A lithium-ion battery pack with a heat dissipation function

Abstract

The present invention relates to the field of battery pack technology, and discloses a lithium-ion battery pack with a heat dissipation function, comprising a battery pack housing and a battery pack cover installed on the outside of a plurality of lithium battery packs, wherein the battery pack housing, the middle portion of the bottom surface, and the middle portion of the bottom surface of the battery pack cover are all fixedly connected to a temperature sensor, the inner wall of the battery pack housing is fixedly connected to a raised frame, a plurality of lithium battery packs are located inside the raised frame, and heat dissipation vents are provided through the side walls of both ends of the battery pack housing. When it is necessary to dissipate heat from the lithium battery packs inside the battery pack housing, this lithium-ion battery pack with a heat dissipation function only requires the heat inside the battery pack housing to be blown out of the heat dissipation vents to the external environment through the heat dissipation mechanism, which is convenient, fast, and easy to operate; the plurality of lithium battery packs can be suspended in the air, thereby facilitating air circulation inside the battery pack housing, which not only facilitates temperature monitoring by the temperature sensor, but also improves the heat dissipation effect.

Description

Technical Field

[0001] The present invention relates to the technical field of battery packs, in particular to a lithium-ion battery pack with a heat dissipation function. Background Art

[0002] A lithium-ion battery pack is a power system composed of one or more lithium-ion cells, typically along with circuitry to manage the battery's charge and discharge processes. Lithium-ion batteries are widely used in various portable electronic devices (such as mobile phones and laptops), electric vehicles, and aerospace applications due to their high energy density, long lifespan, and lightweight design.

[0003] The patent with the current announcement number CN222071989U discloses a lithium-ion battery and a battery pack, including a battery cell group, an insulating film for insulating and protecting the battery cell group is provided on the outside of the battery cell group, and a rubber plate and an aluminum shell are provided on the outside of the insulating film in sequence. The lithium-ion battery pack can improve the protective performance of the guard plate when it is hit and stabbed by sharp objects by the non-Newtonian fluid provided, and the impact can be cushioned by the rubber plate and the honeycomb layer provided. At the same time, when the sharp object is stabbed, the outer wall of the sharp object can be sealed, thereby reducing air flow and reducing the possibility of fire in the battery cell group. In this way, the protection performance of the battery cell group can be improved and the normal use of the lithium battery pack can be avoided from being affected.

[0004] However, the above-mentioned lithium-ion battery pack still has the following problems during actual use:

[0005] The ideal operating temperature range for lithium-ion batteries is typically between 20°C and 30°C. If the temperature rises above this range, the chemical reaction rate within the battery will significantly accelerate, which can not only lead to overheating, but also affect its charging and discharging efficiency and cause a temporary reduction in battery capacity. However, most current lithium-ion battery packs rely primarily on heat sinks for thermal management, lacking a more effective active heat dissipation mechanism, resulting in poor overall heat dissipation. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the present invention provides a lithium-ion battery pack with a heat dissipation function, which can monitor the temperature of the battery pack shell and the lithium battery packs inside the battery pack cover and dissipate heat in time.

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a lithium-ion battery pack with a heat dissipation function, comprising a battery pack shell and a battery pack cover installed on the outside of several lithium battery packs, the battery pack shell, the middle of the bottom surface and the middle of the bottom surface of the battery pack cover are fixedly connected to a temperature sensor, the inner wall of the battery pack shell is fixedly connected to a raised frame, several lithium battery packs are located inside the raised frame, the side walls at both ends of the battery pack shell are penetrated by heat dissipation ports, the inner walls at both ends of the battery pack shell are connected to support assemblies and heat dissipation mechanisms, the interiors of the two support assemblies are connected to lifting mechanisms, the interiors of the two lifting mechanisms are connected to sealing assemblies, the other end of the sealing assembly is connected to the heat dissipation mechanism, the lower end of the heat dissipation mechanism is connected to a dust collection assembly, and the heat dissipation mechanism is matched and aligned with the heat dissipation port.

[0008] Furthermore, the support assembly includes four support blocks, one end of each of the four support blocks is fixedly connected to one side of the inner wall of the battery pack housing, and the lifting mechanism is connected to the four support blocks.

[0009] Furthermore, the lifting mechanism includes a sliding rod, a screw rod and a lifting motor. The outer wall of the lifting motor is fixedly connected to the side wall of one of the support blocks. The output shaft of the lifting motor is fixedly connected to one end of the screw rod. The screw rod and the sliding rod are arranged in parallel. The outer walls at both ends of the screw rod are respectively rotatably connected to the inner walls of the two support blocks. The outer walls at both ends of the sliding rod are respectively fixedly connected to the inner parts of the other two support blocks. The two ends of the sealing assembly are respectively connected to the screw rod and the sliding rod.

[0010] Furthermore, the heat dissipation mechanism includes a support box, a cross bracket, a dustproof assembly and a blowing assembly. One side of the support box is fixedly connected to one side of the inner wall of the battery pack shell. A through opening is opened through the side wall of the support box, and the through opening is matched and aligned with the heat dissipation port. The four ends of the cross bracket are fixedly connected to the inner wall at one end of the through opening away from the heat dissipation port. The middle part of the cross bracket is connected to the blowing assembly, the dustproof assembly is connected to the support box, and the dustproof assembly is located between the cross bracket and the heat dissipation port. The sealing assembly is located on both sides of the dustproof assembly. The bottom surface of the support box is connected to the dust collecting assembly, and the sealing assembly and the dustproof assembly are matched and aligned with the dust collecting assembly.

[0011] Furthermore, the blowing assembly includes a heat dissipation motor and fan blades, the outer wall of the heat dissipation motor is fixedly connected to the side wall in the middle of the cross bracket, the output shaft of the heat dissipation motor is fixedly connected to the central axis of the fan blades, and the heat dissipation motor and fan blades are both located between the cross bracket and the dustproof assembly.

[0012] Furthermore, the dustproof component includes a support frame, a dustproof net and two plug-in blocks. A lifting port is provided through the upper surface of the support box near the heat dissipation port, and sockets are provided on both sides of the upper end of the lifting port. The inner wall of the support frame is fixedly connected to the outer wall of the dustproof net, and the two sides of the upper end of the support frame are respectively fixedly connected to the two plug-in blocks. The two plug-in blocks are respectively fastened to the two sockets by two No. 1 bolts. The outer walls on both sides of the support frame are respectively slidably connected to the inner walls on both sides of the lifting port. The support frame, the dustproof net and the two plug-in blocks are located between the heat dissipation port and the fan blades, and the sealing assembly is located on both sides of the support frame, the dustproof net and the two plug-in blocks.

[0013] Furthermore, the sealing assembly includes a lifting plate and two sealing plates, the two ends of the lifting plate are respectively sleeved on the outer walls of the screw rod and the sliding rod, the inner wall of the lifting plate is threadedly connected to the outer wall of the screw rod, the inner wall of the lifting plate is slidingly connected to the outer wall of the sliding rod, the bottom surface of the lifting plate is fixedly connected to the upper ends of the two sealing plates, the side walls of the two sealing plates are slidingly connected to the inner walls of the lifting port, the two sealing plates are respectively located on both sides of the support frame, the dustproof net and the two plug-in blocks, and a replacement port is opened through the upper surface of the lifting plate, and the replacement port is located directly above the support frame, the dustproof net and the two plug-in blocks.

[0014] Furthermore, cleaning brushes are fixedly connected to the lower ends of the two sealing plates, and the two cleaning brushes are slidably connected to both sides of the support frame and the dustproof net respectively.

[0015] Furthermore, the dust collection assembly includes a base box, a dust collection box and a handle. The upper surface of the base box is fixedly connected to the bottom surface of the support box. An ash outlet is provided through the upper surface of the base box. A wind shield is rotatably provided on the inner wall of the ash outlet. The outer walls of the rotating shafts at both ends of the wind shield are provided with torsion springs. The two ends of the two torsion springs are respectively fixedly connected to the outer wall of the wind shield and the inner wall of the ash outlet. The ash outlet is matched and aligned with the lifting port. The outer wall of the dust box is slidably connected to the inner wall of the base box. One end of the dust box located outside the base box is fixedly connected to the handle.

[0016] Furthermore, both sides of the dust box near the handle end are fixedly connected with blocks, and both sides of the bottom box near the handle end are provided with bayonet holes, and the two blocks are fastened to the two bayonet holes by two No. 2 bolts respectively.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This lithium-ion battery pack with heat dissipation function has heat dissipation vents at both ends of the battery pack shell, and two heat dissipation mechanisms matching the heat dissipation vents are set at both ends of the battery pack shell. When the lithium battery pack inside the battery pack shell needs to be cooled, the heat inside the battery pack shell only needs to be blown out from the heat dissipation vents to the external environment through the heat dissipation mechanisms. It is convenient, fast and easy to operate.

[0019] This lithium-ion battery pack with heat dissipation function can suspend several lithium battery packs by setting a raised frame inside the battery pack shell, thereby facilitating air circulation inside the battery pack shell, which not only facilitates temperature monitoring by the temperature sensor, but also improves the heat dissipation effect.

[0020] This lithium-ion battery pack with heat dissipation function can seal and block the heat dissipation port when the lithium-ion battery pack is in a low-temperature environment by providing a sealing component between the heat dissipation mechanism and the heat dissipation port, thereby increasing the temperature of the lithium battery pack inside the battery pack shell and preventing the external low temperature from entering the battery pack shell.

[0021] This lithium-ion battery pack with heat dissipation function can automatically raise and lower the sealing component according to the temperature monitored by the temperature sensor by setting a lifting mechanism between the battery pack shell and the sealing component, without the need for human control, making it more intelligent. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall appearance of the present invention;

[0023] Figure 2 is a schematic cross-sectional view of a battery pack housing and a battery pack cover of the present invention;

[0024] Figure 3 Schematic diagram of the explosion of the battery pack housing, lithium battery pack and battery pack cover of the present invention;

[0025] Figure 4 Detailed connection diagram of the dust collecting assembly, lifting mechanism and heat dissipation mechanism of the present invention;

[0026] Figure 5 For the present invention Figure 4 Schematic cross-section of each component;

[0027] Figure 6 For the present invention Figure 5 A schematic diagram of each component from another perspective;

[0028] Figure 7 For the present invention Figure 6 A magnified schematic diagram of point A in the middle;

[0029] Figure 8 Detailed connection diagram of the heat dissipation mechanism of the present invention;

[0030] Figure 9 For the present invention Figure 8 A magnified schematic diagram of point B in the middle;

[0031] Figure 10 Detailed connection diagram of the lifting mechanism and sealing assembly of the present invention;

[0032] Figure 11 Schematic diagram of the appearance of the windshield of the present invention.

[0033] In the figure: 1. Battery pack shell; 2. Battery pack cover; 3. Heat dissipation vent; 4. Support box; 5. Sealing plate; 6. Lithium battery pack; 7. Pad height; 8. Temperature sensor; 9. Bottom box; 10. Dust collection box; 11. Lifting plate; 12. Replacement port; 13. Slide rod; 14. Support block; 15. Screw rod; 16. Lifting motor; 17. Cross bracket; 18. Heat dissipation motor; 19. Fan blade; 20. Through port; 21. Block; 22. Handle; 23. Support frame; 24. Cleaning brush; 25. Dust outlet; 26. Lifting port; 27. Block; 28. Socket; 29. Dust net; 30. Plug; 31. Wind shield; 32. Torsion spring. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0035] See also Figures 1-10 A lithium-ion battery pack with a heat dissipation function includes a battery pack shell 1 and a battery pack cover 2 installed on the outside of several lithium battery packs 6. The middle part of the bottom surface of the battery pack shell 1 and the middle part of the bottom surface of the battery pack cover 2 are fixedly connected to a temperature sensor 8. The inner wall of the battery pack shell 1 is fixedly connected to a pad frame 7. Several lithium battery packs 6 are located inside the pad frame 7. Heat dissipation vents 3 are penetrated through the side walls at both ends of the battery pack shell 1. The inner walls at both ends of the battery pack shell 1 are connected to support assemblies and heat dissipation mechanisms. The interiors of the two support assemblies are connected to lifting mechanisms. The interiors of the two lifting mechanisms are connected to sealing assemblies. The other end of the sealing assembly is connected to the heat dissipation mechanism. The lower end of the heat dissipation mechanism is connected to a dust collection assembly. The heat dissipation mechanism is matched and aligned with the heat dissipation vents 3.

[0036] like Figures 1 to 10 As shown, the lithium-ion battery pack with heat dissipation function in the present invention can be used in the following steps:

[0037] Step 1: Install several lithium battery packs 6 on the raised frame 7 inside the battery pack housing 1. The raised frame 7 provides a height for the several lithium battery packs 6 to facilitate air circulation inside the battery pack housing 1 and the battery pack cover 2. Then, connect the several lithium battery packs 6 in series according to the wiring requirements. Finally, lock the battery pack cover 2 and the battery pack housing 1 with bolts, and then connect the last two exposed ends of the lithium battery pack 6 to the external equipment.

[0038] Step 2: During normal use of the lithium-ion battery pack, the two heat dissipation mechanisms located at both ends of the battery pack housing 1 will blow the heat generated by the lithium battery pack 6 to the outside of the battery pack housing 1 through the two heat dissipation ports 3, thereby achieving heat dissipation inside the battery pack housing 1.

[0039] Step 3: During the use of the lithium-ion battery pack, it may be in an area with a relatively cold environment. At this time, in order to prevent the low temperature from affecting the lithium battery pack 6 inside the battery pack housing 1, when the temperature sensor 8 detects that the internal temperature of the battery pack housing 1 is below the set temperature (for example, when it is just started and the lithium battery pack 6 has not yet generated a high temperature), the sealing assembly can be controlled to descend through the lifting mechanism, so that the communication port between the heat dissipation mechanism and the heat dissipation port 3 can be sealed, thereby preventing the external low temperature from entering the battery pack housing 1 and causing damage to the lithium battery pack 6.

[0040] Step 4: When the temperature sensor 8 detects that the internal temperature of the battery pack housing 1 reaches the set standard, the sealing assembly is raised by the lifting mechanism, so that the connection between the battery pack housing 1 and the external environment can be achieved again. At this time, because the lithium battery pack 6 is fully operational and generates heat, it can keep warm by itself and can also cooperate with the heat dissipation mechanism to cool down, thereby ensuring that the lithium battery pack 6 can always be at the standard temperature.

[0041] It should be noted that the lithium battery pack 6, battery pack housing 1 and battery pack cover 2 mentioned above are all mature technologies within existing lithium-ion battery packs, so they will not be described in detail here.

[0042] As a preferred solution of the present invention, the support assembly includes four support blocks 14 , one end of each of the four support blocks 14 is fixedly connected to one side of the inner wall of the battery pack housing 1 , and the lifting mechanism is connected to the four support blocks 14 .

[0043] More specifically, by providing the support block 14, support can be provided to the lifting mechanism, and at the same time, when the lifting mechanism controls the lifting and lowering of the sealing assembly, a lifting trajectory limit is provided to prevent tilting or deviation.

[0044] As a preferred solution of the present invention, the lifting mechanism includes a slide rod 13, a screw rod 15 and a lifting motor 16. The outer wall of the lifting motor 16 is fixedly connected to the side wall of one of the support blocks 14. The output shaft of the lifting motor 16 is fixedly connected to one end of the screw rod 15. The screw rod 15 and the slide rod 13 are arranged in parallel. The outer walls at both ends of the screw rod 15 are rotatably connected to the inner walls of the two support blocks 14 respectively. The outer walls at both ends of the slide rod 13 are fixedly connected to the inside of the other two support blocks 14 respectively. The two ends of the sealing assembly are respectively connected to the screw rod 15 and the slide rod 13.

[0045] More specifically, when it is necessary to control the lifting of the sealing assembly, it is only necessary to turn on the lifting motor 16. The output shaft of the lifting motor 16 will drive the screw rod 15 to rotate. Then the screw rod 15 will cooperate with the slide rod 13 to lift the sealing assembly connected between the screw rod 15 and the slide rod 13.

[0046] As a preferred solution of the present invention, the heat dissipation mechanism includes a support box 4, a cross bracket 17, a dustproof component and a blowing component. One side of the support box 4 is fixedly connected to one side of the inner wall of the battery pack shell 1. A through opening 20 is opened through the side wall of the support box 4, and the through opening 20 is matched and aligned with the heat dissipation port 3. The four ends of the cross bracket 17 are fixedly connected to the inner wall of the through opening 20 away from the heat dissipation port 3. The middle part of the cross bracket 17 is connected to the blowing component, the dustproof component is connected to the support box 4, and the dustproof component is located between the cross bracket 17 and the heat dissipation port 3. The sealing component is located on both sides of the dustproof component. The bottom surface of the support box 4 is connected to the dust collecting component, and the sealing component and the dustproof component are matched and aligned with the dust collecting component.

[0047] More specifically, when it is necessary to dissipate heat inside the battery pack housing 1, it is only necessary to turn on the blowing assembly. After the blowing assembly is started, the heat inside the battery pack housing 1 can be blown to the dustproof assembly through the opening 20 of the support box 4, and then discharged from the heat dissipation port 3 through the dustproof assembly to the external environment.

[0048] As a preferred solution of the present invention, the blowing assembly includes a heat dissipation motor 18 and a fan blade 19. The outer wall of the heat dissipation motor 18 is fixedly connected to the side wall in the middle of the cross bracket 17. The output shaft of the heat dissipation motor 18 is fixedly connected to the central axis of the fan blade 19. The heat dissipation motor 18 and the fan blade 19 are both located between the cross bracket 17 and the dustproof assembly.

[0049] More specifically, when it is necessary to dissipate heat inside the battery pack casing 1, the heat dissipation motor 18 is turned on. After the heat dissipation motor 18 is started, the output shaft can drive the fan blades 19 to rotate. When the fan blades 19 rotate, hot air can be extracted from the inside of the battery pack casing 1 and blown into the external environment.

[0050] As a preferred solution of the present invention, the dustproof component includes a support frame 23, a dustproof net 29 and two plug-in blocks 30. A lifting port 26 is provided on the upper surface of the support box 4 near the end of the heat dissipation port 3. Sockets 28 are provided on both sides of the upper end of the lifting port 26. The inner wall of the support frame 23 is fixedly connected to the outer wall of the dustproof net 29. The two sides of the upper end of the support frame 23 are respectively fixedly connected to the two plug-in blocks 30. The two plug-in blocks 30 are respectively fastened to the two sockets 28 by two No. 1 bolts. The outer walls on both sides of the support frame 23 are respectively slidably connected to the inner walls on both sides of the lifting port 26. The support frame 23, the dustproof net 29 and the two plug-in blocks 30 are located between the heat dissipation port 3 and the fan blades 19. The sealing component is located on both sides of the support frame 23, the dustproof net 29 and the two plug-in blocks 30.

[0051] More specifically, by providing a dustproof component, impurities such as dust or lint in the external environment can be prevented from entering the battery pack housing 1 through the heat dissipation port 3 without affecting the heat dissipation inside the battery pack housing 1.

[0052] In addition, after the dust screen 29 has been used for a period of time, a certain amount of dust or lint will adhere to its surface, or even the dust screen 29 itself will be damaged. At this time, the bolts between the two plug blocks 30 and the two sockets 28 can be loosened to pull the support frame 23, the dust screen 29 and the two plug blocks 30 out of the lifting port 26 together, so that the support frame 23, the dust screen 29 and the two plug blocks 30 can be repaired or replaced.

[0053] As a preferred solution of the present invention, the sealing assembly includes a lifting plate 11 and two sealing plates 5. The two ends of the lifting plate 11 are respectively sleeved on the outer walls of the screw rod 15 and the sliding rod 13. The inner wall of the lifting plate 11 is threadedly connected to the outer wall of the screw rod 15. The inner wall of the lifting plate 11 is slidingly connected to the outer wall of the sliding rod 13. The bottom surface of the lifting plate 11 is fixedly connected to the upper ends of the two sealing plates 5. The side walls of the two sealing plates 5 are slidingly connected to the inner walls of the lifting port 26. The two sealing plates 5 are respectively located on both sides of the support frame 23, the dustproof net 29 and the two plug-in blocks 30. A replacement port 12 is opened through the upper surface of the lifting plate 11. The replacement port 12 is located directly above the support frame 23, the dustproof net 29 and the two plug-in blocks 30.

[0054] More specifically, when the screw rod 15 rotates, the lifting plate 11 connected thereto will be lifted and lowered under the action of the screw rod 15 and the sliding rod 13, and then the two sealing plates 5 connected to the lifting plate 11 will also be lifted and lowered together, so that the connection between the through port 20 and the heat dissipation port 3 can be sealed or opened.

[0055] As a preferred solution of the present invention, the lower ends of the two sealing plates 5 are fixedly connected with cleaning brushes 24 , and the two cleaning brushes 24 are slidably connected to both sides of the support frame 23 and the dustproof net 29 respectively.

[0056] More specifically, during the period when the heat dissipation mechanism is dissipating heat inside the battery pack casing 1, some external dust or lint may adhere to the dustproof net 29 due to static electricity or other reasons, thereby reducing the heat dissipation effect inside the battery pack casing 1. At this time, while the screw rod 15 controls the lifting and lowering of the two sealing plates 5, the dust or other debris adhering to both sides of the surface of the dustproof net 29 can be cleaned, and the cleaned debris can be scraped into the dust collecting component for collection.

[0057] As a preferred solution of the present invention, the dust collection assembly includes a base box 9, a dust box 10 and a handle 22. The upper surface of the base box 9 is fixedly connected to the bottom surface of the support box 4. A dust outlet 25 is provided on the upper surface of the base box 9. A wind shield 31 is rotated on the inner wall of the ash outlet 25. The outer walls of the rotating shafts at both ends of the wind shield 31 are sleeved with torsion springs 32. The two ends of the two torsion springs 32 are respectively fixedly connected to the outer wall of the wind shield 31 and the inner wall of the ash outlet 25. The ash outlet 25 is matched and aligned with the lifting port 26. The outer wall of the dust box 10 is slidably connected to the inner wall of the base box 9. The end of the dust box 10 located outside the base box 9 is fixedly connected to the handle 22.

[0058] More specifically, when the two cleaning brushes 24 descend, they will first rest against the upper surface of the windshield 31 on the inner side of the ash drop port 25. Then, the cleaning brushes 24 continue to descend, pressing the windshield 31 into the dust box 10 through a rotating connection. As the windshield 31 is pushed away, the dust or other debris scraped off by the cleaning brushes 24 and adhering to the surface of the dustproof net 29 will fall from the ash drop port 25 into the dust box 10 for collection. Later, when the cleaning brushes 24 rise, the windshield 31 will rotate back into the ash drop port 25 again under the action of the internal torsion spring 32, thereby cutting off the connection between the dust box 10 and the lifting port 26.

[0059] As a preferred solution of the present invention, both sides of the dust box 10 near the handle 22 are fixedly connected with blocks 21, and both sides of the base box 9 near the handle 22 are provided with bayonet holes 27, and the two blocks 21 are fastened to the two bayonet holes 27 by two No. 2 bolts respectively.

[0060] More specifically, when the interior of the battery pack housing 1 is inspected after a period of use, the bolts between the block 21 and the bayonet 27 can be loosened, so that the dust box 10 can be pulled out from the bottom box 9 and the debris inside the dust box 10 can be cleaned, which is convenient and easy to operate.

[0061] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A lithium-ion battery pack with a heat dissipation function, comprising a battery pack housing (1) and a battery pack cover (2) mounted on the outside of a plurality of lithium battery packs (6), characterized in that: The battery pack housing (1), the middle of the bottom surface and the middle of the bottom surface of the battery pack cover (2) are all fixedly connected with a temperature sensor (8); the inner wall of the battery pack housing (1) is fixedly connected with a raised frame (7); a plurality of the lithium battery packs (6) are located inside the raised frame (7); the side walls at both ends of the battery pack housing (1) are penetrated with heat dissipation vents (3); the inner walls at both ends of the battery pack housing (1) are connected with a support assembly and a heat dissipation mechanism; the interiors of the two support assemblies are connected with a lifting mechanism; the interiors of the two lifting mechanisms are connected with a sealing assembly; the other end of the sealing assembly is connected to the heat dissipation mechanism; the lower end of the heat dissipation mechanism is connected with a dust collection assembly; the heat dissipation mechanism is matched and aligned with the heat dissipation vent (3); The heat dissipation mechanism comprises a support box (4), a cross bracket (17), a dustproof component and a blowing component, one side of the support box (4) is fixedly connected to one side of the inner wall of the battery pack housing (1), a through opening (20) is provided through the side wall of the support box (4), the through opening (20) is matched and aligned with the heat dissipation port (3), the four ends of the cross bracket (17) are fixedly connected to the inner wall of the through opening (20) away from the heat dissipation port (3), the middle part of the cross bracket (17) is connected to the blowing component, the dustproof component is connected to the support box (4), and the dustproof component is located between the cross bracket (17) and the heat dissipation port (3), the sealing component is located on both sides of the dustproof component, the bottom surface of the support box (4) is connected to the dust collecting component, and the sealing component and the dustproof component are matched and aligned with the dust collecting component; The dustproof assembly comprises a support frame (23), a dustproof net (29) and two insert blocks (30); a lifting opening (26) is provided through the upper surface of the support box (4) at one end close to the heat dissipation opening (3); The sealing assembly includes a lifting plate (11) and two sealing plates (5), the two ends of the lifting plate (11) are respectively sleeved on the outer walls of the screw rod (15) and the sliding rod (13), the inner wall of the lifting plate (11) is threadedly connected to the outer wall of the screw rod (15), the inner wall of the lifting plate (11) is slidably connected to the outer wall of the sliding rod (13), the bottom surface of the lifting plate (11) is fixedly connected to the upper ends of the two sealing plates (5), the side walls of the two sealing plates (5) are slidably connected to the inner wall of the lifting port (26), the two sealing plates (5) are respectively located on both sides of the support frame (23), the dustproof net (29) and the two plug-in blocks (30), and a replacement port (12) is opened through the upper surface of the lifting plate (11), and the replacement port (12) is located directly above the support frame (23), the dustproof net (29) and the two plug-in blocks (30).

2. The lithium-ion battery pack with heat dissipation function according to claim 1, characterized in that: The support assembly comprises four support blocks (14), one end of each of the four support blocks (14) is fixedly connected to one side of the inner wall of the battery pack housing (1), and the lifting mechanism is connected to the four support blocks (14).

3. The lithium-ion battery pack with heat dissipation function according to claim 2, characterized in that: The lifting mechanism includes a slide rod (13), a screw rod (15) and a lifting motor (16), the outer wall of the lifting motor (16) is fixedly connected to the side wall of one of the support blocks (14), the output shaft of the lifting motor (16) is fixedly connected to one end of the screw rod (15), the screw rod (15) and the slide rod (13) are arranged in parallel, the outer walls at both ends of the screw rod (15) are rotatably connected to the inner walls of the two support blocks (14), the outer walls at both ends of the slide rod (13) are fixedly connected to the inside of the other two support blocks (14), and the two ends of the sealing component are connected to the screw rod (15) and the slide rod (13) respectively.

4. The lithium-ion battery pack with heat dissipation function according to claim 3, characterized in that: The blowing assembly comprises a heat dissipation motor (18) and a fan blade (19), the outer wall of the heat dissipation motor (18) is fixedly connected to the side wall of the middle part of the cross bracket (17), the output shaft of the heat dissipation motor (18) is fixedly connected to the central axis of the fan blade (19), and the heat dissipation motor (18) and the fan blade (19) are both located between the cross bracket (17) and the dustproof assembly.

5. The lithium-ion battery pack with heat dissipation function according to claim 4, characterized in that: Sockets (28) are provided on both sides of the upper end of the lifting port (26), the inner wall of the support frame (23) is fixedly connected to the outer wall of the dustproof net (29), and the two sides of the upper end of the support frame (23) are fixedly connected to the two plug blocks (30), and the two plug blocks (30) are respectively fastened to the two sockets (28) by two No. 1 bolts, and the outer walls on both sides of the support frame (23) are respectively slidably connected to the inner walls on both sides of the lifting port (26), and the support frame (23), the dustproof net (29) and the two plug blocks (30) are located between the heat dissipation port (3) and the fan blade (19), and the sealing assembly is located on both sides of the support frame (23), the dustproof net (29) and the two plug blocks (30).

6. The lithium-ion battery pack with heat dissipation function according to claim 5, characterized in that: The lower ends of the two sealing plates (5) are fixedly connected to cleaning brushes (24), and the two cleaning brushes (24) are slidably connected to the two sides of the support frame (23) and the dustproof net (29), respectively.

7. The lithium-ion battery pack with heat dissipation function according to claim 6, characterized in that: The dust collecting assembly comprises a bottom box (9), a dust collecting box (10) and a handle (22); the upper surface of the bottom box (9) is fixedly connected to the bottom surface of the support box (4); an ash dropping opening (25) is provided through the upper surface of the bottom box (9); a windshield (31) is rotatably provided on the inner wall of the ash dropping opening (25); the outer walls of the rotating shafts at both ends of the windshield (31) are sleeved with torsion springs (32); the two ends of the two torsion springs (32) are respectively fixedly connected to the outer wall of the windshield (31) and the inner wall of the ash dropping opening (25); the ash dropping opening (25) is matched and aligned with the lifting opening (26); the outer wall of the dust collecting box (10) is slidably connected to the inner wall of the bottom box (9); and one end of the dust collecting box (10) located outside the bottom box (9) is fixedly connected to the handle (22).

8. The lithium-ion battery pack with heat dissipation function according to claim 7, characterized in that: Both sides of the dust collecting box (10) near the handle (22) are fixedly connected with clamping blocks (21), and both sides of the bottom box (9) near the handle (22) are provided with bayonet holes (27), and the two clamping blocks (21) are respectively fastened to the two bayonet holes (27) by two No. 2 bolts.

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