Metal hydride hydrogen storage device

Abstract

The utility model relates to the technical field of hydrogen storage devices, and discloses a metal hydride hydrogen storage device, which comprises a tank body, a hydrogen storage tank (2), a hydrogen storage tank (3) and a hydrogen storage tank (4), the hydrogen storage assembly (2) is arranged in the tank body and comprises an air pipe (21) which is communicated with the air inlet and extends in the axial direction of the tank body, a plurality of fins (22) which are connected to the air pipe and are arranged at intervals and a hydrogen storage material pressing sheet (23) arranged in an interlayer of the fins, and the outer peripheries of the fins are detachably connected with the side wall of the tank body (1); a hydrogen storage bed layer is formed between every two adjacent fins, and the hydrogen storage bed layers are communicated with the air inlet and the interlayers of the fins. The fins are detachably connected with the tank body, so that the pressed hydrogen storage material tablets can be mounted in the interlayers of the fins in advance, the fins are further connected with the tank body, filling of the hydrogen storage materials is facilitated, and compared with powdery hydrogen storage materials, the hydrogen storage material tablets effectively improve the heat transfer effect.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen storage devices, in particular to a metal hydride hydrogen storage device. Background Art

[0002] As a secondary energy source, hydrogen energy has the characteristics of wide sources, clean and carbon-free, flexible and efficient, and a wide range of application scenarios. It can be widely used in energy, transportation, industry, construction and other fields. It is an ideal interconnected medium to promote the clean and efficient use of traditional fossil energy and support the large-scale development of renewable energy. It will gradually become an important direction for the development of global energy technology. However, the safe and efficient storage technology of hydrogen has become one of the bottlenecks for its large-scale application.

[0003] At present, common hydrogen storage methods include high-pressure gaseous hydrogen storage, liquid hydrogen storage, organic liquid hydrogen storage and solid-state hydrogen storage. Among them, for high-pressure gaseous hydrogen storage, its volume hydrogen storage density is low and the hydrogen storage pressure is high (35-70MPa), which poses a high safety risk; liquid hydrogen needs to be stored below 20K, and the liquefaction process has high energy consumption and there is evaporation loss during use, which is a problem that needs to be solved urgently; organic liquids have problems such as low hydrogen release purity and poor cycle performance, which still need further research. Compared with the first three hydrogen storage methods, solid-state hydrogen storage provides a feasible hydrogen storage solution with high volume hydrogen storage density, low working pressure and good reversibility, and has broad application prospects in transportation, microgrids, hydrogen compression, heat storage and other fields.

[0004] Among them, Chinese patent CN114370602B discloses a metal hydride hydrogen storage tank with strong stress resistance and good heat and mass transfer effects, and specifically discloses that a hydrogen storage module composed of a foam metal disk, an expanded graphite disk, and a heat dissipation fin is fixedly connected to the tank body, and several hydrogen storage modules are filled with hydrogen storage material powder, and the hydrogen storage modules are arranged layer by layer, which ensures the rapid conduction of heat and improves the hydrogen absorption and desorption efficiency of the metal hydride hydrogen storage tank. However, since the hydrogen storage module is fixed or welded to the inner wall of the tank body, only powdered hydrogen storage material can be filled, but the heat transfer effect of powdered hydrogen storage material is not good, and after the powdered hydrogen storage material absorbs hydrogen, it will gradually settle, gather and expand under the action of gravity, causing the tank body to deform or even rupture.

[0005] Therefore, it is urgent to propose corresponding solutions to the problems that powdered hydrogen storage materials have poor heat transfer effects and that after absorbing hydrogen, the powdered hydrogen storage materials will gradually settle, gather and expand under the action of gravity, causing deformation or even rupture of the tank. Utility Model Content

[0006] The purpose of the utility model is to overcome the problem that the powdered hydrogen storage material in the prior art has a poor heat transfer effect and that after absorbing hydrogen, the powdered hydrogen storage material will gradually settle, gather and expand under the action of gravity, causing deformation or even rupture of the tank body.

[0007] In order to achieve the above-mentioned purpose, the utility model provides a metal hydride hydrogen storage device on the one hand, comprising: a tank body, a top of which is provided with an air inlet for hydrogen to enter; a hydrogen storage assembly, which is arranged in the tank body and includes an air pipe connected to the air inlet and extending along the axial direction of the tank body, a plurality of fins connected to the air pipe and arranged at intervals from each other, and a hydrogen storage material press sheet arranged in the interlayer of the fins, the outer peripheral edge of the fin is detachably engaged with the side wall of the tank body, and hydrogen storage beds are formed between adjacent fins, respectively, and the hydrogen storage beds are connected to the air inlet and the interlayer of the fins.

[0008] In some embodiments, the hydrogen storage material tablet comprises a hydrogen storage alloy and a thermal conductive material, and the mass ratio of the hydrogen storage alloy to the thermal conductive material is 1:(0.01-0.2).

[0009] In some embodiments, the thickness of the hydrogen storage material tablet is 5-50 mm.

[0010] In some embodiments, a through hole is opened in the center of the fin, the air pipe passes through the fin through the through hole, and the air pipe is threadedly connected to the fin.

[0011] In some embodiments, a plurality of air holes are evenly formed on the fin, the ratio of the total area of ​​all the air holes to the area of ​​the fin is (0.02-0.15):1, and the diameter of each of the air holes is 3-20 mm.

[0012] In some embodiments, the side wall of the gas pipe is evenly provided with openings, and the hydrogen storage bed is connected to the gas inlet through the openings.

[0013] In some embodiments, the tank body is a cylinder with a height of 50-600 mm and an inner diameter of 10-100 mm, and each of the fins includes a pair of discs adapted to the tank body.

[0014] In some embodiments, the air pipe includes a plurality of air pipe segments extending along the axial direction of the tank body and connected to adjacent fins at both ends, and at least one end of each of the air pipe segments is detachably connected to the fin.

[0015] In some embodiments, the fins are copper sheets or stainless steel sheets, and the number of the fins is 3-20.

[0016] In some embodiments, the air inlet pipe connected to the air inlet is further included, and a filter is disposed inside the air inlet pipe, and the accuracy of the filter is 0.5-2 μm.

[0017] In the above technical solution, the fins are detachably connected to the tank body so that the hydrogen storage material pressed sheet can be installed in advance in the interlayer of the fins, and then the fins are connected to the tank body, which is convenient for filling the hydrogen storage material, and compared with the powdered hydrogen storage material, the hydrogen storage material pressed sheet effectively improves the heat transfer effect. At the same time, multiple fins can be arranged at intervals along the axial direction of the tank body, and multiple hydrogen storage beds are formed between adjacent fins, so that the hydrogen storage material pressed sheet can be divided into multiple fins, further avoiding the concentrated stress generated by the hydrogen storage material absorbing hydrogen and expanding on the tank body, thereby causing the tank body to be damaged, and improving the safety of the hydrogen storage tank body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the cross-sectional structure of the metal hydride hydrogen storage device disclosed in the utility model;

[0019] Figure 2 yes Figure 1 A top view of the fins in the metal hydride hydrogen storage device disclosed in;

[0020] Figure 3 yes Figure 1 A schematic cross-sectional structure diagram of the connection between the air pipe section and the fin in the metal hydride hydrogen storage device disclosed in.

[0021] Description of Reference Numerals

[0022] 1 Tank 2 Hydrogen storage components

[0023] 21 air pipe 22 fin

[0024] 23 Hydrogen storage material pressed sheet 3 through hole

[0025] 4 Air vents 5 Air intake pipe

[0026] 6 Filter 7 Air pipe segment DETAILED DESCRIPTION

[0027] The following is a further detailed description of the embodiments of the present disclosure in conjunction with the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to exemplarily illustrate the principles of the present disclosure, but cannot be used to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

[0028] The present disclosure provides these embodiments to make the present disclosure thorough and complete, and to fully express the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, and not as limiting.

[0029] It should be noted that, in the description of the present disclosure, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0030] In addition, the words "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0031] It should also be noted that in the description of the present disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0032] All terms used in the present disclosure have the same meanings as those understood by those of ordinary skill in the art to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, for example, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined as such herein.

[0033] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0034] In order to overcome the problem of welding the fins to the side wall of the hydrogen storage tank in the prior art, it is necessary to fill the powdered hydrogen storage material. However, the powdered hydrogen storage material has a poor heat transfer effect, and after absorbing hydrogen, the powdered hydrogen storage material will gradually settle, gather and expand under the action of gravity, causing the tank to deform or even rupture.

[0035] Reference Figures 1 to 3 As shown, the utility model provides a metal hydride hydrogen storage device, comprising:

[0036] The tank body 1 has a gas inlet at the top thereof for hydrogen to enter;

[0037] A hydrogen storage assembly 2 is arranged in the tank body 1 and includes an air pipe 21 connected to the air inlet and extending along the axial direction of the tank body 1, a plurality of fins 22 connected to the air pipe 21 and spaced apart from each other, and a hydrogen storage material pressed sheet 23 arranged in the interlayer of the fins 22, wherein the outer periphery of the fins 22 is detachably engaged with the side wall of the tank body 1, and hydrogen storage beds are formed between adjacent fins 22, respectively, and the hydrogen storage beds are connected to the air inlet and the interlayer of the fins 22.

[0038] Specifically, the fins 22 and the tank body 1 are detachably connected so that the hydrogen storage material pressed sheet 23 can be installed in advance in the interlayer of the fins 22, and then the fins 22 and the tank body 1 are connected, which is convenient for filling the hydrogen storage material, and compared with the powdered hydrogen storage material, the hydrogen storage material pressed sheet 23 effectively improves the heat transfer effect. At the same time, multiple fins 22 can be arranged at intervals along the axial direction of the tank body 1, and multiple hydrogen storage beds are formed between adjacent fins 22, so that the hydrogen storage material pressed sheet 23 can be divided into multiple fins 22, further avoiding the concentrated stress generated by the hydrogen storage material absorbing hydrogen and expanding on the tank body 1, thereby causing the tank body 1 to be damaged, and improving the safety of the hydrogen storage tank body 1.

[0039] In some embodiments, the hydrogen storage material tablet 23 includes a hydrogen storage alloy and a heat conductive material, and the mass ratio of the hydrogen storage alloy to the heat conductive material is 1: (0.01-0.2), which can not only ensure the smooth absorption / release of hydrogen, but also conduct heat, further improving the heat transfer efficiency. In addition, the fin 22 is detachably connected to the tank body 1, making it easier to load the hydrogen storage material tablet 23.

[0040] Specifically, the hydrogen storage alloy is selected from at least one of titanium hydrogen storage alloys, zirconium hydrogen storage alloys, vanadium hydrogen storage alloys and rare earth hydrogen storage alloys; the thermal conductive material is selected from at least one of expanded graphite, thermal conductive fiber, graphite sheet, carbon nanotube, aluminum powder, copper powder, titanium powder, foamed aluminum, foamed nickel and foamed copper.

[0041] In some embodiments, the thickness of the hydrogen storage material pressed sheet 23 may be 5-50 mm to facilitate the formation of the hydrogen storage material pressed sheet 23 while reducing the stress caused by material expansion during the hydrogen absorption / desorption process to avoid damage to the tank body 1 due to expansion stress.

[0042] Wherein, in some embodiments, combined Figure 1 and Figure 2 As shown, a through hole 3 is opened in the center of the fin 22, and the air pipe 21 passes through the fin 22 through the through hole 3, and the air pipe 21 is threadedly connected to the fin 22. It can be understood that the air pipe 21 passes through the fin 22 through the through hole 3 to form a plurality of hydrogen storage beds in the tank body 1, and the air pipe 21 and the fin 22 can be threadedly connected or snap-fitted so as to adjust the number of fins 22.

[0043] Wherein, in some embodiments, Figure 2 As shown, a plurality of air holes 4 are evenly provided on the fin 22, the ratio of the total area of ​​all the air holes 4 to the area of ​​the fin 22 is (0.02-0.15):1, and the diameter of each air hole 4 is 3-20 mm.

[0044] Specifically, a plurality of air holes 4 can be evenly provided on the fin 22, which can not only reduce the weight of the fin 22, but also the air holes 4 are arranged so that hydrogen can flow through the air holes 4 and contact and react with the hydrogen storage material pressed sheet to ensure smooth absorption / desorption of hydrogen.

[0045] Wherein, in some embodiments, reference Figure 1 As shown, the side wall of the gas pipe 21 is evenly provided with openings, and the hydrogen storage bed is connected to the gas inlet through the openings. It can be understood that hydrogen is transported into the gas pipe 21 through the gas inlet, and the side wall of the gas pipe 21 can be evenly provided with openings, so that hydrogen can be evenly transported to each hydrogen storage bed in the tank body 1 through the openings for reaction.

[0046] Wherein, in some embodiments, Figure 1 As shown, the tank body 1 is a cylinder with a height of 50-600 mm and an inner diameter of 10-100 mm, and each fin 22 comprises a pair of discs adapted to the tank body 1. A sandwich is formed between adjacent pairs of discs to store the hydrogen storage material pellets 23.

[0047] Preferably, the height of the tank body 1 is 50-300 mm, and the inner diameter is 20-50 mm.

[0048] Wherein, in some embodiments, combined Figure 1 and Figure 3 As shown, the air pipe 21 includes a plurality of air pipe segments 7 extending along the axial direction of the tank body 1 and connected to adjacent fins 22 at both ends, and at least one end of each air pipe segment 7 is detachably connected to the fin 22 .

[0049] Specifically, Figure 2 As shown, the air pipe 21 is composed of a plurality of air pipe segments 7, and at least one end of each air pipe segment 7 is detachably connected to the fin 22, so as to flexibly adjust the number of fins 22 in the tank body 1 to achieve the best heat transfer effect. Figure 1 As shown, the air pipe section 7 extends along the axial direction of the tank body 1, and both ends are respectively connected to adjacent fins 22, so as to form a plurality of hydrogen storage beds at intervals in the tube body 1, so as to avoid the concentrated stress generated by the expansion of the hydrogen storage material pressed sheet 23 due to hydrogen absorption being applied to the side wall of the tank body 1, thereby causing damage to the tank body 1, thereby improving the safety of the hydrogen storage tank body 1.

[0050] Among them, in some embodiments, the fin 22 can be a copper sheet or a stainless steel sheet to ensure good thermal conductivity and improve heat transfer efficiency. And the number of fins 22 is 3-20. It can be understood that a large number of fins 22 will increase the production cost of the tank body 1, and a small number of fins 22 will lead to poor heat transfer performance. In addition, when the number of fins 22 is small, the aspect ratio of the hydrogen storage bed is too long. When the tank body 1 is placed vertically, the hydrogen storage bed unit at the bottom has a high load-bearing capacity, which increases the danger. Therefore, the number of fins 22 can be controlled to between 3 and 20, so as to control the production cost while optimizing the heat transfer performance of the metal hydride hydrogen storage device, and the number of fins 22 can be flexibly adjusted, thereby adjusting the hydrogen storage volume of the hydrogen storage bed, and it is widely used.

[0051] Wherein, in some embodiments, Figure 1 As shown, it also includes an intake pipe 5 connected to the air inlet, and a filter 6 is arranged inside the intake pipe 5, and the precision of the filter 6 is 0.5-2μm. It can be understood that the filter 6 can be arranged in the intake pipe 5, so that when the hydrogen enters the air inlet of the tank body 1 through the intake pipe 5, the impurities in the gas can be removed by the filter 6, and the precision of the filter 6 can be 0.5-2μm, thereby effectively avoiding the blockage of the air inlet, and providing a guarantee for the smooth flow of hydrogen through the air inlet to the tank body 1. Among them, the filter 6 can be a copper-based and / or stainless steel-based porous sintered body, which is mainly sintered by a powder metallurgy method.

[0052] So far, various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0053] Although some specific embodiments of the present disclosure have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present disclosure. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. A metal hydride hydrogen storage device, characterized in that: include: A tank body (1), wherein the top of the tank body (1) is provided with an air inlet for hydrogen to enter; A hydrogen storage assembly (2) is arranged in the tank body (1) and comprises an air pipe (21) connected to the air inlet and extending in the axial direction of the tank body (1), a plurality of fins (22) connected to the air pipe (21) and arranged at intervals from each other, and a hydrogen storage material pressed sheet (23) arranged in the interlayer of the fins (22), the outer periphery of the fins (22) being detachably engaged with the side wall of the tank body (1), and hydrogen storage beds are formed between adjacent fins (22), the hydrogen storage beds being connected to the air inlet and the interlayer of the fins (22).

2. The metal hydride hydrogen storage device according to claim 1, characterized in that: The thickness of the hydrogen storage material pressed sheet (23) is 5-50 mm.

3. The metal hydride hydrogen storage device according to claim 1, characterized in that: A through hole (3) is provided at the center of the fin (22); the air pipe (21) passes through the fin (22) through the through hole (3); and the air pipe (21) is threadedly connected to the fin (22).

4. The metal hydride hydrogen storage device according to claim 1, characterized in that: The fin (22) is evenly provided with a plurality of air holes (4), the ratio of the total area of ​​all the air holes (4) to the area of ​​the fin (22) is (0.02-0.15):1, and the diameter of each of the air holes (4) is 3-20 mm.

5. The metal hydride hydrogen storage device according to claim 1, characterized in that: The side wall of the gas pipe (21) is evenly provided with openings, and the hydrogen storage bed is connected to the gas inlet through the openings.

6. The metal hydride hydrogen storage device according to claim 1, characterized in that: The tank body (1) is a cylinder with a height of 50-600 mm and an inner diameter of 10-100 mm, and each of the fins (22) comprises a pair of discs matched with the tank body (1).

7. The metal hydride hydrogen storage device according to claim 1, characterized in that: The air pipe (21) comprises a plurality of air pipe segments (7) extending along the axial direction of the tank body (1) and connected to adjacent fins (22) at both ends, and at least one end of each air pipe segment (7) is detachably connected to the fin (22).

8. The metal hydride hydrogen storage device according to claim 1, characterized in that: The fins (22) are copper sheets or stainless steel sheets, and the number of the fins (22) is 3-20.

9. The metal hydride hydrogen storage device according to claim 1, characterized in that: It also includes an air intake pipe (5) connected to the air intake port, a filter (6) is arranged inside the air intake pipe (5), and the accuracy of the filter (6) is 0.5-2 μm.

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