Winding equipment and winding method for lithium battery diaphragm production

Abstract

The invention discloses winding equipment and a winding method for lithium battery diaphragm production, and relates to the technical field of winding, the winding equipment comprises a base and a diaphragm drying mechanism, the diaphragm drying mechanism is provided with a winding mechanism and is rotatably provided with a glue roller, the base is slidably provided with a plurality of cutting blades and a displacement mechanism, and a cutting platform is fixedly arranged above the base; the cutting platform is arranged, a first rectangular block and a second rectangular block are arranged on the cutting platform in a sliding mode, and the first rectangular block and the second rectangular block move relatively through a first rack, a second rack and a gear; wherein the second rectangular block after rising can separate the cut waste strips from the trimmed battery diaphragm, the waste strips are blown into the rim charge collecting mechanism through an air outlet in the second rectangular block, and the waste strips are wound in combination with adsorption and rotation of the disc adsorption part.

Description

Technical Field

[0001] The present invention relates to the field of winding technology, and in particular to a winding device and a winding method for producing lithium battery separators. Background Art

[0002] Lithium-ion battery separators are key internal components in lithium-ion battery structures, and their performance has a crucial impact on the battery's characteristics. The separator's primary function is to separate the positive and negative electrodes of the battery, preventing contact and short circuits, while allowing electrolyte ions to pass through. Because the separator material is non-conductive, its physical and chemical properties largely determine the battery's performance.

[0003] The production process of lithium-ion battery separators primarily involves feeding, casting, shaping, slitting, and winding. During the slitting and winding stage, the semi-finished battery separator is typically cut to the appropriate size based on the customer's specific needs, and then wound through a winding machine.

[0004] However, during the slitting and winding process of lithium-ion battery separators, problems such as uneven coating, burrs or wrinkles are prone to occur at the edges of the battery separators. If such edge defects are not treated before winding and winding is carried out directly, it will directly affect the final performance of the separator. Summary of the Invention

[0005] The purpose of the present invention is to provide a winding device and a winding method for lithium battery separator production, so as to solve the problem that the battery separator is directly wound and the performance of the battery separator is easily affected by edge defects.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A winding device for producing lithium battery separators, comprising a base and a winding mechanism, wherein a plurality of cutting blades and a displacement mechanism are slidably provided on the base, a cutting platform is fixed above the base, and a scrap material collecting mechanism is provided below the cutting platform;

[0008] The winding mechanism includes a plurality of connecting plates with adjustable spacing, a sleeve shaft is rotatably provided on the connecting plates, the displacement mechanism includes an upper adsorption plate with adjustable height and spacing, and the edge material collecting mechanism includes a rotatably provided disc adsorption member;

[0009] The cutting platform comprises a platform plate, a lower adsorption plate is slidably provided on the platform plate, a first rectangular block and a second rectangular block are slidably provided on both sides of the platform plate, and a plurality of air outlets are provided on the second rectangular block.

[0010] Furthermore, a diaphragm drying mechanism is fixedly provided on the base, a first mounting bracket is also fixedly provided on the base, a first electric roller and a second electric roller are rotatably provided on the first mounting bracket, a back plate is also fixedly provided on the base, a first rotating roller, a second rotating roller, a third rotating roller and a fourth rotating roller are rotatably provided on the back plate, a pressure shaft is also slidably provided above the first rotating roller, and the pressure shaft is slidably installed on the back plate.

[0011] Furthermore, a chassis is fixedly provided on the back panel, a first telescopic cylinder is fixedly provided on the top of the chassis, a cutting mechanism is fixedly connected to the output end of the first telescopic cylinder, the cutting mechanism includes a plurality of cutting blades, and the plurality of cutting blades are connected to the cutting mechanism through an equidistant dispersion mechanism, a winding mechanism and a second mounting bracket are fixedly provided on the top of the diaphragm drying mechanism, a first mounting plate is fixedly provided on the side of the second mounting bracket, a glue box is fixedly provided on the top of the second mounting bracket, a slot is provided at the bottom end of the glue box, a rotating rod is rotatably provided on the first mounting plate, the rotating rod and the first mounting plate are driven by a first motor, the first motor is fixedly connected to the first mounting plate, a connecting shaft is rotatably provided on the first mounting plate, and glue rollers are equidistantly provided on the connecting shaft.

[0012] Furthermore, the winding mechanism includes a machine base, and a winding assembly rotates inside the machine base. The winding assembly includes several connecting plates, and the several connecting plates are connected by an equidistant dispersion mechanism. The equidistant dispersion mechanism can achieve equidistant dispersion of the several connecting plates. A second motor is fixedly provided on the outermost connecting plate, and a matching cylinder is rotatably provided on one side of the remaining connecting plates, and a sleeve shaft is rotatably provided on the other side of the connecting plate. A matching shaft is fixed at the center of the sleeve shaft, and a winding cylinder is sleeved on the outside of the sleeve shaft.

[0013] Furthermore, a first threaded rod is rotatably provided between the diaphragm drying mechanism and the back plate, a first limiting rod is fixedly provided, a third motor is connected to the first threaded rod, the third motor is fixedly connected to the back plate, the third motor drives the first threaded rod to rotate, and a second telescopic cylinder is threadedly fitted on the first threaded rod, the second telescopic cylinder is slidably connected to the first limiting rod, and the output end of the second telescopic cylinder is fixedly connected to a displacement mechanism.

[0014] Furthermore, a cutting platform is fixedly provided on the back plate, and the cutting platform includes a platform plate, a connecting block is fixedly provided on the side of the platform plate, the connecting block is fixedly connected to the back plate, and a limit stop bar is fixedly provided at the outermost part of both sides of the platform plate. A rectangular groove is also provided on both sides of the platform plate, and a first rectangular block and a second rectangular block are slidingly provided in the rectangular groove. The first rectangular block and the rectangular groove are connected by a first spring, and the second rectangular block and the rectangular groove are connected by a second spring. A first rack is fixedly provided at the bottom end of the first rectangular block, and a second rack is fixedly provided at the bottom end of the second rectangular block. A gear is also rotatably provided in the rectangular groove, and the gear is located between the first rack and the second rack, and is meshed with the first rack and the second rack at the same time. A number of air outlets are provided on the second rectangular block, and a cavity is provided inside the second rectangular block, which is connected to the fan.

[0015] Furthermore, the platform plate is provided with a plurality of rectangular through grooves between the two end rectangular grooves, each of which is slidably provided with a lower adsorption plate, each of which is provided with a plurality of first adsorption holes in an array, and the plurality of lower adsorption plates are connected by connecting rods.

[0016] Furthermore, the edge material collection mechanism includes a first rotating shaft, one end of the first rotating shaft is fixedly provided with a first pulley, the other end of the first rotating shaft is fixedly connected to a fourth motor, the bottom end of the platform plate is rotatably connected to a second rotating shaft, the middle part of the second rotating shaft is fixedly provided with a second pulley, the first pulley and the second pulley are connected by a synchronous belt, and the two ends of the second rotating shaft are respectively detachably connected to disc adsorption parts, and a number of second adsorption holes are provided on the disc adsorption parts at both ends, and circular baffles are also fixed on the disc adsorption parts at both ends.

[0017] A winding method for a winding device for producing lithium battery separators, comprising the following steps:

[0018] S1: First, the battery separator passes through the first electric roller and the second electric roller, and then is wound on the fourth rotating roller, the third rotating roller, the second rotating roller and the first rotating roller in sequence. The battery separator is adsorbed and fixed on the lower adsorption plate, and the lower adsorption plate drives the battery separator to move to the cutting position;

[0019] S2: Adjust the positions of the cutting blades and control the cutting blades to move downward. During the downward cutting process, the cutting blades on both sides exert a downward force on the first rectangular block, compressing the first spring. The second rectangular block moves upward to separate the cut waste strips from the trimmed battery separator. The air outlet blows the waste strips onto the disc adsorbents on both sides and adsorbs them through the second adsorption holes. The disc adsorbent rotates to reel and collect the waste strips.

[0020] S3: The third motor and the second telescopic cylinder cooperate with each other to realize the movement of the upper adsorption plate, which continues to adsorb and pull the slit battery diaphragm. The upper adsorption plate trims and moves the slit battery diaphragm to the winding mechanism for winding. Before winding, the glue roller is controlled to rotate upward to take glue, and rotate downward to apply glue to the winding drum. The upper adsorption plate drives the slit battery diaphragm to move above the winding drum, and moves the battery diaphragm downward to stick to the winding drum. The second motor controls several winding drums to rotate synchronously to wind the battery diaphragm.

[0021] Beneficial effects of the present invention:

[0022] 1. The present application is provided with a cutting platform, on which a first rectangular block and a second rectangular block are slidingly provided. The first rectangular block and the second rectangular block are moved relative to each other by a first rack, a second rack and a gear. The rising second rectangular block can separate the cut waste strips from the trimmed battery diaphragm, and blow the waste strips into the edge material collection mechanism through its upper air outlet. The waste strips are wound together with the adsorption and rotation of the disc adsorption part. At the same time, the setting of the first spring and the second spring in the cutting platform can better realize the resetting of the first rectangular block and the second rectangular block.

[0023] 2. The present application also realizes the adsorption of the battery diaphragm after slitting by providing a displacement mechanism, and moves the battery diaphragm to the winding drum, presses the battery diaphragm on the winding drum, and applies glue to the winding drum through a glue roller before pressing to avoid manual glue removal and application. The upper adsorption plate on the displacement mechanism can also cooperate with the lower adsorption plate on the cutting platform to adsorb, fix and pull the battery diaphragm before slitting, which has the advantages of simple structure and strong functionality. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention Figure I ;

[0026] Figure 2 This is a schematic diagram of the overall structure of the present invention Figure II ;

[0027] Figure 3 This is a schematic diagram of the winding mechanism structure of the present invention Figure I ;

[0028] Figure 4 This is a schematic diagram of the winding mechanism structure of the present invention Figure II ;

[0029] Figure 5 Schematic diagram of the displacement mechanism structure of the present invention;

[0030] Figure 6It is a structural schematic diagram of the edge material collecting mechanism of the present invention;

[0031] Figure 7 This is a schematic diagram of the cutting platform structure of the present invention Figure I ;

[0032] Figure 8 This is a schematic diagram of the cutting platform structure of the present invention Figure II ;

[0033] Figure 9 This is a front view of the cutting platform, edge material collecting mechanism and displacement mechanism of the present invention;

[0034] Figure 10 It is a schematic diagram of the structure of the upper adsorption plate of the present invention.

[0035] 1. Base; 2. Diaphragm drying mechanism; 3. First mounting bracket; 4. First electric roller; 5. Second electric roller; 6. Back plate; 7. First rotating roller; 8. Second rotating roller; 9. Third rotating roller; 10. Fourth rotating roller; 11. Battery diaphragm; 12. Chassis; 13. Presser; 14. First telescopic cylinder; 15. Cutting mechanism; 16. Cutting blade; 17. Second mounting bracket; 18. Glue tank; 19. Notch; 20. Winder 21. First mounting plate; 22. First motor; 23. Rotating rod; 24. Connecting shaft; 25. Glue roller; 26. First limiting rod; 27. First threaded rod; 28. Third motor; 29. Fourth motor; 30. Second telescopic cylinder; 31. Displacement mechanism; 32. Cutting platform; 33. Edge material collecting mechanism; 2001. Machine base; 2002. Connecting plate; 2003. Second motor; 2004. Matching cylinder; 2005. Winding cylinder ; 2006, sleeve shaft; 2007, matching shaft; 3101, L-shaped mounting rod; 3102, mounting groove; 3103, third telescopic cylinder; 3104, upper adsorption plate; 3201, platform plate; 3202, limit stop bar; 3203, rectangular groove; 3204, rectangular through groove; 3205, lower adsorption plate; 3206, first adsorption hole; 3207, first rectangular block; 3208, second rectangular block; 3209, connecting block; 321 0. First spring; 3211. Second spring; 3212. First rack; 3213. Second rack; 3214. Gear; 3215. Air outlet; 3216. Connecting rod; 3217. Second threaded rod; 3301. First rotating shaft; 3302. First pulley; 3303. Synchronous belt; 3304. Second rotating shaft; 3305. Second pulley; 3306. Disc adsorption part; 3307. Circular baffle; 3308. Second adsorption hole. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0037] Figure 1-9 As shown, a winding device for producing lithium battery separators is provided, such as Figure 1 As shown, it includes a base 1, on which a diaphragm drying mechanism 2 is fixedly provided, and the diaphragm drying mechanism 2 is used to dry the coated battery diaphragm 11. The diaphragm drying mechanism 2 is a technical means well known to those skilled in the art, and its specific structure includes drying equipment commonly found in this field. In this embodiment, no further details are given. A first mounting bracket 3 is also fixedly provided at the outlet of the diaphragm drying mechanism 2 on the base 1, and a first electric roller 4 and a second electric roller 5 are rotatably provided on the first mounting bracket 3. Both the first electric roller 4 and the second electric roller 5 can rotate. A back plate 6 is also fixedly provided on the base 1, and a first rotating roller 7, a second rotating roller 8, a third rotating roller 9 and a fourth rotating roller 10 are rotatably provided on the back plate 6, wherein the arrangement of the first rotating roller 7, the second rotating roller 8, the third rotating roller 9 and the fourth rotating roller 10 is not limited. In this embodiment, an arrangement method is provided. Specifically, in this embodiment, the diameter of the first rotating roller 7 is larger than that of the second rotating roller 8, the third rotating roller 9 and the fourth rotating roller 10, and is located at the upper end of the back plate 6, the second rotating roller 8 is located below the first rotating roller 7, the third rotating roller 9 and the fourth rotating roller 10 are arranged in parallel and are both located below the second rotating roller 8, and a pressing shaft 13 is also slidably provided above the first rotating roller 7, and the pressing shaft 13 is slidably installed on the back plate 6 so that the distance between the pressing shaft 13 and the first rotating roller 7 can be adjusted, and the battery diaphragm 11 passes through the outlet of the diaphragm drying mechanism 2, passes between the first electric roller 4 and the second electric roller 5, and then is wound around the fourth rotating roller 10, the third rotating roller 9, the second rotating roller 8 and the first rotating roller 7 in sequence, and finally passes through the top of the first rotating roller 7, and the pressing shaft 13 slides down to press the battery diaphragm 11 on the first rotating roller 7, waiting for the next processing.

[0038] like Figure 1As shown, a chassis 12 is also fixedly provided on the back panel 6, and a first telescopic cylinder 14 is fixedly provided on the top of the chassis 12. The output end of the first telescopic cylinder 14 is fixedly connected to a cutting mechanism 15. The cutting mechanism 15 includes a plurality of cutting blades 16. The plurality of cutting blades 16 are connected to the cutting mechanism 15 through an equidistant dispersion mechanism. The equidistant dispersion mechanism can achieve equidistant dispersion of the plurality of cutting blades 16. When not in use, the plurality of cutting blades 16 are gathered together. When in use, they are equidistantly dispersed according to demand. The equidistant dispersion mechanism includes but is not limited to a cylinder. Specifically, the plurality of cutting blades 16 are respectively connected to the cylinder, and the cylinder is fixed in the cutting mechanism 16, and its output end is connected to the cutting blade 16, and the cutting blade 16 can slide on the cutting mechanism 15. The movement of the cutting blade 16 is achieved by the cylinder, and the equidistant dispersion of the cutting blade 16 is further achieved. The equidistant dispersion mechanism mentioned in this embodiment can adopt the principle. The first telescopic cylinder 14 controls the cutting blade 16 to descend to the cutting position for cutting. The top of the diaphragm drying mechanism 2 is also fixed with a winding mechanism 20 and a second mounting bracket 17. The side of the second mounting bracket 17 is fixed with a first mounting plate 21. The top of the second mounting bracket 17 is fixed with a glue box 18. The bottom end of the glue box 18 is provided with a notch 19. Figure 2 As shown, a rotating rod 23 is rotatably provided on the first mounting plate 21, and the rotating rod 23 and the first mounting plate 21 are driven by a first motor 22. The first motor 22 is fixedly connected to the first mounting plate 21, and a connecting shaft 24 is rotatably provided on the first mounting plate 21. Glue rollers 25 are equidistantly provided on the connecting shaft 24. When in use, the first motor 22 drives the rotating rod 23 to rotate, and when the rotating rod 23 rotates upward, it will gradually move to the inside of the slot 19. A glue outlet area is provided on the glue box 18 at the slot 19. When the glue roller 25 enters the glue outlet area and gradually comes into contact with it, glue will stick to the surface of the glue roller 25.

[0039] Since the battery separator 11 has no adhesiveness during the winding process and cannot be wound directly, the actual operation process is usually to manually apply the adhesive on the winding drum 2005, and then press the winding end of the battery separator 11 on the winding drum 2005 to make the winding end adhere to the winding drum 2005, so as to facilitate subsequent winding. This process is usually achieved by manual application, which increases the workload of the staff and wastes time. Therefore, the present application adopts a mechanical form to achieve gluing and coating, which has the advantages of simple structure, easy operation and time saving.

[0040] like Figure 3 and Figure 4As shown, the winding mechanism 20 includes a base 2001, a winding assembly rotating inside the base 2001, and a plurality of connecting plates 2002 connected by an equidistant dispersion mechanism. The equidistant dispersion mechanism can achieve equidistant dispersion of the plurality of connecting plates 2002. A second motor 2003 is fixed on the outermost connecting plate 2002, and a matching cylinder 2004 is rotatably provided on one side of the remaining connecting plates 2002. A sleeve shaft 2006 is rotatably provided on the other side of the connecting plate 2002. 6 is fixed with a matching shaft 2007, and a winding drum 2005 is sleeved on the outer side of the sleeve shaft 2006. When the several connecting plates 2002 are gathered together, the matching shaft 2007 can be inserted into the matching drum 2004, so that the several sleeve shafts 2006 are connected to each other as a whole. At this time, driving the second motor 2003 can realize the synchronous rotation of the several sleeve shafts 2006, and the several winding drums 2005 sleeved on the sleeve shaft 2006 will also rotate synchronously. The several winding drums 2005 are independent of each other and can be taken out after winding is completed.

[0041] like Figure 1 As shown, a first threaded rod 27 is rotatably provided between the diaphragm drying mechanism 2 and the back plate 6, a first limiting rod 26 is fixedly provided, a third motor 28 is connected to the first threaded rod 27, the third motor 28 is fixedly connected to the back plate 6, and the third motor 28 drives the first threaded rod 27 to rotate. A second telescopic cylinder 30 is also threadedly fitted on the first threaded rod 27, the second telescopic cylinder 30 is slidably connected to the first limiting rod 26, and the output end of the second telescopic cylinder 30 is fixedly connected to a displacement mechanism 31, as shown in FIG. Figure 5 As shown, the displacement mechanism 31 includes an L-shaped mounting rod 3101, a mounting groove 3102 is opened in the L-shaped mounting rod 3101, a third telescopic cylinder 3103 is installed in the mounting groove 3102 through an equidistant dispersion mechanism, an upper adsorption plate 3104 is fixed to the output end of the third telescopic cylinder 3103, and the third telescopic cylinder 3103 is equidistantly dispersed through the equidistant dispersion mechanism.

[0042] During the winding process of the winding drum 2005, the upper adsorption plate 3104 returns to the cutting platform 32 and moves downward to press the cut battery separators 11 onto the cutting platform 32. This can prevent the battery separators 11 from being displaced during the cutting process. The surfaces of the upper adsorption plate 3104 and the lower adsorption plate 3205 are both smooth to avoid friction with the battery separators 11. The battery separators 11 may be offset during the downward pressing process of the upper adsorption plate 3104. In this embodiment, the structure of the upper adsorption plate 3104 is improved to avoid this phenomenon. Figure 10As shown, the upper adsorption plates 3104 themselves also include a horizontal plate and two side plates. The two side plates slide on both sides of the horizontal plate, and the two side plates are connected to the horizontal plate through a third spring. The battery diaphragm 11 after being cut will be limited in the position between the two side plates during the process of being pressed down by the upper adsorption plate 3104, effectively preventing it from displacement.

[0043] like Figure 1 As shown, a cutting platform 32 is fixed on the back plate 6, and a side material collecting mechanism 33 is provided below the cutting platform 32. Figure 7 and Figure 8 As shown, the cutting platform 32 includes a platform plate 3201, a connecting block 3209 is fixedly provided on the side of the platform plate 3201, and the connecting block 3209 is fixedly connected to the back plate 6. A limit stop bar 3202 is fixedly provided at the outermost part of both sides of the platform plate 3201. The height of the limit stop bar 3202 is slightly higher than the thickness of the battery diaphragm 11. A rectangular groove 3203 is also provided on both sides of the platform plate 3201. A first rectangular block 3207 and a second rectangular block 3208 are slidingly provided in the rectangular groove 3203. As shown in FIG7, the first rectangular block 3207 is connected to the rectangular groove 3203 by a first spring 3210, and the second rectangular block 3208 is connected to the rectangular groove 3203 by a second spring. The first rectangular block 3207 is connected with a spring 3211, and a first rack 3212 is fixedly provided at the bottom end of the second rectangular block 3208, and a second rack 3213 is fixedly provided at the bottom end of the second rectangular block 3208. A gear 3214 is also rotatably provided in the rectangular groove 3203, and the gear 3214 is located between the first rack 3212 and the second rack 3213, and is engaged with the first rack 3212 and the second rack 3213 at the same time. A plurality of air outlets 3215 are provided on the second rectangular block 3208, and a cavity is provided inside the second rectangular block 3208, and the cavity is connected to the fan. When the fan starts, the air is transported outward through the outlet 3215. The first spring 3210 and the second spring 3211 both play a resetting role.

[0044] like Figure 7 As shown, a plurality of rectangular through-grooves 3204 are provided on the platform plate 3201 between the rectangular grooves 3203 at both ends, and lower adsorption plates 3205 are slidably provided in the rectangular through-grooves 3204. A plurality of first adsorption holes 3206 are arranged in an array in the lower adsorption plates 3205 (the same first adsorption holes 3206 are provided on the upper adsorption plate 3104, which can perform negative pressure suction on the battery diaphragm 11). Figure 6 The several lower adsorption plates 3205 shown are connected by a connecting rod 3216, and a second threaded rod 3217 is rotatably provided under one of the lower adsorption plates 3205. The second threaded rod 3217 is rotatably installed at the bottom of the platform plate 3201. When the motor drives the second threaded rod 3217 to rotate, the several lower adsorption plates 3205 will move back and forth on the rectangular through-groove 3204.

[0045] like Figure 5 As shown, the edge material collecting mechanism 33 includes a first rotating shaft 3301, one end of the first rotating shaft 3301 is fixedly provided with a first pulley 3302, and the other end of the first rotating shaft 3301 is fixedly connected to the fourth motor 29 (as shown in FIG. Figure 9 As shown), the bottom end of the platform plate 3201 is rotatably connected to the second rotating shaft 3304, and the middle part of the second rotating shaft 3304 is fixedly provided with a second pulley 3305. The first pulley 3302 and the second pulley 3305 are connected by a synchronous belt 3303, and the two ends of the second rotating shaft 3304 are respectively detachably connected with a disc adsorption member 3306, wherein the detachable connection method includes threaded connection, clamping, etc., and a number of second adsorption holes 3308 are provided on the disc adsorption members 3306 at both ends, and a circular baffle 3307 is also fixed on the disc adsorption members 3306 at both ends. A negative pressure cavity can be formed inside the two disc adsorption members 3306, and adsorption is performed through the second adsorption holes 3308.

[0046] When in use, the cutting blade 16 is controlled to descend, and the cutting blades 16 at the two ends move to above the first rectangular blocks 3207 on both sides. As the cutting blade 16 descends, the cutting blade 16 will gradually contact the battery diaphragm 11, giving the first rectangular block 3207 a downward force and compressing the first spring 3210 downward. The descent of the first rectangular block 3207 will drive the first rack 3212 on it to move downward, further realizing the rotation of the gear 3214, and the gear 3214 is engaged with the second rack 3213 for transmission, thereby realizing the rise of the second rectangular block 3208. As the battery diaphragm 11 continues to move forward, the cutting blades on both sides 16 continues to trim the battery diaphragm 11, and the middle cutting blade 16 will cut the trimmed battery diaphragm 11. The cut battery diaphragm 11 enters the winding mechanism 20 for winding, and the trimmed battery diaphragm 11 waste will be separated from the trimmed battery diaphragm 11 by the second rectangular block 3208, and the trimmed waste strips will be blown onto the disc adsorption part 3306 through the air outlet 3215. The disc adsorption part 3306 adsorbs the waste strips, and then drives the disc adsorption part 3306 to rotate through the fourth motor 29, and finally realizes the winding of the waste strips to avoid the cut waste strips from scattering everywhere.

[0047] A winding method for a winding device for producing lithium battery separators, comprising the following steps:

[0048] S1: First, the battery diaphragm 11 is passed through the first electric roller 4 and the second electric roller 5, and then wound on the fourth rotating roller 10, the third rotating roller 9, the second rotating roller 8 and the first rotating roller 7 in sequence, and the lower adsorption plate 3205 is moved to the front end of the platform plate 3201, and the battery diaphragm 11 is adsorbed and fixed on the lower adsorption plate 3205. The lower adsorption plate 3205 drives the battery diaphragm 11 to move to the cutting position, and then the battery diaphragm 11 is pressed downward toward the first rotating roller 7 through the pressing shaft 13.

[0049] S2: Adjust the positions of several cutting blades 16 and control the cutting blades 16 to move downward. At this time, the cutting blades 16 on both sides are located above the first rectangular block 3207, and the rest are distributed at the cutting position. The cutting blades 16 on both sides will exert a downward force on the first rectangular block 3207 during the downward cutting process, and the first spring 3210 is compressed. At the same time, under the interaction of the first rack 3212, the second rack 3213 and the gear 3214, the second rectangular block 3208 moves upward to separate the cut waste strips from the trimmed battery diaphragm 11, and the air outlet 3215 blows the waste strips onto the disc adsorbents 3306 on both sides and adsorbs them through the second adsorption holes 3308. The disc adsorbent 3306 rotates to roll up and collect the waste strips. The disc adsorbents 3306 at both ends are also detachable to facilitate the removal of the waste strips.

[0050] S3: The third motor 28 and the second telescopic cylinder 30 cooperate with each other to realize the movement of the upper adsorption plate 3104. The upper adsorption plate 3104 continues to adsorb and pull the slit battery diaphragm 11, and the lower adsorption plate 3205 stops adsorption. The upper adsorption plate 3104 trims and moves the slit battery diaphragm 11 to the winding mechanism 20 for winding. Before winding, the glue roller 25 is controlled to rotate upward to take glue, and rotate downward to apply glue to the winding drum 2005. The upper adsorption plate 3104 drives the slit battery diaphragm 11 to move above the winding drum 2005, and moves the battery diaphragm 11 downward to be pasted on the winding drum 2005. The second motor 2003 controls several winding drums 2005 to rotate synchronously to wind the battery diaphragm 11. The upper adsorption plate 3104 returns to its original position and continues to cooperate with the lower adsorption plate 3205 to press the slit battery diaphragm 11 up and down to limit it. At this time, neither of them performs the adsorption function, but only plays a limiting role.

[0051] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, and a specific direction structure and operation, and therefore, cannot be understood as limiting the present invention. In addition, "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0052] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0053] The above is a detailed description of an embodiment of the present invention. However, the content described is only a preferred embodiment of the present invention and should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A winding device for producing lithium battery separators, characterized in that: The invention comprises a base (1) and a winding mechanism (20); a plurality of cutting blades (16) and a displacement mechanism (31) are slidably provided on the base (1); a cutting platform (32) is fixedly provided above the base (1); and a side material collecting mechanism (33) is provided below the cutting platform (32); The winding mechanism (20) includes a plurality of connecting plates (2002) with adjustable spacing, a sleeve shaft (2006) is rotatably provided on the connecting plates (2002), a displacement mechanism (31) includes an upper adsorption plate (3104) with adjustable height and spacing, and a side material collecting mechanism (33) includes a rotatably provided disc adsorption member (3306); The cutting platform (32) includes a platform plate (3201), a lower adsorption plate (3205) is slidably provided on the platform plate (3201), a first rectangular block (3207) and a second rectangular block (3208) are slidably provided on both sides of the platform plate (3201), and a plurality of air outlets (3215) are provided on the second rectangular block (3208).

2. A winding device for producing lithium battery separators according to claim 1, characterized in that: A diaphragm drying mechanism (2) is fixedly provided on the base (1); a first mounting bracket (3) is also fixedly provided on the base (1); a first electric roller (4) and a second electric roller (5) are rotatably provided on the first mounting bracket (3); a back plate (6) is also fixedly provided on the base (1); a first rotating roller (7), a second rotating roller (8), a third rotating roller (9) and a fourth rotating roller (10) are rotatably provided on the back plate (6); a pressing shaft (13) is also slidably provided above the first rotating roller (7); and the pressing shaft (13) is slidably installed on the back plate (6).

3. A winding device for producing lithium battery separators according to claim 2, characterized in that: The back plate (6) is also fixed with a chassis (12), the top of the chassis (12) is fixed with a first telescopic cylinder (14), the output end of the first telescopic cylinder (14) is fixedly connected with a cutting mechanism (15), the cutting mechanism (15) includes a plurality of cutting blades (16), and the plurality of cutting blades (16) are connected to the cutting mechanism (15) through an equidistant dispersion mechanism. The top of the diaphragm drying mechanism (2) is also fixed with a winding mechanism (20) and a second mounting bracket (17), and the side of the second mounting bracket (17) is fixed. A first mounting plate (21) is provided, a glue box (18) is fixedly provided on the top of the second mounting bracket (17), a notch (19) is provided at the bottom of the glue box (18), a rotating rod (23) is rotatably provided on the first mounting plate (21), the rotating rod (23) and the first mounting plate (21) are driven by a first motor (22), the first motor (22) is fixedly connected to the first mounting plate (21), a connecting shaft (24) is rotatably provided on the first mounting plate (21), and glue rollers (25) are equidistantly provided on the connecting shaft (24).

4. The winding device for producing lithium battery separator according to claim 3, characterized in that: The winding mechanism (20) comprises a machine base (2001), a winding assembly rotating inside the machine base (2001), and the winding assembly comprising a plurality of connecting plates (2002). The plurality of connecting plates (2002) are connected by an equidistant dispersion mechanism, and the equidistant dispersion of the plurality of connecting plates (2002) can be achieved by the equidistant dispersion mechanism. A second motor (2003) is fixedly provided on the outermost connecting plate (2002), a matching cylinder (2004) is rotatably provided on one side of the remaining connecting plates (2002), and a sleeve shaft (2006) is rotatably provided on the other side of the connecting plate (2002), a matching shaft (2007) is fixedly provided at the center of the sleeve shaft (2006), and a winding cylinder (2005) is sleeved on the outer side of the sleeve shaft (2006).

5. The winding device for producing lithium battery separator according to claim 4, characterized in that: A first threaded rod (27) is rotatably provided between the diaphragm drying mechanism (2) and the back plate (6), and a first limiting rod (26) is fixedly provided thereon. A third motor (28) is connected to the first threaded rod (27), and the third motor (28) is fixedly connected to the back plate (6). The third motor (28) drives the first threaded rod (27) to rotate. A second telescopic cylinder (30) is also threadedly engaged with the first threaded rod (27), and the second telescopic cylinder (30) is slidably connected to the first limiting rod (26). The output end of the second telescopic cylinder (30) is fixedly connected to a displacement mechanism (31).

6. The winding device for producing lithium battery separator according to claim 5, characterized in that: The displacement mechanism (31) comprises an L-shaped mounting rod (3101), a mounting groove (3102) is provided in the L-shaped mounting rod (3101), a third telescopic cylinder (3103) is installed in the mounting groove (3102) via an equidistant dispersion mechanism, and an upper adsorption plate (3104) is fixed to the output end of the third telescopic cylinder (3103).

7. The winding device for producing lithium battery separator according to claim 6, characterized in that: The back plate (6) is also fixedly provided with a cutting platform (32), and the cutting platform (32) includes a platform plate (3201), a connecting block (3209) is fixedly provided on the side of the platform plate (3201), and the connecting block (3209) is fixedly connected to the back plate (6), and a limit stop bar (3202) is fixedly provided at the outermost part of both sides of the platform plate (3201), and a rectangular groove (3203) is also provided on both sides of the platform plate (3201), and a first rectangular block (3207) and a second rectangular block (3208) are slidably provided in the rectangular groove (3203), and the first rectangular block (3207) and the rectangular groove (3203) are connected by a first spring (3210), and the second rectangular block (3208) is fixedly provided. 208) is connected to the rectangular groove (3203) through a second spring (3211), a first rack (3212) is fixedly provided at the bottom end of the first rectangular block (3207), a second rack (3213) is fixedly provided at the bottom end of the second rectangular block (3208), a gear (3214) is also rotatably provided in the rectangular groove (3203), the gear (3214) is located between the first rack (3212) and the second rack (3213), and is engaged with the first rack (3212) and the second rack (3213) at the same time, a plurality of air outlets (3215) are provided on the second rectangular block (3208), a cavity is provided inside the second rectangular block (3208), and the cavity is connected to the fan.

8. The winding device for producing lithium battery separator according to claim 7, characterized in that: The platform plate (3201) is provided with a plurality of rectangular through-grooves (3204) between the rectangular grooves (3203) at both ends, and lower adsorption plates (3205) are slidably arranged in the rectangular through-grooves (3204). The lower adsorption plates (3205) are provided with a plurality of first adsorption holes (3206) in an array, and the plurality of lower adsorption plates (3205) are connected by connecting rods (3216).

9. The winding device for producing lithium battery separator according to claim 8, characterized in that: The edge material collecting mechanism (33) comprises a first rotating shaft (3301), one end of the first rotating shaft (3301) is fixedly provided with a first pulley (3302), the other end of the first rotating shaft (3301) is fixedly connected to a fourth motor (29), the bottom end of the platform plate (3201) is rotatably connected to a second rotating shaft (3304), a second pulley (3305) is fixedly provided in the middle of the second rotating shaft (3304), the first pulley (3302) and the second pulley (3305) are connected by a synchronous belt (3303), and the two ends of the second rotating shaft (3304) are respectively detachably connected to a disc adsorption member (3306), a plurality of second adsorption holes (3308) are provided on the disc adsorption members (3306) at both ends, and a circular baffle (3307) is also fixedly provided on the disc adsorption members (3306) at both ends.

10. A winding method for a winding device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: First, the battery diaphragm is passed through the first electric roller (4) and the second electric roller (5), and then wound on the fourth rotating roller (10), the third rotating roller (9), the second rotating roller (8) and the first rotating roller (7) in sequence, and the battery diaphragm is adsorbed and fixed on the lower adsorption plate (3205), and the lower adsorption plate (3205) drives the battery diaphragm to move to the cutting position; S2: Adjust the positions of the plurality of cutting blades (16) and control the cutting blades (16) to move downward. During the downward cutting process, the cutting blades (16) on both sides exert a downward force on the first rectangular block (3207). The first spring (3210) is compressed, and the second rectangular block (3208) moves upward to separate the cut waste strips from the trimmed battery separator. The air outlet (3215) blows the waste strips onto the disc adsorbents (3306) on both sides and adsorbs them through the second adsorption holes (3308). The disc adsorbent (3306) rotates to roll up and collect the waste strips. S3: The third motor (28) and the second telescopic cylinder (30) cooperate with each other to realize the movement of the upper adsorption plate (3104), and the upper adsorption plate (3104) continues to adsorb and pull the slit battery diaphragm. The upper adsorption plate (3104) trims and moves the slit battery diaphragm to the winding mechanism (20) for winding. Before winding, the glue roller (25) is controlled to rotate upward to take glue, and rotate downward to apply glue to the winding drum (2005). The upper adsorption plate (3104) drives the slit battery diaphragm to move above the winding drum (2005), and moves the battery diaphragm downward to be attached to the winding drum (2005). The second motor (2003) controls the multiple winding drums (2005) to rotate synchronously to wind the battery diaphragm.

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