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A method for detecting lead ion content in separators of power-type lead-acid batteries

A technology of lead-acid batteries and detection methods, applied in the direction of color/spectral characteristic measurement, etc., to achieve the effect of filling the technical gap, reliable results, and stable experimental results

Active Publication Date: 2020-02-14
CHAOWEI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method can only detect the prepared battery, and the battery must be dissected. If the content of lead ions in the separator can be detected during the battery preparation stage, the battery can be adjusted in time to improve the product quality and quality of the battery. pass rate, reduced cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Make a standard curve: according to the battery formula, the Pb calculated according to the theoretical content of lead ions in the electrolyte 2+ Concentration of Pb prepared in 18 concentration gradients 2+ Standard solution, the concentrations are 0.5g / L, 0.7g / L, 0.9g / L, 1.1g / L, ..., 4.1g / L. Different concentrations of Pb were tested on a graphite furnace atomic absorption spectrometer 2+ The absorbance of the standard solution is linearly regressed according to the concentration of the standard solution and the absorbance to obtain a standard curve.

[0029] Sample measurement: Select the No. 1 battery, extract the free acid solution on the surface of the 6 single grid plates of 6 batteries that have been formed and are in the acid pumping and charging stage, and the sampling volume is 1mL, and measure the absorbance on the atomic absorption spectrometer. Calculate the content of lead ions in the electrolyte based on the total volume of the electrolyte and the sam...

Embodiment 2

[0031] Make a standard curve: according to the battery formula, the Pb calculated according to the theoretical content of lead ions in the electrolyte 2+ Concentration of Pb prepared in 12 concentration gradients 2+ Standard solution, the concentrations are 0.2g / L, 0.5g / L, 0.8g / L, 1.1g / L, ..., 3.8g / L. Different concentrations of Pb were tested on a graphite furnace atomic absorption spectrometer 2+ The absorbance of the standard solution is linearly regressed according to the concentration of the standard solution and the absorbance to obtain a standard curve.

[0032] The sample measurement method is the same as in Example 1.

Embodiment 3

[0034] Make a standard curve: according to the battery formula, the Pb calculated according to the theoretical content of lead ions in the electrolyte 2+ Concentration of Pb prepared in 15 concentration gradients2+ Standard solution, the concentrations are 0.3g / L, 0.4g / L, 0.5g / L, ..., 1.8g / L. Different concentrations of Pb were tested on a graphite furnace atomic absorption spectrometer 2+ The absorbance of the standard solution is linearly regressed according to the concentration of the standard solution and the absorbance to obtain a standard curve.

[0035] The sample measurement method is the same as in Example 1.

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Abstract

The invention relates to the technical field of lead acid storage batteries and discloses a method for detecting the content of the lead ion in a separator of the power type lead storage battery. According to the method, the content of the lead ion in the separator of the power type lead storage battery is calculated by detecting the concentration of the lead ion in a free acid solution on the surface of the formed storage battery in an acid extraction charging stage. The method is simple and easy to operate, the experiment result is sable, the structure of the battery is not broken in the measurement, the detection is conducted in the preparation stage of the battery, the thickness of the separator of the battery is regulated according to the data result, or the problem of penetration ofa dendritic crystal of the separator caused by the too high concentration of the ion is reduced by changing the process, the percent of pass of the battery is increased, the production cost of the enterprise is lowered, the method is suitable for the industrial production and the practical application, the problem that the concentration of the Pb<2+> ion in an electrolyte of the lead acid storagebattery cannot be accurately effectively detected is solved, and the technical blank of the detection of the concentration of the Pb<2+> ion in the electrolyte is filled in the preparation process ofthe battery is filled.

Description

technical field [0001] The invention relates to the technical field of lead-acid batteries, in particular to a method for detecting the content of lead ions in separators of power-type lead-acid batteries. Background technique [0002] Lead-acid battery is a charging power source with stable performance and high safety. It is very important to analyze the internal discharge capacity and terminal voltage level of the battery to improve the battery life. The reaction mechanism of the positive and negative electrodes of the lead-acid battery is a dissolution-precipitation mechanism, and the discharge process: PbO 2 Dissolved into the electrolyte to generate Pb 4+ , Pb 4+ Ions generate Pb under the action of external electrons 2+ ions, lead ions and SO 4 Ionic crystallization to generate PbSO 4 . Charging process: solid PbSO in positive and negative electrodes 4 It dissolves into lead ions in the electrolyte, and the lead ions generate Pb at the positive electrode under t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/31
Inventor 吴亮张绍辉
Owner CHAOWEI POWER CO LTD
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