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Negative electrode zinc paste and alkaline battery therewith

A technology of alkaline batteries and negative electrolyte, applied in dry batteries, battery electrodes, circuits, etc., can solve the problems of battery leakage, easy over-discharge, and easy battery leakage, etc., to reduce the leakage rate, reduce the amount of gas evolution, Effect of improving discharge performance

Inactive Publication Date: 2019-09-27
FUJIAN NANPING NANFU BATTERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Alkaline battery capacity design generally adopts the method of excess negative electrode. After the battery is over-discharged, the volume of the negative electrode expands, and the activity of the negative electrode is very high, which will be due to Zn+2KOH→K 2 ZnO 2 +H 2 ↑The reaction is easy to produce a large amount of hydrogen gas, causing liquid leakage in electrical appliances
Although the existing alkaline zinc-manganese batteries can reduce the amount of gas evolution during battery storage and reduce the leakage rate during battery storage, the battery still leaks after overdischarge
The common situation is that the battery is not taken out of the electrical appliance in time after it is fully discharged. Since the electrical appliance generally has a small standby current, the battery is prone to over-discharge if it is not taken out for a long time. In this case, the battery is easy to leak
[0004] For the negative electrode electrolyte containing zinc oxide, since the activity of zinc powder is not high during battery storage, adding a small amount of zinc oxide can inhibit the generation of hydrogen, but the activity of zinc powder when the battery is over-discharged is significantly higher than that of a battery that has not been over-discharged, which makes When the battery is over-discharged, the amount of gas evolution is obvious, which will cause liquid leakage
[0005] Furthermore, the existing alkaline batteries will generate hydrogen gas during use, which affects the service life of the battery, especially the duration of use on electrical appliances such as small motors.

Method used

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  • Negative electrode zinc paste and alkaline battery therewith
  • Negative electrode zinc paste and alkaline battery therewith
  • Negative electrode zinc paste and alkaline battery therewith

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Alkaline batteries of the control group were prepared. In the control group, the negative electrode electrolyte was prepared according to the distribution ratio of each group in Table 1, and the negative electrode zinc paste was prepared according to the ratio in Table 2 to make a control battery.

[0042] Table 1 The proportioning ratio of each component of the negative electrode electrolyte

[0043]

[0044] The negative electrode electrolyte in the above control group does not contain surfactant.

[0045] The proportioning ratio of each component of negative electrode zinc paste of table 2

[0046]

Embodiment 2

[0048] Alkaline batteries of test groups 1 to 3 were prepared. In each test group, the negative electrode electrolyte was prepared according to the proportions of each group in Table 3, and the negative electrode zinc paste was prepared according to the proportions in Table 4 to make test batteries.

[0049] The proportioning ratio of each component of negative electrode electrolyte of table 3

[0050]

[0051] The negative electrode electrolytes in the above-mentioned test groups 1 to 3 did not contain surfactants.

[0052] The proportioning ratio of each component of negative electrode zinc paste of table 4

[0053]

Embodiment 3

[0055] Alkaline battery over-discharge test

[0056] The above-mentioned control group and test groups 1 to 3 were subjected to a 10 ohm overdischarge test and a simulated motor discharge test.

[0057] Battery over-discharge means that the battery continues to discharge after the discharge exceeds the cut-off voltage. For example, the 10-ohm discharge cut-off voltage of an LR6 battery is 0.9V. Over-discharge refers to the case where the cut-off voltage is less than 0.9V. For example, less than 0.8V, 0.6, 0V, etc. belong to the battery The case of overdischarge. Under normal circumstances, if the battery is not over-discharged, the gas volume of the battery is very small, and the battery will not leak, but once the battery is over-discharged, the gas volume of the battery will increase significantly. Leakage occurs. The discharge methods of alkaline batteries in electrical appliances are mainly divided into constant power discharge, constant current discharge, constant resis...

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PUM

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Abstract

The invention provides a negative electrode zinc paste and an alkaline battery therewith. The negative electrode zinc paste comprises a zinc powder, a negative electrode binder and a negative electrode electrolyte. The negative electrode electrolyte contains a predetermined content of alkali metal hydroxide, a surfactant, and zinc oxide, wherein the surfactant accounts for 0.005% to 0.1% by mass of the negative electrode electrolyte. The alkaline battery of the invention uses a negative electrode prepared by the negative zinc paste, so that the continuous discharge performance of the analog motor of the battery can be greatly improved, the amount of evolved gases during the over-discharge of the battery can be greatly reduced, and the liquid leakage rate in the over-discharge process of the battery can be reduced.

Description

technical field [0001] The invention relates to the technical field of batteries, and more specifically relates to a negative electrode zinc paste and an alkaline battery with the same. Background technique [0002] Alkaline zinc-manganese batteries are usually represented by LR, and their models mainly include LR03, LR6, LR14, LR20, LR8D425, etc. In general, alkaline zinc-manganese batteries use zinc as the negative electrode, manganese dioxide as the positive electrode, and potassium hydroxide solution as the electrolyte. [0003] Alkaline battery capacity design generally adopts the method of excess negative electrode. After the battery is over-discharged, the volume of the negative electrode expands, and the activity of the negative electrode is very high, which will be due to Zn+2KOH→K 2 ZnO 2 +H 2 ↑The reaction is easy to produce a large amount of hydrogen gas, causing liquid leakage in electrical appliances. Although the existing alkaline zinc-manganese batteries ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/42H01M4/62H01M4/36H01M6/06
CPCH01M4/362H01M4/42H01M4/621H01M6/06
Inventor 常海涛林建兴沈娟江铭钟晓桥薛祥峰
Owner FUJIAN NANPING NANFU BATTERY
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