Back hydrogen storage frame structure and hydrogen fuel truck

Abstract

The application discloses a back hydrogen storage frame structure and a hydrogen fuel truck, and relates to the technical field of vehicle structure design. The back hydrogen storage frame structure comprises a hydrogen frame and a plurality of hydrogen cylinders, the hydrogen frame adopts a frame structure, and the hydrogen cylinders are arranged in the frame structure; the bottom end of the hydrogen frame is fixed to a vehicle frame, and a hollow cavity is formed between the bottom of the hydrogen frame and the vehicle frame; a high-pressure inner frame platform is covered in the hollow cavity, and the top surface and the side surface of the high-pressure inner frame platform are both provided with a certain gap from the hydrogen frame; the high-pressure inner frame platform is used for mounting a plurality of high-pressure accessories, and the bottom end of the high-pressure inner frame platform is also fixed to the vehicle frame. The back hydrogen storage frame structure and the hydrogen fuel truck adopt a brand-new frame structure, and the problems of high production process requirement, poor assembly process of the upper and lower split hydrogen frame and narrow assembly space or poor space utilization of the integral hydrogen frame are solved.

Description

Technical Field

[0001] This application relates to the field of vehicle structural design technology, specifically to a rear-mounted hydrogen storage frame structure and a hydrogen fuel cell truck. Background Technology

[0002] Currently, the hydrogen storage frame structure on the back of fuel cell trucks is generally fixed above the vehicle frame and located behind the cab. The fuel cell engine of a fuel cell truck is generally located below the cab.

[0003] In related technologies, the rear-mounted hydrogen storage frame structure includes a hydrogen frame, which generally has two structural forms: the first is a split upper and lower structure design, and the second is an integral structure design. In the split upper and lower hydrogen frame, the lower frame is used to house high-pressure accessories, and the upper frame is used to house the hydrogen cylinder. The integral hydrogen frame is further divided into two forms: one form has a reserved space at the bottom of the hydrogen frame for installing high-pressure accessories, while the upper layers are used to house the hydrogen cylinder; the other form is an integral hydrogen frame that only houses the hydrogen cylinder, without providing space for high-pressure accessories, which are installed in other locations on the vehicle body.

[0004] However, the split-type hydrogen frame has the following disadvantages: high production process requirements. Due to the large number of joints between the upper and lower frames, the consistency of production is crucial. Otherwise, on-site grinding will be necessary, which will increase the cost of hydrogen frame production. Poor assembly processability. The arrangement of the lower frame and the frame requires high precision in fitting. If the mounting holes of the upper and lower frames cannot be aligned, the amount of on-site grinding will be particularly large, affecting assembly efficiency and increasing the labor intensity of workers. In addition, the arrangement of the lower frame and the frame results in some exposed structures on the connecting surface, which affects the aesthetics and poses a safety hazard.

[0005] The integrated hydrogen frame, which includes space for high-voltage accessory installation, suffers from limited assembly space. The frame typically arrives as a complete unit with both front and rear skins already installed; installing high-voltage accessories requires disassembling these skins. The operating area is completely enclosed by the frame, resulting in cramped space, inconvenient installation, and low efficiency. High-voltage accessory installation is entirely dependent on the frame, which is only assembled onto the vehicle in the final production stage, hindering process planning and preventing flattened installation. In contrast, an integrated hydrogen frame without dedicated space for high-voltage accessories requires additional space in other parts of the vehicle body for mounting brackets, leading to poor space utilization. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the purpose of this application is to provide a rear-mounted hydrogen storage frame structure and a hydrogen fuel cell truck. The frame design is novel and solves the problems of high production process requirements and poor assembly process for split hydrogen frames, as well as the small assembly space or poor space utilization of integral hydrogen frames.

[0007] To achieve the above objectives, the technical solution adopted is: a rear hydrogen storage frame structure, comprising: a hydrogen storage outer frame device, which includes a hydrogen frame and several hydrogen cylinders, wherein the hydrogen frame adopts a frame structure and the hydrogen cylinders are placed in the frame structure; the bottom end of the hydrogen frame is fixed to the vehicle frame, and a hollow cavity is formed between the bottom of the hydrogen frame and the vehicle frame.

[0008] The high-pressure inner frame platform is enclosed in a hollow cavity, and there is a certain gap between the top and sides of the high-pressure inner frame platform and the hydrogen frame; the high-pressure inner frame platform is used to install multiple high-pressure accessories, and the bottom of the high-pressure inner frame platform is also fixed to the vehicle frame.

[0009] Based on the above technical solution, the high-voltage inner frame platform includes an inner frame body, and the multiple high-voltage accessories include a high-voltage power distribution box, a vehicle auxiliary DC transformer, and a five-in-one controller; the high-voltage power distribution box, the vehicle auxiliary DC transformer, and the five-in-one controller are all installed on the inner frame body, and the vehicle auxiliary DC transformer is located between the high-voltage power distribution box and the five-in-one controller; a battery is installed on the inner frame body near the vehicle auxiliary DC transformer.

[0010] Based on the above technical solution, the bottom of the hydrogen frame is provided with a downwardly extending mounting seat, which is fixed to the side wall of the vehicle frame; the inner frame body includes an inner frame base and an inner frame mounting seat, the inner frame mounting seat is fixed to the vehicle frame, and the inner frame base is in close contact with the top surface of the vehicle frame.

[0011] Based on the above technical solution, the hydrogen storage outer frame device also includes inspection doors and a skin; the two inspection doors are respectively installed on the left and right sides of the inner frame body, and the skin is installed on the front and rear sides of the inner frame body.

[0012] This application also discloses a hydrogen fuel cell truck, comprising:

[0013] The driver's cab is fixed above the head of the chassis;

[0014] The fuel cell engine is located between the first and second main beams of the vehicle frame and is arranged below the cab floor. The fuel cell engine is also arranged on top of the front axle. The fuel cell engine is equipped with a corresponding fuel cell cooling system, which is used to dissipate heat from the fuel cell engine and is located on the front side of the front axle.

[0015] The aforementioned rear hydrogen storage frame structure is fixed to the top of the vehicle frame and arranged behind the cab.

[0016] Based on the above technical solution, the hydrogen fuel cell truck also includes an electric motor and an electric motor cooling system. The electric motor is located adjacent to the lower part of the high-pressure inner frame platform, and the electric motor cooling system is used to dissipate heat from the electric motor and is located on the right end face of the high-pressure inner frame platform.

[0017] Based on the above technical solution, the high-voltage inner frame platform includes an inner frame body, and the multiple high-voltage accessories include a high-voltage power distribution box, a vehicle auxiliary DC transformer, and a five-in-one controller; the high-voltage power distribution box, the vehicle auxiliary DC transformer, and the five-in-one controller are all installed on the inner frame body, and the vehicle auxiliary DC transformer is located between the high-voltage power distribution box and the five-in-one controller; a battery is installed on the inner frame body near the vehicle auxiliary DC transformer.

[0018] Based on the above technical solution, the hydrogen fuel cell truck is equipped with a power battery module, which is divided into two equal parts and arranged on the left side of the first beam and the right side of the second beam, respectively; the power battery module is located between the front axle and the middle axle, and the power battery module is staggered from the hydrogen frame.

[0019] Based on the above technical solution, the hydrogen fuel cell truck also includes a power battery cooling system, which is used to dissipate heat from the power battery module; the power battery cooling system includes a compressor and a condenser, which are respectively located on the left side of the first beam and the right side of the second beam in the left-right direction.

[0020] Based on the above technical solution, the bottom of the hydrogen frame is provided with a downwardly extending mounting seat, which is fixed to the side wall of the vehicle frame; the inner frame body includes an inner frame base and an inner frame mounting seat, the inner frame mounting seat is fixed to the vehicle frame, and the inner frame base is close to the top surface of the vehicle frame; the hydrogen storage outer frame device also includes an inspection door and a skin; the two inspection doors are respectively installed on the left and right sides of the inner frame body, and the skin is installed on the front and rear sides of the inner frame body.

[0021] The beneficial effects of the technical solution provided in this application include:

[0022] 1. The rear hydrogen storage frame structure of this application comprises two parts: a hydrogen storage outer frame device and a high-pressure inner frame platform. These two parts are independent of each other, resulting in high assembly efficiency. During actual assembly, the high-pressure inner frame platform is used to house multiple high-pressure accessories. Simultaneously, several hydrogen cylinders are installed into the hydrogen frame to form the hydrogen storage outer frame device. The two parts are assembled independently and simultaneously. First, the high-pressure inner frame platform is installed and fixed to the vehicle frame, and then the hydrogen storage outer frame device is fixed to the vehicle frame. The high-pressure inner frame platform is enclosed within a hollow cavity. This application employs a frame design for hydrogen storage. The outer frame device encloses the high-pressure inner frame platform, and the assembly does not interfere with each other. The ingenious design significantly improves the final assembly process performance and increases production efficiency. The frame design avoids interference between the high-pressure accessory part (the high-pressure inner frame platform of this application) and the hydrogen storage part (the hydrogen storage outer frame device of this application), reduces the dependence of the high-pressure accessory on the hydrogen frame, meets the needs of flat assembly of the whole vehicle, and the pipeline bundles related to the high-pressure inner frame platform can be installed in advance (the pipelines can be molded pipes) and accommodated in the gap between the hollow cavity and the hydrogen storage outer frame device, improving the installation processability and assembly efficiency.

[0023] Compared to the existing technology of an integral hydrogen frame with a high-voltage accessory installation space, this method eliminates the need to drill inside the hydrogen frame to install each high-voltage accessory individually. Instead, it directly installs to form a high-voltage inner frame platform, allowing assembly to take place outside the hydrogen frame. This provides ample assembly space and eliminates the need to disassemble and reassemble the hydrogen frame's skin, resulting in high installation efficiency. Compared to an integral hydrogen frame without a high-voltage accessory installation space, this method eliminates the need to build supports elsewhere and occupy space elsewhere, resulting in better space utilization. Compared to the existing technology of a split upper and lower hydrogen frame, the manufacturing process requirements are relatively lower. The inner and outer frames are no longer directly connected, eliminating tolerance requirements between them, reducing processing difficulty, and avoiding the need to grind the mounting holes during assembly.

[0024] 2. The hydrogen fuel cell truck of this application has its fuel cell engine located below the cab floor and on top of the front axle. The fuel cell cooling system is located on the front side of the front axle. The fuel cell engine and the fuel cell cooling system are close together with short piping, reducing the cooling pipe length from 15 meters to about 1 meter. The small height difference reduces the power requirement for the water pump, saving energy and protecting the environment, and improving cooling efficiency. Furthermore, due to the improved cooling efficiency, the number of cooling fans is reduced, and the radiator size is reduced. At the same time, the fuel cell cooling system is located on the front side of the front axle, resulting in low wind resistance. This allows for effective utilization of vehicle speed, increasing airflow, improving power, and reducing energy consumption.

[0025] 3. The hydrogen fuel cell truck of this application has its power battery cooling system located close to the power battery module, which makes full use of space and facilitates the layout of pipes and wiring harnesses, greatly saving costs. The final assembly process is good, with the fuel cell cooling system located on the top of the front axle at the front of the frame, and the power battery cooling system located on the side of the frame, specifically above the gas storage tank. Compared with the existing technology where the fuel cell cooling system is arranged on the hydrogen frame, the installation phase no longer requires high-altitude work, the height of the water tank can be guaranteed to be below 1.7 meters, the coolant filling is convenient, the cooling pipes are greatly shortened, the space occupied is small, the radiator assembly line assembly station layout is more flexible, and the labor intensity is reduced.

[0026] Due to the nested frame structure of the inner and outer frames, it is compatible with all types of fuel cell vehicle models. By adding a side-mounted radiator, it can accommodate both large and small power fuel cells, improve the versatility of components, reduce the number of special parts, and reduce manufacturing and management costs. The highly integrated inner frame saves a lot of small brackets. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 A schematic diagram of a fuel cell truck with a rear hydrogen storage frame structure provided in an embodiment of this application;

[0029] Figure 2 A schematic diagram of the structure of a fuel cell truck with a rear hydrogen storage frame structure provided in an embodiment of this application (with the skin removed);

[0030] Figure 3 A structural schematic diagram of a fuel cell truck including only a high-voltage inner frame platform is provided for embodiments of this application;

[0031] Figure 4 This is a schematic diagram of the chassis of the fuel cell truck provided in an embodiment of this application;

[0032] Figure 5 A schematic diagram of the hydrogen storage outer frame device and high-pressure inner frame platform provided in the embodiments of this application in a fuel cell truck;

[0033] Figure 6 A schematic diagram of the structure of the hydrogen storage outer frame device and the high-pressure inner frame platform provided in the embodiments of this application;

[0034] Figure 7 This is a structural schematic diagram of the high-pressure inner frame platform provided in an embodiment of this application;

[0035] Figure 8 This is a schematic diagram of the structure of the hydrogen storage frame device provided in the embodiments of this application;

[0036] Figure label:

[0037] 1. Chassis; 11. First beam; 12. Second beam; 13. Front axle; 14. Middle axle; 15. Rear axle; 2. Cab; 3. Fuel cell engine; 31. Fuel cell cooling system; 4. Rear hydrogen storage frame structure; 400. Hydrogen storage outer frame device; 401. High-voltage inner frame platform; 41. Hydrogen frame; 42. Hydrogen cylinder; 43. Inner frame body; 44. Inspection door; 45. Skin; 46. Mounting seat; 3. Inner frame body; 431. Inner frame base; 432. Inner frame mounting seat; 51. High-voltage distribution box; 52. Vehicle auxiliary DC transformer; 53. Five-in-one controller; 7. Power battery module; 71. Power battery cooling system; 8. Battery; 9. Motor; 10. Motor cooling system. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this application clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0039] like Figures 1 to 8 As shown, this application discloses an embodiment of a rear hydrogen storage frame structure 4, which includes a hydrogen storage outer frame device 400 and a high-pressure inner frame platform 401.

[0040] The hydrogen storage frame device 400 includes a hydrogen frame 41 and several hydrogen cylinders 42. The hydrogen frame 41 has a frame structure (see...). Figure 5 and Figure 8 The hydrogen cylinder 42 is placed in the frame structure. The bottom end of the hydrogen frame 41 is fixed to the vehicle frame 1, and a hollow cavity is formed between the bottom of the hydrogen frame 41 and the vehicle frame 1.

[0041] The high-pressure inner frame platform 401 is enclosed within a hollow cavity, and there is a certain gap between the top and sides of the high-pressure inner frame platform 401 and the hydrogen frame 41. The high-pressure inner frame platform 401 is used to install multiple high-pressure accessories, and the bottom end of the high-pressure inner frame platform 401 is also fixed to the vehicle frame 1.

[0042] The rear hydrogen storage frame structure 4 of this application comprises two parts: a hydrogen storage outer frame device 400 and a high-pressure inner frame platform 401. These two parts are independent of each other, resulting in high assembly efficiency. During actual assembly, multiple high-pressure accessories are first installed onto the high-pressure inner frame platform 401. Simultaneously, several hydrogen cylinders 42 are installed into the hydrogen frame 41, forming the hydrogen storage outer frame device 400. During assembly, the two parts are assembled independently and simultaneously. Then, the high-pressure inner frame platform 401 is first installed and fixed to the vehicle frame 1, and the hydrogen storage outer frame device 400 is then fixed to the vehicle frame 1, with the high-pressure inner frame platform 401 encased within a hollow cavity. This application employs a frame design, where the hydrogen storage outer frame device 400 encloses the high-pressure inner frame platform 401, and the assembly does not interfere with each other. This ingenious design significantly improves the final assembly process performance and increases production efficiency.

[0043] The rear hydrogen storage frame structure of this application, compared with the existing integrated hydrogen frame with high-pressure accessory installation space, eliminates the need to drill into the hydrogen frame to install each high-pressure accessory piece by piece. Instead, it directly installs and forms the high-pressure inner frame platform 401, which is assembled outside the hydrogen frame. This provides ample assembly space and eliminates the need to disassemble and reassemble the hydrogen frame skin, resulting in high installation efficiency. Compared with the integrated hydrogen frame without high-pressure accessory installation space, it eliminates the need to build supports elsewhere and occupy space elsewhere, resulting in good space utilization. Compared with the existing upper and lower split hydrogen frames, the production process requirements are relatively low, eliminating the need for high requirements on the consistency of production of the upper and lower frames and the joints. The assembly process has good overall integrity, and is aesthetically pleasing and safe.

[0044] It is worth noting that the frame design avoids interference between the high-pressure accessory section (the high-pressure inner frame platform 401 of this application) and the hydrogen storage section (the hydrogen storage outer frame device 400 of this application), reduces the dependence of the high-pressure accessory on the hydrogen storage outer frame device 400, and allows the pipeline bundles related to the high-pressure inner frame platform 401 to be installed in advance (where the pipelines can be molded pipes) and accommodated in the gap between the hollow cavity and the hydrogen storage outer frame device, thereby improving the installation processability and assembly efficiency.

[0045] Compared to the existing split hydrogen frame technology, it has better manufacturing process. The inner and outer frames are no longer directly connected, and there are no tolerance requirements between them, which reduces the processing difficulty and avoids the need to grind the mounting holes during assembly.

[0046] The 401 high-voltage inner frame platform is highly integrated, with a simple structure that saves on many small supports and reduces production costs.

[0047] The rear hydrogen storage frame structure of this application has a universal structure and installation form of the hydrogen storage outer frame device 400, and the high-pressure inner frame platform 401 has strong expandability. This application mainly discloses the use of the high-pressure inner frame platform 401 to install multiple high-pressure accessories. In fact, it can also be used to arrange other things, expand the available space of the vehicle, reduce the dependence of various accessories on the hydrogen storage outer frame device 400, and meet the needs of flat assembly of the whole vehicle.

[0048] In one embodiment, the high-voltage inner frame platform 401 includes an inner frame body 43. Multiple high-voltage accessories include a high-voltage distribution box 51, a vehicle auxiliary DC transformer 52, and a five-in-one controller 53. The high-voltage distribution box 51, the vehicle auxiliary DC transformer 52, and the five-in-one controller 53 are all mounted on the inner frame body 43. The vehicle auxiliary DC transformer 52 is located between the high-voltage distribution box 51 and the five-in-one controller 53, arranged from left to right. A battery 8 is disposed on the inner frame body 43 adjacent to the vehicle auxiliary DC transformer 52. Both the battery 8 and the vehicle auxiliary DC transformer 52 are arranged in the middle of the inner frame body 43, i.e., the battery 8 is located between the high-voltage distribution box 51 and the five-in-one controller 53.

[0049] The high-voltage distribution box 51 provides high-voltage power distribution for the entire vehicle, the vehicle auxiliary DC transformer 52 is used to supply power to the fuel cell cooling system 31, and the five-in-one controller 53 is used to control the power steering pump controller, the motor controller, the air conditioning system controller, the air compressor controller, and the vehicle DC transformer.

[0050] The high-voltage inner frame platform 401 of this application is highly integrated, integrating the high-voltage distribution box 51, the vehicle auxiliary DC transformer 52, the five-in-one controller 53 and the battery 8 into the inner frame body 43, which has high space utilization and is convenient for installation and maintenance.

[0051] like Figure 3 As shown, the highly integrated high-pressure inner frame platform 401 can ensure that the whole vehicle can run directly in pure electric mode. In the actual processing and production process, the high-pressure inner frame platform 401 and the hydrogen storage outer frame device 400 can be installed and operated independently. After the high-pressure inner frame platform 401 is installed first, the whole vehicle can run directly in pure electric mode and be debugged. After the hydrogen storage outer frame device 400 is ready, it can be installed and debugged in hydrogen refueling mode, reducing the vehicle's dependence on the hydrogen frame and improving production and assembly efficiency.

[0052] like Figure 7 and Figure 8As shown, in one embodiment, the hydrogen frame 41 has a downwardly extending mounting seat 46 at its bottom, which is fixed to the side wall of the vehicle frame 1. The inner frame body 43 includes an inner frame base 431 and an inner frame mounting seat 432. The inner frame mounting seat 432 is fixed to the vehicle frame 1, and the inner frame base 431 is in close contact with the top surface of the vehicle frame 1. The hydrogen storage outer frame device 400 of this application is installed and fixed by the mounting seat 46, and the high-pressure inner frame platform 401 is installed and fixed by the inner frame mounting seat 432. They are independent of each other and are stable and reliable.

[0053] like Figure 8 As shown, the hydrogen storage outer frame device 400 further includes inspection doors 44 and a skin 45. The two inspection doors 44 are respectively installed on the left and right sides of the inner frame body 43, and the skin 45 is installed on the front and rear sides of the inner frame body 43. Inspection doors or quick-release mechanisms can be installed in the area below the skin as needed. In actual use, when a malfunction occurs, the inspection doors 44 are generally removed for inspection and repair, which is convenient and quick.

[0054] This application also discloses an embodiment of a hydrogen fuel cell truck, which includes a cab 2, a fuel cell engine 3, and the aforementioned rear-mounted hydrogen storage frame structure 4. The cab 2 is fixed above the head of the frame 1, and the fuel cell engine 3 is located between the first main beam 11 and the second main beam 12 of the frame 1, and is disposed below the floor of the cab 2. The fuel cell engine 3 is disposed on top of the front axle 13; a fuel cell cooling system 31 is correspondingly provided for the fuel cell engine 3, and is disposed on the front side of the front axle 13 for cooling the fuel cell engine 3.

[0055] The first main beam 11 and the second main beam 12 of the frame 1 are arranged in parallel and spaced apart. The rear hydrogen storage frame structure 4 is fixed above the frame 1 and arranged behind the cab 2.

[0056] Specifically, a front axle 13 is provided at the head of the frame 1, and the front axle 13 is perpendicular to the first main beam 11 and the second main beam 12. A middle axle 14 is provided in the middle of the frame 1, and the middle axle 14 is perpendicular to the first main beam 11 and the second main beam 12.

[0057] The hydrogen fuel cell truck of this application has a rear hydrogen storage frame structure 4 fixed above the frame 1, so that the bottom of the frame 1 has enough space to place other systems; and the rear hydrogen storage frame structure 4 is arranged behind the cab 2, making full use of the gap between the cab 2 and the cargo box, thereby improving the space utilization of the entire vehicle.

[0058] It is worth noting that the rear hydrogen storage frame structure of this application is applicable to all vehicles with rear hydrogen storage frame structures and to all commercial vehicles. The accompanying drawings of this application use trucks as an example of commercial vehicles.

[0059] It is worth noting that the fuel cell engine 3 is equipped with a fuel cell cooling system 31, which is currently located on top of the hydrogen frame 41. The existing arrangement of the fuel cell cooling system 31 presents problems such as difficult installation and maintenance, high drag coefficient, and poor assembly processability. Furthermore, due to its high installation position, the fuel cell cooling system 31 requires a large water pump power, resulting in insufficient energy efficiency. Additionally, the fuel cell cooling system 31 is located far from the fuel cell engine 3, requiring long piping, which makes manufacturing and installation inconvenient and costly.

[0060] The hydrogen fuel cell truck of this application has the fuel cell engine 3 located below the floor of the cab 2 and on top of the front axle 13, and the fuel cell cooling system 31 located on the front side of the front axle 13. The two are close to each other, with short pipelines and small height difference, resulting in low water pump power requirements, energy saving and environmental protection. Furthermore, the fuel cell cooling system 31 is located on the front side of the front axle 13, resulting in low wind resistance, and the front-mounted fuel cell cooling system 31 can make full use of the wind during driving.

[0061] For the hydrogen fuel cell truck of this application, only the front-mounted fuel cell cooling system 31 can meet the requirements of the current fuel cell stack. The cooling pipe route is shortened from 15 meters to about 1 meter. The shortening of the pipe route reduces the power requirement of the water pump, which can reduce the cost of the water pump. Due to the improvement of cooling efficiency, the cooling fan is reduced and the radiator volume is reduced.

[0062] In one embodiment, the hydrogen fuel cell truck also includes an electric motor 9 and an electric motor cooling system 10. The electric motor 9 is disposed adjacent to and below the high-voltage inner frame platform 401. The electric motor cooling system 10 is used to dissipate heat from the electric motor 9 and is arranged on the outer side of the frame 1. The electric motor cooling system 10 is located on the right end face of the high-voltage inner frame platform 401. This arrangement reduces the space occupancy rate inside the frame, improves space utilization, effectively utilizes the airflow on the side of the vehicle, supports efficient radiator operation, and improves heat dissipation rate. Especially for high-power fuel cell stacks, reducing the number of battery compartments allows space to be used for the fuel cell cooling system, meeting the heat dissipation power requirements of high-power fuel cell stacks.

[0063] The hydrogen fuel cell truck of this application is ingeniously designed, with the fuel cell cooling system 31 placed at the front and the motor cooling system 10 placed on the side. This solves the problems of wasted cooling power when the motor cooling system 10 is placed at the front and insufficient cooling power when the fuel cell cooling system 31 is placed on the side. The front-mounted fuel cell cooling system 31 provides efficient cooling, while the side-mounted motor cooling system 10 provides just the right amount of cooling, making the arrangement reasonable.

[0064] In one embodiment, the high-voltage inner frame platform 401 includes an inner frame body 43. Multiple high-voltage accessories include a high-voltage distribution box 51, a vehicle auxiliary DC transformer 52, and a five-in-one controller 53. The high-voltage distribution box 51, the vehicle auxiliary DC transformer 52, and the five-in-one controller 53 are all mounted on the inner frame body 43. The vehicle auxiliary DC transformer 52 is located between the high-voltage distribution box 51 and the five-in-one controller 53, arranged from left to right. A battery 8 is disposed on the inner frame body 43 adjacent to the vehicle auxiliary DC transformer 52. Both the battery 8 and the vehicle auxiliary DC transformer 52 are arranged in the middle of the inner frame body 43, i.e., the battery 8 is located between the high-voltage distribution box 51 and the five-in-one controller 53.

[0065] The high-voltage distribution box 51 provides high-voltage power distribution for the entire vehicle, the vehicle auxiliary DC transformer 52 is used to supply power to the fuel cell cooling system 31, and the five-in-one controller 53 is used to control the power steering pump controller, the motor controller, the air conditioning system controller, the air compressor controller, and the vehicle DC transformer.

[0066] The high-voltage inner frame platform 401 of this application is highly integrated, integrating the high-voltage distribution box 51, the vehicle auxiliary DC transformer 52, the five-in-one controller 53 and the battery 8 into the inner frame body 43, which has high space utilization and is convenient for installation and maintenance.

[0067] In one embodiment, a middle axle 14 is provided in the middle of the frame 1, and the middle axle 14 is also vertically connected to the first main beam 11 and the second main beam 12. The hydrogen fuel cell truck is equipped with a power battery module 7, which is used to store electrical energy and supply power to the outside. The power battery module 7 is divided into two equal parts, which are respectively arranged on the left side of the first main beam 11 and the right side of the second main beam 12. The power battery module 7 is located between the front axle 13 and the middle axle 14, and the power battery module 7 is offset from the hydrogen frame 41.

[0068] The hydrogen fuel cell truck of this application features a more rational arrangement of the power battery module 7, making full use of space. Preferably, the front side of the power battery module 7 and the rear side of the hydrogen frame 41 are located on the same plane.

[0069] In one embodiment, the hydrogen fuel cell truck also includes a power battery cooling system 71 for cooling the power battery module 7. The power battery cooling system 71 includes a compressor and a condenser. The compressor is located on the left side of the first beam (11), and the condenser is located on the right side of the second beam (12). In the forward and backward direction, both the compressor and the condenser are located between the power battery module 7 and the front axle 13. In the vertical direction, both the compressor and the condenser are located below the hydrogen frame 41.

[0070] The power battery cooling system 71 of this application is located close to the power battery module 7, which makes full use of space and facilitates the arrangement of pipes and wiring harnesses, thus greatly saving costs.

[0071] The hydrogen fuel cell truck of this application has good assembly processability. The fuel cell cooling system 31 is arranged at the head of the frame 1, and the power battery cooling system 71 is set on the side of the frame 1. Compared with the existing technology where the fuel cell cooling system 31 is installed on the top of the hydrogen frame, it eliminates the need for high-altitude operations. The height of the water tank can be guaranteed to be below 1.7 meters. Coolant filling is convenient, the cooling pipeline is greatly shortened, and the space occupied is small. The assembly station layout of the radiator assembly line is more flexible, reducing labor intensity.

[0072] Compared to the front-mounted fuel cell cooling system 31, the distance between the side-mounted power battery cooling system 71 and the power battery module 7 in this hydrogen fuel cell truck application is shortened by 2 meters. Due to the nested frame structure of the inner and outer frames, it is compatible with all types of fuel cell vehicle models. By adding a side-mounted radiator, it can accommodate both large and small power fuel cells, improve the commonality of components, reduce the number of special parts, and reduce manufacturing and management costs. The highly integrated inner frame saves a lot of small brackets.

[0073] like Figure 7 and Figure 8 As shown, in one embodiment, the hydrogen frame 41 has a downwardly extending mounting seat 46 at its bottom, which is fixed to the side wall of the vehicle frame 1. The inner frame body 43 includes an inner frame base 431 and an inner frame mounting seat 432. The inner frame mounting seat 432 is fixed to the vehicle frame 1, and the inner frame base 431 is in close contact with the top surface of the vehicle frame 1. The hydrogen storage outer frame device 400 of this application is installed and fixed by the mounting seat 46, and the high-pressure inner frame platform 401 is installed and fixed by the inner frame mounting seat 432. They are independent of each other and are stable and reliable.

[0074] like Figure 8 As shown, the hydrogen storage outer frame device 400 further includes inspection doors 44 and a skin 45. The two inspection doors 44 are respectively installed on the left and right sides of the inner frame body 43, and the skin 45 is installed on the rear side of the inner frame body 43. In actual use, when a malfunction occurs, the inspection doors 44 are generally removed for maintenance, which is convenient and quick.

[0075] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" 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; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0076] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0077] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A hydrogen fuel cell truck, characterized in that, Include: The cab (2) is fixed above the head of the frame (1); A fuel cell engine (3) is located between the first beam (11) and the second beam (12) of the frame (1) and is arranged below the floor of the cab (2). The fuel cell engine (3) is arranged on the top of the front axle (13). The fuel cell engine (3) is equipped with a fuel cell cooling system (31) for cooling the fuel cell engine (3) and is located on the front side of the front axle (13). The rear hydrogen storage frame structure (4) is fixed above the vehicle frame (1) and arranged on the back of the cab (2); the rear hydrogen storage frame structure includes a hydrogen storage outer frame device (400) and a high-pressure inner frame platform (401). The hydrogen storage outer frame device (400) includes a hydrogen frame (41) and several hydrogen cylinders (42). The hydrogen frame (41) adopts a frame structure, and the hydrogen cylinders (42) are placed in the frame structure. The bottom end of the hydrogen frame (41) is fixed to the vehicle frame (1), and a hollow cavity is formed between the bottom of the hydrogen frame (41) and the vehicle frame (1). The high-pressure inner frame platform (401) is covered in the hollow cavity, and the top and sides of the high-pressure inner frame platform (401) have a certain gap with the hydrogen frame (41). The high-pressure inner frame platform (401) is used to install multiple high-pressure accessories, and the bottom end of the high-pressure inner frame platform (401) is also fixed to the vehicle frame (1). The high-voltage inner frame platform (401) includes an inner frame body (43), and the multiple high-voltage accessories include a high-voltage distribution box (51), a vehicle auxiliary DC transformer (52), and a five-in-one controller (53); the high-voltage distribution box (51), the vehicle auxiliary DC transformer (52), and the five-in-one controller (53) are all installed on the inner frame body (43), and the vehicle auxiliary DC transformer (52) is located between the high-voltage distribution box (51) and the five-in-one controller (53); the inner frame body (43) has a battery (8) installed near the vehicle auxiliary DC transformer (52); In the actual assembly process, multiple high-pressure accessories are first installed on the high-pressure inner frame platform (401); at the same time, several hydrogen cylinders (42) are installed in the hydrogen frame (41) to form a hydrogen storage outer frame device (400); during the assembly process, the two are independent of each other and are assembled at the same time. Then, the high-pressure inner frame platform (401) is first installed and fixed on the frame (1), and then the hydrogen storage outer frame device (400) is fixed on the frame (1), and the high-pressure inner frame platform (401) is covered in the hollow cavity; The hydrogen fuel cell truck also includes an electric motor (9) and an electric motor cooling system (10), the electric motor (9) being disposed adjacent to the lower part of the high-pressure inner frame platform (401), and the electric motor cooling system (10) being disposed on the right end face of the high-pressure inner frame platform (401) for dissipating heat from the electric motor (9).

2. A hydrogen fuel cell truck as described in claim 1, characterized in that: The hydrogen fuel cell truck is equipped with a power battery module (7), which is divided into two equal parts and arranged on the left side of the first beam (11) and the right side of the second beam (12), respectively. The power battery module (7) is located between the front axle (13) and the middle axle (14), and the power battery module (7) is staggered from the hydrogen frame (41).

3. A hydrogen fuel cell truck as described in claim 2, characterized in that: The hydrogen fuel cell truck also includes a power battery cooling system (71) for cooling the power battery module (7); the power battery cooling system (71) includes a compressor and a condenser, which are respectively located on the left side of the first beam (11) and the right side of the second beam (12) in the left and right directions, respectively.

4. A hydrogen fuel cell truck as described in claim 1, characterized in that: The bottom of the hydrogen frame (41) is provided with a downwardly extending mounting seat (46), which is fixed to the side wall of the frame (1); the inner frame body (43) includes an inner frame base (431) and an inner frame mounting seat (432), which is fixed to the frame (1), and the inner frame base (431) is close to the top surface of the frame (1); The hydrogen storage outer frame device (400) also includes an inspection door (44) and a skin (45); the two inspection doors (44) are respectively installed on the left and right sides of the inner frame body (43), and the skin (45) is installed on the front and rear sides of the inner frame body (43).

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