A metal hydride hydrogen storage device with balanced heat exchange

Abstract

The invention relates to the technical field of metal hydride hydrogen storage. The invention discloses a metal hydride hydrogen storage device with efficient and balanced heat exchange, comprising an outer shell and a protective cover arranged at the top of the outer shell. A hydrogen storage bottle body is arranged inside the outer shell. A water inlet and a water outlet are respectively arranged at the upper and lower ends of the outer wall of the outer shell. A heat conducting plate with a spiral structure is fixedly installed on the outer wall surface of the hydrogen storage bottle body, and a circulating water channel is formed between two upper and lower adjacent heat conducting plates. The invention provides a heat conducting plate with a spiral structure, so that circulating water can absorb heat on the surface of the hydrogen storage bottle body and the surface of the heat conducting plate during the flow in the circulating water channel, and can effectively increase the heat exchange area of ​​the hydrogen storage bottle body. Since the circulating water channel also has a spiral structure, the travel of the circulating water in the metal hydride hydrogen storage device can be increased, and the heat dissipation flow channel opened on the surface of the heat conducting plate can also make the heat conducting plate have a higher surface heat transfer coefficient, further improving the heat exchange effect.

Description

Technical Field

[0001] The invention relates to the technical field of metal hydride hydrogen storage, in particular to a metal hydride hydrogen storage device with balanced heat exchange. Background Art

[0002] Hydrogen fuel cells use hydrogen as fuel, which requires a stable and reliable hydrogen source. Metal hydride hydrogen storage uses the reaction between hydrogen and hydrogen storage alloys to achieve hydrogen storage. Compared with other hydrogen storage methods, it has the advantages of high volume hydrogen storage density, good safety, and high hydrogen purity. It is an ideal hydrogen source for hydrogen fuel cells.

[0003] Since hydrogen storage materials need to absorb a large amount of heat when dehydrogenating, for example, LaNi5 hydrogen storage alloy has a dehydrogenation enthalpy change of 31 kJ / molH2. When a metal hydride hydrogen storage device made of LaNi5 alloy dehydrogenates without external heating or with very low heating efficiency, its internal temperature will drop sharply to below -15°C, resulting in a decrease in the dehydrogenation equilibrium pressure of the hydrogen storage alloy, reducing its dehydrogenation rate or even stopping dehydrogenation. In order to ensure the dehydrogenation performance of the metal hydride hydrogen storage device, the heat exchange capacity and heat exchange uniformity of the hydrogen storage device should be improved.

[0004] However, the heat exchange structure of traditional metal hydride hydrogen storage devices on the market is difficult to ensure the uniformity of heat exchange of the hydrogen storage bottle when in use, resulting in different temperatures in various parts of the hydrogen storage bottle, which will affect the hydrogen release rate of the hydrogen storage device. Summary of the invention

[0005] The purpose of the present invention is to provide a metal hydride hydrogen storage device with balanced heat exchange, so as to solve the problem that the heat exchange structure of the traditional metal hydride hydrogen storage device is difficult to ensure the uniformity of heat exchange of the hydrogen storage bottle when in use, resulting in different temperatures at various parts of the hydrogen storage bottle, which will affect the hydrogen release rate of the hydrogen storage device.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a metal hydride hydrogen storage device with balanced heat exchange, comprising an outer shell and a protective cover arranged at the top of the outer shell, a hydrogen storage bottle body is arranged inside the outer shell, a water inlet and a water outlet are respectively arranged at the upper and lower ends of the outer wall of the outer shell, a heat conduction plate with a spiral structure is fixedly installed on the outer wall surface of the hydrogen storage bottle body, a circulating water channel is formed between two adjacent upper and lower heat conduction plates, and a heat dissipation channel is opened on the surface of the heat conduction plate from the head to the tail.

[0007] Preferably, it also includes:

[0008] A cover plate, a plurality of heat dissipation fins are fixedly mounted on the top surface of the cover plate, and a through hole is provided on the surface of the cover plate for the mouth of the hydrogen storage bottle to pass through;

[0009] Wherein, the cover plate is arranged between the shell and the protective cover.

[0010] Preferably, a lower sealing plate is fixedly installed on the top of the shell, an adjusting ring is rotatably installed on the outer wall surface of the lower sealing plate, a plurality of hidden holes are provided on the inner wall surface of the adjusting ring, a slot is provided on the surface of the lower sealing plate, a plurality of ball grooves are provided on the inner wall surface of the slot along the circumferential direction, balls are arranged inside the ball grooves, an upper sealing plate is fixedly installed on the bottom end surface of the protective cover, an insert block matching the slot is fixedly installed at the edge of the outer wall of the upper sealing plate, a plurality of locking holes matching the balls are provided on the outer wall surface of the insert block along the circumferential direction.

[0011] Preferably, the interior of the hydrogen storage bottle is filled with a hydrogen storage alloy, an air guide tube is fixedly installed inside the hydrogen storage bottle, a bottle mouth joint is plugged into the bottle mouth of the hydrogen storage bottle, and a hydrogen pipeline is fixedly installed inside the bottle mouth joint.

[0012] Preferably, it also includes:

[0013] Fans, the fans are provided in a plurality;

[0014] Wherein, the fan is fixedly installed on the outer surface of the protective cover.

[0015] Preferably, it also includes:

[0016] A valve, wherein the valve is fixedly connected to the hydrogen pipeline;

[0017] Wherein, the valve is fixedly installed on the top surface of the protective cover.

[0018] Preferably, clamping plates are fixedly installed at the upper and lower ends of the cover plate near the edges, and a compression sleeve is fixedly installed at the through hole on the bottom surface of the cover plate.

[0019] Preferably, limit rings are fixedly installed on the outer wall surface of the lower sealing plate at both sides of the adjustment ring.

[0020] Preferably, the outer wall of the heat conducting plate fits closely to the inner wall of the outer shell.

[0021] Preferably, the cross-section of the heat dissipation channel is a triangular structure.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The present invention provides a heat conducting plate with a spiral structure, and a circulating water channel is formed between two upper and lower adjacent heat conducting plates, so that the circulating water directly enters the circulating water channel from the water inlet, and then is discharged from the water outlet along the circulating water channel. The circulating water can absorb the heat on the surface of the hydrogen storage bottle and the heat on the surface of the heat conducting plate during the flow in the circulating water channel, which can effectively increase the heat exchange area of ​​the hydrogen storage bottle. Since the circulating water channel also has a spiral structure, the stroke of the circulating water in the metal hydride hydrogen storage device can be increased, and the heat dissipation flow channel opened on the surface of the heat conducting plate can also make the heat conducting plate have a higher surface heat transfer coefficient, further improving the heat exchange effect. Since the circulating water channel is arranged around the outside of the hydrogen storage bottle, the circulating water can flow along the outside of the hydrogen storage bottle, ensuring the heat exchange uniformity of each part of the hydrogen storage bottle, and having a better heat exchange effect than the existing metal hydride hydrogen storage device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of the metal hydride hydrogen storage device with balanced heat exchange of the present invention;

[0025] Figure 2 This is a schematic diagram of the internal structure of the metal hydride hydrogen storage device with balanced heat exchange according to the present invention;

[0026] Figure 3 This is a schematic diagram of the structure of the hydrogen storage bottle of the metal hydride hydrogen storage device with balanced heat exchange of the present invention;

[0027] Figure 4 It is a front view of the hydrogen storage bottle of the metal hydride hydrogen storage device with balanced heat exchange of the present invention;

[0028] Figure 5 for Figure 2 Schematic diagram of the local enlarged structure in;

[0029] Figure 6 for Figure 5 Schematic diagram of the enlarged structure of part A in the middle.

[0030] Figure 7 This is a schematic diagram of the cover plate structure of the metal hydride hydrogen storage device with balanced heat exchange of the present invention.

[0031] In the figure: 10-housing; 11-lower sealing plate; 12-ball groove; 13-ball; 14-adjusting ring; 15-limiting ring; 20-protective cover; 21-upper sealing plate; 22-locking hole; 30-water inlet; 40-water outlet; 50-valve; 60-hydrogen storage bottle; 61-air guide tube; 62-heat conduction plate; 63-heat dissipation channel; 64-bottle mouth connector; 65-hydrogen pipeline; 70-cover plate; 71-heat dissipation fins; 72-card plate; 73-compression sleeve; 80-fan. DETAILED DESCRIPTION

[0032] The embodiments of the present invention are further described below in conjunction with the accompanying drawings: Embodiment 1:

[0033] See also Figure 1-Figure 7 The present invention provides a technical solution: a metal hydride hydrogen storage device with balanced heat exchange, comprising a shell 10, a protective cover 20, a valve 50, a cover plate 70 and four fans 80, the protective cover 20 is arranged at the top of the shell 10, the valve 50 is fixedly installed on the top surface of the protective cover 20, the fan 80 is fixedly installed on the outer surface of the protective cover 20, and the fan 80 is used to discharge the heat in the protective cover 20, a hydrogen storage bottle 60 is fixedly installed inside the shell 10, and a water inlet 30 and a water outlet 40 are respectively fixedly installed at the upper and lower ends of the outer wall of the shell 10, the water inlet 30 is used to inject 45°C circulating water into the shell 10, and the water outlet 40 is used to discharge the circulating water after heat exchange, and a heat conducting plate 62 with a spiral structure is fixedly installed on the outer wall surface of the hydrogen storage bottle 60. In addition, according to an embodiment of the present invention, the heat conducting plate 62 is made of stainless steel, which has good thermal conductivity, high strength, good stamping performance, and is not easy to oxidize. The thickness of the heat conducting plate 62 is 3mm, which improves the thermal conductivity efficiency of the heat conducting plate 62. The outer wall of the heat conducting plate 62 fits with the inner wall of the housing 10, so that the circulating water can only move in a spiral state through the circulating water channel. Figure 3 As shown, a circulating water channel is formed between two upper and lower adjacent heat conducting plates 62, and the circulating water channel is used for the flow of circulating water. Figure 2 As shown, a heat dissipation channel 63 is provided on the surface of the heat conducting plate 62 from the head to the tail, and the depth of the heat dissipation channel 63 is 2 mm.

[0034] In addition, according to an embodiment of the present invention, the hydrogen storage bottle body 60 is an aluminum alloy seamless bottle with an outer diameter of 50 mm, a straight tube length of 300 mm, a water capacity of 450 ml, and is filled with 2 kg of LaNi5-xCox hydrogen storage alloy; a gas guide tube 61 with a diameter of 6 mm is provided at the center.

[0035] See also Figure 7 In the preferred technical solution of the present embodiment, the cover plate 70 is arranged between the outer shell 10 and the protective cover 20, and a plurality of heat dissipation fins 71 are fixedly installed on the top surface of the cover plate 70. A through hole is opened on the surface of the cover plate 70 for the mouth of the hydrogen storage bottle body 60 to pass through. The cover plate 70 can separate the outer shell 10 and the protective cover 20 to prevent the circulating water from entering the protective cover 20. At the same time, the circulating water near the top of the outer shell 10 will also contact the cover plate 70, and then be transmitted to the heat dissipation fins 71, and then the heat is dissipated into the protective cover 20, and finally discharged by the fan 80, which can further improve the thermal conductivity of the device.

[0036] See also Figure 2In the preferred technical solution of the present embodiment, the interior of the hydrogen storage bottle 60 is filled with a hydrogen storage alloy, an air guide tube 61 is fixedly installed inside the hydrogen storage bottle 60, a bottle mouth connector 64 is inserted at the bottle mouth of the hydrogen storage bottle 60, a hydrogen pipeline 65 is fixedly installed inside the bottle mouth connector 64, and the valve 50 and the hydrogen pipeline 65 are fixedly connected.

[0037] See also Figure 5 In the preferred technical solution of the present embodiment, card plates 72 are fixedly installed near the edges at the upper and lower ends of the cover plate 70, and card grooves compatible with the card plates 72 are opened on the surfaces of the lower sealing plate 11 and the upper sealing plate 21. Before installation, the card plate 72 on the cover plate 70 is first inserted into the card groove of the lower sealing plate 11, and then the card groove of the upper sealing plate 21 is aligned with the card plate 72, and then the lower sealing plate 11 and the upper sealing plate 21 are fixed. A compression sleeve 73 is fixedly installed at the through hole on the bottom end surface of the cover plate 70. The compression sleeve 73 has a conical structure, and the inner wall of the compression sleeve 73 fits the outer wall of the hydrogen storage bottle body 60. The hydrogen storage bottle body 60 can be compressed and fixed by the compression sleeve 73.

[0038] See also Figure 3 In the preferred technical solution of this embodiment, the cross-section of the heat dissipation channel 63 is a triangular structure, which can increase the flow rate of the medium in the heat dissipation channel 63. The higher the flow rate of the medium in the heat dissipation channel 63, the greater the surface heat transfer coefficient.

[0039] In summary of the above embodiments, the present invention provides a heat conducting plate with a spiral structure, and a circulating water channel is formed between two adjacent heat conducting plates 62 above and below, so that the circulating water directly enters the circulating water channel from the water inlet 30, and then is discharged from the water outlet 40 along the circulating water channel. The circulating water can absorb the heat on the surface of the hydrogen storage bottle 60 and the heat on the surface of the heat conducting plate 62 during the flow in the circulating water channel, which can effectively increase the heat exchange area of ​​the hydrogen storage bottle 60. Since the circulating water channel also has a spiral structure, the travel of the circulating water in the metal hydride hydrogen storage device can be increased, and the heat dissipation channel 63 opened on the surface of the heat conducting plate 62 can also make the heat conducting plate 62 have a higher surface heat transfer coefficient, further improving the heat exchange effect. Since the circulating water channel is arranged around the outside of the hydrogen storage bottle 60, the circulating water can flow along the outside of the hydrogen storage bottle 60, ensuring the heat exchange uniformity of each part of the hydrogen storage bottle, and has a better heat exchange effect than the existing metal hydride hydrogen storage device.

[0040] Embodiment 2:

[0041] See also Figure 6The present invention provides a technical solution: a metal hydride hydrogen storage device with balanced heat exchange, comprising a shell 10, a protective cover 20, a valve 50, a cover plate 70 and four fans 80, the protective cover 20 is arranged at the top of the shell 10, the valve 50 is fixedly installed on the top surface of the protective cover 20, the fan 80 is fixedly installed on the outer surface of the protective cover 20, and the fan 80 is used to discharge the heat in the protective cover 20, a hydrogen storage bottle 60 is fixedly installed inside the shell 10, and a water inlet 30 and a water outlet 40 are respectively fixedly installed at the upper and lower ends of the outer wall of the shell 10, the water inlet 30 is used to inject 45°C circulating water into the shell 10, and the water outlet 40 is used to discharge the circulating water after heat exchange, and a heat conducting plate 62 with a spiral structure is fixedly installed on the outer wall surface of the hydrogen storage bottle 60. In addition, according to an embodiment of the present invention, the heat conducting plate 62 is made of stainless steel, which has good thermal conductivity, high strength, good stamping performance, and is not easy to oxidize. The thickness of the heat conducting plate 62 is 3mm, which improves the thermal conductivity efficiency of the heat conducting plate 62. The outer wall of the heat conducting plate 62 fits with the inner wall of the housing 10, so that the circulating water can only move in a spiral state through the circulating water channel. Figure 3 As shown, a circulating water channel is formed between two upper and lower adjacent heat conducting plates 62, and the circulating water channel is used for the flow of circulating water. Figure 2 As shown, a heat dissipation channel 63 is provided on the surface of the heat conducting plate 62 from the head to the tail, and the depth of the heat dissipation channel 63 is 2 mm.

[0042] See also Figure 6 In the preferred technical solution of the present embodiment, a lower sealing plate 11 is fixedly installed on the top of the shell 10, an adjusting ring 14 is rotatably installed on the outer wall surface of the lower sealing plate 11, a plurality of hidden holes are provided on the inner wall surface of the adjusting ring 14, and the hidden holes are used to hide the ball 13 so that the ball 13 loses the squeezing force of the inner wall of the adjusting ring 14; a slot is provided on the surface of the lower sealing plate 11, a plurality of ball grooves 12 are provided on the inner wall surface of the slot along the circumferential direction, and the ball 13 is rollingly installed inside the ball groove 12; an upper sealing plate 21 is fixedly installed on the bottom end surface of the protective cover 20, and an insert block matching the slot is fixedly installed at the edge of the outer wall of the upper sealing plate 21, and a plurality of locking holes 22 matching the ball 13 are provided on the outer wall surface of the insert block along the circumferential direction.

[0043] Furthermore, when installing the protective cover 20, the plug is inserted into the slot, and then the adjusting ring 14 is rotated to make the hidden hole and the ball groove 12 staggered with each other. At this time, the ball 13 will be stuck in the locking hole 22 under the pressure of the inner wall of the adjusting ring 14, so that the protective cover 20 can be fixed in the shell 10. When disassembling the protective cover 20, it is only necessary to rotate the adjusting ring 14 to make the ball groove 12 and the hidden hole correspond to each other, so that the ball 13 will enter the hidden hole, and the ball 13 will lose the squeezing force of the inner wall of the adjusting ring 14, and then the protective cover 20 can be removed from the shell 10.

[0044] In addition, according to the embodiment of the present invention, the inner diameter of the opening of the ball groove 12 is smaller than the diameter of the ball 13 , which can effectively prevent the ball 13 from rolling out of the ball groove 12 .

[0045] See also Figure 1 In addition, according to an embodiment of the present invention, the outer wall of the adjusting ring 14 is inlaid with NO and OFF marks, and the surface of the protective cover 20 is coated with an indication mark. When the NO on the adjusting ring 14 corresponds to the indication mark, it indicates that the protective cover 20 can be opened. At this time, the hidden hole on the inner wall of the adjusting ring 14 corresponds to the ball 13, that is, the protective cover 20 can be removed from the outer shell 10. When the OFF on the adjusting ring 14 corresponds to the indication mark, it indicates that the protective cover 20 and the outer shell 10 are in a fixed state. At this time, the hidden hole on the inner wall of the adjusting ring 14 and the ball 13 are staggered with each other, that is, the protective cover 20 cannot be removed from the outer shell 10.

[0046] See also Figure 6 In the preferred technical solution of this embodiment, the outer wall surface of the lower sealing plate 11 is fixedly installed with a limit ring 15 on both sides of the adjusting ring 14. The limit ring 15 can improve the rotation stability of the adjusting ring 14, and the surface where the limit ring 15 and the adjusting ring 14 are in contact is provided with anti-slip teeth, which can increase the friction between the limit ring 15 and the adjusting ring 14. When there is no external force to rotate the adjusting ring 14, the adjusting ring 14 will not rotate.

[0047] In summary, when installing the protective cover 20, the plug is inserted into the slot, and then the adjusting ring 14 is rotated to make the hidden hole and the ball groove 12 staggered with each other. At this time, the ball 13 will be stuck in the locking hole 22 under the pressure of the inner wall of the adjusting ring 14, so that the protective cover 20 can be fixed in the shell 10. When disassembling the protective cover 20, it is only necessary to rotate the adjusting ring 14 to make the ball groove 12 and the hidden hole correspond to each other, so that the ball 13 will enter the hidden hole, and the ball 13 will lose the squeezing force of the inner wall of the adjusting ring 14, and then the protective cover 20 can be removed from the shell 10.

[0048] In the several embodiments provided by the present invention, it should be understood that the disclosed device can be implemented in other ways. The welding or threaded connection or winding connection shown or discussed can be completed with the assistance of equipment, such as welding with a welding gun, threaded connection with a wrench, etc. The materials of the device components are various, such as aluminum alloy, steel, copper and other metal materials, which are formed by casting or mechanical stamping.

Claims

1. A metal hydride hydrogen storage device with balanced heat exchange, comprising a housing (10) and a protective cover (20) arranged at the top of the housing (10), a hydrogen storage bottle (60) is arranged inside the housing (10), and a water inlet (30) and a water outlet (40) are respectively arranged at the upper and lower ends of the outer wall of the housing (10), characterized in that: A heat conducting plate (62) with a spiral structure is fixedly mounted on the outer wall surface of the hydrogen storage bottle body (60); a circulating water channel is formed between two adjacent heat conducting plates (62) above and below; and a heat dissipation channel (63) is provided on the surface of the heat conducting plate (62) from the head to the tail; A lower sealing plate (11) is fixedly mounted on the top of the housing (10), an adjusting ring (14) is rotatably mounted on the outer wall surface of the lower sealing plate (11), a plurality of hidden holes are provided on the inner wall surface of the adjusting ring (14), a slot is provided on the surface of the lower sealing plate (11), a plurality of ball grooves (12) are provided on the inner wall surface of the slot along the circumferential direction, balls (13) are arranged inside the ball grooves (12), an upper sealing plate (21) is fixedly mounted on the bottom end surface of the protective cover (20), an insert block matching the slot is fixedly mounted on the outer wall of the upper sealing plate (21) at the edge, a plurality of locking holes (22) matching the balls (13) are provided on the outer wall surface of the insert block along the circumferential direction; It also includes: a cover plate (70), a plurality of heat dissipation fins (71) being fixedly mounted on the top surface of the cover plate (70), and a through hole for the mouth of the hydrogen storage bottle body (60) to pass through is provided on the surface of the cover plate (70); Wherein, the cover plate (70) is arranged between the outer shell (10) and the protective cover (20); It also includes: a fan (80), wherein a plurality of fans (80) are provided; The fan (80) is fixedly mounted on the outer surface of the protective cover (20); Limiting rings (15) are fixedly mounted on the outer wall surface of the lower sealing plate (11) at both sides of the adjusting ring (14).

2. A metal hydride hydrogen storage device with balanced heat exchange according to claim 1, characterized in that: The hydrogen storage bottle (60) is filled with a hydrogen storage alloy, a gas guide tube (61) is fixedly installed inside the hydrogen storage bottle (60), a bottle mouth joint (64) is plugged into the bottle mouth of the hydrogen storage bottle (60), and a hydrogen pipeline (65) is fixedly installed inside the bottle mouth joint (64).

3. A metal hydride hydrogen storage device with balanced heat exchange according to claim 1, characterized in that: Also includes: A valve (50), wherein the valve (50) is fixedly connected to a hydrogen pipeline (65); The valve (50) is fixedly mounted on the top surface of the protective cover (20).

4. A metal hydride hydrogen storage device with balanced heat exchange according to claim 2, characterized in that: A clamping plate (72) is fixedly mounted on the upper and lower ends of the cover plate (70) near the edges, and a compression sleeve (73) is fixedly mounted on the bottom surface of the cover plate (70) at the through hole.

5. The metal hydride hydrogen storage device with balanced heat exchange according to claim 1, characterized in that: The outer wall of the heat conducting plate (62) is in contact with the inner wall of the outer shell (10).

6. A metal hydride hydrogen storage device with balanced heat exchange according to claim 1, characterized in that: The cross-section of the heat dissipation channel (63) is a triangular structure.

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