Water amount control device for low temperature start of fuel cell

Abstract

This invention discloses a water volume control device for low-temperature start-up of a fuel cell, including a control cabinet with a door on the front and a housing inside; it also includes a drying component, which includes a first shroud installed inside the housing and a first impeller rotatably connected to it. The drying component generates airflow through the rotation of the first impeller to dry the gas passage of the fuel cell; and a wetting component, which includes a water storage tank installed inside the housing. This water volume control device for low-temperature start-up of a fuel cell, by incorporating the drying component and the wetting component, facilitates the start-up of the fuel cell. Therefore, it solves the problem in the prior art where the membrane electrode assembly (MEA) is kept moist to facilitate start-up, leading to the rare problem of water freezing and expanding in the fuel cell during low-temperature environments, causing damage to the bipolar plates.

Description

Technical Field

[0001] This invention relates to the field of fuel cell low-temperature start-up technology, specifically to a water volume control device for fuel cell low-temperature start-up. Background Technology

[0002] A fuel cell is a chemical device that directly converts the chemical energy of fuel into electrical energy. It is also known as an electrochemical generator. It is the fourth type of power generation technology after hydropower, thermal power generation and nuclear power generation. Because fuel cells convert the Gibbs free energy of fuel into electrical energy through electrochemical reactions, they are not limited by the Carnot cycle effect and are therefore highly efficient.

[0003] Currently, fuel cells generate a large amount of liquid water in the gas flow channel during operation. When the fuel cell stops working, water accumulates inside. If exposed to low temperatures, this water may freeze and expand, potentially damaging the bipolar plates. Therefore, when shutting down the fuel cell, the liquid water must be purged away as much as possible. However, the membrane electrode assembly (MEA) cannot be allowed to dry out completely for the next startup. The water content of the MEA after shutdown and purging must be controlled within a certain range. However, even controlling the water content within a certain range means that moisture still exists on the MEA. Therefore, when the MEA is exposed to low temperatures, a small amount of moisture can still freeze, posing a risk of damaging the bipolar plates. To address this, we propose a water volume control device for low-temperature startup of fuel cells. Summary of the Invention

[0004] The purpose of this invention is to provide a water volume control device for low-temperature start-up of fuel cells, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a water volume control device for low-temperature start-up of a fuel cell, comprising: a control cabinet, a cabinet door installed on the front side of the control cabinet, and a housing installed inside the control cabinet; further comprising a drying component, the drying component comprising a first wind shroud installed inside the housing, the wind shroud being rotatably connected to a first impeller, the drying component generating wind power through the rotation of the first impeller to dry the gas passage of the fuel cell; and a humidification component, the humidification component comprising a water storage tank installed inside the housing, the water storage tank being connected to a water supply pipe extending to the outside of the control cabinet, and the water storage tank being connected to an air supply pipe connected to the first wind shroud, the humidification component humidifying the air through the water storage tank and then introducing it into the gas passage of the fuel cell to humidify the fuel cell, which is beneficial for completely drying the fuel cell and avoiding water accumulation at low temperatures that could lead to freezing and volume expansion, thereby damaging the bipolar plates, and also humidifying the fuel cell before startup to avoid dry startup.

[0006] Preferably, the drying assembly includes an air outlet pipe communicating with the first air shroud and a drive component connected to the first impeller. The air outlet pipe extends to the outside of the control cabinet, and the air shroud has a through hole with a sealing component installed inside the through hole, which facilitates the drying of the fuel cell and prevents water accumulation.

[0007] Preferably, the driving component includes a motor fixed inside the housing, the output end of the motor is fixedly connected to a coupling, one end of the coupling is fixedly connected to a drive shaft fixedly connected to the first impeller, and the drive shaft is rotatably connected to the first fan cover, which is beneficial for providing driving force.

[0008] Preferably, the wetting assembly includes an air inlet pipe connected to the water storage tank, one end of the air inlet pipe being connected to a second wind shroud, a second impeller being rotatably connected inside the second wind shroud, and one end of the second wind shroud being connected to an air suction pipe. The axis of the second impeller is fixedly connected to a rotating shaft rotatably connected to the second wind shroud, and a slot is provided at the rotating end. A transmission component connected to the drive shaft is connected inside the slot, and an agitator installed inside the water storage tank is also connected to the rotating shaft, which is beneficial for wetting the fuel cell.

[0009] Preferably, the transmission component includes a first drive wheel fixedly connected to the drive shaft, a second belt drivingly connected to the outer surface of the first drive wheel, a second driven wheel drivingly connected to one end of the second belt, a connecting shaft fixedly connected to the shaft of the second driven wheel and rotatably connected to the housing, and a linkage component installed inside the connecting shaft, which is beneficial for power transmission.

[0010] Preferably, the linkage includes a support base fixed inside the housing, a coil fixedly connected to the support base, an electromagnet connected to the coil, a magnet mounted on one side of the electromagnet, a plug rod adapted to the slot fixedly connected to one end of the magnet, the plug rod slidably connected to the connecting shaft, a tapered head fixedly connected to one end of the plug rod, a connecting piece fixedly connected to the outer surface of the plug rod, the connecting piece connected to the sealing element, and a spring sleeved on the outside of the plug rod fixedly connected to one end of the connecting piece, the other end of the spring fixedly connected to the connecting shaft, which facilitates the rotation of the second impeller.

[0011] Preferably, the agitator includes a second driving wheel fixedly connected to the rotating shaft. A second belt is drivenly connected to the outer surface of the second driving wheel. A second driven wheel is drivenly connected to the second belt. An agitator shaft extending to and rotatably connected to the water storage tank is fixedly connected to the shaft of the second driven wheel. An agitator frame is fixedly connected to the outer surface of the agitator shaft, which facilitates the agitation of water, allowing water to fully contact with air. This enables the discharged gas to carry more moisture, thereby accelerating the wetting efficiency of the fuel cell.

[0012] Preferably, the sealing element includes a first sealing block for sealing the air supply pipe, a connecting plate is fixedly connected to the first sealing block, a connecting column is fixedly connected to the connecting plate and slidably connected to the first air hood, a movable plate is fixedly connected to one end of the connecting column, a plurality of sets of second sealing blocks for sealing through holes are fixedly connected to the movable plate, a movable column is fixedly connected to the movable plate, and a connecting rod fixedly connected to the connecting piece is fixedly connected to one end of the movable column, which is conducive to separating air drying and wetting.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] This invention incorporates a drying component and a wetting component. Therefore, when the fuel cell stops operating, starting the motor drives the coupling to rotate, which in turn drives the drive shaft, which in turn drives the first impeller. At this time, the first sealing block seals the gas delivery pipe, and the second sealing block is located away from the through-hole. Thus, the rotation of the first impeller generates airflow, which is then blown into the gas passage of the fuel cell through the air outlet pipe, thereby drying any accumulated water. Once the water is completely dried, the fuel cell will not experience ice formation and volume expansion that could damage the bipolar components during low-temperature environments. However, before the fuel cell is started again, to avoid static electricity, the membrane electrode assembly (MEA) needs a certain amount of moisture during startup. This prevents the MEA from becoming too dry and affecting the fuel cell's startup. At this time, by energizing the coil, the electromagnet becomes magnetic, but its magnetic properties are opposite to those of the magnet, thus moving the magnet. This, in turn, moves the insert rod. Due to the action of the conical head, the insert rod will insert into the slot. The movement of the insert rod also moves the connecting plate, which in turn moves the connecting rod, which in turn moves the movable column, which in turn moves the movable plate, and finally, the second sealing block. The movement of the movable plate closes the through hole, and the movement of the movable plate also moves the first sealing block, causing it to move away from the air supply pipe, thus opening the air supply pipe. The motor is then restarted, causing the drive shaft to rotate, which in turn rotates the first drive wheel, which in turn rotates the first belt, which in turn rotates the first driven wheel, which in turn rotates the connecting shaft. Since the insert rod is inserted into the slot, the connecting shaft rotates the insert rod, which in turn rotates the rotating shaft, thus rotating the second impeller. The air is then drawn into the storage tank through the suction pipe. During this process, the rotation of the rotating shaft also drives the first... The rotation of the two driving wheels drives the second belt to rotate, which in turn drives the second driven wheel to rotate, thus driving the agitator shaft to rotate, which in turn drives the agitator frame to rotate. This allows the air and water to mix thoroughly. The air containing moisture then enters the first shroud through the air supply pipe and is then transported to the fuel cell by the first impeller. This wets the membrane electrode assembly, facilitating the start-up of the fuel cell. This solves the problem in the prior art where the membrane electrode assembly is kept moist to facilitate start-up, which can lead to the rare problem of moisture freezing and expanding in low-temperature environments, causing damage to the bipolar plates. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the cross-sectional structure of the present invention;

[0017] Figure 3 This is a schematic diagram of the cross-sectional structure of the box body of the present invention;

[0018] Figure 4For the present invention Figure 3 Another perspective structural diagram;

[0019] Figure 5 This is a schematic diagram of the internal structure of the housing of the present invention;

[0020] Figure 6 This is a schematic diagram of the air-drying component structure of the present invention;

[0021] Figure 7 This is a schematic diagram of the wetting component structure of the present invention;

[0022] Figure 8 This is a schematic diagram of the transmission component structure of the present invention;

[0023] Figure 9 For the present invention Figure 8 Schematic diagram of the structure of area A in the middle;

[0024] Figure 10 This is a schematic diagram of the linkage structure of the present invention;

[0025] Figure 11 This is a schematic diagram of the agitator structure of the present invention;

[0026] Figure 12 This is a schematic diagram of the connection structure between the sealing element and the linkage element of the present invention;

[0027] Figure 13 For the present invention Figure 12 Schematic diagram of the structure of Zone B;

[0028] Figure 14 For the present invention Figure 12 Schematic diagram of the structure of the C-section.

[0029] In the diagram: 1-Control cabinet; 2-Cabinet door; 3-Box body; 4-Drying assembly; 5-First fan hood; 6-First impeller; 7-Wetting assembly; 8-Water storage tank; 9-Water supply pipe; 10-Air supply pipe; 11-Air outlet pipe; 12-Through hole; 13-Seal; 14-Drive component; 15-Motor; 16-Coupling; 17-Drive shaft; 18-Air inlet pipe; 19-Second fan hood; 20-Suction pipe; 21-Second impeller; 22-Transmission component; 23-Agitator; 24-First drive wheel; 25-First belt; 26-The... 1. Driven wheel; 27. Rotating shaft; 28. Slot; 29. ​​Linkage component; 30. Connecting shaft; 31. Insert rod; 32. Conical head; 33. Connecting piece; 34. Spring; 35. Magnet; 36. First magnet; 37. Coil; 38. Support seat; 39. Second driving wheel; 40. Second belt; 41. Second driven wheel; 42. Agitating shaft; 43. Agitating frame; 44. Connecting plate; 45. First sealing block; 46. Connecting column; 47. Movable plate; 48. Second sealing block; 49. Movable column; 50. Connecting rod. Detailed Implementation

[0030] 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.

[0031] Please see Figure 1-14 This invention provides a technical solution: a water volume control device for low-temperature start-up of a fuel cell, comprising a control cabinet 1, a cabinet door 2 rotatably mounted on the front side of the control cabinet 1, and a housing 3 fixedly mounted inside the control cabinet 1; it also includes a drying component 4, which includes a first wind shroud 5 fixedly mounted inside the housing 3, the wind shroud being rotatably connected to a first impeller 6, the drying component 4 generating wind power through the rotation of the first impeller 6 to dry the gas passage of the fuel cell; and a humidification component 7, which includes a water storage tank 8 fixedly mounted inside the housing 3, a water supply pipe 9 extending to the outside of the control cabinet 1 connected to the water storage tank 8, the water supply pipe 9 being used to replenish water to the water storage tank 8, and an air supply pipe 10 connected to the first wind shroud 5 connected to the water storage tank 8. The humidification component 7 humidifies the air through the water storage tank 8 and then introduces it into the gas passage of the fuel cell to humidify the fuel cell, and dries the fuel cell through the action of the drying component 4, ensuring that the fuel cell is completely dry. Furthermore, before starting the fuel cell, the humidification component 7 humidifies the fuel cell to prevent dry start-up.

[0032] The drying assembly 4 includes an air outlet pipe 11 connected to the first air shroud 5 and a drive unit 14 connected to the first impeller 6. The air outlet pipe 11 extends to the outside of the control cabinet 1, and the air shroud has a through hole 12, in which a sealing element 13 is installed. When drying the fuel cell, the sealing element 13 seals the air supply pipe 10, while the through hole 12 is open. Therefore, the drive unit 14 drives the first impeller 6 to rotate, thereby delivering air to the fuel cell through the air outlet pipe 11, thus drying the fuel cell.

[0033] The driving component 14 includes a motor 15 fixed inside the housing 3. The output end of the motor 15 is fixedly connected to a coupling 16. One end of the coupling 16 is fixedly connected to a drive shaft 17 fixedly connected to the first impeller 6. The drive shaft 17 is rotatably connected to the first wind cover 5. By starting the motor 15, the motor 15 will drive the coupling 16 to rotate, which in turn will drive the drive shaft 17 to rotate, which in turn will drive the first impeller 6 to rotate.

[0034] The wetting assembly 7 includes an air inlet pipe 18 connected to a water storage tank 8. One end of the air inlet pipe 18 is connected to a second air shroud 19. A second impeller 21 is rotatably connected inside the second air shroud 19, and one end of the second air shroud 19 is connected to an air intake pipe 20. The axis of the second impeller 21 is fixedly connected to a rotating shaft 27 rotatably connected to the second air shroud 19. A slot 28 is provided at the rotating end. A transmission component 22 connected to a drive shaft 17 is connected inside the slot 28. An agitator 23 installed inside the water storage tank 8 is also connected to the rotating shaft 27. The second impeller 21 is driven to rotate by the action of the transmission component 22. At this time, the second impeller 21 generates suction to transport air through the air inlet pipe 18 to the water storage tank 8. During this process, the agitator 23 agitates the water, so that the air and water can be fully mixed and contacted. Therefore, the exhaust air contains a large amount of moisture, thus accelerating the wetting efficiency of the fuel cell.

[0035] The transmission component 22 includes a first drive wheel 24 fixedly connected to the drive shaft 17. A second belt 40 is drivenly connected to the outer surface of the first drive wheel 24. A second driven wheel 41 is drivenly connected to one end of the second belt 40. A connecting shaft 30 rotatably connected to the shaft of the second driven wheel 41 is fixedly connected to the shaft of the second driven wheel 41. A linkage component 29 is installed inside the connecting shaft 30. When the drive shaft 17 rotates, it will drive the first drive wheel 24 to rotate, which will then drive the first belt 25 to rotate, which will then drive the second driven wheel 41 to rotate, which will then drive the connecting shaft 30 to rotate. In turn, the linkage component 29 will drive the rotating shaft 27 to rotate, which will then drive the second impeller 21 to rotate.

[0036] The linkage component 29 includes a support base 38 fixed inside the housing 3. A coil 37 is fixedly connected to the support base 38, and an electromagnet 35 is connected to the coil 37. A magnet 35 is installed on one side of the electromagnet 35. One end of the magnet 35 is fixedly connected to a plug rod 31 that matches the slot 28. The plug rod 31 is slidably connected to the connecting shaft 30, and a tapered head 32 is fixedly connected to one end of the plug rod 31. A connecting piece 33 is fixedly connected to the outer surface of the plug rod 31. The connecting piece 33 is connected to the sealing element 13, and a spring 34 sleeved on the outside of the plug rod 31 is fixedly connected to one end of the connecting piece 33. The other end of 4 is fixedly connected to the connecting shaft 30. When the fuel cell is wetted, the coil 37 is energized, so the electromagnet 35 becomes magnetic, and the magnetism is opposite to that of the magnet 35. Therefore, the magnet 35 is moved, which in turn moves the insertion rod 31, which in turn moves the conical head 32. As a result, the insertion rod 31 is inserted into the slot 28 due to the action of the conical head 32. When the insertion rod 31 moves, it will move the sealing member 13. At this time, the through hole 12 is closed and the gas supply pipe 10 is opened. Therefore, the gas containing water in the water storage tank 8 is transported to the fuel cell through the action of the gas supply pipe 10.

[0037] The agitator 23 includes a second drive wheel 39 fixedly connected to the rotating shaft 27. A second belt 40 is drivenly connected to the outer surface of the second drive wheel 39. A second driven wheel 41 is drivenly connected to the second belt 40. An agitator shaft 42 extending to and rotatably connected to the water storage tank 8 is fixedly connected to the shaft of the second driven wheel 41. An agitator frame 43 is fixedly connected to the outer surface of the agitator shaft 42. When the rotating shaft 27 rotates, it will drive the second drive wheel 39 to rotate, which in turn will drive the second belt 40 to rotate, which in turn will drive the second driven wheel 41 to rotate, which in turn will drive the agitator shaft 42 to rotate, which in turn will drive the agitator frame 43 to rotate, thus agitating the water.

[0038] The sealing element 13 includes a first sealing block 45 for sealing the gas supply pipe 10. A connecting plate 44 is fixedly connected to the first sealing block 45. A connecting column 46 that is slidably connected to the first wind cover 5 is fixedly connected to the connecting plate 44. A movable plate 47 is fixedly connected to one end of the connecting column 46. Multiple sets of second sealing blocks 48 for sealing the through hole 12 are fixedly connected to the movable plate 47. A movable column 49 is fixedly connected to the movable plate 47. A connecting rod 50 that is fixedly connected to the connecting piece 33 is fixedly connected to the top of the movable column 49. When the connecting piece 33 moves, it will drive the connecting rod 50 to move, thus driving the movable column 49 to move, thus driving the movable plate 47 to move, thus driving the second sealing blocks 48 to move, thereby closing the through hole 12. When the movable plate 47 moves, it will drive the connecting column 46 to move, thus driving the connecting plate 44 to move, thus driving the second sealing blocks 48 away from the gas supply pipe 10, thereby opening the gas supply pipe 10.

[0039] During operation, the fuel cell generates a large amount of liquid water in the gas flow channel. When the fuel cell stops working, water accumulates inside. Therefore, starting the motor 15 causes the coupling 16 to rotate, which in turn rotates the drive shaft 17, which in turn rotates the first impeller 6. At this time, the first sealing block 45 seals the gas supply pipe 10, and the second sealing block 48 is away from the through hole 12. Therefore, when the first impeller 6 rotates, it generates airflow, which is blown into the gas channel of the fuel cell through the air outlet 11, thus drying the accumulated water. Once the water is completely dried, the fuel cell will not freeze and expand, damaging the bipolar plates, when exposed to low temperatures. However, during combustion... Before the next start-up of the fuel cell, to avoid static electricity, the membrane electrode assembly (MEA) needs a certain amount of moisture during startup. This prevents the MEA from becoming too dry and affecting the fuel cell's startup. At this time, coil 37 is energized, causing electromagnet 35 to become magnetic, but with a magnetic field opposite to that of magnet 35. This moves magnet 35, which in turn moves insert rod 31. Due to the action of conical head 32, insert rod 31 is inserted into slot 28. The movement of insert rod 31 also moves connecting piece 33, which in turn moves connecting rod 50, which in turn moves movable column 49, which in turn moves movable plate 47, which in turn moves second sealing block 48, thus closing through hole 12. The movement of movable plate 47... This will also cause the first sealing block 45 to move, thus moving it away from the air supply pipe 10 and opening the air supply pipe 10. At this time, the motor 15 is started again, which drives the drive shaft 17 to rotate, thereby driving the first drive wheel 24 to rotate, which in turn drives the first belt 25 to rotate, which in turn drives the first driven wheel 26 to rotate, which in turn drives the connecting shaft 30 to rotate. Since the insertion rod 31 is inserted into the slot 28, the connecting shaft 30 drives the insertion rod 31 to rotate, which in turn drives the rotating shaft 27 to rotate, which in turn drives the second fan wheel 21 to rotate. Therefore, the air will be drawn into the water storage tank 8 through the suction pipe 20. During this process, the rotation of the rotating shaft 27 will drive the second drive wheel 39 to rotate, which in turn drives the second belt 40 to rotate. This drives the second driven wheel 41 to rotate, which in turn drives the stirring shaft 42 to rotate, which in turn drives the stirring frame 43 to rotate, thus making the air and water fully mixed. At this time, the air containing moisture enters the first hood 5 through the air supply pipe 10, and is then transported to the fuel cell by the first impeller 6, thus wetting the membrane electrode assembly (MEA) and facilitating the start-up of the fuel cell. (It should be noted that the water content of the MEA is controlled by monitoring the stack impedance. Since different degrees of wetting of the MEA in the stack correspond to different impedance parameters, the water content can be indirectly reflected by measuring the impedance. When the motor 15 drives the wetting component 7 to run, the motor 15 stops running after the impedance reaches the set value, thereby controlling the water content of the MEA.)

[0040] 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.

[0041] 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 water volume control device for low-temperature start-up of a fuel cell, comprising: A control cabinet (1) is provided with a cabinet door (2) on the front side of the control cabinet (1) and a box (3) is provided inside the control cabinet (1). Its characteristic is that it further includes: The air drying assembly (4) includes a first wind hood (5) installed inside the housing (3), the wind hood being rotatably connected to a first impeller (6), and the air drying assembly (4) using the rotation of the first impeller (6) to generate wind to dry the gas passage of the fuel cell. The wetting assembly (7) includes a water tank (8) installed inside the housing (3), a water supply pipe (9) extending to the outside of the control cabinet (1) is connected to the water tank (8), and an air supply pipe (10) connected to the first hood (5) is connected to the water tank (8). The wetting assembly (7) wets the air through the water tank (8) and then introduces it into the gas channel of the fuel cell to wet the fuel cell. The air drying assembly (4) includes an air outlet pipe (11) connected to the first air hood (5) and a drive unit (14) connected to the first impeller (6). The air outlet pipe (11) extends to the outside of the control cabinet (1), and the air hood is provided with a through hole (12), and a sealing element (13) is installed in the through hole (12). The drive unit (14) includes a motor (15) fixed inside the housing (3). The output end of the motor (15) is fixedly connected to a coupling (16). One end of the coupling (16) is fixedly connected to a drive shaft (17) fixedly connected to the first impeller (6). The drive shaft (17) is rotatably connected to the first wind cover (5). The wetting component (7) includes an air inlet pipe (18) connected to the water storage tank (8). One end of the air inlet pipe (18) is connected to a second wind hood (19). A second impeller (21) is rotatably connected inside the second wind hood (19). One end of the second wind hood (19) is connected to an air suction pipe (20). The axis of the second impeller (21) is fixedly connected to a rotating shaft (27) rotatably connected to the second wind hood (19). A slot (28) is provided at the rotating end. A transmission component (22) connected to the drive shaft (17) is connected inside the slot (28). An agitator (23) installed inside the water storage tank (8) is also connected to the rotating shaft (27).

2. The water volume control device for low-temperature start-up of a fuel cell according to claim 1, characterized in that: The transmission component (22) includes a first drive wheel (24) fixedly connected to the drive shaft (17). A second belt (40) is connected to the outer surface of the first drive wheel (24). A second driven wheel (41) is connected to one end of the second belt (40). A connecting shaft (30) rotatably connected to the housing (3) is fixedly connected to the axis of the second driven wheel (41). A linkage component (29) is installed inside the connecting shaft (30).

3. The water volume control device for low-temperature start-up of a fuel cell according to claim 2, characterized in that: The linkage component (29) includes a support base (38) fixed inside the housing (3), a coil (37) fixedly connected to the support base (38), an electromagnet (35) connected to the coil (37), a magnet (35) installed on one side of the electromagnet (35), a plug rod (31) adapted to the slot (28) fixedly connected to one end of the magnet (35), the plug rod (31) slidably connected to the connecting shaft (30), and a tapered head (32) fixedly connected to one end of the plug rod (31), and a connecting piece (33) fixedly connected to the outer surface of the plug rod (31), the connecting piece (33) connected to the sealing component (13), and a spring (34) sleeved on the outside of the plug rod (31) fixedly connected to one end of the connecting piece (33), and the other end of the spring (34) fixedly connected to the connecting shaft (30).

4. The water volume control device for low-temperature start-up of a fuel cell according to claim 3, characterized in that: The agitator (23) includes a second drive wheel (39) fixedly connected to the rotating shaft (27). A second belt (40) is drivenly connected to the outer surface of the second drive wheel (39). A second driven wheel (41) is drivenly connected to the second belt (40). An agitator shaft (42) extending to the water storage tank (8) and rotatably connected to the water storage tank (8) is fixedly connected to the shaft of the second driven wheel (41). An agitator frame (43) is fixedly connected to the outer surface of the agitator shaft (42).

5. The water volume control device for low-temperature start-up of a fuel cell according to claim 4, characterized in that: The sealing element (13) includes a first sealing block (45) for sealing the gas pipe (10), a connecting plate (44) is fixedly connected to the first sealing block (45), a connecting column (46) is fixedly connected to the connecting plate (44) and slidably connected to the first wind cover (5), a movable plate (47) is fixedly connected to one end of the connecting column (46), a plurality of second sealing blocks (48) for sealing the through hole (12) are fixedly connected to the movable plate (47), a movable column (49) is fixedly connected to the movable plate (47), and a connecting rod (50) fixedly connected to the connecting piece (33) is fixedly connected to one end of the movable column (49).

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