CN109100253B - Detection method of lead-acid storage battery separator - Google Patents
Detection method of lead-acid storage battery separator Download PDFInfo
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- CN109100253B CN109100253B CN201810727306.5A CN201810727306A CN109100253B CN 109100253 B CN109100253 B CN 109100253B CN 201810727306 A CN201810727306 A CN 201810727306A CN 109100253 B CN109100253 B CN 109100253B
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- G—PHYSICS
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- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
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Abstract
The invention relates to a detection method of a lead-acid storage battery separator, and belongs to the technical field of lead-acid storage battery tests. The method comprises the following steps: firstly, cutting a sample to be detected into a first group, a second group and a third group; testing the acid absorption saturation degree delta G of the first group of samples, and then calculating the mass G2 of the acid required by the third group of samples according to the delta G; putting the second group of samples into a sealing bag to measure the dry height H; putting the third group of samples into a sealed bag, and adding acid to obtain a sample to be tested; setting the minimum compression distance as H', the maximum compression distance as H, recording the initial resilience force F1, recording the resilience force F2 after the recording is finished, and calculating the percentage of the resilience force; sixthly, repeating the cycle for n times by the resilience force test. The detection method is used for testing the performance of the separator of the valve-regulated sealed lead-acid storage battery, and can simulate the actual use state according to the actual use requirement of the lead-acid storage battery, and the detection method can reflect the performance state of the separator product in the use process so as to facilitate manufacturers, customers and the like to select proper types of separators.
Description
Technical Field
The invention belongs to the technical field of lead-acid storage battery testing, and particularly relates to a detection method of a lead-acid storage battery separator.
Background
The design principle of the valve-controlled lead-acid storage battery is that required electrolyte is injected into a polar plate and a partition plate, free electrolyte is not available, the capacity of absorbing oxygen is improved through the moisture of a negative plate, and the storage battery is sealed in order to prevent the electrolyte from being reduced, so the valve-controlled lead-acid storage battery is also called a lean solution battery.
The grids of the valve-controlled lead-acid storage battery mainly adopt lead-calcium alloy to improve overpotential of gassing (hydrogen and oxygen) of the positive and negative electrodes of the battery, so as to achieve the purpose of reducing the gassing amount in the charging process of the battery. Oxygen begins to occur when the positive plate reaches 70% of the charge, and does not begin to occur when the negative plate reaches 90%. In the production process, the ratio of the thickness of the positive plate to the thickness of the negative plate is generally = 6: 4, according to the change of the mass ratio of the positive and negative electrode active materials, when the velvet Pb on the negative electrode reaches 90%, PbO2 on the positive electrode approaches 90%, and after a little charging, the active materials on the positive and negative electrodes respectively reach 95% through oxidation reduction and approach complete charging, thereby reducing the precipitation of hydrogen and oxygen gases. Superfine glass fiber or silica gel is used for absorbing and storing electrolyte and providing a channel for oxygen separated from the anode to diffuse to the cathode. Thus, oxygen is immediately absorbed by the negative electrode once it has diffused to the negative electrode, and the generation of oxygen gas on the negative electrode is suppressed, resulting in the elimination of 90% or more of gas generated during float charge.
The valve control sealed lead-acid storage battery generally adopts an AGM separator as a separator of a positive electrode and a negative electrode, the positive electrode and the negative electrode are separated to prevent short circuit, meanwhile, in order to keep the lead-acid storage battery longer in cycle life, the AGM separator must also ensure that the AGM separator always keeps a pressure state in the use process, and the AGM separator is similar to a spring to extrude positive and negative active substances onto positive and negative grids to prevent the active substances from softening and falling off. At present, the national detection standard 'JB/T7630.1-2008 lead-acid battery superfine glass fiber separator' makes a standard requirement on the physical properties of an AGM separator for a lead-acid battery, however, the actual use requirement of the lead-acid battery separator cannot be met.
Disclosure of Invention
Aiming at the problems, the invention provides a detection method of a lead-acid storage battery separator, which is used for testing the performance of the separator of a valve-regulated sealed lead-acid storage battery, and simulating the actual use state according to the actual use requirement of the lead-acid storage battery.
The technical scheme for solving the problems is as follows:
the detection method of the lead-acid storage battery separator comprises the following steps:
cutting: cutting a sample to be tested into a first group, a second group and a third group, wherein the specifications of the cut samples of the second group and the third group are consistent;
acid absorption saturation test: testing the acid absorption saturation degree deltaG of the first group of samples under the condition of pressure P1 and acid density rho 1, wherein deltaG is equal to the mass of the absorbed acid divided by the mass of the first group of samples, then measuring the mass G1 of the third group of samples, and then calculating the mass G2 of the acid required by the third group of samples to reach the acid absorption saturation under the condition of pressure P1 and acid density rho 1 according to deltaG;
testing the dry height: putting the second group of samples into a sealing bag, applying pressure P1 on the upper surface of the second group of samples, and measuring the height of the second group of samples after the second group of samples are stabilized, namely the dry height H;
fourthly, acid absorption: putting the third group of samples into a sealing bag with the same specification as the sealing bag in the third step, adding acid with the mass of G2 and the density of rho 1, and sealing the sealing bag to obtain a sample to be tested;
testing the resilience force: setting a minimum compression distance as H ', a maximum compression distance as H, wherein H ' is less than H, compressing the test sample to be tested, recording an initial resilience force F1 when the test sample to be tested is compressed to the height of H ', reducing the pressure, recording the resilience force F2 after the test sample to be tested rebounds to the height of H, and calculating the resilience force percentage W = (F2/F1) × 100% of the compression;
repeating the rebound force test for n times to obtain the change rule of the percent of the rebound force along with the repeated cycle times of the rebound force test.
And step two, the acid absorption saturation test can refer to the determination method of the pressurizing acid absorption amount on page 13 of the national detection standard 'JB/T7630.1-2008 lead-acid storage battery superfine glass fiber separator', and the pressure, the sample size and the acid type are automatically selected on the basis.
The dry height of the third step can be measured by a clapboard thickness gauge, and the resilience force of the fifth step can be measured by the clapboard thickness gauge matched with a vernier caliper.
And fourthly, the sealing bags with the same specification are adopted, so that the problem of test difference caused by the thickness of the sealing bags can be avoided, and meanwhile, the leakage of acid is prevented.
In the above-described aspect, the first, second, and third sets of samples in step (i) are preferably cubic in shape.
Preferably, in the step (c), the pressure P1 is 50 kPa.
As the optimization of the technical proposal, the acid in the step (II) is sulfuric acid with rho 1 equal to 1.28 g/ml.
Preferably, after applying the pressure P1 on the upper surface of the second group of samples, the third step of measuring the height of the second group of samples after stabilizing for 6 minutes, namely the dry height H.
Preferably, the sealing bag in the step (iv) and the sealing bag in the step (iii) are the same sealing bag.
Preferably, in the fifth step, H' is 80-90% of H.
Preferably, the time interval between the recording of the initial resilience F1 and the recording of the resilience F2 after the recording is finished is 3 minutes.
Preferably, in the step (c), n is equal to 300.
Preferably, in the sixth step, the resilience force test is repeated for n times, and then a graph of the change rule of the percentage of the resilience force along with the repeated cycle times of the resilience force test is drawn.
In conclusion, the invention has the following beneficial effects:
the detection method of the lead-acid storage battery separator is used for testing the performance of the separator of the valve-regulated sealed lead-acid storage battery, and the performance of the separator is tested by simulating the actual use state according to the actual use requirement of the lead-acid storage battery.
The detection method of the lead-acid storage battery separator can reflect the performance state of the separator product in the use process, so that manufacturers, customers and the like can conveniently select proper types of separators.
Drawings
FIG. 1 is a graph showing the percentage of rebound force of examples 1 to 8 as a function of the number of repeated cycles of the rebound force test;
in the figure, the abscissa is the number of repeated cycles of the elasticity test, and the ordinate is the percentage of the springback force.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. The embodiments of the present invention, and all other embodiments obtained by those skilled in the art without any inventive step, are within the scope of the present invention.
The present invention will be described in detail below by way of examples with reference to the accompanying drawings.
Example 1: the detection method of the lead-acid storage battery separator comprises the following steps:
cutting: cutting a sample to be tested into a first group, a second group and a third group, wherein the first group, the second group and the third group are all cubic in shape, the specification of the first group of the sample is 50 x 50mm, the specification of the second group and the third group of the sample is 100 x 100mm, and the total thickness range is about 20 +/-2 mm in a dry state;
acid absorption saturation test: testing the acid absorption saturation degree deltaG of the first group of samples under the condition of pressure 50kPa and density of sulfuric acid of 1.28G/mL, wherein the deltaG is equal to the mass of the absorbed acid divided by the mass of the first group of samples, then measuring the mass G1 of the third group of samples, and then calculating the mass G2 of the acid required by the third group of samples to reach the acid absorption saturation under the condition of pressure 50kPa and density of sulfuric acid of 1.28G/mL according to the deltaG;
testing the dry height: putting the second group of samples into a sealing bag, applying pressure of 50kPa on the upper surface of the second group of samples by using a clapboard thickness gauge, and measuring the height of the second group of samples after the second group of samples are stabilized for 6 minutes, namely the dry height H;
fourthly, acid absorption: putting the third group of samples into the same sealed bag as the one in the third step, adding sulfuric acid with the mass of G2 and the density of 1.28G/mL, and sealing the sealed bag to obtain a sample to be tested;
testing the resilience force: setting a minimum compression distance as H ' and a maximum compression distance as H, wherein H ' is equal to 90% of H, compressing the sample to be tested by using a partition thickness gauge, recording an initial resilience force F1 when the sample to be tested is compressed to the height of H ', reducing the pressure, recording a resilience force F2 after the end of recording when the height of the sample to be tested rebounds to H, wherein the time interval between the recording of the initial resilience force F1 and the recording of the resilience force F2 after the end is 3 minutes, and calculating the resilience force percentage W = (F2/F1) = 100% of the compression;
repeating the resilience test for 300 times to obtain the change rule of the resilience percentage along with the number of repeated cycles of the resilience test, and then drawing a graph of the change rule of the resilience percentage along with the number of repeated cycles of the resilience test.
Examples 2 to 4: the method for detecting the lead-acid storage battery separator is different from the method in the embodiment 1 in that AGM separators with different factory formulas are adopted.
Examples 5 to 8: the method for detecting the lead-acid storage battery separator is different from the method in example 1 in that AGM separators with different factory formulas are adopted, and H' is set to be equal to 80% H.
In the embodiments 1 to 8, the separator plates of different factory formulas are selected according to the method, the actual use state is simulated for detection, the times of the power battery used by an actual customer are more than 150 cycles, and meanwhile, the resilience percentage of the separator plates is required to be more than 60%, and as can be seen from the figure 1, the separator plates of three formulas can meet the use requirements. The formula of the separator can be screened according to the curve aiming at the separators with different use purposes.
Claims (10)
1. The detection method of the lead-acid storage battery separator is characterized by comprising the following steps:
cutting: cutting a sample to be tested into a first group, a second group and a third group, wherein the specifications of the cut samples of the second group and the third group are consistent;
acid absorption saturation test: testing the acid absorption saturation degree delta G of the first group of samples under the conditions of pressure P1 and acid density rho 1, wherein the acid absorption saturation degree test method is a method for measuring the pressure acid absorption quantity described in the national detection standard JB/T7630.1-2008 lead-acid storage battery superfine glass fiber separator page 13, the delta G is equal to the mass of the absorbed acid divided by the mass of the first group of samples, then measuring the mass G1 of the third group of samples, and then calculating the mass G2 of the acid required when the third group of samples reach acid absorption saturation under the conditions of pressure P1 and acid density rho 1 according to the delta G;
testing the dry height: putting the second group of samples into a sealing bag, applying pressure P1 on the upper surface of the second group of samples, measuring the height of the second group of samples after the second group of samples are stabilized, namely the dry height H, and measuring the dry height by using a clapboard thickness gauge;
fourthly, acid absorption: putting the third group of samples into a sealing bag with the same specification as the sealing bag in the third step, adding acid with the mass of G2 and the density of rho 1, and sealing the sealing bag to obtain a sample to be tested;
testing the resilience force: setting a minimum compression distance as H ' and a maximum compression distance as H, wherein H ' is smaller than H, compressing the test sample to be tested, recording an initial resilience force F1 when the test sample to be tested is compressed to the height of H ', reducing the pressure, recording the resilience force F2 after the recording of the test sample to be tested is finished when the test sample to be tested rebounds to the height of H, measuring the resilience force by adopting a clapboard thickness gauge and a vernier caliper, and calculating the resilience force percentage W = (F2/F1) 100% of the compression;
repeating the rebound force test for n times to obtain the change rule of the percent of the rebound force along with the repeated cycle times of the rebound force test.
2. The method of testing a lead-acid battery separator according to claim 1, wherein: and step (c) the shapes of the first group of samples, the second group of samples and the third group of samples are cubic.
3. The method of testing a lead-acid battery separator according to claim 1, wherein: step (II), the pressure P1 is 50 kPa.
4. The method of testing a lead-acid battery separator according to claim 1, wherein: and step (II), the acid is sulfuric acid with rho 1 equal to 1.28 g/ml.
5. The method of testing a lead-acid battery separator according to claim 1, wherein: and step three, after pressure P1 is applied to the upper surface of the second group of samples, the height of the second group of samples is measured after the second group of samples are stabilized for 6 minutes, and the height is the dry height H.
6. The method of testing a lead-acid battery separator according to claim 1, wherein: the sealing bag in the fourth step and the sealing bag in the third step are the same sealing bag.
7. The method of testing a lead-acid battery separator according to claim 1, wherein: in the fifth step, H' is 80-90% of H.
8. The method of testing a lead-acid battery separator according to claim 1, wherein: the time interval between the recording of the initial resilience force F1 and the recording of the resilience force F2 after the recording is finished is 3 minutes.
9. The method of testing a lead-acid battery separator according to claim 1, wherein: step sixthly, n is equal to 300.
10. The method of testing a lead-acid battery separator according to claim 1, wherein: repeating the resilience force test for n times, and then drawing a change rule graph of the resilience force percentage along with the number of repeated cycles of the resilience force test.
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| CN110196259B (en) * | 2019-05-14 | 2021-08-17 | 超威电源集团有限公司 | Device and method for testing coarse cotton and fine cotton ratio of AGM (absorbent glass mat) separator |
| CN111141502A (en) * | 2019-12-13 | 2020-05-12 | 浙江天能动力能源有限公司 | Method and device for evaluating circulation durability of AGM separator |
| CN111579413B (en) * | 2020-05-06 | 2022-05-24 | 超威电源集团有限公司 | Device for detecting acid saturation of AGM power lead-acid storage battery and using method thereof |
| CN111999446B (en) * | 2020-09-04 | 2021-11-16 | 山东圣阳电源股份有限公司 | Method for detecting wet resilience of AGM separator for valve-controlled sealed lead-acid storage battery |
| CN112945772B (en) * | 2021-02-01 | 2024-03-19 | 中国电建集团成都勘测设计研究院有限公司 | Method for analyzing mechanical properties of engineering rock mass under water-rock circulation |
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| CN2869847Y (en) * | 2005-06-17 | 2007-02-14 | 浙江南都电源动力股份有限公司 | Lead-acid accumulator isolation-plate acid-absorbing value detection device |
| CN201803930U (en) * | 2010-09-19 | 2011-04-20 | 熊利军 | Tester for wet state pressure maintaining performance of AGM separator |
| CN102682305B (en) * | 2012-04-25 | 2014-07-02 | 深圳市迈科龙医疗设备有限公司 | Automatic screening system and automatic screening method using thin-prep cytology test |
| CN203519212U (en) * | 2013-10-18 | 2014-04-02 | 安徽理士电源技术有限公司 | Device for testing pressure change of AGM partition plate |
| CN105699187A (en) * | 2016-03-07 | 2016-06-22 | 天能电池集团有限公司 | Method for detecting circulating durability of wet-state compression and recovery of AGM (absorptive glass mat) separators |
| CN105866333B (en) * | 2016-04-05 | 2018-07-31 | 超威电源有限公司 | A kind of detection device of AGM partition boards hygrometric state compressive deformation |
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