Movable solid hydrogen storage device

Abstract

The invention relates to a mobile solid hydrogen storage device. The mobile solid hydrogen storage device comprises a vehicle; the mobile solid hydrogen storage device further comprises a fuel cell power generation unit, an air-cooled heat pump unit and a solid hydrogen storage unit which are connected with one another; the fuel cell power generation unit, the air-cooled heat pump unit and the solid hydrogen storage unit are all arranged in the vehicle. In the mobile solid hydrogen storage device provided by the invention, the fuel cell power generation unit provides a power supply for the air cooled heat pump unit, the air cooled heat pump unit provides a cold source and a heat source required in a hydrogen absorption process and a hydrogen desorption process for the solid hydrogen storage unit, and the device provided by the invention can automatically complete the hydrogen absorption process and the hydrogen desorption process of the solid hydrogen storage unit; a cold source and an additional power supply do not need to be arranged at a hydrogen refueling station to complete hydrogen absorption reaction, a heat source and an additional power supply do not need to be arranged at a user side for hydrogen desorption reaction, and the method can be applied to emergency scenes and is not limited by external power grids and meteorological conditions.

Description

Technical Field

[0001] This invention relates to the field of hydrogen storage device technology, and more particularly to a mobile solid-state hydrogen storage device. Background Technology

[0002] Hydrogen energy, as a core carrier of the future energy system, faces critical bottlenecks in its storage and transportation safety and economy, hindering its large-scale industrialization. Currently, the mainstream hydrogen transportation technologies include high-pressure gaseous hydrogen transport, cryogenic liquid hydrogen transport, and organic liquid hydrogen transport, each with significant shortcomings. High-pressure gaseous hydrogen transport is mature, but requires compression to 35-70 MPa for transport in tubular vehicles, resulting in high costs over long distances and a risk of leakage. Cryogenic liquid hydrogen transport offers high hydrogen storage capacity and is suitable for long distances, but requires cooling to -253°C for transport in cryogenic tank trucks, leading to high refrigeration energy consumption, expensive equipment, and susceptibility to cold damage. While organic liquid hydrogen storage offers high hydrogen density, good safety, and can rely on existing pipeline networks, its dehydrogenation process requires high temperatures and energy consumption, and the catalyst is prone to deactivation, posing environmental risks. These technologies generally struggle to balance efficiency, cost, and safety, failing to meet the demands of large-scale, cross-regional hydrogen supply and also presenting safety and environmental hazards.

[0003] Solid-state hydrogen storage utilizes metal hydride chemical bonding for hydrogen storage, operating at pressures less than 1 MPa, with a volumetric hydrogen storage density reaching 900 kg / m³. 3 (23 times that of gaseous hydrogen storage at 35MPa), and hydrogen exists stably in solid form, so even if the tank is damaged, hydrogen is only released slowly, fundamentally solving the safety hazards of on-vehicle storage and transportation. Solid-state hydrogen storage has a low dehydrogenation reaction temperature and a fast reaction rate.

[0004] CN115585392A discloses a room-temperature solid-state hydrogen storage and supply system for small-scale distributed power generation, including a room-temperature solid-state hydrogen storage subsystem, a water circulation subsystem, and a hydrogen pipeline subsystem. The room-temperature solid-state hydrogen storage subsystem includes a room-temperature solid-state hydrogen storage device, a hydrogen valve, a hydrogen storage temperature sensor, and an electric heating device. The water circulation subsystem includes a water chiller, a solar water heater, a water circulation pump, and a circulating water temperature sensor. The hydrogen pipeline subsystem includes a mass flow controller, a first pressure reducing valve, a second pressure reducing valve, an emergency hydrogen release valve, a safety valve, and a pressure transmitter. The hydrogen storage temperature sensor is connected to the room-temperature solid-state hydrogen storage device. The electric heating device is installed in the room-temperature solid-state hydrogen storage device. The water circulation pump can be switched to operate through the water chiller. Alternatively, the solar water heater can provide circulating cold or hot water to the ambient temperature solid-state hydrogen storage device. The ambient temperature solid-state hydrogen storage device is connected to the hydrogen main pipe of the hydrogen pipeline subsystem via the hydrogen valve. The hydrogen main pipe is connected to the pressure transmitter and, via the emergency hydrogen release valve and safety valve, is connected in parallel to the hydrogen discharge port. The hydrogen pipeline subsystem can switch between allowing hydrogen from the hydrogen charging equipment to enter the hydrogen main pipe through the first pressure reducing valve and mass flow controller, and then charging the ambient temperature solid-state hydrogen storage device through the hydrogen valve (hydrogen absorption process), or allowing hydrogen stored in the ambient temperature solid-state hydrogen storage device to enter the hydrogen main pipe through the hydrogen valve, and then being sent to the hydrogen supply equipment via the mass flow controller and second pressure reducing valve (hydrogen release process). This solid-state hydrogen storage and supply system is only suitable for fixed scenarios of "small-scale distributed power generation" and cannot be moved.

[0005] Solid-state hydrogen storage devices rely on external cold and heat sources for hydrogen absorption and release. During hydrogen absorption, they require low-temperature cooling water (e.g., 7-12°C), while during hydrogen release, they require high-temperature hot water (e.g., above 65°C). In mobile scenarios, solid-state hydrogen storage devices face challenges in supplying cold and heat sources, as well as the power supply for the necessary equipment. This limits their application in emergency situations and in the absence of external power grid support.

[0006] In summary, researching and developing novel solid-state hydrogen storage and transportation devices to solve the challenges of hydrogen energy storage and transportation is of great strategic significance for building an integrated distributed hydrogen energy network encompassing production, storage, transportation, and utilization. Summary of the Invention

[0007] To address the aforementioned technical problems, this invention provides a mobile solid-state hydrogen storage device. This invention involves placing an interconnected fuel cell power generation unit, an air-cooled heat pump unit, and a solid-state hydrogen storage unit on a mobile vehicle. The fuel cell power generation unit provides power to the air-cooled heat pump unit, and the air-cooled heat pump unit provides the cold and heat sources required for the hydrogen absorption and release processes of the solid-state hydrogen storage unit. This allows the device to autonomously complete the hydrogen absorption and release processes of the solid-state hydrogen storage unit, eliminating the need for cold sources and additional power supplies at hydrogen refueling stations to complete the hydrogen absorption reaction, and also eliminating the need for heat sources and additional power supplies at the user end for the hydrogen release reaction. This device can be applied in emergency scenarios and is not limited by external power grids or weather conditions.

[0008] To achieve this objective, the present invention adopts the following technical solution:

[0009] In a first aspect, the present invention provides a mobile solid-state hydrogen storage device, the mobile solid-state hydrogen storage device comprising a vehicle;

[0010] The mobile solid-state hydrogen storage device also includes a fuel cell power generation unit, an air-cooled heat pump unit, and a solid-state hydrogen storage unit that are interconnected; the fuel cell power generation unit, the air-cooled heat pump unit, and the solid-state hydrogen storage unit are all located inside the vehicle;

[0011] The mobile solid-state hydrogen storage device also includes a hydrogen storage cylinder connected to the fuel cell power generation unit.

[0012] The mobile solid-state hydrogen storage device provided by this invention incorporates a hydrogen storage tank, a fuel cell power generation unit, an air-cooled heat pump unit, and a solid-state hydrogen storage unit within a vehicle. This device is mobile, enabling safe and low-cost long-distance hydrogen transportation, overcoming the limitations of traditional fixed-location scenarios. The device utilizes the fuel cell power generation unit to power the air-cooled heat pump unit, which in turn provides the cold and heat sources required for the hydrogen absorption and release processes of the solid-state hydrogen storage unit. This allows the mobile solid-state hydrogen storage device to autonomously complete the hydrogen absorption and release processes without the need for cold sources and additional power supplies at hydrogen refueling stations. It can be widely used in various types of hydrogen refueling stations. Furthermore, it eliminates the need for heat sources and additional power supplies at the user end for the hydrogen release reaction. This mobile solid-state hydrogen storage device can be applied in emergency scenarios, unaffected by external power grids or weather conditions. Moreover, this device uses only hydrogen as an energy input, requiring no external electricity input; the hydrogen absorption and release process is "zero-carbon." Compared to high-pressure gaseous hydrogen storage and low-temperature liquid hydrogen storage, this device employs a solid-state hydrogen storage unit, offering inherent safety.

[0013] It should be noted that the hydrogen storage cylinder in this invention is used to store the hydrogen required for the reaction of the fuel cell power generation unit.

[0014] As a preferred technical solution of the present invention, the solid hydrogen storage material of the solid hydrogen storage unit includes any one or a combination of at least two of titanium-based hydrogen storage alloy materials, rare earth-based hydrogen storage alloy materials, or vanadium-based hydrogen storage alloy materials. Typical but non-limiting combinations include: a combination of titanium-based hydrogen storage alloy materials and rare earth-based hydrogen storage alloy materials, a combination of titanium-based hydrogen storage alloy materials and vanadium-based hydrogen storage alloy materials, a combination of rare earth-based hydrogen storage alloy materials and vanadium-based hydrogen storage alloy materials, and a combination of titanium-based hydrogen storage alloy materials, rare earth-based hydrogen storage alloy materials, and vanadium-based hydrogen storage alloy materials.

[0015] The solid hydrogen storage unit in this invention is used for the storage and transportation of hydrogen.

[0016] Preferably, the air-cooled heat pump unit includes an air-cooled heat pump unit and an expansion tank.

[0017] Preferably, along the direction of hot and cold water transport, the air-cooled heat pump unit includes a hot and cold water circulating pump, a water-side heat exchanger, a four-way reversing valve, an air-side heat exchanger, a thermal expansion valve, and the water-side heat exchanger connected in sequence.

[0018] Preferably, the air-cooled heat pump unit further includes a refrigerant gas-liquid separator and a heat pump compressor that are connected to a four-way reversing valve.

[0019] In this invention, the air-cooled heat pump unit is used to cool and heat the solid hydrogen storage unit during the hydrogen absorption and release processes.

[0020] As a preferred technical solution of the present invention, the fuel cell power generation unit includes a fuel cell stack, a power management system, a control and safety management system, an air supply system, a hydrogen supply system, a thermal management system, a water management system, and a ventilation system.

[0021] In this invention, the fuel cell power generation unit is used to provide power to the internal equipment of the fuel cell power generation unit, the air-cooled heat pump unit, and the solid hydrogen storage power source.

[0022] As a preferred technical solution of the present invention, the power management system includes a distribution cabinet, a control cabinet, a voltage conversion module, a storage battery, and cables.

[0023] The fuel cell power generation unit in this invention differs from conventional fuel cell power generation units in that it incorporates a power management system. The power management system includes a battery that serves as the starting power source for the fuel cell power generation unit and charges the fuel cell during operation. The power management system also includes a voltage conversion module, comprising a DC / DC converter, a filter, a power storage converter (PCS), and electrical control and protection instruments.

[0024] Preferably, the power distribution cabinet is connected to both the voltage conversion module and the air-cooled heat pump unit.

[0025] Preferably, the control cabinet is connected to the hydrogen storage cylinder, the fuel cell power generation unit, the air-cooled heat pump unit, and the solid hydrogen storage unit via cables.

[0026] This invention incorporates a power management system within the fuel cell power generation unit to distribute, monitor, and control the power supply to the system comprised of the fuel cell power generation unit, the air-cooled heat pump unit, and the solid-state hydrogen storage unit. This enables the monitoring and control of all components within the device, ensuring its safe operation.

[0027] As a preferred technical solution of the present invention, the control and safety management system includes a pressure reducing valve, a purge valve, and a discharge control valve.

[0028] Preferably, the air supply system includes a first filter, an air compressor, and a humidifier.

[0029] As a preferred embodiment of the present invention, the hydrogen supply system includes a hydrogen injector and a hydrogen circulation pump.

[0030] Preferably, the thermal management system includes a heat dissipation tank, an air-cooled radiator, and a heat dissipation pump.

[0031] Preferably, the water management system includes a gas-water separator, a second filter, and a tailwater recovery pump.

[0032] As a preferred embodiment of the present invention, along the hydrogen transport direction, the fuel cell power generation unit includes a pressure reducing valve, a hydrogen injector, a fuel cell stack, and a purge valve connected in sequence.

[0033] Preferably, along the hydrogen transport direction, the fuel cell power generation unit further includes hydrogen circulation pumps connected to both sides of the fuel cell stack.

[0034] Preferably, along the air delivery direction, the fuel cell power generation unit includes a first filter, an air compressor, a humidifier, and a fuel cell stack connected in sequence.

[0035] Preferably, along the water transport direction, the fuel cell power generation unit includes a fuel cell stack, an emission control valve, a gas-water separator, a second filter, and a tailwater recovery pump connected in sequence.

[0036] Preferably, the tailwater recovery pump is connected to the humidifier, the radiator, and the expansion tank, respectively.

[0037] The fuel cell power generation unit in this invention differs from conventional fuel cell power generation units in that it incorporates a water management system. This system recycles the wastewater generated by the fuel cell reaction for use in the air supply system to humidify the air, replenishes the heat dissipation tank of the thermal management system, and replenishes the expansion tank of the air-cooled heat pump unit. Furthermore, the wastewater generated by the fuel cell power generation unit can also be used as replenishment water for the cold and heat source circulation system, thus solving the water shortage problem in emergency scenarios.

[0038] Preferably, the fuel cell stack, voltage conversion module, and battery are interconnected.

[0039] Preferably, the fuel cell power generation unit further includes a fuel cell waste heat utilization switching valve.

[0040] In this invention, the waste heat generated during the fuel cell power generation process can also be used for heat dissipation during the hydrogen release process of the solid hydrogen storage unit, thereby further reducing the power consumption of the air-cooled heat pump.

[0041] Preferably, the fuel cell stack is connected in sequence to a fuel cell waste heat utilization switching valve, an air-cooled radiator, and a cooling water tank.

[0042] Preferably, the cooling water pump is located between the fuel cell stack and the cooling water tank.

[0043] As a preferred technical solution of the present invention, the hydrogen absorption process of the mobile solid hydrogen storage device includes: using the fuel cell power generation unit to supply power to the air-cooled heat pump unit, so that the air-cooled heat pump unit provides cooling water to cool the solid hydrogen storage unit, and the air-cooled heat pump unit stops operating after the temperature drops to a first set temperature.

[0044] As a preferred technical solution of the present invention, the hydrogen release process of the mobile solid hydrogen storage device includes: using the fuel cell power generation unit to supply power to the air-cooled heat pump unit, so that the air-cooled heat pump unit provides hot water to heat the solid hydrogen storage unit, and the air-cooled heat pump unit stops operating after heating to a second set temperature.

[0045] As a preferred technical solution of the present invention, the first set temperature during the hydrogen absorption process is 7~12℃, for example, it can be 7℃, 8℃, 9℃, 10℃, 11℃ or 12℃, but it is not limited to the listed values. Other unlisted values ​​within the above range are also applicable.

[0046] Preferably, the second set temperature during the hydrogen release process is 60~65℃, for example, it can be 60℃, 61℃, 62℃, 63℃, 64℃ or 65℃, but it is not limited to the listed values. Other unlisted values ​​within the above range are also applicable.

[0047] It should be noted that during the hydrogen absorption process, after hydrogen release, the solid-state hydrogen storage unit is at 60-65°C. To avoid affecting the absorption rate and shorten the absorption time, the solid-state hydrogen storage unit needs to be cooled. Therefore, during the return journey of the mobile solid-state hydrogen storage device to the hydrogen refueling station, the fuel cell power generation unit supplies power to the air-cooled heat pump unit, which is in cooling mode. The air-cooled heat pump unit provides 7°C chilled water to cool the solid-state hydrogen storage unit. Once the temperature reaches the set point, the air-cooled heat pump unit stops operating. Upon arrival at the hydrogen refueling station, the station can refill the hydrogen storage tank with hydrogen to ensure the normal operation of the fuel cell power generation unit. The air-cooled heat pump unit maintains cooling mode, removing the heat of reaction from the solid-state hydrogen storage unit and maintaining stable operation of the hydrogen absorption process.

[0048] During the hydrogen release process, after hydrogen absorption, the solid-state hydrogen storage unit is at 7-12°C. To avoid affecting the release rate and shorten the release time, the solid-state hydrogen storage unit needs to be heated. While the mobile solid-state hydrogen storage device is being transported to the user, the fuel cell power generation unit supplies power to the air-cooled heat pump unit, which is in heating mode. The air-cooled heat pump unit provides 65°C hot water to heat the solid-state hydrogen storage unit until the set temperature is reached, at which point it stops operating. Upon arrival at the user, the fuel cell power generation unit continues to supply power to the air-cooled heat pump unit, which maintains its heating mode to provide the heat of the hydrogen release reaction for the solid-state hydrogen storage unit, ensuring stable operation of the release process. During this process, the waste heat generated by the fuel cell power generation unit is also recycled to the solid-state hydrogen storage unit, further reducing the power consumption of the air-cooled heat pump unit.

[0049] Compared with the prior art, the present invention has at least the following beneficial effects:

[0050] (1) The mobile solid hydrogen storage device provided by the present invention does not rely on external power grids or heat sources (such as industrial steam), and can directly provide hydrogen energy (such as powering fuel cell equipment) in mining areas, field construction sites, and disaster sites.

[0051] (2) The mobile solid hydrogen storage device provided by the present invention can pre-cool and preheat the solid hydrogen storage unit during transportation, shorten the reaction time of the solid hydrogen storage device in hydrogen refueling station and user end for hydrogen absorption and release, and enable hydrogen absorption and release to respond quickly to demand.

[0052] (3) The mobile solid hydrogen storage device provided by the present invention does not require a matching cold or heat source at the hydrogen refueling end and the user end, reducing infrastructure investment at both ends and expanding the application scenarios of hydrogen. Attached Figure Description

[0053] Figure 1 This is a front view of the mobile solid-state hydrogen storage device provided in Example 1.

[0054] Figure 2 This is a top view of the mobile solid-state hydrogen storage device provided in Example 1.

[0055] Figure 3 This is a process flow diagram of the mobile solid-state hydrogen storage device provided in Example 1.

[0056] Among them, 1-hydrogen storage cylinder; 2-pressure reducing valve; 3-hydrogen injector; 4-hydrogen circulation pump; 5-purge valve; 6-voltage conversion module; 7-cooling water tank; 8-air-cooled radiator; 9-cooling water pump; 10-fuel cell stack; 11-first filter; 12-air compressor; 13-humidifier; 14-emission control valve; 15-gas-water separator; 16-second filter; 17-tailwater recovery pump; 18-battery; 19-distribution cabinet; 20-Control cabinet; 21-Expansion tank; 22-Hot and cold water circulation pump; 23-Water-side heat exchanger; 24-Thermal expansion valve; 25-Air-side heat exchanger; 26-Refrigerant gas-liquid separator; 27-Heat pump compressor; 28-Four-way reversing valve; 29-Titanium solid hydrogen storage unit; 30-Fuel cell power generation unit; 31-Air-cooled heat pump unit; 32-Air-cooled heat pump unit; 33-Fuel cell waste heat utilization switching valve; 34-Support; 35-Vehicle. Detailed Implementation

[0057] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments. However, the following examples are merely simplified examples of the present invention and do not represent or limit the scope of protection of the present invention. The scope of protection of the present invention is determined by the claims.

[0058] Example 1

[0059] This embodiment provides a mobile solid-state hydrogen storage device, such as... Figure 1 and Figure 2 As shown, the mobile solid hydrogen storage device includes a vehicle 35; the mobile solid hydrogen storage device also includes a fuel cell power generation unit 30, an air-cooled heat pump unit 31 and a titanium solid hydrogen storage unit 29, which are disposed inside the vehicle 35 and interconnected with each other; the mobile solid hydrogen storage device also includes a hydrogen storage cylinder 1 connected to the fuel cell power generation unit 30.

[0060] The air-cooled heat pump unit 31 includes an air-cooled heat pump unit 32 and an expansion tank 21 mounted on a bracket 34. Along the direction of hot and cold water delivery, the air-cooled heat pump unit 32 includes a hot and cold water circulation pump 22, a water-side heat exchanger 23, a four-way reversing valve 28, an air-side heat exchanger 25, a thermal expansion valve 24, and the water-side heat exchanger 23 connected in sequence. The air-cooled heat pump unit 32 also includes a refrigerant gas-liquid separator 26 and a heat pump compressor 27 that are connected to the four-way reversing valve 28.

[0061] The fuel cell power generation unit 30 includes a fuel cell stack 10, a power management system, a control and safety management system, an air supply system, a hydrogen supply system, a thermal management system, a water management system, and a ventilation system. The power management system includes a distribution cabinet 19, a control cabinet 20, a voltage conversion module 6, a battery 18, and cables. The distribution cabinet 19 is connected to the voltage conversion module 6 and the air-cooled heat pump unit 31. The control cabinet 20 is connected via cables to the hydrogen storage tank 1, the fuel cell power generation unit 30, the air-cooled heat pump unit 31, and the titanium solid-state hydrogen storage unit 29. The control and safety management system includes a pressure reducing valve 2, a purge valve 5, and an emission control valve 14. The air supply system includes a first filter 11, an air compressor 12, and a humidifier 13. The hydrogen supply system includes a hydrogen injector 3 and a hydrogen circulation pump 4. The thermal management system includes a cooling water tank 7, an air-cooled radiator 8, and a cooling water pump 9. The water management system includes a gas-water separator 15, a second filter 16, and a tailwater recovery pump 17. Specifically, along the hydrogen transport direction, the fuel cell... The power generation unit 30 includes a pressure reducing valve 2, a hydrogen injector 3, a fuel cell stack 10, and a purge valve 5 connected in sequence. The fuel cell power generation unit 30 also includes a hydrogen circulation pump 4 connected to both sides of the fuel cell stack 10. Along the air transport direction, the fuel cell power generation unit 30 includes a first filter 11, an air compressor 12, a humidifier 13, and the fuel cell stack 10 connected in sequence. Along the water transport direction, the fuel cell power generation unit 30 includes the fuel cell stack 10, an emission control valve 14, a gas-water separator 15, a second filter 16, and a tailwater recovery pump 17 connected in sequence. The tailwater recovery pump 17 is connected to the humidifier 13, a cooling water tank 7, and an expansion tank 21. The fuel cell stack 10, voltage conversion module 6, and battery 18 are interconnected. The fuel cell power generation unit 30 also includes a fuel cell waste heat utilization switching valve 35. The fuel cell stack 10 is connected in sequence to the fuel cell waste heat utilization switching valve 35, an air-cooled radiator 8, and a cooling water tank 7. A cooling water pump 9 is located between the fuel cell stack 10 and the cooling water tank 7.

[0062] The process flow of a mobile solid-state hydrogen storage device is as follows: Figure 3 As shown, the hydrogen absorption process of the mobile solid hydrogen storage device includes: using the fuel cell power generation unit to supply power to the air-cooled heat pump unit, so that the air-cooled heat pump unit provides cooling water to cool the solid hydrogen storage unit, and the air-cooled heat pump unit stops operating after the temperature drops to 7°C.

[0063] The hydrogen release process of the mobile solid hydrogen storage device includes: using the fuel cell power generation unit to supply power to the air-cooled heat pump unit, so that the air-cooled heat pump unit provides hot water to heat the solid hydrogen storage unit, and the air-cooled heat pump unit stops operating after heating to 65°C.

[0064] For 500Nm 3 The configuration of a mobile solid-state hydrogen storage device (storing 45 kg of hydrogen) is described in detail. In this device, when the hydrogen absorption and desorption pressure is 1 MPa, the hydrogen absorption and desorption rate is 200 Nm. 3 The hydrogen absorption reaction takes 2.5 hours and the hydrogen release reaction takes 2.5 hours to complete. The heat of reaction for hydrogen absorption and release is 15 MJ / kg. The required air-cooled heat pump unit has a heating and cooling capacity of 75 kW, a cooling power of 25 kW, and a heating power of 30 kW. The cooling process is designed with a water supply temperature of 7℃ and a return temperature of 12℃, while the heating process is designed with a water supply temperature of 65℃ and a return temperature of 60℃. The flow rate of the hot and cold water circulation pump is 13 m³ / h. 3 / h. Considering the power consumption of auxiliary systems such as water pumps, the required power generation unit for the fuel cell power generation unit is 35kW. The fuel cell operates for 4.5 hours, meaning the amount of hydrogen required for one hydrogen release (or absorption) process and heating (or cooling) during transport is 10kg. Therefore, a 20MPa hydrogen storage tank with a volume of 1m³ is required. 3 The total weight of all components is approximately 12 tons, and a vehicle with a length of 13 meters was selected.

[0065] In summary, this invention, by installing an interconnected fuel cell power generation unit, an air-cooled heat pump unit, and a solid-state hydrogen storage unit on a mobile vehicle, uses the fuel cell power generation unit to provide power to the air-cooled heat pump unit, and uses the air-cooled heat pump unit to provide the cold and heat sources required for the hydrogen absorption and release processes of the solid-state hydrogen storage unit. This allows the device provided by this invention to independently complete the hydrogen absorption and release processes of the solid-state hydrogen storage unit without relying on an external power grid or heat source, and can directly provide hydrogen energy in mining areas, field construction sites, and disaster sites. At the same time, the solid-state hydrogen storage unit can be pre-cooled and preheated during transportation, shortening the reaction time of the solid-state hydrogen storage device for hydrogen absorption and release at hydrogen refueling stations and user terminals, enabling rapid response to hydrogen absorption and release needs. The hydrogen refueling and user terminals do not require supporting cold and heat sources, reducing infrastructure investment at both ends and expanding the application scenarios of hydrogen.

[0066] The applicant declares that the above description is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention fall within the protection and disclosure scope of the present invention.

Claims

1. A mobile solid-state hydrogen storage device, characterized in that, The mobile solid-state hydrogen storage device includes a vehicle; The mobile solid-state hydrogen storage device also includes a fuel cell power generation unit, an air-cooled heat pump unit, and a solid-state hydrogen storage unit that are interconnected; the fuel cell power generation unit, the air-cooled heat pump unit, and the solid-state hydrogen storage unit are all located inside the vehicle; The mobile solid-state hydrogen storage device also includes a hydrogen storage cylinder connected to the fuel cell power generation unit.

2. The mobile solid-state hydrogen storage device according to claim 1, characterized in that, The solid hydrogen storage material of the solid hydrogen storage unit includes any one or a combination of at least two of the following: titanium-based hydrogen storage alloy materials, rare earth-based hydrogen storage alloy materials, or vanadium-based hydrogen storage alloy materials.

3. The mobile solid-state hydrogen storage device according to claim 1 or 2, characterized in that, The fuel cell power generation unit includes a fuel cell stack, a power management system, a control and safety management system, an air supply system, a hydrogen supply system, a thermal management system, a water management system, and a ventilation system.

4. The mobile solid-state hydrogen storage device according to claim 3, characterized in that, The power management system includes distribution cabinets, control cabinets, voltage conversion modules, batteries, and cables; Preferably, the power distribution cabinet is connected to both the voltage conversion module and the air-cooled heat pump unit; Preferably, the control cabinet is connected to the hydrogen storage cylinder, the fuel cell power generation unit, the air-cooled heat pump unit, and the solid hydrogen storage unit via cables.

5. The mobile solid-state hydrogen storage device according to claim 4, characterized in that, The control and safety management system includes a pressure reducing valve, a purge valve, and a discharge control valve; Preferably, the air supply system includes a first filter, an air compressor, and a humidifier.

6. The mobile solid-state hydrogen storage device according to claim 5, characterized in that, The hydrogen supply system includes a hydrogen injector and a hydrogen circulation pump; Preferably, the thermal management system includes a heat dissipation tank, an air-cooled radiator, and a heat dissipation pump; Preferably, the water management system includes a gas-water separator, a second filter, and a tailwater recovery pump.

7. The mobile solid-state hydrogen storage device according to claim 6, characterized in that, Along the hydrogen transport direction, the fuel cell power generation unit includes a pressure reducing valve, a hydrogen injector, a fuel cell stack, and a purge valve connected in sequence. Preferably, along the hydrogen transport direction, the fuel cell power generation unit further includes hydrogen circulation pumps connected to both sides of the fuel cell stack; Preferably, along the air delivery direction, the fuel cell power generation unit includes a first filter, an air compressor, a humidifier, and a fuel cell stack connected in sequence; Preferably, along the water transport direction, the fuel cell power generation unit includes a fuel cell stack, an emission control valve, a gas-water separator, a second filter, and a tailwater recovery pump connected in sequence. Preferably, the tailwater recovery pump is connected to the humidifier, the radiator, and the expansion tank, respectively; Preferably, the fuel cell stack, voltage conversion module, and battery are interconnected; Preferably, the fuel cell power generation unit further includes a fuel cell waste heat utilization switching valve; Preferably, the fuel cell stack is connected in sequence to a fuel cell waste heat utilization switching valve, an air-cooled radiator, and a cooling water tank; Preferably, the cooling water pump is located between the fuel cell stack and the cooling water tank.

8. The mobile solid-state hydrogen storage device according to any one of claims 1-7, characterized in that, The hydrogen absorption process of the mobile solid-state hydrogen storage device includes: using the fuel cell power generation unit to supply power to the air-cooled heat pump unit, so that the air-cooled heat pump unit provides cooling water to cool the solid-state hydrogen storage unit, and the air-cooled heat pump unit stops operating after the temperature drops to a first set temperature.

9. The mobile solid-state hydrogen storage device according to claim 8, characterized in that, The hydrogen release process of the mobile solid hydrogen storage device includes: using the fuel cell power generation unit to supply power to the air-cooled heat pump unit, so that the air-cooled heat pump unit provides hot water to heat the solid hydrogen storage unit, and the air-cooled heat pump unit stops operating after heating to the second set temperature.

10. The mobile solid-state hydrogen storage device according to claim 9, characterized in that, The first set temperature during the hydrogen absorption process is 7~12℃; Preferably, the second set temperature during the hydrogen release process is 60~65℃.

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