Nickel-hydrogen battery used in extremely cold environment and preparation method of nickel-hydrogen battery

A technology for nickel-metal hydride batteries and extremely cold environments, which is applied in the manufacture of nickel batteries, alkaline batteries, and battery electrodes.

Inactive Publication Date: 2018-04-03
SHENZHEN EPT BATTERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially as an alternative environmentally friendly secondary energy source for nickel-cadmium batteries, it has attracted attention, but its performance at low temperature has not been superior to that of nickel-cadmium batteries.

Method used

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  • Nickel-hydrogen battery used in extremely cold environment and preparation method of nickel-hydrogen battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] S1. Take foamed nickel metal as the positive electrode substrate, and compact the edge area of ​​the positive electrode substrate to form a white edge with a width of 2 mm;

[0041] S2. After mixing the positive electrode active material evenly, fill it on the positive electrode substrate obtained in step S1, roll and cut it, and make the positive electrode sheet of the nickel-metal hydride battery;

[0042] S3. Take foamed metal copper as the negative electrode substrate, with 40% A2B7 hydrogen storage alloy powder, 56.2% AB5 hydrogen storage alloy powder, 3% T255 ultrafine metal nickel powder, 0.3% carbon nanotubes, 0.5% Yb2O3 forms an additive combination, and then fills the additive combination on the negative electrode substrate, and obtains the negative electrode sheet through drying and rolling.

[0043] S4. Prepare electrolyte and separator, the weight ratio of electrolyte is: KOH: LiOH: CsOH: glycerol: H2O=50:2:4:0.5:100;

[0044] S5. Assemble the positive pol...

Embodiment 2

[0046] S1. Take foamed nickel metal as the positive electrode substrate, and compact the edge area of ​​the positive electrode substrate to form a 2.2mm wide white edge;

[0047] S2. After mixing the positive electrode active material evenly, fill it on the positive electrode substrate obtained in step S1, roll and cut it, and make the positive electrode sheet of the nickel-metal hydride battery;

[0048] S3. Take the foamed metal copper as the negative electrode substrate, with 28% A2B7 hydrogen storage alloy powder, 50% AB5 hydrogen storage alloy powder, 1% T255 ultrafine metal nickel powder, 0.1% carbon nanotube, 0.3% Y2O3 forms an additive combination, and then fills the additive combination on the negative electrode substrate, and obtains the negative electrode sheet through drying and rolling.

[0049] S4. Prepare electrolyte and separator, the weight ratio of electrolyte is: KOH: LiOH: CsOH: glycerol: H2O=50:1:2:0.3:100;

[0050] S5. Assemble the positive pole piece, t...

Embodiment 3

[0052] S1. Take foamed nickel metal as the positive electrode substrate, and compact the edge area of ​​the positive electrode substrate to form a 2.5mm wide white edge;

[0053] S2. After mixing the positive electrode active material evenly, fill it on the positive electrode substrate obtained in step S1, roll and cut it, and make the positive electrode sheet of the nickel-metal hydride battery;

[0054]S3. Take the foamed metal copper as the negative electrode substrate, with 30% A2B7 hydrogen storage alloy powder, 51% AB5 hydrogen storage alloy powder, 1.2% T255 ultrafine metal nickel powder, 0.15% carbon nanotube, 0.35% Er2O3 forms an additive combination, and then fills the additive combination on the negative electrode substrate, and then obtains the negative electrode sheet through drying and rolling.

[0055] S4. Prepare electrolyte and separator, the weight ratio of electrolyte is: KOH: LiOH: CsOH: glycerol: H2O=50:1.2:2.5:0.4:100;

[0056] S5. Assemble the positive ...

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PUM

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Abstract

The invention provides a nickel-hydrogen battery used in an extremely cold environment. The nickel-hydrogen battery comprises a positive electrode substrate, a negative electrode substrate and an electrolyte. The negative electrode substrate has an additive assembly, which comprises, by weight, 28-50% of A2B7 hydrogen-storage alloy powder, 50-70% of AB5 hydrogen-storage alloy powder, 1-3% of T255ultrafine metal nickel powder, 0.1-0.5% of carbon nanotubes, and 0.3-0.5% of M2O3, which is one or more of Yb2O3, Y2O3, Er2O3, and Tm2O3. The invention further discloses a preparation method of a nickel-hydrogen battery used in an extremely cold environment. The nickel-hydrogen battery is sufficient in discharging capacity at an extremely low temperature, is stable, can be used for a long time, and can be widely used to equipment that works in an extremely cold environment.

Description

technical field [0001] The invention relates to the field of nickel-hydrogen batteries, in particular to a nickel-hydrogen battery that can be used in extremely cold environments and a manufacturing method thereof. Background technique [0002] A nickel metal hydride battery consists of a positive electrode, a negative electrode, a separator, and an electrolyte. The positive electrode is usually a nickel electrode, and the nickel electrode is made of foamed nickel as the substrate and electrochemically impregnated; the negative electrode is made of hydrogen storage alloy powder attached to the negative electrode substrate; the separator separates the positive and negative electrodes, and does not allow electrons to pass through, but allows The ions in the diaphragm transport the charge generated when the positive and negative electrodes react; the electrolyte is consumed in the middle of the nickel-metal hydride battery and mainly plays a conductive role. The electrolyte sho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/48H01M4/583H01M10/28H01M10/30
CPCH01M4/364H01M4/38H01M4/383H01M4/48H01M4/583H01M10/28H01M10/30Y02E60/10Y02P70/50
Inventor 梁德声杨银娥王守军
Owner SHENZHEN EPT BATTERY
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