Multi-source hydrogen supply system based on 45MPa compressor and control method

Abstract

The invention relates to a multisource hydrogen supply system based on a 45MPa compressor and a control method, the system comprises a hydrogen long pipe trailer, a hydrogen compressor, a low-pressure hydrogen storage tank, a medium-pressure hydrogen storage tank, a high-pressure hydrogen storage tank and a hydrogen adding machine, the hydrogen compressor is connected with the hydrogen long pipe trailer through a hydrogen unloading pipeline, and a second hydrogen unloading pneumatic valve is arranged on the hydrogen unloading pipeline; the second hydrogen unloading pneumatic valve is connected with a third hydrogen unloading pneumatic valve in parallel, the third hydrogen unloading pneumatic valve is connected with a first pressure regulating valve in series, and a fourth hydrogen unloading pneumatic valve is arranged at an output port of the hydrogen compressor and connected with the hydrogen unloading pipeline through a bypass pipeline. A fifth hydrogen unloading pneumatic valve, a sixth hydrogen unloading pneumatic valve and a seventh hydrogen unloading pneumatic valve which are connected in parallel are arranged on the bypass pipeline, the sixth hydrogen unloading pneumatic valve is connected with a second pressure regulating valve in series, the seventh hydrogen unloading pneumatic valve is connected with a third pressure regulating valve in series, and the fourth hydrogen unloading pneumatic valve is connected with a low-pressure hydrogen storage tank, a medium-pressure hydrogen storage tank and a high-pressure hydrogen storage tank through hydrogen storage pipelines respectively. The device has the advantages of being simple in structure, high in functionality and good in adaptability.

Description

Technical Field

[0001] The present invention relates to a hydrogen refueling station, and in particular to a multi-source hydrogen supply system based on a 45MPa compressor, and a control method for the hydrogen supply system. Background Art

[0002] Hydrogen energy is an efficient, clean, and sustainable secondary energy source. As the most promising energy source, it is receiving increasing attention and development worldwide. Currently, hydrogen refueling stations in my country primarily utilize a 20MPa tube trailer system for transporting external hydrogen. This system uses a 45MPa compressor to pressurize the hydrogen output from the 20MPa tube trailer and stores it in 30MPa low-pressure hydrogen storage tanks, 35MPa medium-pressure hydrogen storage tanks, and 45MPa high-pressure hydrogen storage tanks. These low-pressure, medium-pressure, and high-pressure hydrogen storage tanks are then used to refuel hydrogen fuel cell vehicles. In practice, this solution suffers from low hydrogen unloading rates, high hydrogen supply costs, and poor economic benefits. These issues are primarily manifested in the following ways: Because the 45MPa compressor's inlet pressure is required to be between 5MPa and 20MPa, theoretically, hydrogen cannot be unloaded if the output pressure of a 20MPa tube trailer falls below 5MPa. However, in practice, the station stops unloading hydrogen when the output pressure of a 20MPa tube trailer falls below 7MPa, resulting in a hydrogen unloading rate of only around 65%. This is due in part to the very slow hydrogen unloading rate. Furthermore, the 45MPa compressor's significantly increased compression ratio and temperature rise significantly increase power consumption and shorten its service life. Furthermore, the 45MPa compressor, designed specifically for hydrogen supply from 20MPa tube trailers, accounts for 50% to 60% of the total equipment value of the hydrogen refueling station. Replacing the compressor with a new model to accommodate tube trailers with different operating pressures requires a complete redesign, resulting in costly equipment modifications and increased site requirements. Summary of the Invention

[0003] The purpose of the present invention is to provide a multi-source hydrogen supply system and control method based on a 45MPa compressor. The hydrogen supply system has the advantages of simple structure, strong functionality and good adaptability; the control method has the advantages of simple process, stability and reliability.

[0004] In order to solve the above problems existing in the prior art, the present invention provides a multi-source hydrogen supply system based on a 45MPa compressor, comprising a hydrogen tube trailer, a hydrogen compressor, a low-pressure hydrogen storage tank, a medium-pressure hydrogen storage tank, a high-pressure hydrogen storage tank and a hydrogenator, wherein the hydrogen compressor is a 45MPa compressor, the input port of the hydrogen compressor is connected to the hydrogen tube trailer through a hydrogen unloading pipeline, and the direction of the hydrogen unloading pipeline from the hydrogen tube trailer to the hydrogen compressor is sequentially provided with a manual master control valve, a first hydrogen unloading pneumatic valve and a second hydrogen unloading pneumatic valve, and a second hydrogen unloading pneumatic valve. The pneumatic valve is connected in parallel with a third hydrogen unloading pneumatic valve, which is connected in series with a first pressure regulating valve. The output port of the hydrogen compressor is provided with a fourth hydrogen unloading pneumatic valve. The outlet of the fourth hydrogen unloading pneumatic valve is connected to the hydrogen unloading pipeline between the first hydrogen unloading pneumatic valve and the second hydrogen unloading pneumatic valve through a bypass line. The bypass line is provided with a fifth hydrogen unloading pneumatic valve, a sixth hydrogen unloading pneumatic valve and a seventh hydrogen unloading pneumatic valve connected in parallel with each other. The sixth hydrogen unloading pneumatic valve is connected in series with a second pressure regulating valve, and the seventh hydrogen unloading pneumatic valve is connected in series with a third pressure regulating valve. The low-pressure hydrogen storage tank is connected to the low-pressure hydrogen storage pipeline. The outlet of the fourth hydrogen unloading pneumatic valve is connected, the low-pressure hydrogen storage pipeline is provided with a first hydrogen storage pneumatic valve and a second hydrogen storage pneumatic valve, the medium-pressure hydrogen storage tank is connected to the outlet of the fourth hydrogen unloading pneumatic valve through a medium-pressure hydrogen storage pipeline, a third hydrogen storage pneumatic valve and a fourth hydrogen storage pneumatic valve are provided on the medium-pressure hydrogen storage pipeline, the high-pressure hydrogen storage tank is connected to the outlet of the fourth hydrogen unloading pneumatic valve through a high-pressure hydrogen storage pipeline, a fifth hydrogen storage pneumatic valve and a sixth hydrogen storage pneumatic valve are provided on the high-pressure hydrogen storage pipeline, the input port of the hydrogenator is connected to the first hydrogen storage pneumatic valve and the second hydrogen storage pneumatic valve through a low-pressure hydrogenation pipeline The low-pressure hydrogen storage pipeline between the hydrogen storage pneumatic valves is connected, a first hydrogenation pneumatic valve is provided on the low-pressure hydrogenation pipeline, the input port of the hydrogenator is connected to the medium-pressure hydrogen storage pipeline between the third hydrogen storage pneumatic valve and the fourth hydrogen storage pneumatic valve through the medium-pressure hydrogenation pipeline, a second hydrogenation pneumatic valve is provided on the medium-pressure hydrogenation pipeline, the input port of the hydrogenator is connected to the high-pressure hydrogen storage pipeline between the fifth hydrogen storage pneumatic valve and the sixth hydrogen storage pneumatic valve through the high-pressure hydrogenation pipeline, a third hydrogenation pneumatic valve is provided on the high-pressure hydrogenation pipeline, and the output port of the hydrogenator is connected to the hydrogenation gun through a hydrogenation hose.

[0005] Furthermore, the present invention provides a multi-source hydrogen supply system based on a 45MPa compressor, wherein a first pressure sensor is provided on the hydrogen unloading pipeline between the manual master control valve and the first hydrogen unloading pneumatic valve, and a second pressure sensor, a third pressure sensor and a fourth pressure sensor are provided on the low-pressure hydrogen storage tank, the medium-pressure hydrogen storage tank and the high-pressure hydrogen storage tank respectively; the first pressure regulating valve is used to adjust the output pressure of the hydrogen tube trailer to 20MPa, the second pressure regulating valve is used to adjust the output pressure of the hydrogen tube trailer to 35MPa, and the third pressure regulating valve is used to adjust the output pressure of the hydrogen tube trailer to 30MPa.

[0006] Based on the same concept, the present invention also provides a control method for the above-mentioned multi-source hydrogen supply system. In the initial state, except for the manual master control valve and the first hydrogen unloading pneumatic valve, which are in the open state, all other valves are in the closed state. When the output pressure of the hydrogen tube trailer is greater than 35 MPa and less than or equal to 50 MPa, the system operates in pressure regulation mode one; when the output pressure of the hydrogen tube trailer is greater than 30 MPa and less than or equal to 35 MPa, the system operates in pressure regulation mode two; when the output pressure of the hydrogen tube trailer is greater than 25 MPa and less than or equal to 30 MPa, the system operates in pressure regulation mode three; when the output pressure of the hydrogen tube trailer is greater than 20 MPa and less than or equal to 25 MPa, the system operates in pressure regulation mode four; when the output pressure of the hydrogen tube trailer is greater than 7 MPa and less than or equal to 20 MPa, the system operates in normal mode.

[0007] Furthermore, the present invention provides a control method for a multi-source hydrogen supply system, wherein the first pressure regulation mode comprises the following steps:

[0008] S1-1. When the pressure of the high-pressure hydrogen storage tank is lower than 35 MPa, open the fifth hydrogen unloading pneumatic valve, the fifth hydrogen storage pneumatic valve, and the sixth hydrogen storage pneumatic valve until the pressure of the high-pressure hydrogen storage tank rises to 45 MPa or equal to the output pressure of the hydrogen tube trailer;

[0009] S1-2. When the pressure of the medium-pressure hydrogen storage tank is lower than 30 MPa, open the sixth hydrogen unloading pneumatic valve, the third hydrogen storage pneumatic valve, and the fourth hydrogen storage pneumatic valve until the pressure of the medium-pressure hydrogen storage tank rises to 35 MPa;

[0010] S1-3. When the pressure of the low-pressure hydrogen storage tank is lower than 25 MPa, open the seventh hydrogen unloading pneumatic valve, the first hydrogen storage pneumatic valve and the second hydrogen storage pneumatic valve until the pressure of the low-pressure hydrogen storage tank rises to 30 MPa.

[0011] Furthermore, the present invention provides a control method for a multi-source hydrogen supply system, wherein the first pressure regulation mode further comprises the following steps:

[0012] S1-4. When the pressure of the onboard hydrogen storage tank is lower than 20 MPa, connect the hydrogen filling gun to the hydrogen fuel cell vehicle and open the first hydrogen filling pneumatic valve and the second hydrogen storage pneumatic valve;

[0013] S1-5. When the pressure of the onboard hydrogen storage tank rises to 25 MPa, close the first hydrogenation pneumatic valve and the second hydrogen storage pneumatic valve, and open the second hydrogenation pneumatic valve and the fourth hydrogen storage pneumatic valve;

[0014] S1-6. When the pressure of the onboard hydrogen storage tank rises to 30 MPa, close the second hydrogenation pneumatic valve and the fourth hydrogen storage pneumatic valve, and open the third hydrogenation pneumatic valve, the fifth hydrogen storage pneumatic valve, and the fifth hydrogen unloading pneumatic valve;

[0015] S1-7. When the pressure of the onboard hydrogen storage tank rises to 35 MPa, close the third hydrogen filling pneumatic valve, the fifth hydrogen storage pneumatic valve, and the fifth hydrogen unloading pneumatic valve, and disconnect the hydrogen filling gun from the hydrogen fuel cell vehicle;

[0016] The on-board hydrogen storage tank refers to a hydrogen storage tank on the hydrogen fuel cell vehicle (100), and connecting the hydrogen refueling gun (64) to the hydrogen fuel cell vehicle (100) refers to connecting the hydrogen refueling gun (64) to the on-board hydrogen storage tank.

[0017] Furthermore, the present invention provides a control method for a multi-source hydrogen supply system, wherein the second pressure regulation mode comprises the following steps:

[0018] S2-1. When the pressure of the high-pressure hydrogen storage tank is lower than 40 MPa, open the third hydrogen unloading pneumatic valve, the fourth hydrogen unloading pneumatic valve, the fifth hydrogen storage pneumatic valve, and the sixth hydrogen storage pneumatic valve, and start the hydrogen compressor until the pressure of the high-pressure hydrogen storage tank rises to 45 MPa;

[0019] S2-2. When the pressure of the low-pressure hydrogen storage tank is lower than 25 MPa, open the seventh hydrogen unloading pneumatic valve, the first hydrogen storage pneumatic valve and the second hydrogen storage pneumatic valve until the pressure of the low-pressure hydrogen storage tank rises to 30 MPa.

[0020] Furthermore, in the control method of a multi-source hydrogen supply system of the present invention, the second pressure regulation mode further includes the following steps:

[0021] S2-3. When the pressure of the onboard hydrogen storage tank is lower than 20 MPa, connect the hydrogen filling gun to the hydrogen fuel cell vehicle and open the first hydrogen filling pneumatic valve and the second hydrogen storage pneumatic valve;

[0022] S2-4. When the pressure of the onboard hydrogen storage tank rises to 25 MPa, close the first hydrogenation pneumatic valve and the second hydrogenation pneumatic valve, and open the second hydrogenation pneumatic valve, the third hydrogenation pneumatic valve, and the fifth hydrogenation pneumatic valve;

[0023] S2-5. When the pressure of the onboard hydrogen storage tank rises to 30 MPa, close the second hydrogenation pneumatic valve, the third hydrogen storage pneumatic valve, and the fifth hydrogen unloading pneumatic valve, and open the third hydrogenation pneumatic valve and the sixth hydrogen storage pneumatic valve;

[0024] S2-6. When the pressure of the onboard hydrogen storage tank rises to 35 MPa, close the third hydrogenation pneumatic valve and the sixth hydrogen storage pneumatic valve, and disconnect the hydrogenation gun from the hydrogen fuel cell vehicle.

[0025] Furthermore, the present invention provides a control method for a multi-source hydrogen supply system, wherein the voltage regulation mode three comprises the following steps:

[0026] S3-1. When the pressure of the high-pressure hydrogen storage tank is lower than 40 MPa, open the third hydrogen unloading pneumatic valve, the fourth hydrogen unloading pneumatic valve, the fifth hydrogen storage pneumatic valve, and the sixth hydrogen storage pneumatic valve, and start the hydrogen compressor until the pressure of the high-pressure hydrogen storage tank rises to 45 MPa;

[0027] S3-2. When the pressure of the medium-pressure hydrogen storage tank is lower than 30 MPa, open the third hydrogen unloading pneumatic valve, the fourth hydrogen unloading pneumatic valve, the third hydrogen storage pneumatic valve, and the fourth hydrogen storage pneumatic valve, and start the hydrogen compressor until the pressure of the medium-pressure hydrogen storage tank rises to 35 MPa;

[0028] S3-3. When the pressure of the low-pressure hydrogen storage tank is lower than 25 MPa, open the fifth hydrogen unloading pneumatic valve, the first hydrogen storage pneumatic valve, and the second hydrogen storage pneumatic valve until the pressure of the low-pressure hydrogen storage tank rises to 30 MPa or equal to the output pressure of the hydrogen tube trailer;

[0029] S3-4. When the pressure of the onboard hydrogen storage tank is lower than 20 MPa, connect the hydrogen filling gun to the hydrogen fuel cell vehicle and open the first hydrogen filling pneumatic valve, the first hydrogen storage pneumatic valve and the fifth hydrogen unloading pneumatic valve;

[0030] S3-5. When the pressure of the onboard hydrogen storage tank rises to 25 MPa, close the first hydrogenation pneumatic valve, the first hydrogen storage pneumatic valve, and the fifth hydrogen unloading pneumatic valve, and open the second hydrogenation pneumatic valve and the fourth hydrogen storage pneumatic valve;

[0031] S3-6. When the pressure of the onboard hydrogen storage tank rises to 30 MPa, close the second hydrogenation pneumatic valve and the fourth hydrogen storage pneumatic valve, and open the third hydrogenation pneumatic valve and the sixth hydrogen storage pneumatic valve;

[0032] S3-7. When the pressure of the on-board hydrogen storage tank rises to 35 MPa, close the third hydrogenation pneumatic valve and the sixth hydrogen storage pneumatic valve, and disconnect the hydrogenation gun from the hydrogen fuel cell vehicle.

[0033] Furthermore, the present invention provides a control method for a multi-source hydrogen supply system, wherein the voltage regulation mode 4 includes the following steps:

[0034] S4-1, opening the third hydrogen unloading pneumatic valve and the fourth hydrogen unloading pneumatic valve;

[0035] S4-2. When the pressure of the high-pressure hydrogen storage tank is lower than 40 MPa, open the fifth hydrogen storage pneumatic valve and the sixth hydrogen storage pneumatic valve, and start the hydrogen compressor until the pressure of the high-pressure hydrogen storage tank rises to 45 MPa;

[0036] S4-3. When the pressure of the medium-pressure hydrogen storage tank is lower than 30 MPa, open the third hydrogen storage pneumatic valve and the fourth hydrogen storage pneumatic valve, and start the hydrogen compressor until the pressure of the medium-pressure hydrogen storage tank rises to 35 MPa;

[0037] S4-4. When the pressure of the low-pressure hydrogen storage tank is lower than 25 MPa, open the first hydrogen storage pneumatic valve and the second hydrogen storage pneumatic valve, and start the hydrogen compressor until the pressure of the low-pressure hydrogen storage tank rises to 30 MPa;

[0038] S4-5. When the pressure of the onboard hydrogen storage tank is lower than 20 MPa, connect the hydrogen filling gun to the hydrogen fuel cell vehicle and open the first hydrogen filling pneumatic valve and the second hydrogen storage pneumatic valve;

[0039] S4-6. When the pressure of the onboard hydrogen storage tank rises to 25 MPa, close the first hydrogenation pneumatic valve and the second hydrogen storage pneumatic valve, and open the second hydrogenation pneumatic valve and the fourth hydrogen storage pneumatic valve;

[0040] S4-7. When the pressure of the onboard hydrogen storage tank rises to 30 MPa, close the second hydrogenation pneumatic valve and the fourth hydrogen storage pneumatic valve, and open the third hydrogenation pneumatic valve and the sixth hydrogen storage pneumatic valve;

[0041] S4-8. When the pressure of the on-board hydrogen storage tank rises to 35 MPa, close the third hydrogenation pneumatic valve and the sixth hydrogen storage pneumatic valve, and disconnect the hydrogenation gun from the hydrogen fuel cell vehicle.

[0042] Furthermore, the present invention provides a control method for a multi-source hydrogen supply system, wherein the conventional mode comprises the following steps:

[0043] S5-1, opening the second hydrogen unloading pneumatic valve and the fourth hydrogen unloading pneumatic valve;

[0044] S5-2. When the pressure of the high-pressure hydrogen storage tank is lower than 40 MPa, open the fifth hydrogen storage pneumatic valve and the sixth hydrogen storage pneumatic valve, and start the hydrogen compressor until the pressure of the high-pressure hydrogen storage tank rises to 45 MPa;

[0045] S5-3. When the pressure of the medium-pressure hydrogen storage tank is lower than 30 MPa, open the third hydrogen storage pneumatic valve and the fourth hydrogen storage pneumatic valve, and start the hydrogen compressor until the pressure of the medium-pressure hydrogen storage tank rises to 35 MPa;

[0046] S5-4. When the pressure of the low-pressure hydrogen storage tank is lower than 25 MPa, open the first hydrogen storage pneumatic valve and the second hydrogen storage pneumatic valve, and start the hydrogen compressor until the pressure of the low-pressure hydrogen storage tank rises to 30 MPa;

[0047] S5-5. When the pressure of the onboard hydrogen storage tank is lower than 20 MPa, connect the hydrogen filling gun to the hydrogen fuel cell vehicle and open the first hydrogen filling pneumatic valve and the second hydrogen storage pneumatic valve;

[0048] S5-6. When the pressure of the onboard hydrogen storage tank rises to 25 MPa, close the first hydrogenation pneumatic valve and the second hydrogen storage pneumatic valve, and open the second hydrogenation pneumatic valve and the fourth hydrogen storage pneumatic valve;

[0049] S5-7. When the pressure of the onboard hydrogen storage tank rises to 30 MPa, close the second hydrogenation pneumatic valve and the fourth hydrogen storage pneumatic valve, and open the third hydrogenation pneumatic valve and the sixth hydrogen storage pneumatic valve;

[0050] S5-8. When the pressure of the onboard hydrogen storage tank rises to 35 MPa, close the third hydrogenation pneumatic valve and the sixth hydrogen storage pneumatic valve, and disconnect the hydrogenation gun from the hydrogen fuel cell vehicle.

[0051] Compared with the prior art, the multi-source hydrogen supply system and control method based on a 45MPa compressor of the present invention has the following advantages: the present invention is provided with a hydrogen tube trailer, a hydrogen compressor, a low-pressure hydrogen storage tank, a medium-pressure hydrogen storage tank, a high-pressure hydrogen storage tank and a hydrogenator, wherein the hydrogen compressor is a 45MPa compressor, and the input port of the hydrogen compressor is connected to the hydrogen tube trailer through a hydrogen unloading pipeline, and a manual master control valve, a first hydrogen unloading pneumatic valve and a second hydrogen unloading pneumatic valve are sequentially provided on the hydrogen unloading pipeline from the hydrogen tube trailer to the hydrogen compressor, so that the second The hydrogen unloading pneumatic valve is connected in parallel with the third hydrogen unloading pneumatic valve, and the third hydrogen unloading pneumatic valve is connected in series with the first pressure regulating valve. A fourth hydrogen unloading pneumatic valve is set at the output port of the hydrogen compressor, and the outlet of the fourth hydrogen unloading pneumatic valve is connected to the hydrogen unloading pipeline between the first hydrogen unloading pneumatic valve and the second hydrogen unloading pneumatic valve through a bypass pipeline. A fifth hydrogen unloading pneumatic valve, a sixth hydrogen unloading pneumatic valve and a seventh hydrogen unloading pneumatic valve are set in parallel on the bypass pipeline, and the sixth hydrogen unloading pneumatic valve is connected in series with the second pressure regulating valve, and the seventh hydrogen unloading pneumatic valve is connected in series with the third pressure regulating valve, so that the low-pressure hydrogen storage tank is connected to the low-pressure hydrogen storage pipeline through the low-pressure hydrogen storage pipeline. The outlet of the fourth hydrogen unloading pneumatic valve is connected, and the first hydrogen storage pneumatic valve and the second hydrogen storage pneumatic valve are set on the low-pressure hydrogen storage pipeline, the medium-pressure hydrogen storage tank is connected to the outlet of the fourth hydrogen unloading pneumatic valve through the medium-pressure hydrogen storage pipeline, and the third hydrogen storage pneumatic valve and the fourth hydrogen storage pneumatic valve are set on the medium-pressure hydrogen storage pipeline, the high-pressure hydrogen storage tank is connected to the outlet of the fourth hydrogen unloading pneumatic valve through the high-pressure hydrogen storage pipeline, and the fifth hydrogen storage pneumatic valve and the sixth hydrogen storage pneumatic valve are set on the high-pressure hydrogen storage pipeline, and the input port of the hydrogenator is connected to the first hydrogen storage pneumatic valve and the second hydrogen storage pneumatic valve through the low-pressure hydrogenation pipeline. The low-pressure hydrogen storage pipeline between the valves is connected, and a first hydrogenation pneumatic valve is set on the low-pressure hydrogenation pipeline, so that the input port of the hydrogenator is connected to the medium-pressure hydrogen storage pipeline between the third hydrogen storage pneumatic valve and the fourth hydrogen storage pneumatic valve through the medium-pressure hydrogenation pipeline, and a second hydrogenation pneumatic valve is set on the medium-pressure hydrogenation pipeline, so that the input port of the hydrogenator is connected to the high-pressure hydrogen storage pipeline between the fifth hydrogen storage pneumatic valve and the sixth hydrogen storage pneumatic valve through the high-pressure hydrogenation pipeline, and a third hydrogenation pneumatic valve is set on the high-pressure hydrogenation pipeline, and the output port of the hydrogenator is connected to a hydrogenation gun through a hydrogenation hose. This constitutes a multi-source hydrogen supply system based on a 45MPa compressor. In actual application, the hydrogen supply system selects different operating modes according to the different output pressure ranges of the hydrogen long tube trailer, thereby improving functionality and adaptability, and has the characteristics of simple structure and low cost.The present invention is based on an existing hydrogen refueling station and its 45MPa compressor. A second hydrogen unloading pneumatic valve and a fourth hydrogen unloading pneumatic valve are correspondingly arranged at the input and output ports of the hydrogen compressor, the second hydrogen unloading pneumatic valve is connected in parallel to the third hydrogen unloading pneumatic valve, and the third hydrogen unloading pneumatic valve is connected in series to the first pressure-regulating valve. At the same time, the outlet of the fourth hydrogen unloading pneumatic valve is connected to the hydrogen unloading pipeline in front of the second hydrogen unloading pneumatic valve through a bypass line, and a fifth hydrogen unloading pneumatic valve, a sixth hydrogen unloading pneumatic valve and a seventh hydrogen unloading pneumatic valve are arranged in parallel on the bypass line, and the sixth hydrogen unloading pneumatic valve is connected in series to the second pressure-regulating valve, and the seventh hydrogen unloading pneumatic valve is connected in series to the third pressure-regulating valve, thereby realizing multi-source comprehensive application of 20MPa long tube trailers, 30MPa long tube trailers and 50MPa long tube trailers. When the hydrogen tube trailer is a 50MPa tube trailer and its output pressure is greater than 35MPa, the bypass pipeline is used and the fifth hydrogen unloading pneumatic valve, the sixth hydrogen unloading pneumatic valve and the seventh hydrogen unloading pneumatic valve are opened respectively, so that hydrogen can be stored in the high-pressure hydrogen storage tank, the medium-pressure hydrogen storage tank and the low-pressure hydrogen storage tank respectively. Then, hydrogen can be refueled for the hydrogen fuel cell vehicle in the low-pressure and medium-pressure stages like the existing hydrogen refueling stations, and hydrogen can be refueled for the hydrogen fuel cell vehicle in the high-pressure stage directly through the bypass pipeline and the hydrogen tube trailer. When the hydrogen tube trailer is a 50MPa tube trailer and its output pressure is greater than 30MPa and less than or equal to 35MPa, hydrogen can be stored in the high-pressure hydrogen storage tank by opening the third hydrogen unloading pneumatic valve, the fourth hydrogen unloading pneumatic valve, the fifth hydrogen storage pneumatic valve and the sixth hydrogen storage pneumatic valve, and starting the hydrogen compressor. Hydrogen can be stored in the low-pressure hydrogen storage tank through the bypass line and opening the seventh hydrogen unloading pneumatic valve, the first hydrogen storage pneumatic valve and the second hydrogen storage pneumatic valve. At this time, the output pressure of the hydrogen tube trailer can meet the pressure requirements of hydrogenation in the medium-pressure stage. The hydrogen fuel cell vehicle can be directly refueled in the medium-pressure stage through the bypass line and the hydrogen tube trailer. There is no need to store hydrogen in the medium-pressure hydrogen storage tank. The hydrogenation in the low-pressure stage and the high-pressure stage can be operated in the same sequence as the existing hydrogen refueling station. When the hydrogen tube trailer is a 50MPa tube trailer or a 30MPa tube trailer and its output pressure is greater than 25MPa and less than or equal to 30MPa, hydrogen can be stored in the high-pressure hydrogen storage tank by opening the third hydrogen unloading pneumatic valve, the fourth hydrogen unloading pneumatic valve, the fifth hydrogen storage pneumatic valve and the sixth hydrogen storage pneumatic valve, and starting the hydrogen compressor; hydrogen can be stored in the medium-pressure hydrogen storage tank by opening the third hydrogen unloading pneumatic valve, the fourth hydrogen unloading pneumatic valve, the third hydrogen storage pneumatic valve and the fourth hydrogen storage pneumatic valve, and starting the hydrogen compressor. Hydrogen can be stored in the low-pressure hydrogen storage tank by utilizing the bypass line and opening the fifth hydrogen unloading pneumatic valve, the first hydrogen storage pneumatic valve and the second hydrogen storage pneumatic valve. At this time, the output pressure of the hydrogen tube trailer can meet the pressure requirements of hydrogenation in the low-pressure stage. The hydrogen fuel cell vehicle can be directly refueled in the low-pressure stage through the bypass line and the hydrogen tube trailer. The hydrogenation in the medium-pressure stage and the high-pressure stage can be operated in the same sequence as the existing hydrogen refueling station.When the hydrogen tube trailer is a 50MPa tube trailer or a 30MPa tube trailer and its output pressure is greater than 20MPa and less than or equal to 25MPa, by opening the third hydrogen unloading pneumatic valve, the fourth hydrogen unloading pneumatic valve and the hydrogen storage pneumatic valves corresponding to the high-pressure hydrogen storage tank, the medium-pressure hydrogen storage tank and the low-pressure hydrogen storage tank, hydrogen can be stored in the high-pressure hydrogen storage tank, the medium-pressure hydrogen storage tank and the low-pressure hydrogen storage tank respectively, and hydrogenation of the hydrogen fuel cell vehicle can be carried out in the same sequence as the existing hydrogen refueling station. When the hydrogen tube trailer is a 50MPa tube trailer, a 30MPa tube trailer or a 20MPa tube trailer and its output pressure is greater than 7MPa and less than or equal to 20MPa, by opening the second hydrogen unloading pneumatic valve, the fourth hydrogen unloading pneumatic valve and the hydrogen storage pneumatic valves corresponding to the high-pressure hydrogen storage tank, the medium-pressure hydrogen storage tank and the low-pressure hydrogen storage tank, hydrogen can be stored in the high-pressure hydrogen storage tank, the medium-pressure hydrogen storage tank and the low-pressure hydrogen storage tank accordingly, just like the existing hydrogen refueling station, and the hydrogen fuel cell vehicle can be refueled in the same sequence as the existing hydrogen refueling station. Compared with existing hydrogen refueling stations, this invention does not require redesign or large-scale renovation. By enabling the integrated use of three types of long-tube trailers, it avoids the waste of high-value equipment renovation. By using 50MPa or 30MPa long-tube trailers for hydrogen long-tube trailers, the hydrogen unloading rate can be significantly improved. Compared with 20MPa long-tube trailers, the hydrogen unloading capacity of 50MPa long-tube trailers is increased by more than 230%, and the hydrogen unloading capacity of 30MPa long-tube trailers is increased by more than 75%, effectively reducing hydrogen supply costs. The control method of the multi-source hydrogen supply system provided by the present invention has the advantages of simple process flow, stability and reliability.

[0052] The following describes in detail a multi-source hydrogen supply system and control method based on a 45MPa compressor of the present invention in conjunction with the specific embodiments shown in the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 This is a structural schematic diagram of a multi-source hydrogen supply system based on a 45MPa compressor of the present invention. DETAILED DESCRIPTION

[0054] First of all, it should be noted that the directional words such as up, down, left, right, front and back mentioned in the present invention are only described according to the drawings for the convenience of understanding, and are not intended to limit the technical solution and scope of protection of the present invention.

[0055] like Figure 1The present invention shows a specific embodiment of a multi-source hydrogen supply system based on a 45MPa compressor, comprising a hydrogen tube trailer 1, a hydrogen compressor 2, a low-pressure hydrogen storage tank 3, a medium-pressure hydrogen storage tank 4, a high-pressure hydrogen storage tank 5, and a hydrogenator 6. The hydrogen compressor 2 is a 45MPa compressor. The inlet of the hydrogen compressor 2 is connected to the hydrogen tube trailer 1 via a hydrogen unloading pipeline. A manual master control valve 21, a first hydrogen unloading pneumatic valve 22, and a second hydrogen unloading pneumatic valve 23 are sequentially arranged on the hydrogen unloading pipeline from the hydrogen tube trailer 1 to the hydrogen compressor 2. The second hydrogen unloading pneumatic valve 23 is connected in parallel to the third hydrogen unloading pneumatic valve 24, and the third hydrogen unloading pneumatic valve 24 is connected in series with the first pressure regulating valve 25. A fourth hydrogen unloading pneumatic valve 26 is installed at the output port of the hydrogen compressor 2. The outlet of the fourth hydrogen unloading pneumatic valve 26 is connected to the hydrogen unloading pipeline between the first hydrogen unloading pneumatic valve 22 and the second hydrogen unloading pneumatic valve 23 via a bypass line. A fifth hydrogen unloading pneumatic valve 27, a sixth hydrogen unloading pneumatic valve 28, and a seventh hydrogen unloading pneumatic valve 29 are installed in parallel on the bypass line. The sixth hydrogen unloading pneumatic valve 28 is connected in series with a second pressure regulating valve 210, and the seventh hydrogen unloading pneumatic valve 29 is connected in series with a third pressure regulating valve 211. The low-pressure hydrogen storage tank 3 is connected to the outlet of the fourth hydrogen unloading pneumatic valve 26 via a low-pressure hydrogen storage pipeline, and a first hydrogen storage pneumatic valve 31 and a second hydrogen storage pneumatic valve 32 are installed on the low-pressure hydrogen storage pipeline. The medium-pressure hydrogen storage tank 4 is connected to the outlet of the fourth hydrogen unloading pneumatic valve 26 via a medium-pressure hydrogen storage pipeline, and a third hydrogen storage pneumatic valve 41 and a fourth hydrogen storage pneumatic valve 42 are installed on the medium-pressure hydrogen storage pipeline. The high-pressure hydrogen storage tank 5 is connected to the outlet of the fourth hydrogen unloading pneumatic valve 26 through a high-pressure hydrogen storage pipeline, and a fifth hydrogen storage pneumatic valve 51 and a sixth hydrogen storage pneumatic valve 52 are installed on the high-pressure hydrogen storage pipeline. The input port of the hydrogenator 6 is connected to the low-pressure hydrogen storage pipeline between the first hydrogen storage pneumatic valve 31 and the second hydrogen storage pneumatic valve 32 through a low-pressure hydrogenation pipeline, and a first hydrogenation pneumatic valve 61 is installed on the low-pressure hydrogenation pipeline. The input port of the hydrogenator 6 is connected to the medium-pressure hydrogen storage pipeline between the third hydrogen storage pneumatic valve 41 and the fourth hydrogen storage pneumatic valve 42 through a medium-pressure hydrogenation pipeline, and a second hydrogenation pneumatic valve 62 is installed on the medium-pressure hydrogenation pipeline. The input port of the hydrogenator 6 is connected to the high-pressure hydrogen storage pipeline between the fifth hydrogen storage pneumatic valve 51 and the sixth hydrogen storage pneumatic valve 52 through a high-pressure hydrogenation pipeline, and a third hydrogenation pneumatic valve 63 is installed on the high-pressure hydrogenation pipeline. The output port of the hydrogenator 6 is connected to the hydrogenation gun 64 through a hydrogenation hose. Among them, the first pressure regulating valve 25 is used to adjust the output pressure of the hydrogen tube trailer 1 to 20 MPa, the second pressure regulating valve 210 is used to adjust the output pressure of the hydrogen tube trailer 1 to 35 MPa, and the third pressure regulating valve 211 is used to adjust the output pressure of the hydrogen tube trailer 1 to 30 MPa.

[0056] The above configuration constitutes a multi-source hydrogen supply system based on a 45MPa compressor. In practical applications, the hydrogen supply system can select different operating modes according to the different output pressure ranges of the hydrogen tube trailer 1, thereby improving functionality and adaptability, and having the characteristics of simple structure and low cost. The present invention is based on the existing hydrogen refueling station and its 45MPa compressor. A second hydrogen unloading pneumatic valve 23 and a fourth hydrogen unloading pneumatic valve 26 are correspondingly arranged at the input and output ports of the hydrogen compressor 2, the second hydrogen unloading pneumatic valve 24 is connected in parallel to the third hydrogen unloading pneumatic valve 24, and the third hydrogen unloading pneumatic valve 24 is connected in series to the first pressure regulating valve 25. At the same time, the outlet of the fourth hydrogen unloading pneumatic valve 26 is connected to the hydrogen unloading pipeline in front of the second hydrogen unloading pneumatic valve 23 through a bypass line, and a fifth hydrogen unloading pneumatic valve 27, a sixth hydrogen unloading pneumatic valve 28 and a seventh hydrogen unloading pneumatic valve 29 are arranged in parallel on the bypass line, and the sixth hydrogen unloading pneumatic valve 28 is connected in series to the second pressure regulating valve 210, and the seventh hydrogen unloading pneumatic valve 29 is connected in series to the third pressure regulating valve 211, thereby realizing the multi-source comprehensive application of 20MPa long tube trailers, 30MPa long tube trailers and 50MPa long tube trailers. When the hydrogen tube trailer 1 is a 50MPa tube trailer and its output pressure is greater than 35MPa, the bypass line is used and the fifth hydrogen unloading pneumatic valve 27, the sixth hydrogen unloading pneumatic valve 28 and the seventh hydrogen unloading pneumatic valve 29 are opened respectively, so that hydrogen can be stored in the high-pressure hydrogen storage tank 5, the medium-pressure hydrogen storage tank 4 and the low-pressure hydrogen storage tank 3 respectively. Then, hydrogen can be refueled for the hydrogen fuel cell vehicle 100 in the low-pressure and medium-pressure stages like an existing hydrogen refueling station, and hydrogen can be refueled for the hydrogen fuel cell vehicle 100 in the high-pressure stage directly through the bypass line and the hydrogen tube trailer 1. When the hydrogen tube trailer 1 is a 50MPa tube trailer and its output pressure is greater than 30MPa and less than or equal to 35MPa, by opening the third hydrogen unloading pneumatic valve 24, the fourth hydrogen unloading pneumatic valve 26, the fifth hydrogen storage pneumatic valve 51 and the sixth hydrogen storage pneumatic valve 52, and starting the hydrogen compressor 2, hydrogen can be stored in the high-pressure hydrogen storage tank 5, and by opening the seventh hydrogen unloading pneumatic valve 29, the first hydrogen storage pneumatic valve 31 and the second hydrogen storage pneumatic valve 32 through the bypass line, hydrogen can be stored in the low-pressure hydrogen storage tank 3. At this time, the output pressure of the hydrogen tube trailer 1 can meet the pressure requirement of hydrogenation in the medium-pressure stage. The hydrogen fuel cell vehicle 100 can be directly hydrogenated in the medium-pressure stage through the bypass line and the hydrogen tube trailer 1. There is no need to store hydrogen in the medium-pressure hydrogen storage tank. The hydrogenation in the low-pressure stage and the high-pressure stage can be operated in the same sequence as the existing hydrogenation station.When the hydrogen tube trailer 1 is a 50MPa tube trailer or a 30MPa tube trailer and its output pressure is greater than 25MPa and less than or equal to 30MPa, by opening the third hydrogen unloading pneumatic valve 24, the fourth hydrogen unloading pneumatic valve 26, the fifth hydrogen storage pneumatic valve 51 and the sixth hydrogen storage pneumatic valve 52, and starting the hydrogen compressor 2, hydrogen can be stored in the high-pressure hydrogen storage tank 5; by opening the third hydrogen unloading pneumatic valve 24, the fourth hydrogen unloading pneumatic valve 26, the third hydrogen storage pneumatic valve 41 and the fourth hydrogen storage pneumatic valve 42, and starting the hydrogen compressor 2, hydrogen can be stored in the high-pressure hydrogen storage tank 5; By starting the hydrogen compressor 2, hydrogen can be stored in the medium-pressure hydrogen storage tank 4. By using the bypass pipeline and opening the fifth hydrogen unloading pneumatic valve 27, the first hydrogen storage pneumatic valve 31 and the second hydrogen storage pneumatic valve 32, hydrogen can be stored in the low-pressure hydrogen storage tank 3. At this time, the output pressure of the hydrogen long tube trailer 1 can meet the pressure requirement of hydrogenation in the low-pressure stage. The hydrogen fuel cell vehicle 100 can be directly hydrogenated in the low-pressure stage through the bypass pipeline and the hydrogen long tube trailer 1. The hydrogenation in the medium-pressure stage and the high-pressure stage can be operated in the same sequence as the existing hydrogenation station. When the hydrogen tube trailer 1 is a 50MPa tube trailer or a 30MPa tube trailer and its output pressure is greater than 20MPa and less than or equal to 25MPa, by opening the third hydrogen unloading pneumatic valve 24, the fourth hydrogen unloading pneumatic valve 26 and the hydrogen storage pneumatic valves corresponding to the high-pressure hydrogen storage tank 5, the medium-pressure hydrogen storage tank 4 and the low-pressure hydrogen storage tank 3, hydrogen can be stored in the high-pressure hydrogen storage tank 5, the medium-pressure hydrogen storage tank 4 and the low-pressure hydrogen storage tank 3 respectively, and hydrogenation of the hydrogen fuel cell vehicle 100 can be carried out in the same sequence as the existing hydrogen refueling station. When the hydrogen tube trailer 1 is a 50MPa tube trailer, a 30MPa tube trailer or a 20MPa tube trailer and its output pressure is greater than 7MPa and less than or equal to 20MPa, by opening the second hydrogen unloading pneumatic valve 22, the fourth hydrogen unloading pneumatic valve 26 and the hydrogen storage pneumatic valves corresponding to the high-pressure hydrogen storage tank 5, the medium-pressure hydrogen storage tank 4 and the low-pressure hydrogen storage tank 3, hydrogen can be stored in the high-pressure hydrogen storage tank 5, the medium-pressure hydrogen storage tank 4 and the low-pressure hydrogen storage tank 3, just like the existing hydrogen refueling station, and the hydrogen fuel cell vehicle 100 can be refueled in the same sequence as the existing hydrogen refueling station. Compared with existing hydrogen refueling stations, the present invention does not require redesign and large-scale transformation. On the basis of realizing the comprehensive application of three long tube trailers, it avoids the waste of transformation of high-value equipment. By making the hydrogen long tube trailer 1 adopt a 50MPa long tube trailer or a 30MPa long tube trailer, the hydrogen unloading rate can be greatly improved. Compared with the 20MPa long tube trailer, the hydrogen unloading capacity of the 50MPa long tube trailer is increased by more than 230%, and the hydrogen unloading capacity of the 30MPa long tube trailer is increased by more than 75%, which effectively reduces the hydrogen supply cost and improves economic benefits.It should be noted that in actual applications, in order to facilitate the detection of the output pressure of the hydrogen long tube trailer 1 and the pressures of the low-pressure hydrogen storage tank 3, the medium-pressure hydrogen storage tank 4 and the high-pressure hydrogen storage tank 5, the present invention is provided with a first pressure sensor 212 on the hydrogen unloading pipeline between the manual master control valve 21 and the first hydrogen unloading pneumatic valve 22, and a second pressure sensor 33, a third pressure sensor 43 and a fourth pressure sensor 53 are correspondingly provided on the low-pressure hydrogen storage tank 3, the medium-pressure hydrogen storage tank 4 and the high-pressure hydrogen storage tank 5.

[0057] Based on the same concept, the present invention also provides a control method for the above-mentioned multi-source hydrogen supply system, specifically, in the initial state, except for the manual master control valve 21 and the first hydrogen unloading pneumatic valve 22, which are in the open state, all other valves are in the closed state. When the output pressure of the hydrogen tube trailer 1 is greater than 35 MPa and less than or equal to 50 MPa, the system operates in pressure regulation mode 1; when the output pressure of the hydrogen tube trailer 1 is greater than 30 MPa and less than or equal to 35 MPa, the system operates in pressure regulation mode 2; when the output pressure of the hydrogen tube trailer 1 is greater than 25 MPa and less than or equal to 30 MPa, the system operates in pressure regulation mode 3; when the output pressure of the hydrogen tube trailer 1 is greater than 20 MPa and less than or equal to 25 MPa, the system operates in pressure regulation mode 4; when the output pressure of the hydrogen tube trailer 1 is greater than 7 MPa and less than or equal to 20 MPa, the system operates in normal mode. By enabling the system to select different operating modes according to different output pressure ranges of the hydrogen tube trailer 1, functionality and adaptability are improved, and the system is applicable to 20MPa tube trailers, 30MPa tube trailers, and 50MPa tube trailers.

[0058] Voltage regulation mode 1 specifically includes the following steps:

[0059] S1-1. When the pressure of the high-pressure hydrogen storage tank 5 is lower than 35 MPa, open the fifth hydrogen unloading pneumatic valve 27, the fifth hydrogen storage pneumatic valve 51, and the sixth hydrogen storage pneumatic valve 52 until the pressure of the high-pressure hydrogen storage tank 5 rises to 45 MPa or equals the output pressure of the hydrogen tube trailer 1. This step stores or replenishes hydrogen in the high-pressure hydrogen storage tank 5, maintaining the pressure of the high-pressure hydrogen storage tank 5 above 35 MPa without starting the hydrogen compressor 2.

[0060] S1-2: When the pressure of the medium-pressure hydrogen storage tank 4 falls below 30 MPa, open the sixth hydrogen unloading pneumatic valve 28, the third hydrogen storage pneumatic valve 41, and the fourth hydrogen storage pneumatic valve 42 until the pressure of the medium-pressure hydrogen storage tank 4 rises to 35 MPa. This step allows hydrogen to be stored or replenished in the medium-pressure hydrogen storage tank 4, maintaining the pressure of the medium-pressure hydrogen storage tank 4 within the range of 30 MPa to 35 MPa without starting the hydrogen compressor 2.

[0061] S1-3. When the pressure of low-pressure hydrogen storage tank 3 falls below 25 MPa, open seventh hydrogen unloading pneumatic valve 29, first hydrogen storage pneumatic valve 31, and second hydrogen storage pneumatic valve 32 until the pressure of low-pressure hydrogen storage tank 3 reaches 30 MPa. This step allows hydrogen to be stored or replenished in low-pressure hydrogen storage tank 3, maintaining the pressure of low-pressure hydrogen storage tank 3 within the range of 25 MPa to 30 MPa without starting hydrogen compressor 2.

[0062] The above steps describe the hydrogen unloading, storage, and replenishment process for pressure regulation mode 1. Storage refers to the initial charging of hydrogen into the high-pressure hydrogen storage tank 5, the medium-pressure hydrogen storage tank 4, and the low-pressure hydrogen storage tank 3. In actual applications, to improve storage efficiency, the present invention generally stores hydrogen in descending pressure order, i.e., first storing hydrogen in the high-pressure hydrogen storage tank 5, then in the medium-pressure hydrogen storage tank 4, and finally in the low-pressure hydrogen storage tank 3.

[0063] The pressure regulation mode 1 also includes a hydrogen filling process, that is, a hydrogen filling process of the hydrogen fuel cell vehicle 100, which specifically includes the following steps:

[0064] S1-4: When the pressure of the onboard hydrogen storage tank is lower than 20 MPa, connect the hydrogen refueling gun 64 to the hydrogen fuel cell vehicle 100 and open the first hydrogen refueling pneumatic valve 61 and the second hydrogen storage pneumatic valve 32. This step allows the low-pressure hydrogen storage tank 3 to be used to refuel the hydrogen fuel cell vehicle 100 at low pressure.

[0065] S1-5. When the pressure of the onboard hydrogen storage tank reaches 25 MPa, close the first hydrogenation pneumatic valve 61 and the second hydrogenation pneumatic valve 32, and open the second hydrogenation pneumatic valve 62 and the fourth hydrogenation pneumatic valve 42. After the low-pressure hydrogenation is complete, this step allows the medium-pressure hydrogen storage tank 4 to be used to refuel the hydrogen fuel cell vehicle 100 at the medium pressure stage.

[0066] S1-6. When the pressure of the onboard hydrogen storage tank reaches 30 MPa, close the second hydrogenation pneumatic valve 62 and the fourth hydrogen storage pneumatic valve 42, and open the third hydrogenation pneumatic valve 63, the fifth hydrogen storage pneumatic valve 51, and the fifth hydrogen discharge pneumatic valve 27. After the medium-pressure hydrogenation is complete, this step allows the hydrogen fuel cell vehicle 100 to be directly refueled with hydrogen at high pressure using the hydrogen tube trailer 1, without the need to repeatedly repressurize the high-pressure hydrogen storage tank 5.

[0067] S1-7. When the pressure of the onboard hydrogen storage tank reaches 35 MPa, close the third hydrogenation pneumatic valve 63, the fifth hydrogenation pneumatic valve 51, and the fifth hydrogenation pneumatic valve 27, and disconnect the hydrogenation gun 64 from the hydrogen fuel cell vehicle 100. After the high-pressure hydrogenation is complete, disconnect the hydrogenation gun 64 from the hydrogen fuel cell vehicle 100.

[0068] The on-board hydrogen storage tank herein refers to the hydrogen storage tank on the hydrogen fuel cell vehicle 100 , and connecting the hydrogen refueling gun 64 to the hydrogen fuel cell vehicle 100 refers to connecting the hydrogen refueling gun 64 to the on-board hydrogen storage tank.

[0069] Voltage regulation mode 2 specifically includes the following steps:

[0070] S2-1: When the pressure of the high-pressure hydrogen storage tank 5 falls below 40 MPa, open the third hydrogen unloading pneumatic valve 24, the fourth hydrogen unloading pneumatic valve 26, the fifth hydrogen storage pneumatic valve 51, and the sixth hydrogen storage pneumatic valve 52, and start the hydrogen compressor 2 until the pressure of the high-pressure hydrogen storage tank 5 reaches 45 MPa. This step replenishes the high-pressure hydrogen storage tank 5 with gas, maintaining the pressure of the high-pressure hydrogen storage tank 5 within the range of 40 MPa to 45 MPa.

[0071] S2-2: When the pressure of low-pressure hydrogen storage tank 3 falls below 25 MPa, open the seventh hydrogen unloading pneumatic valve 29, the first hydrogen storage pneumatic valve 31, and the second hydrogen storage pneumatic valve 32 until the pressure of low-pressure hydrogen storage tank 3 reaches 30 MPa. This step replenishes the low-pressure hydrogen storage tank 3 with gas, maintaining the pressure within the range of 25 MPa to 30 MPa.

[0072] The above steps are the hydrogen unloading and replenishing process of the pressure regulation mode 2. The pressure regulation mode 2 also includes a hydrogen filling process, that is, the process of hydrogenating the hydrogen fuel cell vehicle 100, which specifically includes the following steps:

[0073] S2-3: When the pressure of the onboard hydrogen storage tank is lower than 20 MPa, connect the hydrogen refueling gun 64 to the hydrogen fuel cell vehicle 100 and open the first hydrogen refueling pneumatic valve 61 and the second hydrogen storage pneumatic valve 32. This step allows the low-pressure hydrogen storage tank 3 to be used to refuel the hydrogen fuel cell vehicle 100 at low pressure.

[0074] S2-4. When the pressure of the onboard hydrogen storage tank reaches 25 MPa, close the first hydrogenation pneumatic valve 61 and the second hydrogenation pneumatic valve 32, and open the second hydrogenation pneumatic valve 62, the third hydrogenation pneumatic valve 41, and the fifth hydrogenation pneumatic valve 27. After the low-pressure hydrogenation is completed, this step allows the hydrogen fuel cell vehicle 100 to be directly refueled at the medium-pressure stage using the hydrogen tube trailer 1, without the need to repeatedly repressurize the medium-pressure hydrogen storage tank 4.

[0075] S2-5: When the pressure of the onboard hydrogen storage tank reaches 30 MPa, close the second hydrogenation pneumatic valve 62, the third hydrogenation pneumatic valve 41, and the fifth hydrogenation pneumatic valve 27, and open the third hydrogenation pneumatic valve 63 and the sixth hydrogenation pneumatic valve 52. After the medium-pressure hydrogenation is complete, this step allows the high-pressure hydrogenation of the hydrogen fuel cell vehicle 100 to proceed to the high-pressure stage using the high-pressure hydrogen storage tank 5.

[0076] S2-6: When the pressure of the onboard hydrogen storage tank reaches 35 MPa, close the third hydrogenation pneumatic valve 63 and the sixth hydrogen storage pneumatic valve 52, and disconnect the hydrogenation gun 64 from the hydrogen fuel cell vehicle 100. After the high-pressure hydrogenation is completed, disconnect the hydrogenation gun 64 from the hydrogen fuel cell vehicle 100.

[0077] Voltage regulation mode three specifically includes the following steps:

[0078] S3-1: When the pressure of high-pressure hydrogen storage tank 5 falls below 40 MPa, open third hydrogen unloading pneumatic valve 24, fourth hydrogen unloading pneumatic valve 26, fifth hydrogen storage pneumatic valve 51, and sixth hydrogen storage pneumatic valve 52, and start hydrogen compressor 2 until the pressure of high-pressure hydrogen storage tank 5 reaches 45 MPa. This step allows hydrogen to be stored or replenished in high-pressure hydrogen storage tank 5, maintaining the pressure of high-pressure hydrogen storage tank 5 within the range of 40 MPa to 45 MPa.

[0079] S3-2: When the pressure of the medium-pressure hydrogen storage tank 4 falls below 30 MPa, open the third hydrogen unloading pneumatic valve 24, the fourth hydrogen unloading pneumatic valve 26, the third hydrogen storage pneumatic valve 41, and the fourth hydrogen storage pneumatic valve 42, and start the hydrogen compressor 2 until the pressure of the medium-pressure hydrogen storage tank 4 reaches 35 MPa. This step stores or replenishes hydrogen in the medium-pressure hydrogen storage tank 4, maintaining the pressure of the medium-pressure hydrogen storage tank 4 within the range of 30 MPa to 35 MPa.

[0080] S3-3. When the pressure of the low-pressure hydrogen storage tank 3 falls below 25 MPa, open the fifth hydrogen unloading pneumatic valve 27, the first hydrogen storage pneumatic valve 31, and the second hydrogen storage pneumatic valve 32 until the pressure of the low-pressure hydrogen storage tank 3 rises to 30 MPa or equals the output pressure of the hydrogen tube trailer 1. This step allows hydrogen to be stored or replenished in the low-pressure hydrogen storage tank 3, maintaining the pressure of the low-pressure hydrogen storage tank 3 above 25 MPa.

[0081] The above steps are the hydrogen unloading, storage and replenishment process of pressure regulation mode 3. Pressure regulation mode 3 also includes a hydrogen filling process, that is, the process of hydrogenating the hydrogen fuel cell vehicle 100, which specifically includes the following steps:

[0082] S3-4: When the pressure of the onboard hydrogen storage tank is lower than 20 MPa, connect the hydrogen refueling gun 64 to the hydrogen fuel cell vehicle 100 and open the first hydrogen refueling pneumatic valve 61, the first hydrogen storage pneumatic valve 31, and the fifth hydrogen unloading pneumatic valve 27. This step allows the hydrogen tube trailer 1 to directly refuel the hydrogen fuel cell vehicle 100 at a low pressure.

[0083] S3-5: When the pressure of the onboard hydrogen storage tank reaches 25 MPa, close the first hydrogenation pneumatic valve 61, the first hydrogenation pneumatic valve 31, and the fifth hydrogenation pneumatic valve 27, and open the second hydrogenation pneumatic valve 62 and the fourth hydrogenation pneumatic valve 42. After the low-pressure hydrogenation is complete, this step allows the medium-pressure hydrogenation of the hydrogen fuel cell vehicle 100 to proceed to the medium-pressure hydrogenation using the medium-pressure hydrogen storage tank 4.

[0084] S3-6: When the pressure of the onboard hydrogen storage tank reaches 30 MPa, close the second hydrogenation pneumatic valve 62 and the fourth hydrogenation pneumatic valve 42, and open the third hydrogenation pneumatic valve 63 and the sixth hydrogenation pneumatic valve 52. After the medium-pressure hydrogenation is complete, this step allows the high-pressure hydrogenation of the hydrogen fuel cell vehicle 100 to proceed to the high-pressure hydrogenation using the high-pressure hydrogen storage tank 5.

[0085] S3-7: When the pressure of the onboard hydrogen storage tank reaches 35 MPa, close the third hydrogenation pneumatic valve 63 and the sixth hydrogen storage pneumatic valve 52, and disconnect the hydrogenation gun 64 from the hydrogen fuel cell vehicle 100. After the high-pressure hydrogenation is completed, disconnect the hydrogenation gun 64 from the hydrogen fuel cell vehicle 100.

[0086] Voltage regulation mode 4 specifically includes the following steps:

[0087] S4-1, open the third hydrogen unloading pneumatic valve 24 and the fourth hydrogen unloading pneumatic valve 26.

[0088] S4-2: When the pressure of the high-pressure hydrogen storage tank 5 falls below 40 MPa, the fifth and sixth hydrogen storage pneumatic valves 51 and 52 are opened, and the hydrogen compressor 2 is started until the pressure of the high-pressure hydrogen storage tank 5 reaches 45 MPa. This step replenishes the high-pressure hydrogen storage tank 5 with gas, maintaining the pressure of the high-pressure hydrogen storage tank 5 within the range of 40 MPa to 45 MPa.

[0089] S4-3: When the pressure of the intermediate-pressure hydrogen storage tank 4 falls below 30 MPa, the third and fourth hydrogen storage pneumatic valves 41, 42 are opened, and the hydrogen compressor 2 is started until the pressure of the intermediate-pressure hydrogen storage tank 4 reaches 35 MPa. This step replenishes the intermediate-pressure hydrogen storage tank 4 with gas, maintaining the pressure within the range of 30 MPa to 35 MPa.

[0090] S4-4: When the pressure of low-pressure hydrogen storage tank 3 falls below 25 MPa, open first hydrogen storage pneumatic valve 31 and second hydrogen storage pneumatic valve 32, and start hydrogen compressor 2 until the pressure of low-pressure hydrogen storage tank 3 reaches 30 MPa. This step replenishes hydrogen into low-pressure hydrogen storage tank 3, maintaining the pressure of low-pressure hydrogen storage tank 3 within the range of 25 MPa to 30 MPa.

[0091] The above steps are the hydrogen unloading and replenishing process of the pressure regulation mode 4. The pressure regulation mode 4 also includes a hydrogen filling process, that is, the process of hydrogenating the hydrogen fuel cell vehicle 100, which specifically includes the following steps:

[0092] S4-5: When the pressure of the onboard hydrogen storage tank is lower than 20 MPa, connect the hydrogen refueling gun 64 to the hydrogen fuel cell vehicle 100 and open the first hydrogen refueling pneumatic valve 61 and the second hydrogen storage pneumatic valve 32. This step allows the low-pressure hydrogen storage tank 3 to be used to refuel the hydrogen fuel cell vehicle 100 at low pressure.

[0093] S4-6: When the pressure of the onboard hydrogen storage tank reaches 25 MPa, close the first hydrogenation pneumatic valve 61 and the second hydrogenation pneumatic valve 32, and open the second hydrogenation pneumatic valve 62 and the fourth hydrogenation pneumatic valve 42. After the low-pressure hydrogenation is completed, this step allows the medium-pressure hydrogen storage tank 4 to be used to refuel the hydrogen fuel cell vehicle 100 at the medium pressure stage.

[0094] S4-7: When the pressure of the onboard hydrogen storage tank reaches 30 MPa, close the second hydrogenation pneumatic valve 62 and the fourth hydrogenation pneumatic valve 42, and open the third hydrogenation pneumatic valve 63 and the sixth hydrogenation pneumatic valve 52. After the medium-pressure hydrogenation is complete, this step allows the high-pressure hydrogenation of the hydrogen fuel cell vehicle 100 to proceed to the high-pressure hydrogenation using the high-pressure hydrogen storage tank 5.

[0095] S4-8: When the pressure of the onboard hydrogen storage tank reaches 35 MPa, close the third hydrogenation pneumatic valve 63 and the sixth hydrogen storage pneumatic valve 52, and disconnect the hydrogenation gun 64 from the hydrogen fuel cell vehicle 100. After the high-pressure hydrogenation is completed, disconnect the hydrogenation gun 64 from the hydrogen fuel cell vehicle 100.

[0096] The normal mode specifically includes the following steps:

[0097] S5-1, open the second hydrogen unloading pneumatic valve 23 and the fourth hydrogen unloading pneumatic valve 26.

[0098] S5-2: When the pressure of the high-pressure hydrogen storage tank 5 falls below 40 MPa, the fifth and sixth hydrogen storage pneumatic valves 51 and 52 are opened, and the hydrogen compressor 2 is started until the pressure of the high-pressure hydrogen storage tank 5 reaches 45 MPa. This step stores or replenishes hydrogen in the high-pressure hydrogen storage tank 5, maintaining the pressure of the high-pressure hydrogen storage tank 5 within the range of 40 MPa to 45 MPa.

[0099] S5-3: When the pressure of the medium-pressure hydrogen storage tank 4 falls below 30 MPa, the third and fourth hydrogen storage pneumatic valves 41, 42 are opened, and the hydrogen compressor 2 is started until the pressure of the medium-pressure hydrogen storage tank 4 reaches 35 MPa. This step stores or replenishes hydrogen in the medium-pressure hydrogen storage tank 4, maintaining the pressure of the medium-pressure hydrogen storage tank 4 within the range of 30 MPa to 35 MPa.

[0100] S5-4: When the pressure of low-pressure hydrogen storage tank 3 falls below 25 MPa, open first hydrogen storage pneumatic valve 31 and second hydrogen storage pneumatic valve 32, and start hydrogen compressor 2 until the pressure of low-pressure hydrogen storage tank 3 reaches 30 MPa. This step stores or replenishes hydrogen in low-pressure hydrogen storage tank 3, maintaining the pressure of low-pressure hydrogen storage tank 3 within the range of 25 MPa to 30 MPa.

[0101] The above steps are the hydrogen unloading, storage and replenishment process of the conventional mode. The conventional mode also includes a hydrogen filling process, that is, the process of hydrogenating the hydrogen fuel cell vehicle 100, which specifically includes the following steps:

[0102] S5-5: When the pressure of the onboard hydrogen storage tank is lower than 20 MPa, connect the hydrogen refueling gun 64 to the hydrogen fuel cell vehicle 100 and open the first hydrogen refueling pneumatic valve 61 and the second hydrogen storage pneumatic valve 32. This step allows the low-pressure hydrogen storage tank 3 to be used to refuel the hydrogen fuel cell vehicle 100 at low pressure.

[0103] S5-6: When the pressure of the onboard hydrogen storage tank reaches 25 MPa, close the first hydrogenation pneumatic valve 61 and the second hydrogenation pneumatic valve 32, and open the second hydrogenation pneumatic valve 62 and the fourth hydrogenation pneumatic valve 42. After the low-pressure hydrogenation is completed, this step allows the medium-pressure hydrogen storage tank 4 to be used to hydrogenate the hydrogen fuel cell vehicle 100 at the medium-pressure stage.

[0104] S5-7: When the pressure of the onboard hydrogen storage tank reaches 30 MPa, close the second hydrogenation pneumatic valve 62 and the fourth hydrogenation pneumatic valve 42, and open the third hydrogenation pneumatic valve 63 and the sixth hydrogenation pneumatic valve 52. After the medium-pressure hydrogenation is complete, this step allows the high-pressure hydrogenation of the hydrogen fuel cell vehicle 100 to proceed to the high-pressure hydrogenation using the high-pressure hydrogen storage tank 5.

[0105] S5-8: When the pressure of the onboard hydrogen storage tank reaches 35 MPa, close the third hydrogenation pneumatic valve 63 and the sixth hydrogen storage pneumatic valve 52, and disconnect the hydrogenation gun 64 from the hydrogen fuel cell vehicle 100. After the high-pressure hydrogenation is completed, disconnect the hydrogenation gun 64 from the hydrogen fuel cell vehicle 100.

[0106] It should be noted that, under normal circumstances, hydrogen is only filled when the pressure of the on-board hydrogen storage tank is lower than 20MPa. If hydrogen is filled when the pressure of the on-board hydrogen storage tank is between 20MPa and 25MPa, the hydrogen filling process of pressure regulation mode 1, pressure regulation mode 2, pressure regulation mode 3, pressure regulation mode 4 and conventional mode is the same as when the pressure of the on-board hydrogen storage tank is lower than 20MPa. If hydrogen is filled when the pressure of the on-board hydrogen storage tank is between 25MPa and 30MPa, the hydrogen filling process of pressure regulation mode 1, pressure regulation mode 2, pressure regulation mode 3, pressure regulation mode 4 and conventional mode should skip the hydrogen filling process in the low-pressure stage. If hydrogen is filled when the pressure of the on-board hydrogen storage tank is between 30MPa and 35MPa, the hydrogen filling process of pressure regulation mode 1, pressure regulation mode 2, pressure regulation mode 3, pressure regulation mode 4 and conventional mode should skip the hydrogen filling process in the low-pressure stage and the medium-pressure stage. It should also be pointed out that the pressure of the on-board hydrogen storage tank is detected by the hydrogenator 6 after connecting the hydrogenation gun 64. The hydrogenator 6 and its hydrogenation gun 64 are existing equipment in the field, and their structure, principle and connection relationship are well known to technicians.

[0107] The above embodiments are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of protection claimed for the present invention. Without departing from the design concept of the present invention, various modifications made by those skilled in the art based on the technical solution of the present invention should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A multi-source hydrogen supply system based on a 45MPa compressor, characterized in that: The invention comprises a hydrogen tube trailer (1), a hydrogen compressor (2), a low-pressure hydrogen storage tank (3), a medium-pressure hydrogen storage tank (4), a high-pressure hydrogen storage tank (5) and a hydrogenator (6), wherein the hydrogen compressor (2) is a 45MPa compressor, the input port of the hydrogen compressor (2) is connected to the hydrogen tube trailer (1) through a hydrogen unloading pipeline, and the direction from the hydrogen tube trailer (1) to the hydrogen compressor (2) on the hydrogen unloading pipeline is sequentially provided with a manual master control valve (21), a first hydrogen unloading pneumatic valve (22) and a second hydrogen unloading pneumatic valve (23), the second hydrogen unloading pneumatic valve (23) is connected in parallel with a third hydrogen unloading pneumatic valve (24), and the third hydrogen unloading pneumatic valve (24) is connected in series with a first regulating valve (21). A pressure regulating valve (25) is provided at the output port of the hydrogen compressor (2), and a fourth hydrogen unloading pneumatic valve (26) is provided. The outlet of the fourth hydrogen unloading pneumatic valve (26) is connected to the hydrogen unloading pipeline between the first hydrogen unloading pneumatic valve (22) and the second hydrogen unloading pneumatic valve (23) through a bypass pipeline. A fifth hydrogen unloading pneumatic valve (27), a sixth hydrogen unloading pneumatic valve (28) and a seventh hydrogen unloading pneumatic valve (29) are provided on the bypass pipeline in parallel with each other. The sixth hydrogen unloading pneumatic valve (28) is connected in series with a second pressure regulating valve (210), and the seventh hydrogen unloading pneumatic valve (29) is connected in series with a third pressure regulating valve (211). The low-pressure hydrogen storage tank (3) is connected to the fourth hydrogen unloading pneumatic valve (26) through the low-pressure hydrogen storage pipeline. The outlet of the hydrogen storage tank (5) is connected to the outlet of the fourth hydrogen unloading pneumatic valve (26), the low-pressure hydrogen storage pipeline is provided with a first hydrogen storage pneumatic valve (31) and a second hydrogen storage pneumatic valve (32), the medium-pressure hydrogen storage tank (4) is connected to the outlet of the fourth hydrogen unloading pneumatic valve (26) through the medium-pressure hydrogen storage pipeline, the medium-pressure hydrogen storage pipeline is provided with a third hydrogen storage pneumatic valve (41) and a fourth hydrogen storage pneumatic valve (42), the high-pressure hydrogen storage tank (5) is connected to the outlet of the fourth hydrogen unloading pneumatic valve (26) through the high-pressure hydrogen storage pipeline, the high-pressure hydrogen storage pipeline is provided with a fifth hydrogen storage pneumatic valve (51) and a sixth hydrogen storage pneumatic valve (52), the input port of the hydrogenator (6) is connected to the first hydrogen storage pneumatic valve (31) and the second hydrogen storage pneumatic valve (32) through the low-pressure hydrogenation pipeline. The low-pressure hydrogen storage pipeline between the valves (32) is connected, a first hydrogenation pneumatic valve (61) is provided on the low-pressure hydrogenation pipeline, an input port of the hydrogenator (6) is connected to the medium-pressure hydrogen storage pipeline between the third hydrogen storage pneumatic valve (41) and the fourth hydrogen storage pneumatic valve (42) through the medium-pressure hydrogenation pipeline, a second hydrogenation pneumatic valve (62) is provided on the medium-pressure hydrogenation pipeline, an input port of the hydrogenator (6) is connected to the high-pressure hydrogen storage pipeline between the fifth hydrogen storage pneumatic valve (51) and the sixth hydrogen storage pneumatic valve (52) through the high-pressure hydrogenation pipeline, a third hydrogenation pneumatic valve (63) is provided on the high-pressure hydrogenation pipeline, and an output port of the hydrogenator (6) is connected to a hydrogenation gun (64) through a hydrogenation hose.

2. The multi-source hydrogen supply system based on a 45MPa compressor according to claim 1, characterized in that: A first pressure sensor (212) is provided on the hydrogen unloading pipeline between the manual master control valve (21) and the first hydrogen unloading pneumatic valve (22); a second pressure sensor (33), a third pressure sensor (43) and a fourth pressure sensor (53) are provided on the low-pressure hydrogen storage tank (3), the medium-pressure hydrogen storage tank (4) and the high-pressure hydrogen storage tank (5) respectively; the first pressure regulating valve (25) is used to adjust the output pressure of the hydrogen tube trailer (1) to 20 MPa, the second pressure regulating valve (210) is used to adjust the output pressure of the hydrogen tube trailer (1) to 35 MPa, and the third pressure regulating valve (211) is used to adjust the output pressure of the hydrogen tube trailer (1) to 30 MPa.

3. A control method for the multi-source hydrogen supply system according to claim 2, characterized in that: In the initial state, except for the manual master control valve (21) and the first hydrogen unloading pneumatic valve (22) which are in the open state, all other valves are in the closed state. When the output pressure of the hydrogen tube trailer (1) is greater than 35 MPa and less than or equal to 50 MPa, the system is operated in pressure regulation mode 1; when the output pressure of the hydrogen tube trailer (1) is greater than 30 MPa and less than or equal to 35 MPa, the system is operated in pressure regulation mode 2; when the output pressure of the hydrogen tube trailer (1) is greater than 25 MPa and less than or equal to 30 MPa, the system is operated in pressure regulation mode 3; when the output pressure of the hydrogen tube trailer (1) is greater than 20 MPa and less than or equal to 25 MPa, the system is operated in pressure regulation mode 4; when the output pressure of the hydrogen tube trailer (1) is greater than 7 MPa and less than or equal to 20 MPa, the system is operated in normal mode.

4. The control method of the multi-source hydrogen supply system according to claim 3, characterized in that: The voltage regulation mode 1 includes the following steps: S1-1. When the pressure of the high-pressure hydrogen storage tank (5) is lower than 35 MPa, the fifth hydrogen unloading pneumatic valve (27), the fifth hydrogen storage pneumatic valve (51) and the sixth hydrogen storage pneumatic valve (52) are opened until the pressure of the high-pressure hydrogen storage tank (5) rises to 45 MPa or equals the output pressure of the hydrogen tube trailer (1); S1-2, when the pressure of the medium-pressure hydrogen storage tank (4) is lower than 30 MPa, the sixth hydrogen unloading pneumatic valve (28), the third hydrogen storage pneumatic valve (41) and the fourth hydrogen storage pneumatic valve (42) are opened until the pressure of the medium-pressure hydrogen storage tank (4) rises to 35 MPa; S1-3. When the pressure of the low-pressure hydrogen storage tank (3) is lower than 25 MPa, the seventh hydrogen unloading pneumatic valve (29), the first hydrogen storage pneumatic valve (31) and the second hydrogen storage pneumatic valve (32) are opened until the pressure of the low-pressure hydrogen storage tank (3) rises to 30 MPa.

5. The control method of the multi-source hydrogen supply system according to claim 4, characterized in that: The voltage regulation mode 1 further includes the following steps: S1-4, when the pressure of the onboard hydrogen storage tank is lower than 20 MPa, the hydrogenation gun (64) is connected to the hydrogen fuel cell vehicle (100), and the first hydrogenation pneumatic valve (61) and the second hydrogen storage pneumatic valve (32) are opened; S1-5. When the pressure of the onboard hydrogen storage tank rises to 25 MPa, the first hydrogenation pneumatic valve (61) and the second hydrogenation pneumatic valve (32) are closed, and the second hydrogenation pneumatic valve (62) and the fourth hydrogenation pneumatic valve (42) are opened; S1-6. When the pressure of the onboard hydrogen storage tank rises to 30 MPa, close the second hydrogenation pneumatic valve (62) and the fourth hydrogen storage pneumatic valve (42), and open the third hydrogenation pneumatic valve (63), the fifth hydrogen storage pneumatic valve (51), and the fifth hydrogen unloading pneumatic valve (27); S1-7, when the pressure of the onboard hydrogen storage tank rises to 35 MPa, close the third hydrogenation pneumatic valve (63), the fifth hydrogen storage pneumatic valve (51) and the fifth hydrogen discharge pneumatic valve (27), and disconnect the hydrogenation gun (64) from the hydrogen fuel cell vehicle (100); The on-board hydrogen storage tank refers to a hydrogen storage tank on the hydrogen fuel cell vehicle (100), and connecting the hydrogen refueling gun (64) to the hydrogen fuel cell vehicle (100) refers to connecting the hydrogen refueling gun (64) to the on-board hydrogen storage tank.

6. The control method of the multi-source hydrogen supply system according to claim 3, characterized in that: The voltage regulation mode 2 includes the following steps: S2-1. When the pressure of the high-pressure hydrogen storage tank (5) is lower than 40 MPa, the third hydrogen unloading pneumatic valve (24), the fourth hydrogen unloading pneumatic valve (26), the fifth hydrogen storage pneumatic valve (51) and the sixth hydrogen storage pneumatic valve (52) are opened, and the hydrogen compressor (2) is started until the pressure of the high-pressure hydrogen storage tank (5) rises to 45 MPa; S2-2. When the pressure of the low-pressure hydrogen storage tank (3) is lower than 25 MPa, the seventh hydrogen unloading pneumatic valve (29), the first hydrogen storage pneumatic valve (31) and the second hydrogen storage pneumatic valve (32) are opened until the pressure of the low-pressure hydrogen storage tank (3) rises to 30 MPa.

7. The control method of the multi-source hydrogen supply system according to claim 6, characterized in that: The voltage regulation mode 2 further includes the following steps: S2-3, when the pressure of the onboard hydrogen storage tank is lower than 20 MPa, connect the hydrogenation gun (64) to the hydrogen fuel cell vehicle (100), and open the first hydrogenation pneumatic valve (61) and the second hydrogen storage pneumatic valve (32); S2-4. When the pressure of the onboard hydrogen storage tank rises to 25 MPa, close the first hydrogenation pneumatic valve (61) and the second hydrogenation pneumatic valve (32), and open the second hydrogenation pneumatic valve (62), the third hydrogenation pneumatic valve (41) and the fifth hydrogenation pneumatic valve (27); S2-5. When the pressure of the onboard hydrogen storage tank rises to 30 MPa, close the second hydrogenation pneumatic valve (62), the third hydrogenation pneumatic valve (41) and the fifth hydrogenation pneumatic valve (27), and open the third hydrogenation pneumatic valve (63) and the sixth hydrogenation pneumatic valve (52); S2-6. When the pressure of the onboard hydrogen storage tank rises to 35 MPa, the third hydrogenation pneumatic valve (63) and the sixth hydrogen storage pneumatic valve (52) are closed, and the connection between the hydrogenation gun (64) and the hydrogen fuel cell vehicle (100) is released.

8. The control method of the multi-source hydrogen supply system according to claim 3, characterized in that: The voltage regulation mode three includes the following steps: S3-1. When the pressure of the high-pressure hydrogen storage tank (5) is lower than 40 MPa, the third hydrogen unloading pneumatic valve (24), the fourth hydrogen unloading pneumatic valve (26), the fifth hydrogen storage pneumatic valve (51) and the sixth hydrogen storage pneumatic valve (52) are opened, and the hydrogen compressor (2) is started until the pressure of the high-pressure hydrogen storage tank (5) rises to 45 MPa; S3-2, when the pressure of the medium-pressure hydrogen storage tank (4) is lower than 30 MPa, the third hydrogen unloading pneumatic valve (24), the fourth hydrogen unloading pneumatic valve (26), the third hydrogen storage pneumatic valve (41) and the fourth hydrogen storage pneumatic valve (42) are opened, and the hydrogen compressor (2) is started until the pressure of the medium-pressure hydrogen storage tank (4) rises to 35 MPa; S3-3. When the pressure of the low-pressure hydrogen storage tank (3) is lower than 25 MPa, the fifth hydrogen unloading pneumatic valve (27), the first hydrogen storage pneumatic valve (31) and the second hydrogen storage pneumatic valve (32) are opened until the pressure of the low-pressure hydrogen storage tank (3) rises to 30 MPa or equals the output pressure of the hydrogen tube trailer (1); S3-4, when the pressure of the onboard hydrogen storage tank is lower than 20 MPa, the hydrogenation gun (64) is connected to the hydrogen fuel cell vehicle (100), and the first hydrogenation pneumatic valve (61), the first hydrogen storage pneumatic valve (31) and the fifth hydrogen discharge pneumatic valve (27) are opened; S3-5. When the pressure of the onboard hydrogen storage tank rises to 25 MPa, close the first hydrogenation pneumatic valve (61), the first hydrogenation pneumatic valve (31) and the fifth hydrogenation pneumatic valve (27), and open the second hydrogenation pneumatic valve (62) and the fourth hydrogenation pneumatic valve (42); S3-6. When the pressure of the onboard hydrogen storage tank rises to 30 MPa, close the second hydrogenation pneumatic valve (62) and the fourth hydrogen storage pneumatic valve (42), and open the third hydrogenation pneumatic valve (63) and the sixth hydrogen storage pneumatic valve (52); S3-7. When the pressure of the onboard hydrogen storage tank rises to 35 MPa, the third hydrogenation pneumatic valve (63) and the sixth hydrogen storage pneumatic valve (52) are closed, and the connection between the hydrogenation gun (64) and the hydrogen fuel cell vehicle (100) is released.

9. The control method of the multi-source hydrogen supply system according to claim 3, characterized in that: The voltage regulation mode 4 includes the following steps: S4-1, opening the third hydrogen unloading pneumatic valve (24) and the fourth hydrogen unloading pneumatic valve (26); S4-2, when the pressure of the high-pressure hydrogen storage tank (5) is lower than 40 MPa, the fifth hydrogen storage pneumatic valve (51) and the sixth hydrogen storage pneumatic valve (52) are opened, and the hydrogen compressor (2) is started until the pressure of the high-pressure hydrogen storage tank (5) rises to 45 MPa; S4-3, when the pressure of the medium-pressure hydrogen storage tank (4) is lower than 30 MPa, the third hydrogen storage pneumatic valve (41) and the fourth hydrogen storage pneumatic valve (42) are opened, and the hydrogen compressor (2) is started until the pressure of the medium-pressure hydrogen storage tank (4) rises to 35 MPa; S4-4, when the pressure of the low-pressure hydrogen storage tank (3) is lower than 25 MPa, the first hydrogen storage pneumatic valve (31) and the second hydrogen storage pneumatic valve (32) are opened, and the hydrogen compressor (2) is started until the pressure of the low-pressure hydrogen storage tank (3) rises to 30 MPa; S4-5. When the pressure of the onboard hydrogen storage tank is lower than 20 MPa, the hydrogenation gun (64) is connected to the hydrogen fuel cell vehicle (100), and the first hydrogenation pneumatic valve (61) and the second hydrogen storage pneumatic valve (32) are opened; S4-6. When the pressure of the onboard hydrogen storage tank rises to 25 MPa, close the first hydrogenation pneumatic valve (61) and the second hydrogenation pneumatic valve (32), and open the second hydrogenation pneumatic valve (62) and the fourth hydrogenation pneumatic valve (42); S4-7. When the pressure of the onboard hydrogen storage tank rises to 30 MPa, close the second hydrogenation pneumatic valve (62) and the fourth hydrogen storage pneumatic valve (42), and open the third hydrogenation pneumatic valve (63) and the sixth hydrogen storage pneumatic valve (52); S4-8. When the pressure of the onboard hydrogen storage tank rises to 35 MPa, the third hydrogenation pneumatic valve (63) and the sixth hydrogen storage pneumatic valve (52) are closed, and the connection between the hydrogenation gun (64) and the hydrogen fuel cell vehicle (100) is released.

10. The control method of a multi-source hydrogen supply system according to claim 3, characterized in that: The conventional mode includes the following steps: S5-1, opening the second hydrogen unloading pneumatic valve (23) and the fourth hydrogen unloading pneumatic valve (26); S5-2, when the pressure of the high-pressure hydrogen storage tank (5) is lower than 40 MPa, the fifth hydrogen storage pneumatic valve (51) and the sixth hydrogen storage pneumatic valve (52) are opened, and the hydrogen compressor (2) is started until the pressure of the high-pressure hydrogen storage tank (5) rises to 45 MPa; S5-3, when the pressure of the medium-pressure hydrogen storage tank (4) is lower than 30 MPa, the third hydrogen storage pneumatic valve (41) and the fourth hydrogen storage pneumatic valve (42) are opened, and the hydrogen compressor (2) is started until the pressure of the medium-pressure hydrogen storage tank (4) rises to 35 MPa; S5-4. When the pressure of the low-pressure hydrogen storage tank (3) is lower than 25 MPa, the first hydrogen storage pneumatic valve (31) and the second hydrogen storage pneumatic valve (32) are opened, and the hydrogen compressor (2) is started until the pressure of the low-pressure hydrogen storage tank (3) rises to 30 MPa; S5-5, when the pressure of the onboard hydrogen storage tank is lower than 20 MPa, connect the hydrogenation gun (64) to the hydrogen fuel cell vehicle (100), and open the first hydrogenation pneumatic valve (61) and the second hydrogen storage pneumatic valve (32); S5-6. When the pressure of the onboard hydrogen storage tank rises to 25 MPa, close the first hydrogenation pneumatic valve (61) and the second hydrogenation pneumatic valve (32), and open the second hydrogenation pneumatic valve (62) and the fourth hydrogenation pneumatic valve (42); S5-7. When the pressure of the onboard hydrogen storage tank rises to 30 MPa, close the second hydrogenation pneumatic valve (62) and the fourth hydrogen storage pneumatic valve (42), and open the third hydrogenation pneumatic valve (63) and the sixth hydrogen storage pneumatic valve (52); S5-8. When the pressure of the onboard hydrogen storage tank rises to 35 MPa, the third hydrogenation pneumatic valve (63) and the sixth hydrogen storage pneumatic valve (52) are closed, and the connection between the hydrogenation gun (64) and the hydrogen fuel cell vehicle (100) is released.

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