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Method for testing airtightness of bipolar plate material and special clamp therefor

A test method and technology of bipolar plates, which are used in liquid/vacuum measurement for liquid tightness, and by measuring the acceleration and deceleration rates of fluids. Problems such as poor sex, to achieve the effect of convenient testing, objective and accurate comparison, and convenient testing

Inactive Publication Date: 2006-07-19
南京博能燃料电池有限责任公司
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] (1) If it is found that the bipolar plate cannot be used due to the poor air tightness caused by the bipolar plate material, all the produced bipolar plates cannot be used, and the loss is relatively large and cannot be remedied
[0008] (2) The stack assembled from bipolar plates tested under a certain gas pressure cannot guarantee good airtightness under another different gas pressure

Method used

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  • Method for testing airtightness of bipolar plate material and special clamp therefor

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Effect test

Embodiment 1

[0021] Embodiment 1: a kind of testing method of the airtightness of bipolar plate material, this method comprises the following steps:

[0022] (1) Use the bipolar plate material to be tested to make the same batch of flat plates with a circular shape and a thickness of 5mm;

[0023] (2) Prepare a pair of fixtures according to the structural shape of the plate, and the side of the fixture corresponding to the plate is provided with an air flow channel, and the other side is provided with a test channel;

[0024] (3) Use a clamp to clamp the flat plate;

[0025] (4) Inject air with a pressure of 0.2MPa into the airflow channel of the fixture;

[0026] (5) Use a gas flow meter to measure the flow rate of the escaping gas in the test channel of the fixture, and determine the airtight performance of the bipolar plate material according to the difference in flow rate.

Embodiment 2

[0027] Embodiment 2: a kind of testing method of bipolar plate material airtightness, this method comprises the following steps:

[0028] (1) Use the bipolar plate material to be tested to make the same batch of flat plates with a quadrilateral shape and a thickness of 8 mm;

[0029] (2) Prepare a pair of fixtures according to the structural shape of the plate, and the side of the fixture corresponding to the plate is provided with an air flow channel, and the other side is provided with a test channel;

[0030] (3) Use a clamp to clamp the flat plate;

[0031] (4) Inject nitrogen with a pressure of 0.4 MPa into the air flow channel of the fixture;

[0032] (5) Use a gas flow meter to measure the flow rate of the escaping gas in the test channel of the fixture, and determine the airtight performance of the bipolar plate material according to the difference in flow rate.

[0033] In order to realize above-mentioned testing method, the present invention also provides a kind of...

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Abstract

The invention discloses a method for measuring the double-polar plate material air impermeability and its special holder. It first uses tested double-polar plate material to form the plate with different sharp and size; then it prepares for a pair of holder by the structure sharp of the plate, one side of the corresponding plate arranges an air channel and the other side arranges a test channel; it uses the holder to hold the plate; it pitches the test gas with the pressure range 0.01-0.5MPa to the air channel of the holder; it uses gas flow indicator to measure the flow speed of the emergent gas in the test channel.

Description

1. Technical field [0001] The invention relates to a method for testing the airtightness of materials, in particular to a method for testing the airtightness of a bipolar plate material of a proton exchange membrane fuel cell. In addition, the invention also relates to a special fixture used in the method. 2. Background technology [0002] A proton exchange membrane fuel cell is a device that generates electricity through the electrochemical reaction of fuel and oxidant. The core component of the device is the membrane electrode (Membrane Electrode Assembly, referred to as MEA), which consists of two porous conductive materials and a piece of proton exchange membrane sandwiched between them. An electrochemical catalyst is attached on the interface of the proton exchange membrane and the conductive material (such as carbon paper). Another important component of a proton exchange membrane fuel cell is the bipolar plate. The bipolar plates contain channels through which gases...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/26
Inventor 乔永庆沈建跃曲平康新
Owner 南京博能燃料电池有限责任公司
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