Triple periodic minimal curved surface-based hydrogen storage device suitable for hydrogen storage alloy material

Abstract

The invention provides a hydrogen storage device suitable for a hydrogen storage alloy material and based on a triple periodic minimal curved surface, and belongs to the technical field of hydrogen storage, and the hydrogen storage device comprises a hydrogen storage bottle body used for storing hydrogen; the bottle body end socket is positioned at the top of the hydrogen storage bottle body and is used for controlling hydrogen release; the bottle body base is positioned at the bottom of the hydrogen storage bottle body and is used for sealing the hydrogen storage bottle body; and the filtering gasket is positioned at the joint of the bottle body end socket and the hydrogen storage bottle body and is used for preventing the metal powder from flowing backwards. The problems that the hydrogen charging and discharging response time is long while the heat transfer efficiency of the solid hydrogen storage device is ensured, and metal powder escapes to pollute an upstream pipeline after solid hydrogen storage metal is broken are solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydrogen storage, and in particular relates to a hydrogen storage device based on a triple periodic minimal surface suitable for hydrogen storage alloy materials. Background Art

[0002] As energy crisis and environmental pollution become increasingly serious, hydrogen energy as a clean and efficient energy source has received widespread attention. However, the storage and transportation of hydrogen is one of the key issues restricting the development of hydrogen energy. At present, the commonly used hydrogen storage methods include high-pressure gaseous hydrogen storage, low-temperature liquid hydrogen storage and solid-state hydrogen storage. Among them, solid-state hydrogen storage has the advantages of high hydrogen storage density, good safety and low hydrogen storage pressure, and is one of the main development directions of hydrogen storage and transportation in the future.

[0003] Solid alloy hydrogen storage materials mainly include magnesium, rare earth, titanium, zirconium, and vanadium. Among them, titanium hydrogen storage alloys have the advantages of large hydrogen absorption capacity, low hydrogen absorption and desorption temperature, low hydrogen release pressure, and long cycle life, and have broad application prospects. At the same time, the hydrogen absorption and desorption rate of hydrogen storage materials is highly correlated with temperature. In the process of hydrogen absorption and desorption, it is urgent to exchange external cold and heat with the metal in the bottle. When storing titanium hydrogen storage alloy materials, current hydrogen storage devices have low heat exchange efficiency and long heat exchange time, resulting in slow response of hydrogen storage bottles. In addition, the material is difficult to gather after expansion, and hydrogen storage metal powder is prone to backflow. Therefore, this paper proposes a hydrogen storage bottle based on three-periodic minimal surfaces suitable for hydrogen storage alloy materials.

[0004] At present, there are many designs related to solid-state hydrogen storage tanks, but there is little consideration of the response time of hydrogen charging and dehydrogenation, and the problem of partial metal powder escaping after the metal hydride expands, contracts, and breaks into powder during the hydrogen absorption and dehydrogenation process. Or only the heat transfer efficiency is considered, and the metal powder escape phenomenon caused by the deformation and crushing of the internal hydrogen storage metal material is ignored. For example, CN 118499683A discloses a magnesium-based solid-state hydrogen storage tank with a built-in heat transfer structure. By building a heat transfer structure inside the hydrogen storage bottle, the heat transfer efficiency of the hydrogen storage tank is improved and the stress generated by the expansion of the metal hydride is buffered. However, its structural shape has no blocking effect on the powdered metal material, and the solid-state hydrogen storage metal material is prone to escape into the hydrogen discharge pipeline with the hydrogen gas, thereby polluting the pipeline.

[0005] With the repeated use of solid-state hydrogen storage bottles, the metal hydrogen storage material continues to expand and contract, and eventually breaks into metal powder. Commonly used solid-state hydrogen storage bottles often focus on improving heat transfer efficiency, ignoring the problem that after the metal powder breaks, it escapes into the hydrogen charging and discharging pipelines during the hydrogen charging and discharging process, polluting the hydrogen charging and discharging pipelines and affecting the recycling of solid-state hydrogen storage bottles. Therefore, there is an urgent need for a hydrogen storage device that can both improve heat transfer efficiency and response time and prevent metal powder from escaping. Summary of the invention

[0006] The present invention provides a hydrogen storage device based on a triple periodic minimal surface suitable for hydrogen storage alloy materials, which aims to solve the problems of long response time for hydrogen charging and discharging while ensuring the heat transfer efficiency of the solid-state hydrogen storage device, and the escape of metal powder after the solid-state hydrogen storage metal is crushed, which pollutes the upstream pipeline.

[0007] The embodiment of the present invention provides a hydrogen storage device based on a triple periodic minimal surface suitable for hydrogen storage alloy materials, comprising:

[0008] A hydrogen storage bottle body, wherein the hydrogen storage bottle body is used to store hydrogen;

[0009] A bottle body cover, which is located at the top of the hydrogen storage bottle and is used to control the release of hydrogen;

[0010] A bottle base, which is located at the bottom of the hydrogen storage bottle and is used to seal the hydrogen storage bottle;

[0011] A filter gasket, which is located at the connection between the bottle head and the hydrogen storage bottle body to prevent the backflow of metal powder;

[0012] A three-periodic minimal curved surface structure is filled in the hydrogen storage bottle, and a hydrogen storage material is arranged inside the three-periodic minimal curved surface structure.

[0013] Furthermore, the bottle base is connected to the bottom of the hydrogen storage bottle body by welding.

[0014] Furthermore, the three-periodic minimal surface structure is formed by an additive manufacturing method.

[0015] Furthermore, the hydrogen storage material is filled in the gaps of the three-periodic minimal surface structure, leaving a certain margin.

[0016] Furthermore, the three-periodic minimal surface structure is composed of a plurality of mutually interconnected three-periodic minimal surface unit cells, and the three-periodic minimal surface structure is composed of interconnected surfaces.

[0017] Furthermore, the three-periodic minimal surface structures are respectively D surface, G surface, P surface, N surface, S surface, I-WP surface, F-RD surface, and I2-Y surface.

[0018] Furthermore, the hydrogen storage bottle body and the three-period minimal surface structure are made of stainless steel, aluminum alloy, or titanium alloy.

[0019] The beneficial effects of the present invention are:

[0020] 1. The present invention combines a triple periodic minimal surface structure with a hydrogen storage bottle body, increases the contact area between the hydrogen storage material and hydrogen, and increases the contact area between hydrogen and the hydrogen storage material, thereby improving the hydrogen storage efficiency; by arranging a triple periodic minimal surface structure inside the hydrogen storage bottle, the heat exchange efficiency between the inside of the bottle body and the outside is greatly improved, thereby shortening the response time of hydrogen absorption and desorption of the hydrogen storage material. Compared with the original hydrogen storage bottle, the heat exchange is more uniform, and the hydrogen absorption and release is more rapid, thereby avoiding the phenomenon of unstable hydrogen absorption and desorption efficiency caused by local overheating and overcooling caused by uneven heat exchange. The present invention makes full use of the large specific surface area, high energy absorption and unique layered deformation characteristics of the three-periodic minimal surface, improves the heat exchange efficiency between the hydrogen storage bottle and the cold and heat source, increases the contact area between the hydrogen storage material and hydrogen, and improves the hydrogen charging and desorption efficiency. At the same time, through the unique layered deformation structure, it can prevent the hydrogen storage alloy from entering the hydrogen charging and desorption pipeline during the hydrogen charging and desorption process after being pulverized.

[0021] 2. By setting up a triple periodic minimal surface structure in the hydrogen storage bottle, more hydrogen storage materials can be stored in a limited space, while reserving some expansion space to prevent the hydrogen storage material from expanding during the hydrogen absorption and desorption process and causing damage to the bottle body; the triple periodic minimal surface is a lattice surface structure, which forms an interconnected lattice inside the hydrogen storage bottle, and has a certain blocking effect on the hydrogen storage material after expansion and crushing, preventing the hydrogen storage material powder from flowing back during the hydrogen absorption and desorption process and entering the hydrogen absorption and desorption pipeline with the hydrogen. At the same time, the triple periodic minimal surface structure has a higher specific strength and specific stiffness, and can withstand large external forces without excessive deformation or damage. The existence of pores between the lattices enables the material to absorb energy through compression and deformation of the pores when it is impacted by external forces, thereby playing a role in buffering and shock absorption, and improving the safety of the hydrogen storage device.

[0022] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0024] Figure 1 This is a schematic diagram of the overall structure of a hydrogen storage bottle according to an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of a D-type three-periodic minimal surface filled hydrogen storage bottle according to an embodiment of the present invention;

[0026] Figure 3This is a schematic diagram of the central local structure of the hydrogen storage bottle body according to an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the structure of a G-type three-periodic minimal surface filled hydrogen storage bottle according to an embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the structure of an I-WP type three-periodic minimal surface filled hydrogen storage bottle according to an embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of the structure of an N-type three-periodic minimal surface filled hydrogen storage bottle according to an embodiment of the present invention;

[0030] Figure numerals: 1. hydrogen storage bottle; 2. bottle head; 3. bottle base; 4. filter gasket; 5. three-period minimal surface structure; 6. hydrogen storage material. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the technical solution of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described in conjunction with the drawings of specific embodiments of the present invention. The same figure marks in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described 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.

[0032] Reference Figure 1-6 The embodiment of the present invention provides a hydrogen storage device based on a triple periodic minimal surface suitable for hydrogen storage alloy materials, comprising:

[0033] A hydrogen storage bottle 1, which is used to store hydrogen;

[0034] The bottle body cover 2 is located at the top of the hydrogen storage bottle body 1 and is used to control the release of hydrogen;

[0035] The bottle base 3 is located at the bottom of the hydrogen storage bottle 1 and is used to seal the hydrogen storage bottle 1;

[0036] A filter gasket 4 is located at the connection between the bottle head 2 and the hydrogen storage bottle 1 to prevent the metal powder from flowing back;

[0037] A three-periodic minimal surface structure 5 is filled inside the hydrogen storage bottle 1, and a hydrogen storage material 6 is arranged inside the three-periodic minimal surface structure 5; when absorbing hydrogen, hydrogen enters the hydrogen storage bottle 1 through the bottle head 2, and the hydrogen storage material 6 needs to absorb cold energy from the outside to maintain the hydrogen absorption state. The external cold energy passes through the hydrogen storage bottle 1 and the three-periodic minimal surface structure 5 and is quickly transferred to the hydrogen storage material 6, and begins to absorb and store a large amount of hydrogen; when releasing hydrogen, the bottle head 2 is opened, and the hydrogen storage material 6 needs to absorb heat from the outside to maintain the hydrogen release state. The heat conduction method is consistent with the hydrogen absorption condition, and then the hydrogen is released.

[0038] The bottle base 3 is connected to the bottom of the hydrogen storage bottle 1 by welding, and this is carried out after the three-period minimal curved surface structure 5 is installed in the hydrogen storage bottle 1 .

[0039] The three-periodic minimal surface structure 5 is formed by an additive manufacturing method. The three-periodic minimal surface structure 5 can adjust the gap, porosity, etc. to adapt to the structure, capacity, and hydrogen storage requirements of the hydrogen storage bottle. After the three-periodic minimal surface structure 5 is prepared by the additive manufacturing method, it is filled into the hydrogen storage bottle.

[0040] The hydrogen storage material 6 is filled in the gaps of the three-periodic minimal surface structure 5 , and a certain margin is left to prevent the hydrogen storage material 6 from expanding during the process of absorbing and releasing hydrogen, thereby preventing the hydrogen storage bottle 1 from being damaged.

[0041] The three-periodic minimal surface structure 5 is composed of a plurality of mutually interconnected three-periodic minimal surface unit cells, and the three-periodic minimal surface structure 5 is composed of interconnected surfaces.

[0042] The three-periodic minimal surface structures 5 are D surface, G surface, P surface, N surface, S surface, I-WP surface, F-RD surface, and I2-Y surface;

[0043] The surface formulas of D, G, P, I-WP, F-RD, and I2-Y are as follows:

[0044] D surface formula:

[0045]

[0046] G surface formula

[0047]

[0048] P surface formula

[0049]

[0050] I-WP Surface Formula

[0051]

[0052] I2-Y surface formula

[0053]

[0054] N surface formula

[0055]

[0056] S-surface formula

[0057]

[0058] Among them, x, y, z are the spatial coordinates of the surface point, and l is the side length of the three-periodic minimal surface unit cell.

[0059] The hydrogen storage bottle body 1 and the three-period minimal surface structure 5 are made of stainless steel, aluminum alloy, and titanium alloy.

[0060] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A hydrogen storage device based on a triple periodic minimal surface suitable for hydrogen storage alloy materials, characterized in that: include: A hydrogen storage bottle (1), wherein the hydrogen storage bottle (1) is used to store hydrogen; A bottle body seal head (2), the bottle body seal head (2) is located at the top of the hydrogen storage bottle body (1) and is used to control the release of hydrogen; A bottle base (3), the bottle base (3) being located at the bottom of the hydrogen storage bottle (1) and used to seal the hydrogen storage bottle (1); A filter gasket (4), the filter gasket (4) being located at the connection between the bottle body cover (2) and the hydrogen storage bottle body (1) and being used to prevent the metal powder from flowing back; A three-periodic minimal curved surface structure (5) is filled in the hydrogen storage bottle (1), and a hydrogen storage material (6) is arranged inside the three-periodic minimal curved surface structure (5).

2. A hydrogen storage device based on a triple periodic minimal surface suitable for hydrogen storage alloy materials according to claim 1, characterized in that: The bottle body base (3) is connected to the bottom of the hydrogen storage bottle body (1) by welding.

3. A hydrogen storage device based on a triple periodic minimal surface suitable for hydrogen storage alloy materials according to claim 1, characterized in that: The three-periodic minimal surface structure (5) is formed by an additive manufacturing method.

4. A hydrogen storage device based on a triple periodic minimal surface suitable for hydrogen storage alloy materials according to claim 1, characterized in that: The hydrogen storage material (6) is filled in the gaps of the three-periodic minimal surface structure (5), with a certain margin left.

5. A hydrogen storage device based on a triple periodic minimal surface suitable for hydrogen storage alloy materials according to claim 1, characterized in that: The three-periodic minimal surface structure (5) is composed of a plurality of mutually interconnected three-periodic minimal surface unit cells, and the three-periodic minimal surface structure (5) is composed of interconnected surfaces.

6. A hydrogen storage device based on a triple periodic minimal surface suitable for hydrogen storage alloy materials according to claim 5, characterized in that: The three-periodic minimal surface structures (5) are respectively D surface, G surface, P surface, N surface, S surface, I-WP surface, F-RD surface, and I2-Y surface.

7. A hydrogen storage device based on a triple periodic minimal surface suitable for hydrogen storage alloy materials according to claim 1, characterized in that: The hydrogen storage bottle body (1) and the three-period minimal surface structure (5) are made of stainless steel, aluminum alloy, or titanium alloy.

Images