Coupling device of hydrogen storage material and heat storage material

Abstract

The application relates to the hydrogen storage field, in particular to a coupling device of hydrogen storage material and heat storage material, which comprises an outer cover, a first container, solid-state hydrogen storage material, a second container and heat storage material; wherein the first container is arranged in the second container, and a containing space is formed between the side walls of the two; the solid-state hydrogen storage material is arranged in the first container, and the heat storage material is arranged in the containing space; the outer cover is arranged outside the second container, a gas phase space is formed between the inner wall of the outer cover and the outer wall of the second container, a gas phase inlet and outlet which is communicated with the gas phase space is formed in the outer cover, and the second container is formed with an inlet and outlet hole which is communicated with the gas phase space; the first container is formed with a hydrogen inlet and outlet which is communicated with the outside of the outer cover. The device integrates the solid-state hydrogen storage material and the heat storage material in one container, so that the energy can be comprehensively coupled and utilized, the energy utilization rate is effectively improved, and the system structure is simple, the equipment investment and operation cost are saved.

Description

Technical Field

[0001] This application relates to the field of hydrogen storage technology, and in particular to a coupling device for hydrogen storage material and thermal storage material. Background Technology

[0002] Currently, with increasing global emphasis on reducing carbon emissions and addressing climate change, many regions are transitioning to low-carbon or zero-carbon energy systems. Hydrogen storage technology, as an emerging energy storage method, has received increasing attention in recent years. Magnesium-based solid-state hydrogen storage technology is a very promising direction in the field of hydrogen energy storage. It mainly utilizes the reaction of magnesium (Mg) or magnesium-based alloys with hydrogen to generate stable metal hydrides for hydrogen storage. Magnesium-based solid-state hydrogen storage materials have advantages such as low cost, high hydrogen storage density, and ease of transportation.

[0003] However, some challenges remain in practical applications: magnesium-based materials need to remove a large amount of heat of reaction in a timely manner during hydrogen charging; while during hydrogen release, they need to continuously provide heat for the hydrogen release process, and the temperature of the heat of reaction during hydrogen charging and releasing is relatively high (260℃~400℃); in traditional solid-state hydrogen storage systems, cooling or heating equipment needs to be added to the external system of the solid-state hydrogen storage container to match the thermal management of hydrogen charging and releasing, which increases the complexity of the system and causes a large loss of heat energy, resulting in low effective utilization of heat. Utility Model Content

[0004] The purpose of this application is to provide a coupling device for hydrogen storage materials and thermal storage materials, which to some extent solves the technical problem that in traditional solid hydrogen storage systems, cooling or heating equipment needs to be added to the external system of the solid hydrogen storage container to match the thermal management of hydrogen charging and discharging. This causes system complexity, and at the same time causes a large loss of heat energy and low effective utilization rate of heat.

[0005] This application provides a coupling device for a hydrogen storage material and a thermal storage material, comprising: an outer casing, a first container, a solid hydrogen storage material, a second container, and a thermal storage material; wherein, the first container is disposed within the second container, and a receiving space is formed between the side walls of the two; the solid hydrogen storage material is disposed within the first container, and the thermal storage material is disposed within the receiving space, and the thermal storage material is used to absorb the heat released by the solid hydrogen storage material during the hydrogen filling process and generate gaseous substances, or to absorb gaseous substances transported from the outside, react and release heat, so as to supply the hydrogen release required by the solid hydrogen storage material; The outer cover is disposed outside the second container, and a gas phase space is formed between the inner wall of the outer cover and the outer wall of the second container. The outer cover has a gas phase inlet and outlet that communicate with the gas phase space. The second container has an inlet and outlet that communicate with the gas phase space. The first container has a gas phase inlet and outlet that communicate with the outside of the outer cover.

[0006] In the above technical solution, the coupling device of the hydrogen storage material and the heat storage material further includes a hydrogen distribution pipe, which is installed in the first container. One end of the hydrogen distribution pipe extends through the hydrogen inlet and outlet to the interior of the solid hydrogen storage material, and the other end of the hydrogen distribution pipe extends through the hydrogen inlet and outlet to the exterior of the first container and the outer cover. The side wall of the hydrogen distribution pipe is provided with a vent hole. The inner wall and / or outer wall of the hydrogen distribution pipe are provided with a filter screen.

[0007] In any of the above technical solutions, the coupling device between the hydrogen storage material and the heat storage material further includes a heating component, which is disposed on the outer cover.

[0008] In any of the above technical solutions, the coupling device between the hydrogen storage material and the thermal storage material further includes a heat insulation layer, and the heat insulation layer covers the outside of the outer cover.

[0009] In any of the above technical solutions, the bottom of the second container is formed with an opening, and the opening is equipped with a second end cap that can be opened or closed.

[0010] In any of the above technical solutions, the second container further includes a second cylindrical body and a second end cap connected to each other; wherein the second cylindrical body is a hollow structure with openings at both ends, and the top of the outer cover seals the top opening of the second cylindrical body, and the second end cap seals the bottom opening of the second cylindrical body.

[0011] In any of the above technical solutions, the coupling device of the hydrogen storage material and the thermal storage material further includes a gas phase dispersion net, and the gas phase dispersion net is disposed in the gas phase space, and along the height direction of the gas phase space, the gas phase dispersion net is disposed between the gas phase inlet and outlet and the second container.

[0012] In any of the above technical solutions, the first container further includes a first cylindrical body and a first end cap; wherein the first cylindrical body is a hollow structure with an open top, the first end cap is sealed at the top open end of the first cylindrical body, and the first end cap forms the hydrogen inlet and outlet.

[0013] In any of the above technical solutions, the first container further includes a first flange and a first fastening member; wherein the first flange is fixed to the top opening end of the first cylinder, and the first end cap and the first flange are detachably connected through the first fastening member.

[0014] In any of the above technical solutions, the outer cover further includes a main cover body, an end flange, a flange cover, a second fastening member, and a gas phase inlet / outlet pipe; wherein, the main cover body is a hollow structure with openings at the top and bottom, and the top of the first container extends to the outside of the main cover body through the top opening of the main cover body. The end flange is fixed to the bottom opening of the main cover, and the flange cover is detachably connected to the end flange through the second fastening member; the gas phase inlet and outlet pipes are installed sequentially on the end flange and the flange cover, and the two ends of the gas phase inlet and outlet pipes extend to the inside and outside of the main cover, respectively.

[0015] In any of the above technical solutions, the first container is further connected to the outer cover.

[0016] In any of the above technical solutions, the second container is further connected to the outer cover.

[0017] In any of the above technical solutions, a first expansion space is further formed between the solid hydrogen storage material and the top of the first container along the height direction of the first container.

[0018] In any of the above technical solutions, a second expansion space is further formed between the heat storage material and the top of the second container along the height direction of the second container.

[0019] In any of the above technical solutions, the solid hydrogen storage material is further described as a magnesium-based solid hydrogen storage material.

[0020] In any of the above technical solutions, the heat storage material is further described as magnesium hydroxide heat storage material.

[0021] Compared with the prior art, the beneficial effects of this application are as follows: The coupling device for hydrogen storage materials and thermal storage materials provided in this application integrates solid hydrogen storage materials, such as magnesium-based solid hydrogen storage materials, and thermal storage materials, such as magnesium hydroxide thermal storage materials, into a single container, so that their energy can be comprehensively coupled and utilized, effectively improving energy utilization. Moreover, using this device, hydrogen can be charged and discharged in the same or different locations without the need for additional cooling or heating equipment, which greatly reduces the complexity of the system and saves on system equipment investment and a large amount of operating costs. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the coupling device between hydrogen storage material and thermal storage material provided in the embodiments of this application.

[0024] Figure label: 1-Outer cover, 11-Main cover body, 12-End flange, 13-Flange cover, 14-Gas phase inlet / outlet pipe, 2-First container, 21-First cylinder, 22-First end cover, 23-First flange, 24-First expansion space, 3-Solid hydrogen storage material, 4-Second container, 41-Second cylinder, 42-Second end cover, 43-Second expansion space, 5-Heat storage material, 6-Gas phase space, 7-Hydrogen distribution pipe, 8-Insulation layer, 9-Gas phase dispersion net. Detailed Implementation

[0025] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0026] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.

[0027] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0030] The following reference Figure 1 This application describes a coupling device for hydrogen storage materials and thermal storage materials according to some embodiments.

[0031] See Figure 1 As shown, an embodiment of this application provides a coupling device for a hydrogen storage material and a heat storage material, including: an outer cover 1, a first container 2, a solid hydrogen storage material 3, a second container 4, and a heat storage material 5; wherein, the first container 2 is disposed inside the second container 4, and an accommodating space is formed between the side walls of the two; the solid hydrogen storage material 3 is disposed inside the first container 2, and the heat storage material 5 is disposed inside the accommodating space, and the heat storage material 5 is used to absorb the heat released by the solid hydrogen storage material 3 during the hydrogen filling process and generate gaseous substances, or to absorb gaseous substances transported from the outside, react and release heat, so as to supply the hydrogen release required by the solid hydrogen storage material 3; The outer cover 1 is installed outside the second container 4, and a gas phase space 6 is formed between the inner wall of the outer cover 1 and the outer wall of the second container 4. The outer cover 1 has a gas phase inlet and outlet connected to the gas phase space 6. The second container 4 has an inlet and outlet hole connected to the gas phase space 6. The first container 2 has a hydrogen inlet and outlet connected to the outside of the outer cover 1.

[0032] It should be noted that, in this embodiment, preferably, the solid hydrogen storage material 3 is a magnesium-based solid hydrogen storage material, and the heat storage material 5 is a magnesium hydroxide heat storage material. The magnesium-based solid hydrogen storage material releases a large amount of heat during the hydrogen charging process, and the magnesium hydroxide can utilize this heat to decompose and produce magnesium oxide, releasing water vapor, thereby storing this heat. When the magnesium-based solid hydrogen storage material needs to release hydrogen, the magnesium oxide reacts with the water vapor transported from the outside to turn the magnesium oxide into magnesium hydroxide, releasing a large amount of heat to supply the heat required for the magnesium-based solid material to release hydrogen. The following will also use the above materials as an example for explanation. Of course, the solid hydrogen storage material 3 is not limited to magnesium-based solid hydrogen storage materials, but can also be other types of solid hydrogen storage materials, such as titanium-iron based solid hydrogen storage materials or lanthanum-nickel based solid hydrogen storage materials, etc. In addition, the heat storage material 5 is not limited to magnesium hydroxide heat storage materials, but can also be other types of heat storage materials that can react to produce gaseous substances, such as calcium hydroxide or calcium carbonate, etc., depending on actual needs.

[0033] Based on the structure described above, the general working process of the coupling device for hydrogen storage material and thermal storage material provided in this application is as follows: In the initial stage of hydrogen charging, the entire device is first raised to the hydrogen charging temperature, then heating is stopped, and hydrogen is started to be charged into the first container 2. The solid hydrogen storage material 3 reacts with hydrogen to generate magnesium hydride and release a large amount of heat. This heat is transferred to the interior of the heat storage material 5, such as magnesium hydroxide heat storage material, through heat conduction. The magnesium hydroxide heat storage material absorbs the heat and decomposes into magnesium oxide and water vapor. The water vapor enters the gas phase space 6 through the inlet and outlet holes and is discharged through the gas phase inlet and outlet. The discharged water vapor can be condensed and the heat recovered.

[0034] During the hydrogen release stage, if the initial temperature does not meet the requirements for hydrogen release, the device needs to be heated to raise the entire device to the hydrogen release temperature. Then, heating is stopped, and high-temperature water vapor is introduced into the gas phase space 6 through the gas phase inlet and outlet. The water vapor gradually enters the interior of the heat storage material 5, such as magnesium hydroxide heat storage material, and reacts with the magnesium oxide formed by the aforementioned reaction, releasing a large amount of heat. This heat enters the interior of the solid hydrogen storage material 3 through heat conduction. The solid hydrogen storage material 3 absorbs the heat and releases hydrogen gas. The hydrogen gas is discharged through the hydrogen gas inlet and outlet. It can be seen that hydrogen gas release is achieved simply by continuously introducing water vapor.

[0035] As can be seen, the coupling device for hydrogen storage materials and thermal storage materials provided in this application integrates solid hydrogen storage material 3, such as magnesium-based solid hydrogen storage material, and thermal storage material 5, such as magnesium hydroxide thermal storage material, into a container so that their energy can be comprehensively coupled and utilized, effectively improving energy utilization. Moreover, using this device, hydrogen can be charged and discharged in the same or different locations without the need for additional cooling or heating equipment, which greatly reduces the complexity of the system and saves the system's equipment investment and a large amount of operating costs. In this embodiment, preferably, as follows: Figure 1 As shown, the coupling device between the hydrogen storage material and the thermal storage material also includes a hydrogen distribution pipe 7. The hydrogen distribution pipe 7 is installed in the first container 2, and one end of the hydrogen distribution pipe 7 extends through the hydrogen inlet and outlet to the interior of the solid hydrogen storage material 3. The other end of the hydrogen distribution pipe 7 extends through the hydrogen inlet and outlet to the exterior of the first container 2 and the outer cover 1. The side wall of the hydrogen distribution pipe 7 is provided with a vent hole for transporting the hydrogen in the hydrogen distribution pipe 7 to the solid hydrogen storage material 3, or for timely discharge of the hydrogen released by the solid hydrogen storage material 3. As described above, the hydrogen distribution pipe 7 is designed, and one end of the hydrogen distribution pipe 7 can extend into the interior of the solid hydrogen storage material 3. This allows externally supplied hydrogen to be transported into the interior of the solid hydrogen storage material 3, increasing the contact area between the hydrogen and the solid hydrogen storage material 3, thus enabling a more complete reaction between the solid hydrogen storage material 3 and the hydrogen. Simultaneously, during hydrogen release, the hydrogen can be promptly discharged through the hydrogen distribution pipe 7, improving the reaction rate. It should be noted that in this application, the hydrogen distribution pipe 7 may not be provided; hydrogen can be directly input or discharged through the hydrogen inlet and outlet. Preferably, the hydrogen inlet and outlet can be directly connected to an external hydrogen source or a device to be charged via pipelines, depending on actual needs.

[0036] Furthermore, preferably, a filter screen is provided on the outer wall of the hydrogen distribution pipe 7 to prevent powdered solid hydrogen storage material 3, such as magnesium-based solid hydrogen storage material, from entering the hydrogen distribution pipe 7 during the hydrogen charging and discharging process, thus preventing blockage of the pipe, and also ensuring the purity of the discharged hydrogen. It should be noted that: the filter screen is not limited to being provided on the outer wall of the hydrogen distribution pipe 7; it can also be provided only on the inner wall of the hydrogen distribution pipe 7, or simultaneously on both the inner and outer walls of the hydrogen distribution pipe 7. Of course, the aforementioned filter screen may also be omitted, depending on the actual needs.

[0037] In this embodiment, preferably, as follows: Figure 1 As shown, the coupling device between the hydrogen storage material and the thermal storage material also includes a heating component, which is disposed on the outer cover 1. As can be seen from the structure described above, the device can be heated by heating components in both the initial stage of hydrogen charging and the initial stage of hydrogen discharging. Therefore, the device itself is equipped with heating components, making it more convenient to use.

[0038] It should be noted that the heating element can be embedded in the side wall of the outer cover 1 or set on the outer side wall of the outer cover 1. Both of these structures can ensure that the heating element does not come into contact with the water vapor in the gas phase space 6, which helps to ensure the normal operation of the heating element and to extend its service life. Of course, it is not limited to this. The heating element can also be set on the inner side wall of the outer cover 1. In addition, it should be noted that the aforementioned heating element may not be set. The specific choice depends on the actual needs.

[0039] Furthermore, preferably, the heating element can be an electric heating wire or an electric heating tube, etc., selected according to actual needs.

[0040] In this embodiment, preferably, as follows: Figure 1 As shown, the coupling device between the hydrogen storage material and the thermal storage material also includes a thermal insulation layer 8, which covers the outside of the outer casing 1. Based on the structure described above, it can be seen that the insulation layer 8 plays a role in heat preservation, with minimal heat loss to the outside.

[0041] In this embodiment, preferably, as follows: Figure 1 As shown, the bottom of the second container 4 has an opening, and the opening is equipped with a second end cap 42 that can be opened or closed. As can be seen from the structure described above, the bottom of the second container 4 can be opened or closed, which facilitates the replacement of the internal heat storage material 5 and improves the convenience of operation. In this embodiment, preferably, as follows: Figure 1 As shown, the second container 4 includes a second cylindrical body 41 connected to the second end cap 42 mentioned above; wherein, the second cylindrical body 41 is a hollow structure with openings at both ends, and the top of the outer cover 1 covers the top opening of the second cylindrical body 41, and the second end cap 42 covers the bottom opening of the second cylindrical body 41. As can be seen from the structure described above, the second cylinder 41 has a simple structure and is easy to replace the heat storage material 5 inside it.

[0042] Furthermore, preferably, the second end cap 42 can be connected to the cylinder body by screws or bolts. Of course, it is not limited to this and other structures can also be used. For example, one side of the second end cap 42 is rotatably connected to the second cylinder body 41, and the other side of the second end cap 42 is detachably connected to the second cylinder body 41 by existing locks, bolts or buckles, etc.

[0043] In this embodiment, preferably, as follows: Figure 1 As shown, the coupling device for hydrogen storage material and thermal storage material also includes a gas phase dispersion net 9, which is disposed in the gas phase space 6 and is located between the gas inlet / outlet and the second container 4 along the height direction of the gas phase space 6. As described above, a gas phase dispersion net 9 is installed between the gas phase inlet / outlet and the second container 4. This allows external water vapor to enter and disperse evenly after passing through the net 9, ensuring sufficient contact with the heat storage material 5 at each location and thus promoting a more complete reaction. Alternatively, the gas phase dispersion net 9 can be omitted, depending on the specific needs.

[0044] Furthermore, preferably, the gas phase dispersion net 9 is connected to the inner wall of the outer cover 1. In this embodiment, preferably, as follows: Figure 1 As shown, the first container 2 includes a first cylindrical body 21 and a first end cap 22; wherein, the first cylindrical body 21 is a hollow structure with an open top, the first end cap 22 is sealed at the open top end of the first cylindrical body 21, and the first end cap 22 forms a hydrogen inlet and outlet. As can be seen from the structure described above, the first cylinder 21 has a simple structure and is easy to install and disassemble, and is especially easy to maintain. In this embodiment, preferably, as follows: Figure 1 As shown, the first container 2 also includes a first flange 23 and a first fastening member; wherein, the first flange 23 is fixed to the top opening end of the first cylinder 21, and the first end cap 22 and the first flange 23 are detachably connected by the first fastening member. As can be seen from the structure described above, by setting a first flange 23 at the end of the first cylinder 21, it is convenient to install the first end cover 22. Moreover, the first end cover 22 and the first flange 23 cooperate to effectively ensure the assembly area and improve the stability and firmness after assembly. In addition, the first end cover 22 and the first flange 23 are connected by a first fastening component such as screws or bolts, which is a detachable connection structure, which is convenient for later maintenance and replacement of the solid hydrogen storage material 3 inside. Furthermore, preferably, the top end of the first cylinder 21 extends to the outside of the outer cover 1, and thus the first end cap 22 and the first flange 23 are also located outside the outer cover 1. This facilitates assembly, reduces the likelihood of interference, and facilitates the transport of hydrogen. Of course, this is not the only option.

[0045] Furthermore, preferably, the first flange 23 can be fixed to the top of the first cylinder 21 by welding or other means, which results in a robust structure and a simple process.

[0046] In this embodiment, preferably, as follows: Figure 1 As shown, the outer cover 1 includes a main cover body 11, an end flange 12, a flange cover 13, a second fastening member, and a gas phase inlet / outlet pipe 14; wherein, the main cover body 11 is a hollow structure with openings at the top and bottom, and the top of the first container 2 extends to the outside of the main cover body 11 through the top opening of the main cover body 11; the end flange 12 is fixed to the bottom opening end of the main cover body 11, and the flange cover 13 is detachably connected to the end flange 12 through the second fastening member; the gas phase inlet / outlet pipe 14 is sequentially installed on the end flange 12 and the flange cover 13, and the two ends of the gas phase inlet / outlet pipe 14 extend to the inside and outside of the main cover body 11, respectively. As can be seen from the structure described above, by setting an end flange 12 at the end of the main cover 11, it is convenient to install the flange cover 13. Moreover, the flange cover 13 and the end flange 12 cooperate to effectively ensure the assembly area and improve the stability and firmness after assembly. In addition, the flange cover 13 and the end flange 12 are connected by a second fastening component such as screws or bolts, which is a detachable connection structure that facilitates later maintenance. Furthermore, preferably, the end flange 12 can be fixed to the bottom of the main cover 11 by welding or other means, which results in a sturdy structure and a simple process.

[0047] In this embodiment, preferably, as follows: Figure 1 As shown, the first container 2 is connected to the outer cover 1. As can be seen from the structure described above, the first container 2 is connected to the outer cover 1, and the outer cover 1 serves to support the first container 2.

[0048] Furthermore, preferably, the first container 2 and the outer cover 1 can be connected by welding, bolts or buckles.

[0049] In this embodiment, preferably, as follows: Figure 1 As shown, the second container 4 is connected to the outer cover 1. As can be seen from the structure described above, the second container 4 is connected to the outer cover 1, and the outer cover 1 serves to support the second container 4.

[0050] Furthermore, preferably, the second container 4 and the outer cover 1 can be connected by welding, bolts or buckles.

[0051] It should be noted that in this embodiment, the structure is not limited to the first container 2 and the second container 4 being connected to the outer cover 1. It is also possible to have the first container 2 connected to the outer cover 1 and the second container 4 not connected to the outer cover 1, or the first container 2 not connected to the outer cover 1 and the second container 4 connected to the outer cover 1, etc., depending on the actual needs.

[0052] In this embodiment, preferably, as follows: Figure 1 As shown, a first expansion space 24 is formed between the solid hydrogen storage material 3 and the top of the first container 2 along the height direction of the first container 2. It can be seen that the first expansion space 24 reserved on the top of the solid hydrogen storage material 3 prevents the solid hydrogen storage material 3 from pushing open the top of the outer cover 1 due to expansion, which helps to ensure the reliability of the structure.

[0053] In this embodiment, preferably, as follows: Figure 1 As shown, a second expansion space 43 is formed between the heat storage material 5 and the top of the second container 4 along the height direction of the second container 4. It can be seen that the second expansion space 43 reserved at the top of the heat storage material 5 prevents the heat storage material 5 from pushing open the end cap due to expansion, which helps to ensure the reliability of the structure.

[0054] In summary, the detailed working process of the coupling device for hydrogen storage material and thermal storage material provided in this application is as follows: In the initial stage of hydrogen charging, the external power supply is turned on, and the entire device is raised to the hydrogen charging temperature using heating components such as electric heating wires. Then, the electric heating wires are turned off, and hydrogen is charged into the container. Hydrogen enters the hydrogen distribution pipe 7 through the inlet end of the hydrogen distribution pipe 7 and enters the interior of the solid hydrogen storage material 3 through the vent on the hydrogen distribution pipe 7. It reacts with the solid hydrogen storage material 3 to generate magnesium hydride and release a large amount of heat. This heat is transferred to the interior of the heat storage material 5 through heat conduction. The heat storage material 5, such as magnesium hydroxide, absorbs the heat and decomposes into magnesium oxide and water vapor. The water vapor enters the gas phase space 6 through the inlet and outlet holes on the side wall of the second container 4 and is discharged through the gas phase inlet and outlet. The discharged water vapor can be condensed and the heat recovered.

[0055] During the hydrogen release stage, if the initial temperature does not meet the requirements for hydrogen release, an external power supply needs to be connected to raise the entire device to the hydrogen release temperature using an electric heating wire. Then, the electric heating wire is turned off, and the steam valve of the steam source is opened to introduce high-temperature steam into the gas phase space 6 through the gas phase inlet / outlet pipe 14. The steam is then evenly dispersed through the gas phase dispersion net 9. The steam gradually enters the interior of the heat storage material 5, such as magnesium hydroxide heat storage material 5, and reacts with the previously generated magnesium oxide, releasing a large amount of heat. This heat enters the interior of the solid hydrogen storage material 3 through heat conduction. The solid hydrogen storage material 3 absorbs the heat and releases hydrogen. The hydrogen enters the pipe through the vent on the hydrogen distribution pipe 7 and is eventually led out of the device. It can be seen that hydrogen release is achieved simply by continuously introducing steam.

[0056] Based on the above, the coupling device for hydrogen storage material and thermal storage material provided in this application has the following structure and advantages: First, this application uses a structure that integrates solid hydrogen storage material 3 and heat storage material 5, which can directly store the heat generated by solid hydrogen storage material 3 when it is filled with hydrogen in the adjacent heat storage material 5. When solid hydrogen storage material 3 needs to release hydrogen, the heat stored in heat storage material 5 is released and provided to solid hydrogen storage material 3 so that it can continuously release hydrogen. Moreover, there is a wall-type contact between solid hydrogen storage material 3 and heat storage material 5, and heat is transported and transferred through thermal conduction. Heating components such as electric heating wires are provided to ensure the starting heat source during hydrogen charging. A detachable first end cap 22, flange cap 13, and second end cap 42 for filling are also provided to facilitate the filling of solid hydrogen storage material 3 and heat storage material 5. Meanwhile, an insulation layer 8 is set on the outside of the container. This insulation layer 8 is made of nano-aerogel material with low thermal conductivity, which ensures that the container loses little heat to the outside. Meanwhile, a filter screen is attached to the outer surface of the hydrogen distribution pipe 7 to prevent powdered solid hydrogen storage material 3, such as magnesium-based solid hydrogen storage material, from entering the pipe during the hydrogen charging and discharging process and clogging the pipe, while also ensuring the purity of the hydrogen outlet. A gas phase dispersion mesh with 9 holes was also installed to achieve uniform distribution of water vapor.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A coupling device for hydrogen storage material and thermal storage material, characterized in that, include: The system comprises an outer casing, a first container, a solid hydrogen storage material, a second container, and a heat storage material; wherein the first container is disposed within the second container, and a receiving space is formed between the side walls of the two containers; the solid hydrogen storage material is disposed within the first container, and the heat storage material is disposed within the receiving space; the heat storage material is used to absorb the heat released by the solid hydrogen storage material during the hydrogen filling process and generate gaseous substances, or to absorb gaseous substances transported from the outside, react with them, and release heat to supply the hydrogen release requirements of the solid hydrogen storage material; The outer cover is disposed outside the second container, and a gas phase space is formed between the inner wall of the outer cover and the outer wall of the second container. The outer cover has a gas phase inlet and outlet connected to the gas phase space, and the second container has an inlet and outlet hole connected to the gas phase space. The first container has a hydrogen inlet and outlet connected to the outside of the outer cover.

2. The coupling device for hydrogen storage material and thermal storage material according to claim 1, characterized in that, The coupling device between the hydrogen storage material and the heat storage material further includes a hydrogen distribution pipe, which is installed in the first container. One end of the hydrogen distribution pipe extends through the hydrogen inlet and outlet to the interior of the solid hydrogen storage material, and the other end extends through the hydrogen inlet and outlet to the exterior of the first container and the outer cover. The side wall of the hydrogen distribution pipe is provided with a vent hole. The inner wall and / or outer wall of the hydrogen distribution pipe are provided with a filter screen.

3. The coupling device for hydrogen storage material and thermal storage material according to claim 1, characterized in that, The coupling device between the hydrogen storage material and the thermal storage material also includes a heating component, which is disposed on the outer cover.

4. The coupling device for hydrogen storage material and thermal storage material according to claim 1, characterized in that, The coupling device between the hydrogen storage material and the thermal storage material also includes a heat insulation layer, which covers the outside of the outer casing.

5. The coupling device for hydrogen storage material and thermal storage material according to claim 1, characterized in that, The bottom of the second container has an opening, and the opening is equipped with a second end cap that can be opened or closed.

6. The coupling device for hydrogen storage material and thermal storage material according to claim 5, characterized in that, The second container includes a second cylindrical body and a second end cap connected to each other; wherein the second cylindrical body is hollow inside and open at both ends, and the top of the outer cover seals the top opening of the second cylindrical body, and the second end cap seals the bottom opening of the second cylindrical body.

7. The coupling device for hydrogen storage material and thermal storage material according to claim 1, characterized in that, The coupling device for the hydrogen storage material and the thermal storage material further includes a gas phase dispersion net, which is disposed within the gas phase space and positioned between the gas phase inlet / outlet and the second container along the height direction of the gas phase space.

8. The coupling device for hydrogen storage material and thermal storage material according to claim 1, characterized in that, The first container includes a first cylindrical body and a first end cap; wherein the first cylindrical body is hollow inside and open at the top, the first end cap is sealed at the top opening of the first cylindrical body, and the first end cap forms the hydrogen inlet and outlet.

9. The coupling device for hydrogen storage material and thermal storage material according to claim 8, characterized in that, The first container further includes a first flange and a first fastening member; wherein the first flange is fixed to the top opening end of the first cylinder, and the first end cap is detachably connected to the first flange through the first fastening member.

10. The coupling device of claim 1 to 9, wherein The outer casing includes a main casing body, end flanges, flange covers, a second fastening component, and gas phase inlet / outlet pipes; wherein, the main casing body is hollow internally and open at both the top and bottom, and the top of the first container extends to the outside of the main casing body through the top opening; the end flanges are fixed to the bottom opening of the main casing body, and the flange cover is detachably connected to the end flanges via the second fastening component; the gas phase inlet / outlet pipes are sequentially installed on the end flanges and the flange cover, and both ends of the gas phase inlet / outlet pipes extend to the inside and outside of the main casing body, respectively; and / or The first container is connected to the outer cover; and / or The second container is connected to the outer cover; and / or Along the height direction of the first container, a first expansion space is formed between the solid hydrogen storage material and the top of the first container; and / or Along the height direction of the second container, a second expansion space is formed between the heat storage material and the top of the second container; and / or The solid hydrogen storage material is a magnesium-based solid hydrogen storage material; and / or The heat storage material is magnesium hydroxide heat storage material.

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