Testing device

Abstract

The invention provides a testing device. Comprising a galvanic pile simulation unit, a gas-water separation unit and a gas circulation unit, the gas circulation unit comprises a gas inlet module and a backflow module which are used for installing a to-be-tested assembly, an inlet of the gas inlet module is used for introducing test gas, and a gas consumption simulation flow path and a humidification simulation flow path are both communicated with an outlet of the gas inlet module; the outlet of the backflow module is communicated with the gas inlet module, and the inlet of the backflow module is communicated with the gas outlet of the gas-water separation unit, so that the performance of the to-be-tested component is evaluated according to the difference value between the gas flow measured at the outlet of the humidifying simulation flow path and the preset reference flow. Through the technical scheme provided by the invention, the technical problem that the test result of the test device in the prior art is not consistent with the actual operation condition of the galvanic pile can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of testing devices, and in particular to a testing device. Background Art

[0002] At present, hydrogen fuel cells are devices that directly convert the chemical energy of hydrogen and oxygen into electrical energy. Their advantages include fast startup speed, high electrical efficiency, low noise and zero pollution. The fuel cell system is an electric power system assembly with the fuel cell stack as the core and the various subsystems integrated with each other. The hydrogen subsystem is one of the core components of the fuel cell system. It is usually composed of a hydrogen circulation pump, an ejector and a gas-water separator. The hydrogen subsystem can stabilize the hydrogen flow and pressure, realize the anode water management of the fuel cell stack and improve the hydrogen utilization rate.

[0003] However, in the testing process of the hydrogen subsystem and its components, in order to protect the fuel cell stack, in most cases the separate testing and joint debugging of the hydrogen components are not combined with the stack. This causes the debugging process to be inconsistent with the actual operating conditions of the stack, increasing the uncertainty of the debugging process. If the preliminary testing of the hydrogen components is combined with the debugging of the stack, there is a risk of damage to the stack, and the testing cost and risk are high. Summary of the invention

[0004] The main purpose of the present invention is to provide a testing device to solve the technical problem that the test results of the testing device in the prior art are inconsistent with the actual operating conditions of the fuel cell stack.

[0005] In order to achieve the above object, the present invention provides a testing device for testing the performance of a component to be tested, the testing device comprising:

[0006] A stack simulation unit, comprising a gas consumption simulation flow path for discharging the test gas and a humidification simulation flow path for humidifying the test gas, wherein the gas consumption simulation flow path and the humidification simulation flow path are arranged in parallel;

[0007] An air-water separation unit, wherein the inlet of the air-water separation unit is connected to the outlet of the humidification simulation flow path, and the air-water separation unit has a water outlet for draining water and an air outlet for exhausting air, so as to separate the test gas introduced by the humidification simulation flow path into a water flow flowing into the water outlet and an air flow flowing into the air outlet;

[0008] A gas circulation unit, comprising an air intake module and a reflux module for installing the component to be tested, the inlet of the air intake module is used to introduce the test gas, and the gas consumption simulation flow path and the humidification simulation flow path are both connected to the outlet of the air intake module; the outlet of the reflux module is connected to the air intake module, and the inlet of the reflux module is connected to the gas outlet of the gas-water separation unit, so as to evaluate the performance of the component to be tested according to the difference between the gas flow rate measured at the outlet of the humidification simulation flow path and the preset reference flow rate;

[0009] The component to be tested includes at least any one of a hydrogen injector, a proportional valve, an ejector and a hydrogen circulation pump.

[0010] Further, the component to be tested includes an air intake component to be tested and an air return component to be tested, the air intake component to be tested includes at least any one of a hydrogen injector, a proportional valve and an ejector, and the air return component to be tested includes at least any one of a hydrogen circulation pump and an ejector;

[0011] The air intake module includes an air intake branch and a converging air flow path for installing the air intake component to be tested, the inlet of the air intake branch is used to introduce the test gas, the outlet of the air intake branch is connected to the inlet of the converging air flow path, and the outlet of the converging air flow path is the outlet of the air intake module;

[0012] The return module comprises a return branch for installing the return air component to be tested, and the outlet of the return branch is used to communicate with the air intake module.

[0013] Furthermore, there are multiple intake branches, including a first intake branch and a second intake branch arranged in parallel, the first intake branch is used to install a hydrogen injector or a proportional valve; the second intake branch is used to install an ejector.

[0014] Furthermore, the air intake module further comprises:

[0015] A first switch valve is arranged at the inlet of the first intake branch, and the opening of the first switch valve is adjustable; and / or,

[0016] A second switch valve is arranged at the inlet of the second intake branch, and the opening degree of the second switch valve is adjustable; and / or,

[0017] The third air intake branch, the first air intake branch and the second air intake branch are both arranged in parallel with the third air intake branch; the third air intake branch is provided with a third switch valve with an adjustable opening.

[0018] Furthermore, the intake branch includes a first intake branch and a second intake branch arranged in parallel, the first intake branch is used to install a hydrogen injector or a proportional valve; the second intake branch is used to install an ejector; the return branch includes:

[0019] a first reflux branch, the inlet of the first reflux branch is connected to the gas outlet of the gas-water separation unit, the outlet of the first reflux branch is connected to the reflux inlet of the ejector installed on the second air inlet branch, and a fifth switch valve with an adjustable opening is arranged on the first reflux branch;

[0020] The second reflux branch is provided with a mounting portion for installing a hydrogen circulation pump, the inlet of the second reflux branch is connected with the outlet of the gas-water separation unit, the outlet of the second reflux branch is connected with the converging gas path, and the second reflux branch is provided with a sixth switch valve with an adjustable opening.

[0021] Furthermore, the return branch also includes:

[0022] A series branch, wherein a fourth switch valve is arranged on the series branch, one end of the series branch is connected to the gas outlet end of the first reflux branch, and the other end of the series branch is connected to the gas outlet end of the second reflux branch;

[0023] The seventh switch valve is arranged on the second return flow branch and is located between the converging flow path and the series flow branch.

[0024] Furthermore, the gas circulation unit also includes:

[0025] An intake pressure sensor is arranged on the converging flow path and between the inlet of the converging flow path and the outlet of the second return branch, and the intake pressure sensor is used to detect the pressure of the gas flowing through; and / or,

[0026] A first pressure sensor is disposed on the first reflux branch, and the first pressure sensor is used to detect the pressure of the outflow gas of the first reflux branch; and / or,

[0027] The second pressure sensor and the third pressure sensor are both arranged on the second return branch. The second pressure sensor is arranged between the mounting portion and the inlet of the second return branch, and the third pressure sensor is arranged between the mounting portion and the outlet of the second return branch.

[0028] Furthermore, a humidifier is provided on the humidification simulation flow path; the stack simulation unit also includes:

[0029] A flow meter is provided at the outlet of the humidification simulation flow path, and the flow meter is used to measure the gas flow at the outlet of the humidification simulation flow path; and / or,

[0030] a humidity sensor, arranged on the humidification simulation flow path and located between the humidifier and the outlet of the humidification simulation flow path, the humidity sensor being used to detect the humidity of the gas flowing through; and / or,

[0031] The humidification proportional valve is arranged on the humidification simulation flow path and is located between the humidifier and the outlet of the humidification simulation flow path. The opening of the humidification proportional valve can be adjusted.

[0032] Furthermore, the gas-water separation unit includes a gas-water separator, and the gas-water separation unit also includes:

[0033] A gas separation flow path and an outlet switch valve, wherein the inlet of the gas separation flow path is connected to the outlet of the gas-water separator, the inlet of the reflux module is connected to the outlet of the gas separation flow path, the outlet switch valve is arranged on the gas separation flow path, and the opening of the outlet switch valve is adjustable; and / or,

[0034] A liquid separation flow path, a liquid outlet switch valve and a liquid volume meter, wherein the inlet of the liquid separation flow path is connected to the water outlet of the gas-water separator, the outlet of the liquid separation flow path is connected to the liquid volume meter, and the liquid outlet switch valve is arranged on the liquid separation flow path; the liquid volume meter has a collecting chamber, and the detection end of the liquid volume meter is used to measure the liquid volume in the collecting chamber.

[0035] Further, the test gas includes hydrogen and nitrogen; and the test device also includes:

[0036] The gas supply unit comprises a hydrogen supply path and a nitrogen supply path; one end of the hydrogen supply path is connected to the hydrogen source, and the other end is connected to the inlet of the air intake module; one end of the nitrogen supply path is connected to the nitrogen source, and the other end is connected to the inlet of the air intake module;

[0037] Among them, a hydrogen supply switch valve is arranged on the hydrogen supply flow path, and a nitrogen supply switch valve is arranged on the nitrogen supply flow path. The openings of the hydrogen supply switch valve and the nitrogen supply switch valve can be adjusted.

[0038] Furthermore, the gas supply unit further includes a main gas outlet path, the outlet of the hydrogen supply path and the outlet of the nitrogen supply path are both connected to the inlet of the main gas outlet path, and the outlet of the main gas outlet path is connected to the inlet of the gas inlet module; the gas supply unit further includes:

[0039] A safety valve and a safety flow path, one end of the safety flow path is connected to the main gas outlet path, and the other end forms a safety gas port for exhaust, the safety valve is arranged on the safety flow path, and the opening of the safety valve is adjustable; and / or,

[0040] An exhaust valve and an exhaust flow path, one end of the exhaust flow path is connected to the main exhaust flow path, and the other end forms an exhaust air port for exhausting air, the exhaust valve is arranged on the exhaust flow path, and the opening of the exhaust valve is adjustable; and / or,

[0041] The gas supply pressure sensor is arranged on the main gas outlet path and is used to detect the pressure of the gas flowing through.

[0042] Furthermore, the testing device further comprises a gas supply unit; the testing device further comprises:

[0043] The preheating unit includes a preheating flow path and a non-preheating flow path. The inlet of the preheating flow path can be selectively connected to the outlet of the gas supply unit, and the outlet of the preheating flow path is connected to the inlet of the air intake module. A preheater for heating the gas flowing through is provided on the preheating flow path; the inlet of the non-preheating flow path can be selectively connected to the outlet of the gas supply unit, and the outlet of the non-preheating flow path is connected to the inlet of the air intake module.

[0044] Furthermore, the test device further includes an exhaust gas emission unit, the exhaust gas emission unit includes an exhaust gas emission flow path, the inlet of the exhaust gas emission flow path is connected to the outlet of the gas consumption simulation flow path, and the exhaust gas emission unit further includes:

[0045] An exhaust gas pressure sensor is arranged on the exhaust gas flow path, and the exhaust gas pressure sensor is used to detect the gas pressure in the exhaust gas flow path; and / or,

[0046] a hydrogen concentration sensor, arranged in the exhaust gas flow path, the hydrogen concentration sensor is used to detect the hydrogen concentration of the gas in the exhaust gas flow path; and / or,

[0047] The condenser and the gas-water separator are both arranged on the tail gas discharge flow path. The condenser is located on the side of the gas-water separator close to the inlet of the tail gas discharge flow path. The gas-water separator has a gas tail discharge port for exhaust and a liquid tail discharge port for liquid discharge.

[0048] By applying the technical solution of the present invention, different components to be tested can be installed through the setting of the air intake module, and through the setting of the stack simulation unit and the gas-water separation unit, the test gas transported through the component to be tested can simulate the gas reaction consumption of the actual fuel cell stack and the humidity increase under the influence of the generated reaction water, and then it can be judged whether the working performance of the component to be tested is qualified according to the flow rate of the test gas at the outlet of the stack simulation unit, thereby improving the accuracy of the test results of the test device when testing the hydrogen subsystem and its components of the hydrogen fuel cell system, so that the test results are consistent with the actual operating conditions of the stack. By setting the gas consumption simulation flow path and the humidification simulation flow path, the risks and costs that may be caused by directly using the fuel cell stack for testing are avoided, while ensuring the reliability and safety of the test results. Therefore, the technical problem that the test results of the test device in the prior art are inconsistent with the actual operating conditions of the stack can be solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0050] Figure 1A schematic diagram of a structural module of a testing device provided in an embodiment of the present invention is shown;

[0051] Figure 2 A partial structural schematic diagram of a testing device provided according to an embodiment of the present invention is shown;

[0052] Figure 3 A schematic structural diagram of a gas supply unit of a testing device provided in an embodiment of the present invention is shown;

[0053] Figure 4 A schematic structural diagram of a preheating unit of a testing device provided according to an embodiment of the present invention is shown;

[0054] Figure 5 A schematic structural diagram of a gas circulation unit of a testing device provided in an embodiment of the present invention is shown;

[0055] Figure 6 A schematic diagram of the structure of a battery stack simulation unit of a test device provided in an embodiment of the present invention is shown;

[0056] Figure 7 A schematic structural diagram of a gas-water separation unit of a testing device provided according to an embodiment of the present invention is shown;

[0057] Figure 8 A schematic structural diagram of an exhaust emission unit of a testing device provided according to an embodiment of the present invention is shown.

[0058] The above drawings include the following reference numerals:

[0059] 1. Gas supply unit; 11. Hydrogen supply flow path; 111. Hydrogen supply switch valve; 112. Hydrogen filter; 113. Hydrogen supply pressure reducing valve; 114. Hydrogen supply solenoid valve; 115. Hydrogen supply flow meter; 116. Hydrogen supply check valve; 12. Nitrogen supply flow path; 121. Nitrogen supply switch valve; 122. Nitrogen filter; 123. Nitrogen supply pressure reducing valve; 124. Nitrogen supply solenoid valve; 125. Nitrogen supply flow meter; 126. Nitrogen supply check valve; 13. Main outlet flow path; 131. Safety valve; 132. Safety flow path; 133. Drain valve; 134. Drain flow path; 135. Gas supply temperature sensor; 136. Gas supply pressure sensor;

[0060] 2. Preheating unit; 21. Preheating flow path; 211. Preheater; 212. Water pump; 213. Electric heater; 214. Preheating flow meter; 215. First preheating temperature sensor; 216. Second preheating temperature sensor; 22. Non-preheating flow path; 23. Three-way valve;

[0061] 3. Gas circulation unit; 301. Air intake module; 31. First air intake branch; 311. Hydrogen injector; 312. First switch valve; 32. Second air intake branch; 321. Ejector; 322. Second switch valve; 33. Converging gas flow path; 331. Air intake pressure sensor; 332. Air intake temperature sensor; 302. Reflow module; 34. First reflow branch; 341. Fifth switch valve; 342. First pressure sensor; 343. First temperature sensor; 35. Second reflow branch; 351. Hydrogen circulation pump; 352. Sixth switch valve; 353. Seventh switch valve; 354. Second pressure sensor; 355. Third pressure sensor; 356. Second temperature sensor; 357. Third temperature sensor; 36. Third air intake branch; 361. Third switch valve; 37. Series branch; 371. Fourth switch valve; 38. Air intake main flow path;

[0062] 4. Stack simulation unit; 41. Gas consumption simulation flow path; 411. Exhaust port; 412. Exhaust switch valve; 413. Exhaust proportional valve; 42. Humidification simulation flow path; 421. Humidifier; 4211. Water tank; 422. Humidity sensor; 423. Flow meter; 424. Humidification proportional valve; 425. Stack simulation safety valve;

[0063] 5. Gas-water separation unit; 51. Gas-water separator; 511. Water outlet; 512. Gas outlet; 52. Gas separation flow path; 521. Gas outlet switch valve; 53. Liquid separation flow path; 531. Liquid outlet switch valve; 532. Liquid volume meter;

[0064] 6. Exhaust gas emission unit; 61. Exhaust gas emission flow path; 611. Exhaust gas pressure sensor; 612. Hydrogen concentration sensor; 613. Condenser; 614. Gas-water separation element; 6141. Gas exhaust outlet; 6142. Liquid exhaust outlet; 615. Exhaust gas temperature sensor; 7. Hydrogen concentration detection unit. DETAILED DESCRIPTION

[0065] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0066] like Figures 1 to 8As shown, an embodiment of the present invention provides a test device, which is used to test the performance of a component to be tested, and the test device includes a stack simulation unit 4, a gas-water separation unit 5, and a gas circulation unit 3. The stack simulation unit 4 includes a gas consumption simulation flow path 41 for discharging the test gas and a humidification simulation flow path 42 for humidifying the test gas, and the gas consumption simulation flow path 41 and the humidification simulation flow path 42 are arranged in parallel. The inlet of the gas-water separation unit 5 is connected to the outlet of the humidification simulation flow path 42, and the gas-water separation unit 5 has a water outlet 511 for draining water and an air outlet 512 for exhausting air, so as to separate the test gas introduced by the humidification simulation flow path 42 into a water flow flowing into the water outlet 511 and an air flow flowing into the air outlet 512. The gas circulation unit 3 includes an intake module 301 and a reflux module 302 for installing the component to be tested. The inlet of the intake module 301 is used to introduce the test gas. The gas consumption simulation flow path 41 and the humidification simulation flow path 42 are both connected to the outlet of the intake module 301; the outlet of the reflux module 302 is connected to the intake module 301, and the inlet of the reflux module 302 is connected to the gas outlet 512 of the gas-water separation unit 5, so as to evaluate the performance of the component to be tested according to the difference between the gas flow measured at the outlet of the humidification simulation flow path 42 and the preset reference flow. Among them, the component to be tested includes at least any one of the hydrogen injector 311, the proportional valve, the ejector 321 and the hydrogen circulation pump 351.

[0067] By using the test device provided by the embodiment of the present invention, different components to be tested can be installed through the setting of the air intake module 301, and through the setting of the stack simulation unit 4 and the gas-water separation unit 5, the test gas delivered through the component to be tested can simulate the gas reaction consumption of the actual fuel cell stack and the humidity increase under the influence of the generated reaction water, and then it can be judged whether the working performance of the component to be tested is qualified according to the flow size of the test gas at the outlet of the stack simulation unit 4, thereby improving the accuracy of the test results of the test device in testing the hydrogen subsystem and its components of the hydrogen fuel cell system. By setting the gas consumption simulation flow path 41 and the humidification simulation flow path 42, the risks and costs that may be caused by directly using the fuel cell stack for testing are avoided, while ensuring the reliability and safety of the test results. Therefore, the test device provided by this embodiment can solve the technical problem that the test results of the test device in the prior art are inconsistent with the actual operating conditions of the stack.

[0068] It should be noted that when the difference between the gas flow rate at the outlet of the humidification simulation flow path 42 and the preset reference flow rate is within the preset range, the performance of the component to be tested can be considered qualified. Before measuring the gas flow rate at the outlet of the humidification simulation flow path 42, the flow rate of the test gas introduced at the inlet of the air intake module 301 needs to be adjusted to the preset flow rate, and the gas pressure at the outlet of the air intake module 301 needs to be adjusted to the preset pressure.

[0069] It should be noted that the hydrogen injector 311 and the hydrogen circulation pump 351 can act not only on hydrogen but also on other gases.

[0070] Specifically, the component to be tested includes an air intake component to be tested and an air return component to be tested, the air intake component to be tested includes at least any one of a hydrogen injector 311, a proportional valve and an ejector 321, and the air return component to be tested includes at least any one of a hydrogen circulation pump 351 and an ejector 321. The air intake module 301 includes an air intake branch and a converging flow path 33 for installing the air intake component to be tested, the inlet of the air intake branch is used to introduce the test gas, the outlet of the air intake branch is connected to the inlet of the converging flow path 33, and the outlet of the converging flow path 33 is the outlet of the air intake module 301. The air intake module 301 also includes a return module 302 including a return branch for installing the air return component to be tested, and the outlet of the return branch is used to communicate with the air intake module 301. By adopting such a structural setting, the component to be tested is divided into an air intake component to be tested and an air return component to be tested, and an air intake branch and a return branch are set in coordination. The adaptability test between the air intake component to be tested and the air return component to be tested can be achieved through the connectivity between the air intake branch and the return branch, thereby obtaining more accurate test results.

[0071] Specifically, there are multiple intake branches, including a first intake branch 31 and a second intake branch 32 arranged in parallel, wherein the first intake branch 31 is used to install a hydrogen injector 311 or a proportional valve; and the second intake branch 32 is used to install an ejector 321. With such a structural arrangement, the parallel arrangement of the first intake branch 31 and the second intake branch 32 not only increases the flexibility of the test device, but also improves the compatibility with different components. The first intake branch 31 can be installed with a hydrogen injector 311 or a proportional valve, while the second intake branch 32 can be installed with an ejector 321. This design allows the test device to test different types of hydrogen components simultaneously or independently, improves the test efficiency, and provides convenience for the comprehensive evaluation of the adaptability and performance of different components.

[0072] Specifically, the air intake module 301 further includes a first switch valve 312, which is arranged at the inlet of the first air intake branch 31, and the opening of the first switch valve 312 is adjustable. With such a structural arrangement, it is possible to adjust whether the component to be tested installed on the first air intake branch 31 participates in the test by changing the opening of the first switch valve 312 according to the test needs, thereby effectively improving the flexibility of the test.

[0073] Specifically, the air intake module 301 further includes a second switch valve 322, which is arranged at the inlet of the second air intake branch 32, and the opening of the second switch valve 322 is adjustable. With such a structural arrangement, it is possible to adjust whether the component to be tested installed on the second air intake branch 32 participates in the test by changing the opening of the second switch valve 322 according to the test needs, thereby effectively improving the flexibility of the test.

[0074] Specifically, the air intake module 301 also includes a third air intake branch 36, and the first air intake branch 31 and the second air intake branch 32 are both arranged in parallel with the third air intake branch 36. The third air intake branch 36 is provided with a third switch valve 361 with an adjustable opening. With such a structural arrangement, the introduction of the third air intake branch 36, together with the parallel arrangement of the first air intake branch 31 and the second air intake branch 32, provides additional test flexibility and scalability. Through the adjustable opening of the third switch valve 361, the test device can control whether to transmit the test gas to the stack simulation unit 4 only through the third air intake branch 36, thereby increasing the gas supply mode of the test device, thereby facilitating the separate testing of the return air assembly to be tested and other structural components such as the gas-water separator 51, thereby improving the test efficiency and the comprehensiveness of the component evaluation.

[0075] Specifically, the intake branch includes a first intake branch 31 and a second intake branch 32 arranged in parallel, the first intake branch 31 is used to install a hydrogen injector 311 or a proportional valve; the second intake branch 32 is used to install an ejector 321; the reflux branch includes a first reflux branch 34 and a second reflux branch 35. The inlet of the first reflux branch 34 is connected to the gas outlet 512 of the gas-water separation unit 5, the outlet of the first reflux branch 34 is connected to the reflux inlet of the ejector 321 installed on the second intake branch 32, and the first reflux branch 34 is provided with a fifth switch valve 341 with an adjustable opening. The second reflux branch 35 is provided with a mounting portion for mounting a hydrogen circulation pump 351, the inlet of the second reflux branch 35 is communicated with the gas outlet 512 of the gas-water separation unit 5, the outlet of the second reflux branch 35 is communicated with the converging gas path 33, and the sixth switch valve 352 with an adjustable opening is provided on the second reflux branch 35. With such a structural arrangement, the test device can test the hydrogen injector 311 and the ejector 321 respectively through the first intake branch 31 and the second intake branch 32 arranged in parallel, thereby improving the flexibility and efficiency of the test.

[0076] In this embodiment, the reflux branch also includes a series branch 37, on which a fourth switch valve 371 is provided, one end of the series branch 37 is connected to the gas outlet end of the first reflux branch 34, and the other end is connected to the gas outlet end of the second reflux branch 35. The reflux branch also includes a seventh switch valve 353, which is provided on the second reflux branch 35 and is located between the converging gas path 33 and the series branch 37. With such a structural arrangement, the design of the series branch 37, together with the fourth switch valve 371 and the seventh switch valve 353, provides a flexible test mode, which can establish a connection between the first reflux branch 34 and the second reflux branch 35, and realize the series hydrogen return mode test of the hydrogen circulation pump and the ejector 321. By adjusting the fourth switch valve 371 and the seventh switch valve 353, the distribution of gas between the two reflux branches can be controlled, so as to evaluate the matching state of the hydrogen circulation pump and the ejector 321 in the series hydrogen return mode. In addition, this design allows different working conditions to be simulated during the test, improving the comprehensiveness and reliability of the test.

[0077] Specifically, the gas circulation unit 3 further includes an intake pressure sensor 331, which is arranged on the confluence flow path 33 and between the inlet of the confluence flow path 33 and the outlet of the second reflux branch 35, and is used to detect the pressure of the gas flowing through. With such a structural arrangement, the inlet pressure sensor 331 can measure the inlet pressure of the test gas before entering the stack simulation unit 4, so that it is convenient to compare the measured inlet pressure with the preset inlet pressure to determine whether the gas flow at the outlet of the humidification simulation flow path 42 can be detected.

[0078] Specifically, the gas circulation unit 3 further includes a first pressure sensor 342, which is arranged on the first reflux branch 34, and is used to detect the pressure of the outflow gas of the first reflux branch 34. With such a structural arrangement, the first pressure sensor 342 is installed on the first reflux branch 34, and is used to detect the pressure of the gas before being discharged from the gas-water separation unit 5 to the reflux inlet of the ejector 321. In this way, when testing the case where the ejector 321 is involved, the simulated stack outlet pressure can be measured by the first pressure sensor 342, so that it is convenient to compare the measured simulated stack outlet pressure with the preset stack outlet pressure to determine whether the gas flow at the outlet of the humidification simulation flow path 42 can be detected.

[0079] Specifically, the gas circulation unit 3 further includes a second pressure sensor 354 and a third pressure sensor 355, both of which are arranged on the second reflux branch 35, the second pressure sensor 354 is arranged between the mounting portion and the inlet of the second reflux branch 35, and the third pressure sensor 355 is arranged between the mounting portion and the outlet of the second reflux branch 35. With such a structural arrangement, the second pressure sensor 354 is located between the mounting portion (for mounting the hydrogen circulation pump 351) and the inlet of the second reflux branch 35, and the third pressure sensor 355 is located between the mounting portion and the outlet of the second reflux branch 35. The arrangement of these sensors allows the test device to monitor the gas pressure changes at the inlet and outlet of the hydrogen circulation pump 351, which is essential for evaluating the working efficiency, reflux capacity and series-parallel performance of the hydrogen circulation pump 351. By comparing the data of the second pressure sensor 354 and the third pressure sensor 355, the tester can analyze the pressure regulation effect of the hydrogen circulation pump 351 on the gas during the reflux process, as well as its compatibility with other components.

[0080] In this embodiment, a humidifier 421 is provided on the humidification simulation flow path 42; the stack simulation unit 4 further includes a flow meter 423, which is provided at the outlet of the humidification simulation flow path 42, and is used to measure the gas flow at the outlet of the humidification simulation flow path 42. With such a structural arrangement, the flow meter 423 is installed at the outlet of the humidification simulation flow path 42, and can accurately measure the gas flow at the outlet of the humidification simulation flow path 42, and then can evaluate the working performance of the component to be tested according to the comparison between the measured gas flow and the preset reference flow.

[0081] Specifically, the stack simulation unit 4 further includes a humidity sensor 422, which is arranged on the humidification simulation flow path 42 and between the humidifier 421 and the outlet of the humidification simulation flow path 42, and the humidity sensor 422 is used to detect the humidity of the gas flowing through. With such a structural arrangement, the humidity sensor 422 is located between the humidifier 421 and the outlet of the humidification simulation flow path 42, and can detect the humidity of the gas after passing through the humidifier 421 in real time.

[0082] Specifically, the stack simulation unit 4 further includes a humidification proportional valve 424, which is arranged on the humidification simulation flow path 42 and between the humidifier 421 and the outlet of the humidification simulation flow path 42, and the opening of the humidification proportional valve 424 is adjustable. With such a structural setting, the flow rate and pressure of the reflux gas flowing out of the humidification simulation flow path 42 can be adjusted by adjusting the opening of the humidification proportional valve 424, so as to simulate the flow resistance of the stack, thereby facilitating the test to be adjusted to adapt to different working conditions.

[0083] In this embodiment, an exhaust switch valve 412 and an exhaust proportional valve 413 with adjustable opening are provided on the gas consumption simulation flow path 41. The exhaust switch valve 412 is a valve used to open or close the gas consumption simulation flow path 41. When it is necessary to simulate the consumption of gas by the fuel cell, open this valve to allow gas to pass. When gas consumption is not required or when testing other working conditions, close this valve to cut off the flow of gas. The exhaust proportional valve 413 is a valve that can continuously adjust the opening, which is used to control the gas flow in the gas consumption simulation flow path 41. By adjusting its opening, the gas consumption of the fuel cell under different working conditions can be simulated, thereby testing the performance of hydrogen components under different airflow conditions.

[0084] In this embodiment, the gas-water separation unit 5 includes a gas-water separator 51, and the gas-water separation unit 5 also includes a gas separation flow path 52 and a gas outlet switch valve 521. The inlet of the gas separation flow path 52 is connected to the gas outlet of the gas-water separator 51, the inlet of the reflux module 302 is connected to the outlet of the gas separation flow path 52, and the gas outlet switch valve 521 is arranged on the gas separation flow path 52, and the opening of the gas outlet switch valve 521 is adjustable. With such a structural setting, the adjustable opening design of the gas outlet switch valve 521 enables the tester to control the flow of the separated gas, ensure the comprehensiveness and accuracy of the test results, and also provide data support for the optimization design of the hydrogen subsystem.

[0085] Specifically, the gas-water separation unit 5 also includes a liquid separation flow path 53, a liquid outlet switch valve 531 and a liquid volume meter 532. The inlet of the liquid separation flow path 53 is connected to the water outlet of the gas-water separator 51, and the outlet of the liquid separation flow path 53 is connected to the liquid volume meter 532. The liquid outlet switch valve 531 is arranged on the liquid separation flow path 53; the liquid volume meter 532 has a collection chamber, and the detection end of the liquid volume meter 532 is used to measure the liquid volume in the collection chamber. In this way, the setting of the liquid outlet switch valve 531 allows the tester to control the discharge of the liquid, which is very important for the safety during the test and the controllability of the experiment. The liquid volume meter 532 can accurately measure the collected liquid volume, which is the key data for evaluating the separation efficiency of the gas-water separation unit 5. By measuring the volume of the collection chamber, the tester can understand the ability of the gas-water separator 51 to separate liquid water under different working conditions, which is very important for evaluating the gas-water separation ability of the gas-water separator 51.

[0086] Specifically, the test gas includes hydrogen and nitrogen; the test device also includes a gas supply unit 1, and the gas supply unit 1 includes a hydrogen supply path 11 and a nitrogen supply path 12; one end of the hydrogen supply path 11 is connected to the hydrogen source, and the other end is connected to the inlet of the air intake module 301; one end of the nitrogen supply path 12 is connected to the nitrogen source, and the other end is connected to the inlet of the air intake module 301. Among them, a hydrogen supply switch valve 111 is provided on the hydrogen supply path 11, and a nitrogen supply switch valve 121 is provided on the nitrogen supply path 12, and the openings of the hydrogen supply switch valve 111 and the nitrogen supply switch valve 121 can be adjusted. With such a structural setting, the setting of the hydrogen supply path 11 and the nitrogen supply path 12 respectively selects the experimental gas through the hydrogen supply switch valve 111 and the nitrogen supply switch valve 121, allowing the test device to flexibly switch the gas type, thereby realizing performance testing under different gases. This design improves the flexibility and efficiency of testing, as hydrogen is the fuel for fuel cell operation, while nitrogen can be used for purge and safety testing, ensuring system safety and comprehensiveness of experiments during testing.

[0087] Specifically, the gas supply unit 1 also includes a main gas outlet path 13, the outlet of the hydrogen supply path 11 and the outlet of the nitrogen supply path 12 are both connected to the inlet of the main gas outlet path 13, and the outlet of the main gas outlet path 13 is connected to the inlet of the air intake module 301. The gas supply unit 1 also includes a safety valve 131 and a safety flow path 132, one end of the safety flow path 132 is connected to the main gas outlet path 13, and the other end forms a safety gas port for exhaust, and the safety valve 131 is arranged on the safety flow path 132, and the opening of the safety valve 131 can be adjusted. With such a structural arrangement, the safety valve 131 arranged on the safety flow path 132 can automatically open when the internal pressure of the test device increases abnormally, release excess gas, ensure the safe operation of the test device, and prevent overpressure from causing damage to the system or personnel.

[0088] Specifically, the gas supply unit 1 also includes a main gas outlet path 13, the outlet of the hydrogen supply path 11 and the outlet of the nitrogen supply path 12 are both connected to the inlet of the main gas outlet path 13, and the outlet of the main gas outlet path 13 is connected to the inlet of the air intake module 301. The gas supply unit 1 also includes an exhaust valve 133 and an exhaust path 134, one end of the exhaust path 134 is connected to the main gas outlet path 13, and the other end forms an exhaust port for exhaust, and the exhaust valve 133 is arranged on the exhaust path 134, and the opening of the exhaust valve 133 is adjustable. With such a structural arrangement, the exhaust path 134 allows the tester to control the discharge of the gas inside the test device through the arrangement of the exhaust valve 133, which is very important for system debugging, troubleshooting or pipeline replacement when testing gas replacement.

[0089] Specifically, the exhaust valve 133 is a solenoid valve.

[0090] Specifically, the gas supply unit 1 also includes a main gas outlet path 13, the outlet of the hydrogen supply path 11 and the outlet of the nitrogen supply path 12 are both connected to the inlet of the main gas outlet path 13, and the outlet of the main gas outlet path 13 is connected to the inlet of the air intake module 301. The gas supply unit 1 also includes a gas supply pressure sensor 136, which is arranged on the main gas outlet path 13, and the gas supply pressure sensor 136 is used to detect the pressure of the gas flowing through. With such a structural arrangement, the arrangement of the gas supply pressure sensor 136 can monitor the gas pressure on the main gas outlet path 13 in real time, so that the gas supply pressure can be adjusted to the standard pressure required for the preset working condition according to the detection condition of the gas supply pressure sensor 136.

[0091] In this embodiment, the test device further includes a gas supply unit 1; the test device further includes a preheating unit 2, the preheating unit 2 includes a preheating flow path 21 and a non-preheating flow path 22, the inlet of the preheating flow path 21 can be selectively connected to the outlet of the gas supply unit 1, the outlet of the preheating flow path 21 is connected to the inlet of the air intake module 301, and a preheater 211 for heating the gas flowing through is provided on the preheating flow path 21; the inlet of the non-preheating flow path 22 can be selectively connected to the outlet of the gas supply unit 1, and the outlet of the non-preheating flow path 22 is connected to the inlet of the air intake module 301. With such a structural setting, it is possible to flexibly select whether to preheat the gas flowing through according to the test requirements. The preheater 211 on the preheating flow path 21 can heat the gas to a specific temperature to simulate the hydrogen preheating scenario of a hydrogen fuel cell, which is very important for evaluating the performance of the hydrogen management component at the actual working temperature. The non-preheating flow path 22 provides a path for testing without preheating, which helps to evaluate the sensitivity of components to temperature changes or performance under low temperature conditions. By switching between the preheating flow path 21 and the non-preheating flow path 22, the test device can simulate different temperature conditions, improve the comprehensiveness of the test and the reliability of the data, and help optimize the design of the hydrogen subsystem and improve its adaptability under various environmental conditions.

[0092] Specifically, the test device further includes an exhaust gas emission unit 6, which includes an exhaust gas emission flow path 61, the inlet of the exhaust gas emission flow path 61 is connected to the outlet of the gas consumption simulation flow path 41, and the exhaust gas emission unit 6 also includes an exhaust gas pressure sensor 611, which is arranged on the exhaust gas emission flow path 61, and the exhaust gas pressure sensor 611 is used to detect the gas pressure in the exhaust gas emission flow path 61. With such a structural arrangement, the exhaust gas pressure sensor 611 can monitor the pressure of the exhaust gas in real time, which helps to ensure the safety and controllability of the emission process of the test device. In addition, the exhaust gas pressure data is also of great value for analyzing the air tightness of the system, and is the basis for designing an efficient and safe emission system.

[0093] Specifically, the test device also includes an exhaust gas emission unit 6, which includes an exhaust gas emission flow path 61, the inlet of the exhaust gas emission flow path 61 is connected to the outlet of the gas consumption simulation flow path 41, and the exhaust gas emission unit 6 also includes a hydrogen concentration sensor 612, which is arranged on the exhaust gas emission flow path 61, and the hydrogen concentration sensor 612 is used to detect the hydrogen concentration of the gas in the exhaust gas emission flow path 61. With such a structural setting, the setting of the hydrogen concentration sensor 612 can monitor the hydrogen concentration in the exhaust gas in real time, which is crucial for the safe operation of the test device. During the test process, especially when it involves hydrogen circulation and consumption simulation, monitoring the hydrogen concentration helps to ensure that the exhaust gas does not cause safety hazards, such as preventing the hydrogen concentration from reaching the explosion limit.

[0094] Specifically, the test device also includes an exhaust gas emission unit 6, which includes an exhaust gas emission flow path 61, the inlet of the exhaust gas emission flow path 61 is connected to the outlet of the gas consumption simulation flow path 41, and the exhaust gas emission unit 6 also includes a condenser 613 and a gas-water separator 614, both of which are arranged on the exhaust gas emission flow path 61, and the condenser 613 is located on the side of the gas-water separator 614 close to the inlet of the exhaust gas emission flow path 61, and the gas-water separator 614 has a gas tail discharge port 6141 for exhaust and a liquid tail discharge port 6142 for discharging liquid. With such a structural arrangement, the condenser 613 can reduce the gas temperature and cause the water to condense into liquid, while the gas-water separator 614 further separates the liquid water and discharges it through the liquid tail discharge port 6142. The gas tail discharge port 6141 is used to discharge the treated gas, which improves the efficiency and safety of the discharge process.

[0095] In this embodiment, the testing device also includes a hydrogen concentration detection unit 7, which includes a plurality of hydrogen concentration sensors 612. Hydrogen concentration sensors 612 are correspondingly provided at the gas supply unit 1, the vent, and the component to be tested of the testing device. The hydrogen concentration sensor 612 is used to detect hydrogen leakage during the test to ensure the safety of the test process.

[0096] Specifically, the test conditions of the test device include the return air mode of the hydrogen circulation pump 351 combined with a proportional valve or the gas adjustment mode of the hydrogen injector 311, the return air mode of a single ejector 321 or the return air mode of a double ejector 321, the return air mode of the hydrogen circulation pump 351 and the ejector 321 in series or in parallel, the return air mode of the ejector 321 combined with a proportional valve, and a separate gas-water separator test mode.

[0097] In this embodiment, in the gas adjustment mode of the hydrogen circulation pump 351 return gas combined with the proportional valve or hydrogen injector 311, the proportional valve or hydrogen injector 311 to be tested is installed at the position to be tested (on the first intake branch 31), the first switch valve 312, the exhaust switch valve 412, the sixth switch valve 352 and the seventh switch valve 353 are in the open state, and the remaining switch valves are in the closed state. The test gas medium is selected by adjusting the hydrogen supply switch valve 111 and the nitrogen supply switch valve 121 of the gas supply unit 1, and the gas is made to flow through the preheating flow path 21 by adjusting the outlet of the three-way valve 23. The test gas passes through the first switch valve 312, the proportional valve or hydrogen injector 311 to be tested, the stack simulation unit 4, the gas-water separation unit 5 and the hydrogen circulation pump 351 to be tested, and then flows back to the inlet of the stack simulation unit 4. During this period, the liquid outlet switch valve 531 is periodically opened and closed to regularly discharge the separated liquid water.

[0098] Specifically, during the test, the main gas flow rate (measured by the hydrogen supply flowmeter 115 or the nitrogen supply flowmeter 125) can be adjusted by adjusting the operating duty cycle of the proportional valve or hydrogen injector 311 to be tested, and the gas reflux flow rate and pressure can be regulated by adjusting the opening of the exhaust proportional valve 413 and the humidification proportional valve 424. The simulated stack outlet pressure (measured by the second pressure sensor 354) and the inlet pressure (measured by the intake pressure sensor 331) are adjusted by controlling the opening of the humidification proportional valve 424 to achieve the target pressure difference. The flow rate of the reflux gas in the second reflux branch 35 can also be adjusted by adjusting the speed of the hydrogen circulation pump 351 to be tested, so as to comprehensively evaluate the compatibility of the single hydrogen circulation pump 351 with the proportional valve or hydrogen injector 311 and the working performance of the component monomer. Specifically, the working performance of the components to be tested and the adaptability between the components to be tested are evaluated by adjusting the main gas flow, the stack outlet pressure and the inlet pressure to the preset target parameters, and then simulating the difference between the stack outlet flow and the preset reference flow. The monomer working performance of the proportional valve or hydrogen injector 311 is evaluated by the flow rate (through the flow meter 423) of the proportional valve or hydrogen injector 311 at different openings under the specified working pressure. The monomer working performance of the hydrogen circulation pump 351 is evaluated by the relationship between its rotation speed, flow rate and pressure rise. The flow rate is measured by the flow meter 423, and the pressure rise is measured by the pressure sensors (the second pressure sensor 354 and the third pressure sensor 355) at the front and rear ends of the hydrogen circulation pump 351.

[0099] In this embodiment, in the single ejector 321 return gas mode or the double ejector 321 return gas mode, the second switch valve 322, the exhaust switch valve 412 and the fifth switch valve 341 are in the open state, and the remaining switch valves are in the closed state. The test gas medium is selected by adjusting the hydrogen supply switch valve 111 and the nitrogen supply switch valve 121 of the gas supply unit 1, and the gas is made to flow through the preheating flow path 21 by adjusting the outlet of the three-way valve 23. The test gas flows back to the reflux inlet of the ejector 321 to be tested after passing through the second switch valve 322, the ejector 321 to be tested, the stack simulation unit 4 and the gas-water separation unit 5 in turn, and the liquid outlet switch valve 531 is periodically opened and closed to regularly discharge the separated liquid water.

[0100] Specifically, during the test, the pressure of the ejector outlet can be adjusted by the proportional valve integrated inside the ejector 321 to be tested, and the gas reflux flow and pressure can be regulated by adjusting the opening of the exhaust proportional valve 413 and the humidification proportional valve 424. The simulated stack outlet pressure (measured by the first pressure sensor 342) and the inlet pressure (measured by the intake pressure sensor 331) are adjusted by controlling the opening of the humidification proportional valve 424 to achieve the target pressure difference, thereby measuring the reflux flow and ejection reflux ratio of the ejector 321 to be tested under experimental conditions, and comparing the measured flow data with the preset reference parameters to obtain the evaluation results of the working performance of the ejector 321.

[0101] In this embodiment, in the gas return mode in series or in parallel with the hydrogen circulation pump 351 and the ejector 321, the second switch valve 322, the exhaust switch valve 412 and the sixth switch valve 352 are first in an open state, and the remaining switch valves are in a closed state. When the hydrogen circulation pump 351 and the ejector 321 are tested in a gas return mode in series, the fourth switch valve 371 is opened and the seventh switch valve 353 is closed; when the hydrogen circulation pump 351 and the ejector 321 are tested in a gas return mode in parallel, the seventh switch valve 353 is opened and the fourth switch valve 371 is closed. The test gas medium is selected by adjusting the hydrogen supply switch valve 111 and the nitrogen supply switch valve 121 of the gas supply unit 1, and the gas is made to flow through the preheating flow path 21 by adjusting the outlet of the three-way valve 23. The test gas passes through the second switch valve 322, the ejector 321 to be tested, the stack simulation unit 4 and the gas-water separation unit 5 in sequence and reaches the inlet of the hydrogen circulation pump 351 to be tested. During this period, the liquid outlet switch valve 531 is opened and closed periodically to regularly discharge the separated liquid water.

[0102] Specifically, during the test, the pressure of the ejector outlet can be adjusted by the proportional valve integrated inside the ejector 321 to be tested, and the gas reflux flow and pressure can be regulated by adjusting the opening of the exhaust proportional valve 413 and the humidification proportional valve 424. The simulated stack outlet pressure (measured by the second pressure sensor 354 and the first pressure sensor 342) and the inlet pressure (measured by the intake pressure sensor 331) are adjusted by controlling the opening of the humidification proportional valve 424 to achieve the target pressure difference. The flow rate of the reflux gas in the second reflux branch 35 can also be adjusted by adjusting the rotation speed of the hydrogen circulation pump 351 to be tested, so as to comprehensively evaluate the compatibility of the single hydrogen circulation pump 351 and the ejector 321 and the working performance of the component monomers, compare the measured flow data with the preset reference parameters, and then measure the compatibility of the hydrogen circulation pump and the ejector 321.

[0103] In this embodiment, in the ejector 321 combined with the proportional valve return mode, a proportional valve is installed on the first air intake branch 31 as a component to be tested, the first switch valve 312, the second switch valve 322, the exhaust switch valve 412 and the fifth switch valve 341 are in an open state, and the remaining switch valves are in a closed state. The test gas medium is selected by adjusting the hydrogen supply switch valve 111 and the nitrogen supply switch valve 121 of the gas supply unit 1, and the gas is made to flow through the preheating flow path 21 by adjusting the outlet of the three-way valve 23. After the test gas enters the stack simulation unit 4 and the gas-water separation unit 5 in sequence from the first air intake branch 31 and the second air intake branch 32 at the same time, it flows back to the reflux inlet of the ejector 321 to be tested, during which the liquid outlet switch valve 531 is periodically opened and closed to regularly discharge the separated liquid water.

[0104] Specifically, during the test, the pressure of the ejector outlet can be adjusted by the proportional valve integrated inside the ejector 321 to be tested, and the gas reflux flow and pressure can be regulated by adjusting the opening of the exhaust proportional valve 413 and the humidification proportional valve 424. The simulated stack outlet pressure (measured by the first pressure sensor 342) and the inlet pressure (measured by the intake pressure sensor 331) are adjusted by controlling the opening of the humidification proportional valve 424 to achieve the target pressure difference, thereby evaluating the working performance and adaptability of the ejector 321 combined with the ejector 321 and the proportional valve in the return air mode of the proportional valve.

[0105] In this embodiment, in the single gas-water separator test mode, the third switch valve 361 and the gas outlet switch valve 521 are in the open state, and the other switch valves are in the closed state. The test gas medium is selected by adjusting the hydrogen supply switch valve 111 and the nitrogen supply switch valve 121 of the gas supply unit 1, and the gas is made to flow through the preheating flow path 21 by adjusting the outlet of the three-way valve 23. The test gas is fully humidified after entering the humidifier 421 from the third air inlet branch 36. After flowing through the gas-water separator 51, the liquid outlet switch valve 531 is periodically opened and closed to regularly discharge the separated liquid water. At the same time, the liquid volume meter 532 is used to measure the volume of liquid water separated by the gas-water separator 51 in a single test cycle. The unseparated gaseous water is discharged through the branch where the gas outlet switch valve 521 is located. At the same time, the water consumption in the water tank 4211 of the humidifier 421 in a single test cycle is recorded. The gas-water separation efficiency of the gas-water separator 51 can be calculated based on the volume of consumed water and the volume of separated liquid water, which is used to evaluate its matching with the fuel cell operating conditions.

[0106] It should be noted that this scheme mainly measures the main flow rate of the test gas (measured by the hydrogen supply flowmeter 115 or the nitrogen supply flowmeter 125), the reflux flow rate of the test gas (measured by the flowmeter 423), the inlet air pressure of the air intake component to be tested (measured by the air supply pressure sensor 136), the inlet pressure of the simulated fuel cell stack (measured by the intake pressure sensor 331) and the outlet pressure of the simulated fuel cell stack (measured by the first pressure sensor 342 or the second pressure sensor 354), and adjusts the main flow rate of the test gas, the inlet air pressure of the air intake component to be tested, the inlet pressure of the simulated fuel cell stack and the outlet pressure of the simulated fuel cell stack by controlling variables so that these parameter values ​​reach the preset target parameters, and then evaluates the working performance of the component to be tested based on the difference between the measured reflux flow rate of the test gas and the preset reference parameters.

[0107] like Figure 1 As shown, the test device includes a gas supply unit 1, a preheating unit 2, a gas circulation unit 3, a stack simulation unit 4, a gas-water separation unit 5, an exhaust gas emission unit 6 and a hydrogen concentration detection unit 7. The test device is sequentially connected with the gas supply unit 1, the preheating unit 2, the gas circulation unit 3 and the stack simulation unit 4 by pipelines, wherein the stack simulation unit 4 has two branches after the stack simulation unit 4, the first branch is sequentially connected to the reflux inlet of the gas-water separation unit 5 and the gas circulation unit 3, and the circuit is a humidification simulation flow path 42; the second branch of the stack simulation unit 4 is connected to the exhaust gas emission unit 6, and the branch is a gas consumption simulation flow path 41. The safety flow path 132 and the emptying flow path 134 of the gas supply unit 1, the branch where the stack simulation safety valve 425 of the stack simulation unit 4 is located, and the gas separation flow path 52 and the liquid separation flow path 53 of the gas-water separation unit 5 are all connected to the exhaust gas emission unit 6.

[0108] like Figure 3As shown, the gas supply unit 1 includes a hydrogen supply flow path 11 and a nitrogen supply flow path 12, wherein the hydrogen supply flow path 11 is composed of a hydrogen supply switch valve 111, a hydrogen filter 112, a hydrogen supply pressure reducing valve 113, a hydrogen supply solenoid valve 114, a hydrogen supply flow meter 115 and a hydrogen supply check valve 116 connected in sequence. The nitrogen supply flow path 12 is composed of a nitrogen supply switch valve 121, a nitrogen filter 122, a nitrogen supply pressure reducing valve 123, a nitrogen supply solenoid valve 124, a nitrogen supply flow meter 125 and a nitrogen supply check valve 126 connected in sequence. The hydrogen supply check valve 116 and the nitrogen supply check valve 126 are both connected to the main outlet flow path 13, and the gas flowing in from the inlet of the main outlet flow path 13 passes through the safety valve 131, the exhaust valve 133, the gas supply pressure sensor 136 and the gas supply temperature sensor 135 in sequence and then enters the preheating unit 2. The safety valve 131 is used to automatically release pressure when overpressure occurs, and the drain valve 133 is used to manually drain the inside of the pipeline of the gas supply unit 1. On the one hand, the gas supply unit 1 can switch the test gas medium by controlling the states of the two branch manual valves (equivalent to the hydrogen supply switch valve 111 and the nitrogen supply switch valve 121), and on the other hand, the nitrogen supply flow path 12 can also provide pipeline purge gas after the test is completed.

[0109] like Figure 4 As shown, the preheating unit 2 includes a three-way valve 23, a non-preheating flow path 22 and a preheating flow path 21. The first outlet of the three-way valve 23 is connected to the non-preheating flow path 22, and the second outlet is connected to the preheating flow path 21. The preheating flow path 21 is provided with a preheater 211. The gas enters and exits from the cold side inlet and outlet of the preheater 211. The hot side inlet and outlet of the preheater 211 together with the electric heater 213, the water pump 212, the preheating flow meter 214, the first preheating temperature sensor 215 and the second preheating temperature sensor 216 form a hot side circulation loop of the preheater 211. The outlets of the non-preheating flow path 22 and the preheating flow path 21 are both connected to the gas circulation unit 3.

[0110] Specifically, the three-way valve 23 is a single-inlet and double-outlet three-way valve. After the gas enters the three-way valve 23 from the inlet, it can only pass through one of the first outlet and the second outlet. Whether the gas is preheated can be controlled by switching the passage of the three-way valve 23. The hot side circulation loop of the preheater 211 uses antifreeze as the circulating medium, and the water pump 212 provides the circulation power. The preheating flow meter 214 can measure the mass flow of the circulating medium. The electric heater 213 controls the heating amount by adjusting the power. The first preheating temperature sensor 215 and the second preheating temperature sensor 216 are respectively located at the outlet and the inlet of the hot side of the preheater 211, and are respectively used to measure the inlet and outlet temperatures of the hot side of the preheater 211. The heat exchange capacity of the preheater 211 to the cold side gas medium can be comprehensively measured by the specific heat capacity of the circulating medium, the mass flow of the circulating medium and the inlet and outlet temperature difference of the hot side of the preheater 211.

[0111] like Figure 5As shown, the gas circulation unit 3 includes a first switch valve 312, a second switch valve 322, a third switch valve 361, an intake pressure sensor 331, an intake temperature sensor 332, a fifth switch valve 341, a first pressure sensor 342, a first temperature sensor 343, a sixth switch valve 352, a seventh switch valve 353, a second pressure sensor 354, a third pressure sensor 355, a second temperature sensor 356, a third temperature sensor 357, a fourth switch valve 371 and an intake main flow path 38.

[0112] Specifically, the third switch valve 361 is located in the third intake branch 36 of the gas circulation unit 3. The first switch valve 312 is located in the first intake branch 31, and the first intake branch 31 is used to install the proportional valve / hydrogen injector 311 conversion module. The second switch valve 322 is located in the second intake branch 32, and the second intake branch 32 is used to install the ejector 321. The intake pressure sensor 331 and the intake temperature sensor 332 are provided at the rear end of the confluence of the first intake branch 31 and the second intake branch 32, and then merge with the third intake branch 36 to enter the inlet of the stack simulation unit 4.

[0113] like Figure 5 As shown, the first reflux branch 34 and the second reflux branch 35 are connected in parallel to the reflux port of the gas-water separation unit 5, the second reflux branch 35 is connected in sequence to the sixth switch valve 352 and the seventh switch valve 353 to reflux to the inlet of the stack simulation unit 4, and the second reflux branch 35 is used to install a hydrogen circulation pump 351. A second pressure sensor 354 and a second temperature sensor 356 are arranged at the inlet of the installed hydrogen circulation pump 351, and a third pressure sensor 355 and a third temperature sensor 357 are arranged at the outlet of the hydrogen circulation pump 351. The first reflux branch 34 is connected in sequence to the fifth switch valve 341, the first temperature sensor 343 and the first pressure sensor 342, and then refluxes to the reflux inlet of the ejector 321 installed on the second intake branch 32, and at the same time, the branch section before the inlet of the seventh switch valve 353 of the second reflux branch 35 is connected to the outlet section of the first reflux branch 34.

[0114] Specifically, the first switch valve 312, the second switch valve 322, and the third switch valve 361 can realize the selection of the components to be tested by adjusting their own switch states, wherein the proportional valve / hydrogen injector 311 conversion module installed on the first intake branch 31 can be compatible with two types of intake adjustment modules, the proportional valve and the hydrogen injector 311, through the conversion of the connector, and the ejector 321 installed on the second intake branch 32 has an intake port, an ejection outlet, and a reflux inlet. The fourth switch valve 371, the fifth switch valve 341, the sixth switch valve 352, and the seventh switch valve 353 can combine the hydrogen circulation pump 351 with the intake adjustment module by adjusting their own switch states to realize a full range of tests of different gas supply modes. The temperature sensor and pressure sensor of the inlet and outlet of the hydrogen circulation pump 351 can be simultaneously applied to the combined test of the gas supply mode and the separate test condition of the hydrogen circulation pump 351.

[0115] Specifically, the second air intake branch 32 also includes two installation branches arranged in parallel, and both installation branches are used to install the ejector 321. There are two ejectors 321. In this way, the test condition of two ejectors 321 in parallel can be realized by connecting the three interfaces of the two ejectors 321 in parallel.

[0116] like Figure 6 As shown, the stack simulation unit 4 includes a gas consumption simulation flow path 41 and a humidification simulation flow path 42. The gas consumption simulation flow path 41 passes through the exhaust switch valve 412 and the exhaust proportional valve 413 in sequence through a pipeline, and then is connected to the exhaust emission unit 6 through the exhaust port 411 at the tail end. The humidification simulation flow path 42 is connected to the stack simulation safety valve 425, the humidifier 421, the humidity sensor 422, the flow meter 423, and the humidification proportional valve 424 in sequence through a pipeline, and then passes into the inlet of the gas-water separation unit 5. The humidification simulation flow path 42 is used for the circulation of circulating gas.

[0117] Specifically, the exhaust proportional valve 413 controls the gas flow through the gas consumption simulation flow path 41 by adjusting the opening. The stack simulation safety valve 425 is located at the entrance of the humidification simulation flow path 42 to prevent overpressure inside the stack simulation unit 4. The humidifier 421 is a spray humidifier to ensure sufficient humidification of the gas. The humidification simulation flow path 42 also includes a water tank 4211, which is used to replenish water for the humidifier 421 and has the function of measuring the volume of water consumed by humidification. The actual humidity and flow of the humidified gas are measured by the humidity sensor 422 and the flowmeter 423 respectively. The humidification proportional valve 424 controls the gas flow through the humidification simulation flow path 42 by adjusting the opening.

[0118] like Figure 7As shown, the gas-water separation unit 5 includes a gas-water separator 51, a gas outlet switch valve 521, a liquid outlet switch valve 531 and a liquid volume meter 532. The gas outlet of the gas-water separator 51 is connected to the reflux branch of the gas circulation unit 3 after passing through the branch where the gas outlet switch valve 521 is located. The other end of the gas outlet switch valve 521 is connected to the tail gas emission unit 6. The water outlet of the gas-water separator 51 is connected to the tail gas emission unit 6 after passing through the liquid outlet switch valve 531 and the liquid volume meter 532 in sequence. Specifically, the open state of the gas outlet switch valve 521 can be applied to the single test condition of the gas-water separator 51, and the closed state of the gas outlet switch valve 521 can be applied to the combined test condition of the components to be tested with different gas supplies. The liquid outlet switch valve 531 discharges the liquid water in the pipeline of the test device by periodically opening and closing, and the liquid volume meter 532 is used to record the volume of liquid water separated by the gas-water separator 51 during the test cycle.

[0119] like Figure 8 As shown, the exhaust gas emission unit 6 includes a warm exhaust gas temperature sensor 615, an exhaust gas pressure sensor 611, a hydrogen concentration sensor 612, a condenser 613 and a gas-water separator 614. After the front-end gas emission pipeline converges to the inlet of the exhaust gas emission unit 6, it passes through the exhaust gas temperature sensor 615, the exhaust gas pressure sensor 611, the hydrogen concentration sensor 612, the condenser 613 and the gas-water separator 614 in sequence through the pipeline, and then the gas and liquid are discharged from the gas tail outlet 6141 and the liquid tail outlet 6142 of the exhaust gas emission unit respectively.

[0120] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0121] 1. When hydrogen components are not debugged together with the fuel cell stack, the actual working process of the fuel cell system can be simulated, the hydrogen subsystem and its components can be fully verified and calibrated, and the performance test of the components can be realized separately and the matching analysis with the fuel cell stack can be realized;

[0122] 2. Realize the comprehensive operation data collection of the hydrogen subsystem and its components, fully monitor the operation status of the components, with the characteristics of fast timeliness, fast sampling speed, high accuracy, stability and reliability, and can analyze and report the sampling data in real time;

[0123] 3. The various units cooperate with each other to effectively simulate the impact of the working state of the fuel cell stack on the test gas, including gas consumption simulation, stack flow resistance simulation, excess gas simulation, stack heat and moisture generation simulation, to achieve full testing of the hydrogen subsystem and its components under simulated stack conditions;

[0124] 4. Achieve efficient control of fluid temperature, humidity and flow rate, fast communication speed, stable and reliable;

[0125] 5. It provides hydrogen concentration detection warning and exhaust emission treatment solutions, which can effectively improve the safety of the testing process;

[0126] 6. Effectively improve the efficiency of fuel cell system R&D, save R&D time and cost, and reduce the risk of fuel cell system R&D process.

[0127] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0128] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the application. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0129] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0130] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0131] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0132] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A testing device for testing the performance of a component to be tested, characterized in that: The testing device comprises: A stack simulation unit (4), comprising a gas consumption simulation flow path (41) for discharging a test gas and a humidification simulation flow path (42) for humidifying the test gas, wherein the gas consumption simulation flow path (41) and the humidification simulation flow path (42) are arranged in parallel; an air-water separation unit (5), wherein the inlet of the air-water separation unit (5) is connected to the outlet of the humidification simulation flow path (42), and the air-water separation unit (5) has a water outlet (511) for draining water and an air outlet (512) for exhausting air, so as to separate the test gas introduced by the humidification simulation flow path (42) into a water flow flowing into the water outlet (511) and an air flow flowing into the air outlet (512); A gas circulation unit (3), comprising an air intake module (301) and a reflux module (302) for installing the component to be tested, wherein the inlet of the air intake module (301) is used to introduce test gas, and the gas consumption simulation flow path (41) and the humidification simulation flow path (42) are both connected to the outlet of the air intake module (301); the outlet of the reflux module (302) is connected to the air intake module (301), and the inlet of the reflux module (302) is connected to the gas outlet (512) of the gas-water separation unit (5), so as to evaluate the performance of the component to be tested according to the difference between the gas flow rate measured at the outlet of the humidification simulation flow path (42) and a preset reference flow rate; Wherein, the component to be tested includes at least any one of a hydrogen injector, a proportional valve, an ejector and a hydrogen circulation pump.

2. The testing device according to claim 1, characterized in that: The component to be tested includes an air intake component to be tested and an air return component to be tested, wherein the air intake component to be tested includes at least one of a hydrogen injector, a proportional valve and an ejector, and the air return component to be tested includes at least one of a hydrogen circulation pump and an ejector; The air intake module (301) comprises an air intake branch and a converging air flow path (33) for installing the air intake component to be tested, the inlet of the air intake branch is used to introduce the test gas, the outlet of the air intake branch is connected to the inlet of the converging air flow path (33), and the outlet of the converging air flow path (33) is the outlet of the air intake module (301); The return module (302) comprises a return branch for installing the return air component to be tested, and an outlet of the return branch is used to communicate with the intake module (301).

3. The testing device according to claim 2, characterized in that: There are multiple intake branches, and the multiple intake branches include a first intake branch (31) and a second intake branch (32) arranged in parallel, the first intake branch (31) is used to install the hydrogen injector or the proportional valve; the second intake branch (32) is used to install the ejector.

4. The testing device according to claim 3, characterized in that: The air intake module (301) further comprises: a first switch valve (312) disposed at the inlet of the first air intake branch (31), wherein the opening of the first switch valve (312) is adjustable; and / or a second switch valve (322) disposed at the inlet of the second air intake branch (32), wherein the opening of the second switch valve (322) is adjustable; and / or A third air intake branch (36), wherein the first air intake branch (31) and the second air intake branch (32) are both arranged in parallel with the third air intake branch (36); and a third switch valve (361) whose opening can be adjusted is arranged on the third air intake branch (36).

5. The testing device according to claim 2, characterized in that: The air intake branch comprises a first air intake branch (31) and a second air intake branch (32) arranged in parallel, wherein the first air intake branch (31) is used to install a hydrogen injector or a proportional valve; the second air intake branch (32) is used to install an ejector; and the return branch comprises: a first reflux branch (34), wherein the inlet of the first reflux branch (34) is communicated with the gas outlet (512) of the gas-water separation unit (5), the outlet of the first reflux branch (34) is communicated with the reflux inlet of the ejector installed on the second air inlet branch (32), and the first reflux branch (34) is provided with a fifth switch valve (341) whose opening can be adjusted; A second reflux branch (35), wherein the second reflux branch (35) is provided with a mounting portion for mounting a hydrogen circulation pump, the inlet of the second reflux branch (35) is connected to the gas outlet (512) of the gas-water separation unit (5), the outlet of the second reflux branch (35) is connected to the converging gas path (33), and the second reflux branch (35) is provided with a sixth switch valve (352) whose opening can be adjusted.

6. The testing device according to claim 5, characterized in that: The return branch also includes: A series branch (37), wherein a fourth switch valve (371) is provided on the series branch (37), one end of the series branch (37) is connected to the gas outlet end of the first return branch (34), and the other end of the series branch (37) is connected to the gas outlet end of the second return branch (35); The seventh switch valve (353) is arranged on the second return flow branch (35) and is located between the converging flow path (33) and the series branch (37).

7. The testing device according to claim 5, characterized in that: The gas circulation unit (3) further comprises: an intake pressure sensor (331), arranged on the converging gas path (33) and located between the inlet of the converging gas path (33) and the outlet of the second reflux branch (35), the intake pressure sensor (331) being used to detect the pressure of the gas flowing through; and / or, a first pressure sensor (342), arranged on the first reflux branch (34), the first pressure sensor (342) being used to detect the pressure of the outflowing gas of the first reflux branch (34); and / or, The second pressure sensor (354) and the third pressure sensor (355) are both arranged on the second return branch (35), the second pressure sensor (354) is arranged between the mounting portion and the inlet of the second return branch (35), and the third pressure sensor (355) is arranged between the mounting portion and the outlet of the second return branch (35).

8. The testing device according to claim 1, characterized in that: The humidification simulation flow path (42) is provided with a humidifier (421); the stack simulation unit (4) further comprises: a flow meter (423), arranged at the outlet of the humidification simulation flow path (42), the flow meter (423) being used to measure the gas flow at the outlet of the humidification simulation flow path (42); and / or, a humidity sensor (422), arranged on the humidification simulation flow path (42) and located between the humidifier (421) and an outlet of the humidification simulation flow path (42), the humidity sensor (422) being used to detect the humidity of the gas flowing through; and / or, The humidification proportional valve (424) is arranged on the humidification simulation flow path (42) and is located between the humidifier (421) and the outlet of the humidification simulation flow path (42), and the opening degree of the humidification proportional valve (424) is adjustable.

9. The testing device according to claim 1, characterized in that: The gas-water separation unit (5) comprises a gas-water separator (51), and the gas-water separation unit (5) further comprises: A gas separation flow path (52) and a gas outlet switch valve (521), wherein the inlet of the gas separation flow path (52) is connected to the gas outlet of the gas-water separator (51), the inlet of the reflux module (302) is connected to the outlet of the gas separation flow path (52), the gas outlet switch valve (521) is arranged on the gas separation flow path (52), and the opening of the gas outlet switch valve (521) is adjustable; and / or, A liquid separation flow path (53), a liquid outlet switch valve (531) and a liquid volume meter (532), wherein the inlet of the liquid separation flow path (53) is connected to the water outlet of the gas-water separator (51), the outlet of the liquid separation flow path (53) is connected to the liquid volume meter (532), and the liquid outlet switch valve (531) is arranged on the liquid separation flow path (53); the liquid volume meter (532) has a collection chamber, and the detection end of the liquid volume meter (532) is used to measure the volume of liquid in the collection chamber.

10. The testing device according to any one of claims 1 to 9, characterized in that: The test gas includes hydrogen and nitrogen; the test device also includes: A gas supply unit (1) comprises a hydrogen supply path (11) and a nitrogen supply path (12); one end of the hydrogen supply path (11) is connected to a hydrogen source, and the other end is connected to an inlet of the air intake module (301); one end of the nitrogen supply path (12) is connected to a nitrogen source, and the other end is connected to an inlet of the air intake module (301); The hydrogen supply flow path (11) is provided with a hydrogen supply switch valve (111), and the nitrogen supply flow path (12) is provided with a nitrogen supply switch valve (121), and the openings of the hydrogen supply switch valve (111) and the nitrogen supply switch valve (121) are adjustable.

11. The testing device according to claim 10, characterized in that: The gas supply unit (1) further comprises a main gas outlet passage (13), the outlet of the hydrogen supply passage (11) and the outlet of the nitrogen supply passage (12) are both connected to the inlet of the main gas outlet passage (13), and the outlet of the main gas outlet passage (13) is connected to the inlet of the gas intake module (301); the gas supply unit (1) further comprises: a safety valve (131) and a safety flow path (132), one end of the safety flow path (132) being connected to the main gas outlet path (13), and the other end forming a safety gas port for exhausting gas, the safety valve (131) being arranged on the safety flow path (132), and the opening of the safety valve (131) being adjustable; and / or, an exhaust valve (133) and an exhaust flow path (134), one end of the exhaust flow path (134) being connected to the main air outlet path (13), and the other end forming an exhaust air port for exhausting air, the exhaust valve (133) being arranged on the exhaust flow path (134), and the opening of the exhaust valve (133) being adjustable; and / or, A gas supply pressure sensor (136) is arranged on the main gas outlet passage (13), and the gas supply pressure sensor (136) is used to detect the pressure of the gas flowing through.

12. The testing device according to any one of claims 1 to 9, characterized in that: The testing device further comprises a gas supply unit (1); The testing device also includes: The preheating unit (2) comprises a preheating flow path (21) and a non-preheating flow path (22); the inlet of the preheating flow path (21) can be selectively connected to the outlet of the gas supply unit (1), the outlet of the preheating flow path (21) is connected to the inlet of the air intake module (301), and the preheating flow path (21) is provided with a preheater (211) for heating the gas flowing therethrough; the inlet of the non-preheating flow path (22) can be selectively connected to the outlet of the gas supply unit (1), and the outlet of the non-preheating flow path (22) is connected to the inlet of the air intake module (301).

13. The testing device according to any one of claims 1 to 9, characterized in that: The test device further comprises an exhaust gas emission unit (6), the exhaust gas emission unit (6) comprising an exhaust gas emission flow path (61), the inlet of the exhaust gas emission flow path (61) being connected to the outlet of the gas consumption simulation flow path (41), and the exhaust gas emission unit (6) further comprises: an exhaust gas pressure sensor (611), arranged on the exhaust gas discharge flow path (61), the exhaust gas pressure sensor (611) being used to detect the gas pressure in the exhaust gas discharge flow path (61); and / or, a hydrogen concentration sensor (612), arranged on the exhaust gas discharge flow path (61), the hydrogen concentration sensor (612) being used to detect the hydrogen concentration of the gas in the exhaust gas discharge flow path (61); and / or, The condenser (613) and the gas-water separator (614) are both arranged on the exhaust gas discharge flow path (61); the condenser (613) is located on a side of the gas-water separator (614) close to the inlet of the exhaust gas discharge flow path (61); and the gas-water separator (614) has a gas exhaust port (6141) for exhausting gas and a liquid exhaust port (6142) for discharging liquid.

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