Liquid hydrogen system control method, electronic device and readable storage medium

Abstract

The present invention discloses a control method, electronic device, and readable storage medium for a liquid hydrogen system. The liquid hydrogen system includes: a liquid hydrogen storage element, an evaporation pipe, a buffer element, and a pressurization pipe. The liquid hydrogen storage element is used to store liquid hydrogen. One end of the evaporation pipe is connected to the liquid hydrogen storage element, and the other end of the evaporation pipe is connected to the buffer element to supply gaseous hydrogen to the buffer element. The buffer element is used to connect to a fuel cell to supply gaseous hydrogen to the fuel cell. The pressurization pipe has a pressurization inlet and a pressurization outlet. The pressurization inlet is connected to the buffer element, and the pressurization outlet is connected to the liquid hydrogen storage element to guide the gaseous hydrogen into the liquid hydrogen storage element. The control method includes: comparing a first pressure at the hydrogen inlet on the fuel cell with a second pressure within the liquid hydrogen storage element; if the second pressure is less than the first pressure, controlling the pressurization pipe to connect to the liquid hydrogen storage element. The present invention solves the problem of insufficient pressure within the liquid hydrogen storage element by providing a pressurization pipe between the liquid hydrogen storage element and the buffer element.

Description

Technical Field

[0001] The present invention relates to the field of liquid hydrogen control technology, and in particular to a control method, electronic equipment, and readable storage medium for a liquid hydrogen system. Background Art

[0002] In related technologies, some fuel cell vehicles use liquid hydrogen storage, storing liquid hydrogen in a tank. The tank is connected to the fuel cell to supply hydrogen to the fuel cell. However, in related technologies, the pressure in the tank may be insufficient to meet the requirements of the fuel cell. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a control method for a liquid hydrogen system, which solves the problem of insufficient pressure in a liquid hydrogen storage unit.

[0004] According to a control method for a liquid hydrogen system according to an embodiment of the present invention, the liquid hydrogen system includes: a liquid hydrogen storage element, an evaporation pipe, a buffer element and a boost pipe, the liquid hydrogen storage element is used to store liquid hydrogen, one end of the evaporation pipe is connected to the liquid hydrogen storage element, and the other end of the evaporation pipe is connected to the buffer element to supply gaseous hydrogen to the buffer element, the buffer element is used to connect to a fuel cell to supply gaseous hydrogen to the fuel cell, the boost pipe has a boost inlet and a boost outlet, the boost inlet is connected to the buffer element, and the boost outlet is connected to the liquid hydrogen storage element to guide the gaseous hydrogen into the liquid hydrogen storage element; the control method includes: comparing a first pressure at the hydrogen inlet on the fuel cell with a second pressure in the liquid hydrogen storage element; if the second pressure is less than the first pressure, controlling the boost pipe to connect to the liquid hydrogen storage element.

[0005] According to the control method of the liquid hydrogen system of an embodiment of the present invention, a boosting pipe is provided between the liquid hydrogen storage element and the buffer element. The boosting pipe guides the gaseous hydrogen in the buffer element into the liquid hydrogen storage element, and the gaseous hydrogen is used to increase the pressure in the liquid hydrogen storage element. The overall structure is simple and easy to implement, thereby solving the problem of insufficient pressure in the liquid hydrogen storage element.

[0006] In some embodiments, a control valve is further provided on the boost pipe, and if the second pressure is less than the first pressure, controlling the boost pipe to connect to the liquid hydrogen storage element includes: if the second pressure is less than the first pressure, controlling the control valve to open.

[0007] In some embodiments, the control valve is configured as a first proportional valve, and if the second pressure is less than the first pressure, controlling the control valve to open includes: controlling the opening of the first proportional valve according to the difference between the first pressure and the second pressure.

[0008] In some embodiments, a first switch valve is provided on the evaporation pipe, and the buffer component is provided with a first pressure detection component. The control method includes: if the pressure value detected by the first pressure detection component is greater than a first set value, controlling the first switch valve to close, wherein the first set value is P1, 2.5MPa≤P1≤3.5MPa.

[0009] In some embodiments, the boost pipeline is provided with a hydrogen storage element and a shut-off valve, the hydrogen storage element is used to store the gaseous hydrogen, and the hydrogen storage element is provided with a second pressure detection element. The control method further includes: if the pressure value detected by the second pressure detection element is less than a second set value, controlling the shut-off valve to open, wherein the second set value is P2, 2.5MPa≤P2≤3.5MPa.

[0010] In some embodiments, the liquid hydrogen storage element is provided with a third pressure detection element, the evaporation pipe is provided with a first switch valve, the buffer element is provided with a first pressure detection element, the boost pipe is provided with a hydrogen storage element and a shut-off valve, and the hydrogen storage element is used to store the gaseous hydrogen. The control method includes: if the pressure value detected by the third pressure detection element is greater than a third set value, controlling the first switch valve to open, wherein the third set value is P3, and the 1MPa≤P3≤1.6MPa; if the pressure value detected by the first pressure detection element is greater than a fourth set value, controlling the shut-off valve to open, wherein the fourth set value is P4, and the 2.5MPa≤P4≤3.5MPa.

[0011] In some embodiments, a water bath evaporator is provided on the evaporation pipe, and the water bath evaporator is connected to a medium supply device through a medium pipe, and the medium supply device supplies heat exchange medium to the water bath evaporator. A first heating element is provided on the medium pipe, and the control method includes: issuing a control instruction including a heating target temperature to the first heating element, controlling the first heating element to heat the heat exchange medium according to the heating target temperature; calculating the liquid hydrogen flow rate that needs to be vaporized according to the ambient temperature and the hydrogen flow rate; and calculating the heating power and the heating target temperature according to the liquid hydrogen flow rate that needs to be vaporized.

[0012] In some embodiments, there are multiple evaporation pipes, and the multiple evaporation pipes are arranged in parallel. The multiple evaporation pipes are respectively provided with a first switch valve. The control method includes: controlling any one or more of the multiple first switch valves to open to connect the liquid hydrogen storage component and the buffer component.

[0013] An electronic device according to an embodiment of the present invention includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the steps of the above-mentioned method for controlling the liquid hydrogen system are implemented.

[0014] According to an electronic device according to an embodiment of the present invention, a pressurizing pipe is provided between the liquid hydrogen storage element and the buffer element. The pressurizing pipe guides the gaseous hydrogen in the buffer element into the liquid hydrogen storage element, and the gaseous hydrogen is used to increase the pressure in the liquid hydrogen storage element. The overall structure is simple and easy to implement, thereby solving the problem of insufficient pressure in the liquid hydrogen storage element.

[0015] According to an embodiment of the present invention, a readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the above-mentioned method for controlling the liquid hydrogen system.

[0016] According to the readable storage medium of an embodiment of the present invention, a pressurizing pipe is provided between the liquid hydrogen storage element and the buffer element. The pressurizing pipe guides the gaseous hydrogen in the buffer element into the liquid hydrogen storage element, and the gaseous hydrogen is used to increase the pressure in the liquid hydrogen storage element. The overall structure is simple and easy to implement, thereby solving the problem of insufficient pressure in the liquid hydrogen storage element.

[0017] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0019] Figure 1 is a schematic diagram of a liquid hydrogen system for a vehicle in an embodiment of the present invention;

[0020] Figure 2 The flow chart of the control method in the embodiment of the present invention is as follows: Figure 1 ;

[0021] Figure 3 The flow chart of the control method in the embodiment of the present invention is as follows: Figure 2 ;

[0022] Figure 4 The flow chart of the control method in the embodiment of the present invention is as follows: Figure 3 ;

[0023] Figure 5 The flow chart of the control method in the embodiment of the present invention is as follows: Figure 4 ;

[0024] Figure 6 The flow chart of the control method in the embodiment of the present invention is as follows Figure 5 ;

[0025] Figure 7 The flow chart of the control method in the embodiment of the present invention is as follows Figure 6 ;

[0026] Figure 8The flow chart of the control method in the embodiment of the present invention is as follows Figure 7 .

[0027] Reference numerals:

[0028] 100. Liquid hydrogen system of vehicle;

[0029] 10. Liquid hydrogen storage element; 11. Third pressure detection element; 12. Third safety valve;

[0030] 20. Evaporation pipe; 21. First evaporator; 221. First water-bath evaporator; 222. Second water-bath evaporator; 23. Medium supply device; 231. Heat dissipation pipe; 2311. Third temperature detection element; 2312. Fourth temperature detection element; 2313. Expansion water tank; 232. Heat dissipation element; 233. Medium pipe; 234. Second proportional valve; 235. Drive pump; 236. Second heating element; 24. First heating element; 25. First on / off valve; 26. Booster pump; 27. Second temperature detection element; 28. First one-way valve;

[0031] 30. Buffer; 31. First pressure detection element; 32. First safety valve; 40. Pressurization pipeline; 43. Hydrogen storage element; 431. Second pressure detection element; 432. Second safety valve; 441. First stop valve; 442. Second stop valve; 45. Pressure stabilizing valve; 46. First proportional valve; 47. First temperature detection element;

[0032] 50. Heat exchange element; 51. First pipeline; 52. Fifth temperature detector; 53. Second on-off valve; 54. Third proportional valve; 55. Fourth pressure detector; 551. Ejector; 56. Second pipeline; 57. Fourth proportional valve; 58. Second one-way valve; 591. Third on-off valve; 592. Fourth on-off valve;

[0033] 200. Fuel cell. DETAILED DESCRIPTION

[0034] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0036] In addition, features defined as "first" or "second" may explicitly or implicitly include one or more such features, and are used to distinguish and describe features, without any distinction in order or importance.

[0037] In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0038] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0039] The liquid hydrogen system 100 for a vehicle according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0040] Reference Figure 1 According to an embodiment of the present invention, a liquid hydrogen system 100 for a vehicle includes a liquid hydrogen storage element 10 , an evaporation pipe 20 , a buffer element 30 and a pressurization pipe 40 .

[0041] The liquid hydrogen storage element 10 is used to store liquid hydrogen. An evaporation pipe 20 has one end connected to the liquid hydrogen storage element 10. The other end of the evaporation pipe 20 is connected to a buffer element 30 to supply gaseous hydrogen to the buffer element 30. The buffer element 30 is connected to the fuel cell 200 to supply gaseous hydrogen to the fuel cell 200. A boost pipe 40 has a boost inlet and a boost outlet. The boost inlet is connected to the buffer element 30, and the boost outlet is connected to the liquid hydrogen storage element 10 to guide the gaseous hydrogen into the liquid hydrogen storage element.

[0042] Among them, the evaporation pipe 20 is arranged between the liquid hydrogen storage component 10 and the buffer component 30. The liquid hydrogen in the liquid hydrogen storage component 10 evaporates and turns into gaseous hydrogen when passing through the evaporation pipe 20. The gaseous hydrogen flows into the buffer component 30. The buffer component 30 provides a certain buffering effect and can improve pressure fluctuations. The gaseous hydrogen in the buffer component 30 can be guided to the fuel cell 200 to provide gaseous hydrogen for the operation of the fuel cell 200.

[0043] In related technologies, some fuel cell vehicles use liquid hydrogen storage, storing liquid hydrogen in a tank. The tank is connected to the fuel cell to supply hydrogen to the fuel cell. However, in related technologies, the pressure in the tank may be insufficient to meet the requirements of the fuel cell.

[0044] In an embodiment of the present invention, a boost pipe 40 is added. The boost pipe 40 is arranged between the buffer component 30 and the liquid hydrogen storage component 10 to guide the gaseous hydrogen in the buffer component 30 into the liquid hydrogen storage component 10, thereby increasing the pressure in the liquid hydrogen storage component 10 and meeting the requirements of the fuel cell 200.

[0045] Among them, the boost inlet of the boost pipe 40 is connected to the buffer 30, and the gaseous hydrogen in the buffer 30 flows to the boost inlet. The boost outlet of the boost pipe 40 is connected to the liquid hydrogen storage component 10, and the gaseous hydrogen in the boost pipe 40 flows to the liquid hydrogen storage component 10, thereby increasing the pressure in the liquid hydrogen storage component 10.

[0046] According to the liquid hydrogen system 100 of a vehicle according to an embodiment of the present invention, a boosting pipe 40 is provided between the liquid hydrogen storage element 10 and the buffer element 30. The boosting pipe 40 guides the gaseous hydrogen in the buffer element 30 into the liquid hydrogen storage element 10, and uses the gaseous hydrogen to increase the pressure in the liquid hydrogen storage element 10. The overall structure is simple and easy to implement, thereby solving the problem of insufficient pressure in the liquid hydrogen storage element 10.

[0047] Reference Figure 1 In some embodiments, the boost pipe 40 is provided with a hydrogen storage element 43 and a shut-off valve. The hydrogen storage element 43 is used to store gaseous hydrogen. The shut-off valve is provided upstream and / or downstream of the hydrogen storage element 43 to control the flow of gaseous hydrogen.

[0048] Among them, the stop valve can be set upstream of the hydrogen storage element 43, that is, the gaseous hydrogen flowing from the buffer element 30 to the liquid hydrogen storage element 10 first flows through the stop valve and then flows to the hydrogen storage element 43; or, the stop valve can also be set downstream of the hydrogen storage element 43, that is, the gaseous hydrogen flowing from the buffer element 30 to the liquid hydrogen storage element 10 first flows through the hydrogen storage element 43 and then flows through the stop valve; or, stop valves are set both upstream and downstream of the hydrogen storage element 43, for example, the stop valve includes a first stop valve 441 and a second stop valve 442, the first stop valve 441 is set upstream of the hydrogen storage element 43, and the second stop valve 442 is set downstream of the hydrogen storage element 43.

[0049] In the above scheme, a hydrogen storage element 43 is provided on the boost pipe 40, and gaseous hydrogen is stored in the hydrogen storage element 43. The hydrogen storage element 43 provides a certain buffering effect. At the same time, the hydrogen storage element 43 can reserve a certain volume of hydrogen to serve as a backup plan. At the same time, it can be understood that liquid hydrogen will also evaporate when left stationary. The hydrogen storage element 43 and the buffer element 30 can both be used to recover the evaporated gaseous hydrogen, thereby improving the utilization rate.

[0050] Specifically, in related art, the static evaporation rate of liquid hydrogen at room temperature is as high as 4.5%. Based on current long-distance trunk line demand, a vehicle needs to carry more than 80kg of liquid hydrogen. Based on a 3% static evaporation rate at room temperature, a stationary vehicle evaporates approximately 3.4kg of liquid hydrogen per day. If the mass-produced liquid hydrogen price is 50 yuan / kg, this translates to a direct loss of approximately 175 yuan per day. The present invention reduces this loss by providing a buffer 30 and a hydrogen storage element 43 to collect evaporated hydrogen.

[0051] Reference Figure 1 In some embodiments, the boost pipeline 40 is further provided with a pressure-stabilizing valve 45, which is located upstream of the hydrogen storage element 43. The boost pipeline 40 is further provided with a first proportional valve 46, which is located downstream of the hydrogen storage element 43, to adjust the amount of gaseous hydrogen supplied by the hydrogen storage element 43 to the liquid hydrogen storage element 10.

[0052] The gaseous hydrogen flowing from the buffer element 30 to the liquid hydrogen storage element 10 first flows through the pressure-stabilizing valve 45 before flowing to the hydrogen storage element 43. For example, the pressure-stabilizing valve 45 comprises a housing with an adjusting spring and a valve core. When the pressure falls below a set value, the adjusting spring pushes the valve core, opening the valve port and allowing more fluid to flow, thereby increasing the pressure. When the pressure reaches the set value, the spring compresses, closing or partially closing the valve core, reducing the amount of fluid flowing through and stabilizing the pressure.

[0053] The boost pipe 40 is also equipped with a first proportional valve 46. This valve adjusts the amount of gaseous hydrogen supplied from the hydrogen storage element 43 to the liquid hydrogen storage element 10, automatically adjusting its opening to control pressure. For example, the first proportional valve 46 comprises a solenoid coil, a valve core, a spring, and a position sensor. Applying different currents through the solenoid coil drives the valve core to move within the valve body, thereby changing the valve opening and regulating the flow and pressure of the fluid. The position sensor feeds the valve core's position back to the controller, implementing closed-loop control and ensuring precise positioning of the valve core.

[0054] In the above solution, the pressure is increased to a desired level by providing a pressure-stabilizing valve 45 , and a first proportional valve 46 is provided to automatically control the pressure, and the overall structure is simple.

[0055] Reference Figure 1 In some embodiments, a first evaporator 21 and a second evaporator are provided on the evaporation pipe 20 , and the first evaporator 21 and the second evaporator are provided in sequence.

[0056] The first and second evaporators 21 and 21 process the liquid hydrogen sequentially, evaporating it into gaseous hydrogen. For example, the evaporators operate based on heat exchange and phase change. The liquid absorbs heat in the evaporator, and once it reaches its boiling point, it begins to evaporate and transform into a gas. It is understood that the liquid hydrogen may be mixed with gaseous hydrogen after passing through the first evaporator 21. In other words, the second evaporator acts on both liquid and gaseous hydrogen simultaneously.

[0057] In the above solution, by sequentially arranging the first evaporator 21 and the second evaporator, the liquid hydrogen is evaporated successively, and the secondary evaporation improves the evaporation effect.

[0058] Specifically, the evaporator may be a tube evaporator, a plate evaporator, or a spray evaporator.

[0059] Specifically, the first evaporator 21 can be configured as a water bath evaporator or a steam bath evaporator; the second evaporator can be configured as a water bath evaporator or a steam bath evaporator.

[0060] Reference Figure 1 In some embodiments, the second evaporator is constructed as a water bath evaporator, which is connected to a medium supply device 23, which supplies heat exchange medium to the water bath evaporator; wherein a first heating element 24 is provided between the medium supply device 23 and the water bath evaporator to heat the heat exchange medium.

[0061] The medium supply device 23 supplies heat exchange medium to the water bath evaporator, and the heat exchange medium exchanges heat with the liquid hydrogen in the water bath evaporator, thereby evaporating the liquid hydrogen.

[0062] In the above solution, the first heating element 24 is provided to heat the heat exchange medium. The first heating element 24 is used to increase the temperature of the heat exchange medium, thereby improving the evaporation effect of the water bath evaporator on liquid hydrogen and increasing the flow rate of gaseous hydrogen.

[0063] Specifically, the heat exchange medium may be water or other media.

[0064] Reference Figure 1 In some embodiments, the medium supply device 23 includes: a heat dissipation pipe 231 and a heat dissipation member 232 .

[0065] The heat dissipation pipe 231 is connected to the fuel cell 200 at both ends. A heat dissipation element 232 is provided on the heat dissipation pipe 231 to dissipate heat from the heat exchange medium discharged from the fuel cell 200. A medium pipe 233 is provided between the heat dissipation element 232 and the water bath evaporator to guide the heat exchange medium discharged from the heat dissipation element 232 to the water bath evaporator.

[0066] The heat dissipating element 232 on the heat dissipating pipe 231 dissipates heat for the heat exchange medium discharged from the fuel cell 200 , and the medium pipe 233 guides the heat exchange medium discharged from the fuel cell 200 to the water bath evaporator, where the heat exchange medium discharged from the fuel cell 200 is used to evaporate the liquid hydrogen.

[0067] In the above solution, the medium pipe 233 is provided to guide the heat exchange medium discharged from the fuel cell 200 to evaporate the liquid hydrogen, thereby making full use of each structure, improving the utilization rate, and reducing the total energy consumption.

[0068] Reference Figure 1 In some embodiments, there are multiple evaporation pipes 20, and the multiple evaporation pipes 20 are arranged in parallel.

[0069] Among them, multiple evaporation pipes 20 are connected in parallel, and multiple evaporation pipes 20 can work simultaneously, which increases the evaporation amount and thus increases the flow rate of gaseous hydrogen. Multiple evaporation pipes 20 can also be partially operated to adapt to different working conditions.

[0070] In the above solution, a plurality of evaporation pipes 20 connected in parallel are provided, and the liquid hydrogen is evaporated by using the plurality of evaporation pipes 20 , thereby increasing the flow rate of the gaseous hydrogen.

[0071] Reference Figure 1 In some embodiments, multiple water bath evaporators are respectively provided on the multiple evaporation pipes 20, and the multiple water bath evaporators include a first water bath evaporator 221 and a second water bath evaporator 222. The first heating element 24 is provided upstream of the first water bath evaporator 221 and the second water bath evaporator 222 to supply heat exchange medium to the first water bath evaporator 221 and the second water bath evaporator 222 respectively.

[0072] Among them, water bath evaporators are correspondingly provided on the evaporation pipes 20. For example, a first water bath evaporator 221 is provided on one of the evaporation pipes 20, and a second water bath evaporator 222 is provided on the other evaporation pipe 20. The first heating element 24 is provided upstream of the first water bath evaporator 221 and the second water bath evaporator 222. The first water bath evaporator 221 and the second water bath evaporator 222 share the same first heating element 24.

[0073] In the above solution, by arranging multiple water bath evaporators to share the same first heating element 24, the utilization rate is improved, the structure is simplified, and the number of parts is reduced.

[0074] Specifically, the first heating element 24 may be a positive temperature coefficient (PTC) material. The resistance of the PTC material increases significantly with increasing temperature, thereby regulating and limiting the current.

[0075] Reference Figure 1 In some embodiments, the first evaporator 21 is configured as a steam bath evaporator, which is provided with a heat exchange portion in contact with the atmospheric environment.

[0076] The steam bath evaporator has a heat exchange portion, which is in direct contact with the atmospheric environment, and the liquid hydrogen directly exchanges heat with the atmospheric environment.

[0077] In the above solution, a steam bath evaporator is used to evaporate liquid hydrogen, which saves energy. Moreover, when the vehicle is stationary, the steam bath evaporator can still evaporate liquid hydrogen, which helps to recover liquid hydrogen.

[0078] A vehicle according to an embodiment of the present invention includes the above-mentioned liquid hydrogen system.

[0079] In the vehicle according to an embodiment of the present invention, a pressurizing pipe 40 is provided between the liquid hydrogen storage element 10 and the buffer element 30. The pressurizing pipe 40 guides the gaseous hydrogen in the buffer element 30 into the liquid hydrogen storage element 10, and utilizes the gaseous hydrogen to increase the pressure in the liquid hydrogen storage element 10. The overall structure is simple and easy to implement, thereby solving the problem of insufficient pressure in the liquid hydrogen storage element 10.

[0080] Reference Figure 1 、 Figure 2According to a control method for a liquid hydrogen system according to an embodiment of the present invention, the liquid hydrogen system includes: a liquid hydrogen storage element 10, an evaporation pipe 20, a buffer element 30 and a boost pipe 40. The liquid hydrogen storage element 10 is used to store liquid hydrogen. One end of the evaporation pipe 20 is connected to the liquid hydrogen storage element 10, and the other end of the evaporation pipe 20 is connected to the buffer element 30 to supply gaseous hydrogen to the buffer element 30. The buffer element 30 is used to connect to the fuel cell 200 to supply gaseous hydrogen to the fuel cell 200. The boost pipe 40 has a boost inlet and a boost outlet. The boost inlet is connected to the buffer element 30, and the boost outlet is connected to the liquid hydrogen storage element 10 to guide the gaseous hydrogen into the liquid hydrogen storage element.

[0081] Among them, the evaporation pipe 20 is arranged between the liquid hydrogen storage component 10 and the buffer component 30. The liquid hydrogen in the liquid hydrogen storage component 10 evaporates and turns into gaseous hydrogen when passing through the evaporation pipe 20. The gaseous hydrogen flows into the buffer component 30. The buffer component 30 provides a certain buffering effect and can improve pressure fluctuations. The gaseous hydrogen in the buffer component 30 can be guided to the fuel cell 200 to provide gaseous hydrogen for the operation of the fuel cell 200.

[0082] Control methods include:

[0083] S2: comparing a first pressure at a hydrogen inlet of the fuel cell with a second pressure in the liquid hydrogen storage element.

[0084] The fuel cell 200 has a hydrogen inlet through which gaseous hydrogen enters the fuel cell 200. The first pressure reflects the pressure of the gaseous hydrogen supplied to the fuel cell 200. The second pressure reflects the pressure inside the liquid storage element.

[0085] S3: If the second pressure is lower than the first pressure, the boosting pipeline is controlled to connect to the liquid hydrogen storage element.

[0086] In related technologies, some fuel cell vehicles use liquid hydrogen storage, storing liquid hydrogen in a tank. The tank is connected to the fuel cell to supply hydrogen to the fuel cell. However, in related technologies, the pressure in the tank may be insufficient to meet the requirements of the fuel cell.

[0087] In an embodiment of the present invention, a boost pipe 40 is added. The boost pipe 40 is arranged between the buffer component 30 and the liquid hydrogen storage component 10 to guide the gaseous hydrogen in the buffer component 30 into the liquid hydrogen storage component 10, thereby increasing the pressure in the liquid hydrogen storage component 10 and meeting the requirements of the fuel cell 200.

[0088] For example, the second pressure increases to be greater than the first pressure, and the pressure between the second pressure and the first pressure allows the liquid hydrogen to be smoothly discharged from the liquid hydrogen storage element 10 .

[0089] Among them, the boost inlet of the boost pipe 40 is connected to the buffer 30, and the gaseous hydrogen in the buffer 30 flows to the boost inlet. The boost outlet of the boost pipe 40 is connected to the liquid hydrogen storage component 10, and the gaseous hydrogen in the boost pipe 40 flows to the liquid hydrogen storage component 10, thereby increasing the pressure in the liquid hydrogen storage component 10.

[0090] According to the control method of an embodiment of the present invention, a pressurizing pipe 40 is provided between the liquid hydrogen storage element 10 and the buffer element 30. The pressurizing pipe 40 guides the gaseous hydrogen in the buffer element 30 into the liquid hydrogen storage element 10, and the gaseous hydrogen is used to increase the pressure in the liquid hydrogen storage element 10. The overall structure is simple and easy to implement, thereby solving the problem of insufficient pressure in the liquid hydrogen storage element 10.

[0091] Reference Figure 1 、 Figure 3 In some embodiments, the boost pipe 40 is further provided with a control valve. If the second pressure is less than the first pressure, controlling the boost pipe to connect to the liquid hydrogen storage element includes:

[0092] S31: If the second pressure is lower than the first pressure, the control valve is controlled to open.

[0093] The control valve controls the on-off of the boost pipe 40. By setting the control valve to control the on-off of the boost pipe 40, subsequent control is facilitated. For example, the control valve is a proportional valve or a switch valve.

[0094] Reference Figure 1 、 Figure 4 In some embodiments, the control valve is configured as a first proportional valve 46 , and if the second pressure is less than the first pressure, controlling the control valve to open includes:

[0095] S311: Controlling the opening of the first proportional valve according to the difference between the first pressure and the second pressure.

[0096] Specifically, the control valve is configured as a first proportional valve 46, which automatically controls the pressurization effect of the pressurization pipeline 40. For example, if the difference between the first pressure and the second pressure is large, the opening of the first proportional valve 46 is large; if the difference between the first pressure and the second pressure is small, the opening of the first proportional valve 46 is small.

[0097] It should be noted that the control valve is constructed as a first proportional valve 46 . When the first pressure is lower than the second pressure, the liquid hydrogen storage element 10 does not need to be pressurized, and the first proportional valve 46 is closed.

[0098] Reference Figure 1 、 Figure 5 In some embodiments, the evaporation pipe 20 is provided with a first switch valve 25, and the buffer 30 is provided with a first pressure detection element 31. The control method includes:

[0099] S4: If the pressure value detected by the first pressure detection component is greater than the first set value, the first switch valve is controlled to close.

[0100] The first set value is a preset value. The first pressure detection component 31 detects the pressure in the buffer component 30 and controls the on / off state of the evaporation pipe 20 according to the preset value.

[0101] In the above solution, when the pressure in the buffer 30 is greater than the first set value, the evaporation pipe 20 stops supplying gaseous hydrogen to the buffer 30 to avoid damage to the buffer 30 and protect the buffer 30.

[0102] In some specific embodiments, the first set value is P1, 2.5 MPa≤P1≤3.5 MPa.

[0103] For example, the first set value P1 is 2.5 MPa; or, the first set value P1 is 2.6 MPa; or, the first set value P1 is 2.7 MPa; or, the first set value P1 is 2.8 MPa; or, the first set value P1 is 2.9 MPa; or, the first set value P1 is 3.0 MPa; or, the first set value P1 is 3.1 MPa; or, the first set value P1 is 3.2 MPa; or, the first set value P1 is 3.3 MPa; or, the first set value P1 is 3.4 MPa; or, the first set value P1 is 3.5 MPa.

[0104] Reference Figure 1 、 Figure 5 In some specific embodiments, a first safety valve 32 is further provided on the buffer 30. The first safety valve 32 is constructed as a normally closed valve. When the pressure in the buffer 30 is greater than 3.5 MPa, the first safety valve 32 is controlled to open, thereby further improving safety.

[0105] In some embodiments, the hydrogen storage element 43 is provided with a second safety valve 432 to improve safety.

[0106] In some specific embodiments, a first temperature detecting member 47 is provided on the boost pipe 40 to detect the temperature.

[0107] In some embodiments, a third safety valve 12 is provided on the liquid hydrogen storage element 10 to improve safety.

[0108] In some specific embodiments, a second temperature detecting member 27 is provided on the evaporation pipe 20 to detect the temperature.

[0109] Furthermore, a first one-way valve 28 is provided on the evaporation pipe 20 .

[0110] In some embodiments, the boost pipe 40 is provided with a hydrogen storage element 43 and a shut-off valve. The hydrogen storage element 43 is used to store gaseous hydrogen. The hydrogen storage element 43 is provided with a second pressure detection element 431. The control method further includes:

[0111] S5: If the pressure value detected by the second pressure detection component is less than the second set value, the stop valve is controlled to open.

[0112] The second set value is a preset value, and the second pressure detection component 431 detects the pressure in the hydrogen storage component 43 and controls the on-off of the boost pipe 40 according to the preset value.

[0113] In the above solution, under the premise that the pressure in the hydrogen storage element 43 is less than the second set value, the gaseous hydrogen discharged from the buffer element 30 is collected in the hydrogen storage element 43, thereby avoiding waste.

[0114] Among them, the stop valve can be set upstream of the hydrogen storage element 43, that is, the gaseous hydrogen flowing from the buffer element 30 to the liquid hydrogen storage element 10 first flows through the stop valve and then flows to the hydrogen storage element 43; or, the stop valve can also be set downstream of the hydrogen storage element 43, that is, the gaseous hydrogen flowing from the buffer element 30 to the liquid hydrogen storage element 10 first flows through the hydrogen storage element 43 and then flows through the stop valve; or, stop valves are set both upstream and downstream of the hydrogen storage element 43, for example, the stop valve includes a first stop valve 441 and a second stop valve 442, the first stop valve 441 is set upstream of the hydrogen storage element 43, and the second stop valve 442 is set downstream of the hydrogen storage element 43.

[0115] In the above scheme, a hydrogen storage element 43 is provided on the boost pipe 40, and gaseous hydrogen is stored in the hydrogen storage element 43. The hydrogen storage element 43 provides a certain buffering effect. At the same time, the hydrogen storage element 43 can reserve a certain volume of hydrogen to serve as a backup plan. At the same time, it can be understood that liquid hydrogen will also evaporate when left stationary. The hydrogen storage element 43 and the buffer element 30 can both be used to recover the evaporated gaseous hydrogen, thereby improving the utilization rate.

[0116] Specifically, in related art, the static evaporation rate of liquid hydrogen at room temperature is as high as 4.5%. Based on current long-distance trunk line demand, a vehicle needs to carry more than 80kg of liquid hydrogen. Based on a 3% static evaporation rate at room temperature, a stationary vehicle evaporates approximately 3.4kg of liquid hydrogen per day. If the mass-produced liquid hydrogen price is 50 yuan / kg, this translates to a direct loss of approximately 175 yuan per day. The present invention reduces this loss by providing a buffer 30 and a hydrogen storage element 43 to collect evaporated hydrogen.

[0117] In some specific embodiments, the second set value is P2, 2.5 MPa≤P2≤3.5 MPa.

[0118] For example, the second set value P2 is 2.5 MPa; or, the second set value P2 is 2.6 MPa; or, the second set value P2 is 2.7 MPa; or, the second set value P2 is 2.8 MPa; or, the second set value P2 is 2.9 MPa; or, the second set value P2 is 3.0 MPa; or, the second set value P2 is 3.1 MPa; or, the second set value P2 is 3.2 MPa; or, the second set value P2 is 3.3 MPa; or, the second set value P2 is 3.4 MPa; or, the second set value P2 is 3.5 MPa.

[0119] In some specific embodiments, a booster pump 26 is further provided on the evaporation pipe 20. When the pressure of the buffer 30 is less than 2 MPa, the first switch valve 25 is opened, the stop valve is opened, and the booster pump 26 is operated.

[0120] More specifically, the pressure in the buffer element 30 is greater than 3 MPa, the pressure in the hydrogen storage element 43 is greater than 3 MPa, the first switch valve 25 is closed, the stop valve is closed, and the boost pump 26 does not work.

[0121] Reference Figure 1 、 Figure 7 In some embodiments, the liquid hydrogen storage element 10 is provided with a third pressure detection element 11, and the evaporation pipe 20 is provided with a first switch valve 25. The control method includes:

[0122] S6: If the pressure value detected by the third pressure detection component is greater than the third set value, the first switch valve is controlled to open.

[0123] The third set value is a pre-set value. The third pressure detection element 11 detects the pressure within the liquid hydrogen storage element 10 and controls the opening and closing of the evaporation pipe 20 based on the pre-set value. It will be understood that when the vehicle is stationary, some liquid hydrogen will evaporate into gaseous hydrogen, causing the pressure within the liquid hydrogen storage element 10 to increase.

[0124] In the above scheme, when the pressure in the liquid hydrogen storage element 10 is greater than the third set value, the vehicle is stationary and the vehicle engine is not running, and the first switch valve 25 is controlled to open, so that the liquid hydrogen storage element 10 is depressurized. At the same time, the buffer element 30 is used to recover the gaseous hydrogen, thereby avoiding waste and improving utilization.

[0125] In some specific embodiments, the third set value is P3, 1 MPa≤P3≤1.6 MPa.

[0126] For example, the third set value P3 is 1 MPa; or, the third set value P3 is 1.1 MPa; or, the third set value P3 is 1.2 MPa; or, the third set value P3 is 1.3 MPa; or, the third set value P3 is 1.4 MPa; or, the third set value P3 is 1.5 MPa; or, the third set value P3 is 1.6 MPa.

[0127] In some embodiments, the buffer member 30 is provided with a first pressure detection member 31, and the boosting pipeline 40 is provided with a hydrogen storage member 43 and a shut-off valve. The hydrogen storage member 43 is used to store gaseous hydrogen. The control method includes:

[0128] S7: If the pressure value detected by the first pressure detection component is greater than the fourth set value, the stop valve is controlled to open.

[0129] Among them, the fourth set value is a preset value. The first pressure detection component 31 detects the pressure in the liquid hydrogen storage component 10, and controls the on-off of the boost pipe 40 according to the preset value. The stop valve is opened, and the gaseous hydrogen in the buffer component 30 flows into the hydrogen storage component 43.

[0130] In the above solution, when the pressure in the buffer 30 is relatively high, the shut-off valve is opened to allow more gaseous hydrogen in the buffer 30 to enter the liquid hydrogen storage element 10, and the gaseous hydrogen is recovered to avoid waste.

[0131] In some specific embodiments, the fourth set value is P4, 2.5 MPa≤P4≤3.5 MPa.

[0132] For example, the fourth set value P4 is 2.5 MPa; or, the fourth set value P4 is 2.6 MPa; or, the fourth set value P4 is 2.7 MPa; or, the fourth set value P4 is 2.8 MPa; or, the fourth set value P4 is 2.9 MPa; or, the fourth set value P4 is 3.0 MPa; or, the fourth set value P4 is 3.1 MPa; or, the fourth set value P4 is 3.2 MPa; or, the fourth set value P4 is 3.3 MPa; or, the fourth set value P4 is 3.4 MPa; or, the fourth set value P4 is 3.5 MPa.

[0133] In some specific embodiments, a first safety valve 32 is provided on the buffer component 30. When the pressure inside the hydrogen storage component 43 is greater than 3 MPa, the pressure inside the buffer component 30 is greater than 3 MPa, and the first safety valve 32 opens, thereby avoiding damage to various components and improving safety.

[0134] Reference Figure 1 、 Figure 6In some embodiments, a water bath evaporator is provided on the evaporation pipe 20, and the water bath evaporator is connected to a medium supply device 23 through a medium pipe 233. The medium supply device 23 supplies heat exchange medium to the water bath evaporator. A first heating element 24 is provided on the medium pipe 233. The control method includes:

[0135] S8: Sending a control instruction including a heating target temperature to the first heating element to control the first heating element to heat the heat exchange medium according to the heating target temperature.

[0136] The control instruction is an instruction, which is an electrical signal, and the first heating element 24 works according to the electrical signal.

[0137] The medium supply device 23 supplies heat exchange medium to the water bath evaporator, and the heat exchange medium exchanges heat with the liquid hydrogen in the water bath evaporator, thereby evaporating the liquid hydrogen.

[0138] In the above solution, the first heating element 24 is provided to heat the heat exchange medium. The first heating element 24 is used to increase the temperature of the heat exchange medium, thereby improving the evaporation effect of the water bath evaporator on liquid hydrogen and increasing the flow rate of gaseous hydrogen.

[0139] Specifically, the heat exchange medium may be water or other media.

[0140] In some embodiments, the medium supply device 23 includes a heat dissipation pipe 231 and a heat dissipation element 232 .

[0141] The heat dissipation pipe 231 is connected to the fuel cell 200 at both ends. A heat dissipation element 232 is provided on the heat dissipation pipe 231 to dissipate heat from the heat exchange medium discharged from the fuel cell 200. A medium pipe 233 is provided between the heat dissipation element 232 and the water bath evaporator to guide the heat exchange medium discharged from the heat dissipation element 232 to the water bath evaporator.

[0142] The heat dissipating element 232 on the heat dissipating pipe 231 dissipates heat for the heat exchange medium discharged from the fuel cell 200 , and the medium pipe 233 guides the heat exchange medium discharged from the fuel cell 200 to the water bath evaporator, where the heat exchange medium discharged from the fuel cell 200 is used to evaporate the liquid hydrogen.

[0143] In the above solution, the medium pipe 233 is provided to guide the heat exchange medium discharged from the fuel cell 200 to evaporate the liquid hydrogen, thereby making full use of each structure, improving the utilization rate, and reducing the total energy consumption.

[0144] Specifically, a driving pump 235 is provided on the heat dissipation pipe 231 , and the driving pump 235 drives the heat exchange medium in the heat dissipation pipe 231 to move.

[0145] More specifically, a second heating element 236 is further provided on the heat dissipation pipe 231 , and the second heating element 236 is connected in parallel with the heat dissipation element 232 to facilitate heating.

[0146] More specifically, a third temperature detecting component 2311 and a fourth temperature detecting component 2312 are further provided on the heat dissipation pipe 231 . The third temperature detecting component 2311 and the fourth temperature detecting component 2312 are respectively provided at two opposite ends of the heat dissipation component 232 .

[0147] More specifically, the heat dissipation pipe 231 is also connected to an expansion water tank 2313 .

[0148] Specifically, a thermostat is provided on the medium pipeline 233 , and the thermostat adjusts its opening according to the inlet temperature and outlet temperature of the heat sink 232 and the temperature of the heat exchange medium after being heated by the first heating element 24 .

[0149] In some specific embodiments, a heat exchange element 50 is provided between the buffer element 30 and the fuel cell 200 to improve control capability.

[0150] Furthermore, the heat exchange element 50 is constructed as a plate heat exchanger, which is connected to the heat dissipation pipe 231. The heat dissipation pipe 231 supplies heat exchange medium to the plate heat exchanger, further improving the utilization rate.

[0151] In some specific embodiments, a fifth temperature detector 52 , a second switch valve 53 , a third proportional valve 54 , an ejector 551 , and a fourth pressure detector 55 are provided on the first pipe 51 between the heat exchange element 50 and the fuel cell 200 .

[0152] Specifically, a fourth proportional valve 57 and a second one-way valve 58 are provided on the second pipe 56 between the heat exchange element 50 and the fuel cell 200 .

[0153] In some specific embodiments, a third switch valve 591 and a fourth switch valve 592 are further provided between the buffer element 30 and the heat exchange element 50 . When the fuel cell 200 needs to be activated by under-gassing, the third switch valve 591 is opened.

[0154] In some specific embodiments, the control method further includes:

[0155] S81: Calculate the flow rate of liquid hydrogen that needs to be vaporized based on the ambient temperature and the flow rate of gaseous hydrogen.

[0156] S82: Calculate the heating power and the heating target temperature based on the flow rate of liquid hydrogen to be vaporized.

[0157] Among them, the heating power is P, P heating power = CM△t, C is the specific heat capacity of liquid hydrogen, M is the mass of liquid hydrogen, and △t is the temperature difference of liquid hydrogen.

[0158] In the above scheme, the flow rate of liquid hydrogen that needs to be vaporized is calculated by using the ambient temperature and the flow rate of gaseous hydrogen, which is more practical and has better effects.

[0159] In some embodiments, there are multiple evaporation pipes 20, and the multiple evaporation pipes 20 are arranged in parallel. The multiple evaporation pipes 20 are respectively provided with a first switch valve 25. The control method includes:

[0160] S9: controlling any one or more of the plurality of first switch valves to open, so as to connect the liquid hydrogen storage element and the buffer element.

[0161] Wherein, a plurality of evaporation pipes 20 are connected in parallel, and the plurality of evaporation pipes 20 can work simultaneously, thereby increasing the evaporation amount and thus increasing the flow rate of the gaseous hydrogen. The plurality of evaporation pipes 20 can also work partially.

[0162] In the above solution, a plurality of evaporation pipes 20 connected in parallel are provided, and the liquid hydrogen is evaporated by using the plurality of evaporation pipes 20 , thereby increasing the flow rate of the gaseous hydrogen.

[0163] In some specific embodiments, a second proportional valve 234 is provided between the water bath evaporator and the medium supply device 23 , and the second proportional valve 234 is automatically adjusted according to the difference between the cooling water outlet temperature of the water bath evaporator and the heating target temperature of the first heating element 24 .

[0164] According to an embodiment of the present invention, the electronic device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the steps of the above-mentioned method for controlling the liquid hydrogen system are implemented.

[0165] According to the electronic device of an embodiment of the present invention, a pressurizing pipe 40 is provided between the liquid hydrogen storage element 10 and the buffer element 30. The pressurizing pipe 40 guides the gaseous hydrogen in the buffer element 30 into the liquid hydrogen storage element 10, and utilizes the gaseous hydrogen to increase the pressure in the liquid hydrogen storage element 10. The overall structure is simple and easy to implement, thereby solving the problem of insufficient pressure in the liquid hydrogen storage element 10.

[0166] According to an embodiment of the present invention, a readable storage medium stores a computer program thereon, and when the computer program is executed by a processor, the steps of the control method of the liquid hydrogen system as described above are implemented.

[0167] According to the readable storage medium of an embodiment of the present invention, a pressurizing pipe 40 is provided between the liquid hydrogen storage element 10 and the buffer element 30. The pressurizing pipe 40 guides the gaseous hydrogen in the buffer element 30 into the liquid hydrogen storage element 10, and the gaseous hydrogen is used to increase the pressure in the liquid hydrogen storage element 10. The overall structure is simple and easy to implement, thereby solving the problem of insufficient pressure in the liquid hydrogen storage element 10.

[0168] Specifically, the readable storage medium is a non-transitory computer-readable storage medium.

[0169] Other configurations and operations of the liquid hydrogen system 100 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0170] Throughout this specification, reference to terms such as "embodiment" or "example" indicates that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these 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 any one or more embodiments or examples.

[0171] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A control method for a liquid hydrogen system, characterized in that: The liquid hydrogen system includes: a liquid hydrogen storage element, an evaporation pipe, a buffer element, and a pressurization pipe. The liquid hydrogen storage element is used to store liquid hydrogen. One end of the evaporation pipe is connected to the liquid hydrogen storage element, and the other end of the evaporation pipe is connected to the buffer element to supply gaseous hydrogen to the buffer element. The buffer element is used to connect to a fuel cell to supply gaseous hydrogen to the fuel cell. The pressurization pipe has a pressurization inlet and a pressurization outlet. The pressurization inlet is connected to the buffer element, and the pressurization outlet is connected to the liquid hydrogen storage element to guide the gaseous hydrogen into the liquid hydrogen storage element. The control method includes: comparing a first pressure at a hydrogen inlet of the fuel cell with a second pressure in the liquid hydrogen storage element; If the second pressure is less than the first pressure, controlling the pressurization pipeline to connect to the liquid hydrogen storage element; The liquid hydrogen storage element is provided with a third pressure detection element, the evaporation pipe is provided with a first switch valve, the buffer element is provided with a first pressure detection element, the boosting pipe is provided with a hydrogen storage element and a shut-off valve, the hydrogen storage element is used to store the gaseous hydrogen, and the control method includes: If the pressure value detected by the third pressure detection element is greater than a third set value, the first switch valve is controlled to open, wherein the third set value is P3, 1MPa≤P3≤1.6MPa; If the pressure value detected by the first pressure detection component is greater than a fourth set value, the stop valve is controlled to open, wherein the fourth set value is P4, 2.5MPa≤P4≤3.5MPa.

2. The control method of the liquid hydrogen system according to claim 1, characterized in that: The boost pipe is further provided with a control valve, and if the second pressure is less than the first pressure, controlling the boost pipe to connect to the liquid hydrogen storage element comprises: If the second pressure is less than the first pressure, the control valve is controlled to open.

3. The control method of the liquid hydrogen system according to claim 2, characterized in that: The control valve is configured as a first proportional valve, and if the second pressure is less than the first pressure, controlling the control valve to open comprises: The opening of the first proportional valve is controlled according to the difference between the first pressure and the second pressure.

4. The control method of the liquid hydrogen system according to claim 2, characterized in that: The evaporation pipe is provided with a first switch valve, the buffer component is provided with a first pressure detection component, and the control method includes: If the pressure value detected by the first pressure detection component is greater than a first set value, the first switch valve is controlled to close, wherein the first set value is P1, 2.5MPa≤P1≤3.5MPa.

5. The control method of the liquid hydrogen system according to claim 4, characterized in that: The boost pipeline is provided with a hydrogen storage element and a shut-off valve, the hydrogen storage element is used to store the gaseous hydrogen, and the hydrogen storage element is provided with a second pressure detection element. The control method further includes: If the pressure value detected by the second pressure detection component is less than a second set value, the stop valve is controlled to open, wherein the second set value is P2, 2.5MPa≤P2≤3.5MPa.

6. The control method of the liquid hydrogen system according to claim 1, characterized in that: The evaporation pipe is provided with a water bath evaporator, the water bath evaporator is connected to a medium supply device through a medium pipe, the medium supply device supplies heat exchange medium to the water bath evaporator, and the medium pipe is provided with a first heating element. The control method includes: issuing a control instruction including a heating target temperature to the first heating element, controlling the first heating element to heat the heat exchange medium according to the heating target temperature; Calculate the liquid hydrogen flow rate that needs to be vaporized based on the ambient temperature and hydrogen flow rate; The heating power and the heating target temperature are calculated based on the flow rate of liquid hydrogen that needs to be vaporized.

7. The control method of the liquid hydrogen system according to claim 1, characterized in that: There are multiple evaporation pipes, the multiple evaporation pipes are arranged in parallel, and the multiple evaporation pipes are respectively provided with a first switch valve. The control method includes: Any one or more of the plurality of first switch valves are controlled to open to connect the liquid hydrogen storage element and the buffer element.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the steps of the control method of the liquid hydrogen system according to any one of claims 1 to 7 are implemented.

9. A readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the control method of the liquid hydrogen system according to any one of claims 1 to 7 are implemented.

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