A hydrogen storage and recycling system for a fuel cell

Abstract

The application discloses a hydrogen storage recycling system of a fuel cell and relates to the technical field of hydrogen fuel cells.The hydrogen storage recycling system of the fuel cell comprises a battery box main body, a hydrogen storage tank and a fuel cell stack are fixedly installed in the inside of the battery box main body, and a recycling mechanism is arranged on one side of the fuel cell stack.When the hydrogen storage recycling system of the fuel cell is used to recycle hydrogen, the gas discharged from the fuel cell stack enters the inside of a gas collecting tank through a buffer tank and a connecting pipe, and then enters the inside of a filter cartridge through a gas outlet, the inlet end of the filter cartridge is conical, so that the speed of the gas entering the filter cartridge is improved, the gas is driven to rotate the rotating shaft through the spiral blade, the rotating shaft drives the filter holder to rotate, the hydrogen is rapidly filtered through the filter membrane under the centrifugal effect, the shear force generated by the rotation is utilized to inhibit the pollution of the filter membrane, and therefore the service life of the filter membrane is effectively prolonged and the replacement frequency of the filter membrane is reduced.

Description

Technical Field

[0001] This invention relates to the field of hydrogen fuel cell technology, specifically to a hydrogen storage and recovery system for a fuel cell. Background Technology

[0002] Fuel cells use hydrogen as an energy carrier and convert chemical energy into electrical energy through electrochemical reactions. They have advantages such as high energy conversion efficiency and zero carbon emissions. Their hydrogen storage and recycling system covers hydrogen storage, supply, recycling and reuse, aiming to ensure the system operates efficiently and stably, while improving hydrogen utilization and reducing costs.

[0003] Traditional fuel cell hydrogen storage and recovery systems typically use membrane materials to separate hydrogen from other gases based on their permeation rate differences. This method offers high separation efficiency and purity. However, in practical applications, existing hydrogen membrane separation structures are mostly flat sheet membranes. As a result, the membrane material surface is prone to contamination during use, leading to a shorter lifespan and higher maintenance frequency.

[0004] Combining the above issues, we find that existing hydrogen storage and recycling systems for fuel cells on the market cannot simultaneously avoid the problems mentioned above when in use. Even if they can be solved, they require external tools to solve them, thus failing to achieve the desired effect. Therefore, we propose a hydrogen storage and recycling system for fuel cells. Summary of the Invention

[0005] The purpose of this invention is to provide a hydrogen storage and recycling system for fuel cells to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a hydrogen storage and recycling system for a fuel cell, comprising a battery box body, wherein a hydrogen storage tank and a fuel cell stack are fixedly installed inside the battery box body, and a recycling mechanism is provided on one side of the fuel cell stack;

[0007] The recovery mechanism includes a buffer tank, which is fixedly connected to one side of the fuel cell stack. A connecting pipe is fixedly connected to one side of the buffer tank, and a gas collection tank is fixedly connected to one end of the connecting pipe. An outlet is provided on one side of the gas collection tank, and a separation component is provided on one side of the gas collection tank. The separation component is connected to the outlet. An exhaust component is provided inside both the buffer tank and the gas collection tank, and a sealing component is provided on the surface of the gas collection tank.

[0008] Preferably, the buffer tank and the gas collecting tank are fixedly connected to the side opposite to the hydrogen storage tank with a connecting block, and the hydrogen storage tank is fixedly installed with a connecting frame on the side opposite to the buffer tank and the gas collecting tank. The connecting block is slidably connected inside the connecting frame, and a bolt is threadedly connected to one side of the connecting frame, with one end of the bolt penetrating through the connecting frame and the connecting block.

[0009] Preferably, the separation component includes a filter cartridge, which is fixedly installed on one side of the gas collecting tank and connected to the gas outlet. A rotating shaft is rotatably installed inside the filter cartridge. A filter frame is fixedly sleeved on one side of the rotating shaft surface. Several filter membranes are fixedly installed inside the filter frame. A spiral blade is fixedly installed on the other side of the rotating shaft surface. One end of the filter cartridge is fixedly connected to the hydrogen storage tank.

[0010] Preferably, a bracket is fixedly installed inside the filter cartridge, and support blocks are fixedly installed at both ends of the rotating shaft. The support blocks are rotatably connected inside the bracket, and a limit block is fixedly installed on the surface of the filter frame. The surface of the limit block is slidably connected to the inner cavity of the filter cartridge.

[0011] Preferably, the sealing assembly includes an electric push rod, which is fixedly installed on the surface of the gas collecting tank. A top frame is fixedly connected to the telescopic end of the electric push rod. Both ends of the top frame pass through the connecting pipe and the gas collecting tank, respectively, and are slidably connected to the inner cavities of the connecting pipe and the gas collecting tank. Both ends of the top frame are fixedly connected to sealing plates, which are used in conjunction with the connecting pipe and the gas outlet, respectively. A vent is provided on the side of the gas collecting tank opposite to the top frame. A vertical rod is fixedly connected to the side of the top frame opposite to the vent. One end of the vertical rod passes through the vent and is slidably connected to the inner cavity of the vent. A blocking block is fixedly installed on one end of the vertical rod. The surface of the blocking block is slidably connected to the inner wall of the vent. A sealing gasket is fixedly installed on the surface of the blocking block, and the sealing gasket abuts against the inner wall of the gas collecting tank.

[0012] Preferably, a limiting frame is fixedly installed on the surface of the gas collecting tank, and the top frame is slidably sleeved on the surface of the limiting frame.

[0013] Preferably, the exhaust assembly includes a first partition and a second partition, which are slidably connected inside the buffer tank and the gas collecting tank, respectively. Movable frames are fixedly connected to the surfaces of both the first and second partitions, and the surfaces of the two movable frames are slidably connected to the inner cavities of the gas collecting tank and the buffer tank, respectively. Toothed plates are fixedly installed on opposite sides of the two movable frames. A rotating rod is rotatably installed on opposite sides of the gas collecting tank and the buffer tank. A gear is fixedly sleeved on the surface of the rotating rod, and both sides of the gear mesh with the surfaces of the two toothed plates, respectively. Positioning rods are fixedly connected to the surfaces of both the first and second partitions, and one end of several positioning rods passes through the gas collecting tank and the buffer tank, respectively, and is slidably connected to the inner cavities of the gas collecting tank and the buffer tank. A spring is fixedly connected inside the buffer tank, and one end of the spring is fixedly connected to the surface of the first partition. The spring is slidably sleeved on the surface of the positioning rod.

[0014] Preferably, both the first partition and the second partition have sealing grooves on their periphery, and sealing rings are fixedly fitted inside the sealing grooves. The surfaces of the two sealing rings are slidably connected to the inner cavities of the buffer tank and the gas collecting tank, respectively.

[0015] Preferably, the buffer tank and the gas collecting tank are fixedly mounted on opposite sides of a mounting frame, and a mounting block is fixedly mounted on one end of the rotating rod, with the mounting block rotatably connected inside the mounting frame.

[0016] Preferably, the buffer tank and the gas collecting tank are each fixedly installed with a slider on the side opposite to the hydrogen storage tank, and the inner walls of the two movable frames are provided with sliding grooves, the inner cavity of the sliding grooves being slidably connected to the surface of the slider.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. In the hydrogen recovery process of this invention, the gas discharged from the fuel cell stack enters the gas collection tank through the buffer tank and connecting pipe, and then enters the filter cartridge through the gas outlet. By setting the inlet end of the filter cartridge to be conical, the speed of the gas entering the filter cartridge is increased, so that the gas drives the rotating shaft to rotate through the helical blades. The rotating shaft drives the filter frame to rotate, so that the hydrogen passes through the filter membrane quickly under centrifugal force. The shear force generated by the rotation inhibits the fouling of the filter membrane, thereby effectively improving the service life of the filter membrane and reducing the replacement frequency of the filter membrane. The filtered hydrogen enters the hydrogen storage tank through the filter cartridge for subsequent reuse.

[0019] 2. When there is too much gas inside the gas collecting tank, the present invention seals the gas outlet and connecting pipe through a sealing component and separates the plug from the vent. At this time, the gas discharged from the fuel cell stack gathers in the buffer tank. As the gas pressure increases, the gas pushes the first partition. The first partition drives one of the moving frames to move simultaneously. One of the moving frames drives the other moving frame to move the second partition through a toothed plate and gears. By moving the second partition, the space inside the gas collecting tank is reduced, and the gas inside the gas collecting tank can be discharged. Then the sealing component is reset, and hydrogen can be recovered again through the gas collecting tank and the separation component. This cycle can be repeated to discharge residual gas and avoid affecting normal gas transmission. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the internal structure of the battery box body of the present invention;

[0022] Figure 3 This is a schematic diagram of the recycling mechanism of the present invention;

[0023] Figure 4 This is a schematic diagram of the gas collection tank structure of the present invention;

[0024] Figure 5 For the present invention Figure 4 A schematic diagram of the cross-sectional structure;

[0025] Figure 6 This is a schematic diagram of the structure of the separate component of the present invention;

[0026] Figure 7 This is a schematic diagram of the filter frame structure of the present invention;

[0027] Figure 8 This is a schematic diagram of the mobile frame structure of the present invention;

[0028] Figure 9 This is a schematic diagram of the exhaust assembly structure of the present invention;

[0029] Figure 10 This is a schematic diagram of the closed component structure of the present invention.

[0030] In the diagram: 1. Battery box body; 101. Hydrogen storage tank; 102. Fuel cell stack; 2. Recovery mechanism; 21. Buffer tank; 2101. Connecting pipe; 22. Gas collection tank; 2201. Gas outlet; 23. Separation assembly; 2301. Filter cartridge; 2302. Rotating shaft; 2303. Spiral blade; 2304. Filter frame; 2305. Filter membrane; 2306. Support; 2307. Support block; 2308. Limiting block; 24. Exhaust assembly; 2401. First partition; 2402. Second partition; 2403. Moving frame; 2404. 2405. Toothed plate; 2406. Rotating rod; 2407. Gear; 2408. Spring; 2409. Positioning rod; 24000. Sealing groove; 2410. Sealing ring; 2411. Mounting bracket; 2412. Mounting block; 2413. Sliding block; 2414. Slide groove; 25. Sealing assembly; 2501. Electric push rod; 2502. Top frame; 2503. Sealing plate; 2504. Vent; 2505. Vertical rod; 2506. Block; 2507. Sealing gasket; 2508. Limiting bracket; 26. Connecting block; 27. Connecting bracket; 28. Bolt. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Example 1: Please refer to Figures 1-10 The present invention provides a technical solution: a hydrogen storage and recycling system for a fuel cell, comprising a battery box body 1, wherein a hydrogen storage tank 101 and a fuel cell stack 102 are fixedly installed inside the battery box body 1, and a recycling mechanism 2 is provided on one side of the fuel cell stack 102; wherein, the battery box body 1 also contains a central control unit, a solenoid valve, a delivery pump, a gas pump, a storage battery, an inverter and other structures, which are existing technologies and will not be described in detail here;

[0033] The recovery mechanism 2 includes a buffer tank 21, which is fixedly connected to one side of the fuel cell stack 102. A connecting pipe 2101 is fixedly connected to one side of the buffer tank 21, and a gas collecting tank 22 is fixedly connected to one end of the connecting pipe 2101. A gas outlet 2201 is provided on one side of the gas collecting tank 22, and a separation component 23 is provided on one side of the gas collecting tank 22. The separation component 23 is connected to the gas outlet 2201. An exhaust component 24 is provided inside both the buffer tank 21 and the gas collecting tank 22, and a sealing component 25 is provided on the surface of the gas collecting tank 22. A connecting block 26 is fixedly connected to the side of the buffer tank 21 and the gas collecting tank 22 opposite to the hydrogen storage tank 101. A connecting frame 27 is fixedly installed on the side of the hydrogen storage tank 101 opposite to the buffer tank 21 and the gas collecting tank 22. The connecting block 26 is slidably connected inside the connecting frame 27. A bolt 28 is threadedly connected to one side of the connecting frame 27, and one end of the bolt 28 passes through the connecting frame 27 and the connecting block 26.

[0034] Hydrogen is delivered to the fuel cell stack 102 via the hydrogen storage tank 101, enabling the fuel cell stack 102 to generate electricity. The gas discharged from the fuel cell stack 102 enters the separation component 23 through the buffer tank 21, connecting pipe 2101, and gas collection tank 22. The separation component 23 filters the gas to recover hydrogen and returns it to the hydrogen storage tank 101 for storage, allowing for reuse and reducing hydrogen consumption. When there is too much hydrogen in the gas collection tank 22, the outlet 2201 and connecting pipe 2101 are sealed by the sealing component 25. At this time, the gas discharged from the fuel cell stack 102 accumulates in the buffer tank 21, and the residual gas in the gas collection tank 22 is discharged through the exhaust component 24. Then, the sealing component 25 is released, allowing the gas discharged from the fuel cell stack 102 to re-enter the gas collection tank 22 and continue to be filtered by the separation component 23.

[0035] As a further definition of the separation component 23 of the present invention, the separation component 23 includes a filter cartridge 2301, which is fixedly installed on one side of the gas collecting tank 22. The filter cartridge 2301 is connected to the gas outlet 2201. A rotating shaft 2302 is rotatably installed inside the filter cartridge 2301. A filter frame 2304 is fixedly sleeved on one side of the surface of the rotating shaft 2302. A plurality of filter membranes 2305 are fixedly installed inside the filter frame 2304. A spiral blade 2303 is fixedly installed on the other side of the surface of the rotating shaft 2302. One end of the filter cartridge 2301 is fixedly connected to the hydrogen storage tank 101. A bracket 2306 is fixedly installed inside the filter cartridge 2301. Both ends of the rotating shaft 2302 are fixedly... A support block 2307 is fixedly installed inside the support frame 2306. A limiting block 2308 is fixedly installed on the surface of the filter frame 2304, and the surface of the limiting block 2308 is slidably connected to the inner cavity of the filter cartridge 2301. The filter membrane 2305 is made of polyimide or polyphenylene sulfide-based composite membrane, and the surface is coated with a nano-scale silica hydrophobic layer to improve hydrogen selectivity and anti-fouling ability. The membrane cartridge diameter is 200-400mm, the membrane thickness is 50-100μm, the support layer thickness is 1-2mm, and the total wall thickness is ≤3mm to reduce mass. The filter membrane 2305 is installed in the filter frame 2304 at 15°-30° to enhance the fluid turbulence effect.

[0036] When the gas discharged from the fuel cell stack 102 enters the filter cartridge 2301 through the outlet 2201, the tapered design of the inlet end of the filter cartridge 2301 increases the speed of the gas entering the filter cartridge 2301. This causes the gas to drive the rotating shaft 2302 to rotate through the spiral blades 2303. The position of the rotating shaft 2302 is stabilized by the support block 2307 and the bracket 2306, and the position of the filter frame 2304 is stabilized by the limiting block 2308. This causes the rotating shaft 2302 to drive the filter frame 2304 to rotate, so that the hydrogen gas passes through the filter membrane 2305 quickly under centrifugal force, and the shear force generated by the rotation inhibits the fouling of the filter membrane 2305.

[0037] The specific implementation of this embodiment is as follows: The hydrogen storage tank 101 delivers hydrogen to the fuel cell stack 102 via a gas pump, enabling the fuel cell stack 102 to generate electricity. The hydrogen circulates between the hydrogen storage tank 101, the fuel cell stack 102, the buffer tank 21, the gas collecting tank 22, and the filter cartridge 2301. The gas discharged from the fuel cell stack 102 enters the filter cartridge 2301 through the buffer tank 21, connecting pipe 2101, gas collecting tank 22, and outlet 2201. The tapered design at the inlet end of the filter cartridge 2301 increases the speed of the gas entering the filter cartridge 2301, causing the gas to rotate through the helical blades 2303, driving the rotating shaft 2302 to rotate. The position of the rotating shaft 2302 is stabilized by the support block 2307 and the bracket 2306, and the position of the filter frame 2304 is stabilized by the limiting block 2308. Shaft 2302 drives filter frame 2304 to rotate, so that hydrogen gas passes through filter membrane 2305 quickly under centrifugal force, and the shear force generated by rotation inhibits the fouling of filter membrane 2305. The gas is filtered by separation component 23 to recover hydrogen gas, and the hydrogen gas is transported back to hydrogen storage tank 101 for storage so that hydrogen gas can be reused and hydrogen gas consumption can be reduced. When there is too much hydrogen gas in gas collection tank 22, the gas outlet 2201 and connecting pipe 2101 are sealed by sealing component 25. At this time, the gas discharged from fuel cell stack 102 is collected in buffer tank 21, and the residual gas in gas collection tank 22 is discharged by exhaust component 24. Then the sealing operation of sealing component 25 is released so that the gas discharged from fuel cell stack 102 can re-enter gas collection tank 22 and continue to be filtered by hydrogen gas through separation component 23.

[0038] Example 2: Please refer to Figures 1-10 The present invention provides a technical solution: a hydrogen storage and recycling system for a fuel cell. The present invention makes corresponding improvements to address the technical problems mentioned in the background art.

[0039] As a further definition of the sealing component 25 of the present invention, the sealing component 25 includes an electric push rod 2501, which is fixedly installed on the surface of the gas collecting tank 22. A top frame 2502 is fixedly connected to the telescopic end of the electric push rod 2501. Both ends of the top frame 2502 pass through the connecting pipe 2101 and the gas collecting tank 22 respectively, and are slidably connected to the inner cavities of the connecting pipe 2101 and the gas collecting tank 22. Sealing plates 2503 are fixedly connected to both ends of the top frame 2502. The two sealing plates 2503 are used in conjunction with the connecting pipe 2101 and the air outlet 2201 respectively. An air vent 2504 is provided on the side of the gas collecting tank 22 opposite to the top frame 2502. The top frame 2502 and the air vent 2504 are connected... A vertical rod 2505 is fixedly connected to the opposite side. One end of the vertical rod 2505 passes through the vent 2504 and is slidably connected to the inner cavity of the vent 2504. A block 2506 is fixedly installed at one end of the vertical rod 2505. The surface of the block 2506 is slidably connected to the inner wall of the vent 2504. A sealing gasket 2507 is fixedly installed on the surface of the block 2506. The sealing gasket 2507 abuts against the inner wall of the gas collecting tank 22. A limit frame 2508 is fixedly installed on the surface of the gas collecting tank 22. A top frame 2502 is slidably sleeved on the surface of the limit frame 2508. A sealing structure, such as a rubber gasket, is provided at the joint between the top frame 2502 and the connecting pipe 2101 and the gas collecting tank 22.

[0040] The electric push rod 2501 drives the top frame 2502 to move, and the limit frame 2508 stabilizes the position of the top frame 2502. This causes the top frame 2502 to move the two sealing plates 2503, which then seal the connecting pipe 2101 and the vent 2201. The top frame 2502 also moves the blocking block 2506 simultaneously via the vertical rod 2505, causing the blocking block 2506 to separate from the vent 2504. This allows residual gas in the gas collection tank 22 to be discharged through the vent 2504. After the residual gas is discharged, the electric push rod 2501 drives the top frame 2502 to reset, so that the sealing plate 2503 no longer seals the connecting pipe 2101 and the vent 2201. At the same time, the blocking block 2506 is inserted into the vent 2504 and sealed by the sealing gasket 2507, preventing gas leakage from the gas collection tank 22.

[0041] The exhaust assembly 24 includes a first partition 2401 and a second partition 2402. The first partition 2401 and the second partition 2402 are slidably connected inside the buffer tank 21 and the gas collecting tank 22, respectively. Movable frames 2403 are fixedly connected to the surfaces of both the first partition 2401 and the second partition 2402. The surfaces of the two movable frames 2403 are slidably connected to the inner cavities of the gas collecting tank 22 and the buffer tank 21, respectively. Toothed plates 2404 are fixedly installed on opposite sides of the two movable frames 2403. A rotating rod 2405 is rotatably mounted on opposite sides of the gas collecting tank 22 and the buffer tank 21. Gear 2406 is fixedly sleeved on the surface of 405. The two sides of gear 2406 mesh with the surfaces of two toothed plates 2404 respectively. Positioning rods 2408 are fixedly connected to the surfaces of the first partition 2401 and the second partition 2402. One end of several positioning rods 2408 passes through the gas collecting tank 22 and the buffer tank 21 respectively and is slidably connected to the inner cavity of the gas collecting tank 22 and the buffer tank 21. Spring 2407 is fixedly connected inside the buffer tank 21. One end of spring 2407 is fixedly connected to the surface of the first partition 2401. Spring 2407 is slidably sleeved on the surface of positioning rod 2408.

[0042] After the sealing assembly 25 seals the connecting pipe 2101 and the outlet 2201, the gas discharged from the fuel cell stack 102 accumulates in the buffer tank 21 and exerts pressure on the first partition 2401. This causes the first partition 2401 to move one of the movable frames 2403. The movable frame 2403, through two toothed plates 2404 and a gear 2406, moves the other movable frame 2403, which in turn moves the second partition 2402. The second partition 2402 then pushes the gas in the gas collection tank 22, causing the gas to collect... The residual gas in the gas tank 22 is discharged from the vent 2504. Then, the sealing mechanism releases the sealing work of the connecting pipe 2101 and the vent 2201 and closes the vent 2504. At this time, the first partition 2401 is reset by the support of the spring 2407, and a thrust is generated on the gas in the buffer tank 21, so that the gas in the buffer tank 21 and the gas discharged from the fuel cell stack 102 re-enter the hydrogen storage tank 101 for hydrogen recovery. In this way, the residual gas can be discharged and the normal gas transmission work can be avoided.

[0043] Sealing grooves 2409 are provided on the periphery of both the first partition 2401 and the second partition 2402. Sealing rings 2410 are fixedly fitted inside the cavity of the sealing grooves 2409. The surfaces of the two sealing rings 2410 are slidably connected to the inner cavities of the buffer tank 21 and the gas collecting tank 22, respectively. A mounting bracket 2411 is fixedly installed on the opposite side of the buffer tank 21 and the gas collecting tank 22. A mounting block 2412 is fixedly installed on one end of the rotating rod 2405. The mounting block 2412 is rotatably connected to the inside of the mounting bracket 2411. Slider blocks 2413 are fixedly installed on the opposite side of the buffer tank 21 and the gas collecting tank 22 from the hydrogen storage tank 101. Slider blocks 2413 are provided on the inner walls of both moving brackets 2403. Sliding grooves 2414 are provided on the inner walls of both moving brackets 2403. The surface of block 2413 is slidably connected; by installing the sealing ring 2410 inside the sealing groove 2409, the gap between the first partition 2401 and the inner wall of the buffer tank 21 and the gap between the second partition 2402 and the inner wall of the gas collecting tank 22 can be effectively sealed to avoid air leakage and other problems. During the movement of the moving frame 2403, the position of the moving frame 2403 can be effectively stabilized by the slider 2413 and the sliding groove 2414 to avoid the position of the moving frame 2403 from being offset and affecting the position of the toothed plate 2404. The position of the rotating rod 2405 can be effectively stabilized by the mounting block 2412 and the mounting bracket 2411 to avoid the position of the rotating rod 2405 from being offset and affecting the position of the gear 2406.

[0044] The specific implementation of this embodiment is as follows: The top frame 2502 is moved by the electric push rod 2501, and the position of the top frame 2502 is stabilized by the limit frame 2508, so that the top frame 2502 moves the two sealing plates 2503, so that the sealing plates 2503 can seal the connecting pipe 2101 and the air outlet 2201. At the same time, the top frame 2502 moves the blocking block 2506 through the vertical rod 2505, so that the blocking block 2506 separates from the vent 2504. At this time, the gas discharged from the fuel cell stack 102 gathers in the buffer tank 21 and affects the first partition 24. Pressure is generated at 01, and the sealing ring 2410 in the sealing groove 2409 prevents air leakage between the first partition 2401 and the inner wall of the buffer tank 21. The positioning rod 2408 stabilizes the positions of the first partition 2401 and the second partition 2402, causing the first partition 2401 to drive one of the moving frames 2403 to move. The slider 2413 and the slide groove 2414 stabilize the position of the moving frame 2403, and the mounting block 2412 and the mounting bracket 2411 stabilize the position of the rotating rod 2405, thereby stabilizing the position of the gear 2406, so that one of the moving frames 2403 can move. The moving frame 2403 drives another moving frame 2403 to move via two toothed plates 2404 and gears 2406. The other moving frame 2403 drives the second partition 2402 to move simultaneously. The second partition 2402 pushes the gas in the gas collecting tank 22, so that the residual gas in the gas collecting tank 22 is discharged from the vent 2504. Then, the electric push rod 2501 drives the top frame 2502 to reset, so that the sealing plate 2503 no longer seals the connecting pipe 2101 and the vent 2201, and at the same time, the plug 2506 is inserted into the vent 2504. The gasket 2507 is used for sealing. At this time, the first partition 2401 is reset by the support of the spring 2407, and the second partition 2402 is reset by the moving frame 2403, the toothed plate 2404 and the gear 2406. The first partition 2401 pushes the gas in the buffer tank 21, so that the gas in the buffer tank 21 and the gas discharged from the fuel cell stack 102 re-enter the hydrogen storage tank 101 for hydrogen recovery. In this way, the residual gas can be discharged and the normal gas transmission can be avoided.

[0045] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0046] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hydrogen storage and recovery system for a fuel cell, comprising a battery box body (1), characterized in that: The battery box body (1) is fixedly installed with a hydrogen storage tank (101) and a fuel cell stack (102), and a recycling mechanism (2) is provided on one side of the fuel cell stack (102). The recycling mechanism (2) includes a buffer tank (21), which is fixedly connected to one side of the fuel cell stack (102). A connecting pipe (2101) is fixedly connected to one side of the buffer tank (21), and a gas collecting tank (22) is fixedly connected to one end of the connecting pipe (2101). An outlet (2201) is provided on one side of the gas collecting tank (22), and a separation component (23) is provided on one side of the gas collecting tank (22). The separation component (23) is connected to the outlet (2201). An exhaust component (24) is provided inside the buffer tank (21) and the gas collecting tank (22), and a sealing component (25) is provided on the surface of the gas collecting tank (22).

2. The hydrogen storage and recovery system for a fuel cell according to claim 1, characterized in that: The buffer tank (21) and the gas collecting tank (22) are fixedly connected to the side opposite to the hydrogen storage tank (101) with a connecting block (26). The hydrogen storage tank (101) is fixedly installed with a connecting frame (27) on the side opposite to the buffer tank (21) and the gas collecting tank (22). The connecting block (26) is slidably connected inside the connecting frame (27). A bolt (28) is threadedly connected to one side of the connecting frame (27). One end of the bolt (28) passes through the connecting frame (27) and the connecting block (26).

3. The hydrogen storage and recovery system for a fuel cell according to claim 1, characterized in that: The separation component (23) includes a filter cartridge (2301), which is fixedly installed on one side of the gas collecting tank (22). The filter cartridge (2301) is connected to the gas outlet (2201). A rotating shaft (2302) is rotatably installed inside the filter cartridge (2301). A filter frame (2304) is fixedly sleeved on one side of the surface of the rotating shaft (2302). Several filter membranes (2305) are fixedly installed inside the filter frame (2304). A spiral blade (2303) is fixedly installed on the other side of the surface of the rotating shaft (2302). One end of the filter cartridge (2301) is fixedly connected to the hydrogen storage tank (101).

4. The hydrogen storage and recovery system for a fuel cell according to claim 3, characterized in that: A bracket (2306) is fixedly installed inside the filter cartridge (2301). Support blocks (2307) are fixedly installed at both ends of the rotating shaft (2302). The support blocks (2307) are rotatably connected inside the bracket (2306). A limiting block (2308) is fixedly installed on the surface of the filter frame (2304). The surface of the limiting block (2308) is slidably connected to the inner cavity of the filter cartridge (2301).

5. A hydrogen storage and recovery system for a fuel cell according to claim 1, characterized in that: The sealing assembly (25) includes an electric push rod (2501), which is fixedly installed on the surface of the gas collecting tank (22). A top frame (2502) is fixedly connected to the telescopic end of the electric push rod (2501). Both ends of the top frame (2502) pass through the connecting pipe (2101) and the gas collecting tank (22) respectively, and are slidably connected to the inner cavities of the connecting pipe (2101) and the gas collecting tank (22). Sealing plates (2503) are fixedly connected to both ends of the top frame (2502). The two sealing plates (2503) are used in conjunction with the connecting pipe (2101) and the air outlet (2201) respectively. The gas collecting tank (22) and... A vent (2504) is provided on one side of the top frame (2502). A vertical rod (2505) is fixedly connected to the side of the top frame (2502) opposite to the vent (2504). One end of the vertical rod (2505) passes through the vent (2504) and is slidably connected to the inner cavity of the vent (2504). A block (2506) is fixedly installed on one end of the vertical rod (2505). The surface of the block (2506) is slidably connected to the inner wall of the vent (2504). A sealing gasket (2507) is fixedly installed on the surface of the block (2506). The sealing gasket (2507) abuts against the inner wall of the gas collecting tank (22).

6. A hydrogen storage and recovery system for a fuel cell according to claim 5, characterized in that: The gas collecting tank (22) is fixedly mounted on the surface of the limiting frame (2508), and the top frame (2502) is slidably sleeved on the surface of the limiting frame (2508).

7. A hydrogen storage and recovery system for a fuel cell according to claim 1, characterized in that: The exhaust assembly (24) includes a first partition (2401) and a second partition (2402). The first partition (2401) and the second partition (2402) are slidably connected inside the buffer tank (21) and the gas collecting tank (22), respectively. Movable frames (2403) are fixedly connected to the surfaces of both the first partition (2401) and the second partition (2402). The surfaces of the two movable frames (2403) are slidably connected to the inner cavities of the gas collecting tank (22) and the buffer tank (21), respectively. Toothed plates (2404) are fixedly installed on opposite sides of both movable frames (2403). A rotating rod (2405) is rotatably installed on opposite sides of the gas collecting tank (22) and the buffer tank (21). Gears (2406) are fixedly sleeved on the surface of the first partition (2405). The two sides of the gears (2406) mesh with the surfaces of the two toothed plates (2404). Positioning rods (2408) are fixedly connected to the surfaces of the first partition (2401) and the second partition (2402). One end of several positioning rods (2408) passes through the gas collecting tank (22) and the buffer tank (21) respectively and is slidably connected to the inner cavity of the gas collecting tank (22) and the buffer tank (21). A spring (2407) is fixedly connected inside the buffer tank (21). One end of the spring (2407) is fixedly connected to the surface of the first partition (2401). The spring (2407) is slidably sleeved on the surface of the positioning rods (2408).

8. A hydrogen storage and recovery system for a fuel cell according to claim 7, characterized in that: The first partition (2401) and the second partition (2402) are provided with sealing grooves (2409) on their periphery. The inner cavity of the sealing groove (2409) is fixedly fitted with sealing rings (2410). The surfaces of the two sealing rings (2410) are slidably connected to the inner cavities of the buffer tank (21) and the gas collecting tank (22), respectively.

9. A hydrogen storage and recovery system for a fuel cell according to claim 7, characterized in that: The buffer tank (21) and the gas collecting tank (22) are fixedly mounted on opposite sides of a mounting frame (2411), and a mounting block (2412) is fixedly mounted on one end of the rotating rod (2405). The mounting block (2412) is rotatably connected to the inside of the mounting frame (2411).

10. A hydrogen storage and recovery system for a fuel cell according to claim 7, characterized in that: The buffer tank (21) and the gas collecting tank (22) are both fixedly installed with sliders (2413) on the side opposite to the hydrogen storage tank (101). The inner walls of the two moving frames (2403) are provided with grooves (2414), and the inner cavity of the grooves (2414) is slidably connected to the surface of the sliders (2413).

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