Hydrogen storage cylinder with external TPRD

Abstract

The utility model relates to the technical field of structural design of hydrogen storage cylinders, and particularly discloses a hydrogen storage cylinder with an external TPRD, which comprises a gas cylinder with the volume not less than 400L, a valve arranged at one end of the gas cylinder, and a tail plug detachably connected to the other end of the gas cylinder; the first TPRD is arranged on the tail plug and used for avoiding the detonation phenomenon of the part, close to the tail plug, in the gas cylinder; the second TPRD is arranged on the valve and used for avoiding the detonation phenomenon of the part, close to the valve, in the gas cylinder; the guide pipe extends to a position close to the middle of the gas cylinder along the side surface of the gas cylinder, one end penetrates through the tail plug and is communicated with the gas cylinder, and the other end is hollow and is used for releasing hydrogen; and the third TPRD is mounted on the guide pipe, is close to the middle part of the gas cylinder and is used for avoiding the detonation phenomenon of the middle part of the gas cylinder. The safety of the hydrogen storage cylinder can be improved.

Description

Technical Field

[0001] This utility model relates to the technical field of hydrogen storage cylinder structure design, and in particular to a hydrogen storage cylinder with an external TPRD. Background Technology

[0002] Hydrogen storage cylinders are containers specifically designed for the safe and efficient storage of high-pressure hydrogen, and are widely used in various scenarios, including fuel cell vehicles. These cylinders are typically manufactured using high-strength materials, such as carbon fiber reinforced composites, to ensure lightweight construction while withstanding high pressure. For safety, hydrogen storage cylinders are equipped with sophisticated safety relief devices that automatically activate upon detecting abnormally high temperatures or pressures, releasing internal pressure and preventing hazards caused by overpressure or overheating. With technological advancements, the design of hydrogen storage cylinders is continuously optimized to improve storage efficiency, increase capacity, and enhance safety to meet the growing demand for clean energy and stringent usage standards. However, large-capacity hydrogen storage cylinders still face challenges in extreme conditions, including difficulties in activating safety relief devices and performance degradation due to localized fires.

[0003] Current technical solutions for large-capacity hydrogen storage cylinders have numerous defects and shortcomings, which seriously affect their safety and reliability. Firstly, existing large-capacity hydrogen storage cylinders (e.g., those with a volume greater than 400L) typically employ a dual-end design, with a valve installed at one end and an independent safety relief device (PRD) at the other. The PRD is activated primarily in two ways: temperature-driven (TPRD) and pressure-driven (PPRD). However, in practical applications, both activation methods have significant limitations. Due to the large size of the cylinder, the PRD installed in a single location may not react promptly, easily leading to cylinder explosion.

[0004] Secondly, in practical applications, hydrogen storage cylinders often face more complex and dangerous scenarios. For example, when a vehicle engine catches fire, the cylinder, usually located behind the driver's cab, is directly burned by the flames, creating a localized, persistent fire. This localized fire not only makes it difficult to activate the safety relief device (PRD) in a single location on the cylinder, but also leads to significant degradation of the performance of the cylinder's fiber winding layer (especially carbon fiber material). As the primary pressure-bearing material, the degradation of carbon fiber directly weakens the cylinder's pressure-bearing capacity. Simultaneously, the internal temperature and pressure continue to rise, but if the activation conditions for the PRD are not met, the remaining pressure-bearing capacity of the cylinder has already exceeded its limit, leading to an explosion. The flammable gas from the explosion further ignites a deflagration, causing catastrophic consequences and posing a serious threat to personal safety and property. Utility Model Content

[0005] To improve the safety of hydrogen storage cylinders, this basic solution provides a hydrogen storage cylinder with an external TPRD.

[0006] A hydrogen storage cylinder with an external TPRD includes: a cylinder with a volume of not less than 400L, one end of which is equipped with a valve, and the other end is detachably connected to a tail plug; a first TPRD, which is installed on the tail plug and connected to the cylinder, and is used to prevent the cylinder from exploding due to a local fire near the tail plug; a second TPRD, which is installed on the valve and connected to the cylinder, and is used to prevent the cylinder from exploding due to a local fire near the valve; a first conduit, which extends along the side of the cylinder to a position near the middle of the cylinder, one end of which passes through the tail plug and connects to the cylinder, and the other end of which is used to discharge hydrogen to the outside of the vehicle; and a third TPRD, which is installed on the conduit and near the middle of the cylinder, and faces the vehicle engine, and is used to prevent the cylinder from exploding due to a local fire in the middle of the vehicle engine.

[0007] Beneficial effects: First, by installing a first TPRD, a second TPRD, and a third TPRD at the tail plug, valve, and center of the gas cylinder, respectively, the critical parts of the cylinder can be fully covered. This ensures that in the event of a localized fire, regardless of the location of the ignition source within the cylinder, the corresponding TPRD device can be activated promptly to rapidly release hydrogen, preventing deflagration due to localized overheating. The first and second TPRDs target the parts of the cylinder near the tail plug and valve, respectively, which are critical areas easily affected by external ignition sources during actual use. The third TPRD specifically targets the center of the cylinder, especially considering the possibility that flames from a car engine fire could directly scorch the center. This targeted design effectively prevents deflagration caused by localized overheating, significantly improving the cylinder's safety in extreme situations.

[0008] Secondly, the first conduit extends along the side of the gas cylinder to near the center, with one end passing through the tail plug to connect to the cylinder, and the other end used to discharge hydrogen to the outside of the vehicle. This conduit design not only provides a reliable discharge path for the third TPRD but also ensures that hydrogen can be safely discharged to the outside of the vehicle, preventing hydrogen accumulation inside the vehicle and further reducing safety risks. The third TPRD is installed on the conduit near the center of the gas cylinder, facing the vehicle's engine. This orientation design ensures that in the event of a fire in the vehicle's engine, the third TPRD can quickly detect and activate, directly discharging hydrogen to a safe area away from the engine and other critical parts of the vehicle, preventing secondary combustion caused by contact between hydrogen and flames.

[0009] Meanwhile, by installing multiple TPRD devices at different locations on the gas cylinder, a multi-layered protection mechanism is formed. This design not only improves the cylinder's response speed and reliability in the face of localized fires but also provides redundancy for the cylinder's safe operation. Even if one TPRD device fails, the others can still function, ensuring the cylinder's safety. This design can effectively cope with various complex operating conditions, such as localized fires and engine fires. In practical applications, hydrogen storage cylinders often face various unpredictable risks, and this multi-point protection design ensures that the cylinder maintains stable operation under various extreme conditions, improving the overall reliability of the system.

[0010] Finally, this design achieves comprehensive protection for the gas cylinder without adding excessive extra space. The distance between the first conduit and the gas cylinder is no more than 6mm. This compact design not only saves space but also ensures the structural compactness and stability of the entire system, making it better compatible with existing automotive hydrogen storage systems without requiring large-scale modifications to the vehicle's existing structure. Through the rational layout of the TPRD device and conduit, this design can be easily integrated into existing automotive hydrogen storage systems, reducing system complexity and cost, and improving its feasibility and promotional value in practical applications.

[0011] Preferably, it also includes a bracket, which is mounted around and fixedly installed on the surface of the gas cylinder, near the middle of the gas cylinder, and is used to support the first conduit.

[0012] Beneficial Effects: By adding a bracket that surrounds and securely mounts to the surface of the gas cylinder, a stable support structure is provided for the first conduit. This design ensures the robustness and stability of the first conduit on the side of the gas cylinder, preventing displacement or damage due to external forces or vibrations, thus guaranteeing the reliability of the hydrogen emission path. Simultaneously, the bracket helps optimize the conduit layout, making it fit more closely to the gas cylinder surface, further saving space and enhancing the overall system's structural compactness. Furthermore, the bracket's fixing effect improves the overall stability of the gas cylinder, enhancing its anti-interference capability under complex operating conditions, and further improving the safety and reliability of the hydrogen storage cylinder.

[0013] Preferably, the first conduit includes a first sub-tube and a second sub-tube connected in sequence; the first sub-tube passes through the tail plug and connects to the gas cylinder, and extends to the middle position near the side of the gas cylinder; one end of the third TPRD is connected to the first sub-tube, and the other end is connected to the second sub-tube; the second sub-tube is U-shaped and extends to the side near the end face of the tail plug, and is connected to a hydrogen exhaust pipe, which is used to exhaust hydrogen to the outside of the vehicle.

[0014] Beneficial Effects: By designing the first conduit to include a first sub-tube and a second sub-tube connected in sequence, the layout and function of the hydrogen emission path are optimized. The first sub-tube passes through the tail plug and connects to the gas cylinder, extending to the middle of the cylinder's side to ensure smooth hydrogen extraction from the cylinder's interior. The second sub-tube, U-shaped, extends circuitously to the side near the tail plug and connects to the hydrogen discharge pipe for safe hydrogen emission to the outside of the vehicle. This segmented design not only improves the conduit's flexibility and adaptability but also increases its length through the U-shaped structure, extending the hydrogen emission path and further reducing the risk of hazardous contact between hydrogen and the surrounding environment during emission. Simultaneously, the third TPRD, installed between the first and second sub-tubes, allows for more precise control of hydrogen emission, ensuring rapid and safe hydrogen release in emergencies and enhancing the safety and reliability of the hydrogen storage cylinder.

[0015] Preferably, the distance between the first conduit and the gas cylinder does not exceed 6 mm.

[0016] Beneficial effects: By limiting the distance between the first conduit and the gas cylinder to no more than 6mm, a tight fit between the conduit and the gas cylinder is ensured. This compact design not only saves space, making the entire hydrogen storage cylinder system lighter and smaller, facilitating installation and layout within limited vehicle space, but also enhances the structural stability between the conduit and the gas cylinder, reducing the risk of conduit loosening or damage due to external impacts or vibrations. Simultaneously, the smaller spacing effectively reduces the possibility of hydrogen leakage at the connection between the conduit and the gas cylinder, further improving the safety and sealing of the hydrogen storage cylinder, providing a reliable guarantee for the safe storage and release of hydrogen.

[0017] Preferably, the working pressure of the gas cylinder is 20-70 MPa.

[0018] Beneficial effects: The design clarifies the operating pressure range of the gas cylinder to 20-70 MPa. This range meets the high-pressure storage requirements of hydrogen storage cylinders in different application scenarios, while ensuring the safety and reliability of the cylinders under high-pressure conditions. By defining the operating pressure range, this design provides a clear basis for the structural design, material selection, and configuration of safety devices for the gas cylinder, enabling efficient hydrogen storage and transportation while ensuring safety. This improves the practicality and adaptability of the hydrogen storage cylinder and provides strong support for the widespread application of hydrogen energy.

[0019] Preferably, the angle between the third TPRD and the cross-section is no greater than 45°.

[0020] Beneficial effects: By limiting the angle between the third TPRD and the cross-section of the gas cylinder to no more than 45°, the third TPRD is ensured to be precisely and efficiently oriented towards the vehicle engine. This design allows the third TPRD to quickly detect high temperatures and activate promptly in the event of a fire in the vehicle engine, rapidly releasing hydrogen to a safe area, thus effectively preventing deflagration caused by a localized fire in the engine. Simultaneously, the optimized angle setting also improves the direction and path of hydrogen emission, further reducing the risk of hydrogen contact with flames and significantly improving the safety and reliability of the hydrogen storage cylinder under extreme conditions.

[0021] Preferably, it also includes a second conduit, wherein a first through hole is provided on the first TPRD and the first through hole is connected to the gas cylinder; one end of the second conduit is connected to the first through hole, and the other end is used to discharge hydrogen to the outside of the vehicle.

[0022] Beneficial Effects: By adding a second conduit and connecting the first through-hole on the first TPRD to the second conduit, the hydrogen emission path is further optimized. This design not only provides an additional emission channel for hydrogen, enhancing the redundancy of hydrogen emission, but also reduces the pressure and risk of a single emission point by dispersing emission points, thereby improving the safety and efficiency of hydrogen emission. Simultaneously, the second conduit allows hydrogen to be discharged from the cylinder more quickly, further enhancing the safety performance of the hydrogen storage cylinder in emergency situations and effectively reducing the risk of deflagration caused by hydrogen accumulation.

[0023] Preferably, the first TPRD is further provided with a first exhaust hole, which is opposite to and connected to the first through hole.

[0024] Beneficial effects: By opening a first vent hole on the first TPRD opposite to the first through hole, the hydrogen emission path and efficiency are further optimized. This design allows hydrogen to be emitted simultaneously through both the first through hole and the first vent hole, enhancing the redundancy and flexibility of hydrogen emission. Especially when the first TPRD is activated, hydrogen can be discharged from the cylinder more quickly, reducing the accumulation of pressure inside the cylinder. Simultaneously, this bidirectional emission design also reduces the safety risks caused by blockage or malfunction of a single emission path, further improving the safety and reliability of the hydrogen storage cylinder under extreme operating conditions.

[0025] Preferably, the distance between the first catheter and the second catheter is not less than 20 mm.

[0026] Beneficial effects: By specifying that the distance between the first and second conduits should be no less than 20mm, the rationality and independence of the spatial layout of the two conduits are ensured. This design avoids potential mutual interference or hydrogen backflow caused by conduits being too close together, ensuring the smoothness and safety of the hydrogen emission process. At the same time, sufficient spacing also facilitates the installation and maintenance of the conduits, further improving the stability and reliability of the entire hydrogen storage cylinder system.

[0027] Preferably, the valve has a second vent hole, which is connected to the second TPRD, so that when the second TPRD is activated, the hydrogen in the gas cylinder is discharged from the second vent hole.

[0028] Beneficial Effects: By opening a second vent port on the valve connected to the second TPRD, the hydrogen emission path is further optimized. When the second TPRD is activated, hydrogen can be quickly discharged from the cylinder through the second vent port, effectively reducing the internal pressure of the cylinder and preventing deflagration due to excessive pressure. This design not only improves the efficiency of hydrogen emission but also enhances the safety of the hydrogen storage cylinder in emergencies such as localized fires. Furthermore, it provides a dedicated channel for hydrogen emission in the valve area, further improving the overall safety protection system of the hydrogen storage cylinder.

[0029] Beneficial effects of this utility model

[0030] Especially in the fire test during type testing of large-capacity gas cylinders for vehicles, the flame length was 1650mm. When the cylinder length exceeds 1650mm (such as the common 2200mm or even longer), the center of the fire source is located in the middle of the cylinder, making it difficult to effectively activate the pressure relief devices at both ends of the cylinder. This design flaw prevents the cylinder from releasing internal pressure in a timely manner under extreme conditions, seriously threatening safety in use.

[0031] Compared to existing technologies, this invention, by equipping TPRDs at the front, middle, rear, and upper positions on a gas cylinder with a volume of at least 400L, ensures that even if an open flame affects the cylinder from any location in the vehicle, the corresponding TPRDs can react immediately and quickly activate, releasing hydrogen to a safe location to prevent cylinder explosion and thus improving cylinder safety. Furthermore, installing TPRDs at various positions requires minimal space, as they can be installed within the existing cylinder mounting areas of the vehicle. Moreover, in the event of a large open flame, multiple TPRDs can simultaneously release hydrogen, improving efficiency, increasing safety, and preventing cylinder combustion.

[0032] Specifically, firstly, the multi-directional layout of multiple TPRDs not only ensures accurate detection but also allows for simultaneous and rapid release, enhancing cylinder safety. One end of the cylinder is equipped with a valve, and the other end has a detachable tail plug. A first TPRD is installed on the tail plug, a second TPRD on the valve, and a third TPRD in the middle of the cylinder. By placing TPRDs on both sides and in the middle of the cylinder, it is possible to promptly detect any fires around the cylinder, thereby quickly activating and releasing the hydrogen gas to prevent deflagration and improve cylinder safety.

[0033] Secondly, the placement of the TPRD is scientific and reasonable. Since the car engine is generally located near the gas cylinder, the angle between the third TPRD and the cross-section is no greater than 45°. Whether in a collision or spontaneous combustion, the fire usually occurs near the engine. The third TPRD, positioned in the middle of the gas cylinder and facing the engine, can accurately and quickly detect whether combustion has occurred in the engine, thus preventing disruption to the normal use of the hydrogen cylinder. Attached Figure Description

[0034] Figure 1 This is a schematic diagram (a) of a hydrogen storage cylinder with an external TPRD, as shown in the embodiment, i.e., viewed from a side view.

[0035] Figure 2 This is a schematic diagram (b) of a hydrogen storage cylinder with an external TPRD, as shown in the embodiment, that is, viewed from a perspective close to the valve;

[0036] Figure 3 This is a schematic diagram (c) of a hydrogen storage cylinder with an external TPRD, as shown in the embodiment, that is, viewed from a perspective close to the tail plug;

[0037] Figure 4 This is a schematic diagram (d) of a hydrogen storage cylinder with an external TPRD, as shown in the embodiment, that is, viewed from another perspective close to the valve;

[0038] Figure 5 for Figure 4 An enlarged view of the area enclosed by the dashed circle;

[0039] Figure 6 Here is a schematic diagram of the structure of the second TPRD, where (a) is a schematic diagram of one side of the second TPRD and (b) is a schematic diagram of the other side of the second TPRD;

[0040] Figure 7 This is a structural diagram showing the arrangement of multiple gas cylinders and their relationship to the engine in the overall vehicle structure. Detailed Implementation

[0041] The reference numerals in the accompanying drawings include:

[0042] 1. Gas cylinder; 2. Valve; 3. Tail plug; 4. Bracket; 5. First conduit; 6. Third TPRD; 7. First sub-pipe; 8. Second sub-pipe; 9. First TPRD; 10. First exhaust port; 11. Automobile engine; 12. Second TRPD; 13. First through hole.

[0043] Example

[0044] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this embodiment provides a hydrogen storage cylinder 1 with an external TPRD, including a cylinder 1 with a volume of not less than 400L, a first TPRD 9, a second TPRD 12, a third TPRD 6, a first conduit 5, a support 4, and a second conduit.

[0045] Specifically, a valve 2 is provided at one end of the gas cylinder 1, and a tail plug 3 is detachably connected to the other end. In this embodiment, the detachable connection is a bolted connection. A first TPRD 9 is provided on the tail plug 3 and connected to the gas cylinder 1 to prevent the gas cylinder 1 from exploding due to a local fire near the tail plug 3. A second TPRD 12 is provided on the valve 2 and connected to the gas cylinder 1 to prevent the gas cylinder 1 from exploding due to a local fire near the valve 2. A first conduit 5 extends along the side of the gas cylinder 1 to a position near the middle of the gas cylinder 1. One end passes through the tail plug 3 and connects to the gas cylinder 1. The other end of the first conduit 5 is connected to an existing hydrogen discharge pipe for discharging hydrogen to the outside of the vehicle. A third TPRD 6 is installed on the conduit and near the middle of the gas cylinder 1, facing the vehicle engine 11, to prevent the gas cylinder 1 from exploding due to a local fire in the vehicle engine 11. A bracket 4 is installed around and fixedly on the surface of the gas cylinder 1, near the middle of the gas cylinder 1, and is used to support the first conduit 5. The distance between the first conduit 5 and the gas cylinder 1 does not exceed 6 mm. The first conduit 5 includes a first sub-pipe 7 and a second sub-pipe 8 connected in sequence. The first sub-pipe 7 passes through the tail plug 3 and connects to the gas cylinder 1, extending to a position near the middle of the side of the gas cylinder 1; one end of the third TPRD 6 is connected to the first sub-pipe 7, and the other end is connected to the second sub-pipe 8. The second sub-pipe 8 is U-shaped and extends in a circuitous manner to a side near the end face of the tail plug 3, connecting to a hydrogen exhaust pipe, which is used to exhaust hydrogen gas to the outside of the vehicle.

[0046] like Figure 5 As shown, valve 2 has a second vent hole, which is connected to the second TPRD12. When the second TPRD12 is activated, hydrogen gas in gas cylinder 1 is discharged from the second vent hole.

[0047] like Figure 6As shown, the first TPRD9 has a first through hole 13, which connects to the gas cylinder 1. One end of the second conduit is connected to the first through hole 13, and the other end is connected to an existing hydrogen exhaust pipe for venting hydrogen to the outside of the vehicle. The first TPRD9 also has a first vent hole 10, which is opposite to and connected to the first through hole 13. The distance between the first conduit 5 and the second conduit is not less than 20 mm.

[0048] In this embodiment, the working pressure of gas cylinder 1 is 20-70 MPa.

[0049] like Figure 7 As shown, Figure 7 The illustration shows the arrangement of three gas cylinders 1 in a car. The three gas cylinders 1 are stacked, and the placement of the third TPRD6 on each gas cylinder 1 is different. Specifically, the angle between the third TPRD6 and the cross-section of the gas cylinder 1 is α, where α ≤ 45°. Each third TPRD6 faces the car engine 11 to ensure that the third TPRD6 can be activated in time if the car engine 11 catches fire and affects the gas cylinder 1.

[0050] In the description of this utility model, it should be noted that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing this utility model 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 utility model.

[0051] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0052] It should be understood that the term "and / or" used in this document is merely a description of the same field in the related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0053] Although the subject matter has been described using language specific to structural features and / or methodological logic, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. Rather, the specific features and actions described above are merely illustrative examples of implementing the claims.

[0054] The above descriptions are merely embodiments of this utility model. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are knowledgeable of all existing technologies in that field, and possess the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in conjunction with their own capabilities. Typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A hydrogen storage cylinder with an external TPRD, characterized in that, The utility model relates to a hydrogen tank for hydrogen vehicle, comprising: a gas cylinder with a volume of no less than 400L, one end of which is provided with a valve, and the other end of which is detachably connected with a tail plug; a first TPRD arranged on the tail plug and connected with the gas cylinder, for preventing the gas cylinder from exploding due to local fire near the tail plug; a second TPRD arranged on the valve and connected with the gas cylinder, for preventing the gas cylinder from exploding due to local fire near the valve; a first conduit extending along the side of the gas cylinder to a position near the middle of the gas cylinder, one end of which penetrates through the tail plug to communicate with the gas cylinder, and the other end of which is used for discharging hydrogen gas outside the vehicle; a third TPRD installed on the conduit and near the middle of the gas cylinder, and facing the engine of the vehicle, for preventing the middle of the gas cylinder from exploding due to local fire of the engine of the vehicle.

2. The hydrogen storage cylinder with external TPRD according to claim 1, characterized in that, a bracket is further included, which is installed around and fixed on the surface of the gas cylinder, near the middle of the gas cylinder, and used for supporting the first conduit.

3. The hydrogen storage cylinder with external TPRD according to claim 1, characterized in that, The first conduit comprises a first sub-conduit and a second sub-conduit which are communicated in sequence; the first sub-conduit penetrates through the tail plug to communicate with the gas cylinder, and extends to a position near the middle of the side of the gas cylinder; one end of the third TPRD is connected with the first sub-conduit, and the other end of the third TPRD is connected with the second sub-conduit; the second sub-conduit is in the shape of a U-shaped tube, and the second sub-conduit extends to a side near the end face of the tail plug in a detour manner, and is connected with a hydrogen discharge pipeline which is used for discharging hydrogen gas outside the vehicle.

4. The hydrogen storage cylinder with external TPRD according to any one of claims 1-3, characterized in that, The distance between the first conduit and the gas cylinder is no more than 6mm.

5. The hydrogen storage cylinder with external TPRD according to claim 1, characterized in that, The working pressure of the gas cylinder is 20-70Mpa.

6. The hydrogen storage cylinder with an external TPRD according to claim 1, characterized in that, The included angle between the third TPRD and the cross section is no more than 45°.

7. The hydrogen storage cylinder with an external TPRD according to claim 1, characterized in that, A second conduit is further included, a first through hole is formed on the first TPRD, and the first through hole communicates with the gas cylinder; one end of the second conduit communicates with the first through hole, and the other end of the second conduit is used for discharging hydrogen gas outside the vehicle.

8. The hydrogen storage cylinder with external TPRD according to claim 7, characterized in that, A first exhaust hole is further formed on the first TPRD, the first exhaust hole is opposite to the first through hole and communicates with the first through hole.

9. The hydrogen storage cylinder with an external TPRD according to claim 7, characterized in that, The distance between the first conduit and the second conduit is no less than 20mm.

10. The hydrogen storage cylinder with an external TPRD according to claim 1, characterized in that, A second exhaust hole is formed on the valve, the second exhaust hole is connected with the second TPRD, and when the second TPRD is activated, the hydrogen gas in the gas cylinder is discharged from the second exhaust hole.

Images