CN222562707U - Hydrogen subsystem for fuel cell testing system - Google Patents
Hydrogen subsystem for fuel cell testing system Download PDFInfo
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- CN222562707U CN222562707U CN202420354692.9U CN202420354692U CN222562707U CN 222562707 U CN222562707 U CN 222562707U CN 202420354692 U CN202420354692 U CN 202420354692U CN 222562707 U CN222562707 U CN 222562707U
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- 239000001257 hydrogen Substances 0.000 title claims abstract description 204
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 204
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 199
- 239000000446 fuel Substances 0.000 title claims abstract description 66
- 238000012360 testing method Methods 0.000 title claims abstract description 56
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 92
- 239000007788 liquid Substances 0.000 claims abstract description 46
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 46
- 239000007789 gas Substances 0.000 claims abstract description 40
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- 238000010926 purge Methods 0.000 claims description 13
- 229920000742 Cotton Polymers 0.000 claims description 7
- 238000004321 preservation Methods 0.000 claims description 7
- 150000002431 hydrogen Chemical class 0.000 abstract description 8
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000012544 monitoring process Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000000243 solution Substances 0.000 description 5
- 238000000926 separation method Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Fuel Cell (AREA)
Abstract
The utility model discloses a hydrogen subsystem of a fuel cell test system, which comprises a hydrogen supply assembly, a hydrogen circulation assembly and a gas discharge assembly, wherein the hydrogen supply assembly comprises a hydrogen supply pipeline, a first flowmeter, an ejector, a humidifier and a heater which are sequentially arranged on the hydrogen supply pipeline, the hydrogen supply pipeline is connected with an anode inlet of a fuel cell, the gas discharge assembly comprises a gas discharge pipeline which is connected with an anode outlet of the fuel cell, the hydrogen circulation assembly comprises a hydrogen circulation pipeline and a gas-liquid separator arranged on the hydrogen circulation pipeline, two ends of the hydrogen circulation pipeline are respectively connected with the ejector and the gas discharge pipeline, and the hydrogen circulation pipeline is externally connected with a heating and heat-preserving device. The utility model has the beneficial effects of reducing the consumption of the test system to the hydrogen, reducing the nitrogen concentration in the hydrogen in the stack and simplifying the test system.
Description
Technical Field
The utility model relates to the field of fuel cells, in particular to a hydrogen subsystem for a fuel cell test system.
Background
The proton exchange membrane fuel cell is an energy conversion device which is efficient and clean, and has wide application prospect. Hydrogen is fuel of a fuel cell, in order to make the fuel cell achieve ideal power generation, excessive hydrogen and air are usually introduced, if the excessive hydrogen in the fuel cell test system directly enters the tail row, a great deal of hydrogen waste is caused in the high-power pile test system, so that the excessive hydrogen needs to be recycled at present for energy saving and safety.
The fuel cell hydrogen subsystem is a hydrogen supply, humidification heating and circulation device. On the one hand, excessive hydrogen in the fuel cell test system often directly enters the tail row, and a large amount of hydrogen is wasted in the high-power electric pile test system. On the one hand, the existing test system with the hydrogen circulation function is often realized by adopting a hydrogen circulation pump, the hydrogen circulation pump has higher operation load under a large flow, the service life is limited, the manufacturing cost is high, and the cost of the test system is greatly increased. On the one hand, the control of the flow in the hydrogen supply of the existing fuel cell test system is a mass flow controller, which is costly. On the other hand, the existing hydrogen circulation device often adopts an external connection mode, namely, a hydrogen circulation pump is connected with a fuel cell and a hydrogen supply pipeline outside an original test bench, so that the space of a test system can be increased, and meanwhile, the appearance is reduced. During testing of the high-power fuel cell, a plurality of hydrogen circulating pumps are required to be connected in parallel, and the volume of a testing system is further increased. The space of the test system will be increased while the aesthetics will be reduced.
The patent publication No. CN116314943A discloses an external hydrogen circulation device of a fuel cell test bench, which specifically comprises a fuel cell stack, a hydrogen circulation pump, a control cabinet, a hydrogen gas source and a water-gas separation assembly. The hydrogen recycling is realized by externally connecting a hydrogen circulating pump, and the emission of nitrogen is not considered. In actual operation, a small amount of nitrogen permeates from the air side to the hydrogen side, and the hydrogen concentration of the hydrogen side is reduced in long-term operation, so that the output performance of the fuel cell is reduced.
The publication No. CN215418247U discloses a fuel cell system with a proportional valve, which comprises a hydrogen source, a pressure reducing valve, a hydrogen spray, a system controller, an ejector, a galvanic pile and a gas-liquid separator. The fuel cell system is integrated and designed by combining the switch valve, the proportional valve and the cavity in the injection device. However, the utility model does not monitor the flow of hydrogen, and has a certain risk. While nitrogen removal is not considered.
The information disclosed in this background section is only for enhancement of understanding of the general background of the utility model and should not be taken as an acknowledgement or any form of suggestion that this information has been made as prior art that is well known to a person of ordinary skill in the art.
Disclosure of utility model
The utility model aims to solve the technical problems that the existing hydrogen subsystem is realized by adopting a circulating pump, the circulating pump cannot operate for a long time under high humidity and high temperature, the service life is limited, and the volume of a test system is increased.
The utility model solves the technical problems by the following technical means:
The hydrogen subsystem of the fuel cell testing system comprises a hydrogen supply assembly, a hydrogen circulation assembly and a gas discharge assembly, wherein the hydrogen supply assembly comprises a hydrogen supply pipeline, a first flowmeter, an ejector, a humidifier and a heater which are sequentially arranged on the hydrogen supply pipeline, the hydrogen supply pipeline is connected with an anode inlet of a fuel cell, the gas discharge assembly comprises a gas discharge pipeline which is connected with an anode outlet of the fuel cell, the hydrogen circulation assembly comprises a hydrogen circulation pipeline and a gas-liquid separator arranged on the hydrogen circulation pipeline, two ends of the hydrogen circulation pipeline are respectively connected with the ejector and the gas discharge pipeline, and the hydrogen circulation pipeline is externally connected with a heating and heat preservation device.
In the utility model, hydrogen enters the fuel cell through the hydrogen supply assembly and then enters the gas discharge assembly, and part of hydrogen enters the hydrogen supply assembly again through gas-liquid separation and heating and heat preservation by the hydrogen circulation assembly so as to realize reutilization, thereby reducing hydrogen waste. According to the utility model, on one hand, the ejector is utilized to realize hydrogen circulation of the fuel cell test system, so that the consumption of the test system on hydrogen is reduced, on the other hand, the ejector proportional valve and the nitrogen discharge valve assembly, the proportional valve and the first flowmeter at the front end can realize control and detection of the flow of hydrogen entering the ejector, the nitrogen discharge valve regularly discharges nitrogen in the drained hydrogen, so that the concentration of nitrogen in the hydrogen entering the stack is reduced, on the other hand, the ejector is small in volume and is better integrated in the test system compared with the small volume of the hydrogen circulating pump, and meanwhile, the ejector with the proportional valve can replace a mass flow controller, so that the test system is simplified.
Preferably, the hydrogen supply assembly further comprises a first valve, a first pressure reducing valve, a second valve, a first flowmeter and a first pressure sensor which are sequentially arranged on the hydrogen supply pipeline, and the first pressure sensor is located at the inlet end of the ejector.
Preferably, a second pressure sensor and a first temperature sensor are also arranged on the hydrogen supply pipeline between the ejector and the humidifier.
Preferably, a third pressure sensor and a second temperature sensor are also installed on the hydrogen supply pipe between the heater and the fuel cell.
Preferably, a third valve and a back pressure valve are also installed on the gas exhaust pipeline in sequence, and the third valve is positioned at the rear end of the joint of the hydrogen circulation pipeline and the gas exhaust pipeline.
Preferably, the heating and heat-preserving device comprises a heat tracing band and heat-preserving cotton, the outer surface of the hydrogen circulation pipeline is connected with the heat tracing band, and the heat tracing band is externally wrapped with the heat-preserving cotton.
The heating and heat preserving device can keep the inlet temperature of the hydrogen and reduce the load of the heater.
Preferably, the inlet end of the gas-liquid separator is further connected with a fourth valve, and the outlet end of the gas-liquid separator is further connected with a second flowmeter, a sixth valve, a fourth pressure sensor and a third temperature sensor in sequence.
Preferably, the side part of the gas-liquid separator is provided with a first liquid level sensor and a second liquid level sensor at intervals along the height direction, the bottom of the gas-liquid separator is connected with a drainage pipeline, and a fifth valve is arranged on the drainage pipeline.
Preferably, the nitrogen purging device further comprises a nitrogen purging component, wherein the nitrogen purging component comprises a nitrogen pipeline, and a seventh valve, a second pressure reducing valve, an eighth valve, a first flow controller and a ninth valve which are sequentially connected to the nitrogen pipeline.
The nitrogen purging is mainly performed before hydrogen is introduced and after hydrogen is closed, and is mainly used for preventing the hydrogen from being mixed with air in a pipeline, so that the safety is improved.
Preferably, the system further comprises a second flow controller and a tenth valve, wherein the tenth valve is arranged on the hydrogen supply pipeline and positioned at the front end of the ejector, two ends of the second flow controller are respectively connected with the hydrogen supply pipeline and the nitrogen pipeline, the joint of the second flow controller and the hydrogen supply pipeline is positioned at the front end of the tenth valve, and the joint of the second flow controller and the nitrogen pipeline is positioned at the rear end of the ninth valve.
The second flow controller is a high-pressure flow controller and can more accurately control the flow of hydrogen into the ejector, the ejector does not need to be provided with a proportional valve, and the tenth valve is in a closed state. The addition of the first flow controller and the second flow controller enables the system to have an accurate gas mixing function, and the function of the test system is more perfect.
The utility model has the advantages that:
In the utility model, hydrogen enters the fuel cell through the hydrogen supply assembly and then enters the gas discharge assembly, and part of hydrogen enters the hydrogen supply assembly again through gas-liquid separation and heating and heat preservation by the hydrogen circulation assembly so as to realize reutilization, thereby reducing hydrogen waste. According to the utility model, on one hand, the ejector is utilized to realize hydrogen circulation of the fuel cell test system, so that the consumption of the test system on hydrogen is reduced, on the other hand, the ejector proportional valve and the nitrogen discharge valve assembly, the proportional valve and the first flowmeter at the front end can realize control and detection of the flow of hydrogen entering the ejector, the nitrogen discharge valve regularly discharges nitrogen in the drained hydrogen, so that the concentration of nitrogen in the hydrogen entering the stack is reduced, on the other hand, the ejector is small in volume and is better integrated in the test system compared with the small volume of the hydrogen circulating pump, and meanwhile, the ejector with the proportional valve can replace a mass flow controller, so that the test system is simplified.
The heating and heat preserving device can keep the inlet temperature of the hydrogen and reduce the load of the heater.
The nitrogen purging is mainly performed before hydrogen is introduced and after hydrogen is closed, and is mainly used for preventing the hydrogen from being mixed with air in a pipeline, so that the safety is improved.
The second flow controller is a high-pressure flow controller and can more accurately control the flow of hydrogen into the ejector, the ejector does not need to be provided with a proportional valve, and the tenth valve is in a closed state. The addition of the first flow controller and the second flow controller enables the system to have an accurate gas mixing function, and the function of the test system is more perfect.
Drawings
FIG. 1 is a schematic diagram showing the connection of a hydrogen subsystem of a fuel cell testing system according to a first embodiment of the present utility model;
FIG. 2 is a schematic diagram of the operation of the hydrogen subsystem of the fuel cell testing system according to the first embodiment of the present utility model;
FIG. 3 is a schematic diagram showing the connection of the hydrogen subsystem of the fuel cell testing system according to the second embodiment of the present utility model;
reference numerals in the drawings:
100. Hydrogen supply assembly, 101, hydrogen supply pipeline, 102, first valve, 103, first pressure reducing valve, 104, second valve, 105, first flowmeter, 106, first pressure sensor, 107, ejector, 108, second pressure sensor, 109, first temperature sensor, 110, humidifier, 111, heater, 112, third pressure sensor, 113, second temperature sensor;
200. The device comprises a hydrogen circulation assembly, a hydrogen circulation pipeline, 202, a fourth valve, 203, a gas-liquid separator, 204, a second flowmeter, 205, a sixth valve, 206, a fourth pressure sensor, 207, a third temperature sensor, 208, a heating and heat preserving device, 209, a first liquid level sensor, 210, a second liquid level sensor, 211 and a fifth valve;
300. A gas exhaust assembly, 301, a gas exhaust pipeline, 302, a third valve, 303, a back pressure valve;
400. a fuel cell;
500. Nitrogen purging component, 501, nitrogen pipeline, 502, seventh valve, 503, second pressure reducing valve, 504, eighth valve, 505, first flow controller, 506, ninth valve.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions in the embodiments of the present utility model will be clearly and completely described in the following in conjunction with the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Embodiment one:
As shown in fig. 1 and 2, the hydrogen subsystem of the fuel cell test system includes a hydrogen supply assembly 100, a hydrogen circulation assembly 200, and a gas exhaust assembly 300, wherein the hydrogen supply assembly 100 supplies hydrogen to the fuel cell 400, and the hydrogen circulation assembly 200 processes the hydrogen at the rear end of the fuel cell and reintroduces the processed hydrogen into the fuel cell 400 for use. The gas discharge assembly 300 is used for exhaust gas discharge.
The hydrogen supply assembly 100 includes a hydrogen supply pipe 101, a first valve 102, a first pressure reducing valve 103, a second valve 104, a first flowmeter 105, a first pressure sensor 106, an ejector 107, a second pressure sensor 108, a first temperature sensor 109, a humidifier 110, a heater 111, a third pressure sensor 112, and a second temperature sensor 113, which are sequentially installed on the hydrogen supply pipe 101, wherein the left end of the hydrogen supply pipe 101 is a hydrogen source, and the right end is connected with an anode inlet of the fuel cell 400.
The first pressure sensor 106 is used for monitoring and measuring the hydrogen pressure of the ejector 107, and a first flowmeter 105 is arranged at the front end of the first pressure sensor 106 and used for monitoring and measuring the control of the proportional valve in the ejector 107 component on the hydrogen flow. The first pressure reducing valve 103 is used to control the hydrogen pressure into the eductor 107. The pressure is generally in the range from 5 to 20bar. The second pressure sensor 108 and the first temperature sensor 109 are positioned at the rear end of the outlet of the ejector 107 and are used for monitoring and measuring the pressure and the temperature of the hydrogen outlet of the ejector 107. The humidifier 110 is located after the first temperature sensor 109, and the hydrogen gas entering the fuel cell 400 is humidified. Wherein the humidifier 110 may be bubbled, sprayed, or steam humidified. The heater 111 is located at the rear end of the humidifier 110, and is used for controlling the temperature of the hydrogen entering the fuel cell 400, and the pipeline between the humidifier 110 and the fuel cell 400 is insulated by the heat tracing belt and the heat insulation cotton, so that the temperature of the gas is prevented from being reduced, the condensation of water vapor is prevented, and the load of the test system is reduced. The fuel cell 400 is provided with a third pressure sensor 112 and a second temperature sensor 113 at the inlet front end pipe for monitoring and measuring the pressure and temperature of the hydrogen before entering the fuel cell 400.
The ejector 107 includes components thereof such as a switch valve, a proportional valve, a pressure sensor, a temperature sensor, a pressure release valve, a nitrogen discharge valve, and the like.
The hydrogen circulation assembly 200 includes a hydrogen circulation pipe 201, a fourth valve 202 installed on the hydrogen circulation pipe 201, a gas-liquid separator 203, a second flowmeter 204, a sixth valve 205, a fourth pressure sensor 206, and a third temperature sensor 207. The two ends of the hydrogen circulation pipeline 201 are respectively connected with the ejector 107 and the gas discharge pipeline 301, and the hydrogen circulation pipeline 201 is externally connected with a heating and heat preserving device 208. The heating and heat preserving device 208 comprises a heat tracing band and heat preserving cotton, the outer surface of the hydrogen circulation pipeline 201 is connected with the heat tracing band, and the heat tracing band is externally wrapped with the heat preserving cotton. The heating and insulating device 208 can maintain the inlet temperature of the hydrogen gas and reduce the load of the heater 111.
The side of the gas-liquid separator 203 is provided with a first liquid level sensor 209 and a second liquid level sensor 210 at intervals along the height direction, the water outlet of the gas-liquid separator 203 is positioned at the bottom of the gas-liquid separator 203, the bottom of the gas-liquid separator 203 is connected with a drainage pipeline, and a fifth valve 211 is arranged on the drainage pipeline.
The gas-liquid separator 203 is located at the rear end of the outlet of the fuel cell 400, and separates water in the outlet hydrogen. A first liquid level sensor 209 and a second liquid level sensor 210 of the gas-liquid separator 203 are used for monitoring and measuring the liquid level of water in the gas-liquid separator 203. The fifth valve 211 is a solenoid valve, a pneumatic valve or an electric valve, which forms closed loop control with the gas-liquid separator 203, and when the liquid level reaches the second liquid level sensor 210, the fifth valve 211 is opened to drain, and when the liquid level reaches the first liquid level sensor 209, the fifth valve 211 is closed to drain.
The gas outlet of the gas-liquid separator 203 is located at the upper part of the gas-liquid separator 203, and the second flowmeter 204 is located at the outlet and is used for monitoring the flow of the hydrogen flowing back from the ejector 107. A fourth pressure sensor 206 and a third temperature sensor 207 are located at the return inlet line of the eductor 107 for monitoring and measuring the pressure and temperature of the return gas.
The gas exhaust assembly 300 includes a gas exhaust pipe 301, and a third valve 302 and a back pressure valve 303 mounted on the gas exhaust pipe 301, the third valve 302 being located at the rear end of the connection between the hydrogen circulation pipe 201 and the gas exhaust pipe 301, the gas exhaust pipe 301 being connected to the anode outlet of the fuel cell 400.
In this embodiment, hydrogen enters the fuel cell 400 through the hydrogen supply assembly 100, then enters the gas exhaust assembly 300, and part of the hydrogen enters the hydrogen supply assembly 100 again through gas-liquid separation and heating and heat preservation by the hydrogen circulation assembly 200, so that the reutilization is realized, and the hydrogen waste is reduced. Specifically, the dry high-pressure hydrogen enters the front end of the first pressure reducing valve 103 through the first valve 102, the hydrogen enters the ejector 107 through the second valve 104 after being depressurized, the hydrogen enters the humidifier 110 after being regulated and controlled by the ejector 107 and components thereof, the dry hydrogen is humidified and heated to become saturated and humidified hydrogen, the saturated and humidified hydrogen enters the heater 111, and the saturated and humidified hydrogen enters the anode inlet of the fuel cell 400 after being regulated and controlled by the temperature of the heater 111. Hydrogen and water which are not consumed by the fuel cell 400 enter the gas-liquid separator 203 through a pipeline, gas and liquid are separated through the gas-liquid separator 203, liquid water is discharged through a drainage pipeline, and gas is circulated to a backflow inlet of the ejector 107 through the second flowmeter 204, so that hydrogen circulation is completed. The nitrogen purge valve of the eductor 107 periodically purges nitrogen to reduce the concentration of nitrogen in the hydrogen subsystem. The opening of the inlet of the ejector 107 is adjusted according to the flow fed back by the first flowmeter 105 at the front end of the ejector 107, and the pressure of the backflow inlet of the ejector 107 can be adjusted by the sixth valve 205 in the circulation loop.
In this embodiment, on one hand, the ejector 107 is used to realize the hydrogen circulation of the fuel cell 400 test system, so as to reduce the consumption of the test system to hydrogen, on the other hand, the ejector 107 is provided with a proportional valve and a nitrogen discharge valve assembly, the proportional valve and the first flowmeter 105 at the front end can realize the control and detection of the flow of hydrogen into the ejector 107, the nitrogen discharge valve regularly discharges nitrogen in the drained hydrogen, so as to reduce the concentration of nitrogen in the hydrogen into the stack, on the other hand, the ejector 107 is small in volume, and compared with the hydrogen circulation pump, the ejector 107 is small in volume, is better integrated in the test system, and meanwhile, the ejector 107 with the proportional valve can replace a mass flow controller, so that the test system is simplified.
Example two
As shown in fig. 3, the hydrogen subsystem of the fuel cell test system further comprises a nitrogen purge assembly 500, wherein the nitrogen purge assembly 500 comprises a nitrogen pipeline 501, and a seventh valve 502, a second pressure reducing valve 503, an eighth valve 504, a first flow controller 505 and a ninth valve 506 which are sequentially connected to the nitrogen pipeline 501.
The hydrogen subsystem of the fuel cell test system further comprises a second flow controller 507 and a tenth valve 508, wherein the tenth valve 508 is installed on the hydrogen supply pipeline 101 and is positioned at the front end of the ejector 107, two ends of the second flow controller 507 are respectively connected with the hydrogen supply pipeline 101 and the nitrogen pipeline 501, the connection part of the second flow controller 507 and the hydrogen supply pipeline 101 is positioned at the front end of the tenth valve 508, and the connection part of the second flow controller 507 and the nitrogen pipeline 501 is positioned at the rear end of the ninth valve 506.
The second flow controller 507 is a high-pressure flow controller, so that the flow of the hydrogen into the ejector 107 can be more accurately controlled, the ejector 107 may not have a proportional valve, and the tenth valve 508 is in a closed state.
The addition of the first flow controller 505 and the second flow controller 507 enables the system to have an accurate gas mixing function, so that the function of the test system is more perfect.
The nitrogen may also be replaced by other inert gases.
The working process of the second embodiment is the same as that of the first embodiment, and the nitrogen purging function is mainly added on the basis of the first embodiment, and the nitrogen purging is mainly performed before hydrogen is introduced and after hydrogen is closed, so that the hydrogen is mainly prevented from being mixed with air in a pipeline, and the safety is improved.
The second embodiment can also realize the gas mixing function of hydrogen and nitrogen. The hydrogen flow can be controlled by a mass flowmeter or by a proportional valve and a front-end flowmeter in the ejector 107.
The first and second embodiments described above provide a low cost, high efficiency hydrogen subsystem for a fuel cell testing system. On one hand, the hydrogen can be recycled in a smaller space, and the high-efficiency utilization of the hydrogen by the galvanic pile in the test system is realized. On one hand, the test system realizes the control of the hydrogen flow by using the proportional valve in the ejector 107, and realizes the simplification of the hydrogen subsystem.
The ejector 107 may be a combination of the ejector 107 and a hydrogen circulation pump.
The foregoing embodiments are merely for illustrating the technical solution of the present utility model, but not for limiting the same, and although the present utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that modifications may be made to the technical solution described in the foregoing embodiments or equivalents may be substituted for parts of the technical features thereof, and that such modifications or substitutions do not depart from the spirit and scope of the technical solution of the embodiments of the present utility model in essence.
Claims (10)
1. The hydrogen subsystem of the fuel cell testing system is characterized by comprising a hydrogen supply assembly, a hydrogen circulation assembly and a gas discharge assembly, wherein the hydrogen supply assembly comprises a hydrogen supply pipeline, a first flowmeter, an ejector, a humidifier and a heater which are sequentially arranged on the hydrogen supply pipeline, the hydrogen supply pipeline is connected with an anode inlet of a fuel cell, the gas discharge assembly comprises a gas discharge pipeline which is connected with an anode outlet of the fuel cell, the hydrogen circulation assembly comprises a hydrogen circulation pipeline and a gas-liquid separator arranged on the hydrogen circulation pipeline, two ends of the hydrogen circulation pipeline are respectively connected with the ejector and the gas discharge pipeline, and the hydrogen circulation pipeline is externally connected with a heating and heat-preserving device.
2. The hydrogen subsystem of a fuel cell testing system of claim 1, wherein the hydrogen supply assembly further comprises a first valve, a first pressure relief valve, a second valve, a first flow meter, a first pressure sensor, mounted in sequence on the hydrogen supply conduit, the first pressure sensor being located at the inlet end of the eductor.
3. The hydrogen subsystem of a fuel cell testing system according to claim 1, wherein a second pressure sensor and a first temperature sensor are also mounted on the hydrogen supply conduit between the eductor and the humidifier.
4. The hydrogen subsystem of a fuel cell testing system according to claim 1, wherein a third pressure sensor and a second temperature sensor are also mounted on the hydrogen supply conduit between the heater and the fuel cell.
5. The hydrogen subsystem of a fuel cell testing system according to claim 1, wherein a third valve and a back pressure valve are further installed on the gas exhaust pipe in sequence, and the third valve is located at the rear end of the connection between the hydrogen circulation pipe and the gas exhaust pipe.
6. The hydrogen subsystem of the fuel cell testing system according to claim 1, wherein the heating and heat preservation device comprises a heat tracing band and heat preservation cotton, the outer surface of the hydrogen circulation pipeline is connected with the heat tracing band, and the heat tracing band is wrapped with the heat preservation cotton.
7. The hydrogen subsystem of a fuel cell testing system of claim 1, wherein the inlet end of the gas-liquid separator is further connected to a fourth valve, and the outlet end of the gas-liquid separator is further connected in sequence to a second flowmeter, a sixth valve, a fourth pressure sensor, and a third temperature sensor.
8. The hydrogen subsystem of a fuel cell testing system of claim 1, wherein the side of the gas-liquid separator is provided with a first liquid level sensor and a second liquid level sensor at intervals along the height direction, the bottom of the gas-liquid separator is connected with a drain pipe, and a fifth valve is arranged on the drain pipe.
9. The hydrogen subsystem of a fuel cell testing system of claim 1, further comprising a nitrogen purge assembly comprising a nitrogen conduit and a seventh valve, a second pressure relief valve, an eighth valve, a first flow controller, a ninth valve connected in sequence to the nitrogen conduit.
10. The hydrogen subsystem of a fuel cell testing system according to claim 9, further comprising a second flow controller and a tenth valve, wherein the tenth valve is mounted on the hydrogen supply pipe and located at the front end of the injector, two ends of the second flow controller are respectively connected with the hydrogen supply pipe and the nitrogen supply pipe, a connection part of the second flow controller and the hydrogen supply pipe is located at the front end of the tenth valve, and a connection part of the second flow controller and the nitrogen supply pipe is located at the rear end of the ninth valve.
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| CN202420354692.9U CN222562707U (en) | 2024-02-26 | 2024-02-26 | Hydrogen subsystem for fuel cell testing system |
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| CN202420354692.9U CN222562707U (en) | 2024-02-26 | 2024-02-26 | Hydrogen subsystem for fuel cell testing system |
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