Temperature control circulation device for fuel cell

Abstract

The application discloses a temperature control circulating device of a fuel cell and relates to the technical field of fuel cells.The device comprises a device body, a heat dissipation fan is embedded on the left side of the device body, a fuel cell body is fixed on the inner wall top of the device body, a cooling liquid tank is fixed on the inner wall bottom of the device body, a circulating pump is fixed on the top of the cooling liquid tank, a water cooling pipe is fixed on the top of the circulating pump, and the top surface of the water cooling pipe is in contact with the bottom surface of the fuel cell body.The heating device is arranged, when the temperature control switch detects that the temperature is too low, the temperature control switch, the heater body, the electric push rod and the push plate cooperate to drive the sleeve ring to shield the through port of the wave-shaped sleeve pipe, and the heater body heats the fuel cell body through the electric heating wire and the wave-shaped sleeve pipe, so that the problem that the too low temperature seriously affects the performance and efficiency of the fuel cell is avoided.

Description

Technical Field

[0001] This invention relates to the field of fuel cell technology, specifically to a temperature control and circulation device for a fuel cell. Background Technology

[0002] A fuel cell is a device that converts chemical energy into electrical energy through a chemical reaction between fuel and oxygen. The operating temperature of a fuel cell has a significant impact on its performance; the actual operating temperature must consider not only the cell's performance but also the system's requirements. While generating electricity, a fuel cell also produces heat, which must be dissipated to maintain optimal temperature.

[0003] Utility model patent CN216793741U discloses a fuel cell for a hydrogen fuel cell vehicle with temperature control function. The fuel cell includes a hydrogen fuel cell block, an outer protective shell fixedly installed on the outside of the fuel cell block, and multiple openings on the surface of a heat-conducting copper busbar to assist in heat conduction and dissipation. Multiple openings on the bottom surface of a heat-conducting base plate are also provided, corresponding to the heat-conducting copper busbar for heat conduction. This utility model provides a fuel cell for a hydrogen fuel cell vehicle with temperature control function. The internal heat is transferred downwards through the battery block frame and the heat-conducting base plate, and concentrated onto the heat-conducting copper busbar. Water cooling is achieved through water-cooled grooves and heat dissipation pipes on both sides of the heat-conducting copper busbar, and a water pump facilitates the return of internal coolant. Real-time monitoring, maintenance, and temperature control can be achieved through a temperature gauge on a maintenance cover. The outer protective shell can be quickly opened through the maintenance cover for maintenance of the internal water-cooling equipment.

[0004] However, the current temperature control circulation device has the following problems: the existing fuel cells mainly achieve temperature control by removing the heat discharged by the fuel cell through the cooling water circuit. When the fuel cell is used in areas with low outdoor temperatures, the low temperature will seriously affect the performance and efficiency of the fuel cell and seriously affect the adaptability of the fuel cell. Therefore, we propose a temperature control circulation device for fuel cells. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a temperature control circulation device for fuel cells, which solves the problem mentioned in the background art that existing fuel cells mainly achieve temperature control by removing the heat discharged from the fuel cell through a cooling water circuit. When the fuel cell is used in areas with low outdoor temperatures, excessively low temperatures severely affect the performance and efficiency of the fuel cell.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a temperature control and circulation device for a fuel cell, comprising a main body, a cooling fan embedded on the left side of the main body, a fuel cell body fixed to the top of the inner wall of the main body, a coolant tank fixed to the bottom of the inner wall of the main body, a circulation pump fixed to the top of the coolant tank, a water-cooling pipe fixed to the top of the circulation pump, the top surface of the water-cooling pipe contacting the bottom surface of the fuel cell body, a heating device provided at the bottom of the inner wall of the main body, the heating device comprising a heater body fixed to the bottom of the inner wall of the main body, a corrugated sleeve fixed to the top of the heater body, an opening on the outer side of the corrugated sleeve, a collar fitted and slidably installed on the bottom outer side of the corrugated sleeve, a push plate fixed to the outer side of the collar, the left bottom surface of the push plate fixedly connected to the output end of an electric push rod, the electric push rod fixed to the left side of the heater body, and the top of the heater body... A heating wire is fixed inside the corrugated sleeve. A temperature control switch is installed between the heater body and the coolant tank. The temperature control switch is connected to the circulation pump, the heater body, and the electric push rod via wires. When the temperature control switch detects that the temperature is too low, it activates the electric push rod, which pushes a push plate to block the opening of the corrugated sleeve. The heater body heats the corrugated sleeve through the heating wire, thereby heating the fuel cell body and preventing the problem of excessively low temperature from severely affecting the performance and efficiency of the fuel cell. At the same time, the airflow generated by the cooling fan of the device body blows through the corrugated sleeve, thereby heating the environment around the fuel cell body. When the temperature control switch detects that the temperature is too high, the electric push rod resets the collar and no longer blocks the opening of the corrugated sleeve. The airflow generated by the cooling fan blows air through the opening of the corrugated sleeve, thereby rapidly cooling the corrugated sleeve.

[0007] Preferably, the bottom surface of the water-cooling pipe is provided with a protective device, which includes a support plate fixed to the bottom surface of the fuel cell body. A protective plate is fixed to the bottom of the support plate, and the top of the protective plate is elastically connected to the bottom surface of the water-cooling pipe through a buffer plate. The buffer plate is made of an elastic thermally conductive composite material. The protective plate and the support plate protect the water-cooling pipe, thereby preventing the water-cooling pipe from being deformed by external forces, which would affect the use of the water-cooling pipe. At the same time, under the elastic force of the buffer plate, the buffer plate will buffer the vibration force on the water-cooling pipe, thereby further protecting the water-cooling pipe. The buffer plate also presses the water-cooling pipe, so that the water-cooling pipe is in close contact with the fuel cell body, thereby preventing the water-cooling pipe from detaching from the fuel cell body due to vibration, which would affect the heat dissipation efficiency of the water-cooling pipe to the fuel cell body. At the same time, the buffer plate will absorb the heat of the coolant in the water-cooling pipe, realize rapid heat exchange, and improve the heat dissipation effect.

[0008] Preferably, the bottom surface of the protective plate is provided with a guiding device, which includes an L-shaped abutment rod. The L-shaped abutment rod is slidably installed on the bottom surface of the protective plate. The top of the L-shaped abutment rod contacts the lower outer wall of the buffer plate. The bottom of the L-shaped abutment rod and the top surface of the swing plate are both rough surfaces. The bottom right side of the L-shaped abutment rod contacts the top surface of one end of the swing plate. The other end of the swing plate is hinged to the bottom surface of the protective plate, and a torsion spring is provided between the swing plate and the protective plate. A V-shaped plate is fixed on the bottom surface of the swing plate. The V-shaped plate guides the airflow generated by the cooling fan to both sides, thereby increasing the contact area of ​​the airflow with the fuel cell body and thus improving the heat dissipation effect on the fuel cell body. At the same time, the buffer plate is deformed by the water cooling pipe. The buffer plate pushes the L-shaped abutment rod to slide along the rough surface of the top surface of the swing plate, thereby consuming the force on the buffer plate and improving the buffering effect on the water cooling pipe.

[0009] Preferably, a leak-proof device is provided above the circulating pump. The leak-proof device includes a rubber sealing ring, which is fixed to the outside of the connection between the circulating pump and the water-cooling pipe. A pressing plate is fixed to the top of the rubber sealing ring, and the pressing plate is sleeved and slidably installed on the outside of the water-cooling pipe. The end of the swing plate away from the hinge axis of the protective plate contacts the top surface of the pressing plate. A sliding plate is fixed to the top of the pressing plate by a spring. The sliding plate is sleeved and slidably installed on the outside of the water-cooling pipe, and the top surface of the sliding plate contacts the bottom surface of the water-cooling pipe. Under the spring force corresponding to the sliding plate and the pressing plate, the spring drives the sliding plate and the pressing plate to press the rubber sealing ring and the water-cooling pipe respectively, thereby making the water-cooling pipe more stable during use. At the same time, the L-shaped abutment rod pushes the swing plate to swing downward. The swing plate further presses the rubber sealing ring by abutting the top of the pressing plate, thereby avoiding the water-cooling pipe from being vibrated, which could lead to coolant leakage at the connection between the water-cooling pipe and the circulating pump.

[0010] This invention provides a temperature control circulation device for a fuel cell. It has the following beneficial effects:

[0011] (1) By setting up a heating device, when the temperature control switch detects that the temperature is too low, the temperature control switch, the heater body, the electric push rod and the push plate work together to drive the collar to block the opening of the corrugated sleeve. The heater body heats the fuel cell body through the heating wire and the corrugated sleeve, thereby avoiding the problem that the low temperature will seriously affect the performance and efficiency of the fuel cell. When the temperature control switch detects that the temperature is too high, the temperature control switch, the electric push rod and the collar no longer block the opening of the corrugated sleeve. The airflow generated by the cooling fan blows air into the inside of the corrugated sleeve through the opening of the corrugated sleeve, thereby making the corrugated sleeve cool down quickly.

[0012] (2) The present invention, through the setting of the protective device, enables the protective plate and the support plate to work together to protect the water-cooled pipe, thereby avoiding the problem of the water-cooled pipe wall being dented and deformed due to external force, which would affect the use of the water-cooled pipe; at the same time, under the action of the buffer plate, the buffer plate will buffer the vibration force on the water-cooled pipe, thereby further protecting the water-cooled pipe. At the same time, the buffer plate presses the water-cooled pipe, thereby making the water-cooled pipe close to the fuel cell body, thus avoiding the problem of the water-cooled pipe detaching from the fuel cell body due to vibration, which would affect the heat dissipation efficiency of the water-cooled pipe to the fuel cell body; at the same time, the buffer plate will absorb the heat of the coolant in the water-cooled pipe, realize rapid heat exchange, and improve the heat dissipation effect.

[0013] (3) The present invention, through the setting of the guide device, guides the airflow generated by the cooling fan to both sides of the V-shaped plate, thereby increasing the contact area of ​​the airflow with the fuel cell body and thus improving the heat dissipation effect on the fuel cell body. At the same time, the water cooling pipe and the buffer plate work together to push the bottom rough surface of the L-shaped contact rod to slide along the top rough surface of the swing plate, thereby consuming the force on the buffer plate by the L-shaped contact rod, thereby improving the buffering effect on the water cooling pipe.

[0014] (4) The present invention, through the setting of the anti-leakage device, enables the springs corresponding to the sliding plate and the pressing plate to drive the sliding plate and the pressing plate to press the rubber sealing ring and the water cooling pipe respectively, thereby making the water cooling pipe more stable during use. At the same time, the L-shaped abutment rod and the swing plate cooperate to make the top surface of the swing plate abut against the pressing plate to further press the rubber sealing ring, thereby avoiding the water cooling pipe from being vibrated, which would cause the coolant to leak at the connection between the water cooling pipe and the circulating pump. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the entire invention;

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

[0017] Figure 3 This is a schematic diagram of the heating device of the present invention;

[0018] Figure 4 For the present invention Figure 3 An enlarged schematic diagram of the structure at point A;

[0019] Figure 5 This is a schematic diagram of the protective device of the present invention;

[0020] Figure 6 This is a schematic diagram of the guiding device of the present invention;

[0021] Figure 7 This is a schematic diagram of the leak prevention device of the present invention.

[0022] In the diagram: 1. Main body of the device; 2. Main body of the fuel cell; 3. Coolant tank; 4. Circulation pump; 5. Water cooling pipe; 6. Heating device; 61. Heater body; 62. Electric push rod; 63. Push plate; 64. Corrugated sleeve; 641. Through port; 65. Collar; 66. Heating wire; 7. Protective device; 71. Support plate; 72. Protective plate; 73. Buffer plate; 8. Leakage prevention device; 81. Rubber sealing ring; 82. Pressing plate; 83. Slide plate; 9. Guide device; 91. L-shaped abutment rod; 92. Swing plate; 93. V-shaped plate. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0024] Please see Figure 1-7This invention provides a technical solution: a temperature control and circulation device for a fuel cell, comprising a device body 1, a cooling fan embedded on the left side of the device body 1, a fuel cell body 2 fixed to the top of the inner wall of the device body 1, a coolant tank 3 fixed to the bottom of the inner wall of the device body 1, a circulation pump 4 fixed to the top of the coolant tank 3, a water-cooling pipe 5 fixed to the top of the circulation pump 4, the top surface of the water-cooling pipe 5 contacting the bottom surface of the fuel cell body 2, and a heating device 6 provided at the bottom of the inner wall of the device body 1, the heating device 6 comprising a heater body 61. The heater body 61 is fixed to the bottom of the inner wall of the device body 1. A corrugated sleeve 64 is fixed to the top of the heater body 61. An opening 641 is provided on the outer side of the corrugated sleeve 64. A collar 65 is fitted and slidably installed on the outer side of the bottom of the corrugated sleeve 64. A push plate 63 is fixed to the outer side of the collar 65. The bottom left side of the push plate 63 is fixedly connected to the output end of the electric push rod 62. The electric push rod 62 is fixed to the left side of the heater body 61. A heating wire 66 is fixed to the top of the heater body 61. The heating wire 66 is set in the corrugated sleeve 64. Internally, a temperature control switch is installed between the heater body 61 and the coolant tank 3. The temperature control switch is connected to the circulation pump 4, the heater body 61, and the electric push rod 62 via wires. When the temperature control switch detects that the temperature is too low, it activates the electric push rod 62, which pushes the push plate 63 to drive the collar 65 to block the opening 641 of the corrugated sleeve 64. The heater body 61 heats the corrugated sleeve 64 through the heating wire 66, thereby heating the fuel cell body 2 through the corrugated sleeve 64, thus preventing serious damage from excessively low temperatures. The problem affects the performance and efficiency of the fuel cell; at the same time, the airflow generated by the cooling fan of the main body 1 blows the corrugated sleeve 64, thereby heating the environment around the fuel cell main body 2; when the temperature control switch detects that the temperature is too high, the electric push rod 62 drives the collar 65 to reset and no longer blocks the opening 641 of the corrugated sleeve 64. The airflow generated by the cooling fan blows air into the inside of the corrugated sleeve 64 through the opening 641 of the corrugated sleeve 64, thereby making the corrugated sleeve 64 cool down quickly.

[0025] A protective device 7 is provided on the bottom surface of the water-cooling pipe 5. The protective device 7 includes a support plate 71, which is fixed to the bottom surface of the fuel cell body 2. A protective plate 72 is fixed to the bottom of the support plate 71. The top of the protective plate 72 is elastically connected to the bottom surface of the water-cooling pipe 5 through a buffer plate 73. The buffer plate 73 is made of an elastic thermally conductive composite material. The protective plate 72 and the support plate 71 protect the water-cooling pipe 5, thereby preventing the water-cooling pipe 5 from being deformed by external forces, which would affect the use of the water-cooling pipe 5. Under the elastic force of the buffer plate 73, the buffer plate 73 will buffer the vibration force on the water-cooling pipe 5, thereby further protecting the water-cooling pipe 5. At the same time, the buffer plate 73 will press the water-cooling pipe 5, so that the water-cooling pipe 5 is in close contact with the fuel cell body 2, thereby preventing the water-cooling pipe 5 from detaching from the fuel cell body 2 due to vibration, which would affect the heat dissipation efficiency of the water-cooling pipe 5 to the fuel cell body 2. At the same time, the buffer plate 73 will absorb the heat of the coolant in the water-cooling pipe 5, realize rapid heat exchange, and improve the heat dissipation effect.

[0026] A guide device 9 is provided on the bottom surface of the protective plate 72. The guide device 9 includes an L-shaped abutment rod 91, which is slidably mounted on the bottom surface of the protective plate 72. The top of the L-shaped abutment rod 91 contacts the lower outer wall of the buffer plate 73. The bottom of the L-shaped abutment rod 91 and the top surface of the swing plate 92 are both rough surfaces. The bottom right side of the L-shaped abutment rod 91 contacts the top surface of one end of the swing plate 92. The other end of the swing plate 92 is hinged to the bottom surface of the protective plate 72, and a torsion bar is provided between the swing plate 92 and the protective plate 72. A V-shaped plate 93 is fixed to the bottom surface of the swing plate 92. The V-shaped plate 93 guides the airflow generated by the cooling fan to both sides, thereby increasing the contact area of ​​the airflow with the fuel cell body 2 and thus improving the heat dissipation effect on the fuel cell body 2. At the same time, the buffer plate 73 is deformed by the water cooling pipe 5. The buffer plate 73 pushes the L-shaped abutment rod 91 to slide along the rough surface of the top surface of the swing plate 92, thereby consuming the force on the buffer plate 73 and improving the buffering effect on the water cooling pipe 5.

[0027] A leak-proof device 8 is installed above the circulating pump 4. The leak-proof device 8 includes a rubber sealing ring 81, which is fixed to the outside of the connection between the circulating pump 4 and the water-cooling pipe 5. A pressure plate 82 is fixed to the top of the rubber sealing ring 81, and the pressure plate 82 is sleeved and slidably installed on the outside of the water-cooling pipe 5. The end of the swing plate 92 away from the hinge axis of the protective plate 72 contacts the top surface of the pressure plate 82. A sliding plate 83 is fixed to the top of the pressure plate 82 by a spring. The sliding plate 83 is sleeved and slidably installed on the outside of the water-cooling pipe 5. When the surface of the sliding plate 83 contacts the bottom surface of the water-cooling pipe 5, the spring force of the corresponding springs of the sliding plate 83 and the pressing plate 82 causes the spring to drive the sliding plate 83 and the pressing plate 82 to press the rubber sealing ring 81 and the water-cooling pipe 5 respectively, thereby making the water-cooling pipe 5 more stable during use. At the same time, the L-shaped abutment rod 91 pushes the swing plate 92 to swing downward. The swing plate 92 further presses the rubber sealing ring 81 by abutting the top surface of the pressing plate 82, thereby preventing the water-cooling pipe 5 from being vibrated, which could lead to coolant leakage at the connection between the water-cooling pipe 5 and the circulating pump 4.

[0028] In use, when the fuel cell body 2 is in a low-temperature environment, a temperature control switch between the heater body 61 and the coolant tank 3 detects that the temperature is too low. The temperature control switch activates the heater body 61 and the electric push rod 62 via a wire. The electric push rod 62 pushes the push plate 63, causing the collar 65 to move upward along the outer wall of the corrugated sleeve 64. The collar 65 blocks the opening 641 of the corrugated sleeve 64. The heater body 61 heats the heating wire 66, which in turn heats the corrugated sleeve 64, thus allowing the corrugated sleeve 64 to heat the fuel cell body 2. This avoids the problem of excessively low temperature severely affecting the performance and efficiency of the fuel cell. At the same time, the airflow generated by the cooling fan of the device body 1 also affects the corrugated sleeve 64. The sleeve 64 is blown, thereby heating the environment around the fuel cell body 2. When the temperature control switch detects that the temperature is too high, the temperature control switch stops activating the heater body 61 and the electric push rod 62. The electric push rod 62 drives the collar 65 to reset and no longer blocks the opening 641 of the corrugated sleeve 64. At this time, the airflow generated by the cooling fan blows air into the inside of the corrugated sleeve 64 through the opening 641 of the corrugated sleeve 64, thereby rapidly cooling the corrugated sleeve 64. At the same time, the temperature control switch starts the circulation pump 4 through the wire. The circulation pump 4 pumps the coolant in the coolant tank 3 to the water cooling pipe 5 to dissipate heat from the fuel cell body 2, thereby achieving the purpose of temperature control of the fuel cell body 2.

[0029] Meanwhile, when unexpected vibrations occur during the use of the fuel cell body 2, the protective plate 72 and the support plate 71 will protect the water-cooling pipe 5, thereby preventing the water-cooling pipe 5 from being deformed due to external forces, which would affect its use. At the same time, under the elastic force of the buffer plate 73, the buffer plate 73 will press the water-cooling pipe 5, so that the water-cooling pipe 5 is in close contact with the fuel cell body 2, thereby preventing the water-cooling pipe 5 from detaching from the fuel cell body 2 due to vibration, which would affect the heat dissipation efficiency of the water-cooling pipe 5 to the fuel cell body 2. At the same time, the buffer plate 73 will buffer the vibration force on the water-cooling pipe 5, thereby further protecting the water-cooling pipe 5. In addition, the buffer plate 73 will absorb the heat of the coolant in the water-cooling pipe 5, realize rapid heat exchange, and improve the heat dissipation effect.

[0030] The V-shaped plate 93 guides the airflow generated by the cooling fan to both sides, thereby increasing the contact area of ​​the airflow with the fuel cell body 2 and thus improving the heat dissipation effect on the fuel cell body 2. At the same time, when the water cooling pipe 5 is vibrated and detaches from the fuel cell body 2, the buffer plate 73 is squeezed and deformed. The arc surface of the buffer plate 73 pushes the top of the L-shaped abutment rod 91, causing the L-shaped abutment rod 91 to move downward. The rough surface of the bottom of the L-shaped abutment rod 91 slides along the rough surface of the top surface of the swing plate 92, thereby consuming the force on the buffer plate 73, thus improving the buffering effect on the water cooling pipe 5.

[0031] Simultaneously, under the spring force corresponding to the sliding plate 83 and the pressing plate 82, the spring causes the sliding plate 83 and the pressing plate 82 to press the rubber sealing ring 81 and the water cooling pipe 5 respectively, thereby making the water cooling pipe 5 more stable during use. At the same time, when the bottom rough surface of the L-shaped abutment rod 91 slides along the top rough surface of the swing plate 92, the L-shaped abutment rod 91 pushes the swing plate 92 downward. The swing plate 92 further presses the rubber sealing ring 81 by abutting the top surface of the pressing plate 82, thereby avoiding the water cooling pipe 5 from being vibrated, which could lead to the problem of coolant leakage at the connection between the water cooling pipe 5 and the circulating pump 4.

[0032] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A temperature control circulation device for a fuel cell, comprising a device body (1), a cooling fan embedded on the left side of the device body (1), a fuel cell body (2) fixed to the top of the inner wall of the device body (1), a coolant tank (3) fixed to the bottom of the inner wall of the device body (1), a circulation pump (4) fixed to the top of the coolant tank (3), a water-cooling pipe (5) fixed to the top of the circulation pump (4), the top surface of the water-cooling pipe (5) contacting the bottom surface of the fuel cell body (2), characterized in that: A heating device (6) is provided at the bottom of the inner wall of the main body (1) of the device. The heating device (6) includes a heater body (61). The heater body (61) is fixed at the bottom of the inner wall of the main body (1). A corrugated sleeve (64) is fixed at the top of the heater body (61). An opening (641) is provided on the outer side of the corrugated sleeve (64). A collar (65) is sleeved and slidably installed on the bottom outer side of the corrugated sleeve (64). A push plate (63) is fixed on the outer side of the collar (65). The bottom left side of the push plate (63) is fixedly connected to the output end of the electric push rod (62). The electric push rod (62) is fixed on the left side of the heater body (61). A heating wire (66) is fixed at the top of the heater body (61). The heating wire (66) is located inside the corrugated sleeve (64). A temperature control switch is provided between the heater body (61) and the coolant tank (3), and the temperature control switch is connected to the circulating pump (4), the heater body (61) and the electric push rod (62) by wires; The temperature control switch can activate the electric push rod (62), which pushes the push plate (63) to drive the collar (65) to block the opening (641) of the corrugated sleeve (64).

2. The temperature control and circulation device for a fuel cell according to claim 1, characterized in that: The bottom surface of the water-cooled pipe (5) is provided with a protective device (7), which includes a support plate (71). A protective plate (72) is fixed to the bottom of the support plate (71), and the top of the protective plate (72) is elastically connected to the bottom surface of the water-cooled pipe (5) through a buffer spring plate (73).

3. The temperature control and circulation device for a fuel cell according to claim 2, characterized in that: The buffer plate (73) is an elastic thermally conductive composite material.

4. The temperature control circulation device for a fuel cell according to claim 3, characterized in that: The bottom surface of the protective plate (72) is provided with a guide device (9), which includes an L-shaped abutment rod (91). The L-shaped abutment rod (91) is slidably installed on the bottom surface of the protective plate (72). The bottom right side of the L-shaped abutment rod (91) contacts the top surface of one end of the swing plate (92). The other end of the swing plate (92) is hinged to the bottom surface of the protective plate (72). A torsion spring is provided between the swing plate (92) and the protective plate (72). A V-shaped plate (93) is fixed on the bottom surface of the swing plate (92).

5. The temperature control and circulation device for a fuel cell according to claim 4, characterized in that: The top of the L-shaped abutment rod (91) contacts the lower outer wall of the buffer plate (73), and the bottom of the L-shaped abutment rod (91) and the top surface of the swing plate (92) are both rough surfaces.

6. The temperature control circulation device for a fuel cell according to claim 5, characterized in that: A leak prevention device (8) is provided above the circulating pump (4). The leak prevention device (8) includes a rubber sealing ring (81). The rubber sealing ring (81) is fixed on the outside of the connection between the circulating pump (4) and the water cooling pipe (5). A pressing plate (82) is fixed on the top of the rubber sealing ring (81). The pressing plate (82) is sleeved and slidably installed on the outside of the water cooling pipe (5). A sliding plate (83) is fixed on the top of the pressing plate (82) by a spring. The sliding plate (83) is sleeved and slidably installed on the outside of the water cooling pipe (5). The top surface of the sliding plate (83) is in contact with the bottom surface of the water cooling pipe (5).

7. The temperature control circulation device for a fuel cell according to claim 6, characterized in that: The end of the swing plate (92) away from the hinge axis of the protective plate (72) contacts the top surface of the pressing plate (82).

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