Vehicle-mounted low-pressure solid hydrogen storage heat exchange device and method thereof

By designing a vehicle-mounted low-pressure solid-state hydrogen storage and heat exchange device, the problem of insufficient safety and portability in the existing high-pressure hydrogen storage technology has been solved, and the safety, convenience and efficient storage and transportation of low-pressure solid-state hydrogen storage are achieved.

CN119435977AActive Publication Date: 2025-02-14HUNAN LIANCHENG TRACK EQUIP CO LTD
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Patent Information

Application Number
CN202411738209.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-29
Publication Date
2025-02-14
Estimated Expiration
2044-11-29

AI Technical Summary

Technical Problem

The existing high-pressure hydrogen storage technology has poor safety, high equipment complexity, high cost and inconvenient mobility, and it is difficult to effectively solve the convenience and safety requirements of hydrogen energy storage and transportation.

Method used

A vehicle-mounted low-pressure solid-state hydrogen storage and heat exchange device is designed, including solid-state hydrogen storage modules, container modules and heat exchange modules on the trailer board. The equipment complexity is reduced through modular design and the heat exchange method is used to improve hydrogen storage efficiency. and security.

Benefits of technology

It reduces the complexity and cost of hydrogen storage equipment, while improving safety and portability, provides convenience for hydrogen storage and transportation, and reduces the energy consumption of hydrogen charging and discharging through heat pump heat exchange.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to the technical field of solid hydrogen storage, in particular to a vehicle-mounted low-pressure solid hydrogen storage heat exchange device and a method thereof.The vehicle-mounted low-pressure solid hydrogen storage heat exchange device comprises a trailer plate, a solid hydrogen storage module is mounted on the trailer plate, and a container module for protecting the solid hydrogen storage module is mounted on the trailer plate; a heat exchange module for dissipating heat and supplying heat when the solid hydrogen storage module is charged and discharged with hydrogen is arranged in the container module, and an electrical system for controlling the whole solid hydrogen storage heat exchange system is also arranged in the container module. The solid-state hydrogen storage and heat exchange system is modularized, simplified and lightened, the complexity of existing high-pressure hydrogen storage equipment is greatly reduced, the cost is reduced, meanwhile, the movable characteristic is achieved, compared with high-pressure hydrogen storage, the high-pressure hydrogen storage equipment is safer and more reliable, convenience is provided for storage and transportation of hydrogen energy, and the high-pressure hydrogen storage equipment is suitable for popularization and application. And the energy consumption of hydrogen charging and discharging is also reduced by adopting a heat exchange working mode of a heat pump.
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Description

Technical Field

[0001] The present invention relates to the technical field of solid-state hydrogen storage, and in particular to a vehicle-mounted low-pressure solid-state hydrogen storage heat exchange device and a method thereof. Background Art

[0002] Hydrogen energy is a secondary energy source with abundant sources, green and low carbon, and wide application. It helps to absorb renewable energy such as wind energy and solar energy on a large scale, and can realize peak load regulation and energy storage of power grid. Secondly, its production also promotes the generation of syngas, which is conducive to the development of alternative fuel production routes, improving fuel supply in remote areas, and promoting social, economic and environmental development. Furthermore, as a clean energy, hydrogen energy helps to reduce the proportion of fossil energy, improve the level of clean development, and at the same time build a multi-energy complementary energy supply system to achieve energy transformation and upgrading.

[0003] However, moving hydrogen is quite tricky. Due to its low density and high pressure requirements, its storage and transportation costs are relatively high, and it requires the construction of a complex hydrogen infrastructure. It costs a lot of money to transfer hydrogen, even in small quantities. Compared with high-pressure hydrogen storage, low-pressure solid-state hydrogen storage is relatively safer and is not limited to hydrogen storage stations. The charging and discharging of low-pressure solid-state hydrogen storage involves the release and absorption of energy, and the heat exchange system has become the key to the entire hydrogen storage system.

[0004] To this end, we urgently need to study an on-vehicle low-pressure solid-state hydrogen storage and heat exchange device and method. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a vehicle-mounted low-pressure solid-state hydrogen storage and heat exchange device and method thereof, which solves the technical problems of the prior art that high-pressure hydrogen storage has poor safety, complex equipment, high cost, and is not easy to move. It reduces the safety caused by the high pressure of the hydrogen storage equipment and the complexity of the equipment, while achieving the movable characteristic, thereby facilitating the storage and transportation of hydrogen energy.

[0006] To solve the above technical problems, the present invention provides the following technical solutions: a vehicle-mounted low-pressure solid-state hydrogen storage heat exchange device, comprising a trailer board, a solid-state hydrogen storage module is installed on the trailer board, a container module for protecting the solid-state hydrogen storage module is installed on the trailer board, a heat exchange module for dissipating heat and supplying heat to the solid-state hydrogen storage module when charging and discharging hydrogen is arranged in the container module, and an electrical system for controlling the entire solid-state hydrogen storage heat exchange system is also arranged in the container module.

[0007] The solid-state hydrogen storage module includes a water tank installed in an array on the trailer board, and the water tank is filled with heat exchange fluid. Solid-state hydrogen storage rods are installed in an array in the water tank, and an air pipe is installed at the rear end of the solid-state hydrogen storage rod. Multiple air pipes are connected in series to form a hydrogen bus. A hydrogen air pipe is installed at the gathering point of the hydrogen bus, and a hydrogen external air valve is installed on the hydrogen air pipe.

[0008] As a further optimization scheme of the present invention, the back array of the water tank is provided with a plug-in cavity corresponding to the solid hydrogen storage rod, and the end surface of the plug-in cavity is installed with an annular buckle for limiting and fixing the solid hydrogen storage rod.

[0009] As a further optimization solution of the present invention, a water tank exhaust valve is installed on the water tank, and a liquid inlet interface and a liquid outlet interface are respectively installed on the bottom and top side of the front side of the water tank.

[0010] As a further optimization scheme of the present invention, the container module includes a container frame installed on the trailer board and located on the outside of the solid-state hydrogen storage module, a partition bracket is installed in the container skeleton above the solid-state hydrogen storage module, an air inlet grille is installed on the container skeleton, and container doors are symmetrically installed on the front and rear sides of the container skeleton.

[0011] As a further optimization scheme of the present invention, the heat exchange module includes a heat exchanger unit installed on a partition bracket, and the heat exchanger unit is connected to the water tank through a pipeline. A guide air duct is installed on the top of the heat exchanger unit, and an unpowered wind hood is installed on the top of the container frame to assist in the discharge of escaped hydrogen.

[0012] As a further optimization scheme of the present invention, the pipeline is divided into a liquid inlet pipe and a return pipe, and the two are respectively connected to the liquid inlet interface at the bottom of the front side of the water tank and the liquid outlet interface on the top side.

[0013] As a further optimization solution of the present invention, the plurality of heat exchange modules are respectively installed on the partition bracket corresponding to the plurality of solid-state hydrogen storage module arrays.

[0014] As a further optimization scheme of the present invention, the electrical system includes a control box installed on the container frame, in which a plurality of electrical cables are installed, and the electrical cables are electrically connected to the heat exchanger units respectively, and the other end thereof is installed with an external power strip located on one side of the container frame.

[0015] A method for using a vehicle-mounted low-pressure solid-state hydrogen storage and heat exchange device comprises the following steps:

[0016] S1: First, insert the solid hydrogen storage rod into the plug-in cavity on the water tank and lock it with a ring buckle. Then, connect the air pipes to the solid hydrogen storage rods respectively, and connect them in series to form a hydrogen bus and then connect them to the hydrogen air pipe. Install a hydrogen external air valve at the joint between the two for control.

[0017] S2: First, hoist the heat exchange module onto the middle partition bracket inside the container, then hoist and install the container module on the top of the solid hydrogen storage module to cover it completely, and then connect the two ends of the liquid inlet pipe and the return pipe in the pipeline to the heat exchanger unit and the water tank respectively, and discharge the exhaust gas generated by the operation of the heat exchanger unit through the guide air duct.

[0018] S3: Then install the electrical system on the container module, and connect the electrical cables to the heat exchanger unit. After the control box is powered on and issues a command, set the target temperature of the heat exchanger unit to 60℃ to start. The heat exchanger unit starts the compressor to transport heat from the air through the reverse Carnot cycle to heat the heat exchange liquid, guide the air duct to discharge the exhaust gas, start the water pump to input the heated heat exchange liquid into the water tank through the pipeline, so that the solid hydrogen storage rod absorbs heat and releases hydrogen. Open the hydrogen external gas valve and transmit gas to the outside through the hydrogen gas pipe.

[0019] S4: When filling hydrogen, the control box is powered on and issues a command, setting the target temperature of the heat exchanger unit to 10℃ and starting it. The heat exchanger unit starts the compressor to transfer heat from the heat exchange fluid to the air through the Carnot cycle, guides the air duct to discharge the exhaust gas, and starts the water pump to input the cooled heat exchange fluid into the water tank through the pipeline, thereby dissipating the heat generated by the solid hydrogen storage rod through the hydrogen gas pipe to cool it down, ensuring the progress of hydrogen filling and degassing. In this process, all the container doors are opened to facilitate the exhaust gas discharge.

[0020] By means of the above technical solution, the present invention provides a vehicle-mounted low-pressure solid-state hydrogen storage heat exchange device and method thereof, which has at least the following beneficial effects:

[0021] 1. The present invention modularizes, simplifies and lightweights the solid-state hydrogen storage heat exchange system, greatly reducing the complexity of existing high-pressure hydrogen storage equipment, reducing costs while achieving mobility. Compared with high-pressure hydrogen storage, it is safer and more reliable, providing convenience for the storage and transportation of hydrogen energy. The heat exchange working mode of the heat pump also reduces the energy consumption of hydrogen charging and discharging.

[0022] 2. The present invention heats the heat exchange liquid through a heat exchange unit, and circulates the heat exchange liquid in the water tank through a water pump, thereby continuously providing heat for the solid hydrogen storage rod in the water tank, so that the hydrogen release equilibrium pressure of the solid hydrogen storage rod can be stabilized, avoiding the reduction of the hydrogen release equilibrium pressure, causing the hydrogen release rate to decrease or even stop the hydrogen release.

[0023] 3. The present invention cools the heat exchange liquid through a heat exchange unit, and also circulates the heat exchange liquid in the water tank through a water pump, so that the heat generated when the solid hydrogen storage rod in the water tank absorbs hydrogen is circulated and absorbed by the low-temperature heat exchange liquid, so that the hydrogen absorption equilibrium pressure of the solid hydrogen storage rod remains stable, avoiding the increase of the hydrogen absorption equilibrium pressure, resulting in a decrease in the hydrogen absorption efficiency or even cessation of hydrogen absorption.

[0024] 4. The heat exchange system of the present invention has a single cooling power greater than 40KW, a single heating power greater than 40KW, and a total heating and cooling power of 160KW, which can achieve a hydrogen charging and discharging efficiency of 10Kg / h. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0026] In the attached picture:

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the structure of the solid-state hydrogen storage and heat exchange system of the present invention after removing the container door;

[0029] Figure 3 This is a schematic diagram of the rear view structure of the solid-state hydrogen storage and heat exchange system of the present invention after removing the container door;

[0030] Figure 4 This is a schematic diagram of an independent enlarged structure of a solid-state hydrogen storage module of the present invention;

[0031] Figure 5 It is a schematic diagram of a partially enlarged rear view of the solid-state hydrogen storage module of the present invention.

[0032] In the figure: 1. trailer deck;

[0033] 2. Solid-state hydrogen storage module; 21. Water tank; 22. Solid-state hydrogen storage rod; 23. Air pipe; 24. Hydrogen bus; 25. Hydrogen air pipe; 26. Hydrogen external air valve; 27. Ring buckle; 28. Water tank exhaust valve;

[0034] 3. Container module; 31. Container frame; 32. Partition bracket; 33. Air inlet grille; 34. Container door;

[0035] 4. heat exchange module; 41. heat exchange unit; 42. pipeline; 421. liquid inlet pipe; 422. return pipe; 43. guide air duct; 44. unpowered hood;

[0036] 5. Electrical system; 51. Control box; 52. Electrical cables; 53. External power strip. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Example 1

[0039] Based on the existing problems of poor safety, complex equipment, high cost and inconvenience in mobility of high-pressure hydrogen storage in the prior art, this embodiment provides a vehicle-mounted low-pressure solid-state hydrogen storage heat exchange device and method, please refer to Figure 1-Figure 5 The embodiment provides a vehicle-mounted low-pressure solid-state hydrogen storage heat exchange device, which can reduce the safety and complexity of the equipment caused by the high pressure of the hydrogen storage equipment, and at the same time has the characteristics of being movable, which provides convenience for the storage and transportation of hydrogen energy. The vehicle-mounted low-pressure solid-state hydrogen storage heat exchange device includes a trailer plate 1, on which a solid-state hydrogen storage module 2 is installed, and on which a container module 3 for protecting the solid-state hydrogen storage module 2 is installed, and a heat exchange module 4 for dissipating heat and supplying heat to the solid-state hydrogen storage module 2 when charging and discharging hydrogen is arranged in the container module 3, and an electrical system 5 for controlling the entire solid-state hydrogen storage heat exchange system is also arranged in the container module 3, and the solid-state hydrogen storage module 2 is protected by the container module 3 and the heat exchange module 4 is supported, and when the solid-state hydrogen storage module 2 absorbs and discharges hydrogen, the heat generated by the solid-state hydrogen storage module 2 when absorbing hydrogen is dissipated by the heat exchange module 4, and heat is provided when the solid-state hydrogen storage module 2 is discharged, so as to ensure the normal use of the solid-state hydrogen storage module 2.

[0040] Since the high-pressure hydrogen storage in the prior art has poor safety and the equipment is complex and costly, the device is provided with a solid-state hydrogen storage module 2, which includes a water tank 21 installed in an array on the trailer board 1, and the water tank 21 is filled with a heat exchange liquid, and solid-state hydrogen storage rods 22 are installed in an array in the water tank 21, and an air pipe 23 is installed at the rear end of the solid-state hydrogen storage rod 22. A plurality of air pipes 23 are connected in series to form a hydrogen bus 24, and a hydrogen air pipe 25 is installed at the gathering point of the hydrogen bus 24. A hydrogen external air valve 26 is installed on the hydrogen air pipe 25. The solid-state hydrogen storage rod 22 is used to utilize Ti-Mn alloy for adsorption to achieve low-pressure hydrogen storage, which is safer and more reliable than high-pressure hydrogen storage.

[0041] In order to prevent the solid hydrogen storage rod 22 from shaking or even falling off during the movement, the device is provided with a plug-in cavity corresponding to the solid hydrogen storage rod 22 in an array on the back of the water tank 21, and a ring buckle 27 is installed on the end face of the plug-in cavity to limit and fix the solid hydrogen storage rod 22. A water tank exhaust valve 28 is installed on the water tank 21, and a liquid inlet interface and a liquid outlet interface are installed on the bottom and top of the front of the water tank 21, respectively. The solid hydrogen storage rod 22 is fixed in the plug-in cavity opened on the water tank 21 through the ring buckle 27, and the plug-in cavity as a whole is composed of a supporting partition with good thermal conductivity, thereby improving the heat exchange efficiency of the solid hydrogen storage rod 22. When the heat exchange liquid is first poured into the water tank 21, the gas in the water tank 21 is discharged through the water tank exhaust valve 28.

[0042] The exposed solid-state hydrogen storage module 2 is easily damaged by bumps, so the device is also provided with a container module 3, which includes a container frame 31 installed on the trailer board 1 and located on the outside of the solid-state hydrogen storage module 2, and a partition bracket 32 ​​is installed in the container frame 31 above the solid-state hydrogen storage module 2, and an air inlet grille 33 is installed on the container frame 31, and container doors 34 are symmetrically installed on the front and rear sides of the container frame 31. The container frame 31 provides certain protection for the solid-state hydrogen storage module 2, and the partition bracket 32 ​​provides support and installation interface for the heat exchange module 4 and the electrical system 5, and is a core load-bearing structure. The air inlet grille 33 provides an air intake channel for the heat exchange unit 41.

[0043] The heat exchange liquid in the water tank 21 alone is not enough to dissipate the heat generated when the solid hydrogen storage rod 22 is charged with hydrogen, and the solid hydrogen storage rod 22 needs to continuously absorb heat when releasing hydrogen, and the heat stored in the heat exchange liquid in the water tank 21 is not enough to support the heat supply. Therefore, the device is also provided with a heat exchange module 4, which includes a heat exchange unit 41 installed on the middle partition bracket 32, and the heat exchange unit 41 is connected to the water tank 21 through a pipeline 42, and a guide air duct 43 is installed on the top of the heat exchange unit 41, and a non-powered wind cap 44 for assisting in the discharge of the escaped hydrogen is installed on the top of the container frame 31. The pipeline 42 is divided into a liquid inlet pipe 421 and a reflux pipe 422, which are respectively connected to the liquid inlet interface at the bottom of the front of the water tank 21 and the liquid outlet interface on the top side. A plurality of heat exchange modules 4 are respectively mounted on the partition bracket 32 ​​in correspondence with a plurality of solid hydrogen storage modules 2 arrays. When the solid hydrogen storage rod 22 releases hydrogen and absorbs heat, the heat exchange unit 41 is started and its target temperature is set at 60°C. The heat exchange unit 41 starts the compressor to transport heat from the air through the reverse Carnot cycle to heat the heat exchange liquid, and the heated heat exchange liquid is pumped into the water tank 21 through the pipeline 42 by the water pump, so as to continuously provide heat for the solid hydrogen storage rod 22. When the solid hydrogen storage rod 22 is charged with hydrogen and releases heat, Start the heat exchanger unit 41 and set its target temperature at 10°C. The heat exchanger unit 41 starts the compressor to transfer heat from the heat exchange hot liquid to the air through the Carnot cycle, thereby continuously providing low-temperature heat exchange liquid to the water tank 21 to absorb and cool the heat generated when the solid hydrogen storage rod 22 is charged with hydrogen. The single cooling power of this heat exchange system is greater than 40KW, and the single heating power is greater than 40KW. The total heating and cooling power reaches 160KW, and the hydrogen charging and discharging efficiency can reach 10Kg / h.

[0044] The electrical system 5 includes a control box 51 installed on the container skeleton 31. A plurality of electrical cables 52 are installed in the control box 51, and the electrical cables 52 are electrically connected to the heat exchanger units 41 respectively. An external power socket 53 located on one side of the container skeleton 31 is installed at the other end thereof. The device is connected to an external power source through the external power socket 53, and the operation of the device is controlled by the control box 51.

[0045] Example 2

[0046] A method for using a vehicle-mounted low-pressure solid-state hydrogen storage and heat exchange device comprises the following steps:

[0047] S1: First, insert the solid hydrogen storage rod 22 into the plug-in cavity on the water tank 21, and lock the solid hydrogen storage rod 22 through the annular buckle 27, then connect the air pipes 23 to the solid hydrogen storage rods 22 respectively, and connect them in series to form a hydrogen bus 24 and then connect them to the hydrogen air pipe 25, and install a hydrogen external air valve 26 at the joint between the two for control.

[0048] S2: Then, the heat exchange module 4 is hoisted on the middle partition bracket 32 ​​inside the container, and then the container module 3 is hoisted and installed on the top of the solid hydrogen storage module 2 to cover it completely, and then the two ends of the liquid inlet pipe 421 and the return pipe 422 in the pipeline 42 are respectively connected to the heat exchanger unit 41 and the water tank 21, and the exhaust gas generated by the operation of the heat exchanger unit 41 is dissipated and discharged through the guide air duct 43.

[0049] S3: Then, the electrical system 5 is installed on the container module 3, and the electrical cable 52 is electrically connected to the heat exchanger unit 41. After the control box 51 is powered on and sends a command, the target temperature of the heat exchanger unit 41 is set to 60°C for startup. The heat exchanger unit 41 starts the compressor to transport heat from the air through the reverse Carnot cycle to heat the heat exchange liquid, guides the air duct 43 to discharge the exhaust gas, starts the water pump to input the heated heat exchange liquid into the water tank 21 through the pipeline 42, so that the solid hydrogen storage rod 22 absorbs heat and releases hydrogen, opens the hydrogen external gas valve 26, and transmits gas to the outside through the hydrogen gas pipe 25.

[0050] S4: During hydrogen charging, the control box 51 is powered on and issues a command to set the target temperature of the heat exchanger unit 41 to 10°C for startup. The heat exchanger unit 41 starts the compressor to transfer heat from the heat exchange fluid to the air through the Carnot cycle, guides the air duct 43 to discharge the exhaust gas, and starts the water pump to input the cooled heat exchange fluid into the water tank 21 through the pipeline 42, thereby dissipating and cooling the heat generated by the solid hydrogen storage rod 22 through the hydrogen gas pipe 25 during hydrogen charging, ensuring the progress of hydrogen charging and dehydrogenation, and in this process, all the container doors 34 are opened to facilitate the exhaust gas discharge.

[0051] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vehicle-mounted low-pressure solid-state hydrogen storage heat exchange device, comprising a trailer plate (1), characterized in that: A solid-state hydrogen storage module (2) is installed on the trailer plate (1), a container module (3) for protecting the solid-state hydrogen storage module (2) is installed on the trailer plate (1), a heat exchange module (4) for dissipating heat and supplying heat when the solid-state hydrogen storage module (2) is charged or discharged is arranged in the container module (3), and an electrical system (5) for controlling the entire solid-state hydrogen storage heat exchange system is also arranged in the container module (3); The solid-state hydrogen storage module (2) comprises a water tank (21) installed in an array on a trailer board (1), and the water tank (21) is filled with a heat exchange liquid. Solid-state hydrogen storage rods (22) are installed in an array in the water tank (21), and a gas pipe (23) is installed at the rear end of the solid-state hydrogen storage rod (22). A plurality of gas pipes (23) are connected in series to form a hydrogen bus (24), and a hydrogen gas pipe (25) is installed at the gathering point of the hydrogen bus (24), and a hydrogen external gas valve (26) is installed on the hydrogen gas pipe (25).

2. The vehicle-mounted low-pressure solid-state hydrogen storage heat exchange device according to claim 1, characterized in that: The back of the water tank (21) is provided with an array of plug-in cavities corresponding to the solid hydrogen storage rods (22), and the end faces of the plug-in cavities are provided with an annular buckle (27) for limiting and fixing the solid hydrogen storage rods (22).

3. The vehicle-mounted low-pressure solid-state hydrogen storage heat exchange device according to claim 2, characterized in that: The water tank (21) is provided with a water tank exhaust valve (28), and a liquid inlet interface and a liquid outlet interface are respectively provided at the bottom and top of the front side of the water tank (21).

4. The vehicle-mounted low-pressure solid-state hydrogen storage and heat exchange device according to claim 1, characterized in that: The container module (3) comprises a container frame (31) mounted on a trailer deck (1) and located outside the solid-state hydrogen storage module (2); a partition bracket (32) is mounted above the solid-state hydrogen storage module (2) in the container frame (31); an air inlet grille (33) is mounted on the container frame (31); and container doors (34) are symmetrically mounted on both the front and rear sides of the container frame (31).

5. The vehicle-mounted low-pressure solid-state hydrogen storage and heat exchange device according to claim 4, characterized in that: The heat exchange module (4) comprises a heat exchange unit (41) mounted on a partition bracket (32), and the heat exchange unit (41) is connected to a water tank (21) via a pipeline (42). A guide air duct (43) is mounted on the top of the heat exchange unit (41), and a non-powered wind cap (44) for assisting in the discharge of escaped hydrogen is mounted on the top of the container frame (31).

6. The vehicle-mounted low-pressure solid-state hydrogen storage and heat exchange device according to claim 5, characterized in that: The pipeline (42) is divided into a liquid inlet pipe (421) and a return pipe (422), which are respectively connected to the liquid inlet interface at the bottom of the front side of the water tank (21) and the liquid outlet interface at the top side.

7. The vehicle-mounted low-pressure solid-state hydrogen storage and heat exchange device according to claim 4, characterized in that: The plurality of heat exchange modules (4) are respectively mounted on the partition support (32) in an array corresponding to the plurality of solid hydrogen storage modules (2).

8. The vehicle-mounted low-pressure solid-state hydrogen storage and heat exchange device according to claim 4, characterized in that: The electrical system (5) comprises a control box (51) mounted on the container frame (31), wherein a plurality of electrical cables (52) are mounted in the control box (51), and the electrical cables (52) are respectively electrically connected to the heat exchanger units (41), and an external power socket (53) located on one side of the container frame (31) is mounted at the other end thereof.

9. A method for using the vehicle-mounted low-pressure solid-state hydrogen storage and heat exchange device according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1: First, insert the solid hydrogen storage rod (22) into the plug-in cavity on the water tank (21), and lock the solid hydrogen storage rod (22) through the annular buckle (27), then connect the air pipe (23) to the solid hydrogen storage rod (22) respectively, and connect them in series to form a hydrogen bus (24) and then connect them to the hydrogen air pipe (25), and install a hydrogen external air valve (26) at the joint of the two for control; S2: Then, the heat exchange module (4) is first hoisted on the middle partition bracket (32) inside the container, and then the container module (3) is hoisted and installed on the top of the solid hydrogen storage module (2) to cover it completely, and then the two ends of the liquid inlet pipe (421) and the return pipe (422) in the pipeline (42) are respectively connected to the heat exchange unit (41) and the water tank (21), and the exhaust gas generated by the operation of the heat exchange unit (41) is dispersed and discharged through the guide air duct (43); S3: Then, the electrical system (5) is installed on the container module (3), and the electrical cable (52) is electrically connected to the heat exchanger unit (41). After the control box (51) is powered on and a command is issued, the target temperature of the heat exchanger unit (41) is set to 60° C. to start. The heat exchanger unit (41) starts the compressor to transport heat from the air through the reverse Carnot cycle to heat the heat exchange liquid, guides the air duct (43) to discharge the exhaust gas, starts the water pump in the heat exchanger unit (41) to input the heated heat exchange liquid into the water tank (21) through the pipeline (42), so that the solid hydrogen storage rod (22) absorbs heat and releases hydrogen, opens the hydrogen external gas valve (26), and transmits gas to the outside through the hydrogen gas pipe (25); S4: During hydrogen charging, the control box (51) is powered on and issues a command to set the target temperature of the heat exchange unit (41) to 10°C for startup. The heat exchange unit (41) starts the compressor to transfer heat from the heat exchange fluid to the air through the Carnot cycle, and guides the air duct (43) to discharge the exhaust gas. The water pump of the heat exchange unit (41) is started to input the cooled heat exchange fluid into the water tank (21) through the pipeline (42), thereby dissipating and cooling the heat generated by the solid hydrogen storage rod (22) through the hydrogen gas pipe (25) during hydrogen charging, ensuring the progress of hydrogen charging and dehydrogenation. In this process, the container doors (34) are all opened to facilitate the exhaust gas discharge.

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