Roll changing device and roll changing control method

Abstract

The invention relates to a roll changing device and a roll changing control method. The roll changing device comprises a rolling mechanism and a roll changing switching mechanism, the roll changing mechanism is arranged on a belt walking path of a pole piece material belt, the rolling mechanism comprises at least two rolling shafts, and the at least two rolling shafts are used for switching and rolling the pole piece material belt in transmission; the reel changing switching mechanism is arranged adjacent to the reel to be wound and used for fixing the pole piece material belt to the surface of the reel to be wound through pressure during reel changing and cutting off the pole piece material belt between the full reel and the reel to be wound so that the pole piece material belt can be wound to the reel to be wound. According to the scheme provided by the invention, the problems of low product quality and low production efficiency caused by adhesive sticking on an empty reel and subsequent cleaning of the adhesive on the reel in related technologies can be avoided.

Description

Technical Field

[0001] The present application relates to the technical field of battery manufacturing equipment, and in particular to a roll changing device and a roll changing control method. Background Art

[0002] In the related art, the reel-changing scheme of the electrode material strip requires sticking double-sided tape or applying glue on the reel to ensure that the electrode cut by the automatic reel change can be firmly adhered to the reel and can be normally reeled on the new reel. However, the related art method has many technical defects: First, reeling and reeling mostly rely on manual operation, and workers need to frequently start and stop the equipment to change the reel. On average, each reel change requires manual intervention, which not only increases labor intensity, but also leads to a significant reduction in production efficiency. Secondly, glue and tape are necessary materials for traditional reeling and reeling. Their storage and use require strict control of environmental conditions. Glue will volatilize harmful gases during use and drying, which not only pollutes the production environment, but also does not meet the environmental protection requirements of modern manufacturing. In addition, waste materials containing glue are difficult to handle, which increases the environmental protection costs of enterprises. Furthermore, manual operation and the use of tape and glue can easily lead to problems such as uneven reeling and loose adhesion. These problems directly affect the overall quality and market competitiveness of the product. What is more serious is that glue residue will affect subsequent processing technology, increase product defect rate, and cause large fluctuations in the tension of the electrode material strip during the reel change process, making it easy to produce wrinkles or breakage.

[0003] Therefore, in view of the above problems, relevant technologies need to be improved urgently to avoid the problems of low product quality and production efficiency caused by applying glue on empty rolls and subsequently cleaning the glue on the rolls. Summary of the Invention

[0004] In order to solve or partially solve the problems existing in the related art, the present application provides a roll changing device and a roll changing control method, which can avoid the problems of low product quality and production efficiency caused by gluing on empty reels and subsequent cleaning of the gluing on the reels in the related art.

[0005] A first aspect of the present application provides a roll changing device, comprising: A winding mechanism is provided on the path of the pole piece material strip, and the winding mechanism includes at least two reels, and the at least two reels are used to switch and rewind the pole piece material strip being transmitted; The reel-changing switching mechanism is arranged adjacent to the reel to be wound, and is used to fix the pole piece strip to the surface of the reel to be wound by pressure when changing the reel, and to cut the pole piece strip between the full reel and the reel to be wound, so that the pole piece strip is wound onto the reel to be wound.

[0006] In one embodiment, the roll switching mechanism includes: A clamping mechanism, comprising a clamping drive device and a clamping member connected to the clamping drive device, wherein the clamping member is arranged on the side of the electrode strip facing away from the reel to be wound, and the clamping roller is used to press the electrode strip to the surface of the reel to be wound when changing the reel, so that the electrode strip forms a winding tension between the unwinding mechanism and the reel to be wound; The cutting mechanism includes a cutting drive device and a cutter connected to the cutting drive device, wherein the cutting drive device is used to drive the cutter to cut the electrode strip between the wound reel and the reel to be wound.

[0007] In one embodiment, the pressing mechanism includes: A swing arm mechanism, the swing arm mechanism comprising a rotating end and a free end, the rotating end being fixedly arranged, and the free end being closer to or farther away from the reel to be wound when rotating around the rotating end; Wherein, the pressing member is a pressing wheel, which is installed at the free end of the swing arm mechanism and is used to press the pole piece strip to the surface of the reel when the free end approaches the reel to be wound.

[0008] In one embodiment, the cutting device is installed on the swing arm mechanism and moves with the swing arm mechanism. When the pressure wheel presses the pole piece strip to the surface of the reel, the cutter moves to align with the position of the pole piece strip to be cut.

[0009] In one embodiment, a guide roller is further included, which is arranged at the free end of the swing arm mechanism and has a set distance between it and the clamping member. The guide roller contacts the side surface of the pole piece strip facing away from the reel, and is used to guide the pole piece strip to be transmitted along the set direction, so that the pole piece strip forms a set wrap angle on the reel.

[0010] In one embodiment, the roll switching mechanism includes: A tension-breaking mechanism is provided upstream of the reel to be wound, and is used to break the tension between the electrode material strip unwinding mechanism and the reel to be wound when the pressing mechanism presses the electrode to the surface of the reel to be wound, until the electrode between the unwinding mechanism and the reel forms a winding tension; and / or, a pressing roller mechanism, comprising a pressing roller that can move closer to or further away from the reel, the pressing roller being used to press the electrode strip to the surface of the reel when approaching the reel to be wound; and / or, a rotary smoothing mechanism, disposed adjacent to the reel to be wound, for smoothing the broken end of the pole piece onto the surface of the reel after the pole piece is cut by the cutting mechanism; In one embodiment, the roll changing device includes: A turret structure is provided downstream of the unwinding mechanism, the turret structure comprising a tower body and at least two reels provided on the tower body, the tower body rotates after the reel at the reel-changing station is wound up, so that the wound reel moves out of the reel-changing station and the reel to be wound enters the reel-changing station; wherein the wound reel and the reel to be wound keep rotating synchronously in the same direction during the reel-changing process; and / or, At least two winding frames, each of which is equipped with a reel, are located downstream of the unwinding mechanism and are arranged in parallel on the pole piece belt path. One of the winding frames is located at a reel-changing station, which is arranged between the unwinding mechanism and the reel-changer. The reel-changer rotates synchronously with the reel to be rewound during the reel-changing process.

[0011] A second aspect of the present application provides a roll changing control method for the roll changing device according to the first aspect, comprising: Controlling the reel-changing switching mechanism to fix the electrode strip to the surface of the reel to be wound by pressure during reel changing; Cutting the electrode strip between the wound reel and the reel to be wound; The reel to be wound is controlled to rotate so that the pole piece strip is wound onto the reel to be wound.

[0012] In one embodiment, the control roll-changing switching mechanism fixes the electrode strip to the surface of the reel to be wound by pressure during roll changing, including: Drive the swing arm mechanism to rotate close to the reel to be wound, so that the pressure wheel at the free end of the swing arm mechanism presses the electrode strip to the surface of the reel to be wound; or, The pressing roller is driven to move toward the reel so that the pressing roller presses the pole piece strip tightly onto the surface of the reel to be wound.

[0013] In one embodiment, the method includes When the clamping mechanism presses the electrode to the surface of the reel to be wound, the tension isolating mechanism is controlled to isolate the tension of the electrode material strip between the unwinding mechanism and the reel to be wound until the electrode material strip between the unwinding mechanism and the reel forms a preset winding tension.

[0014] The technical solution provided by this application may have the following beneficial effects: The present application provides a reel-changing device, which includes a reeling mechanism and a reel-changing switching mechanism. The reel-changing mechanism is arranged on the tape path of the electrode material strip, and the reeling mechanism includes at least two reels, and the at least two reels are used to switch and reel the electrode material strip in transmission; the reel-changing switching mechanism is arranged adjacent to the reel to be reeled, and is used to fix the electrode material strip to the surface of the reel to be reeled by pressure during reeling, and cut the electrode material strip between the full reel and the reel to be reeled, so that the electrode material strip is wound onto the reel to be reeled. The present application replaces adhesive fixation with mechanical compression during the reel-changing process, eliminating the use of harmful adhesive substances in related technologies, and can realize automatic reeling of the electrode material strip without stopping the machine, reducing the frequency of manual intervention, eliminating the need to reserve glue drying time, reducing labor costs, and significantly improving the operation efficiency of the production line.

[0015] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and other objects, features and advantages of the present application will become more apparent through a more detailed description of exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.

[0017] Figure 1 This is a schematic diagram of the coordination between the roll changing switching mechanism and the turret structure of the roll changing device shown in one embodiment of the present application; Figure 2 Schematic diagram of the structure of the swing arm mechanism of the roll changing device shown in the embodiment of the present application; Figure 3 Schematic diagram of the coordination between the swing arm mechanism and the winding frame of the roll changing device shown in the embodiment of the present application; Figure 4 This is a schematic diagram of the reel changing device shown in the embodiment of the present application after the electrode strip is cut in the reeling frame; Figure 5 This is a schematic diagram of the roll changing device shown in an embodiment of the present application, in which the pressure roller and the cutting device in the winding frame are in an initial state; Figure 6 This is a schematic diagram of a roll changing device in an embodiment of the present application, in which a pressure roller and a cutting device in a winding frame are in a roll changing state; Figure 7 Schematic diagram of the coordination between the tension isolation mechanism and the unwinding mechanism in the winding frame of the roll changing device shown in an embodiment of the present application; Figure 8 Schematic diagram of the structure of the tension isolation mechanism of the roll changing device in the winding frame shown in the embodiment of the present application; Figure 91 is a flow chart of a roll change control method according to an embodiment of the present application; Figure 10 It is a flow chart of a roll changing control method shown in another embodiment of the present application.

[0018] Figure numerals: 100, turret structure; 101, tower body; 102, guide wheel; 001, pole piece strip; 110, reel; 200, swing arm mechanism; 210, rotating end; 211, swing arm; 2101, support arm; 220, pressure wheel; 230, guide roller; 240, cutter; 300, unwinding mechanism; 310, unwinding roller; 301, unwinding roller; 320, tension isolation mechanism; 321, tension isolation roller; 322, isolation drive member; 323, rotating shaft; 324, bracket; 400, winding frame; 410, guide roller; 420, pressure roller; 430, rotating smoothing roller; 440, second guide roller. DETAILED DESCRIPTION

[0019] The preferred embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. Instead, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0020] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. As used in this application and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0021] It should be understood that although the terms "first", "second", "third", etc. may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0022] In the description of this application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0023] Unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they may refer to fixed or detachable connections, or integration; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0024] In the related technologies, the reel-changing scheme generally relies on double-sided tape or glue to fix the electrode material strip to the surface of the reel. The gluing and subsequent cleaning of the glue on the reel result in low product quality and production efficiency. In response to the above problems, the R&D personnel found that the core contradiction of the traditional process lies in the lack of a reliable mechanical fixing method to replace the adhesive. By analyzing the transmission dynamic characteristics of the electrode material strip, it was found that glue-free fixation can be achieved by using dynamic compression and tension control. Then a reel-changing device and reel-changing control method were proposed, which can avoid the problems of low product quality and production efficiency caused by gluing on the empty reel and subsequent cleaning of the glue on the reel in the related technology.

[0025] The technical solutions of the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0026] Figure 1 This is a schematic diagram of the coordination between the roll changing switching mechanism and the turret structure of the roll changing device shown in one embodiment of the present application.

[0027] See also Figure 1 The present application provides a roll-changing device, which includes a roll-up mechanism and a roll-changing switching mechanism; the roll-up mechanism is arranged on the tape path of the pole piece tape 001, and the roll-up mechanism includes at least two reels 110, and at least two reels 110 are used to switch and rewind the pole piece tape 001 in transmission; the roll-changing switching mechanism is arranged adjacent to the reel 110 to be rewound, and is used to fix the pole piece tape 001 to the surface of the reel 110 to be rewound by pressure when changing the roll, and cut the pole piece tape 001 between the reeled reel 110 and the reel 110 to be rewound.

[0028] The winding mechanism can adopt a turret-type rotating mechanism or a parallel rack layout, but is not limited to these. The turret mechanism switches winding stations by rotating the tower body 101, while the parallel rack completes the replacement of the reel 110 through translational movement. When the running reel 110 reaches a full state, the reel switching mechanism is activated, and the electrode strip 001 is fixed to the surface of the reel 110 to be wound by pressure, and the electrode strip 001 is cut at the preset position.

[0029] Compared with the existing technology, this solution uses mechanical compression instead of adhesive fixation, eliminating the use of harmful substances, and can realize automatic roll change of the electrode material strip 001 without stopping the machine, reducing the frequency of manual intervention. Compared with traditional processes, there is no need to reserve glue drying time, reducing labor costs and significantly improving production line operation efficiency.

[0030] In some embodiments, when a turret structure 100 is used, the turret structure 100 is arranged downstream of the unwinding mechanism. The turret structure 100 includes a tower body 101 and at least two reels 110 arranged on the tower body 101. The unwinding mechanism introduces the pole piece strip into the reel 110 to be wound on the turret structure 100 through the guide wheel 102.

[0031] After the reel 110 at the reel-changing station has finished winding, the tower body 101 rotates, causing the wound reel 110 to move out of the reel-changing station and the reel 110 to be wound to enter the reel-changing station. The wound reel 110 and the reel 110 to be wound rotate synchronously and in the same direction during the reel-changing process. The turret structure 100 can utilize a rotating platform driven by a servo motor, and the reel 110 mounted on the tower body 101 can rotate with the tower body 101 to switch stations. By rotating the tower body 101, the turret structure 100 removes the completed reeling station from the work area and aligns the preparatory station with the unwinding mechanism 300. During this process, the old and new reels 110 rotate synchronously, ensuring stable transmission of the electrode strip 001 during the switching process.

[0032] Figure 3 Schematic diagram of the coordination between the swing arm mechanism and the winding frame of the roll changing device shown in the embodiment of the present application; Figure 4 This is a schematic diagram of the reel changing device shown in an embodiment of the present application after the pole piece strip is cut in the reeling frame.

[0033] See also Figure 3 and Figure 4In some embodiments, when at least two winding racks 400 are used, reels 110 are mounted on at least two winding racks 400. The unwinding mechanism introduces the electrode material strip into the reel 110 of the reel-changing station via at least two unwinding rollers 301 and a first guide roller 410. The at least two rewinding racks 400 are located downstream of the unwinding mechanism 300 and are arranged in parallel on the path of the electrode material strip 001. One of the rewinding racks 400 is located at the reel-changing station, which is located between the unwinding mechanism 300 and the reeled winding rack 400. The rewinding rack of the reel-changing station is provided with a first guide roller 410. Before rewinding, the electrode material strip passes through a second guide roller 440 and is wound around the reel 110 of the rewinding rack 400 outside the reel-changing station.

[0034] The wound reel 110 and the reel 110 to be wound rotate synchronously and in the same direction during the reel change process. The reel frame 400 refers to a support frame that independently supports the reel 110. This can be implemented using linear guides combined with a hydraulically driven mobile platform. Multiple frames arranged in parallel can form alternating reeling stations. After the reel change station completes reeling, the adjacent frames are moved into their working positions via a translation mechanism. The old and new reels 110 continue to rotate at the same speed during the alternating process, ensuring a smooth transition of the web. Both implementations achieve automatic reel change without gluing through spatial transformation of the mechanical structure combined with motion control.

[0035] It is worth noting that the swing arm mechanism 200 of the present application can be applied to an embodiment of the turret structure 100, and can also be applied to an embodiment of at least two winding frames 400, and the present application does not limit this.

[0036] See also Figure 3 When the swing arm mechanism 200 is used in an embodiment with at least two winding frames 400, the rotating end of the swing arm mechanism 200 is rotatably connected to the frame 400. When the swing arm mechanism rotates, it can drive the pressure roller 220 toward or away from the winding shaft 110 on the winding frame. In addition, in addition to using the swing arm mechanism 200 to achieve roll switching in the embodiment with at least two winding frames 400, a combination of a tension isolation mechanism, a pressure roller 420, and a cutting device can also be used to achieve roll switching, although this application is not limited to this.

[0037] Figure 2 Schematic diagram of the structure of the swing arm mechanism 200 of the roll changing device shown in an embodiment of the present application. Figure 2 An embodiment is shown in which a pressing mechanism and a cutting mechanism are provided in the swing arm mechanism 200 .

[0038] See also Figure 2In some embodiments, the reel switching mechanism includes a clamping mechanism and a cutting mechanism. The clamping mechanism includes a clamping drive device and a clamping member that is transmission-connected to the clamping drive device. The clamping member is disposed on the side of the electrode strip 001 that faces away from the reel 110 to be wound. The clamping member is used to press the electrode strip 001 against the surface of the reel 110 to be wound during reel switching, thereby forming a winding tension between the electrode strip 001 and the unwinding mechanism 300 and the reel 110 to be wound. The cutting mechanism includes a cutting drive device and a cutter 240 that is transmission-connected to the cutting drive device. The cutting drive device is used to drive the cutter 240 to cut the electrode strip 001 between the wound reel 110 and the reel 110 to be wound.

[0039] The clamping drive device refers to the power source that drives the clamping roller to move, and specifically, a cylinder or a servo motor can be used to drive the clamping roller to contact the pole piece strip 001 through linear motion or rotational motion. The clamping member can be a cylindrical rolling component, and specifically, a metal wheel body with a surface coated with rubber or polyurethane can be used to press the pole piece strip 001 onto the surface of the reel 110 through rolling friction. The cutting drive device refers to the power source that drives the cutter 240 to move, and specifically, a linear cylinder or a rotary motor can be used to control the stroke of the cutter 240 through mechanical transmission. The cutter 240 refers to a cutting component with a sharp blade, and specifically, a carbide blade or a ceramic blade can be used to separate the pole piece strip 001 by linear cutting.

[0040] See also Figure 1 and Figure 2 When the reel-changing action is triggered, the clamping drive device pushes the clamping roller to move toward the reel 110, and the clamping roller presses the electrode strip 001 against the surface of the reel 110 to form a contact area. At this time, the electrode strip 001 between the unwinding mechanism 300 and the reel 110 generates stable tension due to the clamping effect, and the cutting drive device then drives the cutter 240 to move in a straight line perpendicular to the material strip transmission direction, completing the cutting operation in the transition area between the reel 110 that has been wound and the reel 110 to be wound. The end of the cut electrode strip 001 is automatically wound around the reel 110 under the rotation of the reel 110, thereby realizing the automatic switching of the reeling of the new and old reels 110.

[0041] Continue to see Figure 2 In some specific embodiments, the clamping mechanism includes a swing arm mechanism 200, and the swing arm mechanism 200 includes a rotating end 210 and a free end. The rotating end 210 is fixed, and the free end approaches or moves away from the reel 110 to be wound when it rotates around the rotating end 210; the clamping member can be a pressure wheel 220, and the pressure wheel 220 can be multiple, and multiple pressure rollers 420 are coaxially arranged in parallel. The multiple pressure wheels 220 are installed at the free end of the swing arm mechanism 200, and are used to synchronously press the pole piece strip 001 to the surface of the reel 110 when the free end approaches the reel 110 to be wound.

[0042] The swing arm mechanism 200 includes a rigid swing arm 211, hinged or supported by bearings. The arm 211 is L-shaped, with its rotating end 210 mounted to the device body via a fixed base or bracket. The free end is controlled by a drive device to control its rotation angle. The pressure roller 220 is a rolling component that contacts the electrode strip 001. Specifically, it can be a metal roller with a non-slip surface or a rubber-coated cylinder. Its axis remains parallel to the reel 110.

[0043] In this embodiment, the pressure roller 420 is mounted on the inner side of the L-shaped rigid swing arm 211 facing the reel 110. When the pole piece strip 001 needs to be switched to a new reel 110, the free end of the swing arm mechanism 200 is driven to rotate about the rotating end 210 toward the reel 110, driving the pressure roller 220 to move synchronously toward the reel 110. During the movement, after contacting the pole piece strip 001, the pressure roller 220 continues to move closer to the reel 110 until the strip is pressed against the surface of the reel 110 to form a fixed contact area.

[0044] During this process, the pressure between the pressure wheel 220 and the reel 110 causes local deformation of the pole piece strip 001, using friction instead of traditional adhesive methods to fix the strip to the surface of the reel 110. In addition, the rotation trajectory of the swing arm mechanism 200 is a circular path, so that the pressure wheel 220 applies pressure in a tangential direction when contacting the strip, preventing the strip from lateral deviation. Furthermore, the coordinated action of the pressure wheel 220 and the swing arm mechanism 200 enables the rapid positioning and fixation of the pole piece strip 001 on the surface of the reel 110, improving the degree of automation and production continuity of the reel change process.

[0045] In some embodiments, the cutting device is mounted on the swing arm mechanism 200 and moves with the swing arm mechanism 200. When the pressure wheel 220 presses the pole piece strip 001 to the surface of the reel 110, the cutter 240 moves to align with the position of the pole piece strip 001 to be cut. Specifically, the swing arm mechanism 200 rotates around the fixed rotating end 210 during the reel change process, driving the pressure wheel 220 at the free end to move toward the surface of the reel 110. When the pressure wheel 220 contacts and presses the pole piece strip 001 to the surface of the reel 110, the cutting device mounted on the same swing arm mechanism 200 moves synchronously with the motion trajectory of the swing arm mechanism 200, so that the cutter 240 automatically reaches the position of the pole piece strip 001 to be cut. At this time, the driving device controlling the cutting device is started, and the cutter 240 performs the cutting action through linear motion. In this embodiment, since the pressing action of the pressing wheel 220 and the alignment action of the cutter 240 are realized through the same swing arm mechanism 200, the motion trajectories and timings of the two are completely synchronized, ensuring that the pole piece strip 001 between the cutting position and the pressing position is in a stable state.

[0046] The solution of the present application integrates the cutting device into the swing arm mechanism 200 and utilizes the mechanical linkage characteristics of the swing arm 211 movement to spatially associate the position of the cutter 240 with the pressing action of the pressure wheel 220, thereby achieving precise alignment without additional control and reducing the number of independent drive components. Continue to see Figure 2 In some embodiments, a guide roller 230 is further included. There is a set distance between the guide roller 230 and the pressure wheel 220. The guide roller 230 contacts the side surface of the pole piece strip 001 away from the reel 110, and is used to guide the pole piece strip 001 to be transmitted along the set direction, so that the pole piece strip 001 forms a set wrap angle on the reel 110.

[0047] Specifically, the guide roller 230 can be a metal roller with a smooth surface or a rubber-coated roller, which is used to contact the surface of the pole piece strip 001 and guide its transmission direction. The set spacing refers to the spacing distance between the guide roller 230 and the pressure wheel 220, which can be achieved by adjusting the installation position of the guide roller 230 or using a movable bracket structure. The wrap angle refers to the arc angle range of the pole piece strip 001 in contact with the reel 110, which can be achieved by adjusting the position of the guide roller 230 relative to the reel 110. It is used to control the contact area and tension distribution between the pole piece strip 001 and the reel 110.

[0048] In some embodiments, the guide roller 230 may be provided on the swing arm mechanism 200, for example, at the free end of the swing arm mechanism 200, specifically, at the end of the L-shaped rigid swing arm 211 away from the rotation center. For example, the L-shaped rigid swing arm 211 includes two intersecting arms 2101, and the guide roller 230 is provided at the end of one of the arms 2101 away from the rotation center. When the swing arm mechanism 200 is controlled to rotate so that the pressure wheel 220 presses the pole piece strip 001 toward the reel 110, the guide roller 230 moves synchronously and always contacts the surface of the pole piece strip 001. The guide roller 230230 guides the pole piece strip 001 to form a stable wrap angle with the reel 110 by guiding it to transfer along a preset path. For example, when the swing arm mechanism 200 drives the pressure wheel 220 to approach the reel 110, the relative position change between the guide roller 230 and the reel 110 forces the pole piece strip 001 to be wound on the surface of the reel 110 at a specific angle, thereby avoiding slipping due to too small a wrap angle or wrinkles due to too large a wrap angle during winding. Furthermore, through the coordinated action of the guide roller 230 and the pressure wheel 220, it is ensured that the pole piece has formed a stable wrap angle before being cut, thereby avoiding the use of the gluing process on the surface of the reel 110, while improving the degree of automation of the reel changing process and the consistency of the winding quality.

[0049] It is worth noting that the guide roller 230 and the cutting device of the present application are not limited to being set in the swing arm mechanism 200. In other embodiments, the guide roller 230 and the cutting device can be set at a set position of the frame and driven by an independent driving device to realize the guiding and cutting functions respectively. The present application does not limit this.

[0050] Figure 5 Schematic diagram of the roll changing device in the embodiment of the present application, in which the pressure roller 420 and the cutting device in the winding frame 400 are in the initial state; Figure 6 Schematic diagram of a roll changing device in an embodiment of the present application, in which a pressure roller 420 and a cutting device in a winding frame 400 are in a roll changing state; Figure 7 Schematic diagram of the coordination between the tension isolation mechanism and the unwinding mechanism 300 in the winding frame 400 of the roll changing device shown in an embodiment of the present application.

[0051] See also Figures 5 to 7 In some embodiments, when the present application adopts at least two parallel winding racks 400, the roll changing device further includes a tension isolation mechanism ( Figure 7 As shown in the figure), the tension isolating mechanism is arranged upstream of the reel 110 to be wound, for example, it cooperates with the unwinding roller 310 of the unwinding mechanism 300. When the clamping mechanism presses the electrode to the surface of the reel 110 to be wound, the tension isolating mechanism is used to isolate the tension between the electrode strip 001 unwinding mechanism 300 and the reel 110 to be wound, that is, the tension isolating mechanism can temporarily block the tension transmission between the unwinding mechanism 300 and the reel 110 during the reel change process until the electrode between the unwinding mechanism 300 and the reel 110 forms a winding tension. The winding tension is the stable traction force formed between the electrode strip 001 between the unwinding mechanism 300 and the reel 110 during the winding process, which ensures that the electrode is evenly wound on the surface of the reel 110.

[0052] See also Figure 8 In some embodiments, the tension-breaking mechanism 320 is mounted on a bracket 324 via a rotating shaft 323. The tension-breaking mechanism 320 can rotate about the rotating shaft 323, thereby moving closer to or further away from the unwinding roller 310. The bracket 324 is mounted on one side of the unwinding mechanism 300. The tension-breaking mechanism 320 includes a breaking drive 322 and a tension-breaking roller 321 connected to the breaking drive 322. The breaking drive 322 can drive the tension-breaking roller 321 closer to or further away from the unwinding roller 310 of the unwinding mechanism 300.

[0053] When the clamping mechanism presses the electrode strip 001 against the surface of the reel 110 to be wound, the tension-breaking mechanism 320 immediately activates, controlling the tension-breaking roller 321 to approach and contact the unwinding roller 310, applying radial pressure to the material on the unwinding roller 310, thereby blocking the transmission of tension between the unwinding mechanism 300 and the reel 110. At this point, the unwinding mechanism 300 continues to release the electrode strip 001, but the released electrode strip 001 is temporarily stored in the buffer area between the tension-breaking mechanism 320 and the clamping mechanism. When the reel 110 begins to rotate and establishes a stable winding tension, the tension-breaking driver 322 controls the tension-breaking roller 321 to move away from the unwinding roller 310. At this point, the tension-breaking mechanism 320 releases its blocking state, allowing the electrode strip 001 of the unwinding mechanism 300 to resume continuous transmission. This entire process achieves tension transition through timing control, preventing the electrode strip 001 from breaking or loosening due to sudden tension changes at the moment of reel change.

[0054] This solution actively controls the tension transmission path through the tension isolation mechanism 320, forming a physically isolated tension buffer area during the roll changing process, so that the tension establishment process between the unwinding mechanism 300 and the reel 110 is completely independent, and stable roll changing can be achieved without relying on adhesive materials.

[0055] See also Figures 5 to 7 In some embodiments, in addition to the aforementioned pressure roller 220, the pressure element of the reel-changing device may be a pressure roller mechanism. The pressure roller mechanism refers to a device that mechanically drives the pressure roller 420 to generate contact pressure with the reel 110. Specifically, this can be achieved by using a cylinder or servo motor to drive the pressure roller 420 to move along a linear guide rail. The pressure roller mechanism includes a pressure roller 420 that can move closer to or further away from the reel 110. The pressure roller 420 is used to press the electrode strip 001 against the surface of the reel 110 when it approaches the reel 110 to be wound. The pressure roller 420 and the surface of the reel 110 clamp the electrode strip 001 to form a fixed position.

[0056] In some embodiments, the reel-changing device further includes a rotary smoothing mechanism disposed adjacent to the reel 110 to be rewound. The rotary smoothing mechanism is configured to smooth the broken end of the electrode piece against the surface of the reel 110 after the electrode piece is severed by the cutting mechanism. The rotary smoothing mechanism refers to a surface treatment device with a rotary motion function, specifically comprising a drive mechanism and a rotary smoothing roller 430 connected to the drive mechanism. The drive mechanism is capable of driving the rotary smoothing roller 430 away from or toward the reel 110. Specifically, the rotary smoothing roller 430 is a rubber roller having an elastic contact surface. The rotary friction of the contact surface causes the broken end of the electrode piece to adhere to the surface of the reel 110.

[0057] When a reel change is detected, the pressure roller 420 and the cutting device move together along a straight path (e.g., vertically upward) toward the reel 110 until the electrode strip 001 is pressed against the surface of the reel 110 to form a fixed contact area. At this point, the cutting device is activated to complete the strip separation, and the rotary smoothing mechanism is immediately activated. Its rotating parts move circumferentially along the reel 110, and the friction of the contact surface smoothes the edge of the electrode cut to the surface of the reel 110.

[0058] This solution directly fixes the pole piece strip 001 through the mechanical pressing action of the pressure roller 420. At the same time, the rotating smoothing mechanism eliminates the risk of the pole piece strip breaking and warping. The synergistic action of the mechanical structure ensures the initial fixation reliability of the strip on the reel 110 after the roll is changed, solving the problem of loose winding caused by glue failure in the traditional process.

[0059] This application achieves fully automated, glue-free reel-changing, effectively resolving the technical challenges of low efficiency and severe environmental pollution associated with traditional processes. The spatial conversion mechanism of the turret structure 100 and the parallel layout of the rewinding frame 400, combined with precise synchronous control technology, ensure that the pole piece strip 001 maintains stable tension during reel-changing, preventing material deformation or breakage, significantly improving production continuity and product quality consistency.

[0060] The roll changing device of the present application is introduced above. Accordingly, the present application also provides a roll changing control method based on the above roll changing device.

[0061] See also Figure 9 , the method comprises the following steps: S110 , controlling the roll-changing switching mechanism to press the electrode strip to the surface of the reel 110 to be wound when changing the roll.

[0062] In this step, when the control system receives the roll-changing instruction, it first drives the roll-changing switching mechanism to press the running electrode strip 001 tightly against the surface of the reel 110 at the winding station.

[0063] S120, cutting the electrode strip between the wound reel and the reel to be wound.

[0064] In this step, the cutter 240 device is triggered to instantly cut the pole piece strip 001 between the coil of the fully loaded reel 110 and the reel to be reeled.

[0065] S130 , controlling the rotation of the reel to be wound, so that the electrode strip is wound onto the reel 110 to be wound.

[0066] In this step, after the electrode strip 001 is cut and fixed to the reel 110 to be wound, the reel 110 is controlled to rotate continuously, and the strip can be automatically wound on the reel 110.

[0067] Compared with related technologies that rely on manual operation and adhesive materials, require machine downtime during roll changes, and wait time for the glue to cure, this solution replaces adhesive fixation with mechanical compression. Roll changes can be completed while the equipment is running continuously, without manual intervention, effectively improving roll change efficiency.

[0068] See also Figure 10 In some embodiments, more specifically, the method of the present application includes the following steps: S210. After detecting a full-roll signal of the reel, the turret structure is controlled to rotate after the reel at the reel-changing station is wound up, so that the wound reel moves out of the reel-changing station and the reel to be wound enters the reel-changing station.

[0069] In this step, before executing the core actions of reel changing (pressing the material strip, cutting the material strip, and synchronous rotation), the reel diameter of the running reel 110 is detected in real time. When the detection value reaches the preset full-roll threshold, the control system first completes the reeling cycle of the current reeling station; then the drive device of the turret structure 100 is controlled to operate, driving the tower body 101 carrying the reel 110 to accurately rotate a predetermined angle (for example, 120° or 180°). This rotation action allows the fully loaded reel 110 that has completed reeling to move out of the reel changing station, and at the same time, an empty and ready reel 110 to be reeled is accurately rotated and positioned into the reel changing station, ready to perform subsequent material splicing operations.

[0070] S220, driving the swing arm mechanism to rotate close to the reel to be wound, so that the pressure wheel at the free end of the swing arm mechanism presses the electrode strip to the surface of the reel to be wound.

[0071] In this step, when a reel change is detected, the control system first activates the drive device of the swing arm mechanism 200, causing the swing arm 211 to swing around the rotating end 210 toward the reel 110 to be wound, driving the pressure roller 220 at the free end to gradually approach the surface of the reel 110. As the swing arm 211 continues to rotate, the pressure roller 220 eventually presses the electrode strip 001 against the circumferential surface of the reel 110, forming a stable contact pressure, ensuring that the strip and the surface of the reel 110 generate sufficient friction and contact area to achieve reliable reel connection.

[0072] Another implementation method is that the control system drives a linear actuator (such as a hydraulic cylinder or an electric push rod) located above the reel 110 to be wound, pushing a pressure roller 420 of appropriate length to move downward in a direction perpendicular to the axis of the reel 110 until the pressure roller 420 firmly presses and adheres the running electrode material strip 001 to the cylindrical surface of the reel 110 to be wound, and ensures that the electrode is smoothly wound into the reel 110 to be wound by applying uniform pressure on the roller surface. In the solution of this embodiment, both the swing arm mechanism 200 and the pressure roller 420 that advances in a straight line (for example, vertically upward) replace the traditional gluing method with mechanical clamping to maintain the contact stability between the electrode and the surface of the reel 110 during the pressing process.

[0073] In an embodiment of multiple winding frames 400, the method of this embodiment includes: controlling the tension isolation mechanism to isolate the tension between the electrode material strip 001 unwinding mechanism 300 and the reel 110 to be wound when the clamping mechanism presses the electrode to the surface of the reel 110 to be wound, until the electrode between the unwinding mechanism 300 and the reel 110 forms a preset winding tension.

[0074] At the critical moment when the pressure wheel 220 or the pressure roller 420 is about to or is pressing the electrode material strip 001 to the surface of the reel 110 to be wound in the roll-changing switching mechanism, the control system synchronously triggers the tension isolation mechanism to act immediately, and imposes a physical barrier or high damping state on the material strip path between the unwinding mechanism 300 and the reel 110 to be wound. The tension isolation mechanism effectively absorbs or isolates the potential tension fluctuations at the unwinding end to prevent it from causing impact on the fragile material connection point. This isolation state is maintained until the reel 110 to be wound successfully pulls the electrode material strip 001 and gradually accelerates to a linear speed consistent with the process requirements. Finally, a stable and controllable winding tension is established on the reel 110 through the closed-loop tension control system. At this time, the tension isolation mechanism is released.

[0075] S230, controlling the cutting device to cut the electrode strip between the wound reel and the reel to be wound.

[0076] In this step, the cutting drive device drives the cutter 240 to move in a straight line perpendicular to the material tape transmission direction, and completes the cutting operation in the transition area between the wound reel 110 and the reel 110 to be wound.

[0077] S240: Control the wound reel and the reel to be wound to keep rotating synchronously in the same direction during the reel changing process.

[0078] In this step, the pressure roller 420 continuously presses the reel 110 to be wound, and the reel 110 to be wound continues to be wound until the winding tension is fully established and the tension isolation of the tension isolation mechanism is released. In addition, after the material strip is cut, the rolled reel 110 continues to rotate, so that the end of the cut-off electrode material strip 001 is automatically wound around the reel 110 under the rotation of the reel 110, thereby realizing the automatic switching of the winding of the new and old reels 110.

[0079] The technical solution of this embodiment uses mechanical compression instead of adhesive fixation during the reel changing process, ensuring that the electrode strip 001 always maintains stable tension during the reel changing process, avoiding material deformation or breakage, eliminating the use of harmful substances, and can achieve automatic switching without stopping the machine, reducing the frequency of manual intervention. Compared with traditional processes, there is no need to reserve glue drying time, reducing labor costs and significantly improving production line operation efficiency.

[0080] The embodiments of the present application have been described above. The above description is illustrative and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or improvements to the technology in the market, or to enable other persons skilled in the art to understand the embodiments disclosed herein.

Claims

1. A roll changing device, characterized in that: include: A winding mechanism is provided on the path of the pole piece material strip, and the winding mechanism includes at least two reels, and the at least two reels are used to switch and rewind the pole piece material strip being transmitted; The reel-changing switching mechanism is arranged adjacent to the reel to be wound, and is used to fix the pole piece strip to the surface of the reel to be wound by pressure when changing the reel, and to cut the pole piece strip between the full reel and the reel to be wound, so that the pole piece strip is wound onto the reel to be wound.

2. The roll changing device according to claim 1, characterized in that: The roll changing switching mechanism includes: A clamping mechanism, comprising a clamping drive device and a clamping member connected to the clamping drive device, wherein the clamping member is arranged on the side of the electrode strip facing away from the reel to be wound, and the clamping roller is used to press the electrode strip to the surface of the reel to be wound when changing the reel, so that the electrode strip forms a winding tension between the unwinding mechanism and the reel to be wound; The cutting mechanism includes a cutting drive device and a cutter connected to the cutting drive device, wherein the cutting drive device is used to drive the cutter to cut the electrode strip between the wound reel and the reel to be wound.

3. The roll changing device according to claim 2, characterized in that: The pressing mechanism comprises: A swing arm mechanism, the swing arm mechanism comprising a rotating end and a free end, the rotating end being fixedly arranged, and the free end being closer to or farther away from the reel to be wound when rotating around the rotating end; Wherein, the pressing member is a pressing wheel, which is installed at the free end of the swing arm mechanism and is used to press the pole piece strip to the surface of the reel when the free end approaches the reel to be wound.

4. The roll changing device according to claim 3, characterized in that: The cutting device is installed on the swing arm mechanism and moves with the swing arm mechanism. When the pressure wheel presses the pole piece strip to the surface of the reel, the cutter moves to align with the position of the pole piece strip to be cut.

5. The roll changing device according to claim 3, characterized in that: It also includes a guide roller, which is arranged at the free end of the swing arm mechanism and has a set distance between it and the clamping member. The guide roller contacts the side surface of the pole piece strip facing away from the reel, and is used to guide the pole piece strip to be transmitted along the set direction so that the pole piece strip forms a set wrap angle on the reel.

6. The roll changing device according to claim 2, characterized in that: The roll changing switching mechanism includes: A tension-breaking mechanism is provided upstream of the reel to be wound, and is used to break the tension between the electrode material strip unwinding mechanism and the reel to be wound when the pressing mechanism presses the electrode to the surface of the reel to be wound, until the electrode between the unwinding mechanism and the reel forms a winding tension; and / or, a pressing roller mechanism, comprising a pressing roller that can move closer to or further away from the reel, the pressing roller being used to press the electrode strip to the surface of the reel when approaching the reel to be wound; and / or, A rotary smoothing mechanism is provided adjacent to the reel to be wound up, and is used for smoothing the broken end of the pole piece on the surface of the reel after the pole piece is cut by the cutting mechanism.

7. The roll changing device according to claim 1, characterized in that: include: A turret structure is provided downstream of the unwinding mechanism, the turret structure comprising a tower body and at least two reels provided on the tower body, the tower body rotates after the reel at the reel-changing station is wound up, so that the wound reel moves out of the reel-changing station and the reel to be wound enters the reel-changing station; wherein the wound reel and the reel to be wound keep rotating synchronously in the same direction during the reel-changing process; and / or, At least two winding frames, each of which is equipped with a reel, are located downstream of the unwinding mechanism and are arranged in parallel on the pole piece belt path. One of the winding frames is located at a reel-changing station, which is arranged between the unwinding mechanism and the reel-changer. The reel-changer rotates synchronously with the reel to be rewound during the reel-changing process.

8. A roll changing control method for a roll changing device according to any one of claims 1 to 7, characterized in that: include: Control the roll-changing switching mechanism to fix the electrode strip to the surface of the reel to be wound by pressure during roll changing; Cutting the electrode strip between the wound reel and the reel to be wound; The reel to be wound is controlled to rotate so that the pole piece strip is wound onto the reel to be wound.

9. The method according to claim 8, characterized in that The control roll switching mechanism fixes the electrode strip to the surface of the reel to be wound by pressure during roll changing, including Drive the swing arm mechanism to rotate close to the reel to be wound, so that the pressure wheel at the free end of the swing arm mechanism presses the electrode strip to the surface of the reel to be wound; or, The pressing roller is driven to move toward the reel so that the pressing roller presses the pole piece strip tightly onto the surface of the reel to be wound.

10. The method according to claim 8, characterized in that include When the clamping mechanism presses the electrode to the surface of the reel to be wound, the tension isolating mechanism is controlled to isolate the tension of the electrode strip between the unwinding mechanism and the reel to be wound until the electrode strip between the unwinding mechanism and the reel forms a preset winding tension.

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