A system for solid hydrogen storage

Abstract

This invention discloses a system for solid hydrogen storage, comprising a hydrogen storage tank and a heat exchange medium distribution and collection tank. A central shaft is installed inside the hydrogen storage tank, and two rotating partition plates are mounted on the central shaft, dividing the tank into a hydrogen storage material storage area and a non-hydrogen storage material storage area. Within the hydrogen storage material storage area, a rotation start-point limiting block is provided on the inner wall near each rotating partition plate. The hydrogen storage material storage area is filled with solid hydrogen storage material, while the non-hydrogen storage material storage area contains elastic elements. The hydrogen storage material storage area has hydrogen storage material inlet and outlet pipes. The heat exchange medium distribution and collection tank is divided by partitions into a heat exchange medium inlet tank and a heat exchange medium outlet tank, which are connected by a U-shaped heat exchange pipe. The straight section of the U-shaped heat exchange pipe is embedded in the solid hydrogen storage material, and the top of the U-shaped heat exchange pipe passes through the gap between the top of the central shaft and the top plate of the vertical tank. This invention simultaneously solves the heat and volume compensation problems during hydrogen charging and discharging, improving the reliability of the device.

Description

Technical Field

[0001] This invention belongs to the field of hydrogen storage technology, and specifically relates to a system for solid hydrogen storage. Background Technology

[0002] Hydrogen is considered one of the cleanest and most efficient energy sources because its combustion process does not release greenhouse gases such as carbon dioxide and it has a high calorific value. The utilization of hydrogen is inseparable from its storage, which currently includes three main methods: gaseous hydrogen storage, liquid hydrogen storage, and solid-state hydrogen storage. Solid-state hydrogen storage involves storing hydrogen in the lattice of a solid hydrogen storage alloy material (such as rare earth compounds (LaNi5)), and achieving physically reversible hydrogen addition and release processes by changing the temperature and pressure under certain temperature and pressure conditions. Compared to gaseous and liquid hydrogen storage, solid-state hydrogen storage does not require excessive energy consumption and has advantages such as higher volumetric hydrogen storage density, safety and efficiency, and a stable hydrogen release rate, making it a promising hydrogen storage technology.

[0003] Solid hydrogen storage materials typically expand in volume when absorbing hydrogen and contract in volume when releasing hydrogen. Furthermore, they release a significant amount of heat during hydrogen absorption and require substantial heat replenishment during hydrogen release. Temperature also significantly impacts the hydrogen absorption and desorption rates of the storage material. Therefore, to ensure the long-term use of hydrogen storage materials and the rapid and efficient absorption and desorption of hydrogen, it is essential to simultaneously address the heat and volume changes during hydrogen absorption and desorption, designing hydrogen storage devices with high-efficiency heat exchange performance and volume compensation. Otherwise, the absorption and desorption efficiency of solid hydrogen storage will decrease, and with each hydrogen charge and discharge cycle, the expansion and compression of the solid hydrogen storage alloy will cause lattice deformation, leading to a rapid decrease in its capacity. Additionally, the expansion of the solid hydrogen storage material subjects the storage shell to significant stress, posing a risk of bulging and rupture. Solving the problems of heat absorption / desorption and volume changes during the hydrogen absorption and desorption process of solid hydrogen storage is crucial for ensuring high absorption and desorption rates and directly affects the cost and safety of the hydrogen storage device.

[0004] Patent CN117307953A discloses a hydrogen storage and release device that facilitates the replacement of hydrogen storage materials. After the hydrogen storage alloy's hydrogen charging and releasing capacity deteriorates, a new hydrogen storage alloy is injected through the jacket inlet to replace the original hydrogen storage alloy without moving the entire device. This method is convenient and low-cost. However, the volume expansion absorption of the hydrogen storage alloy during the charging and releasing process is poor, and the capacity of the solid hydrogen storage material may decay rapidly. Patent CN103883874B discloses a hydrogen storage tank with an external heat exchange structure. Its structure is simple, easy to manufacture, and low-cost. It has a better heat exchange effect and excellent hydrogen release performance. However, this hydrogen storage tank only has a heat exchange effect and cannot absorb the volume expansion of the solid hydrogen storage material during the hydrogen absorption and release process. Therefore, it cannot simultaneously solve the problems of volume expansion and heat release, and the tank body is at risk of bulging and rupture. Summary of the Invention

[0005] To address the technical problems of poor absorption efficiency due to volume expansion during hydrogen charging and discharging in existing solid hydrogen storage devices, and the inability to simultaneously solve the problems of volume expansion and heat release during absorption, this invention provides a system for solid hydrogen storage that solves the problems of volume expansion and heat release during solid hydrogen storage.

[0006] This invention provides a system for solid hydrogen storage, comprising a cylindrical vertical tank, a hydrogen storage tank and a heat exchange medium distribution and collection tank arranged coaxially with the vertical tank from top to bottom inside the vertical tank; the hydrogen storage tank is cylindrical and is a closed space enclosed by the top plate of the vertical tank, the wall of the hydrogen storage tank, and the top plate of the heat exchange medium distribution and collection tank; the heat exchange medium distribution and collection tank is cylindrical and is enclosed by the top plate of the heat exchange medium distribution and collection tank, the wall of the vertical tank, and the bottom plate of the vertical tank; a fixed cylindrical central shaft is arranged coaxially with the hydrogen storage tank inside the hydrogen storage tank and on the top plate of the heat exchange medium distribution and collection tank, with a gap maintained between the top of the central shaft and the top plate of the vertical tank;

[0007] Two rotating partition plates are arranged in a cross shape on the central axis. The two rotating partition plates are hinged and can rotate around the central axis, and can rotate towards or away from each other. They have the same height less than or equal to the height of the central axis and the same radial width equal to the inner diameter of the hydrogen storage tank. The bottom edges of the two rotating partition plates are in the same horizontal plane. The two rotating partition plates divide the hydrogen storage tank cavity into two symmetrically arranged hydrogen storage material storage areas and two non-hydrogen storage material storage areas. The hydrogen storage material storage areas are filled with solid hydrogen storage material. In the hydrogen storage material storage areas, there are rotation start limit blocks on the inner wall of the hydrogen storage tank near each rotating partition plate. In the non-hydrogen storage material storage areas, there are elastic elements between the two rotating partition plates to support the two rotating partition plates. The elastic elements undergo corresponding compression or expansion deformation as the two rotating partition plates rotate towards or away from each other.

[0008] Each vertical tank corresponding to a hydrogen storage material storage area is equipped with a hydrogen storage material inlet pipe on its top plate, and each heat exchange medium distribution and collection box corresponding to a hydrogen storage material storage area is equipped with a hydrogen storage material outlet pipe on its top plate. The hydrogen storage material outlet pipe passes through the heat exchange medium distribution and collection box and extends to the outside of the bottom plate of the vertical tank. The hydrogen storage box outside the rotating area of ​​the two rotating partition plates is equipped with a hydrogen inlet and a hydrogen outlet.

[0009] A partition is installed inside the heat exchange medium distribution and collection box along the diameter direction of the top plate of the heat exchange medium distribution and collection box. The partition divides the heat exchange medium distribution and collection box into heat exchange medium inlet box and heat exchange medium outlet box with equal volume and symmetrical arrangement. Each heat exchange medium inlet box and heat exchange medium outlet box corresponds to a hydrogen storage material storage area. U-shaped heat exchange tubes located inside the hydrogen storage box are symmetrically installed on the top plate of the heat exchange medium distribution and collection box corresponding to each hydrogen storage material storage area. The vertical section of the U-shaped heat exchange tube is buried in the solid hydrogen storage material. The top of the U-shaped heat exchange tube connecting the vertical section passes through the gap between the top of the central axis and the top plate of the vertical tank. The heat exchange medium inlet box and heat exchange medium outlet box are connected through the U-shaped heat exchange tube.

[0010] The heat exchange medium inlet box is equipped with a heat exchange medium inlet, and the heat exchange medium outlet box is equipped with a heat exchange medium outlet. The heat exchange medium inlet, heat exchange medium inlet box, U-shaped heat exchange tube, heat exchange medium outlet box and heat exchange medium outlet form a closed and connected cavity, which allows the heat exchange medium to remove heat from the solid hydrogen storage material filled in the hydrogen storage tank or to replenish heat to the solid hydrogen storage material. The hydrogen storage tank is not connected to the heat exchange medium inlet box and the heat exchange medium outlet box.

[0011] The two rotating partition plates are fitted with sleeves at their rotation axes. The height of the sleeves is less than the height of the rotating partition plates. One end of the sleeve is flush with one edge of the rotating partition plate. A rotation gap with a width equal to the outer diameter of the sleeve is maintained on the rotation axis of the rotating partition plate where no sleeve is provided. The sum of the sleeve heights of the two rotating partition plates is equal to the height of the rotating partition plates. The two rotating partition plates are interlocked in a cross shape and fitted onto the central shaft through the sleeves. A rotation seal is provided at the contact point between the rotation gap of each rotating partition plate and the outer wall of the sleeve of the other rotating partition plate. The rotation seal can be a packing seal to prevent solid hydrogen storage material from entering the non-hydrogen storage material storage area.

[0012] All elastic elements mentioned are conventional elastic elements. These can be torsion springs, sheet springs, etc. Each elastic element typically has a rotation axis and two open, angled support arms, with the rotation axis fixedly connected to the two support arms. For a torsion spring, the rotation axis is its axis; for a herringbone sheet spring, the rotation axis is the connection point of the two support arms; for a fishtail sheet spring, the rotation axis is the center line of the base of the open-top, triangular-section sheet. During initial installation, it is advisable to use a rotation starting point limiting block to maintain a certain degree of compression deformation in the elastic element. This is beneficial because when the solid hydrogen storage material releases hydrogen and its volume shrinks, ceasing to provide thrust to the rotating partition plates, the elastic element will then provide thrust to the rotating partition plates, causing them to rotate in opposite directions, returning to the state before hydrogen filling. For the elastic element, when the solid hydrogen storage material absorbs hydrogen and its volume increases, it pushes the two rotating partition plates to rotate in opposite directions, increasing the volume of the hydrogen storage cavity and compressing and deforming the elastic element, accumulating elastic potential energy inside. When the solid hydrogen storage material releases hydrogen and its volume decreases, the elastic potential energy accumulated inside the elastic element is released, pushing the two rotating partition plates to rotate in opposite directions, reducing the volume of the hydrogen storage cavity and returning it to its initial state to prepare for the next hydrogen charging and discharging process. If the hydrogen storage tank axis is relatively high, multiple elastic elements can be installed in a direction parallel to the hydrogen storage tank axis to ensure more uniform force distribution on the rotating partition plates.

[0013] There are two main ways to fix the elastic element. One way is to fix the rotation axis of the elastic element and not fix the two support arms. The other way is to fix the two support arms of the elastic element to two rotating partition plates respectively and not fix its rotation axis.

[0014] When the elastic element is a torsion spring with a certain angle between its two ends, the torsion spring can be fixed by connecting the support arms at both ends of the spring to two rotating partition plates respectively, or by setting a cylindrical spring shaft above the top plate of the heat exchange medium distribution and collection box and fixing the torsion spring on the spring shaft.

[0015] When the elastic element is a spring sheet, it can be an elastic element with a certain curvature. It can also be a fishtail-type spring sheet, which is a combination of a triangular spring sheet and a push rod. The push rod is also the support arm. The triangular spring sheet has a triangular structure with a broken upper part and a connected lower part. The push rod is set on the outside of the triangular spring sheet. One end of the push rod is fixedly connected to the small end of the triangle, and the other end extends out of the large end of the triangular spring sheet and is fixedly connected to two rotating partition plates. When the solid hydrogen storage material absorbs hydrogen and its volume increases, it pushes the two rotating partition plates to rotate in opposite directions, increasing the volume of the hydrogen storage cavity. This causes the distance between the two push rods to decrease, and the levers themselves cause the small end of the upper triangle of the fishtail to increase, accumulating elastic potential energy inside the spring sheet. When the solid hydrogen storage material releases hydrogen and its volume decreases, the elastic potential energy accumulated inside the spring sheet is released, pushing the two rotating partition plates to rotate in opposite directions, reducing the volume of the hydrogen storage cavity and returning it to its initial state to prepare for the next hydrogen charging and discharging process.

[0016] The U-shaped heat exchange tubes are arranged in a ring, equilateral triangle, or regular quadrilateral pattern within the cross-section of the hydrogen storage material storage area to ensure that heat can be uniformly dissipated or replenished throughout the hydrogen storage tank. The U-shaped heat exchange tubes are preferably circular, with an outer diameter of 19–80 mm. When the U-shaped heat exchange tubes are evenly distributed in a ring, the circumferential spacing between the U-shaped heat exchange tubes should be 30–100 mm, and the radial spacing should be 40–150 mm. When the U-shaped heat exchange tubes are evenly distributed in an equilateral triangle pattern, the side length of the equilateral triangle should be 25–150 mm; when the U-shaped heat exchange tubes are evenly distributed in a regular quadrilateral pattern, the side length of the regular quadrilateral should be 30–150 mm.

[0017] Each rotating partition plate and its sleeve can be integrally formed, or they can be sealed together by bolting, bonding, welding or other fixing methods, so that the rotating partition plate and the sleeve can rotate together around the central axis.

[0018] To prevent hydrogen storage materials from mixing in the hydrogen storage area and the non-hydrogen storage area, and to prevent wear of the solid hydrogen storage material at points of relative movement caused by rotation, while also reducing friction, a rotation seal is installed at the contact points between each rotating partition plate and the inner wall of the hydrogen storage tank, as well as at the contact points with the upper part of the top plate of the heat exchange medium distribution and collection tank. The rotation seal can be achieved by means of packing seal or other methods.

[0019] Each hydrogen storage material storage area is equipped with a hydrogen storage material inlet pipe and a hydrogen storage material outlet pipe, through which hydrogen storage material is added to and removed from the storage area. To maximize the utilization of the cavity volume of the system used for solid hydrogen storage, the volume of the hydrogen storage material storage area should be large, while the volume of the non-hydrogen storage material storage area should be small. The volume of the hydrogen storage material storage area should preferably be 2 to 6 times the volume of the non-hydrogen storage material storage area.

[0020] To ensure that each rotating partition plate rotates within a certain area and protects the internal components in the hydrogen storage material area, a rotation endpoint limit block corresponding to each rotating partition plate is installed on the inner wall of the hydrogen storage tank within a certain range near the rotation start limit block corresponding to each rotating partition plate in the non-hydrogen storage material area. This ensures that each rotating partition plate can only rotate within the angle corresponding to its corresponding rotation start limit block and rotation endpoint limit block.

[0021] Because the tops of the hydrogen storage material storage area and the non-hydrogen storage material storage area are connected, hydrogen can enter the hydrogen storage material storage area from the non-hydrogen storage material storage area. As a preferred embodiment, to accelerate the flow of hydrogen to the hydrogen storage material storage area, connecting holes can be opened on both rotating partition plates to allow hydrogen to flow between the non-hydrogen storage material storage area and the hydrogen storage material storage area. The connecting holes are arranged in a ring, equilateral triangle, or regular quadrilateral on the rotating partition plate. The connecting holes are preferably circular, with a diameter smaller than the minimum particle size of the solid hydrogen storage material. When the connecting holes are evenly distributed in a ring, the circumferential spacing between the holes is preferably 20-80 mm, and the radial spacing is preferably 40-60 mm. When the connecting holes are evenly distributed in an equilateral triangle, the side length of the equilateral triangle is preferably 20-60 mm; when the connecting holes are evenly distributed in a regular quadrilateral, the side length of the regular quadrilateral is preferably 20-50 mm.

[0022] In theory, the hydrogen inlet and outlet can be located anywhere on the wall of the hydrogen storage tank. However, to minimize wear on the hydrogen storage material, the hydrogen inlet and outlet should not be located within the area where the two rotating partition plates rotate. If the hydrogen inlet and outlet are located on the wall corresponding to the hydrogen storage area, a filter screen should be installed inside the opening to prevent solid hydrogen storage material from entering and clogging the openings. The filter screen can be one or more layers, and the opening diameter should be smaller than the minimum particle size of the solid hydrogen storage material, preferably less than 40% of the minimum particle size. Two or more hydrogen inlets and outlets can be provided to increase the charging and discharging speed. Alternatively, the hydrogen inlet and outlet can be combined into one, with only one hydrogen inlet and outlet serving as both.

[0023] As a preferred option, a filter screen such as a wire mesh can be installed on the connecting holes to prevent fine, broken solid hydrogen storage material particles from entering the non-hydrogen storage material storage area through the connecting holes. The pore size of the filter screen is smaller than the particle size of the solid hydrogen storage material, preferably 10% to 30% of the minimum particle size of the solid hydrogen storage material. To reduce potential damage to the filter screen caused by the addition and removal of solid hydrogen storage material, the filter screen should preferably be installed on one side of the rotating partition plate located within the non-hydrogen storage material storage area.

[0024] As an alternative, the two rotating partition plates can also be made of triangular or V-shaped screens. These screens simultaneously act as a barrier for the solid hydrogen storage material and facilitate the flow and distribution of hydrogen. V-shaped screens offer advantages such as good rigidity, simple structure, and ease of manufacturing. The cross-section of the V-shaped screen is V-shaped or triangular, with wedge-shaped gaps. The narrowest point of the wedge-shaped gap contacts the solid hydrogen storage material, ensuring that the internal solid hydrogen storage material does not leak out. Hydrogen can pass through the wedge-shaped gap and contact the solid hydrogen storage material with a larger surface area. The narrowest point of the wedge-shaped gap is smaller than the minimum particle size of the solid hydrogen storage material, preferably 30% to 80% of the minimum particle size.

[0025] When loading solid hydrogen storage material, the outlet pipe is closed and the inlet pipe is open. Under gravity, the hydrogen storage material enters from the inlet pipe and is stored in the storage area of ​​the hydrogen storage tank. When the hydrogen storage material needs replacement due to its lifespan decline, the outlet pipe is opened, and under gravity, the hydrogen storage material in the storage area exits the hydrogen storage device through the outlet pipe. The inlet and outlet pipes should preferably be cylindrical with a diameter of 50–400 mm.

[0026] Depending on the different needs of hydrogen filling and discharging, during hydrogen filling, a low-temperature heat exchange medium enters the heat exchange medium inlet box from the heat exchange medium inlet. Through the distribution function of the heat exchange medium inlet box, it enters the U-shaped heat exchange tubes, absorbing the heat released by the solid hydrogen storage material in the hydrogen storage area due to hydrogen absorption. This heat is then collected in the heat exchange medium outlet box and leaves the hydrogen storage device through the heat exchange medium outlet, thus lowering the temperature of the solid hydrogen storage material. When hydrogen needs to be released from the solid hydrogen storage material, a high-temperature heat exchange medium enters the heat exchange medium inlet box from the heat exchange medium inlet. Through the distribution function of the heat exchange medium inlet box, it enters the U-shaped heat exchange tubes, providing heat to the solid hydrogen storage material in the hydrogen storage tank. The solid hydrogen storage material absorbs heat and releases hydrogen. The heat exchange medium, after releasing heat, collects in the heat exchange medium outlet box and leaves the hydrogen storage device through the heat exchange medium outlet. By using the heat exchange medium to remove heat from the hydrogen storage area or replenish heat to the hydrogen storage area, the hydrogen absorption and release process is ensured to proceed at a high rate. Fluids such as water, nitrogen, and air can be used as the heat exchange medium.

[0027] As a preferred solution, to ensure that all solid hydrogen storage material is filled within the hydrogen storage area and to prevent the solid hydrogen storage material from expanding and clogging the outlet pipe during hydrogen filling, a plug can be installed inside the outlet pipe. The plug consists of a baffle, a packing seal, a baffle cylinder, a handle, and an installation ring. The baffle cylinder is a cylindrical tube with an outer diameter smaller than the inner diameter of the outlet pipe, typically 4-10 mm smaller. One end of the baffle cylinder is closed by the baffle, while the other end is open, with the baffle end inserted into the outlet pipe to prevent solid hydrogen storage material from entering the outlet pipe during non-discharge operations. A handle, which can be made of round steel or angle steel, is provided at the open end for easy installation and removal of the plug. The gap between the outlet pipe of the hydrogen storage material and the outlet pipe of the hydrogen storage material is sealed with filler such as ceramic fiber rope to prevent solid hydrogen storage material from entering the gap between them. The diameter of the ceramic fiber rope should be 5-11 mm. To ensure that the outlet pipe plug of the hydrogen storage material is fixed inside the outlet pipe of the hydrogen storage material, an installation ring is set at the open end. The installation ring is a circular ring that is fitted over the baffle. A circular hole is made on the installation ring, and a threaded hole is made at the same position on the outlet pipe of the hydrogen storage material so that the installation ring can be fixed to the outlet pipe of the hydrogen storage material with screws.

[0028] As a preferred solution, to avoid problems such as caking or poor flowability of solid hydrogen storage materials in the hydrogen storage tank, which can lead to difficulties in unloading, a loosening air inlet can be installed on the wall of the hydrogen storage tank corresponding to the hydrogen storage material storage area. During the unloading process of solid hydrogen storage materials, inert gases such as high-pressure nitrogen and carbon dioxide can be introduced to facilitate the smoother discharge of solid hydrogen storage materials.

[0029] When filling the hydrogen storage system with solid hydrogen storage material, open the hydrogen storage material inlet pipe and close the hydrogen storage material outlet pipe to fill the hydrogen storage material storage area in the hydrogen storage tank. Keep both the hydrogen storage material inlet and outlet pipes closed during the charging and discharging process. When unloading the solid hydrogen storage material, open the hydrogen storage material outlet pipe to unload the solid hydrogen storage material from the hydrogen storage area in the hydrogen storage tank. When unloading the solid hydrogen storage material, the hydrogen storage material inlet pipe can also be opened as a vent. The purpose of opening the inlet pipe is to maintain pressure balance in the hydrogen storage tank and prevent negative pressure from forming inside the tank during rapid unloading of the solid hydrogen storage material, which would make it difficult to unload the solid hydrogen storage material or cause the tank to collapse due to negative pressure. If the solid hydrogen storage material has poor flowability and cannot be unloaded due to caking, compression, or other reasons, the loosening air inlet can be opened and inert gases such as nitrogen can be introduced to loosen the solid hydrogen storage material, allowing it to be unloaded from the hydrogen storage tank more smoothly.

[0030] This system for solid hydrogen storage operates by opening the hydrogen inlet and closing the hydrogen outlet, hydrogen storage material inlet pipe, and hydrogen storage material outlet pipe during hydrogen filling, creating a sealed cavity within the hydrogen storage tank that allows only inflow and no outflow. Hydrogen enters the storage tank through the hydrogen inlet and then flows into the hydrogen storage material storage area. Under pressure, hydrogen is stored in the solid hydrogen storage material in the hydrogen storage tank. During the hydrogen filling process, the volume of the solid hydrogen storage material increases, and the two rotating partition plates rotate towards the non-hydrogen storage material storage area. The volume of the hydrogen storage material storage area increases, compensating for the increase in the volume of the solid hydrogen storage material. The compression between the solid hydrogen storage materials decreases, and the hydrogen storage tank avoids the risk of bulging. During this process, the elastic element is compressed, and the elastic potential energy increases. Since the solid hydrogen storage material releases heat during the absorption of hydrogen, the temperature inside the hydrogen storage tank rises after the heat released during hydrogen filling reaches a certain level. At this time, a low-temperature medium is introduced into the heat exchange medium inlet box from the heat exchange medium inlet box. Through the distribution action of the heat exchange medium inlet box, it enters the U-shaped heat exchange tube connected to the heat exchange medium inlet box. Through the heat transfer action of the U-shaped heat exchange tube, the heat released by the solid hydrogen storage material in the hydrogen storage tank due to the absorption of hydrogen is absorbed and collected in the heat exchange medium outlet box, and then leaves the hydrogen storage device through the heat exchange medium outlet. The temperature of the solid hydrogen storage material in the hydrogen storage tank is reduced, allowing the hydrogen filling to proceed at a higher rate.

[0031] This system for solid hydrogen storage opens the hydrogen outlet and closes the hydrogen inlet, hydrogen storage material inlet pipe, and hydrogen storage material outlet pipe during hydrogen release. This creates a sealed cavity within the storage tank, preventing entry and allowing only exit. Hydrogen is released from the solid hydrogen storage material and fills the non-hydrogen storage material storage area. Once a certain pressure is established, the hydrogen leaves the storage device through the outlet, supplying downstream devices or external equipment. After releasing hydrogen, the solid hydrogen storage material decreases in volume, and the elastic potential energy stored in the elastic element is gradually released. This pushes two rotating partition plates to rotate in opposite directions towards the hydrogen storage material storage area. The elastic element gradually releases its elastic potential energy, further reducing the volume of the hydrogen storage material storage area, allowing the rotating partition plates to return to their pre-filling state to prepare for the next hydrogen filling and releasing process. Since solid hydrogen storage materials need to absorb heat to release the hydrogen stored inside, the high-temperature heat exchange medium enters the heat exchange medium inlet box through the heat exchange medium inlet and then enters the U-shaped heat exchange tube connected to the heat exchange medium inlet box through the distribution function of the heat exchange medium inlet box. Through the heat transfer function of the U-shaped heat exchange tube, the heat required for the solid hydrogen storage material to release hydrogen in the hydrogen storage tank is input and collected in the heat exchange medium outlet box, and then leaves the hydrogen storage device through the heat exchange medium outlet, so that the hydrogen release can be carried out at a high rate.

[0032] The same medium can be used during hydrogen charging and discharging. By setting up external heaters or coolers, the heat exchange medium is cooled during hydrogen charging and heated during hydrogen discharging, so as to achieve the purpose of recycling.

[0033] The present invention has the following beneficial effects:

[0034] 1) By storing hydrogen in solid hydrogen storage materials, there is no need for harsh conditions such as high pressure or low temperature. The hydrogen storage process does not require excessive energy consumption, and it is safe, efficient and has a stable hydrogen release rate.

[0035] 2) By setting up rotating elements and heat exchange elements, the heat and volume compensation problems in the hydrogen charging and discharging process are solved at the same time, so that the hydrogen charging and discharging can be carried out at a higher rate; the rotating elements allow the storage area of ​​the solid hydrogen storage material to increase or decrease with the change in the volume of the solid hydrogen storage material during the hydrogen charging and discharging process, so that the mutual expansion and compression of the solid hydrogen storage material is less, and the internal lattice of the solid hydrogen storage alloy material can still maintain a good morphology after more hydrogen charging and discharging cycles, resulting in slower decay of hydrogen storage capacity and longer life of solid hydrogen storage material.

[0036] 3) By rotating the element, the volume of the hydrogen storage area can be changed, which greatly reduces the stress applied to the hydrogen storage shell caused by volume expansion, avoids the risk of bulging and cracking of the solid hydrogen storage shell, and improves the safety and reliability of solid hydrogen storage and reduces the cost of solid hydrogen storage by setting a limiting device. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of a system for solid hydrogen storage according to the present invention;

[0038] Figure 2 yes Figure 1 A top view of the structure along the AA direction;

[0039] Figure 3 yes Figure 1 A top view of the structure in the middle BB direction;

[0040] Figure 4 yes Figure 1 A top-view structural diagram along the CC axis;

[0041] Figure 5 This is a top view of the structure of the first rotating partition plate;

[0042] Figure 6 This is a schematic diagram of the main structure of the first rotating partition plate;

[0043] Figure 7 This is a top view of the second rotating partition plate.

[0044] Figure 8 This is a schematic diagram of the main structure of the second rotating partition plate;

[0045] Figure 9 This is a schematic diagram of the structure of a torsion spring, one of the elastic elements.

[0046] Figure 10This is a schematic diagram of the structure of a fishtail spring, one of the elastic elements.

[0047] Figure 11 yes Figure 1 A schematic diagram of a structure for plugging the outlet of hydrogen storage materials.

[0048] In the diagram: 1-Vertical tank, 2-Hydrogen storage tank, 3-U-shaped heat exchange tube, 4-Hydrogen inlet, 5-Solid hydrogen storage material, 6-Central shaft, 7-Second sleeve, 8-Hydrogen outlet, 9-Loosening air inlet, 10-Heat exchange medium inlet box, 11-Hydrogen storage material outlet pipe, 12-Hydrogen storage material outlet plug, 13-Heat exchange medium inlet, 14-Baffle plate, 15-Heat exchange medium outlet, 16-Hydrogen storage material outlet pipe, 17-Hydrogen storage material outlet plug, 18-Heat exchange medium outlet box, 19-Top plate of heat exchange medium distribution and collection box, 20-Loosening air inlet, 21-Hydrogen outlet, 22-Hydrogen inlet, 23-Hydrogen storage material 24-Hydrogen storage material inlet pipe, 25-Second rotating partition plate, 26-Non-hydrogen storage material storage area, 27-First rotation end point limit block, 28-Packing seal, 29-First rotation start point limit block, 30-First rotating partition plate, 31-Hydrogen storage material storage area, 32-Elastic element, 33-Support arm, 34-Triangular spring, 35-Support arm, 36-Baffle, 37-Packing seal, 38-Baffle cylinder, 39-Handle, 40-Mounting ring, 41-First sleeve, 42-Second rotation start point limit block, 43-Second rotation end point limit block, 44-Packing seal, 45-Packing seal. Detailed Implementation

[0049] The present invention will now be described in detail with reference to the accompanying drawings.

[0050] like Figures 1-4 As shown, the system for solid hydrogen storage provided by the present invention includes a cylindrical vertical tank 1, a hydrogen storage tank 2 and a heat exchange medium distribution and collection tank arranged coaxially with the vertical tank 1 from top to bottom inside the vertical tank 1; the hydrogen storage tank 2 is cylindrical and is a closed space enclosed by the top plate of the vertical tank 1, the cylindrical wall of the hydrogen storage tank 2 and the top plate 19 of the heat exchange medium distribution and collection tank; the heat exchange medium distribution and collection tank is enclosed by the top plate 19 of the heat exchange medium distribution and collection tank and the bottom end cap of the vertical tank, the bottom end cap of the vertical tank being equivalent to the combination of the cylindrical wall and the bottom plate of the vertical tank; a fixed cylindrical central shaft 6 is arranged coaxially with the hydrogen storage tank 2 on the top plate 19 of the heat exchange medium distribution and collection tank, and a gap is maintained between the top of the central shaft 6 and the top plate of the vertical tank 1.

[0051] A first rotating partition plate 30 and a second rotating partition plate 25 are arranged in a cross shape on the central shaft 6. A first sleeve 41 is provided at the rotation axis of the first rotating partition plate 30, and a second sleeve 7 is provided at the rotation axis of the second rotating partition plate 25. The first sleeve 41 and the second sleeve 7 are of equal height, each being half the height of the rotating partition plate. One end of each sleeve is flush with one edge of the corresponding rotating partition plate. A rotational clearance with a width equal to the outer diameter of the sleeve is reserved at the point on the rotation axis of each rotating partition plate where no sleeve is provided (see...). Figures 5-8 The first rotating partition plate 30 and the second rotating partition plate 25 are interlocked in a cross shape and are respectively fitted onto the central shaft 6 through the first sleeve 41 and the second sleeve 7. The first sleeve 41 is located at the lower part of the central shaft 6, and the second sleeve 7 is located at the upper part of the central shaft 6. A packing seal 44 is provided at the contact point between the rotation gap of the first rotating partition plate 30 and the outer wall of the second sleeve 7 of the second rotating partition plate 25 (see...). Figure 3 A packing seal 45 is provided at the contact point between the rotational clearance of the second rotating partition plate 25 and the outer wall of the first sleeve 41 of the first rotating partition plate 30 (see...). Figure 4 The first rotating partition plate 30 and the second rotating partition plate 25 are provided with a packing seal 28 at the contact point with the inner wall of the hydrogen storage tank 2. The first rotating partition plate 30 and the second rotating partition plate 25 divide the hydrogen storage tank 2 cavity into two symmetrically arranged hydrogen storage material storage areas 31 and two non-hydrogen storage material storage areas 26. The hydrogen storage material storage area 31 is filled with solid hydrogen storage material 5. The inner wall of the hydrogen storage tank 2 near the first rotating partition plate 30 in the hydrogen storage material storage area 31 is provided with a first rotation start limit block 29. The inner wall of the hydrogen storage tank 2 in the non-hydrogen storage material storage area 26 is provided with a first rotation end limit block 27 within a certain range near the first rotation start limit block 29. The inner wall of the hydrogen storage tank 2 near the second rotating partition plate 25 in the hydrogen storage material storage area 31 is provided with a second rotation start limit block 42. The inner wall of the hydrogen storage tank 2 in the non-hydrogen storage material storage area 26 is provided with a second rotation end limit block 43 within a certain range near the second rotation start limit block 42. Within the non-hydrogen storage material storage area 26, an elastic element 32 is provided between the first rotating partition plate 30 and the second rotating partition plate 25 to support the first rotating partition plate 30 and the second rotating partition plate 25. The elastic element 32 undergoes corresponding compression or stretching deformation as the first rotating partition plate 30 and the second rotating partition plate 25 rotate toward or away from each other. The elastic element 32 is fixedly connected to the first rotating partition plate 30 and the second rotating partition plate 25 respectively through its two support arms.

[0052] The top plates of the vertical tanks 1 corresponding to the two hydrogen storage material storage areas 31 are respectively provided with hydrogen storage material inlet pipes 23 and 24. The top plates 19 of the heat exchange medium distribution and collection boxes corresponding to the two hydrogen storage material storage areas 31 are respectively provided with hydrogen storage material outlet pipes 16 and 11. The hydrogen storage material outlet pipes 16 and 11 extend through the heat exchange medium distribution and collection box to the outside of the bottom plate of the vertical tank 1. The hydrogen storage material inlet pipe 23 and the hydrogen storage material outlet pipe 16 correspond to each other, and the hydrogen storage material inlet pipe 24 and the hydrogen storage material outlet pipe 11 correspond to each other. The hydrogen storage material outlet pipe 16 is provided with a hydrogen storage material outlet plug 17, and the hydrogen storage material outlet pipe 11 is provided with a hydrogen storage material outlet plug 12. Each hydrogen storage tank wall where the hydrogen storage material storage area 31 is located is provided with a hydrogen inlet and a hydrogen outlet, wherein the hydrogen inlet 4 and the hydrogen outlet 8 correspond to each other, and the hydrogen inlet 22 and the hydrogen outlet 21 correspond to each other. The lower part of the wall of the hydrogen storage tank where the two hydrogen storage material storage areas 31 are located is provided with loosening air inlet 9 and loosening air inlet 20, respectively.

[0053] A partition 14 is installed along the diameter of the top plate 19 of the heat exchange medium distribution and collection box. The partition 14 divides the heat exchange medium distribution and collection box into a symmetrical heat exchange medium inlet box 10 and a heat exchange medium outlet box 18. Each heat exchange medium inlet box 10 and heat exchange medium outlet box 18 corresponds to a hydrogen storage material storage area 31. U-shaped heat exchange tubes 3 are symmetrically arranged on the top plate 19 of the heat exchange medium distribution and collection box corresponding to each hydrogen storage material storage area 31, located inside the hydrogen storage tank 2. The vertical section of the U-shaped heat exchange tube 3 is buried in the solid hydrogen storage material 5. The top of the U-shaped heat exchange tube 3 is connected to the top plate of the vertical tank 1 from the top of the central axis 6. The heat exchange medium inlet box 10 and the heat exchange medium outlet box 18 are connected by a U-shaped heat exchange tube 3 through the gap between them; the heat exchange medium inlet box 10 is provided with a heat exchange medium inlet 13, and the heat exchange medium outlet box 18 is provided with a heat exchange medium outlet 15; the heat exchange medium inlet 13, the heat exchange medium inlet box 10, the U-shaped heat exchange tube 3, the heat exchange medium outlet box 18 and the heat exchange medium outlet 15 form a closed and connected cavity, which allows the heat exchange medium to remove heat from the solid hydrogen storage material 5 filled in the hydrogen storage material storage area 31 or to replenish heat to the solid hydrogen storage material 5; the hydrogen storage box 2 is not connected to either the heat exchange medium inlet box 10 or the heat exchange medium outlet box 18.

[0054] Figures 5-6 A structural schematic diagram of the first rotating partition plate 30 is given.

[0055] Figures 7-8 A schematic diagram of the second rotating partition plate 25 is given.

[0056] Figure 9 This is a schematic diagram of the structure of a torsion spring, one of the elastic elements. It has two support arms 33, and its rotation axis is the axis of the torsion spring body.

[0057] Figure 10 This is a schematic diagram of the structure of a fishtail spring, one of the elastic elements. It consists of a triangular spring 34 and two support arms 35, and its rotation axis is the center line of the bottom edge of the triangular spring with an opening at the top.

[0058] Figure 11 yes Figure 1 A schematic diagram of a structure for plugging the outlet of hydrogen storage materials. As shown in the figure, the hydrogen storage material outlet plug includes a baffle 36, a packing seal 37, a baffle cylinder 38, a handle 39, and an installation ring 40. The baffle cylinder 38 is a cylinder with an outer diameter smaller than the inner diameter of the hydrogen storage material outlet pipe 11, typically 4-10 mm smaller. One end of the baffle cylinder 38 is closed by the baffle 36, while the other end is open. The baffle end is inserted into the hydrogen storage material outlet pipe 11 to prevent solid hydrogen storage material from entering the outlet pipe 11 when not unloading. A handle 39 is provided at the open end of the baffle cylinder 38. The handle 39 can be made of round steel or angle steel, etc. The gap between the hydrogen storage material outlet pipe 11 and the hydrogen storage material outlet plug is filled with a packing seal 37, such as a ceramic fiber rope. The diameter of the ceramic fiber rope should preferably be 5-11 mm. The installation ring 40 is a circular ring that fits over the baffle cylinder 38. A circular hole is made on the installation ring 40, and a threaded hole is made at the same position on the hydrogen storage material outlet pipe 11 so that the installation ring 40 can be fixed to the hydrogen storage material outlet pipe 11 with screws.

[0059] The operation process of the present invention will be described below with reference to the accompanying drawings:

[0060] 1) Loading and unloading of solid hydrogen storage materials

[0061] Close the hydrogen storage material outlet pipes 11 and 16, and open the hydrogen storage material inlet pipes 24 and 23. Under gravity, the solid hydrogen storage material 5 enters the hydrogen storage tank 2 through the inlet pipes 24 and 23. When the solid hydrogen storage material 5 needs replacement due to its declining lifespan, open the hydrogen storage material outlet pipes 11 and 16. Under gravity, the solid hydrogen storage material 5 in the hydrogen storage tank 2 leaves the hydrogen storage device through the outlet pipes 11 and 16. If the solid hydrogen storage material 5 has poor flowability and cannot be discharged due to caking, compression, or other reasons, the loosening air inlets 9 and 20 can be opened and inert gases such as nitrogen can be introduced to loosen the solid hydrogen storage material 5, allowing it to be discharged more smoothly from the hydrogen storage tank 2.

[0062] 2) Hydrogen charging of solid hydrogen storage materials

[0063] Simultaneously close hydrogen outlets 8 and 21, hydrogen storage material inlet pipes 24 and 23, hydrogen storage material outlet pipes 11 and 16, and loosening air inlets 9 and 20, and open hydrogen inlets 4 and 22. Hydrogen enters the hydrogen storage tank 2 through hydrogen inlets 4 and 22 and is absorbed and stored by the solid hydrogen storage material 5. During the hydrogen charging process, the low-temperature heat exchange medium enters the heat exchange medium inlet box 10 from the heat exchange medium inlet 13, and enters the U-shaped heat exchange tube 3 through the distribution action of the heat exchange medium inlet box 10. After absorbing the heat released by the solid hydrogen storage material 5 in the hydrogen storage tank 2 due to the absorption of hydrogen, it is collected in the heat exchange medium outlet box 18 and leaves the hydrogen storage device through the heat exchange medium outlet 15. During the hydrogen charging process, the volume of the solid hydrogen storage material 5 increases, causing the first rotating partition plate 30 and the second rotating partition plate 25 to rotate in opposite directions toward the non-hydrogen storage material storage area 26. The elastic element 32 undergoes compression deformation, and the volume of the hydrogen storage material storage area 31 increases, compensating for the increase in the volume of the solid hydrogen storage material 5. The hydrogen storage tank 2 avoids the risk of bulging.

[0064] 3) Hydrogen release from solid hydrogen storage materials

[0065] Simultaneously close hydrogen inlets 4 and 22, hydrogen storage material inlet pipes 24 and 23, hydrogen storage material outlet pipes 11 and 16, and loosening air inlets 9 and 20, and open hydrogen outlets 8 and 21. The high-temperature heat exchange medium enters the heat exchange medium inlet box 10 from heat exchange medium inlet 13, and through the distribution function of the heat exchange medium inlet box 10, enters the U-shaped heat exchange tube 3, providing heat to the solid hydrogen storage material 5 in the hydrogen storage tank 2. The solid hydrogen storage material 5 absorbs heat and releases hydrogen gas, which leaves the hydrogen storage device through hydrogen outlets 8 and 21. The heat exchange medium, after releasing heat, collects in the heat exchange medium outlet box 18 and leaves the hydrogen storage device through heat exchange medium outlet 15. The heat exchange medium can be water, nitrogen, air, or other fluids. After the solid hydrogen storage material 5 releases hydrogen, its volume decreases. The elastic element 32 expands and deforms under the action of elastic force, pushing the first rotating partition plate 30 and the second rotating partition plate 25 to rotate in opposite directions toward the hydrogen storage material storage area 31, so that the hydrogen storage material storage area 31 can be restored to its state before being filled with hydrogen as much as possible.

Claims

1. A system for solid hydrogen storage, characterized in that: It includes a cylindrical vertical tank, a hydrogen storage tank and a heat exchange medium distribution and collection tank arranged coaxially with the vertical tank from top to bottom inside the vertical tank; the hydrogen storage tank is cylindrical and is a closed space enclosed by the top plate of the vertical tank, the wall of the hydrogen storage tank and the top plate of the heat exchange medium distribution and collection tank; the heat exchange medium distribution and collection tank is cylindrical and is enclosed by the top plate of the heat exchange medium distribution and collection tank, the wall of the vertical tank and the bottom plate of the vertical tank; a fixed cylindrical central axis is arranged coaxially with the hydrogen storage tank on the top plate of the heat exchange medium distribution and collection tank inside the hydrogen storage tank, and a gap is maintained between the top of the central axis and the top plate of the vertical tank; Two rotating partition plates are arranged in a cross shape on the central axis. The two rotating partition plates are hinged and can rotate around the central axis, and can rotate towards or away from each other. They have the same height less than or equal to the height of the central axis and the same radial width equal to the inner diameter of the hydrogen storage tank. The bottom edges of the two rotating partition plates are in the same horizontal plane. The two rotating partition plates divide the hydrogen storage tank cavity into two symmetrically arranged hydrogen storage material storage areas and two non-hydrogen storage material storage areas. The hydrogen storage material storage areas are filled with solid hydrogen storage material. In the hydrogen storage material storage areas, there are rotation start limit blocks on the inner wall of the hydrogen storage tank near each rotating partition plate. In the non-hydrogen storage material storage areas, there are elastic elements between the two rotating partition plates to support the two rotating partition plates. The elastic elements undergo corresponding compression or expansion deformation as the two rotating partition plates rotate towards or away from each other. Each vertical tank corresponding to a hydrogen storage material storage area is equipped with a hydrogen storage material inlet pipe on its top plate, and each heat exchange medium distribution and collection box corresponding to a hydrogen storage material storage area is equipped with a hydrogen storage material outlet pipe on its top plate. The hydrogen storage material outlet pipe passes through the heat exchange medium distribution and collection box and extends to the outside of the bottom plate of the vertical tank. The hydrogen storage box outside the rotating area of ​​the two rotating partition plates is equipped with a hydrogen inlet and a hydrogen outlet. A partition is installed inside the heat exchange medium distribution and collection box along the diameter direction of the top plate of the heat exchange medium distribution and collection box. The partition divides the heat exchange medium distribution and collection box into heat exchange medium inlet box and heat exchange medium outlet box with equal volume and symmetrical arrangement. Each heat exchange medium inlet box and heat exchange medium outlet box corresponds to a hydrogen storage material storage area. U-shaped heat exchange tubes located inside the hydrogen storage box are symmetrically installed on the top plate of the heat exchange medium distribution and collection box corresponding to each hydrogen storage material storage area. The vertical section of the U-shaped heat exchange tube is buried in the solid hydrogen storage material. The top of the U-shaped heat exchange tube connecting the vertical section passes through the gap between the top of the central axis and the top plate of the vertical tank. The heat exchange medium inlet box and heat exchange medium outlet box are connected through the U-shaped heat exchange tube. The heat exchange medium inlet box is equipped with a heat exchange medium inlet, and the heat exchange medium outlet box is equipped with a heat exchange medium outlet. The heat exchange medium inlet, heat exchange medium inlet box, U-shaped heat exchange tube, heat exchange medium outlet box and heat exchange medium outlet form a closed and connected cavity, which allows the heat exchange medium to remove heat from the solid hydrogen storage material filled in the hydrogen storage tank or to replenish heat to the solid hydrogen storage material. The hydrogen storage tank is not connected to the heat exchange medium inlet box and the heat exchange medium outlet box.

2. The system for solid hydrogen storage according to claim 1, characterized in that: The outlet pipe of the hydrogen storage material is equipped with a hydrogen storage material outlet plug.

3. The system for solid hydrogen storage according to claim 2, characterized in that: The hydrogen storage material outlet plug includes a baffle, a packing seal, a baffle cylinder, and a handle. The baffle cylinder is a cylindrical tube with an outer diameter smaller than the inner diameter of the hydrogen storage material outlet pipe. One end of the baffle cylinder is closed with a baffle, and the other end is open. The baffle end is inserted into the hydrogen storage material outlet pipe to prevent solid hydrogen storage material from entering the outlet pipe when not unloading. A handle, made of round steel or angle steel, is provided at the open end for installing and removing the hydrogen storage material outlet plug. A packing seal is installed in the gap between the hydrogen storage material outlet pipe and the hydrogen storage material outlet plug to prevent solid hydrogen storage material from entering the gap between them.

4. The system for solid hydrogen storage according to claim 3, characterized in that: The baffle is provided with a mounting ring at the open end. The mounting ring is a circular ring that is fitted over the baffle. A circular hole is made on the mounting ring, and a threaded hole is made at the same position on the hydrogen storage material outlet pipe so that the mounting ring can be fixed to the hydrogen storage material outlet pipe with screws.

5. The system for solid hydrogen storage according to claim 1, characterized in that: The two rotating partition plates are fitted with sleeves at their rotation axes. The height of the sleeves is less than the height of the rotating partition plates. One end of the sleeve is flush with one side of the rotating partition plate. Where there are no sleeves on the rotation axis of the rotating partition plates, a rotation gap with a width equal to the outer diameter of the sleeve is reserved. The sum of the sleeve heights of the two rotating partition plates is equal to the height of the rotating partition plates. The two rotating partition plates are interlocked in a cross shape and fitted onto the central shaft through the sleeves.

6. The system for solid hydrogen storage according to claim 5, characterized in that: A rotation seal is provided at the contact point between the rotation gap of each rotating partition plate and the outer wall of the sleeve of another rotating partition plate.

7. The system for solid hydrogen storage according to claim 1, characterized in that: The elastic element is a torsion spring, a herringbone spring, or a fishtail spring.

8. The system for solid hydrogen storage according to claim 7, characterized in that: The fishtail-type spring is a combination structure of a triangular spring and a push rod. The triangular spring has a triangular structure with a broken upper part and a connected lower part. The push rod is set on the outside of the triangular spring. One end of the push rod is fixedly connected to the small end of the triangle, and the other end extends out of the large end of the triangular spring and is fixedly connected to two rotating partition plates respectively.

9. The system for solid hydrogen storage according to claim 1, characterized in that: A cylindrical spring shaft is installed above the top plate of the heat exchange medium distribution and collection box. The elastic element is a torsion spring, which is fixed on the spring shaft.

10. The system for solid hydrogen storage according to claim 1, characterized in that: Rotary seals are provided at the contact points between each rotating partition plate and the inner wall of the hydrogen storage tank, as well as at the contact points with the upper part of the top plate of the heat exchange medium distribution and collection tank.

11. The system for solid hydrogen storage according to claim 1, characterized in that: Within the non-hydrogen storage material storage area, on the inner wall of the hydrogen storage tank, near the starting point limit block corresponding to each rotating partition, a rotation end point limit block is provided, ensuring that each rotating partition can only rotate within the angle corresponding to its corresponding starting point limit block and rotation end point limit block.

12. The system for solid hydrogen storage according to claim 1, characterized in that: Both rotating partition plates have connecting holes with a diameter smaller than the minimum particle size of the solid hydrogen storage material, so that hydrogen can flow between the non-hydrogen storage material storage area and the hydrogen storage material storage area.

13. The system for solid hydrogen storage according to claim 12, characterized in that: A filter screen is installed on the connecting hole to prevent broken, fine solid hydrogen storage material particles from entering the non-hydrogen storage material storage area through the connecting hole. The pore size of the filter screen is smaller than the minimum particle size of the solid hydrogen storage material. The filter screen is located on one side of the rotating partition plate located in the non-hydrogen storage material storage area.

14. The system for solid hydrogen storage according to claim 1, characterized in that: The hydrogen inlet and outlet are located on the cylinder wall corresponding to the hydrogen storage material storage area. Filter screens are installed inside the open pipes of the hydrogen inlet and outlet, and the opening diameter of the filter screens is smaller than the minimum particle size of the solid hydrogen storage material.

15. The system for solid hydrogen storage according to claim 1, characterized in that: The two rotating partition plates are made of triangular or V-shaped screens. The triangular or V-shaped screens simultaneously act as a barrier for the solid hydrogen storage material and facilitate the flow and distribution of hydrogen. The cross-section of the triangular or V-shaped screen is V-shaped or triangular, and the gap is a wedge-shaped gap. The narrowest part of the wedge-shaped gap contacts the solid hydrogen storage material to ensure that the solid hydrogen storage material inside will not leak out of the gap. Hydrogen can pass through the wedge-shaped gap, and the narrowest part of the wedge-shaped gap is smaller than the minimum particle size of the solid hydrogen storage material.

16. The system for solid hydrogen storage according to claim 1, characterized in that: A loosening air inlet is provided on the wall of the hydrogen storage tank corresponding to the hydrogen storage material storage area.

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