A fuel cell hydrogen supply system for a vehicle

Abstract

This invention relates to a fuel cell hydrogen supply system for aircraft, comprising a raw material storage hydrogen supply unit, an organic liquid hydrogen supply unit, and an alloy hydrogen storage unit. The organic liquid hydrogen supply unit is connected to the raw material storage hydrogen supply unit and has a first outlet and a second outlet. The alloy hydrogen storage unit includes an externally immersed alloy hydrogen storage tank, which has an outlet for discharging hydrogen and an inlet that can be connected to the first outlet of the organic liquid hydrogen supply unit. When the hydrogen storage metal in the externally immersed alloy hydrogen storage tank is depleted, the raw material storage hydrogen supply unit is replenished with hydrogen storage organic liquid. The outlet of the externally immersed alloy hydrogen storage tank is closed and the inlet is opened. At this time, the hydrogen generated in the organic liquid hydrogen supply unit is introduced into the externally immersed alloy hydrogen storage tank, which can regenerate the hydrogen storage metal. Only the hydrogen storage organic liquid needs to be replenished to complete the replenishment of the organic liquid hydrogen supply unit and the alloy hydrogen storage unit, making it convenient to use.

Description

Technical Field

[0001] This invention relates to the field of hydrogen storage technology, and in particular to a fuel cell hydrogen supply system for aircraft. Background Technology

[0002] The hydrogen supply system is a crucial component of a hydrogen fuel cell system. The hydrogen storage density and quantity directly determine the energy storage density and continuous operating time of the hydrogen supply system, thus determining the submersible's range. Domestic and international researchers have conducted extensive research on hydrogen storage technology for submersible fuel cells, with high-pressure gaseous hydrogen storage and cryogenic liquid hydrogen storage currently being the main methods. However, high-pressure hydrogen storage has low storage density and requires a high level of hydrogen resupply assurance, while cryogenic liquid hydrogen storage has a high daily evaporation rate (1.0wt%–2.0wt% / day) and is difficult to miniaturize, making it unsuitable for confined space environments.

[0003] To meet the hydrogen supply requirements of closed environments, organic liquid hydrogen storage technology can be used, which has the characteristics of high hydrogen storage density, convenient raw material storage and transportation, and no tail gas emission. However, the organic liquid hydrogen storage requires external heating during the dehydrogenation process.

[0004] For example, the invention patent with application number CN202010968959.X proposes an organic liquid hydrogen supply system for a closed environment. Hydrogen containing water vapor is obtained by hydrolyzing metal hydrides. The water vapor content is adjusted by the ratio of water to metal hydride. Hydrogen, water vapor and oxygen undergo an oxidation reaction. Under the dilution effect of inert gas water vapor, hydrogen-oxygen catalytic combustion is carried out safely and stably under low temperature (≤500℃). The heat of hydrolysis and the heat of hydrogen-oxygen combustion are used to heat the organic liquid for dehydrogenation.

[0005] However, the aforementioned hydrogen supply system requires the replenishment of hydrogen storage metal to the metal hydride treatment tank, which is inconvenient to use. Summary of the Invention

[0006] In view of this, it is necessary to provide a fuel cell hydrogen supply system for aircraft to solve the problem that existing hydrogen supply systems require the replenishment of hydrogen storage metals in metal hydride processing tanks, which is inconvenient to use.

[0007] This invention provides a hydrogen supply system for a fuel cell used in aircraft, comprising a raw material storage hydrogen supply unit, an organic liquid hydrogen supply unit, and an alloy hydrogen storage unit. The raw material storage hydrogen supply unit contains a hydrogen-storing organic liquid. The organic liquid hydrogen supply unit is connected to the raw material storage hydrogen supply unit and is used to receive the hydrogen-storing organic liquid discharged from the raw material storage hydrogen supply unit. The organic liquid hydrogen supply unit has a first outlet and a second outlet. The organic liquid hydrogen supply unit performs dehydrogenation treatment on the hydrogen-storing organic liquid to form hydrogen gas discharged from the first outlet and a liquid hydrogen storage carrier discharged from the second outlet, respectively. The alloy hydrogen storage unit includes an externally immersed alloy hydrogen storage tank. The externally immersed alloy hydrogen storage tank has an outlet for discharging hydrogen gas and an inlet that can be connected to the first outlet of the organic liquid hydrogen supply unit. When the outlet of the externally immersed alloy hydrogen storage tank is open and the inlet is closed, the hydrogen storage metal inside releases hydrogen. When the outlet of the externally immersed alloy hydrogen storage tank is closed and the inlet is open, the hydrogen storage metal inside stores hydrogen.

[0008] Furthermore, the raw material storage and hydrogen supply unit includes a sliding partition, a raw material storage tank, and a metering pump. The sliding partition is built into the raw material storage tank and slides vertically and is sealed to the raw material storage tank. The sliding partition divides the interior of the raw material storage tank into a first storage chamber for storing liquid hydrogen storage carriers and a second storage chamber for storing hydrogen-containing organic liquids. The second storage chamber is connected to the organic liquid hydrogen supply unit via the metering pump.

[0009] Furthermore, the organic liquid hydrogen supply unit includes an integrated dehydrogenation reactor and an oxygen source. The integrated dehydrogenation reactor is connected to the raw material storage hydrogen supply unit and the oxygen source, and a discharge port is formed on the integrated dehydrogenation reactor.

[0010] Furthermore, the organic liquid hydrogen supply unit also includes a heat exchanger and a gas-liquid separator. The heat exchanger has a first heat exchange chamber and a second heat exchange chamber. The raw material storage hydrogen supply unit is connected to the integrated dehydrogenation reactor via the first heat exchange chamber. The discharge port of the integrated dehydrogenation reactor is connected to the second heat exchange chamber of the heat exchanger. The hydrogen-storing organic liquid in the first heat exchange chamber exchanges heat with the hydrogen and liquid hydrogen storage carrier in the second heat exchange chamber. The gas-liquid separator is connected to the second heat exchange chamber and has a first discharge port and a second discharge port.

[0011] Furthermore, the organic liquid hydrogen supply unit also includes a hydrogen buffer tank, the first outlet of the gas-liquid separator is connected to the inlet of the hydrogen buffer tank or the external immersion alloy hydrogen storage tank, and the outlet of the external immersion alloy hydrogen storage tank is connected to the hydrogen buffer tank.

[0012] Furthermore, the organic liquid hydrogen supply unit also includes a first solenoid valve, a second solenoid valve, and a third solenoid valve. The first outlet of the gas-liquid separator is connected to the hydrogen buffer tank via the first solenoid valve. The first outlet of the gas-liquid separator is connected to the inlet of the externally immersed alloy hydrogen storage tank via the second solenoid valve. The outlet of the externally immersed alloy hydrogen storage tank is connected to the hydrogen buffer tank via the third solenoid valve.

[0013] Furthermore, it also includes a fourth solenoid valve. The hydrogen buffer tank has a hydrogen supply end and a reflux branch. The hydrogen supply end is connected to the fuel cell module. One end of the reflux branch is connected to the hydrogen supply end, and the other end of the reflux branch is connected to the integrated dehydrogenation reactor. The fourth solenoid valve is installed on the reflux branch.

[0014] Furthermore, it also includes a hydrogen mass flow controller, which is installed on the return branch.

[0015] Furthermore, the alloy storage unit also includes a liquid storage tank, and the external immersion alloy hydrogen storage tank is built into the liquid storage tank. The liquid storage tank is connected to the second outlet of the organic liquid hydrogen supply unit. The interior of the liquid storage tank is connected to the external immersion alloy hydrogen storage tank via the water supply component, so as to introduce water in the liquid storage tank into the external immersion alloy hydrogen storage tank.

[0016] Furthermore, the number of the externally immersed alloy hydrogen storage tanks is multiple.

[0017] Compared with existing technologies, when the outlet of the externally immersed alloy hydrogen storage tank is open and the inlet is closed, the hydrogen storage metal in the externally immersed alloy hydrogen storage tank absorbs heat and releases hydrogen to supply the fuel cell module. At the same time, the organic liquid hydrogen supply unit can dehydrogenate the hydrogen storage organic liquid stored in the raw material storage hydrogen supply unit, and the generated hydrogen is supplied to the fuel cell module. Hydrogen can be supplied to the fuel cell module by means of hydrogen storage metal and / or hydrogen storage organic liquid. When the hydrogen storage metal in the externally immersed alloy hydrogen storage tank is depleted, it is only necessary to replenish the hydrogen storage organic liquid in the raw material storage hydrogen supply unit and control the outlet of the externally immersed alloy hydrogen storage tank to be closed and the inlet to be opened. At this time, the hydrogen generated in the organic liquid hydrogen supply unit is introduced into the externally immersed alloy hydrogen storage tank. By controlling the temperature and pressure of the externally immersed alloy hydrogen storage tank, hydrogen storage metal can be regenerated. Only the replenishment of the hydrogen storage organic liquid is needed to complete the replenishment of the organic liquid hydrogen supply unit and the alloy hydrogen storage unit, reducing the types of raw materials supplied and making it convenient to use. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a fuel cell hydrogen supply system for aircraft provided in an embodiment of the present invention. Detailed Implementation

[0019] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0020] like Figure 1 As shown, the present invention provides a fuel cell hydrogen supply system for aircraft, comprising a raw material storage and hydrogen supply unit 10, an organic liquid hydrogen supply unit 20, and an alloy hydrogen storage unit 30. The raw material storage and hydrogen supply unit 10 contains a hydrogen-storing organic liquid. The organic liquid hydrogen supply unit 20 is connected to the raw material storage and hydrogen supply unit 10 and is used to receive the hydrogen-storing organic liquid discharged from the raw material storage and hydrogen supply unit 10. The organic liquid hydrogen supply unit 20 has a first outlet and a second outlet, and performs dehydrogenation treatment on the hydrogen-storing organic liquid. Hydrogen gas is discharged from the first outlet and liquid hydrogen storage carriers are discharged from the second outlet, respectively. The alloy hydrogen storage unit 30 includes an externally immersed alloy hydrogen storage tank 302, which has an outlet for discharging hydrogen gas and an inlet that can be connected to the first outlet of the organic liquid hydrogen supply unit 20. When the outlet of the externally immersed alloy hydrogen storage tank 302 is opened and the inlet is closed, the hydrogen storage metal inside releases hydrogen. When the outlet of the externally immersed alloy hydrogen storage tank 302 is closed and the inlet is opened, the hydrogen storage metal inside stores hydrogen.

[0021] In practice, when the outlet of the externally immersed alloy hydrogen storage tank 302 is open and the inlet is closed, the hydrogen storage metal in the externally immersed alloy hydrogen storage tank 302 absorbs heat and releases hydrogen to supply the fuel cell module. Simultaneously, the organic liquid hydrogen supply unit 20 can dehydrogenate the hydrogen storage organic liquid stored in the raw material storage hydrogen supply unit 10, and the generated hydrogen is supplied to the fuel cell module. Hydrogen can be supplied to the fuel cell module using hydrogen storage metal and / or hydrogen storage organic liquid. When the hydrogen storage metal in the externally immersed alloy hydrogen storage tank 302 is consumed... After completion, simply replenish the hydrogen storage organic liquid in the raw material storage hydrogen supply unit 10 and control the outlet of the external immersion alloy hydrogen storage tank 302 to be closed and the inlet to be opened. At this time, the hydrogen generated in the organic liquid hydrogen supply unit 20 is introduced into the external immersion alloy hydrogen storage tank 302. By controlling the temperature and pressure of the external immersion alloy hydrogen storage tank 302, hydrogen storage metal can be regenerated. Only replenishing the hydrogen storage organic liquid is needed to complete the replenishment of the organic liquid hydrogen supply unit and the alloy hydrogen storage unit 30, reducing the types of raw materials supplied and making it convenient to use.

[0022] In this embodiment, the raw material storage and hydrogen supply unit 10 is a structure for storing hydrogen-containing organic liquid.

[0023] In one embodiment, the raw material storage and hydrogen supply unit 10 includes a sliding partition 101, a raw material storage tank 102, and a metering pump 103. The sliding partition 101 is built into the raw material storage tank 102 and slides vertically and is sealed to the raw material storage tank 102. The sliding partition 101 divides the interior of the raw material storage tank 102 into a first storage chamber for storing a liquid hydrogen storage carrier and a second storage chamber for storing a hydrogen storage organic liquid. The second storage chamber is connected to the organic liquid hydrogen supply unit 20 via the metering pump 103.

[0024] In the initial stage of hydrogen supply, the raw material storage tank 102 is filled with hydrogen-storing organic liquid. The sliding baffle 101 is located at the top of the raw material storage tank 102. The content of hydrogen-storing organic liquid in the raw material storage tank 102 can be known by the height of the sliding baffle 101.

[0025] It is understood that the shape of the raw material storage tank 102 is not limited in this embodiment. For example, the radial cross section of the raw material storage tank 102 can be square, rectangular, etc.

[0026] The organic liquid hydrogen supply unit 20 in this embodiment can dehydrogenate the hydrogen storage organic liquid to form hydrogen gas and liquid hydrogen storage carrier.

[0027] In one embodiment, the organic liquid hydrogen supply unit 20 includes an integrated dehydrogenation reactor 201 and an oxygen source. The integrated dehydrogenation reactor 201 is connected to the raw material storage hydrogen supply unit 10 and the oxygen source. A discharge port is formed on the integrated dehydrogenation reactor 201.

[0028] It is understood that the integrated dehydrogenation reactor 201 is a structure that can be conceived by those skilled in the art for dehydrogenating hydrogen-storing organic liquids. By adding oxygen and hydrogen-storing organic liquids to the integrated dehydrogenation reactor 201 and controlling the temperature inside the integrated dehydrogenation reactor 201, the hydrogen-storing organic liquids can be transformed into hydrogen gas and liquid hydrogen storage carriers.

[0029] The dehydrogenation reaction of the hydrogen-storing organic liquid requires endothermic reaction. In order to make reasonable use of thermal energy, in one embodiment, the organic liquid hydrogen supply unit 20 further includes a heat exchanger 202 and a gas-liquid separator 203. The heat exchanger 202 has a first heat exchange chamber and a second heat exchange chamber. The raw material storage hydrogen supply unit 10 is connected to the integrated dehydrogenation reactor 201 via the first heat exchange chamber. The discharge port of the integrated dehydrogenation reactor 201 is connected to the second heat exchange chamber of the heat exchanger 202. The hydrogen-storing organic liquid in the first heat exchange chamber exchanges heat with the hydrogen and liquid hydrogen storage carrier in the second heat exchange chamber. The gas-liquid separator 203 is connected to the second heat exchange chamber and has a first discharge port and a second discharge port.

[0030] The generated hydrogen gas and liquid hydrogen storage carrier carry a certain amount of heat, which is exchanged with the hydrogen storage organic liquid flowing into the integrated dehydrogenation reactor 201 through heat exchanger 202. This increases the temperature of the hydrogen storage organic liquid before it enters the integrated dehydrogenation reactor 201, accelerating the reaction process. At the same time, the liquid hydrogen storage carrier with residual heat can be introduced into the externally immersed alloy hydrogen storage tank 302 to heat the externally immersed alloy hydrogen storage tank 302.

[0031] To facilitate the smooth supply of hydrogen generated in the organic liquid hydrogen supply unit 20 and the alloy hydrogen storage unit 30 to the fuel cell module, in one embodiment, the organic liquid hydrogen supply unit 20 further includes a hydrogen buffer tank 205. The first outlet of the gas-liquid separator 203 is connected to the inlet of the hydrogen buffer tank 205 or the external immersion alloy hydrogen storage tank 302, and the outlet of the external immersion alloy hydrogen storage tank 302 is connected to the hydrogen buffer tank 205.

[0032] To facilitate control of the hydrogen flow, in one embodiment, the organic liquid hydrogen supply unit 20 further includes a first solenoid valve 204, a second solenoid valve 206, and a third solenoid valve 207. The first outlet of the gas-liquid separator 203 is connected to the hydrogen buffer tank 205 via the first solenoid valve 204, the first outlet of the gas-liquid separator 203 is connected to the inlet of the externally immersed alloy hydrogen storage tank 302 via the second solenoid valve 206, and the outlet of the externally immersed alloy hydrogen storage tank 302 is connected to the hydrogen buffer tank 205 via the third solenoid valve 207.

[0033] When the hydrogen supply system is started, the first solenoid valve 204 and the second solenoid valve 206 are closed, and the third solenoid valve 207 is opened. The alloy hydrogen storage and supply unit supplies hydrogen to the outside through the hydrogen buffer tank 205. After the integrated dehydrogenation reactor 201 is heated to the predetermined reaction temperature, the metering pump 103 and the first solenoid valve 204 are opened. The organic liquid hydrogen storage and supply unit and the alloy hydrogen storage and supply unit supply hydrogen to the outside at the same time. When the hydrogen supply system is shut down, the metering pump 103, the first solenoid valve 204, the third solenoid valve 207 are closed, and the second solenoid valve 206 is opened. The residual hydrogen in the integrated dehydrogenation reactor 201 is transported to the externally immersed alloy hydrogen storage tank 302. At the same time, when the hydrogen supply system is replenished, hydrogen is supplied to the alloy hydrogen storage and supply unit through the organic liquid hydrogen supply unit 20.

[0034] In one embodiment, a fourth solenoid valve 208 is also included. The hydrogen buffer tank 205 has a hydrogen supply end and a return branch. The hydrogen supply end is connected to the fuel cell module. One end of the return branch is connected to the hydrogen supply end, and the other end of the return branch is connected to the integrated dehydrogenation reactor 201. The fourth solenoid valve 208 is installed on the return branch.

[0035] The hydrogen gas transported to the integrated dehydrogenation reactor 201 through the aforementioned reflux branch is mixed with oxygen and then subjected to a catalytic oxidation reaction to provide heat for the dehydrogenation reaction of the hydrogen-storage organic liquid.

[0036] In one embodiment, a hydrogen mass flow controller 209 is also included. The hydrogen mass flow controller 209 is installed on the reflux branch, and the reaction temperature in the integrated dehydrogenation reactor 201 is regulated by controlling the hydrogen flow rate entering the integrated dehydrogenation reactor 201.

[0037] The alloy hydrogen storage unit 30 in this embodiment includes an externally immersed alloy hydrogen storage tank 302. The externally immersed alloy hydrogen storage tank 302 has an outlet for discharging hydrogen and an inlet that can be connected to the first outlet of the organic liquid hydrogen supply unit 20. When the outlet of the externally immersed alloy hydrogen storage tank 302 is opened and the inlet is closed, the hydrogen storage metal inside releases hydrogen. When the outlet of the externally immersed alloy hydrogen storage tank 302 is closed and the inlet is opened, the hydrogen storage metal inside stores hydrogen.

[0038] It is understood that the aforementioned hydrogen storage metal is one or a mixture of two of the following: titanium-iron, titanium-manganese, and vanadium-iron hydrogen storage alloys.

[0039] To facilitate the carrying of the liquid hydrogen storage carrier (including water) discharged via the gas-liquid separator 203, in one embodiment, the alloy hydrogen storage unit 30 further includes a storage tank 301, with an externally immersed alloy hydrogen storage tank 302 housed within the storage tank 301. The storage tank 301 is connected to the second outlet of the organic liquid hydrogen supply unit 20. The liquid hydrogen storage carrier, carrying residual heat, surrounds the externally immersed alloy hydrogen storage tank 302, providing heat to the tank. After heat exchange, the liquid hydrogen storage carrier can be introduced into the first storage cavity located above the sliding partition 101 in the raw material storage tank 102 for storage. During the replenishment of the hydrogen storage organic liquid, as the sliding partition 101 moves upward, it facilitates the extrusion of the liquid hydrogen storage carrier outside the raw material storage tank 102.

[0040] It should be noted that the reaction of the hydrogen storage metal in the aforementioned externally immersed alloy hydrogen storage tank 302 is a reversible reaction, in which the hydrogen storage metal absorbs heat and releases hydrogen, and in turn, it releases heat to store hydrogen.

[0041] In the first embodiment, the raw material storage tank 102 has a circular radial cross section, the dehydrogenation reaction temperature of the hydrogen storage organic liquid is 250°C, the temperature of the mixture of high-temperature liquid hydrogen storage carrier and hydrogen is 200°C, the number of external immersion alloy hydrogen storage tanks 302 is one, and the hydrogen storage alloy material is a titanium-iron hydrogen storage alloy.

[0042] In the second embodiment, the radial cross-section of the raw material storage tank 102 is square, the dehydrogenation reaction temperature of the hydrogen storage organic liquid is 100°C, the temperature of the mixture of high-temperature liquid hydrogen storage carrier and hydrogen is 60°C, the number of external immersion alloy hydrogen storage tanks 302 is 10, and the hydrogen storage alloy material is vanadium-iron hydrogen storage alloy.

[0043] In the third embodiment, the radial cross-section of the raw material storage tank 102 is rectangular; the dehydrogenation reaction temperature of the hydrogen storage organic liquid is 180°C; the temperature of the mixture of high-temperature liquid hydrogen storage carrier and hydrogen is 120°C; there are 5 external immersion alloy hydrogen storage tanks 302; and the hydrogen storage alloy material is a mixture of titanium-iron hydrogen storage alloy and titanium-manganese hydrogen storage alloy.

[0044] In the fourth embodiment, the radial cross-section of the raw material storage tank 102 is square, the dehydrogenation reaction temperature of the hydrogen storage organic liquid is 140°C, the temperature of the mixture of high-temperature liquid hydrogen storage carrier and hydrogen is 100°C, the number of external immersion alloy hydrogen storage tanks 302 is 3, and the hydrogen storage alloy material is titanium-manganese hydrogen storage alloy.

[0045] In the fifth embodiment, the dehydrogenation reaction temperature of the hydrogen storage organic liquid is 220°C, the temperature of the mixture of high-temperature liquid hydrogen storage carrier and hydrogen is 180°C, the number of external immersion alloy hydrogen storage tanks 302 is 8, and the hydrogen storage alloy material is a mixture of titanium-iron hydrogen storage alloy and vanadium-iron hydrogen storage alloy.

[0046] In the sixth embodiment, the dehydrogenation reaction temperature of the hydrogen storage organic liquid is 100°C, the temperature of the mixture of high-temperature liquid hydrogen storage carrier and hydrogen is 60°C, the number of external immersion alloy hydrogen storage tanks 302 is 2, and the hydrogen storage alloy material is a mixture of titanium-manganese and vanadium-iron hydrogen storage alloys.

[0047] It is understandable that there are multiple externally immersed alloy hydrogen storage tanks 302, such as the first externally immersed alloy hydrogen storage tank 303, the second externally immersed alloy hydrogen storage tank 304, ... the Nth externally immersed alloy hydrogen storage tank 30N, the number of which depends on the amount of hydrogen required to be supplied by the fuel cell module.

[0048] Compared with existing technologies:

[0049] (1) When the fuel cell system is started, hydrogen can be quickly supplied to the fuel cell module and the integrated dehydrogenation reaction device through the alloy hydrogen storage unit 30. It has the characteristics of simple device structure, good safety in use and high hydrogen purity.

[0050] (2) The alloy hydrogen storage unit 30 can supply hydrogen to the fuel cell module alone, or it can be combined with the organic liquid hydrogen supply unit 20 to supply hydrogen to the outside. The organic liquid hydrogen supply unit 20 can charge the alloy hydrogen storage unit with hydrogen. During use, only the hydrogen storage organic liquid needs to be replenished, which has the feature of convenient hydrogen fuel supply guarantee.

[0051] (3) During the operation of the hydrogen supply system, the residual heat of the liquid hydrogen storage carrier is used to heat the externally immersed alloy hydrogen storage tank 302, which greatly improves the effective hydrogen release capacity of the alloy hydrogen storage tank and the system energy utilization efficiency. After the hydrogen supply system is shut down, the alloy hydrogen storage unit 30 can effectively absorb the residual hydrogen in the integrated dehydrogenation reactor 201, which solves the safety problem of residual hydrogen emission caused by the lag of the organic liquid dehydrogenation reaction. Moreover, there is no tail gas emission in the entire hydrogen supply process, which is very suitable for manned or unmanned vehicles such as conventional QT and underwater vehicles.

[0052] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A fuel cell hydrogen supply system for an aircraft, characterized in that, It includes a raw material storage and hydrogen supply unit, an organic liquid hydrogen supply unit, and an alloy hydrogen storage unit; The raw material storage and hydrogen supply unit contains hydrogen-storing organic liquid. The organic liquid hydrogen supply unit is connected to the raw material storage hydrogen supply unit and is used to receive the hydrogen storage organic liquid exported from the raw material storage hydrogen supply unit. The organic liquid hydrogen supply unit has a first outlet and a second outlet. The organic liquid hydrogen supply unit performs dehydrogenation treatment on the hydrogen storage organic liquid to form hydrogen gas exported from the first outlet and liquid hydrogen storage carrier exported from the second outlet, respectively. The alloy hydrogen storage unit includes an externally immersed alloy hydrogen storage tank, which has an outlet for discharging hydrogen and an inlet that can be connected to the first outlet of the organic liquid hydrogen supply unit. When the outlet of the externally immersed alloy hydrogen storage tank is open and the inlet is closed, the hydrogen storage metal inside releases hydrogen. When the outlet of the externally immersed alloy hydrogen storage tank is closed and the inlet is open, the hydrogen storage metal inside stores hydrogen.

2. The fuel cell hydrogen supply system for aircraft according to claim 1, characterized in that, The raw material storage and hydrogen supply unit includes a sliding partition, a raw material storage tank, and a metering pump. The sliding partition is built into the raw material storage tank and slides vertically and is sealed to the raw material storage tank. The sliding partition divides the interior of the raw material storage tank into a first storage chamber for storing liquid hydrogen storage carriers and a second storage chamber for storing hydrogen-containing organic liquids. The second storage chamber is connected to the organic liquid hydrogen supply unit via the metering pump.

3. The fuel cell hydrogen supply system for aircraft according to claim 1, characterized in that, The organic liquid hydrogen supply unit includes an integrated dehydrogenation reactor and an oxygen source. The integrated dehydrogenation reactor is connected to the raw material storage hydrogen supply unit and the oxygen source. A discharge port is formed on the integrated dehydrogenation reactor.

4. The fuel cell hydrogen supply system for aircraft according to claim 3, characterized in that, The organic liquid hydrogen supply unit further includes a heat exchanger and a gas-liquid separator. The heat exchanger has a first heat exchange chamber and a second heat exchange chamber. The raw material storage hydrogen supply unit is connected to the integrated dehydrogenation reactor via the first heat exchange chamber. The discharge port of the integrated dehydrogenation reactor is connected to the second heat exchange chamber of the heat exchanger. The hydrogen-storing organic liquid in the first heat exchange chamber exchanges heat with the hydrogen and liquid hydrogen storage carrier in the second heat exchange chamber. The gas-liquid separator is connected to the second heat exchange chamber. The gas-liquid separator has a first discharge port and a second discharge port.

5. The fuel cell hydrogen supply system for aircraft according to claim 4, characterized in that, The organic liquid hydrogen supply unit also includes a hydrogen buffer tank. The first outlet of the gas-liquid separator is connected to the inlet of the hydrogen buffer tank or the external immersion alloy hydrogen storage tank, and the outlet of the external immersion alloy hydrogen storage tank is connected to the hydrogen buffer tank.

6. The fuel cell hydrogen supply system for aircraft according to claim 5, characterized in that, The organic liquid hydrogen supply unit further includes a first solenoid valve, a second solenoid valve, and a third solenoid valve. The first outlet of the gas-liquid separator is connected to the hydrogen buffer tank via the first solenoid valve. The first outlet of the gas-liquid separator is connected to the inlet of the externally immersed alloy hydrogen storage tank via the second solenoid valve. The outlet of the externally immersed alloy hydrogen storage tank is connected to the hydrogen buffer tank via the third solenoid valve.

7. The fuel cell hydrogen supply system for aircraft according to claim 5, characterized in that, It also includes a fourth solenoid valve. The hydrogen buffer tank has a hydrogen supply end and a return branch. The hydrogen supply end is connected to the fuel cell module. One end of the return branch is connected to the hydrogen supply end, and the other end of the return branch is connected to the integrated dehydrogenation reactor. The fourth solenoid valve is installed on the return branch.

8. The fuel cell hydrogen supply system for aircraft according to claim 7, characterized in that, It also includes a hydrogen mass flow controller, which is installed on the return branch.

9. The fuel cell hydrogen supply system for aircraft according to claim 1, characterized in that, The alloy hydrogen storage unit also includes a liquid storage tank, and the externally immersed alloy hydrogen storage tank is built into the liquid storage tank. The liquid storage tank is connected to the second outlet of the organic liquid hydrogen supply unit.

10. The fuel cell hydrogen supply system for aircraft according to claim 9, characterized in that, The number of externally immersed alloy hydrogen storage tanks is multiple.

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