A transmission device for lithium battery diaphragm and working method thereof

Abstract

The present invention is applicable to the technical field of transmission equipment for lithium battery diaphragms, and provides a transmission equipment for lithium battery diaphragms and a working method thereof, including a transmission roller assembly, two groups of ion blowers are symmetrically arranged on one side of the transmission roller assembly, flattening assemblies are arranged at the bottom of the two groups of ion blowers, slitting assemblies are arranged at the bottom of the flattening assemblies, a winding drive assembly is arranged on one side of the slitting assembly, two groups of roll-changing swing rods are arranged on the side of the winding drive assembly away from the slitting assembly, and a lithium battery diaphragm winding roller assembly is arranged on the top of the roll-changing swing rod; wherein the two groups of flattening assemblies are symmetrically arranged; the transmission roller assembly includes a first transmission roller, and a slitting auxiliary roller is arranged at the bottom of the first transmission roller. The device solves the problems of uneven diaphragm winding in the middle, uneven slitting and trimming caused by vibration, and winding deviation caused by paper tube deformation, and achieves the effects of reducing vibration, improving the quality of slitting and trimming, improving winding quality, and reducing costs.

Description

Technical Field

[0001] The present invention relates to the technical field of transmission equipment for lithium battery diaphragms, and more specifically, to a transmission equipment for lithium battery diaphragms and a working method thereof. Background Art

[0002] The transmission equipment of lithium battery diaphragm (lithium battery diaphragm winding equipment) plays an important role in the production process of lithium batteries. The traditional winding will trim or slit both sides, and the cut diaphragm will be rolled onto the paper roll through the winding roller. The wound diaphragm will be uneven in the middle, resulting in the trimming position being easily affected by the external environment and causing uneven cuts.

[0003] At present, when the existing lithium battery diaphragm is rolled up, tension control is mainly used to reduce the unevenness in the middle, that is, to check whether the rolling tension is uniform. If the tension is inconsistent during the rolling process, it may cause unevenness in the middle of the film. The parameters of the tension control system can be adjusted to ensure that the tension is stable and moderate during the entire rolling process.

[0004] However, the tension control needs to set the initial tension and tension change curve according to the material, thickness, width, etc. of the diaphragm, and the testing and debugging is time-consuming and costly. On the one hand, there are usable white edges on both sides of the diaphragm. The traditional method is to cut off the white edges to ensure the quality of winding. On the other hand, the diaphragm is an insulator, and the friction with multiple sets of rollers will generate static electricity. Static electricity causes the diaphragm to stick or drift, which will cause the slitting or trimming to form a wavy shape. Although the ion fan can remove static electricity, the wind blown by the fan will cause the diaphragm to vibrate, resulting in different slitting or trimming widths, and even the trimming will deviate into an arc. Secondly, when the diaphragm is rolled up, the paper tube set on the winding roller is easily deformed by external forces. The existing steel roller with convexity will increase the number of diaphragms on the outside of the paper tube and increase the diameter as the winding time goes by. The outer diaphragm exerts radial pressure on the paper tube. The tension on the paper tube accumulates as the roll diameter increases, and finally the paper tube is deformed, the winding diameter changes, and the direction deviates, resulting in the trimming deviation.

[0005] Therefore, a transmission device for lithium battery diaphragms and a working method thereof are proposed to solve the problems of unevenness in the middle of diaphragm winding, uneven slitting and cutting edges caused by vibration, and winding deviation caused by paper tube deformation. Summary of the invention

[0006] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a transmission device for lithium battery diaphragms and a working method thereof that reduces vibration, improves the quality of slitting and trimming, improves the quality of winding, and reduces costs.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a transmission device for lithium battery diaphragm, comprising a transmission roller assembly, two groups of ion fans are symmetrically arranged on one side of the transmission roller assembly, and flattening assemblies are arranged at the bottom ends of the two groups of ion fans, and slitting assemblies are arranged at the bottom ends of the flattening assemblies, and a winding drive assembly is arranged on one side of the slitting assembly, and two groups of roll-changing rocker bars are arranged on the side of the roll-changing rocker bars away from the slitting assembly, and a lithium battery diaphragm winding roller assembly is arranged on the top of the roll-changing rocker bars; wherein the two groups of flattening assemblies are symmetrically arranged; the transmission roller assembly comprises a first transmission roller, a slitting auxiliary roller is arranged at the bottom end of the first transmission roller, and a second transmission roller is arranged on one side of the slitting auxiliary roller; the flattening assembly comprises a flattening support table, a distance-controlling electric cylinder is arranged at the top of the flattening support table, and two groups of platform slides are opened at the bottom end of the flattening support table The movable groove is provided with a rolling mechanism on one side of the flattening support platform, and two groups of flattening guide rails are provided at the bottom end of the flattening support platform; the slitting assembly includes two groups of slitting guide rails, and the two groups of slitting guide rails are symmetrically arranged along the axis of the slitting auxiliary roller, and multiple groups of slitting sliders are arranged at the top of the slitting slider, and a slitting mounting plate is arranged at the top of the slitting mounting plate, and a fixed handle is arranged at the top of the slitting mounting plate, and one side of one group of slitting guide rails is provided with a clamping push rod; the winding drive assembly includes a winding drive roller, and a sliding guide rod is arranged at the top of the winding drive roller, and two groups of roller changing clamps are arranged on the side of the sliding guide rod close to the slitting assembly, and a winding cutting knife is arranged at the top of the sliding guide rod; the lithium battery diaphragm winding roller assembly includes two groups of support driving mechanisms, a support mechanism is arranged between the two groups of support driving mechanisms, and multiple groups of support bars are connected to the outside of the support mechanism.

[0008] The present invention is further configured as follows: the platform sliding groove is adapted to the shape of the flattening guide rail, the flattening support platform is slidably connected to the flattening guide rail, the flattening support platform is fixedly connected to the distance controlling electric cylinder, a circular hole adapted to the shape of the distance controlling electric cylinder output shaft is opened on one side of the flattening support platform, and the distance controlling electric cylinder output shaft is slidably connected to the flattening support platform.

[0009] The present invention is further configured as follows: the rolling mechanism includes a first distance control block, the first distance control block is fixedly connected to the output shaft of the distance control electric cylinder, a second distance control block is arranged on one side of the first distance control block, a clamping mechanism is arranged on one side of the first distance control block and the second distance control block, a group of rubber flattening rollers are arranged on the other side of the first distance control block and the second distance control block, a connecting shaft mechanism is arranged on one side of the first distance control block and the second distance control block, a sprocket mechanism is arranged on the side of the connecting shaft mechanism away from the rubber flattening roller, a driving motor is arranged on the side of the sprocket mechanism away from the clamping mechanism, and a motor mounting plate is fixedly connected to the side of the driving motor close to the sprocket mechanism.

[0010] The present invention is further configured as follows: the clamping mechanism comprises a first connecting rod, a second connecting rod, a third connecting rod, and a central latch, and the clamping mechanism is suitable for driving the two groups of rubber flattening rollers to move relative to each other;

[0011] The connecting shaft mechanism comprises a first distance control shaft, a second distance control shaft, and an auxiliary distance control shaft, and the connecting shaft mechanism is suitable for providing an installation environment for the sprocket mechanism;

[0012] The sprocket mechanism comprises a first sprocket, a driving sprocket, a second sprocket, a sprocket bearing, a first auxiliary sprocket, a third sprocket, and a second auxiliary sprocket. The sprocket mechanism is suitable for providing transmission for the two groups of rubber flattening rollers to rotate in opposite directions.

[0013] By adopting the above technical solution, the movement of the first distance control block drives the first connecting rod to swing, and the first connecting rod drives the second connecting rod and the third connecting rod to move synchronously, so that the two sets of rubber flattening rollers can move relative to each other. At the same time, through the cooperation of the chain and the sprocket, the two sets of rubber flattening rollers can rotate relative to each other, and the distance between the two sets of rubber flattening rollers is controlled to be greater than the thickness of one layer of diaphragm and less than the thickness of the films on both sides, so that the mechanism as a whole can roll the white edges on both sides of the diaphragm to both sides, and at the same time, it can also stretch and flatten the middle of the entire diaphragm, thereby improving the quality of subsequent slitting or trimming.

[0014] The present invention is further configured as follows: the slitting slider is slidably connected to the slitting guide rail, a cutting mechanism is provided on one side of one group of the slitting mounting plates, and a clamping mechanism is provided on one side of another group of slitting mounting plates symmetrical thereto; the cutting mechanism comprises a tool mounting bar, a cutting knife is provided on the tool mounting bar close to the side of the slitting auxiliary roller, two groups of first pairs of clamping blocks are installed on the top of the slitting mounting plate, the first pair of clamping blocks are configured as an L-shaped structure, and the first pair of clamping blocks are rotatably connected to the first pressure wheel close to the side of the slitting auxiliary roller; the clamping mechanism comprises two groups of second pairs of clamping blocks, the second pair of clamping blocks are configured as an L-shaped structure, the height of the second pair of clamping blocks is greater than that of the first pair of clamping blocks, and the second pair of clamping blocks are rotatably connected to the second pressure wheel close to the side of the slitting auxiliary roller.

[0015] By adopting the above technical solution, the first pressure wheel is used to clamp the diaphragm on one side, and the second pair of clamps is connected to the second pressure wheel for rotation close to the side of the slitting auxiliary roller. The second pressure wheel clamps the diaphragm on the other side, thereby reducing the vibration of the ion fan on the diaphragm. Then, the diaphragm is cut or trimmed by a cutting knife, thereby improving the quality of cutting and trimming.

[0016] The present invention is further configured as follows: the drive shafts at both ends of the winding drive roller are rotatably connected to two sets of sliding guide rods, the roller changing clamp is fixedly connected to the sliding guide rods, and the winding cutting knife is slidably connected to the sliding guide rods.

[0017] The present invention is further configured as follows: the supporting driving mechanism includes a supporting cylinder, the output end of the supporting cylinder is connected to a clamping roller block, the bottom end of the clamping roller block is provided with a push slide groove, the bottom end of the clamping roller block is provided with a push slide rail, the push slide groove is adapted to the shape of the push slide rail, the clamping roller block is slidably connected to the push slide rail, the top end of the clamping roller block is slidably connected to a roller clamp block, and roller bearings are provided at both ends of the roller clamp block.

[0018] The present invention is further configured as follows: the support mechanism comprises a plurality of groups of spreading mechanisms, the plurality of groups of spreading mechanisms are symmetrically arranged along the center of the support mechanism, wherein connecting strips are arranged between the plurality of groups of spreading mechanisms on one side, and a central roller is arranged at the center of the connecting strips.

[0019] The present invention is further configured as follows: the expansion mechanism includes an expansion push platform, the expansion push platform is slidably connected to the central roller shaft, a hinge ring is arranged on one side of the expansion push platform, multiple groups of first support connecting rods are hinged around one side of the hinge ring, multiple groups of second support connecting rods are hinged on the other side of the multiple groups of first support connecting rods, the number of multiple groups of second support connecting rods is the same as that of the first support connecting rods, the other side of the multiple groups of second support connecting rods is hinged with an expansion fixed platform, the outer sides of the multiple groups of second support connecting rods are fixedly connected with support strips, one side of the connecting strips is fixedly connected to the expansion push platform, and the other side is fixedly connected to the expansion fixed platform.

[0020] By adopting the above technical solution, the clamping roller block is pushed by the supporting cylinder, so that multiple groups of opening mechanisms are opened, and the supporting bars move synchronously to support the paper tube, reduce the possibility of deformation of the paper tube due to external stress, improve the winding quality, and the non-deformed paper tube can be reused many times, reducing the purchase quantity of paper tubes and reducing costs.

[0021] A working method for a transmission device for a lithium battery diaphragm, using the transmission device for the lithium battery diaphragm as described above, comprises the following steps:

[0022] S1. The staff places the winding roller including the support bar and the support mechanism on the roller changing clamp and the roll changing swing rod, and the paper tube is sleeved on the outer side of the winding roller;

[0023] S2, the lithium battery diaphragm passes over the first transmission roller, and the ion wind with the opposite electrode of the electrostatic charge of the lithium battery diaphragm is blown to the lithium battery diaphragm by the ion blower;

[0024] S3, the folded edges on both sides of the lithium battery diaphragm are stretched and stretched by a flattening component;

[0025] S4, the lithium battery diaphragm is cut on the opposite side at the cutting position of the lithium battery diaphragm by a cutting mechanism and a clamping mechanism;

[0026] S5, the lithium battery diaphragm passes under the slitting auxiliary roller and the second transmission roller, and enters the paper tube sleeved on the outer side of the winding roller clamped by the roll-changing swing rod from above the winding drive roller;

[0027] S6, after the lithium battery diaphragm on the outer paper tube of the winding roller clamped by the roll-changing swing rod is wound, the winding cutting knife slides from one side of the sliding guide rod to the other side to cut off the lithium battery diaphragm;

[0028] S7, another winding roller clamped by the roller changing clamp rewinds the cut lithium battery diaphragm, and at the same time, the roll changing swing rod is driven by the cylinder to swing, driving the clamped winding roller to leave the working position;

[0029] S8, the driving cylinder makes the roll-changing swing rod swing back to the working position, and the sliding guide rod, the roll-changing clamp, and the winding cutting knife rotate together in the direction of the roll-changing swing rod, driving the other winding roller clamped by the roll-changing clamp to be placed on the roll-changing swing rod to continue winding.

[0030] In summary, the present application includes at least one of the following beneficial technical effects:

[0031] 1. The movement of the first distance control block drives the first connecting rod to swing, and the first connecting rod drives the second connecting rod and the third connecting rod to move synchronously, so that the two sets of rubber flattening rollers can move relative to each other. At the same time, through the cooperation of the chain and the sprocket, the two sets of rubber flattening rollers can rotate relative to each other. The distance between the two sets of rubber flattening rollers is controlled to be greater than the thickness of one layer of diaphragm and less than the thickness of the films on both sides, so that the mechanism as a whole can roll the white edges on both sides of the diaphragm to both sides, and at the same time, it can also stretch and flatten the middle of the entire diaphragm, thereby improving the quality of subsequent slitting or trimming.

[0032] 2. The first pressing wheel is used to clamp the diaphragm on one side, and the second pair of clamping blocks is connected to the second pressing wheel on the side close to the slitting auxiliary roller. The second pressing wheel clamps the diaphragm on the other side to reduce the vibration of the ion fan on the diaphragm. Then, the diaphragm is slit or trimmed by the cutting knife to improve the quality of slitting and trimming.

[0033] 3. The support cylinder pushes the clamping roller block to open multiple groups of opening mechanisms, and the support bars move synchronously to support the paper tube, reduce the possibility of deformation of the paper tube due to external stress, improve the winding quality, and the non-deformed paper tube can be reused many times, reducing the purchase quantity of paper tubes and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural schematic diagram of a transmission device for lithium battery diaphragm of the present invention;

[0035] Figure 2 It is a structural schematic diagram of another perspective of the present invention;

[0036] Figure 3It is a schematic diagram of the structure of the flattening component in the present invention;

[0037] Figure 4 It is a partial exploded schematic diagram of the rolling mechanism in the present invention;

[0038] Figure 5 It is a partial structural schematic diagram of the rolling mechanism in the present invention;

[0039] Figure 6 for Figure 2 A partial enlarged view of the middle B area;

[0040] Figure 7 for Figure 1 A partial enlarged view of the middle A area;

[0041] Figure 8 It is a schematic diagram of the structure of the cutting assembly in the present invention;

[0042] Fig. 9 It is a structural schematic diagram of the lithium battery diaphragm winding roller assembly of the present invention;

[0043] Fig.10 This is a schematic diagram of the internal structure of the lithium battery diaphragm winding roller assembly of the present invention;

[0044] Fig.11 It is an exploded schematic diagram of the support driving mechanism in the present invention;

[0045] Fig.12 It is an exploded schematic diagram of the propping mechanism and the connecting strip in the present invention;

[0046] Description of reference numerals: 1, transmission roller assembly; 11, first transmission roller; 12, slitting auxiliary roller; 13, second transmission roller;

[0047] 2. Ion fan;

[0048] 3. Flattening assembly; 31. Flattening support table; 32. Distance control electric cylinder; 33. Platform sliding groove; 34. Rolling mechanism; 341. First distance control block; 342. Second distance control block; 343. Clamping mechanism; 3431. First connecting rod; 3432. Second connecting rod; 3433. Third connecting rod; 3434. Center latch; 344. Rubber flattening roller; 345. Connecting shaft mechanism; 3451. First distance control shaft; 3452. Second distance control shaft; 3453. Auxiliary distance control shaft; 346. Sprocket mechanism; 3461. First sprocket; 3462. Driving sprocket; 3463. Second sprocket; 3464. Sprocket bearing; 3465. First auxiliary sprocket; 3466. Third sprocket; 3467. Second auxiliary sprocket; 347. Driving motor; 348. Motor mounting plate; 35. Flattening guide rail;

[0049] 4. Slitting assembly; 41. Slitting guide rail; 42. Slitting slider; 43. Slitting mounting plate; 44. Fixed handle; 45. Cutting mechanism; 451. Tool mounting strip; 452. Cutting knife; 453. First pair of clamping blocks; 454. First pressing wheel; 46. Clamping mechanism; 461. Second pair of clamping blocks; 462. Second pressing wheel; 47. Clamping push rod;

[0050] 5. Winding drive assembly; 51. Winding drive roller; 52. Sliding guide rod; 53. Roller changing clamp; 54. Winding cutting knife;

[0051] 6. Roll-changing swing rod;

[0052] 7. Lithium battery diaphragm winding roller assembly; 71. Support driving mechanism; 711. Support cylinder; 712. Roller clamping block; 713. Push slide; 714. Push slide; 715. Roller clamping block; 716. Roller bearing; 72. Support bar; 73. Support mechanism; 731. Spreading mechanism; 7311. Spreading push platform; 7312. First support connecting rod; 7313. Second support connecting rod; 7314. Spreading fixed platform; 7315. Articulated ring; 732. Connecting bar; 733. Center roller shaft. DETAILED DESCRIPTION

[0053] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0054] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0055] See also Figure 1-12 , the present invention provides the following technical solutions:

[0056] Example 1, see Figure 1 A transmission device for lithium battery diaphragm includes a transmission roller assembly 1, which is an auxiliary roller shaft of the device. The lithium battery diaphragm passes through the roller shaft of the transmission roller assembly 1 to provide transmission for the lithium battery diaphragm. The specific structure of the transmission roller assembly 1 is as follows:

[0057] See also Figure 2The transmission roller assembly 1 includes a first transmission roller 11, a slitting auxiliary roller 12 is arranged at the bottom end of the first transmission roller 11, a second transmission roller 13 is arranged on one side of the slitting auxiliary roller 12, and a winding drive assembly 5 is arranged on one side of the second transmission roller 13. The lithium battery diaphragm processed in the previous process bypasses from the upper side of the first transmission roller 11 close to the winding drive assembly 5, and then bypasses from the bottom of the slitting auxiliary roller 12 and the second transmission roller 13. The multiple rollers are reasonably arranged to provide a clear running track for the lithium battery diaphragm. During the winding process, the lithium battery diaphragm needs to be transmitted in a specific direction and position to ensure the neatness and stability of the winding. These rollers are like guide wheels on the track, guiding the lithium battery diaphragm to move along the correct path to prevent the lithium battery diaphragm from deviating or twisting. At the same time, multiple rollers can provide stable tension to prevent the lithium battery diaphragm from loosening or breaking.

[0058] See also Figure 2 and Figure 6 The winding drive assembly 5 includes a winding drive roller 51, a sliding guide rod 52 is arranged at the top of the winding drive roller 51, two sets of roller changing clamps 53 are arranged on the side of the sliding guide rod 52 close to the slitting assembly 4, and a winding cutting knife 54 is arranged at the top of the sliding guide rod 52. The driving shafts at both ends of the winding drive roller 51 are rotatably connected to the two sets of sliding guide rods 52, the roller changing clamps 53 are fixedly connected to the sliding guide rods 52, and the winding cutting knife 54 is slidably connected to the sliding guide rods 52. The sliding guide rod 52, the roller changing clamp 53, and the winding cutting knife 54 are driven by the same motor. When the roller needs to be changed, the sliding guide rod 52, the roller changing clamp 53, and the winding cutting knife 54 rotate together in the direction of the winding swing rod 6, which can save the time of roller changing and improve work efficiency. In the process of manual roller changing, it is easy to be affected by human factors, such as improper operation and uneven force, which may cause problems such as uneven winding and uneven tension of the lithium battery diaphragm, thereby affecting product quality. The automatic roll changing system can accurately control various parameters in the roll changing process, reduce human errors and ensure the stability of product quality.

[0059] The existing lithium battery diaphragm winding equipment is not flat in the middle, which will cause buckling, that is, the lithium battery diaphragm will bend, wrinkle or deform under certain conditions. At the same time, folding will occur on both sides of the diaphragm.

[0060] For this purpose, see Figure 1-2 Two sets of flattening components 3 are arranged at the bottom end of the first transmission roller 11. The two sets of flattening components 3 are arranged symmetrically. The specific structure of the flattening components 3 is as follows:

[0061] See also Figure 3The flattening assembly 3 includes a flattening support platform 31, a distance control electric cylinder 32 is arranged on the top of the flattening support platform 31, two groups of platform sliding grooves 33 are opened at the bottom of the flattening support platform 31, a rolling mechanism 34 is arranged on one side of the flattening support platform 31, two groups of flattening guide rails 35 are arranged at the bottom of the flattening support platform 31, the platform sliding grooves 33 are adapted to the shape of the flattening guide rails 35, the flattening support platform 31 is slidably connected to the flattening guide rails 35, the flattening support platform 31 is fixedly connected to the distance control electric cylinder 32, a round hole adapted to the shape of the output shaft of the distance control electric cylinder 32 is opened on one side of the flattening support platform 31, and the output shaft of the distance control electric cylinder 32 is slidably connected to the flattening support platform 31. The flattening support platform 31 slides on the flattening guide rail 35 and can be adjusted according to the width of the lithium battery diaphragm. The distance control electric cylinder 32 can drive the components inside the rolling mechanism 34 to be clamped or loosened. The folded edges on both sides of the diaphragm need to be flattened by the rolling mechanism 34. The specific structure of the rolling mechanism 34 is as follows:

[0062] See also Figure 3-5 The rolling mechanism 34 includes a first distance control block 341, which is fixedly connected to the output shaft of the distance control electric cylinder 32, a second distance control block 342 is arranged on one side of the first distance control block 341, a clamping mechanism 343 is arranged on one side of the first distance control block 341 and the second distance control block 342, a group of rubber flattening rollers 344 are arranged on the other side of the first distance control block 341 and the second distance control block 342, a connecting shaft mechanism 345 is arranged on one side of the first distance control block 341 and the second distance control block 342, a sprocket mechanism 346 is arranged on the side of the connecting shaft mechanism 345 away from the rubber flattening roller 344, a driving motor 347 is arranged on the side of the sprocket mechanism 346 away from the clamping mechanism 343, and a motor mounting plate 348 is fixedly connected to the side of the driving motor 347 close to the sprocket mechanism 346. The distance control electric cylinder 32 drives the first distance control block 341 to move, and the movement of the first distance control block 341 drives the clamping mechanism 343 to clamp or loosen, and the clamping mechanism 343 drives the second distance control block 342 to move synchronously, and the driving motor 347 drives the sprocket mechanism 346 to rotate, and the operation of the sprocket mechanism 346 drives the two sets of rubber flattening rollers 344 to rotate relative to each other, so as to flatten and stretch the lithium battery diaphragm. Among them, the clamping or loosening of the two sets of rubber flattening rollers 344 needs to be synchronized, otherwise it is easy to cause damage to one side of the diaphragm. For this reason, the rubber flattening rollers 344 are used to realize the synchronous clamping or loosening of the two sets of clamping mechanisms 343. The specific structure of the clamping mechanism 343 is as follows:

[0063] See also Figure 5The clamping mechanism 343 includes a first connecting rod 3431, a second connecting rod 3432, a third connecting rod 3433, and a central latch 3434. The clamping mechanism 343 is suitable for driving the two groups of rubber flattening rollers 344 to move relative to each other; one side of the first connecting rod 3431 is plugged with the first distance control block 341, and the top of the first connecting rod 3431 is provided with a second connecting rod 3432, and one side of the second connecting rod 3432 is plugged with the second distance control block 342. A clamping mechanism 343 is provided at the bottom end, and a central pin 3434 is inserted in the center of the first connecting rod 3431, the second connecting rod 3432, and the third connecting rod 3433. The third connecting rod 3433 is fixedly connected to the motor mounting plate 348. The first distance control block 341 moves to drive the first connecting rod 3431 to swing, and the first connecting rod 3431 drives the second connecting rod 3432 and the third connecting rod 3433 to move synchronously, so that the two groups of rubber flattening rollers 344 can move relative to each other. The rotation of the two groups of rubber flattening rollers 344 needs to rotate in opposite directions at the same time, so a connecting shaft mechanism 345 is required to drive them to rotate. The specific structure of the connecting shaft mechanism 345 is as follows:

[0064] See also Figure 5 The connecting shaft mechanism 345 includes a first distance control shaft 3451, a second distance control shaft 3452, and an auxiliary distance control shaft 3453. The connecting shaft mechanism 345 is suitable for providing an installation environment for the sprocket mechanism 346; the first distance control shaft 3451 is fixedly connected to the rubber flattening roller 344 close to the side of the first distance control block 341, the first distance control shaft 3451 is rotatably connected to the first distance control block 341, one side of the second distance control block 342 is rotatably connected with the second distance control shaft 3452, the second distance control shaft 3452 is fixedly connected to another group of rubber flattening rollers 344, the second distance control block 342 is rotatably connected with the auxiliary distance control shaft 3453 on the side away from the second distance control shaft 3452, the first distance control shaft 3451 rotates to drive one group of rubber flattening rollers 344 to rotate, the second distance control shaft 3452 drives the other group of rubber flattening rollers 344 to rotate, and the auxiliary distance control shaft 3453 assists the second distance control shaft 3452 to rotate. The movement of the driven shaft will lead to the change of the driving position, so it can only be achieved by using a sprocket structure. For this purpose, the relative rotation of the rubber flattening roller 344 is achieved by a sprocket mechanism 346. The specific structure of the sprocket mechanism 346 is as follows:

[0065] See also Figure 4The sprocket mechanism 346 includes a first sprocket 3461, a driving sprocket 3462, a second sprocket 3463, a sprocket bearing 3464, a first auxiliary sprocket 3465, a third sprocket 3466, and a second auxiliary sprocket 3467. The sprocket mechanism 346 is suitable for providing transmission for the two groups of rubber flattening rollers 344 to rotate in opposite directions; the first sprocket 3461 is fixedly connected to the first control shaft 3451, the driving sprocket 3462 is fixedly connected to one side of the output shaft of the driving motor 347, the top of the second control shaft 3452 is provided with a sprocket bearing 3464, the inner wall of the sprocket bearing 3464 is fixedly connected to the second control shaft 3452, and the outer wall of the sprocket bearing 3464 is fixedly connected There is a second sprocket 3463, and the first sprocket 3461, the driving sprocket 3462, and the second sprocket 3463 are meshed with a shape-matching chain on the outside, and the first auxiliary sprocket 3465 is meshed with the outside of the chain, and the first auxiliary sprocket 3465 is fixedly connected to the auxiliary distance control shaft 3453, and a third sprocket 3466 is arranged on the top of the sprocket bearing 3464, and the third sprocket 3466 is fixedly connected to the second distance control shaft 3452, and a second auxiliary sprocket 3467 is arranged on the top of the first auxiliary sprocket 3465, and the second auxiliary sprocket 3467 is fixedly connected to the auxiliary distance control shaft 3453, and the third sprocket 3466 is meshed with the outside of the second auxiliary sprocket 3467 by a shape-matching chain. The driving motor 347 rotates to drive the active sprocket 3462 to rotate, and the active sprocket 3462 rotates to drive the chain to move. The chain drives the first sprocket 3461 and the second sprocket 3463 to rotate. The first sprocket 3461 rotates to drive the first control shaft 3451 to rotate. The first control shaft 3451 drives one group of rubber flattening rollers 344 to rotate. Because the other group of rubber flattening rollers 344 needs to rotate in the opposite direction, the sprocket bearing 3464 at the center of the second sprocket 3463 prevents the second control shaft 3452 from rotating, but instead rotates in the opposite direction through the engagement of the first auxiliary sprocket 3465 on the outside of the chain. The first auxiliary sprocket 3465 drives the auxiliary control shaft 3453 to rotate, and the auxiliary control shaft 3453 rotates to drive the second auxiliary sprocket 3467 to rotate. The chain outside the second auxiliary sprocket 3467 drives the third sprocket 3466 to rotate, thereby causing the second control shaft 3452 to rotate in the opposite direction, thereby realizing relative rotation of the two groups of rubber flattening rollers 344.

[0066] The above mechanisms cooperate to achieve the flattening of the white edges on both sides of the lithium battery diaphragm and the stretching of the middle bend, thereby improving the quality of diaphragm slitting and trimming, and at the same time, improving the utilization rate of the diaphragm.

[0067] Embodiment 2: During the slitting or trimming process of the diaphragm, the diaphragm is an insulator. After friction with multiple sets of rollers, static electricity will be generated on the surface of the diaphragm. The presence of static electricity will cause adhesion or drift between the diaphragms, and then form a wavy shape during the slitting or trimming process. Currently, static electricity is removed by an ion blower. However, the ion blower will cause the diaphragm to vibrate when blowing air to the diaphragm. At this time, slitting or trimming will cause inconsistent slitting or trimming widths, and even the vibration will cause the trimming to deviate to one side to form an arc shape.

[0068] See also Figure 1 For this purpose, two groups of ion fans 2 are symmetrically arranged on one side of the transmission roller assembly 1. The ion fans 2 blow air to the surface of the diaphragm to remove the static electricity on the surface of the diaphragm. A slitting assembly 4 is arranged at the bottom of the ion fan 2. The slitting assembly 4 clamps the opposite side of the diaphragm to reduce the influence of vibration on slitting or trimming. The specific structure of the slitting assembly 4 is as follows:

[0069] See also Figure 6-7 The slitting assembly 4 includes two groups of slitting guide rails 41, which are symmetrically arranged along the axis of the slitting auxiliary roller 12. Multiple groups of slitting sliders 42 are arranged at the top of the slitting guide rails 41, and a slitting mounting plate 43 is arranged at the top of the slitting slider 42. A fixed handle 44 is arranged at the top of the slitting mounting plate 43, and a clamping push rod 47 is arranged on one side of one group of slitting guide rails 41; the slitting sliders 42 are slidably connected to the slitting guide rails 41, and a cutting mechanism 45 is arranged on one side of one group of slitting mounting plates 43, and a clamping mechanism 46 is arranged on one side of the other group of slitting mounting plates 43 symmetrical thereto. The driving clamp push rod 47 drives one group of slitting guide rails 41 to move, and the overall position of multiple groups of cutting mechanisms 45 can be controlled at the same time. The slitting slider 42 slides on the slitting guide rail 41 to adjust the spacing of the knives. It can be adjusted according to the needs of the diaphragm. The overall position is fixed by the fixed handle 44. The positions of the cutting mechanism 45 and the clamping mechanism 46 are adjusted by a group of slitting sliders 42, slitting mounting plates 43 and fixed handles 44 respectively arranged at the bottom thereof. When the cutting mechanism 45 is determined according to the slitting and trimming positions, the corresponding fixed handles 44 are locked, and the slitting slider 42, slitting mounting plates 43 and fixed handles 44 at the bottom of the clamping mechanism 46 are adjusted so that the position of the clamping mechanism 46 is on the same horizontal line as the position of the cutting mechanism 45. At this time, the cutting mechanism 45 and the clamping mechanism 46 can clamp the diaphragm, reduce the vibration of the diaphragm caused by the ion fan 2, improve the accuracy of slitting and trimming, and improve the product quality. The specific structure of the cutting mechanism 45 is as follows:

[0070] See also Figure 8The cutting mechanism 45 includes a tool mounting bar 451, a cutting knife 452 is mounted on the side of the tool mounting bar 451 close to the slitting auxiliary roller 12, two sets of first pairs of clamping blocks 453 are mounted on the top of the slitting mounting plate 43, the first pair of clamping blocks 453 are set as an L-shaped structure, the first pair of clamping blocks 453 are rotatably connected to the side close to the slitting auxiliary roller 12 with a first pressing wheel 454, the diaphragm is cut or trimmed by the cutting knife 452, and the diaphragm on one side is clamped by the first pressing wheel 454 to reduce vibration and improve the quality of slitting and trimming. The other side needs to be clamped by a clamping mechanism 46, and the specific structure of the clamping mechanism 46 is as follows:

[0071] See also Figure 8 The clamping mechanism 46 includes two groups of second pairs of clamping blocks 461. The second pair of clamping blocks 461 are set to an L-shaped structure. The height of the second pair of clamping blocks 461 is greater than that of the first pair of clamping blocks 453. The second pair of clamping blocks 461 are rotatably connected to the side close to the slitting auxiliary roller 12 with a second pressure wheel 462. The second pressure wheel 462 clamps the diaphragm on the other side to reduce vibration and improve the quality of slitting and trimming.

[0072] In the third embodiment, when the diaphragm is wound, a paper tube is sleeved on the winding roller, and the paper tube is easily deformed by external force. The existing winding roller is a steel roller with a protrusion. As the winding time goes by, the diaphragm on the outside of the paper tube is wrapped more and more, and its diameter becomes larger and larger. The diaphragm on the outside will form radial pressure on the internal paper tube. The tension on the internal paper tube is not equal to the tension applied by the equipment during winding, but is a force accumulated synchronously with the increase in the roll diameter, which will eventually cause the paper tube to deform, thereby changing the winding diameter, causing the winding direction to deviate, and thus causing the cutting edge to deviate to one side.

[0073] See also Figure 1 For this purpose, two groups of roll-changing swing rods 6 are arranged on the side of the winding drive assembly 5 away from the slitting assembly 4. A lithium battery diaphragm winding roller assembly 7 is arranged on the top of the roll-changing swing rod 6. The roll-changing swing rod 6 provides a clamping function for the lithium battery diaphragm winding roller assembly 7. The lithium battery diaphragm winding roller assembly 7 provides support for the paper roll to prevent the paper roll from deforming. The specific structure of the lithium battery diaphragm winding roller assembly 7 is as follows:

[0074] See also Fig. 9 The lithium battery diaphragm winding roller assembly 7 includes two groups of support drive mechanisms 71, a support mechanism 73 is arranged between the two groups of support drive mechanisms 71, and multiple groups of support bars 72 are connected to the outside of the support mechanism 73. The support bar 72 is in the shape of an outer support, and the support mechanism 73 provides support for the support bar 72. For this purpose, the support drive mechanism 71 provides drive for the paper tube support. The specific structure of the support drive mechanism 71 is as follows:

[0075] See also Fig.11The support drive mechanism 71 includes a support cylinder 711, the output end of the support cylinder 711 is connected to a clamping roller block 712, the bottom end of the clamping roller block 712 is provided with a push slide 713, the bottom end of the clamping roller block 712 is provided with a push slide rail 714, the push slide 713 is adapted to the push slide rail 714 in shape, the clamping roller block 712 is slidably connected to the push slide rail 714, the top end of the clamping roller block 712 is slidably connected to a roller clamp block 715, and roller bearings 716 are provided at both ends of the roller clamp block 715. The driving support cylinder 711 pushes the clamping roller block 712 to move, the clamping roller block 712 slides on the push slide rail 714, the movement of the clamping roller block 712 drives the roller clamp block 715 to move, and drives the internal components of the support mechanism 73 to move, and the support mechanism 73 is used to provide support for this purpose. The specific structure of the support mechanism 73 is as follows:

[0076] See also Fig.10 The support mechanism 73 includes multiple groups of spreading mechanisms 731, which are symmetrically arranged along the center of the support mechanism 73. A connecting bar 732 is arranged between the multiple groups of spreading mechanisms 731 on one side, and a central roller shaft 733 is arranged at the center of the connecting bar 732. The connecting bar 732 provides drive between the two groups of spreading mechanisms 731. Both ends of the central roller shaft 733 are fixedly connected to the inner wall of the roller bearing 716, so that the roller clamp 715 will not affect the rotation of the central roller shaft 733. For this purpose, the spreading mechanism 731 is used as a spreading frame to provide support force for the paper tube outside the support bar 72. The specific structure of the spreading mechanism 731 is as follows:

[0077] See also Fig.12 The expansion mechanism 731 includes an expansion push platform 7311, which is slidably connected to the central roller shaft 733. A hinge ring 7315 is arranged on one side of the expansion push platform 7311. Multiple groups of first support connecting rods 7312 are hinged around one side of the hinge ring 7315. Multiple groups of second support connecting rods 7313 are hinged on the other side of the multiple groups of first support connecting rods 7312. The number of multiple groups of second support connecting rods 7313 is the same as that of the first support connecting rods 7312. An expansion fixed platform 7314 is hinged on the other side of the multiple groups of second support connecting rods 7313. The outer sides of the multiple groups of second support connecting rods 7313 are fixedly connected to support bars 72. One side of the connecting bar 732 is fixedly connected to the expansion push platform 7311, and the other side is fixedly connected to the expansion fixed platform 7314. When the two groups of roller clamps 715 move toward the center at the same time, the roller clamps 715 push the expansion and pushing platform 7311 fixedly connected thereto, and the movement of the expansion and pushing platform 7311 drives the first supporting connecting rod 7312 to swing, and the swing of the first supporting connecting rod 7312 drives the second supporting connecting rod 7313 to swing, and the outermost connection position of the second supporting connecting rod 7313 and the connecting strip 732 moves toward or away from the center position, thereby supporting the paper tube, reducing the possibility of deformation of the paper tube due to external stress, improving the winding quality, and the non-deformed paper tube can be reused many times, reducing the purchase quantity of paper tubes and reducing costs.

[0078] Embodiment 4, a working method of a transmission device for a lithium battery diaphragm, using the transmission device for the lithium battery diaphragm, comprises the following steps:

[0079] S1. A staff member places a winding roller including a support bar 72 and a support mechanism 73 on the roller changing clamp 53 and the roll changing swing rod 6, and a paper tube is sleeved on the outer side of the winding roller;

[0080] S2, the lithium battery diaphragm passes over the first transmission roller 11, and the ion wind with the opposite electrode of the electrostatic charge of the lithium battery diaphragm is blown to the lithium battery diaphragm by the ion blower 2;

[0081] S3, the folded edges on both sides of the lithium battery diaphragm are stretched and stretched by the flattening component 3;

[0082] The more specific steps of S3 are:

[0083] S31, the flattening support platform 31 slides on the flattening guide rail 35 to adjust its position according to the width of the lithium battery diaphragm, and the first distance control block 341 is driven by the distance control electric cylinder 32 to move. The movement of the first distance control block 341 drives the first connecting rod 3431 to swing, and the first connecting rod 3431 drives the second connecting rod 3432 and the third connecting rod 3433 to move synchronously, that is, the second connecting rod 3432 swings in the opposite direction of the first connecting rod 3431, and the third connecting rod 3433 moves up or down. The swing of the second connecting rod 3432 drives the second distance control block 342 to move synchronously, and the movement of the third connecting rod 3433 drives the motor mounting plate 348 to move, so that the driving motor 347 moves up and down, and the rotation of the driving motor 347 drives the driving sprocket 3462 to rotate, and the rotation of the driving sprocket 3462 drives the chain to move, and the chain drives The first sprocket 3461 and the second sprocket 3463 rotate, and the rotation of the first sprocket 3461 drives the first distance control shaft 3451 to rotate, and the first distance control shaft 3451 drives one group of rubber flattening rollers 344 to rotate. Because the other group of rubber flattening rollers 344 needs to rotate in the opposite direction, the sprocket bearing 3464 at the center of the second sprocket 3463 prevents the second distance control shaft 3452 from rotating, but instead rotates in the opposite direction through the engagement of the first auxiliary sprocket 3465 on the outer side of the chain. The first auxiliary sprocket 3465 drives the auxiliary distance control shaft 3453 to rotate, and the rotation of the auxiliary distance control shaft 3453 drives the second auxiliary sprocket 3467 to rotate, and the chain outside the second auxiliary sprocket 3467 drives the third sprocket 3466 to rotate, so that the second distance control shaft 3452 rotates in the opposite direction, and the two groups of rubber flattening rollers 344 rotate relative to each other;

[0084] S4, the lithium battery diaphragm is cut on the opposite side of the cutting position of the lithium battery diaphragm by the cutting mechanism 45 and the clamping mechanism 46;

[0085] The more specific steps of S4 are:

[0086] S41, driving the clamping push rod 47 to drive one of the groups of cutting guide rails 41 to move, and the overall position of multiple groups of cutting mechanisms 45, that is, the front and rear positions of the cutter and the diaphragm can be adjusted at the same time;

[0087] S42, the slitting slider 42 slides on the slitting guide rail 41, the distance between the knives can be adjusted, and the adjustment can be made according to the needs of the diaphragm, and the overall position is fixed by the fixing handle 44;

[0088] S43, the cutting knife 452 cuts or trims the diaphragm, and the first pressing wheel 454 and the second pressing wheel 462 clamp the diaphragm;

[0089] S5, the lithium battery diaphragm passes under the slitting auxiliary roller 12 and the second transmission roller 13, and enters the paper tube sleeved on the outer side of the winding roller clamped by the roll-changing swing rod 6 from above the winding drive roller 51;

[0090] S6, after the lithium battery diaphragm on the outer paper tube of the winding roller clamped by the roll-changing swing rod 6 is wound, the winding cutting knife 54 slides from one side of the sliding guide rod 52 to the other side to cut off the lithium battery diaphragm;

[0091] S7, another winding roller clamped by the roller changing clamp 53 rewinds the cut lithium battery diaphragm, and at the same time, the winding changing swing rod 6 is driven by the cylinder to swing, driving the clamped winding roller to leave the working position;

[0092] S8, the driving cylinder makes the roll-changing swing rod 6 swing back to the working position, and the sliding guide rod 52, the roll-changing clamp 53, and the winding cutting knife 54 rotate together toward the roll-changing swing rod 6, driving the other winding roller clamped by the roll-changing clamp 53 to be placed on the roll-changing swing rod 6 to continue winding;

[0093] The more specific steps of S8 are:

[0094] S81. After the winding roller is placed on the supporting driving mechanism 71, the supporting cylinder 711 is driven to slide the clamping roller block 712 connected to the output end, and the clamping roller block 712 slides on the push rail 714. The movement of the clamping roller block 712 drives the roller clamp block 715 to move, and the connecting strip 732 provides drive between the two sets of opening mechanisms 731. Both ends of the central roller shaft 733 are fixedly connected to the inner wall of the roller bearing 716, so that the roller clamp block 715 will not affect the rotation of the central roller shaft 733. When the two sets of roller clamp blocks 715 move toward the center at the same time, the roller clamp block 715 pushes the opening push platform 7311 fixedly connected thereto, and the movement of the opening push platform 7311 drives the first supporting connecting rod 7312 to swing, and the swing of the first supporting connecting rod 7312 drives the second supporting connecting rod 7313 to swing, and the outermost connection position of the second supporting connecting rod 7313 and the connecting strip 732 moves toward or away from the center position to support the paper tube.

[0095] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

Claims

1. A transmission device for lithium battery diaphragm, characterized in that: It comprises a transmission roller assembly (1), two groups of ion fans (2) are symmetrically arranged on one side of the transmission roller assembly (1), flattening assemblies (3) are arranged at the bottom ends of the two groups of ion fans (2), a slitting assembly (4) is arranged at the bottom end of the flattening assembly (3), a winding drive assembly (5) is arranged on one side of the slitting assembly (4), two groups of roll-changing swing rods (6) are arranged on the side of the roll-changing swing rod (5) away from the slitting assembly (4), and a lithium battery diaphragm winding roller assembly (7) is arranged on the top end of the roll-changing swing rod (6); Wherein, the two groups of flattening components (3) are symmetrically arranged; The transmission roller assembly (1) comprises a first transmission roller (11), a slitting auxiliary roller (12) is arranged at the bottom end of the first transmission roller (11), and a second transmission roller (13) is arranged on one side of the slitting auxiliary roller (12); The flattening assembly (3) comprises a flattening support platform (31), a distance control electric cylinder (32) is arranged at the top of the flattening support platform (31), two sets of platform sliding grooves (33) are opened at the bottom of the flattening support platform (31), a rolling mechanism (34) is arranged on one side of the flattening support platform (31), and two sets of flattening guide rails (35) are arranged at the bottom of the flattening support platform (31); The slitting assembly (4) comprises two groups of slitting guide rails (41), the two groups of slitting guide rails (41) are symmetrically arranged along the axis of the slitting auxiliary roller (12), a plurality of groups of slitting sliders (42) are arranged at the top of the slitting guide rails (41), a slitting mounting plate (43) is arranged at the top of the slitting sliders (42), a fixed handle (44) is arranged at the top of the slitting mounting plate (43), a clamping push rod (47) is arranged on one side of one group of the slitting guide rails (41), the slitting sliders (42) are slidably connected to the slitting guide rails (41), a cutting mechanism (45) is arranged on one side of one group of the slitting mounting plates (43), and a clamping mechanism (46) is arranged on one side of the other group of slitting mounting plates (43) symmetrical thereto; The clamping push rod (47) is driven to drive one group of slitting guide rails (41) to move, so that the overall position of multiple groups of cutting mechanisms (45) can be controlled simultaneously. The slitting slider (42) slides on the slitting guide rail (41) to adjust the distance between the knives. The adjustment can be performed according to the needs of the diaphragm. The overall position is fixed by a fixed handle (44). When the cutting mechanism (45) is determined according to the slitting and trimming positions, the corresponding fixed handle (44) is locked, and the slitting slider (42), the slitting mounting plate (43) and the fixed handle (44) at the bottom of the clamping mechanism (46) are adjusted so that the position of the clamping mechanism (46) is on the same horizontal line as the position of the cutting mechanism (45). At this time, the cutting mechanism (45) and the clamping mechanism (46) can clamp the diaphragm. The winding drive assembly (5) comprises a winding drive roller (51), a sliding guide rod (52) is arranged at the top end of the winding drive roller (51), two groups of roller changing clamps (53) are arranged on the side of the sliding guide rod (52) close to the slitting assembly (4), and a winding cutting knife (54) is arranged at the top end of the sliding guide rod (52); The lithium battery diaphragm winding roller assembly (7) comprises two groups of support drive mechanisms (71), a support mechanism (73) is arranged between the two groups of support drive mechanisms (71), and a plurality of groups of support bars (72) are connected to the outer side of the support mechanism (73); The platform sliding groove (33) is adapted in shape to the flattening guide rail (35); the flattening support platform (31) is slidably connected to the flattening guide rail (35); the flattening support platform (31) is fixedly connected to the distance control electric cylinder (32); a circular hole adapted in shape to the output shaft of the distance control electric cylinder (32) is provided on one side of the flattening support platform (31); and the output shaft of the distance control electric cylinder (32) is slidably connected to the flattening support platform (31); The rolling mechanism (34) comprises a first distance control block (341), the first distance control block (341) being fixedly connected to the output shaft of the distance control electric cylinder (32), a second distance control block (342) being arranged on one side of the first distance control block (341), a clamping mechanism (343) being arranged on one side of the first distance control block (341) and the second distance control block (342), a group of rubber flattening rollers (344) being arranged on the other side of the first distance control block (341) and the second distance control block (342), a connecting shaft mechanism (345) being arranged on one side of the first distance control block (341) and the second distance control block (342), a sprocket mechanism (346) being arranged on the side of the connecting shaft mechanism (345) away from the rubber flattening roller (344), a driving motor (347) being arranged on the side of the sprocket mechanism (346) away from the clamping mechanism (343), and a motor mounting plate (348) being fixedly connected to the side of the driving motor (347) close to the sprocket mechanism (346); The clamping mechanism (343) comprises a first connecting rod (3431), and the clamping mechanism (343) is suitable for driving the two groups of rubber flattening rollers (344) to move relative to each other. One side of the first connecting rod (3431) is plugged into the first distance control block (341), and a second connecting rod (3432) is arranged at the top of the first connecting rod (3431), and one side of the second connecting rod (3432) is plugged into the second distance control block (342). The bottom end of the first distance control block (341) is provided with a clamping mechanism (343), and a center latch (3434) is plugged into the center of the first connecting rod (3431), the second connecting rod (3432), and the third connecting rod (3433), and the third connecting rod (3433) is fixedly connected to the motor mounting plate (348), and the third connecting rod (3433) is hingedly connected to the first connecting rod (3431) and the second connecting rod (3432) through the center latch (3434); The connecting shaft mechanism (345) comprises a first distance control shaft (3451), and the connecting shaft mechanism (345) is suitable for providing an installation environment for the sprocket mechanism (346); the first distance control shaft (3451) is fixedly connected to a rubber flattening roller (344) on a side close to the first distance control block (341); the first distance control shaft (3451) is rotatably connected to the first distance control block (341); one side of the second distance control block (342) is rotatably connected to a second distance control shaft (3452); the second distance control shaft (3452) is fixedly connected to another group of rubber flattening rollers (344); and the side of the second distance control block (342) away from the second distance control shaft (3452) is rotatably connected to an auxiliary distance control shaft (3453); The sprocket mechanism (346) comprises a first sprocket (3461), and the sprocket mechanism (346) is suitable for providing transmission for the two groups of rubber flattening rollers (344) to rotate in opposite directions. The first sprocket (3461) is fixedly connected to the first distance control shaft (3451), a driving sprocket (3462) is fixedly connected to one side of the output shaft of the driving motor (347), a sprocket bearing (3464) is arranged at the top end of the second distance control shaft (3452), the inner wall of the sprocket bearing (3464) is fixedly connected to the second distance control shaft (3452), and the outer wall of the sprocket bearing (3464) is fixedly connected to the second sprocket (3463), the first sprocket (3461), the driving sprocket (3462), The outer side of the second sprocket (3463) is meshed with a chain of matching shape, and the outer side of the chain is meshed with a first auxiliary sprocket (3465), and the first auxiliary sprocket (3465) is fixedly connected to the auxiliary distance control shaft (3453). A third sprocket (3466) is arranged at the top of the sprocket bearing (3464), and the third sprocket (3466) is fixedly connected to the second distance control shaft (3452). The top of the first auxiliary sprocket (3465) is arranged with a second auxiliary sprocket (3467), and the second auxiliary sprocket (3467) is fixedly connected to the auxiliary distance control shaft (3453). The third sprocket (3466) is meshed with the outer side of the second auxiliary sprocket (3467).

2. The transmission device for lithium battery diaphragm according to claim 1, characterized in that: The cutting mechanism (45) comprises a knife mounting bar (451), a cutting knife (452) being mounted on a side of the knife mounting bar (451) close to the slitting auxiliary roller (12), two groups of first pairs of clamping blocks (453) being mounted on the top of a slitting mounting plate (43) provided with the cutting mechanism (45), the first pair of clamping blocks (453) being arranged in an L-shaped structure, and a first pressing wheel (454) being rotatably connected to a side of the first pair of clamping blocks (453) close to the slitting auxiliary roller (12); The clamping mechanism (46) comprises two groups of second pairs of clamping blocks (461), the second pair of clamping blocks (461) being arranged in an L-shaped structure, the height of the second pair of clamping blocks (461) being greater than that of the first pair of clamping blocks (453), and the second pair of clamping blocks (461) being rotatably connected to a second pressing wheel (462) on one side close to the slitting auxiliary roller (12).

3. A transmission device for lithium battery diaphragm according to claim 2, characterized in that: The drive shafts at both ends of the winding drive roller (51) are rotatably connected to two sets of sliding guide rods (52), the roller changing clamp (53) is fixedly connected to the sliding guide rods (52), and the winding cutting knife (54) is slidably connected to the sliding guide rods (52).

4. The transmission device for lithium battery diaphragm according to claim 1, characterized in that: The support drive mechanism (71) comprises a support cylinder (711); the output end of the support cylinder (711) is connected to a clamping roller block (712); a push slide groove (713) is provided at the bottom end of the clamping roller block (712); a push slide rail (714) is provided at the bottom end of the clamping roller block (712); the push slide groove (713) and the push slide rail (714) are adapted in shape; the clamping roller block (712) and the push slide rail (714) are slidably connected; a roller clamping block (715) is slidably connected to the top end of the clamping roller block (712); roller bearings (716) are provided at both ends of the roller clamping block (715).

5. The transmission device for lithium battery diaphragm according to claim 4, characterized in that: The support mechanism (73) comprises a plurality of groups of spreading mechanisms (731), wherein the plurality of groups of spreading mechanisms (731) are symmetrically arranged along the centre of the support mechanism (73), wherein a connecting strip (732) is arranged between the plurality of groups of spreading mechanisms (731) on one side, and a central roller shaft (733) is arranged at the centre of the connecting strip (732).

6. The transmission device for lithium battery diaphragm according to claim 5, characterized in that: The spreading mechanism (731) comprises a spreading push platform (7311), the spreading push platform (7311) is slidably connected to the central roller (733), a hinge ring (7315) is provided on one side of the spreading push platform (7311), a plurality of groups of first supporting connecting rods (7312) are hingedly connected around one side of the hinge ring (7315), a plurality of groups of second supporting connecting rods (7313) are hingedly connected on the other side of the plurality of groups of the first supporting connecting rods (7312), the plurality of groups of the second supporting connecting rods (7313) are the same in number as the first supporting connecting rods (7312), a spreading fixed platform (7314) is hingedly connected on the other side of the plurality of groups of the second supporting connecting rods (7313), a support bar (72) is fixedly connected to the outer side of the plurality of groups of the second supporting connecting rods (7313), one side of the connecting bar (732) is fixedly connected to the spreading push platform (7311), and the other side is fixedly connected to the spreading fixed platform (7314).

7. A working method for a lithium battery diaphragm transmission device, using the lithium battery diaphragm transmission device according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. A staff member places a winding roller including a support bar (72) and a support mechanism (73) on a roller changing clamp (53) and a roll changing swing rod (6), and a paper tube is sleeved on the outer side of the winding roller; S2, the lithium battery diaphragm passes over the first transmission roller (11), and an ion wind having an electrostatically opposite polarity to the lithium battery diaphragm is blown toward the lithium battery diaphragm by the ion blower (2); S3, the folded edges on both sides of the lithium battery diaphragm are stretched and stretched by the flattening component (3); S4, the lithium battery diaphragm is cut on the opposite side at the cutting position of the lithium battery diaphragm by means of a cutting mechanism (45) and a clamping mechanism (46); S5, the lithium battery diaphragm passes under the slitting auxiliary roller (12) and the second transmission roller (13), and enters the paper tube sleeved on the outer side of the winding roller clamped by the roll-changing swing rod (6) from above the winding drive roller (51); S6, after the lithium battery diaphragm on the outer paper tube of the winding roller clamped by the winding swing rod (6) is wound, the winding cutting knife (54) slides from one side of the sliding guide rod (52) to the other side to cut the lithium battery diaphragm; S7, another winding roller clamped by the roller changing clamp (53) reels up the cut lithium battery diaphragm, and at the same time, the winding changing swing rod (6) is driven by the cylinder to swing, driving the clamped winding roller to leave the working position; S8, the driving cylinder causes the roll-changing swing rod (6) to swing back to the working position, and the sliding guide rod (52), the roll-changing clamp (53), and the winding cutting knife (54) rotate together in the direction of the roll-changing swing rod (6), driving the other winding roller clamped by the roll-changing clamp (53) to be placed on the roll-changing swing rod (6) to continue winding.

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