Vehicle-mounted liquid hydrogen storage and supply system and control method

Abstract

The invention relates to a vehicle-mounted liquid hydrogen storage and supply system and a control method, and relates to the technical field of hydrogen energy automobiles, and the vehicle-mounted liquid hydrogen storage and supply system comprises a hydrogen storage bottle used for storing liquid hydrogen; the liquid adding pipeline is communicated with the hydrogen storage bottle, and the liquid adding pipeline is used for filling liquid hydrogen into the hydrogen storage bottle; the output pipeline is communicated with the hydrogen storage bottle, and the output pipeline is used for conveying the liquid hydrogen and the hydrogen in the hydrogen storage bottle to a hydrogen using end; and the hydrogen elimination pipeline comprises a hydrogen elimination pipeline used for discharging hydrogen, the hydrogen elimination pipeline is communicated with the hydrogen storage bottle, and an evaporation valve and a hydrogen catalytic reactor are sequentially arranged on the hydrogen elimination pipeline in the hydrogen conveying direction. Through the arrangement of the hydrogen elimination pipeline, hydrogen can be discharged when the internal pressure of the hydrogen storage bottle is increased, and the hydrogen can be catalyzed to react with oxygen in air when the hydrogen is discharged, so that the hydrogen elimination function is realized, and the potential safety hazard caused by direct discharge of the hydrogen is further reduced.

Description

Technical Field

[0001] The present application relates to the technical field of hydrogen energy vehicles, and in particular to a vehicle-mounted liquid hydrogen storage and supply system and a control method. Background Art

[0002] As a clean energy, liquid hydrogen is widely used in the fields of aerospace and transportation because of its advantages such as wide raw material sources, high energy density, and zero emissions during use. At present, common hydrogen-powered vehicles are mainly heavy trucks. Using hydrogen energy in the field of heavy trucks can effectively reduce the consumption of traditional fossil energy such as diesel and gasoline, reduce dependence on oil, enhance energy self-sufficiency, and improve energy security.

[0003] At present, common on-board liquid hydrogen storage and supply systems mainly include liquid hydrogen storage units, filling systems and liquid hydrogen supply systems; the filling system is used to replenish liquid hydrogen to the liquid hydrogen storage unit, and the liquid hydrogen storage unit is used to replenish liquid hydrogen. The liquid hydrogen storage unit supplies hydrogen gas or liquid hydrogen to the hydrogen user through the liquid hydrogen supply system. The on-board liquid hydrogen storage and supply system realizes the injection, storage and supply of liquid hydrogen through the liquid hydrogen storage unit, filling system and liquid hydrogen supply system.

[0004] Regarding the above-mentioned related technologies, during the life cycle of the vehicle, liquid hydrogen will absorb a large amount of latent heat in the liquid hydrogen storage unit and naturally evaporate to produce gaseous hydrogen. This process is inevitable in the liquid hydrogen storage unit. The gaseous hydrogen produced in this process will cause the internal pressure of the liquid hydrogen storage unit to increase, which may easily cause safety hazards to the entire vehicle. For such problems, the most commonly used method is to directly discharge the gaseous hydrogen in the liquid hydrogen storage unit, but the discharged hydrogen is prone to deflagration or explosion, which means that the vehicle still has a large safety hazard. Summary of the invention

[0005] The present application provides a vehicle-mounted liquid hydrogen storage and supply system and a control method, the purpose of which is to discharge hydrogen after reaction and reduce the safety hazards of hydrogen discharge.

[0006] In the first aspect, the present application provides a vehicle-mounted liquid hydrogen storage and supply system adopts the following technical solution: A vehicle-mounted liquid hydrogen storage and supply system comprises a hydrogen storage bottle for storing liquid hydrogen; a liquid adding pipeline, the liquid adding pipeline is connected to the hydrogen storage bottle, and the liquid adding pipeline is used to add liquid hydrogen to the hydrogen storage bottle; an output pipeline, the output pipeline is connected to the hydrogen storage bottle, and the output pipeline is used to transport the liquid hydrogen and hydrogen in the hydrogen storage bottle to a hydrogen use end; a hydrogen elimination pipeline, the hydrogen elimination pipeline comprises a hydrogen elimination pipeline for discharging hydrogen, the hydrogen elimination pipeline is connected to the hydrogen storage bottle, and an evaporation valve and a hydrogen catalytic reactor are sequentially arranged on the hydrogen elimination pipeline along the hydrogen transportation direction.

[0007] By adopting the above technical solution, the liquid adding pipeline, hydrogen storage bottle and output pipeline are arranged in coordination, the liquid adding pipeline allows liquid hydrogen to be injected into the hydrogen storage bottle, and the output pipeline can discharge the liquid hydrogen in the hydrogen storage bottle, which enables the hydrogen and liquid hydrogen in the hydrogen storage tube to be supplied to the hydrogen user end. On the one hand, the liquid adding pipeline, hydrogen storage bottle and output pipeline cooperate to meet the function of the on-board liquid hydrogen storage and supply system, and can supply hydrogen to the hydrogen user end; on the other hand, the output pipeline can output liquid hydrogen and hydrogen, which can reduce the internal pressure of the hydrogen storage tube, reduce the amount of hydrogen that needs to be discharged, and thus reduce safety hazards.

[0008] The hydrogen storage bottle is connected to a hydrogen consumption pipeline, which is arranged through the hydrogen consumption pipeline and the evaporation valve and hydrogen catalytic reactor arranged on the hydrogen consumption pipeline. When the internal pressure of the hydrogen storage bottle rises and the hydrogen needs to be discharged, the steam valve opens automatically. At this time, the hydrogen is discharged into the hydrogen catalytic reactor. The hydrogen catalytic reactor automatically catalyzes the reaction of hydrogen with oxygen in the air to generate water and heat, which can effectively reduce the safety hazards caused by the discharge of hydrogen.

[0009] Optionally, the opening pressure of the evaporation valve is less than the maximum working pressure of the hydrogen storage bottle.

[0010] By adopting the above technical solution, since the opening pressure of the evaporation valve is less than the maximum working pressure of the hydrogen storage bottle, the hydrogen removal pipeline can continue to work and continuously remove hydrogen, thereby avoiding direct discharge of hydrogen.

[0011] Optionally, the output pipeline includes a liquid phase pipe group, a boost pipe group, a gas phase pipe group, a hydrogen supply pipe group and a first-level water bath vaporizer; the gas phase pipe group and the liquid phase pipe group both pass through the first-level water bath vaporizer; the hydrogen storage bottle, the gas phase pipe group and the hydrogen supply pipe group are connected in sequence; the hydrogen storage bottle, the liquid phase pipe group, the boost pipe group and the gas phase pipe group are connected in sequence, the boost pipe group extends into the hydrogen storage bottle, and the boost pipe group is used for heat exchange with liquid hydrogen in the hydrogen storage bottle.

[0012] By adopting the above technical solution, the output pipeline is arranged through the coordination of the gas phase pipe group and the first-level water bath vaporizer, so that the gas phase pipe group can pass the low-temperature hydrogen in the hydrogen storage bottle into the hydrogen supply pipe group, and then the hydrogen supply pipe group supplies hydrogen to the hydrogen user end. In the process of the gas phase pipe group transporting the low-temperature hydrogen, the low-temperature hydrogen passes through the first-level water bath vaporizer, and the first-level water bath vaporizer heats the low-temperature hydrogen to raise the temperature of the hydrogen user end, which can raise the temperature of the hydrogen to the required temperature of the hydrogen user end, so that the hydrogen supplied by the hydrogen supply pipe group can meet the requirements of the hydrogen user end.

[0013] Therefore, the coordinated arrangement of the gas phase pipe group and the first-stage water bath vaporizer can realize the transportation of gaseous hydrogen in the hydrogen storage bottle.

[0014] The output pipeline is arranged through the coordination of the liquid phase pipe group, the boost pipe group, the gas phase pipe group and the first-level water bath vaporizer. Since the liquid hydrogen in the hydrogen storage bottle can be output through the liquid phase pipe group, and the liquid phase pipe group passes through the first-level water bath vaporizer, the first-level water bath vaporizer vaporizes and heats the liquid hydrogen transported in the liquid phase pipe group, and the heated hydrogen will enter the boost pipe group. Since the boost pipe extends into the hydrogen storage bottle and can perform heat exchange with the liquid hydrogen in the hydrogen storage bottle, the heated hydrogen enters the boost pipe group and performs heat exchange with the liquid hydrogen in the hydrogen storage bottle. At this time, the liquid hydrogen in the hydrogen storage bottle is heated and vaporized, and the internal pressure of the hydrogen storage bottle increases, which makes the hydrogen in the hydrogen storage bottle stably output from the gas phase pipeline. The hydrogen after heat exchange in the boost pipe group is input into the gas phase pipeline. At this time, the hydrogen input into the gas phase pipeline in the boost pipe group merges with the hydrogen input into the gas phase pipeline in the hydrogen storage bottle. After merging, the hydrogen passes through the first-level water bath vaporizer and is input into the hydrogen supply pipe group.

[0015] Therefore, the cooperation of the liquid phase tube group, the booster tube group, the gas phase tube group and the first-level water bath vaporizer can, on the one hand, vaporize and heat the liquid hydrogen in the hydrogen storage bottle and output it to the hydrogen supply tube group, thereby supplying hydrogen to the hydrogen-using end; on the other hand, the cooperation of the liquid phase tube group, the booster tube group and the first-level water bath vaporizer can adjust the internal pressure of the hydrogen bottle to ensure the stable output of the hydrogen in the hydrogen storage bottle.

[0016] Optionally, the output pipeline also includes a switching tube group, and the hydrogen storage bottle, the liquid phase tube group, the switching tube group and the hydrogen supply tube group are connected in sequence; the switching tube group includes a switching pipe, and a boost solenoid valve is provided on the switching pipe, and both ends of the switching pipe are respectively connected to the liquid phase tube group and the hydrogen supply tube group.

[0017] By adopting the above technical solution, the switching tube group is arranged through the coordination of the switching pipeline and the boost solenoid valve. Since the hydrogen storage bottle, the liquid phase tube group, the switching tube group and the hydrogen supply tube group are connected in sequence, the liquid oxygen in the hydrogen storage bottle can be directly input into the hydrogen supply tube group through the liquid phase tube group and the switching tube group.

[0018] By controlling the boost solenoid valve, the switching pipeline can be opened or closed, and the hydrogen output from the liquid phase pipe group can be switched to enter the boost pipe group or the switching pipe group, thereby controlling the opening or closing of the boost function.

[0019] Optionally, the liquid phase pipe group includes a liquid phase pipeline, one end of which is connected to the hydrogen storage bottle, and the other end is connected to the boost pipe group; a liquid outlet solenoid valve and a sheet-wound vaporizer are provided on the liquid phase pipeline, and the liquid outlet solenoid valve, the sheet-wound vaporizer and the first-level water bath vaporizer are arranged in sequence along the hydrogen transport direction in the liquid phase pipeline.

[0020] By adopting the above technical scheme, the liquid phase pipe group is equipped with the liquid phase pipeline, the liquid outlet solenoid valve and the winding vaporizer. The liquid phase pipeline can discharge the liquid hydrogen in the hydrogen storage bottle, and the liquid outlet solenoid valve controls the opening and closing of the liquid phase pipeline. The winding vaporizer vaporizes the liquid hydrogen, which can share the vaporization heating pressure of the first-level water bath vaporizer, thereby satisfying the function of the liquid phase pipe group.

[0021] Optionally, the boost pipe group includes a boost pipe, one end of the boost pipe is connected to the liquid phase pipe group, and the other end is connected to the gas phase pipe group; the boost pipe group is provided with a secondary water bath vaporizer, a boost regulating valve and a heat exchange plate, the secondary water bath vaporizer, the boost regulating valve and the heat exchange plate are arranged in sequence along the hydrogen transport direction in the boost pipe, and the heat exchange plate is located in the hydrogen storage bottle.

[0022] By adopting the above technical solution, the booster pipe group is equipped with a booster pipe, a secondary water bath vaporizer, a booster regulating valve and a heat exchanger. The booster pipe can input the hydrogen output from the liquid phase pipe group into the gas phase pipe group. In this process, the hydrogen will pass through the secondary water bath vaporizer, the booster regulating valve and the heat exchanger in sequence. The secondary water bath vaporizer heats up the hydrogen twice. When the heated hydrogen passes through the booster regulator, the booster regulator converts the hydrogen into a hydrogen flow with a limited pressure. The hydrogen flow enters the heat exchanger in the hydrogen storage bottle. At this time, the hydrogen flow exchanges heat with the liquid hydrogen in the hydrogen storage bottle, and the liquid hydrogen in the hydrogen storage bottle is heated and gasified, thereby increasing the gas pressure in the hydrogen storage bottle. The hydrogen flow after the heat exchange is completed is transported to the gas phase pipe group. This can realize the function of the booster pipe group.

[0023] Optionally, it also includes an external exhaust pipeline, which includes a first-level exhaust pipe for exhausting hydrogen, the first-level exhaust pipe is connected to the hydrogen storage bottle, and a first-level safety valve is provided on the first-level exhaust pipe, and the opening pressure of the first-level safety valve is greater than the maximum working pressure of the hydrogen storage bottle.

[0024] By adopting the above technical solution, the external discharge pipeline is arranged through the coordination of the first-level exhaust pipe and the first-level safety valve. When the internal pressure of the hydrogen storage bottle exceeds the first-level safety valve, the first-level safety valve opens. At this time, the gas in the hydrogen storage bottle is discharged through the first-level exhaust pipe to achieve primary pressure relief.

[0025] Optionally, the external exhaust pipeline also includes a secondary exhaust pipe for exhausting hydrogen, the secondary exhaust pipe is connected to the hydrogen storage bottle, and a secondary safety valve is provided on the secondary exhaust pipe, and the opening pressure of the secondary safety valve is greater than the opening pressure of the primary safety valve.

[0026] By adopting the above technical solution, the external discharge pipeline is arranged through the coordination of the secondary emptying pipe and the secondary safety valve. When the hydrogen discharge speed of the primary emptying pipe is slow, the internal pressure of the hydrogen storage bottle will still increase. When the internal pressure of the hydrogen storage bottle exceeds the opening pressure of the secondary safety valve, the primary emptying pipe and the secondary emptying pipe work at the same time to realize the hydrogen discharge function.

[0027] Optionally, the external exhaust pipeline also includes a manual exhaust pipe for exhausting hydrogen, the manual exhaust pipe is connected to the hydrogen storage bottle, and a manual exhaust valve is provided on the manual exhaust pipe.

[0028] By adopting the above technical solution, the external discharge pipeline is equipped with a manual drain pipe and a manual drain valve. Under special circumstances, the manual drain valve can be actively opened to discharge the hydrogen in the hydrogen storage bottle.

[0029] In the second aspect, the present application provides a control method for a vehicle-mounted liquid hydrogen storage and supply system using the following technical solution: A control method for a vehicle-mounted liquid hydrogen storage and supply system, used for controlling the above-mentioned vehicle-mounted liquid hydrogen storage and supply system, comprises the following steps: Install a plurality of temperature sensors, a plurality of pressure sensors and a plurality of hydrogen concentration sensors on the liquid adding pipeline and the output pipeline; Filling liquid hydrogen into the hydrogen storage bottle through the liquid filling pipeline, and transporting the liquid hydrogen and hydrogen gas in the hydrogen storage bottle to the hydrogen use end through the output pipeline; The detection data of all temperature sensors, pressure sensors and hydrogen concentration sensors are acquired in real time, and the detection data of all temperature sensors, pressure sensors and hydrogen concentration sensors are monitored. When the detection data of the temperature sensor, pressure sensor or hydrogen concentration sensor is abnormal, the output pipeline and the output pipeline are closed.

[0030] By adopting the above technical solution, after adjusting the opening pressure of the hydrogen elimination pipeline, the hydrogen elimination pipeline can automatically realize the hydrogen elimination function, effectively reducing the safety hazards of hydrogen discharge. In the process of hydrogen storage bottle outputting hydrogen and liquid hydrogen to the outside, by monitoring the detection data of temperature sensor, pressure sensor and hydrogen concentration sensor, it is possible to close the output pipeline and output pipeline in time when problems occur, thereby realizing the protection of the entire on-board liquid hydrogen storage and supply system. Therefore, through the above technical solution, the normal safety of the entire on-board liquid hydrogen storage and supply system can be improved and safety hazards can be reduced.

[0031] In summary, the present application includes at least one of the following beneficial technical effects: 1. This application, through the setting of a hydrogen elimination pipeline, can discharge hydrogen when the internal pressure of the hydrogen storage bottle increases, and when discharging hydrogen, it will catalyze the hydrogen to react with oxygen in the air to achieve the hydrogen elimination function, thereby reducing the safety hazards caused by direct discharge of hydrogen.

[0032] 2. This application can discharge the hydrogen in the hydrogen storage bottle by setting up an external exhaust pipeline, thereby improving the safety of the hydrogen storage bottle.

[0033] 3. The present application can discharge the liquid hydrogen and hydrogen gas in the hydrogen storage bottle through the structural setting of the output pipeline. During this process, the internal pressure of the hydrogen storage bottle can be automatically adjusted to ensure the stable output of the hydrogen gas in the hydrogen storage bottle.

[0034] 4. The present application, through the setting of a first-stage water bath vaporizer, can increase the temperature of the output hydrogen to the temperature required by the hydrogen-using end, thereby improving the quality of the hydrogen output by the on-board liquid hydrogen storage and supply system of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the overall structure of the on-board liquid hydrogen storage and supply system of the present application.

[0036] Figure 2 It is a schematic diagram of the overall structure of the hydrogen consumption pipeline and the external exhaust pipeline of the present application.

[0037] Figure 3 It is a schematic diagram of the overall structure of the filling pipeline of this application.

[0038] Figure 4 It is a schematic diagram of the overall structure of the hydrogen storage bottle, liquid phase pipe group, booster pipe group, gas phase pipe group, first-level water bath vaporizer and hydrogen supply pipe group of the present application.

[0039] Figure 5 It is a schematic diagram of the overall structure of the hydrogen storage bottle, gas phase pipe group, first-level water bath vaporizer and hydrogen supply pipe group of the present application.

[0040] Figure 6 It is a schematic diagram of the overall structure of the output pipeline of this application.

[0041] In the figure, 1, hydrogen storage bottle; 2, liquid filling pipeline; 21, filling port; 22, filling pipe; 23, liquid inlet stop valve; 24, filling one-way valve; 25, nitrogen port; 26, nitrogen pipe; 27, nitrogen replacement valve; 3, output pipeline; 31, liquid phase pipe group; 311, liquid phase pipeline; 312, liquid outlet one-way valve; 313, liquid outlet solenoid valve; 314, first temperature sensor; 315, winding vaporizer; 316, second temperature sensor; 32, booster pipe group; 321, booster pipeline; 322, third temperature sensor; 323, secondary water bath vaporizer; 324, fourth temperature sensor; 325, boost regulating valve; 326, heat exchange plate; 327, boost one-way valve; 33, gas phase pipe group; 331, gas phase pipeline; 332, economic regulating valve; 333, fifth temperature sensor temperature sensor; 34, hydrogen supply pipe group; 341, hydrogen supply pipeline; 342, sixth temperature sensor; 343, buffer tank; 344, hydrogen supply solenoid valve; 345, seventh temperature sensor; 346, pressure regulating valve; 347, second pressure sensor; 35, first-level water bath vaporizer; 351, eighth temperature sensor; 352, ninth temperature sensor; 36, switching pipe group; 361, switching pipeline; 362, boosting solenoid valve; 4, hydrogen removal pipeline; 41, hydrogen removal pipeline; 42, evaporation valve; 43, hydrogen catalytic reactor; 44, hydrogen removal pressure sensor; 5, external exhaust pipeline; 51, first-level emptying pipeline; 52, first-level safety valve; 53, second-level emptying pipeline; 54, second-level safety valve; 55, manual emptying pipeline; 56, manual emptying valve; 57, first pressure sensor. DETAILED DESCRIPTION

[0042] The following is combined with Figure 1 -Attached Figure 6 , further details of this application are given.

[0043] A vehicle-mounted liquid hydrogen storage and supply system, referring to the figure, includes a hydrogen storage bottle 1, a liquid adding pipeline 2, an output pipeline 3, a hydrogen elimination pipeline 4 and an external discharge pipeline 5. The liquid adding pipeline 2, the hydrogen storage bottle 1 and the output pipeline 3 are connected in sequence, and the hydrogen elimination pipeline 4 and the external discharge pipeline 5 are both connected to the hydrogen storage bottle 1.

[0044] The liquid filling pipeline 2 realizes the liquid hydrogen filling function of the hydrogen storage bottle 1, the hydrogen storage bottle 1 realizes the liquid hydrogen storage function, and the output pipeline 3 transports the hydrogen and liquid hydrogen in the hydrogen storage bottle 1 to the hydrogen use end, which meets the basic functions of the on-board liquid hydrogen storage and supply system. The hydrogen consumption pipeline 4 and the external exhaust pipeline 5 both realize the external exhaust of the hydrogen in the hydrogen storage bottle 1 to ensure the safety of the hydrogen storage bottle 1.

[0045] Reference Figure 2 The hydrogen removal pipeline 4 includes a hydrogen removal pipeline 41, one end of which is connected to the hydrogen storage bottle 1, and the other end is connected to the atmosphere. The hydrogen removal pipeline 41 is sequentially provided with an evaporation valve 42 and a hydrogen catalytic reactor 43 along its own hydrogen transport direction.

[0046] In this embodiment, the opening pressure of the evaporator valve 42 is less than the maximum working pressure of the hydrogen storage bottle 1, so that during the operation of the on-board liquid hydrogen storage and supply system, the hydrogen in the hydrogen storage bottle 1 can be continuously discharged into the hydrogen catalytic reactor 43. The hydrogen catalytic reactor 43 catalyzes the reaction of hydrogen with oxygen in the air to generate water and heat, which can prevent the hydrogen from being directly discharged.

[0047] In this embodiment, refer to Figure 2 A hydrogen removal pressure sensor 44 is also provided on the hydrogen removal pipeline 41, and along the hydrogen transportation method in the hydrogen removal pipeline 41, the hydrogen removal pressure sensor 44 is located between the evaporation valve 42 and the hydrogen storage bottle 1. The hydrogen removal pressure sensor 44 can detect the internal pressure at the corresponding position of the hydrogen removal pipeline 41, and then monitor the operation of the hydrogen removal pipeline 4.

[0048] Reference Figure 2 The external exhaust pipeline 5 includes a primary exhaust pipe 51 , one end of which is connected to the hydrogen storage bottle 1 , and the other end is connected to the atmosphere, and a primary safety valve 52 is provided on the primary exhaust pipe 51 .

[0049] In this embodiment, the opening pressure of the primary safety valve 52 is not greater than 1.1 times the maximum working pressure of the hydrogen storage bottle 1. When the internal pressure of the hydrogen storage bottle 1 exceeds the primary safety valve 52, the primary safety valve 52 opens, and the gas in the hydrogen storage bottle 1 is discharged through the primary exhaust pipe 51 to achieve pressure relief.

[0050] Reference Figure 2 The external exhaust pipeline 5 also includes a secondary exhaust pipe 53, one end of the secondary exhaust pipe 53 is connected to the hydrogen storage bottle 1, and the other end is connected to the atmosphere, and a secondary safety valve 54 is provided on the secondary exhaust pipe 53.

[0051] In this embodiment, the opening pressure of the secondary safety valve 54 is not greater than 1.36 times the maximum working pressure of the hydrogen storage bottle 1. When the primary exhaust pipe 51 discharges hydrogen slowly, the internal pressure of the hydrogen storage bottle 1 will continue to increase, and eventually cause the secondary safety valve 54 to open. At this time, the primary exhaust pipe 51 and the secondary exhaust pipe 53 work simultaneously to realize the hydrogen exhaust function, ensuring that the internal pressure of the hydrogen storage bottle 1 can be quickly reduced.

[0052] Reference Figure 2 The external discharge pipeline 5 also includes a manual emptying pipeline 55 , one end of the manual emptying pipeline 55 is connected to the hydrogen storage bottle 1 , and the other end is connected to the atmosphere. A manual emptying valve 56 is provided on the manual emptying pipeline 55 .

[0053] The manual drain valve 56 is provided so that, under special circumstances, the manual drain pipe 55 can be opened manually to thereby realize the hydrogen discharge function.

[0054] In this embodiment, a first pressure sensor 57 is further provided on the manual emptying pipe 55, and the first pressure sensor 57 and the manual emptying valve 56 are sequentially arranged at intervals along the hydrogen delivery direction in the manual emptying pipe 55. The first pressure sensor 57 is used to monitor the internal pressure of the hydrogen storage bottle 1.

[0055] Reference Figure 3 The filling pipeline 2 includes a filling port 21 and a filling pipe 22. One end of the filling pipe 22 is connected to the filling port 21, and the other end is connected to the hydrogen storage bottle 1. In addition, a liquid inlet stop valve 23 and a liquid filling check valve 24 are sequentially arranged on the filling pipe 22 along its own hydrogen delivery direction.

[0056] Reference Figure 3 The liquid filling pipeline 2 also includes a nitrogen port 25 and a nitrogen pipe 26. One end of the nitrogen pipe 26 is connected to the nitrogen port 25, and the other end is connected to the filling pipe 22. The connection between the nitrogen pipe 26 and the filling pipe 22 is located between the filling port 21 and the liquid inlet stop valve 23 along the hydrogen transportation direction in the filling pipe 22. A nitrogen replacement valve 27 is provided on the nitrogen pipe 26.

[0057] Before filling the hydrogen storage bottle 1 with liquid hydrogen, connect the nitrogen source to the nitrogen port 25, open the nitrogen replacement valve 27, and then the nitrogen source fills the filling pipe 22 with nitrogen. The nitrogen purges the filling pipe 22 to prevent the oxygen or air in the filling pipe 22 from contacting with the liquid hydrogen and causing a dangerous reaction when filling the liquid hydrogen, thereby ensuring the safety of the liquid filling process. After the purge is completed, close the nitrogen replacement valve 27, connect the liquid hydrogen source to the filling port 21, open the liquid inlet stop valve 23, and then the liquid hydrogen in the liquid hydrogen source is filled into the hydrogen storage bottle 1.

[0058] In this embodiment, a liquid level sensor is provided in the hydrogen storage bottle 1 , and the liquid level sensor can detect the amount of liquid hydrogen in the hydrogen storage bottle 1 in real time.

[0059] Reference Figure 1 The output pipeline 3 includes a liquid phase pipe group 31, a boost pipe group 32, a gas phase pipe group 33, a switching pipe group 36, a hydrogen supply pipe group 34, a switching pipe group 36 and a primary water bath vaporizer 35.

[0060] Reference Figure 4 and Figure 5 The hydrogen storage bottle 1, the liquid phase pipe group 31, the booster pipe group 32, the gas phase pipe group 33 and the hydrogen supply pipe group 34 are connected in sequence, and the liquid phase pipe group 31 and the gas phase pipe group 33 both pass through the first-level water bath vaporizer 35.

[0061] Reference Figure 4 The liquid phase pipe group 31 includes a liquid phase pipeline 311, one end of the liquid phase pipeline 311 is connected to the hydrogen storage bottle 1, and the other end is connected to the booster pipe group 32, and the liquid phase pipeline 311 passes through the first-level water bath vaporizer 35.

[0062] Under the action of the liquid phase pipe group 31, the liquid hydrogen in the hydrogen storage bottle 1 is transported to the booster pipe group 32 along the liquid phase pipeline 311, and during this process, the first-level water bath vaporizer can vaporize and heat the liquid hydrogen in the liquid phase pipeline 311.

[0063] Reference Figure 4 The liquid phase pipeline 311 is provided with a liquid outlet one-way valve 312, a liquid outlet solenoid valve 313, a first temperature sensor 314, a sheet-wound vaporizer 315 and a second temperature sensor 316, and the liquid outlet one-way valve 312, the liquid outlet solenoid valve 313, the first temperature sensor 314, the sheet-wound vaporizer 315, the second temperature sensor 316 and the first-level water bath vaporizer 35 are arranged in sequence along the hydrogen transport direction in the liquid phase pipeline 311.

[0064] During the transportation process of hydrogen in the liquid phase pipeline 311, the liquid hydrogen is discharged from the hydrogen storage bottle 1 and enters the wound vaporizer 315. At this time, the wound vaporizer 315 vaporizes the liquid hydrogen into hydrogen, and then the hydrogen enters the first-level water bath vaporizer 35. The first-level water bath vaporizer 35 can increase the temperature of the hydrogen, and the hydrogen with increased temperature is transported to the booster pipe group 32.

[0065] The liquid outlet one-way valve 312 is provided to prevent the liquid hydrogen from flowing back into the hydrogen storage bottle 1. The liquid outlet solenoid valve 313 is provided to control the opening and closing of the liquid phase pipeline 311.

[0066] The first temperature sensor 314 is configured to detect the temperature of liquid hydrogen in the input wafer vaporizer 315, and the second temperature sensor 316 is configured to detect the temperature of hydrogen output from the wafer vaporizer 315. The vaporization capacity of the wafer vaporizer 315 can be evaluated through the detection results of the first temperature sensor 314 and the second temperature sensor 316.

[0067] Reference Figure 4 and Figure 5 The boost pipe group 32 includes a boost pipe 321 , one end of the boost pipe 321 is connected to the liquid phase pipe 311 , and the other end is connected to the gas phase pipe group 33 .

[0068] Under the action of the boosting pipe group 32 , after the hydrogen output from the liquid phase pipeline 311 enters the boosting pipe 321 , the hydrogen is output to the gas phase pipe group 33 along the boosting pipe 321 .

[0069] Reference Figure 4 and Figure 5 A third temperature sensor 322, a secondary water bath vaporizer 323, a fourth temperature sensor 324, a boost regulating valve 325, a heat exchange disk 326 and a boost check valve 327 are sequentially arranged on the boost pipeline 321 along its own hydrogen delivery direction, and the heat exchange disk 326 is arranged in the hydrogen storage bottle 1.

[0070] During the process of hydrogen transportation in the boosting pipeline 321, the hydrogen will first pass through the secondary water bath vaporizer 323, and the secondary water bath vaporizer 323 will perform secondary heating on the hydrogen; when the heated hydrogen passes through the boost regulating valve 325, the boost regulating valve 325 converts the hydrogen into a hydrogen flow with a limited pressure; the hydrogen flow enters the heat exchange disk 326 in the hydrogen storage bottle 1, at which time the hydrogen flow exchanges heat with the liquid hydrogen in the hydrogen storage bottle 1, and the liquid hydrogen in the hydrogen storage bottle 1 is heated and vaporized, thereby increasing the gas pressure in the hydrogen storage bottle 1; the hydrogen flow after the heat exchange is completed is transported to the gas phase pipe group 33.

[0071] Reference Figure 4 The third temperature sensor 322 is set to detect the temperature of the hydrogen input to the secondary water bath vaporizer 323. The fourth temperature sensor 324 is set to detect the temperature of the hydrogen output from the secondary water bath vaporizer 323. The capacity of the secondary water bath vaporizer 323 can be evaluated through the detection results of the third temperature sensor 322 and the fourth temperature sensor 324.

[0072] Reference Figure 4 and Figure 5 The setting of the boost check valve 327 allows hydrogen to be transported from the boost pipe 321 to the gas phase pipe group 33 in one direction, preventing hydrogen from flowing back.

[0073] Reference Figure 5 The gas phase pipe group 33 includes a gas phase pipeline 331, one end of the gas phase pipeline 331 is connected to the hydrogen storage bottle 1, and the other end is connected to the hydrogen supply pipe group 34.

[0074] Reference Figure 5 An economic regulating valve 332 and a fifth temperature sensor 333 are provided on the gas phase pipeline 331, and the gas phase pipeline 331 passes through the first-level water bath vaporizer 35. The economic regulating valve 332, the fifth temperature sensor 333 and the first-level water bath vaporizer 35 are arranged in sequence along the hydrogen transportation direction in the gas phase pipeline 331.

[0075] Under the action of the gas phase pipe group 33, the hydrogen in the hydrogen storage bottle 1 will be transported to the hydrogen supply pipe group 34 through the gas phase pipeline 331. In this process, after the hydrogen is discharged from the hydrogen storage bottle 1, it will pass through the economic regulating valve 332, and the economic regulating valve 332 will convert the hydrogen into a hydrogen flow with stable pressure, and then the hydrogen flow will enter the primary water bath vaporizer 35, and the primary water bath vaporizer 35 can increase the temperature of the hydrogen, and the heated hydrogen will be transported to the hydrogen supply pipe group 34.

[0076] Reference Figure 4 and Figure 5 The boost pipeline 321 is connected to the gas phase pipeline 331 , and the connection between the gas phase pipeline 331 and the boost pipeline 321 is located between the economic regulating valve 332 and the fifth temperature sensor 333 along the hydrogen transportation direction in the gas phase pipeline 331 .

[0077] The hydrogen flow in the hydrogen storage bottle 1 passes through the economic regulating valve 332 and merges with the hydrogen flow in the boosting pipeline 321, and the merged hydrogen flow enters the first-level water bath vaporizer 35 together, and the fifth temperature sensor 333 can detect the temperature of the hydrogen flow gathered by the gas phase pipeline 331 and the boosting pipeline 321.

[0078] Reference Figure 4 and Figure 5 Through the cooperation of the liquid phase pipe group 31, the boost pipe group 32 and the gas phase pipe group 33, the liquid phase pipe group 31 vaporizes and heats the liquid hydrogen in the hydrogen storage bottle 1; the boost pipe group 32 uses the heated hydrogen to heat the liquid hydrogen in the hydrogen storage bottle 1, so that the liquid hydrogen in the hydrogen storage bottle 1 is vaporized, and the internal pressure of the hydrogen storage bottle 1 is increased, so that the low-temperature hydrogen in the hydrogen storage bottle 1 can be automatically discharged from the gas phase pipeline 331; the low-temperature hydrogen automatically discharged from the hydrogen storage bottle 1 and the hydrogen after heat exchange by the boost pipe group 32 are merged in the gas phase pipe group 33, and are passed into the first-level water bath vaporizer 35 for heating, so that the hydrogen can be heated to the required temperature, and finally the hydrogen is discharged to the hydrogen supply pipe group 34.

[0079] With the cooperation of the liquid phase pipe group 31, the gas phase pipe group 33 and the booster pipe group 32, the internal pressure in the hydrogen storage bottle 1 can be increased to ensure that the gaseous hydrogen in the hydrogen storage bottle 1 can be stably output.

[0080] Reference Figure 5 The hydrogen supply pipe group 34 includes a hydrogen supply pipeline 341, one end of the hydrogen supply pipeline 341 is connected to the gas phase pipeline 331, and the other end is connected to the hydrogen end.

[0081] Reference Figure 5 A sixth temperature sensor 342 , a buffer tank 343 , a hydrogen supply solenoid valve 344 , a seventh temperature sensor 345 , a pressure regulating valve 346 and a second pressure sensor 347 are sequentially arranged on the hydrogen supply pipeline 341 along its own hydrogen delivery direction.

[0082] Reference Figure 5 Under the action of the hydrogen supply pipeline 341, the hydrogen output from the gas phase pipeline 331 will enter the buffer tank 343 for temporary storage. After the hydrogen supply solenoid valve 344 is opened, the hydrogen temporarily stored in the buffer tank 343 will be output to the hydrogen use end through the hydrogen supply solenoid valve 344 and the pressure regulating valve 346 in sequence, wherein the pressure regulating valve 346 is used to adjust the hydrogen pressure output from the hydrogen supply pipeline 341.

[0083] Reference Figure 5 The sixth temperature sensor 342 can detect the temperature of the hydrogen input into the hydrogen supply pipe 341. Then, with the cooperation of the fifth temperature sensor 333 and the sixth temperature sensor 342, the temperature of the hydrogen before and after passing through the first-stage water bath vaporizer 35 can be determined, thereby evaluating the capacity of the first-stage water bath vaporizer 35.

[0084] Reference Figure 5 The seventh temperature sensor 345 can detect the temperature of hydrogen leading to the hydrogen-using end, and the second pressure sensor 347 can detect the pressure of hydrogen leading to the hydrogen-using end.

[0085] Reference Figure 6 The water inlet of the first-stage water bath vaporizer 35 is provided with an eighth temperature sensor 351, and the water outlet of the first-stage water bath vaporizer 35 is provided with a ninth temperature sensor 352. The eighth temperature sensor 351 can detect the temperature of the heating medium before it is input into the first-stage water bath vaporizer 35, and the ninth temperature sensor 352 can detect the temperature of the heating medium when it is output from the first-stage water bath vaporizer 35, so that the capacity of the first-stage water bath vaporizer 35 can be evaluated.

[0086] Reference Figure 5 and Figure 6 The output pipeline 3 also includes a switching pipe group 36, which includes a switching pipe 361. A boost solenoid valve 362 is provided on the switching pipe 361. One end of the switching pipe 361 is connected to the liquid phase pipe 311 and the boost pipe 321, and the other end is connected to the hydrogen supply pipe 341.

[0087] When the boost solenoid valve 362 is opened, the liquid hydrogen in the hydrogen storage bottle 1 is transported to the hydrogen supply pipe assembly 34 in the following two ways: The first hydrogen supply method: refer to Figure 4 and Figure 6 When the boost solenoid valve 362 is closed, the switching pipeline 361 is closed. At this time, the hydrogen in the liquid phase pipeline 311 is transported to the hydrogen supply pipeline 341 through the boost pipeline 321 and the gas phase pipeline 331 in sequence, and then supplies gas to the hydrogen-using end.

[0088] The second hydrogen supply method: refer to 5 and Figure 6 When the boost solenoid valve 362 is opened, the liquid phase pipeline 311 is connected to the hydrogen supply pipeline 341 through the switching pipeline 361. At this time, the hydrogen in the liquid phase pipeline 311 is directly transported to the hydrogen supply pipeline 341, thereby supplying gas to the hydrogen-using end.

[0089] In addition, the on-board liquid hydrogen storage and supply system also includes a number of hydrogen concentration sensors, which are distributed and installed on the corresponding vehicles and various pipelines and equipment in the on-board liquid hydrogen storage and supply system. The hydrogen concentration sensor can detect the hydrogen concentration and prevent hydrogen leakage from causing the hydrogen concentration to reach the possibility of deflagration or explosion, thereby improving the safety of the on-board liquid hydrogen storage and supply system.

[0090] The implementation principle of the embodiment of the present application is: when liquid hydrogen needs to be added to the hydrogen storage bottle 1, the nitrogen source is connected to the nitrogen port 25, and the filling pipe 22 is purged with nitrogen. After the purging is completed, the liquid hydrogen source is connected to the filling port 21. At this time, liquid hydrogen is injected into the hydrogen storage bottle 1 through the filling pipe 22, thereby realizing the filling function of liquid hydrogen in the hydrogen storage bottle 1.

[0091] When the hydrogen storage bottle 1 delivers liquid hydrogen toward the hydrogen-using end, the internal pressure of the hydrogen storage bottle 1 is detected, and the internal pressure of the hydrogen storage bottle 1 is compared with the set internal pressure.

[0092] When the internal pressure of the hydrogen storage bottle 1 is lower than the set internal pressure, the boost solenoid valve 362 closes the switching pipe 361. At this time, the liquid hydrogen in the hydrogen storage bottle 1 is transported to the hydrogen supply pipe group 34 through the liquid phase pipe group 31, the first-level water bath vaporizer 35, the boost pipe group 32, the gas phase pipe group 33 and the first-level water bath vaporizer 35 in sequence, and the gaseous hydrogen in the hydrogen storage bottle 1 is transported to the hydrogen supply pipe group 34 through the gas phase pipe group 33 and the first-level water bath vaporizer 35 in sequence, and then the hydrogen supply pipe group 34 supplies hydrogen to the hydrogen using end.

[0093] When the internal pressure of the hydrogen storage bottle 1 is higher than the set internal pressure, the boost solenoid valve 362 opens the switching pipe 361. At this time, the liquid hydrogen in the hydrogen storage bottle 1 is transported to the hydrogen supply pipe group 34 through the liquid phase pipe group 31, the first-level water bath vaporizer 35 and the switching pipe 361 in sequence, and the gaseous hydrogen in the hydrogen storage bottle 1 is transported to the hydrogen supply pipe group 34 through the gas phase pipe group 33 and the first-level water bath vaporizer 35 in sequence, and then the hydrogen supply pipe 341 supplies hydrogen to the hydrogen use end, and then the hydrogen supply pipe group 34 supplies hydrogen to the hydrogen use end.

[0094] When hydrogen storage bottle 1 is filled with liquid hydrogen or hydrogen is supplied to the hydrogen end, hydrogen elimination pipeline 4 works normally, and hydrogen in hydrogen storage bottle 1 continuously enters hydrogen catalytic reactor 43, catalyzing hydrogen to react with oxygen in the air to generate water and heat, solving the problem of hydrogen being directly discharged into the atmosphere. External discharge pipeline 5 works normally, and when the internal pressure of hydrogen storage bottle 1 is too high, primary emptying pipeline 51 and secondary emptying pipeline 53 can be automatically opened to discharge hydrogen; manual emptying pipeline 55 can be manually opened to discharge hydrogen.

[0095] This embodiment also discloses a control method for a vehicle-mounted liquid hydrogen storage and supply system, comprising the following steps: The opening pressures of the evaporation valve 42, the primary safety valve 52 and the secondary safety valve 54 are adjusted.

[0096] Specifically, the opening pressure of the steam valve is adjusted to be less than the maximum working pressure of the hydrogen storage valve, the opening pressure of the first-level safety valve is less than 1.1 times the maximum working pressure of the hydrogen storage valve, and the opening pressure of the second-level safety valve is less than 1.36 times the maximum working pressure of the hydrogen storage valve. Ensure that the hydrogen removal pipeline 4 can work continuously and the external exhaust pipeline 5 can protect the on-board liquid hydrogen storage and supply system.

[0097] A plurality of temperature sensors, a plurality of pressure sensors and a plurality of hydrogen concentration sensors are installed on the liquid adding pipeline 2, the output pipeline 3, the hydrogen eliminating pipeline 4 and the external exhaust pipeline 5.

[0098] Specifically, the entire on-board liquid hydrogen storage and supply system is monitored in real time through the cooperation of several temperature sensors, pressure sensors and hydrogen concentration sensors.

[0099] Liquid hydrogen is added into the hydrogen storage bottle 1 through the liquid adding pipeline 2, and the liquid hydrogen and hydrogen gas in the hydrogen storage bottle 1 are transported to the hydrogen using end through the output pipeline 3.

[0100] Specifically, the steps of filling liquid hydrogen into the hydrogen storage bottle 1 through the liquid filling pipeline 2 are as follows: Nitrogen purging: connect the nitrogen source to the nitrogen port 25 and open the nitrogen replacement valve 27. At this time, the nitrogen source fills the filling pipe 22 with nitrogen, and the nitrogen purges the filling pipe 22.

[0101] For filling of liquid hydrogen, the liquid hydrogen source is connected to the filling port 21 , and the liquid inlet stop valve 23 is opened. At this time, the liquid hydrogen in the liquid hydrogen source is filled into the hydrogen storage bottle 1 .

[0102] Specifically, when the liquid hydrogen and hydrogen gas in the hydrogen storage bottle 1 are transported to the hydrogen-using end through the output pipeline 3, the internal pressure of the hydrogen storage bottle 1 is obtained by the pressure sensor or the first pressure sensor 57 or the hydrogen elimination pressure sensor 44 installed on the hydrogen storage bottle 1, and the internal pressure of the hydrogen storage bottle 1 is compared with the set internal pressure of the hydrogen storage bottle 1.

[0103] When the internal pressure of the hydrogen storage bottle 1 is lower than the set internal pressure of the hydrogen storage bottle 1, the switching tube group 36 is closed, and the liquid hydrogen in the hydrogen storage bottle 1 is transported to the hydrogen supply tube group 34 through the liquid phase tube group 31, the first-level water bath vaporizer 35, the boosting tube group 32, the gas phase tube group 33 and the first-level water bath vaporizer 35 in sequence, and the hydrogen in the hydrogen storage bottle 1 is transported to the hydrogen supply tube group 34 through the gas phase pipeline 331 and the first-level water bath vaporizer 35 in sequence, and the hydrogen supply tube group 34 transports hydrogen toward the hydrogen using end.

[0104] When the internal pressure of the hydrogen storage bottle 1 is higher than the set internal pressure of the hydrogen storage bottle 1, the switching tube group 36 is opened, and the liquid hydrogen in the hydrogen storage bottle 1 is transported to the hydrogen supply tube group 34 through the liquid phase tube group 31, the first-level water bath vaporizer 35 and the switching tube group 36 in sequence, and the hydrogen in the hydrogen storage bottle 1 is transported to the hydrogen supply tube group 34 through the gas phase pipeline 331 and the first-level water bath vaporizer 35 in sequence, and the hydrogen supply tube group 34 transports hydrogen toward the hydrogen using end.

[0105] By switching the settings of the tube group 36 , the liquid hydrogen in the hydrogen storage bottle 1 is transported to the hydrogen supply tube group 34 through different pipelines, thereby improving the stability of the hydrogen supply.

[0106] The detection data of the first temperature sensor 314, the second temperature sensor 316, the third temperature sensor 322, the fourth temperature sensor 324, the fifth temperature sensor 333, the sixth temperature sensor 342, the seventh temperature sensor 345, the eighth temperature sensor 351, the ninth temperature sensor 352 and other temperature sensors are obtained in real time; the detection data of the first pressure sensor 57, the second pressure sensor 347, the hydrogen elimination pressure sensor 44 and other pressure sensors are obtained in real time; the detection data of several hydrogen concentration sensors are obtained in real time, and the detection data of all sensors are monitored in real time. When there is an abnormality in the detection data of the sensor, the liquid addition pipeline 2 and the output pipeline 3 are closed, the on-board liquid hydrogen storage and supply system is stopped and an alarm is sounded.

[0107] Specifically, there are four ways to stop the on-board liquid hydrogen storage and supply system and alarm: The first is that the detection result of the seventh temperature sensor 345 is lower than minus 40°. This means that the hydrogen temperature output by the hydrogen supply pipe group 34 is too low. The second is that the detection result of the second pressure sensor 347 is less than 0.3MPa. This means that the hydrogen pressure output by the hydrogen supply pipe group 34 is too low. The third is a hydrogen leakage alarm, that is, the detection result of the hydrogen concentration sensor exceeds the set value. The fourth is a fault alarm, which determines through the detection of several sensors that there is an equipment failure in the on-board liquid hydrogen storage and supply system, resulting in the inability to supply hydrogen normally.

[0108] The implementation principle of the embodiment of the present application is as follows: through the above steps, the hydrogen and liquid hydrogen in the hydrogen storage bottle 1 can be transported to the hydrogen use end, and in this process, the hydrogen consumption pipeline 4 and the external exhaust pipeline 5 can timely discharge hydrogen to protect the hydrogen storage bottle 1. During the use of the on-board liquid hydrogen storage and supply system, the working condition of the on-board liquid hydrogen storage and supply system can be monitored in real time through the temperature sensor, the pressure sensor and the hydrogen concentration sensor. When there is a problem with the on-board liquid hydrogen storage and supply system, the liquid filling pipeline 2 and the output pipeline 3 can be controlled to be closed in time, thereby ensuring the safety of the entire on-board liquid hydrogen storage and supply system.

[0109] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A vehicle-mounted liquid hydrogen storage and supply system, characterized in that: include: A hydrogen storage bottle (1), used for storing liquid hydrogen; A liquid adding pipeline (2), the liquid adding pipeline (2) being in communication with the hydrogen storage bottle (1), and the liquid adding pipeline (2) being used for adding liquid hydrogen to the hydrogen storage bottle (1); An output pipeline (3), the output pipeline (3) being in communication with the hydrogen storage bottle (1), the output pipeline (3) being used to transport the liquid hydrogen and hydrogen gas in the hydrogen storage bottle (1) to a hydrogen use end; A hydrogen removal pipeline (4), the hydrogen removal pipeline (4) comprising a hydrogen removal pipeline (41) for discharging hydrogen, the hydrogen removal pipeline (41) being in communication with the hydrogen storage bottle (1), and an evaporation valve (42) and a hydrogen catalytic reactor (43) being sequentially arranged on the hydrogen removal pipeline (41) along a hydrogen transport direction.

2. The vehicle-mounted liquid hydrogen storage and supply system according to claim 1, characterized in that: The opening pressure of the evaporation valve (42) is less than the maximum working pressure of the hydrogen storage bottle (1).

3. The vehicle-mounted liquid hydrogen storage and supply system according to claim 1, characterized in that: The output pipeline (3) comprises a liquid phase pipe group (31), a booster pipe group (32), a gas phase pipe group (33), a hydrogen supply pipe group (34) and a first-stage water bath vaporizer (35); The gas phase pipe group (33) and the liquid phase pipe group (31) both pass through the first-stage water bath vaporizer (35); The hydrogen storage bottle (1), the gas phase pipe group (33) and the hydrogen supply pipe group (34) are connected in sequence; The hydrogen storage bottle (1), the liquid phase pipe group (31), the boost pipe group (32) and the gas phase pipe group (33) are connected in sequence; the boost pipe group (32) extends into the hydrogen storage bottle (1); the boost pipe group (32) is used to perform heat exchange with liquid hydrogen in the hydrogen storage bottle (1).

4. The vehicle-mounted liquid hydrogen storage and supply system according to claim 3, characterized in that: The output pipeline (3) further comprises a switching tube group (36), and the hydrogen storage bottle (1), the liquid phase tube group (31), the switching tube group (36) and the hydrogen supply tube group (34) are sequentially connected; The switching tube group (36) comprises a switching pipeline (361), on which a boost solenoid valve (362) is provided, and two ends of the switching pipeline (361) are respectively connected to the liquid phase tube group (31) and the hydrogen supply tube group (34).

5. The vehicle-mounted liquid hydrogen storage and supply system according to claim 3, characterized in that: The liquid phase pipe group (31) comprises a liquid phase pipeline (311), one end of the liquid phase pipeline (311) is connected to the hydrogen storage bottle (1), and the other end is connected to the booster pipe group (32); The liquid phase pipeline (311) is provided with a liquid outlet solenoid valve (313) and a sheet-wound vaporizer (315), and the liquid outlet solenoid valve (313), the sheet-wound vaporizer (315) and the first-stage water bath vaporizer (35) are arranged in sequence along the hydrogen transport direction in the liquid phase pipeline (311).

6. The vehicle-mounted liquid hydrogen storage and supply system according to claim 3, characterized in that: The boosting pipe group (32) comprises a boosting pipeline (321), one end of the boosting pipeline (321) is connected to the liquid phase pipe group (31), and the other end of the boosting pipeline (321) is connected to the gas phase pipe group (33); The boost pipe group (32) is provided with a secondary water bath vaporizer (323), a boost regulating valve (325) and a heat exchange plate (326); the secondary water bath vaporizer (323), the boost regulating valve (325) and the heat exchange plate (326) are arranged in sequence along the hydrogen transport direction in the boost pipe (321), and the heat exchange plate (326) is located in the hydrogen storage bottle (1).

7. The vehicle-mounted liquid hydrogen storage and supply system according to claim 1, characterized in that: The invention also comprises an external discharge pipeline (5), wherein the external discharge pipeline (5) comprises a primary discharge pipe (51) for discharging hydrogen, wherein the primary discharge pipe (51) is connected to the hydrogen storage bottle (1), and a primary safety valve (52) is provided on the primary discharge pipe (51), wherein the opening pressure of the primary safety valve (52) is greater than the maximum working pressure of the hydrogen storage bottle (1).

8. The vehicle-mounted liquid hydrogen storage and supply system according to claim 7, characterized in that: The external discharge pipeline (5) further comprises a secondary discharge pipe (53) for discharging hydrogen, the secondary discharge pipe (53) being in communication with the hydrogen storage bottle (1), and a secondary safety valve (54) being arranged on the secondary discharge pipe (53), the opening pressure of the secondary safety valve (54) being greater than the opening pressure of the primary safety valve (52).

9. The vehicle-mounted liquid hydrogen storage and supply system according to claim 7, characterized in that: The external discharge pipeline (5) further comprises a manual discharge pipe (55) for discharging hydrogen, the manual discharge pipe (55) being in communication with the hydrogen storage bottle (1), and a manual discharge valve (56) being provided on the manual discharge pipe (55).

10. A control method for a vehicle-mounted liquid hydrogen storage and supply system, used for controlling a vehicle-mounted liquid hydrogen storage and supply system according to any one of claims 1 to 9, characterized in that: The following steps are involved: A plurality of temperature sensors, a plurality of pressure sensors and a plurality of hydrogen concentration sensors are installed on the liquid adding pipeline (2) and the output pipeline (3); Liquid hydrogen is added into the hydrogen storage bottle (1) through the liquid adding pipeline (2), and the liquid hydrogen and hydrogen gas in the hydrogen storage bottle (1) are transported to the hydrogen using end through the output pipeline (3); The detection data of all temperature sensors, pressure sensors and hydrogen concentration sensors are acquired in real time, and the detection data of all temperature sensors, pressure sensors and hydrogen concentration sensors are monitored. When the detection data of the temperature sensor, pressure sensor or hydrogen concentration sensor is abnormal, the output pipeline (3) and the output pipeline (3) are closed.

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