Hydrogen fuel device

Abstract

The utility model provides a hydrogen fuel device which is applied to a liquid hydrogen storage and transportation ship and comprises a liquid hydrogen storage cabin, a hydrogen buffer system, a hydrogen fuel internal combustion engine, a liquid hydrogen pump and a vaporizer. The liquid hydrogen storage cabin is connected with one end of the liquid hydrogen pump through a first pipeline, and the other end of the liquid hydrogen pump is connected with an input port of the vaporizer; an output port of the vaporizer is connected with an input port of the hydrogen buffer system; and an output port of the hydrogen buffer system is connected with the hydrogen fuel internal combustion engine. Liquid hydrogen in the liquid hydrogen storage cabin is pumped out by using the liquid hydrogen pump and then is input into the hydrogen buffer system after being vaporized. Then an output port of the hydrogen buffer system is connected with the hydrogen fuel internal combustion engine, hydrogen in the liquid hydrogen storage tank is reasonably utilized to provide a hydrogen source for the hydrogen fuel internal combustion engine, a zero-emission power source can be provided through the ship hydrogen fuel system, and a ship driving device is pushed to work in a mode of efficient energy conversion and carbon footprint reduction; the purposes of providing green energy and reducing carbon emission are achieved, and the device is more environmentally friendly.

Description

Technical Field

[0001] The present disclosure relates to the technical field of fuel systems, and in particular to a hydrogen fuel device. Background Art

[0002] As a zero-carbon fuel, hydrogen can be stored in liquid or gaseous form, and finally supplied to hydrogen fuel cells or hydrogen fuel internal combustion engines as fuel to achieve zero nitrogen and carbon emissions. At present, high-pressure hydrogen is mainly stored in gas cylinders or gas tanks. Currently, marine hydrogen tanks can meet the specifications of 25MPA and 35MPA. The transportation temperature of liquid hydrogen can reach -253℃, and the requirements for storage tanks are higher than those for liquefied natural gas. Generally, double-shell vacuum insulated liquefied hydrogen storage tanks are used.

[0003] At present, there are very few liquid hydrogen storage and transportation ships in the world. In the future, as the green energy process accelerates, the use and transportation of clean energy will be a key development direction. my country prefers the research of hydrogen fuel cell ships, but due to the limitations of battery capacity and storage tank capacity, it is often used as auxiliary power and experimentally practiced on short-distance small ships, such as scientific research ships and tour ships. If it is used purely as a power propulsion, it often cannot meet the requirements of large ships. Therefore, conventional engines are still used to provide power propulsion on liquid hydrogen storage and transportation ships, and diesel generators are used to power the ships. Utility Model Content

[0004] The technical problem to be solved by the present disclosure is to provide a hydrogen fuel device in order to overcome the defect that the liquid hydrogen storage and transportation ship in the prior art uses a conventional engine to provide power for propulsion and pollutes the environment.

[0005] The present invention solves the above technical problems through the following technical solutions:

[0006] A first aspect provides a hydrogen fuel device for use on a liquid hydrogen storage and transportation ship, the hydrogen fuel device comprising a liquid hydrogen storage tank, a hydrogen buffer system, a hydrogen fuel internal combustion engine, a liquid hydrogen pump and a vaporizer;

[0007] The liquid hydrogen storage tank is connected to one end of the liquid hydrogen pump through a first pipeline, and the other end of the liquid hydrogen pump is connected to the input port of the vaporizer;

[0008] The output port of the vaporizer is connected to the input port of the hydrogen buffer system;

[0009] The output port of the hydrogen buffer system is connected to the hydrogen fuel internal combustion engine.

[0010] Optionally, an opening is provided on the top of the liquid hydrogen storage tank, the opening is connected to one end of a second pipeline, and the other end of the second pipeline is connected to an input port of the hydrogen buffer system;

[0011] Optionally, an evaporation gas compressor is provided in the second pipeline.

[0012] Optionally, the hydrogen fuel device further includes a compressed hydrogen gas cylinder, and the compressed hydrogen gas cylinder is connected to the input port of the hydrogen buffer system through a third pipeline.

[0013] Optionally, a temperature and pressure regulating device is further provided at the air inlet of the hydrogen buffer system.

[0014] Optionally, a hydrogen supply device is further provided at the output port of the hydrogen buffer system.

[0015] Optionally, the output port of the hydrogen buffer system is further connected to a hydrogen fuel generator through a fourth pipeline.

[0016] Optionally, the output port of the hydrogen buffer system is further connected to a hydrogen fuel cell through a fifth pipeline.

[0017] Optionally, the temperature and pressure regulating device is further connected to the hydrogen fuel cell through a sixth pipeline.

[0018] Optionally, the hydrogen fuel device further includes a lithium battery system, and the lithium battery system is connected to the hydrogen fuel cell.

[0019] Optionally, the hydrogen buffer system includes a hydrogen buffer tank, the hydrogen buffer tank is a double-layer shell structure of an inner shell and an outer shell, a vacuum insulation layer is provided between the inner and outer shells, and a heat preservation structure is provided on the outer wall of the outer shell;

[0020] Optionally, a waterproof layer is coated on the outer layer of the heat preservation structure.

[0021] Optionally, the hydrogen fuel device includes at least two hydrogen buffer tanks, an input and output pipeline is provided on the outside of each hydrogen buffer tank, and the hydrogen buffer tanks are connected to each other through the input and output pipelines;

[0022] Optionally, the input and output pipelines between the hydrogen buffer tanks are double-walled pipes.

[0023] Optionally, a gas combustion discharge port is further provided on the box body of the hydrogen buffer system;

[0024] Optionally, a spray pipe is provided on the periphery of the box body of the hydrogen buffer system.

[0025] Optionally, the hydrogen buffer system further includes a controller and a temperature sensor, temperature sensors are provided on the inner wall and the outer wall of the hydrogen buffer system; the controller is electrically connected to the temperature sensor;

[0026] Optionally, the hydrogen buffer system further includes a cooling module, and the controller is electrically connected to the cooling module;

[0027] Optionally, the hydrogen buffer system further includes an alarm module, and the controller is electrically connected to the alarm module.

[0028] Based on common knowledge in the art, the above preferred conditions can be combined arbitrarily to obtain various preferred examples of the present disclosure.

[0029] The positive and progressive effects of the present disclosure are as follows: After extracting liquid hydrogen from the liquid hydrogen storage tank using a liquid hydrogen pump, it is vaporized and then input into the hydrogen buffer system. Then, through the output port of the hydrogen buffer system, it is connected to a hydrogen fuel internal combustion engine, reasonably utilizing the hydrogen in the liquid hydrogen storage tank to provide a hydrogen source for the hydrogen fuel internal combustion engine. The ship hydrogen fuel system can provide a zero-emission power source and drive the ship drive device in a way of efficient energy conversion and reduced carbon footprint, achieving the purpose of providing green energy and reducing carbon emissions, which is more environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 FIG. 1 is a schematic structural diagram of a hydrogen fuel device provided by an exemplary embodiment of the present disclosure;

[0031] Figure 2 FIG. 2 is a schematic system structural diagram of a hydrogen fuel device provided by an exemplary embodiment of the present disclosure;

[0032] Figure 3 FIG. 3 is a schematic structural diagram of a hydrogen buffer system provided by an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The present disclosure will be further described below by way of examples, but the present disclosure is not limited to the scope of the described examples.

[0034] In the embodiments of the present disclosure, prefix words such as "first" and "second" are only used to distinguish different described objects, and have no limiting effect on the position, order, priority, quantity, or content of the described objects. The use of ordinal words and other prefix words for distinguishing described objects in the embodiments of the present disclosure does not constitute a limitation on the described objects. The statements of the described objects refer to the description in the claims or the context of the embodiments, and should not constitute unnecessary limitations due to the use of such prefix words. In addition, in the description of this embodiment, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0035] Figure 1Schematic structural diagram of a hydrogen fuel device provided by an exemplary embodiment of the present disclosure. The hydrogen fuel device is applied to a liquid hydrogen storage and transportation ship. The hydrogen fuel device includes a liquid hydrogen storage tank 101, a hydrogen buffer system 102, a hydrogen fuel internal combustion engine 103, a liquid hydrogen pump 104, and a vaporizer 105. The liquid hydrogen storage tank 101 is connected to one end of the liquid hydrogen pump 104 through a first pipeline. The other end of the liquid hydrogen pump 104 is connected to the input port of the vaporizer 105. The output port of the vaporizer 105 is connected to the input port of the hydrogen buffer system 102. The output port of the hydrogen buffer system 102 is connected to the hydrogen fuel internal combustion engine 103.

[0036] Specifically, the liquid hydrogen storage tank 101 is a container for storing liquid hydrogen or compressed hydrogen, such as a liquid hydrogen storage tank or a hydrogen pressure vessel. The liquid hydrogen pump 104 is used to pump liquid hydrogen out of the liquid hydrogen storage tank and then send it into the vaporizer 105. The vaporizer 105 is used to convert liquid hydrogen into gaseous hydrogen and supply it to the hydrogen buffer system 102. The hydrogen buffer system 102 sends the stored hydrogen into the hydrogen fuel internal combustion engine 103, and the hydrogen internal combustion engine converts the chemical energy of hydrogen combustion into mechanical power to drive the ship's propeller or other propulsion devices. The liquid hydrogen storage tank 101 and the hydrogen buffer system 102 are both arranged on the upper deck of the ship.

[0037] In this embodiment, after using a liquid hydrogen pump to pump out the liquid hydrogen in the liquid hydrogen storage tank, it is vaporized and then input into the hydrogen buffer system. Then, through the output port of the hydrogen buffer system connected to the hydrogen fuel internal combustion engine, the hydrogen in the liquid hydrogen storage tank is reasonably utilized to provide a hydrogen source for the hydrogen fuel internal combustion engine. Through the ship's hydrogen fuel system, a zero-emission power source can be provided, and the ship's driving device can be driven in a way of efficient energy conversion and reduced carbon footprint, achieving the purpose of providing green energy and reducing carbon emissions, which is more environmentally friendly.

[0038] In one embodiment, an opening is provided at the top of the liquid hydrogen storage tank 101. The opening is connected to one end of a second pipeline, and the other end of the second pipeline is connected to the input port of the hydrogen buffer system 102;

[0039] Specifically, in the liquid hydrogen storage tank 101, due to problems such as changes in sea conditions and fluctuations in air temperature, a large amount of gaseous hydrogen, i.e., boil-off gas (BOG), will be generated. Generally, there are three main methods for treating BOG: pressure maintenance, reliquefaction, and combustion. Pressure maintenance means restricting the BOG in the liquid hydrogen storage tank without discharging it, which poses a certain challenge to the design pressure capacity of the storage tank to a certain extent. Reliquefaction is to send the BOG to the boil-off gas compressor. After being pressurized by the boil-off gas compressor, the condensed BOG is turned into liquid hydrogen through a condenser and pumped back into the liquid hydrogen storage tank. Combustion means sending the excessive generated BOG gas to a gas combustion unit (GCU) for consumption and combustion. Therefore, in order to reduce the number of times of pressure maintenance, reliquefaction, and combustion treatment of BOG in the liquid hydrogen storage tank, a second pipeline is provided at the top of the liquid hydrogen storage tank 101, and the other end of the second pipeline is connected to the input port of the hydrogen buffer system 102 for storing a part of the self-evaporated gas of the liquid hydrogen storage tank in the hydrogen buffer system.

[0040] In one embodiment, the second pipeline is also provided with a boil-off gas compressor 106. Through the boil-off gas compressor 106, the BOG is compressed and the compressed BOG is sent into the hydrogen buffer system 102.

[0041] In this embodiment, by collecting the gaseous hydrogen of the BOG and sending the BOG into the hydrogen buffer system 102, the number of times of pressure maintenance, reliquefaction, and combustion treatment of the boil-off gas in the liquid hydrogen storage tank is reduced, further improving the utilization efficiency of liquid hydrogen and the energy utilization rate.

[0042] In one embodiment, the hydrogen fuel device further includes a compressed hydrogen cylinder 107, and the compressed hydrogen cylinder 107 is connected to the input port of the hydrogen buffer system 102 through a third pipeline.

[0043] Specifically, the ship can be equipped with its own compressed hydrogen cylinders, and the number of compressed hydrogen cylinders and liquid hydrogen storage tanks depends on the requirements of the ship. The compressed hydrogen cylinders are arranged on the upper deck of the ship.

[0044] In this embodiment, when the gaseous hydrogen in the hydrogen buffer system is insufficient, the hydrogen buffer system can also be supplemented by the hydrogen cylinders.

[0045] In one embodiment, a temperature and pressure regulating device 108 is further provided at the air inlet of the hydrogen buffer system 102.

[0046] Specifically, the hydrogen source of the hydrogen buffer tank system consists of three parts: the evaporated gas spontaneously generated in the liquid hydrogen storage tank; the hydrogen in the compressed hydrogen cylinders; and the hydrogen after the liquid hydrogen in the liquid hydrogen storage tank is extracted and processed by a vaporizer. A temperature and pressure regulating device is provided at the inlet of the hydrogen buffer system. Different sources of hydrogen can be uniformly temperature- and pressure-regulated and then enter the hydrogen buffer system. The temperature and pressure regulating device can be composed of a heat exchanger, a compressor, etc. This embodiment does not involve improving the specific algorithm for temperature and pressure regulation and uses related technologies to implement it.

[0047] In this embodiment, by uniformly processing different sources of hydrogen through the temperature and pressure regulating device and then entering the hydrogen buffer system, the stability of hydrogen in the hydrogen buffer system is improved.

[0048] In one embodiment, the output port of the hydrogen buffer system 102 is also connected to the hydrogen fuel generator 109 through a fourth pipeline.

[0049] Specifically, the hydrogen buffer system 102 can also provide hydrogen fuel for the hydrogen fuel generator 109. The hydrogen fuel generator 109 can use the electricity in the electric drive system of the ship. The electric drive system of the ship can distribute the electricity to the power supply system or the electric drive system of the ship.

[0050] In one embodiment, the output port 102 of the hydrogen buffer system is also connected to the hydrogen fuel cell 110 through a fifth pipeline.

[0051] Specifically, the hydrogen fuel cell system includes a fuel cell stack, an oxygen storage device, and a cooling system. The fuel cell stack is used to carry out an electrochemical reaction between hydrogen and oxygen or air under the action of a catalyst to generate electric energy. The oxygen storage device of the hydrogen fuel cell is used to store oxygen for supply to the fuel cell reaction. In the case of insufficient air and a chemical reaction with hydrogen, the oxygen storage device plays a role in supplying gaseous hydrogen to the fuel cell stack; the cooling system of the hydrogen fuel cell is used to cool the fuel cell stack and the catalyst to provide a suitable working temperature and prevent overheating. The electric drive system in the ship consists of multiple drive devices: the electric energy generated by the hydrogen fuel cell is converted into mechanical power to drive the propeller or other propulsion devices of the ship. The number of hydrogen fuel cells can be determined according to the requirements of the ship, and there is an enclosed area around the hydrogen fuel cells.

[0052] In this embodiment, the hydrogen buffer system can provide hydrogen fuel for the hydrogen fuel cell for each power system in the ship.

[0053] In one embodiment, the temperature and pressure regulating device 108 is also connected to the hydrogen fuel cell 110 through a sixth pipeline.

[0054] In this embodiment, the hydrogen gas processed by the temperature and pressure regulating device 108 is directly supplied to the hydrogen fuel cell 109 as a basic load, which can replace the conventional diesel generator set load or the emergency generator load.

[0055] In one embodiment, a hydrogen gas supply device 111 is further provided at the output port of the hydrogen gas buffer system.

[0056] Specifically, Figure 2 FIG. is a schematic structural diagram of a hydrogen fuel device provided by an exemplary embodiment of the present disclosure. As shown in the figure, the hydrogen gas buffer system further includes a hydrogen gas supply device and a central control system. The hydrogen gas supply device includes a hydrogen gas pump, a hydrogen gas transportation pipeline, etc. The central control system is coordinated and linked with the hydrogen gas supply device, the fuel cell system, the hydrogen fuel main unit, and the hydrogen fuel generator unit. Its main function is to control the gas supply volume between the above units and systems. A safety alarm is set between the hydrogen gas buffer system and the hydrogen gas supply device to prompt whether it is necessary to increase the gas volume emergently or cut off the gas supply when the gas supply volume is insufficient or excessive. Among them, the central control system is composed of a control unit and a hydrogen gas management system. The control unit is used to monitor, coordinately control, and allocate the gas volume replenishment operation among the hydrogen fuel cell, the hydrogen fuel generator, and the hydrogen fuel internal combustion engine to provide the best performance and efficiency. The hydrogen gas management system is used to monitor and manage the input and output gas volume values of each system port to ensure safe operation and avoid the occurrence of insufficient gas or excessive gas.

[0057] In this embodiment, the hydrogen gas in the hydrogen gas buffer system is controlled and allocated to each hydrogen fuel cell, hydrogen fuel generator, and hydrogen fuel internal combustion engine through the hydrogen gas supply device to provide the best performance and efficiency.

[0058] In one embodiment, the hydrogen fuel device further includes a lithium battery system 112, and the lithium battery system is connected to the hydrogen fuel cell.

[0059] Specifically, in the electric drive system of a ship, the power comes from one or more of a hydrogen fuel generator, a fuel cell system, and a lithium battery. The electric drive system assists power propulsion devices such as a thruster system, an energy storage system, a lighting system, etc. According to the size of the ship power station and the navigation distance requirements selected by the hydrogen fuel cell, there are two options: (1) If a hydrogen fuel cell is used on a medium or small ship, it can directly replace an emergency fuel generator set. Under emergency conditions, the hydrogen gas buffer system and the hydrogen gas supply device still work to continuously supply hydrogen to the hydrogen fuel cell system to ensure emergency power operation, saving a certain amount of space and fuel consumption, and also being relatively environmentally friendly; (2) If a hydrogen fuel cell is used on a large ocean-going ship and is used in conjunction with a lithium battery, it can supply power to small loads such as the lighting system on the ship, and can also charge the energy storage system on the ship, such as an uninterruptible power supply, a storage battery, etc.

[0060] In this embodiment, a lithium battery system is used to compensate for the peak-to-peak working voltage of a fuel cell system, enabling the hydrogen fuel cell system and the lithium battery system to complement and cooperate with each other to maintain the normal operation of the ship power station.

[0061] Figure 3 FIG. 4 is a schematic structural diagram of a hydrogen buffer system provided by an exemplary embodiment of the present disclosure. The hydrogen buffer system includes a hydrogen buffer tank 201. The hydrogen buffer tank 201 has a double-layer housing structure of an inner shell and an outer shell. A vacuum insulation layer is provided between the inner and outer shells, and the outer wall of the outer shell has a heat insulation structure.

[0062] Specifically, the heat insulation material is used to reduce heat transfer and heat loss inside and around the cabin. The hydrogen buffer tank 201 is placed separately in an independent cabin, and an isolation and explosion-proof structure is provided around the hydrogen buffer tank. The isolation of the hydrogen buffer system is used to physically and explosion-proof isolate the hydrogen buffer system device from other cabins to ensure safety.

[0063] In one embodiment, a waterproof layer is coated on the outer layer of the heat insulation structure to prevent the influence of water on the hydrogen buffer system.

[0064] In one embodiment, the hydrogen buffer tanks are connected by input and output pipelines for the transportation of hydrogen. After the input port 202 of the hydrogen buffer system receives hydrogen, it is stored in multiple hydrogen buffer tanks and discharged outward from the output port 203 of the hydrogen buffer system when needed.

[0065] In one embodiment, the input and output pipelines between the hydrogen buffer tanks are double-walled pipes to prevent potential safety hazards of hydrogen leakage.

[0066] In one embodiment, the hydrogen buffer system is further provided with a gas combustion discharge port 204. The function of the gas combustion unit is to burn the excess hydrogen, and the discharge port is connected to the ship's ventilation mast.

[0067] In one embodiment, a spray pipe 205 is provided around the outer periphery of the box body of the hydrogen buffer system, and spray nozzles 206 are evenly arranged on the spray pipe.

[0068] Specifically, a uniformly distributed spray pipe system is provided around the entire device structure of the hydrogen buffer system, and an intelligent control system for controlling the spraying of the spray pipe system after the insulation of the buffer tank fails. The spray nozzles of the spray pipe system are arranged at regular intervals around the upper part. The sprayed seawater converges into the ship's sewage well and is discharged or reused after treatment through the pipe system.

[0069] In one embodiment, the hydrogen buffer system further includes a controller 207 and temperature sensors. Temperature sensors are provided on the inner and outer walls of the hydrogen buffer system; the controller is electrically connected to the temperature sensors.

[0070] In one embodiment, the hydrogen buffer system further includes a cooling module, and the controller is electrically connected to the cooling module.

[0071] Specifically, the temperature sensors are used to comprehensively monitor the temperature inside and outside the buffer tank, and are arranged on the inner wall of the buffer tank and outside the system. The controller controls the operation of the cooling system according to the signals of the monitored temperature sensors, and the cooling system controls the temperature inside and outside the buffer tank by circulating cooling liquid or air.

[0072] In one embodiment, the hydrogen buffer system further includes a remote monitoring module, and the controller is electrically connected to the remote monitoring module.

[0073] Remote monitoring is used to connect the temperature data inside and outside the tank and the controller to a remote monitoring platform, so that the ship's operators can monitor the temperature at any time and make necessary adjustments.

[0074] In one embodiment, the hydrogen buffer system further includes an alarm module, and the controller is electrically connected to the alarm module.

[0075] The alarm module consists of multiple alarms and warning lights. The alarm module is used to trigger an alarm when the temperature inside and outside the buffer tank exceeds the preset range, and notify in the form of a sound alarm, a visual warning light, etc.

[0076] An in-situ fuel control system is provided on the outside of the hydrogen buffer system to control the coordinated operation of each component and system. A remote control unit is provided in the cab or the centralized control room, which can also control the operation.

[0077] In this embodiment, since the hydrogen buffer system is a composite integrated type, it is convenient for maintenance. And it has characteristics such as an isolation explosion-proof structure, heat-insulating materials, temperature sensors, a temperature control operation system, and an alarm system. The temperature inside and outside the hydrogen buffer tank is adjusted by controlling the cooling system, and an alarm system is set up to detect abnormalities in time. Regular maintenance and remote monitoring functions can ensure the normal operation and safety of the system, and facilitate the operators to take necessary measures in time, making the use of hydrogen fuel more stable and reliable and reducing the use risk.

[0078] Although the specific embodiments of the present disclosure have been described above, those skilled in the art should understand that this is only an example. The protection scope of the present disclosure is defined by the appended claims. Without departing from the principles and essence of the present disclosure, those skilled in the art can make various changes or modifications to these embodiments, but these changes and modifications all fall within the protection scope of the present disclosure.

Claims

1. A hydrogen fuel device, characterized in that: Applied to liquid hydrogen storage and transportation ships, the hydrogen fuel device includes a liquid hydrogen storage tank, a hydrogen buffer system, a hydrogen fuel internal combustion engine, a liquid hydrogen pump and a vaporizer; The liquid hydrogen storage tank is connected to one end of the liquid hydrogen pump through a first pipeline, and the other end of the liquid hydrogen pump is connected to the input port of the vaporizer; The output port of the vaporizer is connected to the input port of the hydrogen buffer system; The output port of the hydrogen buffer system is connected to the hydrogen fuel internal combustion engine.

2. The hydrogen fuel device according to claim 1, characterized in that: An opening is provided on the top of the liquid hydrogen storage tank, the opening is connected to one end of a second pipeline, and the other end of the second pipeline is connected to an input port of the hydrogen buffer system; And / or the second pipeline is provided with an evaporation gas compressor.

3. The hydrogen fuel device according to claim 1, characterized in that: The hydrogen fuel device also includes a compressed hydrogen cylinder, which is connected to the input port of the hydrogen buffer system through a third pipeline.

4. The hydrogen fuel device according to claim 1, characterized in that: The air inlet of the hydrogen buffer system is also provided with a temperature and pressure regulating device; And / or the output port of the hydrogen buffer system is also provided with a hydrogen supply device.

5. The hydrogen fuel device according to claim 4, characterized in that: The output port of the hydrogen buffer system is also connected to the hydrogen fuel generator through a fourth pipeline; and / or the output port of the hydrogen buffer system is also connected to the hydrogen fuel cell via a fifth pipeline; And / or the temperature and pressure regulating device is also connected to the hydrogen fuel cell via a sixth pipeline.

6. The hydrogen fuel device according to claim 5, characterized in that: The hydrogen fuel device also includes a lithium battery system, which is connected to the hydrogen fuel cell.

7. The hydrogen fuel device according to claim 1, characterized in that: The hydrogen buffer system comprises a hydrogen buffer box, which is a double-layer shell structure of an inner shell and an outer shell, a vacuum insulation layer is provided between the inner shell and the outer shell, and an outer wall of the outer shell has a heat preservation structure; And / or the outer layer of the thermal insulation structure is coated with a waterproof layer.

8. The hydrogen fuel device according to claim 7, characterized in that: The hydrogen fuel device comprises at least two hydrogen buffer boxes, each of which is provided with an input and an output pipeline on the outside, and the hydrogen buffer boxes are connected to each other through the input and the output pipeline; And / or the input and output pipes between the hydrogen buffer tanks are double-walled pipes.

9. The hydrogen fuel device according to claim 1, characterized in that: The box of the hydrogen buffer system is also provided with a gas combustion outlet; And / or a spray pipe is provided on the periphery of the box of the hydrogen buffer system.

10. The hydrogen fuel device according to claim 1, characterized in that: The hydrogen buffer system further comprises a controller and a temperature sensor. The inner wall and the outer wall of the hydrogen buffer system are provided with temperature sensors; the controller is electrically connected to the temperature sensor; And / or the hydrogen buffer system further includes a cooling module, and the controller is electrically connected to the cooling module; And / or the hydrogen buffer system further includes an alarm, and the controller is electrically connected to an alarm module.

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