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Rapid leak detection device of bipolar plate of fuel cell and method thereof

A fuel cell, bipolar plate technology, applied in the direction of detecting the appearance of fluid at the leak point, using liquid/vacuum for liquid tightness measurement, etc., can solve the problem of reduced equipment robustness, long time, and complex sealant lines and other problems to achieve the effect of reducing the impact of accuracy and precision, meeting the needs of production takt, and simplifying sealing requirements

Pending Publication Date: 2019-05-03
SHANGHAI SHENLI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biggest problem with this method is that it takes too long to achieve fast batch inspection
At the same time, the sealing glue line used in this method is relatively complicated, so the requirements for sealing pressure stability are very high, and the robustness of the equipment is reduced

Method used

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  • Rapid leak detection device of bipolar plate of fuel cell and method thereof
  • Rapid leak detection device of bipolar plate of fuel cell and method thereof
  • Rapid leak detection device of bipolar plate of fuel cell and method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Such as figure 1 As described above, a fuel cell bipolar plate 2 is composed of an anode plate and a cathode plate. The space between the anode plate and the cathode plate is a cooling channel cavity. Two ends of the bipolar plate are provided with three inlets and three outlets, which are respectively: Fuel inlet 21, cooling fluid inlet 22, oxidant inlet 23, oxidant outlet 24, cooling fluid outlet 25, fuel outlet 26, bipolar plate sealing groove 6 is provided on the surface of the bipolar plate.

[0035] In order to test the sealing performance of the above-mentioned bipolar plate, a special fixture 1 is designed, and its structure is as follows: Figure 2~3 As shown, it includes an upper splint 11, a seal 12 and a lower splint 13 with fastening bolts. Both ends of the upper splint 11 and the lower splint 13 are provided with seals 12 that match the cooling fluid inlet and outlet of the bipolar plate. The bipolar plate is placed on the lower splint 13, a groove is pro...

Embodiment 2

[0042] A fast leak detection method for a fuel cell bipolar plate, comprising the following steps:

[0043] 1. Fix the fuel cell bipolar plate through the fixture, and then put it into the buffer cabin. After closing the buffer cabin, open the vacuum valve, and use the vacuum pump to evacuate the buffer cabin to a vacuum degree of 2000 Torr;

[0044] 2. Open the helium inlet valve of the helium gas source and the helium valve on the pipeline connecting the helium chamber and the buffer chamber, so that the helium chamber and the buffer chamber are filled with helium to keep the pressure in the helium chamber and the buffer chamber Internal pressure balance; the pressure in the helium chamber is 250KPa;

[0045] 3. Open the fixture inlet valve of the nitrogen gas source and the fixture outlet valve connected with the gas detection equipment, fill the fixture with high-purity nitrogen, completely dilute the existing air in the cavity where the cooling channel inside the bipolar ...

Embodiment 3

[0048] A fast leak detection method for a fuel cell bipolar plate, comprising the following steps:

[0049]1. Fix the bipolar plate of the fuel cell through the fixture, and then put it into the buffer cabin. After closing the buffer cabin, open the vacuum valve, and use the vacuum pump to evacuate the buffer cabin to a vacuum degree of 3000 Torr;

[0050] 2. Open the helium inlet valve of the helium gas source and the helium valve on the pipeline connecting the helium chamber and the buffer chamber, so that the helium chamber and the buffer chamber are filled with helium to keep the pressure in the helium chamber and the buffer chamber Internal pressure balance; the pressure in the helium chamber is 400KPa;

[0051] 3. Open the fixture inlet valve of the nitrogen gas source and the fixture outlet valve connected with the gas detection equipment, fill the fixture with high-purity nitrogen, completely dilute the existing air in the cavity where the cooling channel inside the bi...

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Abstract

The invention relates to a rapid leak detection device of a bipolar plate of a fuel cell and a method thereof. The device comprises a helium gas chamber (3) and a buffer chamber (4). A to-be-detectedbipolar plate is fixed by a clamp (1). A cooling fluid inlet and a cooling fluid outlet of the bipolar plate are sealed; the cooling fluid inlet is connected to a nitrogen gas source (103); and the cooling fluid outlet is connected to a gas detecting device (104). A leak situation of the bipolar plate is determined based on the helium gas amount detected by the gas detecting device (104). Comparedwith the prior art, the device has advantages of high simplicity, great convenience, high sensitivity and high precision.

Description

technical field [0001] The invention relates to a fuel cell, in particular to a fast leak detection device and method for a bipolar plate of a fuel cell. Background technique [0002] A fuel cell is a device that converts hydrogen fuel and oxidant into electrical energy and reaction products. The internal core component of the device is composed of bipolar plates sandwiched with membrane electrodes. During the operation of the fuel cell stack, the bipolar plates perform the following functions to maintain the best working condition and service life of the fuel cell stack: (1) battery conductor , the cathode and anode are respectively formed on both sides of the plate, and the battery cells are connected in series to form a fuel cell stack; (2) provide reactant gas (mass transfer) to the electrode through the flow channel; (3) coordinate the management of water and heat to prevent cooling Leakage of medium and reaction gas; (4) Provide structural strength support to the memb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/20
Inventor 周斌甘全全李丽戴威杨曲
Owner SHANGHAI SHENLI TECH CO LTD
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