Winding system, rolling equipment and battery production system

Abstract

The invention provides a winding system, rolling equipment and a battery production system, and belongs to the field of battery manufacturing. The winding system comprises a roll changing mechanism, an upper winding drum and a lower winding drum, wherein the upper winding drum and the lower winding drum can rotate around the axis of the upper winding drum and the lower winding drum and are oppositely arranged at intervals in the vertical direction. The roll changing mechanism comprises a passing roller, a cutting device and a movable pressing roller which are sequentially arranged in the conveying direction of a strip. The movable pressing roller is located between the upper winding drum and the lower winding drum and can move relative to the passing roller so that the strip can be wound on one of the upper winding drum and the lower winding drum. When a material roll wound by one of the upper winding drum and the lower winding drum reaches a preset winding diameter, the cutting device cuts off the strip, and the movable compression roller is used for driving the strip to be wound on the other one of the upper winding drum and the lower winding drum; and when the strip is cut off, the movable compression roller is tangent to the material coil. According to the winding system, when the strip is cut off in the working process, the movable pressing roller abuts against the strip, so that the phenomenon of wrinkling of an overhanging section generated after the strip is cut can be relieved or even eliminated, and the reliability of reel changing and winding operation can be improved.

Description

Technical Field

[0001] The present application relates to the field of battery manufacturing technology, and in particular to a winding system, a rolling device and a battery production system. Background Art

[0002] The current battery production process usually includes the following steps: slurry preparation - coating - rolling - die cutting - winding or lamination - shelling - liquid injection, etc. In the coating, rolling, die cutting and other processes, the battery film materials are supplied in the form of rolls, and after each process is completed, the corresponding rolls are obtained by winding, so that they can be easily transferred to the next process.

[0003] In order to improve production efficiency, the upper winding drum winds the strip to a full roll and then cuts the strip, and then drives the strip to the lower winding drum for winding, so that continuous winding can be achieved without stopping the machine. How to improve the reliability of the roll changing and winding operation is a problem worthy of attention. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems existing in the background technology. To this end, one purpose of the present application is to provide a winding system, a rolling device and a battery production system, which can effectively improve the reliability of the roll changing and winding operation.

[0005] The embodiment of the first aspect of the present application provides a winding system for winding a strip material, comprising: a roll-changing mechanism and an upper winding drum and a lower winding drum which can rotate around their own axes and are arranged opposite to each other and spaced apart in the vertical direction, the roll-changing mechanism comprises a passing roller, a cutting device and a movable pressing roller which are arranged in sequence along the conveying direction of the strip material; the movable pressing roller is located between the upper winding drum and the lower winding drum; the movable pressing roller is configured to be able to move relative to the passing roller so as to press the head end of the strip material against the upper winding drum and the lower winding drum from one side of the strip material The strip is wound around one of the upper and lower winding drums; the cutting device is configured to cut the strip when the roll wound by one of the upper and lower winding drums reaches a preset roll diameter, and the movable pressure roller then moves to the other side of the strip to drive the strip to be wound around the other of the upper and lower winding drums; and in the process of the upper and lower winding drums rotating to wind the strip into a roll and the cutting device cutting the strip, the movable pressure roller remains tangent to the roll.

[0006] In the technical solution of the embodiment of the present application, by introducing a movable pressure roller, the movable pressure roller can move from one side of the strip to the other side of the strip, so as to drive the strip to be alternately wound on the upper winding drum and the lower winding drum to achieve continuous winding. And when the strip is cut, the movable pressure roller remains against the outer peripheral surface of the material roll. In this way, the non-free end of the overhanging section generated when the strip is cut is pressed by the movable pressure roller, which not only slows down the speed of the overhanging section sagging, but also reduces the possibility of uneven tension distribution caused by the sudden drop of the overhanging section and the drastic change of tension, and the tendency of the non-free end to droop downward is blocked, so that the wrinkling phenomenon of the overhanging section can be reduced or even eliminated. The position accuracy of the tail end of the material roll can be effectively improved, so as to facilitate the subsequent accurate identification of the tail end and smooth gluing operation, thereby improving the reliability of the roll changing and winding operation.

[0007] In some embodiments, the roll-changing mechanism is configured to be able to be raised and lowered, and the roll-changing mechanism has an upper winding station, a lower winding station and an intermediate station, and the intermediate station is located between the upper winding station and the lower winding station; at the upper winding station, the vertical distance between the passing roller and the upper winding drum in the vertical direction is smaller than the vertical distance between the passing roller and the lower winding drum in the vertical direction, and the movable pressure roller is used to drive the strip to be wound on the upper winding drum; at the lower winding station, the vertical distance between the passing roller and the upper winding drum in the vertical direction is larger than the vertical distance between the passing roller and the lower winding drum in the vertical direction, and the movable pressure roller is used to drive the strip to be wound on the lower winding drum.

[0008] In this embodiment, the lifting of the roll changing mechanism can drive the movable pressing roller to approach the upper receiving drum or the lower receiving drum, so the movement stroke of the movable pressing roller can be effectively shortened and the working space can be reduced, which is beneficial to improving the movement accuracy of the movable pressing roller.

[0009] In some embodiments, the roll-changing mechanism further includes a frame and a first actuator, wherein the first actuator, the roller, the cutting device and the movable pressure roller are all arranged on the frame; the first actuator is connected to the frame through a first transmission mechanism to drive the frame to rise and fall; wherein the first transmission mechanism includes a first fixed rack and a first rotating gear; the first fixed rack extends in a vertical direction; the first rotating gear is connected to the frame and can rotate around its own axis relative to the frame under the driving action of the first actuator; the first fixed rack and the first rotating gear are meshed and transmitted, so that the first rotating gear can roll in a vertical direction relative to the first fixed rack. The first rotating gear requires a smaller movable space, which is conducive to the compactness of the roll-changing mechanism.

[0010] In some embodiments, the winding system also includes a first linear rail assembly, the first linear rail assembly includes a first fixed guide rail and a first slider, the first fixed guide rail extends in a vertical direction, the first slider is connected to the frame, and the first slider is slidably connected to the first fixed guide rail.

[0011] This embodiment enables the first linear rail assembly to provide a stable movement path for the roll-changing mechanism to rise and fall, thereby reducing the possibility of shaking or deflection when the roll-changing mechanism rises and falls, and making the roll-changing mechanism move more smoothly.

[0012] In some embodiments, the cutting device is configured so that the cut surface formed by cutting the strip is a plane, and the cut surface is perpendicular to two surfaces of the strip that are arranged opposite to each other along its thickness direction.

[0013] Compared with cutters of irregular shapes such as sawtooth shapes, the cutting device in this embodiment cuts the strip to form a flat cutting port, which has a positive effect on the image recognition unit to accurately identify the cutting point (i.e. the tail end), and can further have a favorable effect on improving the reliability of the roll changing and winding operations.

[0014] In some embodiments, the cutting device includes a second actuator, a flat cutter and a second linear rail assembly. The thickness direction of the flat cutter and the thickness direction of the strip are perpendicular to the axial direction of the roller. The second actuator is connected to the flat cutter through a second transmission mechanism to drive the flat cutter to reciprocate along the axial direction of the roller. The second linear rail assembly includes a second fixed guide rail and a second slider that slides with the second fixed guide rail. The extension direction of the second fixed guide rail is parallel to the axial direction of the roller. The second slider is connected to the flat cutter.

[0015] The strip is cut by a flat cutter. As a mechanical cutting tool, the flat cutter has the effect of low manufacturing and maintenance costs compared to wire cutting equipment and laser cutting equipment.

[0016] In some embodiments, the second transmission mechanism is a belt transmission mechanism, which includes a driving wheel, a driven wheel and a conveyor belt, and the conveyor belt is tensioned on the driving wheel and the driven wheel; the axial direction of the driving wheel is perpendicular to the extension direction of the second fixed guide rail, and the conveyor belt is arranged on the outer periphery of the second linear rail assembly; the flat cutter and the second slider are both connected to the conveyor belt, and the second slider and the flat cutter are located on the same side of the second fixed guide rail.

[0017] With the help of the guiding function and supporting function of the second linear rail assembly, the movement stability of the conveyor belt can be improved, which can help to make the flat cutter move smoothly and stably, so that the cutting quality can be effectively guaranteed.

[0018] In some embodiments, when the material roll wound by one of the upper winding drum and the lower winding drum reaches a preset roll diameter, the vertical distance between the center of the movable pressing roller and the cutting device along the conveying direction of the strip is greater than or equal to 180 mm and less than or equal to 220 mm.

[0019] This embodiment reduces the vertical distance between the cutting station and the center of the movable pressure roller against the material roll of the preset roll diameter, so that the length of the overhanging section produced can be as small as possible, and the weight of the overhanging section will be reduced accordingly, which can have a positive effect on reducing the wrinkling phenomenon of the overhanging section.

[0020] In some embodiments, the roll changing mechanism also includes a rocker arm, one end of which is arranged on the central axis and the other end is connected to the movable pressure roller, and the rocker arm can rotate forward or reverse with the central axis; the movable pressure roller is arranged to adaptively adjust its position relative to the material roll as the strip is wound, and can drive the rocker arm to adaptively rotate.

[0021] The structure of the mechanism for realizing the swinging motion of the movable pressure roller is relatively compact, and the required motion range space is smaller.

[0022] In some embodiments, the roll changing mechanism also includes a clamping roller that can be raised and lowered relative to the passing roller, the clamping roller is arranged opposite and parallel to the passing roller, and the clamping roller and the passing roller are respectively located on both sides of the strip; the clamping roller is configured to move vertically to abut against the strip when the material roll wound by one of the upper winding drum and the lower winding drum reaches a preset winding diameter; the cutting device is configured to cut the strip when the material roll wound by one of the upper winding drum and the lower winding drum reaches a preset winding diameter and the clamping roller and the passing roller jointly clamp the strip.

[0023] By designing a liftable clamping roller, the strip tension can be controlled by adjusting the position of the clamping roller, so that the position of the clamping roller can be flexibly adjusted according to the winding process, so that the clamping roller does not contact the strip when the material roll does not reach the preset winding diameter, and the risk of strip wear is smaller. When the material roll reaches the preset winding diameter, the clamping roller and the passing roller jointly clamp the strip before cutting the strip, which is conducive to improving the cutting accuracy and cutting effect.

[0024] In some embodiments, the clamping roller is configured to be able to rotate forward or reverse around its own axis; when the cutting device cuts the strip, the clamping roller rotates to drive the strip to be transported in the opposite direction of the conveying direction, so that the head end of the strip can be withdrawn between the clamping roller and the passing roller.

[0025] This embodiment enables the clamping roller to rotate forward or reverse. After the strip is cut, the clamping roller can be used to drive the head end of the strip to retreat between the clamping roller and the passing roller to prepare for the next roll change and winding.

[0026] In some embodiments, the roll-changing mechanism also includes a traction mechanism, which is located downstream of the cutting device along the conveying direction of the strip; the traction mechanism can reciprocate and translate along a preset horizontal direction, and the preset horizontal direction is perpendicular to the axial direction of the roller; when the cutting device cuts the strip, the movable pressure roller moves to the other side of the strip, and the traction mechanism moves along the preset horizontal direction to pull the head end of the strip between the upper winding drum and the lower winding drum.

[0027] The traction mechanism is used to provide traction force for the strip after the strip is cut, so that the strip can continue to be transported to be wound up. Compared with the technical method of manually pulling the strip between the upper winding drum and the lower winding drum, this embodiment can reduce manual intervention.

[0028] In some embodiments, the traction mechanism includes a parallel clamp and a flexible clamp connected to each other, and two clamping fingers of the parallel clamp can be opened and closed in the vertical direction, so that the flexible clamp can clamp the head end of the strip or release the head end of the strip.

[0029] In this embodiment, the traction mechanism adopts a flexible clamp to clamp the strip, which is beneficial to reduce the risk of strip wear due to the flexible nature of the flexible clamp.

[0030] In some embodiments, the roll changing mechanism also includes a frame and a third linear rail assembly, the third linear rail assembly includes a third fixed guide rail and a third slider slidably matched with the third fixed guide rail, the third fixed guide rail extends along a preset horizontal direction and is fixedly arranged on the frame, and the traction mechanism is connected to the third slider.

[0031] This embodiment enables the third linear rail assembly to provide a stable motion path for the reciprocating translation of the traction mechanism, so as to reduce the possibility of shaking or deviation during the translation of the traction mechanism, thereby making the movement of the traction mechanism more stable.

[0032] In some embodiments, the roll-changing mechanism also includes a sliding rod, which is parallel to the roller; the number of upper winding drums, lower winding drums and traction mechanisms is the same and there are multiple of them; multiple upper winding drums are coaxially arranged and spaced apart along the extension direction of their own axes, and multiple lower winding drums are coaxially arranged and spaced apart along the extension direction of their own axes; multiple traction mechanisms are all arranged on the sliding rod, and the traction mechanisms can slide along the sliding rod.

[0033] In this embodiment, there are multiple upper winding drums and lower winding drums, and the multiple upper winding drums can reel in the material at the same time. After the material roll reeled by each upper winding drum reaches the preset reel diameter, it can be switched to multiple lower winding drums for reeling in the material at the same time, which can greatly improve the reeling efficiency and production efficiency.

[0034] An embodiment of the second aspect of the present application provides a rolling device, which includes two rollers arranged opposite to each other and the winding system in the above embodiment.

[0035] An embodiment of the third aspect of the present application provides a battery production system, which includes the winding system in the above embodiment, or, it includes the rolling equipment in the above embodiment.

[0036] 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application.

[0038] Figure 1 It is a schematic diagram of the principles of some roll changing mechanisms in the related art; Figure 2 This is a schematic diagram of the structure of the roll changing mechanism in some embodiments of the present application; Figure 3 A schematic diagram of a process of winding a strip material by an upper winding drum of a winding system according to some embodiments of the present application; Figure 4 A schematic diagram of a process of winding a strip by a lower winding drum of a winding system according to some embodiments of the present application; Figure 5 This is a schematic diagram of the structure of the winding system of some embodiments of the present application when the material roll on the upper winding drum reaches a preset winding diameter; Figure 6 This is a schematic diagram of the structure of the winding system of some embodiments of the present application, in which the head end of the strip is pulled to the top of the lower winding drum; Figure 7 This is a schematic diagram of the structure of a winding system in some embodiments of the present application where a movable pressure roller presses a strip material onto a lower winding drum; Figure 8 This is a schematic diagram of the structure of the winding system of some embodiments of the present application when the material roll of the lower winding drum reaches a preset winding diameter; Fig. 9 A schematic diagram of the structure of a cutting device of a winding system in some embodiments of the present application; Fig.10 for Fig. 9 A partial enlarged schematic diagram of point E in the middle; Fig.11 This is a schematic diagram of the cooperation between the traction mechanism and the strip of the winding system in some embodiments of the present application.

[0039] Description of reference numerals: Strip 1000, coil 1100; Roll changing mechanism 100, roller 110, cutting device 120, second actuator 121, flat cutter 122, second linear rail assembly 123, second fixed guide rail 1231, second slider 1232, conveyor belt 124, mounting seat 125, movable pressure roller 130, swing rod 131, driver 132, central axis 133, third transmission mechanism 134, frame 140, slide bar 141, first transmission mechanism 142, first fixed rack 142 1, first rotating gear 1422, second fixed rack 143, optical axis 144, mounting plate 145, first actuator 150, first linear rail assembly 160, first fixed guide rail 161, first slider 162, third linear rail assembly 170, third fixed guide rail 171, third slider 172, clamping roller 180, traction mechanism 190, parallel clamp 191, flexible clamp 192, third actuator 193, sliding mounting block 194; Take-up reel 200; Lower take-up drum 300; Image recognition unit 400. DETAILED DESCRIPTION

[0040] The following embodiments of the technical solution of the present application will be 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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).

[0046] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which 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.

[0047] 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 integrated 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; it can be the internal connection of two elements or the interaction relationship between two elements.

[0048] The term "parallel" in this application includes not only the absolutely parallel situation, but also the roughly parallel situation conventionally recognized in engineering; at the same time, "vertical" also includes not only the absolutely vertical situation, but also the roughly vertical situation conventionally recognized in engineering. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of this application can be understood according to specific circumstances.

[0049] At present, in the battery production process, when the strip 1000 is wound to a full roll, manual participation is generally required to complete the winding and roll change and winding. That is, the winding process of the strip 1000 and the roll change and winding operation are semi-automatic. Specifically, the operator operates the equipment to stop, manually triggers the cutting device to cut the strip 1000, and then operates the roll to continue rotating in the winding direction so that the tail end of the roll is wound, and then performs the gluing operation to stick the tape on the tail end (i.e. the cut-off point) of the full roll so that the tail end is fixed, and the complete winding action is completed; then the strip 1000 is operated to switch to the empty winding drum for winding, and a new winding process is performed, and then the full roll is unloaded.

[0050] In order to further improve the winding efficiency and production efficiency, the winding process of the strip 1000 and the roll changing and winding operation can be designed to be fully automated. Specifically, when the strip 1000 is wound to a full roll, Figure 1 As shown, the cutting device automatically cuts off the strip 1000, and the material roll continues to rotate in the winding direction to roll the tail end into the material roll. Then, when the image recognition unit recognizes the tail end of the material roll, the gluing mechanism is controlled to automatically glue the tail end to complete the winding, and then the automatic roll changing and winding operation is performed.

[0051] With this design, Figure 1 As shown, if two winding drums that take turns to reel in the material are arranged in the vertical direction, in the actual production process, when the roll 1100 wound by the lower one of the two winding drums is about to be fully wound, the cutting device 120 then cuts the tape, thereby generating a hanging section. The hanging section refers to the part that has not been wound and will naturally fall under the action of gravity (i.e., the part between the point A where the tape 1000 is cut and the outer peripheral surface of the formed roll 1100 is cut and the cutting point B). The two ends of the hanging section are the free end and the non-free end, respectively. The free end is the cutting point. After the tape is cut, when the roll 1100 continues to be wound, the non-free end is wound before the free end. The hanging section falls naturally under the action of gravity. The part close to the bottom is subjected to more vertical tension, while the part close to the top is relatively less tensile. This tension difference makes it easy for the hanging section to have uneven tension distribution during the falling process, resulting in the tension in the middle of the hanging section being tightened and the edge being loose, which easily causes wrinkles. Wrinkling of the overhanging section will cause the position of the tail end of the material roll 1100 to be inaccurate, which will easily cause the image recognition unit 400 to be unable to detect and identify the tail end, resulting in the subsequent gluing operation being unable to proceed smoothly, the winding being unable to be completed, and seriously affecting the roll changing and winding operations.

[0052] In addition, it is also understandable that the hanging section (i.e., section AB) has a large randomness in falling, and it may fall to the side of the roll 1100 close to the cutting device 120, or it may fall to the side of the roll 1100 away from the cutting device 120. When the hanging section falls to a different side of the roll 1100 from the side where the image recognition unit 400 is located, the image recognition unit 400 cannot detect and recognize the tail end during the process of winding the hanging section, which will cause the glue application to fail, the winding cannot be completed, and seriously affect the roll changing and winding operations.

[0053] Based on the above considerations, in order to improve the reliability of the reel-changing and reeling operation, a reeling system is designed, and a movable pressure roller is introduced. The movable pressure roller is designed to move from one side of the strip 1000 to the other side of the strip 1000, so as to drive the strip 1000 to be alternately reeled on the upper reel and the lower reel to achieve continuous reeling, and the movable pressure roller remains against the outer peripheral surface of the reel when the material reel reaches the preset reel diameter. In such a reeling system, the strip 1000 is cut after the reel wound by the upper reel and the lower reel reaches the preset reel diameter. At this time, the non-free end of the overhanging section generated is pressed by the movable pressure roller, which can reduce or even eliminate the wrinkles caused by the sagging of the overhanging section. This can effectively improve the position accuracy of the tail end of the material reel, so as to facilitate the subsequent accurate identification of the tail end and smooth gluing operation, thereby improving the reliability of the reel-changing and reeling operation.

[0054] The winding system involved in the embodiment of the present application can be applied to various processes that require winding the strip 1000, such as a coating process, a rolling process, a die-cutting process, etc. In other words, the winding system involved in the embodiment of the present application can be used in a coating device for implementing a coating process, and accordingly, the strip 1000 wound by the winding system is a pole piece, which includes a current collector and an active material arranged on at least one surface; or, the winding system involved in the embodiment of the present application can also be used in a rolling device for implementing a rolling process, and accordingly, the strip 1000 wound by the winding system is a pole piece after rolling, and the rolling device also includes two rollers arranged oppositely; or, the winding system involved in the embodiment of the present application can also be used in a die-cutting device for implementing a die-cutting process, and accordingly, the strip 1000 wound by the winding system is a pole piece after die-cutting.

[0055] In other scenarios, a battery production system may also be formed using a winding system, coating equipment, rolling equipment, die-cutting equipment, etc., as described in this application. For the sake of clarity, the following embodiments are all described using the winding system applied to a rolling equipment as an example.

[0056] See also Figure 2 and Figure 3The embodiment of the present application provides a winding system for winding a strip material 1000, which includes: an upper winding drum 200, a lower winding drum 300 and a roll changing mechanism 100. The upper winding drum 200 and the lower winding drum 300 are arranged opposite to each other and spaced apart in the vertical direction, and both the upper winding drum 200 and the lower winding drum 300 can rotate around their own axes. The roll changing mechanism 100 includes a roller 110, a cutting device 120 and a movable pressure roller 130 arranged in sequence along the conveying direction of the strip material 1000, and the movable pressure roller 130 is located between the upper winding drum 200 and the lower winding drum 300.

[0057] The movable pressure roller 130 is configured to be able to move relative to the passing roller 110 so as to press the head end of the strip 1000 against one of the upper winding drum 200 and the lower winding drum 300 from one side of the strip 1000, so that the strip 1000 is wound on one of the upper winding drum 200 and the lower winding drum 300; the cutting device 120 is configured to cut the strip 1000 when the roll 1100 wound on one of the upper winding drum 200 and the lower winding drum 300 reaches a preset winding diameter, and the movable pressure roller 130 then moves to the other side of the strip 1000 to drive the strip 1000 to be wound on the other of the upper winding drum 200 and the lower winding drum 300. Furthermore, during the process that the upper winding drum 200 or the lower winding drum 300 rotates to wind the strip 1000 into the material roll 1100 and the cutting device 120 cuts the strip 1000 , the movable pressing roller 130 remains tangent to the material roll 1100 .

[0058] Among them, the strip 1000 is different according to the different application processes of the winding system. For example, it can be a pole piece that has been coated in a coating process, a pole piece that has been cold pressed in a rolling process, or a pole piece that has been die-cut in a die-cutting process.

[0059] The upper winding drum 200 and the lower winding drum 300 are both arranged on a rotating shaft, and the rotating shaft, the passing roller 110 and the movable pressure roller 130 are all parallel and extend horizontally. The rotating shaft is configured to be rotatable so that the upper winding drum 200 and the lower winding drum 300 can rotate around their own axes. The rotating shaft can be implemented as any one of a slip shaft and an air shaft, which is not limited in this embodiment. Along the transmission path, the strip 1000 passes around the passing roller 110, and the passing roller 110 can specifically be a rubber roller.

[0060] Under the premise that no interference or conflict occurs, the preset roll diameter is set as the maximum allowable roll diameter, and when the material roll 1100 reaches the preset roll diameter, it can be determined to be in a full roll state.

[0061] Assuming that the upper winding drum 200 and the lower winding drum 300 are both empty drums in the initial state of the winding system, an exemplary working process of the winding system of this embodiment is as follows: The upper winding drum 200 is wound. S11, as Figure 3As shown in A, the movable pressure roller 130 is controlled to move to a position closer to the lower winding drum 300 than the roller 110, and the head end of the strip 1000 is pulled between the upper winding drum 200 and the lower winding drum 300, and the head end of the strip 1000 is located above the movable pressure roller 130, that is, the movable pressure roller 130 is located at the lower side of the strip 1000. S12, the movable pressure roller 130 moves to approach the upper winding drum 200 until the movable pressure roller 130 abuts against the strip 1000 from the lower side of the strip 1000; the movable pressure roller 130 continues to move to drive the strip 1000 to move until the head end of the strip 1000 abuts against the upper winding drum 200, as shown in FIG. Figure 3 As shown in B. S13, the upper winding drum 200 rotates to roll the strip 1000 into a roll 1100; as the upper winding drum 200 rolls, the roll diameter of the roll 1100 gradually increases, and during this process, the movable pressing roller 130 moves with the rotation of the upper winding drum 200, and the movable pressing roller 130 always abuts against the outer peripheral surface of the roll 1100 to maintain tangency with the roll 1100, as shown in FIG. Figure 3 As shown in C; until the material roll 1100 reaches the preset roll diameter, it means that the material roll 1100 reaches the full roll state, such as Figure 3 Middle D and Figure 5 As shown. S14, the cutting device 120 cuts the strip 1000. S15, the upper winding drum 200 continues to rotate so that the overhanging section (in Figure 3 The D portion in the middle is shown as NM segment) and is wound up on the upper winding drum 200. S16, the tail end of the material roll 1100 is glued and a new empty roll is used to replace the upper winding drum 200 loaded with a full roll.

[0062] The lower winding drum 300 is wound. S21, as Figure 4 Middle B and Figure 6 As shown, the movable pressing roller 130 is controlled to move to a position closer to the upper winding drum 200 than the roller 110, so that the movable pressing roller 130 is switched to the upper side of the strip 1000, and then the head end of the strip 1000 is pulled between the upper winding drum 200 and the lower winding drum 300. S22, the movable pressing roller 130 moves to approach the lower winding drum 300 until the movable pressing roller 130 abuts against the strip 1000 from the upper side of the strip 1000; the movable pressing roller 130 continues to move to drive the strip 1000 to move until the head end of the strip 1000 abuts against the lower winding drum 300, as shown in FIG. Figure 4 Middle C and Figure 7 S23, the lower winding drum 300 rotates to wind the strip 1000 into a roll 1100; as the lower winding drum 300 winds, the roll diameter of the roll 1100 gradually increases, and during this process, the movable pressing roller 130 moves with the rotation of the lower winding drum 300, and the movable pressing roller 130 always abuts against the outer peripheral surface of the roll 1100 to maintain tangency with the roll 1100, as shown in FIG. Figure 4As shown in D; until the material roll 1100 reaches the preset roll diameter, it means that the material roll 1100 is full, such as Figure 8 S24, the cutting device 120 cuts the strip 1000. S25, the lower winding drum 300 continues to rotate at a certain angle so that the generated overhanging section is wound on the upper winding drum 200. S26, the tail end of the material roll 1100 is glued.

[0063] Return to the winding step of the upper winding drum 200, so that the upper winding drum 200 and the lower winding drum 300 are wound in turn.

[0064] The winding system of this embodiment introduces a movable pressure roller 130, and the movable pressure roller 130 is designed to be able to move from one side of the strip 1000 to the other side of the strip 1000, so as to drive the strip 1000 to be alternately wound on the upper winding drum 200 and the lower winding drum 300 to achieve continuous winding, thereby improving the efficiency of winding changes during the winding process.

[0065] In addition, the movable pressing roller 130 can move with the upper winding drum 200 and the lower winding drum 300 to keep tangent to the material roll 1100 until the material roll 1100 reaches the preset winding diameter, so that the movable pressing roller 130 remains tangent to the material roll 1100, and then the strip 1000 is cut by the cutting device 120. In other words, when the strip 1000 is cut, the movable pressing roller 130 keeps against the outer peripheral surface of the material roll 1100. In this way, the wrinkling phenomenon of the hanging section can be reduced or even eliminated, because the non-free end of the hanging section is pressed by the movable pressing roller 130, which not only slows down the speed of the hanging section, but also reduces the possibility of uneven tension distribution caused by the sudden drop of the hanging section due to the drastic change of tension, and because the non-free end is pressed, the tendency of the non-free end to fall downward is blocked, which can reduce the degree of the hanging section, and reduce or even eliminate the phenomenon of wrinkles in the hanging section due to gravity. Thereby, the position accuracy of the tail end of the material roll 1100 can be effectively improved, so as to facilitate the subsequent accurate identification of the tail end and smooth gluing operation, thereby improving the reliability of the roll changing and winding operation.

[0066] Moreover, compared with Figure 1 In the related technology shown in the figure, in this embodiment, the active pressure roller 130 presses against the strip 1000 when cutting the strip 1000. Under the blocking effect of the active pressure roller 130, the overhanging section can accurately fall to the side of the material roll 1100 close to the cutting device 120, reducing the randomness of the overhanging section's falling direction. In other words, the overhanging section's falling direction is determined, so that the image recognition unit can effectively identify the tail end, which is conducive to the subsequent glue application operation to proceed smoothly, so that the strip 1000 can be smoothly rolled, further improving the reliability of the roll changing and winding operation.

[0067] According to some optional embodiments of the present application, the roll-changing mechanism 100 is configured to be liftable, and the roll-changing mechanism 100 has an upper winding station, a lower winding station and an intermediate station, and the intermediate station is located between the upper winding station and the lower winding station. At the upper winding station, the vertical distance between the over roller 110 and the upper winding drum 200 in the vertical direction is smaller than the vertical distance between the over roller 110 and the lower winding drum 300 in the vertical direction, and the movable pressure roller 130 is used to drive the strip 1000 to be wound on the upper winding drum 200. At the lower winding station, the vertical distance between the over roller 110 and the upper winding drum 200 in the vertical direction is larger than the vertical distance between the over roller 110 and the lower winding drum 300 in the vertical direction, and the movable pressure roller 130 is used to drive the strip 1000 to be wound on the lower winding drum 300.

[0068] Set the rewinding system to the middle position in the initial state. Please continue to refer to Figure 2 and Figure 3 In the working process of the winding system in this example, when executing the winding step of the upper winding drum 200, step S10 can be executed before step S11; and step S17 can be executed after step S16.

[0069] S10, switching the winding system from the middle station to the upper winding station. S17, switching the winding system from the upper winding station to the middle station.

[0070] At the same time, when the winding step of the lower winding drum 300 is executed, step S20 may be executed before step S21 ; and step S27 may be executed after step S26 .

[0071] S20, switching the winding system from the middle station to the lower winding station. S27, switching the winding system from the lower winding station to the middle station.

[0072] The middle station is equivalent to the reset position of the roll changing system. When the upper winding drum 200 or the lower winding drum 300 is full, the winding system can be returned to the reset position to prepare for the next winding.

[0073] This embodiment enables the roll-changing mechanism 100 to be raised and lowered to switch between the upper winding station, the middle station and the lower winding station, so that the movement stroke of the active pressure roller 130 from the lower side of the strip 1000 to drive the strip 1000 against the upper winding drum 200 can be shortened at the upper winding station. Similarly, the movement stroke of the active pressure roller 130 from the upper side of the strip 1000 to drive the strip 1000 against the lower winding drum 300 can also be shortened at the lower winding station. In general, the lifting and lowering of the roll-changing mechanism 100 can drive the active pressure roller 130 to approach the upper winding drum or the lower winding drum, so that the movement stroke of the active pressure roller 130 can be effectively shortened and the working space can be reduced, which is conducive to improving the movement accuracy of the active pressure roller 130.

[0074] It should be noted that when the winding system is running for a long time, the position of the roll-changing mechanism 100 may produce a slight error due to mechanical wear, offset and other factors. In this embodiment, the roll-changing mechanism 100 returns to the middle station for resetting after completing one winding of the upper winding drum 200 or one winding of the lower winding drum 300, which is conducive to recalibrating the position and preventing the generation of cumulative errors. In addition, this design also helps to reduce the complexity of the control program of the winding system, so as to facilitate the operation stability of the winding system.

[0075] In order to enable the roll changing mechanism 100 to be lifted and lowered, Figure 2 , Figures 5 to 8 As shown, the roll changing mechanism 100 may also be designed to specifically include a frame 140 and a first actuator 150. The first actuator 150, the roller 110, the cutting device 120 and the movable pressing roller 130 are all arranged on the frame 140. The frame 140 provides an installation base for the first actuator 150, the roller 110, the cutting device 120 and the movable pressing roller 130. The first actuator 150 is connected to the frame 140 through a first transmission mechanism 142 to drive the frame 140 to rise and fall, thereby causing the roller 110, the cutting device 120 and the movable pressing roller 130 arranged on the frame 140 to rise and fall accordingly.

[0076] The frame 140 may specifically include two substrates which are parallel to each other and spaced apart along the axial direction of the roller 110 , and the roller 110 and the movable pressing roller 130 are arranged between the two substrates.

[0077] The first actuator 150 may be a linear actuator, such as a linear motor, a cylinder, a hydraulic cylinder, etc. Alternatively, the first actuator 150 may also be a rotary actuator, such as a stepper motor, a servo motor, etc. In this example, the first transmission mechanism 142 can be used to convert the rotary power provided by the rotary actuator into a linear power, and any one of a worm gear mechanism, a screw nut mechanism, a rack and pinion mechanism, a chain transmission mechanism, a belt transmission mechanism, etc. may be used to implement the first transmission mechanism 142.

[0078] According to some embodiments of the present application, in the solution where the first actuator 150 is a rotary actuator, please continue to refer to Figure 2 , Figure 5 , Figure 6 and Figure 8 The first transmission mechanism 142 may specifically include a first fixed rack 1421 and a first rotating gear 1422. The first fixed rack 1421 extends in the vertical direction, and the first rotating gear 1422 is connected to the frame 140 and can rotate around its own axis relative to the frame 140 under the driving action of the first actuator 150. The first fixed rack 1421 and the first rotating gear 1422 are meshed and transmitted, so that the first rotating gear 1422 can roll in the vertical direction relative to the first fixed rack 1421.

[0079] Since the first rotating gear 1422 is installed on the frame 140 , the first rotating gear 1422 can be regarded as a component unit of the roll changing mechanism 100 .

[0080] When the winding system of this example is working, the first actuator 150 drives the first rotating gear 1422 to rotate. Since the first fixed rack 1421 is fixed, the first rotating gear 1422 meshing with the first fixed rack 1421 can also move, thereby causing the first rotating gear 1422 to roll in the vertical direction, thereby driving the frame 140 and the first actuator 150, the roller 110, the cutting device 120 and the movable pressure roller 130 arranged on the frame 140 to move in the vertical direction.

[0081] This embodiment uses a gear rack mechanism as the first transmission mechanism 142, which has the advantages of high motion accuracy and a large travel range. In addition, by making the first fixed rack 1421 fixed and the first rotating gear 1422 both rotatable and movable, the activity space required by the first rotating gear 1422 is smaller than the activity space required by the movable rack, which is conducive to the compactness of the roll changing mechanism 100 and easier travel control.

[0082] According to some embodiments of this application, please continue to refer to Figure 2 , Figure 5 , Figure 6 and Figure 8 The winding system may further include a first linear rail assembly 160. The first linear rail assembly 160 includes a first fixed rail 161 and a first slider 162. The first fixed rail 161 extends in a vertical direction. The first slider 162 is connected to the frame 140. The first slider 162 is slidably connected to the first fixed rail 161.

[0083] Among them, Figure 2 In the embodiment, two first linear rail assemblies 160 are provided, two first sliders 162 belonging to different first linear rail assemblies 160 are fixedly connected to two substrates respectively, two first fixed guide rails 161 belonging to different first linear rail assemblies 160 are parallel to each other and arranged at intervals, and the two substrates are located between the two first fixed guide rails 161. Of course, in other embodiments, the number of first linear rail assemblies 160 can also be 1 or 3 or more.

[0084] It is understandable that since the first slider 162 is installed on the frame 140 , the first slider 162 can be regarded as a component unit of the roll changing mechanism 100 , that is, the first slider 162 can move in the up and down directions along with the frame 140 and slide along the first fixed guide rail 161 at the same time.

[0085] In this embodiment, the first linear rail assembly 160 can provide a stable movement path for the roll changing mechanism 100 to rise and fall, so as to reduce the possibility of shaking or deflection of the roll changing mechanism 100 when it rises and falls, so that the roll changing mechanism 100 moves more smoothly, and the risk of local wear caused by the deflection of the roll changing mechanism 100 can also be reduced. The first linear rail assembly 160 can also share part of the pressure, thereby helping to reduce the wear of the roll changing mechanism 100.

[0086] According to some embodiments of the present application, the cutting device 120 may be configured to make the cut surface formed by cutting the strip 1000 a plane, and the cut surface is perpendicular to two surfaces of the strip 1000 that are arranged opposite to each other along its thickness direction.

[0087] That is, the cutting device 120 of this example cuts the strip 1000 along a straight direction parallel to the axial direction of the roller 110. The cutting device 120 may be implemented by using wire cutting technology, laser cutting technology, etc.

[0088] Compared with cutters of irregular shapes such as sawtooth shapes, the cutting device 120 of this embodiment cuts the strip 1000 to form a flat cut port, that is, the cut end is flat, which has a positive effect on the image recognition unit to accurately identify the cut end (that is, the tail end), and further has a favorable effect on improving the reliability of the roll changing and winding operations.

[0089] According to some embodiments of this application, please refer to Figure 2 , Figures 5 to 10 The cutting device 120 may specifically include a second actuator 121, a flat cutter 122, and a second linear rail assembly 123. The thickness direction of the flat cutter 122 and the thickness direction of the strip 1000 are perpendicular to the axial direction of the roller 110. The second actuator 121 is connected to the flat cutter 122 through a second transmission mechanism to drive the flat cutter 122 to reciprocate along the axial direction of the roller 110. Fig. 9 and Fig.10 As shown, the second linear rail assembly 123 includes a second fixed guide rail 1231 and a second slider 1232 slidably matched with the second fixed guide rail 1231 . The extension direction of the second fixed guide rail 1231 is parallel to the axial direction of the roller 110 , and the second slider 1232 is connected to the flat cutter 122 .

[0090] For ease of understanding, in the various drawings of the present application, the axial direction of the roller 110 and the thickness direction of the flat cutter 122 are respectively shown as the X-axis and the Y-axis, and the X-axis and the Y-axis are perpendicular to each other.

[0091] In the initial state of the winding system of this embodiment, the flat cutter 122 may be located near one of the substrates, that is, the flat cutter 122 is away from the transmission path of the strip 1000. When S14 and S24 are executed, the flat cutter 122 is controlled by the second actuator 121 to move close to the strip 1000 to cut the strip 1000. After executing S14 and S24, the flat cutter 122 may be located at the position in the initial state, or may be moved to a position close to another substrate under the control of the second actuator 121.

[0092] The cutting device 120 is designed to include a flat cutter 122, and the flat cutter 122 is used to cut the strip 1000. The flat cutter 122 is used as a mechanical cutting tool, and has the effect of low manufacturing and maintenance costs compared to wire cutting equipment and laser cutting equipment. In addition, this embodiment enables the second linear rail assembly 123 to provide a stable movement path for the flat cutter 122 to reciprocate along the axial direction of the roller 110, so as to reduce the possibility of shaking or offset when the flat cutter 122 moves, so that the flat cutter 122 moves more smoothly, so that the strip 1000 can be reliably cut, and the cutting quality can be effectively guaranteed.

[0093] Similar to the first actuator 150, the second actuator 121 may be a rotary actuator. In this example, the second transmission mechanism can be used to convert the rotary power provided by the rotary actuator into a linear power. The second transmission mechanism may be a 90° steering reducer, and any one of a worm gear mechanism, a screw nut mechanism, a rack and pinion mechanism, a chain transmission mechanism, a belt transmission mechanism, etc. may be used to implement the second transmission mechanism. Alternatively, the second actuator 121 may also be a linear actuator.

[0094] According to some embodiments of the present application, the second transmission mechanism may be implemented by a belt transmission mechanism. Figure 2 , Figures 5 to 10 In this example, the second transmission mechanism includes a driving wheel, a driven wheel and a conveyor belt 124, and the conveyor belt 124 is stretched on the driving wheel and the driven wheel. The axial direction of the driving wheel is perpendicular to the extension direction of the second fixed guide rail 1231, and the conveyor belt 124 is arranged around the outer periphery of the second linear rail assembly 123. The flat cutter 122 and the second slider 1232 are both connected to the conveyor belt 124, and the second slider 1232 and the flat cutter 122 are located on the same side of the second fixed guide rail 1231.

[0095] The material of the conveyor belt 124 can be a flexible material such as rubber, polyvinyl chloride, or a metal material such as steel. The axis of the driving wheel is parallel to the axis of the driven wheel. Figures 5 to 8As shown, the axes of the two can be perpendicular to the X-axis and the Y-axis, that is, the axis of the driving wheel and the axis of the driven wheel extend in the vertical direction, and accordingly, the flat cutter 122 is arranged on the conveyor belt 124, and the flat cutter 122 is located on one side of the second fixed guide rail 1231 along the Y-axis direction. In other embodiments not shown in the figure, the axis of the driving wheel and the axis of the driven wheel can also be parallel to the Y-axis, and accordingly, the flat cutter 122 is arranged on the conveyor belt 124, and the flat cutter 122 is located on one side of the second fixed guide rail 1231 along the Z-axis direction, that is, the flat cutter 122 can be located on the lower side of the second fixed guide rail 1231.

[0096] The gravity of the flat cutter 122 connected to the conveyor belt 124 acts on the conveyor belt 124, which may easily cause the conveyor belt 124 to tip over, fall, etc. In this embodiment, the conveyor belt 124 is also connected to the second slider 1232 of the second linear rail assembly 123. On the one hand, the second slider 1232 can provide support for the conveyor belt 124, which can reduce the risk of the conveyor belt 124 falling. On the other hand, the second slider 1232 can provide guidance for the conveyor belt 124 to guide the conveyor belt 124 to move along a predetermined trajectory, which can reduce the possibility of tipping over, twisting, and turning over of the conveyor belt 124. In general, with the help of the guiding function and supporting function of the second linear rail assembly 123, the movement stability of the conveyor belt 124 can be improved, which can help to make the flat cutter 122 move smoothly and stably, so that the cutting quality can be effectively guaranteed.

[0097] According to some embodiments of the present application, the roll changing mechanism 100 may also be configured such that a vertical distance L between the cutting device 120 and the center of the movable pressing roller 130 abutting against the material roll 1100 of a preset roll diameter satisfies: 180 mm ≤ L ≤ 220 mm.

[0098] That is to say, when the winding system of this embodiment is in operation, if the material roll 1100 reaches the preset winding diameter during the winding process of the upper winding drum 200, such as Figure 3 Middle D and Figure 5 As shown, the vertical distance L between the center of the flat cutter 122 and the movable pressure roller 130 is greater than or equal to 180 mm and less than or equal to 220 mm. Figure 8 As shown, the vertical distance L between the center of the flat cutter 122 and the movable pressing roller 130 is also greater than or equal to 180 mm and less than or equal to 220 mm.

[0099] The value of L may be any one of 180 mm, 190 mm, 200 mm, 210 mm and 220 mm.

[0100] This embodiment makes the vertical distance between the cutting station and the center of the active pressure roller 130 that presses against the material roll 1100 of the preset winding diameter smaller, so that the length between the cut point (i.e., the tail end of the material roll 1100) and the active pressure roller 130 pressing against the material roll 1100 is smaller, that is, the length of the tail end is smaller, so that the length of the overhanging section generated can be as small as possible, and the weight of the overhanging section will be reduced accordingly, which can have a positive effect on reducing the wrinkling phenomenon of the overhanging section.

[0101] In the winding system disclosed herein, the movable pressing roller 130 can be configured to move in the vertical direction to switch between the upper side of the strip 1000 and the lower side of the strip 1000, that is, to switch between driving the strip 1000 to be wound on the upper winding drum 200 and winding on the lower winding drum 300. Alternatively, please refer to Figure 2 , Figures 5 to 8 The movable pressing roller 130 can also be configured to swing to switch between driving the strip 1000 to be wound on the upper winding drum 200 and to be wound on the lower winding drum 300.

[0102] According to some embodiments of the present application, in an embodiment in which the movable pressure roller 130 swings, the roll changing mechanism 100 may further include a swing rod 131, one end of the swing rod 131 is disposed on the central axis 133, and the other end is connected to the movable pressure roller 130, and the swing rod 131 can rotate forward or reversely with the central axis 133. The movable pressure roller 130 is configured to perform adaptive position adjustment relative to the material roll 1100 as the strip 1000 is wound, and can drive the swing rod 131 to rotate adaptively.

[0103] Among them, the winding system may also include a driver 132, and the driver 132 is connected to the central shaft 133 through a third transmission mechanism 134, so as to drive the central shaft 133 to rotate forward or reversely, thereby driving the swing rod 131 and the movable pressure roller 130 connected to the swing rod 131 to swing back and forth. Forward rotation refers to the clockwise rotation of the central shaft 133 around its own center, and conversely, reverse rotation refers to the counterclockwise rotation of the central shaft 133 around its own center. The driver 132 can be implemented as a stepping motor, a servo motor, etc. The driver 132 is used to provide rotational power, and the third transmission mechanism 134 can be a gear transmission mechanism, a chain transmission mechanism, etc. Among them, the chain transmission mechanism can be suitable for power transmission over a longer distance. When a chain transmission mechanism is used as the third transmission mechanism 134, such as Figure 5 As shown, the driver 132 may be disposed close to the first fixed rack 1421 to facilitate compactness.

[0104] exist Figure 3 In the process of winding the strip 1000, the upper winding drum 200 rotates counterclockwise to increase the diameter of the roll 1100, and the movable pressing roller 130 moves accordingly, and the swing rod 131 rotates forward to adjust adaptively. Figure 4In the process of winding the strip 1000, the lower winding drum 300 rotates clockwise, and as the diameter of the material roll 1100 increases, the movable pressing roller 130 moves accordingly, and the swing rod 131 rotates in the opposite direction for adaptive adjustment.

[0105] Compared with the movement of the movable pressure roller 130 in the vertical direction, the mechanism structure for realizing the swinging movement of the movable pressure roller 130 is relatively compact, and the required movement range space is smaller. Moreover, by designing that the movable pressure roller 130 can adaptively adjust its position during the winding process of the strip 1000 and drive the swing rod 131 to adaptively rotate, it is ensured that the movable pressure roller 130 can maintain contact with the outer peripheral surface of the material roll 1100 during the winding process of the strip 1000, so that the movable pressure roller 130 can provide a stable and uniform pressure to the material roll 1100 during the winding process of the strip 1000, reduce the possibility of uneven pressure on the material roll 1100 due to the change of the winding diameter, so that the material roll 1100 will not be too loose or too tight, which is helpful to improve the quality of the material roll 1100, and can reduce the problem of intermittent winding caused by uneven pressure, which is conducive to improving the winding efficiency.

[0106] According to some embodiments of this application, please continue to refer to Figure 3 and Figure 4 The roll changing mechanism 100 may further include a clamping roller 180 that can be raised and lowered relative to the over-roller 110. The clamping roller 180 is arranged opposite to and parallel to the over-roller 110. The clamping roller 180 and the over-roller 110 are respectively located on both sides of the strip 1000. The clamping roller 180 is configured to move vertically to abut against the strip 1000 when the roll 1100 wound by one of the upper winding drum 200 and the lower winding drum 300 reaches a preset winding diameter. In addition, the cutting device 120 is configured to cut the strip 1000 when the roll 1100 wound by one of the upper winding drum 200 and the lower winding drum 300 reaches a preset winding diameter and the clamping roller 180 and the over-roller 110 jointly clamp the strip 1000.

[0107] The two ends of the clamping roller 180 are connected to the two substrates respectively, that is, the clamping roller 180 is installed on the frame 140, so the clamping roller 180 can be regarded as a component unit of the roll changing mechanism 100, so that it can be raised and lowered with the frame 140. And the clamping roller 180 can move up and down independently relative to the substrate.

[0108] During the operation of the winding system of this embodiment, the clamping roller 180 is not in contact with the strip 1000 in the initial state. When the winding step of the upper winding drum 200 is executed, step S18 can also be executed after S13 and before S14.

[0109] S18, controlling the clamping roller 180 to move to abut against the strip 1000, so that the clamping roller 180 and the passing roller 110 clamp the strip 1000 together.

[0110] When executing the winding step of the lower winding drum 300, before S22, the clamping roller 180 can also be controlled to return to a position where it does not contact the strip 1000, and after S23 and before S24, step S28 can also be executed.

[0111] S28, controlling the clamping roller 180 to move to abut against the strip 1000, so that the clamping roller 180 and the passing roller 110 clamp the strip 1000 together.

[0112] By designing a clamping roller 180 that can be raised and lowered, the tension of the strip 1000 can be controlled by adjusting the position of the clamping roller 180. Specifically, during the winding process of the strip 1000, when the material roll 1100 has not reached the preset winding diameter, the clamping roller 180 and the strip 1000 are not in contact, that is, the clamping roller 180 and the roller 110 do not clamp the strip 1000 together, so that the tension on the strip 1000 during the winding process is small, and friction is generated between the strip 1000 and the pressure roller during this process, the risk of wear of the strip 1000 is smaller, and the strip 1000 can be freely wound to the upper winding drum 200 or the lower winding drum 300. When the material roll 1100 reaches the preset roll diameter, the clamping roller 180 can be moved to clamp the strip 1000 together with the passing roller 110 before cutting the strip 1000. This not only allows the strip 1000 to remain tensioned when being cut, which is beneficial to improving the cutting accuracy and the cutting effect, but also allows the strip 1000 to be clamped after being cut, thereby reducing the possibility of the material head end formed after cutting naturally falling, so that the material head end can be smoothly pulled again between the upper winding drum 200 and the lower winding drum 300 for winding and changing.

[0113] According to some embodiments of the present application, the clamping roller 180 may be further configured to be able to rotate forwardly or reversely around its own axis.

[0114] That is, in this example, the clamping roller 180 can not only move up and down independently relative to the substrate, but also rotate independently relative to the substrate. During the operation of the winding system of this embodiment, after S13 and before S14, step S18 can be executed; and after S14, S19 can also be executed.

[0115] S19, controlling the clamping roller 180 to rotate around its own axis to drive the strip 1000 to be transported in the opposite direction of the conveying direction, so that the head end of the strip 1000 can be withdrawn to between the clamping roller 180 and the passing roller 110.

[0116] exist Figure 4 As shown in A, the pinch roller can rotate in the reverse direction, so that the head end of the strip 1000 retreats to between the clamping roller 180 and the passing roller 110 to prepare for reel change and rewinding.

[0117] The specific implementation process of S21 can be as follows: control the movable pressure roller 130 to move to a position closer to the upper winding drum 200 than the roller 110, so that the movable pressure roller 130 switches to the upper side of the strip 1000; then control the clamping roller 180 to rotate around its own axis to drive the strip 1000 to be transported in the conveying direction; then pull the head end of the strip 1000 to between the upper winding drum 200 and the lower winding drum 300. Figure 4 As shown in A, the clamping roller 180 can rotate in the positive direction to convey the strip 1000 forward.

[0118] This embodiment enables the clamping roller 180 to rotate forward or reverse. After cutting the strip 1000, the clamping roller 180 can be used to drive the head end of the strip 1000 to retreat between the clamping roller 180 and the passing roller 110 to prepare for the next roll change and winding, and the clamping roller 180 can be used to drive the head end of the strip 1000 to be transported forward.

[0119] According to some embodiments of this application, please combine Figures 2 to 8 ,as well as Fig.11 The roll changing mechanism 100 may further include a traction mechanism 190, which is located downstream of the cutting device 120 along the conveying direction of the strip 1000. The traction mechanism 190 can reciprocate and translate along a preset horizontal direction, which is perpendicular to the axial direction of the roller 110, and the preset horizontal direction is the Y axis. When the cutting device 120 cuts the strip 1000, the movable pressing roller 130 moves to the other side of the strip 1000, and the traction mechanism 190 moves along the preset horizontal direction to pull the head end of the strip 1000 between the upper winding drum 200 and the lower winding drum 300.

[0120] The traction mechanism 190 may also be regarded as a component unit of the roll changing mechanism 100 , that is, the traction mechanism 190 can move along the up and down directions with the frame 140 .

[0121] When the winding system of this embodiment is in operation, the specific implementation process of the above step S21 may be: control the movable pressure roller 130 to move to a position closer to the upper winding drum 200 than the passing roller 110, so that the movable pressure roller 130 switches to the upper side of the strip 1000; then control the traction mechanism 190 to translate along the conveying direction of the strip 1000 to approach the passing roller 110, until it reaches the material head end position of the strip 1000 and clamps the material head end of the strip 1000; then control the traction mechanism 190 to translate along the conveying direction of the strip 1000 to move away from the passing roller 110, and pull the material head end of the strip 1000 to between the upper winding drum 200 and the lower winding drum 300.

[0122] The traction mechanism 190 is used to provide traction force for the strip 1000 after the strip 1000 is cut, so that the strip 1000 can continue to be transported to be wound. Compared with the technical method of manually pulling the strip 1000 between the upper winding drum 200 and the lower winding drum 300, this embodiment can reduce manual intervention, improve production efficiency and the degree of automation of winding and changing rolls.

[0123] There are various implementations of the traction mechanism 190. As an example, the traction mechanism 190 may include two traction rollers arranged opposite to each other in a vertical direction, the two traction rollers can be moved closer to each other to clamp the material head end or can be moved away from each other to release the material head end, and the two traction rollers can rotate around their own axes to drive the strip 1000 to move.

[0124] According to some embodiments of this application, please combine Figures 5 to 8 ,as well as Fig.11 The traction mechanism 190 can also be specifically configured to include a parallel clamp 191 and a flexible clamp 192 connected to each other. The two clamping fingers of the parallel clamp 191 can be opened and closed in the vertical direction, so that the flexible clamp 192 can clamp the head end of the strip 1000 or release the head end of the strip 1000.

[0125] Among them, according to different power sources, the parallel clamp 191 can be any one of pneumatic parallel clamps, electric parallel clamps and hydraulic parallel clamps. The flexible clamp 192 can specifically include two flexible plates arranged opposite to each other, and the two flexible plates are connected to the two clamping fingers of the parallel clamp 191 in a one-to-one correspondence so as to move closer to or farther from each other as the two clamping fingers move. The material of the flexible clamp 192 can be any one or more of rubber, polyimide (PI), polyethylene terephthalate (PET), etc.

[0126] In this embodiment, the traction mechanism 190 adopts a flexible clamp 192 to clamp the strip 1000. Thanks to the flexible nature of the flexible clamp 192, the friction between the traction mechanism 190 and the strip 1000 is reduced when the traction mechanism 190 pulls the strip 1000, which helps to reduce the risk of wear of the strip 1000.

[0127] As an alternative example, please refer to Figure 2 , Figures 5 to 8 The roll-changing mechanism 100 can also be configured to include a slide bar 141, the slide bar 141 is parallel to the roller 110, the traction mechanism 190 is arranged on the slide bar 141, and the traction mechanism 190 can slide along the slide bar 141. In this way, the slide bar 141 provides installation and support for the traction mechanism 190, and enables the traction mechanism 190 to move along the X-axis direction. Based on this, when the winding system of this embodiment is working, the position of the traction mechanism 190 can be adjusted by sliding the traction mechanism 190 along the slide bar 141, so that the traction mechanism 190 can accurately and reliably clamp the head end of the strip 1000.

[0128] Among them, the traction mechanism 190 can also include a sliding mounting block 194, which is sleeved on the sliding rod 141 and can slide along the sliding rod 141. The end of the parallel clamp 191 away from the flexible clamp 192 is fixedly connected to the sliding mounting block 194 so that it can slide with the sliding mounting block 194.

[0129] The number of the slide bars 141 may be, but is not limited to, 1, and may also be 2, 3, etc., that is, there may be multiple slide bars 141. Figures 5 to 8 As shown, there are two slide bars 141, the two slide bars 141 are parallel to each other, and the sliding mounting block 194 is simultaneously sleeved on the two slide bars 141. It can be understood that the two slide bars 141 can be arranged at intervals along the up-down direction, or can be arranged at intervals along the Y-axis direction.

[0130] According to some embodiments of the present application, the number of the upper winding drum 200, the lower winding drum 300 and the traction mechanism 190 is the same and can be multiple. The multiple upper winding drums 200 are coaxially arranged and spaced along the extension direction of their own axes, the multiple lower winding drums 300 are coaxially arranged and spaced along the extension direction of their own axes, and the multiple traction mechanisms 190 are all arranged on the slide bar 141.

[0131] exist Figure 2 , Figures 5 to 8 In the embodiment, there are two traction mechanisms 190, two upper winding drums 200 and two lower winding drums 300, and each traction mechanism 190 can correspondingly pull a strip 1000 between an upper winding drum 200 and a lower winding drum 300. In an embodiment not shown in the figure, the number of traction mechanisms 190 can also be 3, 4 or more.

[0132] In this embodiment, there are multiple upper winding drums 200 and lower winding drums 300, so that multiple upper winding drums 200 can be wound at the same time. After the material roll 1100 wound by each upper winding drum 200 reaches the preset winding diameter, it can be switched to multiple lower winding drums 300 for winding at the same time, which can greatly improve the winding efficiency and production efficiency. On this basis, by designing multiple traction mechanisms 190, a strip 1000 can be placed between each upper winding drum 200 and a lower winding drum 300 opposite to it.

[0133] In order to enable the traction mechanism 190 to move along the preset horizontal direction Y axis, the traction mechanism 190 may also include two mounting plates 145, the two ends of the slide rod 141 are respectively connected to the two mounting plates 145, and the two mounting plates 145 are respectively movably connected to the two base plates of the frame 140.

[0134] There are various ways to implement the mounting plate 145 to move relative to the frame 140 along the Y-axis direction. Figure 2 , Figures 5 to 8 As shown, the traction mechanism 190 may also include an optical axis 144 and a third actuator 193, the two ends of the optical axis 144 are respectively connected to the two mounting plates 145, the third actuator 193 is fixedly arranged on the optical axis 144, and the third actuator 193 is transmission-connected to the mounting plate 145 through a fourth transmission mechanism, so as to drive the mounting plate 145 to move. Among them, the fourth transmission mechanism can be implemented to include a second fixed rack 143 and a second rotating gear (not shown in the figure), the second fixed rack 143 extends along the Y-axis direction and is fixedly installed on the base plate, and the first rotating gear 1422 is connected to the mounting plate 145 and can rotate relative to the mounting plate 145 under the driving action of the third actuator 193. The second fixed rack 143 and the second rotating gear are meshed and transmitted, so that the second rotating gear can roll relative to the second fixed rack 143 along the Y-axis direction. In this example, the second rotating gear requires a small space for movement, which is conducive to the compactness of the roll-changing mechanism 100 and is easier to control the stroke. Furthermore, in this example, the third actuator 193 can move along the Y-axis direction accordingly.

[0135] Of course, in other embodiments of the present application, the third actuator 193 can also be set to any one of a linear motor, a cylinder, and a hydraulic cylinder, and the third actuator 193 is fixedly installed on the frame 140 to drive the traction mechanism 190 to move.

[0136] According to some embodiments of this application, please continue to refer to Figure 2 , Figures 5 to 8 The roll changing mechanism 100 can also be configured to include a frame 140 and a third linear rail assembly 170. The third linear rail assembly 170 includes a third fixed guide rail 171 and a third slider 172 slidably matched with the third fixed guide rail 171. The third fixed guide rail 171 extends along a preset horizontal direction Y axis and is fixedly arranged on the frame 140. The traction mechanism 190 is connected to the third slider 172.

[0137] The number of the third linear rail assembly 170 may be, but is not limited to, 1, 2, 3, etc. The third sliding block 172 may be connected to the mounting plate 145 .

[0138] This embodiment enables the third linear rail assembly 170 to provide a stable movement path for the reciprocating movement of the traction mechanism 190, so as to reduce the possibility of shaking or deviation of the traction mechanism 190 during translation, so that the traction mechanism 190 moves more smoothly, which can also reduce the risk of local wear caused by the deviation of the traction mechanism 190.

[0139] 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.

[0140] In a specific embodiment of the present application, Figure 2 , Figures 5 to 11 As shown, the present application proposes a winding system for winding a strip material 1000 , the winding system comprising an upper winding drum 200 and a lower winding drum 300 rotatable around their own axes, and a roll changing mechanism 100 .

[0141] There are two upper winding drums 200 and two lower winding drums 300, the two upper winding drums 200 are coaxial and spaced along the X-axis, the two lower winding drums 300 are coaxial and spaced along the X-axis, and each upper winding drum 200 and a lower winding drum 300 are opposite to each other and spaced in the vertical direction. The axes of the upper winding drum 200 and the lower winding drum 300 extend horizontally, and the extending direction is shown as the X-axis.

[0142] The roll changing mechanism 100 includes a frame 140, and a roller 110, a clamping roller 180, a cutting device 120, a swing rod 131, a movable pressure roller 130 and a traction mechanism 190 arranged on the frame 140. The frame 140 includes two base plates which are parallel to each other and spaced apart along the axial direction X axis of the roller 110. The roller 110, the cutting device 120 and the movable pressure roller 130 are arranged in sequence along the conveying direction of the strip 1000.

[0143] A first actuator 150 is installed on the frame 140, and the frame 140 is also provided with a first rotating gear 1422. The first rotating gear 1422 can rotate around its own axis relative to the frame 140 under the driving action of the first actuator 150. The first rotating gear 1422 is meshed with a first fixed rack 1421 for transmission, so that the first rotating gear 1422 can roll in a vertical direction relative to the first fixed rack 1421, thereby enabling the roll changing mechanism 100 to have an upper winding station, a lower winding station and an intermediate station, and the intermediate station is between the upper winding station and the lower winding station.

[0144] The cutting device 120 includes two mounting seats 125, a second actuator 121, a flat cutter 122 and a belt transmission mechanism. The driving wheel and the driven wheel of the belt transmission mechanism are respectively arranged on the two mounting seats 125. The two mounting seats 125 are respectively connected to the two base plates. The axes of the driving wheel and the driven wheel are perpendicular to the X-axis and the Y-axis. The second actuator 121 is used to drive the driving wheel to rotate. The conveyor belt 124 is tightened on the driving wheel and the driven wheel. The flat cutter 122 is connected to the conveyor belt 124.

[0145] One end of the swing rod 131 is arranged on the central axis 133, and the other end is connected to the movable pressure roller 130. The central axis 133 is parallel to the roller 110. The central axis 133 is connected to the driver 132 through a chain transmission mechanism. The driver 132 is used to drive the central axis 133 to rotate forward or reversely, thereby driving the swing rod 131 and the movable pressure roller 130 connected to the swing rod 131 to swing back and forth. The driver 132 is also fixedly arranged on the base plate. The movable pressure roller 130 performs adaptive position adjustment relative to the material roll 1100 during the winding process of the strip 1000, and can drive the swing rod 131 to rotate adaptively.

[0146] The clamping roller 180 is located below the over roller 110 and is parallel to the over roller 110. The clamping roller 180 and the over roller 110 are respectively located on both sides of the strip 1000. The clamping roller 180 is mounted on the frame 140, and the clamping roller 180 can move up and down independently relative to the frame 140 and can rotate independently relative to the frame 140.

[0147] The traction mechanism 190 includes a sliding mounting block 194, a parallel clamp 191 fixedly connected to the sliding mounting block 194, and a flexible clamp 192 connected to the parallel clamp 191. The two clamping fingers of the parallel clamp 191 can be opened and closed in the vertical direction to drive the flexible clamp 192 to clamp the head end of the strip 1000 or release the head end of the strip 1000. The sliding mounting block 194 is slidably sleeved on two slide bars 141, and the two ends of the slide bars 141 are respectively connected to two mounting plates 145. The two mounting plates 145 are respectively connected to the two base plates of the frame 140 and can move relative to the frame 140 along the Y-axis direction. The traction mechanism 190 is provided with two. Among them, a second fixed rack 143 is fixedly arranged on each of the two base plates, and the second fixed rack 143 extends along the Y-axis direction. The two mounting plates 145 are each provided with a second rotating gear, and the second rotating gear can rotate around its own axis relative to the mounting plate 145 under the drive of the third actuator 193. The second rotating gear is meshed with the second fixed rack 143 for transmission, so that the second rotating gear can roll along the Y-axis direction relative to the second fixed rack 143. The third actuator 193 is a cylinder, and the cylinder is fixedly arranged on the optical axis 144 extending along the X-axis direction. The two ends of the optical axis 144 are respectively connected to the two mounting plates 145, and the cylinder is connected to the second rotating gear through a 90° steering reducer.

[0148] Furthermore, the winding system also includes a first linear rail assembly 160, which includes a first fixed guide rail 161 and a first slider 162. The first fixed guide rail 161 extends in a vertical direction, the first slider 162 is fixedly connected to the base plate, and the first slider 162 is slidably connected to the first fixed guide rail 161.

[0149] Furthermore, the cutting device 120 also includes a second linear rail assembly 123, which includes a second fixed guide rail 1231 and a second slider 1232 slidably matched with the second fixed guide rail 1231, the second fixed guide rail 1231 extends along the X-axis direction, the two ends of the second fixed guide rail 1231 are respectively connected to two mounting seats 125, the second slider 1232 is connected to the conveyor belt 124, and the second slider 1232 and the flat cutter 122 are located on the same side of the second fixed guide rail 1231.

[0150] Furthermore, the roll changing mechanism 100 also includes two third linear rail assemblies 170, the third linear rail assemblies 170 include a third fixed guide rail 171 and a third slider 172 slidably matched with the third fixed guide rail 171, the third fixed guide rails 171 of the two third linear rail assemblies 170 are fixedly connected to the two substrates in a one-to-one correspondence, the third fixed guide rails 171 extend along the Y-axis direction, and the third sliders 172 of the two third linear rail assemblies 170 are fixedly connected to the two mounting plates 145 in a one-to-one correspondence.

[0151] 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 them; 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 replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A winding system for winding a strip, characterized in that: The winding system comprises: The upper winding drum and the lower winding drum are arranged opposite to each other and spaced apart in the vertical direction and can rotate around their own axes; The roll changing mechanism comprises a passing roller, a cutting device and a movable pressing roller which are sequentially arranged along the conveying direction of the strip; the movable pressing roller is located between the upper winding drum and the lower winding drum; The movable pressing roller is configured to be able to move relative to the passing roller, so as to press the head end of the strip material against one of the upper winding drum and the lower winding drum from one side of the strip material, so that the strip material is wound on one of the upper winding drum and the lower winding drum; the cutting device is configured to cut the strip material when the roll wound on one of the upper winding drum and the lower winding drum reaches a preset roll diameter, and the movable pressing roller then moves to the other side of the strip material, so as to drive the strip material to be wound on the other of the upper winding drum and the lower winding drum; Furthermore, during the process that the upper winding drum and the lower winding drum rotate to wind the strip into the material roll, and the cutting device cuts the strip, the movable pressing roller remains tangent to the material roll.

2. The winding system according to claim 1, characterized in that: The roll changing mechanism is configured to be able to rise and fall, and the roll changing mechanism has an upper winding station, a lower winding station and an intermediate station, and the intermediate station is located between the upper winding station and the lower winding station; At the upper winding station, the vertical distance between the passing roller and the upper winding drum in the vertical direction is smaller than the vertical distance between the passing roller and the lower winding drum in the vertical direction, and the movable pressure roller is used to drive the strip to be wound on the upper winding drum; At the lower winding station, the vertical distance between the passing roller and the upper winding drum is greater than the vertical distance between the passing roller and the lower winding drum, and the movable pressure roller is used to drive the strip to be wound on the lower winding drum.

3. The winding system according to claim 2, characterized in that: The roll changing mechanism further comprises a frame and a first actuator, wherein the first actuator, the roller, the cutting device and the movable pressing roller are all arranged on the frame; the first actuator is connected to the frame through a first transmission mechanism to drive the frame to rise and fall; Among them, the first transmission mechanism includes a first fixed rack and a first rotating gear; the first fixed rack extends in the vertical direction; the first rotating gear is connected to the frame and can rotate around its own axis relative to the frame under the driving action of the first actuator; the first fixed rack and the first rotating gear are meshed for transmission, so that the first rotating gear can roll in the vertical direction relative to the first fixed rack.

4. The winding system according to claim 3, characterized in that: It also includes a first linear rail assembly, which includes a first fixed guide rail and a first slider, the first fixed guide rail extends in a vertical direction, the first slider is connected to the frame, and the first slider is slidably connected to the first fixed guide rail.

5. The winding system according to claim 1, characterized in that: The cutting device is configured so that the cut surface formed by cutting the strip is a plane, and the cut surface is perpendicular to two surfaces of the strip that are arranged opposite to each other along its thickness direction.

6. The winding system according to claim 5, characterized in that: The cutting device comprises a second actuator, a flat cutter and a second linear rail assembly, wherein the thickness direction of the flat cutter and the thickness direction of the strip are perpendicular to the axial direction of the roller, and the second actuator is connected to the flat cutter through a second transmission mechanism to drive the flat cutter to reciprocate along the axial direction of the roller; The second linear rail assembly includes a second fixed rail and a second slider slidably matched with the second fixed rail, the extension direction of the second fixed rail is parallel to the axial direction of the roller, and the second slider is connected to the flat cutter.

7. The winding system according to claim 6, characterized in that: The second transmission mechanism is a belt transmission mechanism, and the second transmission mechanism comprises a driving wheel, a driven wheel and a conveyor belt, and the conveyor belt is tensioned on the driving wheel and the driven wheel; The axial direction of the driving wheel is perpendicular to the extension direction of the second fixed guide rail, and the conveyor belt is arranged on the outer periphery of the second linear rail assembly; the flat cutter and the second slider are both connected to the conveyor belt, and the second slider and the flat cutter are located on the same side of the second fixed guide rail.

8. The winding system according to claim 5, characterized in that: When the material roll wound by one of the upper winding drum and the lower winding drum reaches the preset roll diameter, along the conveying direction of the strip, the vertical distance between the center of the movable pressing roller and the cutting device is greater than or equal to 180 mm and less than or equal to 220 mm.

9. The winding system according to any one of claims 1 to 8, characterized in that: The roll changing mechanism further comprises a swing rod, one end of which is arranged on the central axis, and the other end is connected to the movable pressing roller, and the swing rod can rotate forward or reverse along with the central axis; The movable pressing roller is arranged to adaptively adjust its position relative to the material coil as the strip is wound, and can drive the swing rod to adaptively rotate.

10. The winding system according to any one of claims 1 to 8, characterized in that: The roll changing mechanism further comprises a clamping roller which can be raised and lowered relative to the passing roller, the clamping roller being arranged opposite to and parallel to the passing roller, the clamping roller and the passing roller being respectively located on both sides of the strip; the clamping roller is configured to vertically move to abut against the strip when the roll wound by one of the upper winding drum and the lower winding drum reaches the preset winding diameter; The cutting device is configured to cut the strip when the material roll wound by one of the upper winding drum and the lower winding drum reaches the preset roll diameter and the clamping roller and the passing roller jointly clamp the strip.

11. The winding system according to claim 10, characterized in that: The clamping roller is configured to be able to rotate forward or reverse around its own axis; When the cutting device cuts the strip, the clamping roller rotates to drive the strip to be transported in the opposite direction of the conveying direction, so that the head end of the strip can be withdrawn between the clamping roller and the passing roller.

12. The winding system according to any one of claims 1 to 8, characterized in that: The roll changing mechanism further comprises: a traction mechanism, which is located downstream of the cutting device along the conveying direction of the strip; The traction mechanism can reciprocate and translate along a preset horizontal direction, and the preset horizontal direction is perpendicular to the axial direction of the roller; when the cutting device cuts off the strip, the movable pressure roller moves to the other side of the strip, and the traction mechanism moves along the preset horizontal direction again to pull the head end of the strip between the upper winding drum and the lower winding drum.

13. The winding system according to claim 12, characterized in that: The traction mechanism comprises a parallel clamp and a flexible clamp connected to each other. The two clamping fingers of the parallel clamp can be opened and closed in the vertical direction, so that the flexible clamp can clamp the head end of the strip or release the head end of the strip.

14. The winding system according to claim 12, characterized in that: The roll changing mechanism also includes a frame and a third linear rail assembly, the third linear rail assembly includes a third fixed guide rail and a third slider slidably matched with the third fixed guide rail, the third fixed guide rail extends along the preset horizontal direction and is fixedly arranged on the frame, and the traction mechanism is connected to the third slider.

15. The winding system according to claim 12, characterized in that: The roll changing mechanism further comprises a slide bar, and the slide bar is parallel to the passing roller; The upper winding drum, the lower winding drum and the traction mechanism are of the same number and are all multiple; the multiple upper winding drums are coaxially arranged and spaced apart along the extension direction of their own axes, and the multiple lower winding drums are coaxially arranged and spaced apart along the extension direction of their own axes; The plurality of traction mechanisms are all arranged on the slide bar, and the traction mechanisms can slide along the slide bar.

16. A rolling device, characterized in that: The invention comprises two rollers arranged opposite to each other and a winding system as claimed in any one of claims 1 to 15.

17. A battery production system, characterized in that: The battery production system comprises the winding system according to any one of claims 1 to 15, or the battery production system comprises the rolling device according to claim 16.

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