Hydrogen supply system, control method of hydrogen supply system and vehicle

Abstract

This disclosure relates to a hydrogen supply system, a control method for the hydrogen supply system, and a vehicle. The hydrogen supply system includes: an intake module, including a main intake line; a gaseous hydrogen module, including a gaseous hydrogen supply device and a first hydrogen inlet pipeline connected between the gaseous hydrogen supply device and the main intake line; and a liquid hydrogen module, including a liquid hydrogen supply device, a second hydrogen inlet pipeline, and a regulating branch. The second hydrogen inlet pipeline is connected between the liquid hydrogen supply device and the main intake line. The regulating branch is connectable and disconnectable between the first and second hydrogen inlet pipelines, with at least a portion of the regulating branch located within the liquid hydrogen supply device. When the pressure of the liquid hydrogen supply device is lower than a pressure threshold or the liquid level of the liquid hydrogen supply device is lower than a level threshold, resulting in the pressure of the vaporized hydrogen not meeting the hydrogen supply requirements of the main intake line, the liquid hydrogen supply device can be pressurized to meet the hydrogen supply demand and improve vehicle performance.

Description

Technical Field

[0001] This disclosure relates to the field of hydrogen fuel cell vehicles, and more specifically, to a hydrogen supply system, a control method for the hydrogen supply system, and a vehicle. Background Technology

[0002] Hydrogen fuel cell vehicles, as a clean and efficient mode of transportation, rely heavily on their onboard hydrogen supply system, a core component whose performance directly impacts the vehicle's range, power, and safety. Currently, common onboard hydrogen supply systems include high-pressure and liquid hydrogen systems. High-pressure systems have relatively low hydrogen storage density, resulting in poor safety and limited driving range within the same storage space. While liquid hydrogen systems offer high storage density, they face challenges due to the scarcity of liquid hydrogen stations, making refueling difficult. Furthermore, liquid hydrogen technology is less mature, its liquefaction process is costly, and efficient insulation measures are required to prevent evaporation. Prolonged storage of liquid hydrogen in vehicles leads to evaporation and waste, posing safety hazards and potentially causing a lack of available hydrogen. Additionally, low liquid levels or pressures in the storage tank can result in poor pressurization and low pressure supply to the fuel cell, ultimately affecting vehicle performance. Summary of the Invention

[0003] The purpose of this disclosure is to provide a hydrogen supply system, a method for controlling the hydrogen supply system, and a vehicle to improve the vehicle's range, performance, and safety.

[0004] To achieve the above objectives, this disclosure provides a hydrogen supply system, comprising:

[0005] The intake module includes the main intake path;

[0006] The gaseous hydrogen module includes a gaseous hydrogen supply device and a first hydrogen inlet pipeline, the first hydrogen inlet pipeline being connected between the gaseous hydrogen supply device and the main gas inlet pipeline; and

[0007] The liquid hydrogen module includes a liquid hydrogen supply device, a second hydrogen inlet pipeline, and a regulating branch. The second hydrogen inlet pipeline is connected between the liquid hydrogen supply device and the main gas inlet pipeline. The regulating branch is scalably connected between the first hydrogen inlet pipeline and the second hydrogen inlet pipeline. At least a portion of the regulating branch is located in the liquid hydrogen supply device.

[0008] Optionally, the gaseous hydrogen module includes a first hydrogen filling pipeline and a first exhaust pipeline. The first hydrogen filling pipeline is connectable to the gaseous hydrogen supply device, and the first exhaust pipeline is connectable to the first hydrogen inlet pipeline.

[0009] The liquid hydrogen module includes a second hydrogen filling pipeline, a hydrogen return pipeline, and a second exhaust pipeline. The second hydrogen filling pipeline and the hydrogen return pipeline are connectable to the liquid hydrogen supply device. The second exhaust pipeline is connectable to the second hydrogen inlet pipeline, the regulating branch, the second hydrogen filling pipeline, and the hydrogen return pipeline. The hydrogen return pipeline is configured such that when the second hydrogen filling pipeline is connected to the liquid hydrogen supply device, the hydrogen return pipeline is also connected to the liquid hydrogen supply device.

[0010] Optionally, the intake module further includes a first buffer device, which is connected to the intake end of the main intake path, the outlet end of the first exhaust pipe, and the outlet end of the second exhaust pipe, respectively.

[0011] Optionally, the hydrogen supply system further includes a hydrogen elimination module, which is connected to the gaseous hydrogen module and the first buffer device.

[0012] Optionally, the hydrogen elimination module includes:

[0013] Catalytic combustion chamber;

[0014] The air intake section is connected to the catalytic combustion chamber;

[0015] The exhaust section is connected to the catalytic combustion chamber; and

[0016] The first heat exchanger is used to exchange heat between the inlet section and the outlet section.

[0017] Optionally, the hydrogen supply system further includes:

[0018] The second heat exchanger is connected to the first hydrogen inlet pipeline, the second hydrogen inlet pipeline, and the regulating branch, respectively. The regulating branch is shunt-connected to the second hydrogen inlet pipeline, and the connection points of the regulating branch to the first and second hydrogen inlet pipelines are all located between the second heat exchanger and the main gas inlet pipeline; and / or

[0019] A third heat exchanger is connected to the second hydrogen inlet pipeline, and the third heat exchanger is connected upstream of the second heat exchanger on the second hydrogen inlet pipeline.

[0020] According to a second aspect of this disclosure, a vehicle is provided, including a power unit and the aforementioned hydrogen supply system, the power unit being connected downstream of the main intake roadway, wherein the power unit is a fuel cell and / or a hydrogen internal combustion engine.

[0021] According to a third aspect of this disclosure, a control method for a hydrogen supply system is provided, using the aforementioned hydrogen supply system, the control method comprising:

[0022] The status information of the liquid hydrogen supply device is obtained, and the status information of the liquid hydrogen supply device includes at least one of real-time pressure, real-time liquid level and real-time temperature;

[0023] If the status information of the liquid hydrogen supply device is lower than the first threshold of the corresponding information, the regulating branch is controlled to connect the first hydrogen inlet pipeline and the second hydrogen inlet pipeline, and a portion of the gas in the first hydrogen inlet pipeline is directed to the second hydrogen inlet pipeline.

[0024] Optionally, the regulating branch can be connected to the second hydrogen inlet pipeline in a way that allows it to be switched on and off, and the control method includes:

[0025] If the status information of the liquid hydrogen supply device is not less than the first threshold of the corresponding information, and any one of them is lower than the second threshold of the corresponding information, wherein the second threshold is greater than the first threshold, the regulating branch is controlled to connect the first hydrogen inlet pipeline and the second hydrogen inlet pipeline, and a portion of the gas in the first hydrogen inlet pipeline is guided to the second hydrogen inlet pipeline, and / or

[0026] By controlling the second hydrogen inlet pipeline to disconnect from the main gas inlet pipeline and connecting the regulating branch to the second hydrogen inlet pipeline, the gas in the second hydrogen inlet pipeline can flow through the regulating branch.

[0027] Optionally, the control method includes:

[0028] Obtain the status information of the first hydrogen inlet pipeline, wherein the status information of the first hydrogen inlet pipeline includes at least one of real-time pressure and real-time temperature;

[0029] When the status information of the first hydrogen inlet pipeline is higher than the third threshold of the corresponding information, the regulating branch is controlled to connect the first hydrogen inlet pipeline and the second hydrogen inlet pipeline, and a portion of the gas in the second hydrogen inlet pipeline is directed to the first hydrogen inlet pipeline, wherein the third threshold is greater than the first threshold.

[0030] By employing the aforementioned technical solution, which incorporates both gaseous and liquid hydrogen modules, the hydrogen supply system can utilize either high-pressure gaseous hydrogen or cryogenic liquid hydrogen. This not only enhances hydrogen supply safety but also increases hydrogen storage capacity, reduces refueling difficulty, and meets diverse hydrogen supply needs across various application scenarios. Furthermore, a regulating branch connected to the liquid hydrogen supply unit is located between the first and second hydrogen supply pipelines. Since the gaseous hydrogen pressure and temperature in the first supply pipeline are higher than in the liquid hydrogen supply unit, when the pressure or level of the liquid hydrogen supply unit falls below the pressure or level threshold, resulting in insufficient pressure for the main intake circuit, the liquid hydrogen supply unit can be pressurized to meet the supply requirements and improve vehicle performance. The hydrogen from the regulating branch, after being heated and pressurized in the liquid hydrogen supply unit, can flow to the second supply pipeline to supply the main intake circuit, effectively improving hydrogen utilization.

[0031] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0032] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0033] Figure 1 This is a schematic diagram of a hydrogen supply system according to a first embodiment of the present disclosure.

[0034] Figure 2 This is a schematic diagram of a hydrogen supply system according to a second embodiment of the present disclosure.

[0035] Figure 3 This is a schematic diagram of a hydrogen supply system according to a third embodiment of this disclosure.

[0036] Figure 4 This is a flowchart of a control method for a hydrogen supply system according to a first embodiment of the present disclosure.

[0037] Figure 5 This is a flowchart of a control method for a hydrogen supply system according to a second embodiment of the present disclosure.

[0038] Explanation of reference numerals in the attached figures

[0039] 100-Power components;

[0040] 1-Intake module; 10-Main intake path; 101-First ejector; 102-Second ejector; 103-Pressure regulator; 11-First buffer device; 12-Mixing device; 121-Flow regulating valve; 13-Second buffer device; 14-Third exhaust pipe;

[0041] 2-Gaseous hydrogen module; 20-Gaseous hydrogen supply device; 201-Bottle neck valve; 202-Bottle tail valve; 21-First hydrogen inlet pipeline; 211-Pressure reducing valve; 22-First hydrogen refueling pipeline; 23-First exhaust pipeline;

[0042] 3-Liquid hydrogen module; 30-Liquid hydrogen supply device; 31-Second hydrogen inlet pipeline; 311-Liquid outlet shut-off valve; 32-Regulating branch; 33-Second hydrogen refueling pipeline; 34-Hydrogen return pipeline; 341-Hydrogen return branch; 35-Second exhaust pipeline;

[0043] 4-Hydrogen removal module; 41-Catalytic combustion chamber; 42-Inlet section; 43-Outlet section; 44-First heat exchanger; 45-Air compressor; 46-Flow meter;

[0044] 51-Second heat exchanger; 511-Helical piping; 52-Third heat exchanger;

[0045] 61-First electric valve; 62-Second electric valve; 63-Third electric valve; 64-Fourth electric valve; 65-Fifth electric valve; 66-Sixth electric valve. Detailed Implementation

[0046] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0047] In this disclosure, unless otherwise stated, the terms "first," "second," etc., are used to distinguish different components and are not of sequential or importance. Furthermore, in the following description, when referring to the accompanying drawings, unless otherwise explained, the same reference numerals in different drawings denote the same or similar elements.

[0048] According to one embodiment of this disclosure, a hydrogen supply system is provided, such as... Figures 1 to 3As shown, the system includes an intake module 1, a gaseous hydrogen module 2, and a liquid hydrogen module 3. The intake module 1 may include a main intake line 10. The gaseous hydrogen module 2 may include a gaseous hydrogen supply device 20 and a first hydrogen inlet pipe 21, which connects the gaseous hydrogen supply device 20 and the main intake line 10. The liquid hydrogen module 3 may include a liquid hydrogen supply device 30, a second hydrogen inlet pipe 31, and a regulating branch 32. The second hydrogen inlet pipe 31 connects the liquid hydrogen supply device 30 and the main intake line 10. The regulating branch 32 is intermittently connected between the first hydrogen inlet pipe 21 and the second hydrogen inlet pipe 31, and at least a portion of the regulating branch 32 is located within the liquid hydrogen supply device 30. It should be noted that the connection here can refer to a mechanical connection between the two. For example, the connection of the first hydrogen inlet pipe 21 between the gaseous hydrogen supply device 20 and the main gas inlet pipe 10 can mean that the pipe wall of the first hydrogen inlet pipe 21 can be mechanically connected to the gaseous hydrogen supply device 20 and the main gas inlet pipe 10. The connection between the two pipes means that the hydrogen in the pipes can move within the two pipes. For example, the connection between the first hydrogen inlet pipe 21 and the second hydrogen inlet pipe 31 can mean that the hydrogen in the first hydrogen inlet pipe 21 can move to the second hydrogen inlet pipe 31, or it can mean that the hydrogen in the second hydrogen inlet pipe 31 can move to the first hydrogen inlet pipe 21.

[0049] Through the above technical solution, by setting up a gaseous hydrogen module 2 and a liquid hydrogen module 3, the hydrogen supply system can be supplied with either high-pressure gaseous hydrogen or low-temperature liquid hydrogen. This not only improves hydrogen supply safety but also increases hydrogen storage capacity, reduces refueling difficulty, and meets the diversified hydrogen supply needs of different application scenarios. Furthermore, a regulating branch 32, partially located in the liquid hydrogen supply device 30, connects the first hydrogen supply pipeline 21 and the second hydrogen supply pipeline 31. Since the gaseous hydrogen pressure and temperature in the first hydrogen supply pipeline 21 are higher than those in the liquid hydrogen supply device 30, when the pressure or level of the liquid hydrogen supply device 30 falls below the pressure threshold or the liquid level falls below the level threshold, resulting in the pressure of the vaporized hydrogen not meeting the hydrogen supply requirements of the main intake channel 10, the liquid hydrogen supply device 30 can be pressurized to meet the hydrogen supply requirements and improve vehicle performance. The hydrogen in the regulating branch 32, after being heated and pressurized in the liquid hydrogen supply device 30, can flow to the second hydrogen supply pipeline 31 to supply the main intake channel 10, effectively improving hydrogen utilization.

[0050] It should be noted that "at least part of the regulating branch 32 is located in the liquid hydrogen supply device 30" can mean that the regulating branch 32 is entirely located in the liquid hydrogen supply device 30, or that only part of the pipeline is located in the liquid hydrogen supply device 30. The hydrogen in the regulating branch 32 can be directly connected and mixed with the hydrogen in the liquid hydrogen supply device 30, thereby increasing the temperature and pressure of the hydrogen in the liquid hydrogen supply device 30. Alternatively, the hydrogen in the regulating branch 32 may not be directly connected and mixed with the hydrogen in the liquid hydrogen supply device 30; instead, the liquid hydrogen supply device 30 may surround the regulating branch 32, and the regulating branch 32 may exchange heat with the hydrogen in the liquid hydrogen supply device 30 through the pipe wall, thereby increasing the temperature and pressure of the liquid hydrogen supply device 30. This disclosure does not limit this.

[0051] According to one embodiment of this disclosure, such as Figures 1 to 3 As shown, the hydrogen supply system may further include at least one of a second heat exchanger 51 and a third heat exchanger 52. The second heat exchanger 51 may be connected to the first hydrogen inlet pipeline 21, the second hydrogen inlet pipeline 31, and the regulating branch 32, respectively. The regulating branch 32 may be connected to the second hydrogen inlet pipeline 31 in a switchable manner, and the connection points of the regulating branch 32 with the first and second hydrogen inlet pipelines 21 and 31 are both located between the second heat exchanger 51 and the main gas inlet pipeline 10. The third heat exchanger 52 may be connected to the second hydrogen inlet pipeline 31, and when the hydrogen supply system includes both the second heat exchanger 51 and the third heat exchanger 52, the third heat exchanger 52 may be connected upstream of the second heat exchanger 51 on the second hydrogen inlet pipeline 31.

[0052] Thus, since the regulating branch 32 is connected to the second hydrogen inlet pipe 31 while simultaneously connecting the first hydrogen inlet pipe 21 and the second hydrogen inlet pipe 31, when the pressure of the liquid hydrogen supply device 30 is lower than the pressure threshold or the liquid level of the liquid hydrogen supply device 30 is lower than the liquid level threshold, it can either pressurize the liquid hydrogen supply device 30 by using hydrogen from the first hydrogen inlet pipe 21, or it can pressurize the liquid hydrogen supply device 30 by introducing hydrogen heated by the second heat exchanger 51 from the second hydrogen inlet pipe 31 into the regulating branch 32.

[0053] Specifically, a second electric valve 62 and a fourth electric valve 64 can be installed on the second hydrogen inlet pipeline 31. It should be noted that in the scheme of installing the mixing device 12 on the main gas inlet pipeline below, the fourth electric valve 64 can be a flow control valve 121 installed on the second hydrogen inlet pipeline 31, or it can be installed upstream of the flow control valve 121 on the second hydrogen inlet pipeline 31. This disclosure does not limit this. The second electric valve 62 is located between the outlet of the second heat exchanger 51 and the fourth electric valve 64. The gas inlet of the regulating branch 32 is connected between the second heat exchanger 51 and the second electric valve 62, and the gas outlet of the regulating branch 32 is connected between the second electric valve 62 and the fourth electric valve 64. A third electric valve 63 and a fifth electric valve 65 can be installed on the regulating branch 32. The fifth electric valve 65 can be located at the connection between the first hydrogen inlet pipeline 21 and the regulating branch 32. Alternatively, a check valve can be installed on the regulating branch 32. The check valve can be installed between the second electric valve 62 and the third electric valve 63 to prevent hydrogen from flowing into the regulating branch 32 from the second hydrogen inlet pipe 31 and then flowing back to the second hydrogen inlet pipe 31.

[0054] In the method of pressurizing the liquid hydrogen supply device 30 through the hydrogen in the first hydrogen inlet pipeline 21, the fifth electric valve 65 and the third electric valve 63 can be opened. The heated low-pressure pipeline hydrogen flows through the fifth electric valve 65 and the third electric valve 63 on the regulating branch 32 into the liquid hydrogen supply device 30, heating the liquid in the liquid hydrogen supply device 30 and increasing its pressure and temperature. After passing through the liquid hydrogen supply device 30, the hydrogen in the regulating branch 32 changes from a high-temperature gas to a low-temperature gas, and then returns to the second heat exchanger 51 for heating and temperature increase before flowing into the main gas inlet pipeline 10 to supply the subsequent power unit 100, thus completing the function of pressurizing gas supply.

[0055] In the method of pressurizing the liquid hydrogen supply device 30 by introducing hydrogen gas heated by the second heat exchanger 51 through the second hydrogen inlet pipeline 31 into the regulating branch 32, the second electric valve 62 can be closed and the third electric valve 63 opened. The low-temperature liquid hydrogen in the liquid hydrogen supply device 30 flows into the second hydrogen inlet pipeline 31. At this time, the liquid outlet shut-off valve 311 in the working state remains open. After passing through the liquid outlet shut-off valve 311, the low-temperature liquid is heated by the third heat exchanger 52 and the second heat exchanger 51. The high-temperature gas after vaporization is then passed through... After passing through the second heat exchanger 51, the gas flows through the third electric valve 63 in the regulating branch 32 into the liquid hydrogen supply device 30, where the liquid is heated to increase its pressure and temperature. After passing through the liquid hydrogen supply device 30, the hydrogen in the regulating branch 32 changes from a high-temperature gas to a low-temperature gas, and then returns to the second heat exchanger 51 for further heating. At this point, the second electric valve 62 can be opened to allow the gas to flow into the main intake line 10 for use by the subsequent power unit 100, thus completing the function of pressurizing the gas.

[0056] Here, the second heat exchanger 51 can be a water bath heat exchanger, which can be connected to the vehicle's thermal management module. The thermal management module controls the inlet and outlet water in the water bath heat exchanger to exchange heat with the liquids in the first hydrogen inlet pipe 21, the second hydrogen inlet pipe 31, and the regulating branch 32. Two temperature and pressure sensors can be installed on the first hydrogen inlet pipe 21, located at the inlet and outlet of the water bath heat exchanger, respectively. Similarly, two temperature and pressure sensors can be installed on the second hydrogen inlet pipe 31 and the regulating branch 32, also located at the inlet and outlet of the water bath heat exchanger. This allows for monitoring of the hydrogen pressure and temperature in the first hydrogen inlet pipe 21, the second hydrogen inlet pipe 31, and the regulating branch 32 before and after entering the water bath heat exchanger. This ensures that the system can respond promptly and adjust the corresponding pipe section when an abnormal pressure or temperature reading is detected by any of the temperature and pressure sensors.

[0057] The third heat exchanger 52 can be an air-to-air heat exchanger that exchanges heat by exchanging heat with the airflow. Cryogenic liquid hydrogen flows from the liquid hydrogen supply device 30 into the second hydrogen inlet pipe 31 and then into the air-to-air heat exchanger. After heat exchange in the air-to-air heat exchanger, it flows back into the second hydrogen inlet pipe 31 from the outlet, at which point the cryogenic liquid hydrogen becomes cryogenic gaseous hydrogen. Alternatively, the second heat exchanger 51 could be an air-to-air heat exchanger and the third heat exchanger 52 could be a water bath heat exchanger; this disclosure does not limit this.

[0058] Regarding the piping arrangement in the second heat exchanger 51, such as Figures 1 to 3As shown, the second heat exchanger 51 may further include a spiral pipe 511, which can be connected to the second hydrogen inlet pipe 31. When cryogenic liquid hydrogen flows into the second heat exchanger 51 from the second hydrogen inlet pipe 31, it will flow into the spiral pipe 511. The spiral pipe 511 can extend the flow path of the hydrogen in the second hydrogen inlet pipe 31 within the second heat exchanger 51, thereby increasing the residence time of the hydrogen in the second hydrogen inlet pipe 31 within the second heat exchanger 51. This allows for sufficient heating of the hydrogen in the second hydrogen inlet pipe 31, achieving the required hydrogen inlet temperature and pressure for the power component 100. Here, the spiral pipe 511 can also be configured as a serpentine pipe; this disclosure does not limit this. Multiple spiral pipes 511 can also be used, and the first hydrogen inlet pipe 21 and the regulating branch 32 can be connected to different spiral pipes 511, similarly extending the flow path of the hydrogen in the first hydrogen inlet pipe 21 and the regulating branch 32 within the second heat exchanger 51. Since the hydrogen in the first hydrogen inlet pipe 21 and the regulating branch 32 already possesses a certain temperature and pressure before entering the second heat exchanger 51, the second heat exchanger 51 can also include a straight pipe, and the first hydrogen inlet pipe 21 and the regulating branch 32 can also be connected to the straight pipe. This reduces the unnecessary residence time of the hydrogen in the first hydrogen inlet pipe 21 and the regulating branch 32 in the second heat exchanger 51, which is not a limitation of this disclosure. In addition, the third heat exchanger 52 can also have a spiral pipe or a serpentine pipe, and the second hydrogen inlet pipe 31 can be connected to the spiral pipe or serpentine pipe in the third heat exchanger 52 to extend the flow path of the hydrogen in the second hydrogen inlet pipe 31 in the third heat exchanger 52. This increases the residence time of the hydrogen in the second hydrogen inlet pipe 31 in the third heat exchanger 52, thus facilitating sufficient heating of the hydrogen in the second hydrogen inlet pipe 31.

[0059] Furthermore, such as Figure 2 and Figure 3 As shown, the gaseous hydrogen module 2 includes a first hydrogen refueling line 22, which is configurably connected to the gaseous hydrogen supply device 20. The liquid hydrogen module 3 includes a second hydrogen refueling line 33 and a return hydrogen line 34, which are configurably connected to the liquid hydrogen supply device 30. The return hydrogen line 34 is configured such that it is connected to the liquid hydrogen supply device 30 when the second hydrogen refueling line 33 is connected to it. The first hydrogen refueling line 22 can be connected to a high-pressure gas filling port, and the second hydrogen refueling line 33 can be connected to a cryogenic liquid hydrogen filling port. The first hydrogen refueling line 22 can be equipped with a check valve to prevent hydrogen backflow, or a filter can be installed upstream of the check valve to filter the hydrogen. Manual shut-off valves can be installed on both the second hydrogen refueling line 33 and the return hydrogen line 34 to control their opening and closing.

[0060] When the gaseous hydrogen supply device 20 needs to be filled with hydrogen, the first hydrogen filling line 22 can be connected to the high-pressure gas filling port, the bottle valve 201 and the one-way valve on the first hydrogen filling line 22 can be opened, and gaseous hydrogen can enter the gaseous hydrogen supply device 20 through the bottle valve 201 to complete the filling process of gaseous hydrogen.

[0061] When the liquid hydrogen supply device 30 needs to be filled with hydrogen, the manual shut-off valve on the second hydrogen filling line 33 can be opened to allow cryogenic liquid hydrogen to enter the liquid hydrogen supply device 30 from the second hydrogen filling line 33, completing the liquid hydrogen filling process. During the filling process, the manual shut-off valve on the return hydrogen line 34 can be opened, and the gaseous phase gas in the liquid hydrogen supply device 30 can be recovered through the return hydrogen line 34. The return hydrogen line 34 can be connected to either the return gas port or the second exhaust line 35. In this way, the gas collected through the return hydrogen line 34 can be discharged into the first buffer device 11 through the second exhaust line 35, reducing hydrogen waste. The hydrogen return line 34 may also include a hydrogen return branch 341, which can be connected to the second hydrogen inlet line 31. Here, the connection between the hydrogen return branch 341 and the second hydrogen inlet line 31 can be located at the inlet of the third heat exchanger 52. A first electric valve 61 can be installed on the hydrogen return branch 341 to control the on / off state of the connection between the hydrogen return branch 341 and the second hydrogen inlet line 31, allowing gaseous hydrogen from the liquid hydrogen supply device 30 to enter the second hydrogen inlet line 31. This avoids safety hazards caused by hydrogen venting to the outside and improves hydrogen utilization. Users can select different filling functions based on factors such as hydrogen refueling station type, distance, and waiting time to improve filling efficiency and save user time.

[0062] Furthermore, such as Figure 2 and Figure 3 As shown, the gaseous hydrogen module 2 includes a first exhaust pipe 23, which is configurably connected to the first hydrogen inlet pipe 21. The liquid hydrogen module 3 includes a second exhaust pipe 35, which is configurably connected to the second hydrogen inlet pipe 31, the regulating branch 32, the second hydrogen filling pipe 33, and the hydrogen return pipe 34. Here, both the first exhaust pipe 23 and the second exhaust pipe 35 can be equipped with safety valves. These safety valves can be automatic valves, manual valves, or both. Automatic valves can automatically open to release pressure when the corresponding position on the first exhaust pipe 23 or the second exhaust pipe 35 exceeds a pressure threshold. Manual valves can be manually opened to vent gas from the corresponding position on the first exhaust pipe 23 or the second exhaust pipe 35. This disclosure does not limit the specific type of valve. The first exhaust pipe 23 and the second exhaust pipe 35 can be directly connected to the outside atmosphere, or they can be connected to the first buffer device 11 mentioned below to reduce hydrogen waste and the chance of hydrogen being released into the atmosphere, thereby improving the safety of hydrogen use. This disclosure does not limit this either.

[0063] Here, the second exhaust pipe 35 can have a main line and multiple branches connecting to the main line. These branches can be connected to the second hydrogen inlet pipe 31, the regulating branch 32, the second hydrogen refueling pipe 33, and the hydrogen return pipe 34, respectively. Each branch can be equipped with a safety valve. The safety valve controls the exhaust from the first exhaust pipe 23 and the second exhaust pipe 35. When the hydrogen pressure in the first exhaust pipe 23 or the second exhaust pipe 35 exceeds a safe value, the corresponding safety valve can be opened to release gas from the pipe, thereby preventing an explosion caused by excessive hydrogen pressure and improving the safety of the hydrogen supply system.

[0064] In addition, a liquid outlet shut-off valve 311 is provided on the second hydrogen inlet pipeline 31. The liquid outlet shut-off valve 311 is located at the inlet of the liquid hydrogen supply device 30. The opening and closing of the liquid outlet shut-off valve 311 controls the connection between the second hydrogen inlet pipeline 31 and the liquid hydrogen supply device 30. The gaseous hydrogen supply device 20 also includes a bottle mouth valve 201 and a bottle tail valve 202. The gaseous hydrogen supply device 20 controls the connection between itself and the first hydrogen inlet pipeline 21 by controlling the opening and closing of the bottle mouth valve 201. A pressure reducing valve 211 is also provided on the first hydrogen supply pipeline 21. The pressure reducing valve 211 can be connected to the first exhaust pipeline 23 through a branch, and a safety valve can be provided on the branch connecting the pressure reducing valve 211 and the first exhaust pipeline 23. The bottle mouth valve 201 and the bottle tail valve 202 can be connected to the first exhaust pipeline 23 through a branch, or they can be directly connected to the hydrogen elimination module 4 mentioned below. This disclosure does not limit this connection.

[0065] It should be noted that one-way valves can be installed on the first hydrogen inlet pipe 21, the first hydrogen filling pipe 22, the first exhaust pipe 23, the second hydrogen inlet pipe 31, the regulating branch pipe 32, and the second exhaust pipe 35 to prevent hydrogen backflow in the pipes. Specifically, the one-way valve of the first hydrogen inlet pipe 21 can be located at the outlet of the second heat exchanger 51, the one-way valve of the second hydrogen inlet pipe 31 can be located adjacent to the liquid outlet shut-off valve 311 and between the liquid outlet shut-off valve 311 and the third heat exchanger 52, and the one-way valve of the regulating branch pipe 32 can be located at the inlet of the regulating branch pipe 32. Regarding the one-way valves on the exhaust pipes, taking the following scheme of the air intake module 1 including the first buffer device 11 as an example, the one-way valves on the first exhaust pipe 23 and the second exhaust pipe 35 can both be located near the inlet side of the first buffer device 11. Of course, the number and position of the one-way valves can also be set according to requirements, and this disclosure does not make specific limitations on this.

[0066] In one embodiment of this disclosure, such as Figure 2As shown, the intake module 1 may further include a first buffer device 11, which is connected to the intake end of the main intake path 10, the outlet end of the first exhaust pipe 23, and the outlet end of the second exhaust pipe 35. In this way, the first buffer device 11 can collect excess hydrogen from the first exhaust pipe 23 and the second exhaust pipe 35, which not only reduces the possibility of hydrogen being directly emitted into the atmosphere and improves hydrogen safety, but also reduces hydrogen waste and lowers vehicle operating costs.

[0067] Here, the main intake duct 10 may include a first ejector 101, a second ejector 102, and a pressure regulating valve 103 arranged sequentially. A one-way valve and a temperature and pressure sensor may also be provided between the first ejector 101 and the second ejector 102. The one-way valve can prevent the hydrogen gas directed to the second ejector 102 from flowing back, and the temperature and pressure sensor can monitor the temperature and pressure of the hydrogen gas before entering the power unit 100 to ensure that the power unit 100 meets the power requirements under different operating conditions. The function of the first ejector 101 is to make full use of the remaining hydrogen storage capacity of the liquid hydrogen module 3 when the liquid hydrogen module 3 is at a low pressure or low liquid level, so as to improve the hydrogen utilization rate. The function of the second ejector 102 is to make full use of the hydrogen in the first buffer device 11 to improve the hydrogen utilization rate. The first hydrogen inlet pipe 21 and the second hydrogen inlet pipe 31 can be connected to the first ejector 101, the first buffer device 11 can be connected to the second ejector 102, and the pressure regulating valve 103 can control the connection and disconnection between the main air intake pipe 10 and the power unit 100. When the main air intake pipe 10 meets the hydrogen supply pressure and flow requirements of the power unit 100 during startup, the pressure regulating valve 103 is opened, thereby realizing the startup function of the power unit 100.

[0068] In the intake module 1 including the first buffer device 11, when the power unit 100 is in the stable idle power range, the pressure reducing valve 211 on the first hydrogen inlet pipe 21 can be closed. At this time, the liquid outlet shut-off valve 311 is opened, and the cryogenic liquid hydrogen in the liquid hydrogen supply device 30 flows out from the second hydrogen inlet pipe 31 and into the third heat exchanger 52. At this time, the first electric valve 61 is opened, and part of the gas phase cryogenic gas in the liquid hydrogen supply device 30 enters the third heat exchanger 52 through the return hydrogen pipe 34 and the return hydrogen branch 341. After being fully vaporized by the second heat exchanger 51, it flows out, passes through the second hydrogen inlet pipe 31, then through the second electric valve 62 and the fourth electric valve 64, then through the first ejector 101 and into the main intake pipe 10. Then, it passes through the second ejector 102 and the pressure regulating valve 103 to enter the power unit 100, thereby supplying the power unit 100 for normal use.

[0069] When the power unit 100 is in a stable low-to-medium power range or a stable high-power range, if the hydrogen supply system is mainly supplied by the liquid hydrogen module 3, the gaseous hydrogen module 2 can adjust the pressure and flow rate through the pressure reducing valve 211. After passing through the second heat exchanger 51, it enters the first ejector 101 and mixes with the hydrogen in the second hydrogen supply pipeline 31 to supply hydrogen to the power unit 100. If the gaseous hydrogen module 2 is the main supplier, the pressure and flow rate opening of the pressure reducing valve 211 of the gaseous hydrogen module 2 can be continuously adjusted. The hydrogen in the first hydrogen supply pipeline 21 mixes with the hydrogen in the second hydrogen supply pipeline 31 through the first ejector 101 and is supplied to the power unit 100. The liquid output of the second hydrogen supply pipeline 31 can be controlled by adjusting the opening of the liquid outlet shut-off valve 311.

[0070] When the power unit 100 is in the range of frequent power changes, the low hydrogen supply pressure and slow response of the liquid hydrogen module 3 will affect the power response requirements of the power unit 100. At this time, the liquid outlet shut-off valve 311 of the liquid hydrogen module 3 will keep a constant opening. The pressure and flow rate opening of the pressure reducing valve 211 on the first hydrogen inlet pipeline 21 can be adjusted to meet the pressure requirements of the power unit 100.

[0071] When the liquid hydrogen module 3 is under low pressure or low liquid level, the hydrogen supply response of the liquid hydrogen module 3 is slow. At this time, the hydrogen supply is mainly provided by the gaseous hydrogen module 2. The hydrogen on the second hydrogen supply pipeline 31 can maximize the utilization of the remaining liquid hydrogen storage through the first ejector 101 to improve the hydrogen utilization rate.

[0072] Under the above conditions, the hydrogen collected and stored in the first buffer device 11 can be supplied to the power unit 100 for normal use through the second ejector 102, thereby maximizing the hydrogen utilization rate. A pressure sensor can also be installed in the first buffer device 11 to monitor the hydrogen pressure P within it in real time. huan If the hydrogen controller (HMS) monitors P during driving... huan The value continuously rises above the specified working pressure P in If the first exhaust pipe 23 and the second exhaust pipe 35 are leaking hydrogen, the hydrogen controller HMS (HydrogenMobility Solution) can promptly report the leak to the vehicle controller VCU (Vehicle Control Unit) and issue a shutdown inspection command, and the instrument panel will display an alarm, thus improving the overall vehicle hydrogen safety.

[0073] In addition, in embodiments where the intake module 1 may include a first buffer device 11, when the vehicle starts at normal or low temperature, to avoid the problem of excessive waiting time after the liquid hydrogen supply device 30 is filled or the pressurization time being too long when the liquid level or pressure in the device is low, thus preventing the vehicle from starting, the hydrogen already stored in the first buffer device 11 can be preferentially used (the minimum pressure threshold of the first buffer device 11 can be the minimum power requirement pressure value of the power component 100, and the maximum threshold can be the maximum power requirement pressure value of the power component 100). The hydrogen passes through the second ejector 102, activates the pressure regulating valve 103, and enters the power component 100 to achieve rapid start-up. When the first buffer device 11... When the hydrogen pressure does not meet the minimum power requirement pressure of the power unit 100, the high-pressure gaseous hydrogen supply in the gaseous hydrogen supply device 20 is activated. The high-pressure gaseous hydrogen passes through the bottle valve 201 and the overflow valve on the first hydrogen inlet pipeline 21, and then passes through the pressure reducing valve to reduce the pressure to the required pressure range of the power unit 100. After passing through the second heat exchanger 51 (taking the second heat exchanger 51 as a water bath heat exchanger as an example, at this time the whole vehicle is not started, the thermal management module is not working, and the water bath heat exchanger is not heated), the hydrogen flows out of the second heat exchanger 51, and then passes through the first ejector 101, the second ejector 102 and the pressure regulating valve 103 to enter the power unit 100, and finally realize the starting function of the power unit 100.

[0074] It should be noted that, as Figure 2 As shown, the hydrogen supply system may also include a hydrogen elimination module 4, which can be connected to the gaseous hydrogen module 2 and the first buffer device 11 respectively. In this way, when the hydrogen in the gaseous hydrogen module 2 and the first buffer device 11 is overpressurized, the hydrogen can be processed by the hydrogen elimination module 4 before being discharged into the atmosphere, thereby achieving safe hydrogen-free emissions from the hydrogen supply system.

[0075] Specifically, such as Figure 2 As shown, the hydrogen removal module 4 may include a catalytic combustion chamber 41, an inlet section 42, an outlet section 43, and a first heat exchanger 44. The inlet section 42 can be connected to the catalytic combustion chamber 41, and the outlet section 43 can also be connected to the catalytic combustion chamber 41. The other end of the outlet section 43 can be directly connected to the atmosphere, or it can be connected to a collection device; this disclosure does not limit this. The first heat exchanger 44 can exchange heat between the inlet section 42 and the outlet section 43. For the introduction of oxygen, a branch pipe can be connected to the inlet section 42, and an air compressor 45 can be installed on the branch pipe to introduce air. Here, the branch pipe and the air compressor 45 can be a bypass branch of the air compressor integrated into the power unit 100, or a completely new branch pipe and air compressor 45 can be installed; this disclosure does not limit this. Flow meters 46 can also be installed on the branch pipe, spaced apart from the air compressor 45, to monitor the flow rate of the introduced air.

[0076] Hydrogen discharged from the gaseous hydrogen module 2 or the first buffer device 11 mixes with air introduced from the air compressor 45. After passing through the flow meter 46, the air and hydrogen form a lean mixture with a concentration below the lower explosive limit of hydrogen. This mixture then passes through the first heat exchanger 44 and enters the catalytic combustion chamber 41. The hydrogen introduced from the gaseous hydrogen module 2 can be from the first hydrogen inlet pipe 21, or from the bottle neck valve 201 or the bottle tail valve 202. To reduce the probability of explosion, the hydrogen concentration can be set to be less than 4%. At the same time, to prevent the hydrogen concentration from being too low to burn, the hydrogen concentration range can be limited to 1%-2%. The first heat exchanger 44 can exchange heat between the inlet section 42 and the outlet section 43. It can not only use the heat of the gas after combustion in the outlet section 43 to raise the temperature of the gas in the inlet section 42, thereby increasing the hydrogen elimination reaction rate, but also cool the gas in the outlet section 43, reducing the temperature of the gas discharged to the outside. The catalyst in the catalytic combustion chamber 41 can be a ceramic honeycomb carrier supported on precious metals such as platinum and palladium. This allows for flameless oxidation of hydrogen and oxygen at temperatures between 150°C and 250°C, ultimately forming reaction products consisting mainly of water vapor and small amounts of unreacted inert gases such as nitrogen. These reaction products enter the exhaust section 43, are cooled by the first heat exchanger 44, and are then safely discharged into the atmosphere through the vent, achieving safe hydrogen-free emissions from the hydrogen supply system. To ensure safe hydrogen discharge even in extreme circumstances such as failure of the hydrogen removal module 4, a safety valve can be installed on the intake section 42, thus increasing safety redundancy.

[0077] Regarding the configuration of the intake module 1, in another embodiment of this disclosure, such as... Figure 3As shown, the intake module 1 may further include a mixing device 12 and a second buffer device 13 connected sequentially to the main intake line 10. The mixing device 12 can be connected to the first hydrogen inlet line 21 and the second hydrogen inlet line 31, respectively. Two flow regulating valves 121 can be connected to the inlet of the mixing device 12, and these two valves are respectively connected to the first hydrogen inlet line 21 and the second hydrogen inlet line 31. The two flow regulating valves 121 can respectively regulate the hydrogen flow rate in the first hydrogen inlet line 21 and the second hydrogen inlet line 31, thereby adjusting the proportion of hydrogen entering the mixing device 12 from the first hydrogen inlet line 21 and the second hydrogen inlet line 31. The mixing device 12 may include a connected motor and rotating blades; the motor can be turned on or off to ensure that the rotating blades participate in the mixing process. Depending on the operating conditions, the motor can be turned off, preventing the rotating blades from operating. This allows the hydrogen in the first hydrogen inlet pipe 21 and the second hydrogen inlet pipe 31 to mix naturally in the mixing device 12. Alternatively, the motor can be turned on to rotate the blades, accelerating the mixing speed of the hydrogen in the first and second hydrogen inlet pipes 21 and 31. For example, when the hydrogen supply system only uses the gaseous hydrogen supply device 20, only the flow regulating valve 121 on the first hydrogen inlet pipe 21 needs to be opened to adjust the hydrogen flow rate into the mixing device 12; in this case, the motor does not need to be started. When the hydrogen supply system only uses the liquid hydrogen supply device 30, only the flow regulating valve 121 on the second hydrogen inlet pipe 31 needs to be opened to adjust the hydrogen flow rate into the mixing device 12; in this case, the motor also does not need to be started. When the hydrogen supply system selects both gaseous hydrogen supply device 20 and liquid hydrogen supply device 30 to supply hydrogen simultaneously, the motor can be turned on to drive the rotating blades to work, thereby accelerating the hydrogen mixing in the mixing device 12, depending on the specific operating conditions. This disclosure does not limit this. In addition, after the power unit 100 is turned off, the second buffer device 13 can also store excess hydrogen from the first hydrogen inlet pipe 21 and the second hydrogen inlet pipe 31, so that it can be supplied with priority when the power unit 100 is started again.

[0078] A one-way valve may also be installed on the main air intake duct 10 between the mixing device 12 and the second buffer device 13 to prevent hydrogen in the second buffer device 13 from flowing back into the mixing device 12. A sixth electric valve 66 and a temperature and pressure sensor may also be installed on the main air intake duct 10 between the second buffer device 13 and the power unit 100. The temperature and pressure sensor can monitor the temperature and pressure of the hydrogen before it enters the power unit 100 to ensure that the power requirements of the power unit 100 are met under different operating conditions. The sixth electric valve 66 can control the opening and closing of the main air intake duct 10 and the power unit 100. When the hydrogen supply pressure and flow rate required for the start-up of the power unit 100 are met in the second buffer device 13, the sixth electric valve 66 is opened, thereby realizing the start-up function of the power unit 100. Here, to improve the safety of the main intake passage 10, a third exhaust pipe 14 with a safety valve can be installed on the main intake passage 10. The third exhaust pipe 14 can be connected to the second exhaust pipe 35 mentioned above, so as to discharge excess hydrogen in the main intake passage 10 through the second exhaust pipe 35.

[0079] Specifically, in the embodiment where a mixing device 12 and a second buffer device 13 are installed on the main intake line 10, when the vehicle starts at normal or low temperature, to avoid the problem of the liquid hydrogen supply device 30 being idle for too long after filling or the pressurization time being too long when the liquid level or pressure in the device is low, thus preventing the vehicle from starting, the high-pressure gaseous hydrogen in the gaseous hydrogen supply device 20 can be used to start the vehicle. The high-pressure gaseous hydrogen passes through the bottle valve 201 and the overflow valve on the first hydrogen inlet pipeline 21, and then passes through the pressure reducing valve to reduce the pressure to the required pressure range of the power component 100 before passing through the second heat exchanger 51 (with the second heat exchanger 51 as the reference). Taking the water bath heat exchanger as an example, at this time the whole vehicle is not started, the thermal management module is not working, and the water bath heat exchanger is not heated. After the hydrogen flows out from the second heat exchanger 51, it is adjusted to the hydrogen flow required for the start of the power unit 100 by the flow regulating valve 121 on the first hydrogen inlet pipeline 21, and then enters the mixing device 12 (at this time the whole vehicle is not powered on, and the motor and rotating blades are not working) and then enters the second buffer device 13. When the hydrogen supply pressure and flow requirements for the start of the fuel cell are met, the sixth electric valve 66 is opened to enter the power unit 100, and finally the start function of the power unit 100 is realized.

[0080] Based on the above-described solution, this disclosure also provides a vehicle comprising a power unit 100 and the aforementioned hydrogen supply system, and the vehicle possesses all the beneficial effects of the aforementioned hydrogen supply system, which will not be elaborated further here. The power unit 100 is connected downstream of the main intake circuit 10. The power unit 100 can be at least one of a fuel cell and a hydrogen internal combustion engine; that is, the vehicle can be a hydrogen internal combustion engine vehicle, a fuel cell vehicle, or a hybrid vehicle possessing both a hydrogen internal combustion engine and a fuel cell. This disclosure does not limit the specific type of vehicle. In a hydrogen internal combustion engine vehicle, the main intake circuit 10 can be connected to the hydrogen internal combustion engine; in a fuel cell vehicle, the main intake circuit 10 can be connected to the fuel cell; and in a hybrid vehicle, the main intake circuit 10 can be simultaneously connected to both the fuel cell and the hydrogen internal combustion engine.

[0081] Based on the above-described solution, this disclosure also provides a control method for a hydrogen supply system, using the aforementioned hydrogen supply system, such as... Figure 4 As shown, the control method includes step 401, which involves acquiring the status information of the liquid hydrogen supply device 30. Here, the status information of the liquid hydrogen supply device 30 may include, but is not limited to, at least one of real-time pressure, real-time liquid level, and real-time temperature; all three will be used as examples below. After acquiring the corresponding status information, the status information of the liquid hydrogen supply device 30 can be judged. If the status information of the liquid hydrogen supply device 30 is lower than the first threshold of the corresponding information, step 402 is executed, controlling the regulating branch 32 to connect the first hydrogen inlet pipe 21 and the second hydrogen inlet pipe 31, and guiding a portion of the gas in the first hydrogen inlet pipe 21 to the second hydrogen inlet pipe 31.

[0082] It should be noted that the first threshold here may include at least a first pressure threshold, a first liquid level threshold, and a first temperature threshold. When any one of the following three conditions is detected—that the real-time pressure of the liquid hydrogen supply device 30 is less than the first pressure threshold, the real-time liquid level is less than the first liquid level threshold, or the real-time temperature is less than the first temperature threshold—step 402 will be triggered, thereby triggering the regulating branch 32 and the first hydrogen inlet pipe 21 and the second hydrogen inlet pipe 31. This allows the higher-temperature hydrogen gas flow from the first hydrogen inlet pipe 21 to be poured into the second hydrogen inlet pipe 31 through the regulating branch 32. Here, in the scheme where the liquid hydrogen supply device 30 is covered by the regulating branch 32, the high-temperature hydrogen gas inside the regulating branch 32 can heat the liquid hydrogen supply device 30 outside through the pipe wall, thereby increasing the hydrogen pressure inside the liquid hydrogen supply device 30 to meet the hydrogen supply demand. In the scheme where the liquid hydrogen supply device 30 is connected to the regulating branch 32, the high-temperature hydrogen in the regulating branch 32 can also mix with the hydrogen in the liquid hydrogen supply device 30, thereby increasing the hydrogen pressure and temperature in the liquid hydrogen supply device 30 to meet the hydrogen supply requirements and improve vehicle performance. After the hydrogen in the regulating branch 32 heats and pressurizes the liquid hydrogen supply device 30, it can flow to the second hydrogen supply pipeline 31 to supply gas to the main intake pipeline 10, effectively improving the hydrogen utilization rate.

[0083] Furthermore, the regulating branch 32 can also be connected to the second hydrogen inlet pipeline 31 in a switchable manner. In this case, if the status information of the liquid hydrogen supply device 30 is not less than the first threshold of the corresponding information, and any one of them is lower than the second threshold of the corresponding information, wherein the second threshold is greater than the first threshold. It should be noted here that the second threshold may include at least a second pressure threshold, a second liquid level threshold, and a second temperature threshold, wherein the second pressure threshold is greater than the first pressure threshold, the second liquid level threshold is greater than the first liquid level threshold, and the second temperature threshold is greater than the first temperature threshold.

[0084] When the real-time pressure, real-time liquid level, and real-time temperature of the liquid hydrogen supply device 30 are all detected to be greater than the corresponding first threshold, and any one of the following three conditions occurs: the real-time pressure of the liquid hydrogen supply device 30 is less than the second pressure threshold, the real-time liquid level is less than the second liquid level threshold, or the real-time temperature is less than the second temperature threshold, it indicates that although the liquid hydrogen supply device 30 has insufficient pressure, it is not far from meeting the pressure requirements for hydrogen supply. At this time, it is possible to disconnect the second hydrogen inlet pipe 31 from the main gas inlet pipe 10 and connect the regulating branch 32 to the second hydrogen inlet pipe 31, allowing the gas in the second hydrogen inlet pipe 31 to flow through the regulating branch 32. That is, the pressurization of the liquid hydrogen supply device 30 is completed through the circulation of the second hydrogen inlet pipe 31 and the regulating branch 32. At this time, the hydrogen in the second hydrogen inlet pipe 31 is affected by the external ambient temperature, and its temperature and pressure are both higher than those of the hydrogen in the liquid hydrogen supply device 30. Therefore, the hydrogen in the second hydrogen inlet pipe 31 can be guided to the regulating branch 32. After flowing through the regulating branch 32, it flows back to the second hydrogen inlet pipe 31 through another outlet connected to the second hydrogen inlet pipe 31 via the regulating branch 32. In the scheme where the hydrogen supply system includes the second heat exchanger 51, the connection between the regulating branch 32 and the second hydrogen inlet pipe 31 can also be located between the second heat exchanger 51 and the main gas inlet 10. In this way, the temperature of the gas obtained by the regulating branch 32 from the second hydrogen inlet pipe 31 can be further increased, thereby improving the heating and pressurization effect on the liquid hydrogen supply device 30.

[0085] Experimental verification showed that, in the hydrogen supply system, the method of introducing a portion of the gas from the first hydrogen inlet pipe 21 into the regulating branch 32 to boost the pressure of the liquid hydrogen supply device 30 is superior in both pressurization effect and time required compared to the method where the second hydrogen inlet pipe 31 and the regulating branch 32 form a self-circulating loop for the liquid hydrogen supply device 30. Therefore, when at least one of the pressure, liquid level, and temperature of the liquid hydrogen supply device 30 is too low (below the corresponding first threshold), it is necessary to introduce a portion of the gas from the first hydrogen inlet pipe 21 into the regulating branch 32 to quickly improve the state of the liquid hydrogen supply device 30 and make it meet the hydrogen supply requirements of the power unit 100.

[0086] However, when the pressure, liquid level, and temperature of the liquid hydrogen supply device 30 are not too low, but at least one of them still falls short of the hydrogen supply demand (not lower than the corresponding first threshold, but lower than the second threshold), the time required and pressurization effect of the second hydrogen inlet pipe 31 and the regulating branch 32 forming a self-circulation are not significantly different compared to the scheme of introducing the first hydrogen inlet pipe 21 into the regulating branch 32. Therefore, when this condition is met, the scheme of the second hydrogen inlet pipe 31 and the regulating branch 32 forming a self-circulation can pressurize the liquid hydrogen supply device 30 without affecting the gaseous hydrogen module 2, and does not affect the gaseous hydrogen module 2 from supplying hydrogen to the power unit 100. Of course, under these conditions, while controlling the second hydrogen inlet pipe 31 and the regulating branch 32 to form a self-circulation, the regulating branch 32 can also be controlled to connect the first hydrogen inlet pipe 21 and the second hydrogen inlet pipe 31, and guide part of the gas in the first hydrogen inlet pipe 21 to the second hydrogen inlet pipe 31. Alternatively, the regulating branch 32 can be controlled to connect the first hydrogen inlet pipe 21 and the second hydrogen inlet pipe 31, and guide part of the gas in the first hydrogen inlet pipe 21 to the second hydrogen inlet pipe 31, thereby increasing the temperature and pressure of the liquid hydrogen supply device 30. This disclosure does not limit this.

[0087] Here, the regulating branch 32 can not only increase the temperature and pressure of the liquid hydrogen supply device 30, but also decrease the temperature and pressure of the first hydrogen inlet pipeline 21. In the control method for decreasing the temperature and pressure of the first hydrogen inlet pipeline 21, the status information of the first hydrogen inlet pipeline 21 can be obtained first. Here, the status information of the first hydrogen inlet pipeline 21 includes, but is not limited to, at least one of real-time pressure and real-time temperature. When the status information of the first hydrogen inlet pipeline 21 is higher than the corresponding third threshold, here, the third threshold includes at least a third pressure threshold and a third temperature threshold, wherein the third threshold is greater than the first threshold, that is, the third pressure threshold is greater than the second pressure threshold and the third temperature threshold is greater than the second temperature threshold and the first temperature threshold.

[0088] When either the real-time pressure of the first hydrogen inlet pipe 21 is greater than the third pressure threshold or the real-time temperature of the first hydrogen inlet pipe 21 is greater than the third temperature threshold, the control regulating branch 32 connects the first hydrogen inlet pipe 21 and the second hydrogen inlet pipe 31, and guides part of the gas in the second hydrogen inlet pipe 31 to the first hydrogen inlet pipe 21. In this way, since the liquid hydrogen supply device 30 covers part of the regulating branch 32, the gas will be cooled and depressurized when passing through the regulating branch 32. When the gas temperature or pressure in the first hydrogen inlet pipe 21 is too high, the low-temperature and low-pressure hydrogen can be mixed into the first hydrogen inlet pipe 21 by connecting the regulating branch 32, thereby achieving the purpose of cooling and depressurizing the first hydrogen inlet pipe 21 and improving the safety of the hydrogen supply system.

[0089] According to one embodiment of this disclosure, such as Figure 5As shown, the control method includes step 501, which controls at least one of the gaseous hydrogen module 2, liquid hydrogen module 3, and buffer device to supply gas to the power unit 100. Here, the buffer device can be the first buffer device 11 mentioned above, or the scheme mentioned above that includes the mixing device 12 and the second buffer device 13. In this way, the hydrogen supply system can be supplied with gas alone through the high-pressure gaseous hydrogen in the gaseous hydrogen module 2, or with gaseous liquid hydrogen in the liquid hydrogen module 3, or with a mixture of gaseous hydrogen module 2 and liquid hydrogen module 3. This not only improves the safety of hydrogen supply but also increases hydrogen storage capacity, reduces the difficulty of hydrogen refueling, and meets the diversified hydrogen supply needs under different application scenarios. In addition, the buffer device can also receive and store the hydrogen flowing out of the gaseous hydrogen module 2 and liquid hydrogen module 3 to cooperate with at least one of the gaseous hydrogen module 2 and liquid hydrogen module 3 to supply hydrogen to the power unit 100, or supply gas to the power unit 100 alone under special operating conditions when the vehicle starts, thereby effectively improving the hydrogen utilization rate of the hydrogen supply system.

[0090] Based on the actual operating conditions of the hydrogen supply system, the control method may further include the following steps, namely, at each interval t... 间 Obtain the ratio 'a' of the real-time power to the rated power of the power component 100; at this time, a time range greater than the interval time t can be set. 间 unit time t 单 Here, it can be set to t. 单 >t 间 That is, each unit of time t 单 Within, there can be at least one interval time t. 间 This ensures that at least two ratios 'a' can be obtained. (Unit time t) 单 and interval time t 间 The specific ratio can be guaranteed by t 单 >t 间 Based on actual needs, it can be set up for t 单 >4t 间 It can also be t 单 >5t 间 This disclosure does not impose any limitations on this matter.

[0091] In unit time t 单 In this context, the ratio 'a' obtained at the current time point and an interval 't' can be used. 间 Subtract the previously obtained ratio 'a' and obtain the absolute value of the subtraction. At this point, a threshold Δa can be set. 阈 If the absolute value of the difference between the two exceeds the threshold △a 阈 This indicates the corresponding interval time t 间 When the internal power fluctuates too much, |a can be recorded and obtained. i -a i-1 |>△a阈 The number of times b. Here, a is used. i The ratio of the real-time power of power component 100 to its rated power at the current point in time is represented by 'a'. i-1 Represents an interval time t 间 The ratio of the real-time power to the rated power of the previously obtained power component 100. Now, for the number of cycles b, a preset value b can be set for cycle b. 预 b and b 预 It must be an integer, because in a unit time t 单 Within, the number of ratios 'a' that can be obtained is (t) 单 / t 间 The integers in +1), therefore b 预 ≤(t 单 / t 间 +1), that is, b 预 The maximum value is one unit time t 单 The maximum number of ratios a that can be obtained within, b 预 The actual value can guarantee b 预 ≤(t 单 / t 间 Based on +1), the settings are determined according to the actual situation; this disclosure does not impose any limitations on this. If b ≥ b 预 This indicates that the power of the power component 100 is [increased / decreased] per unit time t. 单 If the power supply pressure changes too frequently, the power unit 100 will be in a range of frequent power fluctuations. Due to the low hydrogen supply pressure and slow response of the liquid hydrogen module 3, the power response requirements of the power unit 100 will be affected. In this case, controlling the flow rate of the second hydrogen inlet pipe 31 to remain constant will maintain a constant opening of the liquid hydrogen module 3's outlet shut-off valve 311. If the target power is greater than the real-time power, the flow rate of the first hydrogen inlet pipe 21 will be increased; if the target power is less than the real-time power, the flow rate of the first hydrogen inlet pipe 21 will be decreased. Specifically, the flow rate and pressure of the first hydrogen inlet pipe 21 can be adjusted by regulating the opening of the pressure-reducing valve 211 on the first hydrogen inlet pipe 21 to meet the pressure requirements of the power unit 100.

[0092] The above obtains the unit time t 单 In the middle, obtain |a i -a i-1 |>△a 阈 In the step of number b, if b < b 预 At this point, the system is relatively stable. For the ratio 'a', a first ratio threshold 'a' can be set for the ratio 'a'. 阈1 , when a>a 阈1 At this time, the remaining hydrogen Y in the liquid hydrogen supply device 30 can be obtained. socThe remaining hydrogen level can be obtained and determined by a liquid level sensor, or by obtaining relevant data from a temperature sensor or pressure sensor and determining it based on calculations. 阈1 The value can be set according to actual needs, and can be 10%, 15%, 17%, or 20%, etc., and this disclosure does not limit it. Regarding the hydrogen surplus Y of the liquid hydrogen supply device 30... soc A first margin threshold Y can be set according to requirements. 阈1 If Y soc ≥Y 阈1 If there is a large amount of liquid hydrogen remaining, it can be supplied by the liquid hydrogen module 3. At this time, the flow rate of the first hydrogen inlet pipe 21 can be kept constant, i.e., the opening of the pressure reducing valve 211 can be kept constant. If the target power is greater than the real-time power, the flow rate of the second hydrogen inlet pipe 31 is increased; if the target power is less than the real-time power, the flow rate of the second hydrogen inlet pipe 31 is decreased. Specifically, the output flow rate of the second hydrogen supply pipe 31 can be controlled by adjusting the opening of the liquid outlet shut-off valve 311. If Y... soc <Y 阈1 If the remaining liquid hydrogen is low, then hydrogen can be supplied mainly through the gaseous hydrogen module 2, and the flow rate of the second hydrogen inlet pipe 31 can be kept constant. If the target power is greater than the real-time power, the flow rate of the first hydrogen inlet pipe 21 will be increased; if the target power is less than the real-time power, the flow rate of the first hydrogen inlet pipe 21 will be decreased. Here, Y 阈1 The percentage can be set to 30%, 40%, or 50% as required, and this disclosure does not limit this.

[0093] If a>a 阈1 Then, based on the power ratio, it can be divided into large, medium, and small power ranges. Specifically, a range greater than a can also be set. 阈1 The second ratio threshold a 阈2 a 阈2 It can be set to 80%, 85%, or 90% depending on actual needs; this disclosure does not impose any restrictions on this. 阈1 <a≤a 阈2 When a > a, the power component 100 is stably in the low to medium power range. 阈2 At this time, the power unit 100 is stably in the high-power range. It should be noted that even if the hydrogen reserve in the liquid hydrogen supply device 30 is the same, if the power unit 100 is in different power ranges, the opening degrees of the pressure reducing valve 211 and the liquid outlet shut-off valve 311 will also be different. For example, when Y... soc <Y 阈1At the same time, although the flow rate of the second hydrogen inlet pipeline 31 remains unchanged, that is, the opening of the liquid outlet shut-off valve 311 is not adjusted, but the opening of the liquid outlet shut-off valve 311 is greater when the power component 100 is in the stable high power range than when the power component 100 is in the stable medium and low power range. The opening of the pressure reducing valve 211 is also different in the two ranges. When the power component 100 is in the stable high power range, the maximum value of the opening of the pressure reducing valve 211 it adjusts will also be greater than the maximum value of the adjustable opening of the pressure reducing valve 211 when the power component 100 is in the stable medium and low power range.

[0094] Similarly, when Y soc ≥Y 阈1 When the pressure reducing valve 211 remains unchanged, the opening of the pressure reducing valve 211 is greater when the power component 100 is in a stable high power range than when the power component 100 is in a stable medium-low power range. In addition, when the power component 100 is in a stable high power range, the maximum value of the opening of the liquid outlet shut-off valve 311 it adjusts will also be greater than the maximum value of the adjustable opening of the liquid outlet shut-off valve 311 when the power component 100 is in a stable medium-low power range.

[0095] Furthermore, in obtaining the residual hydrogen Y in the liquid hydrogen supply device 30 soc In the steps, if a≤a 阈1 At this point, the power component 100 is in a stable idle power range, and a second margin threshold Y can be set according to requirements. 阈2 Here, Y 阈2 It needs to be greater than Y 阈1 Y 阈2 The percentage can be set to 80%, 85%, or 90% as needed; this disclosure does not impose any limitations on this. If Y... soc ≥Y 阈2If the liquid hydrogen supply is sufficient, the gaseous hydrogen supply device 20 can be shut off, the bottle valve 201 can be closed, and the pressure reducing valve 211 on the first hydrogen inlet pipeline 21 can be closed. If the target power is greater than the real-time power, the flow rate of the second hydrogen inlet pipeline 31 will be increased; if the target power is less than the real-time power, the flow rate of the second hydrogen inlet pipeline 31 will be decreased. Specifically, after closing the pressure reducing valve 211 on the first hydrogen inlet pipeline 21, the liquid outlet shut-off valve 311 is opened, allowing the cryogenic liquid hydrogen in the liquid hydrogen supply device 30 to flow out from the second hydrogen inlet pipeline 31 and into the third heat exchanger 52. At this time, the first electric valve 61 is opened, and some of the gaseous cryogenic gas in the liquid hydrogen supply device 30 enters the third heat exchanger 52 through the return hydrogen pipeline 34 and the return hydrogen branch 341. After being fully vaporized in the second heat exchanger 51, it flows out, passes through the second hydrogen inlet pipeline 31, then through the second electric valve 62 and the fourth electric valve 64, then through the first ejector 101 into the main gas inlet pipeline 10, and then through the second ejector 102 and the pressure regulating valve 103 to enter the power unit 100, thereby supplying the power unit 100 for normal use.

[0096] If Y soc <Y 阈2 If the liquid hydrogen reserve is insufficient, the gaseous hydrogen supply device 20 and the pressure reducing valve 211 can be opened simultaneously with the liquid hydrogen supply device 30 supplying gas. The pressure reducing valve 211 can be kept at a small opening to supplement the gas supply to the main gas inlet 10. At this time, a third reserve threshold Y can be set. 阈3 Y 阈3 It needs to be less than Y 阈2 Y 阈3 It can be set to 30%, or to smaller values ​​such as 0, 10%, or 20%. If Y... soc ≤Y 阈3 Alternatively, the liquid hydrogen supply device 30 can be shut off, with the gaseous hydrogen supply device 20 providing the main gas supply. The liquid outlet shut-off valve 311 can be closed. If the target power is greater than the real-time power, the flow rate of the first hydrogen inlet pipe 21 is increased; if the target power is less than the real-time power, the flow rate of the first hydrogen inlet pipe 21 is decreased. Specifically, after closing the liquid outlet shut-off valve 311 on the second hydrogen inlet pipe 31, the pressure reducing valve 211 can be opened, allowing the high-pressure hydrogen in the gaseous hydrogen supply device 20 to flow out of the first hydrogen inlet pipe 21 and into the second heat exchanger 51. After being fully vaporized in the second heat exchanger 51, the hydrogen flows out, passes through the fourth electric valve 64, then through the first ejector 101 into the main gas inlet pipe 10, and then through the second ejector 102 and the pressure regulating valve 103 to enter the power unit 100, thus supplying the power unit 100 for normal operation.

[0097] Additionally, when the hydrogen balance Y in the liquid hydrogen supply device 30 soc When it is small, for example when Y socWhen the level is less than 10%, the liquid hydrogen module 3 will be at low pressure or low level, and the hydrogen supply response of the liquid hydrogen module 3 will be slow. At this time, the hydrogen supply will be mainly provided by the gaseous hydrogen module 2. The hydrogen on the second hydrogen supply pipeline 31 can be used to maximize the utilization of the remaining liquid hydrogen storage through the first ejector 101 to improve the hydrogen utilization rate. At this time, the regulating branch 32 can also be activated to pressurize the liquid hydrogen supply device 30.

[0098] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0099] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0100] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A hydrogen supply system characterized by comprising: The hydrogen supply system comprises: an air inlet module comprising an air inlet main line; a gaseous hydrogen module comprising a gaseous hydrogen supply device and a first hydrogen inlet line connected between the gaseous hydrogen supply device and the air inlet main line; and a liquid hydrogen module comprising a liquid hydrogen supply device, a second hydrogen inlet line connected between the liquid hydrogen supply device and the air inlet main line, and an adjusting branch line connectable and disconnectable between the first hydrogen inlet line and the second hydrogen inlet line, at least part of the adjusting branch line being located in the liquid hydrogen supply device, and configured to guide part of the gas in the first hydrogen inlet line into the second hydrogen inlet line when state information of the liquid hydrogen supply device is lower than a first threshold of corresponding information, wherein the state information of the liquid hydrogen supply device comprises at least one of real-time pressure, real-time liquid level and real-time temperature.

2. The hydrogen supply system according to claim 1, characterized by The gaseous hydrogen module comprises a first hydrogen supply line connectable and disconnectable with the gaseous hydrogen supply device, and a first exhaust line connectable and disconnectable with the first hydrogen inlet line, The liquid hydrogen module comprises a second hydrogen supply line and a return hydrogen line connectable and disconnectable with the liquid hydrogen supply device, and a second exhaust line connectable and disconnectable with the second hydrogen inlet line, the adjusting branch line, the second hydrogen supply line and the return hydrogen line, wherein the return hydrogen line is configured to be in communication with the liquid hydrogen supply device when the second hydrogen supply line is in communication with the liquid hydrogen supply device.

3. The hydrogen supply system according to claim 2, wherein The air inlet module further comprises a first buffer device connected with an air inlet end of the air inlet main line, an air outlet end of the first exhaust line and an air outlet end of the second exhaust line, respectively.

4. The hydrogen supply system according to claim 3, characterized by The hydrogen supply system further comprises a hydrogen consumption module connected with the gaseous hydrogen module and the first buffer device, respectively.

5. The hydrogen supply system according to claim 4, wherein The hydrogen consumption module comprises: a catalytic combustion chamber; an air inlet section connected with the catalytic combustion chamber; an air outlet section connected with the catalytic combustion chamber; and a first heat exchanger for heat exchange between the air inlet section and the air outlet section.

6. The hydrogen-donating system according to any one of claims 1 to 5, wherein The hydrogen supply system further comprises: a second heat exchanger connected with the first hydrogen inlet line, the second hydrogen inlet line and the adjusting branch line, respectively, the adjusting branch line being connectable and disconnectable to the second hydrogen inlet line, and the connection between the adjusting branch line and the first hydrogen inlet line and the second hydrogen inlet line being located between the second heat exchanger and the air inlet main line; and / or a third heat exchanger connected on the second hydrogen inlet line, and upstream of the second heat exchanger on the second hydrogen inlet line.

7. A vehicle characterized by comprising: The hydrogen supply system of any one of claims 1-6 is used in a vehicle, and the vehicle comprises a power unit connected downstream of the air inlet main line, wherein the power unit is a fuel cell and / or a hydrogen internal combustion engine.

8. A control method for a hydrogen supply system, characterized by, The control method of the hydrogen supply system of any one of claims 1-6 comprises: acquiring state information of the liquid hydrogen supply device, the state information of the liquid hydrogen supply device comprising at least one of real-time pressure, real-time liquid level and real-time temperature; If the state information of the liquid hydrogen supply device is lower than the first threshold of the corresponding information, the control method comprises:

9. The control method of a hydrogen supply system according to claim 8, characterized by, The control method comprises: If the state information of the liquid hydrogen supply device is lower than the first threshold of the corresponding information, the control method comprises: If the state information of the liquid hydrogen supply device is lower than the first threshold of the corresponding information, the control method comprises:

10. The control method of the hydrogen supply system according to claim 8, characterized by, The control method comprises: The control method comprises: The control method comprises: If the state information of the liquid hydrogen supply device is lower than the first threshold of the corresponding information, the control method comprises: If the state information of the liquid hydrogen supply device is lower than the first threshold of the corresponding information, the control method comprises: If the state information of the liquid hydrogen supply device is lower than the first threshold of the corresponding information, the control method comprises: If the state information of the liquid hydrogen supply device is lower than the first threshold of the corresponding information, the control method comprises: If the state information of the liquid hydrogen supply device is lower than the first threshold of the corresponding information, the control method comprises: If the state information of the liquid hydrogen supply device is lower than the first threshold of the corresponding information, the control method comprises: If the state information of the liquid hydrogen supply device is lower than the first threshold of the corresponding information, the control method comprises: If the state information of the liquid hydrogen supply device is lower than the first threshold of the corresponding information, the control method comprises: If the state information of the liquid hydrogen supply device is lower than the first threshold of the corresponding information, the control method comprises: If the state information of the liquid hydrogen supply device is lower than the first threshold of the corresponding information, the control method comprises: If the state information of the liquid hydrogen supply device is lower than the first threshold of the corresponding information, the control method comprises: If the state information of the liquid hydrogen supply device is lower than the first threshold of the corresponding information, the control method comprises: If the state information of the liquid hydrogen supply device is lower than the first threshold of the corresponding information, the control method comprises: If the state information of the liquid hydrogen supply device is lower than the first threshold of the corresponding information, the control method comprises: If the state information of the liquid hydrogen supply device is lower than the first threshold of the corresponding information, the control method comprises: If the state information of the liquid hydrogen supply device is lower than the first threshold of the corresponding information, the control method comprises: If the state information of the liquid hydrogen supply device is lower than the first threshold of the corresponding information, the control method comprises: If the state information of the liquid hydrogen supply device is lower than the first threshold of the corresponding information, the control method comprises: If the state information of the liquid hydrogen supply device is lower than the first threshold of the corresponding information, the control method comprises: If the state information of the liquid hydrogen supply device is lower than the first threshold of the corresponding information, the control method comprises: If the state information of the liquid hydrogen supply device is lower than the first threshold of the corresponding information, the control method comprises: If the state information of the liquid hydrogen supply device is lower than the first threshold of the corresponding information, the control method comprises: If the state information of the liquid hydrogen supply device is lower than the first threshold of the corresponding information, the control method comprises: If the state information of the liquid hydrogen supply device is lower than the first threshold of the corresponding information, the control method comprises: If the state information of the liquid hydrogen supply device is lower than the first threshold of the corresponding information, the control method comprises: If the state information of the liquid hydrogen supply device is lower than the first threshold of the corresponding information, the control method comprises: If the state information of the liquid hydrogen supply device is lower than the first threshold of the corresponding information, the control method comprises: If the state information of the liquid hydrogen supply device is lower than the

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