Liquid hydrogen system and vehicle

Abstract

The utility model discloses a liquid hydrogen system and a vehicle, the liquid hydrogen system comprises: a liquid hydrogen storage member for storing liquid hydrogen; one end of the evaporation pipeline is communicated with the liquid hydrogen storage part; the other end of the evaporation pipeline is communicated with the buffer part so as to supply gaseous hydrogen to the buffer part, and the buffer part is used for being communicated with a fuel cell so as to supply gaseous hydrogen to the fuel cell; and the pressurizing pipeline is provided with a pressurizing inlet and a pressurizing outlet, the pressurizing inlet is communicated with the buffer piece, and the pressurizing outlet is communicated with the liquid hydrogen storage piece so as to guide the gaseous hydrogen into the liquid hydrogen storage piece. The pressurizing pipeline is arranged between the liquid hydrogen storage piece and the buffering piece, the gaseous hydrogen in the buffering piece is guided into the liquid hydrogen storage piece through the pressurizing pipeline, the pressure in the liquid hydrogen storage piece is increased through the gaseous hydrogen, the whole structure is simple, implementation is easy, and the problem that the pressure in the liquid hydrogen storage piece is insufficient is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobiles, in particular to a liquid hydrogen system and a vehicle. Background Art

[0002] In the related art, some fuel cell vehicles adopt the liquid hydrogen storage method, storing liquid hydrogen in a tank, and the tank is connected to a fuel cell to supply hydrogen to the fuel cell. However, in the related art, the pressure in the tank may be insufficient and cannot meet the requirements of the fuel cell. Summary of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a liquid hydrogen system for a vehicle, which solves the problem of insufficient pressure in the liquid hydrogen storage member.

[0004] A liquid hydrogen system for a vehicle according to an embodiment of the utility model includes: a liquid hydrogen storage member for storing liquid hydrogen; an evaporation pipeline, one end of the evaporation pipeline is connected to the liquid hydrogen storage member; a buffer member, the other end of the evaporation pipeline is connected to the buffer member to supply gaseous hydrogen to the buffer member, and the buffer member is used to connect to a fuel cell to supply gaseous hydrogen to the fuel cell; a pressurization pipeline, the pressurization pipeline has a pressurization inlet and a pressurization outlet, the pressurization inlet is connected to the buffer member, and the pressurization outlet is connected to the liquid hydrogen storage member to guide the gaseous hydrogen into the liquid hydrogen storage member.

[0005] In the liquid hydrogen system for a vehicle according to an embodiment of the utility model, by providing a pressurization pipeline between the liquid hydrogen storage member and the buffer member, the pressurization pipeline guides the gaseous hydrogen in the buffer member into the liquid hydrogen storage member, and uses the gaseous hydrogen to increase the pressure in the liquid hydrogen storage member. The overall structure is simple and easy to implement, and the problem of insufficient pressure in the liquid hydrogen storage member is solved.

[0006] In some embodiments, a hydrogen storage member and a stop valve are provided on the pressurization pipeline. The hydrogen storage member is used to store the gaseous hydrogen, and the stop valve is provided upstream and / or downstream of the hydrogen storage member to control the flow of the gaseous hydrogen.

[0007] In some embodiments, a pressure stabilizing valve is further provided on the pressurization pipeline. The pressure stabilizing valve is provided upstream of the hydrogen storage member, and a first proportional valve is further provided on the pressurization pipeline. The first proportional valve is provided downstream of the hydrogen storage member to adjust the supply amount of the gaseous hydrogen supplied by the hydrogen storage member to the liquid hydrogen storage member.

[0008] In some embodiments, a first evaporator and a second evaporator are provided on the evaporation pipeline, and the first evaporator and the second evaporator are arranged in sequence.

[0009] In some embodiments, the second evaporator is configured as a water bath evaporator, and the water bath evaporator is communicated with a medium supply device, and the medium supply device supplies a heat exchange medium to the water bath evaporator; wherein, a first heating element is provided between the medium supply device and the water bath evaporator to heat the heat exchange medium.

[0010] In some embodiments, the medium supply device includes: a heat dissipation pipeline, and two ends of the heat dissipation pipeline are respectively communicated with the fuel cell; a heat dissipation element, and the heat dissipation element is arranged on the heat dissipation pipeline to dissipate heat from the heat exchange medium discharged by the fuel cell; wherein, a medium pipeline is provided between the heat dissipation element and the water bath evaporator to guide the heat exchange medium discharged by the heat dissipation element to the water bath evaporator.

[0011] In some embodiments, there are a plurality of evaporation pipelines, and the plurality of evaporation pipelines are arranged in parallel.

[0012] In some embodiments, a plurality of the water bath evaporators are respectively arranged on the plurality of evaporation pipelines, and the plurality of water bath evaporators include a first water bath evaporator and a second water bath evaporator, and the first heating element is arranged upstream of the first water bath evaporator and the second water bath evaporator to supply the heat exchange medium to the first water bath evaporator and the second water bath evaporator respectively.

[0013] In some embodiments, the first evaporator is configured as a steam bath evaporator, and the steam bath evaporator is provided with a heat exchange portion, and the heat exchange portion is in contact with the atmospheric environment.

[0014] A vehicle according to an embodiment of the present invention includes the above-mentioned liquid hydrogen system.

[0015] By arranging a pressurization pipeline between the liquid hydrogen storage member and the buffer member, the vehicle according to the embodiment of the present invention guides the gaseous hydrogen in the buffer member into the liquid hydrogen storage member through the pressurization pipeline, and uses the gaseous hydrogen to increase the pressure in the liquid hydrogen storage member. The overall structure is simple and easy to implement, and the problem of insufficient pressure in the liquid hydrogen storage member is solved.

[0016] The additional aspects and advantages of the present invention will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0018] Figure 1 is a schematic diagram of the liquid hydrogen system of the vehicle in the embodiment of the present invention;

[0019] Figure 2The flow of the control method in the embodiment of the present utility model Figure 1 ;

[0020] Figure 3 The flow of the control method in the embodiment of the present utility model Figure 2 ;

[0021] Figure 4 The flow of the control method in the embodiment of the present utility model Figure 3 ;

[0022] Figure 5 The flow of the control method in the embodiment of the present utility model Figure 4 ;

[0023] Figure 6 The flow of the control method in the embodiment of the present utility model Figure 5 ;

[0024] Figure 7 The flow of the control method in the embodiment of the present utility model Figure 6 ;

[0025] Figure 8 The flow of the control method in the embodiment of the present utility model Figure 7 。

[0026] Reference numerals:

[0027] 100, the liquid hydrogen system of the vehicle;

[0028] 10, liquid hydrogen storage member; 11, third pressure detection member; 12, third safety valve;

[0029] 20, evaporation pipeline; 21, first evaporator; 221, first water bath evaporator; 222, second water bath evaporator; 23, medium supply device; 231, heat dissipation pipeline; 2311, third temperature detection member; 2312, fourth temperature detection member; 2313, expansion tank; 232, heat dissipation member; 233, medium pipeline; 234, second proportional valve; 235, drive pump; 236, second heating member; 24, first heating member; 25, first switching valve; 26, booster pump; 27, second temperature detection member; 28, first check valve;

[0030] 30, buffer member; 31, first pressure detection member; 32, first safety valve; 40, booster pipeline; 43, hydrogen storage member; 431, second pressure detection member; 432, second safety valve; 441, first stop valve; 442, second stop valve; 45, pressure stabilizing valve; 46, first proportional valve; 47, first temperature detection member;

[0031] 50. Heat exchanger; 51. First pipeline; 52. Fifth temperature detector; 53. Second switching valve; 54. Third proportional valve; 55. Fourth pressure detector; 551. Ejector; 56. Second pipeline; 57. Fourth proportional valve; 58. Second check valve; 591. Third switching valve; 592. Fourth switching valve;

[0032] 200. Fuel cell. Detailed implementation mode

[0033] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the 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 construed as a limitation of the present invention.

[0035] In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features, which are used to distinguish and describe features, without order or importance.

[0036] In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0037] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0038] The liquid hydrogen system 100 of the vehicle according to the embodiment of the present invention will be described below with reference to the drawings.

[0039] Refer to Figure 1, according to the liquid hydrogen system 100 of a vehicle in an embodiment of the present utility model, the liquid hydrogen system 100 of the vehicle includes: a liquid hydrogen storage member 10, an evaporation pipeline 20, a buffer member 30, and a pressurization pipeline 40.

[0040] The liquid hydrogen storage member 10 is used for storing liquid hydrogen. One end of the evaporation pipeline 20 is connected to the liquid hydrogen storage member 10. The other end of the evaporation pipeline 20 is connected to the buffer member 30 to supply gaseous hydrogen to the buffer member 30. The buffer member 30 is used for connecting to a fuel cell 200 to supply gaseous hydrogen to the fuel cell 200. The pressurization pipeline 40 has a pressurization inlet and a pressurization outlet. The pressurization inlet is connected to the buffer member 30, and the pressurization outlet is connected to the liquid hydrogen storage member 10 to guide gaseous hydrogen into the liquid hydrogen storage member.

[0041] Among them, the evaporation pipeline 20 is arranged between the liquid hydrogen storage member 10 and the buffer member 30. When the liquid hydrogen in the liquid hydrogen storage member 10 passes through the evaporation pipeline 20, it evaporates itself and turns into gaseous hydrogen. The gaseous hydrogen flows into the buffer member 30. The buffer member 30 provides a certain buffering effect, which can improve the pressure fluctuation. The gaseous hydrogen in the buffer member 30 can be guided to the fuel cell 200 to provide gaseous hydrogen for the operation of the fuel cell 200.

[0042] In the related art, some fuel cell vehicles adopt the liquid hydrogen storage method, storing liquid hydrogen in a tank. The tank is connected to the fuel cell to supply hydrogen to the fuel cell. However, in the related art, the pressure in the tank may be insufficient and cannot meet the requirements of the fuel cell.

[0043] In the embodiment of the present utility model, a pressurization pipeline 40 is added. The pressurization pipeline 40 is arranged between the buffer member 30 and the liquid hydrogen storage member 10, guiding the gaseous hydrogen in the buffer member 30 into the liquid hydrogen storage member 10 to increase the pressure in the liquid hydrogen storage member 10, thereby meeting the requirements of the fuel cell 200.

[0044] Among them, the pressurization inlet of the pressurization pipeline 40 is connected to the buffer member 30, and the gaseous hydrogen in the buffer member 30 flows to the pressurization inlet. The pressurization outlet of the pressurization pipeline 40 is connected to the liquid hydrogen storage member 10, and the gaseous hydrogen in the pressurization pipeline 40 flows to the liquid hydrogen storage member 10, thereby increasing the pressure in the liquid hydrogen storage member 10.

[0045] According to the liquid hydrogen system 100 of a vehicle in an embodiment of the present utility model, by arranging a pressurization pipeline 40 between the liquid hydrogen storage member 10 and the buffer member 30, the pressurization pipeline 40 guides the gaseous hydrogen in the buffer member 30 into the liquid hydrogen storage member 10, using the gaseous hydrogen to increase the pressure in the liquid hydrogen storage member 10. The overall structure is simple and easy to implement, solving the problem of insufficient pressure in the liquid hydrogen storage member 10.

[0046] Refer to Figure 1, in some embodiments, a hydrogen storage member 43 and a shut-off valve are provided on the pressure boosting pipeline 40. The hydrogen storage member 43 is used to store gaseous hydrogen, and the shut-off valve is provided upstream and / or downstream of the hydrogen storage member 43 to control the flow of gaseous hydrogen.

[0047] Among them, the shut-off valve can be provided upstream of the hydrogen storage member 43. That is to say, the gaseous hydrogen flowing from the buffer member 30 to the liquid hydrogen storage member 10 first flows through the shut-off valve and then flows to the hydrogen storage member 43; alternatively, the shut-off valve can also be provided downstream of the hydrogen storage member 43. That is to say, the gaseous hydrogen flowing from the buffer member 30 to the liquid hydrogen storage member 10 first flows through the hydrogen storage member 43 and then flows through the shut-off valve; or, shut-off valves are provided both upstream and downstream of the hydrogen storage member 43. For example, the shut-off valve includes a first shut-off valve 441 and a second shut-off valve 442. The first shut-off valve 441 is provided upstream of the hydrogen storage member 43, and the second shut-off valve 442 is provided downstream of the hydrogen storage member 43.

[0048] In the above solution, by providing the hydrogen storage member 43 on the pressure boosting pipeline 40, the hydrogen storage member 43 is used to store gaseous hydrogen. The hydrogen storage member 43 provides a certain buffering effect. At the same time, the hydrogen storage member 43 can reserve a certain volume of hydrogen to play the role of a backup solution. At the same time, it can be understood that liquid hydrogen will also evaporate under static conditions. Both the hydrogen storage member 43 and the buffer member 30 can be used to recover the evaporated gaseous hydrogen, improving the utilization rate.

[0049] Specifically, in the related art, the static evaporation rate of liquid hydrogen at room temperature is as high as 4.5%. According to the current long-distance trunk line demand calculation, the vehicle needs to carry more than 80 kg of liquid hydrogen. Calculated according to the liquid hydrogen static evaporation rate of 3% at room temperature, if the vehicle is in a stationary state, about 3.4 kg of liquid hydrogen will evaporate every day. If the mass-produced liquid hydrogen price is 50 yuan / kg, the direct loss is about 175 yuan every day. The present utility model reduces the loss by providing the buffer member 30 and the hydrogen storage member 43 for collecting the evaporated hydrogen.

[0050] Refer to Figure 1 , in some embodiments, a pressure stabilizing valve 45 is further provided on the pressure boosting pipeline 40. The pressure stabilizing valve 45 is provided upstream of the hydrogen storage member 43. A first proportional valve 46 is further provided on the pressure boosting pipeline 40. The first proportional valve 46 is provided downstream of the hydrogen storage member 43 to adjust the supply amount of gaseous hydrogen supplied by the hydrogen storage member 43 to the liquid hydrogen storage member 10.

[0051] Among them, the gaseous hydrogen flowing from the buffer member 30 to the liquid hydrogen storage member 10 first flows through the pressure stabilizing valve 45 and then flows to the hydrogen storage member 43. For example, the pressure stabilizing valve 45 consists of a housing with an adjusting spring and a valve core. When the pressure is lower than the set value, the adjusting spring pushes the valve core to open the valve port, allowing more fluid to pass through, thereby increasing the pressure. When the pressure reaches the set value, the spring compresses, and the valve core closes or partially closes to reduce the fluid passing amount and stabilize the pressure.

[0052] Among them, a first proportional valve 46 is also provided on the boosting pipeline 40. The first proportional valve 46 adjusts the supply amount of gaseous hydrogen supplied by the hydrogen storage member 43 to the liquid hydrogen storage member 10, automatically adjusts its own opening degree, and thus controls the pressure. For example, the first proportional valve 46 consists of an electromagnetic coil, a valve core, a spring, a position sensor, etc. By applying different currents to the electromagnetic coil, the valve core is driven to move in the valve body, thereby changing the opening degree of the valve port and adjusting the flow rate and pressure of the fluid. The position sensor feeds back the position of the valve core to the controller to achieve closed-loop control and ensure accurate positioning of the valve core.

[0053] In the above solution, by setting the pressure stabilizing valve 45, the pressure is increased to the required level, and the first proportional valve 46 is provided to automatically control the pressure by using the first proportional valve 46, and the overall structure is simple.

[0054] Refer to Figure 1 , in some embodiments, a first evaporator 21 and a second evaporator are provided on the evaporation pipeline 20, and the first evaporator 21 and the second evaporator are arranged in sequence.

[0055] Among them, the first evaporator 21 and the second evaporator process the liquid hydrogen successively, so that the liquid hydrogen evaporates into gaseous hydrogen. For example, the working principle of the evaporator is based on the heat exchange and phase change process. The liquid absorbs heat in the evaporator, starts to evaporate after reaching its boiling point, and turns into gas. It can be understood that the liquid hydrogen may be mixed with gaseous hydrogen after passing through the first evaporator 21, that is, the second evaporator will act on both the liquid hydrogen and the gaseous hydrogen at the same time.

[0056] In the above solution, by arranging the first evaporator 21 and the second evaporator in sequence to evaporate the liquid hydrogen successively and perform secondary evaporation, the evaporation effect is improved.

[0057] Specifically, the evaporator can be a tubular evaporator, a plate evaporator, or a spray evaporator.

[0058] 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.

[0059] Refer to Figure 1, in some embodiments, the second evaporator is configured as a water bath evaporator, and the water bath evaporator is connected to a medium supply device 23, and the medium supply device 23 supplies a 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.

[0060] Wherein, the medium supply device 23 supplies a heat exchange medium to the water bath evaporator, and the heat exchange medium exchanges heat with liquid hydrogen in the water bath evaporator, thereby evaporating the liquid hydrogen.

[0061] In the above solution, by setting the first heating element 24 to heat the heat exchange medium, the temperature of the heat exchange medium is increased by the first heating element 24, the evaporation effect of the water bath evaporator on liquid hydrogen is improved, and the flow rate of gaseous hydrogen is increased.

[0062] Specifically, the heat exchange medium can be water or others.

[0063] Refer to Figure 1 , in some embodiments, the medium supply device 23 includes: a heat dissipation pipeline 231 and a heat dissipation element 232.

[0064] Both ends of the heat dissipation pipeline 231 are respectively connected to the fuel cell 200. The heat dissipation element 232 is arranged on the heat dissipation pipeline 231 to dissipate heat from the heat exchange medium discharged by the fuel cell 200; wherein, a medium pipeline 233 is provided between the heat dissipation element 232 and the water bath evaporator to guide the heat exchange medium discharged by the heat dissipation element 232 to the water bath evaporator.

[0065] Wherein, the heat dissipation element 232 on the heat dissipation pipeline 231 dissipates heat from the heat exchange medium discharged by the fuel cell 200, and the medium pipeline 233 guides the heat exchange medium discharged by the fuel cell 200 to the water bath evaporator, and the heat exchange medium discharged by the fuel cell 200 is used to evaporate the liquid hydrogen.

[0066] In the above solution, by setting the medium pipeline 233 to guide the heat exchange medium discharged by the fuel cell 200 to evaporate the liquid hydrogen, each part of the structure is fully utilized, the utilization rate is improved, and the total energy consumption is reduced.

[0067] Refer to Figure 1 , in some embodiments, there are multiple evaporation pipelines 20, and the multiple evaporation pipelines 20 are arranged in parallel.

[0068] Wherein, the multiple evaporation pipelines 20 are in parallel, and the multiple evaporation pipelines 20 can work simultaneously, improving the evaporation amount, thereby increasing the flow rate of gaseous hydrogen. Some of the multiple evaporation pipelines 20 can also work, adapting to different working conditions.

[0069] In the above solution, by setting multiple parallel evaporation pipelines 20, the multiple evaporation pipelines 20 are used to evaporate the liquid hydrogen, thereby increasing the flow rate of gaseous hydrogen.

[0070] Referring to Figure 1 , in some embodiments, a plurality of water bath evaporators are respectively provided on a plurality of evaporation pipes 20. The plurality of water bath evaporators include a first water bath evaporator 221 and a second water bath evaporator 222. A first heating member 24 is provided upstream of the first water bath evaporator 221 and the second water bath evaporator 222 to supply a heat exchange medium to the first water bath evaporator 221 and the second water bath evaporator 222 respectively.

[0071] Among them, a water bath evaporator is correspondingly provided on the evaporation pipe 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 another evaporation pipe 20. The first heating member 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 jointly utilize the same first heating member 24.

[0072] In the above solution, by providing a plurality of water bath evaporators to share the same first heating member 24, the utilization rate is improved, the structure is simplified, and the number of components is reduced.

[0073] Specifically, the first heating member 24 may be a positive temperature coefficient material member (Positive Temperature Coefficient, abbreviated as PTC). The resistance of the positive temperature coefficient material member will increase significantly with the increase of temperature, thereby regulating and limiting the current.

[0074] Referring to Figure 1 , in some embodiments, the first evaporator 21 is configured as a steam bath evaporator. The steam bath evaporator is provided with a heat exchange portion, and the heat exchange portion is in contact with the atmospheric environment.

[0075] Among them, the steam bath evaporator has a heat exchange portion, and the heat exchange portion is directly in contact with the atmospheric environment. Liquid hydrogen is directly in heat exchange with the atmospheric environment.

[0076] In the above solution, the steam bath evaporator is used to evaporate liquid hydrogen, saving energy. And when the vehicle is stationary, the steam bath evaporator can still evaporate liquid hydrogen, which helps to recover liquid hydrogen.

[0077] The vehicle according to an embodiment of the present invention includes the above-mentioned liquid hydrogen system.

[0078] The vehicle according to an embodiment of the present invention, by providing a pressurizing pipe 40 between the liquid hydrogen storage member 10 and the buffer member 30, the pressurizing pipe 40 guides the gaseous hydrogen in the buffer member 30 into the liquid hydrogen storage member 10, and uses the gaseous hydrogen to increase the pressure in the liquid hydrogen storage member 10. The overall structure is simple and easy to implement, and solves the problem of insufficient pressure in the liquid hydrogen storage member 10.

[0079] Referring toFigure 1 , Figure 2 , According to the control method of the liquid hydrogen system of the embodiments of the present utility model, the liquid hydrogen system includes: a liquid hydrogen storage member 10, an evaporation pipeline 20, a buffer member 30 and a pressurization pipeline 40. The liquid hydrogen storage member 10 is used for storing liquid hydrogen. One end of the evaporation pipeline 20 is connected to the liquid hydrogen storage member 10, and the other end of the evaporation pipeline 20 is connected to the buffer member 30 to supply gaseous hydrogen to the buffer member 30. The buffer member 30 is used for connecting to a fuel cell 200 to supply gaseous hydrogen to the fuel cell 200. The pressurization pipeline 40 has a pressurization inlet and a pressurization outlet. The pressurization inlet is connected to the buffer member 30, and the pressurization outlet is connected to the liquid hydrogen storage member 10 to guide gaseous hydrogen into the liquid hydrogen storage member.

[0080] Among them, the evaporation pipeline 20 is arranged between the liquid hydrogen storage member 10 and the buffer member 30. When the liquid hydrogen in the liquid hydrogen storage member 10 passes through the evaporation pipeline 20, it evaporates by itself and turns into gaseous hydrogen. The gaseous hydrogen flows into the buffer member 30. The buffer member 30 provides a certain buffering effect, which can improve the pressure fluctuation. The gaseous hydrogen in the buffer member 30 can be guided to the fuel cell 200 to provide gaseous hydrogen for the operation of the fuel cell 200.

[0081] The control method includes:

[0082] S2: Compare the first pressure at the hydrogen inlet of the fuel cell with the second pressure in the liquid hydrogen storage member.

[0083] Among them, the fuel cell 200 has a hydrogen inlet. The gaseous hydrogen enters the fuel cell 200 through the hydrogen inlet. The first pressure reflects the pressure of the gaseous hydrogen supplied to the fuel cell 200. The second pressure reflects the pressure in the liquid storage member.

[0084] S3: If the second pressure is less than the first pressure, control the pressurization pipeline to connect to the liquid hydrogen storage member.

[0085] In the related art, some fuel cell vehicles adopt the liquid hydrogen storage method, store liquid hydrogen in a tank, and the tank is connected to the fuel cell to supply hydrogen to the fuel cell. However, in the related art, the pressure in the tank may be insufficient and cannot meet the requirements of the fuel cell.

[0086] In the embodiments of the present utility model, a pressurization pipeline 40 is added. The pressurization pipeline 40 is arranged between the buffer member 30 and the liquid hydrogen storage member 10 to guide the gaseous hydrogen in the buffer member 30 into the liquid hydrogen storage member 10, increasing the pressure in the liquid hydrogen storage member 10, so as to meet the requirements of the fuel cell 200.

[0087] For example, when the second pressure increases to be greater than the first pressure, the pressure between the second pressure and the second pressure enables the liquid hydrogen to be smoothly discharged from the liquid hydrogen storage member 10.

[0088] Among them, the boosting inlet of the boosting pipeline 40 is connected to the buffer member 30, the gaseous hydrogen in the buffer member 30 flows towards the boosting inlet, the boosting outlet of the boosting pipeline 40 is connected to the liquid hydrogen storage member 10, and the gaseous hydrogen in the boosting pipeline 40 flows towards the liquid hydrogen storage member 10, thereby increasing the pressure in the liquid hydrogen storage member 10.

[0089] According to the control method of the embodiment of the present invention, by arranging a boosting pipeline 40 between the liquid hydrogen storage member 10 and the buffer member 30, the boosting pipeline 40 guides the gaseous hydrogen in the buffer member 30 into the liquid hydrogen storage member 10, and uses the gaseous hydrogen to increase the pressure in the liquid hydrogen storage member 10. The overall structure is simple and easy to implement, and the problem of insufficient pressure in the liquid hydrogen storage member 10 is solved.

[0090] Refer to Figure 1 、 Figure 3 , in some embodiments, a control valve is further provided on the boosting pipeline 40. If the second pressure is less than the first pressure, controlling the boosting pipeline to communicate with the liquid hydrogen storage member includes:

[0091] S31: If the second pressure is less than the first pressure, control the control valve to open.

[0092] Among them, the control valve controls the on-off of the boosting pipeline 40. By setting the control valve to control the on-off of the boosting pipeline 40, subsequent control is facilitated. For example, the control valve is a proportional valve or a switch valve, etc.

[0093] Refer to Figure 1 、 Figure 4 , in some embodiments, the control valve is configured as a first proportional valve 46. If the second pressure is less than the first pressure, controlling the control valve to open includes:

[0094] S311: Control the opening degree of the first proportional valve according to the difference between the first pressure and the second pressure.

[0095] Specifically, the control valve is configured as a first proportional valve 46, and the first proportional valve 46 is used to automatically control the boosting effect of the boosting pipeline 40. For example, if the difference between the first pressure and the second pressure is large, the opening degree of the first proportional valve 46 is large; if the difference between the first pressure and the second pressure is small, the opening degree of the first proportional valve 46 is small.

[0096] It should be noted that the control valve is configured as a first proportional valve 46. When the first pressure is less than the second pressure, the liquid hydrogen storage member 10 does not need to be boosted, and the first proportional valve 46 is closed.

[0097] Refer to Figure 1 、 Figure 5 , in some embodiments, a first switch valve 25 is provided on the evaporation pipeline 20, and a first pressure detection member 31 is provided on the buffer member 30. The control method includes:

[0098] S4: If the pressure value detected by the first pressure detector is greater than the first set value, control the first switching valve to close.

[0099] Among them, the first set value is a preset value. The first pressure detector 31 detects the pressure in the buffer 30 and controls the on-off of the evaporation pipeline 20 according to the preset value.

[0100] In the above solution, when the pressure in the buffer 30 is greater than the first set value, the process of the evaporation pipeline 20 supplying gaseous hydrogen to the buffer 30 is stopped, preventing the buffer 30 from being damaged and protecting the buffer 30.

[0101] In some specific embodiments, the first set value is P1, and 2.5 MPa ≤ P1 ≤ 3.5 MPa.

[0102] 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.

[0103] Refer to 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 configured as a normally closed valve. When the pressure in the buffer 30 is greater than 3.5 MPa, control the first safety valve 32 to open, thereby further improving safety.

[0104] In some embodiments, a second safety valve 432 is provided on the hydrogen storage member 43, improving the safety level.

[0105] In some specific embodiments, a first temperature detector 47 is provided on the pressurization pipeline 40 to detect the temperature.

[0106] In some embodiments, a third safety valve 12 is provided on the liquid hydrogen storage member 10, improving the safety level.

[0107] In some specific embodiments, a second temperature detector 27 is provided on the evaporation pipeline 20 to detect the temperature.

[0108] Furthermore, a first check valve 28 is further provided on the evaporation pipeline 20.

[0109] In some embodiments, a hydrogen storage member 43 and a stop valve are provided on the pressure boosting pipeline 40. The hydrogen storage member 43 is used to store gaseous hydrogen. The hydrogen storage member 43 is provided with a second pressure detection member 431. The control method further includes:

[0110] S5: If the pressure value detected by the second pressure detection member is less than the second set value, control the stop valve to open.

[0111] Wherein, the second set value is a preset value. The second pressure detection member 431 detects the pressure inside the hydrogen storage member 43, and controls the on-off of the pressure boosting pipeline 40 according to the preset value.

[0112] In the above solution, on the premise that the pressure inside the hydrogen storage member 43 is less than the second set value, the gaseous hydrogen discharged from the buffer member 30 is collected into the hydrogen storage member 43, avoiding waste.

[0113] Wherein, the stop valve can be arranged upstream of the hydrogen storage member 43. That is to say, the gaseous hydrogen flowing from the buffer member 30 to the liquid hydrogen storage member 10 first flows through the stop valve and then flows to the hydrogen storage member 43; or, the stop valve can also be arranged downstream of the hydrogen storage member 43. That is to say, the gaseous hydrogen flowing from the buffer member 30 to the liquid hydrogen storage member 10 first flows through the hydrogen storage member 43 and then flows through the stop valve; or, stop valves are arranged both upstream and downstream of the hydrogen storage member 43. For example, the stop valve includes a first stop valve 441 and a second stop valve 442. The first stop valve 441 is arranged upstream of the hydrogen storage member 43, and the second stop valve 442 is arranged downstream of the hydrogen storage member 43.

[0114] In the above solution, by providing a hydrogen storage member 43 on the pressure boosting pipeline 40, the hydrogen storage member 43 is used to store gaseous hydrogen, and the hydrogen storage member 43 provides a certain buffering effect. At the same time, the hydrogen storage member 43 can reserve a certain volume of hydrogen to play the role of a backup solution. At the same time, it can be understood that liquid hydrogen will also evaporate under static conditions. Both the hydrogen storage member 43 and the buffer member 30 can be used to recover the evaporated gaseous hydrogen, improving the utilization rate.

[0115] Specifically, in the related art, the static evaporation rate of liquid hydrogen at normal temperature is as high as 4.5%. According to the current long-distance trunk line demand calculation, the vehicle needs to carry more than 80 kg of liquid hydrogen. Calculated according to the liquid hydrogen static evaporation rate of 3% at normal temperature, if the vehicle is in a stationary state, about 3.4 kg of liquid hydrogen will evaporate every day. If the mass-produced liquid hydrogen price is 50 yuan / kg, the direct loss per day is about 175 yuan. The utility model reduces the loss by providing a buffer member 30 and a hydrogen storage member 43 for collecting the evaporated hydrogen.

[0116] In some specific embodiments, the second set value is P2, and 2.5 MPa ≤ P2 ≤ 3.5 MPa.

[0117] 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.

[0118] In some specific embodiments, a booster pump 26 is further provided on the evaporation pipeline 20. When the pressure of the buffer member 30 is less than 2 MPa, the first switching valve 25 is opened, the stop valve is opened, and the booster pump 26 operates.

[0119] More specifically, when the pressure inside the buffer member 30 is greater than 3 Mpa and the pressure inside the hydrogen storage member 43 is greater than 3 Mpa, the first switching valve 25 is closed, the stop valve is closed, and the booster pump 26 does not operate.

[0120] Refer to Figure 1 、 Figure 7 , in some embodiments, the liquid hydrogen storage member 10 is provided with a third pressure detection member 11, and the evaporation pipeline 20 is provided with a first switching valve 25. The control method includes:

[0121] S6: If the pressure value detected by the third pressure detection member is greater than the third set value, control the first switching valve to open.

[0122] Wherein, the third set value is a preset value. The third pressure detection member 11 detects the pressure inside the liquid hydrogen storage member 10 and controls the on-off of the evaporation pipeline 20 according to the preset value. It can be understood that when the vehicle is stationary, some liquid hydrogen will evaporate into gaseous hydrogen, increasing the pressure inside the liquid hydrogen storage member 10.

[0123] In the above solution, when the pressure inside the liquid hydrogen storage member 10 is greater than the third set value, the vehicle is stationary and the vehicle engine is not working. Control the first switching valve 25 to open, so that the liquid hydrogen storage member 10 is depressurized, and at the same time, the buffer member 30 is used to recover the gaseous hydrogen, avoiding waste and improving the utilization rate.

[0124] In some specific embodiments, the third set value is P3, and 1 MPa ≤ P3 ≤ 1.6 MPa.

[0125] 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.

[0126] In some embodiments, the buffer member 30 is provided with a first pressure detector 31, and the hydrogen storage member 43 and a stop valve are provided on the pressurization pipeline 40. The hydrogen storage member 43 is used for storing gaseous hydrogen. The control method includes:

[0127] S7: If the pressure value detected by the first pressure detector is greater than the fourth set value, control the stop valve to open.

[0128] Wherein, the fourth set value is a preset value. The first pressure detector 31 detects the pressure in the liquid hydrogen storage member 10, controls the on-off of the pressurization pipeline 40 according to the preset value, the stop valve opens, and the gaseous hydrogen in the buffer member 30 flows into the hydrogen storage member 43.

[0129] In the above solution, when the pressure in the buffer member 30 is relatively high, the stop valve is opened, so that more gaseous hydrogen in the buffer member 30 enters the liquid hydrogen storage member 10, recovering the gaseous hydrogen and avoiding waste.

[0130] In some specific embodiments, the fourth set value is P4, and 2.5 MPa ≤ P4 ≤ 3.5 MPa.

[0131] 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.

[0132] In some specific embodiments, a first safety valve 32 is provided on the buffer member 30. When the pressure in the hydrogen storage member 43 is greater than 3 Mpa and the pressure in the buffer member 30 is greater than 3 Mpa, the first safety valve 32 opens, thereby avoiding damage to each component and improving safety.

[0133] Refer to Figure 1 、 Figure 6, in some embodiments, a water bath evaporator is provided on the evaporation pipeline 20. The water bath evaporator is connected to a medium supply device 23 through a medium pipeline 233. The medium supply device 23 supplies a heat exchange medium to the water bath evaporator. A first heating element 24 is provided on the medium pipeline 233. The control method includes:

[0134] S8: Send a control instruction including a heating target temperature to the first heating element, and control the first heating element to heat the heat exchange medium according to the heating target temperature.

[0135] Among them, the control instruction is an instruction, which is an electrical signal, and the first heating element 24 operates according to the electrical signal.

[0136] Among them, the medium supply device 23 supplies a heat exchange medium to the water bath evaporator. The heat exchange medium exchanges heat with liquid hydrogen in the water bath evaporator, thereby evaporating the liquid hydrogen.

[0137] In the above solution, by setting the first heating element 24 to heat the heat exchange medium, using the first heating element 24 to increase the temperature of the heat exchange medium, the evaporation effect of the water bath evaporator on liquid hydrogen is improved, and the flow rate of gaseous hydrogen is increased.

[0138] Specifically, the heat exchange medium can be water or others.

[0139] In some embodiments, the medium supply device 23 includes: a heat dissipation pipeline 231 and a heat dissipation element 232.

[0140] Both ends of the heat dissipation pipeline 231 are respectively connected to the fuel cell 200. The heat dissipation element 232 is provided on the heat dissipation pipeline 231 to dissipate heat from the heat exchange medium discharged by the fuel cell 200. Among them, a medium pipeline 233 is provided between the heat dissipation element 232 and the water bath evaporator to guide the heat exchange medium discharged by the heat dissipation element 232 to the water bath evaporator.

[0141] Among them, the heat dissipation element 232 on the heat dissipation pipeline 231 dissipates heat from the heat exchange medium discharged by the fuel cell 200. The medium pipeline 233 guides the heat exchange medium discharged by the fuel cell 200 to the water bath evaporator, and uses the heat exchange medium discharged by the fuel cell 200 to evaporate the liquid hydrogen.

[0142] In the above solution, by setting the medium pipeline 233 to guide the heat exchange medium discharged by the fuel cell 200 to evaporate the liquid hydrogen, making full use of each part of the structure, the utilization rate is improved, and the total energy consumption is reduced.

[0143] Specifically, a driving pump 235 is provided on the heat dissipation pipeline 231, and the driving pump 235 drives the heat exchange medium in the heat dissipation pipeline 231 to move.

[0144] More specifically, a second heating element 236 is further provided on the heat dissipation pipeline 231. The second heating element 236 is connected in parallel with the heat dissipation element 232 for convenient heating.

[0145] More specifically, a third temperature detector 2311 and a fourth temperature detector 2312 are further provided on the heat dissipation pipe 231, and the third temperature detector 2311 and the fourth temperature detector 2312 are respectively arranged at opposite ends of the heat dissipation member 232.

[0146] More specifically, the heat dissipation pipe 231 is further communicated with an expansion water tank 2313.

[0147] Specifically, a thermostat is provided on the medium pipe 233, and the thermostat adjusts the opening according to the inlet temperature, outlet temperature of the heat dissipation member 232 and the temperature of the heat exchange medium after being heated by the first heating member 24.

[0148] In some specific embodiments, a heat exchange member 50 is provided between the buffer member 30 and the fuel cell 200 to improve the control ability.

[0149] Further, the heat exchange member 50 is configured as a plate heat exchanger, and the plate heat exchanger is communicated with the heat dissipation pipe 231, and the heat dissipation pipe 231 supplies the heat exchange medium to the plate heat exchanger, further improving the utilization rate.

[0150] 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 member 50 and the fuel cell 200.

[0151] Specifically, a fourth proportional valve 57 and a second one-way valve 58 are provided on the second pipe 56 between the heat exchange member 50 and the fuel cell 200.

[0152] In some specific embodiments, a third switch valve 591 and a fourth switch valve 592 are further provided between the buffer member 30 and the heat exchange member 50, and the third switch valve 591 is opened when the fuel cell 200 needs under-gas activation.

[0153] In some specific embodiments, the control method further includes:

[0154] S81: Calculate the liquid hydrogen flow rate that needs to be vaporized according to the ambient temperature and the gaseous hydrogen flow rate.

[0155] S82: Calculate the heating power and the heating target temperature according to the liquid hydrogen flow rate that needs to be vaporized.

[0156] Wherein, the heating power is P, and P heating power = CMΔt, C is the specific heat capacity of liquid hydrogen, M is the mass of liquid hydrogen, and Δt is the liquid hydrogen temperature difference.

[0157] In the above solution, calculating the liquid hydrogen flow rate that needs to be vaporized according to the ambient temperature and the gaseous hydrogen flow rate is more in line with the actual situation and has better effects.

[0158] In some embodiments, there are multiple evaporation pipes 20, and the multiple evaporation pipes 20 are arranged in parallel. First switching valves 25 are respectively provided on the multiple evaporation pipes 20. The control method includes:

[0159] S9: Control any one or more of the multiple first switching valves to open so as to connect the liquid hydrogen storage member and the buffer member.

[0160] Among them, the multiple evaporation pipes 20 are in parallel. The multiple evaporation pipes 20 can work simultaneously, increasing the evaporation amount, thereby increasing the flow rate of gaseous hydrogen, or some of them can work.

[0161] In the above solution, by providing multiple parallel evaporation pipes 20, the liquid hydrogen is evaporated by the multiple evaporation pipes 20, thereby increasing the flow rate of gaseous hydrogen.

[0162] In some specific embodiments, a second proportional valve 234 is provided between the water bath evaporator and the medium supply device 23. 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 member 24.

[0163] According to the electronic device of the embodiment of the present invention, the electronic device includes a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, the steps of the control method of the above liquid hydrogen system are implemented.

[0164] According to the electronic device of the embodiment of the present invention, by providing a pressurizing pipe 40 between the liquid hydrogen storage member 10 and the buffer member 30, the pressurizing pipe 40 guides the gaseous hydrogen in the buffer member 30 into the liquid hydrogen storage member 10, and the gaseous hydrogen is used to increase the pressure in the liquid hydrogen storage member 10. The overall structure is simple and easy to implement, and the problem of insufficient pressure in the liquid hydrogen storage member 10 is solved.

[0165] According to the readable storage medium of the embodiment of the present invention, a computer program is stored thereon. 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.

[0166] According to the readable storage medium of the embodiment of the present invention, by providing a pressurizing pipe 40 between the liquid hydrogen storage member 10 and the buffer member 30, the pressurizing pipe 40 guides the gaseous hydrogen in the buffer member 30 into the liquid hydrogen storage member 10, and the gaseous hydrogen is used to increase the pressure in the liquid hydrogen storage member 10. The overall structure is simple and easy to implement, and the problem of insufficient pressure in the liquid hydrogen storage member 10 is solved.

[0167] Specifically, the readable storage medium is a non-transitory computer-readable storage medium.

[0168] Other configurations and operations of the liquid hydrogen system 100 according to the embodiments of the present utility model are known to those of ordinary skill in the art and will not be described in detail here.

[0169] In the description of this specification, the description with reference to terms such as "embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0170] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and purposes of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A liquid hydrogen system for a vehicle, characterized in that: include: A liquid hydrogen storage element (10), wherein the liquid hydrogen storage element (10) is used to store liquid hydrogen; an evaporation pipe (20), one end of the evaporation pipe (20) being connected to the liquid hydrogen storage element (10); a buffer member (30), the other end of the evaporation pipe (20) being connected to the buffer member (30) so as to supply gaseous hydrogen to the buffer member (30), and the buffer member (30) being used to be connected to the fuel cell (200) so as to supply the gaseous hydrogen to the fuel cell (200); A boost pipeline (40), the boost pipeline (40) having a boost inlet and a boost outlet, the boost inlet being connected to the buffer element (30), and the boost outlet being connected to the liquid hydrogen storage element (10) so as to guide the gaseous hydrogen into the liquid hydrogen storage element.

2. The liquid hydrogen system for a vehicle according to claim 1, characterized in that: The boost pipeline (40) is provided with a hydrogen storage element (43) and a stop valve. The hydrogen storage element (43) is used to store the gaseous hydrogen. The stop valve is provided upstream and / or downstream of the hydrogen storage element (43) to control the flow of the gaseous hydrogen.

3. The liquid hydrogen system for a vehicle according to claim 2, characterized in that: The boosting pipeline (40) is also provided with a pressure stabilizing valve (45), and the pressure stabilizing valve (45) is arranged upstream of the hydrogen storage element (43). The boosting pipeline (40) is also provided with a first proportional valve (46), and the first proportional valve (46) is arranged downstream of the hydrogen storage element (43) to adjust the supply amount of the gaseous hydrogen supplied by the hydrogen storage element (43) to the liquid hydrogen storage element (10).

4. The liquid hydrogen system for a vehicle according to claim 1, characterized in that: The evaporation pipeline (20) is provided with a first evaporator (21) and a second evaporator, and the first evaporator (21) and the second evaporator are arranged in sequence.

5. The liquid hydrogen system for a vehicle according to claim 4, characterized in that: The second evaporator is configured as a water bath evaporator, the water bath evaporator is connected to a medium supply device (23), and the medium supply device (23) 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.

6. The liquid hydrogen system for a vehicle according to claim 5, characterized in that: The medium supply device (23) comprises: A heat dissipation pipeline (231), wherein both ends of the heat dissipation pipeline (231) are respectively connected to the fuel cell (200); A heat sink (232), the heat sink (232) being arranged on the heat dissipation pipe (231) to dissipate heat from the heat exchange medium discharged from the fuel cell (200); wherein: A medium pipeline (233) is provided between the heat sink (232) and the water bath evaporator to guide the heat exchange medium discharged from the heat sink (232) to the water bath evaporator.

7. The liquid hydrogen system for a vehicle according to claim 5, characterized in that: There are a plurality of evaporation pipes (20), and the plurality of evaporation pipes (20) are arranged in parallel.

8. The liquid hydrogen system for a vehicle according to claim 7, characterized in that: A plurality of the water bath evaporators are respectively provided on the plurality of evaporation pipes (20), and the plurality of the 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 the heat exchange medium to the first water bath evaporator (221) and the second water bath evaporator (222), respectively.

9. The liquid hydrogen system for a vehicle according to claim 4, characterized in that: The first evaporator (21) is configured as a steam bath evaporator, wherein the steam bath evaporator is provided with a heat exchange portion, and the heat exchange portion is in contact with the atmospheric environment.

10. A vehicle, characterized in that: A liquid hydrogen system comprising the liquid hydrogen system according to any one of claims 1 to 9.

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