A metal hydride hydrogen storage tank with heat exchange fins and preparation method thereof

Abstract

The present application relates to the technical field of metal hydride hydrogen storage tanks, and specifically provides a metal hydride hydrogen storage tank with heat exchange fins and a preparation method thereof, wherein the metal hydride hydrogen storage tank comprises: a hydrogen storage tank body, on which a valve is arranged; a plurality of first heat exchange fins, which are arranged in a circular array outside the hydrogen storage tank body and are integrally formed with the hydrogen storage tank body; and a hydrogen storage alloy bed body, which is filled in the hydrogen storage tank body; the metal hydride hydrogen storage tank can effectively solve the problem of contact thermal resistance between the heat conduction structure and the metal hydride hydrogen storage tank caused by the need to install a plurality of heat conduction structures on the outside of the metal hydride hydrogen storage tank by welding, fastener locking and fixing, etc., thereby effectively improving the heat transfer performance of the metal hydride hydrogen storage tank, and further effectively improving the hydrogen absorption and desorption rate of the metal hydride hydrogen storage tank.

Description

Technical Field

[0001] The present application relates to the technical field of metal hydride hydrogen storage tanks, and in particular to a metal hydride hydrogen storage tank with heat exchange fins and a preparation method thereof. Background Art

[0002] The current hydrogen storage methods are divided into: high-pressure gaseous hydrogen storage, liquid hydrogen storage and solid hydrogen storage with hydrogen storage materials as the medium. Since solid hydrogen storage has the advantages of high volume hydrogen storage density, low pressure safety and high hydrogen purity, solid hydrogen storage is an important direction for the future development of hydrogen storage technology. However, the current solid hydrogen storage technology still faces the following technical difficulties:

[0003] Heat transfer of hydrogen storage alloy bed. The hydrogen storage alloy bed needs to release a lot of heat when absorbing hydrogen and absorb a lot of heat when releasing hydrogen. Therefore, in order to make the hydrogen storage alloy bed in the metal hydride hydrogen storage tank absorb and release hydrogen smoothly and improve the response speed of hydrogen absorption and desorption, the metal hydride hydrogen storage tank must have good heat exchange performance.

[0004] In order to overcome the above technical difficulties, various researchers have made a lot of research and inventions. For example, patent documents such as CN106594518A and CN103883874A proposed adding fins, heat exchange channels and other structures to the outside of the metal hydride hydrogen storage tank. Although the above patent documents have improved the heat transfer performance of the metal hydride hydrogen storage tank to a certain extent, since these patent documents all require the installation of a number of heat-conducting structures on the outside of the metal hydride hydrogen storage tank by welding, fastener locking and fixing, etc., the existing metal hydride hydrogen storage tank has the problem of contact thermal resistance between the heat-conducting structure and the metal hydride hydrogen storage tank due to the need to install a number of heat-conducting structures on the outside of the metal hydride hydrogen storage tank by welding, fastener locking and fixing, etc., which leads to a decrease in the heat transfer performance of the metal hydride hydrogen storage tank, and then leads to a low hydrogen absorption and desorption rate of the metal hydride hydrogen storage tank.

[0005] There is currently no effective technical solution to the above problems. Summary of the invention

[0006] The purpose of the present application is to provide a metal hydride hydrogen storage tank with heat exchange fins and a preparation method thereof, which can effectively solve the problem of contact thermal resistance between the heat-conducting structure and the metal hydride hydrogen storage tank caused by the need to install several heat-conducting structures on the outside of the metal hydride hydrogen storage tank by welding, fastener locking and fixing, etc., thereby effectively improving the heat transfer performance of the metal hydride hydrogen storage tank.

[0007] In a first aspect, the present application provides a metal hydride hydrogen storage tank with heat exchange fins, comprising:

[0008] A hydrogen storage tank body, on which a valve is provided;

[0009] A plurality of first heat exchange fins are arranged in a circular array outside the hydrogen storage tank body and are integrally formed with the hydrogen storage tank body;

[0010] The hydrogen storage alloy bed is filled in the hydrogen storage tank.

[0011] The present application provides a metal oxide hydrogen storage tank with heat exchange fins, comprising a hydrogen storage tank body and a plurality of first heat exchange fins, wherein the plurality of first heat exchange fins are arranged in a circumferential array outside the hydrogen storage tank body and are integrally formed with the hydrogen storage tank body. Since the first heat exchange fins are integrally formed with the hydrogen storage tank body, no contact thermal resistance is generated between the first heat exchange fins and the hydrogen storage tank body. That is, the present application provides a metal oxide hydrogen storage tank with heat exchange fins that can solve the problem of contact thermal resistance between the heat conductive structure and the metal hydride hydrogen storage tank caused by the need to install a plurality of heat conductive structures on the outside of the metal hydride hydrogen storage tank by welding, fastener locking and fixing, etc. in the existing metal hydride hydrogen storage tank, thereby effectively improving the heat transfer performance of the metal hydride hydrogen storage tank, and further effectively improving the hydrogen absorption and desorption rate of the metal hydride hydrogen storage tank.

[0012] Optionally, the metal hydride hydrogen storage tank with heat exchange fins further includes an internal heat exchange structure, which is disposed inside the hydrogen storage tank body and is integrally formed with the hydrogen storage tank body.

[0013] This technical solution arranges an internal heat exchange structure integrally formed with the hydrogen storage tank body inside the hydrogen storage tank body. Since the internal heat exchange structure can transfer heat and no contact heat is generated between the internal heat exchange structure and the hydrogen storage tank body, this technical solution can further improve the heat transfer performance of the metal hydride hydrogen storage tank, thereby further improving the hydrogen absorption and desorption rate of the metal hydride hydrogen storage tank.

[0014] Optionally, the internal heat exchange structure includes a plurality of second heat exchange fins and a circular heat exchange column, the plurality of second heat exchange fins are arranged in a circular array between the hydrogen storage tank body and the circular heat exchange column, and the two ends of the second heat exchange fins are respectively integrally formed with the hydrogen storage tank body and the circular heat exchange column.

[0015] The second heat exchange fins, the annular heat exchange columns and the hydrogen storage tank body of the technical solution form a plurality of storage cavities, and the hydrogen storage alloy bed is filled in each storage cavity. Since the storage cavities formed by the second heat exchange fins, the annular heat exchange columns and the hydrogen storage tank body can support and separate the hydrogen storage alloy material powders, that is, the technical solution is equivalent to stacking the hydrogen storage alloy material powders in a plurality of storage cavities respectively. Therefore, the technical solution can effectively avoid the situation where the hydrogen storage alloy material powders are accumulated in local positions in the metal hydride hydrogen storage tank after long-term use, thereby effectively avoiding the situation where the hydrogen storage alloy material powders accumulated in local positions in the metal hydride hydrogen storage tank will generate additional expansion stress when further absorbing hydrogen and expanding, thereby causing damage to the metal hydride hydrogen storage tank.

[0016] Optionally, a rounded corner with uniform transition is provided between the second heat exchange fin and the hydrogen storage tank body.

[0017] This technical solution provides a uniformly transitioned fillet between the second heat exchange fin and the hydrogen storage tank body. Since the uniformly transitioned fillet can effectively alleviate stress concentration, this technical solution can avoid as much as possible the damage to the second heat exchange fin or the hydrogen storage tank body caused by stress concentration.

[0018] Optionally, the hydrogen storage tank body includes a tank mouth, a tank body and a tank bottom which are connected in sequence, the first heat exchange fin is integrally formed with the tank body, and the valve is arranged on the tank mouth.

[0019] Optionally, the metal hydride hydrogen storage tank with heat exchange fins further includes a filter plate, and the filter plate is arranged between the tank opening and the valve.

[0020] The technical solution sets a filter between the tank mouth and the valve. Since the filter can filter the hydrogen storage alloy material powder in the hydrogen, the technical solution can avoid the situation where the hydrogen storage alloy material powder enters the valve along with the hydrogen as much as possible, thereby effectively extending the service life of the valve.

[0021] Optionally, one end of the first heat exchange fin away from the hydrogen storage tank body has a bifurcated heat-conducting structure integrally formed with the first heat exchange fin.

[0022] This technical solution configures an end of the first heat exchange fin away from the hydrogen storage tank body as a bifurcated heat-conducting structure, which can increase the contact area between the first heat exchange fin and the air, thereby effectively improving the heat exchange performance of the first heat exchange fin.

[0023] In a second aspect, the present application further provides a method for preparing a metal hydride hydrogen storage tank with heat exchange fins, which is used to prepare a metal hydride hydrogen storage tank with heat exchange fins. The metal hydride hydrogen storage tank with heat exchange fins includes a hydrogen storage tank body, a circular heat exchange column, a plurality of first heat exchange fins, a plurality of second heat exchange fins and a hydrogen storage alloy bed. A valve is provided on the hydrogen storage tank body. A plurality of first heat exchange fin circumferential arrays are outside the hydrogen storage tank body and are integrally formed with the hydrogen storage tank body. A plurality of second heat exchange fin circumferential arrays are between the hydrogen storage tank body and the circular heat exchange column. Both ends of the second heat exchange fins are respectively integrally formed with the hydrogen storage tank body and the circular heat exchange column. The hydrogen storage tank body includes a tank mouth, a tank body and a tank bottom connected in sequence. The hydrogen storage alloy bed is arranged in the hydrogen storage tank body. The method for preparing a metal hydride hydrogen storage tank with heat exchange fins includes the following steps:

[0024] An aluminum rod is integrally extruded and formed using an extrusion die to form a can body including a circular heat exchange column, a first heat exchange fin, and a second heat exchange fin;

[0025] Remove the annular heat exchange columns, the first heat exchange fins and the second heat exchange fins near the two ends of the tank body;

[0026] The two ends of the tank body with part of the heat exchange structure removed are subjected to spin forming processing to form a hydrogen storage tank body with a tank mouth and a tank bottom;

[0027] Evenly filling the hydrogen storage alloy bed into the hydrogen storage tank;

[0028] A valve and a filter sheet are installed at the tank mouth to prepare a metal hydride hydrogen storage tank with heat exchange fins;

[0029] The metal hydride hydrogen storage tank with heat exchange fins is activated.

[0030] The present application provides a method for preparing a metal hydride hydrogen storage tank with heat exchange fins, which is used to prepare a metal hydride hydrogen storage tank including a hydrogen storage tank body and a plurality of first heat exchange fins, wherein the plurality of first heat exchange fins are arranged in a circumferential array outside the hydrogen storage tank body and are integrally formed with the hydrogen storage tank body. Since the first heat exchange fins are integrally formed with the hydrogen storage tank body, no contact thermal resistance is generated between the first heat exchange fins and the hydrogen storage tank body. That is, the present application provides a method for preparing a metal oxide hydrogen storage tank with heat exchange fins, which can solve the problem of contact thermal resistance between the heat conductive structure and the metal hydride hydrogen storage tank caused by the need to install a plurality of heat conductive structures on the outside of the metal hydride hydrogen storage tank by welding, fastener locking and fixing, etc. in the existing metal hydride hydrogen storage tank, thereby effectively improving the heat transfer performance of the metal hydride hydrogen storage tank, and further effectively improving the hydrogen absorption and desorption rate of the metal hydride hydrogen storage tank.

[0031] Optionally, the step of integrally extruding the aluminum rod using an extrusion die to form a can body including a circular heat exchange column, a first heat exchange fin, and a second heat exchange fin comprises:

[0032] The extrusion die and the aluminum rod are placed in a heating furnace for preheating;

[0033] Installing an extrusion die into an extruder and placing an aluminum rod at a raw material inlet of the extruder, and extruding the aluminum rod by using the extrusion die to form a can body including a circular heat exchange column, a first heat exchange fin and a second heat exchange fin;

[0034] After the can body is cooled, the can body is straightened using a stretching machine or a straightening machine;

[0035] Use a sawing machine to saw the straightened can body;

[0036] The sawn can body is sent to the aging furnace for aging treatment.

[0037] Optionally, the step of performing spin forming on both ends of the tank body from which part of the heat exchange structure is removed to form a hydrogen storage tank body having a tank mouth and a tank bottom includes:

[0038] Determine the clamping position according to the closing length of the can body with part of the heat exchange structure removed, and feed the can body with part of the heat exchange structure removed to the spinning machine according to the clamping position;

[0039] Use a heating furnace and a heating gun to heat the mold used in spinning and the can body with some heat exchange structures removed to 280-320°C;

[0040] The spindle speed, axial feed distance, number of rotations of the rotary wheel and the angle of each rotation of the rotary wheel are set according to the diameter of the tank body with part of the heat exchange structure removed and the shape of the tank mouth. The set spinning machine is used to spin the two ends of the tank body with part of the heat exchange structure removed to form a hydrogen storage tank body with a tank mouth and a tank bottom.

[0041] As can be seen from the above, the present application provides a metal hydride hydrogen storage tank with heat exchange fins and a preparation method thereof, comprising a hydrogen storage tank body and a plurality of first heat exchange fins, wherein the plurality of first heat exchange fins are arranged in a circumferential array outside the hydrogen storage tank body and are integrally formed with the hydrogen storage tank body. Since the first heat exchange fins are integrally formed with the hydrogen storage tank body, no contact thermal resistance is generated between the first heat exchange fins and the hydrogen storage tank body. That is, the present application provides a metal oxide hydrogen storage tank with heat exchange fins that can solve the problem of contact thermal resistance between the heat conductive structure and the metal hydride hydrogen storage tank caused by the need to install a plurality of heat conductive structures on the outside of the metal hydride hydrogen storage tank by welding, fastener locking and fixing, etc. in the existing metal hydride hydrogen storage tank, thereby effectively improving the heat transfer performance of the metal hydride hydrogen storage tank, and further effectively improving the hydrogen absorption and desorption rate of the metal hydride hydrogen storage tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 A schematic structural diagram of a metal hydride hydrogen storage tank with heat exchange fins provided in an embodiment of the present application.

[0043] Figure 2 A schematic diagram of the cross-sectional structure along the vertical direction of a metal hydride hydrogen storage tank with heat exchange fins provided in an embodiment of the present application.

[0044] Figure 3 For along Figure 2 Schematic diagram of the cross-sectional structure of the AA section line.

[0045] Figure 4 A flow chart of a method for preparing a metal hydride hydrogen storage tank with heat exchange fins provided in an embodiment of the present application.

[0046] Figure 5 A schematic diagram of a method for preparing a metal hydride hydrogen storage tank with heat exchange fins provided in an embodiment of the present application.

[0047] Figure numerals: 1. hydrogen storage tank body; 2. valve; 3. first heat exchange fin; 4. hydrogen storage alloy bed; 5. filter plate; 6. internal heat exchange structure; 61. second heat exchange fin; 62. annular heat exchange column; 7. bifurcated heat conduction structure. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0049] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0050] First, as Figure 1-Figure 3 As shown, the present application provides a metal hydride hydrogen storage tank with heat exchange fins, which includes:

[0051] A hydrogen storage tank body 1, on which a valve 2 is provided;

[0052] A plurality of first heat exchange fins 3 are arranged in a circular array outside the hydrogen storage tank body 1 and are integrally formed with the hydrogen storage tank body 1;

[0053] The hydrogen storage alloy bed 4 is filled in the hydrogen storage tank 1 .

[0054] Among them, the metal hydride hydrogen storage tank is a container for loading hydrogen storage alloy materials (which can be called metal hydride) to absorb and release hydrogen. The hydrogen storage tank body 1 of this embodiment is prepared by an integrated extrusion molding device and a spin forming device. Specifically, the cross-sectional shape of the hydrogen storage tank body 1 of this embodiment is circular, and a valve 2 is provided on the hydrogen storage tank body 1. This embodiment can adjust the absorption rate or output rate of hydrogen by adjusting the opening of the valve 2. The material of the hydrogen storage tank body 1 of this embodiment is a metal material. Preferably, since aluminum alloy has the advantages of good thermal conductivity, high strength and light weight, the material of the hydrogen storage tank body 1 of this embodiment is aluminum alloy. More preferably, the material of the hydrogen storage tank body 1 of this embodiment is 6063-T6 aluminum alloy or 6061-T6 aluminum alloy. The metal hydride hydrogen storage tank with heat exchange fins of this embodiment includes a plurality of first heat exchange fins 3, which are arranged in a circumferential array outside the hydrogen storage tank body 1 and are integrally formed with the hydrogen storage tank body 1, that is, the hydrogen storage tank body 1 and the first heat exchange fins 3 of this embodiment are prepared by an integral extrusion molding device in a one-piece extrusion molding process. It should be understood that since the first heat exchange fins 3 are integrally formed with the hydrogen storage tank body 1, the material of the first heat exchange fins 3 of this embodiment is the same as that of the hydrogen storage tank body 1. The hydrogen storage alloy bed 4 of this embodiment is a uniform mixture of hydrogen storage alloy materials and additives, that is, the hydrogen storage alloy bed 4 of this embodiment is equivalent to a carrier of hydrogen storage alloy materials and additives, and the hydrogen storage alloy bed 4 of this embodiment is filled in the hydrogen storage tank body 1. Specifically, the hydrogen storage alloy material can be rare earth AB5 type, titanium AB2 type and AB type, titanium vanadium solid solution, etc.

[0055] A metal oxide hydrogen storage tank with heat exchange fins provided in the present application comprises a hydrogen storage tank body 1 and a plurality of first heat exchange fins 3, wherein the plurality of first heat exchange fins 3 are arranged in a circumferential array outside the hydrogen storage tank body 1 and are integrally formed with the hydrogen storage tank body 1. Since the first heat exchange fins 3 are integrally formed with the hydrogen storage tank body 1, no contact thermal resistance is generated between the first heat exchange fins 3 and the hydrogen storage tank body 1. That is, the metal oxide hydrogen storage tank with heat exchange fins provided in the present application can solve the problem of contact thermal resistance between the heat conductive structure and the metal hydride hydrogen storage tank caused by the need to install a plurality of heat conductive structures on the outside of the metal hydride hydrogen storage tank by welding, fastener locking and fixing, etc. in the existing metal hydride hydrogen storage tank, thereby effectively improving the heat transfer performance of the metal hydride hydrogen storage tank, and further effectively improving the hydrogen absorption and desorption rate of the metal hydride hydrogen storage tank. In addition, the first heat exchange fin 3 integrally formed with the hydrogen storage tank body 1 can serve as a reinforcing structure of the hydrogen storage tank body 1, and installing the heat conduction structure in the metal hydride hydrogen storage tank by welding, fastener locking and fixing, etc. will reduce the overall strength of the metal hydride hydrogen storage tank. Therefore, compared with the existing metal hydride hydrogen storage tank, this embodiment can also effectively improve the structural stability and pressure bearing capacity of the metal oxide hydrogen storage tank. It should be understood that since the hydrogen storage tank body 1 and the first heat exchange fin 3 of this example are integrally formed, after the production of the hydrogen storage tank body 1 is completed, this embodiment does not need to install the first heat exchange fin 3 on the outside of the hydrogen storage tank body 1, thereby effectively simplifying the preparation process of the metal hydride hydrogen storage tank and improving the preparation efficiency of the metal hydride hydrogen storage tank.

[0056] In some embodiments, the metal hydride hydrogen storage tank with heat exchange fins further includes an internal heat exchange structure 6, which is disposed in the hydrogen storage tank body 1 and is integrally formed with the hydrogen storage tank body 1. The internal heat exchange structure 6 of this embodiment may be a heat exchanger and a heat exchange fin, etc., which can conduct heat. The internal heat exchange structure 6 is disposed in the hydrogen storage tank body 1 and is integrally formed with the hydrogen storage tank body 1, that is, the hydrogen storage tank body 1, the first heat exchange fin 3 and the internal heat exchange structure 6 of this embodiment are prepared by an integral extrusion molding device in a one-piece extrusion molding process. It should be understood that since the internal heat exchange structure 6 of this embodiment is integrally formed with the hydrogen storage tank body 1, no contact thermal resistance is generated between the internal heat exchange structure 6 of this embodiment and the hydrogen storage tank body 1. In this embodiment, an internal heat exchange structure 6 integrally formed with the hydrogen storage tank body 1 is arranged inside the hydrogen storage tank body 1. Since the internal heat exchange structure 6 can transfer heat and no contact heat is generated between the internal heat exchange structure 6 and the hydrogen storage tank body 1, this embodiment can further improve the heat transfer performance of the metal hydride hydrogen storage tank, thereby further improving the hydrogen absorption and desorption rate of the metal hydride hydrogen storage tank.

[0057] In some embodiments, the internal heat exchange structure 6 includes a plurality of second heat exchange fins 61 and a circular heat exchange column 62, wherein the plurality of second heat exchange fins 61 are arranged in a circular array between the hydrogen storage tank body 1 and the circular heat exchange column 62, and the two ends of the second heat exchange fins 61 are integrally formed with the hydrogen storage tank body 1 and the circular heat exchange column 62 respectively. The second heat exchange fins 61, the annular heat exchange column 62 and the hydrogen storage tank body 1 of this embodiment enclose a plurality of storage chambers, and the hydrogen storage alloy bed 4 is filled in each storage chamber. Since the storage chambers enclosed by the second heat exchange fins 61, the annular heat exchange column 62 and the hydrogen storage tank body 1 can support and separate the hydrogen storage alloy material powder, that is, this embodiment is equivalent to stacking the hydrogen storage alloy material powder in a plurality of storage chambers respectively, so this embodiment can effectively avoid the situation where the hydrogen storage alloy material powder is accumulated in a local position in the metal hydride hydrogen storage tank after long-term use, thereby effectively avoiding the situation where the hydrogen storage alloy material powder accumulated in a local position in the metal hydride hydrogen storage tank generates additional expansion stress when further hydrogen absorption expands, causing damage to the metal hydride hydrogen storage tank. In addition, the second heat exchange fins 61 and the annular heat exchange column 62 integrally formed with the hydrogen storage tank body 1 of this embodiment can also serve as a reinforcing structure of the hydrogen storage tank body 1, so this embodiment can further improve the structural stability and pressure bearing capacity of the metal oxide hydrogen storage tank.

[0058] In some embodiments, a uniformly transitioned fillet is provided between the second heat exchange fin 61 and the hydrogen storage tank body 1. In this embodiment, a uniformly transitioned fillet is provided between the second heat exchange fin 61 and the hydrogen storage tank body 1. Since the uniformly transitioned fillet can effectively relieve stress concentration, this embodiment can avoid the situation where the second heat exchange fin 61 or the hydrogen storage tank body 1 is damaged due to stress concentration as much as possible.

[0059] In some embodiments, a uniformly transitioned fillet is provided between the first heat exchange fin 3 and the hydrogen storage tank body 1. In this embodiment, a uniformly transitioned fillet is provided between the first heat exchange fin 3 and the hydrogen storage tank body 1. Since the uniformly transitioned fillet can effectively relieve stress concentration, this embodiment can avoid the situation where the first heat exchange fin 3 or the hydrogen storage tank body 1 is damaged due to stress concentration as much as possible.

[0060] In some embodiments, the hydrogen storage tank body 1 includes a tank mouth, a tank body and a tank bottom connected in sequence, the first heat exchange fin 3 is integrally formed with the tank body, and the valve 2 is arranged on the tank mouth. The hydrogen storage tank body 1 of this embodiment includes a tank mouth, a tank body and a tank bottom, and the tank mouth, the tank body and the tank bottom are prepared by an integrated extrusion molding device and a spin forming device, so the tank mouth, the tank body and the tank bottom of this embodiment will not generate contact thermal resistance, thereby effectively improving the heat transfer performance of the hydrogen storage tank body 1. The first heat exchange fin 3 and the second heat exchange fin 61 of this embodiment are both integrally formed with the tank body.

[0061] In some embodiments, the metal hydride hydrogen storage tank with heat exchange fins further includes a filter 5, which is disposed between the tank opening and the valve 2. Specifically, the filter 5 of this embodiment is sintered by a stainless steel or copper alloy powder metallurgy method, and the filtering accuracy of the filter 5 of this embodiment is less than 3 microns. In this embodiment, the filter 5 is disposed between the tank opening and the valve 2. Since the filter 5 can filter the hydrogen storage alloy material powder in the hydrogen, this embodiment can avoid the situation where the hydrogen storage alloy material powder enters the valve 2 along with the hydrogen as much as possible, thereby effectively extending the service life of the valve 2.

[0062] In some embodiments, the end of the first heat exchange fin 3 away from the hydrogen storage tank body 1 has a bifurcated heat conductive structure 7 integrally formed with the first heat exchange fin 3. Specifically, the cross section of the bifurcated heat conductive structure 7 of this embodiment is a symmetrical three-pronged structure (refer to Figure 3 ), in this embodiment, the end of the first heat exchange fin 3 away from the hydrogen storage tank body 1 is set as a forked heat conductive structure 7, and the forked heat conductive structure 7 can increase the contact area between the first heat exchange fin 3 and the air, thereby effectively improving the heat exchange performance of the first heat exchange fin 3.

[0063] In some embodiments, the length of the second heat exchange fin 61 and the annular heat exchange column 62 is less than the length of the tank body. Since the length of the second heat exchange fin 61 and the annular heat exchange column 62 is less than the length of the tank body, the bottoms and tops of the multiple storage cavities formed by the second heat exchange fin 61, the annular heat exchange column 62 and the hydrogen storage tank body 1 are interconnected.

[0064] In some embodiments, the ratio of the number of the first heat exchange fins 3 to the number of the second heat exchange fins 61 is 2.5:1-3.5:1. When the ratio of the number of the first heat exchange fins 3 to the number of the second heat exchange fins 61 is 2.5:1-3.5:1, the metal hydride hydrogen storage tank has good heat transfer performance and includes a suitable number of first heat exchange fins 3 and second heat exchange fins 61, so this embodiment can effectively avoid the problem of high production cost and difficulty of the metal hydride hydrogen storage tank due to the excessive number of the first heat exchange fins 3 and the second heat exchange fins 61, and the problem of poor heat transfer performance of the metal hydride hydrogen storage tank due to the small number of the first heat exchange fins 3 and the second heat exchange fins 61. It should be understood that since the number of the first heat exchange fins 3 is greater than the number of the second heat exchange fins 61, the density of the first heat exchange fins 3 is greater than the density of the second heat exchange fins 61. Preferably, the number of the first heat exchange fins 3 of this embodiment is 30, the number of the second heat exchange fins 61 is 10, and the ratio of the number of the first heat exchange fins 3 to the number of the second heat exchange fins 61 is 3:1. At this time, the heat transfer performance of the metal hydride hydrogen storage tank is the best.

[0065] In some embodiments, the thickness of the first heat exchange fin 3 gradually decreases in the direction away from the hydrogen storage tank body 1. Since the heat received by the end of the first heat exchange fin 3 close to the hydrogen storage tank body 1 is greater than the heat received by the end away from the hydrogen storage tank body 1 in a unit time, this embodiment is equivalent to setting the first heat exchange fin 3 to gradually become thinner in the direction away from the hydrogen storage tank body 1, thereby effectively reducing the production cost of the first heat exchange fin 3 while ensuring the heat exchange performance of the first heat exchange fin 3.

[0066] In some embodiments, the distance between the two sides of the forked heat-conducting structure 7 of the first heat-exchange fin 3 is greater than the distance between the forked heat-conducting structures 7 of the adjacent first heat-exchange fins 3. Since the distance between the two sides of the forked heat-conducting structure 7 of the first heat-exchange fin 3 is greater than the distance between the forked heat-conducting structures 7 of the adjacent first heat-exchange fins 3, this embodiment is equivalent to equipping each fork of the forked heat-conducting structure 7 with a sufficiently large heat-exchange space, thereby effectively improving the heat-exchange effect of the forked heat-conducting structure 7. Preferably, the distance between the forked heat-conducting structures 7 on adjacent first heat-exchange fins 3 is greater than or equal to the distance between the adjacent forked ends of the forked heat-conducting structure 7, so that the heat released by the adjacent first heat-exchange fins 3 can be released smoothly or the heat absorbed by the adjacent first heat-exchange fins 3 can be supplemented smoothly.

[0067] In some embodiments, the ends of the bifurcated heat-conducting structures 7 of all the first heat exchange fins 3 are located on a cylindrical surface, and the ratio of the diameter of the cylindrical surface to the diameter of the hydrogen storage tank body 1 is 2:1-3:1. When the ratio of the diameter of the cylindrical surface to the diameter of the hydrogen storage tank body 1 is 2:1-3:1, the first heat exchange fins 3 and the bifurcated heat-conducting structures 7 have a sufficiently large heat dissipation area so that the first heat exchange fins 3 and the bifurcated heat-conducting structures 7 dissipate heat evenly, and this embodiment sets the ratio of the diameter of the cylindrical surface to the diameter of the hydrogen storage tank body 1 to 2:1-3:1, which can make the first heat exchange fins 3 have sufficient strength, thereby effectively improving the support stability and structural stability of the hydrogen storage tank body 1.

[0068] As can be seen from the above, a metal hydride hydrogen storage tank with heat exchange fins provided in the present application comprises a hydrogen storage tank body 1 and a plurality of first heat exchange fins 3, wherein the plurality of first heat exchange fins 3 are arranged in a circular array outside the hydrogen storage tank body 1 and are integrally formed with the hydrogen storage tank body 1. Since the first heat exchange fins 3 are integrally formed with the hydrogen storage tank body 1, no contact thermal resistance is generated between the first heat exchange fins 3 and the hydrogen storage tank body 1. That is, a metal oxide hydrogen storage tank with heat exchange fins provided in the present application can solve the problem of contact thermal resistance between the heat conductive structure and the metal hydride hydrogen storage tank caused by the need to install a plurality of heat conductive structures on the outside of the metal hydride hydrogen storage tank by welding, fastener locking and fixing, etc. in the existing metal hydride hydrogen storage tank, thereby effectively improving the heat transfer performance of the metal hydride hydrogen storage tank, and further effectively improving the hydrogen absorption and desorption rate of the metal hydride hydrogen storage tank.

[0069] Second, as Figure 4 As shown, the present application also provides a method for preparing a metal hydride hydrogen storage tank with heat exchange fins, which is used to prepare a metal hydride hydrogen storage tank with heat exchange fins. The metal hydride hydrogen storage tank with heat exchange fins includes a hydrogen storage tank body 1, a circular heat exchange column 62, a plurality of first heat exchange fins 3, a plurality of second heat exchange fins 61 and a hydrogen storage alloy bed 4. A valve 2 is provided on the hydrogen storage tank body 1. A plurality of first heat exchange fins 3 are arranged in a circular array outside the hydrogen storage tank body 1 and are integrally formed with the hydrogen storage tank body 1. A plurality of second heat exchange fins 61 are arranged in a circular array between the hydrogen storage tank body 1 and the circular heat exchange column 62. The two ends of the second heat exchange fins 61 are respectively integrally formed with the hydrogen storage tank body 1 and the circular heat exchange column 62. The hydrogen storage tank body 1 includes a tank mouth, a tank body and a tank bottom connected in sequence. The hydrogen storage alloy bed 4 is arranged in the hydrogen storage tank body 1. The method for preparing a metal hydride hydrogen storage tank with heat exchange fins includes the following steps:

[0070] S1, using an extrusion die to integrally extrude the aluminum rod to form a can body including a circular heat exchange column 62, a first heat exchange fin 3 and a second heat exchange fin 61 (refer to Figure 5 a in (a);

[0071] S2, remove the annular heat exchange column 62, the first heat exchange fin 3 and the second heat exchange fin 61 near the two ends of the tank body (refer to Figure 5 b);

[0072] S3, spin forming is performed on both ends of the tank body with part of the heat exchange structure removed to form a hydrogen storage tank body 1 having a tank mouth and a tank bottom (reference Figure 5 c);

[0073] S4, evenly filling the hydrogen storage alloy bed 4 into the hydrogen storage tank 1;

[0074] S5. Install valve 2 and filter 5 at the tank mouth (refer to Figure 5 d) in order to prepare a metal hydride hydrogen storage tank with heat exchange fins;

[0075] S6. Activate the metal hydride hydrogen storage tank with heat exchange fins.

[0076] The embodiment of the present application provides a method for preparing a metal hydride hydrogen storage tank with heat exchange fins, and the preparation method is used to prepare a metal hydride hydrogen storage tank with heat exchange fins as provided in the first aspect above. The specific process of step S6 for activating the metal hydride hydrogen storage tank is: absorbing and releasing hydrogen once on the metal hydride hydrogen storage tank. The working principle of the method for preparing a metal hydride hydrogen storage tank with heat exchange fins provided in the embodiment of the present application is the same as the working principle of the metal hydride hydrogen storage tank with heat exchange fins provided in the first aspect above, and will not be discussed in detail here.

[0077] In some embodiments, step S1 includes:

[0078] S11, placing the extrusion die and the aluminum rod in a heating furnace for preheating;

[0079] S12, installing the extrusion die into the extruder and placing the aluminum rod at the raw material inlet of the extruder, so as to extrude the aluminum rod by using the extrusion die to form a can body including the annular heat exchange column, the first heat exchange fin 3 and the second heat exchange fin 61;

[0080] S13, after the can body is cooled, straightening the can body by using a stretching machine or a straightening machine;

[0081] S14, sawing the straightened can body by using a sawing machine;

[0082] S15, sending the sawn can body to an aging furnace for aging treatment.

[0083] Among them, step S12 needs to adjust the extrusion rate of the extruder according to the specific material of the aluminum rod, the geometric shape, size and / or surface state of the product. For example, if the material of the aluminum rod is 6063-T6 aluminum alloy, the extrusion rate of the extruder is 15m / min, and if the material of the aluminum rod is 6061-T6 aluminum alloy, the extrusion rate of the extruder is 8m / min. The aging treatment of step S15 is: increase the temperature of the aging furnace so that the aging temperature of the aging furnace reaches 200°C, and keep it warm for more than 2 hours.

[0084] In some embodiments, step S3 includes:

[0085] S31, determining a clamping position according to the closing length of the can body with a portion of the heat exchange structure removed, and feeding the can body with a portion of the heat exchange structure removed to a spinning machine according to the clamping position;

[0086] S32, using a heating furnace and a heating gun to heat the mold used in the spinning process and the can body with part of the heat exchange structure removed to 280-320° C.;

[0087] S33. According to the diameter of the tank body with part of the heat exchange structure removed and the shape of the tank mouth, the spindle speed, axial feed distance, number of times the rotary wheel swings and the angle of each rotary wheel swing of the spinning machine are set, and the two ends of the tank body with part of the heat exchange structure removed are spun using the set spinning machine to form a hydrogen storage tank body 1 with a tank mouth and a tank bottom.

[0088] Among them, step S33 needs to set the spindle speed, axial feed distance, number of times of the rotary wheel swing angle and the angle of each rotary wheel swing angle of the spinning machine according to the diameter of the can body from which part of the heat exchange structure is removed and the shape of the can mouth. Specifically, the diameter of the can body of the present application is 164mm, the spindle speed of the spinning machine is 400-500rpm, the axial feed distance of the spinning machine is 3-10mm, and the rotary wheel swing angle is 0°-90°.

[0089] In some embodiments, step S3 further includes the following steps performed after step S33:

[0090] S34, cutting and dimension inspection of the spin-formed hydrogen storage tank body 1.

[0091] As can be seen from the above, the present application provides a method for preparing a metal hydride hydrogen storage tank with heat exchange fins, which is used to prepare a metal hydride hydrogen storage tank including a hydrogen storage tank body 1 and a plurality of first heat exchange fins 3, wherein the plurality of first heat exchange fins 3 are arranged in a circular array outside the hydrogen storage tank body 1 and are integrally formed with the hydrogen storage tank body 1. Since the first heat exchange fins 3 are integrally formed with the hydrogen storage tank body 1, no contact thermal resistance is generated between the first heat exchange fins 3 and the hydrogen storage tank body 1. That is, the present application provides a method for preparing a metal oxide hydrogen storage tank with heat exchange fins, which can solve the problem of contact thermal resistance between the heat conductive structure and the metal hydride hydrogen storage tank due to the need to install a plurality of heat conductive structures on the outside of the metal hydride hydrogen storage tank by welding, fastener locking and fixing, etc. in the existing metal hydride hydrogen storage tank, thereby effectively improving the heat transfer performance of the metal hydride hydrogen storage tank, and further effectively improving the hydrogen absorption and desorption rate of the metal hydride hydrogen storage tank.

[0092] As can be seen from the above, the present application provides a metal hydride hydrogen storage tank with heat exchange fins and a preparation method thereof, comprising a hydrogen storage tank body 1 and a plurality of first heat exchange fins 3, wherein the plurality of first heat exchange fins 3 are arranged in a circular array outside the hydrogen storage tank body 1 and are integrally formed with the hydrogen storage tank body 1. Since the first heat exchange fins 3 are integrally formed with the hydrogen storage tank body 1, no contact thermal resistance is generated between the first heat exchange fins 3 and the hydrogen storage tank body 1, that is, the present application provides a metal oxide hydrogen storage tank with heat exchange fins that can solve the problem of contact thermal resistance between the heat conductive structure and the metal hydride hydrogen storage tank caused by the need to install a plurality of heat conductive structures on the outside of the metal hydride hydrogen storage tank by welding, fastener locking and fixing, etc. in the existing metal hydride hydrogen storage tank, thereby effectively improving the heat transfer performance of the metal hydride hydrogen storage tank, and further effectively improving the hydrogen absorption and desorption rate of the metal hydride hydrogen storage tank.

[0093] In this document, relational terms such as first and second, etc. are used merely to distinguish one entity or operation from another entity or operation, but do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0094] The above description is only an embodiment of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for preparing a metal hydride hydrogen storage tank with heat exchange fins, which is used to prepare a metal hydride hydrogen storage tank with heat exchange fins, characterized in that: The metal hydride hydrogen storage tank with heat exchange fins comprises a hydrogen storage tank body, a circular heat exchange column, a plurality of first heat exchange fins, a plurality of second heat exchange fins and a hydrogen storage alloy bed, the hydrogen storage tank body is provided with a valve, a plurality of first heat exchange fin circumferential arrays are outside the hydrogen storage tank body and are integrally formed with the hydrogen storage tank body, a plurality of second heat exchange fin circumferential arrays are between the hydrogen storage tank body and the circular heat exchange column, two ends of the second heat exchange fins are respectively integrally formed with the hydrogen storage tank body and the circular heat exchange column, the hydrogen storage tank body comprises a tank mouth, a tank body and a tank bottom connected in sequence, the hydrogen storage alloy bed is arranged in the hydrogen storage tank body, and the preparation method of the metal hydride hydrogen storage tank with heat exchange fins comprises the following steps: An aluminum rod is integrally extruded using an extrusion die to form a can body including the annular heat exchange column, the first heat exchange fins, and the second heat exchange fins; Remove the annular heat exchange column, the first heat exchange fin and the second heat exchange fin near the two ends of the tank body; Performing spin forming on both ends of the tank body from which part of the heat exchange structure is removed, so as to form a hydrogen storage tank body having the tank mouth and the tank bottom; The hydrogen storage alloy bed is uniformly filled into the hydrogen storage tank; Installing the valve and filter at the tank mouth to prepare the metal hydride hydrogen storage tank with heat exchange fins; Performing activation treatment on the metal hydride hydrogen storage tank with heat exchange fins; The step of integrally extruding the aluminum rod using an extrusion die to form a can body including the annular heat exchange column, the first heat exchange fins and the second heat exchange fins comprises: The extrusion die and the aluminum rod are placed in a heating furnace for preheating; Installing an extrusion die into an extruder and placing an aluminum rod at a raw material inlet of the extruder, so as to extrude the aluminum rod using the extrusion die to form a can body including the annular heat exchange column, the first heat exchange fins and the second heat exchange fins; After the can body is cooled, the can body is straightened using a stretching machine or a straightening machine; Use a sawing machine to saw the straightened can body; The sawn can body is sent to the aging furnace for aging treatment.

2. The method for preparing a metal hydride hydrogen storage tank with heat exchange fins according to claim 1, characterized in that: The step of performing spin forming on both ends of the tank body with part of the heat exchange structure removed to form a hydrogen storage tank body having the tank mouth and the tank bottom comprises: Determine the clamping position according to the closing length of the can body with part of the heat exchange structure removed, and feed the can body with part of the heat exchange structure removed to the spinning machine according to the clamping position; Use a heating furnace and a heating gun to heat the mold used in spinning and the can body with some heat exchange structures removed to 280-320°C; The spindle speed, axial feed distance, number of times the wheel swings and the angle of each wheel swing are set according to the diameter of the tank body with part of the heat exchange structure removed and the shape of the tank mouth. The two ends of the tank body with part of the heat exchange structure removed are spun using the set spinning machine to form a hydrogen storage tank body with the tank mouth and the tank bottom.

3. A metal hydride hydrogen storage tank with heat exchange fins, characterized in that: The metal hydride hydrogen storage tank with heat exchange fins is manufactured by the method for preparing the metal hydride hydrogen storage tank with heat exchange fins according to any one of claims 1 to 2, and the metal hydride hydrogen storage tank with heat exchange fins comprises: A hydrogen storage tank body, on which a valve is provided; A plurality of first heat exchange fins, arranged in a circular array outside the hydrogen storage tank body and integrally formed with the hydrogen storage tank body; The hydrogen storage alloy bed is filled in the hydrogen storage tank.

4. The metal hydride hydrogen storage tank with heat exchange fins according to claim 3, characterized in that: The metal hydride hydrogen storage tank with heat exchange fins further comprises an internal heat exchange structure, which is disposed in the hydrogen storage tank body and is integrally formed with the hydrogen storage tank body.

5. The metal hydride hydrogen storage tank with heat exchange fins according to claim 4, characterized in that: The internal heat exchange structure includes a plurality of second heat exchange fins and a circular heat exchange column. The plurality of second heat exchange fins are arranged in a circular array between the hydrogen storage tank body and the circular heat exchange column. Both ends of the second heat exchange fins are integrally formed with the hydrogen storage tank body and the circular heat exchange column respectively.

6. The metal hydride hydrogen storage tank with heat exchange fins according to claim 5, characterized in that: A rounded corner with uniform transition is arranged between the second heat exchange fin and the hydrogen storage tank body.

7. The metal hydride hydrogen storage tank with heat exchange fins according to claim 3, characterized in that: The hydrogen storage tank body comprises a tank mouth, a tank body and a tank bottom which are connected in sequence, the first heat exchange fin is integrally formed with the tank body, and the valve is arranged on the tank mouth.

8. The metal hydride hydrogen storage tank with heat exchange fins according to claim 7, characterized in that: The metal hydride hydrogen storage tank with heat exchange fins also includes a filter plate, which is arranged between the tank port and the valve.

9. The metal hydride hydrogen storage tank with heat exchange fins according to claim 3, characterized in that: One end of the first heat exchange fin away from the hydrogen storage tank body has a bifurcated heat conduction structure integrally formed with the first heat exchange fin.

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