Method and system for detecting near-surface cracks of bipolar plate made of graphite

A detection system and bipolar plate technology, applied in the direction of material magnetic variables, etc., can solve problems such as transverse cracking of graphite plate products, and achieve the effect of complete functions, ensuring universality, and improving the requirements of various performance indicators.

Pending Publication Date: 2022-07-29
CHINA JILIANG UNIV
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  • Abstract
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AI Technical Summary

Problems solved by technology

If the position of the receiving table is improper, the graphite plate will bend and sag too much after being pressed out, which will also cause the product to crack
[0004] So far, there is not a complete set of methods and systems for detecting cracks in graphite bipolar plates in China, which urgently requires the metrology department to carry out relevant research

Method used

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  • Method and system for detecting near-surface cracks of bipolar plate made of graphite
  • Method and system for detecting near-surface cracks of bipolar plate made of graphite
  • Method and system for detecting near-surface cracks of bipolar plate made of graphite

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Experimental program
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specific Embodiment

[0023] 1) First install the eddy current sensor 1-1 and fix it on the support rod 1-2. Select a graphite plate of a certain specification and the corresponding graphite plate placement device 1-3, and fix it on the connection structure 2-2 by screws.

[0024] 2) Before the measurement work, it is first necessary to match the physical space coordinates with the coordinates of the positioning result of the host computer program interface. Input the length Y width X of the graphite plate and the installation height Z of the eddy current sensor to the upper computer, and the upper computer system will automatically match the graphite plate displacement algorithm according to the position conversion, so as to realize the matching between the coordinates of the system output graphite plate and its physical space position coordinates .

[0025] 3) Click the detection button on the upper computer of the computer, the system starts to run, the eddy current sensor is stationary, and th...

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PUM

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Abstract

The invention relates to a graphite bipolar plate near surface crack detection method and system, the detection system comprises an eddy current sensor, a support rod, a graphite bipolar plate placing groove, a transmission device, a signal generation acquisition analysis system and a computer, and the detection system is characterized in that the eddy current sensor is fixedly installed on the support rod; the transmission device is erected on the graphite electrode plate containing groove and used for controlling movement of the graphite electrode plate containing groove, the size of the graphite bipolar plate containing groove is adjusted to be suitable for bipolar plates of various specifications, and the signal generating, collecting and analyzing system is divided into a power module and a data collecting and analyzing module. And the data acquisition and analysis module is used for acquiring and analyzing the defect damage of the near surface of the graphite electrode. By means of the system, cracks of various sizes generated in the production process of the graphite bipolar plate can be detected.

Description

technical field [0001] The invention relates to the field of non-destructive testing, in particular to a method and system for detecting near-surface cracks in a bipolar plate made of graphite. Background technique [0002] As an efficient and environmentally friendly power generation device, fuel cells have broad application prospects in base station power sources, small and medium-sized power stations, electric vehicles, backup power sources, and portable power sources. Fuel cells can be divided into proton exchange membrane fuel cells, direct methanol fuel cells, alkaline fuel cells, solid oxide fuel cells, molten salt fuel cells, microbial fuel cells, biofuel cells, and the like. The material battery is mainly composed of end plates, collector plates, bipolar plates, membrane electrodes, etc. The bipolar plate is the support part of the fuel cell, which mainly plays the role of supporting, distributing the guiding gas, isolating the gas and collecting current. At presen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/90
CPCG01N27/9046
Inventor 唐佳玄
Owner CHINA JILIANG UNIV
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