Liquid hydrogen filling device and method

Abstract

The invention discloses a liquid hydrogen filling device and method, and belongs to the technical field of liquid hydrogen. The device comprises a liquid hydrogen supply tank, a liquid hydrogen receiving tank, a filling pipeline and a pressurizing pipeline, the bottom of the liquid hydrogen supply tank is communicated with the bottom of the liquid hydrogen receiving tank through a filling pipeline; evaporation ends of the low-temperature heat pipes are positioned in the hydrogen adsorption module, and condensation ends of the low-temperature heat pipes are positioned in the metal cavity and are provided with metal fins; the head end of the pressurizing pipeline is divided into two branches, the first branch is connected with the filling pipeline, the first pressurizing valve, the intermittent heater and the metal cavity, the second branch is connected with the top of the liquid hydrogen receiving tank and the second pressurizing valve, and the two branches are combined and then connected with the liquid hydrogen supply tank. The pressure in the receiving tank in the filling process is reduced through the hydrogen adsorption module, the filling success rate is increased, meanwhile, liquid hydrogen is used for conducting non-contact cooling on the hydrogen adsorption module, vaporized hydrogen obtained after cooling serves as pressurized gas of the supply tank, the pressure in the hydrogen adsorption module is kept stable, and a certain supercooling degree is provided for operation of the liquid hydrogen pump.

Description

Technical Field

[0001] The present invention belongs to the technical field of liquid hydrogen, and in particular relates to a liquid hydrogen filling device and method. Background Art

[0002] Cryogenic propellants such as liquid hydrogen have the advantages of high specific impulse, being non-toxic and pollution-free. They have been put into use as propellants for launch vehicles and will be widely used in future large-scale space missions such as manned lunar landings, Mars and other distant planetary explorations. For such long-term, long-distance flight missions, if sufficient propellant is carried directly from the ground, it will inevitably lead to problems such as the huge size of the spacecraft, difficulty in launch and control, and high cost. Therefore, researchers have proposed the concept of space refueling for the first time, that is, spacecraft replenish propellant in orbit to reduce the ground launch load, extend the spacecraft's working time, and thus expand the scope of space exploration. Propellant space refueling is of great significance to future space exploration. The world's major space powers have conducted many years of research in this field and have basically solved the relevant technical difficulties of in-orbit refueling of room-temperature propellants. However, in-orbit refueling of cryogenic propellants is more difficult and is still in the research stage. There are several potential methods for on-orbit refueling of cryogenic propellants, such as liquid hydrogen. Among them, vent-free refueling technology, by controlling parameters such as the temperature and pressure of the cryogenic propellant, can produce minimal or no gas during the refueling process. This allows direct refueling with the receiving tank sealed. This technology offers the advantages of no vaporization losses and ease of operation, making it one of the most promising development directions for on-orbit refueling of cryogenic propellants. However, during the on-orbit refueling process, the liquid cryogenic propellant entering the receiving tank maintains a stable internal pressure by liquefying the gaseous cryogenic propellant. Therefore, if the pressure in the receiving tank increases too quickly during the refueling process, the refueling operation can easily fail. Summary of the Invention

[0003] The present invention aims to overcome the shortcomings of the prior art and provide a liquid hydrogen refueling device and method. By installing an adsorption unit in a liquid hydrogen temperature zone within the liquid hydrogen receiving tank, the present invention reduces the pressure within the receiving tank during the refueling process, thereby improving the refueling success rate. Furthermore, the adsorption unit is contactlessly cooled using liquid hydrogen, and the vaporized hydrogen after cooling is used as boost gas for the supply tank, maintaining stable internal pressure and providing a certain degree of subcooling for the operation of the liquid hydrogen pump.

[0004] The specific technical solutions adopted in the present invention are as follows:

[0005] In a first aspect, the present invention provides a liquid hydrogen filling device, comprising a liquid hydrogen supply tank, a liquid hydrogen receiving tank, a filling pipeline, and a pressurizing pipeline;

[0006] The top of the liquid hydrogen supply tank is provided with a supply tank exhaust valve, and the bottom is connected to the bottom of the liquid hydrogen receiving tank through a filling pipeline provided with a filling valve and a liquid hydrogen pump; the tail section of the filling pipeline extends into the liquid hydrogen receiving tank, and the end is provided with a metal nozzle for converting the filled liquid hydrogen into liquid hydrogen droplets; the outside of the filling pipeline located in the liquid hydrogen receiving tank is covered with a vacuum sleeve; the top of the liquid hydrogen receiving tank is provided with a receiving tank exhaust valve and a metal cavity that is not connected to the tank cavity, and the upper part of the tank cavity is provided with a hydrogen adsorption module; the evaporation end of the low-temperature heat pipe is located in the hydrogen adsorption module, and the condensation end is located in the metal cavity and is equipped with metal fins; the head end of the boosting pipeline is divided into two branches, the first branch is connected to the filling pipeline located at the front end of the filling valve, the first boosting valve, the intermittent heater and the metal cavity in sequence, and the second branch is connected to the top of the liquid hydrogen receiving tank and the second boosting valve in sequence. The first branch and the second branch are then merged and connected to the top of the liquid hydrogen supply tank after passing through the buffer tank.

[0007] Preferably, the filling pipeline located in the liquid hydrogen receiving tank is vertically arranged and is coaxially covered with a vacuum sleeve on the outside.

[0008] Preferably, the low-temperature heat pipe is a helium working fluid capillary heat pipe.

[0009] Preferably, the metal nozzle is a multi-nozzle structure.

[0010] Preferably, the adsorbent in the hydrogen adsorption module is at least one of activated carbon, carbon nanotubes or metal organic frameworks.

[0011] Preferably, the intermittent heater is an electric heater.

[0012] Preferably, the liquid hydrogen supply tank, liquid hydrogen receiving tank, filling pipeline, boosting pipeline, liquid hydrogen pump, metal cavity, boosting pipeline and buffer tank are all provided with an insulation layer on the outside.

[0013] In a second aspect, the present invention provides a liquid hydrogen filling method using the liquid hydrogen filling device according to any one of the first aspects, as follows:

[0014] S1: Open the first boost valve and start the intermittent heater. Liquid hydrogen from the liquid hydrogen supply tank enters the first branch of the boost pipeline. After passing through the first boost valve, the liquid hydrogen enters the intermittent heater to absorb heat and vaporize. It then flows through the metal cavity and the buffer tank in sequence and enters the liquid hydrogen supply tank, providing subcooling for the liquid hydrogen inside the liquid hydrogen supply tank.

[0015] S2: Open the filling valve and start the liquid hydrogen pump. The supercooled liquid hydrogen from the liquid hydrogen supply tank is pressurized by the liquid hydrogen pump and enters the liquid hydrogen receiving tank. It is then atomized into fine liquid hydrogen particles by a metal nozzle. The liquid hydrogen particles cool the hydrogen inside the liquid hydrogen receiving tank, partially liquefying it and thus reducing the pressure inside the liquid hydrogen receiving tank. During the cooling process, although some of the supercooled liquid hydrogen in the liquid hydrogen receiving tank vaporizes, some of the hydrogen is still liquefying, so the pressure inside the liquid hydrogen receiving tank can be maintained within the normal range, and the remaining liquid hydrogen particles accumulate inside the liquid hydrogen receiving tank again.

[0016] S3: Part of the hydrogen generated by the supercooled liquid hydrogen particles inside the liquid hydrogen receiving tank is adsorbed by the hydrogen adsorption module, which moderately reduces the pressure inside the liquid hydrogen receiving tank, thereby significantly improving the success rate of liquid hydrogen refueling. The adsorption heat generated by the hydrogen adsorption module heats the working fluid at the evaporation end of the low-temperature heat pipe. After vaporization, the working fluid is transferred to the condensation end of the low-temperature heat pipe. After absorbing the cold energy of the supercooled liquid hydrogen, the working fluid is liquefied again and flows back to the evaporation end of the low-temperature heat pipe, repeating the cycle.

[0017] S4: The intermittent heater is turned off, and the liquid hydrogen from the liquid hydrogen supply tank enters the boosting pipeline, passes through the first boosting valve and the intermittent heater, enters the metal cavity to absorb heat and vaporize, then flows through the boosting pipeline, passes through the buffer tank for buffering, and then enters the liquid hydrogen supply tank, providing subcooling for the liquid hydrogen inside the liquid hydrogen supply tank;

[0018] S5: When the pressure of the liquid hydrogen receiving tank rises too quickly during the filling process, the second boost valve is opened to reduce the internal pressure of the liquid hydrogen receiving tank, thereby realizing dynamic adjustment of the internal pressure of the liquid hydrogen receiving tank; the hydrogen discharged during the dynamic adjustment process enters the buffer tank through the second boost valve, and mixes with the hydrogen from the metal cavity to jointly pressurize the liquid hydrogen supply tank.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] By setting an adsorption unit (i.e., hydrogen adsorption module) in a liquid hydrogen temperature zone in the liquid hydrogen receiving tank, the pressure in the liquid hydrogen receiving tank during the filling process can be reduced, thereby improving the success rate of filling. The adsorption heat of the adsorption unit is transferred to the outside of the liquid hydrogen receiving tank by using a low-temperature heat pipe, which can achieve contactless cooling and reduce the influence of the external ambient temperature. The supercooled liquid hydrogen inside the liquid hydrogen supply tank is used to cool the condensing end of the low-temperature heat pipe, and the vaporized hydrogen is returned to the liquid hydrogen supply tank for pressurization, which can achieve deep coupling of the pressurization function and the adsorption function. The adsorption unit does not require an additional cold source, and since the adsorption heat zone is low, the liquid hydrogen supply tank can achieve "low-temperature pressurization". During the filling process, the liquid hydrogen receiving tank can also directly "low-temperature pressurize" the liquid hydrogen supply tank for a short time, which can greatly improve the success rate of filling and reduce hydrogen loss. A buffer tank is set in the pressurization pipeline to achieve pressure stability of the two-way pressurized hydrogen and reduce the volatility of the filling process.

[0021] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a liquid hydrogen filling device of the present invention.

[0023] In the figure: liquid hydrogen supply tank 1, supply tank exhaust valve 2, liquid hydrogen receiving tank 3, receiving tank exhaust valve 4, filling pipeline 5, filling valve 6, liquid hydrogen pump 7, vacuum sleeve 8, metal nozzle 9, hydrogen adsorption module 10, low-temperature heat pipe 11, metal fin 12, metal cavity 13, boosting pipeline 14, first boosting valve 15, intermittent heater 16, second boosting valve 17, buffer tank 18. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below. The technical features in the various embodiments of the present invention can be combined accordingly without conflicting with each other.

[0025] In the description of the present invention, it should be understood that when an element is considered to be "connected" to another element, it can be directly connected to the other element or indirectly connected, that is, there are intermediate elements. On the contrary, when an element is said to be "directly" connected to another element, there are no intermediate elements.

[0026] In the description of the present invention, it should be understood that the terms "first" and "second" are used solely for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly specifying the number of technical features being described. Therefore, features defined as "first" or "second" may explicitly or implicitly include at least one of such features.

[0027] like Figure 1 As shown, a liquid hydrogen filling device provided by the present invention mainly includes a liquid hydrogen supply tank 1, a supply tank exhaust valve 2, a liquid hydrogen receiving tank 3, a receiving tank exhaust valve 4, a filling pipeline 5, a filling valve 6, a liquid hydrogen pump 7, a vacuum sleeve 8, a metal nozzle 9, a hydrogen adsorption module 10, a low-temperature heat pipe 11, a metal fin 12, a metal cavity 13, a boosting pipeline 14, a first boosting valve 15, an intermittent heater 16, a second boosting valve 17, and a buffer tank 18.

[0028] The structure and connection method of each component will be described in detail below.

[0029] In the device of the present invention, a supply tank exhaust valve 2 is provided at the top of the liquid hydrogen supply tank 1. The pipeline where the supply tank exhaust valve 2 is located is connected to the tank cavity of the liquid hydrogen supply tank 1, so that excess hydrogen gas inside the liquid hydrogen supply tank 1 can be discharged. The bottom of the liquid hydrogen supply tank 1 is connected to the bottom of the liquid hydrogen receiving tank 3 through a filling pipeline 5. The filling pipeline 5 located outside the liquid hydrogen supply tank 1 and the liquid hydrogen receiving tank 3 is provided with a filling valve 6 and a liquid hydrogen pump 7 in sequence. The filling pipeline 5 is used to fill the liquid hydrogen propellant in the liquid hydrogen supply tank 1 into the liquid hydrogen receiving tank 3. The tail section of the filling pipeline 5 extends into the liquid hydrogen receiving tank 3, and the outside of the part of the filling pipeline 5 located in the liquid hydrogen receiving tank 3 is covered with a vacuum sleeve 8. A metal nozzle 9 is provided at the end of the filling pipeline 5. The metal nozzle 9 can convert the filling liquid hydrogen from the liquid hydrogen supply tank 1 into liquid hydrogen droplets (i.e., fine liquid hydrogen particles), thereby enhancing the cooling effect on the hydrogen gas inside the liquid hydrogen receiving tank 3.

[0030] In a preferred embodiment of the present invention, the filling pipeline 5 within the liquid hydrogen receiving tank 3 can be arranged vertically and coaxially coated with a vacuum sleeve 8. The vacuum sleeve 8 can be arranged along the wall of the liquid hydrogen receiving tank 3. The metal nozzle 9 can be configured as a multi-nozzle structure to increase the contact area between the filling liquid hydrogen and the hydrogen gas.

[0031] In the device of the present invention, a receiving tank exhaust valve 4 is provided on the top of the liquid hydrogen receiving tank 3. The pipeline where the receiving tank exhaust valve 4 is located is connected to the tank cavity of the liquid hydrogen receiving tank 3, so that excess hydrogen can be discharged in an emergency. A metal cavity 13 is provided on the top of the liquid hydrogen receiving tank 3, and the metal cavity 13 is not connected to the tank cavity. A hydrogen adsorption module 10 is provided in the upper part of the tank cavity. A low-temperature heat pipe 11 is provided on the top of the liquid hydrogen receiving tank 3. The low-temperature heat pipe 11 includes an evaporation end and a condensation end. The evaporation end is located in the hydrogen adsorption module 10, and the condensation end is located in the metal cavity 13. Metal fins 12 are installed on the outer periphery of the low-temperature heat pipe 11 located in the metal cavity 13. The metal fins 12 can use the adsorption heat generated by the hydrogen adsorption module 10 to vaporize the supercooled liquid hydrogen from the liquid hydrogen supply tank 1, thereby improving the adsorption capacity of the hydrogen adsorption module 10.

[0032] As a preferred embodiment of the present invention, the low-temperature heat pipe 11 can be a helium working medium capillary heat pipe, which is suitable for the liquid hydrogen temperature range and avoids the influence of gravity.

[0033] As a preferred embodiment of the present invention, the adsorbent inside the hydrogen adsorption module 10 can be selected from materials such as activated carbon, carbon nanotubes or metal organic frameworks suitable for low temperature zones, and can be one or more materials.

[0034] In the device of the present invention, the head end of the boosting pipeline 14 is divided into two branches. The first branch is connected in sequence to the filling pipeline 5 located at the front end of the filling valve 6, the first boosting valve 15, the intermittent heater 16 and the metal cavity 13, and the second branch is connected in sequence to the top of the liquid hydrogen receiving tank 3 and the second boosting valve 17. The first branch and the second branch are then merged into one pipeline. The merged pipeline is buffered and stabilized by the buffer tank 18 and finally enters the top of the liquid hydrogen supply tank 1, maintaining the pressure balance inside the liquid hydrogen supply tank 1 and providing subcooling for the liquid hydrogen pump 7.

[0035] As a preferred embodiment of the present invention, the intermittent heater 16 only operates when the system is started, and can be heated by electricity or other heating methods.

[0036] As a preferred embodiment of the present invention, the liquid hydrogen supply tank 1, the liquid hydrogen receiving tank 3, the filling pipeline 5, the boosting pipeline, the liquid hydrogen pump 7, the metal cavity 13, the boosting pipeline 14 and the buffer tank 18 are all provided with an insulation layer on the outside to prevent heat leakage of each device during use.

[0037] Based on the above liquid hydrogen filling device, the present invention also provides a liquid hydrogen filling method, which (i.e., the operating principle) is as follows:

[0038] Assume that the system has completed replacement, there is sufficient liquid hydrogen in the liquid hydrogen supply tank 1, and the liquid hydrogen receiving tank 3, filling pipeline 5, filling valve 6, liquid hydrogen pump 7 and other equipment have completed pre-cooling, and can be directly filled, and all valves are in the closed state.

[0039] S1: Open the first boost valve 15 and start the intermittent heater 16. Liquid hydrogen from the liquid hydrogen supply tank 1 enters the first branch of the boost pipeline 14. After passing through the first boost valve 15, the liquid hydrogen enters the intermittent heater 16, where it absorbs heat and vaporizes. It then flows through the metal cavity 13 and the buffer tank 18 in sequence and enters the liquid hydrogen supply tank 1, providing subcooling for the liquid hydrogen inside the liquid hydrogen supply tank 1.

[0040] S2: Open the filling valve 6 and start the liquid hydrogen pump 7. Supercooled liquid hydrogen from the liquid hydrogen supply tank 1 is pressurized by the liquid hydrogen pump 7 and enters the liquid hydrogen receiving tank 3. It is then atomized into fine liquid hydrogen particles by the metal nozzle 9. The liquid hydrogen particles cool the hydrogen gas inside the liquid hydrogen receiving tank 3, partially liquefying it and thereby reducing the pressure inside the liquid hydrogen receiving tank 3. During the cooling process, although some supercooled liquid hydrogen in the liquid hydrogen receiving tank 3 vaporizes, the pressure inside the liquid hydrogen receiving tank 3 is maintained within a normal range because some hydrogen gas continues to liquefy. The remaining liquid hydrogen particles accumulate again inside the liquid hydrogen receiving tank 3.

[0041] S3: Some of the hydrogen generated by the supercooled liquid hydrogen particles within the liquid hydrogen receiving tank 3 is adsorbed by the hydrogen adsorption module 10, moderately reducing the pressure within the liquid hydrogen receiving tank 3 and significantly improving the success rate of liquid hydrogen refueling. The adsorption heat generated by the hydrogen adsorption module 10 heats the working fluid at the evaporation end of the low-temperature heat pipe 11. After vaporization, the working fluid is transferred to the condensation end of the low-temperature heat pipe 11. After absorbing the cold energy of the supercooled liquid hydrogen, the working fluid is liquefied again and flows back to the evaporation end of the low-temperature heat pipe 11. In other words, the working fluid can circulate back and forth between the evaporation section and the condensation end.

[0042] S4: Turn off the intermittent heater 16, and the liquid hydrogen from the liquid hydrogen supply tank 1 enters the boosting pipeline 14, passes through the first boosting valve 15 and the intermittent heater 16, enters the metal cavity 13 to absorb heat and vaporize, and then flows through the boosting pipeline 14 through the buffer tank 18 for buffering before entering the liquid hydrogen supply tank 1, providing supercooling for the liquid hydrogen inside the liquid hydrogen supply tank 1.

[0043] S5: When the pressure in the liquid hydrogen receiving tank 3 rises too quickly during the filling process, the second boost valve 17 is opened to reduce the internal pressure of the liquid hydrogen receiving tank 3, thereby achieving dynamic pressure regulation within the liquid hydrogen receiving tank 3. The hydrogen discharged during the dynamic regulation process enters the buffer tank 18 through the second boost valve 17, where it mixes with the hydrogen from the metal cavity 13 to jointly boost the pressure of the liquid hydrogen supply tank 1.

[0044] In actual use, the supply tank exhaust valve 2 of the liquid hydrogen supply tank 1 and the receiving tank exhaust valve 4 of the liquid hydrogen receiving tank 3 are only opened during necessary operations such as precooling, and are closed at other times to avoid hydrogen loss.

[0045] The embodiment described above is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Persons skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, any technical solution obtained by equivalent substitution or equivalent transformation falls within the scope of protection of the present invention.

Claims

1. A liquid hydrogen filling device, characterized in that: It comprises a liquid hydrogen supply tank (1), a liquid hydrogen receiving tank (3), a filling pipeline (5) and a pressurizing pipeline (14); The top of the liquid hydrogen supply tank (1) is provided with a supply tank exhaust valve (2), and the bottom is connected to the bottom of the liquid hydrogen receiving tank (3) through a filling pipeline (5) provided with a filling valve (6) and a liquid hydrogen pump (7); the tail section of the filling pipeline (5) extends into the liquid hydrogen receiving tank (3), and the end is provided with a metal nozzle (9) for converting the filled liquid hydrogen into liquid hydrogen droplets; the filling pipeline (5) located in the liquid hydrogen receiving tank (3) is covered with a vacuum sleeve (8) on the outside; the top of the liquid hydrogen receiving tank (3) is provided with a receiving tank exhaust valve (4) and a metal cavity (13) that is not connected to the tank cavity, and the upper part of the tank cavity is provided with a hydrogen adsorption module (10); the evaporation end of the low-temperature heat pipe (11) is located in the hydrogen adsorption module (10), and the condensation end is located in the metal cavity (13) and is installed with a metal fin (12); the head end of the boosting pipeline (14) is divided into two branches, the first branch is connected in sequence to the filling pipeline (5) located at the front end of the filling valve (6), the first boosting valve (15), the intermittent heater (16) and the metal cavity (13), and the second branch is connected in sequence to the top of the liquid hydrogen receiving tank (3) and the second boosting valve (17), and the first branch and the second branch are subsequently merged and connected to the top of the liquid hydrogen supply tank (1) after passing through the buffer tank (18).

2. A liquid hydrogen filling device according to claim 1, characterized in that: The filling pipeline (5) located in the liquid hydrogen receiving tank (3) is vertically arranged and is coaxially coated with a vacuum sleeve (8) on the outside.

3. A liquid hydrogen filling device according to claim 1, characterized in that: The low-temperature heat pipe (11) is a helium working medium capillary heat pipe.

4. A liquid hydrogen filling device according to claim 1, characterized in that: The metal nozzle (9) is a multi-nozzle structure.

5. The liquid hydrogen filling device according to claim 1, characterized in that: The adsorbent in the hydrogen adsorption module (10) is at least one of activated carbon, carbon nanotubes or metal organic frameworks.

6. The liquid hydrogen filling device according to claim 1, characterized in that: The intermittent heater (16) is an electric heater.

7. The liquid hydrogen filling device according to claim 1, characterized in that: The liquid hydrogen supply tank (1), the liquid hydrogen receiving tank (3), the filling pipeline (5), the boosting pipeline, the liquid hydrogen pump (7), the metal cavity (13), the boosting pipeline (14) and the buffer tank (18) are all provided with an insulation layer on the outside.

8. A method for filling liquid hydrogen using the liquid hydrogen filling device according to any one of claims 1 to 7, characterized in that: The details are as follows: S1: Open the first boost valve (15), start the intermittent heater (16), and the liquid hydrogen from the liquid hydrogen supply tank (1) enters the first branch of the boost pipeline (14); the liquid hydrogen passes through the first boost valve (15) and enters the intermittent heater (16) to absorb heat and vaporize, and then flows through the metal cavity (13) and the buffer tank (18) in sequence and enters the liquid hydrogen supply tank (1), providing subcooling for the liquid hydrogen inside the liquid hydrogen supply tank (1); S2: Open the filling valve (6), start the liquid hydrogen pump (7), and the supercooled liquid hydrogen from the liquid hydrogen supply tank (1) is pressurized by the liquid hydrogen pump (7) and enters the liquid hydrogen receiving tank (3), and then is atomized into fine liquid hydrogen particles by the metal nozzle (9); the liquid hydrogen particles cool the hydrogen inside the liquid hydrogen receiving tank (3), partially liquefying it and thereby reducing the pressure inside the liquid hydrogen receiving tank (3); during the cooling process, although part of the supercooled liquid hydrogen in the liquid hydrogen receiving tank (3) is vaporized, since part of the hydrogen is still liquefied, the pressure inside the liquid hydrogen receiving tank (3) can be maintained within a normal range, and the remaining liquid hydrogen particles are accumulated inside the liquid hydrogen receiving tank (3) again; S3: Part of the hydrogen generated by the supercooled liquid hydrogen particles inside the liquid hydrogen receiving tank (3) is adsorbed by the hydrogen adsorption module (10), so that the pressure inside the liquid hydrogen receiving tank (3) is appropriately reduced, thereby significantly improving the success rate of liquid hydrogen filling; the adsorption heat generated by the hydrogen adsorption module (10) heats the working medium at the evaporation end of the low-temperature heat pipe (11), and the working medium is vaporized and transferred to the condensation end of the low-temperature heat pipe (11), and the working medium absorbs the cold energy of the supercooled liquid hydrogen and liquefies again, and flows back to the evaporation end of the low-temperature heat pipe (11), and the cycle repeats; S4: The intermittent heater (16) is turned off, and the liquid hydrogen from the liquid hydrogen supply tank (1) enters the boosting pipeline (14), passes through the first boosting valve (15) and the intermittent heater (16), and then enters the metal cavity (13) to absorb heat and vaporize. Then, it flows through the boosting pipeline (14) and the buffer tank (18) for buffering before entering the liquid hydrogen supply tank (1), providing subcooling for the liquid hydrogen inside the liquid hydrogen supply tank (1); S5: When the pressure of the liquid hydrogen receiving tank (3) rises too quickly during the filling process, the second boost valve (17) is opened to reduce the internal pressure of the liquid hydrogen receiving tank (3), thereby realizing dynamic regulation of the internal pressure of the liquid hydrogen receiving tank (3); hydrogen discharged during the dynamic regulation process enters the buffer tank (18) through the second boost valve (17), and is mixed with the hydrogen from the metal cavity (13), thereby jointly pressurizing the liquid hydrogen supply tank (1).

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