阅读说明：本技术 金属氢化物储氢罐 (Metal hydride hydrogen storage tank ) 是由 杨波 卢彦杉 何彬彬 江军 潘军 郑海光 于 2021-07-21 设计创作，主要内容包括：本发明涉及一种金属氢化物储氢罐,包括：罐体、多个储氢合金模块以及记忆合金应变缓冲复位器,其中罐体能够收容多个储氢合金模块,多个储氢合金模块能够与氢气反应生成金属氢化物实现氢气存储,记忆合金应变缓冲复位器能够缓冲储氢合金模块吸氢过程产生的膨胀应力,并在储氢合金模块放氢时恢复形状使得储氢合金模块恢复原有外形,确保储氢合金粉末在罐体内均匀分布。上述金属氢化物储氢罐,制作加工容易,吸放氢速度快,通过记忆合金应变缓冲复位器能够减缓储氢合金模块吸氢膨胀对罐体产生的过大应力,同时也能够防止储氢合金粉末在罐体内的局部聚集产生的应力集中,从而保证金属氢化物储氢罐的安全性以及延长金属氢化物储氢罐的使用寿命。(The present invention relates to a metal hydride hydrogen storage tank, comprising: the hydrogen storage alloy module comprises a tank body, a plurality of hydrogen storage alloy modules and a memory alloy strain buffer restorer, wherein the tank body can accommodate the hydrogen storage alloy modules, the hydrogen storage alloy modules can react with hydrogen to generate metal hydride to realize hydrogen storage, and the memory alloy strain buffer restorer can buffer expansion stress generated in the hydrogen absorption process of the hydrogen storage alloy modules and restore the shape when the hydrogen storage alloy modules are released, so that the hydrogen storage alloy modules restore the original shape, and hydrogen storage alloy powder is ensured to be uniformly distributed in the tank body. The metal hydride hydrogen storage tank is easy to manufacture and process and high in hydrogen absorbing and releasing speed, and the memory alloy strain buffer restorer can relieve overlarge stress generated by hydrogen absorbing expansion of the hydrogen storage alloy module on the tank body and prevent the stress concentration generated by local aggregation of hydrogen storage alloy powder in the tank body, so that the safety of the metal hydride hydrogen storage tank is ensured and the service life of the metal hydride hydrogen storage tank is prolonged.)

1. A metal hydride hydrogen storage canister, comprising:

the tank body comprises a cavity and an air inlet and an air outlet communicated with the cavity, and the air inlet and the air outlet are provided with control valves;

the hydrogen storage alloy modules comprise hydrogen storage alloy powder layers uniformly filled with hydrogen storage alloy powder, the hydrogen storage alloy modules are sequentially stacked in the cavity along the height direction of the tank body, each hydrogen storage alloy module is provided with at least one through hole which is arranged along the height direction of the tank body and penetrates through the hydrogen storage alloy module, and the through holes of the hydrogen storage alloy modules correspond to each other along the height direction of the tank body and are communicated with each other to form at least one mounting channel; and

the memory alloy strain buffer restorer is arranged in the installation channel and can buffer the expansion of the hydrogen storage alloy module through contraction and absorb the stress caused by the expansion when the hydrogen storage alloy module expands due to the hydrogen absorption of the hydrogen storage alloy powder in the hydrogen storage alloy module; when the hydrogen storage alloy powder in the hydrogen storage alloy module is discharged, the hydrogen storage alloy module and the memory alloy strain buffer restorer are heated simultaneously, the memory alloy strain buffer restorer can restore the original shape, and acting force is applied to the hydrogen storage alloy module to enable the hydrogen storage alloy module to restore the original shape.

2. The metal hydride hydrogen storage canister of claim 1, wherein the hydrogen storage alloy module further comprises a thermally conductive layer and an outer wrapping layer, the outer wrapping layer wrapping the thermally conductive layer and the hydrogen storage alloy powder layer.

3. A metal hydride hydrogen storage canister as claimed in claim 1, wherein said hydrogen storage alloy powder comprises: titanium system AB₂Type AB and type BSoil system AB₅Type and titanium vanadium solid solution.

4. The metal hydride hydrogen storage canister as claimed in claim 1, wherein a filter is disposed at an end of the gas inlet/outlet adjacent to the cavity, the filter being capable of preventing the hydrogen storage alloy powder from overflowing after repeated hydrogen absorption and desorption cycles of the hydrogen storage alloy module.

5. A metal hydride hydrogen storage canister as claimed in claim 1, wherein the memory alloy strain relief repositioner includes a support tube disposed within the mounting passage and communicating with the cavity, the support tube being hollow inside, hydrogen gas being able to flow within the support tube.

6. A metal hydride hydrogen storage canister as claimed in claim 5, wherein the length of the support tube is an integer multiple of the height of a single module of the hydrogen storage alloy, or the length of the support tube is the same as the height of the chamber.

7. The metal hydride hydrogen storage canister of claim 5, wherein said memory alloy strain buffer repositioner further comprises a filter plate, said filter plate being disposed at one end of said support tube;

the filter plate is arranged between the two hydrogen storage alloy modules, and the filter plate can allow hydrogen to pass through and can obstruct the hydrogen storage alloy powder from passing through.

8. The metal hydride hydrogen storage canister as claimed in claim 5, wherein the support tube is a titanium nickel shape memory alloy tube.

9. The metal hydride hydrogen storage canister of claim 7, wherein said filter plate is a porous plate sintered from a metal powder comprising one of iron, aluminum, copper or an alloy of iron, aluminum and copper, said porous plate having a pore diameter smaller than the smallest diameter of said hydrogen storage alloy powder.

10. A metal hydride hydrogen storage canister as claimed in claim 1, wherein the number of said hydrogen storage alloy modules is 10, each of said hydrogen storage alloy modules is provided with 10 of said through-holes and is capable of forming 10 of said mounting passages;

the number of the memory alloy strain buffer reductors is the same as that of the hydrogen storage alloy modules, and each memory alloy strain buffer reductor is respectively installed in 10 installation channels in a one-to-one correspondence mode.

Technical Field

The invention relates to the technical field of hydrogen storage, in particular to a metal hydride hydrogen storage tank.

Background

Hydrogen energy is regarded as an ideal energy source for human beings in the future, but the storage and transportation of hydrogen gas are one of the major bottlenecks facing hydrogen energy application, and technical challenges are urgently needed. At present, there are three main ways of storing hydrogen: high pressure gaseous hydrogen storage, low temperature liquid hydrogen storage, and metal hydride solid state hydrogen storage. Wherein, the metal hydride solid-state hydrogen storage technology realizes the storage of hydrogen by utilizing the reaction of hydrogen and hydrogen storage alloy. Compared with other hydrogen storage modes, the metal hydride solid-state hydrogen storage technology has the advantages of high hydrogen storage density, low working pressure, high safety and the like, and brings a chance for popularization and application of hydrogen energy.

An important problem of the current metal hydride hydrogen storage tank design is the influence of hydrogen absorption and expansion of the hydrogen storage alloy on the tank body of the metal hydride hydrogen storage tank. The hydrogen-storing alloy expands in volume after absorbing hydrogen, e.g. LaNi₅The volume expansion of the hydrogen storage alloy after hydrogen absorption is about 25%, additional stress is generated on the body of the metal hydride hydrogen storage tank, and if the stress is too large, irreversible plastic deformation and even breakage can be generated, so that the metal hydride hydrogen storage tank is damaged. In addition, the hydrogen storage alloy powder can be gradually settled under the action of repeated expansion/contraction and gravity in the hydrogen absorption/desorption process, so that the hydrogen storage alloy powder is gathered at certain parts in the hydrogen storage tank, and the gathered hydrogen storage alloy can exert larger stress on the local part of the tank body during hydrogen absorption and expansion, so that the tank body is subjected to plastic deformation and even fracture failure. Therefore, how to eliminate the overlarge stress generated by the hydrogen absorption expansion of the hydrogen storage alloy on the metal hydride hydrogen storage tank body, and keep the hydrogen storage alloy powder to be uniformly distributed in the hydrogen storage tank, so as to avoid the excessive plastic deformation of the hydrogen storage tank body is the key for ensuring the safety of the metal hydride hydrogen storage tank and prolonging the service life.

Disclosure of Invention

Based on the above, the metal hydride hydrogen storage tank is provided, so that overlarge stress applied to the tank body by hydrogen absorption expansion of the hydrogen storage alloy is slowed down or eliminated, local aggregation of the hydrogen storage alloy powder in the hydrogen storage tank is prevented, the hydrogen storage alloy powder is uniformly distributed in the hydrogen storage tank, the safety of the metal hydride hydrogen storage tank is improved, and the service life of the metal hydride hydrogen storage tank is prolonged.

A metal hydride hydrogen storage canister, comprising:

the tank body comprises a cavity and an air inlet and an air outlet communicated with the cavity, and the air inlet and the air outlet are provided with control valves;

the hydrogen storage alloy modules comprise hydrogen storage alloy powder layers uniformly filled with hydrogen storage alloy powder, the hydrogen storage alloy modules are sequentially stacked in the cavity along the height direction of the tank body, each hydrogen storage alloy module is provided with at least one through hole which is arranged along the height direction of the tank body and penetrates through the hydrogen storage alloy module, and the through holes of the hydrogen storage alloy modules correspond to each other along the height direction of the tank body and are communicated with each other to form at least one mounting channel; and

the memory alloy strain buffer restorer is arranged in the installation channel and can buffer the expansion of the hydrogen storage alloy module through contraction and absorb the stress caused by the expansion when the hydrogen storage alloy module expands due to the hydrogen absorption of the hydrogen storage alloy powder in the hydrogen storage alloy module; when the hydrogen storage alloy powder in the hydrogen storage alloy module is discharged, the hydrogen storage alloy module and the memory alloy strain buffer restorer are heated simultaneously, the memory alloy strain buffer restorer can restore the original shape, and acting force is applied to the hydrogen storage alloy module to enable the hydrogen storage alloy module to restore the original shape.

The metal hydride hydrogen storage tank realizes the storage and release of hydrogen through the reversible reaction between the hydrogen storage alloy powder in the hydrogen storage alloy module and hydrogen, and when the hydrogen storage alloy module expands due to the hydrogen absorption of the hydrogen storage alloy powder in the hydrogen storage alloy module, the memory alloy strain buffer restorer can buffer the expansion of the hydrogen storage alloy module through contraction and absorb the stress caused by the expansion; when the hydrogen storage alloy powder in the hydrogen storage alloy module is discharged, the hydrogen storage alloy module and the memory alloy strain buffer restorer are heated simultaneously, the memory alloy strain buffer restorer can restore the original shape, and acting force is applied to the hydrogen storage alloy module to enable the hydrogen storage alloy module to restore the original shape. The memory alloy strain buffer restorer can slow down the overlarge stress applied to the tank body by the hydrogen absorption expansion of the hydrogen storage alloy module, can prevent the local aggregation of the hydrogen storage alloy powder in the tank body, and keeps the uniform distribution of the hydrogen storage alloy powder in the hydrogen storage tank, thereby ensuring the safety of the metal hydride hydrogen storage tank and prolonging the service life of the metal hydride hydrogen storage tank.

In one embodiment, the hydrogen storage alloy module further comprises a thermally conductive layer and an outer wrapping layer, the outer wrapping layer wrapping the thermally conductive layer and the hydrogen storage alloy powder layer.

In one embodiment, the hydrogen storage alloy powder comprises: titanium system AB₂Type AB and type AB, rare earth system AB₅Type and titanium vanadium solid solution.

In one embodiment, a filter is disposed at one end of the gas inlet and outlet close to the cavity, and the filter can prevent the hydrogen storage alloy powder from overflowing after the hydrogen storage alloy module repeatedly absorbs and releases hydrogen.

In one embodiment, the memory alloy strain buffer repositor comprises a support tube, wherein the support tube is arranged in the installation channel and is communicated with the cavity, the interior of the support tube is hollow, and hydrogen can flow in the support tube.

In one embodiment, the length of the support tube is an integral multiple of the height of a single hydrogen storage alloy module, or the length of the support tube is the same as the height of the cavity.

In one embodiment, the memory alloy strain buffer restorer further comprises a filter plate, wherein the filter plate is arranged at one end of the support tube;

the filter plate is arranged between the two hydrogen storage alloy modules, and the filter plate can allow hydrogen to pass through and can obstruct the hydrogen storage alloy powder from passing through.

In one embodiment, the support tube is a titanium nickel shape memory alloy tube.

In one embodiment, the filter plate is a porous plate sintered from a metal powder comprising one of iron, aluminum, copper, or an alloy of iron, aluminum, and copper, the porous plate having a pore diameter smaller than the minimum diameter of the hydrogen storage alloy powder.

In one embodiment, the number of the hydrogen storage alloy modules is 10, each of the hydrogen storage alloy modules is provided with 10 through holes, and 10 installation channels can be formed;

the number of the memory alloy strain buffer reductors is the same as that of the hydrogen storage alloy modules, and each memory alloy strain buffer reductor is respectively installed in 10 installation channels in a one-to-one correspondence mode.

Drawings

Fig. 1 is a schematic structural view of a metal hydride hydrogen storage canister in an embodiment of the invention;

FIG. 2 is a schematic structural view of a hydrogen occluding alloy module according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a memory alloy strain buffer restorer in an embodiment of the present invention.

Reference numerals:

100. a tank body; 110. a cavity; 120. an air inlet and an air outlet; 130. a control valve; 140. a filter disc;

200. a hydrogen storage alloy module; 210. a hydrogen storage alloy powder layer; 220. a through hole; 230. installing a channel; 300. a memory alloy strain buffer restorer; 310. supporting a tube; 320. a filter plate.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The solid hydrogen storage technology of metal hydride has the advantages of high hydrogen storage density, low working pressure, high safety and the like, and brings a chance for popularization and application of hydrogen energy. An important problem of the current metal hydride hydrogen storage tank design is the influence of hydrogen absorption and expansion of the hydrogen storage alloy on the tank body of the metal hydride hydrogen storage tank. The hydrogen-storing alloy expands in volume after absorbing hydrogen, e.g. LaNi₅The volume expansion of the hydrogen storage alloy after hydrogen absorption is about 25%, additional stress is generated on the body of the metal hydride hydrogen storage tank, and if the stress is too large, irreversible plastic deformation and even breakage can be generated, so that the metal hydride hydrogen storage tank is damaged. In addition, the hydrogen storage alloy powder can be gradually settled under the action of repeated expansion/contraction and gravity in the hydrogen absorption/desorption process, so that the hydrogen storage alloy powder is gathered at certain parts in the hydrogen storage tank, and the gathered hydrogen storage alloy can exert larger stress on the local part of the tank body during hydrogen absorption and expansion, so that the tank body is subjected to plastic deformation and even fracture failure. Thus, how to eliminate storesThe hydrogen alloy absorbs hydrogen and expands to generate overlarge stress on the metal hydride hydrogen storage tank body, and the hydrogen storage alloy powder is kept to be uniformly distributed in the hydrogen storage tank, so that the excessive plastic deformation of the hydrogen storage tank body is avoided, and the key points of ensuring the safety of the metal hydride hydrogen storage tank and prolonging the service life are realized.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a metal hydride hydrogen storage tank according to an embodiment of the present invention, and the metal hydride hydrogen storage tank according to the embodiment of the present invention includes: the hydrogen storage tank comprises a tank body 100, a plurality of hydrogen storage alloy modules 200 and a memory alloy strain buffer restorer 300, wherein the tank body 100 can accommodate the plurality of hydrogen storage alloy modules 200, and the plurality of hydrogen storage alloy modules 200 can reversibly react with hydrogen to realize the storage and release of the hydrogen. The hydrogen storage alloy module 200 expands during hydrogen absorption, and the memory alloy strain buffer restorer 300 can buffer the expansion of the hydrogen storage alloy module 200 through contraction and absorb the stress caused by the expansion; in the hydrogen discharge process, the hydrogen storage alloy module 200 and the memory alloy strain buffer restorer 300 are heated simultaneously, the memory alloy strain buffer restorer 300 can restore the original shape, the acting force is applied to the hydrogen storage alloy module 200 to enable the hydrogen storage alloy module 200 to restore the original shape, the excessive stress applied to the tank body 100 by the hydrogen absorption expansion of the hydrogen storage alloy module 200 is relieved, meanwhile, the local aggregation of hydrogen storage alloy powder in the tank body 100 can be prevented, and further the hydrogen storage alloy powder is uniformly distributed in the tank body 100.

Specifically, the tank 100 includes a cavity 110 and an air inlet and outlet 120 communicated with the cavity 110, the air inlet and outlet 120 is provided with a control valve 130, and the control valve 130 can control the opening and closing of the air inlet and outlet 120 of the tank 100.

The plurality of hydrogen storage alloy modules 200 include a hydrogen storage alloy powder layer 210 uniformly filled with hydrogen storage alloy powder, the plurality of hydrogen storage alloy modules 200 are sequentially stacked in the cavity 110 along the height direction of the tank 100, each hydrogen storage alloy module 200 is provided with at least one through hole 220 along the height direction of the tank 100 and penetrating through the hydrogen storage alloy module 200, as shown in fig. 2, the through holes 220 of the plurality of hydrogen storage alloy modules 200 correspond to each other along the height direction of the tank 100 and are communicated to form at least one installation passage 230.

It should be noted that the hydrogen storage alloy powder layer 210 can react with hydrogen to generate metal hydride, thereby achieving the purpose of storing hydrogen. When the hydrogen storage alloy powder layer 210 absorbs hydrogen, it causes the hydrogen storage alloy module 200 to expand in volume and exert a stress action on the tank 100. If the stress on the tank 100 generated by the hydrogen storage alloy module 200 after hydrogen absorption and expansion is excessive, the tank 100 may be cracked, which reduces the safety and the service life of the tank 100, and thus it is necessary to relieve the excessive stress on the tank 100 generated by the hydrogen absorption and expansion of the hydrogen storage alloy module 200. The hydrogen storage alloy powder is migrated under the action of repeated expansion/contraction and gravity in the hydrogen absorption/desorption process, the hydrogen storage alloy powder is gathered at some parts in the tank body 100 and is unevenly distributed in the tank body 100, so that the stress concentration of the local area of the tank body 100 is caused, and the risk of the damage of the tank body 100 is increased, so that the local gathering of the hydrogen storage alloy powder in the tank body 100 needs to be prevented, and the hydrogen storage alloy powder is ensured to be evenly distributed in the tank body.

The at least one installation passage 230 is formed by, for example, assuming that the number of hydrogen storage alloy modules is 3, respectively A, B and C, each hydrogen storage alloy module is provided with 2 through-holes, respectively assumed that the through-holes of the hydrogen storage alloy module A are A1 and A2, respectively; through holes on the hydrogen storage alloy module B are B1 and B2 respectively; the through holes of the hydrogen storage alloy module C are respectively C1 and C2, wherein A1, B1 and C1 correspond to each other along the height direction of the tank body and can form a mounting channel, and similarly, A2, B2 and C2 can form another mounting channel. According to the stress analysis in the tank placement condition and the hydrogen absorption and desorption process, one of the installation channels is preferably designed in the center of the hydrogen storage alloy module.

The memory alloy strain buffer restorer 300 is arranged in the installation channel 230, and when the hydrogen storage alloy module 200 is deformed due to the volume expansion of the hydrogen storage alloy module 200 caused by the hydrogen absorption of the hydrogen storage alloy powder in the hydrogen storage alloy module 200, the memory alloy strain buffer restorer 300 can buffer the expansion of the hydrogen storage alloy module 200 through contraction and absorb the stress caused by the expansion of the hydrogen storage alloy module 200; when the hydrogen storage alloy powder in the hydrogen storage alloy module 200 is discharged, the hydrogen storage alloy module 200 and the memory alloy strain buffer repositor 300 are heated at the same time, the memory alloy strain buffer repositor 300 can recover the original shape, and an acting force is applied to the hydrogen storage alloy module 200 to enable the hydrogen storage alloy module 200 to recover the original shape.

In the embodiment, the memory alloy strain buffer restorer 300 can relieve the excessive stress on the tank 100 caused by the volume expansion of the hydrogen storage alloy module 200 after hydrogen absorption, and can also prevent the stress concentration caused by the local aggregation of the hydrogen storage alloy powder in the tank 100, thereby ensuring the safety of the metal hydride hydrogen storage tank and prolonging the service life of the metal hydride hydrogen storage tank.

In one embodiment, the hydrogen storage alloy module 200 further includes a heat conductive layer (not shown) and an outer cladding layer (not shown), wherein the outer cladding layer surrounds the heat conductive layer and the hydrogen storage alloy powder layer 210, the heat conductive layer is capable of improving the heat transfer performance of the hydrogen storage alloy powder layer 210, and the outer cladding layer is capable of preventing the heat conductive layer and the hydrogen storage alloy powder layer 210 from moving in the tank.

In order to provide the hydrogen storage alloy powder layer 210 with a good hydrogen absorption and desorption capacity, in one embodiment, the hydrogen storage alloy powder includes: titanium system AB₂Type AB and type AB, rare earth system AB₅Type and titanium vanadium solid solution.

In order to further prevent the hydrogen storage alloy powder in the hydrogen storage alloy powder layer 210 from being discharged along with the process of releasing hydrogen, thereby ensuring the hydrogen absorption and release performance of the metal hydride hydrogen storage tank, in an embodiment, referring to fig. 1, a filter sheet 140 is disposed at one end of the gas inlet and outlet 120 of the tank 100 close to the cavity 110, wherein the filter sheet 140 can prevent the hydrogen storage alloy powder in the hydrogen storage alloy powder layer 210 from overflowing after the hydrogen absorption and release cycles of the hydrogen storage alloy module 200 are repeated. It should be noted that the filter sheet 140 has pores to allow hydrogen gas to pass therethrough, and to block the hydrogen storage alloy powder from passing therethrough.

In one embodiment, referring to fig. 3, the memory alloy strain relief repositor 300 comprises a support tube 310, wherein the support tube 310 is disposed in the installation channel 230 and is in communication with the cavity 110, the support tube 310 is hollow inside, and hydrogen gas can flow in the support tube 310. It should be noted that the support tube 310 is capable of buffering the expansion stress generated during the hydrogen absorption process of the hydrogen storage alloy module 200, and the support tube 310 is heated simultaneously with the hydrogen storage alloy module 200 when the hydrogen storage alloy module 200 releases hydrogen, and its recovered shape allows the hydrogen storage alloy module 200 to recover its original shape. Wherein the support tube 310 is a titanium-nickel shape memory alloy tube, and the reset temperature thereof is the same as the hydrogen discharge temperature of the hydrogen storage alloy module 200.

Further, the length of the support tube 310 in the memory alloy strain relief repositor 300 is an integral multiple of the height of a single hydrogen storage alloy module 200, or the length of the support tube 310 is the same as the height of the cavity 110, which enables the support tube 310 to be easily installed in the installation channel 230 formed by the through hole 220 of the hydrogen storage alloy module 200. For example, the height dimension of a single hydrogen storage alloy module 200 is X, and the length dimension of the support tube 310 in the memory alloy strain buffer repositioner 300 is nx, where N may represent a positive integer; or the length of the support pipe 310 is 3X, the height dimension of a single hydrogen storage alloy module 200 is X, and the number of hydrogen storage alloy modules 200 is 6, that is, the total height of the hydrogen storage alloy modules 200 is 6X, in which case two support pipes 310 of the same length dimension may be provided. The advantage of this design is that the length dimension of the support tube 310 in the memory alloy strain buffer repositor 300 can be adapted to the height dimension of the hydrogen storage alloy modules 200, i.e. it can be realized that one memory alloy strain buffer repositor 300 corresponds to exactly one hydrogen storage alloy module 200, or exactly corresponds to a plurality of hydrogen storage alloy modules 200.

In another embodiment, referring to FIG. 1, the memory alloy strain relief repositioner 300 further comprises a filter plate 320, wherein the filter plate 320 is disposed at one end of the support tube 310; the filter plate 320 is installed between the two hydrogen storage alloy modules 200, and the filter plate 320 allows hydrogen to pass therethrough while blocking the hydrogen storage alloy powder from passing therethrough. The filter plate 320 has pores that allow hydrogen gas to pass therethrough while preventing the hydrogen storage alloy powder from passing therethrough. The filter plate 320 may be selected as a pore plate sintered with metal powder including one of iron, aluminum, copper or an alloy of iron, aluminum and copper, and having a pore diameter smaller than the minimum diameter of the hydrogen storage alloy powder.

In one embodiment, the number of the hydrogen storage alloy modules 200 is 10, and 10 hydrogen storage alloy modules 200 are stacked in the cavity 110 of the tank 100 in the height direction of the tank 100. Each hydrogen storage alloy module 200 is provided with 10 through-holes 220 and is capable of forming 10 installation passages 230; meanwhile, the number of the memory alloy strain buffer repositors 300 is the same as that of the hydrogen storage alloy modules 200, and each memory alloy strain buffer repositor 300 is respectively installed in 10 installation channels 230 in a one-to-one correspondence manner. The metal hydride hydrogen storage tank can have higher safety and longer service life under the arrangement design.

Further, in one embodiment, in an actual production process, the cavity 110 of the can body 100 has an outer diameter of 70mm, a wall thickness of 3mm and a length of 445mm, the individual hydrogen storage alloy module 200 has an outer diameter of 64mm and a height of 42mm, the through-hole 220 of the hydrogen storage alloy module 200 has a diameter of 8mm, and the hydrogen storage alloy powder layer 210 of the individual hydrogen storage alloy module 200 comprises (TiZr)₁(VFeMn)₂45g of hydrogen storage alloy powder, 8mm of outer diameter of the supporting tube 310 of the memory alloy strain buffer repositor 300, 2mm of wall thickness, 42mm of length and Ti as material_48.5Ni_48.5Fe₃The diameter of the memory alloy pipe and the filter plate 320 is 64mm, the thickness is 2mm, and the material is a porous steel plate sintered by 316L stainless steel powder. The design structure can facilitate the processing of the metal hydride hydrogen storage tank, simultaneously enable the hydrogen absorbing and releasing capacity of the metal hydride hydrogen storage tank to be excellent, and also can ensure the safety of the metal hydride hydrogen storage tank and prolong the service life of the metal hydride hydrogen storage tank.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.