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Method for detecting circulating durability of wet-state compression and recovery of AGM (absorptive glass mat) separators

A detection method and compression recovery technology, applied in the direction of applying stable tension/pressure to test material strength, measuring device, strength characteristics, etc. Effect

Inactive Publication Date: 2016-06-22
TIANNENG BATTERY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Consult literature and information. At present, only some people have raised concerns about the compression durability of AGM partitions, but there are no relevant test methods and special equipment for testing.

Method used

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  • Method for detecting circulating durability of wet-state compression and recovery of AGM (absorptive glass mat) separators
  • Method for detecting circulating durability of wet-state compression and recovery of AGM (absorptive glass mat) separators
  • Method for detecting circulating durability of wet-state compression and recovery of AGM (absorptive glass mat) separators

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 100kPa wet cycle durability test of a certain model of manufacturer B

[0034] (1) Sample: Cut into 50mm*50mm small pieces; the actual size measured with a caliper is 50.00mm*49.15mm, the sample area S=2457.5mm 2 , Take 15 pieces and stack them neatly;

[0035] (2) Put the tooling into the operating platform of the tensile machine for zero adjustment.

[0036] (3) Calculate N=P*S=100kPa*2457.5mm 2 / 1000=245.75N; Edit the test plan, the condition is force control, the end force is 245.75N, and the compression rate is 5mm / min. The equipment automatically records the peak pressure as 244.68N; the displacement remains unchanged for 300s, and the compression displacement is 4.667mm and the stable pressure is 211.50N; the sample is returned to the displacement and the return displacement is 19.603mm.

[0037] (4) Peak pressure=peak pressure / sample area=245.75 / 2457.5*1000=99.56kPa;

[0038] Stable pressure=stable pressure / sample area=211.50 / 2457.5*1000=86.06kPa;

[0039] The thickness o...

Embodiment 2

[0046] 60kPa wet cycle durability test of a certain model of AGM separator of C manufacturer

[0047] (1) Sample: Cut into 70mm*50mm small pieces, limited by the sample, the actual size of the sample after cutting is 71.75mm*50.28mm; sample area S=3607.6mm 2 Take 15 pieces and stack them neatly;

[0048] (2) Put the tooling into the operating platform of the tensile machine for zero adjustment.

[0049] (3) Calculate N=P*S=60kPa*3607.6mm 2 / 1000=216.46N; edit the test plan, the condition is force control, the end force is 216.46N, and the compression rate is 5mm / min. The device automatically records the peak pressure as 215.26N; the displacement remains unchanged, the time is 300s, and the compression displacement is 4.5782. mm and a stable pressure of 172.56N; the sample is returned to the displacement to zero, and the return displacement is recorded as 17.870mm.

[0050] (4) Peak pressure=peak pressure / sample area=215.26 / 3607.6*1000=59.67kPa;

[0051] Stable pressure=stable pressure / ...

Embodiment 3

[0059] The separators from four manufacturers of B, C, D, and H are selected and tested according to the method of Example 1. The results are as follows image 3 Shown.

[0060] Through the test, it can be concluded that when the battery design assembly pressure (peak pressure) is 100kPa, the peak pressure and stable pressure of the AGM separators of different manufacturers after 200 cycles are quite different. The wet assembly pressures of the separators of the four manufacturers are From high to low, they are: H, C, D, B.

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Abstract

The invention discloses a method for detecting circulating durability of wet-state compression and recovery of AGM (absorptive glass mat) separators. The method comprises the following steps: (1) a plurality of separator samples are taken, stacked orderly and placed in a detection device; (2) the peak pressure is set as N1, the separator samples are compressed until the total thickness is d1, and N1 is higher than or equal to the product of 40 kPa and the sample area and lower than or equal to the product of 120 kPa and the sample area; (3) the pressure is removed, and the separator samples recover completely; (4) the separator samples are placed in a sulfuric acid solution or pure water and absorb the sulfuric acid solution or pure water in a saturated manner, and the separator samples are drained and placed into the detection device; (5) the separator samples are compressed again until the total thickness is d1, the pressure is removed, and the separator samples are recovered completely; (6) the step (5) is repeated for multiple times, the pressure when the separator samples are compressed until the total thickness is d1 for the last time is measured and recorded as N2, and the circulating durability of wet-state compression and recovery of the AGM separators is represented by the difference of N1 and N2.

Description

Technical field [0001] The invention relates to the technical field of battery separator detection, and in particular to a method for detecting the durability of AGM separator wet compression recovery cycles. Background technique [0002] A storage battery is a device that directly converts chemical energy into electrical energy. It is recharged through a reversible chemical reaction and is a rechargeable battery. Lead-acid batteries have always had an absolute advantage in chemical power sources due to their low price, easy access to raw materials, safe and reliable use, suitable for high-current discharge and wide ambient temperature range. With the development of lead-acid batteries, higher requirements are put forward on battery performance, especially in terms of high-power and long-life performance requirements. With the continuous advancement of technology, it has been found that the battery assembly pressure is a key factor to ensure a long life, and the performance of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/08H01M2/16H01M50/44
CPCG01N3/08G01N2203/0019H01M50/431H01M50/44Y02E60/10
Inventor 张峰博何英陈飞班涛伟侯国友黄建忠欧阳万忠龙洋洋
Owner TIANNENG BATTERY GROUP