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Lead-acid storage battery negative electrode lead paste

A technology of lead-acid battery and negative electrode paste, which is applied in the direction of lead-acid battery electrodes, battery electrodes, circuits, etc. It can solve the problems of bad influence of the battery formation process, the amount of addition should not be too high, and battery capacity decline, etc., to prolong the life of the battery , prolong the service life, overcome the effect of softening

Active Publication Date: 2014-12-31
CHAOWEI POWER CO LTD
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Adding phosphoric acid to the battery is an effective means to overcome the softening of the positive plate of the battery, but for the internalization of the battery, adding phosphoric acid to the electrolyte will lead to poor formation effect, resulting in a decrease in battery capacity
It is feasible to add slightly soluble phosphate to the positive electrode formula, but the added amount should not be too high, because as the added amount increases, the number of dissolved phosphate ions will also increase. When the phosphate ion concentration reaches a certain level Or it will have adverse effects on the battery formation process

Method used

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Embodiment 1

[0021] A lead-acid battery negative lead paste, the mass fraction of each component of the negative lead paste is: lead powder 79.0%, sulfuric acid 6%, short fiber 0.1%, deionized water 11.5%, calcium phosphate 1%, zinc phosphate 1% , carbon 0.3%, lignin 0.3%, humic acid 0.1%, barium sulfate 0.7%.

Embodiment 2-9

[0023] A kind of lead-acid accumulator negative electrode lead paste, the formula of this negative electrode lead paste is shown in Table 1.

[0024] Table 1

[0025]

[0026] The above components and paste were made into plates, and the experiments were carried out after assembling the battery. The specific experimental conditions are shown in Table 2 (take 12V12Ah battery as an example), and the life curve is as follows figure 1 and figure 2 shown. according to figure 1 , figure 2 From the data in Table 2, it can be seen that the initial capacity, charge acceptance and cycle life of the battery are not affected, but the cycle life is significantly improved.

[0027] Table 2

[0028]

[0029] Blank formula (mass fraction): 6% sulfuric acid, 0.1% short fiber, 11.5% deionized water, 0.3% carbon, 0.3% lignin, 0.1% humic acid, 0.7% barium sulfate, and the balance is lead powder.

[0030] The lead-acid battery negative lead paste and the paste prepared in each embod...

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Abstract

The invention relates to a lead-acid storage battery negative electrode lead paste comprising the following components by mass: 3%-15% of sulfuric acid, 5%-20% of water, 0.05%-2% of short fiber, 0.05%-2% of lignin, 0.05%-2% of humic acid, 0.05%-2% of barium sulfate, 0.01-10% of phosphate, 0.1-1% of C, and balance of lead powder. Through addition of the phosphate harmless to a negative electrode into the negative electrode, the phosphate slowly dissolves out the battery using process, and diffuses to a positive electrode to promote alpha PbO2 generation and overcome the softening of a positive electrode plate.

Description

technical field [0001] The invention relates to a negative electrode paste of a lead-acid storage battery, in particular to a negative electrode paste of a lead-acid storage battery. Background technique [0002] The traditional lead-acid battery negative electrode paste formula is mainly composed of lead powder, sulfuric acid, water, carbon, and lignin, humic acid, barium sulfate and other expansion agents mixed in a certain proportion, and the content of carbon components in this formula is Very low, that is because the increase in the content of carbon materials improves the performance of the battery, but the presence of carbon materials will reduce the gas evolution potential of the negative electrode, resulting in an increase in the amount of gas evolved during the use of the battery, severe water loss and shortened life. . [0003] A major limiting factor in the cycle life of current lead-acid batteries is the softening of the positive electrode. Especially for inte...

Claims

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Application Information

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IPC IPC(8): H01M4/57H01M4/62H01M4/14
CPCH01M4/14H01M4/57H01M4/628Y02E60/10
Inventor 马永泉李斌
Owner CHAOWEI POWER CO LTD
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