Gelled lead acid battery diaphragm pore size distribution measurement method

A technology of lead-acid battery and pore size distribution, which is applied in the direction of measuring devices, fluid utilization devices, instruments, etc., to achieve the effects of accurate pore size distribution, shortened measurement time, and accurate results

Inactive Publication Date: 2016-06-15
FUZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, there is no special method for measuring the pore size distribution of the separator of the colloidal lead-acid battery, so as to realize real-time tracking and monitoring of the pore size distribution of the improved separator.

Method used

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  • Gelled lead acid battery diaphragm pore size distribution measurement method
  • Gelled lead acid battery diaphragm pore size distribution measurement method
  • Gelled lead acid battery diaphragm pore size distribution measurement method

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0033] 1. Preparation of colloidal lead-acid battery separator:

[0034] Weigh 5g of PVC and dissolve it in 45g of DMF solution, add 1.2wt% stock solution of coupling agent (KH-550), heat and stir at 70°C for 2h;

[0035] Weigh 15g of 300-400 mesh diatomite and add it, and stir thoroughly at room temperature for 10 minutes;

[0036] Pour the resulting mixture into a sealed container, and place it in a constant temperature water bath at 40°C for 30 minutes for defoaming;

[0037] Scrape with a 1000μm scraper to form a sheet, and let it stand for 400s;

[0038] Put it into a 70°C aqueous solution to release the mold into pieces, take it out after 2 hours, and dry it at 60°C for 2 hours;

[0039] Place in 0.2% non-ionic surfactant TX-100 aqueous solution at 25°C, take it out after 2 hours, and dry at 60°C for 2 hours to obtain separator A;

[0040] 2, measure dividing plate aperture distribution situation with measuring method of the present invention:

[0041] Cut the above ...

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Abstract

The invention provides a gelled lead acid battery diaphragm pore size distribution measurement method, which is convenient to test and accurate in testing result. A bubble pressure method based on a capillary action principle is adopted to measure a wet curve Fw and a dry curve Fv; according to the ratio of an opened diaphragm pore area R(r)=(Fw / Fv)*100%, differentiation is carried out between the R(r) and the pore size, and a diaphragm pore size distribution function f(r)=d(R(r)) / dr is obtained. The gelled lead acid battery diaphragm pore size distribution measurement method has the beneficial effects that when the wet curve is measured, a diaphragm sample is placed in an ethanol solution for being immersed, the actually-acted pore conditions after the diaphragm is assembled in a battery can be truly reflected, the added pressure value is 0.001 to 0.01 MPa each time, and the obtained result is accurate. The method of the invention is convenient to test, the obtained pore size distribution result is accurate, and the result is consistent with results through electron microscope detection and mercury intrusion detection.

Description

technical field [0001] The invention relates to the field of chemical power sources, in particular to a method for measuring the pore size distribution of separators of colloidal lead-acid batteries. Background technique [0002] In chemical power sources, since the advent of lead-acid batteries, people have begun to carry out a lot of research on lead-acid batteries, and have continuously improved and optimized lead-acid batteries, resulting in rapid development of lead-acid batteries. For more than one hundred years, lead-acid batteries have always played the role of important secondary batteries. One of the most representative is the valve-regulated lead-acid battery. Generally speaking, there are two ways to fix the electrolyte in valve-regulated lead-acid batteries. One is to use thick fiberboard with large aperture and low price, that is, AGM technology. Most lead-acid batteries in China now use this technology, but it has disadvantages such as too large separator ap...

Claims

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Application Information

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IPC IPC(8): G01B13/10
CPCG01B13/10
Inventor 岳斌
Owner FUZHOU UNIV
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