Method and apparatus for testing hydrogen circulation pumps

Abstract

The hydrogen circulation pump test method and device provided by the embodiments of the present disclosure belong to the technical field of fuel cells. The test method comprises: obtaining environmental parameters and test parameters corresponding to each working condition; wherein each environmental parameter corresponds to a group of test parameters, each group of test parameters comprises at least two test parameters, each environmental parameter comprises an outlet pressure value of a hydrogen circulation pump, and each test parameter comprises a boost value and a current rotating speed and a flow value; under each environmental parameter, the following steps are performed for each parameter: starting the hydrogen circulation pump, adjusting the current rotating speed of the hydrogen circulation pump, adjusting an electric proportional valve, adjusting the boost value of the hydrogen circulation pump, and recording the flow value corresponding to each current rotating speed and each boost value. Through the embodiments of the present disclosure, the accuracy of testing the capacity of the hydrogen circulation pump can be improved.

Description

Technical Field

[0001] This disclosure relates to the field of fuel cell technology, and more particularly to a testing method and apparatus for hydrogen circulation pumps. Background Technology

[0002] A fuel cell is a chemical device that directly converts the chemical energy of fuel into electrical energy. Fuel cells include solid oxide fuel cells, hydrogen fuel cells, alkaline fuel cells, phosphoric acid fuel cells, and proton exchange membrane fuel cells. Hydrogen fuel cells, in particular, are power generation devices that directly convert the chemical energy of hydrogen and oxygen into electrical energy. Before building a hydrogen fuel cell system, the selection of the hydrogen circulation pump, in addition to calculations, requires testing to ensure that the pump's capacity meets requirements. Current main approaches to hydrogen fuel cell systems involve testing the flow rate of the hydrogen circulation pump within a certain pressure boost range; however, the pressure difference across the hydrogen circulation pump on the test bench is provided by the pump itself, representing active pressurization. This does not align with the actual usage of hydrogen fuel cell systems, leading to inaccurate testing of the hydrogen circulation pump's capacity. Summary of the Invention

[0003] The main objective of this disclosure is to provide a testing method and apparatus for a hydrogen circulation pump, which can improve the accuracy of testing the capability of the hydrogen circulation pump.

[0004] To achieve the above objectives, a first aspect of this disclosure provides a test method for a hydrogen circulation pump, comprising:

[0005] Obtain environmental parameters and test parameters corresponding to each working condition; wherein, each environmental parameter corresponds to a set of test parameters, each set of test parameters includes at least two test parameters, each environmental parameter includes the outlet pressure value of the hydrogen circulation pump, and each test parameter includes the pressure boost value and the current speed and flow rate value;

[0006] Under each of the aforementioned environmental parameters, the following steps are performed for each parameter:

[0007] Turn on the hydrogen circulation pump and adjust the current speed of the hydrogen circulation pump;

[0008] Adjust the electric proportional valve to adjust the pressure boost value of the hydrogen circulation pump;

[0009] Record the flow rate value corresponding to each current rotational speed and each boost pressure value.

[0010] In some embodiments, the method further includes:

[0011] Adjust the pressure reducing valve to the outlet pressure value corresponding to each of the above operating conditions;

[0012] Open the shut-off valve.

[0013] In some embodiments, the method further includes:

[0014] Initialize the test environment, specifically including:

[0015] Open the pressure reducing valve to its minimum position and close the shut-off valve.

[0016] In some embodiments, the initialization of the test environment further includes:

[0017] Fully open the electric proportional valve and start the water pump.

[0018] To achieve the above objectives, a second aspect of this disclosure provides a testing apparatus for a hydrogen circulation pump, comprising:

[0019] A hydrogen storage cylinder, which is used to store compressed hydrogen from a hydrogen circulation pump;

[0020] A temperature and pressure sensor is connected to the hydrogen storage cylinder and is used to measure the pressure value of the hydrogen circulation pump.

[0021] An electric proportional valve, wherein the electric proportional valve is connected to the temperature and pressure sensor and the hydrogen storage cylinder;

[0022] A mass flow meter, wherein the mass flow meter is connected to the electric proportional valve and the temperature and pressure sensor;

[0023] A heat dissipation device, wherein the heat dissipation device is connected to the hydrogen storage cylinder and the electric proportional valve;

[0024] A gas pipeline is formed between the temperature and pressure sensor, the electric proportional valve, the mass flow meter, and the heat dissipation device. The electric proportional valve is used to adjust the gas flow rate of the gas pipeline, the mass flow meter is used to measure the gas flow rate of the gas pipeline, and the heat dissipation device is used to dissipate the heat generated by the hydrogen circulation pump after compressing hydrogen.

[0025] In some embodiments, the hydrogen storage cylinder is connected to a pressure reducing valve, and a pressure gauge is connected via the pressure reducing valve.

[0026] In some embodiments, the hydrogen storage cylinder is also connected to a shut-off valve via the pressure reducing valve.

[0027] In some embodiments, the pressure reducing valve is connected to the temperature and pressure sensor and the heat dissipation device via the shut-off valve.

[0028] In some embodiments, the heat dissipation device includes an intercooler, a radiator, and a water pump, wherein the water pump is connected to the electric proportional valve through the intercooler, and the water pump is also connected to the radiator through the intercooler.

[0029] In some embodiments, the device includes two temperature and pressure sensors, one end of the water pump is connected to the first end of the intercooler, the other end of the water pump is connected to one end of the radiator, the other end of the radiator is connected to the second end of the intercooler, the third end of the intercooler is connected to the shut-off valve and one of the temperature and pressure sensors, the fourth end of the intercooler is connected to the electric proportional valve, and the mass flow meter is connected to the other temperature and pressure sensor.

[0030] The hydrogen circulation pump testing method and apparatus disclosed in this embodiment acquire environmental parameters and test parameters corresponding to each operating condition, and under each environmental parameter, perform the following steps for each parameter: start the hydrogen circulation pump, adjust the current speed of the hydrogen circulation pump, adjust the electric proportional valve, adjust the pressure boost value of the hydrogen circulation pump, and record the flow rate value corresponding to each current speed and each pressure boost value. This embodiment improves the accuracy of testing the capability of the hydrogen circulation pump. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of a test apparatus for a hydrogen circulation pump provided in an embodiment of this disclosure.

[0032] Figure 2 This is a flowchart of a test method for a hydrogen circulation pump provided in an embodiment of this disclosure.

[0033] Figure 3 This is a partial flowchart of a test method for a hydrogen circulation pump provided in another embodiment of this disclosure.

[0034] Figure 4 This is a test record table of a hydrogen circulation pump generated by the test method for the hydrogen circulation pump provided in this embodiment of the disclosure. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments disclosed herein clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application.

[0036] It should be noted that although functional modules are divided in the device schematic diagram and a logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the order in the flowchart. The terms "first," "second," etc., in the specification, claims, and the aforementioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which embodiments of this disclosure belong. The terminology used herein is for the purpose of describing embodiments of this disclosure only and is not intended to limit the scope of this disclosure.

[0038] First, let's analyze some of the terms used in this application:

[0039] A fuel cell is a chemical device that directly converts the chemical energy of fuel into electrical energy. Fuel cells include solid oxide fuel cells, hydrogen fuel cells, alkaline fuel cells, phosphoric acid fuel cells, and proton exchange membrane fuel cells. Among them, hydrogen fuel cells are power generation devices that directly convert the chemical energy of hydrogen and oxygen into electrical energy.

[0040] Pressure has a significant impact on fuel cell performance during operation. Increased fuel gas pressure leads to increased partial pressure of the reactants, gas solubility, and mass transfer rates, thereby improving cell performance. During the operation of a fuel cell engine system, a hydrogen recirculation pump is commonly used to transport hydrogen from the stack outlet to the stack inlet, thus improving hydrogen utilization.

[0041] Before constructing a hydrogen fuel cell, the selection of the hydrogen recirculation pump requires not only calculations but also testing to ensure its capacity meets requirements. Current testing methods for hydrogen recirculation pumps in fuel cell systems primarily involve testing the flow rate within a specific pressure range. However, the pressure difference across the pump on the test bench is provided by the pump itself, representing an active pressurization process. This does not align with actual usage conditions in hydrogen fuel cell systems, leading to inaccurate testing of the pump's capacity.

[0042] Based on this, the present disclosure provides a technical solution that can improve the accuracy of testing the capability of a hydrogen circulation pump.

[0043] This disclosure provides a testing method and apparatus for a hydrogen circulation pump, which will be specifically described through the following embodiments. First, the testing apparatus for the hydrogen circulation pump in this disclosure is described.

[0044] The hydrogen circulation pump testing method provided in this disclosure can be applied to test the capability of hydrogen circulation pumps in fuel cells and improves the accuracy of testing the capability of hydrogen circulation pumps.

[0045] Figure 1This is an optional schematic diagram of a testing apparatus for a hydrogen circulation pump provided in this embodiment. The testing apparatus for the hydrogen circulation pump includes a hydrogen cylinder, a temperature and pressure sensor, an electric proportional valve, a mass flow meter, and a heat dissipation device. The hydrogen storage cylinder is connected to the temperature and pressure sensor and the heat dissipation device. The electric proportional valve is connected to the mass flow meter, the temperature and pressure sensor, and the heat dissipation device. The hydrogen cylinder is a hydrogen storage cylinder used to store compressed hydrogen for the hydrogen circulation pump. The temperature and pressure sensor is used to measure the pressure value of the hydrogen circulation pump. A gas pipeline is formed between the temperature and pressure sensor, the electric proportional valve, the mass flow meter, and the heat dissipation device. The electric proportional valve is used to adjust the gas flow rate in the gas pipeline. The mass flow meter is used to measure the gas flow rate in the gas pipeline. The heat dissipation device is used to dissipate the heat generated by the hydrogen circulation pump after compressing hydrogen.

[0046] The testing apparatus for hydrogen circulation pumps provided in this disclosure can improve the accuracy of testing the capabilities of hydrogen circulation pumps.

[0047] In some embodiments, the hydrogen storage cylinder is a cold hydrogen storage cylinder. The hydrogen storage cylinder is used to store a sufficient amount of compressed hydrogen.

[0048] In some embodiments, the hydrogen storage cylinder is connected to a pressure reducing valve, and a pressure gauge is connected to the pressure reducing valve. Further, the hydrogen storage cylinder is also connected to a shut-off valve via the pressure reducing valve. Even further, the pressure reducing valve is connected to a temperature and pressure sensor and a heat dissipation device via the shut-off valve. The hydrogen storage cylinder is connected to the pressure reducing valve, the pressure gauge, and the shut-off valve. In some embodiments, the pressure reducing valve is a mechanical pressure reducing valve; the pressure gauge is a mechanical pressure gauge.

[0049] In some embodiments, temperature and pressure sensors are used to measure the pressure of a hydrogen circulation pump where the medium is hydrogen and the flow range meets the test requirements. Specifically, embodiments of this disclosure include two temperature and pressure sensors, used to measure the inlet pressure at the inlet of the hydrogen circulation pump and the outlet pressure at the outlet, respectively. A mass flow meter is connected between an electric proportional valve and one of the temperature and pressure sensors. The other electric proportional valve is located between the shut-off valve and the hydrogen circulation pump. Please refer to [link to relevant documentation]. Figure 1 Temperature and pressure sensor 1 is used to measure the inlet pressure of the hydrogen circulation pump, and temperature and pressure sensor 2 is used to measure the outlet pressure of the hydrogen circulation pump. Temperature and pressure sensor 2 is connected to the shut-off valve and is used to connect to the outlet of the hydrogen circulation pump. Temperature and pressure sensor 1 is connected to the mass flow meter and is used to connect to the inlet of the hydrogen circulation pump.

[0050] The cooling system includes an intercooler, a radiator, and a water pump. The water pump is connected to an electric proportional valve via the intercooler; the water pump is also connected to the radiator via the intercooler; the water pump is further connected to a shut-off valve and one of the temperature and pressure sensors via the intercooler. For details, please refer to [link to relevant documentation]. Figure 1One end of the water pump is connected to the first end of the intercooler; the other end of the water pump is connected to one end of the radiator; the other end of the radiator is connected to the second end of the intercooler; the third end of the intercooler is connected to the shut-off valve and one of the temperature and pressure sensors 1; the fourth end of the intercooler is connected to the electric proportional valve.

[0051] In some embodiments, the maximum gas flow capacity of the electric proportional valve is greater than the peak flow rate of the hydrogen circulation pump, and it can accurately regulate the gas flow rate.

[0052] In some embodiments, the mass flow meter has a range greater than the peak flow rate of the hydrogen circulation pump and can accurately measure the gas flow rate.

[0053] In some embodiments, the gas pipeline has low flow resistance, is robust, pressure-resistant, and leak-free.

[0054] Figure 2 This is an optional flowchart of the test method for the hydrogen circulation pump provided in the embodiments of this disclosure. Figure 2 The method includes steps 201 to 204.

[0055] Step 201: Obtain the environmental parameters and test parameters corresponding to each working condition; wherein, each environmental parameter corresponds to a set of test parameters, each set of test parameters includes at least two test parameters, each environmental parameter includes the outlet pressure value of the hydrogen circulation pump, and each test parameter includes the pressure rise value and the current speed and flow rate value;

[0056] For each environmental parameter, perform the following steps:

[0057] Step 202: Turn on the hydrogen circulation pump and adjust the current speed of the hydrogen circulation pump;

[0058] Step 203: Adjust the electric proportional valve to adjust the pressure boost value of the hydrogen circulation pump;

[0059] Step 204: Record the flow rate value corresponding to each current rotational speed and each boost pressure value.

[0060] Specifically, the testing method for the hydrogen circulation pump provided in this disclosure is used to test the pump under different operating conditions. These operating conditions primarily refer to the outlet pressure and boost pressure of the hydrogen circulation pump. Since different operating conditions require different hydrogen circulation flow rates, the tests in this disclosure assess the pump's capacity under these conditions. By comparing the tested data with the required flow rate, it can be determined whether the hydrogen circulation pump is insufficient, adequate, or excessive.

[0061] In step 202, the pressure value at the inlet of the hydrogen circulation pump is the inlet pressure value, the pressure value at the outlet of the hydrogen circulation pump is the outlet pressure value, and the pressure boost value of the hydrogen circulation pump is the pressure difference between the inlet pressure value at the inlet of the hydrogen circulation pump and the outlet pressure value at the outlet, that is, the pressure difference obtained by subtracting the outlet pressure value from the inlet pressure value.

[0062] Please see Figure 3 In some embodiments, prior to step 201, the test method for the hydrogen circulation pump further includes:

[0063] Step 301: Initialize the test environment.

[0064] Specifically, the initialization of the test environment includes: opening the pressure reducing valve to its minimum, closing the shut-off valve, fully opening the electric proportional valve, and starting the water pump.

[0065] In some embodiments, after initializing the test environment, the test method for the hydrogen circulation pump further includes:

[0066] Step 302: Adjust the pressure reducing valve to the outlet pressure value corresponding to each operating condition;

[0067] Step 303: Open the shut-off valve.

[0068] Specifically, in step 302, the pressure reducing valve is adjusted to the outlet pressure value of the hydrogen circulation pump corresponding to each operating condition of the hydrogen fuel cell.

[0069] In some embodiments, the test method for the hydrogen circulation pump after opening the shut-off valve further includes:

[0070] Determine whether the readings of the first and second temperature and pressure sensors both reach the outlet pressure value under the corresponding operating conditions.

[0071] If it is determined that the readings of both the first and second temperature and pressure sensors have reached the outlet pressure value under the corresponding operating conditions, then the above steps are executed: "Start the hydrogen circulation pump and adjust the current speed of the hydrogen circulation pump".

[0072] Specifically, the first temperature and pressure sensor is used to measure the inlet pressure of the hydrogen circulation pump, and the reading of the first temperature and pressure sensor corresponds to the measured actual inlet pressure of the hydrogen circulation pump; the second temperature and pressure sensor is used to measure the inlet pressure of the hydrogen circulation pump, and the reading of the second temperature and pressure sensor corresponds to the measured actual outlet pressure of the hydrogen circulation pump.

[0073] The hydrogen circulation pump testing method provided in this disclosure involves acquiring environmental parameters and test parameters corresponding to each operating condition, and then, under each environmental parameter, performing the following steps for each parameter: starting the hydrogen circulation pump, adjusting the current speed of the hydrogen circulation pump, adjusting the electric proportional valve, adjusting the pressure boost value of the hydrogen circulation pump, and recording the flow rate value corresponding to each current speed and each pressure boost value. This disclosure method can improve the accuracy of testing the capability of the hydrogen circulation pump.

[0074] Furthermore, the testing method of the present disclosure embodiment will be described below with reference to a specific implementation method.

[0075] Step 1: Open the pressure reducing valve to its minimum position and close the shut-off valve;

[0076] Fully open the electric proportional valve to start the water pump;

[0077] Step 2: Adjust the pressure reducing valve to the outlet pressure value P1 of the hydrogen fuel cell in the first operating condition, and open the shut-off valve;

[0078] Step 3: Start the test when the pressure values ​​of both temperature and pressure sensor 1 and temperature and pressure sensor 2 reach P1 and stabilize.

[0079] Step 4: Turn on the hydrogen pump and adjust the current speed to R1;

[0080] Step 5: Adjust the electric proportional valve so that the pressure difference between temperature and pressure sensor 1 and temperature and pressure sensor 2 is PΔ1;

[0081] Step 6: Record the mass flow rate count value;

[0082] Step 7: Adjust the electric proportional valves sequentially so that the pressure difference between temperature and pressure sensor 1 and temperature and pressure sensor 2 is PΔ2 to PΔX respectively. Then, execute steps 2 to 6 above sequentially to record the mass flow count values ​​in sequence; thus completing the first set of tests.

[0083] Step 8: Fully open the electric proportional valve and adjust the current speed of the hydrogen circulation pump to R2; repeat steps 5 to 7 above to complete the second set of tests.

[0084] Step 9: Repeat steps 2 to 8 above to complete N sets of tests from the current rotational speed R1 to RN.

[0085] Step 10: Adjust the pressure reducing valve sequentially to the outlet pressure values ​​P2 to PM of the hydrogen fuel cell from the second operating condition to the Mth operating condition, and then repeat steps 1 to 9 above to complete the N*M group test.

[0086] In some embodiments, PΔ1, PΔ2 to PΔX are simulated fuel cell stack current resistances.

[0087] Please see Figure 4 As shown, following the steps above, all test data are recorded to obtain the hydrogen circulation pump test record table. The test data in the record table can be referenced. Figure 4 The data is recorded in tabular form. For example, under the first operating condition, with an outlet pressure value of P1, the mass flow rate counts from PΔ1 to PΔX corresponding to the current speed R1 are measured; under the first operating condition, with an outlet pressure value of P1, the mass flow rate counts from PΔ1 to PΔX corresponding to the current speed R2 are measured; and so on. Under the first operating condition, with an outlet pressure value of P1, the mass flow rate counts from PΔ1 to PΔX corresponding to the current speed R3 to RN are measured. Then, under the second operating condition, with an outlet pressure value of P2, the mass flow rate counts from PΔ1 to PΔX corresponding to the current speed R1 are measured; under the second operating condition, with an outlet pressure value of P2, the mass flow rate counts from PΔ1 to PΔX corresponding to the current speed R2 are measured; and so on. Under the second operating condition, with an outlet pressure value of P2, the mass flow rate counts from PΔ1 to PΔX corresponding to the current speed R3 to RN are measured. Under operating conditions M, following the steps described above, measure the mass flow rate counts of PΔ1 to PΔX corresponding to the current rotational speeds R1 to RN, respectively. This completes the N*M test group.

[0088] The technical solution provided in this disclosure provides a stable differential pressure across the hydrogen circulation pump, allowing the pump to passively increase its pressure, similar to actual usage, thereby improving the accuracy of measurement data.

[0089] Understandably, the hydrogen pressure value, the current speed of the hydrogen circulation pump, and the values ​​from the temperature and pressure sensors are set according to actual needs. Due to differences in hydrogen fuel cells, hydrogen circulation pumps, and fuel cell system designs, these settings are tailored to specific application scenarios, and the current speed of the hydrogen circulation pump is determined by the parameters of the pump under test. For example, under peak system conditions, the hydrogen pressure is 300 kPa (absolute pressure). The hydrogen pressure value can be divided into multiple equal parts, such as five or more, from 100 kPa (absolute pressure) to 300 kPa (absolute pressure). Similarly, the current speed of the hydrogen circulation pump can be divided into n equal parts, from 0 to the peak speed (Ra) of the pump under test, i.e., R1 to RN. The operating condition M should represent the peak operating condition of the fuel cell system, with each condition corresponding to a different outlet pressure value.

[0090] The hydrogen circulation pump testing method and apparatus disclosed in this embodiment acquire environmental parameters and test parameters corresponding to each operating condition, and under each environmental parameter, perform the following steps for each parameter: start the hydrogen circulation pump, adjust the current speed of the hydrogen circulation pump, adjust the electric proportional valve, adjust the pressure boost value of the hydrogen circulation pump, and record the flow rate value corresponding to each current speed and each pressure boost value. This embodiment improves the accuracy of testing the capability of the hydrogen circulation pump. Furthermore, this technical solution can ensure a stable differential pressure across the hydrogen circulation pump, allowing for passive pressure boosting of the pump, similar to actual usage conditions, thereby improving the accuracy of the measurement data.

[0091] The embodiments described in this disclosure are for the purpose of more clearly illustrating the technical solutions of this disclosure and do not constitute a limitation on the technical solutions provided by this disclosure. As those skilled in the art will know, with the evolution of technology and the emergence of new application scenarios, the technical solutions provided by this disclosure are also applicable to similar technical problems.

[0092] It will be understood by those skilled in the art that Figure 1 The test apparatus for the hydrogen circulation pump shown in the figure does not constitute a limitation on the embodiments of this disclosure and may include more or fewer elements than shown, or combine certain elements, or different elements. Figure 2-3 The test method for the hydrogen circulation pump shown does not constitute a limitation on the embodiments of this disclosure and may include more or fewer steps than shown, or a combination of certain steps, or different steps.

[0093] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0094] Those skilled in the art will understand that all or some of the steps in the methods disclosed above, as well as the functional modules / units in the systems and devices, can be implemented as software, firmware, hardware, or suitable combinations thereof.

[0095] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0096] It should be understood that in this application, "at least one (item)" means one or more, and "more than" means two or more. "And / or" is used to describe the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0097] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0098] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0099] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0100] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes multiple instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing programs, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0101] The preferred embodiments of the present disclosure have been described above with reference to the accompanying drawings, but this does not limit the scope of the claims of the present disclosure. Any modifications, equivalent substitutions, and improvements made by those skilled in the art without departing from the scope and spirit of the present disclosure shall be within the scope of the claims of the present disclosure.

Claims

1. A test method for a hydrogen circulation pump, characterized in that, The test method for the hydrogen circulation pump is based on a test device for the hydrogen circulation pump. The test device includes: a hydrogen storage cylinder, a first temperature and pressure sensor, a second temperature and pressure sensor, an electric proportional valve, a mass flow meter, and a heat dissipation device. The hydrogen storage cylinder stores compressed hydrogen for the circulation pump. The first temperature and pressure sensor is connected to the hydrogen storage cylinder and measures the pressure of the hydrogen circulation pump. The first and second temperature and pressure sensors are connected to the two ends of the hydrogen circulation pump, respectively. The electric proportional valve connects the first temperature and pressure sensor and the hydrogen storage cylinder. The mass flow meter is connected to the electric proportional valve and the second temperature and pressure sensor. The heat dissipation device is connected to the hydrogen storage cylinder and the electric proportional valve. A gas pipeline is formed between the first temperature and pressure sensor, the second temperature and pressure sensor, the electric proportional valve, the mass flow meter, and the heat dissipation device. The heat dissipation device is used to dissipate the heat generated after the hydrogen circulation pump compresses hydrogen. The hydrogen storage cylinder is connected to a pressure reducing valve and a shut-off valve through the pressure reducing valve. The pressure reducing valve is connected to the first temperature and pressure sensor and the heat dissipation device through the shut-off valve. The heat dissipation device includes an intercooler, a radiator, and a water pump. The method includes: Obtain environmental parameters and test parameters corresponding to each working condition; wherein, each environmental parameter corresponds to a set of test parameters, each set of test parameters includes at least two test parameters, each environmental parameter includes the outlet pressure value of the hydrogen circulation pump, and each test parameter includes the pressure boost value and the current speed and flow rate value; Under each of the aforementioned environmental parameters, the following steps are performed for each of the aforementioned test parameters: Turn on the hydrogen circulation pump and adjust the current speed of the hydrogen circulation pump; Adjust the electric proportional valve to adjust the pressure boost value of the hydrogen circulation pump; Record the flow rate value corresponding to each of the current rotational speeds and each of the boost pressure values; The method further includes: Adjust the pressure reducing valve to the outlet pressure value corresponding to each of the above operating conditions; Open the shut-off valve; The method further includes: initializing the test environment, specifically including: Open the pressure reducing valve to its minimum position and close the shut-off valve; Fully open the electric proportional valve and start the water pump.

2. The method according to claim 1, characterized in that, The electric proportional valve is used to regulate the gas flow rate in the gas pipeline, the mass flow meter is used to measure the gas flow rate in the gas pipeline, the hydrogen storage cylinder is also connected to a pressure gauge via a pressure reducing valve, and the water pump is connected to the radiator via the intercooler.

3. The method according to claim 2, characterized in that, One end of the water pump is connected to the first end of the intercooler, the other end of the water pump is connected to one end of the radiator, the other end of the radiator is connected to the second end of the intercooler, the third end of the intercooler is connected to the shut-off valve and the first temperature and pressure sensor, and the fourth end of the intercooler is connected to the electric proportional valve.

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