Temperature-controllable hydrogen fuel cell system single-stage air compressor test bench

Abstract

The utility model belongs to the technical field of fuel cell air compressor testing, and particularly relates to a temperature-controllable hydrogen fuel cell system single-stage air compressor test bench comprising an air filter used for inputting air; the first-stage temperature control box realizes temperature control based on electric heating and is connected to the air filter; the second-stage temperature control box realizes temperature control based on a mold temperature controller and is connected to the first-stage temperature control box; the air inlet pressure control valve is connected to the second-stage temperature 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; an exhaust control valve connected to the first intercooler; the silencer is connected to the exhaust control valve and used for exhausting; and the inversion module is used for accessing the direct current output by the hydrogen fuel cell and is electrically connected to the single-stage air compressor, so that a hydrogen fuel cell system single-stage air compressor test scheme with high temperature control precision 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 temperature-controlled 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, 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. Current air compressor test benches rely solely on heating wires for air heating, resulting in significant temperature control errors. 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 temperature-controlled hydrogen fuel cell system.

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

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

[0006] The first-stage temperature control box uses electric heating to achieve temperature control, and its input is connected to the output of the air filter.

[0007] The second-stage temperature control box uses a mold temperature controller to achieve temperature control, and its input is connected to the output of the first-stage temperature control box.

[0008] An intake pressure control valve, the input of which is connected to the output of the second-stage temperature 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] An exhaust control valve, the input of which is connected to the output of the first intercooler;

[0013] A muffler, the input of which is connected to the output of the exhaust control valve, the output of which is used for exhaust;

[0014] 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.

[0015] In one possible implementation, it also includes a cooling gas control valve, a second intercooler, and a cooling gas flow meter;

[0016] The input end of the cooling gas control valve is connected to the connecting pipe between the first intercooler and the exhaust control valve, and its output end is connected to the input end of the second intercooler.

[0017] The output of the second intercooler is connected to the input of the cooling gas flow meter;

[0018] The output of the cooling gas flow meter is connected to the cooling gas input of the single-stage air compressor.

[0019] In one possible implementation, the second-stage temperature control box is provided with a first temperature control port group and a second temperature control port group;

[0020] 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.

[0021] In one possible implementation, the single-stage air compressor, the first intercooler, the second intercooler, and the inverter module are each connected to a mold temperature controller to construct their respective temperature control loops.

[0022] In one possible implementation, a first sensing module for detecting pressure and temperature is installed on the connecting pipe where the output end of the air filter is located.

[0023] In one possible implementation, a second sensing module for detecting pressure and temperature is installed on the connecting pipe where the output end of the first-stage temperature control box is located.

[0024] In one possible implementation, a third sensing module for detecting pressure and temperature is installed on the connecting pipe where the output end of the second-stage temperature control box is located.

[0025] In one possible implementation, a fourth sensing module for detecting pressure and temperature 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 sensing module for detecting pressure and temperature is installed on the connecting pipe where the output end of the first intercooler is located.

[0027] 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.

[0028] The technical solution provided by this utility model has at least the following beneficial effects:

[0029] By combining a first-stage temperature control box based on electric heating and a second-stage temperature control box based on a mold temperature controller, the intake air can be heated in two different heating modes, effectively reducing temperature control errors and improving temperature control accuracy. Attached Figure Description

[0030] Figure 1 A schematic diagram of the structure of a single-stage air compressor test bench for a temperature-controlled hydrogen fuel cell system provided in this embodiment of the present invention;

[0031] In the attached diagram, 11 is an air filter; 12 is a first-stage temperature control box; 13 is a second-stage temperature 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 an exhaust control valve; 19 is a muffler; 20 is an inverter module; 21 is a cooling gas control valve; 22 is a second intercooler; 23 is a cooling gas flow meter; 24 is a mold temperature controller; 25 is a first sensor module; 26 is a second sensor module; 27 is a third sensor module; 28 is a fourth sensor module; 29 is a fifth sensor module; and 30 is a sixth sensor module. Detailed Implementation

[0032] 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.

[0033] Please refer to Figure 1 This utility model provides a test bench for a single-stage air compressor in a temperature-controlled hydrogen fuel cell system, comprising:

[0034] Air filter 11, the inlet of which is used to input air;

[0035] The first-stage temperature control box 12 achieves temperature control based on electric heating, and its input end is connected to the output end of the air filter 11.

[0036] The second-stage temperature control box 13 is based on the mold temperature controller to achieve temperature control, and its input end is connected to the output end of the first-stage temperature control box 12.

[0037] The intake pressure control valve 14 has its input end connected to the output end of the second-stage temperature control box 13;

[0038] Air flow meter 15, the input end of which is connected to the output end of the intake pressure control valve 14;

[0039] A single-stage air compressor 16, the input of which is connected to the output of the air flow meter 15;

[0040] The first intercooler 17 has its input end connected to the output end of the single-stage air compressor 16;

[0041] The exhaust control valve 18 has its input end connected to the output end of the first intercooler 17;

[0042] The muffler 19 has its input end connected to the output end of the exhaust control valve 18, and its output end is used for exhaust.

[0043] The inverter module 20 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.

[0044] In this embodiment, the air filter 11 is a conventional air filter used to filter the input air. The first-stage temperature control box 12 is an air box with electric heating function, which can achieve rapid heating and preliminary temperature control. The first-stage temperature control box 12 is a large box that can store the intake air. The second-stage temperature control box 13 is a smaller air box that can achieve precise heating to control the intake air temperature through a conventional temperature controller. 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 exhaust control valve 18 can be a standard model, capable of simulating different exhaust back pressures and responding quickly to protect the air compressor during surge in the single-stage air compressor 16. The muffler 19 can be a standard full-frequency muffler. The inverter module 20 can be understood as the vehicle controller (Inverter) in new energy vehicles, or simply an Inverter controller, used to realize the inversion of DC power to three-phase AC power, and control of air compressor speed, current, voltage, and power. In practical implementation, the inverter module 20 is connected to a computer, and the operating conditions can be set automatically by the test system on the computer to meet the mass production factory testing requirements. This application uses a combination of electric heating, mold temperature controller, and air chamber for temperature control, which can be automatically adjusted by the corresponding test system. The intake temperature is stable with small fluctuations and can achieve rapid temperature rise and fall, meeting the different test temperature requirements of the test bench.

[0045] In this application, the temperature-controlled 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 the intake air temperature to meet different temperature test conditions of the air compressor (e.g., a range of 5~65℃, simulating conditions from low temperatures in autumn and winter to high temperatures in summer). It can also simultaneously adjust the intake air pressure of the air compressor in a closed loop (e.g., a range of 60~100Kpa, where 100Kpa corresponds to normal atmospheric pressure, simulating intake conditions from high altitudes to plains). It can also simultaneously adjust the exhaust air pressure of the air compressor in a closed loop (e.g., a range of 100~1000Kpa, simulating different exhaust resistance conditions of the air compressor).

[0046] In one possible implementation, it also includes a cooling gas control valve 21, a second intercooler 22, and a cooling gas flow meter 23;

[0047] The input end of the cooling gas control valve 21 is connected to the connecting pipe between the first intercooler 17 and the exhaust control valve 18, and its output end is connected to the input end of the second intercooler 22.

[0048] The output terminal of the second intercooler 22 is connected to the input terminal of the cooling gas flow meter 23;

[0049] The output of the cooling gas flow meter 23 is connected to the cooling gas input of the single-stage air compressor 16.

[0050] 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 22. The cooling air control valve 21 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 21 can control the 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.

[0051] In one possible implementation, the second-stage temperature control box 13 is provided with a first temperature control port group and a second temperature control port group;

[0052] The first temperature control port group and the second temperature control port group are each connected to a mold temperature controller 24 to form two temperature control loops.

[0053] In this embodiment, the second-stage temperature control box 13 is equipped with a heat dissipation pipe controlled by the mold temperature controller 24, which facilitates the stabilization of the intake air temperature within a small range.

[0054] In one possible implementation, the single-stage air compressor 16, the first intercooler 17, the second intercooler 22, and the inverter module 20 are each connected to a mold temperature controller 24 to construct their respective temperature control loops.

[0055] In this embodiment, the mold temperature controller 24 can be a conventional model, and its coolant can be conventional cooling water. Water can be supplied to the mold temperature controller 24 through a water pump in the water tank. The mold temperature controller 24 can achieve different temperature control and monitor the working status. After the test, the coolant pipeline can be emptied by 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.

[0056] In one possible implementation, a first sensing module 25 for detecting pressure and temperature is provided on the connecting pipe where the output end of the air filter 11 is located.

[0057] In one possible implementation, a second sensing module 26 for detecting pressure and temperature is installed on the connecting pipe where the output end of the first-stage temperature control box 12 is located.

[0058] In one possible implementation, a third sensing module 27 for detecting pressure and temperature is installed on the connecting pipe where the output end of the second-stage temperature control box 13 is located.

[0059] In one possible implementation, a fourth sensing module 28 for detecting pressure and temperature is provided on the connecting pipe where the input end of the single-stage air compressor 16 is located, and a fifth sensing module 29 for detecting pressure and temperature is provided on the connecting pipe where its output end is located.

[0060] In one possible implementation, a sixth sensing module 30 for detecting pressure and temperature is provided on the connecting pipe where the output end of the first intercooler 17 is located.

[0061] In this embodiment, the first sensing module 25, the second sensing module 26, the third sensing module 27, the fourth sensing module 28, the fifth sensing module 29, and the sixth sensing module 30 can all be implemented based on conventional pressure sensors P and temperature sensors T. In specific implementation, the pressure sensor P and the temperature sensor T are connected to the testing system to realize real-time monitoring of air pressure and temperature. The set temperature and air pressure can be input into the testing system to realize automatic control of the intake air temperature and intake air pressure, meeting the different requirements of the test bench for test temperature and test air pressure.

[0062] In one possible implementation, a current sensor A and a voltage sensor V are provided on the lines connecting the DC input terminal and the AC output terminal of the inverter module 20.

[0063] 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 20 and single-stage air compressor 16, and DC insulation monitoring and protection can be installed on the DC line between inverter module 20 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.

[0064] In one specific implementation, after air is filtered by air filter 11, the initial temperature of the air is monitored and acquired by the first sensing module 25 and transmitted to the testing system. The testing system, by comparing the initial temperature with the set temperature, can autonomously determine the following modes: if the set temperature is lower than the initial temperature, cooling water is injected into the first-stage temperature control box 12 for cooling; if the set temperature is close to the initial temperature, the second-stage temperature control box 13 uses two mold temperature controllers 24 for small-range temperature control; if the difference between the set temperature and the initial temperature is 10°C or more, the first-stage temperature control box 12 uses an electric heating temperature control module to achieve large-range temperature control, while the second-stage temperature control box 13 performs small-range temperature control. The second sensing module 26 monitors the outlet air temperature and pressure of the first-stage temperature control box 12, and the third sensing module 27 monitors the outlet air temperature and pressure of the second-stage temperature control box 13. The fourth sensing module 28 and the fifth sensing module 29 monitor the temperature and pressure of the air before and after processing by the single-stage air compressor 16. The sixth sensing module 30 is used to monitor 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 exhaust control valve 18 can simulate different exhaust back pressures by controlling the valve opening, providing support for the test conditions. Finally, the air is discharged into the factory air duct through the full-frequency silencer 19.

[0065] 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 temperature-controlled 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 control box uses electric heating to achieve temperature control, and its input is connected to the output of the air filter. The second-stage temperature control box uses a mold temperature controller to achieve temperature control, and its input is connected to the output of the first-stage temperature control box. An intake pressure control valve, the input of which is connected to the output of the second-stage temperature 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. An exhaust control valve, the input of which is connected to the output of the first intercooler; 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 single-stage air compressor test bench for a temperature-controlled 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 first intercooler 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 single-stage air compressor test bench for a temperature-controlled hydrogen fuel cell system according to claim 2, characterized in that, The second-stage temperature 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 single-stage air compressor test bench for a temperature-controlled hydrogen fuel cell system according to claim 2, characterized in that, The single-stage air compressor, the first intercooler, the second intercooler, and the inverter module are each connected to a mold temperature controller to form their respective temperature control loops.

5. The single-stage air compressor test bench for a temperature-controlled 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 and temperature.

6. The single-stage air compressor test bench for a temperature-controlled hydrogen fuel cell system according to claim 5, characterized in that, A second sensing module for detecting pressure and temperature is installed on the connecting pipe where the output end of the first-stage temperature control box is located.

7. The single-stage air compressor test bench for a temperature-controlled hydrogen fuel cell system according to claim 6, characterized in that, A third sensing module for detecting pressure and temperature is installed on the connecting pipe where the output end of the second-stage temperature control box is located.

8. The single-stage air compressor test bench for a temperature-controlled hydrogen fuel cell system according to claim 1, characterized in that, The single-stage air compressor has a fourth sensing module for detecting pressure and temperature on the connecting pipe at its input end, and a fifth sensing module for detecting pressure and temperature on the connecting pipe at its output end.

9. The single-stage air compressor test bench for a temperature-controlled hydrogen fuel cell system according to claim 1, characterized in that, A sixth sensor module for detecting pressure and temperature is installed on the connecting pipe where the output end of the first intercooler is located.

10. The single-stage air compressor test bench for a temperature-controlled 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.

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