CN209485628U - A kind of fuel battery double plates fast leakage detection apparatus - Google Patents
A kind of fuel battery double plates fast leakage detection apparatus Download PDFInfo
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- CN209485628U CN209485628U CN201920211704.1U CN201920211704U CN209485628U CN 209485628 U CN209485628 U CN 209485628U CN 201920211704 U CN201920211704 U CN 201920211704U CN 209485628 U CN209485628 U CN 209485628U
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- clamp plate
- helium
- cabin
- fuel battery
- bipolar plates
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Abstract
The utility model relates to a kind of fuel battery double plates fast leakage detection apparatus, including helium cabin (3), buffering cabin (4), bipolar plates to be detected are fixed by fixture (1), and seal the cooling fluid inlet and outlet of bipolar plates, cooling fluid import connects Nitrogen source gases (103), cooling fluid outlet connection gas detection equipment (104), the leak case of bipolar plates is judged by the amount of helium that gas detection equipment (104) detects.Compared with prior art, the utility model has many advantages, such as that simple and convenient, high sensitivity, precision are high.
Description
Technical field
The utility model relates to fuel cells, more particularly, to a kind of fuel battery double plates fast leakage detection apparatus.
Background technique
Fuel cell is a kind of device that hydrogen fuel and oxidant can be converted to electric energy and reaction product.The device
Internal core component is bipolar plates sandwiched membrane electrode assembly in the process of running, bipolar plates execute following function to fuel cell pack
To maintain the optimum Working and service life of fuel cell pack: (1) battery conductive body, pole plate two sides are respectively formed cathode
Anode, will one by one battery cells in series to form fuel cell pack；(2) reaction gas (mass transfer) is provided to electrode by runner；
(3) management for coordinating water and heat prevents cooling medium and reaction gas from leaking outside；(4) strong to membrane electrode assembly (MEA) offer structure
Degree is supported.
Pole plate is that quantity is most in the key components and parts and important component and fuel list cell system in fuel list pond
Components.The failure mode of bipolar plates often shows cooling chamber and fuel cavity or leaks with the string of oxidant cavity.This is often
Causing fuel string to leak to cooling chamber causes safety problem or coolant liquid string to be leaked to fuel or oxidant cavity stopped reaction
Person brings high risks to the fuel list pond service life.
Bipolar plates are that have two panels unipolar plate to be formed through being bonded or welded.Failure mechanism mainly includes pole plate leakage, unipolar plate
Between weld or bonding leakage and between bipolar plates and membrane electrode seal line leakage.Method used by revealing is checked at present
For full pressure test and gas collection detection.Briefly, that is, the mode of pile is imitated, realizes that full pole plate is close using seal line respectively
Envelope detects pressure leakage speed using full pressure or collects gas.The greatest problem of this method is required overlong time,
It cannot achieve rapid batch inspection.Meanwhile sealing tree lace used in this method is complex, therefore to sealed pressure stability
It is required that very high, equipment robustness is reduced.
Utility model content
The purpose of this utility model be exactly in order to overcome the problems of the above-mentioned prior art and provide it is a kind of it is simple and convenient,
High sensitivity, fuel battery double plates fast leakage detection apparatus with high accuracy.
The purpose of this utility model can be achieved through the following technical solutions: a kind of fuel battery double plates quick leak-checking
Device, which is characterized in that including helium cabin, buffering cabin, bipolar plates to be detected are fixed by fixture, and seal the cooling of bipolar plates
Fluid inlet and outlet, cooling fluid import connect Nitrogen source gases, and connection gas detection equipment in cooling fluid outlet passes through gas detection
The amount of helium that equipment detects judges the leak case of bipolar plates.
The fixture includes upper clamp plate, sealing element and the lower clamp plate with fastening bolt, upper clamp plate and lower clamp plate both ends
It being equipped with and imports and exports the sealing element to match with the cooling fluid of bipolar plates, bipolar plates are placed on lower clamp plate, then cover upper clamp plate,
And upper clamp plate and lower clamp plate are connected and fixed by bolt, while cooling fluid being imported and exported and is located at bipolar plates by sealing element
Intermediate coolant flow channel sealing.
The lower clamp plate two sides are respectively provided with a groove, fixed in groove one can be rotated bolt, upper clamp plate two sides be equipped with pair
The groove answered, bolt rotation are caught in upper clamp plate respective slot, are fixed by nut, thus by upper clamp plate and the fixed company of lower clamp plate
It connects.
It is equipped with connecting pipe between the helium cabin and buffering cabin, and is equipped with helium valves on the pipeline.
The helium cabin connects helium gas source.
The buffering cabin connects vacuum pump.
The gas detection equipment includes gas-chromatography or mass spectrum.
Using the device to the method for fuel battery double plates quick leak-checking, comprising the following steps:
Fuel battery double plates are clamped by fixture, are then placed in buffering cabin, then buffering cabin is vacuumized；
Open helium gas source and helium valves, make to keep in helium cabin and buffering cabin full of helium in helium cabin pressure and
Pressure balance in surge bunker；
Nitrogen source gases are opened, High Purity Nitrogen is filled with into fixture；
Whether contain helium from the gas of cooling fluid outlet outflow by gas detection equipment detection, so that judgement is double
The leak case of pole plate.
Vacuum degree after surge bunker vacuumizes in step is 350~3500 supports.
Pressure in step in helium storehouse is 50~500KPa.
Compared with prior art, the utility model has the advantage that
(1) the utility model is passed through helium in the atmosphere where pole plate by the cooling water cavity interface of only sealing bipolar plates
Gas forms the pressure difference in environment and cooling duct.It is passed through carrier gas in the cooling channel and enters High Purity Nitrogen etc., detects the helium of outlet
Content, and then complete string leak detection.Detecting tool used in helium includes gas-chromatography, the equipment such as mass spectrum.Gas-chromatography and
Mass spectrometric detection accuracy is very high, is very easy to detect that gas leaks, and the sensitivity of this method and precision are surveyed much higher than full pressure
Method for testing.
(2) bipolar plates coolant liquid entrance is only sealed, seal request is significantly simplified, makes experiment itself only in bipolar
Plate, reducing the accuracy of detection device bring and precision influences.
(3) whole process assembly and testing requirements time are short, can meet the needs of productive temp very well.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of bipolar plates；
Fig. 2 is the structural schematic diagram of the utility model fixture；
Fig. 3 is that the utility model fixture clamps the structural schematic diagram after bipolar plates；
Fig. 4 is that the utility model fixture clamps the side view after double plates；
Fig. 5 is the structural schematic diagram of the utility model leakage detection apparatus；
Fig. 6 is the schematic diagram of the utility model leak hunting method.
Figure label is as follows:
1. fixture, 11 upper clamp plates, 12 sealing elements, 13. lower clamp plates；2. bipolar plates, 21. fuel inlets, 22 cooling fluids into
Mouthful, 23 oxidant inlets, 24 oxidant outlets, the outlet of 25 cooling fluids, 26 fuel outlets；3. helium cabin；4. buffering cabin；5. helium
Air valve；6. bipolar plates seal groove；7. vacuum valve；8. fixture air intake valve；9. fixture outlet valve；10. vacuum pump；101
Helium gas source；102 helium air intake valves；103 Nitrogen source gases；104 gas detection equipments.
Specific embodiment
The utility model is described in detail in the following with reference to the drawings and specific embodiments.
Embodiment 1
As described in Figure 1, a kind of fuel battery double plates 2, are made of anode plate and cathode plate, anode plate and cathode plate sandwiched
Space be coolant flow channel cavity, bipolar board ends be equipped with three into three outlet, be respectively as follows: fuel inlet 21, cooling fluid import
22, oxidant inlet 23, oxidant outlet 24, cooling fluid outlet 25, fuel outlet 26, it is close that bipolar plate surfaces are equipped with bipolar plates
Sealing groove 6.
For the sealing performance for detecting above-mentioned bipolar plates, special fixture 1 is devised, structure is as shown in figures 2-3, including upper
Clamping plate 11, sealing element 12 and the lower clamp plate 13 with fastening bolt, upper clamp plate 11 and 13 both ends of lower clamp plate are equipped with and bipolar plates
Cooling fluid import and export the sealing element 12 that matches, bipolar plates are placed on lower clamp plate 13, and it is recessed that 13 two sides of lower clamp plate are respectively provided with one
Slot, one is fixed in groove can be rotated bolt, and 11 two sides of upper clamp plate are equipped with corresponding groove, lower clamp plate 13 and upper clamp plate 11 is opposite sets
It sets, bolt rotation is caught in 11 respective slot of upper clamp plate, so that upper clamp plate 11 is fixedly connected with lower clamp plate 13, and passes through bolt
Upper clamp plate 11 and lower clamp plate 13 are connected and fixed, while cooling fluid being imported and exported by sealing element 12 and is located among bipolar plates
Coolant flow channel sealing.
When carrying out quick leak-checking, method is following as shown in Fig. 5~6:
1, fuel battery double plates 2 are clamped by fixture 1, is then placed in buffering cabin 4, behind closing buffering cabin, opened
Vacuum valve 7, by vacuum pump 10, it is 700 supports that buffering cabin 4, which is evacuated to vacuum degree,；
2, open helium gas source 101 helium air intake valve 102 be connected to helium cabin 3 and buffering cabin 4 pipeline on helium
Air valve 5 makes helium cabin 3 and buffers in cabin 4 full of helium, keeps pressure in helium cabin 3 and buffers pressure balance in cabin 4；Helium
Pressure in gas cabin 3 is 100KPa；
3, the fixture air intake valve 8 of Nitrogen source gases 103, and the fixture outlet connecting with gas detection equipment 104 are opened
Valve 9 is filled with High Purity Nitrogen into fixture 1, and the existing air of cavity where diluting bipolar plates internal cooling channel completely forms nitrogen
Atmosphere is enclosed, and the fixture outlet valve 9 by opening is expelled to gas detection equipment 104；
4, due to the differential pressure action of nitrogen and extraneous gas in fixture, helium pressure is higher than nitrogen, if bipolar plates leak,
Helium can enter in fixture, to enter gas detection equipment 104 with High Purity Nitrogen, be examined by 104 mass spectrograph of gas detection equipment
It surveys and whether contains helium from the gas of cooling fluid outlet outflow, to judge the leak case of bipolar plates.
Embodiment 2
A kind of fuel battery double plates quick-speed leak detection method, comprising the following steps:
1, fuel battery double plates are clamped by fixture, is then placed in buffering cabin, behind closing buffering cabin, open vacuum
Valve, by vacuum pump, it is 2000 supports that buffering cabin, which is evacuated to vacuum degree,；
2, open helium gas source helium air intake valve be connected to helium cabin and buffering cabin pipeline on helium valves, make
It is full of helium in helium cabin and buffering cabin, keeps pressure and pressure balance in buffering cabin in helium cabin；Pressure in helium cabin is
250KPa；
3, the fixture air intake valve of Nitrogen source gases, and the fixture outlet valve connecting with gas detection equipment are opened, to
High Purity Nitrogen is filled in fixture, the existing air of cavity where diluting bipolar plates internal cooling channel completely forms nitrogen atmosphere, and
Gas detection equipment is expelled to by the fixture outlet valve opened；
4, due to the pressure difference of nitrogen and extraneous gas effect in fixture, helium pressure is higher than nitrogen, if bipolar plates are let out
Leakage, helium can enter in fixture, to enter gas detection equipment with High Purity Nitrogen, by the detection of gas detection equipment mass spectrograph from
Whether contain helium in the gas of cooling fluid outlet outflow, to judge the leak case of bipolar plates.
Embodiment 3
A kind of fuel battery double plates quick-speed leak detection method, comprising the following steps:
1, fuel battery double plates are clamped by fixture, is then placed in buffering cabin, behind closing buffering cabin, open vacuum
Valve, by vacuum pump, it is 3000 supports that buffering cabin, which is evacuated to vacuum degree,；
2, open helium gas source helium air intake valve be connected to helium cabin and buffering cabin pipeline on helium valves, make
It is full of helium in helium cabin and buffering cabin, keeps pressure and pressure balance in buffering cabin in helium cabin；Pressure in helium cabin is
400KPa；
3, the fixture air intake valve of Nitrogen source gases, and the fixture outlet valve connecting with gas detection equipment are opened, to
High Purity Nitrogen is filled in fixture, the existing air of cavity where diluting bipolar plates internal cooling channel completely forms nitrogen atmosphere, and
Gas detection equipment is expelled to by the fixture outlet valve opened；
4, due to the pressure difference of nitrogen and extraneous gas effect in fixture, helium pressure is higher than nitrogen, if bipolar plates are let out
Leakage, helium can enter in fixture, to enter gas detection equipment with High Purity Nitrogen, by the detection of gas detection equipment mass spectrograph from
Whether contain helium in the gas of cooling fluid outlet outflow, to judge the leak case of bipolar plates.
Claims (7)
1. a kind of fuel battery double plates fast leakage detection apparatus, which is characterized in that be checked including helium cabin (3), buffering cabin (4)
It surveys bipolar plates to fix by fixture (1), and seals the cooling fluid inlet and outlet of bipolar plates, cooling fluid import connects Nitrogen source gases
(103), cooling fluid outlet connection gas detection equipment (104), is sentenced by the amount of helium that gas detection equipment (104) detects
The leak case of disconnected bipolar plates.
2. a kind of fuel battery double plates fast leakage detection apparatus according to claim 1, which is characterized in that the fixture
It (1) include upper clamp plate (11), sealing element (12) and the lower clamp plate (13) with fastening bolt, upper clamp plate (11) and lower clamp plate (13)
Both ends, which are equipped with, imports and exports the sealing element (12) to match with the cooling fluid of bipolar plates, and bipolar plates are placed on lower clamp plate (13),
It covers upper clamp plate (11), and is connected and fixed upper clamp plate (11) and lower clamp plate (13) by bolt, while passing through sealing element again
(12) cooling fluid is imported and exported and is sealed with the coolant flow channel being located among bipolar plates.
3. a kind of fuel battery double plates fast leakage detection apparatus according to claim 2, which is characterized in that the lower folder
Plate (13) two sides are respectively provided with a groove, and one is fixed in groove can be rotated bolt, and upper clamp plate (11) two sides are equipped with corresponding groove, spiral shell
Bolt rotation is caught in upper clamp plate (11) respective slot, is fixed by nut, so that upper clamp plate (11) and lower clamp plate (13) is fixed
Connection.
4. a kind of fuel battery double plates fast leakage detection apparatus according to claim 1, which is characterized in that the helium
It is equipped with connecting pipe between cabin (3) and buffering cabin (4), and is equipped with helium valves (5) on the pipeline.
5. a kind of fuel battery double plates fast leakage detection apparatus according to claim 1, which is characterized in that the helium
Cabin (3) connects helium gas source (101).
6. a kind of fuel battery double plates fast leakage detection apparatus according to claim 1, which is characterized in that the buffering
Cabin (4) connects vacuum pump (10).
7. a kind of fuel battery double plates fast leakage detection apparatus according to claim 1, which is characterized in that the gas
Detection device (104) includes gas-chromatography or mass spectrum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920211704.1U CN209485628U (en) | 2019-02-19 | 2019-02-19 | A kind of fuel battery double plates fast leakage detection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920211704.1U CN209485628U (en) | 2019-02-19 | 2019-02-19 | A kind of fuel battery double plates fast leakage detection apparatus |
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| CN209485628U true CN209485628U (en) | 2019-10-11 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109708820A (en) * | 2019-02-19 | 2019-05-03 | 上海神力科技有限公司 | A kind of fuel battery double plates fast leakage detection apparatus and method |
| WO2021103174A1 (en) * | 2019-11-27 | 2021-06-03 | 浙江嘉杰汽车设计有限公司 | Clamp for detecting density performance of fuel cell bipolar plate |
-
2019
- 2019-02-19 CN CN201920211704.1U patent/CN209485628U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109708820A (en) * | 2019-02-19 | 2019-05-03 | 上海神力科技有限公司 | A kind of fuel battery double plates fast leakage detection apparatus and method |
| WO2021103174A1 (en) * | 2019-11-27 | 2021-06-03 | 浙江嘉杰汽车设计有限公司 | Clamp for detecting density performance of fuel cell bipolar plate |
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