Lithium ion battery sealing device

Abstract

The invention discloses a lithium ion battery sealing device, and relates to the technical field of lithium battery sealing, the lithium ion battery sealing device comprises a lithium battery sealing device body, the lithium battery sealing device body comprises a lap joint bottom plate, and the back surface of the lap joint bottom plate is fixedly provided with a pushing flow guide mechanism; a downward-pressing polymerization sealing unit is arranged on the surface of the top of the lap joint bottom plate, limiting sliding units are fixedly connected to the edges of the two sides of the top of the lap joint bottom plate, and a butt joint sealing positioning unit is arranged at one end of each limiting sliding unit. A lithium battery is placed in a clamping groove, the position of the lithium battery is limited, a downward pressing top plate is descended in cooperation with a lifter, and a downward inclined groove in the outer side surface of a pushing closer is in butt joint in cooperation with a trapezoidal pushing block on the bottom surface of the downward pressing top plate, so that a rolling pushing strip in the pushing closer is rolled; and by utilizing the radian of the trapezoidal pushing block, the closer is pushed to extrude towards the middle, so that the closer is closed.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery sealing, and in particular to a lithium ion battery sealing device. Background Art

[0002] Lithium-ion batteries are secondary batteries (rechargeable batteries) that rely primarily on the movement of lithium ions between a positive and negative electrode. During the charge and discharge process, lithium ions are intercalated and deintercalated between the two electrodes. Since the advent of the electrification era, people's dependence on electricity has grown from a single light bulb to the use of electrical devices in every aspect of life. The popularity of mobile devices in the 21st century has led to an increasing demand for lithium batteries, forcing people to seek various means to improve lithium battery production efficiency to meet the supply and demand of the market economy.

[0003] For example, Chinese patent publication number: CN105140569B discloses an automatic lithium battery sealing machine, which includes a punch press, on which a punch head and a punch press connecting plate are correspondingly installed above and below the punch press, a battery conveyor belt to be sealed and a sealed battery conveyor belt are relatively rotatably installed on the punch press connecting plate, and an upper mold and a lower mold corresponding to and used in conjunction with each other are provided between the discharge end of the battery conveyor belt to be sealed and the feed end of the sealed battery conveyor belt, the upper mold is connected to the punch head, the lower mold is located on the inner side of the discharge end of the battery conveyor belt to be sealed, and a material push plate capable of moving back and forth across the battery conveyor belt to be sealed is provided on the outer side of the discharge end of the battery conveyor belt to be sealed.

[0004] The existing technology has the following problems: 1. The sealing process is an important part of lithium battery production. In traditional production methods, it is operated by manual feeding and stamping, which is relatively complicated and leads to low production efficiency. 2. Moreover, when traditional batteries are edge-sealed, they are all stamped with a punch. In order to maintain the efficiency of stamping, multiple lithium battery parts are usually stamped at a time. When lithium batteries are edge-sealed, the punches are fully automatic. If the speed of taking them is not fast enough, it is easy to cause employees to be pinched. Summary of the Invention

[0005] The present invention provides a lithium ion battery sealing device to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: A lithium-ion battery sealing device comprises a lithium-ion battery sealing device body, wherein the lithium-ion battery sealing device body comprises a lap bottom plate, and a pushing and guiding mechanism is fixedly mounted on the back side of the lap bottom plate.

[0007] A downward pressing polymerization sealing unit is provided on the top surface of the overlapping bottom plate. Limiting sliding units are fixedly connected to the edge positions on both sides of the top of the overlapping bottom plate, and a docking and closing positioning unit is provided at one end of the limiting sliding unit.

[0008] The pushing and guiding mechanism includes a transmission sliding unit, and an extrusion limiting unit is provided at one end of the transmission sliding unit.

[0009] A further improvement of the technical solution of the present invention lies in that: the downward pressing polymerization sealing unit includes a lifter fixedly installed on the outer surface of the top of the overlapping bottom plate, which is used to lower the downward pressing top plate in cooperation with the lifter. The output end of the lifter is fixedly connected to a downward pressing top plate. The trapezoidal pushing block on the bottom surface of the downward pressing top plate is used to dock with the lower inclined groove on the outer surface of the pushing and closing device. A processor is fixedly connected to the bottom surface of the downward pressing top plate. The heating and shaping sealing device is processed by the processor for adhesive edge sealing. Trapezoidal pushing blocks are fixedly connected to both side surfaces of the processor. By using the radian of the trapezoidal pushing block, the pushing and closing device is squeezed towards the middle to close it. A polymerization guiding processing head is fixedly installed on the bottom surface of the processor. A horn-shaped housing is fixedly connected to the bottom surface of the polymerization guiding processing head, which is used to concentrate the edge-sealing aluminum material and the outer protective plastic film on the surface of the lithium battery in cooperation with the horn-shaped housing.

[0010] A further improvement of the technical solution of the present invention lies in that: a guiding strip is fixedly connected to the inner top surface of the horn-shaped housing, which is used to guide the lithium battery, the edge-sealing aluminum material and the protective plastic film in cooperation with the guiding strip. An arc-shaped polymerization rolling plate is fixedly connected to the inner wall surface of the polymerization guiding processing head. The edge-sealing aluminum material and the protective plastic film are guided and slid by the radian on the surface of the arc-shaped polymerization rolling plate, and the protective plastic film is slid towards the middle. A heating and shaping sealing device that is movably sleeved on the inner surface of the polymerization guiding processing head is fixedly connected to the output end of the downward pressing top plate. The protective plastic film and the edge-sealing aluminum material are compacted by the heating and shaping sealing device.

[0011] A further improvement of the technical solution of the present invention lies in that: the limiting sliding unit includes limiting strips fixedly connected to the edge positions on both sides of the top of the overlapping bottom plate. A clamping and limiting plate is slidably lapped on the outer surface of the limiting strip. A pushing and closing device is fixedly connected to one end of the clamping and limiting plate. At the same time, the clamping and limiting plate on the outer surface of the pushing and closing device slides on the surface of the limiting strip to limit the position of the pushing and closing device. A clamping groove is provided on the top surface of the overlapping bottom plate and at the central position of the pushing and closing device. The lithium battery is placed inside the clamping groove to limit its position.

[0012] A further improvement of the technical solution of the present invention lies in that: a lower inclined groove is formed on the outer surface of the pushing closer, and a rolling pushing strip is fixedly connected to the inner surface of the lower inclined groove, so as to roll the rolling pushing strip inside it; fixed blocks are fixedly connected to the top edges on both sides of the overlapping bottom plate, and one end of each fixed block is provided with a pulling elastic wire fixedly connected to the outer surface of the pushing closer. After the trapezoidal pushing block disengages from the surface of the rolling pushing strip, the pulling elastic wire on the outer surface of the fixed block is used to pull back the pushing closer, and the pushing closer is pulled apart from the middle.

[0013] A further improvement of the technical solution of the present invention lies in that: the docking and closing positioning unit includes a semi-circular groove formed on the inner surface of the pushing closer, an arc-shaped clamping plate is fixedly connected to the inner surface of the semi-circular groove, and an elastic anti-slip strip is fixedly connected to the outer surface of the arc-shaped clamping plate, and the elastic anti-slip strip on the outer surface of the arc-shaped clamping plate is used to softly fit on the surface of the lithium battery.

[0014] A further improvement of the technical solution of the present invention lies in that: the transmission and sliding unit includes a sleeve fixedly installed on the outer surface of the overlapping bottom plate, a rotator is fixedly installed on the inner surface of the sleeve, a limiting plate is fixedly connected to the inner surface of the sleeve, and the position of the threaded rod is limited by the limiting plate. A threaded rod is threadedly sleeved on the outer surfaces of the sleeve and the limiting plate, so that the threaded rod slides on the inner surface of the threaded transmission gear, and thus the threaded rod moves towards one end. A threaded transmission gear is threadedly sleeved on the outer surface of the threaded rod.

[0015] A further improvement of the technical solution of the present invention lies in that: the extrusion and limiting unit includes an arc-shaped limiting sleeve movably sleeved on one end of the threaded rod, so that the swinging soft strip at one end of the arc-shaped limiting sleeve passes through the middle position of the pushing closer to wrap the lithium battery on the inner surface of the clamping groove. A swinging soft strip is fixedly connected to one side surface of the arc-shaped limiting sleeve, and rolling soft blocks are fixedly connected to the inner surfaces of the swinging soft strip and the arc-shaped limiting sleeve. The rolling soft blocks on the inner surface of the swinging soft strip are used to softly fit on the surface of the lithium battery to increase the friction force on its surface and increase the clamping force.

[0016] Due to the adoption of the above technical solution, the technical progress achieved by the present invention compared with the prior art is: 1. The present invention provides a lithium-ion battery sealing device. The lithium battery is placed inside the clamping groove to limit its position. The lifting device is used to lower the pressing top plate. The trapezoidal pushing block on the bottom surface of the pressing top plate is used to dock with the lower inclined groove on the outer surface of the pushing closer, so as to roll the rolling pushing bar inside it. By using the arc of the trapezoidal pushing block, the pushing closer is squeezed towards the middle and closed. The elastic anti-slip strip on the outer surface of the arc-shaped clamping plate is softly attached to the surface of the lithium battery. At the same time, the clamping limit plate on the outer surface of the pushing closer slides on the surface of the limit strip to limit the position of the pushing closer.

[0017] 2. The present invention provides a lithium-ion battery sealing device. At the same time, the polymerization diversion processing head is clamped to one end of the lithium battery. The horn-shaped sleeve is used to concentrate the edge-sealing aluminum material and the outer protective plastic film on the surface of the lithium battery. The diversion strip is used to divert the lithium battery, the edge-sealing aluminum material and the protective plastic film. Then, the arc of the arc-shaped polymerization rolling plate is used to guide the sliding of the edge-sealing aluminum material and the protective plastic film, and the protective plastic film is slid towards the middle. Then, the heat-setting sealer is used to compact the protective plastic film and the edge-sealing aluminum material, and the processing device is used to process the heat-setting sealer to bond and seal the edge.

[0018] 3. The present invention provides a lithium-ion battery sealing device. After the trapezoidal pushing block disengages from the surface of the rolling pushing bar, the pulling elastic wire on the outer surface of the fixed block is used to pull back the pushing closer, and the pushing closer is pulled open from the middle. The rotating device is used to drive the threaded transmission gear, so that the threaded rod slides on the inner surface of the threaded transmission gear, and thus the threaded rod moves towards one end. The position of the threaded rod is limited by the limit plate.

[0019] 4. The present invention provides a lithium-ion battery sealing device. The swinging soft strip at one end of the arc-shaped limit sleeve passes through the middle position of the pushing closer to wrap the lithium battery on the inner surface of the clamping groove. The rolling soft block on the inner surface of the swinging soft strip is softly attached to the surface of the lithium battery to increase the friction force on its surface and the clamping force. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a three-dimensional structural diagram of the pressing top plate of the present invention; Figure 3 is a partial sectional three-dimensional structural diagram of the pressing top plate of the present invention; Figure 4 is a partial sectional three-dimensional structural diagram of the polymerization diversion processing head of the present invention; Figure 5Schematic three-dimensional structure diagram of the overlapping bottom plate of the present invention; Figure 6 Schematic three-dimensional structure diagram of the pushing and guiding mechanism of the present invention; Figure 7 Schematic three-dimensional structure diagram of the side view of the pushing and guiding mechanism of the present invention.

[0021] In the figure: 1. Lithium battery sealing device body; 11. Overlapping bottom plate; 12. Lifter; 13. Pressing top plate; a1. Trapezoidal pushing block; a2. Processor; a3. Polymerization guiding and processing head; a4. Horn-shaped housing; a5. Guiding strip; a6. Arc-shaped polymerization rolling plate; a7. Heating and shaping sealer; 14. Limiting strip; 15. Clamping and limiting plate; 16. Pushing and closing device; 17. Arc-shaped clamping plate; 18. Elastic anti-slip strip; 19. Lower inclined groove; 110. Rolling and pushing strip; 111. Fixed block; 112. Pull-back elastic wire; 2. Pushing and guiding mechanism; 21. Housing; 22. Limiting plate; 23. Threaded rod; 24. Arc-shaped limiting housing; 25. Oscillating soft strip; 26. Rolling soft block; 27. Rotator; 28. Threaded transmission gear. Detailed implementation manners

[0022] The present invention will be further described in detail below with reference to the embodiments: Embodiment 1

[0023] As Figure 1-7 shown, the present invention provides a lithium-ion battery sealing device, including a lithium battery sealing device body 1. The lithium battery sealing device body 1 includes an overlapping bottom plate 11. A pushing and guiding mechanism 2 is fixedly installed on the back surface of the overlapping bottom plate 11. A pressing and polymerizing sealing unit is arranged on the top surface of the overlapping bottom plate 11. Limiting sliding units are fixedly connected to the top two side edge positions of the overlapping bottom plate 11. A docking and closing positioning unit is arranged at one end of the limiting sliding unit. The pressing and polymerizing sealing unit includes a lifter 12 fixedly installed on the outer surface of the top of the overlapping bottom plate 11. The pressing top plate 13 is lowered in cooperation with the lifter 12. The output end of the lifter 12 is fixedly connected to the pressing top plate 13. The lower inclined groove 19 on the outer surface of the pushing and closing device 16 is docked in cooperation with the trapezoidal pushing block a1 on the bottom surface of the pressing top plate 13. A processor a2 is fixedly connected to the bottom surface of the pressing top plate 13. The heating and shaping sealer a7 is processed through the processor a2 for adhesive edge sealing. Trapezoidal pushing blocks a1 are fixedly connected to the two side surfaces of the processor a2. Using the arcs of the trapezoidal pushing blocks a1 and a10, the pushing and closing device 16 is squeezed towards the middle to close it. A polymerization guiding and processing head a3 is fixedly installed on the bottom surface of the processor a2. At the same time, the polymerization guiding and processing head a3 is clamped to one end of the lithium battery in cooperation.

[0024] Furthermore. Example 2

[0025] As Figure 1-7 shown, on the basis of Example 1, the present invention provides a technical solution: Preferably, a horn sleeve a4 is fixedly connected to the bottom surface of the polymer guiding and processing head a3. The horn sleeve a4 is used to concentrate the edge-sealing aluminum material and the outer protective plastic film on the surface of the lithium battery. A guiding strip a5 is fixedly connected to the inner top surface of the horn sleeve a4. The guiding strip a5 is used to guide the flow of the lithium battery, the edge-sealing aluminum material, and the protective plastic film; an arc-shaped polymer rolling plate a6 is fixedly connected to the inner wall surface of the polymer guiding and processing head a3. The arc on the surface of the arc-shaped polymer rolling plate a6 is used to guide the sliding of the edge-sealing aluminum material and the protective plastic film, and slide the protective plastic film towards the middle. A heat-setting sealing device a7 that is movably sleeved on the inner surface of the polymer guiding and processing head a3 is fixedly connected to the output end of the pressing top plate 13. The limiting sliding unit includes limiting strips 14 fixedly connected to both side edges of the top of the overlapping bottom plate 11. A clamping and limiting plate 15 is slidably lapped on the outer surface of the limiting strip 14. A pushing and closing device 16 is fixedly connected to one end of the clamping and limiting plate 15. At the same time, the clamping and limiting plate 15 on the outer surface of the pushing and closing device 16 slides on the surface of the limiting strip 14 to limit the position of the pushing and closing device 16. A clamping groove is formed on the top surface of the overlapping bottom plate 11 and at the center position of the pushing and closing device 16. The lithium battery is placed inside the clamping groove to limit its position. An inclined groove 19 is formed on the outer surface of the pushing and closing device 16, and a rolling and pushing strip 110 is fixedly connected to the inner surface of the inclined groove 19, so as to roll the rolling and pushing strip 110 inside it. Example 3

[0026] As Figure 1-7 shown, on the basis of Examples 1-2, the present invention provides a technical solution: Preferably, fixing blocks 111 are fixedly connected to both side edges of the top of the overlapping bottom plate 11. A pulling elastic wire 112 fixedly connected to the outer surface of the pushing and closing device 16 is arranged at one end of the fixing block 111. After the trapezoidal pushing block a1 disengages from the surface of the rolling and pushing strip 110, the pulling elastic wire 112 on the outer surface of the fixing block 111 is used to pull back the pushing and closing device 16, and the pushing and closing device 16 is pulled open from the middle. The docking and closing positioning unit includes a semi-circular groove formed on the inner surface of the pushing and closing device 16, and an arc-shaped clamping plate 17 is fixedly connected to the inner surface of the semi-circular groove. After that, the heat-setting sealing device a7 compresses the protective plastic film and the edge-sealing aluminum material. An elastic anti-slip strip 18 is fixedly connected to the outer surface of the arc-shaped clamping plate 17, and the elastic anti-slip strip 18 on the outer surface of the arc-shaped clamping plate 17 is used to softly fit on the surface of the lithium battery. Example 4

[0027] As Figure 1-7 shown, on the basis of Embodiments 1-3, the present invention provides a technical solution: Preferably, the pushing and guiding mechanism 2 includes a transmission sliding unit, and an extrusion limiting unit is arranged at one end of the transmission sliding unit. The transmission sliding unit includes a sleeve 21 fixedly installed on the outer surface of the overlapping bottom plate 11. A rotator 27 is fixedly installed on the inner surface of the sleeve 21 to drive the threaded transmission gear 28 in cooperation with the rotator 27. A limiting plate 22 is fixedly connected to the inner surface of the sleeve 21 to limit the position of the threaded rod 23 in cooperation with the limiting plate 22. A threaded rod 23 is threadedly sleeved on the outer surfaces of the sleeve 21 and the limiting plate 22, so that the threaded rod 23 slides on the inner surface of the threaded transmission gear 28, thereby causing the threaded rod 23 to move towards one end. Embodiment 5

[0028] As Figure 1-7 shown, on the basis of Embodiments 1-4, the present invention provides a technical solution: Preferably, a threaded transmission gear 28 is threadedly sleeved on the outer surface of the threaded rod 23. The extrusion limiting unit includes an arc-shaped limiting sleeve 24 movably sleeved on one end of the threaded rod 23, so that a swinging soft strip 25 at one end of the arc-shaped limiting sleeve 24 passes through the middle position of the pushing and closing device 16 to wrap the lithium battery on the inner surface of the clamping groove. A swinging soft strip 25 is fixedly connected to one side surface of the arc-shaped limiting sleeve 24. A rolling soft block 26 is fixedly connected to the inner surfaces of the swinging soft strip 25 and the arc-shaped limiting sleeve 24. The rolling soft block 26 on the inner surface of the swinging soft strip 25 is in soft contact with the surface of the lithium battery to increase the frictional force on its surface and increase the clamping force.

[0029] Next, the working principle of the lithium-ion battery sealing device will be specifically described.

[0030] As Figure 1-7As shown, place the lithium battery inside the clamping groove to limit its position. Cooperate with the lifter 12 to lower the pressing top plate 13. Cooperate with the trapezoidal pushing block a1 on the bottom surface of the pressing top plate 13 to dock with the lower inclined groove 19 on the outer surface of the pushing closer 16, so as to roll the rolling pushing strip 110 inside it. Utilize the arc of the trapezoidal pushing blocks a1 and a10 to squeeze the pushing closer 16 towards the middle and close it. Cooperate with the elastic anti-slip strip 18 on the outer surface of the arc-shaped clamping plate 17 to softly fit on the surface of the lithium battery. At the same time, cooperate with the clamping limit plate 15 on the outer surface of the pushing closer 16 to slide on the surface of the limit strip 14 to limit the position of the pushing closer 16. At the same time, cooperate with the polymerization diversion processing head a3 to be clamped to one end of the lithium battery. Cooperate with the horn sleeve a4 to concentrate the edge-sealing aluminum material and the outer protective plastic film on the surface of the lithium battery. Cooperate with the diversion strip a5 to divert the lithium battery, the edge-sealing aluminum material and the protective plastic film. Then, through the arc on the surface of the arc-shaped polymerization rolling plate a6, guide and slide the edge-sealing aluminum material and the protective plastic film, slide the protective plastic film towards the middle. Then, use the heating and shaping sealer a7 to compact the protective plastic film and the edge-sealing aluminum material. Use the processor a2 to process the heating and shaping sealer a7 to bond and seal the edge. When the trapezoidal pushing block a1 detaches from the surface of the rolling pushing strip 110, cooperate with the pulling elastic wire 112 on the outer surface of the fixed block 111 to pull back the pushing closer 16 and pull the pushing closer 16 open from the middle. Cooperate with the rotator 27 to drive the threaded transmission gear 28, so that the threaded rod 23 slides on the inner surface of the threaded transmission gear 28, so that the threaded rod 23 moves towards one end. Cooperate with the limit plate 22 to limit the position of the threaded rod 23, so that the swinging soft strip 25 at one end of the arc-shaped limit sleeve 24 passes through the middle position of the pushing closer 16 and wraps the lithium battery on the inner surface of the clamping groove. Cooperate with the rolling soft block 26 on the inner surface of the swinging soft strip 25 to softly fit on the surface of the lithium battery to increase the friction force on its surface and increase the clamping force.

[0031] The above has generally described the present invention in detail. However, based on the present invention, some modifications or improvements can be made, which are obvious to those of ordinary skill in the technical field. Therefore, the modifications or improvements made without departing from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A lithium-ion battery sealing device, suitable for sealing lithium batteries, comprising a lithium-ion battery sealing device body (1), wherein the lithium-ion battery sealing device body (1) includes a lapping bottom plate (11), and is characterized in that: A pushing and guiding mechanism (2) is fixedly installed on the back surface of the overlapping bottom plate (11). A pressing and aggregating sealing unit is arranged on the top surface of the overlapping bottom plate (11). Limiting sliding units are fixedly connected to the positions of the two side edges at the top of the overlapping bottom plate (11). A docking and closing positioning unit is arranged at one end of the limiting sliding unit. The pushing and guiding mechanism (2) includes a transmission sliding unit, and an extrusion limiting unit is arranged at one end of the transmission sliding unit.

2. The lithium-ion battery sealing device according to claim 1, characterized in that: The pressing and aggregating sealing unit includes a lifter (12) fixedly installed on the outer surface of the top of the overlapping bottom plate (11). A pressing top plate (13) is fixedly connected to the output end of the lifter (12). A processor (a2) is fixedly connected to the bottom surface of the pressing top plate (13). Trapezoidal pushing blocks (a1) are fixedly connected to the two side surfaces of the processor (a2). A polymerization guiding processing head (a3) is fixedly installed on the bottom surface of the processor (a2). A horn-shaped housing (a4) is fixedly connected to the bottom surface of the polymerization guiding processing head (a3).

3. The sealing device for a lithium-ion battery according to claim 2, characterized in that: A guiding strip (a5) is fixedly connected to the inner top surface of the horn-shaped housing (a4). An arc-shaped polymerization rolling plate (a6) is fixedly connected to the inner wall surface of the polymerization guiding processing head (a3). A heating and shaping sealing device (a7) that is movably sleeved on the inner surface of the polymerization guiding processing head (a3) is fixedly connected to the output end of the pressing top plate (13).

4. A lithium-ion battery sealing device according to claim 1, characterized in that: The limiting sliding unit includes limiting strips (14) fixedly connected to the positions of the two side edges at the top of the overlapping bottom plate (11). A clamping and limiting plate (15) is slidably lapped on the outer surface of the limiting strip (14). A pushing and closing device (16) is fixedly connected to one end of the clamping and limiting plate (15). A clamping groove is formed in the top surface of the overlapping bottom plate (11) and at the central position of the pushing and closing device (16).

5. A lithium-ion battery sealing device according to claim 4, characterized in that: An inclined groove (19) is formed in the outer surface of the pushing and closing device (16). A rolling and pushing strip (110) is fixedly connected to the inner surface of the inclined groove (19). Fixing blocks (111) are fixedly connected to the positions of the two side edges at the top of the overlapping bottom plate (11). A pulling elastic wire (112) fixedly connected to the outer surface of the pushing and closing device (16) is arranged at one end of the fixing block (111).

6. The hermetic sealing device for a lithium-ion battery according to claim 4, characterized in that: The docking and closing positioning unit includes a semi-circular groove formed in the inner surface of the pushing and closing device (16). An arc-shaped clamping plate (17) is fixedly connected to the inner surface of the semi-circular groove. An elastic anti-slip strip (18) is fixedly connected to the outer surface of the arc-shaped clamping plate (17).

7. A lithium-ion battery sealing device according to claim 1, characterized in that: The transmission sliding unit includes a sleeve (21) fixedly installed on the outer surface of the overlapping bottom plate (11). A rotator (27) is fixedly installed on the inner surface of the sleeve (21). A limiting plate (22) is fixedly connected to the inner surface of the sleeve (21). A threaded rod (23) is threadedly sleeved on the outer surfaces of the sleeve (21) and the limiting plate (22). A threaded transmission gear (28) is threadedly sleeved on the outer surface of the threaded rod (23).

8. A lithium-ion battery sealing device according to claim 7, characterized in that: The extrusion limiting unit includes an arc-shaped limiting sleeve (24) movably sleeved on one end of the threaded rod (23). A swinging soft strip (25) is fixedly connected to one side surface of the arc-shaped limiting sleeve (24). A rolling soft block (26) is fixedly connected to the inner surfaces of the swinging soft strip (25) and the arc-shaped limiting sleeve (24).

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