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Alkaline storage battery

A storage battery and alkaline technology, which is applied in the field of alkaline storage batteries, can solve the problems of self-discharge characteristics reduction, and achieve the effect of reducing and inhibiting self-discharge characteristics

Inactive Publication Date: 2008-05-14
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, even in the alkaline storage battery described in this gazette, the reduction of self-discharge characteristics is unavoidable.

Method used

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  • Alkaline storage battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] (1) Production of positive plate

[0061] Will contain the nickel hydroxide particle of 100 weight parts, the cobalt hydroxide of 7.0 weight parts, the Yb of 1.5 weight parts 2 o 3 , 0.1 parts by weight of carboxymethylcellulose (CMC, thickener) and 0.2 parts by weight of polytetrafluoroethylene (PTFE, binder) are mixed with an appropriate amount of water as a dispersion medium to disperse the positive electrode mixture In water, the positive electrode mixture slurry is prepared. The positive electrode mixture slurry was filled in a foamed nickel porous core material with a thickness of 1.4 mm, and dried in a dryer at 80° C. for 6 hours. Then, the core material carrying the positive electrode mixture is rolled by rolling to make the thickness about 0.7mm, and then cut into a predetermined size to design the positive electrode plate.

[0062] The obtained positive electrode plate contained cobalt as an elutable metal, and the amount of the elutable metal contained in ...

Embodiment 2

[0074] will contain Al 2 o 3 The battery of Example 2 was produced in the same manner as in Example 1 except that the porous coating film was formed on both surfaces of the positive electrode plate instead of both surfaces of the negative electrode plate.

Embodiment 3

[0076] will contain Al 2 o 3 The battery of Example 3 was produced in the same manner as in Example 1, except that the porous coating film was formed on both sides of the separator instead of both sides of the negative electrode plate.

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Abstract

The present invention relates to an alkaline accumulator; wherein, at least one of the surface of the membrane, the positive plate and the negative plate contains metallic compound; at least one of the positive plate and the negative plate contains the dissolvable metal; and the metallic compound makes the dissolvable metal dissolved from the alkaline electrolyte be separated out at the surface of the membrane, the surface or the inside of the positive plate, or the surface of the inside of the negative plate. Consequently, an alkaline accumulator which promises seldom self discharge and has long service life can be available.

Description

technical field [0001] The invention relates to an alkaline storage battery, in particular to a nickel-metal hydride storage battery using a hydrogen storage alloy. Background technique [0002] In recent years, alkaline storage batteries have attracted attention as power sources for portable devices, electric vehicles, hybrid vehicles, and the like. In addition, with the development of portable equipment and the like, higher performance is required for alkaline storage batteries used as power sources. Alkaline storage batteries include, for example, nickel-metal hydride storage batteries, alkaline zinc storage batteries, and the like. [0003] Among them, nickel-metal hydride storage batteries are widely used as secondary batteries with high energy density and excellent reliability. A nickel-metal hydride storage battery has a positive electrode containing nickel hydroxide and a negative electrode containing a hydrogen storage alloy. In order to improve the conductivity ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/30
CPCY02E60/124H01M10/24H01M4/626H01M4/624Y02E60/10
Inventor 谷口明宏
Owner PANASONIC CORP
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