Comprehensive hydrogen supply system based on 45MPa compressor and control method

Abstract

The invention relates to a comprehensive hydrogen supply system based on a 45MPa compressor and a control method.The hydrogen supply system comprises a hydrogen long pipe trailer, the 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, and the hydrogen compressor is connected with the hydrogen long pipe trailer through a hydrogen discharging pipeline; the hydrogen discharging pipeline is provided with a first hydrogen discharging pneumatic valve and a second hydrogen discharging pneumatic valve, the second hydrogen discharging pneumatic valve is connected with a third hydrogen discharging pneumatic valve in parallel, the third hydrogen discharging pneumatic valve is connected with a pressure regulating valve in series, and the hydrogen compressor is correspondingly connected with a low-pressure hydrogen storage tank, a medium-pressure hydrogen storage tank and a high-pressure hydrogen storage tank through a low-pressure hydrogen storage pipeline, a medium-pressure hydrogen storage pipeline and a high-pressure hydrogen storage pipeline. The hydrogenation machine is correspondingly connected with the low-pressure hydrogen storage pipeline, the medium-pressure hydrogen storage pipeline and the high-pressure hydrogen storage pipeline through the low-pressure hydrogenation pipeline, the medium-pressure hydrogenation pipeline and the high-pressure hydrogenation pipeline, the hydrogenation machine is connected with a hydrogenation gun through a hydrogenation hose, and the hydrogen storage system has the advantages of being simple in structure, high in functionality and good in adaptability; the control method has the advantages of being simple in process, stable and reliable.

Description

Technical Field

[0001] The present invention relates to a hydrogen refueling station, and in particular to a comprehensive 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 comprehensive 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-mentioned problems existing in the prior art, the present invention provides a comprehensive hydrogen supply system based on a 45MPa compressor, including a hydrogen long 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 long 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 long tube trailer to the hydrogen compressor, the second hydrogen unloading pneumatic valve is connected in parallel with a third hydrogen unloading pneumatic valve, and the third hydrogen unloading pneumatic valve is connected in series with a pressure regulating valve, the low-pressure hydrogen storage tank is connected to the output port of the hydrogen compressor through a low-pressure hydrogen storage pipeline, a first hydrogen storage pneumatic valve and a second hydrogen storage pneumatic valve are provided on the low-pressure hydrogen storage pipeline, the low-pressure hydrogen storage pipeline between the first hydrogen storage pneumatic valve and the second hydrogen storage 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, and a bypass pipeline is provided The fourth hydrogen unloading pneumatic valve, the medium-pressure hydrogen storage tank is connected to the output port of the hydrogen compressor through the medium-pressure hydrogen storage pipeline, and the medium-pressure hydrogen storage pipeline is provided with a third hydrogen storage pneumatic valve and a fourth hydrogen storage pneumatic valve, the high-pressure hydrogen storage tank is connected to the output port of the hydrogen compressor through the high-pressure hydrogen storage pipeline, and the high-pressure hydrogen storage pipeline is provided with a fifth hydrogen storage pneumatic valve and a sixth hydrogen storage pneumatic valve, the input port of the hydrogenator is connected to the low-pressure hydrogen storage pipeline between the first hydrogen storage pneumatic valve and the second hydrogen storage pneumatic valve through the low-pressure hydrogenation pipeline A first hydrogenation pneumatic valve is provided on the low-pressure hydrogenation pipeline, and 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 a medium-pressure hydrogenation pipeline. A second hydrogenation pneumatic valve is provided on the medium-pressure hydrogenation pipeline, and 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 a 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 a hydrogenation gun through a hydrogenation hose.

[0005] Furthermore, the present invention provides an integrated 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 pressure regulating valve is used to adjust the output pressure of the hydrogen long tube trailer to 20MPa.

[0006] Based on the same concept, the present invention also provides a control method for the above-mentioned integrated 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 25MPa and less than or equal to 30MPa, the hydrogen supply system operates in pressure regulation mode 1; when the output pressure of the hydrogen tube trailer is greater than 20MPa and less than or equal to 25MPa, the hydrogen supply system operates in pressure regulation mode 2; when the output pressure of the hydrogen tube trailer is greater than 7MPa and less than or equal to 20MPa, the hydrogen supply system operates in normal mode.

[0007] Furthermore, the present invention provides a control method for the above-mentioned integrated 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 40 MPa, open the third 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;

[0009] S1-2. When the pressure of the medium-pressure hydrogen storage tank is lower than 30 MPa, open the third 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;

[0010] S1-3. When the pressure of the low-pressure hydrogen storage tank is lower than 25 MPa, open the fourth hydrogen unloading 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 long tube trailer.

[0011] Furthermore, in the control method of the above-mentioned integrated hydrogen supply system of the present invention, the pressure regulation mode 1 further includes the following steps:

[0012] S1-4. When the pressure of the hydrogen storage tank on the hydrogen fuel cell vehicle 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 fourth hydrogen unloading 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 fourth hydrogenation pneumatic valve, and open the second hydrogenation pneumatic valve and the fourth hydrogenation 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 and the sixth hydrogen storage pneumatic valve;

[0015] S1-7. 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.

[0016] Furthermore, the present invention provides a control method for the above-mentioned integrated hydrogen supply system, wherein the second pressure regulation mode comprises the following steps:

[0017] S2-1, open the third hydrogen unloading pneumatic valve;

[0018] S2-2. 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;

[0019] S2-3. 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;

[0020] S2-4. 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.

[0021] Furthermore, in the control method of the above-mentioned integrated hydrogen supply system of the present invention, the second pressure regulation mode further includes the following steps:

[0022] S2-5. When the pressure of the hydrogen storage tank on the hydrogen fuel cell vehicle 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;

[0023] S2-6. 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;

[0024] S2-7. 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;

[0025] S2-8. 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.

[0026] Furthermore, the present invention provides a control method for the above-mentioned integrated hydrogen supply system, wherein the conventional mode comprises the following steps:

[0027] S3-1, open the second hydrogen unloading pneumatic valve;

[0028] S3-2. 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;

[0029] S3-3. When the pressure of the medium-pressure hydrogen storage tank is lower than 30 MPa, open the third and fourth hydrogen storage pneumatic valves, and start the hydrogen compressor until the pressure of the medium-pressure hydrogen storage tank rises to 35 MPa.

[0030] S3-4. 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.

[0031] Furthermore, the present invention provides a control method for the above-mentioned integrated hydrogen supply system, wherein the conventional mode further comprises the following steps:

[0032] S3-5. When the pressure of the hydrogen storage tank on the hydrogen fuel cell vehicle is lower than 20 MPa, connect the hydrogen refueling gun to the hydrogen fuel cell vehicle and open the first hydrogen refueling pneumatic valve and the second hydrogen storage pneumatic valve;

[0033] S3-6. 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;

[0034] S3-7. 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;

[0035] S3-8. 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.

[0036] Compared with the prior art, the present invention provides a comprehensive hydrogen supply system and control method based on a 45MPa compressor, which 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 unloading valve and a second unloading valve are sequentially provided on the hydrogen unloading pipeline from the hydrogen tube trailer to the hydrogen compressor. The hydrogen actuated valve and the second hydrogen unloading pneumatic valve are connected in parallel to the third hydrogen unloading pneumatic valve, and the third hydrogen unloading pneumatic valve is connected in series with the pressure regulating valve, so that the low-pressure hydrogen storage tank is connected to the output port of the hydrogen compressor through the low-pressure hydrogen storage pipeline, and the first hydrogen storage pneumatic valve and the second hydrogen storage pneumatic valve are set on the low-pressure hydrogen storage pipeline, and the low-pressure hydrogen storage pipeline between the first hydrogen storage pneumatic valve and the second hydrogen storage 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, and a bypass pipeline is set on the bypass pipeline. A fourth hydrogen unloading pneumatic valve is installed, and the medium-pressure hydrogen storage tank is connected to the output port of the hydrogen compressor through the medium-pressure hydrogen storage pipeline, and a third hydrogen storage pneumatic valve and a fourth hydrogen storage pneumatic valve are installed on the medium-pressure hydrogen storage pipeline, and the high-pressure hydrogen storage tank is connected to the output port of the hydrogen compressor through the high-pressure hydrogen storage pipeline, and a fifth hydrogen storage pneumatic valve and a sixth hydrogen storage pneumatic valve are installed on the high-pressure hydrogen storage pipeline, and the input port of the hydrogen filling machine is connected to the low-pressure hydrogen storage pipeline between the first hydrogen storage pneumatic valve and the second hydrogen storage pneumatic valve through the low-pressure hydrogen filling pipeline, and A first hydrogenation pneumatic valve is provided on the low-pressure hydrogenation pipeline, and the input port of the hydrogenation machine 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, and the input port of the hydrogenation machine 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 hydrogenation machine is connected to the hydrogenation gun through a hydrogenation hose. This constitutes a comprehensive 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 having the characteristics of simple structure and low cost.The present invention is based on an existing hydrogen refueling station and its 45MPa compressor. By connecting the second hydrogen unloading pneumatic valve in parallel with the third hydrogen unloading pneumatic valve, and connecting the third hydrogen unloading pneumatic valve in series with a pressure regulating valve, the comprehensive application of 20MPa long tube trailers and 30MPa long tube trailers is achieved. When the hydrogen long tube trailer is a 30MPa long tube trailer and its output pressure is greater than 20MPa and less than or equal to 30MPa, the pressure regulating valve is used to reduce the output pressure of the hydrogen long tube trailer to 20MPa, and then the hydrogen can normally enter the hydrogen compressor for pressurization and 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 fuel cell vehicles can be refueled like existing hydrogen refueling stations; by setting a bypass line and setting a fourth hydrogen unloading pneumatic valve on the bypass line, when the hydrogen long tube trailer is a 30MPa long tube trailer and its output pressure is greater than 25MPa and less than or equal to 30MPa, the low-pressure hydrogen storage tank can be directly connected to the hydrogen long tube trailer through the low-pressure hydrogen storage line, the bypass line, and the hydrogen unloading line, so as to store hydrogen in the low-pressure hydrogen storage tank without starting the hydrogen compressor, and directly refuel the hydrogen fuel cell vehicle at the low pressure stage through the hydrogen long tube trailer, reducing energy consumption and operating costs. When the hydrogen long tube trailer is a 30MPa long tube trailer and its output pressure is greater than 7MPa and less than or equal to 20MPa, like a 20MPa long tube trailer, by opening the second hydrogen unloading pneumatic valve to allow the hydrogen output of the hydrogen long tube trailer to directly enter the hydrogen compressor, hydrogen storage and refueling can be carried out like existing hydrogen refueling stations. 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 two long tube trailers, it avoids the waste of transformation of high-value equipment. By adopting a 30MPa long tube trailer for the hydrogen long tube trailer, the hydrogen unloading rate can be greatly improved. Compared with the 20MPa long tube trailer, the hydrogen unloading capacity is increased by more than 75%, reducing the hydrogen supply cost and improving economic benefits.

[0037] The following is a detailed description of an integrated 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

[0038] Figure 1 This is a structural schematic diagram of a comprehensive hydrogen supply system based on a 45MPa compressor of the present invention. DETAILED DESCRIPTION

[0039] 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.

[0040] like Figure 1The present invention shows a specific embodiment of a comprehensive 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 installed 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 a third hydrogen unloading pneumatic valve 24, and the third hydrogen unloading pneumatic valve 24 is connected in series with a pressure regulating valve 25. The low-pressure hydrogen storage tank 3 is connected to the output port of the hydrogen compressor 2 via a low-pressure hydrogen storage pipeline. 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 low-pressure hydrogen storage pipeline between the first and second hydrogen storage pneumatic valves 31 and 32 is connected to the hydrogen unloading pipeline between the first and second hydrogen unloading pneumatic valves 22 and 23 via a bypass pipeline. A fourth hydrogen unloading pneumatic valve 26 is installed on the bypass pipeline. The medium-pressure hydrogen storage tank 4 is connected to the output port of the hydrogen compressor 2 via a medium-pressure hydrogen storage pipeline. 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 output port of the hydrogen compressor 2 via a high-pressure hydrogen storage pipeline. 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 via a low-pressure hydrogenation pipeline, and a first hydrogenation pneumatic valve 61 is provided 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 via a medium-pressure hydrogenation pipeline, and a second hydrogenation pneumatic valve 62 is provided 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 via a high-pressure hydrogenation pipeline, and a third hydrogenation pneumatic valve 63 is provided on the high-pressure hydrogenation pipeline. The output port of the hydrogenator 6 is connected to the hydrogenation gun 64 via a hydrogenation hose. Among them, the pressure regulating valve 25 is used to adjust the output pressure of the hydrogen long tube trailer 1 to 20MPa to meet the input pressure requirement of the hydrogen compressor 2.

[0041] The above structural setting constitutes a comprehensive 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 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. By connecting the second hydrogen unloading pneumatic valve 23 in parallel with the third hydrogen unloading pneumatic valve 24, and connecting the third hydrogen unloading pneumatic valve 24 in series with the pressure regulating valve 25, the comprehensive application of 20MPa long tube trailers and 30MPa long tube trailers is realized. When the hydrogen long tube trailer 1 is a 30MPa long tube trailer and its output pressure is greater than 20MPa and less than or equal to 30MPa, the pressure regulating valve 25 is used to reduce the output pressure of the hydrogen long tube trailer 1 to 20MPa, and then the hydrogen can normally enter the hydrogen compressor 2 for pressurization and 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 then the hydrogen fuel cell vehicle 100 can be refueled with hydrogen like an existing hydrogen refueling station; by setting a bypass pipeline and setting a fourth hydrogen unloading pneumatic valve 26 on the bypass pipeline, when the hydrogen long tube trailer 1 is a 30MPa long tube trailer and its output pressure is greater than 25MPa and less than or equal to 30MPa, the low-pressure hydrogen storage tank 3 can also be directly connected to the hydrogen long tube trailer 1 through the low-pressure hydrogen storage pipeline, the bypass pipeline and the hydrogen unloading pipeline, so as to store hydrogen in the low-pressure hydrogen storage tank 3 without starting the hydrogen compressor 2, and the hydrogen fuel cell vehicle 100 can be directly refueled with hydrogen at a low pressure stage through the hydrogen long tube trailer 1, thereby reducing energy consumption and operating costs. When hydrogen tube trailer 1 is a 30MPa tube trailer and its output pressure is greater than 7MPa and less than or equal to 20MPa, as with a 20MPa tube trailer, by opening the second hydrogen unloading pneumatic valve 23, the hydrogen output from hydrogen tube trailer 1 is directly fed into hydrogen compressor 2, enabling hydrogen storage and refueling similar to existing hydrogen refueling stations. Compared to existing hydrogen refueling stations, the present invention does not require redesign or large-scale renovation. While achieving the integrated application of two tube trailers, it avoids the wasteful renovation of high-value equipment. By using a 30MPa tube trailer for hydrogen tube trailer 1, the hydrogen unloading rate can be significantly increased. Compared with a 20MPa tube trailer, the hydrogen unloading capacity is increased by over 75%, reducing hydrogen supply costs and improving economic benefits. It should be noted that in actual application, 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 27 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.

[0042] Based on the same concept, the present invention also provides a control method for the above-mentioned integrated 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 closed. When the output pressure of the hydrogen tube trailer 1 is greater than 25MPa and less than or equal to 30MPa, the hydrogen supply system operates in pressure regulation mode 1; when the output pressure of the hydrogen tube trailer 1 is greater than 20MPa and less than or equal to 25MPa, the hydrogen supply system operates in pressure regulation mode 2; and when the output pressure of the hydrogen tube trailer 1 is greater than 7MPa and less than or equal to 20MPa, the hydrogen supply system operates in normal mode. By allowing the hydrogen supply system to select different operating modes according to the different output pressure ranges of the hydrogen tube trailer 1, its functionality and adaptability are improved, making it applicable to both 20MPa tube trailers and 30MPa tube trailers.

[0043] Voltage regulation mode 1 specifically includes the following steps:

[0044] S1-1. When the pressure of the high-pressure hydrogen storage tank 5 is lower than 40 MPa, open the third hydrogen unloading pneumatic valve 24, 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 rises to 45 MPa.

[0045] By storing or replenishing hydrogen in the high-pressure hydrogen storage tank 5 through this step, the pressure of the high-pressure hydrogen storage tank 5 can be maintained in the range of 40 MPa to 45 MPa.

[0046] S1-2. When the pressure of the medium-pressure hydrogen storage tank 4 is lower than 30 MPa, open the third hydrogen unloading pneumatic valve 24, 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 rises to 35 MPa.

[0047] By storing or replenishing hydrogen in the medium-pressure hydrogen storage tank 4 through this step, the pressure of the medium-pressure hydrogen storage tank 4 can be maintained in the range of 30 MPa to 35 MPa.

[0048] S1-3. When the pressure of the low-pressure hydrogen storage tank 3 is lower than 25 MPa, open the fourth hydrogen unloading pneumatic valve 26 and the second hydrogen storage pneumatic valve 32 until the pressure of the low-pressure hydrogen storage tank 3 rises to 30 MPa or equal to the output pressure of the hydrogen long tube trailer.

[0049] By storing or replenishing hydrogen in the low-pressure hydrogen storage tank 3 through this step, the pressure of the low-pressure hydrogen storage tank 3 can be maintained above 25 MPa, and there is no need to start the hydrogen compressor 2, thereby reducing energy consumption and operating costs.

[0050] The above steps describe the hydrogen unloading, storage, and replenishment process for pressure regulation mode 1. Storage is the initial filling 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.

[0051] The pressure regulation mode 1 also includes a hydrogen filling process, that is, a process of filling the hydrogen fuel cell vehicle 100 with hydrogen, which specifically includes the following steps:

[0052] S1-4: When the pressure of the hydrogen storage tank onboard the hydrogen fuel cell vehicle 100 falls below 20 MPa, connect the hydrogen filling gun 64 to the hydrogen fuel cell vehicle 100 and open the first hydrogen filling pneumatic valve 61 and the fourth hydrogen unloading pneumatic valve 26. This step allows the hydrogen fuel cell vehicle 100 to be directly filled with hydrogen at a low pressure using the hydrogen tube trailer 1.

[0053] S1-5. When the pressure of the onboard hydrogen storage tank reaches 25 MPa, close the first hydrogen filling pneumatic valve 61 and the fourth hydrogen unloading pneumatic valve 26, and open the second hydrogen filling pneumatic valve 62 and the fourth hydrogen storage pneumatic valve 42. After the low-pressure hydrogen filling is completed, this step allows the medium-pressure hydrogen storage tank 4 to be used to fill the hydrogen fuel cell vehicle 100 with hydrogen at the medium-pressure stage.

[0054] S1-6: 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. Once the medium-pressure hydrogen filling is complete, this step allows the high-pressure hydrogen storage tank 5 to be used to fill the hydrogen fuel cell vehicle 100 with hydrogen at the high pressure stage.

[0055] S1-7. 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 hydrogen filling is complete, disconnect the hydrogenation gun 64 from the hydrogen fuel cell vehicle 100.

[0056] Voltage regulation mode 2 specifically includes the following steps:

[0057] S2-1, open the third hydrogen unloading pneumatic valve 24. This step allows the output hydrogen of the hydrogen tube trailer 1 to be reduced to 20 MPa through the pressure regulating valve 25 before entering the hydrogen compressor 2.

[0058] S2-2: When the pressure of the high-pressure hydrogen storage tank 5 falls below 40 MPa, the fifth and sixth hydrogen storage pneumatic valves 51, 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 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.

[0059] S2-3: 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 hydrogen into the intermediate-pressure hydrogen storage tank 4, maintaining the pressure of the intermediate-pressure hydrogen storage tank 4 within the range of 30 MPa to 35 MPa.

[0060] S2-4. 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.

[0061] The above steps are the hydrogen unloading and replenishing process of pressure regulation mode 2. Pressure regulation mode 2 also includes a hydrogen filling process, that is, the process of filling the hydrogen fuel cell vehicle 100 with hydrogen, which specifically includes the following steps:

[0062] S2-5: When the pressure of the hydrogen storage tank onboard the hydrogen fuel cell vehicle 100 is lower than 20 MPa, connect the hydrogen filling gun 64 to the hydrogen fuel cell vehicle 100 and open the first hydrogen filling 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 fill the hydrogen fuel cell vehicle 100 with hydrogen at a low pressure.

[0063] S2-6: 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. Once the low-pressure hydrogen filling is complete, this step allows the medium-pressure hydrogen storage tank 4 to be used to fill the hydrogen fuel cell vehicle 100 with hydrogen at the medium-pressure stage.

[0064] S2-7. 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 hydrogen filling is complete, this step allows the high-pressure hydrogen storage tank 5 to be used to fill the hydrogen fuel cell vehicle 100 with hydrogen at the high pressure stage.

[0065] S2-8. 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 hydrogen filling phase is complete, disconnect the hydrogenation gun 64 from the hydrogen fuel cell vehicle 100.

[0066] The normal mode specifically includes the following steps:

[0067] S3-1, opening the second hydrogen unloading pneumatic valve 23. This step allows the hydrogen output from the hydrogen tube trailer 1 to directly enter the hydrogen compressor 2.

[0068] S3-2: When the pressure of the high-pressure hydrogen storage tank 5 falls below 40 MPa, the fifth and sixth hydrogen storage pneumatic valves 51, 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.

[0069] S3-3: 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 stores or replenishes hydrogen in the intermediate-pressure hydrogen storage tank 4, maintaining the pressure of the intermediate-pressure hydrogen storage tank 4 within the range of 30 MPa to 35 MPa.

[0070] S3-4. When the pressure of low-pressure hydrogen storage tank 3 falls below 25 MPa, first and second hydrogen storage pneumatic valves 31 and 32 are opened, and hydrogen compressor 2 is started 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.

[0071] The above steps are the normal mode hydrogen unloading, storage and replenishment process. The normal mode also includes a hydrogen filling process, that is, the process of filling the hydrogen fuel cell vehicle 100 with hydrogen, which specifically includes the following steps:

[0072] S3-5: When the pressure of the hydrogen storage tank onboard the hydrogen fuel cell vehicle 100 is lower than 20 MPa, connect the hydrogen filling gun 64 to the hydrogen fuel cell vehicle 100 and open the first hydrogen filling 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 fill the hydrogen fuel cell vehicle 100 with hydrogen at a low pressure.

[0073] S3-6: 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. Once the low-pressure hydrogen filling is complete, this step allows the medium-pressure hydrogen storage tank 4 to be used to fill the hydrogen fuel cell vehicle 100 with hydrogen at the medium-pressure stage.

[0074] S3-7: 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. Once the medium-pressure hydrogen filling is complete, this step allows the high-pressure hydrogen storage tank 5 to be used to fill the hydrogen fuel cell vehicle 100 with hydrogen at the high pressure stage.

[0075] S3-8: 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 hydrogen filling is completed, disconnect the hydrogenation gun 64 from the hydrogen fuel cell vehicle 100.

[0076] It should be noted that, under normal circumstances, hydrogen is only refueled when the on-board hydrogen storage tank pressure of the hydrogen fuel cell vehicle 100 is lower than 20MPa. If hydrogen is refueled when the on-board hydrogen storage tank pressure is between 20MPa and 25MPa, the hydrogen refueling process of pressure regulation mode 1, pressure regulation mode 2 and conventional mode is the same as when the on-board hydrogen storage tank pressure is lower than 20MPa. If hydrogen is refueled when the on-board hydrogen storage tank pressure is between 25MPa and 30MPa, the hydrogen refueling process of pressure regulation mode 1, pressure regulation mode 2 and conventional mode should skip the hydrogen refueling process in the low-pressure stage. If hydrogen is refueled when the on-board hydrogen storage tank pressure is between 30MPa and 35MPa, the hydrogen refueling process of pressure regulation mode 1, pressure regulation mode 2 and conventional mode should skip the hydrogen refueling 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 the hydrogenation gun 64 are existing equipment in the field, and their structure, principle and connection relationship are well known to technicians.

[0077] 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 comprehensive 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 provided with a manual master control valve (21), a first hydrogen unloading pneumatic valve (22) and a second hydrogen unloading pneumatic valve (23) in sequence, and the second hydrogen unloading pneumatic valve (23) is connected in parallel with a third hydrogen unloading pneumatic valve (21). Valve (24), the third hydrogen unloading pneumatic valve (24) is connected in series with a pressure regulating valve (25), the low-pressure hydrogen storage tank (3) is connected to the output port of the hydrogen compressor (2) through a low-pressure hydrogen storage pipeline, a first hydrogen storage pneumatic valve (31) and a second hydrogen storage pneumatic valve (32) are provided on the low-pressure hydrogen storage pipeline, the low-pressure hydrogen storage pipeline between the first hydrogen storage pneumatic valve (31) and the second hydrogen storage pneumatic valve (32) 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 fourth hydrogen unloading pneumatic valve (26) is provided on the bypass pipeline, the medium-pressure storage The hydrogen tank (4) is connected to the output port of the hydrogen compressor (2) through a medium-pressure hydrogen storage pipeline, and a third hydrogen storage pneumatic valve (41) and a fourth hydrogen storage pneumatic valve (42) are provided on the medium-pressure hydrogen storage pipeline. The high-pressure hydrogen storage tank (5) is connected to the output port of the hydrogen compressor (2) through a high-pressure hydrogen storage pipeline, and a fifth hydrogen storage pneumatic valve (51) and a sixth hydrogen storage pneumatic valve (52) are provided 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. A first hydrogenation pneumatic valve (61) is provided on the hydrogenator (6); an input port of the hydrogenator (6) is connected to a medium-pressure hydrogen storage pipeline between a third hydrogen storage pneumatic valve (41) and a fourth hydrogen storage pneumatic valve (42) through a 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 a high-pressure hydrogen storage pipeline between a fifth hydrogen storage pneumatic valve (51) and a sixth hydrogen storage pneumatic valve (52) through a 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. A comprehensive hydrogen supply system based on a 45MPa compressor according to claim 1, characterized in that: A first pressure sensor (27) 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; and the pressure regulating valve (25) is used to adjust the output pressure of the hydrogen long tube trailer (1) to 20 MPa.

3. A control method for the integrated 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 25 MPa and less than or equal to 30 MPa, the hydrogen supply system is operated in the pressure regulation mode 1; when the output pressure of the hydrogen tube trailer (1) is greater than 20 MPa and less than or equal to 25 MPa, the hydrogen supply system is operated in the pressure regulation mode 2; when the output pressure of the hydrogen tube trailer (1) is greater than 7 MPa and less than or equal to 20 MPa, the hydrogen supply system is operated in the normal mode.

4. The control method of the integrated 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 40 MPa, the third hydrogen unloading pneumatic valve (24), 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; S1-2, when the pressure of the medium-pressure hydrogen storage tank (4) is lower than 30 MPa, the third hydrogen unloading pneumatic valve (24), the 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; S1-3. When the pressure of the low-pressure hydrogen storage tank (3) is lower than 25 MPa, the fourth hydrogen unloading pneumatic valve (26) 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 long tube trailer (1).

5. The control method of the integrated 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 hydrogen storage tank on the hydrogen fuel cell vehicle (100) 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 fourth hydrogenation pneumatic valve (26) are opened; S1-5. When the pressure of the onboard hydrogen storage tank rises to 25 MPa, close the first hydrogenation pneumatic valve (61) and the fourth hydrogenation pneumatic valve (26), and open the second hydrogenation pneumatic valve (62) and the fourth hydrogenation pneumatic valve (42); 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) and the sixth hydrogen storage pneumatic valve (52); S1-7. 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.

6. The control method of the integrated hydrogen supply system according to claim 3, characterized in that: The voltage regulation mode 2 includes the following steps: S2-1, opening the third hydrogen unloading pneumatic valve (24); S2-2, 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; S2-3, 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; S2-4. 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.

7. The control method of the integrated hydrogen supply system according to claim 6, characterized in that: The voltage regulation mode 2 further includes the following steps: S2-5. When the pressure of the hydrogen storage tank on the hydrogen fuel cell vehicle (100) 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; S2-6. 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); S2-7. 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); S2-8. 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.

8. The control method of the integrated hydrogen supply system according to claim 3, characterized in that: The conventional mode includes the following steps: S3-1, opening the second hydrogen unloading pneumatic valve (23); S3-2, 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; S3-3, 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; S3-4. 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.

9. The control method of the integrated hydrogen supply system according to claim 8, characterized in that: The conventional mode further comprises the following steps: S3-5, when the pressure of the hydrogen storage tank on the hydrogen fuel cell vehicle (100) 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; S3-6. 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); S3-7. 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); S3-8. 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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