A battery system for an airport tug

Abstract

The application relates to the field of batteries, and discloses an airport tractor battery system, which comprises a shell, the inner wall of the shell is fixedly connected with a supporting rod, the upper surface of the supporting rod is fixedly connected with a supporting plate, the lower surface of the supporting plate is fixedly connected with a hollow channel steel, the upper surface of the supporting plate is fixedly connected with a battery pack, the upper surface of the battery pack is provided with a circuit board one, the upper surface of the battery pack is provided with a circuit board two, the upper surface of the circuit board one is provided with a relay two, the upper surface of the circuit board two is provided with a relay one, and the outer wall of the relay two is provided with a plug. Through the reciprocating swing of the heat dissipation fans one and two, the air flow generated by the heat dissipation fans one and two can cover a wider area, the heat generated by different parts of the battery pack and the relay two can be effectively taken away, the temperature in the whole space is more uniform, and the local overheating condition is reduced.

Description

Technical Field

[0001] This invention relates to the field of battery technology, specifically to a battery system for airport tractors. Background Technology

[0002] Specifically designed for towing aircraft, these aircraft typically possess strong traction and precise handling capabilities, enabling them to safely move aircraft in various areas such as airport runways, taxiways, and aprons. This includes towing aircraft from parking positions to runways for takeoff or from runways to parking positions.

[0003] Airport towing vehicles require rapid start-stop operations and generate high power during short charging and discharging cycles. To mitigate the accelerated aging of lithium batteries due to high temperatures or the risk of spontaneous combustion, the heat dissipation performance of lithium batteries is crucial. Therefore, a battery system with excellent heat dissipation is needed.

[0004] In the existing technology, the cooling fan used for heat dissipation operates in a fixed position, and the airflow it blows can only cover specific areas of the battery pack and relay circuit board, causing heat to accumulate in other areas and resulting in localized overheating. This will accelerate the aging of local batteries, reduce the overall performance and lifespan of the batteries, and may also damage some components on the relay circuit board due to overheating, affecting their normal operation. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a battery system for airport tractors, which solves the problem that in existing technologies, the cooling fan used for heat dissipation operates in a fixed position, and the airflow can only cover specific areas of the battery pack and relay circuit board, leading to heat accumulation in other areas and localized overheating.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A battery system for an airport tractor includes a housing, a support rod fixedly connected to the inner wall of the housing, a support plate fixedly connected to the upper surface of the support rod, a hollow channel steel fixedly connected to the lower surface of the support plate, a battery pack fixedly connected to the upper surface of the support plate, a circuit board one disposed on the upper surface of the battery pack, a circuit board two disposed on the upper surface of the battery pack, a relay two disposed on the upper surface of the circuit board one, a relay one disposed on the upper surface of the circuit board two, a connector disposed on the outer wall of the relay two, a relay housing fixedly connected to the upper surface of the housing, a mounting plate disposed on the outer wall of the battery pack, a rectangular frame one disposed between the battery pack and the circuit board one, a dynamic heat dissipation mechanism disposed on the inner wall of the rectangular frame one, an auxiliary heat dissipation mechanism disposed on the inner wall of the rectangular frame one, and a static heat dissipation mechanism disposed on the inner wall of the rectangular frame one.

[0008] Preferably, the dynamic heat dissipation mechanism includes a motor, one end of which is fixedly connected to the inner wall of the rectangular frame, and the output end of the motor is fixedly connected to a rotating shaft. The outer wall of the rectangular frame has a ventilation hole one, a ventilation hole two, and a rectangular hole.

[0009] Preferably, the dynamic heat dissipation mechanism further includes a disc, one end of which is fixedly connected to the end of the rotating shaft away from the motor. A pin is fixedly connected to the end of the disc away from the rotating shaft. A rectangular frame is slidably connected to the outer wall of the pin. A long sliding column is fixedly connected to the outer wall of the rectangular frame. A rectangular block is fixedly connected to the other end of the long sliding column. The outer wall of the rectangular block is slidably connected to the inner wall of the rectangular hole. A rack is fixedly connected to the outer wall of the rectangular block. A gear is meshed with the tooth end of the rack. A rotating rod is fixedly connected inside the gear. The outer wall of the rotating rod is rotatably connected to the inside of the rectangular frame. A cooling fan is fixedly connected to the end of the rotating rod away from the gear.

[0010] Preferably, the dynamic heat dissipation mechanism further includes a rack two, the outer wall of which is fixedly connected to the outer wall of the rectangular block, the tooth ends of the rack two are meshed with a gear three, the inside of the gear three is fixedly connected to a rotating rod two, the end of the rotating rod two away from the gear three is fixedly connected to a cooling fan two, and the outer wall of the rotating rod two is rotatably connected to the inside of the rectangular frame one.

[0011] Preferably, the outer wall of the long sliding column is slidably connected to a U-shaped frame, and the outer wall of the U-shaped frame is fixedly connected to the inner wall of the rectangular frame.

[0012] Preferably, the auxiliary heat dissipation mechanism includes a second U-shaped frame, the outer wall of which is fixedly connected to the inner wall of a first rectangular frame, a third rotating rod is rotatably connected inside the second U-shaped frame, and a fan blade is fixedly connected to the outer wall of the third rotating rod.

[0013] Preferably, the auxiliary heat dissipation mechanism further includes a passive gear, the inner wall of which is fixedly connected to the outer wall of the rotating rod three, the tooth end of which is meshed with a driving gear, and the inner wall of which is fixedly connected to the outer wall of the rotating shaft.

[0014] Preferably, the static heat dissipation mechanism includes thermally conductive rubber, the outer wall of which is fixedly connected to the inner wall of the rectangular frame, and a copper guide post is fixedly connected to the outer wall of the thermally conductive rubber, the outer wall of which is fixedly connected to the interior of the rectangular frame.

[0015] Preferably, the static heat dissipation mechanism further includes a fixing plate, the outer wall of which is fixedly connected to the outer wall of the thermally conductive rubber, and the outer wall of the fixing plate has a circular hole.

[0016] Preferably, the static heat dissipation mechanism further includes heat sinks, the outer wall of which is fixedly connected to the outer wall of the fixed plate.

[0017] Working principle: When the motor starts, the motor drives the rotating shaft to rotate, which in turn causes the disc to rotate. The rotation of the disc causes the pin to rotate and slide on the inner wall of the second rectangular frame. The second rectangular frame causes the long sliding column to move back and forth inside the first U-shaped frame, and drives the rectangular block to move back and forth and slide on the inner wall of the rectangular hole. During the reciprocating movement of the rectangular block, the rectangular block drives the rack to move back and forth. The reciprocating movement of the rack causes the gear 2 that meshes with it to rotate back and forth, which in turn drives the rotating rod 1 to rotate back and forth inside the first rectangular frame, and drives the running cooling fan 1 to swing back and forth. At the same time, the reciprocating movement of the rectangular block also drives the rack 2 to move back and forth, which in turn causes the gear 3 to drive the rotating rod 2 to rotate back and forth, thus causing the running cooling fan 2 to swing back and forth.

[0018] During the motor startup process, the motor drives the shaft to rotate, which in turn drives the drive gear to rotate. The drive gear, in turn, drives the rod three to rotate inside the U-shaped frame two via the driven gear, which in turn drives the fan blades to rotate. The rotation of the fan blades promotes airflow and accelerates the dissipation of heat to the external environment.

[0019] This invention provides a battery system for airport tractors. It has the following advantages:

[0020] 1. The present invention, through the reciprocating oscillation of cooling fan one and cooling fan two, can make the airflow generated by cooling fan one and cooling fan two cover a wider area, effectively removing the heat generated by different parts of the battery pack and relay two, making the temperature in the whole space more uniform and reducing local overheating.

[0021] 2. This invention promotes airflow by rotating the fan blades of the auxiliary heat dissipation mechanism. The heat-conducting rubber, heat sink, and copper guide post in the static heat dissipation mechanism conduct heat out of the battery pack and circuit board one. The two work together to form an efficient heat dissipation channel from the inside of the battery pack and relay two to the outside, which improves heat dissipation efficiency and can more effectively control the temperature of the battery system.

[0022] 3. By incorporating thermally conductive rubber, this invention can fill the tiny gaps between the battery pack and the circuit board, ensuring a smooth heat transfer path and preventing increased thermal resistance due to air gaps. Simultaneously, it can also act as a shock absorber, reducing damage to the battery system caused by vehicle vibrations and improving the system's stability and reliability.

[0023] 4. The present invention uses a support plate as the load-bearing structure of the upper battery pack to support the battery pack. The hollow channel steel adopts a hollow design, which is conducive to heat dissipation and weight reduction. Under the premise of ensuring a certain strength and rigidity, the overall weight of the battery pack can be significantly reduced. Attached Figure Description

[0024] Figure 1 This is a perspective view of the present invention;

[0025] Figure 2 This is a partial structural diagram of the support rod of the present invention;

[0026] Figure 3 This is a partial structural diagram of the support plate of the present invention;

[0027] Figure 4 This is a partial structural diagram of the battery pack of the present invention;

[0028] Figure 5 This is a partial structural diagram of the mounting plate of the present invention;

[0029] Figure 6 This is a partial structural diagram of the thermally conductive rubber of the present invention;

[0030] Figure 7 This is a partial structural diagram of the U-shaped frame of the present invention;

[0031] Figure 8 This is a schematic diagram of a partial structure of the fan blade of the present invention.

[0032] The components include: 1. Housing; 2. Support rod; 3. Support plate; 4. Hollow channel steel; 5. Battery pack; 6. Heat sink; 7. Circuit board one; 8. Circuit board two; 9. Relay one; 10. Connector; 11. Round hole; 12. Relay two; 13. Relay housing; 14. Mounting plate; 15. Rectangular frame one; 16. Ventilation hole one; 17. Ventilation hole two; 18. Rectangular hole; 19. Motor; 20. Shaft; 21. Disc; 22. Circular... 23. Pin; 24. Rectangular frame 2; 25. Long sliding column; 26. Rectangular block; 27. U-shaped frame 1; 28. Rack 1; 29. ​​Gear 2; 30. Rotating rod 1; 31. Cooling fan 1; 32. Rack 2; 33. Gear 3; 34. Rotating rod 2; 35. Driving gear; 36. Driven gear; 37. Rotating rod 3; 38. U-shaped frame 2; 39. Fan blade; 40. Thermally conductive rubber; 41. Copper guide post; 42. Fixing plate. Detailed Implementation

[0033] The technical solution of the present invention will now be clearly and completely described 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.

[0034] Please see the appendix Figure 1 - Appendix Figure 4 This invention provides a battery system for an airport tractor, comprising a housing 1, a support rod 2 fixedly connected to the inner wall of the housing 1, a support plate 3 fixedly connected to the upper surface of the support rod 2, a hollow channel steel 4 fixedly connected to the lower surface of the support plate 3, a battery pack 5 fixedly connected to the upper surface of the support plate 3, a circuit board 7 on the upper surface of the battery pack 5, a circuit board 8 on the upper surface of the circuit board 7, a relay 12 on the upper surface of the battery pack 5, a relay 9 on the upper surface of the circuit board 8, a connector 10 on the outer wall of the relay 12, a relay housing 13 fixedly connected to the upper surface of the housing 1, a mounting plate 14 on the outer wall of the battery pack 5, a rectangular frame 15 between the battery pack 5 and the circuit board 7, a dynamic heat dissipation mechanism, an auxiliary heat dissipation mechanism, and a static heat dissipation mechanism on the inner wall of the rectangular frame 15.

[0035] Specifically, relay 9 and relay 12 are integrated with circuit boards 8 and 7 on the top of battery pack 5. A heat dissipation space layer is left between battery pack 5, circuit board 7, and relay 12, and a dynamic heat dissipation mechanism, an auxiliary heat dissipation mechanism, and a dynamic heat dissipation mechanism are set to dissipate the heat generated by battery pack 5 and relay 12. At the same time, a heat dissipation gap is left between the upper and lower battery packs 5. In addition, the support plate 3 is used as the load-bearing structure of the upper battery pack 5 to better support the battery pack 5. The hollow channel steel 4 has a hollow design, which is conducive to heat dissipation and weight reduction. While ensuring a certain strength and rigidity, it can significantly reduce the overall weight of battery pack 5. The hollow structure of the hollow channel steel 4 provides an air circulation channel, which helps the heat dissipation of battery pack 5. During the operation of battery pack 5, the heat generated can be carried away by the air flow in the hollow channel steel 4, reducing the temperature of battery pack 5 and improving battery performance and life.

[0036] Please see the appendix Figure 4 Appendix Figure 6 Appendix Figure 7 and attached Figure 8The dynamic heat dissipation mechanism includes a motor 19, one end of which is fixedly connected to the inner wall of a rectangular frame 15. A rotating shaft 20 is fixedly connected to the output end of the motor 19. Ventilation holes 16 and 17 are provided on the outer wall of the rectangular frame 15, as well as a rectangular hole 18. The dynamic heat dissipation mechanism also includes a disc 21, one end of which is fixedly connected to the end of the rotating shaft 20 away from the motor 19. A pin 22 is fixedly connected to the end of the disc 21 away from the rotating shaft 20. A rectangular frame 23 is slidably connected to the outer wall of the pin 22. A long sliding column 24 is fixedly connected to the outer wall of the rectangular frame 23. A rectangular block 25 is fixedly connected to the other end of the long sliding column 24. The outer wall of the rectangular block 25 is slidably connected to the inner wall of the rectangular hole 18. The outer wall of the rectangular block 25 is fixedly connected to... The dynamic cooling mechanism includes a rack 27, with a gear 28 meshing at the tooth end of the rack 27. A rotating rod 29 is fixedly connected inside the gear 28, and the outer wall of the rotating rod 29 is rotatably connected to the inside of a rectangular frame 15. A cooling fan 30 is fixedly connected to the end of the rotating rod 29 away from the gear 28. The dynamic cooling mechanism also includes a rack 31, with its outer wall fixedly connected to the outer wall of a rectangular block 25. A gear 32 meshes at the tooth end of the rack 31, with a rotating rod 33 fixedly connected inside the gear 32. A cooling fan 34 is fixedly connected to the end of the rotating rod 33 away from the gear 32, and the outer wall of the rotating rod 33 is rotatably connected to the inside of a rectangular frame 15. A U-shaped frame 26 is slidably connected to the outer wall of a long sliding column 24, and the outer wall of the U-shaped frame 26 is fixedly connected to the inner wall of a rectangular frame 15.

[0037] Specifically, when motor 19 starts, motor 19 drives shaft 20 to rotate, which in turn causes disk 21 to rotate. The rotation of disk 21 causes pin 22 to rotate and slide on the inner wall of rectangular frame 23. Rectangular frame 23 causes long sliding column 24 to move and slide back and forth inside U-shaped frame 26, and drives rectangular block 25 to move back and forth and slide on the inner wall of rectangular hole 18. During the reciprocating movement of rectangular block 25, rectangular block 25 drives rack 27 to move back and forth. The reciprocating movement of rack 27 causes gear 28, which meshes with it, to rotate back and forth, which in turn drives rotating rod 29 to rotate back and forth inside rectangular frame 15. The reciprocating motion of the cooling fan 30, while the rectangular block 25 moves back and forth, also drives the rack 31 to move back and forth. This, in turn, causes the gear 32 to drive the rotating rod 33 to rotate back and forth, thus causing the cooling fan 34 to oscillate back and forth. The reciprocating motion of the cooling fans 30 and 34 allows the airflow generated by them to cover a wider area, effectively removing heat generated by different parts of the battery pack 5 and relay 12, resulting in a more uniform temperature throughout the space and reducing localized overheating. The reciprocating motion of the cooling fans 30 and 34 continuously changes the direction and speed of airflow, creating a complex airflow field. This enhances heat exchange between the air and the surfaces of the battery pack 5, relay 12, and static heat dissipation components, thereby more effectively transferring heat into the air and expelling it.

[0038] Please see the appendix Figure 4 Appendix Figure 6 Appendix Figure 7 and attached Figure 8 The auxiliary heat dissipation mechanism includes a U-shaped frame 38, the outer wall of which is fixedly connected to the inner wall of the rectangular frame 15. A rotating rod 37 is rotatably connected inside the U-shaped frame 38, and a fan blade 39 is fixedly connected to the outer wall of the rotating rod 37. The auxiliary heat dissipation mechanism also includes a driven gear 36, the inner wall of which is fixedly connected to the outer wall of the rotating rod 37. The tooth end of the driven gear 36 is meshed with a driving gear 35, and the inner wall of the driving gear 35 is fixedly connected to the outer wall of the rotating shaft 20.

[0039] Specifically, during the startup of motor 19, motor 19 drives shaft 20 to rotate. The rotation of shaft 20 drives drive gear 35 to rotate. The rotation of drive gear 35 drives rod 37 to rotate inside U-shaped frame 38 via driven gear 36, which in turn drives fan blade 39 to rotate. The rotation of fan blade 39 promotes airflow, accelerating heat dissipation to the external environment. The thermally conductive rubber 40, heat sink 6, and copper guide post 41 in the static heat dissipation mechanism conduct heat from battery pack 5 and circuit board 7. The auxiliary heat dissipation mechanism, through the rotation of fan blade 39, promotes airflow and accelerates heat dissipation to the outside. The two work together to form a highly efficient heat dissipation channel from inside battery pack 5 and relay 12 to the outside, improving heat dissipation efficiency and enabling more effective control of battery system temperature. The airflow of the auxiliary heat dissipation mechanism can compensate for insufficient heat dissipation in certain local areas of the static heat dissipation mechanism. The rotation of fan blade 39 promotes uniform airflow in the space, which can promptly remove the heat accumulated around the static heat dissipation mechanism, prevent the formation of local hot spots, and make the temperature distribution of the battery system more uniform.

[0040] Please see the appendix Figure 4 Appendix Figure 6 Appendix Figure 7 and attached Figure 8 The static heat dissipation mechanism includes a thermally conductive rubber 40, the outer wall of which is fixedly connected to the inner wall of a rectangular frame 15, and a copper guide post 41 fixedly connected to the outer wall of the thermally conductive rubber 40. The outer wall of the copper guide post 41 is fixedly connected to the interior of the rectangular frame 15. The static heat dissipation mechanism also includes a fixing plate 42, the outer wall of which is fixedly connected to the outer wall of the thermally conductive rubber 40, and a circular hole 11 is provided on the outer wall of the fixing plate 42. The static heat dissipation mechanism also includes a heat sink 6, the outer wall of which is fixedly connected to the outer wall of the fixing plate 42.

[0041] Specifically, the circular holes 11 on the outer wall of the fixing plate 42 form airflow channels within the cavity between the rectangular frame 15, the battery pack 5, and the circuit board 7. The thermally conductive rubber 40 and the heat sink 6 have excellent thermal conductivity, quickly transferring the heat generated by the battery pack 5 and the relay 12 to the copper guide post 41, rapidly guiding the heat to the outside and accelerating heat dissipation, effectively reducing the internal temperature of the battery system. Simultaneously, the thermally conductive rubber 40 fills the tiny gaps between the battery pack 5 and the circuit board 7, ensuring a smooth heat transfer path and preventing increased thermal resistance due to air gaps. It also acts as a shock absorber, reducing damage to the battery system caused by vehicle vibrations and improving system stability and reliability. Timely heat dissipation ensures that components such as the battery pack 5 and the circuit board 7 operate within a suitable temperature range, reducing the impact of high temperatures on the battery pack 5's lifespan and decreasing the probability of overheating failures in components such as the circuit board 7.

[0042] 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 battery system for an airport tug comprising a housing (1), characterized in that, The inner wall of the shell (1) is fixedly connected with a support rod (2), the upper surface of the support rod (2) is fixedly connected with a support plate (3), the lower surface of the support plate (3) is fixedly connected with a hollow channel steel (4), the upper surface of the support plate (3) is fixedly connected with a battery pack (5), the upper surface of the battery pack (5) is provided with a circuit board one (7), the upper surface of the battery pack (5) is provided with a circuit board two (8), the upper surface of the circuit board one (7) is provided with a relay two (12), the upper surface of the circuit board two (8) is provided with a relay one (9), the outer wall of the relay two (12) is provided with a plug (10), the upper surface of the shell (1) is fixedly connected with a relay shell (13), the outer wall of the battery pack (5) is provided with a mounting plate (14), the battery pack (5) and the circuit board one (7) are provided with a rectangular frame one (15), the inner wall of the rectangular frame one (15) is provided with a dynamic heat dissipation mechanism, an auxiliary heat dissipation mechanism and a static heat dissipation mechanism, the dynamic heat dissipation mechanism comprises a motor (19), one end of the motor (19) is fixedly connected to the inner wall of the rectangular frame one (15), the output end of the motor (19) is fixedly connected with a rotating shaft (20), the outer wall of the rectangular frame one (15) is provided with a ventilation hole one (16), the outer wall of the rectangular frame one (15) is provided with a ventilation hole two (17), the outer wall of the rectangular frame one (15) is provided with a rectangular hole (18), the dynamic heat dissipation mechanism further comprises a disc (21), one end of the disc (21) is fixedly connected to the end of the rotating shaft (20) away from the motor (19), the end of the disc (21) away from the rotating shaft (20) is fixedly connected with a round pin (22), the outer wall of the round pin (22) is slidably connected with a rectangular frame two (23), the outer wall of the rectangular frame two (23) is fixedly connected with a long slide column (24), the other end of the long slide column (24) is fixedly connected with a rectangular block (25), the outer wall of the rectangular block (25) is slidably connected to the inner wall of the rectangular hole (18), the outer wall of the rectangular block (25) is fixedly connected with a rack one (27), the tooth end of the rack one (27) is meshingly connected with a gear two (28), the inside of the gear two (28) is fixedly connected with a rotating rod one (29), the outer wall of the rotating rod one (29) is rotatably connected in the inside of the rectangular frame one (15), one end of the rotating rod one (29) away from the gear two (28) is fixedly connected with a heat dissipation fan one (30).

2. The battery system for an airport tug of claim 1, wherein, The dynamic heat dissipation mechanism further comprises a rack two (31), the outer wall of the rack two (31) is fixedly connected to the outer wall of the rectangular block (25), the tooth end of the rack two (31) is meshingly connected with a gear three (32), the inside of the gear three (32) is fixedly connected with a rotating rod two (33), one end of the rotating rod two (33) away from the gear three (32) is fixedly connected with a heat dissipation fan two (34), the outer wall of the rotating rod two (33) is rotatably connected in the inside of the rectangular frame one (15).

3. The battery system for an airport tug of claim 1, wherein, The outer wall of the long slide column (24) is slidably connected with a U-shaped frame one (26), and the outer wall of the U-shaped frame one (26) is fixedly connected with the inner wall of the rectangular frame one (15).

4. The battery system for an airport tug of claim 1, wherein, The auxiliary heat dissipation mechanism comprises a U-shaped frame two (38), the outer wall of the U-shaped frame two (38) is fixedly connected with the inner wall of the rectangular frame one (15), the inside of the U-shaped frame two (38) is rotatably connected with a rotating rod three (37), and the outer wall of the rotating rod three (37) is fixedly connected with a fan blade (39).

5. The battery system for an airport tug of claim 4, wherein, The auxiliary heat dissipation mechanism further comprises a passive gear (36), the inner wall of the passive gear (36) is fixedly connected with the outer wall of the rotating rod three (37), the tooth end of the passive gear (36) is meshedly connected with a driving gear (35), and the inner wall of the driving gear (35) is fixedly connected with the outer wall of the rotating shaft (20).

6. The battery system for an airport tug of claim 1, wherein, The static heat dissipation mechanism comprises heat-conducting rubber (40), the outer wall of the heat-conducting rubber (40) is fixedly connected with the inner wall of the rectangular frame one (15), the outer wall of the heat-conducting rubber (40) is fixedly connected with a copper guide column (41), and the outer wall of the copper guide column (41) is fixedly connected with the inside of the rectangular frame one (15).

7. The battery system for an airport tug of claim 6, wherein, The static heat dissipation mechanism further comprises a fixed plate (42), the outer wall of the fixed plate (42) is fixedly connected with the outer wall of the heat-conducting rubber (40), and the outer wall of the fixed plate (42) is provided with a round hole (11).

8. The battery system for an airport tug of claim 7, wherein, The static heat dissipation mechanism further comprises a heat dissipation fin (6), and the outer wall of the heat dissipation fin (6) is fixedly connected with the outer wall of the fixed plate (42).

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