A hydrogen supply device based on magnesium hydride

Abstract

The application relates to the technical field of hydrogen storage application, and discloses a hydrogen supply device based on magnesium hydride, which comprises a hydrogen supply mechanism composed of a hydrogen storage assembly, a temperature control assembly and a hydrogen output assembly. The hydrogen storage assembly comprises a plurality of hydrogen storage tanks filled with magnesium hydride, hydrogen is generated through the thermal decomposition of the magnesium hydride by heating the heating jacket; the hydrogen pipeline part in the hydrogen output assembly is immersed in the cooling liquid in the cooling tank, and direct heat exchange is achieved through the pipeline wall, and no additional heat exchanger is needed. The device adopts a double-circuit heat management structure of the heating jacket and the cooling tank, replaces the traditional heat conduction oil pipeline system, the system volume is reduced by more than 30%, the amount of heat conduction oil is reduced by 90%, and the leakage risk and maintenance difficulty are significantly reduced. Meanwhile, the cooling structure can effectively reduce the output hydrogen temperature, and improve the hydrogen use safety and application range.

Description

Technical Field

[0001] This solution relates to the field of hydrogen storage application technology, specifically to a hydrogen supply device based on magnesium hydride. Background Technology

[0002] Hydrogen storage methods are diverse, but currently, practical applications mainly fall into three categories: high-pressure gaseous hydrogen storage, cryogenic liquid hydrogen storage, and metal solid-state hydrogen storage. High-pressure gaseous hydrogen storage is the most commonly used method, involving compressing hydrogen gas to tens of megapascals and storing it in a specialized container. The disadvantages of this technology include the risk of leakage due to the high pressure and its unsuitability for long-distance transportation. Cryogenic liquid hydrogen storage involves cooling hydrogen gas to -253°C, converting it into a liquid state, and then storing it in a specially designed insulated vacuum container. Its disadvantages include high energy consumption during liquefaction and evaporation losses; this technology is primarily used in the aerospace field and has limited application in civilian sectors. Metal solid-state hydrogen storage involves the reaction of hydrogen gas with a metal under certain temperature and pressure conditions to form hydrides. Heating or depressurization of these hydrides then decomposes the hydrides to produce hydrogen gas. Among metal solid-state hydrogen storage materials, magnesium-based hydrogen storage materials have a theoretical mass hydrogen storage density as high as 7.6 wt% and a volumetric hydrogen storage density of 110 kg / m³. 3 It is 1000 times stronger than gaseous hydrogen and 1.5 times stronger than liquid hydrogen. It is considered a highly promising type of solid hydrogen storage material.

[0003] Magnesium hydride materials exhibit stable performance at room temperature and pressure, making them suitable for long-distance, large-scale, and time-dependent hydrogen storage and transportation. However, in the hydrogen supply phase, most scenarios employ heat exchange technology using heat transfer oil as the medium, resulting in relatively complex hydrogen release systems. Chinese patent CN116164229A discloses a compact, miniaturized, box-type integrated solid-state hydrogen storage and release system using magnesium hydride as the carrier. This system utilizes heating components to heat the magnesium hydride within the solid-state hydrogen storage container to 290-300℃, causing the magnesium hydride to pyrolyze and generate hydrogen. However, the hydrogen produced by this method reaches a relatively high temperature, which imposes certain limitations on its application. Summary of the Invention

[0004] The present invention aims to provide a hydrogen supply device based on magnesium hydride, which reduces the temperature of the output gas to reduce the limitations of solid-state hydrogen storage and expand the application scenarios of solid-state hydrogen storage technology.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a hydrogen supply device based on magnesium hydride, comprising a hydrogen supply mechanism, which includes a hydrogen storage component, a temperature control component, and a hydrogen output component. The hydrogen storage component includes several magnesium hydride storage tanks, each containing a tank body connected to a hydrogen pipeline and filled with magnesium hydride capable of thermal decomposition. The temperature control component includes a cooling tank and a heating jacket. The cooling tank contains coolant, and the heating jacket is fitted onto the outer wall of the tank body and can heat the tank body. The hydrogen output component includes a hydrogen pipeline, which is partially immersed in the coolant and can exchange heat with the coolant through the pipeline wall.

[0006] The beneficial effects of this solution are as follows: In existing technologies, the release of hydrogen from magnesium hydride relies on a complex heat transfer oil circulation system, resulting in bulky equipment and high maintenance costs. This invention innovatively employs a dual-loop thermal management structure combining a heating jacket and a cooling tank: the heating jacket directly covers the tank body, achieving precise temperature rise (290-300℃) through electric heating or hot fluid circulation, replacing the traditional external piping network for heat exchange with heat transfer oil; the cooling tank contains coolant, immersing the hydrogen pipeline within it, utilizing direct heat exchange through the pipe walls, eliminating the need for additional heat exchangers. This design reduces the system volume by more than 30%, while simultaneously reducing heat transfer oil consumption by 90%, significantly lowering leakage risk and maintenance complexity. Furthermore, the cooling tank design lowers the temperature of the output gas, expanding the usability of the hydrogen.

[0007] In addition, this solution sets up multiple magnesium hydride storage tanks and uses these tanks to form a modular layout to support batch heating and alternating hydrogen release. This ensures continuous hydrogen supply while avoiding the energy loss caused by the frequent start-up and shutdown of a single storage tank in traditional systems.

[0008] Furthermore, it also includes an installation component, which includes a frame with several open mounting positions, the number of which is adapted to the number of magnesium hydride storage tanks.

[0009] Beneficial effects: The open installation design allows the magnesium hydride hydrogen storage tank and hydrogen pipeline to be in an open environment, avoiding the safety hazards caused by hydrogen leakage due to the box-type structure.

[0010] Furthermore, a bottom bracket is provided at the bottom of the frame, and a mounting hole is provided on the bottom bracket. The diameter of the mounting hole is smaller than the diameter of the tank. The tank is placed on the bottom bracket and fixed by the mounting position. The cooling tank is fixed on the frame and located below the bottom bracket.

[0011] Furthermore, the temperature control component also includes a temperature control box, which is externally mounted on the frame and electrically connected to the heating jacket, and can control the heating power of the heating jacket.

[0012] Furthermore, the heating jacket includes an inner wall layer, a heating layer, an insulation layer, and an outer shell layer. The inner wall layer and the insulation layer are respectively disposed on both sides of the heating layer. The inner wall layer is in contact with the outer wall of the tank, and the outer shell layer is disposed on the outside of the insulation layer.

[0013] Furthermore, the hydrogen output assembly also includes a manifold and a buffer tank. The hydrogen pipeline includes an inlet and an outlet. The manifold is fixed to the frame and connects the tank to the inlet of the hydrogen pipeline. The buffer tank is installed on the hydrogen pipeline and located after the cooling tank. By adding a cooling tank and a buffer tank at the hydrogen outlet, the output hydrogen is stabilized and cooled, thus meeting the application requirements of hydrogen.

[0014] Furthermore, it also includes an automatic control module, which comprises a pressure sensor, a temperature sensor, a mass flow controller, and a PLC. The pressure sensor, temperature sensor, and mass flow controller are electrically connected to the PLC. The pressure sensor is located inside the buffer tank and transmits the pressure value to the PLC. The mass flow controller is located on the hydrogen pipeline, between the outlet and the buffer tank, and transmits the hydrogen flow rate value to the PLC. The PLC can set the output flow rate and control the temperature control box and mass flow controller in conjunction with the set output flow rate to achieve stable hydrogen output. The PLC can read and output the working status, heating power, and temperature and pressure values ​​of the output hydrogen for each magnesium hydride storage tank in real time, providing a clear and concise overview. Simultaneously, the PLC can set the output hydrogen flow rate to meet different operating conditions, achieved through the linkage of the flexible heating jacket and the mass flow controller; and it can calculate the cumulative hydrogen release mass to monitor the remaining hydrogen balance in real time.

[0015] Furthermore, several partition plates are fixed inside the tank. The outer diameter of the partition plates is adapted to the inner wall of the tank, and several channels for hydrogen flow are respectively provided at the center and the edge. A hydrogen storage cavity is formed between adjacent partition plates. The hydrogen storage cavity contains a hydrogen storage component, which includes a hydrogen storage material disk and a wrapping layer. The wrapping layer is a flexible material used to wrap and shape the magnesium-based hydrogen storage material disk around its perimeter and bottom, and can provide heat transfer channels and radial hydrogen channels. A buffer layer is provided outside the wrapping layer. The buffer layer is located between the tank and the wrapping layer, and has several concave and convex folds distributed along the inner and outer circumference.

[0016] Beneficial effects: During the cyclic charging and discharging of hydrogen, the magnesium-based hydrogen storage material disc expands and contracts due to stress, causing damage to the gas guide tube. In this solution, the gap between the buffer layer folds and the tank body is used as the gas guide tube. At the same time, the flexible wrapping layer has good ductility and flexible separation characteristics, which allows it to deform without breaking under stress compression. This ensures that the pressed magnesium-based hydrogen storage material maintains its disc shape during the charging and discharging process, and the stress generated during the charging and discharging process is further decomposed by the buffer layer, reducing the stress impact on the tank body during the charging and discharging process and increasing the service life of the alloy hydrogen storage tank.

[0017] Furthermore, the coating layer is a graphite cylindrical structure with an open top, and several micropores are provided around the sides and bottom of the graphite cylindrical structure. The design of the micropores ensures the passage of gas during the filling and degassing process. At the same time, by limiting the diameter of the micropores, it can prevent the hydride metal powder from overflowing from the micropores during the filling process.

[0018] Furthermore, the magnesium hydride storage tank also includes a valve assembly, which includes a valve seat and a valve. The valve seat is fixedly connected to the tank body, and a filter is fixed on the valve seat. The valve is threadedly connected to the valve seat. Attached Figure Description

[0019] Figure 1 This is a three-dimensional diagram of an embodiment of the present invention;

[0020] Figure 2 for Figure 1 The left view;

[0021] Figure 3 for Figure 1 Rear view;

[0022] Figure 4 This is a connection diagram of an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the internal structure of the hydrogen storage tank according to an embodiment of the present invention;

[0024] Figure 6 This is a three-dimensional view of the hydrogen storage device according to an embodiment of the present invention;

[0025] Figure 7 This is a schematic diagram of the split structure of the hydrogen storage component according to an embodiment of the present invention;

[0026] Figure 8 This is a three-dimensional view of the partition plate in an embodiment of the present invention.

[0027] The reference numerals in the accompanying drawings include: hydrogen storage assembly 100, hydrogen storage tank 110, tank body 111, partition plate 120, upper end cap 114, lower end cap 113, valve seat 121, valve 122, filter 123, hydrogen storage component 130, buffer layer 131, wrapping layer 132, disc 133, hose 141, manifold 142, frame 210, bottom bracket 220, fumaron 230, heating jacket 310, cooling tank 320, temperature control box 330, mass flow controller 410, PLC 420, buffer tank 430, purge valve 510, safety valve 511, and shut-off valve 512. Detailed Implementation

[0028] Example 1

[0029] Example 1 is basically as shown in the appendix. Figure 1-4 As shown, Figure 1-4 The illustrated hydrogen supply device based on magnesium hydride includes a hydrogen supply mechanism and an installation assembly. The hydrogen supply mechanism includes a hydrogen storage assembly 100, a hydrogen output assembly, and a temperature control assembly. The hydrogen storage assembly 100 includes several magnesium hydride storage tanks, each of which includes a tank body 111. A valve 122 is welded onto the tank body 111. The tank body 111 is filled with magnesium hydride hydrogen storage material. When the magnesium hydride hydrogen storage material is heated to 200-300℃, the magnesium hydride hydrogen storage material decomposes into hydrogen gas, which is then discharged through the valve 122.

[0030] The hydrogen output assembly includes a manifold 142, a hydrogen pipeline, and a buffer tank 430. A corrugated hose 141 is installed between the manifold 142 and the magnesium hydride storage tank. The manifold 142 is fixed to the frame 210 and is connected to the valves 122 of the magnesium hydride storage tanks through the corrugated hoses 141, thereby combining the hydrogen output from multiple magnesium hydride storage tanks through the manifold 142. The hydrogen pipeline is connected to the outlet of the manifold 142 to form a transport pipeline, which can transport the hydrogen output from the manifold 142 through the transport pipeline. The hydrogen pipeline outlet uses a compression fitting connection, simplifying the connection process. A safety valve 511 is installed on the hydrogen pipeline to release pressure when blockage occurs or the magnesium hydride storage tank 110 releases hydrogen too quickly, causing excessive hydrogen pressure. A buffer tank 430 is installed on the hydrogen pipeline. In this embodiment, four magnesium hydride storage tanks are used, each capable of independent operation and disassembly / replacement. In this embodiment, the tank 111 measures φ130mm × 900mm, weighs 15kg, and stores approximately 0.5kg of hydrogen, allowing for easy movement and installation by a single person.

[0031] The temperature control assembly includes a heating jacket 310, a temperature control box 330, and a cooling tank 320. The heating jacket is installed in the middle two layers of the frame 210 with four round holes, and can wrap the tank 111. The temperature control box 330 is fixed to the left side of the frame 210 and electrically connected to the heating jacket 310. The cooling tank 320 is located below the bottom bracket 220 and can cool the hydrogen flowing into the buffer tank 430. In this embodiment, the heating jacket 310 is a flexible heating jacket. Specifically, the thickness of the flexible heating jacket is 35mm, and it includes an inner wall layer, a heating layer, an insulation layer, and an outer shell layer from the inside out. The inner wall layer is in close contact with the outer wall of the magnesium hydride storage tank 110. During heating, heat is transferred to the magnesium hydride material inside through the inner wall layer and the tank 111. The temperature control box 330 has an explosion-proof rating of not less than ExdIICT4 and is installed on the left side of the frame 210 by wall mounting and electrically connected to the heating jacket 310. The temperature control box 330 has four independent control circuits for heating the magnesium hydride storage tank 110, such as... Figure 3 As shown, the temperature control box 330 includes a temperature control PLC 420, which has functions such as main switch on / off, rotary button, power indicator, and operation indicator. It can also display the current temperature set value and the current actual temperature value of each magnesium hydride storage tank 110. The cooling tank 320 is set in the installation space below the bottom bracket 220 and is equipped with a water inlet and a water outlet. The hydrogen pipeline runs in a "serpentine" pattern in the cooling tank 320 to increase the contact area between the hydrogen pipeline and the cooling water. The hydrogen obtained by pyrolysis in the magnesium hydride storage tank 110 is usually above 200°C. By setting up heat exchange with the external circulating water through the pipeline wall, the temperature of the hydrogen in the pipeline can be reduced. At the same time, the heating jacket 310 and the temperature control box 330 adopt an explosion-proof design to avoid safety accidents caused by electrical faults or operational errors.

[0032] The mounting assembly includes a frame 210 and a bottom bracket 220. Casters 230 are installed under the frame 210 for easy movement and leveling of the entire unit. The frame 210 has several open mounting positions, the number of which matches the number of magnesium hydride storage tanks 110. The bottom bracket 220 is fixed to the bottom of the frame 210, forming an installation space between the bottom bracket 220 and the frame 210 and providing support for the magnesium hydride storage tanks 110. Specifically, as shown... Figure 1As shown, in this embodiment, the frame 210 is a three-dimensional four-layer structure formed by welding steel pipes and plates of ordinary carbon steel. The middle two layers have four φ200mm round holes to form four installation positions for the magnesium hydride storage tanks 110. The bottom bracket 220 is also made of ordinary carbon steel and is fixed to the frame 210 by six sets of bolt connections. The top of the bottom bracket 220 has four φ100mm round holes for alignment with the lower end cap 113 of the magnesium hydride storage tank 110, which serves as a support. At the same time, the overall device has a simple structure and is equipped with casters 230 at the bottom, which can easily move the entire device to meet the needs of hydrogen use in different locations.

[0033] In use, a flexible electric heating mantle is used to heat the magnesium hydride storage tank 110 to 200-300°C, causing the magnesium hydride material to decompose and generate hydrogen gas. The generated hydrogen gas flows through a stainless steel corrugated hose 141 to a manifold 142 for collection, and then through a cooling tank 320 and a buffer tank 430 to the user end. At the same time, coolant flows into the cooling tank 320 from the inlet and flows out from the outlet to cool the hydrogen gas flowing through the cooling tank 320, ensuring that the temperature of the hydrogen gas entering the buffer tank 430 and the user end is suitable.

[0034] During operation, the four magnesium hydride hydrogen storage tanks 110 operate independently. The valves of all or part of the tanks can be opened according to the required hydrogen flow rate. Simultaneously, hydrogen can be continuously output without shutdown during tank disassembly and replacement. After hydrogen is discharged from the magnesium hydride hydrogen storage tank 110, it can be replaced. Through the cooperation between the corrugated hose 141, the flexible heating jacket, and the tank 110, the operator only needs to remove the corrugated hose 141 and loosen the flexible heating jacket to remove the tank 110 from the top of the unit. The replaced tank 110 is then transferred to a hydrogen plant for refilling until the next use. By setting up four independent magnesium hydride hydrogen storage tanks, different operating conditions can be met.

[0035] Example 2

[0036] Based on Example 1, such as Figure 4 As shown, to prevent the introduction of gaseous impurities during the replacement process, a purge valve 510 and a shut-off valve 512 are installed downstream of the hydrogen pipeline between the manifold 142 and the cooling tank 320. Before disassembling the magnesium hydride storage tank 110, the shut-off valve 512 is closed. After installing the new magnesium hydride storage tank 110, its valve is first opened, and the purge valve 510 is opened intermittently to purge the pipeline. At the same time, impurity gases in the tank 111 can also be discharged, resulting in higher purity hydrogen supplied subsequently.

[0037] Example 3

[0038] Based on Embodiment 1, an automatic control module is also included. The automatic control module includes a PLC420. The PLC420 is installed on the right side of the frame 210 and electrically connected to the temperature control box 330. The temperature control box 330 transmits information such as the working status, heating power and temperature of each magnesium hydride storage tank 110 to the PLC420.

[0039] At the same time, such as Figure 4 As shown, a pressure sensor PT01 for monitoring the hydrogen pressure in the buffer tank 430 is installed above the buffer tank 430. A temperature sensor TT01 for detecting the hydrogen temperature in the pipeline and a mass flow controller 410 for measuring and controlling the hydrogen flow rate in the pipeline are sequentially installed at the outlet of the buffer tank 430. Both the pressure sensor PT01 and the temperature sensor TT01 are electrically connected to the PLC 420 and transmit the pressure and outlet temperature values ​​from the buffer tank 430 to the PLC 420. The mass flow controller 410 transmits the hydrogen flow rate value to the PLC 420. Thus, the PLC 420 displays the operating status, heating power, output hydrogen temperature, and output hydrogen pressure of the four magnesium hydride tanks.

[0040] This allows the hydrogen supply device to operate in two modes: one is to set the temperature value of PLC420 in temperature control box 330, and when the temperature of magnesium hydride hydrogen storage tank 110 reaches the set value, hydrogen is output under constant temperature conditions, and the actual flow value in the pipeline is measured by mass flow controller 410.

[0041] Secondly, the system is implemented through a program. It sets the required output flow rate, judges the pressure value and pressure change in the buffer tank 430, and achieves stable hydrogen output through the linkage of the actuator temperature control box 330 and the mass flow controller 410. Furthermore, the PLC 420 calculates the mass of hydrogen released by the device within a certain time period by integrating and resetting the flow rate, and monitors the remaining hydrogen balance in the magnesium hydride storage tank 110 in real time.

[0042] Example 4

[0043] Example 4 is basically the same as Example 1, except that, as Figure 5-8 As shown, the magnesium hydride storage tank includes a tank body 111 and several hydrogen storage components 130. The tank body 111 includes a cylindrical structure, and a partition plate 120 is welded inside the cylindrical structure. The outer diameter of the partition plate 120 is the same as the inner diameter of the cylindrical body. Figure 8 As shown, the partition plate 120 has several through holes evenly distributed on its circumference and circular surface to form channels for hydrogen flow. A hydrogen storage cavity is formed between adjacent partition plates 120, and a hydrogen storage component 130 is disposed within the hydrogen storage cavity. Figure 5As shown, the cylindrical structure has a lower end cap 113 and an upper end cap 114 welded to both ends, and a buffer structure is formed by the gap between the lower end cap 113 and the upper end cap 114 and the partition. The upper end cap 114 has an opening at the top, and a valve assembly is provided at the opening. The valve assembly includes a valve seat 121 and a valve 122. The valve seat 121 is welded to the opening and a filter 123 is provided at the bottom. The filter 123 is interference-fitted with the bottom of the valve seat 121, and the valve 122 is threadedly connected to the valve seat 121.

[0044] like Figure 6 , Figure 7 As shown, the hydrogen storage component 130 includes, from the outside in, a buffer layer 131, a wrapping layer 132, and a magnesium-based hydrogen storage material disk 133. Specifically, the buffer layer 131 is made of aluminum alloy that can withstand high temperatures of 300-500℃. A cylindrical aluminum alloy is placed between the cylinder and the wrapping layer 132 to form the buffer layer 131, and several concave and convex folds are distributed along the circumference, so that there is a large gap in the axial direction, providing a channel for the flow of hydrogen. The wrapping layer 132 is a graphite cylindrical structure with an open top and including the bottom. Several micropores are provided on the bottom and sidewalls of the graphite cylindrical structure. The diameter of the micropores is 0.2-0.7mm. In this embodiment, the diameter of the micropores is 0.5mm. The thickness of the aluminum alloy is 5mm, and the included angle α on both sides of the concave and convex folds is 60°. The magnesium-based hydrogen storage material is filled in the graphite wrapping layer 132 and is kept in the shape of a disk 133 under the restriction of the graphite wrapping layer 132, forming a magnesium-based hydrogen storage material disk 133.

[0045] In use, the magnesium-based hydrogen storage material in the magnesium-based hydrogen storage material disk 133 decomposes to generate hydrogen gas. The hydrogen gas diffuses to the graphite coating layer 132, is transmitted to the aluminum material buffer layer 131 through the micropores around the graphite coating layer 132, and flows to the upper end cap 114 through the gap between the buffer layer 131 and the inner wall of the cylinder. After being filtered by the filter 123, it is discharged through the valve 122.

[0046] When the hydrogen in the alloy hydrogen storage tank 110 is depleted, it is transferred to a hydrogen plant for refilling. During the cyclic refilling and discharging process, the magnesium-based hydrogen storage material disk 133 expands and contracts due to stress. The graphite coating layer 132 has good ductility and flexible separation characteristics, allowing it to deform without breaking under stress compression, while also ensuring that the pressed magnesium-based hydrogen storage material maintains the shape of the disk 133 during the refilling and discharging process. The generated stress is... Figure 5The buffer layer 131 shown further decomposes, reducing the stress impact on the cylinder 22 during hydrogen charging and discharging, and increasing the service life of the alloy hydrogen storage tank 110. The buffer layer 131 is made of aluminum alloy material resistant to high temperatures of 300~500℃, and is tightly bonded to the intermediate graphite layer. Preferably, the thickness is 5mm, and the inclination angles of the inner and outer pleats are 60° respectively. Hydrogen undergoes adsorption and desorption in the magnesium-based hydrogen storage material disk 133, which is equivalent to purifying the hydrogen. Therefore, the hydrogen can be transformed from ordinary hydrogen into high-purity hydrogen or even ultra-high-purity hydrogen, and the quality of the hydrogen is greatly improved. Moreover, there is no risk of leakage during storage and transportation, improving the convenience and safety of use.

[0047] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that the technical means for solving problems in the above embodiments of the present invention can be used in combination to solve multiple technical problems simultaneously. For those skilled in the art, several modifications and improvements can be made without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A hydrogen supply device based on magnesium hydride, characterized in that: The system includes a hydrogen supply mechanism, comprising a hydrogen storage component, a temperature control component, and a hydrogen output component. The hydrogen storage component includes several magnesium hydride storage tanks, each consisting of a tank body connected to a hydrogen pipeline and filled with magnesium hydride capable of thermal decomposition. The temperature control component includes a cooling tank filled with coolant and a heating jacket fitted onto the outer wall of the tank body to heat it. The hydrogen output component includes a hydrogen pipeline partially submerged in the coolant and capable of heat exchange with the coolant through the pipeline wall. Several [unclear - possibly referring to specific components or components] are fixed inside the tanks. The partition plate has an outer diameter that fits the inner wall of the tank, and several channels for hydrogen flow are provided at the center and the edge. A hydrogen storage cavity is formed between adjacent partition plates. The hydrogen storage cavity contains a hydrogen storage component, which includes a hydrogen storage material disc and a wrapping layer. The wrapping layer is a flexible material used to wrap and shape the magnesium-based hydrogen storage material disc around its perimeter and bottom, and can provide heat transfer channels and radial hydrogen channels. A buffer layer is provided outside the wrapping layer. The buffer layer is located between the tank and the wrapping layer, and has several concave and convex folds distributed along the inner and outer circumference. The encapsulation layer is a graphite cylindrical structure with an open top, and several micropores are provided around the perimeter and bottom of the graphite cylindrical structure; The buffer layer is made of aluminum alloy material that is tightly bonded to the wrapping layer.

2. The hydrogen supply device based on magnesium hydride according to claim 1, characterized in that: It also includes an installation component, which includes a frame with several open mounting positions, the number of which is adapted to the number of magnesium hydride storage tanks.

3. A hydrogen supply device based on magnesium hydride according to claim 2, characterized in that: The bottom of the frame is also equipped with a bottom bracket with mounting holes. The diameter of the mounting holes is smaller than the diameter of the tank. The tank is placed on the bottom bracket and fixed by the mounting position. The cooling tank is fixed on the frame and located below the bottom bracket.

4. A hydrogen supply device based on magnesium hydride according to claim 3, characterized in that: The temperature control component also includes a temperature control box, which is externally mounted on the frame and electrically connected to the heating jacket, and can control the heating power of the heating jacket.

5. A hydrogen supply device based on magnesium hydride according to claim 4, characterized in that: The heating jacket includes an inner wall layer, a heating layer, an insulation layer, and an outer shell layer. The inner wall layer and the insulation layer are respectively located on both sides of the heating layer. The inner wall layer is in contact with the outer wall of the tank, and the outer shell layer is located outside the insulation layer.

6. A hydrogen supply device based on magnesium hydride according to claim 5, characterized in that: The hydrogen output assembly also includes a manifold and a buffer tank. The hydrogen pipeline includes an inlet end and an outlet end. The manifold is fixed on the frame and connects the tank to the inlet end of the hydrogen pipeline. The buffer tank is installed on the hydrogen pipeline and located behind the cooling tank.

7. A hydrogen supply device based on magnesium hydride according to claim 6, characterized in that: It also includes an automatic control module, which includes a pressure sensor, a temperature sensor, a mass flow controller, and a PLC. The pressure sensor, temperature sensor, and mass flow controller are electrically connected to the PLC. The pressure sensor is installed inside the buffer tank and can transmit the pressure value inside the buffer tank to the PLC. The mass flow controller is installed on the hydrogen pipeline, located between the outlet and the buffer tank, and can transmit the hydrogen flow rate value to the PLC. The PLC can set the output flow rate and control the temperature control box and the mass flow controller to work together according to the set output flow rate to achieve stable hydrogen output.

8. A hydrogen supply device based on magnesium hydride according to claim 1, characterized in that: The magnesium hydride storage tank also includes a valve assembly, which includes a valve seat and a valve. The valve seat is fixedly connected to the tank body, and a filter is fixed on the valve seat. The valve is threadedly connected to the valve seat.

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