Hydrogen storage device for hydrogen fuel cell and use method

Abstract

The invention relates to a hydrogen storage device for a hydrogen fuel cell and a use method, the hydrogen storage device comprises an outer tank body, the inner wall of a middle tank body is fixedly connected with a refrigeration sheet, and a heat conduction plate is attached to the side of the refrigeration sheet; a heat conducting rod is arranged in the inner tank body, and the middle part of the heat conducting rod vertically extends between the middle tank body and the inner tank body; the connecting heat conduction assembly is installed on the heat conduction plate, the connecting heat conduction assembly stretches out and draws back in the middle of the heat conduction plate and is connected with the heat conduction rod, and the end of the connecting heat conduction assembly is connected with a connecting pipe; the two ends of the air inlet valve are connected with the connecting pipe and the inner tank body through conveying pipes 901 respectively. Pressure generated after liquid hydrogen is gasified is used for pushing the connecting heat conduction assembly to do telescopic motion, the temperature of the refrigeration piece is directly transmitted to the inner tank body, and therefore the cooling speed of the inner tank body is increased.

Description

Technical Field

[0001] The present invention relates to the field of hydrogen storage, and in particular to a hydrogen storage device for a hydrogen fuel cell and a use method thereof. Background Art

[0002] In the field of fuel cell vehicles, liquid hydrogen can be used as a clean and efficient alternative fuel that can provide longer driving range and shorter refueling time. With the advancement of fuel cell technology and the expansion of commercialization, liquid hydrogen is widely used in fuel cell vehicles, energy storage, aerospace and other fields. Liquid hydrogen storage tanks are equipment that cools hydrogen into liquid under low temperature conditions and stores liquid hydrogen in storage tanks. Storage tanks are generally made of stainless steel or aluminum, and use perfect insulation measures to ensure the long-term stability of stored hydrogen.

[0003] However, when liquid hydrogen is exposed to high temperature, its molecules will gain more heat energy and the interaction between molecules will weaken, making liquid hydrogen unstable and easier to vaporize. Therefore, in the high temperature environment in summer, the vaporization speed of liquid hydrogen may be accelerated. Summary of the invention

[0004] Purpose of the invention: To provide a hydrogen storage device and method for use of hydrogen fuel cells, by utilizing the pressure of liquid hydrogen when it is gasified to drive the connected heat-conducting components to work, and directly transfer the temperature of the refrigeration plate when it is working to the inner tank body through the heat-conducting rod, so that the inner tank body can be quickly cooled and the hydrogen can be liquefied again in time.

[0005] Technical solution: A hydrogen storage device for a hydrogen fuel cell includes an outer tank body, a middle tank body, a heat conducting plate, an inner tank body, a heat conducting rod, a connecting heat conducting component, a connecting pipe and an air intake valve.

[0006] The inner wall of the middle tank is fixedly connected with a refrigeration plate, and the side of the refrigeration plate is fitted with a heat conduction plate;

[0007] The inner tank body is provided with a heat-conducting rod inside, and the middle part of the heat-conducting rod vertically extends to between the middle tank body and the inner tank body;

[0008] A connecting heat-conducting component is installed on the heat-conducting plate, the connecting heat-conducting component moves telescopically in the middle of the heat-conducting plate and is connected to the heat-conducting rod, and a connecting pipe is connected to the end of the connecting heat-conducting component;

[0009] The air inlet valve has two ends connected to the connecting pipe and the inner tank body respectively through a delivery pipe 901.

[0010] When the internal pressure of the inner tank increases, the air inlet valve opens and the pressure is transmitted to the connecting pipe, providing a driving force for the connected heat-conducting component. The connected heat-conducting component receives the temperature transfer of the refrigeration plate through the heat-conducting plate, and then transfers the temperature to the heat-conducting rod in time through the connected heat-conducting component, thereby increasing the cooling speed of the inner tank.

[0011] In a further embodiment, the heat-conducting connection component includes an extension rod, a limiting plate and a rotating rod.

[0012] An extension rod extending from the inside of the air inlet pipe and vertically penetrating the middle of the heat conducting plate;

[0013] A limit plate is vertically fixed on the heat conducting plate, the limit plates are distributed on both sides of the extension rod, a limit end is provided at the end of the extension rod, and a displacement groove matching with the limit end is opened on the limit plate;

[0014] The rotating rod is rotatably connected in the middle, one end is rotatably connected to the limit end, and the other end is rotatably connected to the limit plate. A fixed port is provided at the end of the rotating rod, and the fixed port is matched with the end of the heat conducting rod.

[0015] The extension rod pushes the rotating rod to move relative to each other, and controls the connection state between the fixed port on the rotating rod and the heat-conducting rod. When the fixed port is connected to the heat-conducting rod, the temperature is transferred to the inner tank body in time, and the temperature is reduced in time.

[0016] In a further embodiment, a baffle is provided inside the connecting pipe, and the baffle extends obliquely from the outer edge of the connecting pipe toward the center and is close to the extension rod. When hydrogen enters the connecting pipe, the baffle controls its flow direction so that it is concentrated close to the extension plate to promote the movement of the extension plate.

[0017] In a further embodiment, a sealing groove is opened in the middle of the heat conducting plate, a sealing assembly is provided at the sealing groove, and the sealing assembly includes a telescopic spring, a dynamic ring and a sealing ring.

[0018] A telescopic spring fixedly connected to one side of the sealing groove;

[0019] A dynamic ring is fixed to the other side of the telescopic spring, and a sealing ring is buckled at the end of the dynamic ring, and the sealing ring is fitted with the outside of the extension rod.

[0020] In a further embodiment, the extension rod is provided with an extrusion end adapted to the sealing groove, the extrusion end fits against the inner wall of the sealing groove, the end of the extension rod is stepped, and a reverse telescopic member is fixed between the end and the inner wall of the outer tank body.

[0021] When the extension rod moves, the sealing ring shrinks due to the influence of temperature. After the extension rod is reset, the temperature inside the tank body recovers. The sealing ring is pushed by the extrusion end and is located inside the heat conduction plate. The sealing ring returns to its original state to prevent the temperature inside the middle tank body from leaking out.

[0022] In a further embodiment, the sealing groove port is provided with a U-shaped fixing groove, a compression spring is fixedly connected inside the U-shaped fixing groove, a ball is provided at the end of the compression spring, and limiting curved surfaces that fit with the ball surface are provided at both ends of the extrusion end.

[0023] The compression spring and ball combination are distributed on both sides of the extrusion end. When the extrusion end fits with the ball, the telescopic spring pushes the ball to fit with the limiting curved surface. Under the preload of the telescopic spring, the extension rod is limited and fixed to prevent the extension rod from being affected by the reverse telescopic part and shaking.

[0024] In a further embodiment, a heat conducting member is spirally wound around the outside of the inner tank along the length direction of the inner tank, and the heat conducting member is fixedly connected to the end of the heat conducting rod. The refrigeration sheet increases the working strength, and the heat conducting member is located between the outer tank and the inner tank, and works in combination with the heat conducting rod to transfer temperature to the inside and outside of the inner tank to ensure the cooling speed of the inner tank.

[0025] In a further embodiment, a shock absorbing assembly is provided between the outer tank body and the middle tank body, and the shock absorbing assembly includes a lower support frame, an upper support frame, a sleeve rod, a steel wire rope, a telescopic rod and a buffer spring.

[0026] A lower support frame, fixed to the inner wall of the outer tank, wherein the middle portion of the lower support frame is bent to form a triangular inclined surface;

[0027] An upper support frame supports the bottom of the middle tank body, a limited square hole is provided in the middle of the upper support frame, the bottom of the middle tank body is located in the limited square hole, and a rubber ring is fixed to the side edge of the limited square hole;

[0028] The sleeve rods are fixed on the upper support frame and the lower support frame, and the sleeve rods are provided with at least two groups, each group is distributed up and down;

[0029] A steel wire rope spirally passed through a group of the sleeve rods, and the steel wire rope is distributed on the triangular inclined surface;

[0030] The telescopic rod is vertically connected to the bottom of the outer tank body, the top of the telescopic rod is connected to the middle of the triangular inclined surface, and a buffer spring is sleeved on the outside of the telescopic rod, and the buffer spring is fixed between the outer tank body and the middle of the triangular inclined surface.

[0031] The buffer assembly provides buffering protection for the middle tank body and the inner tank body to prevent vibration during transportation from affecting the internal stability of the inner tank body.

[0032] In a further embodiment, a protective layer is provided between the outer wall of the connecting pipe and the inner wall of the outer tank body. The protective layer can be made of polymer materials such as polyethylene, polypropylene, etc., which have good heat insulation and anti-collision properties.

[0033] A method for using a hydrogen storage device for a hydrogen fuel cell comprises the following steps:

[0034] S1. Liquid hydrogen is stored inside the inner tank. When exposed to high temperature, the liquid hydrogen gasifies.

[0035] S2, the refrigeration plate works, the air inlet valve opens, and hydrogen enters the connecting pipe through the air inlet valve;

[0036] S3, the extension rod is pushed, and the fixed end of the rotating rod is connected to the heat conducting rod;

[0037] S4, the temperature of the cooling plate is transferred to the rotating rod through the heat conducting plate, and then to the heat conducting rod;

[0038] S5, until the hydrogen in the inner tank is liquefied again, the air inlet valve is closed, the rotating rod is disconnected, and the extension rod is reset.

[0039] Beneficial effects: The present invention relates to a hydrogen storage device for a hydrogen fuel cell and a method of use. The heat-conducting component is connected to push the extension rod through the pressure of the inner tank body, and the inner tank body is timely depressurized and protected. When the refrigeration plate is working, the temperature is directly transferred to the heat-conducting rod through the heat-conducting plate and the heat-conducting component. The heat-conducting rod is arranged inside the inner tank body to increase the speed of transferring the temperature to the inner tank body and timely reduce the temperature of the inner tank body. After the temperature of the inner tank body is stabilized, the heat-conducting component is disconnected from the heat-conducting rod, so that the temperature diffuses between the inner tank body and the middle tank body. The outer tank body is provided with an insulation layer to keep the internal temperature warm. The extension rod is automatically reset by the reverse telescopic member, and the extrusion end at the end of the extension rod pushes the sealing ring deep into the heat-conducting plate to prevent temperature leakage. When the extension plate is reset, the telescopic spring pushes the ball to fit with the extrusion end with a certain preload force to prevent the extension rod from telescoping and shaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the internal structure of the present invention.

[0041] Figure 2 It is a schematic diagram of the overall structure of the heat-conducting components connected in the present invention.

[0042] Figure 3 It is a schematic diagram of the overall structure of the heat-conducting components connected in the present invention.

[0043] Figure 4 It is a schematic diagram of the overall structure of the sealing component in the present invention.

[0044] Figure 5 It is a schematic diagram of the overall structure of the shock absorbing assembly in the present invention.

[0045] The reference numerals in the figure are: outer tank body 1, middle tank body 2, refrigeration plate 3, heat conduction plate 4, sealing groove 401, U-shaped fixing groove 402, inner tank body 5, heat conduction rod 6, connecting heat conduction component 7, extension rod 701, extrusion end 7011, limiting curved surface 7012, limiting plate 702, limiting end head 703, displacement groove 704, rotating rod 705, fixed port 706, connecting pipe 8, air intake valve 9, delivery pipe 901901, baffle 10, sealing component 11, telescopic spring 1101, dynamic ring 1102, sealing ring 1103, reverse telescopic part 12, compression spring 13, ball 14, heat conduction part 15, shock absorbing component 16, lower support frame 1601, upper support frame 1602, sleeve rod 1603, wire rope 1604, telescopic rod 1605, buffer spring 1606. DETAILED DESCRIPTION

[0046] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present invention. However, it is apparent to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features well known in the art are not described.

[0047] Reference Figures 1 to 2 As shown, the present invention provides a hydrogen storage device for a hydrogen fuel cell, comprising an outer tank body 1; a middle tank body 2 is arranged inside the outer tank body 1, a cooling plate 3 is fixedly connected to the inner wall of the middle tank body 2, and a heat conducting plate 4 is arranged on the side of the cooling plate 3; an inner tank body 5 is arranged inside the middle tank body 2, a heat conducting rod 6 is arranged inside the inner tank body 5, and the middle part of the heat conducting rod 6 vertically extends to between the middle tank body 2 and the inner tank body 5; a connecting heat conducting component 7 is installed on the heat conducting plate 4, the connecting heat conducting component 7 is telescopically movable in the middle part of the heat conducting plate 4, and is connected to the heat conducting rod 6, and the end of the connecting heat conducting component 7 is connected to a connecting pipe 8; the two ends of the air intake valve 9 are respectively connected to the connecting pipe 8 and the inner tank body 5 through a delivery pipe 901.

[0048] A delivery pipe 901 (only part of the delivery pipe is shown in the figure) is provided at the end of the inner tank body 5. One end of the delivery pipe 901 extends to the outside of the outer tank body 1 and is connected to the connecting pipe 8, and the other end extends into the inner tank body 5. Liquid hydrogen is delivered to the inner tank body 5 through the delivery pipe 901. Liquid hydrogen is stored inside the inner tank body 5. A cooling chamber is formed between the inner tank body 5 and the middle tank body 2, and a heat preservation chamber is formed between the middle tank body 2 and the outer tank body 1. When the refrigeration plate 3 is working, the connection heat conduction component 7 and the heat conduction rod 6 are in a disconnected state, and the heat conduction rod 6 transfers the temperature to the liquid hydrogen to reduce the temperature of the liquid hydrogen. When the liquid hydrogen inside the inner tank body 5 is heated and vaporized, the internal pressure of the inner tank body 5 increases, and the hydrogen enters the connecting pipe 8 along the delivery pipe 901 and the air inlet valve 9, pushing the connecting heat-conducting component 7 to extend and retract, and the connecting heat-conducting component 7 abuts against the heat-conducting rod 6, and the temperature is transferred to the heat-conducting rod 6 through the heat-conducting plate 4 and the connecting heat-conducting component 7, thereby reducing energy loss, increasing the temperature transfer speed of the heat-conducting rod 6, and increasing the cooling speed of the inner tank body 5.

[0049] The air inlet valve 9 adopts a two-way delivery type. When the temperature drops, the gasified hydrogen will flow back into the push box to form liquid hydrogen.

[0050] The air inlet valve 9 can be arranged inside or outside the tank body. When arranged outside, the delivery pipe 901 is coaxially connected with the connecting pipe 8 so that the hydrogen can push the extension rod 701. When the air inlet valve 9 is arranged inside the tank body, it is preferably arranged between the outer tank body 1 and the middle tank body 2, and the space between the outer tank body 1 and the middle tank body 2 is used to reduce the flow stroke of hydrogen.

[0051] Reference Figures 2 to 3 The heat-conducting component 7 is specifically provided with an extension rod 701, which extends vertically from the inside of the connecting pipe and passes through the middle of the heat-conducting plate 4; the limiting plate 702 is vertically fixed on the heat-conducting plate 4, and the limiting plates 702 are distributed on both sides of the extension rod 701. A limiting terminal 703 is provided at the end of the extension rod 701, and a displacement groove 704 matching the limiting terminal 703 is opened on the limiting plate 702; the middle part of the rotating rod 705 is rotatably connected, one end is rotatably connected to the limiting terminal 703, and the other end is rotatably connected to the limiting plate 702, and a fixed port 706 is opened at the end of the rotating rod 705, and the fixed port 706 is matched with the end of the heat-conducting rod 6.

[0052] A closed space is formed inside the connecting tube 8. When hydrogen enters the closed space, the hydrogen pushes the extension rod 701 to move, and the rotating rod 705 is rotationally connected to the extension rod 701, thereby driving the rotating rod 705 to move. The rotating rod 705 is bidirectionally symmetrically distributed around the central axis of the extension rod 701, and the fixed port 706 at the end of the rotating rod 705 moves relatively to be connected to the end of the heat conducting rod 6.

[0053] A baffle plate 10 is provided inside the connecting pipe 8, and the baffle plate 10 extends obliquely from the outer edge of the connecting pipe 8 toward the center and is close to the extension rod 701. When hydrogen enters the connecting pipe 8, it flows along the baffle plate 10, pushing the extension rod 701 in time, thereby improving the response efficiency.

[0054] Reference Figure 4 A sealing groove 401 is opened in the middle of the heat conducting plate 4, and a sealing assembly 11 is provided at the sealing groove 401. The sealing assembly 11 specifically includes a telescopic spring 1101, and the telescopic spring 1101 is fixedly connected to one side of the sealing groove 401; a dynamic ring 1102 is fixed to the other side of the telescopic spring 1101, and a sealing ring 1103 is snapped at the side end of the dynamic ring 1102, and the sealing ring 1103 is in contact with the outside of the extension rod 701.

[0055] The extension rod 701 is provided with an extrusion end 7011 adapted to the sealing groove 401 , the extrusion end 7011 is in contact with the inner wall of the sealing groove 401 , the end of the extension rod 701 is stepped, and a reverse telescopic member 12 is fixed between the end and the inner wall of the outer tank body 1 .

[0056] In the initial state, the top of the extension rod 701 is close to the inner wall of the outer tank body 1. When the extension rod 701 is pushed by hydrogen, the extrusion end 7011 is separated from the sealing groove 401, and the telescopic spring 1101 pushes the dynamic ring 1102 and the sealing ring 1103 to move, so that the sealing ring 1103 is further close to the cooling space. When the sealing ring 1103 moves to the port of the extrusion end 7011, the sealing ring 1103 is affected by the internal temperature of the cooling space, and the sealing ring 1103 shrinks and further fits closely with the extension rod 701, and the outer peripheral size is reduced. There is a gap between the extension rod 701 and the heat conducting plate 4, so that part of the hydrogen directly enters the cooling space, and the hydrogen is liquefied again to form liquid hydrogen, and adheres to the outer wall of the inner tank body 5, thereby increasing the cooling speed of the inner tank body 5.

[0057] After the inner tank 5 reaches a stable state, the refrigeration plate 3 reduces its working intensity, and the reverse telescopic member 12 promptly pulls the extension rod 701 to reset. The refrigeration plate 3 works for a period of time to ensure that the inner tank 5 is surrounded by a low-temperature space outside, and during transportation, the temperature loss rate inside the inner tank 5 is reduced. When the heat-conducting component 7 is disconnected from the heat-conducting rod 6 and the extrusion end 7011 of the extension rod 701 is located in the sealing groove 401, the sealing ring 1103 returns to its original state, and the extrusion end 7011 of the extension rod 701 pushes the sealing ring 1103 and the dynamic ring 1102 to compress the telescopic spring 1101, thereby achieving a sealing effect and preventing the temperature in the cooling space from leaking out.

[0058] A U-shaped fixing groove 402 is provided at the end of the sealing groove 401, and a compression spring 13 is fixedly connected inside the U-shaped fixing groove 402. A ball 14 is provided at the end of the compression spring 13, and limiting curved surfaces 7012 that fit with the surface of the ball 14 are provided at both ends of the extrusion end 7011.

[0059] Two-thirds of the ball 14 is located in the U-shaped fixed groove 402. When the extension rod 701 moves, the extrusion end 7011 pushes the ball 14 to squeeze the compression spring 13, and the limiting curved surface 7012 moves in accordance with the ball 14. The ball 14 changes with the size of the limiting curved surface 7012 and expands and contracts in the U-shaped fixed groove 402. When the extension rod 701 is reset, the reverse telescopic member 12 uses the telescopic spring 1101 to pull the extension rod 701, and the extrusion end 7011 of the extension rod 701 squeezes the ball 14. The ball 14 is in contact with the limiting curved surface 7012 and fits with the limiting curved surface 7012. The end of the extension rod 701 is limited and fixed by the ball 14, thereby preventing the reverse telescopic rod 1605 from driving the extension rod 701 to shake and affect the stability of temperature transfer.

[0060] The outer part of the inner tank body 5 is spirally surrounded by a heat conducting member 15 along the length direction of the inner tank body 5, and the heat conducting member 15 is fixedly connected to the end of the heat conducting rod 6. A certain distance is set between the heat conducting member 15 and the outer wall of the inner tank body 5, and the heat conducting member 15 surrounds the outer part of the inner tank body 5. When the extension rod 701 is connected to the heat conducting rod 6, the inner tank body 5 and the outer part are cooled at the same time, thereby improving the temperature transfer speed.

[0061] Reference Figure 5 A shock absorbing assembly 16 is provided between the outer tank body 1 and the middle tank body 2. The shock absorbing assembly 16 comprises: a lower support frame 1601, which is fixed to the inner wall of the outer tank body 1, and the middle part of the lower support frame 1601 is bent to form a triangular inclined surface; an upper support frame 1602, which supports the bottom of the middle tank body 2, and a limited square hole is provided in the middle part of the upper support frame 1602, and the bottom of the middle tank body 2 is located in the limited square hole, and a rubber ring is fixed to the side edge of the limited square hole; a sleeve rod 1603 is fixed to the upper support frame 1602 On the lower support frame 1601, at least two groups of sleeve rods 1603 are provided, each group is distributed up and down; the steel wire rope 1604 spirally passes through a group of sleeve rods 1603, and the steel wire rope 1604 is distributed on the triangular inclined surface; the telescopic rod 1605 is vertically connected to the bottom of the outer tank body 1, and the top of the telescopic rod 1605 is connected to the middle of the triangular inclined surface. The telescopic rod 1605 is sleeved with a buffer spring 1606 on the outside, and the buffer spring 1606 is fixed between the outer tank body 1 and the middle of the triangular inclined surface. The shock absorbing assembly 16 is distributed at the lower part of the middle tank body 2, and is staggered with the connecting pipe 8 at the upper part of the middle tank body 2, so that the upper and lower parts of the middle tank body 2 can be simultaneously limited and fixed. When the device is bumpy during transportation, the shock absorbing assembly 16 performs shock absorption protection on the middle tank body 2 and the inner tank body 5, maintains the stable state of the liquid hydrogen in the inner tank body 5, and prevents the liquid hydrogen from leaking or gasifying due to bumps and vibrations.

[0062] A protective layer is provided between the outer wall of the connecting pipe 8 and the inner wall of the outer tank body 1. The protective layer can be made of polymer materials such as polyethylene, polypropylene, etc., which have good heat insulation and anti-collision properties.

[0063] The present invention also provides a method for using a hydrogen storage device for a hydrogen fuel cell, and the specific operation is as follows: the inner tank body 5 stores liquid hydrogen, the refrigeration sheet 3 is installed on the inner wall of the middle tank body 2, and a cooling space is formed between the inner tank body 5 and the middle tank body 2. The inner wall of the outer tank body 1 is provided with a thermal insulation layer to ensure the temperature of the cooling space, and then ensure the internal temperature of the inner tank body 5. When in a high temperature environment, when the liquid hydrogen in the inner tank body 5 is heated and vaporized, the vaporization will cause the gas volume to expand significantly, thereby increasing the pressure of the hydrogen. The hydrogen flows along the delivery pipe 901, the air inlet valve 9 is opened, the hydrogen enters the connecting pipe 8, and pushes the extension rod 701 to move. At the same time, the refrigeration sheet 3 works, the rotating rod 705 is connected to the heat-conducting rod 6, and the temperature of the refrigeration sheet 3 is transmitted to the rotating rod 705 through the heat-conducting plate 4, and then transmitted to the heat-conducting rod 6, and the interior of the inner tank body 5 is quickly cooled. After the temperature of the inner tank 5 drops, the hydrogen is liquefied again. Affected by the temperature inside the inner tank 5, the hydrogen in the connecting pipe 8 flows back into the inner tank 5 to form liquid hydrogen, and the air inlet valve 9 is closed. The extension rod 701 is reset in the reverse direction, and the rotating rod 705 is disconnected from the heat-conducting rod 6. The refrigeration plate 3 continues to work for a period of time, and the heat-conducting rod 6 ensures a certain temperature in the cooling space, so that the inner tank 5 maintains a constant temperature within a certain time range, and the refrigeration plate 3 stops working.

[0064] As described above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the present invention itself. Various changes may be made to it in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. A hydrogen storage device for a hydrogen fuel cell, characterized in that: include: Outer tank; The inner wall of the middle tank is fixedly connected with a refrigeration plate, and the side of the refrigeration plate is fitted with a heat conduction plate; The inner tank body is provided with a heat-conducting rod inside, and the middle part of the heat-conducting rod vertically extends to between the middle tank body and the inner tank body; A connecting heat-conducting component is installed on the heat-conducting plate, the connecting heat-conducting component moves telescopically in the middle of the heat-conducting plate and is connected to the heat-conducting rod, and a connecting pipe is connected to the end of the connecting heat-conducting component; The air inlet valve has two ends connected to the connecting pipe and the inner tank body respectively through a delivery pipe 901.

2. The hydrogen storage device for a hydrogen fuel cell according to claim 1, characterized in that: The heat-conducting connection component comprises: An extension rod extending from the inside of the air inlet pipe and vertically penetrating the middle of the heat conducting plate; A limit plate is vertically fixed on the heat conducting plate, the limit plates are distributed on both sides of the extension rod, a limit end is provided at the end of the extension rod, and a displacement groove matching with the limit end is opened on the limit plate; The rotating rod is rotatably connected in the middle, one end is rotatably connected to the limit end, and the other end is rotatably connected to the limit plate. A fixed port is provided at the end of the rotating rod, and the fixed port is matched with the end of the heat conducting rod.

3. The hydrogen storage device for a hydrogen fuel cell according to claim 1, characterized in that: A baffle is arranged inside the connecting pipe, and the baffle extends obliquely from the outer edge of the connecting pipe toward the center and is close to the extension rod.

4. The hydrogen storage device for a hydrogen fuel cell according to claim 2, characterized in that: A sealing groove is provided in the middle of the heat conducting plate, and a sealing assembly is provided at the sealing groove, and the sealing assembly comprises: A telescopic spring fixedly connected to one side of the sealing groove; A dynamic ring is fixed to the other side of the telescopic spring, and a sealing ring is buckled at the end of the dynamic ring, and the sealing ring is fitted with the outside of the extension rod.

5. The hydrogen storage device for a hydrogen fuel cell according to claim 4, characterized in that: The extension rod is provided with an extrusion end adapted to the sealing groove, the extrusion end is in contact with the inner wall of the sealing groove, the end of the extension rod is stepped, and a reverse telescopic member is fixed between the end and the inner wall of the outer tank body.

6. The hydrogen storage device for a hydrogen fuel cell according to claim 5, characterized in that: The sealing groove port is provided with a U-shaped fixing groove, a compression spring is fixedly connected inside the U-shaped fixing groove, a ball is provided at the end of the compression spring, and limiting curved surfaces matching the surface of the ball are provided at both ends of the extrusion end.

7. The hydrogen storage device for a hydrogen fuel cell according to claim 1, characterized in that: A heat-conducting member is spirally wound around the outside of the inner tank body along the length direction of the inner tank body, and the heat-conducting member is fixedly connected to the end of the heat-conducting rod.

8. The hydrogen storage device for a hydrogen fuel cell according to claim 1, characterized in that: A shock absorbing assembly is provided between the outer tank body and the middle tank body, and the shock absorbing assembly comprises: A lower support frame is fixed to the inner wall of the outer tank, and the middle part of the lower support frame is bent to form a triangular inclined surface; An upper support frame supports the bottom of the middle tank body, a limited square hole is provided in the middle of the upper support frame, the bottom of the middle tank body is located in the limited square hole, and a rubber ring is fixed to the side edge of the limited square hole; The sleeve rods are fixed on the upper support frame and the lower support frame, and the sleeve rods are provided with at least two groups, each group is distributed up and down; A steel wire rope spirally passed through a group of the sleeve rods, and the steel wire rope is distributed on the triangular inclined surface; The telescopic rod is vertically connected to the bottom of the outer tank body, the top of the telescopic rod is connected to the middle of the triangular inclined surface, and a buffer spring is sleeved on the outside of the telescopic rod, and the buffer spring is fixed between the outer tank body and the middle of the triangular inclined surface.

9. The hydrogen storage device for a hydrogen fuel cell according to claim 1, characterized in that: A protective layer is provided between the outer wall of the connecting pipe and the inner wall of the outer tank body.

10. The method for using the hydrogen storage device for a hydrogen fuel cell according to any one of claims 1 to 9, characterized in that: The steps include: S1. Liquid hydrogen is stored inside the inner tank, and the external environment heats up, causing the liquid hydrogen to gasify; S2, the refrigeration plate works, the air inlet valve opens, and hydrogen enters the connecting pipe through the air inlet valve; S3, the extension rod is pushed, and the fixed end of the rotating rod is connected to the heat conducting rod; S4, the temperature of the cooling plate is transferred to the rotating rod through the heat conducting plate, and then to the heat conducting rod; S5, until the hydrogen in the inner tank is liquefied again, the air inlet valve is closed, the rotating rod is disconnected, and the extension rod is reset.

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