A hydrogen storage device

Abstract

This application relates to the technical field of hydrogen storage, and provides a hydrogen storage device. The hydrogen storage device includes a container and a plurality of storage boxes. The container is formed with a hydrogen inlet / outlet and a placement cavity, and the hydrogen inlet / outlet is communicated with the placement cavity. A plurality of storage boxes are all located in the placement cavity, and the plurality of storage boxes are stacked in sequence in the vertical direction. Each storage box is formed with a receiving cavity with an open top, and the receiving cavity is used for containing a solid hydrogen storage material. The hydrogen storage material can be put into the receiving cavity through the open top of the receiving cavity, which is convenient for containing the hydrogen storage material, and the filling difficulty of the hydrogen storage material is small. By using a plurality of storage boxes to separately contain the solid hydrogen storage material, the storage boxes can not only prevent the hydrogen storage material from directly contacting the wall surface of the container, but also prevent the hydrogen storage material from accumulating in large quantities at the bottom of the container.

Description

Technical Field

[0001] This application relates to the technical field of hydrogen storage, and particularly to a hydrogen storage device. Background Art

[0002] The energy density per unit mass of hydrogen is as high as 120.7 kJ / g. To make it economically viable, a major problem to be solved is the safe and effective storage and transportation under the target of ideal storage capacity. Compared with low-temperature and compressed hydrogen storage technologies, the reaction between hydrogen and solid hydrogen storage materials is reversible. Hydrogen storage materials have attracted much attention due to their high volume storage density, good safety, low cost, etc. However, after several hydrogen absorption and desorption cycles, the hydrogen storage materials will gradually powder into relatively small particles. A large number of particles accumulate at the bottom of the container, and the stress generated by volume expansion or contraction during repeated hydrogen absorption and desorption cycles may cause the container to deform or even rupture. Summary of the Invention

[0003] In view of this, this application expects to provide a hydrogen storage device that can prevent hydrogen storage materials from accumulating at the bottom of the container.

[0004] To achieve the above object, an embodiment of this application provides a hydrogen storage device, including:

[0005] A container, formed with a hydrogen inlet / outlet and a placement cavity, the hydrogen inlet / outlet being in communication with the placement cavity;

[0006] A plurality of storage boxes, all located in the placement cavity, the plurality of storage boxes being stacked in sequence in the vertical direction, the storage box being formed with a receiving cavity with an open top, the receiving cavity being used for containing solid hydrogen storage materials.

[0007] In some embodiments, the storage box is formed with a ventilation channel that penetrates in the vertical direction, and the ventilation channels of each storage box are in communication with each other.

[0008] In some embodiments, the storage box includes a bottom plate, an annular plate, and a hollow column. The bottom plate is formed with a through hole. The top and bottom ends of the hollow column are open. The bottom end of the hollow column is connected to the peripheral part of the through hole to form the ventilation channel. The annular plate surrounds the outer periphery of the hollow column, and the bottom end of the annular plate is connected to the bottom plate to form the receiving cavity.

[0009] In some embodiments, the material of the storage box has a plurality of first micropores.

[0010] In some embodiments, the hydrogen storage device includes a plurality of support members all located in the placement cavity. The plurality of support members are arranged at intervals in layers in the vertical direction. The storage box is supported on the support members, and a first gap is formed between two adjacent storage boxes.

[0011] In some embodiments, the support member is connected to the circumferential surface of the placement cavity; and / or,

[0012] A second gap is formed between the outer circumferential surface of the storage box and the circumferential surface of the placement cavity.

[0013] In some embodiments, the support member includes a plurality of support platforms, and the plurality of support platforms are arranged at intervals along the circumference of the storage box, and the storage box is supported on the plurality of support platforms.

[0014] In some embodiments, the support platform includes a support plate arranged in the horizontal direction, and the storage box is supported on the upper surface of the support plate; and / or,

[0015] The support platform includes a connecting plate arranged in the up-down direction, the connecting plate is located between the outer circumferential surface of the storage box and the circumferential surface of the placement cavity, and the connecting plate is connected to the circumferential surface of the placement cavity.

[0016] In some embodiments, the hydrogen storage device includes a baffle, the baffle covers the top opening of the accommodating cavity of the uppermost storage box, the circumferential surface of the baffle is connected to the circumferential surface of the placement cavity, and the baffle is formed with communication holes for hydrogen to flow through.

[0017] In some embodiments, the material of the baffle has a plurality of second micropores.

[0018] In some embodiments, the hydrogen storage device includes a filter located in the placement cavity, the filter covers the outer periphery of the hydrogen inlet / outlet, and the material of the filter has a plurality of third micropores.

[0019] On the one hand, for the hydrogen storage device provided by the embodiments of the present application, the hydrogen storage material can be put into the accommodating cavity through the top opening of the accommodating cavity, which is convenient for storing the hydrogen storage material, and the filling difficulty of the hydrogen storage material is small. On the other hand, the solid hydrogen storage materials are separately stored in a plurality of storage boxes. The storage boxes can not only prevent the hydrogen storage material from directly contacting the wall surface of the container, but also prevent the hydrogen storage material from accumulating in large quantities at the bottom of the container, thereby avoiding stress caused by volume expansion or contraction during the repeated hydrogen absorption and desorption cycles, which may lead to deformation or even rupture of the container, and solving the self-compaction problem caused by the large accumulation of the hydrogen storage material. On the other hand, a plurality of storage boxes are stacked in sequence in the up-down direction, and the top opening of the accommodating cavity facilitates the entry of hydrogen into the accommodating cavity to contact the hydrogen storage material, and also facilitates the discharge of hydrogen from the accommodating cavity during the dehydrogenation process of the hydrogen storage material. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of a hydrogen storage device in an embodiment of the present application;

[0021] Figure 2 is Figure 1Schematic structural diagram of the hydrogen storage device from another perspective;

[0022] Figure 3 is Figure 2 Cross-sectional view taken along the A-A direction in;

[0023] Figure 4 is Figure 1 Schematic diagram of a partial structure of the hydrogen storage device in;

[0024] Figure 5 Schematic structural diagram of the storage box in an embodiment of the present application;

[0025] Figure 6 Schematic structural diagram of the baffle in an embodiment of the present application.

[0026] Description of reference numerals

[0027] Container 1; Hydrogen inlet / outlet 1a; Placement cavity 1b; Tank body 11; Top cover 12; Storage box 2; Accommodation cavity 2a; Ventilation channel 2b; First gap 2c; Second gap 2d; Bottom plate 21; Through hole; Annular plate 22; Hollow column 23; Support member 3; Support platform 31; Support plate 311; Connecting plate 312; Baffle 4; Communication hole 4a; Filter 5; Air pipe 6; Switch valve 7;

[0028] Hydrogen storage material 100; Detailed implementation manners

[0029] It should be noted that, without conflict, the embodiments in the present application and the technical features in the embodiments can be combined with each other. The detailed description in the detailed implementation manners should be understood as an explanatory illustration of the purpose of the present application and should not be regarded as an improper limitation to the present application.

[0030] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. The descriptions such as "first" and "second" in the embodiments of the present application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly including at least one feature. In the description of the embodiments of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined. In the embodiments of the present application, the unit "μm" is micrometer and the unit "mm" is millimeter.

[0031] Please refer to Figures 1 to 3 , the present application provides a hydrogen storage device, which includes a container 1 and a plurality of storage boxes 2. The container 1 is formed with a hydrogen inlet / outlet 1a and a placement cavity 1b, and the hydrogen inlet / outlet 1a is communicated with the placement cavity 1b. The hydrogen inlet / outlet 1a selectively injects hydrogen into the placement cavity 1b or discharges the hydrogen in the placement cavity 1b.

[0032] A plurality of storage boxes 2 are all located in the placement cavity 1b, and the plurality of storage boxes 2 are stacked in sequence in the vertical direction. The storage box 2 is formed with a receiving cavity 2a having an open top end, and the receiving cavity 2a is used for containing the solid hydrogen storage material 100. The hydrogen storage material 100 can reversibly absorb or discharge hydrogen. The hydrogen storage material 100 can be put into the receiving cavity 2a through the open top end of the receiving cavity 2a.

[0033] The hydrogen storage material 100 is generally in granular form. Even if the hydrogen storage material 100 is initially in a blocky form with relatively large dimensions compared to the particles, it will gradually powder into relatively small-sized particles after several hydrogen absorption and desorption cycles. On the one hand, a large number of relatively small-sized particles are stacked together, causing self-compaction problems, or the particles sinter together at a relatively high temperature, thus greatly reducing the actual gas-solid contact surface and making the gas-solid reaction unable to achieve the expected effect, that is, the mass transfer problem of hydrogen also needs to be considered. On the other hand, a large number of particles are stacked at the bottom of the container 1, and the stress generated due to volume expansion or contraction during the repeated hydrogen absorption and desorption cycles may cause the container 1 to deform or even rupture.

[0034] For the hydrogen storage device provided by the embodiment of the present application, on the one hand, the hydrogen storage material 100 can be put into the receiving cavity 2a through the open top end of the receiving cavity 2a, which is convenient for containing the hydrogen storage material 100 and the filling difficulty of the hydrogen storage material 100 is small. On the other hand, the solid hydrogen storage material 100 is separately contained by using a plurality of storage boxes 2. The storage box 2 can not only prevent the hydrogen storage material 100 from directly contacting the wall surface of the container 1, but also prevent the hydrogen storage material 100 from being massively stacked at the bottom of the container 1, thereby avoiding the stress generated due to volume expansion or contraction during the repeated hydrogen absorption and desorption cycles, which may cause the container 1 to deform or even rupture, and solving the self-compaction problem caused by the massive stacking of the hydrogen storage material 100. On the other hand, the plurality of storage boxes 2 are stacked in sequence in the vertical direction, and the top end of the receiving cavity 2a is open, which is convenient for hydrogen to enter the receiving cavity 2a to contact the hydrogen storage material 100, and is also convenient for the hydrogen to be discharged from the receiving cavity 2a during the dehydrogenation process of the hydrogen storage material 100.

[0035] The hydrogen storage material 100 is a hydrogen storage alloy. Exemplarily, the hydrogen storage alloy includes one or more of rare earth-based AB5 type, titanium-based AB type, titanium-based AB2 type, titanium-vanadium solid solution type, and zirconium-based alloy. For example, the hydrogen storage material 100 is a LaNiAl (lanthanum nickel aluminum) hydrogen storage alloy.

[0036] In one embodiment, please refer to Figures 3 to 5 , the storage box 2 is formed with a ventilation channel 2b that penetrates in the vertical direction, and the ventilation channels 2b of each storage box 2 are interconnected. The ventilation channel 2b is used for hydrogen to flow through. The ventilation channel 2b is convenient for hydrogen to flow in the vertical direction. It is both convenient for the hydrogen injected through the hydrogen inlet and outlet 1a to enter the hydrogen storage material 100 in the storage boxes 2 of different layers from top to bottom, and convenient for the hydrogen released by the hydrogen storage material 100 to flow from bottom to top to the hydrogen inlet and outlet 1a, so as to be discharged outside the hydrogen storage device.

[0037] Exemplarily, in one embodiment, please refer to Figure 3 , with a plane perpendicular to the up-down direction as the projection plane, the projections of the ventilation channels 2b of each storage box 2 coincide. In this way, the ventilation channels 2b of each storage box 2 are arranged substantially along the same straight line, which further facilitates the flow of hydrogen and improves the mass transfer effect.

[0038] In one embodiment, please refer to Figure 3 , the highest height of the hydrogen storage material 100 in the accommodation cavity 2a is lower than the top surface of the ventilation channel 2b of the storage box 2 where it is located. That is to say, for a single storage box 2, the highest position of the hydrogen storage material 100 is lower than the top surface of the ventilation channel 2b. In this way, the probability of the hydrogen storage material 100 in the accommodation cavity 2a entering the ventilation channel 2b can be reduced.

[0039] The number of ventilation channels 2b can be one or more. In one embodiment, please refer to Figure 5 , the number of ventilation channels 2b is one, and the accommodation cavity 2a can surround the outer periphery of the ventilation channel 2b. Exemplarily, the ventilation channel 2b is located in the central area of the storage box 2, which not only facilitates the diversion of hydrogen as soon as possible, but also facilitates the large-area contact between hydrogen and the hydrogen storage material 100 in the accommodation cavity 2a as soon as possible or the hydrogen storage material 100 is released as soon as possible to enter the ventilation channel 2b.

[0040] In some embodiments, the aperture of the ventilation channel 2b can be not less than 1 mm. Preferably, the aperture of the ventilation channel 2b is between 10 mm and 15 mm. Exemplarily, the aperture of the ventilation channel 2b is 10 mm, 11 mm, 12 mm, 13 mm or 15 mm, etc.

[0041] Exemplarily, in one embodiment, please refer to Figure 5 , the storage box 2 includes a bottom plate 21, an annular plate 22 and a hollow column 23. The bottom plate 21 is formed with a through hole. The top and bottom ends of the hollow column 23 are open. The bottom end of the hollow column 23 is connected to the surrounding part of the through hole to form the ventilation channel 2b. The annular plate 22 surrounds the outer periphery of the hollow column 23. The bottom end of the annular plate 22 is connected to the bottom plate 21 to form the accommodation cavity 2a. Specifically, the hollow column 23 is located above the bottom plate 21. With a plane perpendicular to the up-down direction as the projection plane, the projection of the accommodation cavity 2a surrounds the outer periphery of the hollow column 23. In this way, the structure of the storage box 2 is simple and easy to manufacture. The storage box 2 has a large hydrogen storage capacity and low cost. The hollow column 23 can separate the ventilation channel 2b and the accommodation cavity 2a, preventing the hydrogen storage material 100 in the accommodation cavity 2a from entering the ventilation channel 2b. The top end of the storage box 2 is completely open, facilitating the flow of hydrogen.

[0042] In one embodiment, please refer to Figure 5, taking a plane perpendicular to the up-down direction as the cross-section, the cross-sectional shape of the placement cavity 1b can be circular, the shape of the bottom plate 21 can also be circular, and the annular plate 22 can be circular-ring-shaped. This can reduce the corners in the placement cavity 1b and the accommodation cavity 2a.

[0043] In one embodiment, the material of the storage box 2 has a plurality of first micropores. The first micropores can allow hydrogen to flow through but cannot leak the hydrogen storage material 100. The pore diameter of the first micropores is smaller than the size of the hydrogen storage material 100. In this way, hydrogen can also flow through the first micropores, so that hydrogen can contact the hydrogen storage materials 100 at different positions in the accommodation cavity 2a or the hydrogen storage materials 100 at different positions in the accommodation cavity 2a can quickly release hydrogen, facilitating the rapid hydrogen absorption and release of the hydrogen storage material 100 and further improving the mass transfer effect of hydrogen.

[0044] The pore diameter of the first micropores is less than 100 μm. Preferably, the pore diameter of the first micropores can be not greater than 5 μm and not less than 0.5 μm. Exemplarily, the pore diameter of the first micropores can be 0.5 μm, 1 μm, 1.5 μm, 2 μm, 2.5 μm, 3 μm, 3.5 μm, 4 μm, 4.5 μm or 5 μm, etc. As the hydrogen storage material 100 cyclically absorbs and releases hydrogen, the particle size of the hydrogen storage material will gradually decrease to about 100 μm. The pore diameter of the first micropores is relatively small to more effectively restrict the hydrogen storage material 100. In this way, the first micropores facilitate the flow of hydrogen and can effectively prevent the leakage of the hydrogen storage material 100.

[0045] The first micropores can be arranged disorderly or orderly. Disorderly arrangement means that a plurality of first micropores are randomly generated without a set rule. Usually, the plurality of first micropores show the characteristics of being connected to each other or partially connected. Orderly arrangement means arranging according to a set rule. This set rule can be artificially designed and controlled. Orderly arrangement includes but is not limited to array arrangement. The orderly arranged first micropores can penetrate the end faces in the thickness direction of the storage box 2. Exemplarily, in one embodiment, the array arrangement can be a one-dimensional array arrangement of a plurality of first micropores, that is, a plurality of first micropores are arranged at intervals in one direction. In one embodiment, the array arrangement can be a two-dimensional array arrangement of a plurality of first micropores, that is, a plurality of first micropores are arranged at intervals in two or more intersecting directions. For example, a plurality of first micropores can be arranged in a rectangular array or a circular array, etc. The number of the orderly arranged first micropores, etc. can be designed and calculated.

[0046] In some embodiments, the material of the storage box 2 is metal. In this way, the storage box 2 has good heat conduction performance to achieve rapid heat exchange between the hydrogen storage material 100 and the storage box 2.

[0047] The material of the storage box 2 includes, but is not limited to, a sintered stainless steel powder or aluminum foam. Through sintering or foaming treatment, multiple first micro-pores are formed in the material of the storage box 2. Thus, the storage box 2 not only has multiple first micro-pores that can be used for mass transfer, i.e., for transmitting hydrogen, but also has good heat conduction performance, enabling rapid heat exchange between the hydrogen storage material 100 and the storage box 2.

[0048] During the hydrogen absorption or release process, a good mass transfer effect, i.e., the hydrogen transfer effect, can affect parameters such as the reaction rate. In one embodiment, please refer to Figure 3 and Figure 4 , the hydrogen storage device includes a plurality of support members 3 all located in the placement cavity 1b. The plurality of support members 3 are arranged at intervals in layers in the vertical direction. The storage box 2 is supported on the support members 3, and a first gap 2c is formed between two adjacent storage boxes 2. Since the rapid circulation of hydrogen facilitates the improvement of the hydrogen absorption and release efficiency, therefore, the support members 3 are used to support the storage box 2 so that a first gap 2c is formed between two adjacent storage boxes 2. The first gap 2c can be used for the circulation of hydrogen, thereby accelerating the flow of hydrogen between different layers of the hydrogen storage material 100 or accelerating the flow of hydrogen released from different layers of the hydrogen storage material 100 to the hydrogen inlet / outlet 1a, preventing hydrogen from accumulating at the top opening of the accommodation cavity 2a and being difficult to discharge, or preventing the hydrogen injected from the hydrogen inlet / outlet 1a from reaching the hydrogen storage material 100 at a lower position. Hydrogen transmission can be achieved through multiple hydrogen gas path transmission channels such as the ventilation channel 2b, the first gap 2c, and the first micro-pores, greatly improving the mass transfer performance, i.e., the hydrogen conduction performance.

[0049] When the hydrogen storage material absorbs hydrogen, a large amount of heat is released, and the heat needs to be removed to achieve the required hydrogen charging rate. To enable the hydrogenation reaction to proceed fully, the hydrogen pressure can be increased or the hydrogen storage material can be cooled; when the hydrogen storage material releases hydrogen, heat needs to be absorbed, which requires providing heat to the hydrogen storage material and quickly removing the released hydrogen. Therefore, reducing the hydrogen pressure or heating is beneficial to the dehydrogenation reaction process. Since the heat transfer performance of particles is greatly reduced compared to that of blocks, especially when the particles are non-metallic materials (such as the metal hydride formed after the hydrogen storage material 100 absorbs hydrogen) or the particle surface is covered with the generated non-metallic substances (such as oxides, nitrides, or carbides formed by the reaction of the hydrogen storage material 100 with impurities in hydrogen), the heat transfer effect of the particles will become extremely poor. Since temperature controls the hydrogenation-dehydrogenation reaction of the hydrogen storage material 100, this uneven heat transfer will cause the hydrogenation-dehydrogenation reaction effect to fail to reach the expected effect. In one embodiment, please refer to Figure 3 and Figure 4 , the support member 3 is connected to the circumferential surface of the placement cavity 1b. That is to say, the support member 3 is in heat transfer contact with the circumferential surface of the placement cavity 1b. In this way, heat conduction can be achieved through contact between the support member 3 and the circumferential surface of the placement cavity 1b, achieving the purpose of quickly adjusting the temperature of the hydrogen storage material 100.

[0050] In one embodiment, please refer to Figure 3 A second gap 2d is formed between the outer peripheral surface of the containing box 2 and the circumferential surface of the placement cavity 1b. The second gap 2d can also be used to circulate hydrogen. On the one hand, since the rapid circulation of hydrogen facilitates the efficiency of hydrogen absorption and release, the second gap 2d can accelerate the flow of hydrogen to different layers of hydrogen storage materials 100 or accelerate the flow of hydrogen released from different layers of hydrogen storage materials 100 to the hydrogen inlet and outlet 1a, so as to avoid the accumulation of hydrogen at the top opening of the containing cavity 2a and the difficulty in discharge, or the difficulty of hydrogen injected into the hydrogen inlet and outlet 1a in reaching the hydrogen storage material 100 at the lower position. On the other hand, it is not necessary to make the container box 2 and the accommodating cavity 2a tightly fit or have an interference fit. If the container box 2 and the accommodating cavity 2a are tightly fit or have an interference fit, the processing accuracy of the container box 2 and / or the container 1 is slightly deviated, or the installation process is slightly tilted, or the inner surface of the placement cavity 1b is contaminated with the hydrogen storage material 100, which will make the installation of the container box 2 difficult, and it is easy to scratch the inner surface of the placement cavity 1b, reduce the service life of the hydrogen storage device, and even bring safety hazards. Therefore, the second gap 2d can reduce the size requirements of the container box 2, which is not only convenient for manufacturing the container box 2, but also convenient for assembling the container box 2 into the placement cavity 1b.

[0051] In order to reduce the difficulty of assembling the container box 2, for example, in one embodiment, please refer to Figure 3 and Figure 4 The cross-sectional shape of the placement cavity 1b is circular, and the cross-sectional shape of the container box 2 is also circular, and the diameter of the container box 2 can be smaller than the diameter of the placement cavity 1b. On the one hand, there is no need to tightly fit or interference fit the container box 2 with the accommodating cavity 2a, so that the size requirements of the container box 2 are relatively low, the size tolerance of the container box 2 is relatively high, the manufacturing process requirements of the container box 2 can be relatively low, the manufacturing difficulty of the container box 2 can be reduced, and the container box 2 is easy to manufacture; on the other hand, it is easy to assemble the container box 2 into the placement cavity 1b.

[0052] In one embodiment, please refer to Figure 3 and Figure 4 The support member 3 includes a plurality of support platforms 31, which are arranged at intervals along the circumference of the container box 2, and the container box 2 is supported on the plurality of support platforms 31. The plurality of support platforms 31 arranged at intervals along the circumference of the container box 2 can support the container box 2 more stably.

[0053] Exemplarily, in some embodiments, the number of the support platforms 31 includes but is not limited to two, three or four, etc. For example, the number of the support platforms 31 is four, and the four support platforms 31 are evenly distributed along the circumference of the container box 2 .

[0054] In one embodiment, please refer to Figure 3 and Figure 4, the support platform 31 includes a support plate 311 arranged in the horizontal direction, and the storage box 2 is supported on the upper surface of the support plate 311. Specifically, the support plate 311 is located between two adjacent storage boxes 2. During assembly, the storage box 2 can be placed on the upper surface of the support plate 311, and the assembly is simple and the installation difficulty is low. The support plate 311 can form a first gap 2c between two adjacent storage boxes 2, achieving two effects of support and isolation. Further, in the up and down direction, the heights of the upper surfaces of the support plates 311 on the same layer are the same. In this way, the heights of all parts of the hydrogen storage material 100 in the accommodation cavity 2a are consistent.

[0055] In one embodiment, please refer to Figure 3 and Figure 4 , the support platform 31 includes a connecting plate 312 arranged in the up and down direction. The connecting plate 312 is located between the outer peripheral surface of the storage box 2 and the circumferential surface of the placement cavity 1b, and the connecting plate 312 is connected to the circumferential surface of the placement cavity 1b. Exemplarily, the end surface of the connecting plate 312 facing the placement cavity 1b is connected to the circumferential surface of the placement cavity 1b. The connection area between the connecting plate 312 and the placement cavity 1b can be relatively large. The connecting plate 312 facilitates fixing the support platform 31 to the circumferential surface of the placement cavity 1b, and the assembly is simple and the installation difficulty is low. The connecting platform can realize the heat transfer structure between the container 1 and the storage box 2, achieving a good heat conduction effect.

[0056] Exemplarily, in one embodiment, please refer to Figure 3 and Figure 4 , one end of the support plate 311 is connected to the lower end of the connecting plate 312. In this way, the support platform 31 is generally L-shaped, with a simple structure, low cost, and easy to manufacture.

[0057] In some embodiments, the support member 3 can be an integrally formed structure. In this way, the structural strength of the support member 3 is good.

[0058] In one embodiment, the support platform 31 is made of a metal material. In this way, the heat conduction effect of the support platform 31 is good. Exemplarily, the material of the support platform 31 includes but is not limited to carbon steel, stainless steel, or nickel alloy, etc.

[0059] Exemplarily, for example, the connecting plate 312 of the support platform 31 and the circumferential surface of the placement cavity 1b can be connected by welding. On the one hand, it is convenient for good heat conduction between the support platform 31 and the container 1; on the other hand, the support platform 31 and the container 1 can be firmly connected.

[0060] In one embodiment, please refer to Figure 3 and Figure 6, the hydrogen storage device includes a baffle 4. The baffle 4 covers the top opening of the accommodation cavity 2a of the uppermost storage box 2. The circumferential surface of the baffle 4 is connected to the circumferential surface of the placement cavity 1b. The baffle 4 is formed with a communication hole 4a for hydrogen to flow through. That is to say, all the storage boxes 2 are located below the cover plate. On the one hand, the baffle 4 can limit the hydrogen storage material 100 in the uppermost storage box 2 in the accommodation cavity 2a to prevent the hydrogen storage material 100 from contacting the hydrogen inlet / outlet 1a. On the other hand, the communication hole 4a facilitates the flow of hydrogen and further improves the mass transfer effect of hydrogen.

[0061] In one embodiment, the material of the baffle 4 has a plurality of second micropores. The second micropores can allow hydrogen to flow through but cannot leak the hydrogen storage material 100. The pore diameter of the second micropores is smaller than the size of the hydrogen storage material 100. In this way, hydrogen can also flow through the second micropores, further improving the mass transfer effect of hydrogen.

[0062] The pore diameter of the second micropores can be less than 100 μm. Exemplarily, in some embodiments, the pore diameter of the second micropores can be not greater than 5 μm and not less than 0.5 μm. Exemplarily, the pore diameter of the second micropores can be 0.5 μm, 1 μm, 1.5 μm, 2 μm, 2.5 μm, 3 μm, 3.5 μm, 4 μm, 4.5 μm or 5 μm, etc. As the hydrogen storage material 100 cyclically absorbs and releases hydrogen, the particle size of the hydrogen storage material will gradually decrease to about 100 μm. The pore diameter of the second micropores is smaller to more effectively limit the hydrogen storage material 100. In this way, the second micropores facilitate the flow of hydrogen and can effectively prevent the leakage of the hydrogen storage material 100.

[0063] The second micropores can be arranged disorderly or orderly. Disorderly arrangement means that a plurality of second micropores are randomly generated without a set rule. Usually, the plurality of second micropores are in a state of being connected to each other or partially connected. Orderly arrangement means arranging according to a set rule. This set rule can be artificially designed and controlled. Orderly arrangement includes but is not limited to array arrangement. The orderly arranged second micropores can penetrate the end faces in the thickness direction of the baffle 4. Exemplarily, in one embodiment, the array arrangement can be a one-dimensional array arrangement of a plurality of second micropores, that is, a plurality of second micropores are arranged at intervals in one direction. In one embodiment, the array arrangement can be a two-dimensional array arrangement of a plurality of second micropores, that is, a plurality of second micropores are arranged at intervals in two or more intersecting directions. For example, a plurality of second micropores can be arranged in a rectangular array or a circular array, etc. The number of the orderly arranged second micropores can be designed and calculated.

[0064] It should be noted that the pore diameter of the communication hole 4a is larger than the pore diameter of the second micropores.

[0065] In some embodiments, please refer to Figure 6, the aperture of the communication hole 4a may be not less than 1 mm. Preferably, the aperture of the communication hole 4a is between 10 mm and 15 mm. Exemplarily, the aperture of the communication hole 4a is 10 mm, 11 mm, 12 mm, 13 mm or 15 mm, etc.

[0066] In some embodiments, the material of the baffle 4 is metal. In this way, the baffle 4 has good heat conduction performance to achieve rapid heat exchange between the hydrogen storage material 100 and the baffle 4.

[0067] The material of the baffle 4 includes but is not limited to a stainless steel powder sintered body or aluminum foam. In this way, the baffle 4 not only has a plurality of second micropores that can be used for mass transfer, that is, for transmitting hydrogen, but also has good heat conduction performance to achieve rapid heat exchange between the hydrogen storage material 100 and the baffle 4.

[0068] In one embodiment, please refer to Figure 3 , with the plane perpendicular to the up and down direction as the projection plane, the projection of the communication hole 4a is not larger than the projection range of the ventilation channel 2b. That is to say, the communication hole 4a can be aligned with the ventilation channel 2b, so as to facilitate the flow of hydrogen between the communication hole 4a and the ventilation channel 2b.

[0069] Exemplarily, in one embodiment, the projection of the communication hole 4a is within the projection range of the ventilation channel 2b. Taking the projections of both the communication hole 4a and the ventilation channel 2b as circles as an example, the diameter of the communication hole 4a is smaller than the diameter of the ventilation channel 2b.

[0070] In another embodiment, the projection of the communication hole 4a coincides with the projection of the ventilation channel 2b. Taking the projections of both the communication hole 4a and the ventilation channel 2b as circles as an example, the diameter of the communication hole 4a is equal to the diameter of the ventilation channel 2b.

[0071] In one embodiment, please refer to Figure 3 , the hydrogen storage device includes a filter 5 located in the placement cavity 1b. The filter 5 covers the outer periphery of the hydrogen inlet / outlet 1a. The material of the filter 5 has a plurality of third micropores. The third micropores can allow hydrogen to flow through but cannot leak the hydrogen storage material 100. The aperture of the third micropores is smaller than the size of the hydrogen storage material 100. On the one hand, the filter 5 can block the hydrogen storage material 100 below and prevent the hydrogen storage material 100 from entering the hydrogen inlet / outlet 1a. In this way, it is avoided that the hydrogen storage material 100 affects the external pipeline or valve parts. On the other hand, the third micropores facilitate the flow of hydrogen and further improve the mass transfer effect of hydrogen.

[0072] The aperture of the third micropores may be less than 100 μm. Exemplarily, in some embodiments, the aperture of the third micropores may be smaller than the aperture of the first micropores and / or the aperture of the second micropores.

[0073] The pore diameter of the third micropores may not be greater than 0.5 μm. Exemplarily, the pore diameter of the third micropores may be 0.1 μm, 0.2 μm, 0.3 μm, 0.4 μm or 0.5 μm, etc. As the hydrogen storage material 100 cyclically absorbs and releases hydrogen, the particle size of the hydrogen storage material will gradually decrease to about 100 μm. The pore diameter of the second micropores is relatively small to more effectively restrict the hydrogen storage material 100. In this way, the third micropores facilitate the flow of hydrogen and can effectively prevent the leakage of the hydrogen storage material 100.

[0074] The third micropores may be arranged disorderly or orderly. Disorderly arrangement means that multiple third micropores are randomly generated without a set rule. Between multiple third micropores, they usually exhibit the characteristics of being connected to each other or partially connected. Orderly arrangement means being arranged according to a set rule. This set rule can be artificially designed and controlled. Orderly arrangement includes but is not limited to array arrangement. The orderly arranged third micropores can penetrate the end faces in the thickness direction of the filter 5. Exemplarily, in one embodiment, the array arrangement may be a one-dimensional array arrangement of multiple third micropores, that is, multiple third micropores are arranged at intervals in one direction. In one embodiment, the array arrangement may be a two-dimensional array arrangement of multiple third micropores, that is, multiple third micropores are arranged at intervals in two or more intersecting directions. For example, multiple third micropores may be arranged in a rectangular array or a circular array, etc. The number of orderly arranged third micropores, etc. can be designed and calculated.

[0075] The material of the filter 5 includes but is not limited to a sintered stainless steel powder body.

[0076] The filter 5 may be a housing. The housing is disposed around the hydrogen inlet / outlet 1a.

[0077] In some embodiments, please refer to Figures 1 to 3 , the container 1 includes a tank body 11 and a top cover 12. The tank body 11 is a hollow structure with an open top end. The top cover 12 is hermetically sealed to the open top end of the tank body 11 to form a placement cavity 1b. The top cover 12 is formed with a hydrogen inlet / outlet 1a. This avoids the leakage of the gas or the hydrogen storage material 100 in the placement cavity 1b through the gap between the top cover 12 and the tank body 11, and also avoids external substances from entering the placement cavity 1b through the gap between the top cover 12 and the tank body 11.

[0078] During the hydrogen absorption or release process, a good heat transfer effect can affect parameters such as the reaction rate. In one embodiment, the container 1 is made of a metal material. In this way, the container 1 has good heat conduction effect. Exemplarily, the material of the container 1 includes but is not limited to carbon steel, stainless steel or nickel alloy, etc. That is to say, the materials of the tank body 11 and the top cover 12 include but are not limited to carbon steel, stainless steel or nickel alloy, etc.

[0079] Exemplarily, in some embodiments, the tank body 11 and the top cover 12 can be hermetically connected by welding.

[0080] In some embodiments, when assembling the hydrogen storage device, the first layer of support platform 31 can be welded to the bottom of the placement cavity 1b first. The first layer of storage box 2 is placed on the support plate 311 of the first layer of support platform 31. The hydrogen storage material 100 is filled into the accommodation cavity 2a, and then the second layer of support platform 31 is welded. The second layer of storage box 2 is placed on the support plate 311 of the second layer of support platform 31. The hydrogen storage material 100 is filled into the accommodation cavity 2a, and this is repeated in sequence until the topmost storage box 2 is assembled. In this way, the assembly is simple and easy to operate.

[0081] In some embodiments, please refer to Figures 1 to 3 , the hydrogen storage device includes an air pipe 6 and a switching valve 7. The air pipe 6 is hermetically connected to the hydrogen inlet and outlet, and the switching valve 7 is arranged on the air pipe 6 to conduct or cut off the air pipe 6.

[0082] In some embodiments, the switching valve 7 includes, but is not limited to, a manual valve, a solenoid valve, a pneumatic valve, and the like.

[0083] In some embodiments, the volume of the placement cavity 1b is between 0.3 L (liters) and 0.4 L. For example, the volume of the placement cavity 1b is 0.3 L, 0.35 L, or 0.4 L, and so on.

[0084] In some embodiments, the outer diameter of the tank body 11 is 60 mm (millimeters), the inner diameter of the tank body 11 is 52 mm, and the length of the tank body 11 is 220 mm.

[0085] In some embodiments, the thickness of the storage box 2 is 2.5 mm. The outer diameter of the annular plate 22 is 51 mm, and the height of the annular plate 22 is 22.5 mm.

[0086] In some embodiments, the diameter of the ventilation channel 2b is 15 mm.

[0087] As described above, only the preferred embodiments of the present application are given, and they are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. All any modifications, equivalent replacements, improvements, etc., within the spirit and principle of the present application are included within the protection scope of the present application.

Claims

1. A hydrogen storage device, characterized in that, Comprising: A container formed with a hydrogen inlet / outlet and a placement cavity, the hydrogen inlet / outlet communicating with the placement cavity; A plurality of storage boxes, all located in the placement cavity, the plurality of storage boxes being stacked in sequence in the vertical direction, the storage box forming a receiving cavity with an open top, the receiving cavity being used for storing solid hydrogen storage materials; A plurality of support members located in the placement cavity, the plurality of support members being arranged at intervals in layers in the vertical direction, the storage box being supported on the support members, a first gap being formed between two adjacent storage boxes, the support member being connected to the circumferential surface of the placement cavity, a second gap being formed between the outer circumferential surface of the storage box and the circumferential surface of the placement cavity, the support member being in heat transfer contact with the circumferential surface of the placement cavity.

2. The hydrogen storage device according to claim 1, characterized in that, The storage box forms a ventilation channel penetrating in the vertical direction, and the ventilation channels of each storage box communicate with each other.

3. The hydrogen storage device according to claim 2, characterized in that, The storage box includes a bottom plate, an annular plate and a hollow column, the bottom plate forming a through hole, the top and bottom ends of the hollow column being open, the bottom end of the hollow column being connected to the peripheral portion of the through hole to form the ventilation channel, the annular plate surrounding the outer circumference of the hollow column, the bottom end of the annular plate being connected to the bottom plate to form the receiving cavity.

4. The hydrogen storage device according to claim 1, characterized in that, The material of the storage box has a plurality of first micropores.

5. The hydrogen storage device according to claim 1, characterized in that, The support member includes a plurality of support platforms, the plurality of support platforms being arranged at intervals along the circumference of the storage box, the storage box being supported on the plurality of support platforms.

6. The hydrogen storage device according to claim 5, characterized in that, The support platform includes a support plate arranged in the horizontal direction, the storage box being supported on the upper surface of the support plate; and / or, The support platform includes a connecting plate arranged in the vertical direction, the connecting plate being located between the outer circumferential surface of the storage box and the circumferential surface of the placement cavity, the connecting plate being connected to the circumferential surface of the placement cavity.

7. The hydrogen storage device according to claim 1, characterized in that, The hydrogen storage device includes a baffle, the baffle covering the top opening of the receiving cavity of the uppermost storage box, the circumferential surface of the baffle being connected to the circumferential surface of the placement cavity, the baffle forming a communication hole for hydrogen to flow through.

8. The hydrogen storage device according to claim 7, characterized in that, The material of the baffle has a plurality of second micropores.

9. The hydrogen storage device according to claim 1, characterized in that, The hydrogen storage device includes a filter located in the placement cavity, the filter covering the outer circumference of the hydrogen inlet / outlet, the material of the filter having a plurality of third micropores.

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