A sealing device for a two-stage sealing machine in lithium battery production

Abstract

This invention discloses a sealing device for a secondary sealing machine in lithium battery production. It includes a control cabinet with a rectangular opening at the top. One edge of the rectangular opening has a row of battery placement slots for placing lithium batteries. An ultrasonic welding device for sealing the lithium batteries is located between the battery placement slots and the edge of the rectangular opening. A rectangular frame is located inside the rectangular opening, with both ends connected to the edge of the opening via a guide mechanism. The rectangular frame is also connected to a telescopic mechanism, which moves the frame closer to or away from the battery placement slots. In use, clamping plates hold the openings of each aluminum film in slots. A negative pressure device then evacuates the suction chamber to a vacuum. A first cylinder drives a strip welding head above a strip welding seat to perform welding, sealing the vacuumed aluminum film. Finally, a third cylinder drives a blade to cut the aluminum film, separating excess aluminum film from the battery.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery secondary sealing machine technology, specifically a secondary sealing edge sealing device for lithium battery production. Background Technology

[0002] A lithium battery resealing machine is a piece of equipment used to reseal lithium batteries that have already undergone initial packaging. Its main function is to enhance the sealing and protection of the lithium battery, ensuring the stability and safety of the internal cells, and preventing electrolyte leakage or the entry of external impurities. In the lithium battery production process, the resealing operation is a crucial step in ensuring battery quality and safety. Through resealing, the internal structure of the cells can be effectively protected, preventing corrosion and damage from external substances and the environment. Furthermore, the resealing operation can control the internal pressure of the cells, preventing deformation or damage due to excessive internal pressure, while also preventing electrolyte leakage, ensuring the stable performance and safe use of the lithium battery.

[0003] Currently, when vacuuming aluminum foil, the foil needs to be placed flat on the sealing machine, ensuring it is directly below the pressure strip. When it's necessary to extract air from the foil to create a vacuum, the vacuum chamber is closed and appropriate pressure is applied. This method requires placing the opening of the foil on the sealing machine, necessitating proper alignment, which is inconvenient for mass battery production. Therefore, we propose a two-stage sealing device for lithium battery production. Utility Model Content

[0004] This invention provides a sealing device for a secondary sealing machine in lithium battery production, which has the advantage of clamping aluminum film and drawing a vacuum, thus solving the problems mentioned in the background art.

[0005] The technical solution of this utility model is implemented as follows: A sealing device for a double-sealing machine in lithium battery production includes a control cabinet. The top of the control cabinet has a rectangular opening, and one side edge of the rectangular opening has a row of battery placement slots for placing lithium batteries. An ultrasonic welding device for sealing lithium batteries is provided between the battery placement slots and the edge of the rectangular opening. A rectangular frame is provided inside the rectangular opening. The two ends of the rectangular frame are connected to the edge of the rectangular opening through a guide mechanism. The rectangular frame is also connected to a telescopic mechanism. Under the drive of the telescopic mechanism, the rectangular frame moves closer to or away from the battery placement slots. Two clamping plates are arranged parallel inside the rectangular frame. Each of the opposing surfaces of the two clamping plates has a vacuum chamber. Each vacuum chamber has a slot on the side near the battery placement slot. Linear drive devices connected to the clamping plates are provided on the upper and lower sides of the rectangular frame. Under the drive of the linear drive devices, the two clamping plates can be sealed together or opened. At least one clamping plate is connected to a negative pressure device to evacuate the vacuum chamber.

[0006] Preferably, the battery placement slots are set on the placement plate, which is detachably installed on the top of the control cabinet. The control cabinet below the placement plate is provided with an adsorption chamber. Each battery placement slot is provided with an adsorption hole communicating with the adsorption chamber. The bottom of the adsorption chamber is provided with a second pipe connector communicating with it. The second pipe connector is connected to a negative pressure device through a pipe.

[0007] Preferably, the clamping plate is provided with a first pipe joint that communicates with the interior of the air extraction chamber, and the first pipe joint is connected to the negative pressure device through a pipe.

[0008] Preferably, the linear drive device includes a second cylinder installed at the middle of the upper and lower ends of the rectangular frame, a second guide shaft provided parallel to the side of the second cylinder, the second guide shaft being movably disposed within the rectangular frame, and the free ends of the second cylinder and the second guide shaft being perpendicularly connected to the clamping plate.

[0009] Preferably, the telescopic mechanism includes a U-shaped connecting seat installed on the side of the rectangular frame away from the battery placement slot, the middle of the U-shaped connecting seat is connected to the fourth cylinder, the fourth cylinder is perpendicular to the plane of the rectangular frame, and the other end of the fourth cylinder is installed on the top of the control cabinet.

[0010] Preferably, the guide mechanism is set on the guide rails at both ends of the rectangular opening, the guide rails are parallel to the fourth cylinder, and the guide rails are connected to the rectangular frame by sliders respectively.

[0011] Preferably, the ultrasonic welding device includes a strip welding seat disposed at the edge of a rectangular opening, a strip welding head disposed above the strip welding seat, the strip welding head being installed at the bottom of an amplitude transformer, the top of the amplitude transformer being connected to a transducer, the transducer being connected to an ultrasonic generator, the amplitude transformer being mounted on a mounting base, a first cylinder and a first guide shaft being vertically disposed at the top of the mounting base, the first guide shaft being movably connected to a U-shaped frame, the first cylinder being mounted on the U-shaped frame, and the bottom ends of the U-shaped frame being connected to the top of a control cabinet.

[0012] Preferably, a shearing mechanism is provided on the side of the rectangular opening near the battery placement slot. The shearing mechanism includes a blade located inside the rectangular opening and tangentially disposed to the strip welding seat. The bottom of the blade is detachably mounted on a blade holder. A third cylinder and a third guide shaft are vertically disposed at the bottom of the blade holder. The third guide shaft is movably connected to the mounting bracket, and the third cylinder is fixed to the mounting bracket. The mounting bracket is disposed below the rectangular opening.

[0013] Preferably, a material discharge port is provided at the control cabinet below the rectangular opening, and a downward-sloping material discharge trough is provided inside the material discharge port.

[0014] Preferably, the clamping plate located above has an air blowing pipe on the side of the clamping plate near the battery placement slot. One end of the air blowing pipe is connected to the air blowing device through a conduit. The bottom of the air blowing pipe has multiple air blowing holes, and the airflow flowing out of the air blowing holes is vertically downward.

[0015] Compared with existing technologies, in use, after the lithium battery is placed in the battery placement slot, the opening of the aluminum film extends from the battery placement slot port into the rectangular opening. The fourth cylinder drives the rectangular frame to move towards the aluminum film, so that the opening of the aluminum film is positioned between two clamping plates. The two clamping plates move closer to each other, clamping the openings of each aluminum film in the slots. Then, the negative pressure device is controlled to create a vacuum in the suction chamber, thereby extracting the gas from the aluminum film and tightly wrapping the battery with the aluminum film. Then, the first cylinder drives the strip welding head to be placed above the strip welding seat for welding, thereby welding and sealing the vacuum-sealed aluminum film. Finally, the third cylinder drives the blade to cut the aluminum film, separating the excess aluminum film from the battery. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the front structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the rear structure of this utility model.

[0019] Figure 3 This is a schematic diagram of the structure of the present invention, in which two clamping plates clamp the battery sealing film.

[0020] Figure 4 This is a schematic diagram of the structure of the present invention after the battery sealing film is clamped and cut by two clamping plates.

[0021] Figure 5 This is a schematic diagram of the control cabinet of this utility model. Figure 1 .

[0022] Figure 6 This is a schematic diagram of the control cabinet of this utility model. Figure 2 .

[0023] Figure 7 This is a schematic diagram of the ultrasonic pen welding device of this utility model.

[0024] Figure 8 This is a schematic diagram of the rectangular frame structure of this utility model. Figure 1 .

[0025] Figure 9 This is a schematic diagram of the rectangular frame structure of this utility model. Figure 2 .

[0026] Figure 10 This is a schematic diagram of the structure of the placement plate of this utility model.

[0027] In the diagram: 1. Control cabinet; 2. Placement plate; 3. Battery placement slot; 4. Strip welding head; 5. Mounting base; 6. Transducer; 7. First cylinder; 8. First guide shaft; 9. U-shaped frame; 10. Support leg; 11. Material drop chute; 12. Second guide shaft; 13. Rectangular frame; 14. Rectangular opening; 15. Fourth cylinder; 16. Material drop port; 17. Clamping plate; 18. Amplifier rod; 19. Blade; 20. Third cylinder; 21. Mounting frame; 22. Strip welding base; 23. Second cylinder; 24. U-shaped connecting base; 25. Guide rail; 26. Tool holder; 27. Third guide shaft; 28. First pipe joint; 29. ​​Air extraction chamber; 30. Slot; 31. Adsorption chamber; 32. Adsorption hole; 33. Second pipe joint; 34. Air blowing pipe. Detailed Implementation

[0028] The technical solution of this utility model will be clearly and completely described below with reference to its embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] Reference Figures 1 to 10 This utility model provides a technical solution: a sealing device for a secondary sealing machine in lithium battery production, including a control cabinet 1. The top of the control cabinet 1 has a rectangular opening 14, and one side edge of the rectangular opening 14 has a row of battery placement slots 3 for placing lithium batteries. There are multiple battery placement slots 3, specifically, the battery placement slots 3 are placed on a placement plate 2. The placement plate 2 is detachably installed on the top of the control cabinet 1, and the placement plate 2 is fastened to the top of the control cabinet 1 with bolts. Below the placement plate 2, the control cabinet 1 has an adsorption cavity 31. The area of ​​the adsorption cavity 31 is smaller than the bottom area of ​​the placement plate 2, so that the placement plate 2 can completely seal the adsorption cavity 31. In order to fix the batteries in the battery placement slots 3, each battery placement slot 3 is provided with an adsorption hole 32 that communicates with the adsorption chamber 31. The bottom of the adsorption chamber 31 is provided with a second pipe connector 33 that communicates with it. The second pipe connector 33 is connected to a negative pressure device through a pipe. The negative pressure device is a negative pressure pump. The negative pressure pump extracts the air in the adsorption chamber 31, allowing the adsorption hole 32 to adsorb and fix each battery. In this way, the batteries can be fixed when placed in the battery placement slots 3.

[0030] The lithium battery is encased in an aluminum foil, such as Figure 3As indicated by arrow A, after the battery is placed in the battery placement slot 3, the opening of the aluminum film is positioned within the rectangular opening 14. At this point, the opening of the aluminum film needs to be sealed. An ultrasonic welding device for sealing the lithium battery is provided between the edge of the battery placement slot 3 and the rectangular opening 14. Figure 5 and Figure 6 As shown, the ultrasonic welding device includes a strip welding seat 22 disposed at the edge of the rectangular opening 14, as... Figure 3 and Figure 4 As shown, a strip welding head 4 is provided above the strip welding seat 22. The strip welding head 4 is installed at the bottom of the amplitude transformer 18. The top of the amplitude transformer 18 is connected to the transducer 6. The transducer 6 is connected to the ultrasonic generator. The amplitude transformer 18 is installed on the mounting base 5. The top of the mounting base 5 is vertically provided with a first cylinder 7 and a first guide shaft 8. There are at least two first guide shafts 8, which are symmetrically distributed on both sides of the first cylinder 7. The first guide shaft 8 is movably connected to the U-shaped frame 9. The first cylinder 7 is installed on the U-shaped frame 9. Specifically, the first guide shaft 8 is movably placed in the guide seat. Then the guide seat is installed on the U-shaped frame 9. The bottom two ends of the U-shaped frame 9 are connected to the top of the control cabinet 1. When the first cylinder 7 extends, it drives the strip welding head 4 to be placed on the top of the strip welding seat 22. The strip welding seat 22 and the strip welding head 4 clamp the aluminum film. At this time, the ultrasonic generator controls the transducer to work. The transducer drives the strip welding head 4 to vibrate ultrasonically through the amplitude transformer, thereby allowing the strip welding head 4 to seal the opening of the aluminum film.

[0031] Furthermore, it is important to emphasize that the battery encased in the aluminum foil needs to be evacuated. Therefore, the aluminum foil must be evacuated before ultrasonic welding; that is, in practical applications, the aluminum foil is evacuated before welding. Figure 3 and Figure 4 As shown, a rectangular frame 13 is provided inside the rectangular opening 14. The rectangular frame 13 is parallel to the strip welding seat 22. The two ends of the rectangular frame 13 are connected to the edge of the rectangular opening 14 through a guide mechanism. The guide mechanism is set on the guide rail 25 at the two ends of the rectangular opening 14. The guide rail 25 is parallel to the fourth cylinder 15, and the guide rail 25 is connected to the rectangular frame 13 through a slider. In this way, the rectangular frame 13 can be moved back and forth along the guide rail 25.

[0032] The rectangular frame 13 is also connected to a telescopic mechanism, which includes a U-shaped connecting seat 24 installed on the side of the rectangular frame 13 away from the battery placement slot 3. The middle part of the U-shaped connecting seat 24 is connected to the fourth cylinder 15. The fourth cylinder 15 is perpendicular to the plane where the rectangular frame 13 is located, and the other end of the fourth cylinder 15 is installed on the top of the control cabinet 1. The fourth cylinder 15 can drive the rectangular frame 13 to move, that is, under the drive of the telescopic mechanism, the rectangular frame 13 moves closer to or away from the battery placement slot 3.

[0033] like Figure 8 and Figure 9As shown, two clamping plates 17 are arranged parallel to each other inside the rectangular frame 13. Each clamping plate 17 has a suction chamber 29 on its opposite surface. Each suction chamber 29 has a slot 30 on the side near the battery placement slot 3. The slot 30 is also a strip structure, which can accommodate all the aluminum film. Linear drive devices connected to the clamping plates 17 are respectively provided on the upper and lower sides of the rectangular frame 13. The linear drive device includes a second cylinder 23 installed in the middle of the upper and lower ends of the rectangular frame 13. A second guide shaft 12 is arranged parallel to the side of the second cylinder 23. There are at least two second guide shafts 12, which are symmetrically arranged on both sides of the second cylinder 23. The second guide shafts 12 are movably arranged inside the rectangular frame 13, that is, the second guide shafts 12 pass through the rectangular frame 13. The free ends of the second cylinder 23 and the second guide shaft 12 are perpendicularly connected to the clamping plates 17, respectively. When the second cylinder 23 extends or retracts, it can drive the two clamping plates 17 to move. That is, under the drive of the linear drive device, the two clamping plates 17 can be sealed and closed or opened.

[0034] In order to create a vacuum within the extraction chamber 29, at least one clamping plate 17 is connected to a negative pressure device, which is used to evacuate the extraction chamber 29. Figure 8 As shown, specifically, a first pipe joint 28 is provided on the clamping plate 17, which communicates with the inside of the air extraction chamber 29. The first pipe joint 28 is connected to the negative pressure device through a pipe, and the negative pressure device is a negative pressure pump.

[0035] The specific work is as follows, such as Figure 3 As shown, after the lithium battery is placed in the battery placement slot 3 (e.g. Figure 3 (As indicated by arrow A) At this point, the opening of the aluminum film extends from the battery placement slot 3 into the rectangular opening 14. Then, the fourth cylinder 15 moves the rectangular frame 13 towards the aluminum film, positioning the opening between the two clamping plates 17. Once the rectangular frame 13 reaches the preset position, the clamping plates 17 clamp each opening of the aluminum film into the slots 30. Then, the negative pressure device is controlled to create a vacuum in the suction chamber 29, thereby extracting the gas from the aluminum film and tightly encasing the battery. Then, the first cylinder 7 moves the strip welding head 4 above the strip welding seat 22 to perform welding, thus sealing the vacuumed aluminum film.

[0036] Furthermore, the welded and sealed aluminum film needs to be cut to remove excess material. Therefore, a cutting mechanism is provided on the side of the rectangular opening 14 near the battery placement slot 3. This mechanism includes a blade 19 located within the rectangular opening 14 and tangentially to the strip welding seat 22. The bottom of the blade 19 is detachably mounted on a blade holder 26, specifically by bolts, facilitating blade disassembly and replacement. A third cylinder 20 and a third guide shaft 27 are vertically mounted at the bottom of the blade holder 26. There are at least two third guide shafts 27 symmetrically arranged on both sides of the third cylinder 20. The third guide shafts 27 are movably connected to the mounting bracket 21, while the third cylinder 20 is fixed to the mounting bracket 21. The mounting bracket 21 is located below the rectangular opening 14. Specifically, the third guide shafts 27 are movably mounted within a guide seat, which is then mounted on the mounting bracket 21. After the aluminum film welding and sealing is completed, as... Figure 4 As shown, the third cylinder 20 drives the blade 19 to rise and cut the aluminum film;

[0037] For example Figure 4 As shown, when the clamping plate 17 retracts due to the action of the fourth cylinder 15, the cut aluminum foil will remain at the edge of the clamping plate 17. In order to allow the aluminum foil to fall quickly, as... Figure 9 As shown, an air blowing pipe 34 is provided on the clamping plate 17 located above, and on the side of the clamping plate 17 near the battery placement slot 3. One end of the air blowing pipe 34 is connected to an air blowing device via a conduit. The air blowing device is an air pump. The bottom of the air blowing pipe 34 is provided with multiple air blowing holes, such as... Figure 4 The direction indicated by the middle arrow B is that the airflow from the air hole is vertically downward, which tells the airflow to cut the aluminum film and make it fall downward, thus accelerating the falling speed of the aluminum film.

[0038] It should be noted that when the blade 19 is cutting the aluminum film, the two clamping plates 17 still hold the aluminum film to prevent the blade 19 from shifting during cutting. In addition, the distance between the two clamping plates 17 should be large enough so that when the two clamping plates 17 are combined, they can clamp all the openings of the aluminum film.

[0039] like Figure 2 As shown, a material discharge port 16 is provided at the control cabinet 1 below the rectangular opening 14. The material discharge port 16 is provided with a downward inclined material discharge trough 11. The aluminum film will fall down along the material discharge trough 11 and gather. A material receiving container can be placed below the material discharge trough 11 to collect aluminum film fragments.

[0040] Based on the above implementation, further optimization is possible. The material discharge port 16 has hollowed out the top of the control cabinet 1. In order to make the top of the control cabinet 1 more stable, a support leg 10 is set at the edge of the material discharge port 16 to support the top of the control cabinet 1.

[0041] Based on the above implementation, further optimization is possible. Each edge of the clamping plate 17 is provided with a sealing strip, so that the two clamping plates can be better sealed when they are attached. Alternatively, a rubber pad can be provided on the surface of the slot 30 to clamp the aluminum film and prevent air leakage caused by gaps between the aluminum film and the slot 30.

[0042] Based on the above implementation, it should be further explained that the control cabinet 1 is equipped with a PLC control system and an air source system that provides power to each cylinder. The air source system is connected to the PLC control system. The PLC control system has been widely used in intelligent control production. Here, the PLC control system is the control center of the entire equipment. In actual use, the air source system is connected to the first cylinder 7, the second cylinder 23, the third cylinder 20, and the fourth cylinder 15 through conduits. The negative pressure device and the ultrasonic generator are also installed in the control cabinet 1.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sealing device for a double sealing machine for lithium battery production, comprising a control cabinet (1), wherein a rectangular opening (14) is arranged on the top of the control cabinet (1), characterized in that, A row of battery placement slots (3) for placing lithium batteries is provided on one side edge of the rectangular opening (14); An ultrasonic welding device for sealing lithium batteries is provided between the edge of the battery placement slot (3) and the rectangular opening (14); A rectangular frame (13) is provided inside the rectangular opening (14). The two ends of the rectangular frame (13) are connected to the edge of the rectangular opening (14) through a guide mechanism. The rectangular frame (13) is also connected to a telescopic mechanism. Under the drive of the telescopic mechanism, the rectangular frame (13) moves closer to or away from the battery placement slot (3). Two clamping plates (17) are arranged parallel to each other inside the rectangular frame (13). Each clamping plate (17) has a suction chamber (29) on its opposite surface. Each suction chamber (29) has a slot (30) on the side near the battery placement slot (3). Linear drive devices connected to the clamping plates (17) are provided on the upper and lower sides of the rectangular frame (13). These linear drive devices allow the two clamping plates (17) to seal or open under their influence. At least one clamping plate (17) is connected to a negative pressure device to evacuate the vacuum chamber (29).

2. The double sealing machine edge sealing device for lithium battery production according to claim 1, characterized in that, The battery placement slot (3) is set on the placement plate (2), the placement plate (2) is detachably installed on the top of the control cabinet (1), and the control cabinet (1) below the placement plate (2) is provided with an adsorption chamber (31). Each battery placement slot (3) is provided with an adsorption hole (32) that communicates with the adsorption chamber (31). The bottom of the adsorption chamber (31) is provided with a second pipe connector (33) that communicates with it. The second pipe connector (33) is connected to the negative pressure device through a pipe.

3. The sealing device for a secondary sealing machine in lithium battery production as described in claim 1, characterized in that, The clamping plate (17) is provided with a first pipe joint (28) that communicates with the inside of the air extraction chamber (29). The first pipe joint (28) is connected to the negative pressure device through a pipe.

4. The sealing device for a secondary sealing machine in lithium battery production as described in claim 2, characterized in that, The linear drive device includes a second cylinder (23) installed at the middle of the upper and lower ends of the rectangular frame (13). A second guide shaft (12) is provided parallel to the side of the second cylinder (23). The second guide shaft (12) is movably arranged inside the rectangular frame (13). The free ends of the second cylinder (23) and the second guide shaft (12) are perpendicularly connected to the clamping plate (17).

5. The sealing device for a secondary sealing machine in lithium battery production as described in claim 4, characterized in that, The telescopic mechanism includes a U-shaped connector (24) installed on the side of the rectangular frame (13) away from the battery placement slot (3). The middle part of the U-shaped connector (24) is connected to the fourth cylinder (15). The fourth cylinder (15) is perpendicular to the plane of the rectangular frame (13), and the other end of the fourth cylinder (15) is installed on the top of the control cabinet (1).

6. The sealing device for a secondary sealing machine in lithium battery production as described in claim 5, characterized in that, The guide mechanism is set at the guide rails (25) at both ends of the rectangular opening (14). The guide rails (25) are parallel to the fourth cylinder (15), and the guide rails (25) are connected to the rectangular frame (13) through sliders.

7. The sealing device for a secondary sealing machine in lithium battery production as described in claim 5, characterized in that, The ultrasonic welding device includes a strip welding seat (22) set at the edge of the rectangular opening (14), a strip welding head (4) above the strip welding seat (22), the strip welding head (4) is installed at the bottom of the amplitude transformer (18), the top of the amplitude transformer (18) is connected to the transducer (6), and the transducer (6) is connected to the ultrasonic generator. The amplitude rod (18) is installed on the mounting base (5). The top of the mounting base (5) is vertically provided with a first cylinder (7) and a first guide shaft (8). The first guide shaft (8) is movably connected to the U-shaped frame (9). The first cylinder (7) is installed on the U-shaped frame (9). The bottom two ends of the U-shaped frame (9) are connected to the top of the control cabinet (1).

8. The sealing device for a secondary sealing machine in lithium battery production as described in claim 7, characterized in that, A shearing mechanism is provided on the side of the rectangular opening (14) near the battery placement slot (3). The shearing mechanism includes a blade (19) located inside the rectangular opening (14) and tangential to the strip welding seat (22). The blade (19) is detachably mounted on the tool holder (26). The tool holder (26) has a third cylinder (20) and a third guide shaft (27) vertically mounted on its bottom. The third guide shaft (27) is movably connected to the mounting bracket (21). The third cylinder (20) is fixed to the mounting bracket (21). The mounting bracket (21) is located below the rectangular opening (14).

9. The sealing device for a secondary sealing machine in lithium battery production as described in claim 8, characterized in that, A material discharge port (16) is provided at the control cabinet (1) below the rectangular opening (14), and a downward-sloping material discharge trough (11) is provided inside the material discharge port (16).

10. The sealing device for a second sealing machine in lithium battery production as described in any one of claims 1-9, characterized in that, The clamping plate (17) located above is provided with an air blowing pipe (34) on the side of the clamping plate (17) near the battery placement slot (3). One end of the air blowing pipe (34) is connected to the air blowing device through a conduit. The bottom of the air blowing pipe (34) is provided with multiple air blowing holes, and the airflow from the air blowing holes flows vertically downward.

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