Vehicle-mounted cryogenic hydrogen storage container

Abstract

The invention provides a vehicle-mounted cryogenic hydrogen storage container. The hydrogen storage container comprises a metal inner container, a composite material winding layer, a heat insulation structure, a supporting structure and a pipeline, the composite material winding layer comprises an impermeable layer, a pressure-bearing layer and a barrier layer; the supporting structure comprises front and rear supporting rings, front and rear supporting seats, front and rear radial traction wires and axial traction wires; the pipeline comprises a filling supply pipeline and a pressure relief pipeline; a composite material winding layer and a heat insulation structure are sequentially laid on the outer surface of the metal liner, and then the metal liner is fixed in the metal shell through a supporting structure to form a closed vacuum cavity; an inner cavity of the metal inner container is communicated with the outside through a pipeline. Compared with a traditional vehicle-mounted cryogenic hydrogen storage container, the cryogenic hydrogen storage container provided by the invention is lighter in weight, high in hydrogen storage density and good in mechanical environment adaptability, and the dormancy time is greatly prolonged.

Description

Technical Field

[0001] The present invention belongs to the field of new energy vehicle power technology, and specifically relates to an on-vehicle cryogenic hydrogen storage container. Background Art

[0002] Hydrogen energy is crucial for reducing carbon emissions and driving the new energy revolution. Hydrogen storage is a crucial link in the hydrogen energy industry chain that urgently needs breakthroughs. Currently, the more mature on-board hydrogen storage technologies include high-pressure gaseous hydrogen storage and liquid hydrogen storage. High-pressure gaseous hydrogen storage offers advantages such as low cost, fast charging and discharging, and zero hydrogen loss.

[0003] However, the hydrogen storage density is limited by the storage pressure and is difficult to increase significantly; liquid hydrogen storage has the advantage of high hydrogen storage density, but there is a problem of large hydrogen loss due to the short dormancy time. For example, the invention patent with publication number CN109707991A discloses a deep-cold high-pressure hydrogen storage bottle, which only reduces thermal conductivity through structures such as the inner and outer cylinders and the vacuum insulation layer between them, but the storage sealing degree is not high, and the short dormancy time leads to large hydrogen loss. In addition, the invention patent with publication number CN112393108B also uses a simple sealing structure to achieve hydrogen storage, and the reliability of the structure needs to be improved.

[0004] As vehicle hydrogen storage requirements continue to increase, there is an urgent need for an on-board hydrogen storage container with higher storage density and longer dormancy time. Summary of the Invention

[0005] In view of the defects in the prior art, the purpose of the present invention is to provide a vehicle-mounted deep-cold hydrogen storage container.

[0006] According to the present invention, a vehicle-mounted cryogenic hydrogen storage container is provided, comprising: a metal liner 1, a composite material winding layer 2, an insulation structure 3, a support structure 5, and a pipeline 6;

[0007] The outer surface of the metal liner 1 is sequentially coated with a composite material winding layer 2 and an insulation structure 3, and then fixed to the inside of the metal shell 4 through multiple groups of the support structure 5 to form a closed vacuum chamber 7; the inner cavity of the metal liner 1 is connected to the outside through a pipeline 6.

[0008] Preferably, the composite winding layer 2 includes: an anti-seepage layer 21, a pressure-bearing layer 22 and a barrier layer 23;

[0009] The innermost layer is an anti-seepage layer 21 to reduce air leakage of the composite material; the middle layer is a pressure-bearing layer 22, which, together with the metal liner 1, bears the entire internal pressure; and the outermost layer is a barrier layer 23 to reduce outgassing of the composite material.

[0010] Preferably, the support structure 5 comprises: a support ring 51, a rear support ring 52, a front support seat 53, a rear support seat 54, a front radial traction wire 55, a rear radial traction wire 56 and an axial traction wire 57;

[0011] The front support ring 51 and the rear support ring 52 are arranged on the outside of the composite material winding layer 2; the front support seat 53 and the rear support seat 54 are fixed on the inner surface of the metal shell 4;

[0012] There are multiple front radial traction wires 55 and rear radial traction wires 56 to achieve radial support;

[0013] There are multiple axial traction wires 57 to achieve axial support;

[0014] The two ends of the front radial traction wire 55 are respectively connected and fixed to the front support ring 51 and the front support seat 53, and the two ends of the rear radial traction wire 56 are respectively connected and fixed to the rear support ring 52 and the rear support seat 54; each front radial traction wire 55 and rear radial traction wire 56 are tangent to the outer circle of the front support ring 51 and the rear support ring 52 respectively;

[0015] The axial traction wires 57 are divided into two groups; one group of traction wires has two ends respectively connected and fixed to the front support ring 51 and the rear support seat 54; the other group of traction wires has two ends respectively connected and fixed to the rear support ring 52 and the front support seat 53.

[0016] Preferably, the front support ring 51 and the rear support ring 52 have the same structure, and are a metal ring structure that is glued and fixed to the outside of the composite material winding layer 2, or a composite material ring structure that is machined after being laid and cured together with the composite material winding layer 2;

[0017] The front support seat 53 and the rear support seat 54 have the same structure, and are metal ring structures fixed to the inner surface of the cylindrical section of the metal shell 4 by welding or bonding.

[0018] Preferably, the outer surfaces of the front supporting ring 51 and the rear supporting ring 52 are respectively circumferentially evenly distributed with 12-24 mounting hole ears for connecting the front radial traction wire 55 and the rear radial traction wire 56;

[0019] The inner surfaces of the front support seat 53 and the rear support seat 54 are respectively uniformly distributed circumferentially with 12-24 mounting hole lugs for connecting the front radial traction wire 55 and the rear radial traction wire 56;

[0020] The number of the front radial traction wires 55 and the rear radial traction wires 56 is the same, and both are 12-24.

[0021] The two ends of the front radial traction wire 55 are respectively connected and fixed to the mounting holes of the front support ring 51 and the front support seat 53; the two ends of the rear radial traction wire 56 are respectively connected and fixed to the mounting holes of the rear support ring 52 and the rear support seat 54;

[0022] The axial traction wires 57 are divided into two groups, with 12-24 wires in each group; the two ends of one group of traction wires are respectively connected and fixed to the mounting holes of the front support ring 51 and the rear support seat 54, and the two ends of the other group of traction wires are respectively connected and fixed to the mounting holes of the rear support ring 52 and the front support seat 53.

[0023] Preferably, the metal liner 1 and the metal shell 4 are made of stainless steel or aluminum alloy cylindrical structures, and are welded together by a cylindrical section and end caps;

[0024] The wall thickness of the metal liner 1 is 3-4 mm; the wall thickness of the metal shell 4 is 2-4 mm.

[0025] Preferably, the anti-seepage layer 21 is a dense, resin-rich structure composed of resin and low-permeability non-metal, with a thickness of 0.01-0.05 mm;

[0026] The pressure-bearing layer 22 is a composite structure composed of carbon fiber and cryogenic resin, with a thickness of 8-15 mm;

[0027] The barrier layer 23 is a fluoroplastic or butyl vinyl acetate coating with a thickness of 1-2 mm.

[0028] Preferably, the thermal insulation structure 3 is a multi-layer structure of aluminum-plated composite film and fiber cloth laid layer by layer, with a thickness of 10-30 mm;

[0029] The vacuum degree of the sealed vacuum chamber 7 is not higher than 10 -5 Pa.

[0030] Preferably, the front radial traction wire 55 , the rear radial traction wire 56 and the axial traction wire 57 are woven from 5 to 10 strands of carbon fiber wire.

[0031] Preferably, the pipeline 6 includes a filling supply pipeline 61 and a pressure relief pipeline 62;

[0032] The filling supply pipeline 61 is used to fill the inner cavity of the metal liner 1 with low-pressure liquid-phase hydrogen;

[0033] When the pressure limit of the composite material wrapping layer 2 is reached, gaseous phase is released through the pressure relief pipe 62 to reduce the inner cavity pressure of the metal liner 1 .

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] 1. The present invention provides a composite material winding layer on the outside of the metal liner, which can increase the initial pressure during liquid hydrogen filling, so that a larger mass of hydrogen can be added under the same inner cavity volume, thereby achieving an increase in hydrogen storage density.

[0036] 2. The composite material winding layer of the present invention can greatly improve the pressure-bearing performance of the metal lining through multi-layer structural design and the application of low thermal conductivity materials, thereby increasing the critical pressure for safe pressure relief of the hydrogen storage bottle and extending the dormant period.

[0037] 3. The present invention adopts a support structure that combines "metal / composite support rings, carbon fiber traction wires, and metal support seats" to replace the traditional metal plate / rod support structure, which greatly reduces the weight. At the same time, due to the low thermal conductivity of the composite material, the heat conduction is reduced, thereby extending the dormant period. In addition, the layout design of the radial and axial traction wires allows loads in any direction to be transmitted through the tensile traction wires, fully utilizing the high tensile properties of carbon fiber and enhancing the adaptability of the container to the mechanical environment.

[0038] 4. The thermal insulation structure of the present invention is a multi-layer structure of aluminum-plated composite film and fiber cloth laid layer by layer, which can effectively reduce radiation heat leakage; the vacuum degree of the sealed vacuum chamber is not higher than 10 -5 Pa, further reducing heat conduction and extending the dormant time of liquid hydrogen storage.

[0039] 5. The present invention reduces the air leakage and degassing rate of the metal lining and the composite material wrapping layer by providing an anti-seepage layer and a barrier layer, thereby prolonging the vacuum maintenance time of the sealed vacuum layer, reducing radiation heat exchange, and thus achieving an extension of the dormant period. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Other features, objects and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0041] Figure 1 A schematic diagram of the overall structure of the vehicle-mounted cryogenic hydrogen storage container provided by the present invention;

[0042] Figure 2 This is a schematic diagram of the cross-sectional structure of the vehicle-mounted cryogenic hydrogen storage container provided by the present invention.

[0043] The figure shows:

[0044] DETAILED DESCRIPTION

[0045] The present invention will be described in detail below with reference to specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those skilled in the art, several changes and improvements can be made without departing from the scope of the present invention. These all fall within the scope of protection of the present invention.

[0046] The present invention provides a vehicle-mounted cryogenic hydrogen storage container, which stores liquid hydrogen at an ultra-low temperature close to absolute zero, i.e., -253°C. Figure 1 This is a schematic structural diagram of the vehicle-mounted cryogenic hydrogen storage container provided by the present invention, comprising: a metal liner 1, a composite material wrapping layer 2, an insulation structure 3, a support structure 5, and a pipeline 6;

[0047] The outer surface of the metal liner 1 is sequentially coated with a composite material winding layer 2 and an insulation structure 3, and then fixed to the inside of the metal shell 4 through multiple groups of supporting structures 5 to form a closed vacuum chamber 7; the inner cavity of the metal liner 1 is connected to the outside through a pipeline 6.

[0048] The metal liner 1 is a cylindrical structure of stainless steel or aluminum alloy, which is composed of a cylindrical section and two end caps welded together. Considering the fatigue caused by repeated filling, the wall thickness of the metal liner 1 is 3-4 mm.

[0049] The composite wrapping layer 2 includes an impermeability layer 21, a pressure-bearing layer 22, and a barrier layer 23. The introduction of the composite wrapping layer 2 not only enables supercritical hydrogen filling, increasing hydrogen storage density, but also significantly increases the critical safety pressure of the hydrogen storage container, extending the time from filling to discharge.

[0050] Considering that composite materials exhibit lower gas leakage and outgassing performance than metal materials, directly using a traditional composite wrapping layer would negatively impact the vacuum level within the hydrogen storage container's sealed vacuum chamber 7, thereby compromising thermal insulation performance. Therefore, the composite wrapping layer 2 is divided into three parts: the innermost layer is an impermeable layer 21, a dense, resin-rich structure composed of resin and low-permeability non-metallic materials, with a thickness of 0.01-0.05mm, to reduce composite gas leakage; the middle layer is a pressure-bearing layer 22, a composite structure composed of carbon fiber and cryogenic resin, with a thickness of 8-15mm, which, together with the metal liner 1, bears the full internal pressure; and the outermost layer is a barrier layer 23, a fluoroplastic or vinyl acetate butyl coating, with a thickness of 1-2mm, to reduce composite gas outgassing.

[0051] The thermal insulation structure 3 is a multi-layer structure of aluminum-plated composite film and fiber cloth laid layer by layer, with a thickness of 10-30 mm, to reduce radiation heat leakage.

[0052] The metal shell 4 adopts a stainless steel or aluminum alloy cylindrical structure, which is composed of a cylindrical section and two end heads welded together. The metal shell 4 needs to withstand external pressure and has a wall thickness of 2-4 mm.

[0053] The support structure 5, which connects the inner and outer shells of a cryogenic hydrogen storage vessel, is required to minimize heat leakage while maintaining satisfactory mechanical properties. This support structure 5 comprises a front support ring 51, a rear support ring 52, a front support seat 53, a rear support seat 54, a front radial pull wire 55, a rear radial pull wire 56, and an axial pull wire 57.

[0054] The front support ring 51 and the rear support ring 52 have the same structure, either a metal ring or a composite ring. Metal rings are separately manufactured and bonded to the ends of the cylindrical section of the composite wrap 2. Composite rings can be machined after being laid and cured together with the composite wrap 2.

[0055] The front support ring 51 and the rear support ring 52 have the same structure, are metal ring structures, and are fixed to the two ends of the inner surface of the cylindrical section of the metal shell 4 by welding or bonding.

[0056] The outer surfaces of the front supporting ring 51 and the rear supporting ring 52 are respectively evenly distributed circumferentially with 12-24 mounting hole ears for connecting the front radial traction wire 55 and the rear radial traction wire 56; the inner surfaces of the front supporting seat 53 and the rear supporting seat 54 are respectively evenly distributed circumferentially with 12-24 mounting hole ears for connecting the front radial traction wire 55 and the rear radial traction wire 56.

[0057] The front radial traction wire 55, the rear radial traction wire 56 and the axial traction wire 57 are woven from 5-10 strands of carbon fiber yarns. Compared with the traditional metal support structure, the thermal conductivity of the carbon fiber yarn is greatly reduced, and the heat leakage is greatly reduced.

[0058] In order to meet the mechanical resistance of the cryogenic hydrogen storage container, the front radial traction wire 55 and the rear radial traction wire 56 are used to achieve radial support, and the axial traction wire 57 achieves axial support; the number of the front radial traction wire 55 and the rear radial traction wire 56 is the same, both of which are 12-24; the two ends of the front radial traction wire 55 are respectively connected and fixed to the mounting holes of the front support ring 51 and the front support seat 53, and the two ends of the rear radial traction wire 56 are respectively connected and fixed to the mounting holes of the rear support ring 52 and the rear support seat 54, and each front radial traction wire 55 and rear radial traction wire 56 is tangent to the outer circle of the front support ring 51 and the rear support ring 52 respectively; in this way, the traction wire is in a tensile state for any radial load, and the carbon fiber fiber gives full play to its high tensile properties, thereby ensuring the stability of the metal liner 1.

[0059] The axial traction wires 57 are divided into two groups, with 12-24 wires in each group. The two ends of one group of traction wires are respectively connected and fixed to the mounting holes of the front support ring 51 and the rear support seat 54, and the two ends of the other group of traction wires are respectively connected and fixed to the mounting holes of the rear support ring 52 and the front support seat 53; in this way, the traction wires are in a tensile state under any axial load, and the carbon fiber wire fully exerts its high tensile properties, thereby ensuring the stability of the metal liner 1.

[0060] The pipeline 6 includes a filling supply pipeline 61 and a pressure relief pipeline 62; the filling supply pipeline 61 is used to fill the inner cavity of the metal liner 1 with low-pressure liquid hydrogen; when the pressure limit of the composite material winding layer 2 is reached, the gas phase is released through the pressure relief pipeline 62 to reduce the inner cavity pressure of the metal liner 1.

[0061] The vacuum degree of the sealed vacuum chamber 7 is not higher than 10 -5 Pa.

[0062] The basic embodiments of the present application are described above. The present application will be described in more detail below in conjunction with preferred examples and / or variations of the basic embodiments.

[0063] Example 1

[0064] like Figure 1 、 Figure 2 As shown, a vehicle-mounted cryogenic hydrogen storage container includes a metal liner 1, a composite material winding layer 2, an insulation structure 3, a metal shell 4, and a support structure 5;

[0065] The composite winding layer 2 includes: an anti-seepage layer 21, a pressure-bearing layer 22 and a barrier layer 23;

[0066] The support structure 5 includes: a front support ring 51, a rear support ring 52, a front support seat 53, a rear support seat 54, a front radial traction wire 55, a rear radial traction wire 56 and an axial traction wire 57;

[0067] The pipeline 6 includes a filling supply pipeline 61 and a pressure relief pipeline 62; the filling supply pipeline 61 is used to fill the inner cavity of the metal liner 1 with low-pressure liquid hydrogen; when the pressure limit of the composite material winding layer 2 is reached, the gas phase is released through the pressure relief pipeline 62 to reduce the inner cavity pressure of the metal liner 1.

[0068] The outer surface of the metal liner 1 is sequentially coated with a composite material wrapping layer 2 and an insulation structure 3, and then fixed to the inside of the metal shell 4 through a supporting structure 5 to form a closed vacuum chamber 7; the inner cavity of the metal liner 1 is connected to the outside through a pipeline 6.

[0069] The cryogenic storage container fills the inner cavity of the metal liner 1 with low-pressure liquid hydrogen through the filling supply pipeline 61. The high pressure resistance of the composite material wrapping layer 2, the low heat leakage of the insulation structure 3 and the support structure 5, and the high vacuum degree of the sealed vacuum chamber 7 realize long-term zero-loss storage of hydrogen. When the pressure limit of the composite material wrapping layer 2 is reached, the gas phase is released through the pressure relief pipeline 62 to reduce the inner cavity pressure of the metal liner 1.

[0070] Specifically, in this embodiment, the metal liner 1 and the metal shell 4 are stainless steel cylindrical structures, which are welded by cylindrical sections and end caps; the wall thickness of the metal liner 1 is 3 mm, and the wall thickness of the metal shell 4 is 4 mm;

[0071] Specifically, in this embodiment, the anti-seepage layer 21 is a dense, rubber-rich structure composed of resin and low-permeability non-metal, with a thickness of 0.05 mm; the pressure-bearing layer 22 is a composite structure composed of carbon fiber and cryogenic resin, with a thickness of 15 mm; the barrier layer 23 is a fluoroplastic coating, with a thickness of 1 mm;

[0072] Specifically, in this embodiment, the thermal insulation structure 3 is a multi-layer structure of aluminum-plated composite film and fiber cloth laid layer by layer, with a thickness of 30 mm;

[0073] Specifically, in this embodiment, the vacuum degree of the sealed vacuum chamber 7 is 10 -5 Pa;

[0074] Specifically, in this embodiment, the front support ring 51 and the rear support ring 52 have the same structure, and the front support seat 53 and the rear support seat 54 have the same structure; the front support ring 51 and the rear support ring 52 are metal ring structures that are glued and fixed to the outside of the composite material winding layer 2; the front support seat 53 and the rear support seat 54 are metal ring structures that are welded and fixed to the inner surface of the cylindrical section of the metal shell 4;

[0075] Specifically, in this embodiment, the outer surfaces of the front supporting ring 51 and the rear supporting ring 52 are respectively uniformly distributed circumferentially with 12 mounting hole lugs for connecting the front radial traction wire 55 and the rear radial traction wire 56; the inner surfaces of the front supporting seat 53 and the rear supporting seat 54 are respectively uniformly distributed circumferentially with 12 mounting hole lugs for connecting the front radial traction wire 55 and the rear radial traction wire 56;

[0076] Specifically, in this embodiment, the front radial traction wire 55, the rear radial traction wire 56 and the axial traction wire 57 are woven from five strands of carbon fiber wire;

[0077] Specifically, in this embodiment, the number of the front radial traction wires 55 and the rear radial traction wires 56 is the same, both of which are 12; the two ends of the front radial traction wire 55 are respectively connected and fixed to the mounting holes of the front supporting ring 51 and the front supporting seat 53, and the two ends of the rear radial traction wire 56 are respectively connected and fixed to the mounting holes of the rear supporting ring 52 and the rear supporting seat 54, and each front radial traction wire 55 and rear radial traction wire 56 is tangent to the outer circle of the front supporting ring 51 and the rear supporting ring 52 respectively;

[0078] Specifically, in this embodiment, the axial traction wires 57 are divided into two groups, with 12 wires in each group. The two ends of one group of traction wires are respectively connected and fixed to the mounting holes of the front support ring 51 and the rear support seat 54, and the two ends of the other group of traction wires are respectively connected and fixed to the mounting holes of the rear support ring 52 and the front support seat 53.

[0079] Example 2

[0080] This embodiment is an improvement based on embodiment 1.

[0081] Specifically, in this embodiment, the metal liner 1 and the metal shell 4 adopt an aluminum alloy cylindrical structure;

[0082] Specifically, in this embodiment, the barrier layer 23 is a butyl vinyl acetate coating with a thickness of 2 mm;

[0083] Specifically, in this embodiment, the vacuum degree of the sealed vacuum chamber 7 is 10 -6 Pa;

[0084] Specifically, in this embodiment, the front support ring 51 and the rear support ring 52 are composite annular structures that are machined after being laid and cured together with the composite winding layer 2 .

[0085] In the description of this application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0086] The above describes specific embodiments of the present invention. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art may make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. The embodiments of this application and the features in the embodiments may be combined with each other in any manner unless there is a conflict.

Claims

1. A vehicle-mounted cryogenic hydrogen storage container, characterized in that: include: A metal liner (1), a composite material winding layer (2), a thermal insulation structure (3), a supporting structure (5), and a pipeline (6); The outer surface of the metal liner (1) is sequentially coated with a composite material winding layer (2) and a heat-insulating structure (3), and then fixed to the inside of the metal shell (4) via multiple groups of the supporting structures (5), thereby forming a sealed vacuum cavity (7); the inner cavity of the metal liner (1) is connected to the outside world via a pipeline (6).

2. The vehicle-mounted cryogenic hydrogen storage container according to claim 1, characterized in that: The composite material winding layer (2) comprises: an anti-seepage layer (21), a pressure-bearing layer (22) and a barrier layer (23); The innermost layer is an anti-seepage layer (21) to reduce air leakage of the composite material; the middle layer is a pressure-bearing layer (22) which, together with the metal liner (1), bears the entire internal pressure; and the outermost layer is a barrier layer (23) to reduce air release of the composite material.

3. The vehicle-mounted cryogenic hydrogen storage container according to claim 1, characterized in that: The support structure (5) comprises: a support ring (51), a rear support ring (52), a front support seat (53), a rear support seat (54), a front radial traction wire (55), a rear radial traction wire (56) and an axial traction wire (57); The front support ring (51) and the rear support ring (52) are arranged on the outside of the composite material winding layer (2); the front support seat (53) and the rear support seat (54) are fixed on the inner surface of the metal shell (4); There are multiple front radial traction wires (55) and rear radial traction wires (56) to achieve radial support; The axial traction wires (57) are multiple and realize axial support; The two ends of the front radial traction wire (55) are respectively connected and fixed to the front support ring (51) and the front support seat (53), and the two ends of the rear radial traction wire (56) are respectively connected and fixed to the rear support ring (52) and the rear support seat (54); each front radial traction wire (55) and rear radial traction wire (56) are tangent to the outer circle of the front support ring (51) and the rear support ring (52); The axial traction wires (57) are divided into two groups; the two ends of one group of traction wires are respectively connected and fixed to the front support ring (51) and the rear support seat (54); the two ends of the other group of traction wires are respectively connected and fixed to the rear support ring (52) and the front support seat (53).

4. The vehicle-mounted cryogenic hydrogen storage container according to claim 3, characterized in that: The front support ring (51) and the rear support ring (52) have the same structure, and are a metal ring structure that is glued and fixed to the outside of the composite material winding layer (2) or a composite material ring structure that is machined after being laid and cured together with the composite material winding layer (2); The front support seat (53) and the rear support seat (54) have the same structure and are metal ring structures fixed to the inner surface of the cylindrical section of the metal shell (4) by welding or bonding.

5. The vehicle-mounted cryogenic hydrogen storage container according to claim 3, characterized in that: The outer surfaces of the front supporting ring (51) and the rear supporting ring (52) are respectively uniformly distributed circumferentially with 12 to 24 mounting hole lugs for connecting the front radial traction wire (55) and the rear radial traction wire (56); The inner surfaces of the front support seat (53) and the rear support seat (54) are respectively uniformly distributed circumferentially with 12-24 mounting hole lugs for connecting the front radial traction wire (55) and the rear radial traction wire (56); The number of the front radial traction wires (55) and the rear radial traction wires (56) is the same, and both are 12-24; The two ends of the front radial traction wire (55) are respectively connected and fixed to the mounting holes of the front support ring (51) and the front support seat (53); the two ends of the rear radial traction wire (56) are respectively connected and fixed to the mounting holes of the rear support ring (52) and the rear support seat (54); The axial traction wires (57) are divided into two groups, each group having 12-24 wires; the two ends of one group of traction wires are respectively connected and fixed to the mounting holes of the front support ring (51) and the rear support seat (54), and the two ends of the other group of traction wires are respectively connected and fixed to the mounting holes of the rear support ring (52) and the front support seat (53).

6. The vehicle-mounted cryogenic hydrogen storage container according to claim 1, characterized in that: The metal liner (1) and the metal shell (4) are made of stainless steel or aluminum alloy cylindrical structures, and are formed by welding a cylindrical section and end caps at both ends; The wall thickness of the metal liner (1) is 3-4 mm; the wall thickness of the metal shell (4) is 2-4 mm.

7. The vehicle-mounted cryogenic hydrogen storage container according to claim 2, characterized in that: The anti-seepage layer (21) is a dense, resin-rich structure composed of resin and low-permeability non-metal, with a thickness of 0.01-0.05 mm; The pressure-bearing layer (22) is a composite structure composed of carbon fiber and cryogenic resin, with a thickness of 8-15 mm; The barrier layer (23) is a fluoroplastic or butyl vinyl acetate coating with a thickness of 1-2 mm.

8. The vehicle-mounted cryogenic hydrogen storage container according to claim 1, characterized in that: The thermal insulation structure (3) is a multi-layer structure of aluminum-plated composite film and fiber cloth laid layer by layer, with a thickness of 10-30 mm; The vacuum degree of the sealed vacuum chamber (7) is not higher than 10 -5 Pa.

9. The vehicle-mounted cryogenic hydrogen storage container according to claim 3, characterized in that: The front radial traction wire (55), the rear radial traction wire (56) and the axial traction wire (57) are woven from 5 to 10 strands of carbon fiber wire.

10. The vehicle-mounted cryogenic hydrogen storage container according to claim 1, characterized in that: The pipeline (6) includes a filling supply pipeline (61) and a pressure relief pipeline (62); The filling supply pipeline (61) is used to fill the inner cavity of the metal liner (1) with low-pressure liquid-phase hydrogen; When the pressure limit of the composite material winding layer (2) is reached, gas phase is released through the pressure relief pipeline (62) to reduce the inner cavity pressure of the metal liner (1).

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