A lithium battery diaphragm coating machine electric heating wire cutting device

Abstract

This utility model belongs to the technical field of lithium battery separator production equipment, specifically relating to a heating wire cutting device for a lithium battery separator coating machine. The utility model includes: a guide roller; a winding assembly, which includes: a paper core tube suitable for winding the base film during rotation; a heating wire assembly, which includes: a heating wire disposed on one side between the guide roller and the paper core tube; a drive mechanism, which includes: a linear motor symmetrically disposed at both ends of the heating wire and a first cylinder connected to the linear motor; and a main control module electrically connected to the winding assembly, the heating wire assembly, the linear motor, and the first cylinder. This heating wire cutting device for a lithium battery separator coating machine drives the heating wire and the base film to move synchronously via a linear motor, significantly extending the effective contact time between the heating wire and the base film. This ensures stable and defect-free continuous cutting of the separator in high-speed coating lines above 250 m / min, solving a key technical bottleneck restricting high-speed production of lithium battery separators and significantly improving production efficiency.

Description

Technical Field

[0001] This utility model belongs to the technical field of lithium battery separator production equipment, specifically relating to a heating wire cutting device for a lithium battery separator coating machine. Background Technology

[0002] Lithium-ion battery separators are one of the core components of lithium-ion batteries, and their production efficiency and cutting quality directly determine the production capacity and performance of lithium-ion batteries. With the explosive growth in demand for lithium batteries from the new energy industry, lithium-ion battery separator production processes are rapidly developing towards higher speeds. Currently, in wet / dry separator production, the high-speed coating line speed has generally increased to over 250m / min. However, cutting technology, as a key link in separator production, has become a bottleneck restricting the improvement of production efficiency and product quality.

[0003] Currently, the industry mainly uses two technical solutions for cutting wet / dry membranes: One is the fixed heating wire cutting solution: by melting the diaphragm at a high temperature, this solution can meet the basic cutting requirements in low-speed production scenarios below 150m / min. However, when the production speed is increased to above 250m / min, the contact time between the heating wire and the base film is extremely short due to the high-speed movement of the base film, which cannot provide sufficient melting time. This can easily lead to defects such as incomplete cutting and fraying at the cut, directly resulting in cutting failure. The second solution is the serrated blade cutting method: using high-speed cutting action to complete the membrane cutting. Although it can be adapted to high-speed production to a certain extent, it is easy to generate membrane debris and burrs during the cutting process. If the debris is mixed into the subsequent production process, it will seriously affect the insulation performance of the lithium battery membrane and the safety of the battery. In addition, the blade wears out quickly and needs to be replaced frequently to ensure the cutting quality. This not only increases the equipment maintenance cost, but also interrupts the continuity of production.

[0004] Neither of the above two cutting techniques can simultaneously achieve stable, defect-free, and continuous cutting of the diaphragm under high-speed production conditions of 250 m / min or higher.

[0005] Therefore, in order to solve the above problems, it is necessary to design a heating wire cutting device for a lithium battery separator coating machine. Utility Model Content

[0006] The purpose of this invention is to provide a heating wire cutting device for a lithium battery separator coating machine to solve the technical problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, this utility model provides a heating wire cutting device for a lithium battery separator coating machine, comprising: Guide rollers are suitable for guiding and tensioning the base film; A winding assembly, comprising: a paper core tube adapted to wind up a base film upon rotation; A heating wire assembly, comprising: a heating wire disposed on one side between the guide roller and the paper core tube; The drive mechanism includes: a linear motor symmetrically arranged at both ends of the heating wire and a first cylinder connected to the linear motor; The main control module is electrically connected to the winding assembly, the heating wire assembly, the linear motor, and the first cylinder; among which... The main control module is adapted to control two linear motors to drive the heating wire to move in the direction of the base film; and The main control module is adapted to control the two first cylinders to drive the linear motor to move so that the heating wire passes through the base film for cutting.

[0008] Furthermore, the linear motor includes: a stator track and a mover slider slidably connected to the stator track; wherein The stator track is arranged parallel to the direction of movement of the base membrane; The heating wire assembly further includes: insulating ceramic clamps disposed at both ends of the heating wire and fixed slides connected to the insulating ceramic clamps; wherein The two fixed slide blocks are respectively connected to the moving slide block; and When the main control module controls the linear motor to move, the two moving sliders drive the fixed slide, the insulating ceramic clamp and the heating wire to move in the direction of the base film.

[0009] Furthermore, the drive mechanism further includes: a connecting plate connected to the stator track, a first slider connected to the connecting plate, a first guide rail connected to the first slider, and a first cylinder fixing plate connected to the first cylinder; wherein The telescopic end of the first cylinder is connected to the connecting plate; and The first cylinder is adapted to drive the connecting plate to move during extension and retraction. The connecting plate slides on the first guide rail via the first slider, and the connecting plate drives the stator rail to move.

[0010] Furthermore, the winding assembly also includes: a first servo motor connected to the paper core tube; wherein The first servo motor is electrically connected to the main control module; and The main control module is adapted to detect the linear velocity of the base film in real time according to the encoder in the first servo motor, and control the moving speed of the slider in the linear motor according to the linear velocity of the base film, so that the heating wire and the base film run synchronously.

[0011] Furthermore, the winding assembly further includes: an expansion shaft disposed inside both ends of the paper core tube, a first bearing seat connected to the expansion shaft bearing, and a second cylinder connected to either of the first bearing seats; wherein The first servo motor is connected to the expansion shaft; The first servo motor and the second cylinder are located on different sides; and The first servo motor is adapted to drive the expansion shaft to rotate, so as to drive another expansion shaft to rotate in the first bearing housing through the paper core tube, so as to rotate the paper core tube to wind up the base film.

[0012] Furthermore, the winding assembly also includes: a large gear connected to another expansion shaft, a second bearing housing connected to the first servo motor, a bearing housing fixing bracket disposed outside the second bearing housing, and a small gear connected to the output end of the first servo motor; wherein The output end of the first servo motor is connected to the bearing in the first bearing housing; The small gear meshes with the large gear.

[0013] Furthermore, a pressure roller assembly is provided on one side of the paper core tube; The pressure roller assembly includes: a rotating shaft, a rotating shaft support plate connected to bearings at both ends of the rotating shaft, open connecting arms sleeved at both ends of the rotating shaft, pressure roller connecting arms sleeved at both ends of the rotating shaft, pressure rollers connected to bearings of the two pressure roller connecting arms, and a third cylinder rotatably connected to the rotating shaft support plate; wherein The telescopic end of the third cylinder is rotatably connected to the open connecting arm; The third cylinder is electrically connected to the main control module; and The main control module is adapted to control the extension of the third cylinder while controlling the extension of the first cylinder; The third cylinder is adapted to drive the open connecting arm to rotate forward when it extends. The open connecting arm drives the rotating shaft to rotate, and the rotating shaft drives the pressure roller connecting arm to rotate forward, so that the pressure roller presses the base film wound on the paper core tube.

[0014] Furthermore, the pressure roller assembly also includes: at least one second slider disposed at the bottom of the rotating shaft support plate, a second guide rail slidably connected to the second slider, a guide rail support plate connected to the second guide rail, a lead screw support plate disposed on the outside of the rotating shaft support plate, a nut sleeve disposed on the outside of the rotating shaft support plate, a lead screw threadedly connected to the nut sleeve, a reducer mounting base connected to a bearing at one end of the lead screw, a reducer disposed on the reducer mounting base, and a second servo motor connected to the reducer; wherein The other end of the lead screw is connected to the bearing of the lead screw support plate. The output end of the reducer is connected to one end of the lead screw; The second servo motor is electrically connected to the main control module; and The main control module is adapted to control the start of the second servo motor. The second servo motor drives the lead screw to rotate through the reducer. The lead screw is threadedly connected to the nut so that the rotating shaft support plate slides on the second guide rail through the second slider.

[0015] The beneficial effects of this utility model are: (I) When the paper core tube is fully wound or needs to be cut, the cutting signal is manually input. When the main control module receives the cutting signal, it controls the first cylinder to extend, driving the linear motor connected to it to move along a preset direction until the heating wire of the heating wire assembly reaches the preset cutting position in contact with the base film. At the same time, the linear motor is synchronously controlled to drive the heating wire to move in the same direction as the base film, ensuring that there is no relative movement between the heating wire and the base film, providing sufficient time for the heating wire to melt the base film at high temperature, thus achieving precise cutting. By driving the heating wire and the base film to move synchronously through the linear motor, the effective contact time between the heating wire and the base film is greatly extended, ensuring stable and defect-free continuous cutting of the separator in high-speed coating lines above 250m / min. This solves the key technical bottleneck restricting the high-speed production of lithium battery separators and significantly improves production efficiency.

[0016] (II) When the paper core of the winding assembly is fully wound and needs to be replaced, the main control module sends a "cutting preparation" command to the drive mechanism. When the first cylinder extends to drive the heating wire to approach the base film, it simultaneously sends an extension command to the third cylinder. The telescopic end of the third cylinder extends outward and pushes the open connecting arm that is rotatably connected to it. Under the action of the thrust, the open connecting arm rotates forward around the axis of the rotating shaft. When the open connecting arm rotates, it drives the rotating shaft to rotate synchronously. The pressure roller connecting arms sleeved at both ends of the rotating shaft swing forward together with the rotating shaft. The pressure roller connecting arms drive the pressure roller to approach the surface of the paper core. Under the drive of the pressure roller connecting arms, the pressure roller finally comes into close contact with the surface of the base film wound on the paper core, firmly pressing the base film onto the surface of the paper core, thereby achieving the effect of preventing the base film from loosening after winding.

[0017] (III) When the diameter of the base film being wound by the paper core tube changes, the main control module controls the second servo motor to start. The second servo motor drives the lead screw to rotate through the reducer. The other end of the lead screw is connected to the lead screw support plate through a bearing. The lead screw support plate provides stable support for the lead screw, ensuring that there is no radial offset when it rotates. Since the lead screw and the nut sleeve fixed on the outside of the rotating shaft support plate are threadedly engaged, the rotational motion of the lead screw is converted into the linear motion of the nut sleeve through the thread engagement. The nut sleeve is rigidly fixed to the rotating shaft support plate, and its linear motion directly drives the rotating shaft support plate to move synchronously. At the same time, the second slider set at the bottom of the rotating shaft support plate slides on the second guide rail. The rotating shaft support plate drives the rotating shaft, the open connecting arm, the pressure roller connecting arm and the pressure roller on it to move synchronously along the width direction of the base film until they reach the target position preset by the main control module, thereby achieving the effect of adapting the pressure roller to different base film diameters.

[0018] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description and the accompanying drawings.

[0019] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 The three-dimensional representation of the preferred embodiment of this utility model. Figure 1 ; Figure 2 This is a perspective view of a preferred embodiment of the heating wire assembly and drive mechanism of this utility model; Figure 3 This is a perspective view of a preferred embodiment of the drive mechanism of this utility model; Figure 4 This is a perspective view of a preferred embodiment of the winding assembly of this utility model; Figure 5 The three-dimensional representation of the preferred embodiment of this utility model. Figure 2 ; Figure 6 This is a three-dimensional representation of a preferred embodiment of the pressure roller assembly of this utility model. Figure 1 ; Figure 7 yes Figure 6 Enlarged view of region A in the middle; Figure 8 This is a three-dimensional representation of a preferred embodiment of the pressure roller assembly of this utility model. Figure 2 .

[0022] In the picture: Guide roller 1; 2. Rewinding assembly, 201. Paper core tube, 202. First servo motor, 203. Expansion shaft, 204. First bearing seat, 205. Second cylinder, 206. Large gear, 207. Second bearing seat, 208. Bearing seat fixing frame, 209. Heating wire assembly 3, heating wire 301, insulating ceramic clamp 302, fixed slide 303; Drive mechanism 4, linear motor 401, stator rail 4011, mover slider 4012, first cylinder 402, connecting plate 403, first slider 404, first guide rail 405, first cylinder fixing plate 406; The components include: pressure roller assembly 5, rotating shaft 501, rotating shaft support plate 502, open connecting arm 503, pressure roller connecting arm 504, pressure roller 505, third cylinder 506, second slider 507, second guide rail 508, guide rail support plate 509, lead screw support plate 510, nut sleeve 511, lead screw 512, reducer fixing seat 513, reducer 514, and second servo motor 515. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, 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. Example 1

[0024] like Figures 1 to 8 As shown, this embodiment provides a heating wire cutting device for a lithium battery separator coating machine, comprising: A guide roller 1 is adapted to guide and tension the base film; a winding assembly 2 includes a paper core tube 201 adapted to wind the base film during rotation; a heating wire assembly 3 includes a heating wire 301 disposed on one side between the guide roller 1 and the paper core tube 201; a drive mechanism 4 includes a linear motor 401 symmetrically disposed at both ends of the heating wire 301 and a first cylinder 402 connected to the linear motor 401; and a main control module electrically connected to the winding assembly 2, the heating wire assembly 3, the linear motor 401, and the first cylinder 402; wherein the main control module is adapted to control the two linear motors... The machine 401 drives the heating wire 301 to move in the direction of the base film; and the main control module is adapted to control the two first cylinders 402 to drive the linear motor 401 to move so that the heating wire 301 passes through the base film for cutting; wherein the guide roller 1 is adapted to be fixed on the flipping frame (not shown in the figure) and connected to the bearing of the flipping frame; wherein the heating wire 301 can be energized by the main control module or independently, and is only energized before cutting to avoid the heating wire 301 being in an energized state for a long time, which would reduce its service life; wherein the main control module adopts, but is not limited to, PLC control.

[0025] In this embodiment, when the paper core tube 201 is fully wound or needs to be cut, a cutting signal is manually input. When the main control module receives the cutting signal, it controls the first cylinder 402 to extend, driving the linear motor 401 connected to it to move along a preset direction until the heating wire 301 of the heating wire assembly 3 reaches the preset cutting position in contact with the base film. At the same time, the linear motor 401 is synchronously controlled to drive the heating wire 301 to move in the direction of the base film, ensuring that there is no relative movement between the heating wire 301 and the base film, providing sufficient time for the heating wire 301 to melt the base film at high temperature, thus achieving precise cutting. By driving the heating wire 301 to move synchronously with the base film through the linear motor 401, the effective contact time between the heating wire 301 and the base film is greatly extended, ensuring stable and defect-free continuous cutting of the separator in high-speed coating lines above 250m / min. This solves the key technical bottleneck restricting the high-speed production of lithium battery separators and significantly improves production efficiency.

[0026] The linear motor 401 includes a stator track 4011 and a movable slider 4012 slidably connected to the stator track 4011; wherein the stator track 4011 is arranged parallel to the direction of motion of the base film; the heating wire assembly 3 further includes an insulating ceramic clamp 302 disposed at both ends of the heating wire 301 and a fixed slide block 303 connected to the insulating ceramic clamp 302; wherein the two fixed slide blocks 303 are respectively connected to the movable slider 4012; and when the main control module controls the linear motor 401 to move, the two movable sliders 4012 drive the fixed slide blocks 303, the insulating ceramic clamps 302 and the heating wire 301 to move in the direction of motion of the base film; wherein the stator track 4011 is arranged parallel to the direction of motion of the base film, thereby providing a precise motion track for the movable slider 4012, ensuring that the direction of motion of the heating wire 301 is aligned with the direction of motion of the base film. Complete consistency is ensured, preventing deviation in the cutting direction. Under the control of the main control module, the moving slider 4012 can quickly respond and adjust its speed (accelerating from a standstill to over 250m / min to match the speed of the base film), driving the heating wire 301 to maintain real-time synchronization with the base film, providing sufficient time for complete melting at high speed (traditional fixed heating wires have a contact time of less than 0.1 seconds due to lack of synchronous movement; this solution extends the contact time to 0.5-1 seconds through synchronous movement, ensuring complete melting). The heating wire 301 is fixed at both ends by setting an insulating ceramic clamp 302, thereby ensuring that the heating wire 301 has no displacement or slack during high-speed movement, ensuring the straightness of the cut. At the same time, the insulating properties of ceramics are used to block the current conduction between the heating wire 301 and the fixed slide 303 and the linear motor 401, preventing leakage damage to the drive components or affecting the electrical performance of the base film.

[0027] The driving mechanism 4 further includes: a connecting plate 403 connected to the stator rail 4011, a first slider 404 connected to the connecting plate 403, a first guide rail 405 connected to the first slider 404, and a first cylinder fixing plate 406 connected to the first cylinder 402; wherein the telescopic end of the first cylinder 402 is connected to the connecting plate 403; and the first cylinder 402 is adapted to drive the connecting plate 403 to move during telescopic movement, the connecting plate 403 slides on the first guide rail 405 through the first slider 404, and the connecting plate 403 drives the stator rail 4011 to move; wherein the first guide rail 405 and the first cylinder fixing plate 406 are fixed on the frame wall panel (not shown in the figure); wherein by setting the first guide rail 405 and the first slider 404, it is ensured that the linear motor 401 moves without jamming or offset, ensuring that the heating wire 301 can be accurately aligned with the cutting position, and avoiding misalignment of the cut due to radial offset.

[0028] The winding assembly 2 further includes: a first servo motor 202 connected to the paper core tube 201; wherein the first servo motor 202 is electrically connected to the main control module; and the main control module is adapted to detect the linear speed of the base film in real time according to the encoder in the first servo motor 202, and control the moving speed of the slider 4012 in the linear motor 401 according to the linear speed of the base film, so that the heating wire 301 runs synchronously with the base film; wherein by using the first servo motor 202, its built-in encoder can detect the linear speed of the base film in real time and transmit the speed signal to the main control module, providing core speed parameters for the synchronous movement of the heating wire 301, thereby achieving the effect of ensuring that the movement speed of the heating wire 301 and the base film is synchronized.

[0029] The winding assembly 2 further includes: an expansion shaft 203 disposed inside both ends of the paper core tube 201, a first bearing seat 204 connected to the expansion shaft 203 bearings, and a second cylinder 205 connected to either of the first bearing seats 204; wherein the first servo motor 202 is connected to the expansion shaft 203; the first servo motor 202 and the second cylinder 205 are disposed on different sides; and the first servo motor 202 is adapted to drive the expansion shaft 203 to rotate, so as to drive another expansion shaft 203 to rotate within the first bearing seat 204 through the paper core tube 201, so as to make the paper core... The core tube 201 rotates to rewind the base film. An expansion shaft 203 is provided, which expands to achieve a tight fit with the inner wall of the core tube 201, ensuring the stable installation of the core tube 201 and transmitting the torque of the first servo motor 202 to drive the core tube 201 to rotate. One end of the first bearing seat 204 is fixed to the frame wall plate (not shown in the figure), and the second cylinder 205 is fixed to the frame wall plate (not shown in the figure). When the second cylinder 205 extends or retracts, the distance between the two expansion shafts 203 changes, which facilitates the replacement of the core tube 201 and improves the roll changing efficiency.

[0030] The winding assembly 2 further includes: a large gear 206 connected to another expansion shaft 203, a second bearing seat 207 connected to the first servo motor 202, a bearing seat fixing frame 208 disposed outside the second bearing seat 207, and a small gear 209 connected to the output end of the first servo motor 202; wherein the output end of the first servo motor 202 is connected to the bearing of the first bearing seat 204; the small gear 209 meshes with the large gear 206; wherein the bearing seat fixing frame 208 is fixed to the frame wall plate (not shown in the figure); wherein by setting the small gear 209 and the large gear 206, a speed reduction transmission mechanism is formed, which converts the high speed of the first servo motor 202 into the winding speed required by the paper core tube 201, while increasing the torque, ensuring that the paper core tube 201 can still rotate stably under the action of the base film tension, and avoiding motor overload due to excessive load.

[0031] A pressure roller assembly 5 is provided on one side of the paper core tube 201; the pressure roller assembly 5 includes: a rotating shaft 501, a rotating shaft support plate 502 connected to the bearings at both ends of the rotating shaft 501, an open connecting arm 503 sleeved on both ends of the rotating shaft 501, a pressure roller connecting arm 504 sleeved on both ends of the rotating shaft 501, a pressure roller 505 connected to the bearings of the two pressure roller connecting arms 504, and a third cylinder 506 rotatably connected to the rotating shaft support plate 502; wherein the telescopic end of the third cylinder 506 is rotatably connected to the open connecting arm 503; the third cylinder 506 is electrically connected to the main control module; and the main control module is adapted to control the third cylinder 506 to extend when the first cylinder 402 extends; the third cylinder 506 is adapted to drive the open connecting arm 503 to rotate forward when extended, the open connecting arm 503 drives the rotating shaft 501 to rotate, the rotating shaft 501 drives the pressure roller connecting arm 504 to rotate forward, so that the pressure roller 505 presses the base film wound on the paper core tube 201.

[0032] In this embodiment, when the paper core tube 201 of the winding assembly 2 is fully wound and needs to be replaced, the main control module sends a "cutting preparation" command to the drive mechanism 4. When the first cylinder 402 extends to drive the heating wire 301 closer to the base film, it simultaneously sends an extension command to the third cylinder 506. The telescopic end of the third cylinder 506 extends outward and pushes the open connecting arm 503 rotatably connected to it. Under the action of the thrust, the open connecting arm 503 rotates forward around the axis of the rotating shaft 501. When the open connecting arm 503 rotates, it drives the rotating shaft 501 to rotate synchronously. The pressure roller connecting arms 504 sleeved at both ends of the rotating shaft 501 swing forward together with the rotating shaft 501. The pressure roller connecting arms 504 drive the pressure roller 505 to approach the surface of the paper core tube 201. Under the drive of the pressure roller connecting arms 504, the pressure roller 505 finally comes into close contact with the surface of the base film wound on the paper core tube 201, firmly pressing the base film onto the surface of the paper core tube 201, thereby achieving the effect of preventing the base film from loosening after winding.

[0033] The pressure roller assembly 5 further includes: at least one second slider 507 disposed at the bottom of the rotating shaft support plate 502; a second guide rail 508 slidably connected to the second slider 507; a guide rail support plate 509 connected to the second guide rail 508; a lead screw support plate 510 disposed on the outside of the rotating shaft support plate 502; a nut sleeve 511 disposed on the outside of the rotating shaft support plate 502; a lead screw 512 threadedly connected to the nut sleeve 511; a reducer mounting base 513 bearing-connected to one end of the lead screw 512; a reducer 514 disposed on the reducer mounting base 513; and a second servo motor connected to the reducer 514. 515; wherein the other end of the lead screw 512 is connected to the lead screw support plate 510 bearing; the output end of the reducer 514 is connected to one end of the lead screw 512; the second servo motor 515 is electrically connected to the main control module; and the main control module is adapted to control the start of the second servo motor 515, the second servo motor 515 drives the lead screw 512 to rotate through the reducer 514, the lead screw 512 is threadedly connected to the nut sleeve 511, so that the rotating shaft support plate 502 slides on the second guide rail 508 through the second slider 507; wherein the guide rail support plate 509 is fixed on the frame wall plate (not shown in the figure).

[0034] In this embodiment, when the diameter of the base film wound by the paper core tube 201 changes, the main control module controls the second servo motor 515 to start. The second servo motor 515 drives the lead screw 512 to rotate through the reducer 514. The other end of the lead screw 512 is connected to the lead screw support plate 510 through a bearing. The lead screw support plate 509 provides stable support for the lead screw 512, ensuring that there is no radial offset when it rotates. Since the lead screw 512 and the nut sleeve 511 fixed on the outside of the rotating shaft support plate 502 are threadedly engaged, the rotational motion of the lead screw 512 is converted into rotational motion through thread engagement. The linear motion of the nut sleeve 511, which is rigidly fixed to the rotating shaft support plate 502, directly drives the rotating shaft support plate 502 to move synchronously. At the same time, the second slider 507 at the bottom of the rotating shaft support plate 502 slides on the second guide rail 508. The rotating shaft support plate 502 drives the rotating shaft 501, the open connecting arm 503, the pressure roller connecting arm 504 and the pressure roller 505 on it to move synchronously along the width direction of the base film until they reach the target position preset by the main control module, thereby achieving the effect of adapting the pressure roller 505 to different base film diameters.

[0035] All the devices selected in this application (parts whose specific structures are not specified) are general standard parts or parts known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0036] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the shown or discussed mutual couplings, direct couplings, or communication connections may be through some communication interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms.

[0039] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0040] In addition, in the various embodiments of this utility model, each functional unit can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0041] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A lithium battery separator coating machine electric heating wire cutting device, characterized in that, include: Guide roller (1), suitable for guiding and tensioning the base film; The winding assembly (2) includes: a paper core tube (201) adapted to wind up the base film during rotation; The heating wire assembly (3) includes a heating wire (301) disposed on one side between the guide roller (1) and the paper core tube (201). The drive mechanism (4) includes: a linear motor (401) symmetrically arranged at both ends of the heating wire (301) and a first cylinder (402) connected to the linear motor (401). The main control module is electrically connected to the winding assembly (2), the heating wire assembly (3), the linear motor (401), and the first cylinder (402); wherein The main control module is adapted to control two linear motors (401) to drive the heating wire (301) to move in the direction of the base film; and The main control module is adapted to control the two first cylinders (402) to drive the linear motor (401) to move so that the heating wire (301) passes through the base film for cutting.

2. The heating wire cutting device for a lithium battery separator coating machine as described in claim 1, characterized in that, The linear motor (401) includes: a stator rail (4011) and a mover slider (4012) slidably connected to the stator rail (4011); wherein The stator track (4011) is arranged parallel to the direction of movement of the base membrane; The heating wire assembly (3) further includes: insulating ceramic clamps (302) disposed at both ends of the heating wire (301) and a fixed slide (303) connected to the insulating ceramic clamps (302); wherein The two fixed slide blocks (303) are respectively connected to the movable slide block (4012); and When the main control module controls the linear motor (401) to move, the two moving sliders (4012) drive the fixed slide (303), the insulating ceramic clamp (302) and the heating wire (301) to move in the direction of the base film.

3. The heating wire cutting device for a lithium battery separator coating machine as described in claim 2, characterized in that, The drive mechanism (4) further includes: a connecting plate (403) connected to the stator rail (4011), a first slider (404) connected to the connecting plate (403), a first guide rail (405) connected to the first slider (404), and a first cylinder fixing plate (406) connected to the first cylinder (402); wherein The telescopic end of the first cylinder (402) is connected to the connecting plate (403); and The first cylinder (402) is adapted to drive the connecting plate (403) to move during extension and retraction. The connecting plate (403) slides on the first guide rail (405) through the first slider (404). The connecting plate (403) drives the stator rail (4011) to move.

4. The heating wire cutting device for a lithium battery separator coating machine as described in claim 3, characterized in that, The winding assembly (2) further includes: a first servo motor (202) connected to the paper core tube (201); wherein The first servo motor (202) is electrically connected to the main control module; and The main control module is adapted to detect the linear velocity of the base film in real time according to the encoder in the first servo motor (202), and control the moving speed of the slider (4012) in the linear motor (401) according to the linear velocity of the base film, so that the heating wire (301) runs synchronously with the base film.

5. The heating wire cutting device for a lithium battery separator coating machine as described in claim 4, characterized in that, The winding assembly (2) further includes: an expansion shaft (203) disposed inside both ends of the paper core tube (201), a first bearing seat (204) connected to the expansion shaft (203) bearing, and a second cylinder (205) connected to any of the first bearing seats (204); wherein The first servo motor (202) is connected to the expansion shaft (203); The first servo motor (202) and the second cylinder (205) are located on different sides; and The first servo motor (202) is adapted to drive the expansion shaft (203) to rotate, so as to drive another expansion shaft (203) to rotate in the first bearing seat (204) through the paper core tube (201), so as to rotate the paper core tube (201) to wind up the base film.

6. The heating wire cutting device for a lithium battery separator coating machine as described in claim 5, characterized in that, The winding assembly (2) further includes: a large gear (206) connected to another expansion shaft (203), a second bearing housing (207) connected to the first servo motor (202), a bearing housing fixing bracket (208) disposed outside the second bearing housing (207), and a small gear (209) connected to the output end of the first servo motor (202); wherein The output end of the first servo motor (202) is connected to the bearing of the first bearing housing (204); The small gear (209) meshes with the large gear (206).

7. The heating wire cutting device for a lithium battery separator coating machine as described in claim 6, characterized in that, A pressure roller assembly (5) is provided on one side of the paper core tube (201). The pressure roller assembly (5) includes: a rotating shaft (501), a rotating shaft support plate (502) connected to bearings at both ends of the rotating shaft (501), open connecting arms (503) sleeved at both ends of the rotating shaft (501), pressure roller connecting arms (504) sleeved at both ends of the rotating shaft (501), pressure rollers (505) connected to bearings of the two pressure roller connecting arms (504), and a third cylinder (506) rotatably connected to the rotating shaft support plate (502); wherein The telescopic end of the third cylinder (506) is rotatably connected to the open connecting arm (503); The third cylinder (506) is electrically connected to the main control module; and The main control module is adapted to control the extension of the third cylinder (506) when the first cylinder (402) is extended; The third cylinder (506) is adapted to drive the open connecting arm (503) to rotate forward when extended. The open connecting arm (503) drives the rotating shaft (501) to rotate. The rotating shaft (501) drives the pressure roller connecting arm (504) to rotate forward so that the pressure roller (505) presses the base film wound on the paper core tube (201).

8. The heating wire cutting device for a lithium battery separator coating machine as described in claim 7, characterized in that, The pressure roller assembly (5) further includes: at least one second slider (507) disposed at the bottom of the rotating shaft support plate (502), a second guide rail (508) slidably connected to the second slider (507), a guide rail support plate (509) connected to the second guide rail (508), a lead screw support plate (510) disposed on the outside of the rotating shaft support plate (502), a nut sleeve (511) disposed on the outside of the rotating shaft support plate (502), a lead screw (512) threadedly connected to the nut sleeve (511), a reducer mounting base (513) bearing connected to one end of the lead screw (512), a reducer (514) disposed on the reducer mounting base (513), and a second servo motor (515) connected to the reducer (514); wherein The other end of the lead screw (512) is connected to the bearing of the lead screw support plate (510); The output end of the reducer (514) is connected to one end of the lead screw (512); The second servo motor (515) is electrically connected to the main control module; and The main control module is adapted to control the start of the second servo motor (515). The second servo motor (515) drives the lead screw (512) to rotate through the reducer (514). The lead screw (512) is threadedly connected to the nut sleeve (511) so that the rotating shaft support plate (502) slides on the second guide rail (508) through the second slider (507).

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