Pole piece traction device, coating equipment and battery production line

Abstract

The embodiment of the utility model provides a pole piece traction device, coating equipment and a battery production line. The pole piece traction device comprises a plurality of first passing rollers, second passing rollers and dampers, the first passing rollers are arranged in parallel at intervals and used for traction of pole pieces, the axes of the second passing rollers can be parallel to the axes of the first passing rollers or form included angles with the axes of the first passing rollers, and under the condition that the axes of the second passing rollers form included angles with the axes of the first passing rollers, the dampers are arranged on the first passing rollers. The axis of the second passing roller is not coplanar with the axis of at least one first passing roller, the damper is arranged on one side of the second passing roller, and the damper comprises a damping roller which abuts against the peripheral face of the second passing roller. Damping force can be applied to the second passing roller through the damping rolling wheel, the rotating speed of the second passing roller is reduced, sliding friction is generated between the pole piece and the peripheral face of the second passing roller, the sliding friction force is used for partially counteracting transverse pulling force applied to the pole piece by the second passing roller, the transverse deviation speed of the pole piece is reduced, and the wrinkling probability of the pole piece is reduced.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and more specifically, to a pole piece traction device, a coating device and a battery production line. Background Art

[0002] Coating is an important process in the manufacturing process of lithium batteries. Pole piece coating generally refers to a process in which a well-stirred slurry is evenly coated on a substrate and the organic solvent in the slurry is dried. In the actual production process, the coating process includes unwinding, coating, drying, traction and winding. In the traction link, when the pole piece passes through an inclined roller, the pole piece is unevenly stressed perpendicular to its direction of travel, causing the tension on one side of the pole piece to be larger and generating a lateral pulling force, causing the pole piece to move to one side under the action of the lateral pulling force. However, if the lateral pulling force is too large, the pole piece will move too fast laterally on the roller, resulting in wrinkles in the pole piece. Utility Model Content

[0003] The purpose of this application is to provide a pole piece traction device, coating equipment and battery production line, so as to reduce the probability of substrate wrinkles when the pole piece passes through the roller. This purpose is achieved through the following technical solutions:

[0004] In the first aspect, an embodiment of the present application provides a pole piece traction device, which includes: a plurality of first rollers, which are arranged in parallel and spaced apart and are used to pull the pole piece; a second roller, the axis of the second roller can be parallel to or arranged at an angle to the axis of the first roller, and when the axis of the second roller is at an angle to the axis of the first roller, the axis of the second roller is not coplanar with the axis of at least one first roller; a damper, which is arranged on one side of the second roller, the damper includes a damping roller, the damping roller is against the outer peripheral surface of the second roller, and the damping roller is used to apply a damping force to the second roller during the rotation of the second roller.

[0005] In the above scheme, a damper is arranged on one side of the second roller, and the damping roller in the damper is made to abut against the outer peripheral surface of the second roller. When the pole piece passes through the first roller and the second roller in sequence and drives the first roller and the second roller to rotate, the damper applies a damping force to the second roller through the damping roller, thereby reducing the rotation speed of the second roller, so that there is a rotation speed difference between the second roller and the first roller, and sliding friction is generated between the pole piece and the outer peripheral surface of the second roller, and the sliding friction force is used to partially offset the lateral pulling force applied to the pole piece by the second roller, thereby slowing down the lateral displacement speed of the pole piece and reducing the probability of pole piece wrinkles.

[0006] In some embodiments, the pole piece traction device further includes a mounting frame and a bracket assembly, the second roller includes a roller shaft and a roller body rotatably mounted outside the roller shaft, the roller shaft is arranged on the mounting frame, the damping roller is against the outer circumferential surface of the roller body, and the bracket assembly is respectively connected to the roller shaft and the damper.

[0007] In the above scheme, the damper is connected to the roller shaft of the second roller through the bracket assembly, so that the damper can deflect with the deflection of the second roller, thereby making the damping roller in the damper always maintain abutment with the outer peripheral surface of the roller body.

[0008] In some embodiments, the bracket assembly includes: a support, which is fixed to the roller shaft; a support plate, one of the support plate and the support is provided with a first sliding structure, and the other of the two is provided with a second sliding structure, the second sliding structure can be slidably connected to the first sliding structure along a first direction, the damper is installed on the support plate and is located on one side of the roller body along the first direction, and the first direction is set at an angle to the axis of the roller shaft.

[0009] In the above scheme, the support plate is arranged to be able to slide relative to the support in the first direction, so that the support plate can drive the damper to move in the first direction, and then adjust the relative position between the damping roller and the second roller in the first direction, so that the damping roller can contact the second roller after the position adjustment, and a certain pressure is maintained between the damping roller and the second roller, so that during the rotation of the second roller, the damping roller can more efficiently apply a damping force to the second roller, thereby reducing the rotation speed of the second roller. The connecting member is used to fix the support plate and the support after the relative position of the two is adjusted.

[0010] In some embodiments, the support plate includes a supporting portion, a sliding connection portion and a mounting portion connected in sequence, the damper is installed on the mounting portion, the supporting portion and the mounting portion are arranged relatively to each other along a first direction, the support is located between the supporting portion and the mounting portion, the supporting portion is provided with a threaded hole extending along the first direction, the bracket assembly also includes a connecting piece, the connecting piece is passed through the threaded hole and threadably matched with the threaded hole, and one end of the connecting piece facing the support abuts against the support.

[0011] In the above scheme, by rotating the connecting member, under the action of the threaded cooperation between the connecting member and the threaded hole, the connecting member can move along the first direction while rotating, so that the end of the connecting member facing the support can move along the first direction toward one side of the support. When the end of the connecting member facing the support extends out of the threaded hole and abuts against the support, continuing to drive the connecting member can make the support part and the support move away from each other in the first direction and the mounting part and the support move toward each other in the first direction, so that the mounting part drives the damper to move along the first direction toward the side close to the second roller, so that the damping roller is pressed against the outer peripheral surface of the roller body. It can be understood that if the connecting member is rotated in the opposite direction, the damper is moved along the first direction toward the side away from the second roller. Therefore, the relative position of the second roller and the damping roller along the first direction can be adjusted by rotating the connecting member to adjust the pressure between the damping roller and the second roller.

[0012] In some embodiments, the first sliding structure is configured as a sliding groove, and the second sliding structure is configured as a sliding portion that slides in cooperation with the sliding groove.

[0013] In the above solution, the cooperation between the slide groove and the sliding part is used to limit the sliding direction between the support plate and the support, so that the support plate slides on the support more stably.

[0014] In some embodiments, the sliding connection part is provided with a long hole, the length direction of the long hole is parallel to the first direction, and the long hole passes through the sliding connection part along the second direction, and the second direction is perpendicular to the axis of the roller shaft; the bracket assembly also includes at least one limit member, at least one limit member is columnar and extends along the second direction, the limit member is passed through the long hole and is connected to the support.

[0015] In the above solution, the sliding fit between the limiting member and the long hole can further improve the sliding stability of the support plate on the support.

[0016] In some embodiments, the limiter includes a connected main body and a cap, the main body is connected to the support, the cap is located on the side of the sliding connection away from the support, and along the second direction, the cap cooperates with the end face stopper on the side of the sliding connection away from the support.

[0017] In the above scheme, the support plate is limited by the cooperation of the cap portion and the end surface of the sliding connection portion which is away from the support. Under the stopping action of the cap portion, the support plate will not fall off the support.

[0018] In some embodiments, the damping roller includes a roller body and a flexible member sleeved outside the roller body, and the flexible member abuts against the outer peripheral surface of the second roller.

[0019] In the above scheme, the rubber ring is against the outer circumference of the second roller. On the one hand, the friction between the damping roller and the second roller is increased, and the probability of slipping of the damping roller and the second roller during rotation is reduced. On the other hand, the rubber ring is softer than the second roller, which can reduce the wear of the damping roller on the outer circumference of the second roller.

[0020] In some embodiments, the damper further includes an adjusting mechanism, which is transmission-connected to the damping roller, and is used to adjust the damping force of the damping roller.

[0021] In the above scheme, the damping force of the damping roller is adjusted by the adjustment mechanism, and the damping force output by the damper can be adjusted according to the size of the wrinkles after the pole piece passes through the second roller, so that the damping force output by the damper matches the actual demand.

[0022] In some embodiments, the adjustment mechanism includes: a shell assembly connected to the bracket assembly, the shell assembly having a cavity; a first magnetic component movably disposed in the cavity; a second magnetic component rotatably disposed in the cavity and spaced apart from the first magnetic component, the first magnetic component being able to move toward or away from the second magnetic component; and a rotating shaft assembly, the two ends of the rotating shaft assembly being respectively connected to the second magnetic component and the damping roller.

[0023] In the above scheme, the damper is a device that transmits constant torque using a magnetic field as a medium. There is no contact and no sliding friction between the second magnetic member and the first magnetic member. Therefore, the damper has a long service life and the tension control is very stable. The damping force of the damping roller can be adjusted by adjusting the distance between the first magnetic member and the second magnetic member.

[0024] In some embodiments, the shell assembly includes a cylindrical outer shell and a front cover and a rear cover that respectively cover both ends of the outer shell. The front cover, the outer shell and the rear cover jointly define a cavity. The first magnetic part is arranged between the second magnetic part and the front cover. The first magnetic part is connected to the rear cover. Along the axial direction of the outer shell, the rear cover can move relative to the outer shell and drive the first magnetic part to approach or move away from the second magnetic part.

[0025] In the above solution, the position of the second magnetic component in the cavity is pushed by the rear cover to change the distance between the second magnetic component and the first magnetic component, thereby adjusting the damping force of the damping roller.

[0026] In some embodiments, the back cover includes a screw-in portion and a flange portion arranged on the outer circumferential surface of the screw-in portion, the outer circumferential surface of the screw-in portion is provided with an external thread, the inner circumferential surface of the outer shell is provided with an internal thread, the outer shell is sleeved outside the screw-in portion and cooperates with the screw-in portion thread, and the flange portion cooperates with a stopper at one end of the outer shell facing away from the front cover.

[0027] In the above scheme, the position of the second magnetic part is adjusted by rotating the back cover, and the threaded cooperation between the back cover and the outer shell has a higher adjustment accuracy, so as to more accurately adjust the damping force of the damping roller and improve the matching degree between the damping force output by the damper and the actual needs.

[0028] In some embodiments, along the axial direction of the second roller, the second roller has a first end and a second end, and the damper is disposed on one side of the first end or one side of the second end.

[0029] In the above solution, the damper is arranged at the first end or the second end to reduce the probability of interference between the lateral movement of the pole piece and the damper.

[0030] In a second aspect, the present application provides a coating device, which includes a pole piece traction device according to any one of the technical solutions in the first aspect.

[0031] The coating equipment provided in the second embodiment of the present application includes the pole piece traction device in the first aspect, and therefore has the technical effects of any of the above embodiments, which will not be repeated here.

[0032] In a third aspect, the present application provides a battery production line, comprising a coating device according to an embodiment of the second aspect.

[0033] The battery production line provided by the third embodiment of the present application includes the coating equipment of the second embodiment, and therefore has the technical effects of any of the above embodiments, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without paying creative work.

[0035] Figure 1 A schematic structural diagram of a pole piece traction device from a first perspective provided in some embodiments of the present application;

[0036] Figure 2 for Figure 1 A partial enlarged schematic diagram of part A shown;

[0037] Figure 3 An exploded schematic diagram of a bracket assembly provided for some embodiments of the present application;

[0038] Figure 4 A schematic structural diagram of a pole piece traction device from a second perspective provided in some embodiments of the present application;

[0039] Figure 5 for Figure 4 A partial enlarged schematic diagram of part B is shown;

[0040] Figure 6 A schematic structural diagram of a pole piece traction device from a third perspective provided in some embodiments of the present application;

[0041] Figure 7 for Figure 6 A partial enlarged schematic diagram of part C shown (the second seat body is not shown in the figure);

[0042] Figure 8 A schematic diagram of the structure of a second roller and a pole piece provided in some embodiments of the present application;

[0043] Fig. 9 A schematic diagram of the cross-sectional structure of a damper provided in some embodiments of the present application.

[0044] In the drawings, the drawings are not drawn to scale.

[0045] The reference numerals are as follows:

[0046] 100. Pole piece traction device;

[0047] 10. First roller;

[0048] 20, second roller; 21, roller shaft; 22, roller body; 201, first end; 202, second end;

[0049] 30. damper; 31. damping roller; 311. roller body; 312. flexible member; 32. housing assembly; 321. front cover; 322. housing; 323. rear cover; 3231. screw-in portion; 3232. flange portion; 33. shaft assembly; 34. first magnetic member; 35. second magnetic member; 36. first bushing; 331. second bushing; 301. first bearing; 332. second bearing; 333. third bearing; 334. shaft stop ring; 335. shaft; 302. hysteresis body;

[0050] 40. Mounting frame;

[0051] 50, bracket assembly; 51, support; 511, first seat body; 512, second seat body; 5101, connecting hole; 52, support plate; 521, supporting portion; 5211, threaded hole; 522, sliding connecting portion; 5221, long hole; 523, mounting portion; 53, connecting member; 54, limiting member; 541, main body; 542, cap; 501, first sliding structure; 502, second sliding structure; 200, pole piece;

[0052] In the figure, the direction indicated by X is the first direction, and the direction indicated by Y is the second direction. DETAILED DESCRIPTION

[0053] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0055] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0056] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0057] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0058] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0059] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0060] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0061] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0062] Coating is an important process in the manufacturing process of lithium batteries. Pole piece coating refers to a process in which a well-stirred slurry is evenly coated on a substrate and the organic solvent in the slurry is dried. In the actual production process, the coating process includes unwinding, coating, drying, traction and winding. In the traction link of the pole piece, when the pole piece passes through the inclined roller, a lateral deviation will occur. If the lateral deviation speed is too fast, wrinkles are likely to occur. For example, when the pole piece deviates from the set position in the lateral direction during movement, the correction roller needs to be tilted so that the tension on one side of the pole piece is greater than the tension on the other side, thereby generating a lateral pulling force, and the pole piece moves laterally, thereby achieving pole piece correction. Among them, the lateral direction refers to the direction perpendicular to the movement of the pole piece.

[0063] However, in the existing equipment, the passing roller and the correcting roller are both passive rollers, and the passing roller and the correcting roller rotate under the drive of the pole piece. During the correcting process of the correcting roller, the lateral tension on the pole piece is too large, causing the pole piece to move laterally too fast in the correcting roller and causing the pole piece to wrinkle.

[0064] Based on the above considerations, the present application proposes a pole piece traction device, which arranges a damper on one side of the second roller, and makes the damping roller in the damper abut against the outer peripheral surface of the second roller. During the rotation of the second roller, the damping roller is used to apply a damping force to the second roller, thereby reducing the rotation speed of the second roller, increasing the sliding friction between the pole piece and the second roller, and using the sliding friction to offset part of the lateral pulling force, thereby reducing the speed of the lateral movement of the pole piece and reducing the probability of pole piece wrinkles.

[0065] According to the embodiments of the present application, Figure 1 and Figure 2 As shown, a pole piece traction device 100 is provided, and the pole piece traction device 100 includes: a plurality of first rollers 10, a second roller 20 and a damper 30. The plurality of first rollers 10 are arranged in parallel and spaced apart and are used to traction the pole piece 200. When the pole piece 200 needs to be corrected, the axis of the second roller 20 forms an angle with the axis of the first roller 10, so that the second roller 20 is tilted relative to the first roller 10. It should be noted that when the axis of the second roller 20 forms an angle with the axis of the first roller 10, the axis of the second roller 20 is not coplanar with the axis of at least one first roller 10, so that the tension on one side of the pole piece 200 in the lateral direction is greater than the tension on the other side, generating a lateral pulling force acting on the pole piece 200, so that the pole piece 200 generates a lateral displacement. The damper 30 is disposed on one side of the second roller 20 , and includes a damping roller 31 , which abuts against the outer circumference of the second roller 20 , and is used to apply a damping force to the second roller 20 during the rotation of the second roller 20 .

[0066] In this embodiment, the damper 30 includes but is not limited to a friction damper 30 , a fluid damper 30 and a magnetic damper 30 .

[0067] In this embodiment, the second roller 20 may be a deviation correction roller for correcting the pole piece 200 , or the second roller 20 may be a roller with an inclined axis for pulling the pole piece 200 .

[0068] In the above scheme, by arranging a damper 30 on one side of the second roller 20, and making the damping roller 31 in the damper 30 abut against the outer peripheral surface of the second roller 20, when the pole piece 200 passes through the first roller 10 and the second roller 20 in sequence and drives the first roller 10 and the second roller 20 to rotate, the damper 30 applies a damping force to the second roller 20 through the damping roller 31, thereby reducing the rotation speed of the second roller 20, so that there is a rotation speed difference between the second roller 20 and the first roller 10, and sliding friction is generated between the pole piece 200 and the outer peripheral surface of the second roller 20, and the sliding friction force is used to partially offset the lateral pulling force of the second roller 20, thereby slowing down the lateral displacement speed of the pole piece 200 and reducing the probability of wrinkling of the pole piece 200.

[0069] In some embodiments, Figure 2 and Figure 3 As shown, the pole piece traction device 100 also includes a mounting frame 40 and a bracket assembly 50. The second roller 20 includes a roller shaft 21 and a roller body 22 rotatably mounted outside the roller shaft 21. The roller shaft 21 is arranged on the mounting frame 40. The damping roller 31 is against the outer peripheral surface of the roller body 22. The bracket assembly 50 is respectively connected to the roller shaft 21 and the damper 30.

[0070] In the above scheme, the damper 30 is connected to the roller shaft 21 of the second roller 20 as a whole through the bracket assembly 50, so that the damper 30 can deflect with the deflection of the second roller 20, thereby making the damping roller 31 in the damper 30 always maintain abutment with the outer peripheral surface of the roller body 22.

[0071] In some embodiments, Figure 3 As shown, the support assembly 50 includes a support 51, a support plate 52 and a connecting member 53. The support 51 is fixedly connected to the roller shaft 21. One of the support plate 52 and the support 51 is provided with a first sliding structure 501 extending along a first direction, and the other of the two is provided with a second sliding structure 502. The second sliding structure 502 is slidably connected to the first sliding structure 501. The damper 30 is installed on the support plate 52 and is located on one side of the roller body 22 along the first direction. The first direction forms an angle with the axis of the roller shaft 21. The connecting member 53 is detachably connected to the support plate 52 and the support 51, respectively, and the connecting member 53 can fix the support plate 52 to the support 51. In this embodiment, the first direction is perpendicular to the axis of the roller shaft 21.

[0072] The support 51 includes a first seat body 511 and a second seat body 512 which are detachably connected. The first seat body 511 and the second seat body 512 are fixedly connected by bolts, etc., and the roller shaft 21 is fixedly clamped between the first seat body 511 and the second seat body 512 to achieve a fixed connection between the support 51 and the roller shaft 21.

[0073] The support plate 52 is plate-shaped, the length direction of the support plate 52 is parallel to the first direction, the thickness direction of the support plate 52 is parallel to the axis of the roller shaft 21 and perpendicular to the first direction, a mounting hole is provided on the support plate 52, the axis of the mounting hole is parallel to the axis of the roller shaft 21, the damper 30 is passed through the mounting hole and fixedly connected to the support plate 52.

[0074] The first sliding structure 501 and the second sliding structure 502 refer to two structures that can be slidably matched, such as a slide rail and a slider, a slide groove and a slider, a through hole and a slide rod slidably inserted into the through hole, etc. In this embodiment, the first sliding structure 501 and the second sliding structure 502 can adopt any of the above structural modes to define the sliding connection relationship between the support 51 and the support plate 52.

[0075] In the above solution, the support plate 52 is arranged to be slidable relative to the support 51 along the first direction, so that the support plate 52 can drive the damper 30 to move along the first direction together, and further adjust the relative position between the damping roller 31 and the second idler roller 20 along the first direction, so that the damping roller 31 can contact the second idler roller 20 after position adjustment, and a certain pressure is maintained between the damping roller 31 and the second idler roller 20. When the second idler roller 20 rotates, the damping roller 31 can apply a damping force to the second idler roller 20 more efficiently, reducing the rotation speed of the second idler roller 20. Among them, the connecting member 53 is used to fix the support plate 52 and the support 51 after adjusting their relative positions.

[0076] In some embodiments, please refer to Figure 3 、 Figure 4 and Figure 5 As shown, the support plate 52 includes a support portion 521, a sliding connection portion 522, and a mounting portion 523 that are connected in sequence. The damper 30 is mounted on the mounting portion 523. The support portion 521 and the mounting portion 523 are arranged opposite to each other along the first direction. The support 51 is located between the support portion 521 and the mounting portion 523. The support portion 521 is provided with a threaded hole 5211 extending along the first direction. The connecting member 53 is configured as a bolt. The connecting member 53 passes through the threaded hole 5211 and is in threaded cooperation with the threaded hole 5211. One end of the connecting member 53 facing the support 51 extends out of the threaded hole 5211 and abuts against the support 51.

[0077] In this embodiment, the support portion 521, the sliding connection portion 522, and the mounting portion 523 are arranged in sequence along the first direction, and the support portion 521 and the mounting portion 523 are arranged opposite to each other. The sliding connection portion 522 is located between the support portion 521 and the mounting portion 523. The support plate 52 is integrally in a "U" shape, forming a groove-shaped space for accommodating the support 51 between the support portion 521 and the mounting portion 523. The support 51 is located between the support portion 521 and the mounting portion 523. Therefore, when the support portion 521 and the support 51 are moved away from each other along the first direction by driving the connecting member 53 to rotate, the mounting portion 523 drives the damper 30 to move closer to the support 51 along the first direction, so that the damping roller 31 in the damper 30 moves in the direction close to the roller body 22.

[0078] In the above scheme, by rotating the connecting member 53, under the action of the threads of the connecting member 53 and the threaded hole 5211, the connecting member 53 can move along the first direction while rotating, so that the end of the connecting member 53 facing the support 51 can move along the first direction toward one side of the support 51. When the end of the connecting member 53 facing the support 51 extends out of the threaded hole 5211 and abuts against the support 51, continuing to drive the connecting member 53 can make the support portion 521 and the support 51 move away from each other along the first direction and the mounting portion 523 and the support 51 approach each other along the first direction, thereby making the mounting portion 523 drive the damper 30 to move along the first direction toward the side close to the second roller 20, so that the damping roller 31 is pressed against the outer peripheral surface of the roller body 22. It can be understood that if the connecting member 53 is rotated in the opposite direction, the damper 30 will move along the first direction toward the side away from the second roller 20. Therefore, the relative position of the second roller 20 and the damping roller 31 along the first direction can be adjusted by rotating the connecting member 53 to adjust the pressure between the damping roller 31 and the second roller 20.

[0079] In some embodiments, Figure 3 As shown, the first sliding structure 501 is configured as a sliding groove provided on the support 51 , and the second sliding structure 502 is configured as a sliding part that slidably cooperates with the sliding groove and is provided on the sliding connection part 522 .

[0080] In this embodiment, the slide groove is a groove with one side open, and the length direction of the slide groove is parallel to the first direction. The sliding portion is an edge contour of the sliding connection portion 522 facing the support 51, and one end of the sliding connection portion facing the support 51 is slidably arranged in the slide groove, so that the sliding direction of the support plate 52 relative to the support 51 is limited by the slide groove.

[0081] In the above solution, the cooperation between the slide groove and the sliding part is used to limit the sliding direction between the support plate 52 and the support 51, so that the support plate 52 slides on the support 51 more stably.

[0082] In some embodiments, please combine Figure 2 , Figure 3 and Figure 5 As shown, the sliding connection part 522 is provided with a long hole 5221, the length direction of the long hole 5221 is parallel to the first direction, and the long hole 5221 passes through the sliding connection part 522 along the second direction, and the second direction is perpendicular to the axis of the roller shaft 21; the bracket assembly 50 also includes at least one limit member 54, at least one limit member 54 is columnar and extends along the second direction, the limit member 54 is passed through the long hole 5221 and is connected to the support 51.

[0083] The long hole 5221 is also called an oblong hole, a waist-shaped hole, etc. The number of the limiting members 54 can be one, or two or more. When the number of the limiting members 54 is two or more, all the limiting members 54 are arranged in a row along the first direction and are arranged in sequence. In this embodiment, the number of the limiting members 54 is two.

[0084] In the above solution, the sliding fit between the limiting member 54 and the long hole 5221 can further improve the sliding stability of the support plate 52 on the support 51 .

[0085] In some embodiments, Figure 3 As shown, the limiting member 54 includes a connected main body portion 541 and a cap portion 542, the main body portion 541 is connected to the support 51, the cap portion 542 is arranged at one end of the main body portion 541 away from the support 51, the cap portion 542 is located on the side of the sliding connection portion 522 away from the support 51, and along the second direction, the cap portion 542 cooperates with the end face stopper on the side of the sliding connection portion 522 away from the support 51.

[0086] In this embodiment, the limiting member 54 is a bolt, the main body 541 of the limiting member 54 is the rod of the bolt, the cap 542 of the limiting member 54 is the head of the bolt, and a connecting hole 5101 along the second direction is provided on the support 51. One end of the bolt extends into the connecting hole 5101 and is fixedly connected to the support 51. The bolt is passed through the long hole 5221. The nut of the bolt is located on the side of the sliding connection part 522 away from the support 51, and the diameter of the nut is greater than the width of the long hole 5221, so that the support plate 52 can be limited by the nut in the second direction.

[0087] In the above solution, the cap 542 cooperates with the end face of the sliding connection part 522 that is away from the support 51 to limit the support plate 52. Under the stopping action of the cap 542, the support plate 52 will not fall off the support 51. The stopping cooperation refers to the end face of the cap 542 that is away from the support 51 abutting against each other.

[0088] In some embodiments, Figure 2 As shown, the damping roller 31 includes a roller body 311 and a flexible member 312 sleeved outside the roller body 311 , and the flexible member 312 abuts against the outer circumferential surface of the second roller 20 .

[0089] In the above scheme, the flexible member 312 is against the outer peripheral surface of the second roller 20. On the one hand, the friction between the damping roller 31 and the second roller 20 is increased, and the probability of the damping roller 31 and the second roller 20 slipping during the rotation is reduced. On the other hand, the flexible member 312 is softer than the second roller 20, which can reduce the wear of the damping roller 31 on the outer peripheral surface of the second roller 20. The flexible member 312 can be made of flexible materials such as silicone.

[0090] In some embodiments, the damper 30 further includes an adjusting mechanism, which is transmission-connected to the damping roller 31 , and is used to adjust the damping force of the damping roller 31 .

[0091] The damper 30 includes, but is not limited to, a friction damper, a pneumatic damper, an electromagnetic damper, a hydraulic damper, and a permanent magnet damper. Depending on the type of the damper 30, the adjustment mechanism has different structures. For example, in a permanent magnet damper, the adjustment mechanism has two magnets with adjustable distances to change the damping force of the damping roller 31. The adjustment mechanism in the electromagnetic damper includes an electromagnetic coil and an iron core, and the damping force of the damping roller 31 is adjusted by controlling the magnitude of the current in the electromagnetic coil.

[0092] In the above scheme, the damping force of the damping roller 31 is adjusted by the adjustment mechanism, and the damping force output by the damper 30 can be adjusted according to the size of the wrinkles after the pole piece passes through the second roller, so that the damping force output by the damper 30 matches the actual demand.

[0093] In some embodiments, Figure 6 , Figure 7 and Fig. 9 As shown, the adjustment mechanism includes a shell assembly 32, a first magnetic component 34, a second magnetic component 35, and a rotating shaft assembly 33. The shell assembly 32 is connected to the bracket assembly 50. The shell assembly 32 has a cavity. The first magnetic component 34 is arranged in the cavity. The second magnetic component 35 is rotatably arranged in the cavity and is spaced apart from the first magnetic component 34. The first magnetic component 34 can move in a direction close to or away from the second magnetic component 35. The two ends of the rotating shaft assembly 33 are respectively connected to the second magnetic component and the damping roller 31.

[0094] In this embodiment, the damper 30 is a magnetic damper 30. The housing assembly 32 includes a cylindrical shell 322 and a front cover 321 and a rear cover 323 that cover both ends of the shell 322 respectively. The front cover 321, the shell 322 and the rear cover 323 jointly define a cavity. The first magnetic member 34 and the second magnetic member 35 are arranged in the cavity at intervals, and a hysteresis body 302 is filled between the first magnetic member 34 and the second magnetic member 35. The first magnetic member 34 and the second magnetic member 35 are both magnets. When the second magnetic member 35 rotates under the drive of the damping roller 31, it can be affected by the magnetic force of the first magnetic member 34 to generate resistance, so that the damping roller 31 can apply a damping force to the second roller 20. The first magnetic member 34 is arranged between the second magnetic member 35 and the front cover. The first magnetic member 34 is connected to the rear cover. The rear cover can move relative to the shell along the axial direction of the shell and drive the first magnetic member 34 to approach or move away from the second magnetic member 35. Specifically, the rear cover includes a screw-in portion 3231 and a flange portion 3232 arranged on the outer circumference of the screw-in portion 3231, the outer circumference of the screw-in portion 3231 is provided with an external thread, the inner circumference of the shell is provided with an internal thread, the shell is sleeved outside the screw-in portion 3231 and is threadedly matched with the screw-in portion 3231, and the flange portion 3232 is matched with a stopper at one end of the shell away from the front cover. The screw-in portion 3231 is connected to the first magnetic member 34 through the first bearing 301 and the first bushing 36. By rotating the rear cover 323, the spacing between the first magnetic member 34 and the second magnetic member 35 can be changed to adjust the magnitude of the magnetic force interacting between the first magnetic member 34 and the second magnetic member 35, and then the magnitude of the damping force of the damping roller 31 acting on the second roller 20 can be adjusted. Therefore, the magnitude of the damping force output by the damper 30 can be adjusted according to the size of the wrinkles of the pole piece 200 after passing through the second roller 20, so that the magnitude of the damping force output by the damper 30 matches the actual demand.

[0095] The rotating shaft assembly 33 includes a second bushing 331 fixedly connected to the second magnetic member, a rotating shaft 335 connected to the second bushing 331, and a second bearing 332 and a third bearing 333 sleeved outside the rotating shaft 335. The outer rings of the second bearing 332 and the third bearing 333 are fixedly connected to the housing assembly 32. The rotating shaft assembly 33 also includes a shaft stop ring 334, which is sleeved outside the rotating shaft 335 and abuts against the inner ring of the third bearing 333. The damping roller 31 and the rotating shaft 335 are an integrated structure, or the damping roller 31 is fixedly connected to one end of the rotating shaft 335 extending out of the cavity.

[0096] In the above scheme, the damper 30 is a device that transmits constant torque using a magnetic field as a medium. There is no contact and no sliding friction between the second magnetic member and the first magnetic member. Therefore, the damper 30 has a long service life and the tension control is very stable.

[0097] In some embodiments, Figure 8As shown, along the axial direction of the second roller 20 , the second roller 20 has a first end 201 and a second end 202 , and the damper 30 is disposed on one side of the first end 201 or on one side of the second end 202 .

[0098] In this embodiment, the second roller 20 is a deviation correction roller, and the axis of the first roller 10 is parallel to the horizontal plane, that is, the height of the first end 201 of the second roller 20 is higher than the height of the second end 202 .

[0099] In the above solution, the damper 30 is disposed at the second end 202 to reduce the probability of interference between the lateral movement of the pole piece 200 and the damper 30 .

[0100] In a second aspect, the present application provides a coating device, which includes a pole piece traction device according to any one of the technical solutions in the first aspect.

[0101] The coating equipment provided in the second embodiment of the present application includes the pole piece traction device in the first aspect, and therefore has the technical effects of any of the above embodiments, which will not be repeated here.

[0102] In a third aspect, the present application provides a battery production line, including a coating device according to an embodiment of the second aspect. The battery production line may also include an unwinding device, a drying device, a winding device, etc.

[0103] The battery production line provided by the third embodiment of the present application includes the coating equipment of the second embodiment, and therefore has the technical effects of any of the above embodiments, which will not be repeated here.

[0104] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below.

[0105] In an embodiment of the present application, a pole piece traction device is provided. The pole piece traction device 100 includes a mounting frame, a bracket assembly, at least one first roller, at least one second roller and a damper.

[0106] Specifically, the first roller 10 is rotatably disposed on the mounting frame 40, the second roller 20 includes a roller shaft 21 and a roller body 22 rotatably mounted outside the roller shaft 21, the roller shaft 21 is disposed on the mounting frame 40, the first roller 10 is used to pull the pole piece 200, and the second roller 20 can be configured as a correction roller. When the pole piece 200 needs to be corrected, the axis of the second roller 20 forms an angle with the axis of the first roller 10, so that the second roller 20 is inclined relative to the first roller 10, so that the tension on one side of the pole piece 200 in the lateral direction is greater than the tension on the other side, thereby generating a lateral pulling force acting on the pole piece 200, causing the pole piece 200 to produce a lateral displacement.

[0107] The bracket assembly 50 is respectively connected to the roller shaft 21 and the damper 30, so that the damper 30 is arranged on one side of the second roller 20. The damper 30 includes a damping roller 31. The damping roller 31 is against the outer peripheral surface of the second roller 20. The damping roller 31 is used to apply a damping force to the second roller 20 during the rotation of the second roller 20 to reduce the rotation speed of the second roller 20, so that there is a rotation speed difference between the second roller 20 and the first roller 10, and sliding friction is generated between the pole piece 200 and the outer peripheral surface of the second roller 20, and the sliding friction force is used to partially offset the lateral pulling force of the second roller 20, thereby slowing down the lateral displacement speed of the pole piece 200 and reducing the probability of wrinkling of the pole piece 200.

[0108] Specifically, the bracket assembly 50 includes a support 51, a support plate 52 and a connecting member 53. The support 51 includes a first seat body 511 and a second seat body 512 that are detachably connected. The first seat body 511 and the second seat body 512 are fixedly connected by bolts or the like, and the roller shaft 21 is fixedly clamped between the first seat body 511 and the second seat body 512 to achieve a fixed connection between the support 51 and the roller shaft 21.

[0109] The support plate 52 is plate-shaped, and includes a supporting portion 521, a sliding connection portion 522 and a mounting portion 523 connected in sequence. The damper 30 is mounted on the mounting portion 523. The supporting portion 521 and the mounting portion 523 are arranged relatively to each other along a first direction. The support 51 is located between the supporting portion 521 and the mounting portion 523. The supporting portion 521 is provided with a threaded hole 5211 extending along the first direction. The connecting member 53 is configured as a bolt. The connecting member 53 is passed through the threaded hole 5211 and threadedly matched with the threaded hole 5211. The connecting member 53 extends toward one end of the support 51 to the outside of the threaded hole 5211 and abuts against the support 51.

[0110] The sliding connection part 522 is provided with a long hole 5221, the length direction of the long hole 5221 is parallel to the first direction, and the long hole 5221 passes through the sliding connection part 522 along the second direction, and the second direction is perpendicular to the axis of the roller shaft 21; the bracket assembly 50 also includes at least one stopper 54, at least one stopper 54 is columnar and extends along the second direction, and the stopper 54 is passed through the long hole 5221 and connected to the support 51. The stopper 54 includes a main body 541 and a cap 542 connected to each other, the main body 541 is connected to the support 51, the cap 542 is provided at one end of the main body 541 away from the support 51, the cap 542 is located on the side of the sliding connection part 522 away from the support 51, and along the second direction, the cap 542 is engaged with the end surface of the sliding connection part 522 away from the support 51.

[0111] Specifically, the limit member 54 can be used to limit the movement of the damper 30 relative to the second roller 20 along the first direction to adjust the relative position between the damping roller 31 and the second roller 20, and the connecting member 53 is used to lock the damping roller 31 so that the relative position of the damping roller 31 and the second roller 20 remains fixed.

[0112] Furthermore, the damper 30 is a magnetic damper, and the damper 30 also includes an adjusting mechanism, which includes a shell assembly 32, a first magnetic component 34, a second magnetic component 35, and a rotating shaft assembly 33. The shell assembly 32 is connected to the bracket assembly 50, and the shell assembly 32 has a cavity. The first magnetic component 34 is arranged in the cavity, and the second magnetic component 35 is rotatably arranged in the cavity and spaced apart from the first magnetic component 34. The first magnetic component 34 can move in a direction close to or away from the second magnetic component 35, and the two ends of the rotating shaft assembly 33 are respectively connected to the second magnetic component and the damping roller 31.

[0113] The housing assembly 32 includes a cylindrical shell 322 and a front cover 321 and a rear cover 323 that cover both ends of the shell 322 respectively. The front cover 321, the shell 322 and the rear cover 323 define a cavity together. The first magnetic member 34 and the second magnetic member 35 are arranged in the cavity at intervals, and a hysteresis body 302 is filled between the first magnetic member 34 and the second magnetic member 35. The first magnetic member 34 and the second magnetic member 35 are both magnets. When the second magnetic member 35 rotates under the drive of the damping roller 31, it can be affected by the magnetic force of the first magnetic member 34 to generate resistance, so that the damping roller 31 can apply a damping force to the second roller 20. The first magnetic member 34 is arranged between the second magnetic member 35 and the front cover. The first magnetic member 34 is connected to the rear cover. The rear cover can move relative to the shell along the axial direction of the shell and drive the first magnetic member 34 to approach or move away from the second magnetic member 35. Specifically, the rear cover includes a screw-in portion 3231 and a flange portion 3232 arranged on the outer circumference of the screw-in portion 3231, the outer circumference of the screw-in portion 3231 is provided with an external thread, the inner circumference of the shell is provided with an internal thread, the shell is sleeved outside the screw-in portion 3231 and is threadedly matched with the screw-in portion 3231, and the flange portion 3232 is matched with a stopper at one end of the shell away from the front cover. The screw-in portion 3231 is connected to the first magnetic member 34 through the first bearing 301 and the first bushing 36. By rotating the rear cover 323, the spacing between the first magnetic member 34 and the second magnetic member 35 can be changed to adjust the magnitude of the magnetic force interacting between the first magnetic member 34 and the second magnetic member 35, and then the magnitude of the damping force of the damping roller 31 acting on the second roller 20 can be adjusted. Therefore, the magnitude of the damping force output by the damper 30 can be adjusted according to the size of the wrinkles of the pole piece 200 after passing through the second roller 20, so that the magnitude of the damping force output by the damper 30 matches the actual demand.

[0114] The rotating shaft assembly 33 includes a second bushing 331 fixedly connected to the second magnetic member, a rotating shaft 335 connected to the second bushing 331, and a second bearing 332 and a third bearing 333 sleeved outside the rotating shaft 335. The outer rings of the second bearing 332 and the third bearing 333 are fixedly connected to the housing assembly 32. The rotating shaft assembly 33 also includes a shaft stop ring 334, which is sleeved outside the rotating shaft 335 and abuts against the inner ring of the third bearing 333. The damping roller 31 and the rotating shaft 335 are an integrated structure, or the damping roller 31 is fixedly connected to one end of the rotating shaft 335 extending out of the cavity.

[0115] The pole piece pulling device proposed in the present invention also has the following beneficial effects:

[0116] 1. The damper is a device that transmits constant torque using magnetic field as a medium. The second magnetic part does not contact the first magnetic part, and there is no sliding friction, so it has a long service life and extremely stable tension control.

[0117] 2. The rotating parts are made of light and strong materials with precision processing, and the moment of inertia is very small.

[0118] 3. All metal parts have been treated with rust prevention and have excellent corrosion resistance.

[0119] 4. The installation structure is simple and the damping size is easy to adjust; the design is compact and the size is small, and it can work stably in various coating positions.

[0120] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, but these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A pole piece pulling device, characterized in that: The pole piece traction device comprises: A plurality of first rollers, which are arranged in parallel and spaced apart and are used for pulling the pole piece; A second roller, wherein the axis of the second roller can be arranged parallel to or at an angle with the axis of the first roller, and when the axis of the second roller is at an angle with the axis of the first roller, the axis of the second roller is not coplanar with the axis of at least one of the first rollers; The damper is arranged at one side of the second roller, and the damper includes a damping roller, the damping roller is against the outer peripheral surface of the second roller, and the damping roller is used to apply a damping force to the second roller during the rotation of the second roller.

2. The pole piece pulling device according to claim 1, characterized in that: The pole piece traction device also includes a mounting frame and a bracket assembly. The second roller includes a roller shaft and a roller body rotatably mounted outside the roller shaft. The roller shaft is arranged on the mounting frame. The damping roller is against the outer peripheral surface of the roller body. The bracket assembly is respectively connected to the roller shaft and the damper.

3. The pole piece pulling device according to claim 2, characterized in that: The bracket assembly comprises: A support, fixedly connected to the roller shaft; A support plate, one of the support plate and the support is provided with a first sliding structure, and the other of the two is provided with a second sliding structure, the second sliding structure can be slidably connected to the first sliding structure along a first direction, the damper is installed on the support plate and is located on one side of the roller body along the first direction, and the first direction is set at an angle with the axis of the roller shaft.

4. The pole piece pulling device according to claim 3, characterized in that: The support plate includes a supporting portion, a sliding connection portion and a mounting portion which are connected in sequence, the damper is mounted on the mounting portion, the supporting portion and the mounting portion are arranged relatively to each other along the first direction, the support is located between the supporting portion and the mounting portion, the supporting portion is provided with a threaded hole extending along the first direction, the bracket assembly also includes a connecting piece, the connecting piece is passed through the threaded hole and threadably matched with the threaded hole, and one end of the connecting piece facing the support abuts against the support.

5. The pole piece pulling device according to claim 4, characterized in that: The first sliding structure is configured as a sliding groove, and the second sliding structure is configured as a sliding part that slides with the sliding groove.

6. The pole piece pulling device according to claim 4, characterized in that: The sliding connection portion is provided with a long hole, the length direction of the long hole is parallel to the first direction, and the long hole passes through the sliding connection portion along a second direction, and the second direction is perpendicular to the axis of the roller shaft; The bracket assembly further includes at least one limiting member, which is columnar and extends along the second direction. The limiting member is inserted into the long hole and connected to the support.

7. The pole piece pulling device according to claim 6, characterized in that: The limiting member includes a main body and a cap portion connected to the support, the main body is connected to the support, the cap is located on the side of the sliding connection portion away from the support, and along the second direction, the cap cooperates with the end face stopper on the side of the sliding connection portion away from the support.

8. The pole piece pulling device according to claim 2, characterized in that: The damping roller comprises a roller body and a flexible member sleeved outside the roller body, and the flexible member abuts against the outer peripheral surface of the second roller.

9. The pole piece pulling device according to any one of claims 2 to 8, characterized in that: The damper also includes an adjusting mechanism, which is transmission-connected to the damping roller and is used to adjust the damping force of the damping roller.

10. The pole piece pulling device according to claim 9, characterized in that: The regulating mechanism comprises: A shell assembly connected to the bracket assembly, wherein the shell assembly has a cavity; A first magnetic member is movably disposed in the cavity; A second magnetic member is rotatably disposed in the cavity and spaced apart from the first magnetic member, and the first magnetic member can move toward or away from the second magnetic member; A rotating shaft assembly, two ends of which are respectively connected to the second magnetic member and the damping roller.

11. The pole piece pulling device according to claim 10, characterized in that: The shell assembly includes a cylindrical outer shell and a front cover and a rear cover respectively covering both ends of the outer shell, the front cover, the outer shell and the rear cover jointly define the containing cavity, the first magnetic part is arranged between the second magnetic part and the front cover, the first magnetic part is connected to the rear cover, and along the axial direction of the outer shell, the rear cover can move relative to the outer shell and drive the first magnetic part to approach or move away from the second magnetic part.

12. The pole piece pulling device according to claim 11, characterized in that: The rear cover includes a screw-in portion and a flange portion arranged on the outer circumference of the screw-in portion, the outer circumference of the screw-in portion is provided with an external thread, the inner circumference of the outer shell is provided with an internal thread, the outer shell is sleeved outside the screw-in portion and cooperates with the screw-in portion thread, and the flange portion cooperates with an end stop of the outer shell away from the front cover.

13. The pole piece pulling device according to any one of claims 1 to 8, characterized in that: Along the axial direction of the second roller, the second roller has a first end and a second end, and the damper is arranged on one side of the first end or one side of the second end.

14. A coating device, characterized in that: It comprises a pole piece pulling device according to any one of claims 1 to 13.

15. A battery production line, characterized in that: Comprising a coating apparatus according to claim 14.

Images