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Alkaline accumulator

A storage battery, alkaline technology, applied in the direction of alkaline storage batteries, alkaline storage battery electrodes, etc., can solve the problems of insufficient utilization of battery active materials, deterioration of battery sealing performance, affecting discharge capacity, etc., to improve gas recombination capacity, reduce The occurrence of battery short circuit and the effect of improving cycle life

Inactive Publication Date: 2006-02-22
CHUNLAN GROUP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0024] However, these methods do not deviate from the scope that the positive electrode and the negative electrode have the same area, which often leads to the inability to fully utilize the active material of the battery, thereby affecting the discharge capacity, or greatly increasing the battery cost or complicating the electrode manufacturing process. The pressure is still high. During the charging and discharging cycle, the safety valve opens too frequently, resulting in loss of electrolyte, poor sealing performance of the battery, and reduced cycle life.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment one: Positive pole is made: be to make Ni(OH) 2 , conductive agent, additives, and binders are composed of a slurry in a certain proportion, coated on the foamed nickel current collector, dried and rolled to form an electrode.

[0039] Negative electrode production: the hydrogen storage alloy, conductive agent, additive, and binder are composed of a slurry in a certain proportion, coated on the foamed nickel current collector, dried and rolled to form an electrode.

[0040] The production of the battery: wrap one of the above-mentioned positive and negative electrodes with a separator, and place the positive and negative electrodes overlapping each other. When the positive and negative electrodes are stacked, you can use figure 1 , figure 2 , image 3 or Figure 4 form, figure 1 The sides of the positive pole 1 do not exceed the sides of the negative pole 2, only the positive pole tab 3 is exposed, and the negative pole tab 4 is in the upper right corner...

Embodiment 2

[0041] Embodiment 2: The production of the positive and negative electrodes and the battery is the same as that of Embodiment 1. According to Table 2, when the value of b is constant, different values ​​of c are used to compare the internal pressure after assembling the battery for 100 cycles. Wherein, the b value is the length coefficient value of the left and right sides of the positive and negative electrodes described in the claims.

[0042] With the structure of the present invention, the surface area of ​​the negative electrode is greater than the surface area of ​​the positive electrode, and the upper end of the negative electrode is higher than the upper end of the positive electrode, which can reduce the internal pressure of the battery by more than 60%, and the greater the coefficient value indicating the relationship between the positive and negative electrode area and the length of the left and right sides, the greater the internal pressure drop. Not obvious. It ca...

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Abstract

The invention relates to an alkaline accumulator. It includes positive pole, negative pole, insulator and shell. Area of the negative pole is larger than the area of the positive pole. Upper end of the negative pole is higher than the height of upper end of the positive pole. The relationship of areas between positive pole and negative pole is described by the formula: S(+)=aS(-) where a=0-1.0. The invented alkaline accumulator can lower internal pressure of battery, raise use rate of active material in pole and reduce incidence rate of battery short circuit.

Description

technical field [0001] The invention relates to an alkaline storage battery. Background technique [0002] The size of the internal pressure and whether it can be balanced are the key factors affecting the life of the alkaline battery. According to the design of the MH-Ni battery, it is generally a positive limit principle, that is, the capacity of the negative electrode is excessive, and the capacity of the entire battery is determined by the capacity of the positive electrode. The ideal MH-Ni The charging and discharging process of Ni battery follows the following reaction [0003] positive electrode: <chemistry num="001"> <chem file="00135427_cml001.xml" / > < / chemistry> (1) [0004] <chemistry num="002"> <chem file="00135427_cml002.xml" / > < / chemistry> (2) [0005] Overall response: <chemistry num="003"> <chem file="00135427_cml003.xml" / > < / chemistry> (3) [...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/24H01M10/24
CPCY02E60/124Y02E60/10
Inventor 陶建幸沈建葛建生李瑾冯夏至盛刚
Owner CHUNLAN GROUP CORP
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