Gas cylinder, hydrogen storage device and hydrogen fuel vehicle

Abstract

This invention belongs to the technical field of hydrogen storage equipment, and particularly relates to a gas storage cylinder, a hydrogen storage device, and a hydrogen fuel cell vehicle. The gas storage cylinder includes: a cylinder body with at least one opening section; a rigid end cap with an assembly opening section and a valve seat section, the valve seat section having a gas delivery channel, the cylinder body opening section being inserted into the assembly opening section, and the outer wall of the cylinder body opening section fitting against the inner wall of the assembly opening section; and a sealing sleeve including a cylinder body fitting section and an end cap fitting section, the end cap fitting section having a gas outlet, the cylinder body fitting section being inserted into the cylinder body opening section, the outer wall of the cylinder body fitting section fitting against the inner wall of the cylinder body opening section, and the outer wall of the end cap fitting section fitting against the inner wall of the rigid end cap, the gas outlet being connected to the gas delivery channel. The technical solution of this application solves the problems of existing gas storage cylinders using welding processes for assembly, which are outdated processes and involve high labor intensity and a poor working environment.

Description

Technical Field

[0001] This invention belongs to the technical field of hydrogen storage equipment, and particularly relates to a gas storage cylinder, a hydrogen storage device, and a hydrogen fuel cell vehicle. Background Technology

[0002] Currently, fuel cell systems use a single gas storage cylinder to store fuel gas. Generally, existing gas storage cylinders are made of metal, commonly steel. Therefore, the cylinder body typically consists of a body and a sealing head. The body is closed at one end and open at the other. The open end of the sealing head is welded to the open end of the body. Then, pipes are welded to the sealing head, and valves are installed on the pipes, thus completing the gas storage cylinder.

[0003] It is evident that the existing gas cylinders are assembled using welding technology, which is an outdated process. Furthermore, welding work is physically demanding and the working environment is poor. Summary of the Invention

[0004] The purpose of this invention is to provide a gas storage cylinder, a hydrogen storage device, and a hydrogen fuel cell vehicle, aiming to solve the problems of existing gas storage cylinders which are assembled and manufactured using welding processes, resulting in outdated manufacturing processes, high labor intensity, and poor working environments.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: a gas storage cylinder, comprising:

[0006] The bottle body has at least one opening segment.

[0007] The rigid end cap has an assembly opening section and a valve seat section. The valve seat section has a gas delivery channel. The bottle body opening section is inserted into the assembly opening section, and the outer wall of the bottle body opening section is attached to the inner wall of the assembly opening section.

[0008] A sealing sleeve includes a bottle body fitting section and a head fitting section. The head fitting section is provided with an air outlet. The bottle body fitting section is inserted into the bottle body opening section. The end of the bottle body fitting section extends beyond the end of the fitting opening section. The outer wall of the bottle body fitting section is attached to the inner wall of the bottle body opening section. Furthermore, the outer wall of the head fitting section is attached to the inner wall of the rigid head. The air outlet is connected to the gas delivery channel.

[0009] The port of the assembly opening section is provided with a first limiting tooth, and the outer wall of the bottle body opening section is provided with a second limiting tooth. The first limiting tooth and the second limiting tooth are engaged with each other.

[0010] The gas cylinder also includes an external pressure-bearing layer, which encloses the main body of the cylinder and the rigid end cap.

[0011] In one embodiment, the outer wall of the bottle body mating section is provided with at least one circumferential groove, the circumferential groove is used to fill with sealant, and the sealant of the circumferential groove abuts against the inner wall of the bottle body opening section; or, the inner wall of the bottle body opening section is provided with at least one circumferential groove, the circumferential groove is used to fill with sealant, and the sealant of the circumferential groove abuts against the outer wall of the bottle body mating section.

[0012] In one embodiment, there are multiple circumferential grooves, and at least one circumferential groove is provided between the bottle body fitting section and the bottle body opening section, and between the assembly opening section and the bottle body opening section.

[0013] In one embodiment, the vent protrudes from the outer wall of the end cap section in a direction away from the bottle body section, the vent is inserted into the gas delivery channel, and a sealing ring is provided between the vent and the wall of the gas delivery channel.

[0014] In one embodiment, at least one annular groove is provided circumferentially on the outer wall of the bottle opening section, the annular groove being filled with sealant, and the sealant in the annular groove abutting against the inner wall of the assembly opening section; or, at least one annular groove is provided circumferentially on the inner wall of the assembly opening section, the annular groove being filled with sealant, and the sealant in the annular groove abutting against the outer wall of the bottle opening section.

[0015] In one embodiment, the outer wall of the bottle opening section is provided with a circumferential step, the second limiting protrusion is provided on the circumferential step, and the outer wall surface of the assembly opening section is flush with the outer wall surface of the bottle body.

[0016] In one embodiment, the bottle opening section has a radially inwardly recessed annular neck, the inner wall surface of the fitting opening section protrudes radially to adapt and fit with the outer wall surface of the annular neck, and the outer wall surface of the bottle fitting section protrudes radially to adapt and fit with the inner wall surface of the annular neck.

[0017] In one embodiment, the outer wall of the bottle opening section is provided with circumferential ribs, and the inner wall of the assembly opening section is provided with circumferential grooves. The circumferential ribs are engaged in the circumferential grooves when the bottle opening section is inserted into the assembly opening section.

[0018] According to another aspect of the present invention, a hydrogen storage device is provided. Specifically, the hydrogen storage device includes a gas storage cylinder as described above.

[0019] According to another aspect of the present invention, a hydrogen fuel cell vehicle is provided. Specifically, the hydrogen fuel cell vehicle includes a hydrogen storage device as described above.

[0020] The present invention has at least the following beneficial effects:

[0021] The gas cylinder provided by this invention has an inner liner assembled from a cylinder body, a rigid end cap, and a sealing sleeve. Generally, the outer pressure-bearing layer of the inner liner is formed by winding carbon fiber composite material. During assembly, the cylinder body fitting section of the sealing sleeve is first inserted into the cylinder body opening section. Then, the cylinder body opening section is inserted into the assembly opening section of the rigid end cap, ensuring that the outer wall of the cylinder body opening section fits against the assembly opening section and the outer wall of the fitting section fits against the inner wall of the cylinder body opening section. Finally, carbon fiber composite material is wound around the cylinder body and the rigid end cap to bear the pressure of the high-pressure gas inside the cylinder. When high-pressure gas is filled, the gas pressure applies radial outward pressure to the sealing sleeve and the cylinder body opening section, causing deformation. Since the rigid end cap deforms less, the sealing sleeve and the cylinder body opening section press against each other, and the cylinder body opening section presses against the inner wall of the assembly opening section of the rigid end cap, thus achieving an effective sealing effect. Compared to existing gas cylinders manufactured through welding processes, the gas cylinder provided by this invention adopts a modular assembly method. That is, the gas cylinder is assembled by the main body of the cylinder, a rigid end cap, a sealing sleeve, and an external pressure-bearing layer. The assembly process is more complete and simpler. Production workers do not need to endure the high-temperature working environment of the welding workshop, which improves the working environment of the workers and realizes the humanization of the workshop. Attached Figure Description

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

[0023] Figure 1 This is a schematic diagram of the assembly of the gas storage cylinder according to Embodiment 1 of the present invention;

[0024] Figure 2 for Figure 1 The diagram shows the assembly of the gas cylinder after the external pressure-bearing layer has been removed.

[0025] Figure 3 for Figure 1 A cross-sectional view along the AA direction;

[0026] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0027] Figure 5 This is a schematic diagram of the main body of the gas storage cylinder according to Embodiment 1 of the present invention;

[0028] Figure 6 This is a schematic diagram of the rigid end cap of the gas storage cylinder according to Embodiment 1 of the present invention;

[0029] Figure 7 This is a schematic diagram of the sealing sleeve of the gas storage cylinder according to Embodiment 1 of the present invention;

[0030] Figure 8 This is a partial cross-sectional view of the gas storage cylinder according to Embodiment 2 of the present invention;

[0031] Figure 9 for Figure 8 Enlarged view of point C in the middle;

[0032] Figure 10 Assembly diagram of the gas storage cylinder according to Embodiment 3 of the present invention;

[0033] Figure 11 for Figure 10 The diagram shows the assembly of the gas cylinder after the external pressure-bearing layer has been removed.

[0034] The following are the labeling elements in the figure:

[0035] 10. Bottle body; 11. Bottle opening section; 111. Annular groove; 112. Second limiting tooth; 113. Neck ring; 114. Circumferential rib;

[0036] 20. Rigid end cap; 21. Assembly opening section; 211. First limiting tooth; 212. Circumferential groove; 22. Valve seat section; 221. Gas transmission passage;

[0037] 30. Sealing sleeve; 31. Bottle body mating section; 32. End cap mating section; 321. Gas outlet; 33. Circumferential groove;

[0038] 40. Sealing ring;

[0039] 100. External pressure-bearing layer. Detailed Implementation

[0040] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0041] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0042] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0043] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0044] Example 1:

[0045] like Figures 1 to 7 As shown, it illustrates a structural schematic diagram of the gas storage cylinder provided in Embodiment 1 of the present invention.

[0046] Specifically, such as Figures 1 to 3 As shown, the gas storage cylinder provided in Embodiment 1 of the present invention includes a cylinder body 10, a rigid end cap 20, a sealing sleeve 30, and an outer pressure-bearing layer 100. The cylinder body 10 is integrally manufactured by blow molding, and the sealing sleeve 30 is injection molded. The rigid end cap 20 is preferably made of metal (e.g., aluminum alloy). The cylinder body 10 has at least one cylinder opening section 11, and the rigid end cap 20 has an assembly opening section 21 and a valve seat section 22. The valve seat section 22 has a gas delivery channel 221, and the cylinder opening section 11 is inserted into the assembly opening section 21. In the assembly opening section 21, the outer wall of the bottle body opening section 11 is attached to the inner wall of the assembly opening section 21. The sealing sleeve 30 includes a bottle body fitting section 31 and a head fitting section 32. The head fitting section 32 is provided with an air outlet 321. The bottle body fitting section 31 is inserted into the bottle body opening section 11. The outer wall of the bottle body fitting section 31 is attached to the inner wall of the bottle body opening section 11. Furthermore, the outer wall of the head fitting section 32 is attached to the inner wall of the rigid head 20. The air outlet 321 is connected to the gas delivery channel 221. The external pressure-bearing layer 100 wraps around the bottle body 10 and the rigid head 20.

[0047] In Embodiment 1 of the present invention, the gas storage bottle is configured as a long and narrow straight bottle, and only one end of the bottle body 10 of the long and narrow straight bottle is configured as the bottle body opening section 11.

[0048] The thickness of the outer pressure-bearing layer 100 varies depending on the diameter of the main body 10 of the gas cylinder and the working pressure. The outer pressure-bearing layer 100 consists of a fiber layer including circumferential winding, high-angle spiral winding, and low-angle spiral winding. For example, under a working pressure of 70 MPa, the number of axial winding layers is 2 to 5, and the number of spiral winding layers is 2 to 5. The thickness of the outer pressure-bearing layer 100 corresponding to the straight cylinder body of the gas storage cylinder is 4 to 10 mm. The outer pressure-bearing layer 100 can be formed using wet or dry methods, through monofilament winding, multifilament winding, braided winding, etc. Among them, circumferential winding mainly provides the ring stiffness of the straight cylinder body of the gas storage cylinder, and low-angle spiral winding provides axial strength through the valve seat sections 22 at both ends of the gas storage cylinder. Because the outer pressure-bearing layer 100 is relatively thick, if only circumferential winding and low-angle spiral winding are used, resin cavities will be formed between the edge of the circumferential winding and the low-angle spiral winding, causing localized strength reduction and thus reducing safety. Therefore, between circumferential winding and low-angle spiral winding, a high-angle spiral winding is required, extending only to below the shoulder of the rigid head 20 without passing through the polar hole (i.e., the through hole of the gas delivery channel 221), to ensure a smooth transition in the shape between the outer pressure-bearing layers 100 without any cavities. For example, a typical 36L gas cylinder with an outer diameter of 300mm has an outer pressure-bearing layer 100 thickness of up to 30 layers, of which approximately 6 to 7 layers are high-angle spiral windings. For this application, since the outer pressure-bearing layer 100 is relatively thin (in terms of total number of layers and the area extending below the shoulder of the rigid head 20), a design without high-angle spirals is adopted.

[0049] The above design ensures that the fixing and sealing effect of the gas cylinder will not be affected by the interface damage between the cylinder opening section 11, the assembly opening section 21 and the cylinder mating section 31 caused by repeated filling and discharging of high-pressure gas during its service life, thereby meeting the performance requirements of 70MPa working pressure, more than 2.25 times the burst pressure and more than 22,000 cycles.

[0050] The gas cylinder provided by this invention has an inner liner assembled from a cylinder body 10, a rigid end cap 20, and a sealing sleeve 30. Generally, the outer pressure-bearing layer 100 of the inner liner is formed by winding carbon fiber composite material or similar materials. In specific assembly, firstly, the cylinder body fitting section 31 of the sealing sleeve 30 is inserted into the cylinder body opening section 11 of the cylinder body 10. Then, the cylinder body opening section 11 of the cylinder body 10 is inserted into the fitting opening section 21 of the rigid end cap 20. The outer wall of the cylinder body opening section 11 is fitted against the fitting opening section 21, and the outer wall of the cylinder body fitting section 31 is fitted against the inner wall of the cylinder body opening section 11. Finally, the outer pressure-bearing layer 100 is assembled, enclosing the cylinder body 10 and the rigid end cap 20 to bear the pressure of the high-pressure gas inside the cylinder. When high-pressure gas is introduced, the gas pressure applies radial outward pressure to the sealing sleeve 30 and the bottle opening section 11, causing deformation of both. Since the rigid end cap 20 deforms relatively little (metal materials hardly deform), the sealing sleeve 30 and the bottle opening section 11 press against each other, and the bottle opening section 11 presses against the inner wall of the assembly opening section 21 of the rigid end cap 20, thus achieving an effective seal. Compared to existing gas cylinders manufactured through welding processes, the gas cylinder provided by this invention uses a modular assembly method. That is, the gas cylinder is assembled from the bottle body 10, the rigid end cap 20, the sealing sleeve 30, and the external pressure-bearing layer 100. The assembly process is more complete and simplified, and production workers no longer need to endure the high-temperature working environment of the welding workshop, improving the working environment and achieving a more humanized workshop.

[0051] In Embodiment 1 of the present invention, the slender bottle body 10 adopts a thin-walled, small-diameter design, wherein the inner diameter of the bottle body ranges from 50mm to 100mm, the wall thickness from 1mm to 5mm, and the length ranges from 1000mm to 3000mm. The wall thickness of the arc-shaped region near the valve seat section 22 of the assembly opening section 21 ranges from 2mm to 4mm, and the wall thickness of the joint between the rigid end cap 20 and the bottle body 10 (i.e., the assembly opening section 21) ranges from 1mm to 2mm.

[0052] To ensure that the gas cylinder remains sealed and leak-free when storing high-pressure gas, therefore, Figure 4 and Figure 7As shown, at least one circumferential groove 33 is formed on the outer wall of the bottle body mating section 31. The circumferential groove 33 is used to fill sealant, and the sealant in the circumferential groove 33 abuts against the inner wall of the bottle body opening section 11. Thus, when high-pressure gas is stored in the gas cylinder, the pressure of the high-pressure gas is applied to the inner wall of the sealing sleeve 30. At this time, the entire sealing sleeve 30 is deformed outward under force, causing the outer wall of the bottle body mating section 31 to adhere to the inner wall of the bottle body opening section 11 and the outer wall of the end cap mating section 32 to adhere to the inner wall of the rigid end cap 20. Correspondingly, the sealant filled in the circumferential groove 33 is also compressed and deformed, thus the sealant more fully seals the bottle body mating section 31 and the bottle body opening section 11. Alternatively, in another embodiment, at least one circumferential groove 33 is provided on the inner wall of the bottle opening section 11. The circumferential groove 33 is used to fill the sealant, and the sealant in the circumferential groove 33 abuts against the outer wall of the bottle body mating section 31. In this way, when high-pressure gas is stored in the gas storage bottle, the pressure of the high-pressure gas causes the sealant filled in the circumferential groove 33 to be squeezed and deformed, so that the sealant seals the bottle body mating section 31 and the bottle body opening section 11 more fully.

[0053] In Embodiment 1 of the present invention, there are multiple circumferential grooves 33, and adjacent circumferential grooves 33 are arranged at intervals. A multi-level seal is formed by filling the multiple circumferential grooves 33 with sealant, thereby improving the sealing reliability. Further, as... Figure 3 and Figure 4 As shown, the end of the bottle body fitting section 31 extends beyond the end of the assembly opening section 21, and at least one circumferential groove 33 is provided between the bottle body fitting section 31 and the bottle body opening section 11, and between the assembly opening section 21 and the bottle body opening section 11. When the gas cylinder stores high-pressure gas, the outward expansion deformation of the rigid end cap 20 caused by the high-pressure gas pressure is relatively small, while the outward expansion deformation of the bottle body 10 and the sealing sleeve 30 caused by the high-pressure gas pressure is relatively large compared to the deformation of the rigid end cap 20. Thus, the outward expansion deformation of the portion of the bottle body fitting section 31 that extends beyond the assembly opening section 21 and the corresponding bottle body opening section 11 of the bottle body 10 under the action of high-pressure gas pressure is larger than the outward expansion deformation of the portion inserted into the rigid end cap 20. Therefore, the sealant filled in the circumferential grooves 33 between the bottle body mating section 31 and the bottle body opening section 11, and between the assembly opening section 21 and the bottle body opening section 11, undergoes more significant compression deformation under the pressure of high-pressure gas, thus providing a more reliable sealing effect between the bottle body mating section 31 and the bottle body opening section 11. In Embodiment 1 of the present invention, only one circumferential groove 33 is provided between the bottle body mating section 31 and the bottle body opening section 11, and between the assembly opening section 21 and the bottle body opening section 11.

[0054] To further improve the sealing effect of the gas cylinder and prevent leakage when storing high-pressure gas, therefore, such as Figure 3 and Figure 7 As shown, the vent 321 protrudes from the outer wall of the end cap mating section 32 in a direction away from the cylinder body mating section 31. The vent 321 is inserted into the gas delivery channel 221, and a sealing ring 40 is provided between the vent 321 and the hole wall of the gas delivery channel 221. Preferably, the sealing ring 40 is installed at the connection position between the end cap mating section 32 and the vent 321. In this way, when the gas cylinder stores high-pressure gas, the outward expansion deformation of the end cap mating section 32 under the pressure of the high-pressure gas is greater than the outward expansion deformation of the valve seat section 22. Therefore, the end cap mating section 32 and the valve seat section 22 squeeze and deform the sealing ring 40, forming a second seal between the end cap mating section 32 and the valve seat section 22. Combined with the sealant filled in the circumferential groove 33, the seal performance of the gas cylinder is more effectively guaranteed, and high-pressure gas leakage is effectively prevented.

[0055] Furthermore, such as Figure 4 and Figure 5 As shown, at least one annular groove 111 is circumferentially formed on the outer wall of the bottle opening section 11. The annular groove 111 is used to fill sealant, and the sealant in the annular groove 111 abuts against the inner wall of the assembly opening section 21. When the gas cylinder stores high-pressure gas, the outward expansion deformation of the rigid end cap 20 caused by the high-pressure gas pressure is relatively small, while the outward expansion deformation of the bottle body 10 and the sealing sleeve 30 caused by the high-pressure gas pressure is relatively large compared to the deformation of the rigid end cap 20. Thus, the outward expansion deformation of the bottle opening section 11 fits and presses against the inner wall of the assembly opening section 21, thereby compressing and deforming the sealant filled in the annular groove 111, thus forming a good seal between the bottle opening section 11 and the assembly opening section 21. Combined with the sealant formed by the sealant filled in the circumferential groove 33 and the seal between the sealing ring 40 and the end cap mating section 32 and the valve seat section 22, a better sealing effect is achieved. In one embodiment of the present invention, only one annular groove 111 is provided on the outer wall of the bottle opening section 11. Alternatively, in another embodiment, at least one annular groove 111 is provided circumferentially on the inner wall of the assembly opening section 21. The annular groove 111 is used to fill sealant, and the sealant in the annular groove 111 abuts against the outer wall of the bottle opening section 11. Thus, when high-pressure gas is stored in the gas cylinder, the pressure of the high-pressure gas causes the sealant filled in the annular groove 111 to be squeezed and deformed, thereby fully sealing the assembly opening section 21 and the bottle opening section 11.

[0056] like Figure 2 and Figure 6 As shown, the port of the assembly opening section 21 is provided with a first limiting tooth 211. Correspondingly, as... Figure 2 and Figure 5 As shown, the outer wall of the bottle opening section 11 is provided with a second limiting tooth 112. The first limiting tooth 211 and the second limiting tooth 112 are engaged with each other to prevent the rigid end cap 20 from rotating around the central axis of the gas storage bottle relative to the bottle body 10, thus ensuring the overall stability of the gas storage bottle. In the first embodiment of the present invention, the port of the assembly opening section 21 is set as a wavy first limiting tooth 211. Correspondingly, the outer wall of the bottle opening section 11 is also provided with a wavy second limiting tooth 112 that matches the wavy first limiting tooth 211. After the first limiting tooth 211 and the second limiting tooth 112 are engaged and assembled, the rigid end cap 20 can be prevented from rotating around the central axis of the gas storage bottle relative to the bottle body 10.

[0057] Specifically, such as Figures 3 to 5 As shown, the outer wall of the opening section 11 of the bottle body is provided with a circumferential step (not marked), the second limiting tooth 112 is provided on the circumferential step, and the outer wall surface of the assembly opening section 21 is flush with the outer wall surface of the bottle body 10, so that the surface of the gas storage bottle after assembly is flatter.

[0058] In Embodiment 1 of the present invention, as Figure 5 As shown, the bottle opening section 11 has a radially inwardly recessed annular neck 113. Correspondingly, as... Figure 3 and Figure 4 As shown, the inner wall surface of the assembly opening section 21 protrudes radially to fit and conform to the outer wall surface of the neck ring 113, and the outer wall surface of the bottle body fitting section 31 protrudes radially to fit and conform to the inner wall surface of the neck ring 113. Thus, when the bottle body opening section 11 is inserted into the assembly opening section 21 and the bottle body fitting section 31 is inserted into the bottle body opening section 11, a tenon and mortise structure is formed between the bottle body opening section 11 and the assembly opening section 21, and between the bottle body fitting section 31 and the bottle body opening section 11. Therefore, when high-pressure gas is stored in the gas cylinder, the sealing sleeve 30 and the rigid end cap 20 are both restricted by the tenon and mortise structure and cannot detach axially from the bottle body 10, further improving the reliability of the gas cylinder.

[0059] Example 2:

[0060] like Figure 8 and Figure 9 The diagram shows a schematic representation of the gas storage cylinder provided in Embodiment 2 of the present invention. The gas storage cylinder provided in Embodiment 2 differs from the gas storage cylinder provided in Embodiment 1 in the following ways.

[0061] In the second embodiment of the present invention, in order to further enhance the effect of restricting the sealing sleeve 30 and the rigid end cap 20 from axially separating from the bottle body 10, the outer wall of the bottle opening section 11 is provided with a circumferential rib 114, and the inner wall of the assembly opening section 21 is provided with a circumferential groove 212, such as... Figure 9 As shown, the circumferential rib 114 is engaged in the circumferential groove 212 when the bottle opening section 11 is inserted into the assembly opening section 21. When high-pressure gas is stored in the gas cylinder, the circumferential rib 114 and the circumferential groove 212 restrict the axial movement freedom between the rigid end cap 20 and the bottle body 10, and further restrict the axial movement freedom of the sealing sleeve 30 relative to the bottle body 10.

[0062] Alternatively, in another embodiment, the inner wall of the assembly opening section 21 is provided with a circumferential rib 114, and correspondingly, the outer wall of the bottle body opening section 11 is provided with a circumferential groove 212. The circumferential rib 114 is embedded in the circumferential groove 212 when the bottle body opening section 11 is inserted into the assembly opening section 21.

[0063] Compared with the gas cylinder provided in Example 1, the gas cylinder provided in Example 2 is identical in all other aspects except for the above-mentioned structural differences, and therefore will not be described again here.

[0064] Example 3:

[0065] like Figure 10 and Figure 11 The diagram shows a schematic representation of the gas storage cylinder provided in Embodiment 3 of the present invention. The gas storage cylinder provided in Embodiment 3 differs from the gas storage cylinders provided in Embodiment 1 or Embodiment 2 in the following ways.

[0066] In the third embodiment of the present invention, the gas storage bottle is configured as a long and narrow straight bottle, and the two ends of the main body 10 of the long and narrow straight bottle are configured as bottle opening sections 11, and are assembled into the ends of the gas storage bottle by rigid end caps 20 and sealing sleeves 30.

[0067] Compared with the gas storage cylinders provided in Example 1 or Example 2, the gas storage cylinder provided in Example 3 has the same structure except for the above-mentioned structural differences, so it will not be described again here.

[0068] According to another aspect of the present invention, a hydrogen storage device is provided. Specifically, the hydrogen storage device includes a gas storage cylinder as described above.

[0069] According to another aspect of the present invention, a hydrogen fuel cell vehicle is provided. Specifically, the hydrogen fuel cell vehicle includes a hydrogen storage device as described above.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A gas storage cylinder, characterized in that, include: Bottle body (10), wherein the bottle body (10) is provided with at least one bottle opening section (11). A rigid end cap (20) is provided with an assembly opening section (21) and a valve seat section (22). The valve seat section (22) has a gas delivery channel (221). The bottle body opening section (11) is inserted into the assembly opening section (21), and the outer wall of the bottle body opening section (11) is attached to the inner wall of the assembly opening section (21). A sealing sleeve (30) includes a bottle body fitting section (31) and a head fitting section (32). The head fitting section (32) is provided with an air outlet (321). The bottle body fitting section (31) is inserted into the bottle body opening section (11). The end of the bottle body fitting section (31) extends beyond the end of the assembly opening section (21). The outer wall of the bottle body fitting section (31) is attached to the inner wall of the bottle body opening section (11). The outer wall of the head fitting section (32) is attached to the inner wall of the rigid head (20). The air outlet (321) is connected to the gas delivery channel (221). The port of the assembly opening section (21) is provided with a first limiting tooth (211), and the outer wall of the bottle body opening section (11) is provided with a second limiting tooth (112). The first limiting tooth (211) and the second limiting tooth (112) are engaged with each other. The gas storage cylinder also includes an external pressure-bearing layer (100), which encloses the cylinder body (10) and the rigid end cap (20).

2. The gas storage cylinder according to claim 1, characterized in that, The outer wall of the bottle body fitting section (31) is provided with at least one circumferential groove (33), the circumferential groove (33) is used to fill sealant, and the sealant of the circumferential groove (33) abuts against the inner wall of the bottle body opening section (11). Alternatively, at least one circumferential groove (33) is provided on the inner wall of the bottle opening section (11), the circumferential groove (33) is used to fill sealant, and the sealant of the circumferential groove (33) abuts against the outer wall of the bottle fitting section (31).

3. The gas storage cylinder according to claim 2, characterized in that, The number of the circumferential grooves (33) is multiple, and at least one of the circumferential grooves (33) is provided between the bottle body fitting section (31) and the bottle body opening section (11) and between the assembly opening section (21) and the bottle body opening section (11).

4. The gas storage cylinder according to claim 3, characterized in that, The vent (321) protrudes from the outer wall of the capping section (32) in a direction away from the bottle body fitting section (31). The vent (321) is inserted into the gas delivery channel (221). A sealing ring (40) is provided between the vent (321) and the hole wall of the gas delivery channel (221).

5. The gas storage cylinder according to any one of claims 1-4, characterized in that, At least one annular groove (111) is provided circumferentially on the outer wall of the bottle opening section (11), the annular groove (111) is used to fill sealant, and the sealant of the annular groove (111) abuts against the inner wall of the assembly opening section (21). Alternatively, the inner wall of the assembly opening section (21) is provided with at least one annular groove (111) circumferentially, the annular groove (111) is used to fill sealant, and the sealant of the annular groove (111) abuts against the outer wall of the bottle opening section (11).

6. The gas storage cylinder according to claim 5, characterized in that, The outer wall of the bottle opening section (11) is provided with a circumferential step, the second limiting tooth (112) is provided on the circumferential step, and the outer wall surface of the assembly opening section (21) is flush with the outer wall surface of the bottle body (10).

7. The gas storage cylinder according to claim 6, characterized in that, The bottle opening section (11) is provided with a radially recessed neck (113), the inner wall surface of the assembly opening section (21) protrudes radially to fit and conform to the outer wall surface of the neck (113), and the outer wall surface of the bottle fitting section (31) protrudes radially to fit and conform to the inner wall surface of the neck (113).

8. The gas storage cylinder according to claim 6, characterized in that, The outer wall of the bottle opening section (11) is provided with a circumferential rib (114), and the inner wall of the assembly opening section (21) is provided with a circumferential groove (212). When the bottle opening section (11) is inserted into the assembly opening section (21), the circumferential rib (114) is embedded in the circumferential groove (212).

9. A hydrogen storage device, characterized in that, Including the gas storage cylinder as described in any one of claims 1-8.

10. A hydrogen fuel cell vehicle, characterized in that, Includes the hydrogen storage device as described in claim 9.

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