CN210464833U - Novel fuel cell pressure maintaining experiment bench - Google Patents
Novel fuel cell pressure maintaining experiment bench Download PDFInfo
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- CN210464833U CN210464833U CN201921334415.7U CN201921334415U CN210464833U CN 210464833 U CN210464833 U CN 210464833U CN 201921334415 U CN201921334415 U CN 201921334415U CN 210464833 U CN210464833 U CN 210464833U
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Abstract
The utility model discloses a novel fuel cell pressurize experiment rack belongs to fuel cell technical field, mainly is applied to the detection to fuel cell pile gas tightness, include: the mobile support frame is arranged on a test panel at the top of the mobile support frame, a gas cylinder is fixedly arranged in the mobile support frame, and a gas pressure conversion device is arranged at a gas supply port of the gas cylinder; and communicating the fuel cell stack with the test panel, and detecting the air tightness of the fuel cell stack by the test panel through the air supply of the air bottle and the action of the gas pressure converter. The utility model discloses with gas cylinder, test panel, the integrated integration of experiment platform, solved loaded down with trivial details tube coupling problem in the testing process, this test panel has solved constantly dismantlement adapter and the leakage problem that brings simultaneously, makes fuel cell pile pressurize test more accurate.
Description
Technical Field
The utility model relates to a novel fuel cell pressurize experiment rack belongs to fuel cell technical field, mainly is applied to the detection to fuel cell pile gas tightness.
Background
With the explosive development of the automobile hydrogen fuel cell industry, the demand of the corresponding fuel cell stack is increasing continuously. The air tightness of the fuel cell stack has a great influence on the performance of the fuel cell, so that the air tightness of the fuel cell stack needs to be detected in the production process of the fuel cell stack.
The sealing is critical to ensure that the fuels in the fuel cell do not mix with each other. If the seal is not good, two situations may arise:
1. the mixing of the fuel gases in the chambers may cause explosions and be extremely destructive.
2. The gas in the fuel cell is leaked outside the fuel cell, the efficiency of the fuel cell is reduced, meanwhile, great economic loss is caused, and when the concentration of the fuel gas in the outside is accumulated to a certain degree, explosion can also occur. Therefore, the detection of the sealability of the fuel cell is particularly important.
SUMMERY OF THE UTILITY MODEL
In view of the above problem, the utility model discloses a main aim at provides a novel fuel cell pressurize experiment rack, the utility model discloses with gas cylinder, test panel, the integrated integration of experiment platform, solved loaded down with trivial details pipe connection problem in the test procedure, this test panel has solved constantly dismantling the adapter and the leakage problem that brings simultaneously, makes the fuel cell pile pressurize test more accurate. The design of integration makes the engineer lighter when operating again, can effectively improve work efficiency and economic benefits, simplifies gas tightness detection operation greatly to its mobility makes the laboratory space more nimble.
The pressure holding test is an experimental method in which a gas such as air (or nitrogen) is pressed into a container and the presence or absence of leakage is checked by using the pressure difference between the gas inside and outside the container. For the experiment to fuel cell pile gas tightness, the utility model provides a novel fuel cell pressurize experiment rack, include:
the mobile support frame is arranged on a test panel at the top of the mobile support frame, a gas cylinder is fixedly arranged in the mobile support frame, and a gas pressure conversion device is arranged at a gas supply port of the gas cylinder;
and communicating the fuel cell stack with the test panel, and detecting the air tightness of the fuel cell stack by the test panel through the air supply of the air bottle and the action of the gas pressure converter.
Among this technical scheme, the gas cylinder provides the testing gas, through the decompression of gas pressure conversion equipment, by gas supply port and the pipeline conveying gas who connects to the test panel, experiments.
During testing, the gas cylinder is fixed with the experiment bench, the testing fuel cell is electrically stacked on the experiment bench, and gas in the gas cylinder is connected to the testing panel through a gas pipeline.
The utility model discloses with gas cylinder, test panel, the integrated integration of experiment platform, solved loaded down with trivial details tube coupling problem in the testing process, this test panel has solved the leakage problem that the adapter brought constantly of dismantling simultaneously, makes fuel cell pile pressurize test more accurate. The integrated design makes engineers easier in operation, and the mobility thereof can make the experimental space more flexible.
Preferably, the test panel comprises:
the air inlet of the pressure regulating valve is communicated with the air supply port, and the air outlet of the exhaust hand valve is communicated with the exhaust port;
the branch pipeline is communicated with the main pipeline through a tee joint and is positioned between the air inlet hand valve and the air outlet hand valve;
the branch pipeline is sequentially communicated with a three-way hand valve, a pressure gauge and a gas adapter, and the gas adapter is communicated with a to-be-detected cavity of the fuel cell stack;
the three-way hand valve is also communicated with a flowmeter.
Further, preferably, a plurality of branch pipelines are arranged in parallel on the main pipeline.
The technical scheme is that a plurality of branch pipelines are arranged, preferably 3 branch pipelines are arranged, three branch pipelines can be respectively communicated with an air pipeline, a hydrogen pipeline and a water heating pipeline through a gas adapter, namely the three branch pipelines are respectively used for detecting the sealing performance of three cavities of air, hydrogen and cooling liquid of the fuel cell stack, and the three branch pipelines are completely the same and can be exchanged for use according to the conditions.
Before testing, the air inlet of a cavity of the fuel cell stack to be tested is communicated with the gas conversion joint through a corresponding pipeline, and the air outlet of the cavity is blocked by a plug.
When air is fed, the pressure regulating valve and the hand valve are opened, and the exhaust hand valve is closed. The testing mode of the three-way hand valve can be switched, when the three-way hand valve closes a branch below the three-way hand valve, the pressure meter and the gas adapter are communicated, the flow meter passage is closed, and pressure maintaining testing gas enters the fuel cell stack.
After the air inlet is finished, the upper branch passage is closed by the three-way hand valve, namely, when the pressure meter and the gas adapter and the flow meter are communicated, the upper branch passage is in a leaked gas collection mode and is used for detecting the double-cavity gas channeling condition. If the cavity a of the fuel cell stack is ventilated and gas leaks to the cavity b, a flow meter can be connected to the gas outlet of the cavity b to detect the leakage rate, and the leakage rate is also used for detecting the blow-by rate of the cavity a and the cavity b to the third cavity. If the numerical value on the pressure gauge is obviously reduced, the fuel cell stack has serious leakage condition, and the method is used for detecting the single-cavity air tightness.
When the three-way hand valve is adjusted to be communicated with the branch passage and the pressure meter and the gas adapter, the main branch hand valve is closed, and the upper hand valve of the exhaust port can be opened to exhaust and reduce pressure.
Before the test panel is used, leak detection liquid is needed to determine the air tightness of the pipeline.
The utility model discloses well pressurize test gas is behind the air-vent valve, through the gaseous entering of hand valve control, pressure sensor and display panel real-time supervision main road pressure, and main road pressure sensor monitors simultaneously with the branch road manometer, has avoided making the too big damage that causes of fuel cell pile inlet pressure because of single table breaks down. Meanwhile, the display panel is made of stainless steel materials and provided with an anti-corrosion film, and the pipeline is made of 3/8 stainless steel pipes, so that the whole device is stable in operation and durable.
Further, preferably, the test panel further comprises an automated test improvement scheme:
the main pipeline is sequentially communicated with a pressure regulating valve, an air inlet electromagnetic valve and an air outlet electromagnetic valve, an air inlet of the pressure regulating valve is communicated with the air supply port, and an air outlet of the air outlet electromagnetic valve is communicated with the air outlet;
the branch pipeline is communicated with the main pipeline through a tee joint and is positioned between the air inlet electromagnetic valve and the air outlet electromagnetic valve;
the branch pipeline is sequentially communicated with a three-way electromagnetic valve, a pressure sensor and a gas adapter, and the gas adapter is communicated with a to-be-detected cavity of the fuel cell stack;
the three-way electromagnetic valve is also communicated with a flowmeter;
the main pipeline is connected with a plurality of branch pipelines in parallel.
In the technical scheme, all pressure gauges are replaced by pressure sensors, and data are collected through a computer; all the hand valves can be replaced by electromagnetic valves, and an automatic control process is realized through a controller. The complicated operation steps of operators are saved, the instrument can detect the parameters of gas such as flow, pressure and the like in real time, and the stable operation of the detection process is ensured.
Preferably, an experiment bench power supply is arranged on the movable support frame and is communicated with the display and the pressure sensor.
In this technical scheme, the universal wheel is the silence universal wheel. The device is not only fast and silent in movement, but also does not generate noise in the moving process. The universal wheel makes the experiment rack have the mobility to from taking the power, can accomplish to follow the usefulness and survey, make the experimental space more nimble.
Preferably, the air supply port is plural for simultaneously detecting plural fuel cell stacks, and is generally provided in two.
Preferably, the end of the movable support frame is provided with a writing board, so that a computer or a notebook can be conveniently placed, and an operator can directly record on the experiment platform. Be provided with the movable support on the portable braced frame, the movable support is used for supporting the test panel can dismantle as required at will and remove the test panel about with at the experiment operation in-process, and the operating personnel of being convenient for directly carries out experimental operation on the experiment rack.
Preferably, the movable support frame is a hollow structure.
In this technical scheme, because the gas-liquid interface of most of fuel cell galvanic piles at present all sets up in the fuel cell galvanic pile below, so make the experiment platform fretwork, can make the interface stretch out the platform, be connected through the pipeline with the test panel again, this setting still is convenient for operating personnel controlling means's removal simultaneously, need not to add the handle again, makes the device more succinct.
Preferably, the movable support frame body is provided with a storage space.
Preferably, the bottom of the movable supporting frame is provided with universal wheels.
In this embodiment, the universal wheel is a silent universal wheel. The device is not only fast and silent in movement, but also does not generate noise in the moving process. The universal wheel makes the experiment rack have the mobility to from taking the power, can accomplish to follow the usefulness and survey, make the experimental space more nimble.
The utility model provides a pair of novel fuel cell pressurize experiment rack can bring following at least one beneficial effect:
1. the utility model discloses with gas cylinder, test panel, the integrated integration of experiment platform, solved loaded down with trivial details tube coupling problem in the testing process, this test panel has solved constantly dismantlement adapter and the leakage problem that brings simultaneously, makes fuel cell pile pressurize test more accurate. The design of integration makes the engineer lighter when operating again, can effectively improve work efficiency and economic benefits, simplifies gas tightness detection operation greatly to its mobility makes the laboratory space more nimble.
2. The utility model discloses the whole light in weight of laboratory bench, its self also can the exclusive use for bear other equipment.
3. The utility model discloses well pressurize test gas is behind the air-vent valve, through the gaseous entering of hand valve control, pressure sensor and display panel real-time supervision main road pressure, and main road pressure sensor monitors simultaneously with the branch road manometer, has avoided making the too big damage that causes of fuel cell pile inlet pressure because of single table breaks down. Meanwhile, the display panel is made of stainless steel materials and provided with an anti-corrosion film, and the pipeline is made of 3/8 stainless steel pipes, so that the whole device is stable in operation and durable.
Drawings
The above features, technical features, advantages and implementation of the novel fuel cell pressure maintaining experimental bench of the present invention will be further described in detail in the following description of preferred embodiments in an explicit and understandable manner with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of a novel fuel cell pressure maintaining experiment bench of the present invention;
FIG. 2 is a schematic view of the air tightness test of the test panel;
FIG. 3 is a schematic view of the air tightness detection process by replacing all the hand valves in the test panel with solenoid valves;
reference numerals:
1. the device comprises a test panel 2, a movable support 3, a movable support frame 4, a storage space 5, a writing board 6, an experiment table power supply 7, a gas pressure conversion device 8, a gas supply port 9, a universal wheel 10, a gas cylinder 11, a pressure regulating valve 12, an air inlet hand valve 13, a pressure sensor 14, a display panel 15, a gas adapter 16, a pressure gauge 17, a flow meter 18, a three-way hand valve 19, an air outlet hand valve 20, a three-way valve 21, a fuel cell stack 22, a plug 23, an air pipeline 24, a hydrogen pipeline 25, a water heating pipeline 26, an air inlet electromagnetic valve 27, a three-way electromagnetic valve 28, an air outlet electromagnetic valve 29 and an.
Detailed Description
In order to more clearly illustrate embodiments of the present invention or technical solutions in the prior art, specific embodiments of the present invention will be described below with reference to the accompanying drawings. It is obvious that the drawings in the following description are only examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be obtained from these drawings without inventive effort.
For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure of the product.
Example 1
As shown in fig. 1, the utility model provides a novel fuel cell pressurize experiment rack, include:
the device comprises a movable supporting frame 3 and a test panel 1 arranged at the top of the movable supporting frame 3, wherein a gas cylinder 10 is fixedly arranged in the movable supporting frame 3, and a gas pressure conversion device 7 is arranged at a gas supply port 8 of the gas cylinder 10;
the fuel cell stack 21 is communicated with the test panel 1, and the test panel 1 detects the airtightness of the fuel cell stack 21 by the supply of the gas cylinder 10 and the action of the gas pressure converter.
In this embodiment, the gas bottle 10 supplies the detection gas, the pressure is reduced by the gas pressure conversion device 7, and the gas is supplied to the test panel 1 through the gas supply port 8 and the pipeline connected thereto, so that the experiment is performed.
During testing, the gas cylinder 10 is fixed on a test bench, the test fuel cell stack 21 is placed on the test bench, and the gas in the gas cylinder 10 is connected to the test panel 1 through a gas pipeline.
The utility model discloses with gas cylinder 10, test panel 1, the integrated integration of experiment platform, solved loaded down with trivial details tube coupling problem in the testing process, this test panel 1 has solved the leakage problem that constantly dismantles the adapter and bring simultaneously, makes the 21 pressurize tests of fuel cell pile more accurate. The integrated design makes engineers easier in operation, and the mobility thereof can make the experimental space more flexible.
Example 2
As shown in fig. 2, the present embodiment is an apparatus for testing a panel 1, including:
a main pipeline, which is sequentially communicated with a pressure regulating valve 11, an air inlet hand valve 12 and an air outlet hand valve 19, wherein the air inlet of the pressure regulating valve 11 is communicated with the air inlet 8, and the air outlet of the air outlet hand valve 19 is communicated with the air outlet 29;
the branch pipeline is communicated with the main pipeline through a tee joint 20 and is positioned between the air inlet hand valve 12 and the air outlet hand valve 19;
the branch pipeline is sequentially communicated with a three-way hand valve 18, a pressure gauge 16 and a gas adapter 15, and the gas adapter 15 is communicated with a to-be-detected cavity of a fuel cell stack 21;
the three-way hand valve 18 is also in communication with the flow meter 17.
Specifically, a plurality of branch pipelines are connected in parallel on the main pipeline.
As shown in fig. 2, the utility model discloses be provided with three branch pipeline, can communicate with air pipeline 23, hydrogen pipeline 24, hydrogen pipeline 25 respectively through gas adapter 15, carry out the detection of leakproofness to three chambers of fuel cell pile 21 air, hydrogen, coolant liquid respectively promptly, three branches are identical, but the visual condition exchanges the use.
In this embodiment, before testing, the air inlet of a cavity of the fuel cell stack 21 to be tested is communicated with the gas adapter through a corresponding pipeline, and the air outlet of the cavity is blocked by the plug 22.
During air intake, the pressure regulating valve 11 and the hand valve are opened, and the exhaust hand valve 19 is closed. The testing mode of the three-way hand valve 18 can be switched, when the three-way hand valve 18 closes a branch below the three-way hand valve, the pressure gauge 16 and the gas adapter 15 are communicated, a flow meter 17 passage is closed, and pressure maintaining testing gas enters the fuel cell stack 21.
After air inlet is finished, the upper branch passage is closed by the three-way hand valve 18, namely when the passages are communicated with the pressure gauge 16, the gas adapter 15 and the flowmeter 17, the leakage gas collection mode is used for detecting the double-cavity gas channeling condition. If the cavity a of the fuel cell stack 21 is ventilated and gas leaks to the cavity b, a flow meter 17 can be connected to the gas outlet of the cavity b to detect the leakage rate, and the leakage rate can also be detected when the cavity a and the cavity b blow by gas to the third cavity. If the value on the pressure gauge 16 is obviously reduced, the leakage of the fuel cell stack 21 is serious, and the leakage is used for detecting the airtightness of the single cavity.
When the three-way hand valve 18 is adjusted to be communicated with the branch passage, the pressure gauge 16 and the gas adapter 15, and simultaneously the main passage hand valve is closed, the exhaust hand valve 19 on the exhaust port 29 can be opened for exhausting and decompressing.
Before the test panel 1 is used, leak detection liquid is needed to determine the air tightness of the pipeline.
The utility model discloses well pressurize test gas is behind air-vent valve 11, through the gaseous entering of hand valve control, pressure sensor 13 and 14 real-time supervision main road pressures of display panel, and main road pressure sensor 13 monitors simultaneously with branch road manometer 16, has avoided making the too big damage that causes of fuel cell pile 21 admission pressure because of single table breaks down. Meanwhile, the display panel 14 is made of stainless steel and provided with an anti-corrosion film, and the pipeline is made of 3/8 stainless steel pipes, so that the whole device is more stable in operation and more durable.
Example 3
As shown in fig. 3, this embodiment is refined on the basis of embodiment 2, and the test panel 1 further includes an automated test improvement scheme:
a main pipeline, which is sequentially communicated with a pressure regulating valve 11, an air inlet electromagnetic valve 26 and an air outlet electromagnetic valve 28, wherein the air inlet of the pressure regulating valve 11 is communicated with the air inlet 8, and the air outlet of the air outlet electromagnetic valve 28 is communicated with the air outlet 29;
a branch pipeline which is communicated with the main pipeline through a tee joint 20 and is positioned between the air inlet electromagnetic valve 26 and the air outlet electromagnetic valve 28;
the branch pipeline is sequentially communicated with a three-way electromagnetic valve 27, a pressure sensor 13 and a gas adapter 15, and the gas adapter 15 is communicated with a to-be-detected cavity of the fuel cell stack 21;
the three-way electromagnetic valve 27 is also communicated with the flowmeter 17;
a plurality of branch pipelines are connected in parallel on the main pipeline.
In the embodiment, all pressure gauges 16 are replaced by pressure sensors 13 on the basis of the embodiment 2, and data are collected through a computer; all the hand valves can be replaced by electromagnetic valves, and an automatic control process is realized through a controller. The complicated operation steps of operators are saved, the instrument can detect the parameters of gas such as flow, pressure and the like in real time, and the stable operation of the detection process is ensured.
Example 4
As shown in fig. 1, the present embodiment is detailed based on embodiment 1, and the mobile support frame 3 is provided with an experiment bench power supply 6, and the experiment bench power supply 6 is communicated with a display and a pressure sensor 13.
Specifically, the bottom of the movable support frame 3 is provided with universal wheels 9.
In this embodiment, the universal wheel 9 is a silent universal wheel 9. The device is not only fast and silent in movement, but also does not generate noise in the moving process. The universal wheel 9 makes the experiment bench have mobility to from taking the power, can accomplish to follow the usefulness and survey, make the experimental space more nimble.
Example 5
As shown in fig. 1, in the present embodiment, the air supply port 8 is provided in plurality, as a refinement of embodiment 1. Specifically, the end of the movable supporting frame 3 is provided with a writing board 5, the movable supporting frame 3 is provided with a movable support 2, and the movable support 2 is used for supporting the test panel 1. Specifically, the movable support frame 3 is provided with a storage space 4.
In this embodiment, the movable support 2 can be detached and moved, and when detecting the fuel cell stack 21, the movable support 2 can be adjusted or detached left and right according to the position of the fuel cell stack 21, so that the operator can directly perform the experiment operation on the experiment bench. As shown in fig. 1, the air supply port 8 is provided in plural for simultaneously detecting plural fuel cell stacks 21, and is generally provided in two.
Still be provided with on the portable frame board 5, be convenient for place computer or record originally, make operating personnel can directly carry out the record on the experiment platform, storage space 4's setting, the depositing and the change of the gas cylinder 10 of being convenient for makes the device can carry out the gas tightness as required to the fuel cell pile 21 of different positions department and detects.
Example 6
As shown in fig. 1, in this embodiment, a refinement is performed on the basis of embodiment 1, and the movable supporting frame 3 is a hollow structure.
In this embodiment, because the gas-liquid interface of most of fuel cell galvanic piles 21 all sets up in fuel cell galvanic pile 21 below at present stage, so make the experiment platform fretwork, can make the interface stretch out the platform, be connected through the pipeline with test panel 1 again, this setting still is convenient for operating personnel controlling means's removal simultaneously, need not to add the handle again, makes the device more succinct.
It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a novel fuel cell pressurize experiment rack which characterized in that includes:
the mobile support frame is arranged on a test panel at the top of the mobile support frame, a gas cylinder is fixedly arranged in the mobile support frame, and a gas pressure conversion device is arranged at a gas supply port of the gas cylinder;
and communicating the fuel cell stack with the test panel, and detecting the air tightness of the fuel cell stack by the test panel through the air supply of the air bottle and the action of the gas pressure converter.
2. The novel fuel cell pressure holding experimental bench as claimed in claim 1, wherein the test panel comprises:
the air inlet of the pressure regulating valve is communicated with the air supply port, and the air outlet of the exhaust hand valve is communicated with the exhaust port;
the branch pipeline is communicated with the main pipeline through a tee joint and is positioned between the air inlet hand valve and the air outlet hand valve;
the branch pipeline is sequentially communicated with a three-way hand valve, a pressure gauge and a gas adapter, and the gas adapter is communicated with a to-be-detected cavity of the fuel cell stack;
the three-way hand valve is also communicated with a flowmeter.
3. The novel fuel cell pressure holding experimental bench as claimed in claim 2, wherein the test panel further comprises:
the main pipeline is connected with a plurality of branch pipelines in parallel.
4. The novel fuel cell pressure holding experimental bench as claimed in claim 1, wherein the test panel comprises:
the air inlet of the pressure regulating valve is communicated with the air supply port, and the air outlet of the exhaust electromagnetic valve is communicated with the exhaust port;
the branch pipeline is communicated with the main pipeline through a tee joint and is positioned between the air inlet electromagnetic valve and the air outlet electromagnetic valve;
the branch pipeline is sequentially communicated with a three-way electromagnetic valve, a pressure sensor and a gas adapter, and the gas adapter is communicated with a to-be-detected cavity of the fuel cell stack;
the three-way electromagnetic valve is also communicated with a flowmeter;
the main pipeline is connected with a plurality of branch pipelines in parallel.
5. The novel fuel cell pressure maintaining experiment bench according to claim 1, characterized in that:
an experiment bench power supply is arranged on the movable supporting frame and communicated with the display and the pressure sensor.
6. The novel fuel cell pressure maintaining experiment bench according to claim 1, characterized in that:
the air supply port is a plurality of.
7. The novel fuel cell pressure maintaining experiment bench according to claim 1, characterized in that:
the end part of the movable supporting frame is provided with a writing board, a movable support is arranged on the movable supporting frame and used for supporting the test panel.
8. The novel fuel cell pressure maintaining experiment bench according to claim 1, characterized in that:
the movable supporting frame is of a hollow structure.
9. The novel fuel cell pressure maintaining experiment bench according to claim 1, characterized in that:
the movable supporting frame body is provided with a storage space.
10. The novel fuel cell pressure maintaining experiment bench according to claim 1, characterized in that:
the bottom of the movable supporting frame is provided with universal wheels.
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| CN201921334415.7U CN210464833U (en) | 2019-08-16 | 2019-08-16 | Novel fuel cell pressure maintaining experiment bench |
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| CN201921334415.7U CN210464833U (en) | 2019-08-16 | 2019-08-16 | Novel fuel cell pressure maintaining experiment bench |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112082056A (en) * | 2020-09-10 | 2020-12-15 | 广州云也科技有限公司 | Novel fuel cell pressure maintaining experiment bench |
| EP4286818A3 (en) * | 2022-06-02 | 2024-01-03 | Rud. Prey GmbH | Test device for testing fluid-conducting components |
-
2019
- 2019-08-16 CN CN201921334415.7U patent/CN210464833U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112082056A (en) * | 2020-09-10 | 2020-12-15 | 广州云也科技有限公司 | Novel fuel cell pressure maintaining experiment bench |
| EP4286818A3 (en) * | 2022-06-02 | 2024-01-03 | Rud. Prey GmbH | Test device for testing fluid-conducting components |
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