Solid hydrogen storage tank

Abstract

The utility model belongs to the technical field of gas storage, particularly relates to the technical field of using a gas absorbent in a container, and particularly relates to a solid hydrogen storage tank. According to the solid hydrogen storage tank, the hydrogen storage device is arranged in the tank body to adsorb and store hydrogen, the hydrogen exhaust device is arranged to exhaust the hydrogen desorbed by the hydrogen storage device, and meanwhile, the hydrogen exhaust device is suitable for carrying out self-adaptive pressure adjustment when the hydrogen is just desorbed from the hydrogen storage device but not exhausted; therefore, waste caused by the fact that part of hydrogen is discharged from the pressure release valve due to the fact that the pressure in the tank is too large when the hydrogen is just desorbed is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of gas storage, specifically relates to a kind of in container using gas absorbent technical field, more particularly to a kind of solid hydrogen storage tank. BACKGROUND

[0002] For fixed or mobile hydrogen storage occasions, the related technology adopts gaseous hydrogen storage or liquid hydrogen storage mode, wherein gaseous hydrogen is usually stored in the form of high-pressure cylinder, and its storage pressure is generally 35MPa and 70MPa, while the storage pressure of liquid hydrogen is higher. In order to achieve the storage pressure, gaseous hydrogen storage or liquid hydrogen storage needs to be compressed by a gas compressor. According to the existing research results, the compression process of hydrogen will bring a large amount of parasitic power loss, and this is also one of the important factors for the high cost of hydrogen storage and transportation.

[0003] Metal hydride hydrogen storage is a solid-state hydrogen storage method, and the hydrogen storage volume energy density of its material can generally reach 100kg / m -3 Therefore, this hydrogen storage method has the advantages of high volume energy density, low storage pressure, high safety, etc. The chemical reaction process of metal hydride absorbing hydrogen is exothermic, and the process of desorbing hydrogen is endothermic. Therefore, the use of phase change heat storage technology can effectively reduce the heat dissipation brought by the metal hydride hydrogen storage process, and the phase change heat storage material can store and reuse heat, realizing the heat management of the metal hydride hydrogen storage process.

[0004] In order to ensure the safety of the hydrogen storage tank, a pressure relief valve is arranged on the hydrogen storage tank in the related technology, so that the hydrogen gas desorbed at ordinary times is discharged, but this method causes part of the desorbed hydrogen to be leaked and discharged through the pressure relief valve when the metal hydride starts to desorb hydrogen but has not been discharged, which will cause waste of hydrogen leakage.

[0005] Therefore, it is urgent to provide a solid-state hydrogen storage tank to solve the technical problem of hydrogen leakage and waste caused by pressure relief when hydrogen is desorbed in the related technology.

[0006] It should be noted that the above information disclosed in the background section of the present application is only used to understand the background of the present application, and therefore, the above description is not considered to constitute prior art information. UTILITY MODEL CONTENT

[0007] The present disclosure at least provides a solid-state hydrogen storage tank, comprising: a tank body and a hydrogen storage device arranged inside the tank body; and a hydrogen discharge device arranged at the top of the tank body and configured to increase the volume inside the tank body when moving upward when the hydrogen storage device desorbs hydrogen, so as to reduce the pressure inside the tank body.

[0008] In an alternative embodiment, the hydrogen storage device comprises: a hydrogen storage assembly and a heat exchange assembly; wherein the hydrogen storage assembly is vertically inserted into the tank body; and the heat exchange assembly is annularly arranged around the hydrogen storage assembly to enclose a heat exchange chamber; wherein the heat exchange assembly heats the heat exchange chamber, thereby increasing the temperature of the hydrogen storage assembly to cause hydrogen to be desorbed from the hydrogen storage assembly.

[0009] In an alternative embodiment, the hydrogen storage assembly comprises at least two alloy hydrogen storage sheets; and a gap is left between the two alloy hydrogen storage sheets for the desorbed hydrogen to flow.

[0010] In an alternative embodiment, the tank body is provided with an exhaust hole at the top; and the exhaust hole extends into the hydrogen storage assembly to form a gap.

[0011] In an alternative embodiment, the hydrogen exhaust device comprises: a housing and a pressure regulating mechanism; the housing is arranged on the top of the tank body to cover the exhaust hole; and the pressure regulating mechanism is arranged in the housing and moves up and down to change the volume of the housing, thereby changing the volume of the tank body.

[0012] In an alternative embodiment, the pressure regulating mechanism comprises: a pressure regulating piston; the pressure regulating piston is slidably arranged in the housing; wherein the pressure regulating piston is adapted to move backward when the pressure in the tank body increases, thereby increasing the volume of the housing.

[0013] In an alternative embodiment, the pressure regulating mechanism further comprises: a pressure relief flow channel formed on the side wall of the housing; and a pressure relief assembly arranged in the pressure relief flow channel; wherein the pressure relief assembly is adapted to be in an open state when the pressure regulating piston is in an initial position, thereby causing part of the hydrogen overflow in the tank body to flow into the pressure regulating piston from the pressure relief flow channel.

[0014] In an alternative embodiment, the pressure relief assembly comprises: a pressure relief plate and a pressure relief spring; the width of the pressure relief plate is less than the width of the pressure relief flow channel; and the pressure relief plate is adapted to be attached to the side wall of one end of the pressure relief flow channel under the elasticity of the pressure relief spring, thereby blocking the inlet and outlet of the pressure relief flow channel.

[0015] In an alternative embodiment, the pressure relief plate is further provided with a trigger protrusion; the trigger protrusion extends into the housing from the pressure relief flow channel; and the position of the trigger protrusion corresponds to the initial position of the pressure regulating piston.

[0016] In an alternative embodiment, the top of the housing is further provided with an exhaust pipe; one end of the exhaust pipe is connected to the inside of the housing; and the other end of the exhaust pipe is further provided with a pressure relief valve.

[0017] The solid-state hydrogen storage tank has the advantages that the hydrogen storage device is arranged in the tank body to adsorb and store hydrogen, the hydrogen discharge device is arranged to discharge hydrogen desorbed from the hydrogen storage device, and the hydrogen discharge device is adapted to perform self-adaptive pressure adjustment when the hydrogen is just desorbed from the hydrogen storage device but not discharged, so that the excessive pressure in the tank caused by the hydrogen just desorbed is avoided, and the waste caused by discharging part of the hydrogen through the pressure relief valve is avoided.

[0018] Other features and advantages of the present application will be set forth in the following description of the application, and in part will become apparent to those skilled in the art upon examination of the following or can be learned from practice of the application. The objects and other advantages of the application can be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

[0019] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0021] Figure 1 The structure schematic diagram of the solid-state hydrogen storage tank provided by the embodiment of the present application is shown;

[0022] Figure 2 The internal structure schematic diagram of the solid-state hydrogen storage tank provided by the embodiment of the present application is shown;

[0023] Figure 3 The internal structure schematic diagram of the hydrogen discharge device of the solid-state hydrogen storage tank provided by the embodiment of the present application is shown;

[0024] Figure 4 The gas flow direction schematic diagram when the hydrogen discharge device provided by the embodiment of the present application is in a state is shown;

[0025] Figure 5 The gas flow direction schematic diagram when the hydrogen discharge device provided by the embodiment of the present application is in another state is shown;

[0026] In the drawings:

[0027] The tank body 1, the hydrogen storage device 2, the heat exchange chamber 20, the hydrogen storage assembly 21, the heat exchange assembly 22, the exhaust gap 23, the hydrogen discharge device 3, the exhaust hole 30, the shell 31, the pressure regulating mechanism 32, the pressure regulating piston 321, the pressure relief flow channel 322, the pressure relief plate 323, the pressure relief spring 324, the exhaust pipe 325, and the pressure relief valve 326. DETAILED DESCRIPTION

[0028] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the present application will be described below in connection with the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0029] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, in the drawings, in order to effectively describe the technical content, the thickness of the components can be exaggerated or reduced.

[0030] Some embodiments of the present application will be described in detail below in connection with the drawings. In the case of no conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0031] Referring to Figure 1 , Figure 1 A solid-state hydrogen storage tank is shown, which comprises: a tank body 1 and a hydrogen storage device 2 arranged inside the tank body 1; and a hydrogen discharge device 3 arranged at the top of the tank body 1 and configured to increase the volume inside the tank body 1 when moving upward when the hydrogen storage device 2 desorbs hydrogen, so as to reduce the pressure inside the tank body 1.

[0032] In some embodiments, the solid-state hydrogen storage tank is to store hydrogen in solid form by using hydrogen storage alloy to adsorb hydrogen at a specific temperature and pressure. When hydrogen needs to be released, hydrogen is desorbed from the alloy by heating the hydrogen storage material and released to the external device through the output port. Therefore, the adsorption and desorption of hydrogen should be carried out at the preset pressure and temperature as much as possible. For this reason, the desorption process and the discharge process are usually carried out separately, i.e. the discharge is carried out after the desorption is completed, to ensure the controllability of the pressure in the tank. For this purpose, the solid-state hydrogen storage tank is provided with a hydrogen storage device 2 in the tank body 1 to adsorb and store hydrogen, and a hydrogen discharge device 3 is provided to discharge the hydrogen desorbed from the hydrogen storage device 2. At the same time, the hydrogen discharge device 3 is adapted to automatically adjust the pressure when the hydrogen is just desorbed from the hydrogen storage device 2 but not discharged, so as to avoid the excessive pressure in the tank when the hydrogen is just desorbed, which may cause the waste of hydrogen discharged through the pressure relief valve.

[0033] In some embodiments, the hydrogen storage device 2 comprises a hydrogen storage assembly 21 and a heat exchange assembly 22. The hydrogen storage assembly 21 comprises at least two hydrogen storage alloy sheets, and the material of the hydrogen storage alloy sheet includes but is not limited to magnesium-based, titanium-based or vanadium-based alloy. The two hydrogen storage sheets are vertically inserted into the inside of the tank body 1, and a discharge gap 23 is left between the two hydrogen storage sheets. The heat exchange assembly 22 is annularly arranged around the periphery of the two hydrogen storage sheets to enclose a heat exchange chamber 20. When the heat exchange assembly 22 is heated, the temperature in the heat exchange chamber 20 rises, thereby increasing the temperature of the hydrogen storage assembly 21, so that hydrogen is desorbed from the hydrogen storage assembly 21 and discharged through the discharge gap 23.

[0034] As a preferred embodiment, the heat exchange assembly 22 uses semiconductor heat exchange sheets. When direct current passes through a couple of different semiconductor materials connected in series, heat can be absorbed and released at both ends of the couple, which can achieve the purpose of refrigeration. Moreover, the direct current can be generated by photovoltaic power generation of a solar power generation device, which is energy-saving and environmentally friendly.

[0035] As a preferred embodiment, the heat exchange assembly 22 can also be directly configured as an electric heating device, which uses existing heating devices to adjust the temperature in the heat exchange chamber 20.

[0036] In some embodiments, the top of the tank body 1 is provided with an exhaust hole 30 corresponding to the position of the discharge gap 23. After the hydrogen is discharged, it will flow into the shell 31 of the hydrogen discharge device 3 through the exhaust hole 30, thereby pushing the pressure adjusting mechanism 32 to move upward in the shell 31, increasing the volume of the shell 31, and further changing the overall volume of the inside of the tank body 1 to reduce the pressure in the tank body 1, thereby avoiding the discharge of hydrogen through the pressure relief valve.

[0037] In some embodiments, the pressure regulating mechanism 32 comprises a pressure regulating piston 321 slidingly arranged in the shell 31, as an optional implementation, a spring can be arranged between the pressure regulating piston 321 and the inner wall of the shell 31, the spring is compressed by the change of pressure, so that the pressure regulating piston 321 moves upward, and a pressure relief flow channel 322 is further arranged on the side wall of the shell 31, and a pressure relief assembly is arranged in the pressure relief flow channel 322.

[0038] Referring to Figure 4 When the pressure regulating piston 321 does not move, the end of the piston extrudes the trigger protrusion of the pressure relief plate 323 in the pressure relief assembly, so that the pressure relief plate 323 is in an extruded state, and the pressure relief flow channel 322 is in an open state, at this time, it corresponds to the state that the hydrogen in the tank body 1 is not adsorbed, the opening of the pressure relief flow channel 322 can provide a flow channel for a small amount of hydrogen unexpectedly desorbed from the hydrogen storage device 2 due to daily temperature changes or pressure changes, so that the hydrogen flows from the lower side of the pressure regulating piston 321 to the upper side of the pressure regulating piston 321 along the F direction, and if the amount of hydrogen unexpectedly desorbed at this time is large, it can also be directly discharged from the exhaust pipe, so as to ensure that the pressure in the tank is maintained within a safe range.

[0039] Referring to Figure 5 When the pressure regulating piston 321 moves upward, the trigger protrusion of the pressure relief plate 323 loses the limit of the end of the piston, and is ejected under the action of the pressure relief spring 324, and the pressure relief flow channel 322 is closed, at this time, it corresponds to the state that the hydrogen in the tank body 1 is desorbed, and the closing of the pressure relief flow channel 322 avoids the direct discharge of hydrogen from the pressure relief valve 356, and the hydrogen is stored in the tank body 1 under the action of the pressure regulating piston 321 along the F direction, that is, the increase of pressure is avoided, and the waste of hydrogen leakage is also avoided.

[0040] As a preferred embodiment, the width of the pressure relief plate 323 is smaller than the width of the pressure relief flow channel 322, and the pressure relief plate 323 is attached to one end of the side wall of the pressure relief flow channel under the elastic action of the pressure relief spring 324, thereby blocking the inlet and outlet of the pressure relief flow channel 322.

[0041] In some embodiments, the top of the shell 31 is further provided with an exhaust pipe 325, one end of the exhaust pipe 325 is connected with the inside of the shell 31, and the other end of the exhaust pipe 325 is further provided with a pressure relief valve 356.

[0042] In summary, the solid-state hydrogen storage tank stores hydrogen by arranging the hydrogen storage device 2 in the tank body 1, and discharges the hydrogen desorbed from the hydrogen storage device 2 by arranging the hydrogen discharge device 3, at the same time, the hydrogen discharge device 3 is adapted to adaptively adjust the pressure when the hydrogen is just desorbed from the hydrogen storage device 2 but not discharged, so as to avoid the excessive pressure in the tank when the hydrogen is just desorbed, which causes a part of the hydrogen to be discharged from the pressure relief valve 356 and wasted.

[0043] In this document, when a first component is referred to as being "on" a second component, it can be directly on the second component or intervening components can be present. In contrast, when a first component is referred to as being "directly on" a second component, there are no intervening components present. Other words used to describe the relationship between elements should be interpreted in a like fashion (e.g., "between" versus "directly between," "adjacent" versus "directly adjacent," etc.). As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0044] In this document, when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element or layer, or intervening elements or layers can be present. In contrast, when an element is referred to as being "directly on" another element or layer, there are no intervening elements or layers present. Other words used to describe the relationship between elements should be interpreted in a like fashion (e.g., "between" versus "directly between," "adjacent" versus "directly adjacent," etc.). As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0045] In this document, example embodiments of the disclosure are described in more detail with reference to the accompanying drawings. As used herein, such as the expression "at least one of," when preceding a list of two or more items, modifies the entire list of items and does not modify the individual items of the list. For example, the expression "at least one of a, b, and c" should be understood as including only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0046] The terminology used herein is for the purpose of describing particular example configurations only and is not intended to be limiting. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," and "including" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order

[0047] As used herein, the phrases “in an embodiment,” “according to an embodiment,” “in some embodiments,” and the like generally mean the particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of the present disclosure. Thus, appearances of such phrases in various places in the specification do not necessarily all refer to the same embodiment. As used herein, the terms “example,” “for example,” and the like are utilized merely for the purpose of facilitating this description. Any embodiment, aspect, or design described herein as an “example” or “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments, aspects, or designs. Rather, the term “example” is intended to indicate a non-limiting example, and that other embodiments, aspects, or designs are possible.

[0048] In the description of the embodiments of the present application, unless specifically defined and limited otherwise, the terms “mounting”, “connected with”, “connection” should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, or can be internal communication of two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0049] In the description of the present application, it should be explained that the terms “center”, “upper”, “lower”, “left”, “right”, “vertical”, “horizontal”, “inner”, “outer” and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, terms such as “first”, “second” and other numerical terms are used herein without implying a sequence or order unless the context clearly indicates otherwise. Therefore, the first element, component, region, layer or section discussed above can be referred to as the second element, component, region, layer or section without departing from the teachings of the example embodiments.

[0050] Spatially relative terms, such as "inner," "outer," "beneath," "below," "lower," "above," "upper," and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. Spatially relative terms can be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the example term "below" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0051] In the above discussion, unless otherwise stated, the terms "about," "approximately," "substantially" and the like mean a variation of + / - 10% when used to describe a numerical value.

[0052] With the above ideal embodiments according to the present application as the inspiration, through the above description, relevant personnel can certainly make various changes and modifications without deviating from the technical thought of the present application. The technical scope of the present application is not limited to the content in the specification, and must be determined according to the scope of claims.

Claims

1. A solid state hydrogen storage tank, characterized by, The solid-state hydrogen storage tank comprises: a tank body (1) and a hydrogen storage device (2) arranged inside the tank body (1); and a hydrogen discharge device (3) arranged on the top of the tank body (1) and configured to increase the volume inside the tank body (1) when moving upward when the hydrogen storage device (2) desorbs hydrogen, so as to reduce the pressure inside the tank body (1).

2. The solid-state hydrogen storage tank according to claim 1, wherein the hydrogen storage device (2) comprises a hydrogen storage assembly (21) and a heat exchange assembly (22); wherein the hydrogen storage assembly (21) is vertically inserted into the tank body (1); and the heat exchange assembly (22) is arranged around the hydrogen storage assembly (21) to enclose a heat exchange chamber (20); wherein the heat exchange assembly (22) heats the heat exchange chamber (20), thereby increasing the temperature of the hydrogen storage assembly (21) to cause hydrogen to be desorbed from the hydrogen storage assembly (21).

3. The solid-state hydrogen storage tank according to claim 2, wherein the hydrogen storage assembly (21) comprises at least two hydrogen storage alloy sheets; an exhaust gap (23) is left between the two hydrogen storage alloy sheets for the desorbed hydrogen to flow.

4. The solid-state hydrogen storage tank according to claim 3, wherein an exhaust hole (30) is formed on the top of the tank body (1); the exhaust hole (30) extends into the hydrogen storage assembly (21) to form the exhaust gap (23).

5. The solid-state hydrogen storage tank according to claim 4, wherein the hydrogen discharge device (3) comprises a shell (31) and a pressure regulating mechanism (32); the shell (31) is arranged on the top of the tank body (1) to cover the exhaust hole (30); the pressure regulating mechanism (32) is arranged in the shell (31) and moves up and down to change the volume in the shell (31), thereby changing the volume inside the tank body (1).

6. The solid-state hydrogen storage tank according to claim 5, wherein the pressure regulating mechanism (32) comprises a pressure regulating piston (321); the pressure regulating piston (321) is slidingly arranged in the shell (31); wherein the pressure regulating piston (321) is adapted to move backward when the pressure inside the tank body (1) rises, so as to increase the volume in the shell (31).

7. The solid-state hydrogen storage tank according to claim 6, wherein the pressure regulating mechanism (32) further comprises a pressure relief flow channel (322) formed on the side wall of the shell; and a pressure relief assembly arranged in the pressure relief flow channel (322); wherein the pressure relief assembly is adapted to be in an open state when the pressure regulating piston (321) is in an initial position, so that part of the overflow hydrogen inside the tank body (1) flows into the space above the pressure regulating piston (321) through the pressure relief flow channel (322).

8. The solid-state hydrogen storage tank according to claim 7, wherein the pressure relief assembly comprises a pressure relief plate (323) and a pressure relief spring (324). The width of the pressure relief plate (323) is less than the width of the pressure relief flow channel (322), and the pressure relief plate (323) is adapted to be attached to one end of the sidewall of the pressure relief flow channel (322) under the elastic action of the pressure relief spring (324), thereby blocking the inlet and outlet of the pressure relief flow channel (322).

9. The solid hydrogen storage tank of claim 8, wherein, The pressure relief plate (323) is further provided with a trigger protrusion, which extends into the shell from the pressure relief flow channel (322). The position of the trigger protrusion corresponds to the initial position of the pressure regulating piston (321).

10. The solid hydrogen storage tank of claim 9, wherein, The top of the shell is further provided with an exhaust pipe (325), one end of which is in communication with the inside of the shell (31); and The other end of the exhaust pipe (325) is further provided with a pressure relief valve (326).

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