CN111157420A - Method for detecting through hole rate of AGM separator - Google Patents
Method for detecting through hole rate of AGM separator Download PDFInfo
- Publication number
- CN111157420A CN111157420A CN201911117961.XA CN201911117961A CN111157420A CN 111157420 A CN111157420 A CN 111157420A CN 201911117961 A CN201911117961 A CN 201911117961A CN 111157420 A CN111157420 A CN 111157420A
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- China
- Prior art keywords
- sample
- adjusting
- circular grid
- air
- hole
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- 238000000034 method Methods 0.000 title claims abstract description 15
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000005192 partition Methods 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 5
- 230000000630 rising effect Effects 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000002791 soaking Methods 0.000 claims abstract description 4
- 239000003792 electrolyte Substances 0.000 description 7
- 238000012360 testing method Methods 0.000 description 5
- 239000002253 acid Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000005587 bubbling Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/088—Investigating volume, surface area, size or distribution of pores; Porosimetry
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- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
The invention relates to a method for detecting the porosity of an AGM separator, which comprises the following steps: step 1, cutting a sample on a sample cutting machine, numbering the sample, and immersing the sample in isopropanol for soaking; step 2, adjusting an air source switch and controlling the pressure of compressed air; adjusting an adjusting switch to control the rising speed of a water column of the U-shaped pressure gauge; step 3, placing the sample on a hole measuring device, padding a soft rubber pad, screwing down a hood, and filling isopropanol; closing a switch at the bottom of the hole detecting device, and introducing compressed air; step 4, finely adjusting the speed of introducing compressed air, and after the first air bubble appears on the liquid level, continuously introducing air at a constant speed for 1min and then photographing the upper part of the hole measurer; and 5, taking a circular grid, wherein the diameter of the circular grid is the same as that of the partition sample, and the inside of the circular grid is a square grid with the side length of 2 mm. The circular grid 1 was compared to the photographs. The method is simple to operate, and is quick and effective.
Description
Technical Field
The invention relates to the field of lead-acid storage batteries.
Background
The lead-acid storage battery mainly comprises a positive electrode, a negative electrode, a partition plate and electrolyte. The quality of the separator, which is an important component constituting the chemical source of electric energy, directly affects the performance of the chemical source of electric energy. The AGM separator is a porous insulating material positioned between the positive plate and the negative plate, and is mainly used for preventing the positive plate and the negative plate from being short-circuited and ensuring good free flow of electrolyte. The preservation of a large amount of electrolyte and the free flow of electrolyte have a crucial influence on the capacity, voltage, low temperature, etc. of the battery. The flow and storage of the electrolyte is related to the porosity of the separator, and a good separator should have the characteristics of high porosity, low resistance, etc., so that the characteristics of the electrolyte in the separator can be utilized to the maximum extent. The AGM separator is mainly open-porous and wherein the open-porous comprises through-holes and non-through-holes. The through holes have great influence on the fluidity of the electrolyte and the internal resistance of the separator, so that the porosity test of the through holes is particularly important in the process of testing the porosity of the separator.
Disclosure of Invention
In order to solve the technical problem, the invention provides a method for detecting the porosity of an AGM separator, which comprises the following steps: step 1, cutting a sample on a sample cutting machine, numbering and immersing in isopropanol for soaking. Step 2, adjusting an air source switch and controlling the pressure of compressed air; adjusting an adjusting switch to control the rising speed of a water column of the U-shaped pressure gauge; step 3, placing the sample on a hole measuring device, padding a soft rubber pad, screwing down a hood, and filling isopropanol; and closing a switch at the bottom of the hole detecting device and introducing compressed air. And 4, finely adjusting the speed of introducing compressed air, and after the first air bubble appears on the liquid level, continuously introducing air at a constant speed for 1min and then photographing the upper part of the hole measurer. And 5, taking a circular grid, wherein the diameter of the circular grid is the same as that of the partition sample, and the inside of the circular grid is a square grid with the side length of 2 mm. The circular grid 1 was compared to the photographs.
The method for detecting the through hole rate of the AGM separator is simple to operate, and is quick and effective.
Detailed Description
The method for detecting the through hole rate of the AGM separator comprises the following steps:
step 1, cutting a sample on a sample cutting machine, numbering the sample, and immersing the sample in isopropanol for soaking;
step 2, adjusting an air source switch and controlling the pressure of compressed air; adjusting an adjusting switch to control the rising speed of a water column of the U-shaped pressure gauge;
step 3, placing the sample on a hole measuring device, padding a soft rubber pad, screwing down a hood, and filling isopropanol; closing a switch at the bottom of the hole detecting device, and introducing compressed air;
step 4, finely adjusting the speed of introducing compressed air, and after the first air bubble appears on the liquid level, continuously introducing air at a constant speed for 1min and then photographing the upper part of the hole measurer;
and 5, taking a circular grid, wherein the diameter of the circular grid is the same as that of the partition board sample, and comparing the circular grid with the photographed image. And marking the position of the bubble in the shot chart and the comparison circular grid chart and counting the number of grids.
By comparing the position and the number W of bubbles in the circular mesh, the area of the mesh is S, and the porosity of the AGM separator is P ═ W × 4/S.
And (4) testing different samples respectively, and taking the average value of the through hole rate results.
The invention is further described with reference to specific examples.
Five samples with the diameter of 50 +/-5 mm are cut on a sample cutting machine, numbered and then soaked in isopropanol for 10 min.
Adjusting an air source switch, and controlling the pressure of compressed air to be 0.10MPa +/-0.01 MPa; adjusting an adjusting switch to enable the rising speed of a water column of the U-shaped pressure gauge to be 5mm/s +/-1 mm/s; placing the sample on a hole measurer, padding a soft rubber pad, screwing down a cover cap, and filling isopropanol; and closing a switch at the bottom of the hole detecting device and introducing compressed air. And finely adjusting the speed of introducing compressed air, and after the first air bubble appears on the liquid level, continuously introducing air at a constant speed for 1min and then photographing the upper part of the hole measurer.
A circular grid is taken, the diameter of the circular grid is the same as that of the partition sample, and the inside of the circular grid is a square grid with the side length of 2 mm. And comparing the circular grid 1 with the shot, marking the position of the bubble in the shot circular grid graph, counting the number of grids as W, and judging the area of the grids as S, wherein the through hole rate of the AGM separator is P (W4/S).
5 samples are tested respectively, and the average value of the through hole rate results is taken.
The method is mainly characterized in that a grid and photographing comparison step is added according to a device for measuring the maximum aperture of the partition plate by a bubble method, and the through-hole rate of the partition plate is calculated by calculating the area of bubbling and the area of the grid.
The invention mainly relates to a method for testing the porosity of an AGM separator. The method utilizes a device for testing the maximum aperture of the partition board, and calculates the through-hole rate of each partition board through photo-grid comparison. The method is simple to operate, and is quick and effective. By the method, the through hole rate of the separator of different manufacturers can be calculated, and the hole distribution of the AGM separator can be visually seen, so that the separator is optimized.
Claims (1)
1. A method for detecting the porosity of an AGM separator, which is characterized by comprising the following steps: step 1, cutting a sample on a sample cutting machine, numbering the sample, and immersing the sample in isopropanol for soaking;
step 2, adjusting an air source switch, controlling the pressure of compressed air, and adjusting an adjusting switch to control the rising speed of a water column of the U-shaped pressure gauge;
step 3, placing the sample on a hole measuring device, padding a soft rubber pad, screwing down a hood, and filling isopropanol; closing a switch at the bottom of the hole detecting device, and introducing compressed air;
step 4, finely adjusting the speed of introducing compressed air, and after the first air bubble appears on the liquid level, continuously introducing air at a constant speed and then photographing the upper part of the hole measurer;
and 5, taking a circular grid, wherein the diameter of the circular grid is the same as that of the partition board sample, and comparing the circular grid with the photographed image. And marking the position of the bubble in the shot chart and the comparison circular grid chart and counting the number of grids.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2019110367679 | 2019-10-29 | ||
| CN201911036767 | 2019-10-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111157420A true CN111157420A (en) | 2020-05-15 |
Family
ID=70555995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911117961.XA Pending CN111157420A (en) | 2019-10-29 | 2019-11-15 | Method for detecting through hole rate of AGM separator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111157420A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112510275A (en) * | 2020-11-20 | 2021-03-16 | 天能电池集团股份有限公司 | Matching method of storage batteries for electric vehicle |
| CN113237809A (en) * | 2021-04-16 | 2021-08-10 | 贵州电网有限责任公司 | Composite insulator core rod porosity evaluation method |
Citations (7)
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| CN201909621U (en) * | 2010-12-15 | 2011-07-27 | 莱州联友金浩新型材料有限公司 | Testing device used for maximum apertures of diaphragms of nickel-metal hydride batteries |
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| CN102914492A (en) * | 2012-10-18 | 2013-02-06 | 北京邮电大学 | Method for determining porosity of gold plating layer by utilizing sulfite solution |
| CN102954918A (en) * | 2012-11-05 | 2013-03-06 | 华北电力大学 | Measurement apparatus capable of concurrently measuring elastic modulus and airtightness of ceramic material, and method thereof |
| CN105674919A (en) * | 2016-03-29 | 2016-06-15 | 福州大学 | Gelled lead acid battery diaphragm pore size distribution measurement method |
| DE202016006152U1 (en) * | 2016-09-30 | 2016-11-30 | IAB - Institut für Angewandte Bauforschung Weimar gemeinnützige GmbH | Measuring and testing device for the detection of bubbles in optically accessible liquids |
| CN208366795U (en) * | 2018-07-06 | 2019-01-11 | 天长市永昌玻纤制品有限公司 | A kind of porosity-determining devices of superfine glass fibre partition board |
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2019
- 2019-11-15 CN CN201911117961.XA patent/CN111157420A/en active Pending
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| CN201909621U (en) * | 2010-12-15 | 2011-07-27 | 莱州联友金浩新型材料有限公司 | Testing device used for maximum apertures of diaphragms of nickel-metal hydride batteries |
| CN102879312A (en) * | 2012-09-24 | 2013-01-16 | 先进储能材料国家工程研究中心有限责任公司 | Method capable of continuously monitoring change of porosity of porous material and detecting porosity value |
| CN102914492A (en) * | 2012-10-18 | 2013-02-06 | 北京邮电大学 | Method for determining porosity of gold plating layer by utilizing sulfite solution |
| CN102954918A (en) * | 2012-11-05 | 2013-03-06 | 华北电力大学 | Measurement apparatus capable of concurrently measuring elastic modulus and airtightness of ceramic material, and method thereof |
| CN105674919A (en) * | 2016-03-29 | 2016-06-15 | 福州大学 | Gelled lead acid battery diaphragm pore size distribution measurement method |
| DE202016006152U1 (en) * | 2016-09-30 | 2016-11-30 | IAB - Institut für Angewandte Bauforschung Weimar gemeinnützige GmbH | Measuring and testing device for the detection of bubbles in optically accessible liquids |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112510275A (en) * | 2020-11-20 | 2021-03-16 | 天能电池集团股份有限公司 | Matching method of storage batteries for electric vehicle |
| CN113237809A (en) * | 2021-04-16 | 2021-08-10 | 贵州电网有限责任公司 | Composite insulator core rod porosity evaluation method |
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Application publication date: 20200515 |