Hydrogen leakage in-situ detection method for hydrogen fuel cell system

A fuel cell system, in-situ detection technology, applied in the direction of detecting the appearance of fluid at the leakage point, using liquid/vacuum degree for liquid tightness measurement, etc., can solve problems such as potential safety hazards and fuel cell performance degradation, and achieve improvement The effect of rescue speed and high promotional value

Pending Publication Date: 2022-01-25
BEIJING INST OF AEROSPACE TESTING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Leakage of hydrogen will lead to a decline in the performance of the fuel cell. At the same time, hydrogen is a combustible gas, and excessive accumulation will bring greater safety hazards.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Clean the inlet and outlet of the hydrogen storage tank, fuel reactor pipe joints, and welds in the hydrogen fuel cell vehicle, cut the required length of hydrogen leak detection tape, stretch it properly, and keep the appropriate elasticity for sequential lapping Winding, press hard for 2-3 seconds until the contact surface of the body is completely bonded without gaps.

[0014] After using it for a period of time, the hydrogen concentration detection alarm in the car indicated that there was a leak. After turning on the hydrogen fuel cell system, it was found that the tape pasted on the weld of a certain pipeline turned light blue. After inspection, it was confirmed that there was a slight leak.

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PUM

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Abstract

The invention relates to a hydrogen leakage in-situ detection method for a hydrogen fuel cell system, in particular to a hydrogen leakage in-situ detection method in a color-changing adhesive tape form. Potential hydrogen leakage positions such as a hydrogen circulation system, a hydrogen storage system, a pressure detection device and pipeline joints, valves, flanges and weld joints of various sensors in a hydrogen fuel cell system are coated with an adhesive tape, whether leakage occurs or not is judged by observing whether the color of the adhesive tape changes or not, and the specific position of a leakage point is determined.

Description

technical field [0001] The invention relates to an in-situ detection method for hydrogen leakage used in a hydrogen fuel cell system, in particular to an in-situ detection method for hydrogen leakage in the form of a color-changing adhesive tape. Background technique [0002] Based on its carbon-free, wide-ranging and renewable advantages, hydrogen energy is gradually rising in the global energy architecture. In the production, storage and application of hydrogen fuel cells, there is a certain risk of hydrogen leakage. Leakage of hydrogen will lead to a decline in the performance of the fuel cell. At the same time, hydrogen is a combustible gas, and excessive accumulation will bring greater safety hazards. Therefore, the development and application of leak detection methods with in-situ real-time monitoring and instant location of leak points has become an urgent problem to be solved in the safe use of hydrogen fuel cell systems. Contents of the invention [0003] The te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/20
CPCG01M3/20
Inventor 孟醒徐林楠李俊钟秋赵坦毛亚南张旭贾月方涛
Owner BEIJING INST OF AEROSPACE TESTING TECH
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