Hydrogen storage powder grid compression component and its assembly method, and solid hydrogen storage device

Abstract

The application provides a hydrogen storage powder grid compression component and an assembling method thereof, and a solid-state hydrogen storage device. The hydrogen storage powder grid compression component comprises a limiting component with multiple grids and a cake bed inlaid in the limiting component. The cake bed comprises multiple sub-cakes, each of which is completely filled in a corresponding grid. The material of the cake bed comprises solid-state hydrogen storage powder, heat transfer material and adhesive. The heat transfer material comprises at least one of copper, aluminum and expanded graphite. The application can effectively eliminate the stress concentration of the tank caused by the subsequent hydrogen absorption expansion of the solid-state hydrogen storage powder by inlaying the cake bed in the limiting component and completely filling each sub-cake in the cake bed in a corresponding grid, so that the solid-state hydrogen storage device can safely and efficiently store hydrogen. Meanwhile, the cake bed can effectively improve the heat transfer performance of the solid-state hydrogen storage powder due to containing high heat transfer material, thereby improving the hydrogen charging and discharging performance of the solid-state hydrogen storage device.

Description

Technical Field

[0001] This invention relates to the field of hydrogen storage and production technology, and in particular to a hydrogen storage powder grid pressing component and its assembly method, and a solid hydrogen storage device. Background Technology

[0002] Hydrogen energy is a renewable and clean energy source with advantages such as high energy density and environmental friendliness. The utilization of hydrogen energy mainly involves three technologies: large-scale hydrogen production, hydrogen fuel cell technology, and hydrogen source technology. How to safely and efficiently store hydrogen is a crucial issue that urgently needs to be addressed.

[0003] Among numerous hydrogen source technologies, solid-state hydrogen storage technology boasts advantages such as high hydrogen storage density, safe and convenient storage and transportation, fast hydrogen release response, high volumetric hydrogen storage density, no greenhouse gas emissions, and compatibility with proton exchange membrane fuel cells. Solid-state hydrogen storage also features low pressure, low leakage risk, and good reliability, making it a promising technology for widespread application. Common solid-state hydrogen storage materials, such as AB-type TiFe, AB2-type TiMn, AB5-type LaNi5, and vanadium-based solid solution hydrogen storage materials, are typically packed into pressure vessels in powder form. To achieve higher hydrogen storage density, the packing density of the hydrogen storage powder is often quite high. The expansion of the hydrogen storage alloy can cause stress concentration in the container, damaging the pressure vessel's sealing structure and increasing the likelihood of hydrogen leakage.

[0004] Therefore, there is an urgent need for a hydrogen storage powder grid pressing component and its assembly method, as well as a solid hydrogen storage device, to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide a hydrogen storage powder mesh press-fit component and its assembly method, as well as a solid hydrogen storage device, which can effectively avoid the technical problem of stress concentration in the tank caused by the expansion of hydrogen storage alloy due to hydrogen absorption.

[0006] To solve the above-mentioned technical problems, the present invention first provides a hydrogen storage powder grid pressing component, including a limiting member having multiple grids and a cake bed embedded in the limiting member. The cake bed includes multiple sub-cakes, each of which is completely filled in the corresponding grid. The materials of the cake bed include solid hydrogen storage powder, heat transfer materials and binders. The heat transfer materials include at least one of copper, aluminum and expanded graphite.

[0007] Preferably, the solid hydrogen storage powder includes any one of Ti-based solid solution hydrogen storage materials, V-based solid solution hydrogen storage materials, and AB5-type solid solution hydrogen storage materials.

[0008] Preferably, the adhesive includes any one of polytetrafluoroethylene, fluororubber, perfluoroether rubber, and vulcanized silicone rubber.

[0009] Preferably, the limiting component is made of magnesium alloy.

[0010] Preferably, the hydrogen storage powder mesh press-fit component includes a first through hole located in the central region of the limiting member and a plurality of second through holes arranged around the first through hole, wherein both the first through hole and the second through holes completely penetrate the hydrogen storage powder mesh press-fit component. In this configuration, the distance between each second through hole and the first through hole is equal, and the distance between two adjacent second through holes is equal.

[0011] Accordingly, the present invention also provides an assembly method for a hydrogen storage powder mesh press-fit component as described in any of the above claims, the method comprising: S10 provides a compacted base plate, which includes multiple columnar protrusions; S20 provides a limiting component and engages the limiting component in the compacted base plate, with each columnar protrusion penetrating the corresponding grid; S30, the mixed powder formed by mixing solid hydrogen storage powder, heat transfer material and binder is filled into the compacted base plate; S40, apply pressure to spread and compact the mixed powder to obtain a cake bed; S50, the cake bed is demolded to remove the compacted bottom plate, and finally the hydrogen storage powder grid press part is obtained.

[0012] Preferably, in step S30, the packing density of the mixed powder is 3-5 kg / L.

[0013] Preferably, in step S40, the compressive strength is 300~500MPa.

[0014] Accordingly, the present invention also provides a solid hydrogen storage device, including a hydrogen storage container having a receiving cavity, wherein a plurality of hydrogen storage powder mesh pressing parts as described above are disposed in the receiving cavity, or the hydrogen storage powder mesh pressing parts are assembled by an assembly method that provides a plurality of hydrogen storage powder mesh pressing parts as described above.

[0015] Preferably, the cavity is also provided with a heat exchange tube and a gas guide tube. The heat exchange tube is a U-shaped tube, and both ends of the U-shaped tube and the gas guide tube pass through multiple hydrogen storage powder grid pressing components.

[0016] The beneficial effects of this invention are as follows: Unlike existing technologies, this invention provides a hydrogen storage powder grid pressing component and its assembly method, as well as a solid-state hydrogen storage device. The hydrogen storage powder grid pressing component includes a limiting member with multiple grids and a cake bed embedded within the limiting member. The cake bed includes multiple sub-cakes, each of which completely fills its corresponding grid. The material of the cake bed includes solid hydrogen storage powder, a heat transfer material, and a binder. The heat transfer material includes at least one of copper, aluminum, and expanded graphite. By embedding the cake bed within the limiting member, and ensuring that each sub-cake completely fills its corresponding grid, this invention tightly confines the cake bed containing solid hydrogen storage powder within the grid. This effectively eliminates stress concentration in the tank caused by the subsequent hydrogen absorption and expansion of the solid hydrogen storage powder, thereby enabling the solid-state hydrogen storage device to safely and efficiently store hydrogen. Simultaneously, because the cake bed contains a high heat transfer material, it effectively improves the heat transfer performance of the solid hydrogen storage powder, thereby enhancing the hydrogen charging and discharging performance of the solid-state hydrogen storage device. Attached Figure Description

[0017] Figure 1 A schematic diagram of the limiting component in the hydrogen storage powder mesh press-fit part provided by the present invention; Figure 2 A schematic diagram of the structure of the hydrogen storage powder mesh press-fit component provided by the present invention; Figure 3 A flowchart illustrating the assembly method of the hydrogen storage powder mesh press-fit component provided by the present invention; Figure 4 A schematic diagram of the compaction base plate in the assembly method of the hydrogen storage powder mesh pressing component provided by the present invention; Figure 5 A schematic diagram of the structure after the compaction base plate and the limiting component are assembled in the assembly method of the hydrogen storage powder mesh pressing part provided by the present invention; Figure 6 A schematic diagram of the structure of the hydrogen storage powder grid press-fit component and the heat exchange tube in the solid hydrogen storage device provided by the present invention. Figure 7 The hydrogen release curves of the solid hydrogen storage device provided in Embodiment 1 of the present invention under different temperatures, pressures and hydrogen release flow rates are shown. Figure 8a This is a diagram showing the circumferential and axial hydrogen absorption strain curves of the hydrogen storage container at point two on the surface of the tank in the solid hydrogen storage device provided in Embodiment 1 of the present invention. Figure 8b The hydrogen absorption strain curves of the hydrogen storage container in the solid hydrogen storage device provided in Embodiment 1 of the present invention are shown in the circumferential and axial directions at point four on the surface of the tank. In the figure, 100 - hydrogen storage powder grid pressing component; 10 - limiting component; 11 - grid; 101 - first through hole; 102 - second through hole; 20 - cake bed; 201 - sub-cake; 30 - compacted bottom plate; 31 - bottom support plate; 32 - side plate; 33 - columnar protrusion; 40 - heat exchange tube. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0019] To address the technical problem of stress concentration in the tank caused by hydrogen absorption expansion of existing hydrogen storage alloys, this invention provides a hydrogen storage powder grid pressing component 100 and its assembly method, as well as a solid hydrogen storage device. By embedding a cake bed 20 within a limiting member 10, with each sub-cake 201 of the cake bed 20 completely filling the corresponding grid 11, the cake bed 20 containing solid hydrogen storage powder is tightly confined within the grid 11. This effectively eliminates the stress concentration in the tank caused by subsequent hydrogen absorption expansion of the solid hydrogen storage powder, thereby enabling the solid hydrogen storage device to safely and efficiently store hydrogen.

[0020] To achieve the above objectives, the present invention provides the following technical solution: Please see Figures 1 to 2 , Figure 1 This is a schematic diagram of the structure of the limiting member 10 in the hydrogen storage powder mesh pressing part 100 provided by the present invention. Figure 2 The present invention provides a schematic diagram of the structure of a hydrogen storage powder grid pressing component 100; wherein, the hydrogen storage powder grid pressing component 100 includes a limiting member 10 having multiple grids 11 and a cake bed 20 embedded in the limiting member 10, the cake bed 20 including multiple sub-cakes 201, each sub-cake 201 being completely filled in the corresponding grid 11. The material of the cake bed 20 includes solid hydrogen storage powder, heat transfer material and binder, and the heat transfer material includes at least one of copper, aluminum and expanded graphite.

[0021] In this embodiment of the invention, the limiting member 10 has multiple grids 11 with identical shapes, and each grid 11 is the same size; the limiting member 10 can connect loose materials into a whole, improving the integrity and collaborative working ability of the materials.

[0022] Preferably, the limiting member 10 is a lightweight magnesium alloy material with high yield strength and high thermal conductivity.

[0023] In this embodiment of the invention, the solid hydrogen storage powder includes any one of Ti-based solid solution hydrogen storage materials, V-based solid solution hydrogen storage materials, and AB5-type solid solution hydrogen storage materials.

[0024] In this embodiment of the invention, the solid hydrogen storage powder includes a binder, which includes any one of polytetrafluoroethylene, fluororubber, perfluoroether rubber, and vulcanized silicone rubber; wherein, the addition of the binder can promote the solid hydrogen storage powder to bond with the heat transfer material into a whole.

[0025] In this embodiment of the invention, the cake bed 20 further includes a heat transfer material, which includes at least one of copper, aluminum and expanded graphite.

[0026] Specifically, solid hydrogen storage powder has a low thermal conductivity, typically around 1 W / (m*K), similar to that of insulating materials. When solid hydrogen storage powder reacts with hydrogen, it undergoes 10%–25% lattice expansion upon hydrogen absorption and shrinkage upon hydrogen release. After repeated hydrogen absorption and desorption cycles, the solid hydrogen storage powder may pulverize, further reducing its thermal conductivity. This impeded heat transfer severely affects the charging and discharging performance of solid hydrogen storage devices.

[0027] Furthermore, the cake bed 20 contains highly heat-conducting materials, which can effectively improve the heat transfer performance of the solid hydrogen storage powder, thereby improving the hydrogen charging and discharging performance of the solid hydrogen storage device.

[0028] In this embodiment of the invention, the hydrogen storage powder mesh press-fit component 100 includes a first through hole 101 located in the central region of the limiting member 10 and a plurality of second through holes 102 arranged around the first through hole 101. The first through hole 101 and the second through holes 102 completely penetrate the hydrogen storage powder mesh press-fit component 100. In this configuration, the distance between each second through hole 102 and the first through hole 101 is equal, and the distance between two adjacent second through holes 102 is equal.

[0029] Specifically, the first through hole 101 is designed to allow the gas guide tube to completely penetrate the hydrogen storage powder mesh press-fit component 100, and the second through hole 102 is designed to allow the heat exchange tube 40 to completely penetrate the hydrogen storage powder mesh press-fit component 100.

[0030] Please see Figure 3 , Figure 3 A flowchart illustrating the assembly method of the hydrogen storage powder mesh press-fit component 100 provided by the present invention; wherein the method includes: S10, a compacted base plate 30 is provided, the compacted base plate 30 including a plurality of columnar protrusions 33.

[0031] Specifically, step S10 also includes: Please see Figure 4 , Figure 4 This is a schematic diagram of the structure of the compacted bottom plate 30 in the assembly method of the hydrogen storage powder grid pressing part 100 provided by the present invention; wherein, a compacted bottom plate 30 is provided, the compacted bottom plate 30 includes a bottom support plate 31 and side plates 32 located around the perimeter of the bottom support plate 31, the bottom support plate 31 and the side plates 32 are integrally formed, and the shape of the bottom support plate 31 is preferably circular.

[0032] Specifically, the compacted base plate 30 includes a plurality of columnar protrusions 33, each columnar protrusion 33 having a through hole that completely penetrates the bottom support plate 31, and at least one columnar protrusion 33 is located at the center of the bottom support plate 31.

[0033] S20, a limiting member 10 is provided and the limiting member 10 is engaged in the compacted base plate 30, and each columnar protrusion 33 penetrates the corresponding grid 11.

[0034] Specifically, step S20 also includes: First, a limiting member 10 is provided, the limiting member 10 having a plurality of square grids 11; Next, the limiting member 10 is mounted on the bottom support plate 31, and each columnar protrusion 33 penetrates the corresponding grid 11, so that the limiting member 10 is engaged in the compacted bottom plate 30, as shown. Figure 5 As shown, Figure 5 This is a schematic diagram of the structure after the compaction base plate 30 and the limiting member 10 are assembled in the assembly method of the hydrogen storage powder grid pressing part 100 provided by the present invention.

[0035] S30, the mixed powder formed by mixing solid hydrogen storage powder, heat transfer material and binder is filled into the compacted base plate 30.

[0036] Specifically, step S30 also includes: Solid hydrogen storage powder, heat transfer material with high heat transfer performance and binder are premixed in a certain proportion in a V-type mixer to form a mixed powder. The mixed powder is then filled into the compacted bottom plate 30 at a certain filling density.

[0037] Preferably, in step S30, the packing density of the mixed powder is 3–5 kg / L. A suitable packing density helps ensure the performance of the hydrogen storage material. If the packing density is too low, it may reduce the effective hydrogen storage capacity within the storage container, lowering the overall system's hydrogen storage efficiency. Within a packing density range of 3–5 kg / L, the solid hydrogen storage powder can be arranged relatively closely, ensuring sufficient hydrogen storage capacity while making the diffusion and adsorption processes of hydrogen within the powder more efficient. Simultaneously, at a packing density of 3–5 kg / L, the heat transfer material can form a relatively uniform distribution within the solid hydrogen storage powder, ensuring rapid heat transfer and preventing localized overheating or overcooling. This is crucial for maintaining the temperature stability of the hydrogen storage system, as temperature changes directly affect the hydrogen absorption and desorption performance of the storage material.

[0038] S40, apply pressure to spread and compact the mixed powder to obtain the cake bed 20; Specifically, step S40 also includes: The mixed powder is spread and compacted by applying a compressive force to obtain a cake bed 20; wherein the compressive force is 300~500MPa; within this range, the mixed powder can be fully compacted, and the gaps between particles are significantly reduced. This gives the cake bed 20 a high density and a uniform structure, which is beneficial to improving the stability and reliability of the cake bed 20.

[0039] Specifically, higher pressure helps increase the hydrogen storage density of the mixed powder. Under pressures of 300–500 MPa, the crystal structure of the hydrogen storage powder may change, making hydrogen molecules easier to adsorb and store. Simultaneously, the compacted cake bed 20 can improve the thermal conductivity of the heat transfer material within the mixed powder. Under pressures of 300–500 MPa, the contact between the heat transfer material and the hydrogen storage powder is closer, reducing thermal resistance and facilitating rapid heat transfer and uniform distribution. This is crucial for maintaining temperature stability in the hydrogen storage system and controlling the rate of hydrogen adsorption and desorption reactions.

[0040] S50, demolding process is performed on the cake bed 20 to remove the compacted bottom plate 30, finally obtaining the hydrogen storage powder grid press part 100.

[0041] Specifically, step S50 also includes: The compacted cake bed 20 is demolded to remove the compacted bottom plate 30, and finally the hydrogen storage powder grid press part 100 is obtained; wherein, the compacted cake bed 20 is integrated with the high-strength limiting member 10 to obtain the hydrogen storage powder grid press part 100.

[0042] Specifically, while adding high heat transfer materials to increase the heat transfer performance of solid hydrogen storage powder, the presence of high-strength limiting components 10 gives the entire cake bed 20 good strength, which helps to maintain its original shape during assembly and prevents collapse or cracking.

[0043] Accordingly, the present invention also provides a solid hydrogen storage device, including a hydrogen storage container having a receiving cavity, wherein a plurality of hydrogen storage powder grid pressing parts 100 as described above are disposed in the receiving cavity, or the hydrogen storage powder grid pressing parts 100 are assembled by an assembly method that provides a plurality of hydrogen storage powder grid pressing parts 100 as described above.

[0044] In this embodiment of the invention, the cavity is also provided with a heat exchange tube 40 and a gas guide tube. The heat exchange tube 40 is a U-shaped tube and is filled with water to realize heat exchange of the solid hydrogen storage device. Both ends of the U-shaped tube and the gas guide tube pass through multiple hydrogen storage powder grid pressing parts 100.

[0045] Specifically, in order to improve the heat transfer efficiency of solid hydrogen storage devices, a single external immersion water bath heat exchange method is often insufficient for hydrogen storage containers with large diameters. It is usually necessary to use an embedded heat exchange tube 40 as an auxiliary heat exchange. To simplify the external interface of the device's water circuit, the heat exchange tube 40 adopts the form of a U-shaped tube to realize the circulation of water inside the solid hydrogen storage device.

[0046] Please see Figure 6 , Figure 6 This is a schematic diagram of the structure of the hydrogen storage powder grid press 100 and the heat exchange tube 40 assembled in the solid hydrogen storage device provided by the present invention. Since the compacted base plate 30 includes multiple columnar protrusions 33, each of which has a through hole that completely penetrates the bottom support plate 31, the compacted hydrogen storage powder grid press 100 includes a first through hole 101 located in the central region of the limiting member 10 and multiple second through holes 102 arranged around the first through hole 101. Both the first through hole 101 and the second through holes 102 completely penetrate the hydrogen storage powder grid press 100. The distance between each second through hole 102 and the first through hole 101 is equal, and the distance between two adjacent second through holes 102 is equal.

[0047] Specifically, each hydrogen storage powder grid pressing component 100 can be sequentially fitted onto two heat exchange tubes 40 (U-shaped tubes) through four reserved second through holes 102; wherein, each U-shaped tube is equipped with a sliding damping device, so that each hydrogen storage powder grid pressing component 100 can slowly slide through the U-shaped tube and finally be assembled in the hydrogen storage container.

[0048] Specifically, since the cake bed 20 itself has a certain strength, it does not need to continue mechanical vibration during the filling process, nor will it fall and break due to gravitational potential energy, thus playing a protective role for the solid hydrogen storage container.

[0049] Specifically, the first through hole 101 in each hydrogen storage powder grid press 100 is used to install the gas guide pipe. This can prevent the gas guide pipe from being squeezed and broken during the filling of the hydrogen storage powder grid press 100. After all the hydrogen storage powder grid press 100 are fitted onto the U-shaped tube, the gas guide pipe is inserted through the first through hole 101.

[0050] The following detailed description of the hydrogen storage powder mesh press-fit component 100, its assembly method, and the solid hydrogen storage device is provided through specific embodiments.

[0051] Example 1: Embodiment 1 of the present invention provides an assembly method for a hydrogen storage powder mesh press-fit component 100, which specifically includes the following steps: Step (1): Mix 1200 kg of V-type solid solution hydrogen storage alloy with a particle size of 50~100 mesh, 50 kg of oxygen-free copper powder with a particle size of 50~100 mesh, 30 kg of expanded graphite and 16 kg of PTFE binder evenly, and place them in a V-type mixer for further mixing to obtain mixed powder.

[0052] Step (2): The mixed powder is filled into the compaction mold formed by the assembly of the limiting member 10 and the compaction base plate 30; wherein the diameter of the compaction mold is 500mm and the depth of the compaction mold is 14mm; the filling amount of the mixed powder is filled according to the filling density of 4.6kg / L.

[0053] Step (3): Apply a pressure of 400 MPa to spread and compact the mixed powder to obtain a cake bed 20.

[0054] Step (4): Demold the compacted cake bed 20 to remove the compacted bottom plate 30, and finally obtain the hydrogen storage powder grid press 100; wherein, the volume of a single hydrogen storage powder grid press 100 is 2.75L, and the filling amount of mixed powder is 12.63kg.

[0055] Embodiment 1 of the present invention provides a solid hydrogen storage device, including a hydrogen storage container with a receiving cavity, wherein a plurality of hydrogen storage powder mesh pressing parts 100 as described above are disposed in the receiving cavity, and the assembly process is as follows: First, 100 hydrogen storage powder grid press-fit parts 100 are sequentially inserted into two U-shaped tubes through the four pre-reserved second through holes 102. Since the U-shaped tubes are equipped with sliding damping devices, each hydrogen storage powder grid press-fit part 100 can slowly slide through the U-shaped tubes and finally be assembled in the hydrogen storage container. The diameter of the U-shaped tubes is 16 mm and the wall thickness is 1.5 mm. The inner diameter of the hydrogen storage container is 500 mm and the length is 1500 mm. The total filling amount of the mixed powder is 1263 kg.

[0056] Secondly, the hydrogen storage container was sealed and its hydrogen filling and discharging performance was measured. To verify its heat transfer performance, a high-flow-rate hydrogen discharge (45℃, 3m) was performed. 3 ( / min) and tank surface strain test.

[0057] Please see Figure 7 , Figure 7 This is a graph showing the hydrogen release curves of the solid-state hydrogen storage device provided in Embodiment 1 of the present invention under different temperatures, pressures, and hydrogen release flow rates; wherein, by Figure 7 It can be seen that during the period from 5 minutes to 70 minutes, the temperature of the solid hydrogen storage device gradually increased from 5°C to 45°C, the pressure inside the tank gradually decreased from 2.5 MPa to 0.1 MPa, and the hydrogen release flow rate remained at 3 m³ / min. 3 The flow rate remains constant, and the cumulative hydrogen release rate increases uniformly to 210 m³ / min. 3 The above results show that, at low temperatures, the hydrogen storage powder mesh press 100 exhibits good hydrogen release performance and can maintain a high hydrogen supply flow rate throughout the process.

[0058] Please see Figures 8a to 8b , Figure 8a This is a diagram showing the circumferential and axial hydrogen absorption strain curves of the hydrogen storage container at point two on the surface of the tank in the solid hydrogen storage device provided in Embodiment 1 of the present invention. Figure 8b The figure shows the circumferential and axial hydrogen absorption strain curves of the hydrogen storage container at point four on the surface of the tank in the solid hydrogen storage device provided in Embodiment 1 of the present invention. When the hydrogen storage powder mesh press 100 after mixing and pressing is in the process of releasing hydrogen, the strain rate of the hydrogen storage container at different points on the surface of the tank in the solid hydrogen storage device provided in Embodiment 1 of the present invention is 0, which indicates that there is almost no stress in the hydrogen storage container during the hydrogen release process.

[0059] Depend on Figure 8a It can be seen that when the hydrogen storage powder mesh press 100 after mixing and pressing is in the hydrogen absorption process, the strain rate of the hydrogen storage container in the solid hydrogen storage device provided in Embodiment 1 of the present invention is -0.02% to 0.01% in the circumferential direction at point 2 on the surface of the tank, and the strain rate is -0.06% to 0.01% in the axial direction at point 2 on the surface of the tank.

[0060] Depend on Figure 8bIt can be seen that when the hydrogen storage powder mesh press 100 after mixing and pressing is in the hydrogen absorption process, the strain rate of the hydrogen storage container in the solid hydrogen storage device provided in Embodiment 1 of the present invention is -0.04% to 0.05% in the circumferential direction at point four on the surface of the tank, and the strain rate is -0.19% to 0.02% in the axial direction at point four on the surface of the tank.

[0061] Specifically, the above results show that, under the premise of maintaining high volume and high hydrogen storage density, the deformation of the solid hydrogen storage device during the hydrogen absorption process is all within the elastic deformation region, which ensures the safety and reliability of the solid hydrogen storage device.

[0062] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The first through hole 101 in the hydrogen storage powder grid pressing part 100 provided by the present invention is used to install the gas guide pipe, which can prevent the gas guide pipe from being squeezed and broken during the filling of hydrogen storage powder.

[0063] (2) The hydrogen storage powder mesh pressing part 100 provided by the present invention adds high heat transfer performance materials such as copper powder and expanded graphite, which can effectively improve the heat transfer performance of solid hydrogen storage materials.

[0064] (3) The limiting member 10 in the hydrogen storage powder grid press 100 provided by the present invention is made of a lightweight magnesium alloy material with high yield strength and high thermal conductivity. It maintains a certain strength during the pressing process and divides the mixed powder into multiple tiny grids 11. This further increases the heat transfer performance of the cake bed 20 and can effectively prevent the hydrogen storage powder grid press 100 with a large diameter from collapsing during transportation and assembly. After the hydrogen storage material absorbs hydrogen and expands, the compacted solid hydrogen storage material is tightly limited by the high-strength limiting member 10 buried inside the solid hydrogen storage material. In addition, the compaction process itself gives it a macroscopic anti-deformation effect. Therefore, the deformation caused by the hydrogen absorption and expansion of the solid hydrogen storage material can be effectively eliminated for the solid hydrogen storage device.

[0065] It should be noted that all the above embodiments belong to the same inventive concept, and the descriptions of each embodiment have different focuses. Where the description in a particular embodiment is not exhaustive, please refer to the descriptions in other embodiments. The above embodiments only illustrate the implementation of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the inventive concept, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A method for assembling a hydrogen storage powder mesh press-fit component, characterized in that, The device includes a limiting member with multiple grids and a disc bed embedded in the limiting member. The disc bed includes multiple sub-discs, each of which completely fills the corresponding grid. The hydrogen storage powder grid pressing component includes a first through hole located in the central region of the limiting member and multiple second through holes arranged around the first through hole. Both the first through hole and the second through holes completely penetrate the hydrogen storage powder grid pressing component. Wherein, the distance between each second through hole and the first through hole is equal, and the distance between two adjacent second through holes is equal; The material of the cake bed includes solid hydrogen storage powder, heat transfer material and binder, wherein the heat transfer material includes at least one of copper, aluminum and expanded graphite. The method includes: S10, providing a compacted base plate, the compacted base plate including a plurality of columnar protrusions; S20, the limiting member is provided and the limiting member is engaged in the compacted base plate, each of the columnar protrusions penetrates the corresponding grid; S30, the mixed powder formed by mixing the solid hydrogen storage powder, the heat transfer material and the binder is filled into the compacted base plate; S40, apply pressure to spread and compact the mixed powder to obtain the cake bed; S50, the cake bed is demolded to remove the compacted bottom plate, and finally the hydrogen storage powder mesh press is obtained; Each hydrogen storage powder grid press-fit component is sequentially inserted into the U-shaped heat exchange tube inside the receiving cavity of the hydrogen storage container through the reserved second through hole; After all the hydrogen storage powder mesh pressing parts are fitted onto the U-shaped heat exchange tube, the gas guide tube inside the receiving cavity of the hydrogen storage container is inserted through the first through hole.

2. The assembly method of the hydrogen storage powder mesh press-fit component according to claim 1, characterized in that, In step S30, the packing density of the mixed powder is 3-5 kg / L.

3. The assembly method of the hydrogen storage powder mesh press-fit component according to claim 1, characterized in that, In step S40, the pressure is 300~500MPa.

4. The assembly method of the hydrogen storage powder mesh press-fit component according to claim 1, characterized in that, The solid hydrogen storage powder includes any one of Ti-based solid solution hydrogen storage materials, V-based solid solution hydrogen storage materials, and AB5-type solid solution hydrogen storage materials.

5. The assembly method of the hydrogen storage powder mesh press-fit component according to claim 1, characterized in that, The adhesive includes any one of polytetrafluoroethylene, fluororubber, perfluoroether rubber, and vulcanized silicone rubber.

6. The assembly method of the hydrogen storage powder mesh press-fit component according to claim 1, characterized in that, The limiting component is made of magnesium alloy.

7. A solid-state hydrogen storage device, characterized in that, The invention includes a hydrogen storage container with a receiving cavity, wherein a plurality of hydrogen storage powder grid press-fit components assembled by the assembly method of any one of claims 1 to 6 are disposed within the receiving cavity; a U-shaped heat exchange tube and a gas guide tube are provided within the receiving cavity, wherein both ends of the U-shaped heat exchange tube and the gas guide tube pass through the plurality of hydrogen storage powder grid press-fit components.

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