Pole piece winding device and rubberizing control method

Abstract

The invention relates to a pole piece winding device and a rubberizing control method. The pole piece winding device comprises a winding shaft, a cutting mechanism, a rubberizing mechanism and a control module, the winding shaft is used for winding the pole piece; the cutting mechanism is arranged at a preset position of a pole piece conveying path, and when the rolling diameter of the rolling shaft reaches a set threshold value, the pole piece is cut off at a cutting point set on the pole piece path; the rubberizing mechanism is arranged adjacent to the winding shaft and is used for fixing the tail end of the pole piece on the coiled material main body; and the control module is electrically connected with the winding shaft, the cutting mechanism and the rubberizing mechanism, and is used for controlling the winding shaft to rotate by a distance corresponding to length information based on the length information of the pole piece from the cutting point to the rubberizing point, and controlling the rubberizing mechanism to execute rubberizing operation when the winding shaft rotates to the distance. According to the scheme, the rubberizing positioning efficiency can be improved, the complex structure of a traditional visual positioning system is avoided, the equipment cost is reduced, and the positioning reliability is improved.

Description

Technical Field

[0001] The present application relates to the field of battery manufacturing technology, and in particular to a pole piece winding device and a gluing control method. Background Art

[0002] The winding and tail gluing mechanism in the electrode winding device is a key equipment component in the lithium battery electrode manufacturing process. It is mainly used to fix the tail of the electrode during the electrode winding process to ensure that the electrode remains neat and stable after winding to avoid looseness or deformation.

[0003] In related technologies, the tail glue operation generally needs to be based on visual inspection. For example, image acquisition equipment and auxiliary light sources need to be installed next to the labeling machine to detect the tail glue cutting position. The complex structure will take up more space, the maintenance workload will be large, and it will also lead to increased costs. Summary of the Invention

[0004] In order to solve or partially solve the problems existing in the related art, the present application provides a pole piece winding device and a glue sticking control method, which can improve the efficiency of glue sticking positioning, avoid the complex structure of the traditional visual positioning system, reduce equipment costs and improve positioning reliability.

[0005] A first aspect of the present application provides a pole piece winding device, comprising: Reeling shaft, used to reel in the pole piece; A cutting mechanism is provided at a predetermined position on the electrode transmission path, and when the winding diameter of the reel reaches a set threshold, the electrode is cut off at a cutting point set on the electrode path; A gluing mechanism, disposed adjacent to the reel, for fixing the tail end of the pole piece to the coil body; The control module is electrically connected to the reel, the cutting mechanism and the gluing mechanism. It is used to control the winding shaft to rotate a distance corresponding to the length information based on the pole piece length information from the cutting point to the gluing point, and control the gluing mechanism to perform the gluing operation when rotating to the distance.

[0006] In one embodiment, the gluing mechanism includes a driving member, a guide mechanism, and a gluing machine; the driving member is used to drive the gluing machine to move along the guide mechanism, and the guide mechanism is used to guide the gluing machine to move in a direction perpendicular to the winding shaft; The control module is further configured to control the operating state of the driving member according to the winding diameter information of the reel, so that the gluing machine is stabilized at the set position of the guide mechanism before performing the gluing operation.

[0007] In one embodiment, the gluing machine includes a gluing roller, the axis of the gluing roller is parallel to the axis of the winding shaft, and the line connecting the center of the gluing roller and the center of the winding shaft is parallel to the guiding direction of the guide mechanism.

[0008] In one embodiment, there are two winding shafts, which are spaced apart and used to alternately wind up the electrode sheet. A cutting moving mechanism is further provided between the two winding shafts, and the cutting moving mechanism is used to move the cutting mechanism between the two winding shafts. The cutting mechanism includes a swing arm, the swinging plane of the swing arm is perpendicular to the axis of the winding shaft; the end of the swing arm is provided with a traction roller and a cutter. When one of the winding shafts completes winding, the cutting mechanism moves close to the other winding shaft. When the traction roller pulls the pole piece into contact with the other winding shaft, the position of the cutter relative to the pole piece is the cutting point.

[0009] In one embodiment, it further includes a support roller disposed between the two winding rollers for supporting the pole piece below the pole piece, and the highest point of the support roller is higher than the lowest point of the outer surface of the winding shaft coil.

[0010] A second aspect of the present application provides a method for controlling the gluing of a pole piece winding device as described in the first aspect, comprising: Controlling the winding shaft to wind the electrode piece, and when the winding diameter reaches a set threshold, controlling the cutting mechanism to cut the electrode piece at a set cutting point on the electrode piece path; Based on the pole piece length information from the cutting point to the gluing point, the winding shaft is controlled to rotate a distance corresponding to the length information; When the reel rotates to a distance corresponding to the pole piece length information, the gluing mechanism is controlled to perform a gluing operation.

[0011] In one embodiment, the control of the winding shaft to wind the electrode sheet, and when the winding diameter reaches a set threshold, the control of the cutting mechanism to cut the electrode sheet at a cutting point set on the electrode sheet path includes: Controlling one of the winding shafts to wind the electrode sheet, and when the winding diameter reaches a set threshold, controlling the traction roller of the swing arm of the cutting mechanism to contact the other winding shaft, determining the cutting point when the traction roller contacts the other winding shaft, and controlling the cutter to cut the electrode sheet at the cutting point; The controlling the winding shaft to rotate a distance corresponding to the length information based on the pole piece length information from the cutting point to the gluing point includes: Calculate the length of the straight segment of the pole piece between the cutting point and the gluing point that overhangs the winding shaft, and calculate the length of the arc segment of the pole piece between the cutting point and the gluing point along the winding shaft; control the winding shaft to rotate by a distance corresponding to the sum of the arc segment length and the straight segment length; or, The step of controlling the glue sticking mechanism to perform the glue sticking operation when the reeling shaft rotates to the distance includes: When the reel rotates to a distance corresponding to the sum of the straight line segment length and the arc segment length, the gluing machine is controlled to move to a set position and perform a gluing operation based on the real-time roll diameter information.

[0012] In one embodiment, the calculation of the length of the straight segment of the pole piece between the cutting point and the gluing point overhanging the winding shaft includes: Obtain the first pole piece length between the cutting point and the support roller, and calculate the second pole piece length between the support roller and the pole piece tangent point on the winding shaft, and obtain the straight line segment length according to the sum of the first pole piece length and the second pole piece length.

[0013] In one embodiment, the calculating of the second pole piece length between the support roller and the pole piece tangent point on the winding shaft includes: Obtain the straight-line distance between the center point of the support roller and the center point of the winding shaft; determining a tangent angle based on a ratio of the coil radius to the straight-line distance; The second pole piece length is obtained according to a functional relationship between the tangent point angle and the straight-line distance.

[0014] In one embodiment, the calculating of the arc segment length of the pole piece between the cutting point and the gluing point along the winding axis includes: The corresponding central angle is determined according to the position of the glue point and the position of the electrode tangent point; the corresponding circumferential arc length is calculated based on the central angle and the coil radius of the winding shaft, and the arc segment length of the electrode along the winding shaft is obtained according to the circumferential arc length.

[0015] The technical solution provided by this application may have the following beneficial effects: According to the technical solution of the present application, the control module can accurately control the rotation distance of the winding shaft based on the total length of the pole piece from the cutting point to the gluing point, so that the cutting point of the pole piece is automatically positioned to the gluing point, and then the gluing mechanism is controlled to perform the gluing operation. This can improve the efficiency of gluing positioning, avoid the complex structure of the traditional visual positioning system, reduce equipment costs and improve positioning reliability.

[0016] Furthermore, the technical solution of this application, with its dual reel design and cutting mechanism, enables seamless workstation switching. A linear module drives the swing arm to precisely position the target reel, eliminating the space wasted in traditional equipment layouts. The swing arm's perpendicular pivoting design ensures that the traction roller and cutter are always aligned with the center of the web, minimizing the angular deviation between the cutting point and the web surface and ensuring cutting accuracy.

[0017] Furthermore, the technical solution of the present application can dynamically calculate the gluing position based on the geometric relationship of the cutting point, and combine the precise control of the rotation distance of the reel and the movement feedback of the gluing mechanism to realize automatic positioning from the cutting point to the gluing point. It replaces the visual inspection system of related technologies through trigonometric functions and arc length calculations, while avoiding the hardware costs of cameras and light sources, avoiding the debugging complexity and space occupation of visual positioning, and can significantly improve the gluing efficiency.

[0018] 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

[0019] The above and other objects, features and advantages of the present application will become more apparent by describing in more detail 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.

[0020] Figure 1 This is a schematic diagram of the process of a pole piece winding device shown in one embodiment of the present application; Figure 2 1 is a schematic diagram of the angle of the winding shaft of the pole piece winding device shown in one embodiment of the present application; Figure 3 This is a flow chart of a method for controlling glue application according to an embodiment of the present application; Figure 4 It is a flow chart of a glue application control method shown in another embodiment of the present application.

[0021] Figure numerals: 100, pole piece winding device; 110, winding shaft; 111, coil; 101, pole piece; 120, cutting mechanism; 121, cutting movement mechanism; 122, swing arm; 123, traction roller; 124, cutter; 130, gluing mechanism; 131, guide mechanism; 132, gluing machine; 133, roll diameter detection sensor; 140, support roller; P1, cutting point; P2, gluing point; P3, pole piece cutting point; P4, support point. DETAILED DESCRIPTION

[0022] The following describes embodiments of the present application in more detail with reference to the accompanying drawings. Although the accompanying drawings illustrate embodiments of the present application, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. Rather, 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.

[0023] 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.

[0024] 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.

[0025] In related technologies, the tail glue application operation generally requires visual inspection. For example, an image acquisition device and auxiliary light source are required next to the labeling machine to detect the tail glue cutting position. The complex structure takes up a lot of space, requires a lot of maintenance work, and also leads to increased costs. To address the above problems, the embodiments of the present application provide a pole piece winding device and a glue application control method, which can improve the efficiency of glue application positioning, avoid the complex structure of traditional visual positioning systems, reduce equipment costs, and improve positioning reliability.

[0026] The technical solutions of the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0027] Figure 1 It is a flow chart of a pole piece winding device shown in one embodiment of the present application.

[0028] See also Figure 1The present application provides a pole piece winding device 100, which includes a winding shaft 110, a cutting mechanism 120, a gluing mechanism 130 and a control module; the winding shaft 110 is used to wind the pole piece 101, and the cutting mechanism 120 is arranged at a predetermined position of the transmission path of the pole piece 101. When the winding diameter of the winding shaft 110 reaches a set threshold value, the pole piece 101 is cut off at the cutting point P1 set on the path of the pole piece 101; the gluing mechanism is arranged adjacent to the winding shaft 110, and is used to fix the tail end of the pole piece 101 to the main body of the coil 111; the control module is electrically connected to the winding shaft 110, the cutting mechanism 120 and the gluing mechanism, and is used to control the winding shaft 110 to rotate a distance corresponding to the length information based on the length information of the pole piece 101 from the cutting point P1 to the gluing point P2, and control the gluing mechanism to perform the gluing operation when it rotates to the distance.

[0029] In this embodiment, the reel 110 is mounted horizontally on the equipment frame, and the cutter 124 of the cutting mechanism 120 is located at a predetermined position above and to the side of the reel; when the roll diameter meets the threshold, the control module triggers the cutter 124 to cut the electrode 101 at the cutting point P1. The gluing roller of the gluing mechanism 130 is arranged parallel to the reel 110. After calculating the total length L of the electrode 101 from the cutting point P1 to the gluing point P2, the control module drives the reel 110 to rotate the corresponding distance so that the cutting point P1 reaches the gluing point P2. Then, the gluing roller is controlled to approach the surface of the coiled material of the reel, and the tail end of the cut electrode piece is glued to the coiled material 111 to fix the tail end of the electrode piece.

[0030] This application precisely controls the rotation distance of the winding shaft based on the total length of the pole piece from the cutting point to the gluing point, so that the cutting point of the pole piece is automatically positioned to the gluing point, and then the gluing mechanism is controlled to perform the gluing operation. This can improve the efficiency of gluing positioning, avoid the complex structure of the traditional visual positioning system, reduce equipment costs and improve positioning reliability.

[0031] In some embodiments, the pole piece winding device 100 further includes a roll diameter detection sensor 133, which is electrically connected to the control module. The roll diameter detection sensor 133 is disposed adjacent to the winding shaft 110, for example, the roll diameter detection sensor is fixed to the gluing machine, and is used to provide real-time feedback on changes in the roll diameter of the winding shaft 110. The control module can control the guide mechanism 131 to stop moving based on the roll diameter information detected by the roll diameter detection sensor 133, so that the gluing machine 132 stabilizes at a set position before performing the gluing operation, dynamically compensates for the offset of the gluing position under different roll diameters, solves the problem of insufficient pressure caused by the increase in roll diameter in traditional fixed-position gluing, and improves the firmness of the gluing.

[0032] See also Figure 1 , Figure 1The left reel shows coils of different diameters, namely a solid coil and a dotted coil. The coil diameter detection sensor 133 can detect different coil diameters in real time. The present invention uses the parameters of a solid coil as an example. The radius R is the radius of the solid coil, and ∅ is the diameter of the solid coil.

[0033] In some embodiments, the gluing mechanism 130 includes a driving member, a guide mechanism 131 and a gluing machine 132; the driving member is used to drive the gluing machine 132 to move along the guide mechanism 131, and the guide mechanism 131 is used to guide the gluing machine 132 to move in a direction perpendicular to the winding shaft 110; the control module is also used to control the operating state of the driving member according to the winding diameter information of the winding shaft 110, so that the gluing machine 132 is stabilized at the set position of the guide mechanism 131 before performing the gluing operation.

[0034] The guide mechanism 131 can be a screw or linear guide, and the drive element can be a motor. The gluing machine 132 is mounted on the guide mechanism 131 via a slider. The control module controls the drive element to move the gluing machine 132 perpendicularly to the reel 110 based on the real-time reel diameter of the reel 110. When the reel diameter detection sensor 133 contacts the surface of the web 111, the gluing machine 132 immediately stops moving, stabilizing the gluing machine 132 in the set position. The vertical movement design of the guide mechanism 131 and the drive element, combined with closed-loop control of reel diameter feedback, ensures that the gluing machine 132 accurately adapts to the surface position of webs 111 with different reel diameters, preventing gluing deviation.

[0035] In this embodiment, the gluing machine 132 includes a gluing roller, the axis of which is parallel to the axis of the take-up shaft 110, and the line connecting the center of the gluing roller and the center of the take-up shaft 110 is parallel to the guiding direction of the guide mechanism 131, that is, the line connecting the center of the gluing roller and the center of the take-up shaft 110 is parallel to the moving direction of the gluing machine 130, and the moving direction is perpendicular to the axis of the take-up shaft. The gluing roller of the gluing machine 132 can be installed parallel to the take-up shaft 110 through a bearing seat, and the line connecting its center point and the center of the take-up shaft 110 is parallel to the extension direction of the guide rail of the guide mechanism 131. The surface of the gluing roller can be coated with a pressure-sensitive adhesive layer, and is driven by a cylinder to vertically press the roll 111. In this embodiment, by designing the parallel axis and the center line in the same direction, the gluing roller is always facing the center of the roll 111 during movement, avoiding the problem of loose tail glue due to angle deviation.

[0036] Continue to see Figure 1In some embodiments, two winding shafts 110 are provided, and the two winding shafts 110 are spaced apart in the horizontal direction and installed parallel to the frame; the two winding shafts 110 are used to alternately reel up the pole piece 101; wherein, it also includes a cutting moving mechanism 121 arranged between the two winding shafts 110, and the cutting moving mechanism 121 is used to move the cutting mechanism 120 between the two winding shafts 110; the cutting mechanism 120 includes a swing arm 122, and the swinging plane of the swing arm 122 is perpendicular to the axis of the winding shaft 110; the end of the swing arm 122 is provided with a traction roller 123 and a cutter 124, when one of the winding shafts 110 completes winding, the cutting mechanism 120 moves close to the other winding shaft 110, and when the traction roller 123 pulls the pole piece 101 into contact with the other winding shaft 110, the position of the cutter 124 relative to the pole piece 101 is the cutting point P1.

[0037] The cutting movement mechanism 121 can be a linear module that spans over the two winding shafts 110. A swing arm 122 is vertically mounted on the module slider via a slewing bearing. A traction roller 123 and a pneumatic cutter 124 are mounted at the end of the swing arm 122. When the left winding shaft 110 is full of coils, the linear module drives the swing arm 122 to move rightward to above the empty right winding shaft 110. The swing arm 122 swings downward, pressing the traction roller 123 against the surface of the empty winding shaft. The tension generated by the pulling pole piece 101 triggers the cutter 124 to cut. At this point, the contact point between the cutter 124 and the pole piece 101 is the cutting point P1.

[0038] In this embodiment, the cutter 124 is located on the downstream side of the contact point between the traction roller 123 and the empty winding shaft 110 in the transmission path direction of the pole piece 101. When the cutter 124 cuts off the pole piece 101, the traction roller 123 fixes the end of the upstream pole piece 101 to the empty winding shaft 110, which is convenient for the splicing or winding operation of the next process.

[0039] In some embodiments, the pole piece winding device 100 further includes a support roller 140 disposed between the two winding rollers, for supporting the pole piece 101 below the pole piece 101. The support surface of the support roller 140 is higher than the lowest point of the winding shaft 110 when winding is completed. The support roller 140 is installed below the center of the two winding shafts 110 via a bracket. The roller surface height is higher than the lowest point of the winding shaft 110 cylinder, forming an arc-shaped support surface to support the pole piece 101. The surface of the support roller 140 can be covered with an elastic silicone layer to form a flexible contact support with the upper pole piece 101. The high-position support design of the support roller 140 provides stable support for the suspended pole piece 101 during reeling. The high-position design of the support roller 140 forms a dynamic protective isolation zone, which reliably supports the suspended pole piece 101 during reeling, avoiding the risk of the cutter 124 and other mechanisms scratching the pole piece 101 during the movement of the swing arm 122.

[0040] In this application, the dual reel 110 design, combined with the cutting movement mechanism 121, enables seamless workstation switching. A linear module drives the swing arm 122 to precisely position the target reel 110, eliminating the space waste associated with traditional equipment layouts. The swing arm 122's perpendicular pivoting design ensures that the traction roller 123 and cutter 124 always face the center of the web 111, minimizing the angular deviation between the cutting point P1 and the surface of the web 111 and ensuring cutting accuracy.

[0041] The above describes the pole piece winding device of the present application. Accordingly, the present application also provides a glue application control method, which is applied to the pole piece winding device of any of the above embodiments.

[0042] Figure 3 It is a flow chart of a method for controlling glue application according to an embodiment of the present application.

[0043] See also Figure 3 The glue control method provided in this application includes the following steps: S110 , controlling the winding shaft to wind the electrode piece, and when the winding diameter reaches a set threshold, controlling the cutting mechanism to cut the electrode piece at a set cutting point on the electrode piece path.

[0044] In this step, the control module monitors the winding diameter of the winding shaft 110 in real time, and when it reaches a set threshold (such as φ300mm), the cutting mechanism 120 is triggered to cut the electrode 101 at a predetermined cutting point P1.

[0045] S120 , based on the length information of the electrode from the cutting point to the gluing point, control the winding shaft to rotate a distance corresponding to the length information.

[0046] In this step, based on the total length L of the pole piece 101 from the cutting point P1 to the gluing point P2, the angular displacement θ=L / R (R is the real-time radius of the coil 111) of the reel 110 is calculated.

[0047] S130 , when the reel rotates to a distance corresponding to the pole piece length information, controlling the gluing mechanism to perform a gluing operation.

[0048] In this step, after the reel 110 is driven to rotate by an angle θ, the glue sticking mechanism is immediately started to perform the glue sticking operation.

[0049] The solution of this application triggers precise control of cutting and rotation distance by the roll diameter, realizes automatic positioning of the cutting point to the gluing position, replaces the traditional visual positioning system, can significantly reduce system complexity and control delay, and at the same time can reduce costs and reduce maintenance workload.

[0050] Figure 4 It is a flow chart of a glue application control method shown in another embodiment of the present application.

[0051] See also Figure 4 More specifically, the glue control method of the present application includes the following steps: S210, control one of the winding shafts to wind up the electrode sheet, and when the winding diameter reaches a set threshold, control the traction roller of the swing arm of the cutting mechanism to contact the other winding shaft, determine the cutting point when the traction roller contacts the other winding shaft, and control the cutter to cut the electrode sheet at the cutting point.

[0052] In this embodiment, there are two reeling shafts 110, which are spaced apart in the horizontal direction and installed in parallel with the frame; the two reeling shafts 110 are used to alternately reel the pole piece 101; wherein, a cutting moving mechanism 121 is also included between the two reeling shafts 110, and the cutting moving mechanism 121 is used to move the cutting mechanism 120 between the two reeling shafts 110. S220, obtain the first pole piece length between the cutting point and the support roller; and obtain the straight-line distance between the center point P4 of the support roller and the center point O of the winding shaft, determine the tangent angle based on the ratio of the coil radius and the straight-line distance, and obtain the second pole piece length according to the functional relationship between the tangent angle and the straight-line distance; obtain the straight line segment length according to the sum of the first pole piece length and the second pole piece length.

[0053] In this step, the length of the first pole piece 101 is the straight-line distance B from the cutting point P1 to the center P4 of the support roller 140, which can be fixedly stored through mechanical installation position parameters. The length of the second pole piece 101 is the dynamic distance C from the center P4 of the support roller 140 to the tangent point P3 of the coil 111. In this application, the tangent point P3 is the point where the pole piece is tangent to the winding shaft. Specifically, see Figure 1 and Figure 2 To calculate the length C of the second pole piece 101, first obtain the straight-line distance A from the center P4 of the support roller 140 to the center O of the winding shaft 110. This straight-line distance can be a mechanically fixed value. Then, calculate the angle of the pole piece tangent point P3 using the formula α=arccos(R / A) (R is the actual winding diameter). Finally, substitute the trigonometric function formula C=A×sin(α) to obtain the numerical value of the length of the second pole piece 101. Therefore, the straight-line segment length L1 in this application is B+C = B+A×sin(a).

[0054] This embodiment uses the center P4 of the support roller 140 as an intermediate calculation node to decompose the overhanging pole piece 101 into two linear distances that can be quantified and measured, thereby improving the engineering feasibility and accuracy of the length calculation.

[0055] S230. Determine the corresponding central angle according to the position of the glue application point and the position of the electrode tangent point P3, calculate the corresponding circumferential arc length based on the central angle and the coil radius of the winding shaft, and obtain the arc segment length of the electrode along the winding shaft according to the circumferential arc length.

[0056] In this step, continue to see Figure 1 and Figure 2 Based on the real-time angle of tangent point P3, the corresponding central angle c = 360 - da is calculated between tangent point P3 and gluing point P2. d is the central angle between gluing point P2 and center point P4 of support roller 140, and a is the central angle between center point P4 of support roller 140 and pole piece tangent point P3. The arc length L2 from pole piece tangent point P3 to gluing point P2 can be calculated as ((π × 2 × R) / 360) × c = ((π × 2 × R) / 360) × (360 - da), where R is updated in real time by roll diameter detection sensor 133.

[0057] S240 , controlling the reel shaft to rotate by a distance corresponding to the sum of the arc segment length and the straight segment length.

[0058] In this step, based on step S230, the distance that the winding shaft 110 needs to travel is L=L1+L2=B+A×sin(a)+((π×2×R) / 360)×(360-da). The control module controls the number of rotations of the servo motor of the winding shaft 110 n=L / (2πR) through a pulse signal, so that the moving distance of the surface of the coil 111 is exactly equal to L.

[0059] This embodiment dynamically calculates arc length based on the central angle of the winding shaft 110, adaptively compensating for the effect of varying roll diameter on the gluing position, ensuring consistent positioning of the gluing point P2 under varying roll diameters. By separately calculating the lengths of straight and arc segments, the spatial configuration of the pole piece 101 is fully considered, ensuring that the calculated rotational distance fully matches the actual path of the coil 111, eliminating positioning deviations caused by path simplification.

[0060] S250 , when the reel rotates to a distance corresponding to the sum of the straight line segment length and the arc segment length, controlling the gluing machine to move to a set position based on the real-time roll diameter information and performing a gluing operation.

[0061] In this step, when the reel 110 rotates so that the cutting point P1 reaches the gluing position, the control guide mechanism 131 drives the gluing machine 132 to move in a direction parallel to the line connecting the center of the gluing roller and the center of the reel 110. The roll diameter detection sensor 133 on the gluing machine 132 detects the contact status of the surface of the web 111 in real time. When the sensor detects that it is in contact with the surface of the web 111, the movement of the gluing machine 132 is immediately stopped, and the gluing machine 132 is then triggered to perform the tail gluing operation. The gluing operation is triggered by contact detection, which avoids the visual positioning system while ensuring precise contact between the gluing roller and the surface of the web 111. This eliminates the problem of insufficient gluing pressure or offset caused by changes in roll diameter, significantly improving the reliability and automation of gluing.

[0062] In some embodiments, the method of the present application further includes: inversely calculating the real-time roll diameter information of the reel 110 based on the fixed distance from the initial position of the gluing machine 132 to the reel 110 and the travel distance of the gluing machine 132. The vertical distance from the initial position of the gluing machine 132 to the center of the reel 110 can be pre-stored in the control module. As the gluing machine 132 moves toward the reel 110, the lead screw travel distance is recorded in real time. When the roll diameter detection sensor 133 contacts the surface of the web 111, the real-time roll diameter is inferred based on the geometric relationship. This achieves adaptive compensation for the size of the web 111 while ensuring accuracy while eliminating sensor installation space and maintenance costs.

[0063] The solution of this embodiment uses a glue positioning algorithm that does not require visual inspection to dynamically calculate the glue position based on the geometric relationship of the cutting points, and combines the precise control of the rotation distance of the reel and the movement feedback of the glue mechanism to achieve fully automatic positioning from the cutting point to the glue point; this method replaces the visual inspection system of related technologies with trigonometric functions and arc length calculations, while avoiding the hardware costs of cameras and light sources, and avoiding the debugging complexity and space occupation of visual positioning, which can significantly improve the glue sticking efficiency and equipment reliability.

[0064] The embodiments of the present application have been described above. The above description is exemplary, 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 pole piece winding device, characterized in that: include: Reeling shaft, used to reel in the pole piece; A cutting mechanism is provided at a predetermined position on the electrode transmission path, and when the winding diameter of the reel reaches a set threshold, the electrode is cut off at a cutting point set on the electrode path; A gluing mechanism, disposed adjacent to the reel, for fixing the tail end of the pole piece to the coil body; The control module is electrically connected to the reel, the cutting mechanism and the gluing mechanism. It is used to control the winding shaft to rotate a distance corresponding to the length information based on the pole piece length information from the cutting point to the gluing point, and control the gluing mechanism to perform the gluing operation when rotating to the distance.

2. The pole piece winding device according to claim 1, characterized in that: The gluing mechanism includes a driving member, a guide mechanism and a gluing machine; the driving member is used to drive the gluing machine to move along the guide mechanism, and the guide mechanism is used to guide the gluing machine to move in a direction perpendicular to the winding shaft; The control module is further configured to control the operating state of the driving member according to the winding diameter information of the reel, so that the gluing machine is stabilized at the set position of the guide mechanism before performing the gluing operation.

3. The pole piece winding device according to claim 2, characterized in that: The glue sticking machine includes a glue sticking roller, the axis of the glue sticking roller is parallel to the axis of the winding shaft, and the line connecting the center of the glue sticking roller and the center of the winding shaft is parallel to the guiding direction of the guide mechanism.

4. The pole piece winding device according to claim 1, characterized in that: There are two winding shafts, which are spaced apart and used to alternately wind up the pole piece; wherein, a cutting moving mechanism is provided between the two winding shafts, and the cutting moving mechanism is used to move the cutting mechanism between the two winding shafts; The cutting mechanism includes a swing arm, the swinging plane of the swing arm is perpendicular to the axis of the winding shaft; the end of the swing arm is provided with a traction roller and a cutter. When one of the winding shafts completes winding, the cutting mechanism moves close to the other winding shaft. When the traction roller pulls the pole piece into contact with the other winding shaft, the position of the cutter relative to the pole piece is the cutting point.

5. The pole piece winding device according to claim 4, characterized in that: Also includes: The support roller provided between the two winding rollers is used to support the pole piece below the pole piece, and the highest point of the support roller is higher than the lowest point of the outer surface of the winding shaft coil.

6. A method for controlling the gluing of a pole piece winding device according to any one of claims 1 to 5, characterized in that: include: Controlling the winding shaft to wind the electrode piece, and when the winding diameter reaches a set threshold, controlling the cutting mechanism to cut the electrode piece at a set cutting point on the electrode piece path; Based on the pole piece length information from the cutting point to the gluing point, the winding shaft is controlled to rotate a distance corresponding to the length information; When the reel rotates to a distance corresponding to the pole piece length information, the gluing mechanism is controlled to perform a gluing operation.

7. The method according to claim 6, characterized in that The control of the winding shaft to wind the electrode sheet, and when the winding diameter reaches a set threshold, controlling the cutting mechanism to cut the electrode sheet at a cutting point set on the electrode sheet path, includes: Controlling one of the winding shafts to wind the electrode sheet, and when the winding diameter reaches a set threshold, controlling the traction roller of the swing arm of the cutting mechanism to contact the other winding shaft, determining the cutting point when the traction roller contacts the other winding shaft, and controlling the cutter to cut the electrode sheet at the cutting point; The controlling the winding shaft to rotate a distance corresponding to the length information based on the pole piece length information from the cutting point to the gluing point includes: Calculate the length of the straight segment of the pole piece between the cutting point and the gluing point that overhangs the winding shaft, and calculate the length of the arc segment of the pole piece between the cutting point and the gluing point along the winding shaft; control the winding shaft to rotate by a distance corresponding to the sum of the arc segment length and the straight segment length; or, The step of controlling the glue sticking mechanism to perform the glue sticking operation when the reeling shaft rotates to the distance includes: When the reel rotates to a distance corresponding to the sum of the straight line segment length and the arc segment length, the gluing machine is controlled to move to a set position and perform a gluing operation based on the real-time roll diameter information.

8. The method according to claim 7, characterized in that The calculation of the straight line length of the pole piece between the cutting point and the gluing point overhanging the winding shaft includes: Obtain the first pole piece length between the cutting point and the support roller, and calculate the second pole piece length between the support roller and the pole piece tangent point on the winding shaft, and obtain the straight line segment length according to the sum of the first pole piece length and the second pole piece length.

9. The method according to claim 8, characterized in that The calculating of the second pole piece length between the support roller and the pole piece tangent point on the winding shaft includes: Obtain the straight-line distance between the center point of the support roller and the center point of the winding shaft; determining a tangent angle based on a ratio of a coil radius to the straight line distance; The second pole piece length is obtained according to a functional relationship between the tangent point angle and the straight-line distance.

10. The method according to claim 7, characterized in that The calculating of the arc segment length of the electrode between the cutting point and the gluing point along the winding axis includes: The corresponding central angle is determined according to the position of the glue point and the position of the electrode tangent point; the corresponding circumferential arc length is calculated based on the central angle and the coil radius of the winding shaft, and the arc segment length of the electrode along the winding shaft is obtained according to the circumferential arc length.

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