH power batteries.

Description

Technical field [0001] The invention relates to a surface treatment method of alloy powder, in particular to a surface treatment method of alloy powder for power battery electrodes. Background technique [0002] Ni-MH battery is a new type of battery developed on the basis of hydrogen storage alloy technology and cadmium-nickel battery technology in recent years. As a new type of energy carrier, it has become a research hotspot in the battery industry and represents the development direction of alkaline batteries. Ni-MH batteries are called green batteries because they have the advantages of specific energy, high specific power, high rate charging and discharging performance, wide temperature application range, safe use, no memory effect, and no pollution to the environment. In today's energy shortage and environmental pollution, nickel-hydrogen batteries show broad application prospects. [0003] The negative electrode active material of nickel-hydrogen battery is hydrogen storag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/26
CPCH01M4/26Y02E60/10
Inventor 苏耿彭军文刘开宇卞永岩刘又年纪效波郑礼华
Owner FUJIAN WEIDONG NEW ENERGY
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