Fuel cell simulation system and method of operating the same

Abstract

The present invention provides a fuel cell simulation system and an operation method thereof, the simulation system comprising a power grid, a fuel cell simulator, a DC / DC converter and a power battery simulator connected in series, the power battery simulator circuit being connected to a water pump system simulator, a heating system simulator and an air compressor system simulator; and also comprising a host computer, the host computer being connected to the fuel cell simulator, the DC / DC converter, the power battery simulator, the water pump system simulator, the heating system simulator and the air compressor system simulator via CAN bus communication, the host computer being further connected to a measurement monitoring system via the CAN bus communication. The present invention can simulate the real operating environment of a fuel cell vehicle system, measure and debug the parameters of the components and communication modules matched to the fuel cell vehicle system, so as to ensure the stable operation of the vehicle when the components and communication modules are matched to the fuel cell vehicle system, thereby improving the test accuracy and efficiency.

Description

Technical Field

[0001] The present invention relates to a fuel cell system, and in particular to a fuel cell simulation system and an operation method thereof. Background Art

[0002] At present, the fuel cell simulation system in the prior art includes a fuel cell simulator, a DC / DC converter and a power battery simulator. The fuel cell simulator can simulate the polarization characteristic curve (volt-ampere characteristic curve) of the fuel cell. When the fuel cell simulation system is running, the current and voltage output by the DC / DC converter are measured according to the change of the polarization characteristic curve of the fuel cell simulator, so that the fuel cell simulator can measure the current or voltage harmonics of the DC / DC converter when it is running at different powers, thereby verifying the stability of the harmonic parameters applied to the fuel cell vehicle system.

[0003] Since the fuel cell vehicle system includes not only fuel cells, but also DC / DC converters, power batteries, water pumps, air compressors, and communication modules, etc. When the fuel cell vehicle system is running, current and voltage ripples will be generated when the components are working. These current and voltage ripples interfere with each other in the circuit. Under different working conditions, the current and voltage ripples of each component are different, and the degree of mutual interference is also different. Then, the values ​​of current harmonics and / or voltage harmonics when each component is running will be inconsistent with the values ​​obtained by the above-mentioned fuel cell simulation system, thereby affecting the stable operation of the vehicle in the fuel cell vehicle system. That is to say, when the fuel cell vehicle system is running, it is affected by the electromagnetic interference caused by the electrical stress and thermal stress between each other, thereby affecting the stability of the vehicle operation. In addition, in the fuel cell simulation system of the prior art, only the fuel cell simulator and the DC / DC converter participate in CAN communication. Therefore, when the CAN communication module is transplanted to a vehicle with a fuel cell system, it is also necessary to debug the CAN communication module with other components to solve the CAN communication interference problem between the water pump and the air compressor and between them and the fuel cell, DC / DC converter, and power battery.

[0004] Therefore, the output current or voltage harmonics of the DC / DC converter obtained by the above-mentioned fuel cell simulation system during operation cannot be reflected on the vehicle of the fuel cell vehicle system, and the output current or voltage harmonics of the DC / DC converter and the CAN communication module still need to be debugged again, thereby reducing the efficiency of the fuel cell vehicle system in testing the vehicle stability before leaving the factory. Summary of the invention

[0005] The purpose of the present invention is to provide a fuel cell simulation system and an operating method thereof to simulate the actual operating environment of a fuel cell vehicle system, measure and debug the parameters of components and communication modules matched to the fuel cell vehicle system, so as to ensure the stable operation of the vehicle when each component is matched to the fuel cell vehicle system, thereby improving the test accuracy and efficiency.

[0006] To achieve the above-mentioned purpose, the present invention provides a fuel cell simulation system, comprising a power grid, a fuel cell simulator, a DC / DC converter and a power battery simulator connected in series, wherein the power battery simulator circuit is connected to a water pump system simulator, a heating system simulator and an air compressor system simulator; and also comprises a host computer, wherein the host computer is connected to the fuel cell simulator, the DC / DC converter, the power battery simulator, the water pump system simulator, the heating system simulator and the air compressor system simulator via CAN bus communication, and the host computer is also connected to a measurement and monitoring system via the CAN bus communication.

[0007] Furthermore, in the fuel cell simulation system provided by the present invention, a CAN communication module is provided in the host computer, and the CAN communication module communicates with the fuel cell simulator, DC / DC converter, power battery simulator, water pump system simulator, heating system simulator, air compressor system simulator and measurement and monitoring system through the CAN bus.

[0008] Furthermore, in the fuel cell simulation system provided by the present invention, the power battery simulator is an AC / DC bidirectional converter.

[0009] Furthermore, in the fuel cell simulation system provided by the present invention, the water pump system simulator includes a water pump system, and the water pump system includes a water pump and a water pump controller to provide pumping transmission power for water in the fuel cell simulator.

[0010] Furthermore, in the fuel cell simulation system provided by the present invention, the air compressor system simulator includes an air compressor system, and the air compressor system includes an air compressor and an air compressor controller to provide compressed air for the fuel cell simulator.

[0011] Furthermore, in the fuel cell simulation system provided by the present invention, the heating system simulator includes a heating system, and the heating system includes a heating device, and the heating device is heated to accelerate the reaction of the reactor in the fuel cell simulator.

[0012] Furthermore, in the fuel cell simulation system provided by the present invention, the measurement and monitoring system includes a pressure sensor, a speed sensor, a temperature sensor, a voltage sensor and a current sensor.

[0013] To achieve the above object, the present invention further provides an operating method of the above fuel cell simulation system, comprising:

[0014] Step 1, the host computer performs self-check on the fuel cell simulator, DC / DC converter, power battery simulator, water pump system simulator, heating system simulator, air compressor system simulator and measurement monitoring system through the CAN bus;

[0015] Step 2, start the water pump system simulator and the air compressor system simulator by starting the power battery simulator, start the fuel cell simulator under the condition of power grid power supply, so as to provide energy supply for the DC voltage conversion of the DC / DC converter, and after the power battery simulator is charged through the DC / DC converter, feed back the energy to the grid and output high-frequency and / or low-frequency ripple of predetermined power; start the heating system simulator through the power battery simulator under low temperature conditions below the predetermined value, so as to stabilize the energy output of the fuel cell simulator;

[0016] Step 3, inputting voltage and current relationship parameters corresponding to the fuel cell polarization characteristic curve into the fuel cell simulator through the host computer, and loading load data associated with the fuel cell simulator into the water pump system simulator and the air compressor system simulator through the host computer; and controlling the heating system simulator to load load data associated with the fuel cell simulator under low temperature environment conditions below a predetermined value through the host computer;

[0017] Step 4, controlling the power battery simulator to output harmonic energy of a specific power through the host computer, wherein the harmonic energy can simulate the harmonics generated when the vehicle power battery is working.

[0018] Furthermore, the operating method of the fuel cell simulation system provided by the present invention further includes:

[0019] Step 5: Test the output voltage and current of the DC / DC converter by controlling the measurement and monitoring system through the host computer.

[0020] Furthermore, the operating method of the fuel cell simulation system provided by the present invention further includes:

[0021] Step 6, the communication quality of the fuel cell simulator, DC / DC converter, power battery simulator, water pump system simulator, heating system simulator, air compressor system simulator and measurement monitoring system is tested and debugged by the host computer.

[0022] Compared with the prior art, the fuel cell simulation system and the operation method thereof provided by the present invention participate in the operation of the fuel cell simulation system through the water pump system simulator, the heating system simulator and the air compressor system simulator, and participate in the communication of the fuel cell simulator, the DC / DC converter, the power battery simulator, the water pump system simulator, the heating system simulator, the air compressor system simulator and the measurement and monitoring system through the host computer. According to the electromagnetic interference between the components such as the fuel cell simulator, the DC / DC converter, the power battery simulator, the water pump system simulator, the heating system simulator, the air compressor system simulator and the measurement and monitoring system, as well as through the host computer and its When the communication module interferes with the communication of the fuel cell simulator, DC / DC converter, power battery simulator, water pump system simulator, heating system simulator, air compressor system simulator and measurement and monitoring system, the working performance and parameters of the fuel cell in the fuel cell simulation system, the DC / DC converter, the AC / DC bidirectional converter in the power battery simulator, the water pump system in the water pump system simulator, the heating system in the heating system simulator, the air compressor system in the air compressor system simulator, and each sensor and host computer and its communication module in the measurement and monitoring system are measured and debugged, so as to match each debugged component to the vehicle of the fuel cell vehicle system. The present invention can simulate the working environment of each component in the fuel cell vehicle system under electromagnetic interference, and comprehensively, truly and accurately measure and debug the working performance parameters and communication parameters of the fuel cell, DC / DC converter, power battery, water pump, heating device, air compressor and communication module matched to the fuel cell vehicle system, without the need for secondary debugging after installation on the vehicle, thereby improving the test accuracy and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a circuit schematic diagram of a fuel cell simulation system according to an embodiment of the present invention;

[0024] Figure 2 It is a circuit schematic diagram of the connection relationship between the host computer and the CAN bus in one embodiment of the present invention;

[0025] Figure 3 This is a diagram showing the relationship between the DC / DC converter current output measured by the fuel cell vehicle system;

[0026] Figure 4 It is a diagram showing the relationship between the current output of a DC / DC converter measured by a fuel cell simulation system according to an embodiment of the present invention;

[0027] Figure 5 The present invention is a diagram showing the relationship between the current output of a DC / DC converter measured by a test bench in the prior art.

[0028] As shown in the figure:

[0029] 200. Fuel cell simulation system, 201. Power grid, 202. Fuel cell simulator, 203. DC / DC converter, 204. Power battery simulator, 205. Water pump system simulator, 206. Heating system simulator, 207. Air compressor system simulator, 208. Measurement and monitoring system, 209. CAN bus, 210. Host computer, 211. Communication module. DETAILED DESCRIPTION

[0030] The fuel cell simulation system and its operation method proposed by the present invention are further described in detail below in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description and claims. It should be noted that the accompanying drawings are in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0031] Please refer to Figure 1 The fuel cell simulation system 200 provided in an embodiment of the present invention includes a power grid 201, a fuel cell simulator 202, a DC / DC converter 203, a power battery simulator 204, a water pump system simulator 205, a heating system simulator 206, an air compressor system simulator 207, a measurement and monitoring system 208, a CAN bus 209 and a host computer 210.

[0032] The power grid 201, fuel cell simulator 202, DC / DC converter 203 and power battery simulator 204 are connected in series; the power battery simulator 204 is connected to the water pump system simulator 205, heating system simulator 206 and air compressor system simulator 207. The host computer 210 is connected to the fuel cell simulator 202, DC / DC converter 203, power battery simulator 204, water pump system simulator 205, heating system simulator 206, air compressor system simulator 207 and measurement monitoring system 208 through the CAN bus 209. Please refer to Figure 2 A communication module 211 is provided in the host computer 210, and the communication module 211 communicates with the fuel cell simulator 202, the DC / DC converter 203, the power battery simulator 204, the water pump system simulator 205, the heating system simulator 206, the air compressor system simulator 207 and the measurement and monitoring system 208 through the CAN bus 209.

[0033] The voltage of the power grid 201 is 380V AC, the fuel of the fuel cell simulator 202 includes but is not limited to hydrogen and oxygen, which can output a polarization characteristic curve, the DC / DC converter 203 can be a boost type, a buck type or a buck-boost type in the fuel cell vehicle system, the power battery simulator 204 can be a bidirectional feedback electronic load such as an AC / DC bidirectional converter, the water pump system simulator 205 includes a water pump system of the fuel cell vehicle system, the water pump system includes a water pump and a water pump controller to provide pumping and transmission power for water and other fuels in the fuel cell simulator 202; the heating system simulator 206 includes a heating system of the fuel cell vehicle system, the heating system includes heating devices such as heating rods and heating coils, and the heating devices are heated to accelerate the reaction of the fuel reactor in the fuel cell simulator 202, so that the polarization characteristic curve output by the fuel cell simulator is stable; the air compressor system simulator 207 includes an air compressor of the fuel cell vehicle system to extract and compress air at a predetermined number of revolutions, so that the power output of the air compressor is associated with the power output of the fuel cell simulator. The host computer 210 includes but is not limited to vehicle controllers such as microcontrollers and computers.

[0034] Please refer to Figure 1 The measurement and monitoring system 208 of the embodiment of the present invention includes but is not limited to pressure sensors, speed sensors, temperature sensors, voltage sensors and other voltage measuring devices, and current sensors and other current measuring devices in the fuel cell vehicle system. The voltage measuring device and the current measuring device are used to measure the voltage and current respectively, especially to measure the voltage and current parameters corresponding to the DC / DC converter 203 and the power battery simulator 204 when they work under a certain polarization characteristic curve of the fuel cell simulator 202, so as to simulate the real environment of the fuel cell system, thereby obtaining the real, reliable and accurate volt-ampere characteristic curve of the DC / DC converter 203 and other components, so as to be directly applied to the operation of the whole vehicle. There is no need to debug the DC / DC converter 203 after it is installed in the vehicle, thereby saving work efficiency. The pressure sensor is used to measure the pressure of the air compressor system simulator 206 and the water pump system simulator 205; the temperature sensor is used to measure the ambient temperature, the reaction temperature of the fuel cell simulator 202, the heating temperature of the heating system simulator 206, and the working temperature of the fuel cell simulator 202 and the power battery simulator 204. The embodiment of the present invention includes a water pump system simulator 205, a heating system simulator 206, and an air compressor system simulator 207 to simulate the real environment of the fuel cell system, thereby measuring real, reliable, and accurate current, voltage, pressure, temperature and other parameters through the measurement and monitoring system 208, so as to be directly applied to the operation on the whole vehicle. The embodiment of the present invention is not limited to the above-mentioned internal measurement and monitoring system 208, and an external measurement device can also be used.

[0035] Please refer to Figure 1The operating principle of the fuel cell simulation system 200 of the embodiment of the present invention is as follows: the power grid 200 provides power supply to the fuel cell simulator 202, and the fuel cell simulator 202 adjusts the parameters of the output polarization characteristic curve through the host computer 210 when the water pump system simulator 205, the heating system simulator 206 and the air compressor system simulator 207 are running stably to ensure the stable output of the fuel cell simulator 202, and then charges the power battery simulator 204 after energy conversion through the DC / DC converter 203 to maintain the power battery simulator 204. The stability of output power, the power battery simulator 204 can convert the DC power output by the DCDC converter 203 into AC power and feed it back to the power grid 201 in the first aspect; the power battery simulator 204 can convert the AC power of the power grid 201 into DC power before and during startup to provide power supply for the water pump system simulator 205, the heating system simulator 206 and the air compressor system simulator 207 in the second aspect; the power battery simulator 204 outputs high-frequency and low-frequency ripples according to the instructions of the communication module 211 of the host computer 210 in the third aspect. The ripple refers to voltage or current ripple. The host computer 210 sends corresponding instructions to the water pump system simulator 205, the heating system simulator 206 and the air compressor system simulator 207 through the CAN bus 209 to put each component in a working or stopped state. The heating system simulator 206 needs to be started according to the working environment temperature. Under the premise of stable operation of the above-mentioned fuel cell simulation system 200, the host computer 210 controls the measurement monitoring system 208 through the CAN bus 209 to measure the voltage or current harmonics of the output end of the DC / DC converter 203. Since the fuel cell simulation system 200 of the embodiment of the present invention is provided with a water pump system simulator 205, a heating system simulator 206 and an air compressor system simulator 207, considering the electromagnetic interference effects such as mutual voltage, current and temperature between the fuel cell simulator 202 to the air compressor system simulator 207 and the host computer 210, whether it is the measurement and debugging of the output harmonics of the DC / DC converter 203, or the measurement and debugging of the communication quality of 202 to 208 by the communication module 211 in the host computer 210, both can truly simulate the parameter requirements of the fuel cell vehicle system.

[0036] The operation method of the fuel cell simulation system 200 according to the embodiment of the present invention is as follows:

[0037] Step 1, the host computer 210 controls the fuel cell simulator 202, the DC / DC converter 203, the power battery simulator 204, the water pump system simulator 205, the air compressor system simulator 207 and the measurement and monitoring system 208 to perform self-test through the CAN bus 209. The heating system simulator 206 can be self-tested under low temperature conditions. The power battery simulator 204 provides power supply for the water pump system simulator 205, the heating system simulator 206 and the air compressor system simulator 207.

[0038] Step 2, start the water pump system simulator 205 and the air compressor system simulator 207 by starting the power battery simulator 204, and start the fuel cell simulator 202 when the power grid 201 is powered to provide energy supply for the DC voltage conversion of the DC / DC converter 203. After the power battery simulator 204 is charged by the DC / DC converter 203, the energy is fed back to the grid 201; under low temperature conditions below a predetermined value, the heating system simulator 206 is started by the power battery simulator 204 to stabilize the energy output of the fuel cell simulator 202. The purpose of the power battery simulator 204 feeding back electrical energy to the grid 201 is to save energy and protect the environment and avoid energy waste. Under low temperature conditions, the heating system simulator 206 can also be started by the power battery simulator 204 to accelerate the reaction of the fuel cell simulator 202 so that the fuel cell simulator 202 can output stably.

[0039] Step 3, input the voltage and current relationship parameters corresponding to the fuel cell polarization characteristic curve into the fuel cell simulator 202 through the host computer 210, and load the load data associated with the fuel cell simulator 202 to the water pump system simulator 205 and the air compressor system simulator 207 through the host computer 210; under low temperature environment conditions below a predetermined value, control the heating system simulator 206 through the host computer 210 to load the load data associated with the fuel cell simulator 202.

[0040] Step 4: Control the power battery simulator 204 to output harmonic energy of a specific power through the host computer 210. The harmonic energy can simulate the harmonics generated when the power battery in the fuel cell vehicle system is working.

[0041] Step 5, the host computer 210 controls the measurement monitoring system 208 to test the electrical stress (current, current) and thermal stress (temperature) parameters output by the DC / DC converter 203. When the external measurement monitoring system is used, the measurement is performed directly without the need for control by the host computer 210. This step 5 can measure the electrical stress and thermal stress parameters of the DC / DC converter 203 in the fuel cell simulation system 200.

[0042] Step 6, the communication quality of the fuel cell simulator 202, DC / DC converter 203, power battery simulator 204, water pump system simulator 205, heating system simulator 206, air compressor system simulator 207 and measurement monitoring system 208 is detected and debugged by the host computer 210. This step 6 can simulate the communication quality of the communication module 211 of the fuel cell system in a real environment with electromagnetic interference conditions. Therefore, the communication module 211 can be directly transplanted into the fuel cell vehicle system for matching use, without the need to perform electromagnetic interference debugging again after transplantation into the fuel cell vehicle system.

[0043] The fuel cell simulation system 200 and the operation method thereof of the embodiment of the present invention can, during operation, detect electromagnetic interference between components such as the fuel cell simulator 202, the DC / DC converter 203, the power battery simulator 204, the water pump system simulator 205, the heating system simulator 206, the air compressor system simulator 207, and the measurement and monitoring system 208, as well as communication interference to the fuel cell simulator 202, the DC / DC converter 203, the power battery simulator 204, the water pump system simulator 205, the heating system simulator 206, the air compressor system simulator 207, and the measurement and monitoring system 208 through the host computer 210. Under the condition of the above, the working performance and parameters of the fuel cell in the fuel cell simulator 202, the DC / DC converter 203, the AC / DC bidirectional converter and other bidirectional feedback electronic loads in the power battery simulator 204, the water pump system in the water pump system simulator 205, the heating system in the heating system simulator 206, the air compressor system in the air compressor system simulator 207, the sensors in the measurement and monitoring system 208, and the host computer 210 and its communication module 211 are measured and debugged, so as to match the debugged components to the vehicle of the fuel cell vehicle system, so that the matched components can run stably on the vehicle of the fuel cell vehicle system. In particular, the current and voltage ripples of the DC / DC converter 203, the DC load in the power battery simulator 204 and the air compressor in the air compressor system simulator 207 that are matched to the vehicle of the fuel cell vehicle system are measured and debugged, so that the matched components can run stably on the vehicle of the fuel cell vehicle system. The present invention can simulate the working environment of each component in a fuel cell vehicle system under electromagnetic interference, and comprehensively, truly and accurately measure and debug the working performance parameters and communication parameters of the fuel cell, DC / DC converter, power battery, water pump system, heating system, air compressor system and communication module matched to the fuel cell vehicle system, without the need for secondary debugging after installation in the vehicle, thereby improving the test accuracy and efficiency. The fuel cell simulation system of the embodiment of the present invention can be used as a test platform. The matching relationship between the fuel cell simulation system and the fuel cell vehicle system is shown in Table 1.

[0044] Fuel Cell Simulation System Fuel cell vehicle systems Fuel Cells Fuel Cells DC / DC Converter DC / DC Converter AC / DC Bidirectional Converter Power battery Water pump system Water pump system Heating system Heating system Air compressor system Air compressor system Communication Module Communication Module sensor sensor

[0045] Table 1

[0046] Figure 3 The current output data waveform of the DC / DC converter 203 is actually tested on a fuel cell vehicle system (i.e., a real vehicle with a fuel cell system) under the conditions that the fuel cell simulator 202 outputs 350A / 150Vdc and the boost DC / DC transformer 203 outputs 500Vdc / 96A power. The horizontal axis is time in seconds, and the vertical axis is current in amperes. It can be seen that the current output of the DC / DC converter 203 on the real vehicle generates sinusoidal harmonics due to electromagnetic interference.

[0047] Figure 4 The figure shows the current output data waveform of the DC / DC converter 203 in the fuel cell simulation system of the embodiment of the present invention, when the fuel cell simulator 202 outputs 350A / 150Vdc and the boost DC / DC transformer 203 outputs 500Vdc / 96A power. The current output of the DC / DC converter 203 also generates sinusoidal harmonics due to electromagnetic interference. The horizontal axis is time in seconds, and the vertical axis is current in amperes. By comparison, it can be seen that Figure 4 and Figure 3 The current waveforms are basically the same. Therefore, the fuel cell simulation system of the embodiment of the present invention can simulate the working performance of each component in the fuel cell vehicle system and measure real and accurate data information, without the fuel cell vehicle system needing to control the vehicle to drive on the road before testing.

[0048] Figure 5 It shows that in the DC / DC converter test bench consisting of only the battery simulator 202, the DC / DC converter 203 and the power battery simulator 204, the current waveform data at the output end of the test boost DC / DC converter 203 is an ideal sine wave without harmonics. The horizontal axis is time in seconds, and the vertical axis is current in amperes. Figure 5 and Figure 4 , Figure 3 By comparison, Figure 5 The current waveform at the output end of the DC / DC converter 203 is idealized and does not have harmonics in an electromagnetic interference environment, so it cannot accurately reflect the current, voltage and other parameters of the fuel cell vehicle system during operation. Therefore, when it is installed in a fuel cell vehicle system, it affects the stable operation of the vehicle.

[0049] The above description is only a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any changes or modifications made by a person skilled in the art in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims of the present invention.

Claims

1. A method for operating a fuel cell simulation system, characterized in that: The operation method is applied to a fuel cell simulation system, which includes a power grid, a fuel cell simulator, a DC / DC converter and a power battery simulator connected in series, wherein the power battery simulator circuit is connected to a water pump system simulator, a heating system simulator and an air compressor system simulator; and further includes a host computer, wherein the host computer is connected to the fuel cell simulator, the DC / DC converter, the power battery simulator, the water pump system simulator, the heating system simulator and the air compressor system simulator via CAN bus communication, and the host computer is also connected to a measurement monitoring system via the CAN bus communication; The operation method comprises: Step 1, the host computer performs self-check on the fuel cell simulator, DC / DC converter, power battery simulator, water pump system simulator, heating system simulator, air compressor system simulator and measurement monitoring system through the CAN bus; Step 2, start the water pump system simulator and the air compressor system simulator by starting the power battery simulator, the water pump system simulator is used to provide pumping transmission power for the water in the fuel cell simulator, the air compressor system simulator is used to provide compressed air for the fuel cell simulator, start the fuel cell simulator under the power supply of the grid to provide energy supply for the DC voltage conversion of the DC / DC converter, after the power battery simulator is charged through the DC / DC converter, the energy is fed back to the grid and high-frequency and / or low-frequency ripples of a predetermined power are output; start the heating system simulator through the power battery simulator under low temperature conditions below a predetermined value to stabilize the energy output of the fuel cell simulator; Step 3, inputting voltage and current relationship parameters corresponding to the fuel cell polarization characteristic curve into the fuel cell simulator through the host computer, and loading load data associated with the fuel cell simulator into the water pump system simulator and the air compressor system simulator through the host computer; and controlling the heating system simulator to load load data associated with the fuel cell simulator under low temperature environment conditions below a predetermined value through the host computer; Step 4, controlling the power battery simulator to output harmonic energy of a specific power through the host computer, wherein the harmonic energy can simulate the harmonics generated when the vehicle power battery is working.

2. The operating method of the fuel cell simulation system according to claim 1, characterized in that: Also includes: Step 5: Test the output voltage and current of the DC / DC converter by controlling the measurement and monitoring system through the host computer.

3. The operating method of the fuel cell simulation system according to claim 1 or 2, characterized in that: Also includes: Step 6, the communication quality of the fuel cell simulator, DC / DC converter, power battery simulator, water pump system simulator, heating system simulator, air compressor system simulator and measurement monitoring system is tested and debugged by the host computer.

4. The operating method of the fuel cell simulation system according to claim 1, characterized in that: The host computer is provided with a CAN communication module, and the CAN communication module communicates with the fuel cell simulator, the DC / DC converter, the power battery simulator, the water pump system simulator, the heating system simulator, the air compressor system simulator and the measurement and monitoring system through the CAN bus.

5. The operating method of the fuel cell simulation system according to claim 1, characterized in that: The power battery simulator is an AC / DC bidirectional converter.

6. The operating method of the fuel cell simulation system according to claim 1, characterized in that: The water pump system simulator includes a water pump system, and the water pump system includes a water pump and a water pump controller.

7. The operating method of the fuel cell simulation system according to claim 1, characterized in that: The air compressor system simulator includes an air compressor system, and the air compressor system includes an air compressor and an air compressor controller.

8. The operating method of the fuel cell simulation system according to claim 1, characterized in that: The heating system simulator comprises a heating system, and the heating system comprises a heating device. The heating device is heated to accelerate the reaction of the reactor in the fuel cell simulator.

9. The operating method of the fuel cell simulation system according to claim 1, characterized in that: The measurement and monitoring system includes a pressure sensor, a speed sensor, a temperature sensor, a voltage sensor and a current sensor.

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