Vehicle-mounted hydrogen system for truck

Abstract

The utility model discloses a vehicle-mounted hydrogen system for a cargo truck, which comprises a storage component, a plurality of hydrogen cylinders, bottle opening valves and bottle tail valves, the bottle opening valves and the bottle tail valves are arranged at the front ends and the rear ends of the hydrogen cylinders, the hydrogen cylinders are connected through high-pressure steel pipes, and high-pressure steel pipe joints are located outside a truck frame; hydrogen cylinders which are bilaterally symmetrical relative to the central line of the frame are connected in series; each group of serially-connected hydrogen cylinders are connected in parallel; the supply assembly comprises a pressure reducer, a needle valve, a high-pressure steel pipe and a low-pressure hose; the needle valve and a driver are arranged on the same side, and a high-pressure steel pipe is communicated with a hydrogen cylinder and a low-pressure hose directly connected with a fuel cell engine. According to the utility model, a plurality of hydrogen cylinder chassis are reasonably arranged and are connected in series and in parallel, so that the space of a container is prevented from being occupied, and the driving safety is improved; and compared with a traditional side arrangement scheme, the cruising ability is greatly improved through the multiple hydrogen cylinder sets, hydrogen leakage caused by collision of pipelines is avoided, and safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy vehicles, and specifically, to a vehicle-mounted hydrogen system for a truck. Background Art

[0002] In order to meet the needs of environmental protection and sustainable development, and at the same time reduce dependence on petroleum products, the country has vigorously promoted the development and utilization of new energy. Hydrogen energy, as a new energy, has the advantages of abundant reserves, light weight and good combustion performance. Hydrogen energy vehicles are more environmentally friendly and have high energy utilization rates than traditional fuel vehicles. Compared with electric vehicles, they have faster refueling and longer endurance, and have broad development prospects.

[0003] Onboard hydrogen systems are a crucial component of hydrogen-powered vehicles. Currently, domestic commercial vehicles generally utilize either a rear-mounted multi-cylinder system or a side-mounted single or dual-cylinder system. These systems occupy cargo box space and, in the event of a collision, prevent the cab from moving backward, causing deformation and trapping the driver, posing a significant safety hazard. Side-mounted single or dual-cylinder systems have smaller cylinder capacities, limited gas storage capacity, and shorter driving range. Therefore, a vehicle-mounted hydrogen system that maintains cargo box space and offers enhanced driving range is needed. Utility Model Content

[0004] In order to solve the above technical problems, the purpose of the present utility model is to provide a vehicle-mounted hydrogen system for a truck, which has the advantages of not occupying cargo box space, good safety and long endurance.

[0005] The utility model solves the above problems through the following technical solutions:

[0006] A hydrogen system for a truck includes: a storage component, which is composed of several groups of hydrogen cylinders, and bottle mouth valves and bottle tail valves arranged at the front and rear ends of the hydrogen cylinders, and the hydrogen cylinders are connected by high-pressure steel pipes, and the high-pressure steel pipe joints are located outside the frame; the hydrogen cylinders are connected in series with respect to the left and right symmetry of the center line of the frame, and the groups of series hydrogen cylinders are connected in parallel; a filling component, which includes a hydrogen filling port, a first filter and a one-way valve arranged in sequence to fill the hydrogen cylinders; a supply component, which includes a pressure reducer, a needle valve, a high-pressure steel pipe and a low-pressure hose; the pressure reducer and the needle valve are arranged on the high-pressure steel pipe, and the needle valve is arranged on the same side as the driver, and the hydrogen cylinders and the low-pressure hose directly connected to the fuel cell engine are connected by the high-pressure steel pipe; a discharge component is a discharge part pipeline connected to the bottle mouth valve, the bottle tail valve and the pressure reducer, and the discharge part pipelines are connected to each other.

[0007] As a further improvement of the present invention, the storage assembly includes no less than five hydrogen cylinders located at the center left, center right, rear left, rear center and rear right of the chassis, and the hydrogen cylinders located at the center left and center right, and rear left and rear right are respectively connected in series and in parallel with the hydrogen cylinder at the rear center.

[0008] As a further improvement of the present invention, the bottle mouth valve has four pipelines connected to the hydrogen bottle, namely the gas filling / supply part pipeline, the gas outlet part pipeline, the discharge part pipeline and the temperature detection part pipeline.

[0009] As a further improvement of the present invention, the gas filling / supply part pipeline: hydrogen flows into the hydrogen cylinder through the air inlet, electromagnetic switch valve, manual valve, overflow valve, and filter in sequence; and / or the gas outlet part pipeline: hydrogen in the hydrogen cylinder flows out through the discharge valve and the air outlet; and / or the discharge part pipeline: hydrogen flows out through the temperature-driven safety pressure relief device and the TPRD discharge port; and / or the temperature detection part of the temperature detection part pipeline, that is, the temperature sensor; and the air inlet and the air outlet are directly connected by a pipeline, and the pipeline is provided with a high-pressure pressure sensor for monitoring the pressure in the hydrogen cylinder.

[0010] As a further improvement of the present invention, the supply assembly further includes a high-pressure pressure sensor, a medium-pressure pressure sensor, a hydrogen concentration sensor and a hydrogen controller for monitoring the hydrogen state in the system.

[0011] As a further improvement of the present invention, the high-pressure pressure sensor is provided on the bottle valve to monitor the pressure in the hydrogen bottle and determine the hydrogen reserve according to the pressure;

[0012] and / or the medium pressure sensor is provided on the pressure reducer to monitor the pressure at the pressure reducer outlet;

[0013] And / or the hydrogen concentration sensor is arranged on the upper part of the hydrogen bottle valve and the upper part of the fuel cell engine air inlet;

[0014] And / or the hydrogen controller is electrically connected to the high-pressure pressure sensor, the medium-pressure pressure sensor, the hydrogen concentration sensor, the bottle mouth valve and the bottle tail valve to achieve control.

[0015] As a further improvement of the present invention, the system also includes a fixing component for installing the system; the fixing component has a connected hydrogen bottle mounting frame and a connecting bracket, and the hydrogen bottle mounting frame with a storage component is arranged on the vehicle frame through the connecting bracket and is lower than the cargo box pads.

[0016] As a further improvement of the present invention, the hydrogen bottle mounting frame includes a left-side hydrogen bottle mounting frame and a right-side hydrogen bottle mounting frame that are symmetrical on both sides, as well as a center hydrogen bottle mounting frame; the main bracket of the hydrogen bottle mounting frame is pre-embedded with a number of welding nuts to connect the connecting bracket through the main bracket.

[0017] As a further improvement of the present invention, the connecting bracket is an L-shaped structure, and screw holes matching with bolts are formed on both sides of the connecting bracket, one side is fixed to the inner side of the frame by bolts, and the other side corresponds to several welding nuts of the main bracket of the hydrogen bottle mounting frame.

[0018] As a further improvement of the present invention, the main bracket of the central hydrogen bottle installation frame is connected to the connecting bracket and fixed by screws.

[0019] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0020] (1) The utility model improves driving safety while avoiding occupying cargo box space through the reasonable layout of the chassis layout of multiple hydrogen cylinders and the combination of parallel and series connection; and greatly improves the endurance of the vehicle compared with the traditional side-mounted solution by using multiple hydrogen cylinder groups. In addition, while meeting the endurance requirements of users, cylinders with smaller diameters can be selected to ensure ground clearance.

[0021] (2) The utility model uses multi-point leakage monitoring, that is, hydrogen concentration sensors are respectively arranged on the upper part of the mouth of the five hydrogen cylinders and the upper part of the fuel cell engine air inlet. These six locations have many pipeline interfaces and are prone to hydrogen leakage. The use of a six-way alarm can quickly locate the hydrogen leakage location. By internally installing the hydrogen pipeline, all hydrogen pipelines are fixed to the hydrogen cylinder frame and the inner side of the vehicle frame, and are not exposed to the outside, thereby preventing hydrogen leakage caused by collisions and improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the layout of a hydrogen system for a truck in accordance with the present invention;

[0023] Figure 2 This is a control block diagram of a hydrogen system for trucks in accordance with the present invention;

[0024] Figure 3 This is a schematic diagram of the parts arrangement of the hydrogen cylinder at position I without the front end skin of the frame in the embodiment of the present utility model;

[0025] Figure 4 This is a schematic diagram of the parts arrangement of the hydrogen cylinder II without the front end skin of the frame in the embodiment of the present utility model;

[0026] Figure 5 This is a schematic diagram of the parts arrangement of the hydrogen cylinder at position III without the front end skin of the frame in the embodiment of the present utility model;

[0027] Figure 6 This is a schematic diagram of the parts arrangement of the hydrogen cylinder at position IV in the embodiment of the present utility model without the front end skin of the frame;

[0028] Figure 7This is a schematic diagram of the parts arrangement of the hydrogen cylinder V without the front end skin of the frame in the embodiment of the present utility model;

[0029] Figure 8 This is a schematic diagram of the mounting frame structure of the left side hydrogen bottle according to an embodiment of the present utility model;

[0030] Figure 9 This is a schematic diagram of the hydrogen bottle installation frame structure in an embodiment of the present utility model.

[0031] Reference numerals:

[0032] 1. Hydrogen cylinder I; 2. Hydrogen cylinder II; 3. Hydrogen cylinder III; 4. Hydrogen cylinder IV; 5. Hydrogen cylinder V; 6. Bottle mouth valve; 7. Bottle tail valve; 8. Hydrogen filling port; 9. First filter; 10. One-way valve; 11. High-pressure pressure sensor; 12. Pressure reducer; 13. Medium-pressure pressure sensor; 14. Needle valve; 15. Gas filling / supply pipeline; 16. Low-pressure hose; 17. Discharge pipeline; 18. Hydrogen concentration sensor; 19. Hydrogen controller; 20. Left-side hydrogen cylinder mounting frame; 21. Right-side hydrogen cylinder mounting frame; 22. Center hydrogen cylinder mounting frame; 23. Connecting bracket; 24. Fuel cell engine; 25. Vehicle frame. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below in conjunction with the drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals throughout represent the same or similar parts or parts with the same or similar functions. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present application, and should not be understood as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0034] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0035] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to a fixed connection, an indirect connection via an intermediate medium, internal communication between two components, or an interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0036] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are orientations or positional relationships based on the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying 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 this application.

[0037] In addition, the terms "comprises" and "having" and any variations thereof are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or display that comprises a series of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, product, or display.

[0038] The following will be combined Figure 1-9 , a vehicle-mounted hydrogen system for a truck involved in the embodiments of the present application is described in detail. It is worth noting that the following embodiments are only used to explain the present application and do not constitute a limitation of the present application.

[0039] Example:

[0040] Combined with attachment Figure 1-9 As shown, a vehicle-mounted hydrogen system for a truck includes a storage component, a filling component, a supply component, and a discharge component;

[0041] The storage assembly consists of several groups of hydrogen cylinders, and bottle mouth valves and bottle tail valves provided at the front and rear ends of the hydrogen cylinders. The hydrogen cylinders are connected by high-pressure steel pipes, and the high-pressure steel pipe joints are located outside the vehicle frame. The hydrogen cylinders are connected in series symmetrically with respect to the centerline of the vehicle frame, and the hydrogen cylinders in each group are connected in parallel.

[0042] In this embodiment, the hydrogen cylinders have a hydrogen storage pressure of 35 MPa, a volume of 210 L, and can store 25.2 kg of hydrogen. They include hydrogen cylinders I1, II2, III3, IV4, and V5, which are arranged on the center left, center right, rear left, rear center, and rear right of the chassis, respectively. Cylinders I1, III3, and IV4 are connected in parallel, I1 and II2 are connected in series, and IV4 and V5 are connected in series. This connection ensures not only the hydrogen supply but also the balance of the vehicle. The cylinders are connected by high-pressure steel pipes, which prevents excessively long pipes between the cylinders and leaves the pipe joints outside the frame for easy maintenance. Of course, the number of hydrogen cylinders can also be increased; five is a preferred option for adaptability.

[0043] The bottle-mouth valve 6 monitors the temperature and pressure inside the hydrogen cylinder and controls the filling, supply, and release of hydrogen. Four lines connect to the hydrogen cylinder: a filling / supply line 15, a gas outlet line, a release line 17, and a temperature detection line.

[0044] Among them, the gas filling / supply part pipeline 15: hydrogen flows into the hydrogen cylinder through the gas inlet, electromagnetic switch valve, manual valve, overflow valve, and filter in sequence;

[0045] Gas outlet pipeline: The hydrogen in the hydrogen cylinder flows out through the discharge valve and the gas outlet;

[0046] Discharge section pipeline 17: hydrogen flows out through the temperature-driven safety pressure relief device (TPRD) and the TPRD discharge port;

[0047] The temperature detection part of the temperature detection part of the pipeline is the temperature sensor;

[0048] In addition, the air inlet and the air outlet are directly connected by a pipe, and a high-pressure pressure sensor 11 is installed on the pipe to monitor the pressure in the hydrogen cylinder.

[0049] The bottle tail valve 7 adopts a temperature-driven safety pressure relief device (TPRD) to prevent the hydrogen in the hydrogen storage bottle from overheating and overpressure, causing deflagration and explosion accidents.

[0050] The filling assembly includes a hydrogenation port 8, a first filter 9, a one-way valve 10, etc., which are sequentially arranged on the gas filling / supply part pipeline 15; the hydrogenation port 8 is fixed on the frame assembly and is sequentially connected to the first filter 9 and the one-way valve 10 through the gas filling / supply part pipeline 15.

[0051] The supply assembly includes a high-pressure pressure sensor 11, a pressure reducer 12, a medium-pressure pressure sensor 13, a needle valve 14, a high-pressure steel pipe, a low-pressure hose 16, a hydrogen concentration sensor 18, and a hydrogen controller 19. During gas supply, hydrogen flows through the bottle-mouth valve 6 at hydrogen cylinder II 2, flows through the high-pressure steel pipe to the pressure reducer 12, and after being reduced in pressure by the pressure reducer 12, flows through the high-pressure steel pipe through the needle valve 14 to the air inlet of the fuel cell engine 24. A low-pressure hose 16 is connected before the air inlet of the fuel cell engine 24 to prevent seal damage and hydrogen leakage caused by inconsistent vibration between the high-pressure steel pipe and the fuel cell engine. The high-pressure pressure sensor 11, medium-pressure pressure sensor 13, hydrogen concentration sensor 18, and hydrogen controller 19 monitor the hydrogen status within the system to ensure normal operation.

[0052] In this embodiment, specifically, a high-pressure pressure sensor 11 is installed on the bottle valve 6 to monitor the pressure in the hydrogen bottle and determine the hydrogen reserve based on the pressure;

[0053] The outlet pressure of the pressure reducer 12 is set according to the intake pressure requirement of the fuel cell engine 24; the medium pressure sensor 13 is installed on the pressure reducer 12 to monitor the outlet pressure of the pressure reducer 12;

[0054] The needle valve 14 is used to control the hydrogen supply and is arranged between the pressure reducer 12 and the low-pressure hose 16, on the same side as the driver for easy operation;

[0055] The hydrogen concentration sensor 18 is respectively arranged on the upper part of the hydrogen cylinder valve 6 and the upper part of the fuel cell engine 24 air inlet to monitor the ambient hydrogen concentration. In this embodiment, a hydrogen concentration sensor is provided for each hydrogen cylinder to detect leakage points more quickly and improve safety.

[0056] The hydrogen controller 19 is connected to the wiring harness of the high-pressure pressure sensor 11, the wiring harness of the medium-pressure pressure sensor 13, the wiring harness of the hydrogen concentration sensor 18, the wiring harness of the bottle mouth valve 6, and the wiring harness of the bottle tail valve 7. It receives signals from various components and has alarm functions such as overpressure, underpressure, concentration, and temperature. When the hydrogen concentration exceeds the set threshold, it can control the closure of all bottle valves.

[0057] Discharge component: The discharge part pipeline 17 is connected to the bottle mouth valve 6, the bottle tail valve 7, and the pressure reducer 12. The discharge part pipelines are connected to each other. When the temperature inside the bottle or the environment reaches 110±5℃, the temperature-driven safety pressure relief device (TPRD) in the bottle mouth valve 6 and the bottle tail valve 7 is activated; the pressure reducer 12 is connected to the discharge part pipeline 17 so that when the pressure of the pressure reducer reaches 1.7MPa, the safety valve opens, and the hydrogen is discharged into the atmosphere through the discharge part pipeline 17.

[0058] In another optional embodiment, a vehicle-mounted hydrogen system for a truck further includes a fixing assembly for installing the vehicle-mounted hydrogen system for a truck; the fixing assembly includes a hydrogen bottle mounting frame and a connecting bracket 23, and the hydrogen pipelines are all fixed to the hydrogen bottle mounting frame and the inner side of the frame and are not exposed to the outside, thereby avoiding hydrogen leakage due to collision of the pipelines and improving safety.

[0059] Hydrogen bottle mounting frame, the hydrogen bottle mounting frame includes three types: a left hydrogen bottle mounting frame 20, a right hydrogen bottle mounting frame 21, and a center hydrogen bottle mounting frame 22, wherein the left hydrogen bottle mounting frame 20 and the right hydrogen bottle mounting frame 21 are left-right symmetrical parts;

[0060] The main brackets of the left and right hydrogen bottle mounting frames 20 and 21 are L-shaped. Nuts are pre-welded on the main brackets for easy assembly. The side hydrogen bottle mounting frames are bolted to the vehicle frame 25. The side hydrogen bottle mounting frames are covered with a sheath on the outer side, front, rear, and bottom surfaces. Because the top surface is close to the cargo box, no protection is required.

[0061] The central hydrogen cylinder mounting frame 22 has a main support in an "X" shape, and an L-shaped connecting bracket 23. During assembly, the four connecting brackets 23 are first bolted to the left and right inner sides of the vehicle frame 25. The main support of the central hydrogen cylinder mounting frame 22 is then placed on the connecting brackets 23 and bolted in place. This structure improves safety compared to fixing the mounting frame to the crossbeam, preventing the cylinder from falling due to bolts falling out. The central hydrogen cylinder mounting frame is covered with a leather cover on the bottom. Since the sides are inside the vehicle frame 25 and the top is close to the cargo box, no protection is required.

[0062] The fixing assembly includes a hydrogen bottle mounting frame and a connecting bracket. This embodiment places two hydrogen bottles on each side of the frame and one in the middle. The overall height is lower than the cargo box skids, ensuring high endurance while not taking up cargo box space.

[0063] The utility model provides a vehicle-mounted hydrogen system for trucks. By rationally arranging multiple hydrogen cylinders on the chassis and combining them in parallel and series, it improves driving safety while avoiding occupying cargo box space. The multiple hydrogen cylinder groups greatly improve the driving range compared to the traditional side-mounted solution. In addition, while meeting the user's driving range needs, smaller diameter cylinders can be used to ensure ground clearance. At the same time, through multi-point leakage monitoring, that is, hydrogen concentration sensors are respectively arranged on the upper part of the bottle mouths of the five hydrogen cylinders and the upper part of the fuel cell engine air inlet. These six parts have many pipeline interfaces and are prone to hydrogen leakage. The six-way alarm can quickly locate the hydrogen leakage site. By building in the hydrogen pipeline, all hydrogen pipelines are fixed to the cylinder frame and the inside of the frame, and are not exposed to the outside, so as to avoid hydrogen leakage caused by collision and improve safety.

[0064] Although the present invention is described herein with reference to the illustrative embodiments of the present invention, the above embodiments are merely preferred embodiments of the present invention, and the embodiments of the present invention are not limited to the above embodiments. It should be understood that those skilled in the art can design many other modifications and implementations, which will fall within the scope and spirit of the principles disclosed in this application.

Claims

1. A vehicle-mounted hydrogen system for a truck, characterized in that: include: The storage assembly consists of a number of hydrogen cylinders, and bottle mouth valves and bottle tail valves provided at the front and rear ends of the hydrogen cylinders. The hydrogen cylinders are connected by high-pressure steel pipes, and the high-pressure steel pipe joints are located outside the vehicle frame. The hydrogen cylinders are connected in series symmetrically with respect to the centerline of the vehicle frame, and each group of series hydrogen cylinders is connected in parallel. A filling assembly, comprising a hydrogen filling port, a first filter and a one-way valve arranged in sequence, for filling the hydrogen cylinder; Supply assembly, including a pressure reducer, a needle valve, a high-pressure steel pipe, and a low-pressure hose; the pressure reducer and needle valve are installed on the high-pressure steel pipe, and the needle valve is installed on the same side as the driver. The high-pressure steel pipe connects the hydrogen cylinder and the low-pressure hose directly connected to the fuel cell engine; The discharge assembly is a discharge pipe connected to the bottle mouth valve, bottle tail valve and pressure reducer, and the discharge pipes are connected to each other.

2. The onboard hydrogen system for a truck according to claim 1, characterized in that: The storage assembly includes no less than five hydrogen cylinders located at the center left, center right, rear left, rear center and rear right of the chassis, and the hydrogen cylinders located at the center left and center right, and rear left and rear right are respectively connected in series and in parallel with the hydrogen cylinder at the rear center.

3. The onboard hydrogen system for a truck according to claim 1, characterized in that: The bottle mouth valve has four pipelines connected to the hydrogen bottle, namely the gas filling / supply part pipeline, the gas outlet part pipeline, the discharge part pipeline and the temperature detection part pipeline.

4. The onboard hydrogen system for a truck according to claim 3, characterized in that: The gas filling / supply pipeline: hydrogen flows into the hydrogen cylinder through the gas inlet, electromagnetic switch valve, manual valve, overflow valve and filter in sequence; And / or the gas outlet pipeline: the hydrogen in the hydrogen cylinder flows out through the discharge valve and the gas outlet; and / or the discharge portion of the pipeline: hydrogen flows out through the temperature-driven safety pressure relief device and the TPRD discharge port; and / or the temperature detection portion of the temperature detection portion pipeline, i.e., the temperature sensor; The air inlet and the air outlet are directly connected by a pipeline, and a high-pressure pressure sensor for monitoring the pressure in the hydrogen cylinder is provided on the pipeline.

5. The onboard hydrogen system for a truck according to claim 1, characterized in that: The supply assembly further includes a high-pressure pressure sensor, a medium-pressure pressure sensor, a hydrogen concentration sensor and a hydrogen controller for monitoring the hydrogen state in the system.

6. The onboard hydrogen system for a truck according to claim 5, characterized in that: The high-pressure pressure sensor is provided on the bottle valve to monitor the pressure in the hydrogen bottle and determine the hydrogen reserve according to the pressure; and / or the medium pressure sensor is provided on the pressure reducer to monitor the pressure at the pressure reducer outlet; And / or the hydrogen concentration sensor is arranged on the upper part of the hydrogen bottle valve and the upper part of the fuel cell engine air inlet; And / or the hydrogen controller is electrically connected to the high-pressure pressure sensor, the medium-pressure pressure sensor, the hydrogen concentration sensor, the bottle mouth valve and the bottle tail valve to achieve control.

7. The onboard hydrogen system for a truck according to claim 1, characterized in that: The system also includes a fixing assembly for installing the system; The fixing assembly comprises a hydrogen bottle mounting frame and a connecting bracket which are connected to each other. The hydrogen bottle mounting frame with the storage assembly therein is arranged on the vehicle frame through the connecting bracket and is lower than the cargo box pads.

8. The onboard hydrogen system for a truck according to claim 7, characterized in that: The hydrogen bottle installation frame includes a left-side hydrogen bottle installation frame and a right-side hydrogen bottle installation frame that are bilaterally symmetrical, and a center hydrogen bottle installation frame; The main bracket of the hydrogen bottle mounting frame is pre-embedded with a plurality of welding nuts to connect the connecting bracket through the main bracket.

9. The onboard hydrogen system for a truck according to claim 8, characterized in that: The connecting bracket is an L-shaped structure, and screw holes that match bolts are formed on both sides of the connecting bracket. One side is fixed to the inner side of the frame by bolts, and the other side corresponds to several welding nuts of the main bracket of the hydrogen bottle mounting frame.

10. The onboard hydrogen system for a truck according to claim 9, characterized in that: The main bracket of the central hydrogen bottle installation frame is connected to the connecting bracket and fixed by screws.

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