Hydrogen fuel cell test equipment and hydrogen fuel cell simulation system

Abstract

The utility model provides hydrogen fuel cell test equipment and a hydrogen fuel cell simulation system, and the hydrogen fuel cell test equipment comprises a main gas inlet pipeline assembly which comprises a main gas inlet pipeline and an ejector, and the ejector is arranged on the main gas inlet pipeline; the main loop pipeline assembly comprises a main loop pipeline, a first branch, a second branch, a gas-water separation structure, a circulating pump and a three-way valve, the gas-water separation structure is arranged on the main loop pipeline, the first branch and the second branch are both communicated with the gas outlet end of the main loop pipeline, the circulating pump is arranged on the first branch, and the three-way valve is arranged on the second branch. The three-way valve comprises a first connector, a second connector and a third connector, the first branch is communicated with the first connector, the second branch is communicated with the ejector, the second connector is communicated with the main air inlet pipeline assembly, and the third connector is communicated with the second branch. According to the technical scheme, the problem of low test efficiency in the hydrogen fuel cell test process in the prior art is effectively solved.

Description

Technical Field

[0001] The present application relates to the technical field of hydrogen fuel cell testing, and in particular to a hydrogen fuel cell testing device and a hydrogen fuel cell simulation system. Background Art

[0002] In recent years, with policy support, domestic hydrogen fuel cell technology has made significant progress, with installed capacity increasing significantly. As demand for hydrogen fuel cell systems continues to grow, technological improvements can further reduce the cost of hydrogen fuel cell stacks and system products.

[0003] Usually, during the hydrogen fuel cell test process, the ejector and the circulation pump are connected in series or in parallel. The ejector is used to pass hydrogen to the positive electrode of the battery to participate in the reaction. The residual hydrogen is then returned to the ejector through the circulation pump. The flow rate and pressure at various points in the entire circuit are measured for data comparison.

[0004] In the prior art, when conducting comparative experiments, it is necessary to reconnect the gas circuit, which is cumbersome and has low work efficiency, such as CN215641717U. Utility Model Content

[0005] A technical problem to be solved by this application is that during the hydrogen fuel cell testing process, there is a problem of low testing efficiency.

[0006] In order to solve the above technical problems, the present application provides a hydrogen fuel cell testing device and a hydrogen fuel cell simulation system.

[0007] A hydrogen fuel cell testing device provided according to the present application includes: a main air intake pipeline assembly, the main air intake pipeline assembly includes a main air intake pipeline and an ejector, and the ejector is arranged on the main air intake pipeline; a main loop pipeline assembly, the main loop pipeline assembly includes a main loop pipeline, a first branch, a second branch, an air-water separation structure, a circulation pump and a three-way valve, the air-water separation structure is arranged on the main loop pipeline, the first branch and the second branch are both connected to the air outlet end of the main loop pipeline, the circulation pump is arranged on the first branch, the three-way valve includes a first interface, a second interface and a third interface, the first branch is connected to the first interface, the second branch is connected to the ejector, the second interface is connected to the main air intake pipeline assembly, and the third interface is connected to the second branch.

[0008] In some embodiments, the main loop pipeline assembly further includes a first valve, which is disposed on the second branch.

[0009] In some embodiments, the gas-water separation structure includes a gas-water separator, an exhaust pipeline and a drainage pipeline. The gas-water separator is arranged on the main loop pipeline, and the exhaust pipeline and the drainage pipeline are both connected to the gas-water separator.

[0010] In some embodiments, one end of the exhaust pipe away from the gas-water separator is connected to one end of the drain pipe away from the gas-water separator.

[0011] In some embodiments, the main air intake pipeline assembly also includes an air supply structure, which includes an air source, an air supply pipeline and a second valve. The second valve is arranged on the air supply pipeline. The first end of the air supply pipeline is connected to the air source, and the second end of the air supply pipeline is connected to the ejector.

[0012] In some embodiments, the main intake line assembly further includes a third branch and a third valve, the first end of the third branch is connected to the main intake line, the third valve is arranged on the third branch, and the second end of the third branch is connected to the exhaust line.

[0013] In some embodiments, the hydrogen fuel cell testing device further includes a mounting frame assembly, and the main air intake pipeline assembly and the main loop pipeline assembly are both connected to the mounting frame assembly.

[0014] In some embodiments, the mounting frame assembly includes a frame structure and a mounting portion, the mounting portion is movably connected to the frame structure, and the ejector, the air-water separation structure and the circulation pump are all fixed on the mounting portion.

[0015] In some embodiments, the frame structure has a long hole, and a fastener is provided between the mounting portion and the long hole.

[0016] According to another aspect of the present application, a hydrogen fuel cell simulation system is also provided. The hydrogen fuel cell simulation system adopts the above-mentioned hydrogen fuel cell testing equipment. The hydrogen fuel cell simulation system includes: a first simulation pipeline structure, a hydrogen storage container and a second simulation pipeline structure. The first end of the first simulation pipeline structure is connected to the main loop pipeline, the second end of the first simulation pipeline structure is connected to the hydrogen storage container, the first end of the second simulation pipeline structure is connected to the hydrogen storage container, and the second end of the second simulation pipeline structure is connected to the main intake pipeline.

[0017] Through the above technical solution, the hydrogen fuel cell testing equipment provided by the present application opens the first interface and the second interface, and closes the third interface. At this time, part of the hydrogen flowing out from the anode enters the first branch and enters from the first interface of the three-way valve through the circulation pump, flows out from the second interface and then returns to the main air intake pipeline. The remaining part of the hydrogen enters the second branch and returns to the ejector. The circulation pump and the ejector are in parallel state, and the air pressure and flow at various points in the pipeline are measured and the data is recorded; open the first interface and the third interface, close the second interface, and the hydrogen enters the first branch and flows through the circulation pump and enters from the first interface of the three-way valve, flows out from the second interface and then enters the ejector. At this time, the circulation pump and the ejector are in series state, and the air pressure and flow at various points in the pipeline are measured and the data is recorded, so that a performance comparison experiment of series and parallel can be carried out. The technical solution of the present application effectively solves the problem of low test efficiency in the hydrogen fuel cell testing process in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0019] Figure 1 A schematic structural diagram of a hydrogen fuel cell testing device disclosed in an embodiment of the present application is shown;

[0020] Figure 2 Shown Figure 1 A schematic structural diagram of a mounting frame assembly for a hydrogen fuel cell test device;

[0021] Figure 3 Shown Figure 1 A schematic diagram of a partially enlarged structure of a mounting frame assembly of a hydrogen fuel cell test equipment;

[0022] Figure 4 A schematic structural diagram of a hydrogen fuel cell simulation system disclosed in an embodiment of the present application is shown.

[0023] Description of reference numerals:

[0024] 10. Main air intake pipeline assembly; 11. Main air intake pipeline; 12. Ejector; 13. Air supply structure; 131. Air source; 132. Air supply pipeline; 133. Second valve; 14. Third branch; 15. Third valve; 20. Main loop pipeline assembly; 21. Main loop pipeline; 22. First branch; 23. Second branch; 24. Gas-water separation structure; 241. Gas-water separator; 242. Exhaust pipeline; 243. Drain pipeline; 25. Circulation pump; 26. Three-way valve; 261. First interface; 262. Second interface; 263. Third interface; 27. First valve; 30. Mounting frame assembly; 31. Frame structure; 311. Long hole; 32. Mounting part; 41. First simulation pipeline structure; 42. Hydrogen storage container; 43. Second simulation pipeline structure. DETAILED DESCRIPTION

[0025] The following detailed description of the embodiments of the present application is provided in conjunction with the accompanying drawings and examples. The detailed description of the following examples and the accompanying drawings are intended to illustrate the principles of the present application, but are not intended to limit the scope of the present application. The present application may be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but rather encompasses all technical solutions within the scope of the claims.

[0026] The present application provides these embodiments to make this application thorough and complete, and to fully express the scope of this application to those skilled in the art. It should be noted that: unless otherwise specifically stated, the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values ​​set forth in these embodiments should be interpreted as merely exemplary, and not as limiting.

[0027] It should be noted that, in the description of this application, unless otherwise specified, "plurality" means greater than or equal to two; the terms "upper," "lower," "left," "right," "inner," "outer," and the like, indicating directions or positional relationships, are intended solely to facilitate the description of this application and simplify the description, and do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0028] In addition, the terms "first," "second," and similar terms used in this application do not denote any order, quantity, or importance, but are simply used to distinguish different parts. "Perpendicular" does not mean perpendicular in the strict sense, but rather means within the tolerance range. "Parallel" does not mean parallel in the strict sense, but rather means within the tolerance range. "Include" or "comprising" and similar terms mean that the elements preceding the word include the elements listed after the word, and do not exclude the possibility of other elements being included.

[0029] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections or indirect connections through an intermediary. A person of ordinary skill in the art will understand the specific meanings of the above terms in this application depending on the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intervening device between the specific device and the first or second device.

[0030] All terms used in this application have the same meaning as understood by one of ordinary skill in the art to which this application belongs, unless otherwise specifically defined. It should also be understood that terms defined in, for example, common dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology and should not be interpreted in an idealized or highly formal sense, unless explicitly defined as such herein.

[0031] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0032] like Figures 1 to 3 As shown, the hydrogen fuel cell testing equipment disclosed in the embodiment of the present application includes: a main air intake pipeline assembly 10 and a main loop pipeline assembly 20, the main air intake pipeline assembly 10 includes a main air intake pipeline 11 and an ejector 12, the ejector 12 is arranged on the main air intake pipeline 11, the main loop pipeline assembly 20 includes a main loop pipeline 21, a first branch 22, a second branch 23, an air-water separation structure 24, a circulation pump 25 and a three-way valve 26, the air-water separation structure 24 is arranged on the main loop pipeline 21, the first branch 22 and the second branch 23 are both connected to the air outlet end of the main loop pipeline 21, the circulation pump 25 is arranged on the first branch 22, the three-way valve 26 includes a first interface 261, a second interface 262 and a third interface 263, the first branch 22 is connected to the first interface 261, the second branch 23 is connected to the ejector 12, the second interface 262 is connected to the main air intake pipeline assembly 10, and the third interface 263 is connected to the second branch 23.

[0033] By applying the technical solution of this embodiment, the first interface 261 and the second interface 262 are opened, and the third interface 263 is closed. At this time, part of the hydrogen flowing out of the anode enters the first branch 22 and enters the first interface 261 of the three-way valve 26 through the circulation pump 25, flows out from the second interface 262, and then returns to the main intake pipe 11. The remaining part of the hydrogen enters the second branch 23 and returns to the ejector 12. The circulation pump 25 and the ejector 12 are in parallel state, and the air pressure and flow rate at each point in the pipeline are measured and recorded. The first interface 261 and the third interface 263 are opened, and the second interface 262 is closed. After the hydrogen enters the first branch 22, it flows through the circulation pump 25 and enters the first interface 261 of the three-way valve 26, flows out from the second interface 262, and then enters the ejector 12. At this time, the circulation pump 25 and the ejector 12 are in series state, and the air pressure and flow rate at each point in the pipeline are measured and recorded. The performance comparison experiment of series and parallel connection can be carried out. The technical solution of this embodiment effectively solves the problem of low test efficiency in the hydrogen fuel cell test process in the prior art.

[0034] A first pressure gauge and a first flow meter are provided on the main intake pipe 11, a second pressure gauge and a second flow meter are provided on the main loop pipe 21, a third pressure gauge and a third flow meter are provided on the first branch 22, and a fourth pressure gauge and a fourth flow meter are provided on the second branch 23. The first pressure gauge and the first flow meter are used to read the pressure and flow rate of hydrogen entering the anode, while the second pressure gauge and the second flow meter are used to read the pressure and flow rate of gas discharged from the anode. When the first interface 261 and the second interface 262 are open and the third interface 263 is closed, the circulation pump 25 and the ejector 12 are connected in parallel. The third pressure gauge and the third flow meter are used to read the hydrogen pressure and flow rate of the pipeline where the circulation pump 25 is located, and the fourth pressure gauge and the fourth flow meter are used to read the pressure and flow rate of hydrogen entering the ejector from the second branch 23. By comparing the readings of the various pressure gauges and flow meters under parallel and series conditions, the performance of the hydrogen fuel cell under parallel and series conditions can be compared.

[0035] like Figure 1 As shown, in the technical solution of this embodiment, the main circuit pipeline assembly 20 further includes a first valve 27, which is arranged on the second branch 23. When the first interface 261 and the second interface 262 are opened and the third interface 263 is closed, the first valve 27 is opened, and part of the hydrogen flows into the first branch 22, and the rest flows into the second branch 23, thereby realizing the parallel connection of the circulation pump and the ejector. When the first interface 261 and the third interface 263 are opened and the second interface 262 is closed, the first valve 27 is closed, and hydrogen enters the main air intake pipeline 11 along the first branch 22. The setting of the first valve 27 avoids the problem of hydrogen flowing into the second branch 23, which leads to hydrogen waste and inaccurate measurement results.

[0036] like Figure 1As shown, in the technical solution of this embodiment, the gas-water separation structure 24 includes a gas-water separator 241, an exhaust pipeline 242, and a drain pipeline 243. The gas-water separator 241 is arranged on the main circuit pipeline 21, and the exhaust pipeline 242 and the drain pipeline 243 are both connected to the gas-water separator 241. The gas after the positive electrode reaction is passed through the main circuit pipeline 21 into the gas-water separator 241, where the hydrogen and water in the gas are separated. The separated hydrogen is passed through the main circuit pipeline 21 into the first branch and the second branch. The drain pipeline 243 is used to discharge the separated water out of the gas-water separator 241. The drain pipeline 243 is provided with a solenoid valve, which is opened at a fixed time to discharge the water in the drain pipeline 243. The exhaust pipeline 242 is provided with a first safety valve. When the air pressure in the exhaust pipeline 242 is too high, the first safety valve opens to exhaust the gas, thereby preventing the gas-water separator 241 from malfunctioning due to excessive air pressure.

[0037] like Figure 1 As shown, in the technical solution of this embodiment, the end of the exhaust pipe 242 away from the gas-water separator 241 is connected to the end of the drain pipe 243 away from the gas-water separator 241. The exhaust pipe 242 and the drain pipe 243 discharge excess hydrogen and water together and discharge them through the anode exhaust pipe to prevent gas or water from being retained in the entire device.

[0038] like Figure 1 As shown, in the technical solution of this embodiment, the main air intake pipeline assembly 10 also includes an air supply structure 13, which includes a gas source 131, a gas supply pipeline 132, and a second valve 133. The second valve 133 is arranged on the gas supply pipeline 132. The first end of the gas supply pipeline 132 is connected to the gas source 131, and the second end of the gas supply pipeline 132 is connected to the ejector 12. The second valve 133 is opened to allow hydrogen to enter the ejector 12 from the gas supply pipeline 132 to participate in the reaction. The second valve 133 is closed to stop the introduction of hydrogen. The second valve 133 uses a proportional valve. By rotating the second valve 133, the opening of the second valve 133 is changed to control the volume of hydrogen introduced into the ejector 12. The opening of the second valve 133 is controlled according to the readings at the first pressure gauge and the first flow meter to ensure that the volume of hydrogen introduced into the anode meets the experimental requirements.

[0039] like Figure 1 As shown, in the technical solution of this embodiment, the main intake pipeline assembly 10 also includes a third branch 14 and a third valve 15. The first end of the third branch 14 is connected to the main intake pipeline 11. The third valve 15 is arranged on the third branch 14, and the second end of the third branch 14 is connected to the exhaust pipeline 242. The third valve 15 is a second safety valve. When the pressure in the main loop pipeline 21 is too high, the third valve 15 opens to discharge excess hydrogen. The arrangement of the third branch 14 and the third valve 15 prevents problems such as excessive pressure in the main intake pipeline 11 causing cracks in the pipe wall.

[0040] like Figure 2 and Figure 3 As shown, in the technical solution of this embodiment, the hydrogen fuel cell testing equipment also includes a mounting frame assembly 30, to which the main air intake pipe assembly 10 and the main loop pipe assembly 20 are both connected. The mounting frame assembly 30 is used to secure the battery to be tested, the main air intake pipe assembly 10, and the main loop pipe assembly 20 to prevent these components from shaking during testing, which could lead to inaccurate measurement results.

[0041] like Figure 2 and Figure 3 As shown, in the technical solution of this embodiment, the mounting frame assembly 30 includes a frame structure 31 and a mounting portion 32. The mounting portion 32 is movably connected to the frame structure 31, and the ejector 12, the gas-water separation structure 24, and the circulating pump 25 are all fixed on the mounting portion 32. The mounting portion 32 includes multiple mounting portions 32, each of which is movably connected to the frame structure 31. The distance between each mounting portion 32 is adjustable, which facilitates the reasonable arrangement of the positions of the above-mentioned components and the positions of the pipelines, realizes the reasonable layout of each part, and is suitable for fixing components of different models. The frame structure 31 includes a frame and universal wheels. The universal wheels are arranged at the bottom of the frame. The mounting portion 32 is movably connected to the frame, which facilitates the staff to move the frame to the appropriate position.

[0042] like Figure 2 and Figure 3 As shown, in the technical solution of this embodiment, the frame structure 31 has an elongated hole 311, and a fastener is inserted between the mounting portion 32 and the elongated hole 311. The fastener is loosened to adjust the relative position of the mounting portion 32 and the frame structure 31, and the fastener is tightened to fix the position of the mounting portion 32. After adjusting the positions of multiple mounting portions 32, the various pipelines, ejector 12, circulating pump 25, etc. are then fixed to the appropriate mounting portion 32. This method of adjusting the mounting portion 32 using the elongated hole and fastener is simple to operate, easy to manufacture, and low in cost.

[0043] like Figure 4As shown, according to another aspect of the present application, a hydrogen fuel cell simulation system is also provided. The hydrogen fuel cell simulation system adopts the hydrogen fuel cell testing equipment mentioned above in the right. The hydrogen fuel cell simulation system includes: a first simulation pipeline structure 41, a hydrogen storage container 42 and a second simulation pipeline structure 43. The first end of the first simulation pipeline structure 41 is connected to the main loop pipeline 21, the second end of the first simulation pipeline structure 41 is connected to the hydrogen storage container 42, the first end of the second simulation pipeline structure 43 is connected to the hydrogen storage container 42, and the second end of the second simulation pipeline structure 43 is connected to the main intake pipeline 11. The first simulation pipeline structure 41 is provided with a flow controller, a first throttle valve and a first one-way valve, the second simulation pipeline structure 43 is provided with a second throttle valve and a second one-way valve, and the hydrogen storage container 42 is a high-pressure container for temporarily storing a large amount of hydrogen. The first simulation pipeline structure 41, the hydrogen storage container 42 and the second simulation pipeline structure 43 work together to simulate the cavity, hydrogen consumption and flow resistance of the fuel cell stack. During the test, a hydrogen fuel cell simulation system is used to replace the fuel cell stack for testing to avoid excessive loss of the fuel cell stack during the test, affecting the service life and saving testing costs.

[0044] In summary, the present application provides a movable and adjustable hydrogen fuel cell hydrogen subsystem test fixture (mounting frame assembly 30), including right-angle connectors, aluminum profiles, universal wheels, T-bolts (fasteners), and flange nuts. The length of the aluminum profile can be cut according to the structural requirements of the BOP components to be measured, and the stand is fixed by right-angle connectors, T-bolts, and flange nuts, which is fast and stable. The upper part of the stand (frame structure 31) is distributed with aluminum profile fixing beams according to the BOP components to be fixed, and the fixing structure can be quickly adjusted to solve problems that arise during the test; for the testing of different BOP components, one stand can be used for multiple purposes by adjusting the aluminum profile fixing structure (mounting portion 32) above the stand; universal wheels are installed at the bottom of the fixing frame, and the stand can be moved as needed. The hydrogen subsystem module (hydrogen fuel cell test equipment) primarily consists of: a flow meter, a shutoff valve, a proportional valve, a pressure sensor, an ejector 12, a T-valve (three-way valve 26), a hydrogen circulation pump (circulation pump 25), a two-way valve (first valve 27), a gas-water separator (gas-water separator 241), a fuel cell stack, a dummy stack (hydrogen fuel cell simulation system), a tail valve, a drain valve, a safety valve, an anode drain pipe, a connecting silicone hose, and a hose clamp. Currently, the hydrogen circulation system of mainstream hydrogen fuel cell systems generally consists of: a combination valve or hydrogen inlet assembly + ejector + gas-water separator, a combination valve or hydrogen inlet assembly + ejector + gas-water separator + hydrogen circulation pump, or a combination valve or hydrogen inlet assembly + gas-water separator + hydrogen circulation pump. The present application can switch the series-parallel connection mode of the ejector 12 and the hydrogen circulation pump 25 by adjusting the T-valve, adjust the T-valve to connect the hydrogen circulation pump and the second interface 262 branch, and open the two-way valve to realize the parallel connection of the ejector 12 and the hydrogen circulation pump 25; adjust the T-valve to close the second interface 262 branch, and close the two-way valve to realize the series connection of the ejector and the hydrogen circulation pump; both series and parallel modes can measure the flow rate by a flow meter, and the parallel mode can measure the flow rate of the two branches separately by the flow meter, and the series mode can measure the total flow rate of the loop by the flow meter to realize the series and parallel performance comparison experiment of the ejector and the hydrogen circulation pump; at the same time, in order to avoid damage to the fuel cell stack during the debugging of the hydrogen subsystem, a separate dummy fuel cell stack module (hydrogen fuel cell simulation system) is designed to replace the real stack for testing, simulating the cavity, hydrogen consumption and flow resistance of the real stack. The flow resistance is adjustable and the hydrogen consumption can be controlled by a flow controller; the dummy fuel cell stack module mainly consists of: a flow controller, a throttle valve, a one-way valve, and a high-pressure container (hydrogen storage container 42). To prevent damage to the fuel cell stack during hydrogen subsystem commissioning, a dummy fuel cell module was used in place of the real stack for testing, simulating the chamber, hydrogen consumption, and flow resistance of the real stack. The volume of the high-pressure vessel matched that of the hydrogen path chamber. Flow resistance was simulated by adjusting the throttle valve, and hydrogen consumption was simulated by using a flow controller. This allowed the dummy stack to be substituted during testing of other BOP components, protecting the real stack while also meeting testing requirements. The hydrogen subsystem design includes reserved interfaces for water and air lines, enabling full stack testing.

[0045] Thus far, various embodiments of the present application have been described in detail. To avoid obscuring the concept of the present application, some details well known in the art have not been described. Based on the above description, those skilled in the art can fully understand how to implement the technical solutions of this application.

[0046] Although some specific embodiments of the present application have been described in detail through examples, those skilled in the art will understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present application. Those skilled in the art will understand that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present application. In particular, as long as there are no structural conflicts, the various technical features mentioned in the various embodiments may be combined in any manner.

Claims

1. A hydrogen fuel cell testing device, characterized in that: include: A main air intake pipeline assembly (10), the main air intake pipeline assembly (10) comprising a main air intake pipeline (11) and an ejector (12), the ejector (12) being arranged on the main air intake pipeline (11); A main circuit pipeline assembly (20), the main circuit pipeline assembly (20) comprising a main circuit pipeline (21), a first branch (22), a second branch (23), an air-water separation structure (24), a circulation pump (25) and a three-way valve (26); the air-water separation structure (24) is arranged on the main circuit pipeline (21); the first branch (22) and the second branch (23) are both connected to the air outlet end of the main circuit pipeline (21); the circulation pump (25) is arranged on the first branch (22); the three-way valve (26) comprises a first interface (261), a second interface (262) and a third interface (263); the first branch (22) is connected to the first interface (261); the second branch (23) is connected to the ejector (12); the second interface (262) is connected to the main air intake pipeline assembly (10); and the third interface (263) is connected to the second branch (23).

2. The hydrogen fuel cell testing device according to claim 1, characterized in that: The main circuit pipeline assembly (20) further comprises a first valve (27), wherein the first valve (27) is arranged on the second branch (23).

3. The hydrogen fuel cell testing device according to claim 1, characterized in that: The gas-water separation structure (24) comprises a gas-water separator (241), an exhaust pipeline (242) and a drainage pipeline (243); the gas-water separator (241) is arranged on the main loop pipeline (21); and the exhaust pipeline (242) and the drainage pipeline (243) are both connected to the gas-water separator (241).

4. The hydrogen fuel cell testing device according to claim 3, characterized in that: One end of the exhaust pipe (242) away from the gas-water separator (241) is connected to one end of the drainage pipe (243) away from the gas-water separator (241).

5. The hydrogen fuel cell testing equipment according to claim 1, characterized in that: The main air intake pipeline assembly (10) further includes an air supply structure (13), the air supply structure (13) including an air source (131), an air supply pipeline (132) and a second valve (133), the second valve (133) being arranged on the air supply pipeline (132), the first end of the air supply pipeline (132) being connected to the air source (131), and the second end of the air supply pipeline (132) being connected to the ejector (12).

6. The hydrogen fuel cell testing device according to claim 3, characterized in that: The main intake pipe assembly (10) further includes a third branch (14) and a third valve (15), wherein a first end of the third branch (14) is connected to the main intake pipe (11), the third valve (15) is arranged on the third branch (14), and a second end of the third branch (14) is connected to the exhaust pipe (242).

7. The hydrogen fuel cell testing device according to claim 1, characterized in that: The hydrogen fuel cell testing device further comprises a mounting frame assembly (30), and the main air intake pipeline assembly (10) and the main loop pipeline assembly (20) are both connected to the mounting frame assembly (30).

8. The hydrogen fuel cell testing device according to claim 7, characterized in that: The mounting frame assembly (30) comprises a frame structure (31) and a mounting portion (32), wherein the mounting portion (32) is movably connected to the frame structure (31), and the ejector (12), the gas-water separation structure (24) and the circulating pump (25) are all fixed on the mounting portion (32).

9. The hydrogen fuel cell testing device according to claim 8, characterized in that: The frame structure (31) has a long hole (311), and a fastener is provided between the mounting portion (32) and the long hole (311).

10. A hydrogen fuel cell simulation system, characterized in that: The hydrogen fuel cell simulation system adopts the hydrogen fuel cell test equipment described in any one of claims 1 to 9, and the hydrogen fuel cell simulation system includes: a first simulation pipeline structure (41), a hydrogen storage container (42) and a second simulation pipeline structure (43), the first end of the first simulation pipeline structure (41) is connected to the main loop pipeline (21), the second end of the first simulation pipeline structure (41) is connected to the hydrogen storage container (42), the first end of the second simulation pipeline structure (43) is connected to the hydrogen storage container (42), and the second end of the second simulation pipeline structure (43) is connected to the main intake pipeline (11).

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