Single-stage air compressor test bench of controllable humidity hydrogen fuel cell system

Abstract

The utility model belongs to the fuel cell air compressor test field, and especially relates to a controllable humidity hydrogen fuel cell system single-stage air compressor test bench comprising an air filter used for inputting air; the first-stage temperature and humidity control box realizes temperature and humidity control based on electric heating and water spraying and is connected to the air filter; the second-stage temperature and humidity control box realizes temperature and humidity control based on a mold temperature controller and water spraying and is connected to the first-stage temperature and humidity control box; the air inlet pressure control valve is connected to the second-stage temperature and humidity control box; the air flow meter is connected to the air inlet pressure control valve; the single-stage air compressor is connected to the air flow meter; the first intercooler is connected to the single-stage air compressor; the dehumidification control box achieves dehumidification based on cooling of the mold temperature controller and is connected with the first intercooler. The exhaust control valve is connected to the dehumidification control box; a muffler connected to the exhaust control valve; and the inversion module is electrically connected to the single-stage air compressor, so that a humidity-controllable hydrogen fuel cell system single-stage air compressor test scheme is realized.

Description

Technical Field

[0001] This utility model belongs to the field of fuel cell air compressor testing technology, and in particular relates to a test bench for a single-stage air compressor of a controllable humid hydrogen fuel cell system. Background Technology

[0002] Hydrogen fuel cell vehicles are hailed as the future of automobiles, representing the future direction of vehicle development after internal combustion engines and electric vehicles. These vehicles use hydrogen and oxygen as energy sources, obtaining energy through a chemical reaction. Their main components include a hydrogen tank, a hydrogen fuel cell system, and a power control unit. The hydrogen fuel cell system, as the most crucial component, includes an air compressor (providing oxygen), a proton exchange membrane (facilitating the hydrogen-oxygen chemical reaction), a hydrogen pump (recovering unreacted hydrogen), and battery voltage conversion and management modules. Air compressor testing is an important research area. Existing air compressor test benches generally only involve testing under temperature-controlled conditions for the intake air, neglecting humidity control. However, air humidity is a critical parameter in hydrogen fuel cell systems; therefore, a fuel cell air compressor testing scheme that allows for controllable intake air temperature and humidity is needed. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model provides a test bench for a single-stage air compressor in a controllable humid hydrogen fuel cell system.

[0004] This utility model provides a test bench for a single-stage air compressor in a controllable wet hydrogen fuel cell system, comprising:

[0005] An air filter, the input end of which is used to receive air;

[0006] The first-stage temperature and humidity control box achieves temperature and humidity control based on electric heating and water spraying, and its input end is connected to the output end of the air filter.

[0007] The second-stage temperature and humidity control box achieves temperature and humidity control based on the mold temperature controller and water spraying, and its input end is connected to the output end of the first-stage temperature and humidity control box.

[0008] An intake pressure control valve, the input of which is connected to the output of the second-stage temperature and humidity control box;

[0009] An air flow meter, the input of which is connected to the output of the intake pressure control valve;

[0010] A single-stage air compressor, the input of which is connected to the output of the air flow meter;

[0011] The first intercooler has its input end connected to the output end of the single-stage air compressor.

[0012] The dehumidification control box achieves dehumidification by cooling the mold temperature controller, and its input terminal is connected to the output terminal of the first intercooler.

[0013] An exhaust control valve, the input of which is connected to the output of the dehumidification control box;

[0014] A muffler, the input of which is connected to the output of the exhaust control valve, the output of which is used for exhaust;

[0015] The inverter module has a DC input terminal for connecting to the DC power output from the hydrogen fuel cell, and an AC output terminal for electrically connecting to the power supply terminal of the single-stage air compressor.

[0016] In one possible implementation, it also includes a cooling gas control valve, a second intercooler, and a cooling gas flow meter;

[0017] The input end of the cooling gas control valve is connected to the connecting pipe between the dehumidification control box and the exhaust control valve, and its output end is connected to the input end of the second intercooler.

[0018] The output of the second intercooler is connected to the input of the cooling gas flow meter;

[0019] The output of the cooling gas flow meter is connected to the cooling gas input of the single-stage air compressor.

[0020] In one possible implementation, the second-stage temperature and humidity control box is provided with a first temperature control port group and a second temperature control port group;

[0021] The first temperature control port group and the second temperature control port group are each connected to a mold temperature controller to form two temperature control loops.

[0022] In one possible implementation, the single-stage air compressor, the first intercooler, the dehumidification control box, the second intercooler, and the inverter module are each connected to a mold temperature controller to construct their respective temperature control loops.

[0023] In one possible implementation, a first sensing module for detecting pressure, temperature, and humidity is installed on the connecting pipe where the output end of the air filter is located.

[0024] In one possible implementation, the output terminals of the first-stage temperature and humidity control box and the second-stage temperature and humidity control box are respectively equipped with a second sensing module and a third sensing module for detecting pressure, temperature and humidity on their respective connecting pipes.

[0025] In one possible implementation, a fourth sensing module for detecting pressure, temperature, and humidity is installed on the connecting pipe at the input end of the single-stage air compressor, and a fifth sensing module for detecting pressure and temperature is installed on the connecting pipe at its output end.

[0026] In one possible implementation, a sixth sensor module and a seventh sensor module for detecting pressure and temperature are respectively installed on the connecting pipes where the output ends of the first intercooler and the second intercooler are located.

[0027] In one possible implementation, an air compressor is installed on the connecting pipe where the output end of the air filter is located.

[0028] In one possible implementation, current sensors and voltage sensors are installed on the lines connecting the DC input terminal and AC output terminal of the inverter module.

[0029] The technical solution provided by this utility model has at least the following beneficial effects:

[0030] By combining the first-stage temperature and humidity control box, the second-stage temperature and humidity control box, and the dehumidification control box, humidity control can be performed in addition to temperature control of the air entering from the air filter. This effectively enriches the test scenarios and enables more comprehensive testing of single-stage air compressors in hydrogen fuel cell systems. Attached Figure Description

[0031] Figure 1 A schematic diagram of the structure of a single-stage air compressor test bench for a controllable humid hydrogen fuel cell system provided in this embodiment of the present invention;

[0032] In the attached diagram, 11 is an air filter; 12 is a first-stage temperature and humidity control box; 13 is a second-stage temperature and humidity control box; 14 is an intake pressure control valve; 15 is an air flow meter; 16 is a single-stage air compressor; 17 is a first intercooler; 18 is a dehumidification control box; 19 is an exhaust control valve; 20 is a muffler; 21 is an inverter module; 22 is a cooling gas control valve; 23 is a second intercooler; 24 is a cooling gas flow meter; 25 is a mold temperature controller; 26 is a first sensor module; 27 is a second sensor module; 28 is a third sensor module; 29 is a fourth sensor module; 30 is a fifth sensor module; 31 is a sixth sensor module; 32 is a seventh sensor module; and 33 is an air compressor. Detailed Implementation

[0033] To enhance understanding of this utility model, it will be described in further detail below with reference to the accompanying drawings and embodiments. These embodiments are only used to explain this utility model and do not limit the scope of protection of this utility model.

[0034] Please refer to Figure 1 This utility model provides a test bench for a single-stage air compressor in a controllable humid hydrogen fuel cell system, comprising:

[0035] Air filter 11, the inlet of which is used to input air;

[0036] The first-stage temperature and humidity control box 12 achieves temperature and humidity control based on electric heating and water spraying, and its input end is connected to the output end of the air filter 11.

[0037] The second-stage temperature and humidity control box 13 achieves temperature and humidity control based on the mold temperature controller and water spraying, and its input end is connected to the output end of the first-stage temperature and humidity control box 12.

[0038] The intake pressure control valve 14 has its input end connected to the output end of the second-stage temperature and humidity control box 13;

[0039] Air flow meter 15, the input end of which is connected to the output end of the intake pressure control valve 14;

[0040] A single-stage air compressor 16, the input of which is connected to the output of the air flow meter 15;

[0041] The first intercooler 17 has its input end connected to the output end of the single-stage air compressor 16;

[0042] The dehumidification control box 18 achieves dehumidification based on the cooling of the mold temperature controller, and its input terminal is connected to the output terminal of the first intercooler 17.

[0043] An exhaust control valve 19, the input of which is connected to the output of the dehumidification control box 18;

[0044] The muffler 20 has its input end connected to the output end of the exhaust control valve 19, and its output end is used for exhaust.

[0045] The inverter module 21 has a DC input terminal for connecting to the DC power output from the hydrogen fuel cell, and an AC output terminal for electrically connecting to the power supply terminal of the single-stage air compressor 16.

[0046] In this embodiment, the air filter 11 is a conventional air filter used to filter the input air. The first-stage temperature and humidity control box 12 is an air box with electric heating and water spray functions, which can achieve rapid heating and preliminary water spray to increase air humidity. The first-stage temperature and humidity control box 12 is a large box that can store incoming air. The second-stage temperature and humidity control box 13 is a smaller air box that can achieve small-range temperature control through a conventional mold temperature controller and can perform water spray again to achieve the required air humidity. The intake pressure control valve 14 can be a conventional model used to control the intake pressure. The valve opening can be controlled by the test system to simulate different intake pressures, achieving an intake pressure of 60~100Kpa (100Kpa is normal atmospheric pressure), simulating various intake conditions from high altitude to plain atmospheric pressure. The air flow meter 15 and the single-stage air compressor 16 can both be conventional models. The first intercooler 17 can be a conventional intercooler, which can achieve preliminary cooling of the high-temperature gas discharged from the single-stage air compressor 16. The dehumidification control box 18 is used for air dehumidification control. A transparent glass panel can be installed on the casing for easy observation of the internal conditions. A mold temperature controller is used to rapidly cool the interior, removing moisture from the gas and protecting subsequent air pipelines and equipment in the factory. The exhaust control valve 19 can be a standard model, simulating different exhaust back pressures and responding quickly to surge in the single-stage air compressor 16, protecting the compressor. The muffler 20 can be a standard full-frequency muffler. The inverter module 21 can be understood as the vehicle controller (Inverter) in new energy vehicles, also called an Inverter controller. It is used to invert DC power to three-phase AC power, and control air compressor speed, current, voltage, and power. In practical implementation, the inverter module 21 is connected to a computer, and the computer's testing system can set the operating conditions for automatic operation, meeting mass production factory testing requirements. This application uses a combination of electric heating, mold temperature controller, water spray, and air chamber to control temperature and humidity, and can be automatically adjusted by the corresponding testing system. It can achieve precise control of inlet air temperature and humidity with small fluctuations, and can simultaneously meet the different requirements of the test bench for test temperature and humidity.

[0047] In this application, the controllable humid hydrogen fuel cell system single-stage air compressor test bench is mainly used for performance testing, control, and automated testing of single-stage air compressors in hydrogen fuel cell systems after mass production. It can achieve closed-loop control of intake air temperature and humidity to meet different temperature and humidity test conditions of the air compressor (e.g., temperature range from 5 to 65°C, simulating the working conditions from low temperature in autumn and winter to high temperature in summer; humidity range from 20% to 100%, simulating the working conditions from dry environment to high humidity environment). It can also simultaneously adjust the intake air pressure of the air compressor in a closed loop (e.g., range from 60 to 100 kPa, 100 kPa corresponds to normal atmospheric pressure, simulating the intake working conditions from high altitude to plain atmospheric pressure). It can also simultaneously adjust the exhaust air pressure of the air compressor in a closed loop (e.g., range from 100 to 1000 kPa, simulating the working conditions of different exhaust resistance of the air compressor).

[0048] In one possible implementation, it also includes a cooling gas control valve 22, a second intercooler 23, and a cooling gas flow meter 24;

[0049] The input end of the cooling gas control valve 22 is connected to the connecting pipe between the dehumidification control box 18 and the exhaust control valve 19, and its output end is connected to the input end of the second intercooler 23.

[0050] The output terminal of the second intercooler 23 is connected to the input terminal of the cooling gas flow meter 24;

[0051] The output of the cooling gas flow meter 24 is connected to the cooling gas input of the single-stage air compressor 16.

[0052] In this embodiment, the single-stage air compressor 16 can employ a high-speed air bearing. The required cooling air is introduced through the second intercooler 23. The cooling air control valve 22 is controlled by the testing system, which automatically controls the valve opening according to the set cooling air volume to provide the required cooling air. The cooling air control valve 22 can control the flow of cooling air; it can be closed when not needed and adjusted according to the cooling air volume when needed to meet the requirements of different models of air compressors, i.e., the single-stage air compressor 16.

[0053] In one possible implementation, the second-stage temperature and humidity control box 13 is provided with a first temperature control port group and a second temperature control port group;

[0054] The first temperature control port group and the second temperature control port group are each connected to a mold temperature controller 25 to form two temperature control loops.

[0055] In this embodiment, the second-stage temperature and humidity control box 13 is equipped with a heat dissipation pipe controlled by the mold temperature controller 25, which facilitates the stabilization of the intake air temperature within a small range.

[0056] In one possible implementation, the single-stage air compressor 16, the first intercooler 17, the dehumidification control box 18, the second intercooler 23, and the inverter module 21 are each connected to a mold temperature controller 25 to construct their respective temperature control loops.

[0057] In this embodiment, the mold temperature controller 25 can be a conventional model, and its coolant can be conventional cooling water. Water can be supplied to the mold temperature controller 25 through a water pump in the water tank. The mold temperature controller 25 can achieve different temperature control and monitor the working status. After the test, the coolant pipeline can be emptied using compressed air supplied by the air source, and the coolant can be discharged from the pipeline into the water tank through compressed gas, avoiding contact between the somewhat toxic coolant and personnel and protecting personnel health.

[0058] In one possible implementation, a first sensing module 26 for detecting pressure, temperature, and humidity is provided on the connecting pipe where the output end of the air filter 11 is located.

[0059] In one possible implementation, the output terminals of the first-stage temperature and humidity control box 12 and the second-stage temperature and humidity control box 13 are respectively equipped with a second sensing module 27 and a third sensing module 28 for detecting pressure, temperature and humidity on their respective connecting pipes.

[0060] In one possible implementation, a fourth sensing module 29 for detecting pressure, temperature, and humidity is installed on the connecting pipe where the input end of the single-stage air compressor 16 is located, and a fifth sensing module 30 for detecting pressure and temperature is installed on the connecting pipe where its output end is located.

[0061] In one possible implementation, a sixth sensing module 31 and a seventh sensing module 32 for detecting pressure and temperature are respectively installed on the connecting pipes where the output ends of the first intercooler 17 and the second intercooler 23 are located.

[0062] In this embodiment, the first sensing module 26, the second sensing module 27, the third sensing module 28, and the fourth sensing module 29 can all be implemented based on conventional pressure sensor P, temperature sensor T, and humidity sensor H. The fifth sensing module 30, the sixth sensing module 31, and the seventh sensing module 32 can all be implemented based on conventional pressure sensor P and temperature sensor T. In specific implementation, the pressure sensor P, temperature sensor T, and humidity sensor H are connected to the testing system to achieve real-time monitoring of air pressure, temperature, and humidity. The system allows for inputting set temperatures, air pressures, and humidity levels to achieve automatic control of the inlet air temperature, pressure, and humidity, meeting the different requirements of the test bench for test temperature, test air pressure, and test humidity.

[0063] In one possible implementation, a compressor 33 is installed on the connecting pipe where the output end of the air filter 11 is located.

[0064] In this embodiment, the compressor 33 is a conventional model. After the test, the compressor 33 can send heated air into the test bench while the single-stage air compressor 16 is not working, and use the heated air to remove moisture from the pipeline.

[0065] In one possible implementation, a current sensor A and a voltage sensor V are provided on the lines connecting the DC input terminal and AC output terminal of the inverter module 21.

[0066] In this embodiment, both current sensor A and voltage sensor V can be conventional models. In specific implementation, AC protection can be installed on the AC line between inverter module 21 and single-stage air compressor 16, and DC insulation monitoring and protection can be installed on the DC line between inverter module 21 and DC power supply. By installing current sensor A and voltage sensor V, the corresponding sensor data is transmitted to a computer. Current, voltage, and other information can be viewed in the computer's testing system, and power, control angle, etc., can also be calculated. The corresponding parameters can be adjusted in the testing system to achieve monitoring and protection of AC current, AC voltage, AC leakage current, DC current, DC voltage, and DC insulation, thus protecting personnel and equipment safety. In actual operation, the temperature-controlled hydrogen fuel cell system single-stage air compressor test bench, in conjunction with the power control device, can directly cut off the power supply to the entire system when DC insulation failure or AC leakage is detected, achieving safety protection—equivalent to multi-layered protection for the entire system.

[0067] In one specific implementation, after air is filtered by air filter 11, the initial air pressure, temperature, and humidity of the current air are monitored and acquired by the first sensing module 26 and transmitted to the testing system. The testing system, by comparing the initial temperature with the set temperature and the initial humidity with the set humidity, can autonomously determine the following modes: If the set temperature is close to the initial temperature, the second-stage temperature and humidity control box 13 performs small-range temperature control through two mold temperature controllers 25; if the difference between the set temperature and the initial temperature is 10°C or more, the first-stage temperature and humidity control box 12 achieves large-range temperature control through an electric heating temperature control module, while the second-stage temperature and humidity control box 13 performs small-range temperature control; if the set humidity is greater than the initial humidity, the first-stage temperature and humidity control box 12 performs initial water spray control through a humidity spray control module. The second sensing module 27 is used to monitor the outlet air temperature, humidity, and air pressure of the first-stage temperature and humidity control box 12. If the outlet air humidity is still less than the set humidity, the second-stage temperature and humidity control box 13 can perform further water spray control through another humidity spray control module to make the outlet air humidity equal to the set humidity. The third sensor module 28 monitors the outlet air temperature, humidity, and pressure of the second-stage temperature and humidity control box 13. The fourth sensor module 29 monitors the air temperature, humidity, and pressure before processing by the single-stage air compressor 16. The fifth sensor module 30 monitors the air temperature and pressure after processing by the single-stage air compressor 16. The sixth sensor module 31 monitors the outlet air temperature and pressure of the first intercooler 17. After being pressurized by the single-stage air compressor 16, the air is cooled by the first intercooler 17. The dehumidification control box 18 is used for air dehumidification control. The exhaust control valve 19 can simulate different exhaust back pressures by controlling the valve opening, providing support for test conditions. Finally, the air is discharged into the factory air duct through the full-frequency silencer 20.

[0068] The above embodiments should not limit the present invention in any way. All technical solutions obtained by equivalent substitution or equivalent conversion fall within the protection scope of the present invention.

Claims

1. A test bench for a single-stage air compressor in a controllable wet hydrogen fuel cell system, characterized in that, include: An air filter, the input end of which is used to receive air; The first-stage temperature and humidity control box achieves temperature and humidity control based on electric heating and water spraying, and its input end is connected to the output end of the air filter. The second-stage temperature and humidity control box achieves temperature and humidity control based on the mold temperature controller and water spraying, and its input end is connected to the output end of the first-stage temperature and humidity control box. An intake pressure control valve, the input of which is connected to the output of the second-stage temperature and humidity control box; An air flow meter, the input of which is connected to the output of the intake pressure control valve; A single-stage air compressor, the input of which is connected to the output of the air flow meter; The first intercooler has its input end connected to the output end of the single-stage air compressor. The dehumidification control box achieves dehumidification by cooling the mold temperature controller, and its input terminal is connected to the output terminal of the first intercooler. An exhaust control valve, the input of which is connected to the output of the dehumidification control box; A muffler, the input of which is connected to the output of the exhaust control valve, the output of which is used for exhaust; The inverter module has a DC input terminal for connecting to the DC power output from the hydrogen fuel cell, and an AC output terminal for electrically connecting to the power supply terminal of the single-stage air compressor.

2. The test bench for a single-stage air compressor in a controllable humid hydrogen fuel cell system according to claim 1, characterized in that, It also includes a cooling gas control valve, a second intercooler, and a cooling gas flow meter; The input end of the cooling gas control valve is connected to the connecting pipe between the dehumidification control box and the exhaust control valve, and its output end is connected to the input end of the second intercooler. The output of the second intercooler is connected to the input of the cooling gas flow meter; The output of the cooling gas flow meter is connected to the cooling gas input of the single-stage air compressor.

3. The test bench for a single-stage air compressor in a controllable humid hydrogen fuel cell system according to claim 2, characterized in that, The second-stage temperature and humidity control box is equipped with a first temperature control port group and a second temperature control port group; The first temperature control port group and the second temperature control port group are each connected to a mold temperature controller to form two temperature control loops.

4. The test bench for a single-stage air compressor in a controllable humid hydrogen fuel cell system according to claim 2, characterized in that, The single-stage air compressor, the first intercooler, the dehumidification control box, the second intercooler, and the inverter module are each connected to a mold temperature controller to construct their respective temperature control loops.

5. The test bench for a single-stage air compressor in a controllable humid hydrogen fuel cell system according to claim 1, characterized in that, The air filter output end is connected to a first sensing module for detecting pressure, temperature, and humidity.

6. The test bench for a single-stage air compressor in a controllable humid hydrogen fuel cell system according to claim 5, characterized in that, The output terminals of the first-stage temperature and humidity control box and the second-stage temperature and humidity control box are respectively equipped with a second sensor module and a third sensor module for detecting pressure, temperature and humidity on their respective connecting pipes.

7. The test bench for a single-stage air compressor in a controllable wet hydrogen fuel cell system according to claim 1, characterized in that, The single-stage air compressor is equipped with a fourth sensor module for detecting pressure, temperature, and humidity on the connecting pipe at its input end, and a fifth sensor module for detecting pressure and temperature on the connecting pipe at its output end.

8. The test bench for a single-stage air compressor in a controllable wet hydrogen fuel cell system according to claim 2, characterized in that, The first intercooler and the second intercooler are respectively equipped with a sixth sensor module and a seventh sensor module for detecting pressure and temperature on the connecting pipes where the output ends are located.

9. The test bench for a single-stage air compressor in a controllable wet hydrogen fuel cell system according to claim 1, characterized in that, An air compressor is installed on the connecting pipe at the output end of the air filter.

10. The test bench for a single-stage air compressor in a controllable wet hydrogen fuel cell system according to claim 1, characterized in that, The inverter module is equipped with current sensors and voltage sensors on both the DC input and AC output lines.

Images