A solid hydrogen storage bottle, filling device and filling method

Abstract

The application discloses a solid-state hydrogen storage bottle, a filling device and a filling method. The hydrogen storage bottle comprises a bottle shell and an elastic element arranged in the bottle shell. One end of the elastic element is provided with an opening and a cavity. A hydrogen storage material filling layer is arranged in the cavity of the elastic element. The elastic element and the bottle shell are provided with radial and axial expansion gaps. A plurality of cold conducting components penetrating through the hydrogen storage material filling layer are arranged in the cavity of the elastic element. The cold conducting components are connected with a bottle cap. The elastic element is located between the bottle shell and the bottle cap. A monitoring component is connected to the bottle cap. The monitoring component comprises a strain transmitter arranged on the outer wall of the elastic element and a plurality of temperature sensors arranged on the bottle shell. The probes of the temperature sensors are arranged in the material filling layer. The strain transmitter is used for monitoring the deformation amount of the elastic element. The application has the advantages of simple structure, convenient realization of hydrogen filling and cooling and hydrogen release and heating of the solid-state hydrogen storage bottle, high safety and simplified manufacturing process.

Description

Technical Field

[0001] This invention belongs to the field of hydrogen storage technology, and particularly relates to a solid hydrogen storage bottle, filling equipment and filling method. Background Technology

[0002] Solid-state hydrogen storage technology is considered a key development direction in the field of hydrogen energy storage and transportation due to its high volumetric hydrogen storage density, low operating pressure, and inherent safety. Solid-state hydrogen storage materials release heat when absorbing hydrogen and absorb heat when releasing hydrogen. The internal temperature of the hydrogen storage device has a decisive influence on the rate and efficiency of hydrogen absorption and release reactions. However, existing solid-state hydrogen storage devices and their filling equipment still have the following technical shortcomings: (1) Existing solid hydrogen storage cylinders usually only have a single hydrogen storage function. During the hydrogen filling process, the hydrogen storage alloy material will release a lot of heat. If the heat is not dissipated in time, the high temperature will significantly reduce the hydrogen filling rate and hydrogen storage capacity. Conversely, the hydrogen release process requires external heating. Existing technologies usually require additional independent heating equipment, which makes the system complex and has low thermal efficiency.

[0003] (2) Hydrogen storage alloys will expand in volume (up to 15%-25%) during hydrogen absorption. If no reasonable expansion space is reserved, the tank will be subjected to excessive stress or even deformed and damaged. Existing stress buffer structure designs are too complicated, such as sandwich layered structures that require multiple layers of composite materials and complicated manufacturing processes. (3) Hydrogen storage alloy powder is prone to pulverization and sedimentation during long-term hydrogen absorption and desorption cycles, resulting in material accumulation in some areas of the tank and cavities in other areas, which affects the uniformity of heat and mass transfer and reduces hydrogen storage performance. (4) The existing hydrogen storage devices generally use standard pipe thread interfaces for charging and discharging. Disassembly and assembly require tools, which is inconvenient. Furthermore, when replacing solid hydrogen storage cylinders, multiple pipelines (gas pipes, coolant pipes, etc.) need to be reconnected, which is time-consuming and prone to errors. Meanwhile, for existing filling equipment, the connection between it and the solid hydrogen storage cylinder is mostly a one-time connection, lacking a standardized quick connection structure. This results in low efficiency in scenarios where solid hydrogen storage cylinders are frequently replaced. Furthermore, although existing hydrogen filling systems can achieve precise control of temperature, pressure, and flow, they are usually separate from the solid hydrogen storage cylinder body and cannot adaptively adjust according to the real-time status of the hydrogen storage material inside the tank. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art by providing a solid hydrogen storage bottle, filling equipment and filling method, which has a simple structure, facilitates hydrogen filling and cooling and hydrogen release heating of the solid hydrogen storage bottle, has high safety and simplifies the manufacturing process.

[0005] The objective of this invention is achieved through the following technical solution: A solid hydrogen storage cylinder includes a cylinder shell and an elastic element disposed within the cylinder shell. One end of the elastic element has an opening and forms a cavity. A hydrogen storage material filling layer is disposed within the cavity of the elastic element. Radial and axial expansion gaps exist between the elastic element and the cylinder shell. Multiple cooling conductive components penetrating the hydrogen storage material filling layer are also disposed within the cavity of the elastic element. The cooling conductive components are connected to a cap. The elastic element is located between the cylinder shell and the cap. A monitoring component is connected to the cap. The monitoring component includes a strain transmitter disposed on the outer wall of the elastic element and multiple temperature sensors disposed on the cylinder shell. The multiple temperature sensors are spaced apart along the height direction of the cylinder shell. The probes of the temperature sensors penetrate within the material filling layer. The strain transmitter is used to monitor the deformation of the elastic element.

[0006] In one embodiment, the elastic element is a wave-shaped metal spring tube.

[0007] In one embodiment, each of the cooling components includes two heat exchange tubes, the heat exchange tubes are U-shaped, and each heat exchange tube has radially extending heat-conducting fins distributed on its outer wall. The two heat exchange tubes are connected to each other to form a parallel heat exchange structure, and the inner cavity of the parallel heat exchange structure is filled with a heat exchange medium.

[0008] In one embodiment, the bottle cap is further provided with a hydrogen channel interface, a coolant inlet interface, a coolant outlet interface, and a quick-change interface assembly for connection with a filling device. The coolant inlet interface and the coolant outlet interface are connected to the parallel heat exchange structure.

[0009] The present invention also provides a filling device, including the aforementioned solid hydrogen storage cylinder, and a main control box. The top of the main control box is equipped with multiple functional modules, and the bottom of the main control box has a pipeline cavity. The pipeline cavity is provided with hydrogen filling process pipelines and liquid cooling circulation pipelines. A filling seat extending horizontally is also provided on one side of the main control box. The filling seat matches the outer shell of the cylinder. An integrated filling interface assembly for connecting to the solid hydrogen storage cylinder is also provided on the side wall of the main control box near the filling seat.

[0010] In one embodiment, the integrated filling interface assembly includes an arc-shaped guide rail disposed on the main control box, a slider mounted on the arc-shaped guide rail, a fixing plate disposed on the slider, a filling connector fixing plate disposed on the fixing plate, a first cold liquid circulation hose, a hydrogenation hose and a second cold liquid circulation hose passing through the filling connector fixing plate, and quick connectors for connecting to the bottle cap being provided at the ends of the first cold liquid circulation hose, the hydrogenation hose and the second cold liquid circulation hose.

[0011] In one embodiment, the filling interface assembly is coaxially arranged with the filling base, and the filling base is also provided with a limit switch.

[0012] The present invention also provides a filling method for the above-mentioned solid hydrogen storage cylinder, comprising: The temperature information of the hydrogen storage material at different heights during the filling process is obtained. When the temperature at any height exceeds the preset temperature threshold, the coolant circulation flow rate is increased. The deformation of the elastic component during the filling process is obtained. When the deformation of the elastic component exceeds the preset deformation threshold, the filling operation is stopped.

[0013] In one implementation, it further includes: Before starting to fill with hydrogen, first check whether the solid hydrogen storage cylinder is in the correct position and whether the interfaces on the solid hydrogen storage cylinder are properly connected. Start the cooling liquid circulation to pre-cool the hydrogen storage material until its temperature drops to the preset start-up temperature before proceeding with the filling operation.

[0014] In one implementation, it further includes: Obtain the filling pressure inside the solid hydrogen storage cylinder. When the filling pressure reaches the preset pressure threshold, close the hydrogen filling solenoid valve, stop the coolant circulation, and remove the solid hydrogen storage cylinder.

[0015] The beneficial effects of this invention are as follows: The elastic element formed by the wave-shaped metal spring tube is used as the cavity to accommodate the hydrogen storage material filling layer. The gap between the elastic element and the outer shell of the bottle is reserved so that the deformation of the elastic element can be monitored by the strain transmitter set on the elastic element during the hydrogen filling and releasing process, thereby quickly judging the filling status. In addition, the stress buffer structure of the entire solid hydrogen storage bottle is simple, the expansion is small, and no additional independent heating equipment is required. Attached Figure Description

[0016] The invention will now be described in more detail with reference to embodiments and the accompanying drawings. Figure 1 A schematic diagram of the filling device of the present invention is shown; Figure 2 This shows a schematic diagram (exploded view) of the solid hydrogen storage bottle of the present invention. Figure 3 A schematic diagram (cross-sectional view) of the solid hydrogen storage bottle of the present invention is shown. Figure 4 A schematic diagram of the main control box of the present invention is shown; Figure 5 A schematic diagram of the main control box of the present invention is shown; Figure 6A schematic diagram of the filling method of the present invention is shown; In the accompanying drawings, the same parts use the same reference numerals. The drawings are not to scale.

[0017] Figure label: 1: Body; 2: Solid hydrogen storage tank; 3: Ventilation panel; 1-1: Main control box; 1-2: Display screen; 1-3: Receipt printer; 1-4: Emergency stop button; 1-5: Keyboard; 1-6: Hydrogen inlet; 1-7: Pressure reducing valve; 1-8: Mass flow meter; 1-9: Pressure transmitter; 1-10: Cold liquid tank; 1-11: Solenoid valve; 1-12: Refrigeration compressor; 1-13: Circulation pump; 1-14: Pressure gauge; 1-15: Slider (arc); 1-16: First cold liquid circulation soft... Pipes, 1-17: Hydrogen charging hose, 1-18: Second cold liquid circulation hose, 1-19: Hydrogen storage cylinder cable, 1-20: Filling connector fixing plate, 1-21: Fixing plate, 1-22: Hydrogen charging quick connector (female), 1-23: First cold liquid circulation quick connector (female), 1-24: Wiring harness plug (female), 1-25: Second cold liquid circulation quick connector (female), 1-26: Filling seat, 1-27: Arc guide rail; 2-1: Bottle outer shell; 2-2: Temperature sensor; 2-3: Waveform metal spring tube; 2-4: Strain sensor; 2-5: Cooling tube; 2-6: Bottle cap; 2-7: Cold liquid end plate; 2-8: Wiring harness plug (male); 2-9: Filling valve; 2-10: Cold liquid circulation quick connector (male); 2-11: Fixing bolt. Detailed Implementation

[0018] The invention will now be further described with reference to the accompanying drawings.

[0019] This invention provides a solid hydrogen storage bottle, such as... Figure 2 and Figure 3 As shown, the solid hydrogen storage cylinder 2 includes a cylinder shell 2-1 and an elastic element disposed inside the cylinder shell 2-1. One end of the elastic element has an opening and forms a cavity. A hydrogen storage material filling layer is disposed inside the cavity of the elastic element. There are radial and axial expansion gaps between the elastic element and the cylinder shell 2-1. Multiple cooling conductive components penetrating the hydrogen storage material filling layer are also disposed inside the cavity of the elastic element. The cooling conductive components are connected to the cylinder cap 2-6. The elastic element is located between the cylinder shell 2-1 and the cylinder cap 2-6. A monitoring component is connected to the cylinder cap. The monitoring component includes a strain transmitter 2-4 disposed on the outer wall of the elastic element and multiple temperature sensors 2-2 disposed on the cylinder shell 2-1. The multiple temperature sensors 2-2 are spaced apart along the height direction of the cylinder shell. The probes of the temperature sensors 2-2 penetrate inside the material filling layer. The strain transmitter 2-4 is used to monitor the deformation of the elastic element. Specifically, the elastic element is a wave-shaped metal spring tube 2-3, and each cooling component includes two heat exchange tubes 2-5. The heat exchange tubes 2-5 have a U-shaped structure, and each heat exchange tube 2-5 has radially extending heat-conducting fins distributed on its outer wall. The two heat exchange tubes 2-5 are connected to each other to form a parallel heat exchange structure. The inner cavity of the parallel heat exchange structure is filled with heat exchange medium. The bottle cap 2-6 is also provided with a hydrogen channel interface, a coolant inlet interface, a coolant outlet interface, and a quick-change interface assembly for connection with the filling equipment. The coolant inlet interface and the coolant outlet interface are connected to the parallel heat exchange structure. The bottle cap 2-6 and the bottle shell 2-1 are connected as one unit by fixing bolts 2-11. It should be noted that in this embodiment, the outer shell of the bottle is made of aluminum alloy, and the inner cavity of the parallel heat exchange structure is filled with a heat exchange medium (coolant during hydrogen filling and heating liquid during hydrogen release). The quick-change interface assembly includes a wire harness plug (male) 2-8, a coolant circulation quick connector (male) 2-10, and a filling valve 2-9 with a filling connector (male). Multiple axially distributed interfaces are provided on the end of the bottle cap, including a central hydrogen channel interface, a coolant inlet interface, and a coolant outlet interface. A sealing ring and a... are embedded on the mating surface of the interface panel. The self-sealing valve, including the quick-connect fitting (male) 2-10 for cold liquid circulation and the filling valve 2-9, is self-sealing, meaning it will not leak after being disconnected from the female fitting. Two temperature transmitters acquire the temperature distribution of the hydrogen storage material filling layer in real time, and the strain sensor directly monitors the deformation of the elastic expansion layer. All sensors are connected to the cable harness plug 2-8 via a cable channel set in the bottle shell. The deformation can be used to monitor in real time whether the bellows is in a safe operating state. The structure is simple, which facilitates the filling and cooling of hydrogen and the heating of hydrogen release in solid hydrogen storage bottles. It has high safety and simplifies the manufacturing process.

[0020] The present invention also provides a filling device, such as Figure 1 , Figure 4 as well as Figure 5 As shown, the main body 1 includes a main control box 1-1. Multiple functional modules are installed on the top of the main control box 1-1. A pipeline cavity is opened at the bottom of the main control box 1-1. Hydrogen filling process pipeline and liquid cooling circulation pipeline are installed in the pipeline cavity. A filling seat 1-26 extending horizontally is also provided on one side of the main control box 1-1. The filling seat 1-26 matches the outer shell 2-1 of the bottle. An integrated filling interface assembly that connects to the solid hydrogen storage bottle 2 is also provided on the side wall of the main control box 1-1 near the filling seat 1-26. Specifically, the functional modules include displays 1-3, which have a motherboard for displaying real-time hydrogen filling status parameters and filling progress, and receiving user operation commands; the motherboard reads and controls the circulating pump, solenoid valve, mass flow meter, pressure transmitter, refrigeration compressor, and temperature and strain sensors of the hydrogen storage cylinder unit in the coolant circulation system; the motherboard receives wired temperature and strain data from the hydrogen storage cylinder unit, and automatically adjusts the flow and temperature of the coolant, as well as the filling pressure and flow rate of hydrogen, according to the preset control strategy; it also includes a receipt printer 1-3 (mainly for printing filling settlement slips), an emergency stop button 1-4 (for emergency shutdown), and a keyboard 1-5 (integrated card reader) for reading user cards and parameter input ports of the human-machine interface; Furthermore, such as Figure 4 As shown, the hydrogen filling process pipeline includes a hydrogen inlet 1-6, a pressure reducing valve 1-7, a mass flow meter 1-8, a pressure transmitter 1-9, a solenoid valve 1-11, and a pressure gauge 1-14; the hydrogen inlet 1-6 is connected to a hydrogen cylinder or a hydrogen collector (pressure 25MPa); the pressure reducing valve 1-7 is used to reduce the pressure of the gas source from 25MPa to 4MPa; the mass flow meter 1-8 is used for hydrogen filling metering; the pressure transmitter 1-9 is used to obtain the real-time hydrogen filling pressure; the solenoid valve 1-11 is the hydrogen filling control valve; and the pressure gauge 1-14 is used to read the hydrogen storage cylinder pressure or the hydrogen filling pressure. like Figure 4 As shown, the coolant circulation pipeline includes a coolant tank 1-10, a refrigeration compressor 1-12, and a circulation pump 1-13. The coolant tank 1-10 is used to store coolant and replenish coolant. The refrigeration compressor 1-12 cools the coolant. The circulation pump 1-13 is used to circulate the coolant in the pipeline. Furthermore, such as Figure 5As shown, the integrated filling interface assembly includes a slider 1-15 (arc structure), a first cold liquid circulation hose 1-16, a hydrogen refueling hose 1-17, a second cold liquid circulation hose 1-18, a hydrogen storage cylinder temperature-sensitive cable 1-19, a filling connector fixing plate 1-20, a fixing plate 1-21, a hydrogen filling quick connector (female) 1-22, a first cold liquid circulation quick connector (female) 1-23, a wire harness plug (female) 1-24, a second cold liquid circulation quick connector (female) 1-25, a filling base 1-26, and an arc guide rail 1-27; a preset limit switch on the filling base 1-26 is used to detect whether the hydrogen storage cylinder is correctly placed inside the cylindrical tube of the filling base; the integrated filling interface assembly connects the first cold liquid circulation hose 1-16 to the filling base. 6. Hydrogen charging hose 1-17, second cold liquid circulation hose 1-18, hydrogen storage cylinder cable 1-19, hydrogen charging quick connector (female) 1-22, first cold liquid circulation quick connector (female) 1-23, wire harness plug (female) 1-24, and second cold liquid circulation quick connector (female) 1-25 are integrated on the filling connector fixing plate 1-20, fixing plate 1-21, slider 1-15, and arc guide rail 1-27, so that the filling interface assembly can slide up and down on the arc guide rail 1-27 via the slider 1-15. At the same time, the filling interface assembly is coaxial with the cylinder of the filling seat 1-26, which can ensure that after the hydrogen storage cylinder is placed on the filling seat 1-26, the filling interface assembly slides up and down to connect with the hydrogen storage cylinder filling interface. Specifically, the workflow of this filling equipment is as follows: Hydrogen filling mode: Place the solid hydrogen storage cylinder 2 to be filled on the filling base 1-26. The limit switch detects that the solid hydrogen storage cylinder is in place. Then, slide the filling interface assembly up and down to connect it with the solid hydrogen storage cylinder filling interface. Then, connect the wiring harness plug (female) 1-24 to the wiring harness plug (male) 2-8 on the solid hydrogen storage cylinder cap 2-6. At this time, the filling equipment recognizes the sensor data of the solid hydrogen storage cylinder. Start the coolant circulation system to allow the low-temperature coolant to enter the built-in heat exchange component to pre-cool the hydrogen storage material filling layer. After pre-cooling to the set temperature, the hydrogen filling pipeline is opened, and hydrogen enters the tank through the hydrogen channel of the quick-connect component. It is adsorbed by the hydrogen storage material. The heat generated during the hydrogen filling process is carried away by the continuously flowing coolant, maintaining the temperature inside the tank within the optimal adsorption range. Two temperature sensors 2-2 monitor the temperature distribution inside the tank in real time. If local overheating occurs, the main board automatically increases the coolant flow. After filling is completed, the main board automatically closes the hydrogen filling solenoid valve and stops the coolant circulation. After the operator unlocks the valve, the solid hydrogen storage cylinder unit can be removed for later use.

[0021] Hydrogen release mode (when active release of hydrogen for external equipment is required): Install the solid hydrogen storage cylinder 2 on the external hydrogen-using equipment, connect the filling interface, hydrogen filling port, hot liquid circulation port, and wiring harness plug, so that the heating liquid (such as hot water or heat transfer oil) enters the built-in heat exchange component to heat the hydrogen storage material, causing hydrogen to be released from the hydrogen storage material. The released hydrogen is supplied to the external hydrogen-using equipment through the hydrogen interface. At the same time, the external hydrogen-using equipment can also collect the temperature and strain data of the solid hydrogen storage cylinder in real time.

[0022] The present invention also provides a filling method, such as Figure 6 As shown, it includes: The solid hydrogen storage cylinder unit to be filled is placed on the filling base. The limit switch on the filling base is triggered to detect and confirm that the solid hydrogen storage cylinder is fully in place and outputs a valid positioning signal. Then, the filling interface assembly is driven to slide vertically up and down to complete the sealing docking between the filling interface assembly and the filling interface of the solid hydrogen storage cylinder. Then, the female wire harness connector is plugged into the male wire harness connector at the end cap of the solid hydrogen storage cylinder to establish a signal transmission path. The filling equipment collects and identifies the status data of the built-in sensors of the solid hydrogen storage cylinder in real time. After receiving the docking completion signal, the system starts the coolant circulation system, and the cryogenic coolant is introduced into the built-in heat exchange component inside the solid hydrogen storage bottle to perform forced pre-cooling treatment on the hydrogen storage material filling layer inside the bottle. When the temperature inside the tank is pre-cooled to ≤15℃, the pre-cooling is determined to be complete. The main board controller opens the solenoid valve of the hydrogen filling pipeline. Hydrogen enters the hydrogen storage tank through the hydrogen channel inside the quick interface component. The solid hydrogen storage material adsorbs and stores the hydrogen. During the hydrogen absorption process, the solid hydrogen storage material releases adsorption heat, which is carried away in real time by the continuously circulating coolant, so that the temperature inside the tank is stably maintained in the optimal adsorption working range of 0℃~30℃. Two independent temperature sensors are installed inside the bottle to monitor the temperature distribution in the upper and lower parts of the container, respectively. If any sensor detects a temperature exceeding the 35°C overheat warning value, the mainboard controller determines that local overheating has occurred inside the tank and automatically increases the coolant circulation flow rate by 1.5 to 2.5 times the original base flow rate to enhance heat dissipation and quickly bring the temperature inside the tank back to the optimal range. The deformation of the wave-shaped metal spring tube during the filling process is obtained. When the deformation of the wave-shaped metal spring tube is greater than the preset deformation threshold, the filling operation is stopped. Once the hydrogen filling reaches the rated hydrogen storage capacity of the hydrogen storage cylinder and the filling process is completed, the main board controller automatically closes the hydrogen filling solenoid valve, cuts off the hydrogen supply path, and simultaneously stops the operation of the coolant circulation system; after the operator completes the equipment safety unlocking, the filled solid hydrogen storage cylinder can be removed and put into subsequent use; Specifically, the coolant medium is ethylene glycol cryogenic coolant with an initial supply temperature of 5°C; the pre-cooling termination setting temperature is 15°C; the optimal adsorption temperature range for the hydrogen storage material is 0–30°C; the local overheat warning temperature is set at 35°C; and the coolant flow rate adjustment ratio is increased to twice the initial flow rate when overheating occurs.

[0023] In the description of this invention, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0024] While the invention has been described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood that different dependent claims and features described herein can be combined in ways different from those described in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other described embodiments.

Claims

1. A solid hydrogen storage cylinder, characterized in that, The device includes a bottle shell and an elastic element disposed within the bottle shell. One end of the elastic element has an opening and forms a cavity. A hydrogen storage material filling layer is disposed within the cavity of the elastic element. Radial and axial expansion gaps exist between the elastic element and the bottle shell. Multiple cooling conductive components penetrating the hydrogen storage material filling layer are also disposed within the cavity of the elastic element. The cooling conductive components are connected to a bottle cap. The elastic element is located between the bottle shell and the bottle cap. A monitoring component is connected to the bottle cap. The monitoring component includes a strain transmitter disposed on the outer wall of the elastic element and multiple temperature sensors disposed on the bottle shell. The multiple temperature sensors are spaced apart along the height direction of the bottle shell. The probes of the temperature sensors penetrate within the material filling layer. The strain transmitter is used to monitor the deformation of the elastic element.

2. A solid hydrogen storage cylinder according to claim 1, characterized in that, The elastic element is a wave-shaped metal spring tube.

3. A solid hydrogen storage cylinder according to claim 1, characterized in that, Each of the aforementioned cooling components includes two heat exchange tubes, which are U-shaped. Each heat exchange tube has radially extending heat-conducting fins distributed on its outer wall. The two heat exchange tubes are connected to each other to form a parallel heat exchange structure, and a heat exchange medium flows through the inner cavity of the parallel heat exchange structure.

4. A solid hydrogen storage cylinder according to claim 3, characterized in that, The bottle cap is also provided with a hydrogen channel interface, a coolant inlet interface, a coolant outlet interface, and a quick-change interface assembly for connection with filling equipment. The coolant inlet interface and the coolant outlet interface are connected to the parallel heat exchange structure.

5. A filling device, comprising a solid hydrogen storage cylinder as described in any one of claims 1 to 4, characterized in that, It also includes a main control box, on the top of which are installed multiple functional modules. The bottom of the main control box has a pipeline cavity, in which hydrogen filling process pipelines and liquid cooling circulation pipelines are installed. A filling seat extending horizontally is also provided on one side of the main control box. The filling seat matches the outer shell of the bottle. An integrated filling interface assembly for connecting to the solid hydrogen storage bottle is also provided on the side wall of the main control box near the filling seat.

6. A filling device according to claim 5, characterized in that, The integrated filling interface assembly includes an arc-shaped guide rail mounted on the main control box, a slider mounted on the arc-shaped guide rail, a fixing plate mounted on the slider, a filling connector fixing plate mounted on the fixing plate, and a first cold liquid circulation hose, a hydrogenation hose, and a second cold liquid circulation hose passing through the filling connector fixing plate. The ends of the first cold liquid circulation hose, the hydrogenation hose, and the second cold liquid circulation hose are all provided with quick connectors for connecting to the bottle cap.

7. A filling device according to claim 6, characterized in that, The filling interface assembly is coaxially arranged with the filling base, and the filling base is also provided with a limit switch.

8. A filling method applied to the solid hydrogen storage cylinder according to any one of claims 1 to 4, characterized in that, include: The temperature information of the hydrogen storage material at different heights during the filling process is obtained. When the temperature at any height exceeds the preset temperature threshold, the coolant circulation flow rate is increased. The deformation of the elastic component during the filling process is obtained. When the deformation of the elastic component exceeds the preset deformation threshold, the filling operation is stopped.

9. A filling method according to claim 8, characterized in that, Also includes: Before starting to fill with hydrogen, first check whether the solid hydrogen storage cylinder is in the correct position and whether the interfaces on the solid hydrogen storage cylinder are properly connected. Start the cooling liquid circulation to pre-cool the hydrogen storage material until its temperature drops to the preset start-up temperature before proceeding with the filling operation.

10. A filling method according to claim 9, characterized in that, Also includes: Obtain the filling pressure inside the solid hydrogen storage cylinder. When the filling pressure reaches the preset pressure threshold, close the hydrogen filling solenoid valve, stop the coolant circulation, and remove the solid hydrogen storage cylinder.

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