Solid hydrogen storage tank and manufacturing method thereof

Abstract

The invention belongs to the technical field of hydrogen storage equipment, and relates to a solid hydrogen storage tank and a manufacturing method thereof, the solid hydrogen storage tank comprises a tank body and a core heat exchanger arranged in the tank body; the core heat exchanger is arranged in the tank body and consists of a plurality of H-shaped expanded surface finned tubes, each H-shaped expanded surface finned tube comprises a heat exchange tube and a plurality of radiating fins arranged on the heat exchange tube, gaps among the fins are used as spaces for placing hydrogen storage materials, and the fins are arranged in sequence; a plurality of screen H-shaped expansion surface finned tubes are stacked up and down and fixed by tube clamps, and a plurality of screens are connected into a whole and fixed on a bracket at the upper part of the tank body. According to the core heat exchanger, the H-shaped expanded surface finned tube is adopted as a basic unit of the core heat exchanger, and the heat and mass transfer efficiency between a hydrogen storage material and a heat exchange medium is effectively improved by increasing the number and the area of the radiating fins. And meanwhile, the sequential arrangement mode is adopted, so that the core heat exchanger is filled with the hydrogen storage material more uniformly, and the hydrogen storage density and the hydrogen charging and discharging rate are further improved.

Description

Technical Field

[0001] The invention belongs to the technical field of hydrogen storage equipment and relates to a solid-state hydrogen storage tank and a manufacturing method thereof. Background Art

[0002] In the field of energy storage, hydrogen energy is regarded as an important part of the future energy system because of its clean, efficient and renewable characteristics. However, the safe and efficient storage of hydrogen has always been a key technical bottleneck restricting the large-scale application of hydrogen energy. Traditional hydrogen storage methods, such as high-pressure gaseous hydrogen storage and liquid hydrogen storage, have problems such as great safety risks, high energy consumption and high cost. Therefore, solid-state hydrogen storage technology, as a new type of hydrogen storage method, has gradually become a research hotspot due to its advantages such as high safety, high hydrogen storage density and easy transportation.

[0003] At present, solid-state hydrogen storage technology mainly relies on the ability of hydrogen storage materials to adsorb or absorb hydrogen. Among them, magnesium-based composite materials are regarded as one of the most promising solid-state hydrogen storage materials due to their high hydrogen storage density, abundant resources, and low cost. However, magnesium-based composite materials have problems such as low heat and mass transfer efficiency, easy pulverization of hydrogen storage materials, and easy expansion and deformation of hydrogen storage tanks during the process of hydrogen absorption and desorption, which seriously restrict their performance in practical applications.

[0004] The contradiction between hydrogen storage density and hydrogen charging and decharging rate: Increasing hydrogen storage density often means increasing the amount of hydrogen storage material filled, but this will cause the heat and mass transfer paths inside the hydrogen storage tank to become longer, thereby reducing the hydrogen charging and decharging rate. How to increase the hydrogen charging and decharging rate while ensuring the hydrogen storage density is a major challenge facing current solid-state hydrogen storage technology.

[0005] Stability issues of hydrogen storage materials: Magnesium-based composite materials are prone to pulverization during the cyclic absorption and desorption of hydrogen, which not only reduces the hydrogen storage performance but also may damage the hydrogen storage tank. In addition, the self-compacting effect of hydrogen storage materials will also lead to uneven stress distribution inside the tank, thus affecting the long-term stability and safety of the hydrogen storage tank.

[0006] Design and manufacturing challenges of hydrogen storage tanks: Since solid-state hydrogen storage involves complex heat and mass transfer processes, the design of hydrogen storage tanks needs to fully consider factors such as the thermal expansion and thermal conductivity of the material and the mechanical strength of the structure. However, most hydrogen storage tanks on the market currently have problems such as unreasonable design, complex manufacturing process, and high cost. Summary of the invention

[0007] In view of this, the object of the present invention is to provide a solid-state hydrogen storage tank and a method for manufacturing the same, which achieves an effective balance between the hydrogen storage density and the hydrogen charging and discharging rate by optimizing the design of the core heat exchanger, while improving the stability of the hydrogen storage material and the long-term reliability of the hydrogen storage tank.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a solid-state hydrogen storage tank, comprising a tank body, and a core heat exchanger arranged in the tank body; the core heat exchanger is arranged inside the tank body, and is composed of a plurality of screen H-shaped extended surface fin tubes, the H-shaped extended surface fin tubes comprising heat exchange tubes, and a plurality of heat dissipation fins arranged on the heat exchange tubes, the gaps between the fins are used as spaces for placing hydrogen storage materials, and are arranged in a sequential manner; a plurality of screen H-shaped extended surface fin tubes are stacked up and down, fixed by tube clamps, and a plurality of screens are connected as a whole and fixed on a bracket at the upper part of the tank body.

[0009] Optionally, the tank body is a vertical installation structure, including a cylinder, an upper end cover and a lower end cover respectively arranged above and below the cylinder, and support legs arranged outside the cylinder.

[0010] Optionally, a hydrogen storage material inlet is opened at the center of the upper end cover, and a hydrogen storage material outlet is opened at the center of the lower end cover.

[0011] Optionally, heat transfer oil inlet and outlet pipes are respectively provided in the cylinder, and the inlet and outlet of each layer of H-shaped extended surface fin tubes are respectively connected in parallel to the heat transfer oil inlet and outlet pipes to form multiple heat exchange pipelines; the inlet and outlet of the heat transfer oil inlet and outlet pipes pass through the tank head, and a metal compensator is provided at the connection to ensure the free expansion of the core heat exchanger and the heat transfer oil inlet and outlet pipes.

[0012] Optionally, the tank body is also provided with a plurality of interfaces, including a hydrogen inlet and outlet, a vacuum pump interface, a pressure gauge interface and a thermometer interface.

[0013] Optionally, the tank and the pipe are coated with an aluminum silicate insulation layer, and the outer protective plate is made of aluminum skin.

[0014] Optionally, the design temperature of the hydrogen storage tank is 400°C, the design pressure is 5MPa on the shell side and 1.6MPa on the tube side, the tank volume is 80L, the volume of the hydrogen storage material is 53L, the filling rate is 60%, the weight of the hydrogen storage material is 40kg, and the hydrogen absorption capacity is 2kg.

[0015] A method for manufacturing a solid-state hydrogen storage tank, applicable to a solid-state hydrogen storage tank as described above, comprises the following steps:

[0016] a. Construct a three-dimensional model structure of the hydrogen storage tank, use finite element analysis software to perform meshing and working condition simulation analysis, study the stress distribution of the hydrogen storage tank, and perform structural strength verification and failure analysis;

[0017] b. According to the hydrogen absorption and desorption temperature and pressure of the hydrogen storage material, combined with the performance of the tank material, the stress field and temperature field of the tank are analyzed to complete the safety design of the tank under high temperature and high pressure environment;

[0018] c. Based on the hydrogen absorption and desorption rate and heat change of the hydrogen storage material, a multi-parameter coupling mathematical model is established using finite element simulation technology to optimize the diameter and layout of the heat exchange medium pipeline and increase heat exchange fins to improve the uniformity of heat transfer in the hydrogen storage tank;

[0019] d. Select materials with excellent hydrogen embrittlement resistance and high mechanical strength as the tank material, and conduct performance evaluation and test verification of the parent material and hydrogen storage tank;

[0020] e. Carry out research on high-reliability tank welding packaging technology, and ensure reliable sealing of weld quality through welding structure design, welding process assessment and non-destructive testing technology;

[0021] f. Process the prototype of hydrogen storage tank, load hydrogen storage materials to conduct hydrogen charging and decharging tests, monitor the temperature gradient and stress-strain gradient during the hydrogen storage tank charging and decharging process, and evaluate and improve the uniformity of the temperature field and stress field of the hydrogen storage tank;

[0022] g. According to the calculation results of heat balance, material balance, stress and fatigue of hydrogen storage tank, improve the structure of hydrogen storage tank, disassemble it into sub-components for preparation and assembly;

[0023] h. Carry out acid washing, air pressure and water pressure tests on the inner surface of the hydrogen storage tank to ensure the consistency of the performance of the hydrogen storage tank;

[0024] i. Use comprehensive hydrogen absorption and desorption performance testing equipment for hydrogen storage tanks to conduct performance tests, including constant temperature hydrogen absorption flow-capacity test, constant temperature hydrogen desorption flow-capacity test, constant flow hydrogen desorption capacity test, constant pressure hydrogen desorption capacity test, hydrogen absorption and desorption process tank temperature distribution test and hydrogen absorption and desorption cycle process stress and strain distribution test.

[0025] Optionally, the manufacturing materials of the hydrogen storage tank include 316L stainless steel as the tank body material and the heat transfer medium tube bundle material, and copper as the heat exchange fin material.

[0026] Optionally, the performance testing equipment of the hydrogen storage tank can test the hydrogen storage capacity, hydrogen absorption pressure, hydrogen desorption temperature, time required to release the theoretical hydrogen storage capacity and hydrogen desorption purity of the hydrogen storage tank, and measure the temperature and stress-strain parameters of the hydrogen storage tank during the hydrogen absorption and desorption process in real time.

[0027] The beneficial effects of the present invention are:

[0028] 1) The present invention adopts H-shaped extended surface fin tube as the basic unit of the core heat exchanger, and effectively improves the heat and mass transfer efficiency between the hydrogen storage material and the heat exchange medium by increasing the number and area of ​​the heat dissipation fins. At the same time, the sequential arrangement method is adopted to make the filling of the hydrogen storage material inside the core heat exchanger more uniform, further improving the hydrogen storage density and the hydrogen charging and discharging rate;

[0029] 2) The present invention aims at the problem that magnesium-based composite materials are easy to pulverize during the cyclic absorption and desorption of hydrogen. The present invention optimizes the preparation process of hydrogen storage materials and adds stabilizers, thereby effectively improving the anti-pulverization ability and cyclic stability of hydrogen storage materials. In addition, by rationally designing the internal structure of the hydrogen storage tank, the self-compacting effect of the hydrogen storage material during the absorption and desorption of hydrogen is avoided, thereby extending the service life of the hydrogen storage tank;

[0030] 3) The modular design concept is adopted to disassemble the hydrogen storage tank into multiple parts that are easy to manufacture and assemble. At the same time, the mechanical strength and sealing performance of the hydrogen storage tank are improved by optimizing the selection of materials and welding processes. In addition, monitoring equipment such as temperature sensors and pressure sensors are set up to achieve real-time monitoring and early warning of the internal state of the hydrogen storage tank, further improving the safety and reliability of the hydrogen storage tank.

[0031] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0033] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0034] Figure 2 This is an internal top view.

[0035] Figure numerals: cylinder 1, upper end cover 2, lower end cover 3, heat exchange tube 4, fin 5, support leg 6, heat transfer oil inlet pipe 7, heat transfer oil outlet pipe 8, hydrogen storage material inlet 9, hydrogen storage material outlet 10, hydrogen inlet and outlet 11, thermometer interface 12, vacuum pump interface 13, pressure gauge interface 14. DETAILED DESCRIPTION

[0036] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and the features in the embodiments can be combined with each other without conflict.

[0037] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0038] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0039] See also Figure 1-2 , is a solid-state hydrogen storage tank, including a tank body, and a core heat exchanger arranged in the tank body; the core heat exchanger is arranged inside the tank body, and is composed of a plurality of screen H-shaped extended surface finned tubes, the H-shaped extended surface finned tubes include a heat exchange tube 4, and a plurality of heat dissipation fins 5 arranged on the heat exchange tube 4, the gaps between the fins 5 are used as spaces for placing hydrogen storage materials, and are arranged in a row; a plurality of screen H-shaped extended surface finned tubes are stacked up and down, fixed by a tube clamp, and a plurality of screens are connected and fixed to a bracket on the upper part of the tank body. The tank body is a vertical installation structure, including a cylinder 1, an upper end cover 2 and a lower end cover 3 respectively arranged above and below the cylinder 1, and a support leg 6 arranged outside the cylinder 1, and the upper end cover 2 is provided with a hydrogen storage material inlet 9 at the center position, and a hydrogen storage material outlet 10 is provided at the center position of the lower end cover 3. A heat transfer oil inlet pipe 7 and a heat transfer oil outlet pipe 8 are also provided in the cylinder 1. The inlet and outlet of each layer of the H-shaped extended surface finned tube are respectively connected in parallel to the heat transfer oil inlet and outlet pipes to form a plurality of heat exchange pipes 4. The inlet and outlet of the heat transfer oil inlet and outlet pipes pass through the tank head, and a metal compensator is provided at the connection to ensure the free expansion of the core heat exchanger and the heat transfer oil inlet and outlet pipes. A plurality of interfaces are also provided on the tank, including a hydrogen inlet and outlet 11, a vacuum pump interface 13, a pressure gauge interface 14 and a thermometer interface 12. The tank and the pipeline are coated with an aluminum silicate insulation layer, and the outer protective plate is made of aluminum skin.

[0040] In this embodiment, the design temperature of the hydrogen storage tank is 400°C, the design pressure is 5MPa on the shell side and 1.6MPa on the tube side, the tank volume is 80L, the volume of the hydrogen storage material is 53L, the filling rate is 60%, the weight of the hydrogen storage material is 40kg, and the hydrogen absorption capacity is 2kg.

[0041] In this embodiment, heat transfer oil is used as a heat exchange medium for heat exchange. The heat transfer oil inlet and outlet are respectively arranged at the lower and upper parts of the tank body, and the heat transfer oil is sent to the core heat exchanger for heating or cooling through a circulating pump. During the hydrogen absorption process, the cold heat transfer oil enters the core heat exchanger, and exchanges heat with the hydrogen storage material through the heat dissipation fins 5, thereby reducing the temperature of the hydrogen storage material and promoting hydrogen absorption. After the hydrogen absorption is completed, the heat transfer oil is discharged through the outlet for the next cycle. The dehydrogenation process is the opposite, and the high-temperature heat transfer oil enters the core heat exchanger to heat the hydrogen storage material to release hydrogen. During the dehydrogenation process, the temperature and pressure changes inside the tank body are monitored to ensure the smooth progress of the dehydrogenation process. After the dehydrogenation is completed, the heat transfer oil is also discharged through the outlet, cooled and prepared for the next use.

[0042] The present invention also discloses a method for manufacturing a solid-state hydrogen storage tank, which is applicable to the solid-state hydrogen storage tank as described above, and comprises the following steps:

[0043] a. Construct the 3D model structure of the hydrogen storage tank

[0044] First, Solidworks Simulation software was used to build a 3D model structure of the hydrogen storage tank. This step includes designing the geometry, size, and internal structure of the hydrogen storage tank, such as the heat exchange tube bundle, fin assembly, etc. Through 3D modeling, the design of the hydrogen storage tank can be intuitively displayed, providing a basis for subsequent analysis and optimization.

[0045] b. Finite element analysis

[0046] The mesh module of finite element analysis software (such as Comsol) is used to divide the 3D model of the hydrogen storage tank into a full structural network and generate a discretized mesh. Then, based on partial differential equations, material properties, design pressure and other conditions, the working conditions of the hydrogen storage tank are simulated and analyzed to study the stress distribution diagram of the hydrogen storage tank. According to the simulation results, structural strength verification and failure analysis are carried out to ensure the safety and reliability of the hydrogen storage tank under the design conditions.

[0047] c. Tank safety design

[0048] According to the hydrogen absorption and desorption temperature and pressure characteristics of the medium-temperature hydrogen-releasing magnesium-based composite hydrogen storage material, combined with the performance parameters of the tank material, the stress field and temperature field analysis of the hydrogen storage tank body is carried out. By simulating the working state of the hydrogen storage tank under high temperature and high pressure environment, the safety design of the tank body is completed. At the same time, sensors are arranged on the tank body to monitor the temperature and stress changes of the tank body during the hydrogen absorption and desorption process to prevent exceeding the allowable value and ensure the safe operation of the tank body.

[0049] d. Heat exchange structure design optimization

[0050] Based on the PCT test data of hydrogen storage materials' hydrogen absorption and desorption rates and absorbed heat at different temperatures, the finite element simulation technology was used to establish a multi-parameter coupling mathematical model with the thermal conductivity of porous hydrogen storage materials, the heat capacity of the heat-conducting medium, the heat transfer coefficient, and the temperature as boundary conditions. By simulating the heat conduction phenomenon during the hydrogen storage material's absorption / desorption process, the diameter and layout of the heat exchange medium pipeline were optimized, and heat exchange fins were added to the heat-conducting medium tube bundle to improve the uniformity of heat transfer in the hydrogen storage tank.

[0051] e. Material selection and evaluation

[0052] Select materials with excellent hydrogen embrittlement resistance and high mechanical strength as the tank body material of the hydrogen storage tank, such as 316L stainless steel. Before preparation, the parent material is tested for compatibility and material quality to ensure that the material meets the use requirements of the hydrogen storage tank. At the same time, the performance evaluation and test verification of the small hydrogen storage tank are carried out to evaluate the hydrogen storage performance of the hydrogen storage material and the sealing performance of the tank body.

[0053] f. High reliability tank welding packaging technology

[0054] Conduct research on high-reliability tank welding and packaging technology, ensure the reliable sealing of weld quality by designing a reasonable welding structure, evaluating the welding process, and combining a variety of non-destructive testing technologies (such as ultrasonic testing, radiographic testing, etc.). This step is crucial to reducing the tank leakage rate and improving the overall reliability of the hydrogen storage tank.

[0055] g. Principle prototype processing and testing

[0056] According to the results of simulation calculation, the prototype of hydrogen storage tank is processed. After filling the hydrogen storage material, the hydrogen charging and discharging test is carried out. The temperature gradient and stress-strain gradient during the hydrogen storage tank charging and discharging process are recorded in real time through monitoring equipment such as temperature sensors and stress-strain sensors. According to the test results, the uniformity of the temperature field and stress field of the hydrogen storage tank is evaluated and improved to optimize the performance of the hydrogen storage tank.

[0057] h. Structural improvement and component preparation

[0058] According to the calculation results of heat balance, material balance, stress and fatigue of hydrogen storage tank, the structural design of hydrogen storage tank is further improved. The hydrogen storage tank is disassembled into parts such as cylinder body, head, heat exchange component, hydrogen supply pipe, etc. for preparation and assembly. This step helps to reduce the difficulty of manufacturing, improve production efficiency, and facilitate subsequent maintenance and replacement.

[0059] i.Performance consistency test

[0060] The inner surface of the hydrogen storage tank is pickled to remove dirt and oxides on the surface. Then, air pressure and water pressure tests are carried out to ensure that the sealing performance and pressure bearing capacity of the hydrogen storage tank meet the design requirements. Through these tests, the consistency of the performance of the hydrogen storage tank can be ensured, laying the foundation for subsequent mass production and application.

[0061] j. Comprehensive hydrogen absorption and desorption performance test

[0062] The prepared hydrogen storage tanks are tested for performance using the comprehensive hydrogen absorption and desorption performance test equipment. The test contents include constant temperature hydrogen absorption flow-capacity test, constant temperature hydrogen desorption flow-capacity test, constant flow hydrogen desorption capacity test, constant pressure hydrogen desorption capacity test, hydrogen absorption and desorption process tank temperature distribution test, and hydrogen absorption and desorption cycle process stress and strain distribution test. Through these tests, the hydrogen storage performance, heat and mass transfer performance, and safety and reliability of the hydrogen storage tank can be fully evaluated.

[0063] Through the above implementation steps, the present invention successfully prepares a stable and high-performance solid-state hydrogen storage tank. The hydrogen storage tank not only has excellent hydrogen storage performance and heat and mass transfer performance, but also can operate safely under high temperature and high pressure environment, providing strong support for the storage and application of hydrogen energy.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A solid-state hydrogen storage tank, characterized in that: The invention comprises a tank body and a core heat exchanger arranged in the tank body; the core heat exchanger is arranged inside the tank body and is composed of a plurality of H-shaped extended surface finned tubes, the H-shaped extended surface finned tubes comprising a heat exchange tube and a plurality of heat dissipation fins arranged on the heat exchange tube, the gaps between the fins are used as spaces for placing hydrogen storage materials, and are arranged in a sequential manner; A plurality of panels of H-shaped extended surface finned tubes are stacked up and down and fixed by tube clamps. The plurality of panels are connected as a whole and fixed on a bracket on the upper part of the tank body.

2. A solid-state hydrogen storage tank according to claim 1, characterized in that: The tank body is a vertical installation structure, including a cylinder, an upper end cover and a lower end cover respectively arranged above and below the cylinder, and supporting legs arranged outside the cylinder.

3. A solid-state hydrogen storage tank according to claim 2, characterized in that: A hydrogen storage material inlet is opened at the center of the upper end cover, and a hydrogen storage material outlet is opened at the center of the lower end cover.

4. A solid-state hydrogen storage tank according to claim 2, characterized in that: Heat transfer oil inlet and outlet pipes are also provided in the cylinder, and the inlet and outlet of each layer of H-shaped extended surface finned tubes are connected in parallel to the heat transfer oil inlet and outlet pipes to form multiple heat exchange pipelines; The inlet and outlet of the heat transfer oil inlet and outlet pipes pass through the tank head, and a metal compensator is arranged at the connection to ensure the free expansion of the core heat exchanger and the heat transfer oil inlet and outlet pipes.

5. A solid-state hydrogen storage tank according to claim 1, characterized in that: There are also multiple interfaces on the tank body, including hydrogen inlet and outlet, vacuum pump interface, pressure gauge interface and thermometer interface.

6. A solid-state hydrogen storage tank according to claim 1, characterized in that: The tank body and pipeline are covered with aluminum silicate insulation layer, and the outer protective plate is made of aluminum skin.

7. A solid-state hydrogen storage tank according to claim 1, characterized in that: The design temperature of the hydrogen storage tank is 400℃, the design pressure is 5MPa on the shell side and 1.6MPa on the tube side, the tank volume is 80L, the volume of the hydrogen storage material is 53L, the filling rate is 60%, the weight of the hydrogen storage material is 40kg, and the hydrogen absorption capacity is 2kg.

8. A method for manufacturing a solid-state hydrogen storage tank, applicable to a solid-state hydrogen storage tank as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: a. Construct a three-dimensional model structure of the hydrogen storage tank, use finite element analysis software to perform meshing and working condition simulation analysis, study the stress distribution of the hydrogen storage tank, and perform structural strength verification and failure analysis; b. According to the hydrogen absorption and desorption temperature and pressure of the hydrogen storage material, combined with the performance of the tank material, the stress field and temperature field of the tank are analyzed to complete the safety design of the tank under high temperature and high pressure environment; c. Based on the hydrogen absorption and desorption rate and heat change of the hydrogen storage material, a multi-parameter coupling mathematical model is established using finite element simulation technology to optimize the diameter and layout of the heat exchange medium pipeline and increase heat exchange fins to improve the uniformity of heat transfer in the hydrogen storage tank; d. Select materials with excellent hydrogen embrittlement resistance and high mechanical strength as the tank material, and conduct performance evaluation and test verification of the parent material and hydrogen storage tank; e. Carry out research on high-reliability tank welding packaging technology, and ensure reliable sealing of weld quality through welding structure design, welding process assessment and non-destructive testing technology; f. Process the prototype of hydrogen storage tank, load hydrogen storage materials to conduct hydrogen charging and decharging tests, monitor the temperature gradient and stress-strain gradient during the hydrogen storage tank charging and decharging process, and evaluate and improve the uniformity of the temperature field and stress field of the hydrogen storage tank; g. According to the calculation results of heat balance, material balance, stress and fatigue of hydrogen storage tank, improve the structure of hydrogen storage tank, disassemble it into sub-components for preparation and assembly; h. Carry out acid washing, air pressure and water pressure tests on the inner surface of the hydrogen storage tank to ensure the consistency of the performance of the hydrogen storage tank; i. Use comprehensive hydrogen absorption and desorption performance testing equipment for hydrogen storage tanks to conduct performance tests, including constant temperature hydrogen absorption flow-capacity test, constant temperature hydrogen desorption flow-capacity test, constant flow hydrogen desorption capacity test, constant pressure hydrogen desorption capacity test, hydrogen absorption and desorption process tank temperature distribution test and hydrogen absorption and desorption cycle process stress and strain distribution test.

9. The method for manufacturing a solid-state hydrogen storage tank according to claim 8, characterized in that: The manufacturing materials of the hydrogen storage tank include 316L stainless steel as the tank body material and heat transfer medium tube bundle material, and copper as the material of the heat exchange fins.

10. The method for manufacturing a solid-state hydrogen storage tank according to claim 8, characterized in that: The performance testing equipment of the hydrogen storage tank can test the hydrogen storage capacity, hydrogen absorption pressure, hydrogen desorption temperature, time required to release the theoretical hydrogen storage capacity and hydrogen desorption purity of the hydrogen storage tank, and measure the temperature and stress-strain parameters of the hydrogen storage tank during the hydrogen absorption and desorption process in real time.

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