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Fuel cell pole bipolar plate leakage detection method

A fuel cell and bipolar plate technology, applied in the direction of detecting the appearance of fluid at the leak point, using liquid/vacuum degree for liquid tightness measurement, etc., can solve the problems of screening results, etc., and achieve the effect of simple equipment

Pending Publication Date: 2021-02-26
SHANGHAI SHENLI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has high requirements for detection instruments, and when the leakage of the bipolar plate is large or small, it will affect the screening results

Method used

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  • Fuel cell pole bipolar plate leakage detection method
  • Fuel cell pole bipolar plate leakage detection method
  • Fuel cell pole bipolar plate leakage detection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A fuel cell pole bipolar plate leak detection method, the detection device and reagents include: fuel cell assembly tooling, that is, detection tooling, ultraviolet lamps, detection liquid (water-soluble fluorescent tracer)

[0028] The detection tooling structure is as follows figure 1 As shown, it includes a seal 2, an upper end plate 3, a lower end plate 5, and a pull rod 6. The bipolar plate 1 to be tested is arranged between the upper end plate 3 and the lower end plate 5, and is fixed by the pull rod 6. The upper end plate 3 is provided with a cooling Liquid inlet 4 and coolant outlet 7. The bipolar plate 1 includes a front anode plate, a back cathode plate, and a cooling cavity in the middle; the seal 2 includes a seal a that seals the cooling cavity of the bipolar plate, and the bipolar plate 1 and the upper end plate 3 , The seal b between the lower end plate 5. The cooling liquid inlet and outlet of the bipolar plate cooling cavity communicate with the cooli...

Embodiment 2

[0038] The detection solution is to use coumarin derivatives as a water-soluble fluorescent tracer, which is dissolved in deionized water to prepare a detection solution with a concentration of 200ppm. The detection pressure is 20KPa, and it is allowed to stand for 7 days. The rest are the same as in Example 1.

Embodiment 3

[0040] The detection solution is the ketone disodium salt of xanthene ring as a water-soluble fluorescent tracer, which is dissolved in deionized water to prepare a detection solution with a concentration of 2000ppm. The detection pressure is 200KPa, and it is left to stand for 7 days, and the rest is implemented in the same way. example 1.

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PUM

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Abstract

The invention relates to a fuel cell pole bipolar plate leakage detection method, which comprises the following steps of sealing a bipolar plate (1) to be detected in a detection tool, arranging a detection liquid inlet and outlet on the detection tool, communicating the detection liquid inlet and outlet with a cooling cavity of the bipolar plate (1), inputting a detection liquid containing a fluorescent agent into the cooling cavity through the detection liquid inlet and outlet, pressurizing to 20-200kPa, and standing for 0.5-7 days, and disassembling the bipolar plate, and placing the disassembled bipolar plate under an ultraviolet lamp, wherein the area with fluorescence reaction is the leakage point area of the bipolar plate. Compared with the prior art, the method has the advantages of sensitive detection, simplicity, convenience and the like.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to a leak detection method for fuel cell bipolar plates. Background technique [0002] A fuel cell is a device that directly converts chemical energy in fuel and oxidant into electrical energy and heat energy. It has the advantages of high energy conversion efficiency, environmental protection, no pollution, and low noise. Proton exchange membrane fuel cells are mainly composed of bipolar plates, membrane electrodes, sealing structures and other components. The main functions of the bipolar plate in the fuel cell are: (1) to separate the reaction gas and coolant inside the fuel cell stack; (2) to coordinate the internal water and heat management of the stack, and to guide the gas distribution and transportation; (3) to provide Membrane electrodes provide strength support. The bipolar plate is the most numerous component in the fuel cell stack and is an important part of the fuel cell sta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/20
CPCG01M3/20
Inventor 朱从懿胡正坤李丽甘全全戴威
Owner SHANGHAI SHENLI TECH CO LTD
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