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Low-temperature nickel-hydrogen battery and preparation method thereof

A nickel-metal hydride battery, low-temperature technology, applied in the manufacture of nickel batteries, alkaline batteries, battery electrodes, etc., can solve the problems of low charge and discharge efficiency, nickel-metal hydride batteries cannot be charged and discharged normally and effectively, and improve low-temperature performance and increase Effect of Low Temperature Charge and Discharge Efficiency

Active Publication Date: 2013-03-06
TIANNENG SAFT ENERGY JOINT CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] With the expansion of the application range of nickel-metal hydride batteries, the disadvantages of low charge and discharge efficiency of nickel-metal hydride batteries in low temperature environments have become increasingly prominent
In the northern part of our country, the outdoor temperature in winter can reach -40~-50°C. In this environment, Ni-MH batteries cannot be charged and discharged normally and effectively.

Method used

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  • Low-temperature nickel-hydrogen battery and preparation method thereof
  • Low-temperature nickel-hydrogen battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Positive electrode production:

[0056] (1) Compact the area of ​​the positive electrode substrate foamed nickel from the edge 3mm to form a tight foamed nickel edge;

[0057](2) Mix nickel hydroxide, cobalt-coated spherical nickel hydroxide, cobaltous oxide, and yttrium oxide uniformly in a weight ratio of 82:10:7:1, and then fill it up to step (1) using the nickel-hydrogen battery dry positive electrode process The prepared nickel foam is rolled and cut to make a positive electrode of a nickel-metal hydride battery.

[0058] Negative production:

[0059] (1) The hydrogen storage alloy powder is rolled onto the copper grid of the negative electrode substrate using the nickel-metal hydride battery dry method negative electrode process, and then a layer of polytetrafluoroethylene emulsion is soaked on the surface of the negative electrode substrate (using the polytetrafluoroethylene emulsion used in the prior art ), after drying and rolling, the negative electrode shee...

Embodiment 2

[0065] Positive electrode production:

[0066] (1) Compact the area of ​​the positive electrode substrate foamed nickel from the edge 3mm to form a tight foamed nickel edge;

[0067] (2) Mix nickel hydroxide, cobalt-coated spherical nickel hydroxide, cobaltous oxide, and yttrium oxide uniformly in a weight ratio of 82:9:7:2, and then use the nickel-metal hydride battery dry positive electrode process to fill up to step (1) The prepared nickel foam is rolled and cut to make a positive electrode of a nickel-metal hydride battery.

[0068] Negative production:

[0069] (1) The hydrogen storage alloy powder is rolled onto the copper grid of the negative electrode substrate by using the nickel-hydrogen battery dry negative electrode process, and then a layer of polytetrafluoroethylene emulsion is soaked on the surface of the negative electrode substrate, and after drying and rolling, the negative electrode sheet is obtained ;

[0070] (2) Place the negative pole piece in 1.0 g / L...

Embodiment 3

[0075] Positive electrode production:

[0076] (1) Compact the area of ​​the nickel foam of the positive electrode substrate 2 mm from the edge to form a tight foam nickel edge;

[0077] (2) Mix nickel hydroxide, cobalt-coated spherical nickel hydroxide, cobaltous oxide, and yttrium oxide in a weight ratio of 82:8:9:1, and then use the nickel-hydrogen battery dry positive electrode process to fill to step (1) The prepared nickel foam is rolled and cut to make a positive electrode of a nickel-metal hydride battery.

[0078] Negative production:

[0079] (1) The hydrogen storage alloy powder is rolled onto the copper grid of the negative electrode substrate by using the nickel-hydrogen battery dry negative electrode process, and then a layer of polytetrafluoroethylene emulsion is soaked on the surface of the negative electrode substrate, and after drying and rolling, the negative electrode sheet is obtained ;

[0080] (2) Place the negative pole piece in 1.5g / L potassium hydr...

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Abstract

The present invention discloses a low-temperature nickel-hydrogen battery, which comprises a positive electrode, a negative electrode and an electrolyte, wherein active materials of the positive electrode comprise nickel hydroxide, cobalt-coated spherical nickel hydroxide, and yttrium oxide, a weight ratio of the nickel hydroxide to the cobalt-coated spherical nickel hydroxide to the yttrium oxide is 100:5-15:1-3, a substrate of the positive electrode is foam nickel, and the edge of the foam nickel has a compaction white edge with a width of 2-3 mm. The present invention further discloses a preparation method for the low-temperature nickel-hydrogen battery. The low-temperature nickel-hydrogen battery can maintain high charging efficiency under a low temperature environment, such that electrolyte solidification inside the nickel-hydrogen battery under a low temperature environment can be avoided, and a use temperature range of the nickel-hydrogen battery is expanded. In addition, characteristics of simple preparation and low cost are provided.

Description

technical field [0001] The invention relates to the technical field of nickel-hydrogen batteries, in particular to a nickel-hydrogen battery capable of maintaining relatively high charging efficiency in a low-temperature environment and a preparation method thereof. Background technique [0002] Because the cadmium in the nickel-cadmium battery (Ni-Cd) used in large quantities is poisonous at present, the disposal of the waste nickel-cadmium battery is complicated and the environment is polluted. Therefore, the nickel-cadmium battery is gradually replaced by the nickel-metal hydride battery (Ni- MH) replaced. [0003] As a substitute for nickel-cadmium batteries, nickel-metal hydride batteries have the same shape and electrochemical characteristics as nickel-cadmium batteries, but they are safe and environmentally friendly. They no longer use toxic cadmium and can eliminate environmental pollution from heavy metal elements. [0004] Ni-MH batteries have a larger energy dens...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M10/30H01M10/28
CPCY02E60/124Y02E60/10Y02P70/50
Inventor 顾余成张继强朱云莫志琴何英钱亮
Owner TIANNENG SAFT ENERGY JOINT CO
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