Hydrogen storage device using solid storage material with increased heat exchange area

Abstract

The present invention relates to a hydrogen storage device utilizing a solid adsorbent material with an increased heat exchange area, and more specifically, to a hydrogen storage device utilizing a bar-shaped solid adsorbent material with increased hydrogen absorption efficiency, wherein the flow path and auxiliary flow path located within the hydrogen storage device and through which the refrigerant flows are designed to maximize the heat exchange area capable of removing the reaction heat generated during the hydrogen absorption process, thereby facilitating the management of reaction heat.

Description

Technology Field

[0001] The present invention relates to a hydrogen storage device utilizing a solid adsorbent material with an increased heat exchange area, and more specifically, to a hydrogen storage device utilizing a bar-shaped solid adsorbent material with increased hydrogen absorption efficiency, wherein the flow path and auxiliary flow path located within the hydrogen storage device and through which the refrigerant flows are designed to maximize the heat exchange area capable of removing the reaction heat generated during the hydrogen absorption process, thereby facilitating the management of reaction heat. Background Technology

[0002] Traditionally, automobiles have used engines powered by the combustion of fossil fuels as a power source. However, due to environmental pollution and the depletion of fossil fuels, various studies are being conducted on eco-friendly vehicles that can replace or conserve fossil fuels. Representative examples include electric vehicles (EVs) powered by battery-operated motors, hybrid electric vehicles (HEVs) that use a combination of engines and motors, and plug-in electric vehicles (PHEVs) which are similar in form to HEVs but equipped with an electric plug for charging.

[0003] Recently, active research is being conducted on Fuel Cell Electric Vehicles (FCEVs) that use hydrogen fuel cells to operate on hydrogen fuel instead of rechargeable batteries.

[0004] When water is electrolyzed, hydrogen and oxygen are generated at the electrodes. A hydrogen fuel cell is a battery that operates on the principle of producing electricity by supplying hydrogen and oxygen using the reverse reaction of this electrolysis. Since these hydrogen fuel cells generate only water vapor as a byproduct after electricity production, they cause no environmental pollution issues whatsoever. Furthermore, unlike conventional chemical batteries, they have the significant advantage of being able to continuously produce electricity as long as fuel (hydrogen) and air (oxygen) are supplied. However, while oxygen can be easily supplied in the form of compressed air because the atmosphere contains about 20% oxygen, hydrogen must be supplied in a stored state using a storage device.

[0005] As the most basic form of such hydrogen storage devices, there is the hydrogen high-pressure tank, which compresses and stores gaseous hydrogen under high pressure. Since vehicles using LPG as fuel have already been commercialized, automotive hydrogen storage devices in the form of hydrogen high-pressure tanks, similar to these LPG high-pressure tanks, could be easily developed. However, to increase the driving range of a vehicle, a larger amount of hydrogen must be stored in a limited space, which creates a risk factor where the internal pressure of the hydrogen high-pressure tank reaches an enormous level of 700 bar. Therefore, when using hydrogen high-pressure tanks, advanced safety design is additionally required to suppress these risk factors, and consequently, there is a problem where the system weight and volume increase, significantly reducing efficiency.

[0006] To address these problems, a new method of storing (absorbing) hydrogen by adsorbing it onto solid compounds is being researched. When storing 5.6 kg of hydrogen, compressing gaseous hydrogen to 700 bar (under the same conditions as existing high-pressure hydrogen tanks) requires a volume of 144 L, and at -253°C It is known that 80 L of volume is required to store liquid hydrogen liquefied by liquefying. Meanwhile, it is known that the volume can be reduced to 46 L when using LaNi6H6 as a solid compound that absorbs hydrogen, and to 36 L when using Mg2FeH6.

[0007] As such, while it is known that hydrogen storage devices in the form of solid adsorption materials (solid compounds) are highly efficient when considering aspects such as stability and volume, there are still issues that make commercialization difficult.

[0008] During the process of absorbing hydrogen in a solid adsorbent, a phenomenon occurs in which reaction heat is generated, which reduces the reaction rate of hydrogen absorption in the solid adsorbent. Currently, the injection time for fuels such as gasoline and diesel is generally about 3 to 5 minutes. In order to secure an absorption time at the level of the existing injection time by applying a hydrogen storage device in the form of a solid adsorbent that has absorbed hydrogen, a device is required that can effectively manage the reaction heat generated during hydrogen absorption. Prior art literature

[0009] Republic of Korea Published Patent Application No. 10-2021-0045683 The problem to be solved

[0010] The present invention relates to a hydrogen storage device utilizing a solid adsorbent material with an increased heat exchange area, and more specifically, to a hydrogen storage device utilizing a bar-shaped solid adsorbent material with increased hydrogen absorption efficiency, wherein the flow path and auxiliary flow path located within the hydrogen storage device and through which the refrigerant flows are designed to maximize the heat exchange area capable of removing the reaction heat generated during the hydrogen absorption process, thereby facilitating the management of reaction heat. means of solving the problem

[0011] A hydrogen storage device using a solid adsorbent material with an increased heat exchange area according to the present invention comprises: a case portion into which hydrogen is introduced; a flow path portion located inside the case portion through which a refrigerant flows; and an adsorbent portion coupled to the outer surface of the flow path portion; wherein the adsorbent portion is coupled with a bar-shaped solid adsorbent material that adsorbs and desorbs the hydrogen, and an auxiliary flow path portion through which a refrigerant flows is coupled along the outer surface of the flow path portion.

[0012] In addition, the adsorption portion of the hydrogen storage device using a solid adsorption material with an increased heat exchange area according to the present invention comprises a housing portion through which the flow path portion and the auxiliary flow path portion penetrate the center, and the adsorption material is accommodated in the housing portion.

[0013] In addition, the outer surface of the housing portion of the hydrogen storage device using a solid adsorbent material with an increased heat exchange area according to the present invention includes a groove portion that is formed extending along the longitudinal direction of the housing portion and is recessed toward the center; and the adsorbent material is accommodated in the groove portion.

[0014] In addition, the housing portion of the hydrogen storage device using a solid adsorbent material with an increased heat exchange area according to the present invention is coupled to the flow path portion so as to be separable from the flow path portion and the auxiliary flow path portion.

[0015] In addition, the auxiliary flow channel of the hydrogen storage device using a solid adsorbent material with an increased heat exchange area according to the present invention is formed along the outer surface of the flow channel, and has a cross-sectional area smaller than that of the flow channel. Effects of the invention

[0016] According to the present invention, hydrogen absorption efficiency is increased by utilizing a bar-shaped solid adsorption material.

[0017] In addition, the flow path through which the refrigerant flows is designed to maximize the heat exchange area capable of removing the reaction heat generated during the hydrogen absorption process, which has the advantage of facilitating reaction heat management.

[0018] In addition, there is an advantage in that the heat exchange area is increased by forming an auxiliary flow path.

[0019] In addition, it has the effect of minimizing the detachment of solid adsorbent material and improving the bonding retention force of the housing part. Brief explanation of the drawing

[0020] Figure 1 illustrates the external appearance of a hydrogen storage device according to the present invention. FIG. 2 illustrates only the first flow path section inside the hydrogen storage device according to the present invention. FIG. 3 illustrates the configuration of the first flow path and the second flow path inside the hydrogen storage device according to the present invention. FIG. 4 is an enlarged view of the first-1 auxiliary flow path section according to the present invention. Figure 5 shows a cross-section of the absorption portion according to the present invention. FIG. 6 illustrates a housing portion according to another embodiment of the present invention. FIG. 7 illustrates a housing portion according to another embodiment of the present invention. Specific details for implementing the invention

[0021] The following description merely illustrates the principles of the present invention. Therefore, a person skilled in the art may invent various devices that embody the principles of the present invention and are included within the concept and scope of the present invention, even though they are not explicitly described or illustrated in this specification. Furthermore, all conditional terms and embodiments listed in this specification are, in principle, explicitly intended only for the purpose of understanding the concept of the present invention and should be understood not as being limited to the embodiments and conditions specifically listed as such.

[0022] Furthermore, it should be understood that all detailed descriptions enumerating specific embodiments, as well as the principles, aspects, and embodiments of the present invention, are intended to include structural and functional equivalents thereof. In addition, it should be understood that such equivalents include not only currently known equivalents but also equivalents to be developed in the future, that is, all elements invented to perform the same function regardless of structure.

[0023] The aforementioned objectives, features, and advantages will become clearer through the following detailed description in conjunction with the attached drawings, and accordingly, a person skilled in the art to which the present invention pertains will be able to easily implement the technical concept of the present invention. Furthermore, in describing the present invention, if it is determined that a detailed description of known technology related to the present invention may unnecessarily obscure the essence of the present invention, such detailed description will be omitted.

[0024] Hereinafter, various embodiments of the present invention will be described in detail with reference to the attached drawings.

[0026] FIG. 1 illustrates the exterior of a hydrogen storage device according to the present invention, FIG. 2 illustrates only the first flow path section inside the hydrogen storage device according to the present invention, and FIG. 3 illustrates the configuration of the first flow path section and the second flow path section inside the hydrogen storage device according to the present invention together. Hereinafter, the configuration and effects of the hydrogen storage device according to the present invention will be explained with reference to FIG. 1 to FIG. 3.

[0027] The hydrogen storage device according to the present invention includes a case portion (10) and an inlet portion (20). The inlet portion (20) is coupled to the top of the case portion (10) and is a passage through which hydrogen (1) is introduced. The case portion (10) is preferably a cylindrical shape, for example, having a hollow portion formed therein.

[0028] A flow path section (100) and an absorption section are formed inside the case section (10). Additionally, hydrogen (1) is introduced into the interior of the case section (10). First, the flow path section (100) will be described.

[0029] The flow path (100) includes a first-1 flow path (110) and a first-2 flow path (120). At this time, one end of the first-1 flow path (110) penetrates through the lower part of the case part (10) and communicates with the outside of the case part (10), and the other end of the first-2 flow path (120) also penetrates through the lower part of the case part (10) and communicates with the outside of the case part (10).

[0030] The first-1 Euro section (110) starts from the bottom of the case section (10) and extends upward in a vertical direction, but is bent and extended in one direction, then bent and extended again in a vertical direction, then bent and extended again in the other direction, and the above shape is repeated upward in a vertical direction to form a flow path. In FIG. 2, the shape is shown repeated a total of three times, but this is an example.

[0031] The other end of the first-1 flow path (110) is connected to the first end of the first-2 flow path (120). The first-2 flow path (120) is formed by bending from the first-1 flow path (110) and extending downward in a vertical direction, then bending again in a one-sided direction and extending, then bending again in a vertical direction and extending, then bending again in a other-sided direction and extending, and the flow path is formed in a shape that is repeatedly provided downward in a vertical direction with the above shape. Based on FIG. 2, 'one side' refers to the direction from right to left, and 'the other side' refers to the direction from left to right.

[0032] At this time, it is preferable that the first-1 flow path (110) and the first-2 flow path (120) be spaced apart from each other at a predetermined distance as shown in FIG. 2. This is to secure a space for the suction part to be coupled, which will be described later.

[0033] A refrigerant (2) circulates in the flow path (100). More specifically, the refrigerant (2) is introduced into the first flow path (110) from outside the case section (10), travels along the first flow path (110) from the bottom to the top of the case section (10), then travels along the first flow path (120) from the top to the bottom of the case section (10) and is discharged to the outside of the case section (10). The arrows shown in FIG. 2 represent the movement of the refrigerant (2).

[0035] Thus, according to the present invention, the zigzag shape of the flow path section (100) within the area of ​​the limited case section (10) has the advantage of increasing the heat exchange area capable of removing reaction heat. More specifically, since the area in contact with the refrigerant (2) within the flow path section (100) is maximized, the reaction heat generated during the process of absorbing hydrogen into the solid adsorption material described later can be quickly removed, making reaction heat management easy. Consequently, there is an advantage of increasing the reaction rate of hydrogen adsorption into the adsorption material.

[0037] At this time, a first auxiliary flow path is formed on the outer surface of the first flow path. More specifically, a first-1 auxiliary flow path (111) is formed on the outer surface of the first-1 flow path (110), and a first-2 auxiliary flow path (121) is also formed on the outer surface of the first-2 flow path (120).

[0038] FIG. 4 is an enlarged view of the first-1 auxiliary flow path, wherein the first-1 auxiliary flow path (111) is formed along the length direction of the outer surface of the first-1 flow path (110) and refrigerant flows inside. Accordingly, just as the refrigerant introduced along the first-1 flow path (110) is discharged to the outside of the case part (10) along the first-2 flow path (120) as described above, the refrigerant introduced along the first-1 auxiliary flow path (111) is discharged to the outside of the case part (10) along the first-2 auxiliary flow path (121).

[0039] At this time, it is preferable that the cross-sectional area of ​​the first auxiliary flow path be smaller than that of the first flow path. Since the main refrigerant is transported through the first flow path and the refrigerant flowing through the first auxiliary flow path literally plays an auxiliary role, increasing the size of the first auxiliary flow path would result in increased costs, and the adsorption section to be described later would inevitably become oversized, and there would be a problem of having to secure a minimum space for the adsorption section to be coupled beyond what is necessary. In addition, this applies equally to the second auxiliary flow path to be described later, as well as to the first auxiliary flow path.

[0041] Again, referring to FIG. 3, the second Euro section (200) has the same structure as the first Euro section (100).

[0042] The second Euro section (200) includes the second-1 Euro section (210) and the second-2 Euro section (220), just like the first Euro section (100).

[0043] The other end of the 2-1 flow path section (210) is connected to the first end of the 2-2 flow path section (220). The 2-2 flow path section (220) is formed by bending the 2-1 flow path section (210) to extend downward in a vertical direction, then bending it again in one direction to extend it, then bending it again in a downward vertical direction to extend it, then bending it again in the other direction to extend it, and the flow path is formed in a shape that is repeatedly provided downward in a vertical direction with the above shape.

[0044] At this time, it is preferable that the 2-1 flow path (210) and the 2-2 flow path (220) be spaced apart from each other at a predetermined distance. This is to secure a space for the suction part to be joined, which will be described later.

[0046] At this time, the second Euro section (200) has the same structure as the first Euro section (100) but is arranged to intersect with the first Euro section (100).

[0047] More specifically, when the first flow path (100) is formed to extend along the x-axis and z-axis, the second flow path (200) is formed to extend along the y-axis and z-axis. Preferably, the first flow path (100) and the second flow path (200) are arranged to be orthogonal when viewed from a plane.

[0048] Due to the shape described above, the heat exchange area is increased compared to one embodiment, resulting in an effect of further increasing the reaction heat removal efficiency. Consequently, there is an advantage in that the reaction rate of hydrogen adsorption by the adsorption material can be further increased.

[0050] Additionally, it is preferable that the first flow path (100) and the second flow path (200) be arranged in such a way that one of the second flow paths (200) extending in one or the other direction is inserted between two adjacent first flow paths (100) extending in one or the other direction among a plurality of first flow paths (100) extending in one or the other direction.

[0051] As described above, due to the shape in which one flow path is inserted into the space formed by the bent portion of one flow path, the heat exchange area is maximized, while the area occupied by the flow path (100, 200) itself within the case (10) is minimized, thereby having the advantage of forming a compact hydrogen storage device.

[0053] In the same principle as the first auxiliary flow path, a second auxiliary flow path is formed in the second flow path (200).

[0054] More specifically, a second-1 auxiliary flow path (211) is formed on the outer surface of the second-1 flow path (210), and a second-2 auxiliary flow path (221) is also formed on the outer surface of the second-2 flow path (220) (see FIG. 3).

[0055] The second-1 auxiliary flow path (211) is formed along the length direction of the outer surface of the second flow path (110), and refrigerant flows through it. Accordingly, by the same principle, just as the refrigerant introduced along the second-1 flow path (210) is discharged to the outside of the case section (10) along the second-2 flow path (220), the refrigerant introduced along the second-1 auxiliary flow path (211) is discharged to the outside of the case section (10) along the second-2 auxiliary flow path (221).

[0056] In addition, corresponding to the cross arrangement of the first Euro section (100) and the second Euro section (200) described above, the first auxiliary Euro section and the second auxiliary Euro section are also cross-arranged.

[0058] FIG. 5 illustrates a cross-section of the absorption unit according to the present invention. Hereinafter, with reference to FIG. 5, the configuration and effects of the absorption unit according to the present invention will be explained.

[0059] The absorption unit according to the present invention includes a housing unit (300), and an absorption material (400) is received in the housing unit (300).

[0060] The housing portion (300) is coupled to the flow path portion in a shape that penetrates the flow path portion and the auxiliary flow path portion (for convenience of explanation, the following description is based on the first flow path portion (100), and the same applies to the second flow path portion (200)),

[0061] In this way, the housing part (300) is combined in a shape that surrounds the flow path part and the auxiliary flow path part, so that the reaction heat generated during the process of the adsorbent material (400) adsorbing hydrogen can be rapidly removed through the refrigerant (2) flowing through the flow path part and the auxiliary flow path part, thereby maximizing the adsorption performance.

[0062] Additionally, it is preferable that multiple housing portions (300) be formed and can be continuously connected along the flow path.

[0063] The housing portion (300) includes a first housing portion (310) and a second housing portion (320), and it is preferable that the first housing portion (310) and the second housing portion (320) be designed to be mutually connectable and detachable. As a result, the housing portion (300) can be easily connected and detached at a desired location in the fluid section, thereby maximizing work efficiency.

[0065] Additionally, a groove is formed in the center of the first housing part (310), having a semicircular cross-section and extending in the longitudinal direction, and a groove is formed in the center of the second housing part (320), having a semicircular cross-section and extending in the longitudinal direction, at a position complementary thereto. Each groove comes into contact with the outer surface of the flow channel part (100), and as a result, when the first housing part (310) and the second housing part (320) are combined, a hollow part (330) extending in the longitudinal direction is formed.

[0066] At this time, an auxiliary groove (331) is formed that is recessed upward from the groove formed in the first housing part (310), and this forms a complementary shape that contacts and wraps with the outer surface of the auxiliary fluid section. As a result, the auxiliary fluid section is coupled as if fitted into the protruding auxiliary groove (331), thereby forming a structure similar to a guide being coupled to a guide groove, which has the effect of improving the coupling force between the housing part (300), the fluid section, and the auxiliary fluid section.

[0068] A groove portion (301) is formed on the outer surface of the housing portion (300). The groove portion (301) is formed along the longitudinal direction on the outer surface of the housing portion (300) and is formed by being recessed in the central direction as shown in FIG. 5. Additionally, an absorbent material is received in the recessed groove portion (301), and it is preferable that the absorbent material be a bar-shaped solid absorbent material (400) corresponding to the shape of the groove portion (301).

[0069] Solid hydrogen storage devices generally use solid adsorbents in powder form. While using powdered solid adsorbents offers the advantage of easy management due to high design flexibility, there is a limitation in the capacity of hydrogen that can be stored due to their low density.

[0070] Accordingly, the present invention utilizes a solid absorbent material (400) in a compressed lump form rather than a solid absorbent material in powder form. The issue of design freedom is overcome through a detachable housing part (300), and there is an advantage in that the hydrogen storage capacity can be maximized.

[0071] In addition, the solid absorbent material compressed into a lump shape is manufactured into a bar shape and joined by inserting it along the length direction of the groove portion (301), thereby minimizing the possibility of the solid absorbent material (400) detaching from the housing portion (300) and maximizing the contact area between the hydrogen and the solid absorbent material (400), which has the advantage of maximizing hydrogen storage efficiency.

[0072] The solid adsorbent material (400) is in the form of a solid compound capable of adsorbing or desorbing hydrogen, such as LaNi6H6, Mg2FeH6, etc.

[0074] FIG. 6 illustrates a housing portion according to another embodiment of the present invention.

[0075] In another embodiment of the present invention, a housing portion (300) has a first projection (311) formed on the side of a first housing portion (310) and a second projection (321) formed on the side of a second housing portion (320). The first projection (311) and the second projection (321) are formed to extend in the longitudinal direction along the housing portion (300) and protrude from the side of the housing portion (300), and it is preferable that the first projection (311) and the second projection (321) have a shape that is bent in a direction facing each other.

[0076] At this time, a bracket part (500) can be coupled to the space formed by the first protrusion (311) and the second protrusion (321), and more specifically, the bracket part (500) is coupled in a shape that is inserted into the space by sliding it.

[0077] In the process of combining the first housing part (310) and the second housing part (320) to surround the fluid section and the auxiliary fluid section, the two separated components are combined, so distortion may occur. As a result, there is a problem in that cold air escapes through the gap created by the distortion, reducing the efficiency of removing reaction heat.

[0078] Accordingly, through the configuration of a bracket part (500) that simultaneously fixes the sides of the first housing part (310) and the second housing part (320), and a first projection (311) and a second projection (321) to which the bracket part (500) is slidably coupled, the first housing part (310) and the second housing part (320) minimize twisting while encircling and coupled the flow path part and the auxiliary flow path part, thereby maximizing heat removal efficiency and minimizing refrigerant loss.

[0080] FIG. 7 illustrates a housing portion according to another embodiment of the present invention.

[0081] According to another embodiment of the present invention, the housing portion is formed with an auxiliary groove portion (3011) extending along the length direction at one point of the recessed groove portion (301) and at another point facing the one point in the width direction. At this time, it is preferable that a cover portion (600) is slidably coupled to the auxiliary groove portion (3011).

[0083] According to one embodiment or another embodiment, when the absorbent material (400) is combined, it may often detach during operation. However, the cover portion (600) according to another embodiment of the present invention is formed in the shape of a bar and is positioned above the vertically positioned absorbent material (400) contained therein, thereby acting as a cover and having the advantage of minimizing the detachment of the absorbent material (400).

[0084] At this time, there is a possibility that the cover portion (600) may hinder the absorption of hydrogen in the absorption material (400). Therefore, the cover portion (600) has a plurality of first frames (610) formed extending in the width direction and second frames (620) formed extending in the length direction, which intersect each other, and a plurality of hollow portions (630) that penetrate except at the intersecting points are formed to form a flow path so as not to hinder hydrogen absorption. Explanation of the symbols

[0085] 100 : 1st Eurozone, 200 : 2nd Eurozone, 300 : Housing part, 400 : Solid absorbent material.

Claims

Claim 1 A case portion into which hydrogen is introduced; a flow path portion located inside the case portion, through which refrigerant flows; and an adsorption portion coupled to the outer surface of the above-mentioned flow path; wherein the adsorption portion is coupled with a bar-shaped solid adsorption material in which hydrogen is adsorbed and desorbed, and an auxiliary flow path portion is coupled in which a refrigerant flows along the outer surface of the above-mentioned flow path, wherein the auxiliary flow path portion is formed along the outer surface of the above-mentioned flow path portion and has a cross-sectional area smaller than that of the above-mentioned flow path portion, and the adsorption portion includes a housing portion through which the above-mentioned flow path portion and the auxiliary flow path portion penetrate the center, and the adsorption material is received in the housing portion, and on the outer surface of the housing portion, a groove portion is formed extending along the longitudinal direction of the housing portion and is recessed toward the center, and the bar-shaped solid adsorption material is received in the groove portion, wherein the above-mentioned flow path portion is formed in a zigzag shape within the area of ​​the case portion, and the above-mentioned flow path portion includes a first flow path portion and a second flow path portion, wherein the first flow path portion and the second flow path portion are arranged to be orthogonal when viewed from a planar view, and the housing portion includes a first housing portion and a second housing portion, and the first housing portion and the second housing portion are coupled to each other A first projection is formed on the side of the first housing portion and a second projection is formed on the side of the second housing portion, and a bracket portion is coupled to the space formed by the first projection and the second projection, and the housing portion is coupled to the fluid passage portion so as to be separable from the fluid passage portion and the auxiliary fluid passage portion, and the first projection and the second projection are formed extending in the longitudinal direction of the first housing portion and the second housing portion, but are bent in a mutually facing direction to form the space, and the bracket portion is inserted into the space in a sliding manner to fix the sides of the first housing portion and the second housing portion, thereby preventing twisting from occurring while the first housing portion and the second housing portion are wrapped and coupled to the fluid passage portion and the auxiliary fluid passage portion, thereby reducing cold air loss through the spaced-apart space.A groove is formed on the inner surface of the housing portion that contacts the outer surface of the flow path portion, and an auxiliary groove is further formed that is recessed upward from the groove, so that the auxiliary flow path portion coupled to the outer surface of the flow path portion is coupled as if fitted into the auxiliary groove, thereby forming a structure similar to a guide being coupled to a guide groove, which increases the coupling force of the housing portion; the first flow path portion and the second flow path portion are arranged to be orthogonal to each other, and the second flow path portion is arranged in a shape such that it is inserted into the space formed by the bent portion of the first flow path portion, so as to reduce the area occupied within the case portion while increasing the heat exchange area with the refrigerant; the bar-shaped solid adsorption material is compressed into a lump form and fitted and coupled along the longitudinal direction of the groove portion, thereby minimizing the possibility of detachment from the housing portion and securing the area in contact with hydrogen, thereby removing the reaction heat generated during the hydrogen adsorption process through the refrigerant flowing through the flow path portion and the auxiliary flow path portion to secure the hydrogen adsorption reaction rate; a plurality of housing portions are arranged continuously along the flow path portion, and on the outer surface of the housing portion, the A hydrogen storage device using a solid adsorbent with an increased heat exchange area, wherein an auxiliary groove is further formed extending along the length direction of the housing at one point of the groove and at another point facing the one point in the width direction, and a bar-shaped cover is slidably coupled to the auxiliary groove, the cover is formed such that a plurality of first frames extending in the width direction and a plurality of second frames extending in the length direction intersect each other, and a plurality of hollow portions through which hydrogen passes are formed in an area other than the intersecting point of the first frame and the second frame, so that the cover prevents the bar-shaped solid adsorbent from escaping while not hindering the inflow of hydrogen to the bar-shaped solid adsorbent. 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