Vehicle-mounted liquid hydrogen system and hydrogen filling and hydrogen supply control method, control device and vehicle

Abstract

The application discloses a vehicle-mounted liquid hydrogen system, a hydrogen filling and hydrogen supply control method thereof and a vehicle. The vehicle-mounted liquid hydrogen system comprises a liquid hydrogen tank, has a gas pillow area and a liquid hydrogen area, and is provided with a liquid level sensor and a first pressure sensor. The liquid hydrogen area is connected with a hydrogen filling pipeline and a hydrogen supply pipeline through a first three-way valve. The gas pillow area is connected with a hydrogen inlet end of a recovery pipeline and a hydrogen outlet end of a pressure boosting pipeline through a second three-way valve. A hydrogen outlet end of the hydrogen supply pipeline is connected with a fuel cell. A hydrogen inlet end of the pressure boosting pipeline is connected with the liquid hydrogen area. A buffer tank is arranged on the hydrogen supply pipeline and is connected with a hydrogen outlet end of the recovery pipeline. A control device is electrically connected with the liquid level sensor, the first pressure sensor, the first three-way valve and the second three-way valve. The control device is used for controlling the first three-way valve and the second three-way valve to work according to a liquid level signal of the liquid hydrogen tank and a pressure signal of the gas pillow area. The filling rate and the filling efficiency of the liquid hydrogen tank are improved, the energy consumption is reduced, and the cruising range of the fuel cell vehicle is improved.

Description

Technical Field

[0001] This application belongs to the technical field of vehicle-mounted liquid hydrogen systems, and particularly relates to a vehicle-mounted liquid hydrogen system and its hydrogen refueling and supply control method, control device and vehicle. Background Technology

[0002] Cryogenic liquid hydrogen storage is a common method for storing hydrogen in vehicles. It involves storing cryogenic liquid hydrogen in a liquid hydrogen tank. However, due to its storage characteristics, cryogenic liquid hydrogen is prone to vaporization when heated, forming a gas cushion area inside the liquid hydrogen tank. The hydrogen pressure in the gas cushion area is unstable, which has a certain impact on the filling efficiency, filling rate, and hydrogen supply stability of the vehicle liquid hydrogen system. Summary of the Invention

[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes an on-board liquid hydrogen system and its hydrogen refueling and supply control method, control device, and vehicle, which improves the filling rate and filling efficiency of the liquid hydrogen tank, reduces energy consumption, and increases the driving range of fuel cell vehicles.

[0004] In a first aspect, this application provides an on-board liquid hydrogen system, comprising: The liquid hydrogen tank has a gas cushion area and a liquid hydrogen area, and is equipped with a liquid level sensor and a first pressure sensor. The liquid hydrogen area is connected to the hydrogen refueling pipeline and the hydrogen supply pipeline through a first three-way valve. The gas cushion area is connected to the hydrogen inlet end of the recovery pipeline and the hydrogen outlet end of the pressurization pipeline through a second three-way valve. The hydrogen outlet end of the hydrogen supply pipeline is connected to the fuel cell, and the hydrogen inlet end of the pressurization pipeline is connected to the liquid hydrogen area. A buffer tank is installed on the hydrogen supply pipeline and is connected to the hydrogen outlet end of the recovery pipeline. The control device is electrically connected to the liquid level sensor, the first pressure sensor, the first three-way valve, and the second three-way valve. The control device is used to control the operation of the first three-way valve and the second three-way valve based on the liquid level signal of the liquid hydrogen tank and the pressure signal of the gas pillow area.

[0005] According to one embodiment of this application, a first vaporizer and a first booster are provided on the hydrogen supply pipeline located between the buffer tank and the first three-way valve. The first vaporizer and the first booster are electrically connected to the control device, respectively. The hydrogen outlet of the recovery pipeline is connected to the hydrogen inlet of the first vaporizer.

[0006] According to one embodiment of this application, the booster pipeline is provided with a second vaporizer and a second booster. The second vaporizer and the second booster are electrically connected to a control device, which is used to control the operation of the second booster based on the liquid level signal and the pressure signal.

[0007] According to one embodiment of this application, a safety valve is connected to the pipeline between the gas pillow area and the second three-way valve and / or the pipeline between the hydrogen outlet end of the buffer tank and the hydrogen inlet end of the fuel cell.

[0008] According to one embodiment of this application, mechanical shut-off valves are provided on the hydrogen supply line, the recovery line, and the pressurization line, and the mechanical shut-off valves are configured to be in the open state.

[0009] Secondly, this application provides a hydrogen refueling control method for an on-board liquid hydrogen system as described in any of the technical solutions in the first aspect, comprising: Obtain hydrogenation indication signal; In response to the hydrogen refueling indication signal, the liquid level H of the liquid hydrogen tank is obtained, and the initial filling rate V0 of the liquid hydrogen tank is obtained based on H. In V0 <V max In this case, the first three-way valve is controlled to connect the hydrogen refueling pipeline and the liquid hydrogen zone to start hydrogen refueling, wherein V max The final fill rate of the liquid hydrogen tank; During hydrogenation, the real-time pressure P in the gas pillow area is obtained. i And the real-time filling rate V of the liquid hydrogen tank i ; In P i In the case of >P1, control the second three-way valve to connect the air cushion area and the buffer tank, where P1 is the minimum pressure required for liquid hydrogen to flow out of the liquid hydrogen tank; In V i =V max In this case, the first three-way valve and the second three-way valve are closed, and hydrogenation ends.

[0010] Thirdly, this application provides a hydrogen supply control method for an on-board liquid hydrogen system as described in any of the technical solutions in the first aspect, comprising: Obtain the fuel cell start-up indication signal; In response to the fuel cell start-up indication signal, the real-time liquid level H of the liquid hydrogen tank is acquired. i Compare H i H1, where H1 is the lower limit of the liquid hydrogen level in the liquid hydrogen tank; In H i In case H1, the first three-way valve is controlled to connect the hydrogen supply pipeline and the liquid hydrogen zone, and liquid hydrogen is supplied to the fuel cell through the hydrogen supply pipeline. During the hydrogen supply process, the real-time pressure P in the gas pillow area is obtained. i And compare P i And P1, where P1 is the minimum pressure required to allow liquid hydrogen to flow out of the liquid hydrogen tank; In P i When P1 is less than or equal to 1, the second three-way valve is controlled to connect the pressurization pipeline and the gas pillow area, and hydrogen is supplied to the gas pillow area through the pressurization pipeline. In response to the fuel cell shutdown indication signal, the first three-way valve and the second three-way valve are closed, and the hydrogen supply ends.

[0011] According to an embodiment of the present application, when H≤H1, the hydrogen supply control method further includes: comparing P i with P2, wherein P2 is the minimum pressure for the on-board liquid hydrogen system to maintain positive pressure, and P2<P1; when P≥P2, controlling the first three-way valve to close, controlling the second three-way valve to communicate the gas cushion area and the recovery pipeline, and supplying hydrogen to the fuel cell through the recovery pipeline; when P i <P2, controlling the first three-way valve and the second three-way valve to close, and ending the hydrogen supply.

[0012] In a fourth aspect, the present application provides a control device for an on-board liquid hydrogen system, the control device comprising a first acquisition module, a second acquisition module, a third acquisition module, a first control module, a second control module and a third control module; and / or, the control device comprises a fourth acquisition module, a fifth acquisition module, a sixth acquisition module, a fourth control module, a fifth control module and a sixth control module; wherein, the first acquisition module is configured to acquire a hydrogen refueling instruction signal; the second acquisition module is configured to respond to the hydrogen refueling instruction signal, acquire the liquid level H of the liquid hydrogen tank, and acquire the initial filling rate V0 of the liquid hydrogen tank according to H; the first control module is configured to, when V0<V max , control the first three-way valve to communicate the hydrogen refueling pipeline and the liquid hydrogen area to start hydrogen refueling, wherein V max is the final filling rate of the liquid hydrogen tank; the third acquisition module is configured to acquire the real-time pressure P of the gas cushion area during hydrogen refueling i and the real-time filling rate V of the liquid hydrogen tank i ; the second control module is configured to, when P i >P1, control the second three-way valve to communicate the gas cushion area and the buffer tank, wherein P1 is the minimum pressure required for liquid hydrogen to flow out of the liquid hydrogen tank; the third control module is configured to, when V i =V max , control the first three-way valve and the second three-way valve to close, and end hydrogen refueling; the fourth acquisition module is configured to acquire a fuel cell start instruction signal; the fifth acquisition module is configured to respond to the fuel cell start instruction signal and acquire the real-time liquid level H of the liquid hydrogen tank i , compare H i with H1, wherein H1 is the lower limit value of the liquid hydrogen level in the liquid hydrogen tank; the fourth control module is configured to, when H iIn case H1, the first three-way valve is controlled to connect the hydrogen supply pipeline and the liquid hydrogen zone, and liquid hydrogen is supplied to the fuel cell through the hydrogen supply pipeline. The sixth acquisition module is used to acquire the real-time pressure P of the gas pillow area during the hydrogen supply process. i And compare P i P1, where P1 is the minimum pressure required for liquid hydrogen to flow out of the liquid hydrogen tank; The fifth control module is used in P i When P1 is less than or equal to 1, control the second three-way valve to connect the pressurization pipeline and the gas pillow area, and supply hydrogen to the gas pillow area through the pressurization pipeline; The sixth control module is used to control the first three-way valve and the second three-way valve to close in response to the fuel cell shutdown indication signal, thus ending the hydrogen supply.

[0013] Fifthly, this application provides a vehicle including an onboard liquid hydrogen system as described in any of the technical solutions in the first aspect.

[0014] In a sixth aspect, this application provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the hydrogen refueling control method as described in the second aspect above and / or the hydrogen supply control method as described in the third aspect above.

[0015] In a seventh aspect, this application provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the hydrogen refueling control method as described in the second aspect above and / or the hydrogen supply control method as described in the third aspect above.

[0016] Eighthly, this application provides a chip including a processor and a communication interface, the communication interface and the processor being coupled together, the processor being used to run programs or instructions to implement the hydrogen refueling control method as described in the second aspect above and / or the hydrogen supply control method as described in the third aspect above.

[0017] Ninthly, this application provides a computer program product, including a computer program that, when executed by a processor, implements the hydrogen refueling control method as described in the second aspect above and / or the hydrogen supply control method as described in the third aspect above.

[0018] The above-described one or more technical solutions in the embodiments of this application have at least one of the following technical effects: By setting up a buffer tank and a recovery pipeline, when adding hydrogen through the hydrogen filling pipeline, the second three-way valve can be controlled to connect the gas pillow area and the recovery pipeline, so that the hydrogen in the gas pillow area can be recovered into the buffer tank for temporary storage, thereby reducing the pressure in the gas pillow area, thus improving the hydrogen filling efficiency and ensuring the full filling rate of liquid hydrogen in the liquid hydrogen tank.

[0019] Furthermore, by setting up a pressurization pipeline connecting the liquid hydrogen zone and the gas pillow zone of the liquid hydrogen tank, when the hydrogen pressure in the gas pillow zone is insufficient, a portion of the liquid hydrogen in the liquid hydrogen zone is vaporized and pressurized and transported to the gas pillow zone through the pressurization pipeline, so as to ensure the stability of the liquid hydrogen supply during the hydrogen supply process.

[0020] Furthermore, when liquid hydrogen is insufficient, hydrogen from the gas pillow area can be recovered through the recovery pipeline to supply the fuel cell, thereby improving the fuel cell's range and increasing the utilization rate of liquid hydrogen.

[0021] Furthermore, by setting up a liquid level sensor and a first pressure sensor, the liquid hydrogen level in the liquid hydrogen tank and the pressure in the gas pillow area are obtained in real time. This allows for timely control of the first three-way valve and the second three-way valve to connect various pipelines, facilitating control and effectively utilizing the hydrogen in the gas pillow area to regulate the entire on-board liquid hydrogen system and reuse hydrogen, thereby reducing energy consumption and effectively improving the driving range of fuel cell vehicles.

[0022] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0023] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a structural framework diagram of the vehicle-mounted liquid hydrogen system provided in the embodiments of this application.

[0024] Figure 2 This is one of the flowcharts illustrating the hydrogen refueling control method for an on-board liquid hydrogen system provided in this application embodiment.

[0025] Figure 3 This is the second schematic flowchart of the hydrogen refueling control method for the on-board liquid hydrogen system provided in the embodiments of this application.

[0026] Figure 4 This is one of the flowcharts illustrating the hydrogen supply control method for an on-board liquid hydrogen system provided in this application embodiment.

[0027] Figure 5 This is the second schematic flowchart of the hydrogen supply control method for the on-board liquid hydrogen system provided in the embodiments of this application.

[0028] Figure 6 This is one of the structural schematic diagrams of the control device for the vehicle-mounted liquid hydrogen system provided in the embodiments of this application.

[0029] Figure 7 This is the second schematic diagram of the control device of the vehicle-mounted liquid hydrogen system provided in the embodiments of this application.

[0030] Figure 8This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application.

[0031] Figure label: 1. Liquid hydrogen tank; 2. Hydrogen refueling pipeline; 3. Hydrogen supply pipeline; 4. Recovery pipeline; 5. Pressurization pipeline; 6. First three-way valve; 7. Second three-way valve; 8. Buffer tank; 9. Fuel cell; 10. Control device; 11. Liquid level sensor; 12. First vaporizer; 13. First pressurizer; 14. Second vaporizer; 15. Second pressurizer; 16. Safety relief pipeline; 17. Safety valve; 18. Hydrogen recovery system; 19. Mechanical shut-off valve; 20. Check valve; 21. Filter; 22. Pressure regulating valve; 23. First pressure sensor; 24. Second pressure sensor; 25. 26. Third pressure sensor; 27. Temperature sensor; 28. Hydrogen inlet solenoid valve; 29. ​​Filling port; 20. Flow meter; 610. First acquisition module; 620. Second acquisition module; 630. First control module; 640. Third acquisition module; 650. Second control module; 660. Third control module; 710. Fourth acquisition module; 720. Fifth acquisition module; 730. Fourth control module; 740. Sixth acquisition module; 750. Fifth control module; 760. Sixth control module; 800. Electronic equipment; 801. Processor; 802. Memory. Detailed Implementation

[0032] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0033] The following is for reference. Figure 1 This application describes an onboard liquid hydrogen system according to an embodiment of the present application.

[0034] According to some embodiments of this application, such as Figure 1 As shown, this application provides an on-board liquid hydrogen system 100, including a liquid hydrogen tank 1, a buffer tank 8, a fuel cell 9, and a control device 10.

[0035] The liquid hydrogen tank 1 has a gas cushion area and a liquid hydrogen area, and is equipped with a liquid level sensor 11 and a first pressure sensor 23. The liquid hydrogen area is connected to the hydrogen filling line 2 and the hydrogen supply line 3 through a first three-way valve 6. The gas cushion area is connected to the hydrogen inlet end of the recovery line 4 and the hydrogen outlet end of the pressurization line 5 through a second three-way valve 7. The hydrogen outlet end of the hydrogen supply line 3 is connected to the fuel cell 9, and the hydrogen inlet end of the pressurization line 5 is connected to the liquid hydrogen area.

[0036] The upper part of the internal space of liquid hydrogen tank 1 is a gas cushion area, and the lower part is a liquid hydrogen area. The liquid hydrogen area is used to contain cryogenic liquid hydrogen, and the gas cushion area is used to contain hydrogen gas formed by the vaporization of liquid hydrogen. Liquid hydrogen tank 1 is equipped with a liquid level sensor 11 to detect the liquid hydrogen level in the liquid hydrogen area, and a first pressure sensor 23 is installed in the gas cushion area to detect the pressure of hydrogen gas in the gas cushion area.

[0037] The on-board liquid hydrogen system 100 also includes a hydrogen refueling line 2, a hydrogen supply line 3, a recovery line 4, and a pressurization line 5. The liquid hydrogen tank 1, corresponding to the liquid hydrogen zone, is connected to one interface of a first three-way valve 6. The other two interfaces of the first three-way valve 6 are connected to the hydrogen outlet of the hydrogen refueling line 2 and the hydrogen inlet of the hydrogen supply line 3, respectively. The hydrogen inlet of the hydrogen refueling line 2 is used to connect to the hydrogen refueling nozzle at a hydrogen refueling station, replenishing liquid hydrogen to the liquid hydrogen tank 1 through the hydrogen refueling line 2. The hydrogen outlet of the hydrogen supply line 3 is connected to the fuel cell 9, and the liquid hydrogen in the liquid hydrogen tank 1 is transported to the fuel cell 9 through the hydrogen supply line 3 for use by the fuel cell 9. The first three-way valve 6 can be completely closed, or connected to the liquid hydrogen zone and the hydrogen refueling line 2, or connected to the liquid hydrogen zone and the hydrogen supply line 3. The liquid hydrogen tank 1 is connected to one port of the second three-way valve 7 at the position corresponding to the gas pillow area. The other two ports of the second three-way valve 7 are connected to the hydrogen inlet of the recovery pipeline 4 and the hydrogen outlet of the pressurization pipeline 5, respectively. When the recovery pipeline 4 is connected to the gas pillow area, it can recover the hydrogen in the gas pillow area. The hydrogen inlet of the pressurization pipeline 5 is connected to the liquid hydrogen area of ​​the liquid hydrogen tank 1. The pressurization pipeline 5 can vaporize the liquid hydrogen in the liquid hydrogen area and pressurize it to be transported to the gas pillow area to increase the pressure in the gas pillow area. The second three-way valve 7 can be completely closed, or connected to the gas pillow area and the recovery pipeline 4, or connected to the gas pillow area and the pressurization pipeline 5.

[0038] A buffer tank 8 is installed on the hydrogen supply line 3 and connected to the hydrogen outlet of the recovery line 4. The buffer tank 8 can be used to store hydrogen. By installing the buffer tank 8 on the hydrogen supply line 3, the liquid hydrogen output from the liquid hydrogen zone is first vaporized and enters the buffer tank 8, and then supplied to the fuel cell 9 by the buffer tank 8. This serves to buffer and stabilize the supply pressure, facilitating control. The hydrogen inlet of the buffer tank 8 is also connected to the hydrogen outlet of the recovery line 4. With the second three-way valve 7 connecting the gas pillow zone and the recovery line 4, the hydrogen in the gas pillow zone can be recovered into the buffer tank 8. This allows for further utilization of the hydrogen in the gas pillow zone and reduces the pressure in the gas pillow zone, improving hydrogen refueling efficiency and ensuring the liquid hydrogen fill rate during the refueling process.

[0039] The control device 10 is electrically connected to the liquid level sensor 11, the first pressure sensor 23, the first three-way valve 6, and the second three-way valve 7. The control device 10 is used to control the operation of the first three-way valve 6 and the second three-way valve 7 according to the liquid level signal of the liquid hydrogen tank 1 and the pressure signal of the gas pillow area.

[0040] The control device 10 can receive the liquid level signal sent by the liquid level sensor and the pressure signal sent by the first pressure sensor 23, and control the first three-way valve 6 and the second three-way valve 7 to work according to the liquid level signal and the pressure signal. Under different conditions, it can control the opening and closing of different pipelines in a timely manner to adjust the working state of the entire liquid hydrogen system. Taking the booster pipeline 5 as an example, when it is determined that the pressure in the gas pillow area is insufficient, the second three-way valve 7 is controlled to connect the booster pipeline 5 and the gas pillow area. When the pressure in the gas pillow area is sufficient, the booster pipeline 5 is closed to avoid frequent opening and closing of the booster pipeline 5 and reduce energy consumption.

[0041] According to the liquid hydrogen system provided in the embodiments of this application, by setting up a buffer tank 8 and a recovery pipeline 4, when adding hydrogen through the hydrogen addition pipeline 2, the second three-way valve 7 can be controlled to connect the gas pillow area and the recovery pipeline 4, so as to recover the hydrogen in the gas pillow area to the buffer tank 8 for temporary storage, thereby reducing the pressure in the gas pillow area, thereby improving the hydrogen addition efficiency and ensuring the filling rate of liquid hydrogen in the liquid hydrogen tank 1.

[0042] Furthermore, by setting up a pressurization pipeline 5 to connect the liquid hydrogen zone and the gas pillow zone of the liquid hydrogen tank 1, when the hydrogen pressure in the gas pillow zone is insufficient, a portion of the liquid hydrogen in the liquid hydrogen zone is vaporized and pressurized and transported to the gas pillow zone through the pressurization pipeline 5, so as to ensure the stability of the liquid hydrogen supply in the liquid hydrogen tank 1 during the hydrogen supply process.

[0043] Furthermore, when liquid hydrogen is insufficient, hydrogen from the gas pillow area can be recovered through the recovery pipeline 4 to supply fuel cell 9, thereby improving the utilization rate of liquid hydrogen and effectively enhancing the driving range of fuel cell vehicle 9.

[0044] Furthermore, by setting up a liquid level sensor 11 and a first pressure sensor 23, the liquid hydrogen level of the liquid hydrogen tank 1 and the pressure of the air cushion area are obtained in real time. This allows for timely control of the first three-way valve 6 and the second three-way valve 7 to connect various pipelines, facilitating control and effectively utilizing the hydrogen in the air cushion area to regulate the entire vehicle-mounted liquid hydrogen system 100 and reuse hydrogen, thereby reducing energy consumption and increasing range.

[0045] According to some embodiments of this application, such as Figure 1 As shown, a first vaporizer 12 and a first booster 13 are provided on the hydrogen supply pipeline 3 between the buffer tank 8 and the first three-way valve 6. The first vaporizer 12 and the first booster 13 are electrically connected to the control device 10, and the hydrogen outlet end of the recovery pipeline 4 is connected to the hydrogen inlet end of the first vaporizer 12.

[0046] The first vaporizer 12 and the first booster 13 are arranged sequentially along the flow direction of the fluid on the hydrogen supply pipeline 3. Liquid hydrogen is first vaporized into hydrogen gas by the first vaporizer 12, and then pressurized and transported to the buffer tank 8 by the first booster 13. The hydrogen outlet of the recovery pipeline 4 is connected to the hydrogen inlet of the first vaporizer 12. When the gas pillow area is connected to the recovery pipeline 4, the hydrogen gas in the gas pillow area first passes through the first vaporizer 12 and the first booster 13 before entering the buffer tank 8. This not only further vaporizes the liquid hydrogen in the hydrogen gas flowing out of the gas pillow area, but also facilitates the control of the pressure of the hydrogen gas entering the buffer tank 8.

[0047] A one-way valve 20 is provided between the first vaporizer 12 and the first booster 13 to prevent the backflow of hydrogen.

[0048] The first vaporizer 12 and the first booster 13 are electrically connected to the control device 10. The control device 10 controls the start and stop of the first vaporizer 12 and the first booster 13 to control the hydrogen pressure in the buffer tank 8.

[0049] In some embodiments, such as Figure 1 As shown, a second pressure sensor 24 may be provided on the buffer tank 8. The second pressure sensor 24 is used to detect the pressure signal of hydrogen in the buffer tank 8. The second pressure sensor 24 may be electrically connected to the control device 10. The control device 10 may control the start and stop of the first booster 13 according to the pressure signal of hydrogen in the buffer tank 8. For example, when the pressure in the buffer tank 8 is insufficient, the first booster 13 may be started. When the pressure in the buffer tank 8 is sufficient, the first booster 13 may be stopped or not started, thereby realizing the regulation of the pressure of the buffer tank 8 and ensuring the stability of the hydrogen pressure delivered to the fuel cell 9.

[0050] According to some embodiments of this application, such as Figure 1 As shown, the booster line 5 may be equipped with a second vaporizer 14 and a second booster 15. The second vaporizer 14 and the second booster 15 may be electrically connected to the control device 10 respectively. The control device 10 may be used to control the operation of the second booster 15 according to the liquid level signal and the pressure signal.

[0051] The second vaporizer 14 and the second booster 15 can be arranged sequentially along the fluid flow direction on the booster pipeline 5. After the liquid hydrogen is vaporized by the second vaporizer 14, it is pressurized and delivered to the gas pillow area by the second booster 15 to increase the gas pressure in the gas pillow area. It should be noted that the liquid hydrogen in the liquid hydrogen tank 1 can flow out of the liquid hydrogen tank 1 by itself under the action of the gas pressure in the liquid hydrogen tank 1. If the pressure in the gas pillow area is insufficient, it will affect the outflow of liquid hydrogen. By electrically connecting the second vaporizer 14 and the second booster 15 to the control device 10, if the control device 10 determines that the pressure in the gas pillow area is insufficient, the control device 10 can control the second three-way valve 7 to connect the booster pipeline 5 and the gas pillow area, and control the second vaporizer 14 and the second booster 15 to start, thereby increasing the pressure in the gas pillow area.

[0052] A one-way valve 20 is provided between the second vaporizer 14 and the second booster 15 to prevent the backflow of hydrogen.

[0053] According to some embodiments of this application, such as Figure 1 As shown, to improve the safety performance of the liquid hydrogen system, a safety valve 17 is connected to the pipeline between the gas pillow area and the second three-way valve 7 and / or the pipeline between the hydrogen outlet end of the buffer tank 8 and the hydrogen inlet end of the fuel cell 9.

[0054] The gas cushion area and the second three-way valve 7 are connected by a pipeline. A safety relief pipeline 16 is connected to the pipeline between the gas cushion area and the second three-way valve 7, and the safety relief pipeline 16 may be equipped with a safety valve 17. The section of the hydrogen supply pipeline 3 between the hydrogen outlet end of the buffer tank 8 and the hydrogen inlet end of the fuel cell 9 may also be equipped with a safety relief pipeline 16, and the safety relief pipeline 16 may be equipped with a safety valve 17. In the event of a safety risk, hydrogen gas is released by opening the safety valve 17, thereby improving the safety performance of the liquid hydrogen system.

[0055] The hydrogen outlet of the safety venting pipeline 16 can be connected to a hydrogen recovery system 18 to recover and reuse the vented hydrogen, thereby improving resource utilization.

[0056] In some embodiments, such as Figure 1 As shown, the first pressure sensor 23 can be installed on the pipeline between the gas cushion area and the second three-way valve 7, and the pressure of the gas cushion area can be indirectly obtained by detecting the pressure of the pipeline. In some other embodiments, the first pressure sensor 23 can also be directly installed on the upper end of the liquid hydrogen tank 1 to directly detect the pressure of the gas cushion area.

[0057] According to some embodiments of this application, such as Figure 1As shown, mechanical shut-off valves 19 can be installed on the hydrogen supply line 3, the recovery line 4, and the pressurization line 5. The mechanical shut-off valves 19 are configured to be in the open state. By installing mechanical shut-off valves 19, the safety performance of the liquid hydrogen system is further improved. In the event of a malfunction or a safety hazard, the mechanical shut-off valves 19 can be manually operated to cut off the hydrogen supply line 3, the recovery line 4, or the pressurization line 5. The mechanical structure has high control stability and is not prone to errors.

[0058] Among them, the mechanical shut-off valve 19 on the hydrogen supply line 3 can be located between the first vaporizer 12 and the first three-way valve 6, and the mechanical shut-off valve 19 on the pressurization line 5 can be located between the second vaporizer 14 and the liquid hydrogen zone.

[0059] In some embodiments, such as Figure 1 As shown, the hydrogen inlet of the hydrogen filling pipeline 2 can be equipped with a filling port 28. The hydrogen filling pipeline 2 can be equipped with a one-way valve 20, a filter 21, and a flow meter 29. The one-way valve 20 is set to prevent liquid hydrogen backflow. The filter 21 is set to improve the purity of liquid hydrogen in the liquid hydrogen tank 1. The flow meter 29 is used to detect the flow rate signal of liquid hydrogen. The flow meter 29 can be electrically connected to the control device 10. The control device 10 can adjust the valve opening through the flow rate signal to ensure the stability of the filling process.

[0060] In some embodiments, such as Figure 1 As shown, a one-way valve 20 can be installed on the recovery pipeline 4. The one-way valve 20 is directed from the second three-way valve 7 to the buffer tank 8 to avoid backflow.

[0061] In some embodiments, such as Figure 1 As shown, the section of the hydrogen supply pipeline 3 between the hydrogen outlet of the buffer tank 8 and the hydrogen inlet of the fuel cell 9 is equipped with a filter 21, a pressure regulating valve 22, a third pressure sensor 25, a temperature sensor 26, and a hydrogen inlet solenoid valve 27 arranged sequentially along the hydrogen flow direction. The third pressure sensor 25, temperature sensor 26, and hydrogen inlet solenoid valve 27 are all electrically connected to the control device 10. The filter 21 further filters the hydrogen supplied to the fuel cell 9. The pressure regulating valve 22 further regulates the hydrogen pressure output from the buffer tank 8, improving the stability of the hydrogen entering the fuel cell 9. The third pressure sensor 25 and temperature sensor 26 accurately determine the state of the hydrogen entering the fuel cell 9, ensuring that the hydrogen entering the fuel cell 9 meets the usage requirements. The hydrogen inlet solenoid valve 27 facilitates the control of the hydrogen inlet switch of the fuel cell 9.

[0062] The hydrogen refueling control method, hydrogen supply control method, control device 10, electronic equipment, and readable storage medium of the on-board liquid hydrogen system 100 provided in this application will be described in detail below with reference to the accompanying drawings and through specific embodiments and application scenarios.

[0063] The hydrogen refueling control method and hydrogen supply control method of the on-board liquid hydrogen system 100 can be applied to the terminal, and can be executed by the hardware or software in the terminal.

[0064] The terminal includes, but is not limited to, portable communication devices such as mobile phones or tablets with touch-sensitive surfaces (e.g., touchscreen displays and / or touchpads). It should also be understood that, in some embodiments, the terminal may not be a portable communication device, but rather a desktop computer with touch-sensitive surfaces (e.g., touchscreen displays and / or touchpads).

[0065] The following embodiments describe a terminal including a display and a touch-sensitive surface. However, it should be understood that the terminal may include one or more other physical user interface devices such as a physical keyboard, mouse, and joystick.

[0066] The hydrogen refueling control method and hydrogen supply control method of the on-board liquid hydrogen system 100 provided in this application embodiment can be executed by an electronic device or a functional module or functional entity in an electronic device that can implement the hydrogen refueling control method and hydrogen supply control method of the on-board liquid hydrogen system 100. The electronic devices mentioned in this application embodiment include, but are not limited to, mobile phones, tablet computers, computers, cameras and wearable devices. The following uses an electronic device as the execution subject to describe the hydrogen refueling control method and hydrogen supply control method of the on-board liquid hydrogen system 100 provided in this application embodiment.

[0067] like Figure 2 As shown, according to some embodiments of this application, this application also provides a hydrogen refueling control method for an on-board liquid hydrogen system 100 as described above, the hydrogen refueling control method including steps 210, 220, 230, 240, 250 and 260.

[0068] It should be noted that since the vehicle-mounted liquid hydrogen system 100 is any of the above-mentioned technical solutions, the technical features and effects of the vehicle-mounted liquid hydrogen system 100, including any of the above-mentioned technical solutions, will not be elaborated here.

[0069] Step 210: Obtain the hydrogenation indication signal; In step 210, after the hydrogen refueling gun of the liquid hydrogen refueling station is connected to the filling port 28 at the hydrogen inlet of the hydrogen refueling pipeline 2, a hydrogen refueling indication signal will be sent.

[0070] Step 220: Obtain the liquid level H of liquid hydrogen tank 1, and obtain the initial filling rate V0 of liquid hydrogen tank 1 based on H; In step 220, in response to the hydrogen refueling indication signal, the liquid hydrogen system begins to execute the hydrogen refueling mode, and the control module first performs a self-test. By acquiring the liquid level H of liquid hydrogen tank 1, the initial filling rate V0 of liquid hydrogen tank 1 can be calculated from H. The filling rate is the ratio of the liquid volume of the cryogenic container filled with liquefied gas to the geometric volume of the container. The volume of liquid hydrogen in the liquid-cooled tank can be calculated from the liquid level H, and then the filling rate can be calculated.

[0071] Step 230, in V0 <V max In this case, the first three-way valve 6 is controlled to connect the hydrogen refueling pipeline 2 and the liquid hydrogen zone, and hydrogen refueling begins, wherein V max The final filling rate of liquid hydrogen tank 1; In step 230, at V0 <V max In this case, it indicates that the filling rate of liquid hydrogen tank 1 has not yet reached the maximum value, which meets the conditions for adding liquid hydrogen. The first three-way valve 6 is controlled to connect the hydrogen filling pipeline 2 and the liquid hydrogen zone, and hydrogen filling begins. Hydrogen is added to the liquid hydrogen zone of liquid hydrogen tank 1 through the hydrogen filling pipeline 2.

[0072] Step 240: During the hydrogenation process, obtain the real-time pressure P in the gas pillow area. i And the real-time filling rate V of liquid hydrogen tank 1 i ; In step 240, during the liquid hydrogen injection process, the actual pressure P in the gas pillow area is acquired in real time. i And the real-time filling rate V of liquid hydrogen tank 1 i This is to facilitate determining the filling status of liquid hydrogen tank 1.

[0073] Step 250, at P i In the case of >P1, control the second three-way valve 7 to connect the air cushion area and the buffer tank 8, where P1 is the minimum pressure required for liquid hydrogen to flow out of the liquid hydrogen tank 1; In step 250, P1 is the minimum pressure required to allow liquid hydrogen to flow out of liquid hydrogen tank 1. That is, as long as the pressure in the gas pillow area is P1, the liquid hydrogen system can operate normally. i In the case of >P1, excess pressure may create resistance to the filling of liquid hydrogen, and excessive pressure reaching the termination filling pressure may also cause the filling to end prematurely, thus preventing the filling rate of liquid hydrogen tank 1 from reaching the designed maximum filling rate, which is also the termination filling rate V. max This is detrimental to the economic efficiency of on-board liquid hydrogen storage. By controlling the second three-way valve 7 to connect the air cushion area and the buffer tank 8, the excess gas pressure in the air cushion area can be recovered and stored in the buffer tank 8. During the recovery process, the first vaporizer 12 and the first booster 13 can be started simultaneously to increase the pressure and recovery efficiency. On the one hand, the pressure in the air cushion area decreases, which can improve the hydrogen refueling efficiency.

[0074] Step 260, in Vi =V max In this case, control the first three-way valve 6 and the second three-way valve 7 to close, and hydrogenation ends.

[0075] In step 260, in V i =V max When the real-time filling rate of liquid hydrogen tank 1 reaches the termination filling rate, the first three-way valve 6 and the second three-way valve 7 are closed to complete the hydrogen addition.

[0076] According to the hydrogenation control method provided in the embodiments of this application, by setting up a buffer tank 8 and a recovery pipeline 4, when adding hydrogen through the hydrogenation pipeline 2, the second three-way valve 7 can be controlled to connect the gas pillow area and the recovery pipeline 4 when the pressure in the gas pillow area is high, so as to recover the hydrogen in the gas pillow area to the buffer tank 8 for temporary storage, thereby reducing the pressure in the gas pillow area, thereby improving the hydrogenation efficiency and ensuring the filling rate of liquid hydrogen in the liquid hydrogen tank 1.

[0077] Understandably, after step 240, the hydrogenation control method also includes step 251.

[0078] Step 251, at P i When P1 is less than or equal to 7, the second three-way valve 7 is closed.

[0079] In step 251, at P i If the pressure is ≤P1, it means that the pressure in the gas pillow area just meets the minimum pressure for liquid hydrogen outflow, or it can no longer meet the minimum pressure for liquid hydrogen outflow. By controlling the second three-way valve 7 to close the recovery pipeline 4, the hydrogen in the gas pillow area will not flow out, thus accumulating the hydrogen in the gas pillow area to facilitate the normal hydrogen supply when the liquid hydrogen system is working normally.

[0080] According to some embodiments of this application, such as Figure 3 As shown, the hydrogenation control method includes steps 301 to 308.

[0081] Step 301: Obtain the hydrogenation indication signal; Step 302: Control device 10 performs a self-test; Step 303: Determine the fill rate V <V max Is it valid? In step 303, V includes the initial fill rate V0 and the real-time fill rate V0. i Compare V0 and V before starting to add fuel. max After starting to add fuel, compare V i and V max .

[0082] Step 304: If the result in step 303 is yes, control the first three-way valve 6 to connect the hydrogen refueling pipeline 2 and the liquid hydrogen zone to start refueling; Step 305, Determine P i Does ≤P1 hold true? Step 306: If the result of step 305 is yes, control the second three-way valve 7 to close, and control the first vaporizer 12 and the first booster 13 to close. If the result in step 305 is negative, control the second three-way valve 7 to connect the recovery pipeline 4 and the buffer tank 8, and control the first vaporizer 12 and the first booster 13 to start, and recover the hydrogen in the gas pillow area. Step 308: If the result in step 303 is negative, the hydrogenation process ends.

[0083] According to some embodiments of this application, such as Figure 4 As shown, this application also provides a hydrogen supply control method for an on-board liquid hydrogen system 100, including steps 410, 420, 430, 440, 450 and 460.

[0084] It should be noted that since the vehicle-mounted liquid hydrogen system 100 is any of the above-mentioned technical solutions, the technical features and effects of the vehicle-mounted liquid hydrogen system 100, including any of the above-mentioned technical solutions, will not be elaborated here.

[0085] Step 410: Obtain the start-up indication signal for fuel cell 9; Step 420: In response to the start-up indication signal of fuel cell 9, acquire the real-time liquid level H of liquid hydrogen tank 1. i Compare H i H1, where H1 is the lower limit of the liquid hydrogen level in liquid hydrogen tank 1; In step 420, H1 is the lower limit of the liquid hydrogen level in liquid hydrogen tank 1. That is, if the liquid hydrogen level in liquid hydrogen tank 1 is at or below H1, it is considered that there is insufficient liquid hydrogen in liquid hydrogen tank 1 and it cannot be used. After obtaining the start-up indication signal of fuel cell 9, the real-time liquid hydrogen level H1 of liquid hydrogen tank 1 is obtained. i To determine whether the liquid hydrogen in liquid hydrogen tank 1 is sufficient.

[0086] Step 430, in H i In case of >H1, control the first three-way valve 6 to connect the hydrogen supply line 3 and the liquid hydrogen zone, and supply liquid hydrogen to the fuel cell 9 through the hydrogen supply line 3; In step 430, at H i In case H1, assuming that the liquid hydrogen in the liquid hydrogen tank 1 is sufficient, the first three-way valve 6 is controlled to connect the hydrogen supply line 3 and the liquid hydrogen zone. The liquid hydrogen in the liquid hydrogen zone is supplied to the fuel cell 9 through the hydrogen supply line 3. During the hydrogen supply process, the first vaporizer 12 and the first booster 13 are simultaneously activated to pressurize the hydrogen gas after it has been vaporized by the first vaporizer 12.

[0087] Step 440, during the hydrogen supply process, acquire the real-time pressure P of the gas cushion area i and compare P i with P1, wherein P1 is the minimum pressure required for liquid hydrogen to flow out of the liquid hydrogen tank 1; In step 440, P1 is the minimum pressure that can satisfy liquid hydrogen flowing out of the liquid hydrogen tank 1, and by comparing the real-time pressure P i with P1, it is judged whether the pressure in the gas cushion area is sufficient for liquid hydrogen to flow out.

[0088] Step 450, when P i ≤ P1, control the second three-way valve 7 to communicate the pressurization pipeline 5 with the gas cushion area, and supply hydrogen to the gas cushion area through the pressurization pipeline 5; It can be understood that, in order to facilitate smooth outflow of liquid hydrogen, the pressure of the gas cushion area needs to be not less than P1. When P i < P1, the pressure of the gas cushion area is insufficient to allow smooth outflow of liquid hydrogen; when P i = P1, the pressure of the gas cushion area easily decreases below P1 as liquid hydrogen flows out. Therefore, in actual working conditions, to maintain the working stability of the system, it is necessary to make P i > P1. When P i ≤ P1, control the second three-way valve 7 to communicate the pressurization pipeline 5 with the gas cushion area, turn on the second vaporizer 14 and the second booster 15 on the pressurization pipeline 5, and the liquid hydrogen flowing out of the liquid hydrogen area is vaporized by the second vaporizer 14, and the obtained hydrogen is pressurized by the second booster 15 and then conveyed to the gas cushion area, so as to increase the pressure of the gas cushion area.

[0089] Step 460, in response to the shutdown instruction signal of the fuel cell 9, control the first three-way valve 6 and the second three-way valve 7 to close, and the hydrogen supply is completed.

[0090] It should be noted that after receiving the shutdown instruction signal of the fuel cell 9, the first vaporizer 12, the first booster 13, the second vaporizer 14 and the second booster 15 are also controlled to shut down.

[0091] According to the hydrogen supply control method provided by the embodiments of the present application, when the pressure in the gas cushion area is insufficient, the second three-way valve 7 is controlled to communicate the pressurization pipeline 5 with the gas cushion area, so as to increase the pressure in the gas cushion area and ensure the working stability of the system.

[0092] In some embodiments, after step 450, the hydrogen supply control method may comprise: Step 451, when P i = P3, control the second three-way valve 7 to close.

[0093] In step 451, P3>P2, wherein P3 is a pressure value that can satisfy the stable outflow of liquid hydrogen from the liquid hydrogen tank 1 for a certain period of time. By setting P3, after pressurization for a period of time, the second three-way valve 7, the second vaporizer 14 and the second supercharger 15 are closed, so that the pressurization pipeline 5 is controlled according to the pressure of the gas cushion area, realizing intermittent start-up and reducing energy consumption.

[0094] According to some embodiments of the present application, when H≤H1, the hydrogen supply control method further comprises: Step 470: comparing P i with P2, wherein P2 is the minimum pressure for the on-board liquid hydrogen system 100 to maintain positive pressure, and P2<P1; P2 is the minimum pressure for the on-board liquid hydrogen system 100 to maintain positive pressure when the liquid hydrogen tank 1 is at the minimum liquid hydrogen level; It can be understood that since the liquid hydrogen system is filled with hydrogen, and hydrogen is flammable, it is necessary to maintain positive pressure at all times to prevent external air from invading into the liquid hydrogen tank 1 and causing potential safety hazards. In step 470, P2 is the minimum pressure for the on-board liquid hydrogen system 100 to maintain positive pressure when the liquid hydrogen tank 1 is at the minimum liquid hydrogen level, that is, P needs to be maintained at all times i is not less than P2.

[0095] Step 480: when P≥P2, controlling the first three-way valve 6 to close, and controlling the second three-way valve 7 to communicate the gas cushion area and the recovery pipeline 4, and supplying hydrogen to the fuel cell 9 through the recovery pipeline 4; When the liquid level in the liquid hydrogen tank 1 is at or lower than H1, it indicates that the liquid hydrogen in the liquid hydrogen tank 1 can no longer be supplied, the first three-way valve 6 is controlled to close, and the hydrogen supply pipeline 3 is cut off to stop the supply of liquid hydrogen. When P≥P2, it indicates that the remaining hydrogen in the liquid hydrogen tank 1 can still ensure the positive pressure environment of the liquid hydrogen system and can continue to be used. The second three-way valve 7 is controlled to communicate the gas cushion area and the recovery pipeline 4, the hydrogen in the gas cushion area is recovered into the buffer tank 8, and hydrogen is continuously supplied to the fuel cell 9 through the buffer tank 8, so that the fuel cell can still continue to work when the liquid hydrogen drops to the minimum liquid level, maximize the utilization of hydrogen fuel, and further improve the cruising range of the fuel cell 9 vehicle.

[0096] Step 490: when P i <P2, controlling the first three-way valve 6 and the second three-way valve 7 to close, and the hydrogen supply ends.

[0097] In step 490, when P i <P2, it indicates that the pressure in the gas cushion area is lower than the minimum threshold. To ensure the safety of the liquid hydrogen system, the first three-way valve 6 and the second three-way valve 7 are controlled to close, so as to cut off all pipelines and end the hydrogen supply.

[0098] According to some embodiments of the present application, such as Figure 5As shown, the hydrogen supply method provided in this application includes steps 501 to 510.

[0099] Step 501: Obtain the start-up indication signal of fuel cell 9; Step 502: Control device 10 performs a self-test; Step 503: Determine the liquid level H i Is H1 true? Step 504: If the result of step 503 is yes, control the first three-way valve 6 to connect the hydrogen supply pipeline 3 and the liquid hydrogen zone, and control the first vaporizer 12 and the first booster 13 to start, so that hydrogen fuel is supplied or recovered to the buffer tank 8, and then transported from the buffer tank 8 to the fuel cell 9. Step 505, determine P i Does ≤P1 hold true? Step 506: If the result of step 505 is yes, control the second three-way valve 7 to connect the booster pipe 5 and the air cushion area, and control the second vaporizer 14 and the second booster 15 to start. If the result of step 505 is negative, return to step 503; Step 507: If the result of step 503 is negative, determine P. i Does ≥P2 hold true? Step 508: If the result of step 508 is yes, control the first three-way valve 6 to close and control the second three-way valve 7 to connect the recovery pipeline 4 and the gas pillow area, so that hydrogen fuel can continue to be supplied or recovered to the buffer tank 8. Step 509: If the result of step 508 is negative, control the first three-way valve 6, the second three-way valve 7, the first vaporizer 12, the first booster 13, the second vaporizer 14, and the second booster 15 to close. Step 510: Hydrogen supply ends.

[0100] The hydrogen refueling control method and / or hydrogen supply control method of the on-board liquid hydrogen system 100 provided in this application embodiment can be executed by the control device 10 of the on-board liquid hydrogen system 100. This application embodiment uses the control device 10 of the on-board liquid hydrogen system 100 executing the hydrogen refueling control method and / or hydrogen supply control method of the on-board liquid hydrogen system 100 as an example to illustrate the control device 10 of the on-board liquid hydrogen system 100 provided in this application embodiment.

[0101] This application also provides a control device for an on-board liquid hydrogen system 100.

[0102] like Figure 6 and Figure 7As shown, the control device of the vehicle-mounted liquid hydrogen system 100 includes a first acquisition module 610, a second acquisition module 620, a first control module 630, a third acquisition module 640, a second control module 650, and a third control module 660; and / or, the control device includes a fourth acquisition module 710, a fifth acquisition module 720, a fourth control module 730, a sixth acquisition module 740, a fifth control module 750, and a sixth control module 760.

[0103] The first acquisition module 610 is used to acquire the hydrogenation indication signal; The second acquisition module 620 is used to acquire the liquid level H of liquid hydrogen tank 1 in response to the hydrogenation indication signal, and acquire the initial filling rate V0 of liquid hydrogen tank 1 based on H. The first control module 630 is used in V0 <V max In this case, the first three-way valve 6 is controlled to connect the hydrogen refueling pipeline 2 and the liquid hydrogen zone, and hydrogen refueling begins, wherein V max The final filling rate of liquid hydrogen tank 1; The third acquisition module 640 is used to acquire the real-time pressure P of the gas pillow area during the hydrogenation process. i And the real-time filling rate V of liquid hydrogen tank 1 i ; The second control module 650 is used in P i In the case of >P1, control the second three-way valve 7 to connect the air cushion area and the buffer tank 8, where P1 is the minimum pressure required for liquid hydrogen to flow out of the liquid hydrogen tank 1; The third control module 660 is used in V i =V max In this case, control the first three-way valve 6 and the second three-way valve 7 to close, and hydrogenation ends; The fourth acquisition module 710 is used to acquire the start-up indication signal of the fuel cell 9; The fifth acquisition module 720 is used to acquire the real-time liquid level H of the liquid hydrogen tank 1 in response to the start-up indication signal of the fuel cell 9. i Compare H i H1, where H1 is the lower limit of the liquid hydrogen level in liquid hydrogen tank 1; The fourth control module 730 is used in H i In case of >H1, control the first three-way valve 6 to connect the hydrogen supply line 3 and the liquid hydrogen zone, and supply liquid hydrogen to the fuel cell 9 through the hydrogen supply line 3; The sixth acquisition module 740 is used to acquire the real-time pressure P of the gas pillow area during the hydrogen supply process. i And compare P i P1, where P1 is the minimum pressure required for liquid hydrogen to flow out of liquid hydrogen tank 1; The fifth control module 750 is used in P iWhen P ≤ P1, the second three-way valve 7 is controlled to communicate the supercharging pipeline 5 with the air cushion area, and hydrogen is supplied to the air cushion area through the supercharging pipeline 5; The sixth control module 760 is configured to, in response to a fuel cell 9 shutdown instruction signal, control the first three-way valve 6 and the second three-way valve 7 to close, and the hydrogen supply is completed.

[0104] In some embodiments, the control device may further include a first comparison module, a seventh control module and an eighth control module.

[0105] The first comparison module may be configured to compare P i with P2, wherein P2 is the minimum pressure for the on-board liquid hydrogen system to maintain positive pressure, and P2 < P1; P2 is the minimum pressure for the on-board liquid hydrogen system 100 to maintain positive pressure when the liquid hydrogen tank 1 is at the minimum liquid hydrogen level; The seventh control module may be configured to, when P ≥ P2, control the first three-way valve 6 to close, and control the second three-way valve 7 to communicate the air cushion area with the recovery pipeline 4, so as to supply hydrogen to the fuel cell 9 through the recovery pipeline 4; The eighth control module may be configured to, when P i < P2, control the first three-way valve 6 and the second three-way valve 7 to close, and the hydrogen supply is completed.

[0106] Embodiments of the present application further provide a vehicle, including the on-board liquid hydrogen system 100 according to any one of the above technical solutions, and / or the control device for an on-board liquid hydrogen system according to any one of the above technical solutions. It should be noted that, since the embodiments of the present application include the on-board liquid hydrogen system 100 according to any one of the above technical solutions and the control device for an on-board liquid hydrogen system according to any one of the above technical solutions, the embodiments include the technical features and technical effects of the on-board liquid hydrogen system 100 according to any one of the above technical solutions and the control device for an on-board liquid hydrogen system according to any one of the above technical solutions, which will not be repeated herein.

[0107] The control device 10 of the vehicle-mounted liquid hydrogen system 100 in this embodiment can be an electronic device or a component of an electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal or other devices besides a terminal. For example, the electronic device can be a mobile phone, tablet computer, laptop computer, PDA, vehicle-mounted electronic device, mobile internet device (MID), augmented reality (AR) / virtual reality (VR) device, robot, wearable device, ultra-mobile personal computer (UMPC), netbook, or personal digital assistant (PDA), etc. It can also be a server, network attached storage (NAS), personal computer (PC), television (teleVision), ATM, or self-service machine, etc. This embodiment does not specifically limit the specific implementation.

[0108] The control device 10 of the on-board liquid hydrogen system 100 in this embodiment can be a device with an operating system. This operating system can be a Microsoft (Windows) operating system, an Android operating system, an iOS operating system, or other possible operating systems; this embodiment does not specifically limit the specific operating system.

[0109] The control device 10 of the vehicle-mounted liquid hydrogen system 100 provided in this application embodiment can achieve Figures 2 to 5 The various processes implemented in the method implementation examples will not be described again here to avoid repetition.

[0110] In some embodiments, such as Figure 8 As shown, this application embodiment also provides an electronic device 800, including a processor 801, a memory 802, and a computer program stored in the memory 802 and executable on the processor 801. When the program is executed by the processor 801, it implements the various processes of the above-described hydrogen refueling control method and / or hydrogen supply control method embodiments and can achieve the same technical effects. To avoid repetition, it will not be described again here.

[0111] It should be noted that the electronic devices in the embodiments of this application include the aforementioned mobile electronic devices and non-mobile electronic devices.

[0112] This application also provides a non-transitory computer-readable storage medium storing a computer program. When the computer program is executed by a processor, it implements the various processes of the above-described hydrogen refueling control method and / or hydrogen supply control method embodiments and achieves the same technical effect. To avoid repetition, it will not be described again here.

[0113] The processor is the processor in the electronic device described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0114] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the above-described hydrogen refueling control method and / or hydrogen supply control method.

[0115] The processor is the processor in the electronic device described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0116] This application also provides a chip, which includes a processor and a communication interface. The communication interface and the processor are coupled. The processor is used to run programs or instructions to implement the various processes of the above-described hydrogen refueling control method and / or hydrogen supply control method embodiments, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0117] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0118] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0119] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a computer software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods of the various embodiments of this application.

[0120] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

[0121] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0122] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A vehicle-mounted liquid hydrogen system, characterized in that, include: The liquid hydrogen tank has a gas cushion area and a liquid hydrogen area, and is equipped with a liquid level sensor and a first pressure sensor. The liquid hydrogen area is connected to a hydrogen refueling pipeline and a hydrogen supply pipeline through a first three-way valve. The gas cushion area is connected to the hydrogen inlet end of the recovery pipeline and the hydrogen outlet end of the pressurization pipeline through a second three-way valve. The hydrogen outlet end of the hydrogen supply pipeline is connected to a fuel cell, and the hydrogen inlet end of the pressurization pipeline is connected to the liquid hydrogen area. A buffer tank is provided on the hydrogen supply pipeline, and the buffer tank is connected to the hydrogen outlet end of the recovery pipeline; The control device is electrically connected to the liquid level sensor, the first pressure sensor, the first three-way valve, and the second three-way valve. The control device is used to control the operation of the first three-way valve and the second three-way valve according to the liquid level signal of the liquid hydrogen tank and the pressure signal of the gas pillow area. The control device is configured to obtain the initial filling rate of the liquid hydrogen tank based on the liquid level signal of the liquid level sensor after receiving a hydrogen filling instruction signal, and control the first three-way valve to connect the hydrogen filling pipeline and the liquid hydrogen zone when the initial filling rate is less than the final filling rate; during the liquid hydrogen filling process, the control device is also configured to control the second three-way valve to connect the gas pillow zone and the hydrogen inlet end of the recovery pipeline based on the real-time pressure of the gas pillow zone obtained by the first pressure sensor, and when the real-time pressure of the gas pillow zone is greater than the minimum pressure required for liquid hydrogen to flow out of the liquid hydrogen tank, thereby connecting the gas pillow zone with the buffer tank.

2. The on-board liquid hydrogen system according to claim 1, characterized in that, The hydrogen supply pipeline is equipped with a first vaporizer and a first booster on the pipeline located between the buffer tank and the first three-way valve. The first vaporizer and the first booster are electrically connected to the control device. The hydrogen outlet of the recovery pipeline is connected to the hydrogen inlet of the first vaporizer.

3. The on-board liquid hydrogen system according to claim 1, characterized in that, The pressurization pipeline is equipped with a second vaporizer and a second booster. The second vaporizer and the second booster are electrically connected to the control device, which controls the operation of the second booster based on the liquid level signal and the pressure signal.

4. The on-board liquid hydrogen system according to any one of claims 1-3, characterized in that, A safety valve is connected to the pipeline between the air cushion area and the second three-way valve and / or the pipeline between the hydrogen outlet end of the buffer tank and the hydrogen inlet end of the fuel cell.

5. The on-board liquid hydrogen system according to any one of claims 1-3, characterized in that, Mechanical shut-off valves are provided on the hydrogen supply pipeline, the recovery pipeline, and the pressurization pipeline, and the mechanical shut-off valves are configured to be in the open state.

6. A hydrogen refueling control method for an on-board liquid hydrogen system as described in any one of claims 1-5, characterized in that, include: Obtain hydrogenation indication signal; In response to the hydrogenation indication signal, the liquid level H of the liquid hydrogen tank is obtained, and the initial filling rate V0 of the liquid hydrogen tank is obtained based on H. In V0 <V max In this case, the first three-way valve is controlled to connect the hydrogen refueling pipeline and the liquid hydrogen zone to start hydrogen refueling, wherein V max The final filling rate of the liquid hydrogen tank; During the hydrogenation process, the real-time pressure P of the gas pillow area is obtained. i and the real-time filling rate V of the liquid hydrogen tank i ; In P i In the case of P1, the second three-way valve is controlled to connect the air cushion area and the buffer tank, wherein P1 is the minimum pressure required for liquid hydrogen to flow out of the liquid hydrogen tank; In V i =V max In this case, the first three-way valve and the second three-way valve are closed, and hydrogenation ends.

7. A method for controlling the hydrogen supply of an on-board liquid hydrogen system as described in any one of claims 1-5, characterized in that, include: Obtain the fuel cell start-up indication signal; In response to the fuel cell start-up indication signal, the real-time liquid level H of the liquid hydrogen tank is acquired. i Compare H i H1, where H1 is the lower limit of the liquid hydrogen level in the liquid hydrogen tank; In H i In case H1, the first three-way valve is controlled to connect the hydrogen supply pipeline and the liquid hydrogen zone, and liquid hydrogen is supplied to the fuel cell through the hydrogen supply pipeline. During the hydrogen supply process, the real-time pressure P of the gas pillow area is obtained. i And compare P i P1, where P1 is the minimum pressure required for liquid hydrogen to flow out of the liquid hydrogen tank; In P i When P1 is less than or equal to 1, the second three-way valve is controlled to connect the pressurization pipeline and the gas pillow area, and hydrogen is supplied to the gas pillow area through the pressurization pipeline. In response to the fuel cell shutdown indication signal, the first three-way valve and the second three-way valve are controlled to close, and the hydrogen supply ends.

8. The control method for the on-board liquid hydrogen system according to claim 7, characterized in that, When H ≤ H1, the hydrogen supply control method further includes: Compare P i P2, where P2 is the minimum pressure required to maintain a positive pressure in the onboard liquid hydrogen system, and P2 <P1; When P≥P2, the first three-way valve is closed, and the second three-way valve is connected to the gas pillow area and the recovery pipeline, and hydrogen is supplied to the fuel cell through the recovery pipeline; In P i <In the case of P2, control the first three-way valve and the second three-way valve to close, and hydrogen supply is completed.

9. A control device for an on-board liquid hydrogen system, characterized in that, The control device includes a first acquisition module, a second acquisition module, a third acquisition module, a first control module, a second control module, and a third control module; and / or, the control device includes a fourth acquisition module, a fifth acquisition module, a sixth acquisition module, a fourth control module, a fifth control module, and a sixth control module; wherein, The first acquisition module is used to acquire the hydrogenation indication signal; The second acquisition module is used to acquire the liquid level H of the liquid hydrogen tank in response to the hydrogen addition indication signal, and to acquire the initial filling rate V0 of the liquid hydrogen tank based on H. The first control module is used in V0 <V max In this case, the first three-way valve is controlled to connect the hydrogen refueling pipeline and the liquid hydrogen zone to start hydrogen refueling, wherein V max The final fill rate of the liquid hydrogen tank; The third acquisition module is used to acquire the real-time pressure P of the gas pillow area during the hydrogenation process. i And the real-time filling rate V of the liquid hydrogen tank i ; The second control module is used in P i In the case of >P1, control the second three-way valve to connect the air cushion area and the buffer tank, where P1 is the minimum pressure required for liquid hydrogen to flow out of the liquid hydrogen tank; The third control module is used in V i =V max In this case, control the first three-way valve and the second three-way valve to close, and hydrogenation ends; The fourth acquisition module is used to acquire the fuel cell start-up indication signal; The fifth acquisition module is used to acquire the real-time liquid level H of the liquid hydrogen tank in response to the fuel cell start-up indication signal. i Compare H i H1, where H1 is the lower limit of the liquid hydrogen level in the liquid hydrogen tank; The fourth control module is used in H i In case H1, the first three-way valve is controlled to connect the hydrogen supply pipeline and the liquid hydrogen zone, and liquid hydrogen is supplied to the fuel cell through the hydrogen supply pipeline. The sixth acquisition module is used to acquire the real-time pressure P of the gas pillow area during the hydrogen supply process. i And compare P i P1, where P1 is the minimum pressure required for liquid hydrogen to flow out of the liquid hydrogen tank; The fifth control module is used in P i When P1 is less than or equal to 1, control the second three-way valve to connect the pressurization pipeline and the gas pillow area, and supply hydrogen to the gas pillow area through the pressurization pipeline; The sixth control module is used to control the first three-way valve and the second three-way valve to close in response to the fuel cell shutdown indication signal, thereby ending the hydrogen supply.

10. A vehicle, characterized in that, Includes the vehicle-mounted liquid hydrogen system as described in any one of claims 1-5, and / or the control device for the vehicle-mounted liquid hydrogen system as described in claim 9.

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