Hydrogen storage device

Abstract

The utility model relates to the technical field of hydrogen storage, in particular to a hydrogen storage device which comprises a tank body, a first conveying pipe, a heat exchange box and a second conveying pipe, the heat exchange box is arranged in the tank body, and the heat exchange box extends in the circumferential direction of the tank body; a liquid inlet of the heat exchange box can be communicated with a liquid supply end outside the tank body through a first conveying pipe, and a liquid outlet of the heat exchange box can be communicated with a backflow end outside the tank body through a second conveying pipe. It can be seen that a novel heat exchange structure is adopted in the tank body, the structure that the heat exchange box is matched with the heat exchange pipe is adopted, and heat conduction protruding parts such as heat conduction pieces are arranged on the outer wall of the heat exchange box, so that the heat exchange area is increased, and the heat exchange efficiency is improved; the structural strength of the hydrogen storage device can be improved, the safety protection and explosion-proof effects are achieved, the pressure relief valve can relieve pressure in the cavity between the outer tank body and the inner tank body, and the hydrogen storage device is safer and more reliable.

Description

TECHNICAL FIELD

[0001] The application relates to the hydrogen storage technology field, in particular to a hydrogen storage device. BACKGROUND

[0002] At present, with the continuous development of hydrogen energy application, the hydrogen storage device becomes a key link. At present, the common hydrogen storage device is mostly high-capacity magnesium-based solid-state hydrogen storage material as a hydrogen storage medium, has a pressure container filled with magnesium alloy hydrogen storage material, a hydrogen charging and discharging control and metering module, a safety interlocking module, and can be used for hydrogen storage of hydrogen filling stations and large-scale hydrogen use scenarios. However, the existing hydrogen storage device has defects in heat exchange, such as limited contact area of single heat exchange pipeline and solid-state hydrogen storage material, which leads to low heat exchange efficiency and affects the hydrogen storage and discharge speed, so it is necessary to develop a hydrogen storage device capable of improving the heat exchange efficiency. CONTENT OF THE UTILITY MODEL

[0003] The application aims to provide a hydrogen storage device, which solves the technical problem of the necessity of developing a hydrogen storage device capable of improving the heat exchange efficiency to some extent.

[0004] The application provides a hydrogen storage device, which comprises a tank body, a first conveying pipe, a heat exchange box and a second conveying pipe; wherein the heat exchange box is arranged in the tank body and extends along the circumferential direction of the tank body; the liquid inlet of the heat exchange box is connected with the liquid supply end outside the tank body through the first conveying pipe, and the liquid outlet of the heat exchange box is connected with the backflow end outside the tank body through the second conveying pipe.

[0005] In the above technical solution, further, the number of the heat exchange boxes is multiple, and the heat exchange boxes are sequentially and spacedly arranged along the circumferential direction perpendicular to the length direction of the tank body.

[0006] In any of the above technical solutions, further, the hydrogen storage device further comprises a converging branch pipe and a joint; wherein along the length direction of the tank body, the converging branch pipe is arranged inside one end of the tank body; any of the heat exchange boxes is provided with the converging branch pipe, and one end of the multiple converging branch pipes converges together and is connected.

[0007] In any of the above technical solutions, further, the multiple heat exchange boxes surround to form a mounting cavity, the hydrogen storage device further comprises a heat exchange pipe, and the heat exchange pipe is arranged in the mounting cavity or outside the mounting cavity, and the heat exchange pipe is connected with the converging branch pipe.

[0008] In any of the above technical solutions, further, the number of heat exchange tubes is multiple, and the heat exchange tubes are sequentially and spacedly arranged along the circumferential direction of the tank body perpendicular to the length direction of the tank body.

[0009] In any of the above technical solutions, further, the number of heat exchange boxes is multiple, and the heat exchange boxes are sequentially and spacedly arranged along the length direction of the tank body; the hydrogen storage device further comprises a connecting pipe, and any two adjacent heat exchange boxes are connected through the connecting pipe along the length direction of the tank body.

[0010] In any of the above technical solutions, further, the outer wall of the heat exchange box is provided with a heat-conducting protruding part.

[0011] In any of the above technical solutions, further, the heat exchange box is a circular-arc box body.

[0012] In any of the above technical solutions, further, the hydrogen storage device further comprises a first fixing seat and a second fixing seat; wherein, along the length direction of the tank body, the first fixing seat and the second fixing seat are respectively fixed to the inside of the two ends of the tank body; the first fixing seat is formed with a first mounting through hole, and the first conveying pipe is mounted in the first mounting through hole; the second fixing seat is formed with a second mounting through hole, and the second conveying pipe is mounted in the second mounting through hole.

[0013] In any of the above technical solutions, further, the tank body comprises an inner tank body and an outer tank body, and the inner tank body is arranged inside the outer tank body, and the heat exchange box is arranged inside the inner tank body.

[0014] In any of the above technical solutions, further, the hydrogen storage device further comprises a pressure relief valve, and the pressure relief valve is mounted on the outer tank body, and the accommodating cavity between the inner tank body and the outer tank body can be connected with the outside of the outer tank body through the pressure relief valve.

[0015] In any of the above technical solutions, further, the inner tank body is a tank body with a hollow inside and open at both ends along the length direction thereof, the outer tank body is a tank body with a hollow inside and closed at both ends along the length direction thereof, the length directions of the inner tank body and the outer tank body are the same, and the two end portions of the inner tank body along the length direction thereof abut against the two end portions of the outer tank body along the length direction thereof.

[0016] In any of the above technical solutions, further, the hydrogen storage device further comprises a hydrogen charging and discharging pipe and a filtering member; wherein, the hydrogen charging and discharging pipe is mounted at one end of the tank body along the length direction thereof, and the hydrogen charging and discharging pipe extends along the length direction of the tank body; the hydrogen charging and discharging pipe is formed with a hydrogen charging and discharging port connected with the outside of the tank body; the filtering member is arranged in the hydrogen charging and discharging pipe and used for filtering hydrogen.

[0017] Compared with the prior art, the application has the beneficial effects that:

[0018] The hydrogen storage device provided by the application adopts a new heat exchange structure in the tank body, adopts the structure of a heat exchange box cooperating with a heat exchange pipe, and sets a heat conduction protruding part such as a heat conduction fin on the outer wall of the heat exchange box, thereby increasing the heat exchange area and improving the heat exchange efficiency. In addition, the tank body includes an outer tank body and an inner tank body, and the double structure of the outer tank body and the inner tank body is set, which can increase the structural strength of the hydrogen storage device, play a safety protection and explosion-proof role, and the pressure relief valve can relieve the pressure of the chamber between the outer tank body and the inner tank body, which is safer and more reliable. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the specific embodiments or the prior art of the application, the drawings needed to be used in the specific embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0020] Figure 1 Partial explosion diagram of the hydrogen storage device provided by the embodiments of the application;

[0021] Figure 2 Schematic diagram of the heat exchange structure provided by the embodiments of the application.

[0022] Reference signs:

[0023] 1-tank body, 101-inner tank body, 102-outer tank body, 2-first conveying pipe, 3-heat exchange box, 31-heat conduction protruding part, 4-second conveying pipe, 5-converging branch pipe, 6-joint, 7-connection pipe, 8-heat exchange pipe, 9-first fixing seat, 91-first mounting through hole, 10-second fixing seat, 1001-second mounting through hole, 11-pressure relief valve, 12-hydrogen charging and discharging pipe, 121-hydrogen charging and discharging port, 13-circumferential heat exchange box assembly, 14-longitudinal heat exchange box assembly. DETAILED DESCRIPTION

[0024] The technical solutions of the application will be described in detail below with reference to the drawings. Obviously, the described embodiments are some embodiments of the application, not all embodiments of the application.

[0025] The components of the embodiments of the application described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the application provided in the drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the application.

[0026] All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative labor fall within the scope of the present application.

[0027] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] Hereinafter, the hydrogen storage device according to some embodiments of the present application will be described with reference to the accompanying drawings. Figure 1 and Figure 2 The hydrogen storage device according to some embodiments of the present application is described.

[0030] Referring to Figure 1 and Figure 2 The embodiments of the present application provide a hydrogen storage device, comprising: a tank body 1, a first conveying pipe 2, a heat exchange box 3 and a second conveying pipe 4; wherein the heat exchange box 3 is arranged in the tank body 1, and the heat exchange box 3 extends along the circumference of the tank body 1; the liquid inlet of the heat exchange box 3 can be connected in communication with the liquid supply end outside the tank body 1 through the first conveying pipe 2, and the liquid outlet of the heat exchange box 3 can be connected in communication with the return end outside the tank body 1 through the second conveying pipe 4.

[0031] According to the structure described above, the hydrogen storage device provided by the present application adopts the structure that the heat exchange box 3 extends along the circumference of the tank body 1, instead of the structure of the heat exchange pipe 8 in the prior art, the heat exchange area is increased, and the heat exchange effect is improved, that is, the heat exchange efficiency is improved.

[0032] It should be noted that: Figure 1 only half of the structure of the tank body is given, and the other half of the tank body is omitted.

[0033] In this embodiment, preferably, as Figure 1As shown, the number of heat exchange boxes 3 is multiple, and is sequentially and spacedly arranged along the circumferential direction perpendicular to the length direction of the tank body 1. It should be noted that the multiple heat exchange boxes 3 located on the same circumference are referred to as a circumferential heat exchange box assembly 13, which will be described below.

[0034] According to the above-described structure, multiple heat exchange boxes 3 are arranged around the entire circumference of the tank body 1, further improving the heat exchange area, thereby helping to improve the heat exchange efficiency.

[0035] Further, preferably, the number of heat exchange boxes 3 included in the circumferential heat exchange box assembly 13 is three, of course, not limited to this, but also greater than three, such as four or five, etc., and also less than three, such as two or one, etc. In particular, when the number of heat exchange boxes 3 included in the circumferential heat exchange box assembly 13 is one, and this one heat exchange box 3 can be a complete annular structure, or a part of the annular structure, which is selected according to actual needs.

[0036] Further, preferably, the multiple heat exchange boxes 3 in the circumferential heat exchange box assembly 13 are sequentially and uniformly spaced around the central axis.

[0037] It should be noted that the multiple heat exchange boxes 3 in the circumferential heat exchange box assembly 13 are not limited to being located on the same circumference perpendicular to the length direction of the heat exchange tank, but also can be sequentially and spacedly arranged in a spiral shape around the central axis of the tank body 1, or even connected together to form one heat exchange box 3, etc. The specific selection is based on actual needs.

[0038] In this embodiment, preferably, as shown, Figure 2 The number of heat exchange boxes 3 is multiple, and is sequentially and spacedly arranged along the length direction of the tank body 1, that is, the multiple heat exchange boxes 3 are arrayed in the length direction of the tank body 1 and in the circumferential direction perpendicular to the length direction of the tank body 1, which can also be understood as: the number of the aforementioned circumferential heat exchange box assembly 13 is multiple, and is sequentially and spacedly arranged along the length direction of the tank body 1, and the multiple heat exchange boxes 3 located on the same straight line parallel to the length direction of the tank body 1 can be referred to as a longitudinal heat exchange box assembly 14; the hydrogen storage device further comprises a connecting pipe 7, and any two adjacent heat exchange boxes 3 are connected in communication through the connecting pipe 7 along the length direction of the tank body 1.

[0039] According to the above-described structure, the heat exchange boxes 3 are arranged in the length direction of the tank body 1 and in the circumferential direction, increasing the area of the heat exchange region, and the distribution is more uniform, greatly improving the heat exchange efficiency. Moreover, along the length direction of the tank body 1, any two adjacent heat exchange boxes 3 are connected in communication through the connecting pipe 7, which facilitates the circulation of the heat exchange liquid along the length direction of the tank body 1, shortens the circulation distance, and accelerates the heat exchange efficiency.

[0040] In this embodiment, preferably, as shown in Figure 2 The hydrogen storage device further comprises a merging branch pipe 5 and a joint 6; the merging branch pipe 5 is arranged inside one end of the tank body 1 along the length direction of the tank body 1; each longitudinal heat exchange box assembly 14 is provided with a merging branch pipe 5, and the merging branch pipes 5 are connected at one end; and the joint 6 is arranged on one of the merging branch pipes 5, and one end of the joint 6 extends to the outside of the tank body 1 through the tank body 1.

[0041] According to the above structure, the merging branch pipe 5 is used to merge the second delivery pipes 4 of the plurality of heat exchange boxes 3, and a through hole is arranged on one of the merging branch pipes 5, and the joint 6 is arranged on the through hole, so that the liquid can be input or output through the joint 6; in this embodiment, the joint 6 can be used as an output joint 6, thereby reducing the number of joints 6, and further reducing the openings on the tank body 1, which helps to improve the sealing performance.

[0042] It should be noted that the merging branch pipe 5 can not be arranged, and only the second delivery pipe 4 can be used as the liquid input or output pipeline; the specific selection can be made according to actual needs.

[0043] In addition, it should be noted that the above structure in which the plurality of heat exchange boxes 3 are arranged in the length direction of the tank body 1 and in the circumferential direction perpendicular to the length direction of the tank body 1 is not limited, and the plurality of heat exchange boxes 3 can be arranged only in the length direction of the tank body 1, that is, only one circumferential heat exchange box assembly 13 is arranged, or the plurality of heat exchange boxes 3 can be arranged only in the circumferential direction perpendicular to the length direction of the tank body 1, that is, only one longitudinal heat exchange box assembly 14 is arranged; the specific selection can be made according to actual needs.

[0044] In this embodiment, preferably, as shown in Figure 2 The plurality of heat exchange boxes 3 surround the mounting cavity, the hydrogen storage device further comprises a heat exchange pipe 8, and the heat exchange pipe 8 is arranged inside or outside the mounting cavity, and the heat exchange pipe 8 is in communication with the merging branch pipe 5.

[0045] According to the above structure, the heat exchange pipe 8 is additionally arranged on the basis of the heat exchange box 3, thereby greatly improving the heat exchange efficiency.

[0046] Further, preferably, the number of heat exchange pipes 8 is multiple, and the heat exchange pipes 8 are sequentially and spacedly arranged along the circumferential direction perpendicular to the length direction of the tank body 1, thereby achieving uniform heat exchange and improving the heat exchange efficiency. Of course, the number of heat exchange pipes 8 can also be one, and the specific design can be made according to actual needs.

[0047] It should be noted that the heat exchange pipe 8 can not be arranged, that is, only the heat exchange box 3 and the first delivery pipe 2 and the second delivery pipe 4 are used for heat exchange; the specific selection can be made according to actual needs.

[0048] In this embodiment, preferably, as shown in Figure 2 The outer wall of the heat exchange box 3 is provided with a heat-conducting protrusion 31.

[0049] According to the above-described structure, the heat-conducting protrusion 31 is arranged on the side wall of the heat exchange box 3, the heat exchange area is increased, and the heat exchange effect is improved. Of course, it is not limited to this, and the heat-conducting protrusion 31 can also not be arranged on the outer wall of the heat exchange box 3.

[0050] Further, preferably, the aforementioned heat-conducting protrusion 31 is arranged on the side wall parallel to the length direction of the tank body 1.

[0051] Further, preferably, the number of heat-conducting protrusions 31 is multiple, and they are uniformly distributed, further increasing the heat exchange area and greatly improving the heat exchange effect.

[0052] Further, preferably, the heat-conducting protrusion 31 is in a sheet structure, has a large heat exchange area, and has a thin thickness, so that more heat-conducting protrusions 31 can be arranged in a limited space. Of course, it is not limited to this, and the heat-conducting protrusion 31 can also be in a block structure, etc.

[0053] In this embodiment, preferably, as shown in Figure 2 The heat exchange box 3 is a circular arc box body, which is adapted to the circular tank body 1, ensures the heat exchange area, is not easy to interfere with other components, and more heat exchange boxes 3 can be arranged in a limited space.

[0054] It should be noted that the structure of the heat exchange box 3 is not limited to the above-described circular arc structure, and a rectangular box body can also be used.

[0055] In this embodiment, preferably, as shown in Figure 1 The hydrogen storage device further comprises a first fixing seat 9 and a second fixing seat 10; along the length direction of the tank body 1, the first fixing seat 9 and the second fixing seat 10 are respectively fixed to the inside of the two ends of the tank body 1; the first fixing seat 9 is formed with a first mounting through hole 91, and the first conveying pipe 2 is mounted in the first mounting through hole 91; the second fixing seat 10 is formed with a second mounting through hole 1001, and the second conveying pipe 4 is mounted in the second mounting through hole 1001.

[0056] According to the above-described structure, the first fixing seat 9 and the second fixing seat 10 play a role in fixing the first conveying pipe 2 and the second conveying pipe 4, and then fix the heat exchange assembly as a whole, avoiding shaking, displacement, etc.

[0057] Further preferably, when the device comprises the aforementioned plurality of converging branch pipes 5, the plurality of converging branch pipes 5 are located between the end of the tank close to the converging branch pipes 5, for example the end of the inner tank body 101 described below, and the second fixed seat 10, playing the role of fixed avoidance and fixed converging branch pipes 5.

[0058] Further preferably, the first fixed seat 9 and the second fixed seat 10 are both connected to the tank body 1, for example the inner tank body 101 described below, by welding, of course, not limited to this.

[0059] In this embodiment, preferably, as shown in Figure 1 The tank body 1 comprises an inner tank body 101 and an outer tank body 102, and the inner tank body 101 is arranged inside the outer tank body 102, and the heat exchange box 3 is arranged inside the inner tank body 101.

[0060] According to the structure described above, the application is provided with an outer tank body 102 and an inner tank body 101, the double structure of the outer tank body 102 and the inner tank body 101 can increase the structural strength of the hydrogen storage device, play the role of safety protection and explosion prevention, wherein the inside of the inner tank body 101 is used to accommodate hydrogen storage materials such as hydrogen storage alloy powder, that is, the hydrogen storage materials such as hydrogen storage alloy powder are filled in the gap between the heat exchange structure, the hydrogen charging and discharging pipe 12 described below and the inner wall of the inner tank body 101.

[0061] Further preferably, the hydrogen storage device further comprises a pressure relief valve 11, and the pressure relief valve 11 is installed on the outer tank body 102, and the accommodation cavity between the inner tank body 101 and the outer tank body 102 can be connected with the outside of the outer tank body 102 through the pressure relief valve 11, so that the pressure relief valve 11 can relieve the cavity between the outer tank body 102 and the inner tank body 101.

[0062] Further preferably, the inner tank body 101 is a tank body 1 with hollow inside and open at both ends along the length direction, the outer tank body 102 is a tank body 1 with hollow inside and closed at both ends along the length direction (it needs to be explained that the closed here refers to the closed state formed after assembly with other parts, in fact, both ends need to be provided with installation through holes, playing the role of avoiding the hydrogen charging and discharging pipe 12, the first conveying pipe 2, the joint 6, etc.), the length directions of the inner tank body 101 and the outer tank body 102 are the same, and the both ends of the inner tank body 101 along the length direction abut against the both ends of the outer tank body 102 along the length direction, that is, the inner tank body 101 is a tank body 1 with hollow inside and open at both ends along the length direction, that is, the inner tank body 101 does not have end covers at both ends, while the outer tank body 102 has two end portions along the length direction, that is, has end covers at both ends, and the inner tank body 101 can share the end covers at both ends of the outer tank body 102.

[0063] Further, preferably, the inner tank body 101 and the outer tank body 102 are both structures composed of two half shells, which are more convenient for assembly, and the two half shells can be further connected by welding or the like, of course, not limited thereto.

[0064] In this embodiment, preferably, as shown in the drawings, the hydrogen storage device further comprises a hydrogen charging and discharging pipe 12, and the hydrogen charging and discharging pipe 12 is installed at one end of the tank body 1 along the length direction thereof, and the hydrogen charging and discharging pipe 12 extends along the length direction of the tank body 1; the hydrogen charging and discharging pipe 12 is formed with a hydrogen charging and discharging port 121 which is connected with the outside of the tank body 1. Figure 1

[0065] According to the structure described above, the hydrogen charging and discharging pipe 12 and the hydrogen charging and discharging port 121 are used for introducing or discharging hydrogen, and a filter member such as a filter screen or the like is arranged in the hydrogen charging and discharging pipe 12 to prevent it from being blocked by dust.

[0066] In this embodiment, preferably, as shown in the drawings, the hydrogen charging and discharging pipe 12 is located on the central axis of the tank body 1 and extends along the central axis. Figure 1

[0067] In this embodiment, preferably, as shown in the drawings, the tank body 1 is a regular circular tank, of course, not limited thereto, and the tank body 1 can also be a square tank or other shaped tank body 1, which is selected according to actual needs. Figure 1

[0068] In summary, the hydrogen storage device provided by the present application has the following structures and advantages:

[0069] The present application provides a hydrogen storage device with a novel heat exchange structure, which comprises a heat exchange pipe 8, a heat exchange box 3, a connecting pipe 7, a first conveying pipe 2 and a second conveying pipe 4, i.e. a liquid inlet pipe and a liquid outlet pipe, a merging branch pipe 5, etc. The number of heat exchange pipes 8 can be multiple, and they are distributed in a ring array shape with the central axis of the tank body 1 as the center. The outermost circle is also provided with a group of heat exchange boxes 3, and there are three groups along the length direction of the tank body 1, and each group has three heat exchange boxes 3. The heat exchange box 3 has an arc shape structure, and heat conducting protrusions 31 such as heat conducting fins are embedded in the inner and outer sides of the heat exchange box 3. The first conveying pipe 2 and the second conveying pipe 4, i.e. the liquid inlet pipe and the liquid outlet pipe, are fixed by the first fixing seat 9 and the second fixing seat 10, thereby fixing the heat exchange structure and making the heat exchange structure more stable.

[0070] In addition, the present application is provided with an outer tank body 102 and an inner tank body 101, and the double structure of the outer tank body 102 and the inner tank body 101 can increase the structural strength of the hydrogen storage device, play a safety protection and explosion-proof role, and the pressure relief valve 11 can relieve the pressure in the chamber between the outer tank body 102 and the inner tank body 101, which is more safe and reliable.

[0071] ​​​Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A hydrogen storage device, characterized by, The hydrogen storage device comprises a tank body, a first conveying pipe, a heat exchange box and a second conveying pipe; the heat exchange box is arranged in the tank body and extends along the circumferential direction of the tank body; the liquid inlet of the heat exchange box is connected to the liquid supply end outside the tank body through the first conveying pipe, and the liquid outlet of the heat exchange box is connected to the return end outside the tank body through the second conveying pipe. The heat exchange boxes are arranged in sequence along the circumferential direction perpendicular to the length direction of the tank body.

2. The hydrogen storage device of claim 1, wherein, The hydrogen storage device further comprises a merging branch pipe and a joint; along the length direction of the tank body, the merging branch pipe is arranged in the interior of one end of the tank body; each heat exchange box is provided with the merging branch pipe, and the end portions of the merging branch pipes are connected together; one of the merging branch pipes is provided with the joint, and one end of the joint extends to the outside of the tank body through the tank body.

3. The hydrogen storage device of claim 2, wherein, The heat exchange boxes surround an installation cavity, and the hydrogen storage device further comprises a heat exchange pipe arranged in the installation cavity or outside the installation cavity, and the heat exchange pipe is connected to the merging branch pipe.

4. The hydrogen storage device of claim 3, wherein, The heat exchange pipes are arranged in sequence along the circumferential direction perpendicular to the length direction of the tank body.

5. The hydrogen storage device of claim 4, wherein, The heat exchange boxes are arranged in sequence along the length direction of the tank body; the hydrogen storage device further comprises a connecting pipe, and any two adjacent heat exchange boxes are connected through the connecting pipe along the length direction of the tank body; and / or 6. The hydrogen storage device of claim 1, wherein, The outer wall of the heat exchange box is provided with a heat-conducting protruding portion; and / or The heat exchange box is a circular arc box. The hydrogen storage device further comprises a first fixing seat and a second fixing seat; along the length direction of the tank body, the first fixing seat and the second fixing seat are respectively fixed in the interiors of the two ends of the tank body; the first fixing seat is formed with a first installation through hole, and the first conveying pipe is installed in the first installation through hole; the second fixing seat is formed with a second installation through hole, and the second conveying pipe is installed in the second installation through hole.

7. The hydrogen storage device of claim 1, wherein, The tank body comprises an inner tank body and an outer tank body, and the inner tank body is arranged in the interior of the outer tank body, and the heat exchange box is arranged in the interior of the inner tank body.

8. The hydrogen storage device of claim 1, wherein, The hydrogen storage device further comprises a pressure relief valve, and the pressure relief valve is installed on the outer tank body; the accommodating cavity between the inner tank body and the outer tank body is connected to the outside of the outer tank body through the pressure relief valve; and / or 9. The hydrogen storage device of claim 8, wherein, The inner tank body is hollow and open at both ends along the length direction, the outer tank body is hollow and closed at both ends along the length direction, the length directions of the inner tank body and the outer tank body are the same, and the two end portions of the inner tank body along the length direction abut against the two end portions of the outer tank body along the length direction. ​ 10. The hydrogen storage device according to any one of claims 1 to 9, wherein, The hydrogen storage device further comprises a hydrogen charging and discharging pipe and a filter member; the hydrogen charging and discharging pipe is installed at one end of the tank body along the length direction of the tank body and extends along the length direction of the tank body; the hydrogen charging and discharging pipe is formed with a hydrogen charging and discharging port which is communicated with the outside of the tank body; and the filter member is arranged in the hydrogen charging and discharging pipe and used for filtering hydrogen.

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