On-board hydrogen system and vehicle

Abstract

The utility model discloses an on-board hydrogen system and a vehicle, and relates to the field of vehicle technology. The on-board hydrogen system includes: a gas storage bottle, a hydrogen fuel cell and a low-pressure gas supply pipeline structure. Among them, the low-pressure gas supply pipeline structure includes: a first hard pipe section, a hose section and a second hard pipe section. One end of the first hard pipe section is connected to the gas storage bottle, one end of the hose section is connected to one end of the first hard pipe section, one end of the second hard pipe section is connected to the hydrogen fuel cell, and the other end of the second hard pipe section is connected to the other end of the hose section and is close to the hydrogen fuel cell. The on-board hydrogen system of the present application can improve the stability and reliability of hydrogen transportation and is easy to install.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a vehicle-mounted hydrogen system and a vehicle. Background Art

[0002] With the continuous development of the fuel cell vehicle industry, the number of supporting models has gradually increased. Due to the portability and flexibility of new energy commercial vehicles in urban logistics and inter-city logistics, they are increasingly favored by the transportation industry. Among them, hydrogen fuel vehicles have advantages over pure electric vehicles such as long driving range and short hydrogen refueling time, which has led to an increasing proportion of hydrogen fuel cell vehicles and an increasing requirement for fuel cell vehicle-mounted hydrogen systems. As a result, the performance of hydrogen fuel cell vehicle-mounted hydrogen systems has gradually become a focus of attention.

[0003] In the prior art, the gas supply pipeline structure adopts all-rigid pipes or all-flexible pipes to transport hydrogen, but the all-rigid pipe structure is difficult to install during the installation process, and there is a risk of deformation and breakage under vibration. The all-flexible pipe structure has weak rigidity and requires more fixed support structures to be set for the gas supply pipeline structure, which also increases the difficulty of installation. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a vehicle-mounted hydrogen system that can improve the stability and reliability of hydrogen delivery and is easy to install.

[0005] The utility model also provides a vehicle with the above-mentioned on-board hydrogen system.

[0006] According to an embodiment of the utility model, the on-board hydrogen system includes: a gas storage bottle; a hydrogen fuel cell; a low-pressure gas supply pipeline structure, which includes: a first hard pipe section, one end of which is connected to the gas storage bottle; a soft pipe section, one end of which is connected to one end of the first hard pipe section; a second hard pipe section, one end of which is connected to the hydrogen fuel cell, and the other end of the second hard pipe section is connected to the other end of the soft pipe section and is close to the hydrogen fuel cell.

[0007] According to the vehicle-mounted hydrogen system of the embodiment of the utility model, by connecting the first hard pipe section and the second hard pipe section at both ends of the hose section, respectively, the deformation or breakage of the connection between the hose section and the first hard pipe section and the second hard pipe section can be reduced or avoided. And the second hard pipe section is close to the hydrogen fuel cell as a whole, which can reduce or avoid the second hard pipe section being directly affected by the vibration of the frame, and improve the structural stability of the second hard pipe section. Thereby, the structural stability of the low-pressure gas supply pipeline structure can be improved, and the stability and reliability of the gas storage bottle delivering hydrogen to the hydrogen fuel cell through the low-pressure gas supply pipeline structure can be improved. At the same time, by bending the bending section, the relative position setting between the first hard pipe section and the second hard pipe section is made more flexible, reducing the space requirement for the arrangement of the low-pressure gas supply pipeline structure, and reducing the difficulty of installing the low-pressure gas supply pipeline structure.

[0008] In some embodiments, the on-board hydrogen system further includes: a self-tight joint, wherein the self-tight joint is provided at an end of the first hard pipe section and / or the second hard pipe section away from the soft pipe section.

[0009] Furthermore, the self-tight joint includes: an inner pipe head, the end of which forms a flange, and the inner pipe head is formed at one end of the first hard pipe section or the second hard pipe section away from the soft pipe section; a clamping nut, the clamping nut having an external thread, and the end face of the clamping nut abuts against the flange; the air inlet of the hydrogen fuel cell has an internal thread that matches the external thread.

[0010] In some embodiments, the flange is formed integrally by extrusion of the inner pipe head.

[0011] In some embodiments, the inner pipe head includes a guide surface, the guide surface is located on a side of the flange away from the compression nut, and an outer diameter of the guide surface gradually decreases in a direction away from the flange.

[0012] In some embodiments, the hose section includes at least two radially distributed layers, at least one layer is a braided layer, and / or at least one layer is a metal bellows layer.

[0013] In some embodiments, the hose segment includes a metal layer, and the metal layer of the hose segment is welded to the first hard pipe segment and the second hard pipe segment.

[0014] Furthermore, the ends of the first hard pipe section and the second hard pipe section are respectively provided with collars sleeved on the soft pipe section.

[0015] In some embodiments, the first hard tube segment and / or the second hard tube segment is a bent tube, and a bending radius of the bent tube is greater than or equal to twice the outer diameter of the bent tube.

[0016] The vehicle according to the embodiment of the utility model comprises: a vehicle frame; and the on-board hydrogen system as described in the above embodiment, wherein the on-board hydrogen system is installed on the vehicle frame.

[0017] According to the vehicle of the embodiment of the utility model, by adopting the vehicle-mounted hydrogen system of the above embodiment, the first hard pipe section and the second hard pipe section are respectively connected at both ends of the hose section, which can reduce or avoid the deformation or breakage of the connection between the hose section and the first hard pipe section and the second hard pipe section. And the second hard pipe section is close to the hydrogen fuel cell as a whole, which can reduce or avoid the second hard pipe section being directly affected by the vibration of the frame, and improve the structural stability of the second hard pipe section. Thereby, the structural stability of the low-pressure gas supply pipeline structure can be improved, and the stability and reliability of the gas storage bottle delivering hydrogen to the hydrogen fuel cell through the low-pressure gas supply pipeline structure can be improved. At the same time, by bending the bending section, the relative position setting between the first hard pipe section and the second hard pipe section is more flexible, reducing the space requirement for the arrangement of the low-pressure gas supply pipeline structure, and reducing the installation difficulty of the low-pressure gas supply pipeline structure.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a low-pressure gas supply pipeline structure of a vehicle-mounted hydrogen system according to an embodiment of the utility model;

[0020] Figure 2 It is a structural schematic diagram of the low-pressure gas supply pipeline structure of the vehicle-mounted hydrogen system at the self-sealing joint according to an embodiment of the utility model;

[0021] Figure 3 yes Figure 2 A cross-sectional structural diagram of a low-pressure gas supply pipeline structure of the illustrated embodiment;

[0022] Figure 4 yes Figure 3 A schematic diagram of the enlarged structure shown in the middle A;

[0023] Figure 5 It is a structural schematic diagram of a vehicle according to an embodiment of the utility model.

[0024] Reference numerals:

[0025] Low-pressure gas supply pipeline structure 100,

[0026] The first hard pipe section 10,

[0027] Hose section 20,

[0028] The second hard pipe section 30,

[0029] Self-tight joint 40, inner pipe head 41, flange 411, guide surface 412, compression nut 42,

[0030] A hydrogen fuel cell 200 , a gas cylinder 300 , a vehicle frame 400 , and a vehicle 1000 . DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0032] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the applicability of other processes and / or the use of other materials.

[0033] The on-board hydrogen system and the vehicle 1000 according to an embodiment of the present utility model are described below with reference to the accompanying drawings.

[0034] like Figure 1 As shown, the vehicle-mounted hydrogen system according to the embodiment of the utility model includes: a gas storage bottle 300, a hydrogen fuel cell 200 and a low-pressure gas supply pipeline structure 100. Among them, the low-pressure gas supply pipeline structure 100 includes: a first hard pipe section 10, a soft pipe section 20 and a second hard pipe section 30. Among them, one end of the first hard pipe section 10 is connected to the gas storage bottle 300, one end of the soft pipe section 20 is connected to one end of the first hard pipe section 10, one end of the second hard pipe section 30 is connected to the hydrogen fuel cell 200, and the other end of the second hard pipe section 30 is connected to the other end of the soft pipe section 20 and is close to the hydrogen fuel cell 200.

[0035] It can be understood that the gas cylinder 300 and the hydrogen fuel cell 200 are respectively fixed on the frame 400 structure, the gas cylinder 300 is subject to vibration from the frame 400, and the hydrogen fuel cell 200 is also subject to vibration from the frame 400, and the hydrogen fuel cell 200 and the gas cylinder 300 have different vibration frequencies due to their different structures, and the vibration of the gas cylinder 300 is transmitted to the first hard pipe segment 10, and the vibration of the hydrogen fuel cell 200 is transmitted to the second hard pipe segment 30, resulting in different vibration frequencies between the first hard pipe segment 10 and the second hard pipe segment 30.

[0036] Therefore, by setting the hose section 20 to connect the first hard pipe section 10 and the second hard pipe section 30, the hose section 20 can absorb and filter the vibrations from the first hard pipe section 10 and the second hard pipe section 30 at the same time, reduce or avoid the vibration of the first hard pipe section 10 being transmitted to the second hard pipe section 30 through the hose section 20, and also reduce or avoid the vibration of the second hard pipe section 30 being transmitted to the first hard pipe section 10 through the hose section 20, so that the overall vibration frequency of the first hard pipe section 10 remains consistent, the overall vibration frequency of the second hard pipe section 30 remains consistent, and the hose section 20 itself is not easy to break when subjected to vibrations of different frequencies at both ends, and can maintain the connection stability between the two ends of the hose section 20 and the first hard pipe section 10 and the second hard pipe section 30 respectively.

[0037] In addition, the connection position of the second hard pipe section 30 and the hose section 20 is close to the hydrogen fuel cell 200, so that the overall position of the second hard pipe section 30 can be close to the hydrogen fuel cell 200, which can reduce or avoid the second hard pipe section 30 being directly affected by the vibration of the frame 400, so that the overall vibration source of the second hard pipe section 30 is mainly the hydrogen fuel cell 200, thereby reducing or avoiding the shear force generated on the second hard pipe section 30 due to the simultaneous exposure to different vibration frequencies, and improving the structural stability of the second hard pipe section 30. When it is necessary to set a support structure for the second hard pipe section 30, it is also convenient to set the support structure on the hydrogen fuel cell 200, so that the vibration frequencies of the hydrogen fuel cell 200, the support structure and the second hard pipe section 30 can be consistent, so as to ensure the structural stability of the second hard pipe section 30.

[0038] The vehicle-mounted hydrogen system of the present application can reduce or avoid deformation or breakage of the connection between the hose section 20 and the first hard pipe section 10 and the second hard pipe section 30 by connecting the first hard pipe section 10 and the second hard pipe section 30 at both ends of the hose section 20. And the second hard pipe section 30 is close to the hydrogen fuel cell 200 as a whole, which can reduce or avoid the second hard pipe section 30 being directly affected by the vibration of the frame 400, and improve the structural stability of the second hard pipe section 30. Thereby, the structural stability of the low-pressure gas supply pipeline structure 100 can be improved, and the stability and reliability of the gas cylinder 300 delivering hydrogen to the hydrogen fuel cell 200 through the low-pressure gas supply pipeline structure 100 can be improved. At the same time, by bending the bending section, the relative position setting between the first hard pipe section 10 and the second hard pipe section 30 is more flexible, reducing the space requirement for the arrangement of the low-pressure gas supply pipeline structure 100, and reducing the installation difficulty of the low-pressure gas supply pipeline structure 100.

[0039] Preferably, the gas cylinder 300 is provided with a pressure reducing valve at the end, and the first hard pipe section 10 is connected to the pressure reducing valve at the end of the gas cylinder 300 .

[0040] Preferably, the first hard pipe section 10 is fixed to the vehicle frame 400 through a supporting structure, and the second hard pipe section 30 is fixed to the hydrogen fuel cell 200 through a supporting structure, so that the vibration source of the first hard pipe section 10 is mainly the vehicle frame 400, and the main vibration source of the second hard pipe section 30 is the hydrogen fuel cell 200. In this way, the vibration frequency of the first hard pipe section 10 and the vehicle frame 400 can be kept consistent, and the vibration frequency of the second hard pipe section 30 and the hydrogen fuel cell 200 can be kept consistent, so as to reduce or avoid the shear force generated on the first hard pipe section 10 or the second hard pipe section 30 due to the different vibration frequencies at the same time, thereby reducing or avoiding the risk of the first hard pipe section 10 and the second hard pipe section 30 themselves being broken, and improving the stability of the structure of the first hard pipe section 10 and the second hard pipe section 30 themselves.

[0041] Preferably, the first hard pipe section 10 and the second hard pipe section 30 are stainless steel pipes, and the material thereof is stainless steel 316L, which can effectively reduce the influence of hydrogen embrittlement.

[0042] In some embodiments, Figure 1-Figure 4 As shown, the on-board hydrogen system also includes: a self-tight joint 40, which is arranged at the end of the first hard pipe section 10 or the second hard pipe section 30 away from the hose section 20, or, while the self-tight joint 40 is arranged at the end of the first hard pipe section 10 away from the hose section 20, the self-tight joint 40 is also arranged at the end of the second hard pipe section 30 away from the hose section 20.

[0043] Therefore, the low-pressure gas supply pipeline structure 100 is connected to the gas cylinder 300 or the hydrogen fuel cell 200 through the self-tight joint 40, which simplifies the installation operation of connecting the low-pressure gas supply pipeline structure 100 to the gas cylinder 300 and the hydrogen fuel cell 200, and can realize a quick and detachable connection between the low-pressure gas supply pipeline structure 100 and the gas cylinder 300 and the hydrogen fuel cell 200.

[0044] exist Figure 1 In the example, the end of the second hard pipe section 30 away from the hose section 20 is provided with a self-sealing joint 40, and the self-sealing joint 40 is connected to the hydrogen fuel cell 200. The end of the first hard pipe section 10 away from the hose section 20 is provided as a straight pipe, which is directly connected to the gas outlet of the hydrogen cylinder.

[0045] Furthermore, if Figure 3 , Figure 4 As shown, the self-tight joint 40 includes: an inner pipe head 41 and a compression nut 42. The end of the inner pipe head 41 forms a flange 411, and the inner pipe head 41 is formed at one end of the first hard pipe section 10 or the second hard pipe section 30 away from the hose section 20. The compression nut 42 has an external thread, and the end face of the compression nut 42 abuts against the flange 411, and the air inlet of the hydrogen fuel cell 200 has an internal thread that matches the external thread.

[0046] It can be understood that the inner tube head 41 is axially docked with the air inlet of the gas cylinder 300 or the hydrogen fuel cell 200, and the clamping nut 42 is used to fix the inner tube head 41 to the gas cylinder 300 or the hydrogen fuel cell 200. When the self-tight joint 40 is connected to the gas cylinder 300 or the hydrogen fuel cell 200, the clamping nut 42 approaches the gas cylinder 300 or the hydrogen fuel cell 200, so that the clamping nut 42 stops against the flange 411 and drives the inner tube head 41 close to the gas cylinder 300 or the hydrogen fuel cell 200, so as to press the inner tube head 41 against and dock with the air inlet of the gas cylinder 300 or the hydrogen fuel cell 200.

[0047] Thus, the clamping nut 42 is connected to the gas cylinder 300 or the hydrogen fuel cell 200 through the external thread and the internal thread at the air inlet, thereby realizing a quick and detachable connection between the self-tight joint 40 and the gas cylinder 300 or the hydrogen fuel cell 200. At the same time, when the clamping nut 42 is connected to the gas cylinder 300 or the hydrogen fuel cell 200, it can limit the inner tube head 41 relative to the gas cylinder 300 or the hydrogen fuel cell 200, thereby keeping the inner tube firmly connected to the gas cylinder 300 or the hydrogen fuel cell 200.

[0048] In addition, the compression nut 42 can protect the inner tube head 41 and reduce or avoid damage to the inner tube head 41 caused by collision.

[0049] When the self-tight joint 40 is connected to the hydrogen storage bottle or the hydrogen fuel cell 200 , the inner tube section is first inserted into the docking structure of the hydrogen storage bottle or the hydrogen fuel cell 200 , and the compression nut 42 is stopped against the flange 411 .

[0050] Preferably, the compression nut 42 is a T-shaped locking nut.

[0051] It is understandable that when the compression nut 42 needs to be rotated, the T-shaped locking nut can have a larger force application surface, thereby facilitating installation using tools such as wrenches, ensuring that the T-shaped locking nut can be stably stressed and achieve threaded connection on the external thread.

[0052] Thus, the installation operation of connecting the self-sealing joint 40 to the gas cylinder 300 or the hydrogen fuel cell 200 can be facilitated, and the reliability of the installation can be ensured.

[0053] Preferably, the T-shaped locking nut is provided with silver electroplating at least on the external threads, which can improve the anti-loosening performance of the external threads of the locking nut 42.

[0054] Preferably, the compression nut 42 is made of stainless steel.

[0055] In the present application, there is no limitation on the shape of the T-shaped locking nut, and its end face used for applying force may be in a diamond, square, hexagon or other shapes.

[0056] In some embodiments, the flange 411 is formed integrally by extrusion of the inner tube head 41 .

[0057] Thus, the process of forming the flange 411 can be simplified, and it is convenient to cover the clamping nut 42 on the inner pipe head 41 before forming the flange 411 .

[0058] It should be noted that during the setting process of the self-tight joint 40, the clamping nut 42 is first sleeved on the inner pipe head 41, and then one end of the inner pipe head 41 is squeezed to form an integrally formed flange 411, so that the clamping nut 42 pre-sleeved on the inner pipe head 41 can abut against the flange 411.

[0059] In some embodiments, Figure 3 As shown, the inner pipe head 41 includes a guide surface 412 , which is located on a side of the flange 411 away from the compression nut 42 , and an outer diameter of the guide surface 412 gradually decreases in a direction away from the flange 411 .

[0060] Thus, when the inner tube head 41 is matched with the gas cylinder 300 or the hydrogen fuel cell 200, when the inner tube head 41 is close to its installation position in the gas cylinder 300 or the hydrogen fuel cell 200, the guide surface 412 can play a guiding role to improve the accuracy of its installation position. At the same time, when the inner tube head 41 is pressed against the gas cylinder 300 or the hydrogen fuel cell 200 by the clamping nut 42. The guide surface 412 can increase the contact area of ​​the inner tube head 41 along the circumferential direction of the gas cylinder 300 or the hydrogen fuel cell 200, thereby improving the sealing performance when docking with the hydrogen delivery channel of the gas cylinder 300 or the hydrogen fuel cell 200. At the same time, the sealing through the guide surface 412 can also have a good vibration resistance.

[0061] In some embodiments, the hose section 20 includes at least two radially distributed layers, at least one of which is a braided layer.

[0062] Therefore, the braided layer can have good ductility, which can improve the pressure-bearing capacity of the hose section 20, so that the hose section 20 can be used to transport hydrogen at a higher pressure, thereby improving the overall reliability and gas delivery stability of the hose section 20 and the low-pressure gas supply pipeline structure 100.

[0063] Preferably, the braided layer is a stainless steel braided layer, and its material is stainless steel 304, which has good ductility.

[0064] In some embodiments, the hose section 20 includes at least two radially distributed layers, at least one of which is a metal bellows layer.

[0065] It is understandable that the hose section 20 is exposed to hydrogen environment for a long time, which may easily cause hydrogen embrittlement of the hose section 20 .

[0066] Thus, the metal bellows layer can reduce the influence of hydrogen embrittlement and improve the durability of the hose section 20 .

[0067] Preferably, the metal bellows layer is a stainless steel tube, and its material is stainless steel 316L, which can effectively reduce the impact of hydrogen embrittlement.

[0068] In some specific embodiments, the inner layer of the hose section 20 is a metal bellows layer, and the outer layer is a braided layer. Thus, the metal bellows layer can be in a hydrogen environment in the inner layer, reducing the influence of hydrogen embrittlement on the hose section 20, and the braided layer provides support for the metal bellows layer in the circumferential direction in the outer layer, thereby improving the pressure bearing capacity of the hose section 20.

[0069] In some embodiments, the hose segment 20 includes a metal layer, and the metal layer of the hose segment 20 is welded to the first hard pipe segment 10 or the second hard pipe segment 30 , or the hose segment 20 is welded to both the first hard pipe segment 10 and the second hard pipe segment 30 .

[0070] Thus, the first hard pipe section 10, the hose section 20 and the second hard pipe section 30 are connected as a whole, which can facilitate the installation of the low-pressure gas supply pipeline structure 100 of the vehicle-mounted hydrogen system. At the same time, the setting of the pipeline connection structure between the hose section 20 and the first hard pipe section 10 and the second hard pipe section 30 can be reduced, thereby reducing or avoiding the risk of air leakage between the hose section 20 and the first hard pipe section 10 and the second hard pipe section 30.

[0071] Preferably, the hose section 20 and the first hard pipe section 10 or the second hard pipe section 30 are welded and connected by TIG welding, which can effectively reduce the generation of weld pores, improve the air tightness of the welded connection, and improve the air tightness between the hose section 20 and the first hard pipe section 10 or the second hard pipe section 30.

[0072] Furthermore, the ends of the first hard pipe section 10 and the second hard pipe section 20 are respectively provided with collars sleeved on the hose section 20. Thus, the collars can limit the bending angle of the hose section 20 at the connection between the ends of the first hard pipe section 10 and the second hard pipe section 20 and the hose section 20, reduce or avoid the disconnection of the hose section 20 from the first hard pipe section 10 and the second hard pipe section 30 caused by excessive bending angle at the connection position with the ends of the first hard pipe section 10 and the second hard pipe section 20, and improve the stability and reliability of the connection between the hose section 20 and the first hard pipe section 10 and the second hard pipe section 30.

[0073] In some embodiments, Figure 1 As shown, the first hard pipe section 10 or the second hard pipe section 30 is a bent pipe, or the first hard pipe section 10 and the second hard pipe section 30 are both bent pipes, and the bending radius of the bent pipe is greater than or equal to twice the outer diameter of the bent pipe.

[0074] It is understandable that the arrangement space of the first hard pipe section 10 and the second hard pipe section 30 between the gas storage bottle 300 and the hydrogen fuel cell 200 is easily blocked by other structures.

[0075] Therefore, by setting the first hard pipe section 10 or the second hard pipe section 30 as a bent pipe, the first hard pipe section 10 and the second hard pipe section 30 can avoid other structural settings, reducing the space size for arranging the low-pressure air supply pipeline structure 100.

[0076] It should be noted that when the first hard pipe section 10 or the second hard pipe section 30 is a bent pipe, there is no limit on the number of bends, and the number of bends is set according to the installation space of the low-pressure gas supply pipeline structure 100 and the position of the gas storage bottle 300 relative to the hydrogen fuel cell 200. For example, Figure 1 In the example of FIG. 1 , the first hard pipe section 10 is bent three times, and the second hard pipe section 30 is bent twice.

[0077] The vehicle 1000 according to the embodiment of the present utility model comprises: a vehicle frame 400 and the vehicle-mounted hydrogen system of the above embodiment, wherein the vehicle-mounted hydrogen system is mounted on the vehicle frame 400 .

[0078] The vehicle 1000 of the present application adopts the vehicle-mounted hydrogen system of the above embodiment, and the first hard pipe section 10 and the second hard pipe section 30 are respectively connected at both ends of the hose section 20, which can reduce or avoid the deformation or breakage of the connection between the hose section 20 and the first hard pipe section 10 and the second hard pipe section 30. And the second hard pipe section 30 is close to the hydrogen fuel cell 200 as a whole, which can reduce or avoid the second hard pipe section 30 being directly affected by the vibration of the frame 400, and improve the structural stability of the second hard pipe section 30. Thereby, the structural stability of the low-pressure gas supply pipeline structure 100 can be improved, and the stability and reliability of the gas cylinder 300 delivering hydrogen to the hydrogen fuel cell 200 through the low-pressure gas supply pipeline structure 100 can be improved. At the same time, by bending the bending section, the relative position setting between the first hard pipe section 10 and the second hard pipe section 30 is more flexible, reducing the space requirement for the arrangement of the low-pressure gas supply pipeline structure 100, and reducing the installation difficulty of the low-pressure gas supply pipeline structure 100.

[0079] The onboard hydrogen system and other structures and operations of the vehicle 1000 according to the embodiment of the utility model are well known to those skilled in the art and will not be described in detail here.

[0080] In the description of the present invention, it is necessary to understand that the terms "thickness", "up", "down", "front", "back", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 should not be understood as a limitation on the present invention.

[0081] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0082] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0083] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0084] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0085] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A vehicle-mounted hydrogen system, characterized in that: include: Gas cylinders; Hydrogen fuel cells; The low-pressure gas supply pipeline structure comprises: a first hard pipe section, one end of which is connected to the gas storage bottle; A hose segment, one end of which is connected to one end of the first hard tube segment; A second hard pipe segment, one end of which is connected to the hydrogen fuel cell, and the other end of which is connected to the other end of the soft pipe segment and is close to the hydrogen fuel cell.

2. The vehicle-mounted hydrogen system according to claim 1, characterized in that: Also includes: A self-tight joint, wherein the self-tight joint is arranged at an end of the first hard pipe section and / or the second hard pipe section away from the soft pipe section.

3. The vehicle-mounted hydrogen system according to claim 2, characterized in that: The self-sealing joint comprises: An inner pipe head, the end of which is formed with a flange, and the inner pipe head is formed at one end of the first hard pipe section or the second hard pipe section away from the soft pipe section; A clamping nut, wherein the clamping nut has an external thread, and an end surface of the clamping nut abuts against the flange; The air inlet of the hydrogen fuel cell has an internal thread matched with the external thread.

4. The vehicle-mounted hydrogen system according to claim 3, characterized in that: The flange is formed integrally by extrusion of the inner pipe head.

5. The vehicle-mounted hydrogen system according to claim 3, characterized in that: The inner pipe head comprises a guide surface, the guide surface is located at a side of the flange away from the compression nut, and the outer diameter of the guide surface gradually decreases in a direction away from the flange.

6. The vehicle-mounted hydrogen system according to claim 1, characterized in that: The hose section comprises at least two radially distributed layers, at least one of which is a braided layer, and / or, At least one layer is a metal bellows layer.

7. The vehicle-mounted hydrogen system according to any one of claims 1 to 6, characterized in that: The hose segment includes a metal layer, and the metal layer of the hose segment is welded to the first hard pipe segment and the second hard pipe segment.

8. The vehicle-mounted hydrogen system according to claim 7, characterized in that: The ends of the first hard pipe section and the second hard pipe section are respectively provided with collars sleeved on the soft pipe section.

9. The vehicle-mounted hydrogen system according to claim 1, characterized in that: The first hard pipe section and / or the second hard pipe section is a bent pipe, and a bending radius of the bent pipe is greater than or equal to twice the outer diameter of the bent pipe.

10. A vehicle, characterized in that: include: Frame; The on-vehicle hydrogen system as described in any one of claims 1-9, wherein the on-vehicle hydrogen system is mounted on the vehicle frame.

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