Liquid hydrogen supply system

Abstract

The invention discloses a liquid hydrogen supply system which comprises a liquid storage device, a filling pipe, a pressurizing pipeline assembly, a gas supply pipeline assembly and a gas return pipe, one end of the filling pipe is connected with a gas phase of the liquid storage device, the other end of the filling pipe is a filling port, and a first valve is arranged on the filling pipe; one end of the pressurizing pipeline assembly is connected with the bottom of the liquid accumulator, the other end of the pressurizing pipeline assembly is connected with a gas phase of the liquid accumulator, and the pressurizing pipeline assembly converts liquid hydrogen into gas and conveys the gas phase back to the liquid accumulator; one end of the gas supply pipeline assembly is connected with a liquid phase of the liquid storage device, and the gas supply pipeline assembly converts liquid hydrogen into a gas state for gas supply; one end of the air return pipe is connected with the gas phase of the liquid storage device, and the other end of the air return pipe is an air return port. According to the liquid hydrogen supply system, the liquid hydrogen can be converted into the gas state through the pressurization pipeline assembly and conveyed back into the liquid storage device, so that the internal pressure of the liquid storage device is increased, the internal pressure of the liquid storage device meets the working pressure requirement, and normal gas supply can be guaranteed.

Description

Technical Field

[0001] This application relates to the field of liquid hydrogen technology, and more particularly to a liquid hydrogen supply system. Background Technology

[0002] With the accelerated transformation of the global energy structure, the environmental pollution and resource depletion caused by the large-scale use of traditional fossil fuels are becoming increasingly prominent. Developing clean, efficient, and sustainable alternative energy sources has become a core research and development direction in the energy sector. Hydrogen energy, as a zero-carbon energy source with high energy density and water as its only combustion product, is considered a key component of the future energy system.

[0003] In the storage and transportation of hydrogen energy, liquid hydrogen has broad application prospects in transportation (such as new energy vehicles, ships, and aerospace), distributed energy supply, and industrial power due to its advantages such as high energy density per unit volume, small storage space requirement, and high efficiency in long-distance transportation. Typically, a liquid hydrogen gas supply system is used to convert liquid hydrogen into a gaseous state for use.

[0004] However, in traditional liquid hydrogen supply systems, the liquid hydrogen level inside the liquid hydrogen storage container decreases due to long-term use, and the gas phase pressure decreases accordingly, which cannot meet the working pressure requirements of the liquid hydrogen storage container. Summary of the Invention

[0005] The main objective of this application is to provide a liquid hydrogen supply system that addresses the problem in traditional liquid hydrogen supply systems where the liquid hydrogen storage container cannot meet the operating pressure requirements after prolonged use.

[0006] To achieve the above objectives, this application provides a liquid hydrogen supply system, comprising: a liquid reservoir, a filling pipe, a pressurization pipeline assembly, a gas supply pipeline assembly, and a return pipe. One end of the filling pipe is connected to the gas phase of the liquid reservoir, and the other end is a filling port. A first valve is installed on the filling pipe. One end of the pressurization pipeline assembly is connected to the bottom of the liquid reservoir, and the other end is connected to the gas phase of the liquid reservoir. The pressurization pipeline assembly converts liquid hydrogen into a gaseous state and returns it to the gas phase of the liquid reservoir. One end of the gas supply pipeline assembly is connected to the liquid phase of the liquid reservoir, and the gas supply pipeline assembly converts liquid hydrogen into a gaseous state for gas supply. One end of the return pipe is connected to the gas phase of the liquid reservoir, and the other end is a return port. A second valve is installed on the return pipe.

[0007] Optionally, the pressurization pipeline assembly includes: a pressurization pipe, one end of which is connected to the liquid reservoir and the other end of which is connected to the return gas pipe, wherein the connection area between the pressurization pipe and the return gas pipe is located between the second valve and the liquid reservoir; wherein, in the circuit formed by the pressurization pipe, the return gas pipe and the liquid reservoir, a third valve, a pressurization regulating valve and a pressurization air-temperature heat exchanger are sequentially arranged on the pressurization pipe, and a fourth valve is arranged on the return gas pipe.

[0008] Optionally, the gas supply pipeline assembly includes: a gas supply pipe, one end of which is connected to the liquid reservoir; wherein, in the direction away from the liquid reservoir, a fifth valve, a vaporizer, a buffer tank, and a pressure regulating valve are sequentially arranged on the gas supply pipe.

[0009] Optionally, a gas supply flame arrester is also provided on the gas supply pipe; wherein, on the gas supply pipe, the gas supply flame arrester is located on the side of the pressure regulating valve away from the liquid reservoir.

[0010] Optionally, the liquid hydrogen supply system further includes: a first pressure relief pipe and a second pressure relief pipe, the first pressure relief pipe being connected to the liquid reservoir and equipped with a first pressure relief valve; the second pressure relief pipe being connected to the liquid reservoir and equipped with a second pressure relief valve; wherein the opening pressure of the second pressure relief valve is greater than the opening pressure of the first pressure relief valve.

[0011] Optionally, the liquid hydrogen supply system further includes: a liquid level measuring sensor and a gas phase pressure sensor, wherein the liquid level measuring sensor is disposed inside the liquid reservoir; and the gas phase pressure sensor is connected to the gas connection of the liquid reservoir.

[0012] Optionally, the liquid reservoir includes: an inner container, an outer container, and an insulation layer, wherein the outer container is fitted over the inner container and there is a vacuum gap between the outer container and the inner container; the insulation layer is disposed between the inner container and the outer container.

[0013] Optionally, the liquid hydrogen supply system further includes a cold shield tube, which is divided into an interconnected winding section and a connecting section. The winding section is wound between the inner container and the insulation layer and is connected to the gas phase of the inner container. In the direction away from the winding section, a sixth valve and a cold shield pressure valve are sequentially provided on the connecting section.

[0014] Optionally, the liquid hydrogen supply system further includes: a discharge pipe, one end of which is connected to the filling pipe and the other end of which is a discharge port, the communication area between the discharge pipe and the filling pipe being located between the filling port and the first valve; wherein, a seventh valve is provided on the discharge pipe.

[0015] Optionally, both the inner container and the outer container are made of stainless steel.

[0016] This application proposes a liquid hydrogen supply system. Liquid hydrogen is added to a reservoir through a filling pipe. During the filling process, gas inside the reservoir is discharged through a return pipe to maintain the internal pressure balance. After filling, the supply pipeline assembly can be used to convert the liquid hydrogen into a gaseous state for supply. During long-term use, if the internal pressure of the reservoir decreases, the liquid hydrogen is converted into a gaseous state through a pressurization pipeline assembly and transported back to the reservoir, thereby increasing the internal pressure of the reservoir to meet the working pressure requirements and ensuring normal gas supply. Attached Figure Description

[0017] To more clearly illustrate the prior art and the present invention, the accompanying drawings used in the description of the prior art and the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other drawings from the provided drawings without any creative effort.

[0018] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed herein.

[0019] Figure 1 This is a schematic diagram of the overall structure of a liquid hydrogen supply system provided in an embodiment of this application; Figure 2 This is a schematic diagram of the structure of the booster pipeline assembly in the embodiments of this application; Figure 3 This is a schematic diagram of the gas supply pipeline assembly in an embodiment of this application; Figure 4 This is a schematic diagram of the structure at the cold shield tube in an embodiment of this application; In the diagram: 1. Liquid reservoir; 11. Inner container; 12. Outer container; 13. Insulation layer; 2. Filling pipe; 21. Filling port; 22. First valve; 3. Pressurization pipe; 31. Third valve; 32. Pressurization regulating valve; 33. Pressurized air-temperature heat exchanger; 34. Fourth valve; 4. Gas supply pipe; 41. Fifth valve; 42. Vaporizer; 43. Buffer tank; 44. Pressure regulating valve; 45. Gas supply flame arrestor; 5. 51. Return gas pipe; 52. Return gas port; 61. Second valve; 61. First pressure relief pipe; 611. First pressure relief valve; 62. Second pressure relief pipe; 621. Second pressure relief valve; 71. Liquid level measurement sensor; 72. Gas phase pressure sensor; 73. Pressure display gauge; 74. Liquid level display transmitter; 8. Cold shield pipe; 81. Sixth valve; 82. Cold shield pressure valve; 9. Discharge pipe; 91. Discharge port; 92. Seventh valve.

[0020] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0022] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0023] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0025] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] Figure 1 This is a schematic diagram of the overall structure of a liquid hydrogen supply system provided in an embodiment of this application; Figure 2 This is a schematic diagram of the structure of the booster pipeline assembly in the embodiments of this application; Figure 3 This is a schematic diagram of the gas supply pipeline assembly in an embodiment of this application; Figure 4 This is a schematic diagram of the structure of the cold shield tube in an embodiment of this application.

[0027] refer to Figure 1 This application provides a liquid hydrogen supply system, which may include: a liquid reservoir 1, a filling pipe 2, a pressurization pipeline assembly, a gas supply pipeline assembly, and a return pipe 5. One end of the filling pipe 2 is connected to the gas phase of the liquid reservoir 1, and the other end is a filling port 21. A first valve 22 is provided on the filling pipe 2. One end of the pressurization pipeline assembly is connected to the bottom of the liquid reservoir 1, and the other end is connected to the gas phase of the liquid reservoir 1. The pressurization pipeline assembly converts liquid hydrogen into a gaseous state and transports it back to the gas phase of the liquid reservoir 1. One end of the gas supply pipeline assembly is connected to the liquid phase of the liquid reservoir 1. The gas supply pipeline assembly converts liquid hydrogen into a gaseous state for gas supply. One end of the return pipe 5 is connected to the gas phase of the liquid reservoir 1, and the other end is a return port 51. A second valve 52 is provided on the return pipe 5.

[0028] The liquid hydrogen supply system proposed in this application involves adding liquid hydrogen to a reservoir 1 through a filling pipe 2. During the filling process, the gas inside the reservoir 1 is discharged through a return gas pipe 5 to maintain the internal pressure balance of the reservoir 1. After filling is completed, the gas supply pipeline assembly can be used to convert the liquid hydrogen into a gaseous state for gas supply. During long-term use, if the internal pressure of the reservoir 1 decreases, the liquid hydrogen is converted into a gaseous state through a pressurization pipeline assembly and transported back to the reservoir 1, thereby increasing the internal pressure of the reservoir 1 to meet the working pressure requirements and ensuring normal gas supply.

[0029] It should be noted that the gas phase pressure inside the liquid reservoir 1 needs to meet a certain value in order to force liquid hydrogen into the gas supply pipeline assembly and maintain a certain gas supply pressure. The pressurization pipeline assembly is connected to the bottom of the liquid reservoir 1. In this way, even if the gas phase pressure inside the liquid reservoir 1 is insufficient, liquid hydrogen can still flow into the pressurization pipeline assembly, be converted into a gaseous state, and be transported back to the gas phase of the liquid reservoir 1 to ensure the gas phase pressure inside the liquid reservoir 1 for gas supply.

[0030] In addition, when adding liquid hydrogen, the first valve 22 should be opened and liquid hydrogen should be added from the filling port 21. The second valve 52 should be opened appropriately to maintain the pressure inside the reservoir 1 to meet the working pressure requirements. After the filling is completed, the first valve 22 and the second valve 52 should be closed.

[0031] In an exemplary embodiment, the liquid hydrogen supply system may further include: a liquid level measuring sensor 71 and a gas phase pressure sensor 72, wherein the liquid level measuring sensor 71 is disposed in the liquid reservoir 1; and the gas phase pressure sensor 72 is in communication with the gas of the liquid reservoir 1.

[0032] Specifically, the liquid hydrogen level inside the reservoir 1 can be detected by the liquid level measurement sensor 71 to determine whether the filling is complete. Alternatively, the gas phase pressure sensor 72 can be used to determine whether the gas phase pressure inside the reservoir 1 meets the working pressure requirements, thereby determining whether to stop the pressurization pipeline assembly.

[0033] It should be noted that a pressure display 73 can also be set to display the pressure of the gas phase pressure sensor 72, and a liquid level display transmitter 74 can be set to display the liquid level height measured by the liquid level measuring sensor 71, so that the operator can observe it.

[0034] Furthermore, the specific liquid level and gas pressure values ​​inside the reservoir 1 can be transmitted to an external control system, such as a computer, tablet, or mobile phone, to enable intelligent control of the first valve 22, the second valve 52, and the pressurization pipeline components.

[0035] refer to Figure 2 In an exemplary embodiment, the pressurization pipeline assembly may include: a pressurization pipe 3, one end of which is connected to the liquid reservoir 1 and the other end of which is connected to the return gas pipe 5. The connection area between the pressurization pipe 3 and the return gas pipe 5 is located between the second valve 52 and the liquid reservoir 1. In the circuit composed of the pressurization pipe 3, the return gas pipe 5 and the liquid reservoir 1, the pressurization pipe 3 is sequentially provided with a third valve 31, a pressurization regulating valve 32 and a pressurization air-temperature heat exchanger 33, and the return gas pipe 5 is provided with a fourth valve 34.

[0036] Specifically, when the gas phase pressure in the liquid reservoir 1 is insufficient, the third valve 31 and the fourth valve 34 can be opened. Liquid hydrogen flows into the pressurization pipe 3 due to its own gravity and passes through the pressurization regulating valve 32 to reach the pressurization air-temperature heat exchanger 33, so that the liquid hydrogen is converted into a gaseous state and passes through the fourth valve 34 from the return gas pipe 5 to reach the gas phase in the liquid reservoir 1, thereby pressurizing the gas phase in the liquid reservoir 1.

[0037] It should be noted that the pressure regulating valve 32 can be set to close under high pressure and open under low pressure. For example, when the internal pressure of the reservoir 1 is lower than the working pressure, the pressure on the pressure regulating valve 32 is relatively small and it can open automatically; when the internal pressure of the reservoir 1 is greater than or equal to the working pressure, the pressure on the pressure regulating valve 32 is relatively large and it can close automatically.

[0038] In this way, during the pressurization process, once the gas phase pressure inside the reservoir 1 meets the working pressure requirements, the pressurization regulating valve 32 can be automatically closed to stop pressurization. Then, the third valve 31 and the fourth valve 34 can be closed to prevent the internal pressure of the reservoir 1 from being too high, and the pressurization operation is more convenient and faster.

[0039] The opening and closing of the pressure regulating valve 32 can be achieved through the valve body's own structure or through an external control system, which will not be elaborated here.

[0040] refer to Figure 3 In an exemplary embodiment, the gas supply pipeline assembly may include: a gas supply pipe 4, one end of which is connected to the liquid reservoir 1; wherein, in the direction away from the liquid reservoir 1, a fifth valve 41, a vaporizer 42, a buffer tank 43, and a pressure regulating valve 44 are sequentially arranged on the gas supply pipe 4.

[0041] Specifically, the vaporizer 42 can be a liquid air temperature vaporizer. When gas supply is required, the fifth valve 41 is opened, and the liquid hydrogen inside the liquid reservoir 1 is forced into the gas supply pipe 4. The liquid hydrogen is converted into a gaseous state through the vaporizer 42 and stored in the buffer tank 43. Gas supply can be provided by opening the pressure regulating valve 44. At the same time, the opening pressure of the pressure regulating valve 44 can also be adjusted to regulate the gas supply pressure and flow rate.

[0042] refer to Figure 3 In an exemplary embodiment, a gas supply flame arrester 45 is also provided on the gas supply pipe 4; wherein, on the gas supply pipe 4, the gas supply flame arrester 45 is located on the side of the pressure regulating valve 44 away from the liquid reservoir 1.

[0043] Specifically, when hydrogen is used as the combustion medium, installing a flame arrestor 45 on the gas supply pipe 4 can effectively prevent flame backflow and improve the safety of the gas supply system.

[0044] refer to Figure 1In an exemplary embodiment, the liquid hydrogen supply system may further include: a first pressure relief pipe 61 and a second pressure relief pipe 62, wherein the first pressure relief pipe 61 is connected to the liquid reservoir 1 and a first pressure relief valve 611 is provided on the first pressure relief pipe 61; the second pressure relief pipe 62 is connected to the liquid reservoir 1 and a second pressure relief valve 621 is provided on the second pressure relief pipe 62; wherein the opening pressure of the second pressure relief valve 621 is greater than the opening pressure of the first pressure relief valve 611.

[0045] Specifically, when the gas phase pressure inside the reservoir 1 is high, the first pressure relief valve 611 automatically opens, releasing the internal pressure of the reservoir 1 through the first pressure relief pipe 61. In other words, the opening pressure of the first pressure relief valve 611 should be greater than the working pressure requirement inside the reservoir 1.

[0046] When the gas phase pressure inside the liquid reservoir 1 is too high, both the second pressure relief valve 621 and the first pressure relief valve 611 open, and the pressure is quickly relieved through the first pressure relief pipe 61 and the second pressure relief pipe 62, thereby improving the safety of the gas supply system.

[0047] refer to Figure 1 In an exemplary embodiment, the liquid reservoir 1 may include: an inner container 11, an outer container 12, and an insulation layer 13. The outer container 12 is sleeved on the outer side of the inner container 11 and has a vacuum gap between it and the inner container 11. The insulation layer 13 is disposed between the inner container 11 and the outer container 12.

[0048] The double-layered liquid storage container 1 can significantly reduce the transfer of heat from the external environment to the inner container 11. In addition, the addition of the insulation layer 13 can further block heat transfer, ensuring that the liquid hydrogen temperature is maintained within a low range, which facilitates liquid hydrogen storage.

[0049] Specifically, the inner container 11 is made of austenitic stainless steel with a high nickel content. The inner container 11 is formed by rolling a cylinder, and the end caps are standard elliptical end caps. It is formed by welding, and the weld is subjected to non-destructive testing to meet the qualification requirements. Before welding, the liquid level measuring sensor 71 is installed in the inner container 11 cylinder.

[0050] In addition, after manufacturing, the inner container 11 undergoes degreasing treatment to reduce the presence of organic matter. Under constant temperature and humidity conditions, insulating material, i.e., the insulating layer 13, is wrapped around the inner container 11. After wrapping, the insulating layer 13 is positioned between the inner container 11 and the outer container 12. The outer container 12 is made of 304 stainless steel, with the cylindrical material rolled and both ends composed of standard elliptical caps. The outer liner is welded to ensure there is no leakage. A vacuum is then created between the outer container 12 and the inner container 11 using a molecular pump to achieve a high vacuum level below 0.01 Pa.

[0051] refer to Figure 4In an exemplary embodiment, the liquid hydrogen supply system may further include: a cold shield tube 8, which is divided into a winding part and a connecting part that are interconnected. The winding part is wound between the inner container 11 and the insulation layer 13 and is connected to the gas phase of the inner container 11. In the direction away from the winding part, a sixth valve 81 and a cold shield pressure valve 82 are sequentially provided on the connecting part.

[0052] Specifically, by opening the sixth valve 81 and the cold screen pressure valve 82, the hydrogen inside the inner container 11 can flow through the cold screen pipe 8 between the inner container 11 and the insulation layer 13, thereby carrying away the excess heat of the insulation layer 13 caused by thermal radiation, thus extending the liquid hydrogen storage time.

[0053] The opening pressure of the cold screen pressure valve 82 is less than the opening pressure of the first pressure relief valve 611 and the second pressure relief valve 621, ensuring that the hydrogen cold energy is fully utilized before the first pressure relief valve 611 is opened; of course, the opening pressure of the cold screen pressure valve 82 should also be greater than or equal to the working pressure of the inner container 11 to ensure that the inner container 11 can work normally.

[0054] In addition, the winding part is disc-shaped and evenly distributed between the inner container 11 and the insulation layer 13, so that the winding part and the insulation layer 13 are in full contact, so as to carry more heat when in use.

[0055] refer to Figure 1 In an exemplary embodiment, the liquid hydrogen supply system may further include: a discharge pipe 9, one end of which is connected to the filling pipe 2 and the other end is a discharge port 91, the connection area between the discharge pipe 9 and the filling pipe 2 is located between the filling port 21 and the first valve 22; wherein, a seventh valve 92 is provided on the discharge pipe 9.

[0056] Specifically, before adding liquid hydrogen, the first valve 22 can be closed and the seventh valve 92 opened to purge the filling pipe 2 and reduce residual air. After purging, the seventh valve 92 can be closed and the first valve 22 opened to proceed with the filling.

[0057] In addition, such as Figure 1 As shown, the ends of the cold shield tube 8, the first pressure relief tube 61, and the second pressure relief tube 62 used for exhaust can all be connected to the exhaust tube 9, so that the emitted hydrogen gas can be discharged uniformly from the exhaust port 91 for centralized treatment.

[0058] It should be understood that the connection area between the cold shield pipe 8, the first pressure relief pipe 61, and the second pressure relief pipe 62 and the discharge pipe 9 is located between the discharge port 91 and the seventh valve 92.

[0059] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A liquid hydrogen supply system, characterized in that, include: Liquid reservoir (1); The filling pipe (2) is connected to the gas phase of the liquid reservoir (1) at one end and the filling port (21) at the other end. A first valve (22) is provided on the filling pipe (2). The pressurization pipeline assembly is connected at one end to the bottom of the liquid reservoir (1) and at the other end to the gas phase of the liquid reservoir (1). The pressurization pipeline assembly converts liquid hydrogen into gas and transports it back to the gas phase of the liquid reservoir (1). The gas supply pipeline assembly is connected at one end to the liquid phase of the liquid reservoir (1), and the gas supply pipeline assembly converts liquid hydrogen into gas for gas supply. The return pipe (5) is connected to the gas phase of the liquid reservoir (1) at one end and the return port (51) at the other end. A second valve (52) is provided on the return pipe (5).

2. The liquid hydrogen supply system as described in claim 1, characterized in that, The booster piping assembly includes: The booster pipe (3) is connected at one end to the reservoir (1) and at the other end to the return pipe (5). The connection area between the booster pipe (3) and the return pipe (5) is located between the second valve (52) and the reservoir (1). In the circuit consisting of the booster pipe (3), the return pipe (5) and the liquid reservoir (1), the booster pipe (3) is provided with a third valve (31), a booster regulating valve (32) and a booster air-temperature heat exchanger (33) in sequence, and the return pipe (5) is provided with a fourth valve (34).

3. The liquid hydrogen supply system as described in claim 1, characterized in that, The gas supply pipeline assembly includes: An air supply pipe (4) is connected at one end to the liquid reservoir (1); In the direction away from the liquid reservoir (1), the gas supply pipe (4) is sequentially provided with a fifth valve (41), a vaporizer (42), a buffer tank (43), and a pressure regulating valve (44).

4. The liquid hydrogen supply system as described in claim 3, characterized in that, The gas supply pipe (4) is also equipped with a gas supply flame arrestor (45). In the gas supply pipe (4), the gas supply flame arrestor (45) is located on the side of the pressure regulating valve (44) away from the liquid reservoir (1).

5. The liquid hydrogen supply system as described in claim 1, characterized in that, The liquid hydrogen supply system also includes: The first pressure relief pipe (61) is connected to the liquid reservoir (1), and a first pressure relief valve (611) is provided on the first pressure relief pipe (61). The second pressure relief pipe (62) is connected to the liquid reservoir (1), and a second pressure relief valve (621) is provided on the second pressure relief pipe (62). The opening pressure of the second pressure relief valve (621) is greater than the opening pressure of the first pressure relief valve (611).

6. The liquid hydrogen supply system as described in claim 1, characterized in that, The liquid hydrogen supply system also includes: A liquid level sensor (71) is installed inside the liquid reservoir (1); A gas phase pressure sensor (72) is connected to the gas phase of the reservoir (1).

7. The liquid hydrogen supply system as described in claim 1, characterized in that, The liquid reservoir (1) includes: Content container (11); The outer container (12) is fitted over the inner container (11) and there is a vacuum gap between the outer container (11) and the inner container (11); An insulation layer (13) is disposed between the inner container (11) and the outer container (12).

8. The liquid hydrogen supply system as described in claim 7, characterized in that, The liquid hydrogen supply system also includes: The cold shield tube (8) is divided into a winding part and a connecting part that are interconnected. The winding part is wound between the inner container (11) and the insulation layer (13) and is connected to the gas phase of the inner container (11). In the direction away from the winding part, the connecting part is provided with a sixth valve (81) and a cold screen pressure valve (82) in sequence.

9. The liquid hydrogen supply system as described in claim 1, characterized in that, The liquid hydrogen supply system also includes: The discharge pipe (9) is connected to the filling pipe (2) at one end and the discharge port (91) at the other end. The connection area between the discharge pipe (9) and the filling pipe (2) is located between the filling port (21) and the first valve (22). The discharge pipe (9) is equipped with a seventh valve (92).

10. The liquid hydrogen supply system as described in claim 8, characterized in that, Both the inner container (11) and the outer container (12) are made of stainless steel.

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