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Method for testing utilization rate of acid in active substance of lead-acid storage battery

A technology of lead-acid batteries and active substances, which is applied in the direction of chemical analysis, measuring devices, and instruments using titration, which can solve problems such as high return rate, deviation of acid addition, and interference in the determination of pure sulfuric acid, so as to improve battery quality, Reduced return rate and high accuracy

Active Publication Date: 2019-01-25
CHAOWEI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the sales process of lead-acid batteries, most of the reasons for returns are closely related to sulfuric acid. Some products have too much acid, and some products are too little. The acid content in lead-acid batteries leads to low pass rates and return rates. high immediate cause
[0003] In the actual production and design process of lead-acid batteries, the acid contained in the battery raw plate not only includes the actual amount of acid added, but also includes the acid brought in by the process of mixing paste and leaching acid; in addition, the acid adding equipment is preset There is also a certain deviation between the value and the actual amount of acid added. The added sulfuric acid contains additives, water and other substances, which cannot accurately reflect the amount of acid added; the above factors will interfere with the determination of the amount of pure sulfuric acid in the lead-acid battery and affect the accuracy of the measurement. Spend

Method used

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  • Method for testing utilization rate of acid in active substance of lead-acid storage battery
  • Method for testing utilization rate of acid in active substance of lead-acid storage battery
  • Method for testing utilization rate of acid in active substance of lead-acid storage battery

Examples

Experimental program
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Embodiment 1

[0044] Such as figure 1 As shown, the 6DZM20AH lead-acid battery is respectively 1# cell to 6# cell from left to right. There is a positive terminal 5, and the 6# cell is equipped with a negative terminal 6; the bridge 4 is made of lead material, and connects the positive bus bar 3 and the negative bus bar 1 of two adjacent cells;

[0045] (1) Measurement of the acid contained in the weight of the battery raw plate (including the acid brought in by paste, leaching acid, etc.):

[0046] Take several positive and negative green plates from the same pot and ointment, acid, and solidification, and measure the PbSO content of the positive and negative green plates by EDTA titration. 4 Content, multiple data can be measured, and the average value is taken at last, and filled in Form 1:

[0047] Table 1. PbSO in positive and negative raw plates 4 content

[0048]

[0049] (2) According to the following formula, calculate the single cell in the 3# cell by the number of positive...

Embodiment 2

[0061] (1) Measurement of the acid contained in the weight of the battery raw plate (including the acid brought in by paste, leaching acid, etc.):

[0062] Take several positive and negative green plates from the same pot and ointment, acid, and solidification, and measure the PbSO content of the positive and negative green plates by EDTA titration. 4 Content, multiple data can be measured, and the average value is taken at last, and filled in Form 2:

[0063] Table 2. PbSO in positive and negative green plates 4 content

[0064]

[0065] (2) According to the following formula, calculate the single cell in the 5# cell by the number of positive and negative electrodes (4 positive electrodes and 5 negative electrodes of 6DZM20AH battery), the amount of active material on a single positive and negative electrode, and the relative molecular mass of sulfuric acid and lead sulfate The content of pure sulfuric acid contained in the electrode group m 1 =25g:

[0066] m 1 = m (...

Embodiment 3

[0076] (1) Measurement of the acid contained in the weight of the battery raw plate (including the acid brought in by paste, leaching acid, etc.):

[0077] Take several positive and negative green plates from the same pot and ointment, acid, and solidification, and measure the PbSO content of the positive and negative green plates by EDTA titration. 4 Content, multiple data can be measured, and the average value is taken at last, and filled in Form 3:

[0078] Table 3. PbSO in positive and negative raw plates 4 content

[0079]

[0080] (2) According to the following formula, calculate the single cell in the 4# cell by the number of positive and negative electrodes (4 positive electrodes and 5 negative electrodes of 6DZM20AH battery), the amount of active material on a single positive and negative electrode, and the relative molecular mass of sulfuric acid and lead sulfate The content of pure sulfuric acid contained in the electrode group m 1 =28g:

[0081] m 1 = m (am...

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Abstract

The invention relates to the technical field of lead-acid storage batteries, in particular to a method for testing the utilization rate of acid in an active substance of a lead-acid storage battery. The method comprises the following steps of (1) determining the content m1 of pure sulfuric acid contained in a raw polar group of a single cell; (2) determining the adding amount m2 of the pure sulfuric acid in the to-be-tested single cell; (3) determining the extracting amount m3 of the pure sulfuric acid in the to-be-tested single cell; (4) determining the usage amount m0 of the pure sulfuric acid participating in a reaction; (5) calculating the acid utilization rate eta=m0 / (m1+m2-m3) of the to-be-tested single cell; and (6) repeatedly determining the acid utilization rates of the remainingsingle cells. The testing method disclosed by the invention is simple to operate and high in accuracy; the acid utilization of each single cell of the lead-acid storage battery can be accurately determined and fed back to a battery designer; and a design basis is provided for the thickness of a plastic shell, the thickness of a polar plate, the thickness of a partition plate, the acid adding amount and other parameters, so that the quality of the battery is improved, and the return rate is reduced.

Description

technical field [0001] The invention relates to the technical field of lead-acid batteries, in particular to a method for testing the utilization rate of acid in active materials of lead-acid batteries. Background technique [0002] The active materials of lead-acid batteries mainly include positive electrode paste, negative electrode paste and sulfuric acid. The utilization rate of sulfuric acid is 70-80%. It can be seen that the battery is limited by sulfuric acid. In the sales process of lead-acid batteries, most of the reasons for returns are closely related to sulfuric acid. Some products have too much acid, and some products are too little. The acid content in lead-acid batteries leads to low pass rates and return rates. high direct cause. [0003] In the actual production and design process of lead-acid batteries, the acid contained in the battery raw plate not only includes the actual amount of acid added, but also includes the acid brought in by the process of mixi...

Claims

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Application Information

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IPC IPC(8): G01N5/00G01N31/16
CPCG01N5/00G01N31/16
Inventor 陆超张凯
Owner CHAOWEI POWER CO LTD