Self-assembled solid-state hydrogen storage heat-conducting structure and manufacturing method thereof

Abstract

This application discloses a self-assembled solid-state hydrogen storage thermally conductive structure and its manufacturing method, including a hydrogen storage bottle; a conduit is inserted and disposed at the center of the hydrogen storage bottle; multiple umbrella-shaped self-assembled shape memory units are installed at intervals on the conduit; each self-assembled shape memory unit includes a skeleton, a thin film, and a core hole; the core hole is disposed at the center of the skeleton, and its size matches the conduit; the thin film covers the spaces between the skeletons; this application achieves layered filling of hydrogen storage alloy powder through self-assembled shape memory units, which enables precise control and expansion of the powder loading in a local area, thereby improving the problem of unevenness of the powder bed after repeated hydrogen absorption and desorption; it can also realize a thermally conductive structure inside the hydrogen storage bottle, with the conduit carrying in or out the heat generated by the hydrogen storage alloy during hydrogen absorption or desorption through a thermally conductive medium, and each layer of open self-assembled shape memory unit is made of aluminum foil, which can enhance the radial thermal conductivity of the powder bed and achieve uniform heat conduction in the hydrogen storage bottle.

Description

Technical Field

[0001] This invention relates to the technical field of hydrogen storage equipment, specifically to a self-assembled solid-state hydrogen storage thermal conductive structure and its manufacturing method. Background Technology

[0002] The narrow-neck hydrogen storage cylinders in existing solid-state hydrogen storage devices are subject to significant limitations in the design of their internal heat conduction structure due to the small size of the top opening and the limitation that the filling material (hydrogen storage alloy powder) can only be supplied from the top. Furthermore, during the use of solid-state narrow-neck hydrogen storage cylinders, the hydrogen storage alloy powder is prone to secondary pulverization, expansion, and sedimentation as it repeatedly absorbs and releases hydrogen. This can lead to problems such as fine powder clogging the pores, cylinder deformation and cracking, affecting the performance of the narrow-neck hydrogen storage cylinder and even causing safety issues.

[0003] To address this issue, existing technologies typically involve adding a certain proportion of expanded graphite to the hydrogen storage alloy powder to mitigate the expansion problem caused by hydrogen absorption and desorption. Adding graphite can also improve the thermal conductivity of the powder inside the bottle to some extent. In addition, the problem of powder clogging the pores can be solved by adding a straight gas guide tube into the bottle. However, none of the above methods can solve the problems of the thermal conductivity structure of the narrow-mouth hydrogen storage bottle and the unevenness of the powder.

[0004] Based on the aforementioned existing problems, after thorough comparison and demonstration, our company proposed corresponding equipment technical modifications and developed a self-assembly solid hydrogen storage and heat conduction structure and its manufacturing method. Summary of the Invention

[0005] The purpose of this invention is to provide a self-assembled solid hydrogen storage thermal conductive structure and manufacturing method to solve the problems of thermal conductive structure and powder inhomogeneity in narrow-mouth hydrogen storage bottles.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0007] A self-assembled solid-state hydrogen storage and thermally conductive structure, comprising a narrow-mouth hydrogen storage bottle;

[0008] A conduit is inserted into the center of the narrow-mouth hydrogen storage cylinder;

[0009] Multiple umbrella-shaped self-assembly shape memory units are spaced apart on the duct.

[0010] The self-assembly shape memory unit includes a skeleton, a thin film, and a core hole;

[0011] The core hole is located at the center of the skeleton, and its size is matched with the conduit.

[0012] The thin film is covered between the skeletons.

[0013] In a preferred embodiment, the conduit is a single-tube, double-tube, or multi-tube structure that combines the functions of heat-conducting medium circulation and gas conduction.

[0014] In a preferred embodiment, the skeleton is made of shape memory alloy wire.

[0015] In a preferred embodiment, the film is aluminum foil.

[0016] In a preferred embodiment, the self-assembling shape memory unit includes a collapsed state and an expanded state.

[0017] In a preferred embodiment, the self-assembled shape memory unit has a circular shape in its unfolded state, which matches the inner diameter of the narrow-mouth hydrogen storage bottle.

[0018] In addition, this application also proposes a method for fabricating a self-assembled solid-state hydrogen storage and thermally conductive structure, comprising the following steps.

[0019] S1, Insert a tube into the center of the narrow-mouth hydrogen storage cylinder;

[0020] S2, Fill a certain amount of hydrogen storage alloy powder into the narrow-mouth hydrogen storage bottle and compact it;

[0021] S3, a self-assembly shape memory unit is inserted through the conduit. Its structure is an "umbrella" shape. The size of the core hole matches the conduit. The shape memory alloy wire is the skeleton. Aluminum foil is covered between the skeletons. When inserted from the top, the self-assembly shape memory unit is in a folded state.

[0022] S4, heat the self-assembled shape memory unit to the transition point to make it unfold into a circular shape, covering the hydrogen storage alloy powder filled in the previous layer;

[0023] S5. Repeat steps S2-S4 until powder filling is complete.

[0024] Due to the application of the above technical solution, the beneficial effects of this application compared with the prior art are as follows:

[0025] This application provides a self-assembled solid-state hydrogen storage heat-conducting structure and its manufacturing method. A conduit is inserted at the center of a narrow-mouth hydrogen storage bottle, and multiple umbrella-shaped self-assembled shape memory units are spaced apart on the conduit. The shape memory effect of these units allows them to fold and open. The application also provides a manufacturing method that enables layered loading of hydrogen storage alloy powder. Layered loading allows for precise control of the powder loading and expansion within a local area, improving the unevenness of the powder bed after repeated hydrogen absorption and desorption. It also enables a heat-conducting structure within the narrow-mouth hydrogen storage bottle. The conduit carries in or out the heat generated by the hydrogen storage alloy during hydrogen absorption or desorption through a heat-conducting medium. Each open layer of the self-assembled shape memory unit is made of aluminum foil, enhancing the radial heat conduction of the powder bed and achieving uniform heat conduction in the narrow-mouth hydrogen storage bottle. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Appendix Figure 1 This is a schematic diagram of the self-assembled solid-state hydrogen storage and thermal conductivity structure of the present invention;

[0028] Appendix Figure 2 This is a schematic diagram of the structure of the self-assembly shape memory unit of the present invention;

[0029] Appendix Figure 3 This is a schematic diagram illustrating the fabrication and assembly of the self-assembled solid hydrogen storage and thermal conductivity structure of the present invention.

[0030] The components include: 1. Narrow-mouth hydrogen storage cylinder; 2. Conduit; 3. Self-assembled shape memory unit; 4. Framework; 5. Thin film; 6. Core hole. Detailed Implementation

[0031] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0032] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0033] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing the invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0034] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in certain situations to indicate a dependency or connection. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0035] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0036] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0037] Example 1

[0038] Please see Figure 1 and Figure 2 This application provides a self-assembled solid-state hydrogen storage and thermal conductivity structure, including a narrow-mouth hydrogen storage bottle 1;

[0039] A conduit 2 is inserted into the center of the narrow-mouth hydrogen storage bottle 1; the conduit 2 is a single-tube, double-tube, or multi-tube structure that has both heat-conducting medium circulation and gas-conducting functions.

[0040] Multiple umbrella-shaped self-assembly shape memory units 3 are installed at intervals on the conduit 2;

[0041] The self-assembly shape memory unit 3 includes a skeleton 4, a thin film 5, and a core hole 6;

[0042] The core hole 6 is located at the center of the skeleton 4, and its size is matched with the conduit 2;

[0043] The skeleton 4 is made of shape memory alloy wire;

[0044] The frame 4 is covered with the film 5, which is aluminum foil.

[0045] The self-assembly shape memory unit 3 includes a collapsed state and an unfolded state; the unfolded shape of the self-assembly shape memory unit 3 is circular, matching the inner diameter of the narrow-mouth hydrogen storage bottle 1.

[0046] Example 2

[0047] See Figure 3 In addition, this application also proposes a method for fabricating a self-assembled solid-state hydrogen storage and thermal conductivity structure, comprising the following steps:

[0048] S1. First, insert a conduit 2 into the center of the narrow-mouth hydrogen storage bottle 1. This conduit 2 can be a single tube, double tube or multi-tube structure, and has the functions of heat transfer medium circulation and gas conduction.

[0049] S2, fill a certain amount of hydrogen storage alloy powder into the narrow-mouth hydrogen storage bottle 1 and compact it;

[0050] S3, a self-assembled shape memory unit 3 is inserted from the conduit 2. Its structure is an "umbrella" shape. The size of the core hole 6 matches the conduit 2. The shape memory alloy wire is the skeleton 4. Aluminum foil is covered between the skeletons 4. When inserted from the top, the self-assembled shape memory unit 3 is in a retracted state.

[0051] S4, heat the self-assembled shape memory unit 3 to the transition point to make it unfold into a circular shape, covering the hydrogen storage alloy powder filled in the previous layer;

[0052] S5. Repeat steps S2-S4 until powder filling is complete.

[0053] This application discloses a self-assembled solid-state hydrogen storage thermal conductive structure. A conduit 2 is inserted at the center of a narrow-mouth hydrogen storage bottle 1, and multiple umbrella-shaped self-assembled shape memory units 3 are spaced apart on the conduit 2. These self-assembled shape memory units 3 utilize shape memory effect to fold and open, enabling layered loading of hydrogen storage alloy powder. Layered loading allows for precise control of powder loading and expansion within a local area, improving the unevenness of the powder bed after repeated hydrogen absorption and desorption. It also establishes a thermal conductive structure within the narrow-mouth hydrogen storage bottle 1. The conduit 2 carries in or out the heat generated by the hydrogen storage alloy during hydrogen absorption or desorption through a thermally conductive medium. Each open layer of the self-assembled shape memory unit 3 is made of aluminum foil, enhancing the radial thermal conductivity of the powder bed and achieving uniform heat conduction in the narrow-mouth hydrogen storage bottle 1.

[0054] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A self-assembled solid-state hydrogen storage heat conducting structure, characterized in that: Including narrow-mouth hydrogen storage cylinders; A conduit is inserted into the center of the narrow-mouth hydrogen storage cylinder; Multiple umbrella-shaped self-assembly shape memory units are spaced apart on the duct. The self-assembly shape memory unit includes a skeleton, a thin film, and a core hole; The core hole is located at the center of the skeleton, and its size is matched with the conduit. The thin film is covered between the skeletons.

2. A self-assembled solid state hydrogen storage heat conducting structure as claimed in claim 1, wherein: The conduit is a single-tube, double-tube, or multi-tube structure that combines the functions of heat transfer medium circulation and gas conduction.

3. A self-assembled solid state hydrogen storage heat conducting structure as claimed in claim 1, wherein: The skeleton is made of shape memory alloy wire.

4. A self-assembled solid state hydrogen storage heat conducting structure as claimed in claim 1, wherein: The film is aluminum foil.

5. A self-assembled solid state hydrogen storage heat conducting structure as claimed in claim 1, wherein: The self-assembly shape memory unit includes a collapsed state and an expanded state.

6. A self-assembled solid hydrogen storage thermally conductive structure according to claim 5, wherein: The self-assembled shape memory unit has a circular shape in its unfolded state, which matches the inner diameter of the narrow-mouth hydrogen storage bottle.

7. A method for making a self-assembled solid-state hydrogen storage thermally conductive structure, the method comprising: Includes the following steps, ​ S1, Insert a tube into the center of the narrow-mouth hydrogen storage cylinder; S2, Fill a certain amount of hydrogen storage alloy powder into the narrow-mouth hydrogen storage bottle and compact it; S3, a self-assembly shape memory unit is inserted through the conduit. Its structure is an "umbrella" shape. The size of the core hole matches the conduit. The shape memory alloy wire is the skeleton. Aluminum foil is covered between the skeletons. When inserted from the top, the self-assembly shape memory unit is in a folded state. S4, heat the self-assembled shape memory unit to the transition point to make it unfold into a circular shape, covering the hydrogen storage alloy powder filled in the previous layer; S5. Repeat steps S2-S4 until powder filling is complete.

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