Winding apparatus and method

Abstract

The application relates to the technical field of batteries, and discloses a winding device and method, which comprises a cutter mechanism, a winding mechanism and a processor, the cutter mechanism comprises a cutter and a cutter deviation rectifying mechanism; the cutter is used for cutting an electrode sheet when the winding mechanism winds the electrode sheet into a bare battery cell; the processor is used for calculating a cutter deviation rectifying compensation value of the cut electrode sheet and sending the cutter deviation rectifying compensation value to the cutter deviation rectifying mechanism; the cutter deviation rectifying mechanism is used for rectifying the cut electrode sheet according to the cutter deviation rectifying compensation value; and the winding mechanism is used for winding the rectified electrode sheet. Since the cutter deviation rectifying mechanism is arranged in the cutter mechanism, and the cut electrode sheet is rectified by the cutter deviation rectifying mechanism based on the cutter deviation rectifying compensation value, the tail part of the electrode sheet can be effectively rectified in the winding process, and the tail part of the electrode sheet can be prevented from swinging.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and more specifically to a winding device and method. Background Technology

[0002] Currently, in the winding process, the tail of the electrode sheet is in an unconstrained state after being cut by the cutter. Affected by various factors such as the electrode sheet's own tension, gravity, and equipment vibration, its trajectory deviates. Since the tail of the electrode sheet has not yet entered the winding needle at this point, it cannot be effectively controlled, resulting in the tail of the electrode sheet swinging out. Summary of the Invention

[0003] In view of the above problems, the present invention provides a winding device and method, which aims to solve the problem that the tail of the electrode sheet is in an unconstrained state after being cut by the cutter during the winding process, resulting in the tail of the electrode sheet swinging out.

[0004] In a first aspect, the present invention provides a winding device, the winding device comprising: a cutting mechanism, a winding mechanism, and a processor, wherein the cutting mechanism comprises: a cutting blade and a cutting blade correction mechanism;

[0005] The cutter is used to cut the electrode sheet when the winding mechanism winds the electrode sheet into a bare cell;

[0006] The processor is used to calculate the cutter correction compensation value of the electrode sheet after cutting, and send the cutter correction compensation value to the cutter correction mechanism.

[0007] The cutting blade correction mechanism is used to correct the deviation of the cut electrode sheet according to the cutting blade correction compensation value;

[0008] The winding mechanism is used to wind up the corrected electrode sheet.

[0009] In the technical solution of this invention embodiment, by setting a cutting correction mechanism in the cutting mechanism, and correcting the electrode sheet after cutting based on the cutting correction compensation value, the tail of the electrode sheet can be effectively corrected in the winding process, thereby avoiding tail swing of the electrode sheet.

[0010] In some embodiments, the cutter correction mechanism includes: a cutter pressure roller and a guide roller, wherein the cutter pressure roller and the guide roller are disposed opposite to each other;

[0011] The cutting roller is used to press the electrode sheet onto the guide roller and moves according to the cutting correction compensation value to drive the guide roller and the cut electrode sheet to move, thereby correcting the deviation of the cut electrode sheet.

[0012] In the technical solution of this invention embodiment, the cutting correction mechanism includes a cutting pressure roller and a guide roller. The cutting pressure roller is used to press the electrode sheet onto the guide roller, thereby preventing the electrode sheet from detaching from the constraint and swinging freely after cutting, providing a stable force base for subsequent correction. The cutting pressure roller is also used to move according to the cutting correction compensation value, so as to drive the guide roller and the cut electrode sheet to move, thereby directly providing the power required for correction and ensuring that the electrode sheet can be corrected in position according to the correction compensation value.

[0013] In some embodiments, elastic reset devices are integrated at both ends of the roller;

[0014] The elastic reset device is used to move the guide roller and the cut electrode sheet based on the movement of the cutter pressure roller, so as to correct the deviation of the cut electrode sheet.

[0015] In the technical solution of this invention embodiment, elastic reset devices are integrated at both ends of the roller. The elastic reset devices are used to drive the roller and the cut electrode sheet to move based on the movement of the cutter pressure roller, thereby ensuring that the roller can move axially under the drive of the cutter pressure roller and can automatically return to the initial position after the correction is completed.

[0016] In some embodiments, the winding device further includes a needle winding turntable, on which a plurality of needle winding stations are provided, and the winding mechanism is disposed at one of the needle winding stations.

[0017] In the technical solution of this invention embodiment, the winding equipment also includes a needle winding turntable, which is provided with multiple needle winding stations. The winding mechanism is set on one of the needle winding stations, thereby providing a structural basis for the continuous production of the winding equipment, avoiding equipment downtime caused by station switching, and improving overall production efficiency.

[0018] In some embodiments, the winding device further includes a turret roller, which includes a plurality of rollers and rotates synchronously with the rotation of the needle winding turntable to coordinate with the switching action of the needle winding station.

[0019] In the technical solution of this invention embodiment, the winding equipment also includes a turret roller, which includes multiple rollers. The turret roller rotates synchronously with the rotation of the needle winding turntable to cooperate with the switching action of the needle winding station. This ensures that when the needle winding turntable switches stations, the new working station can immediately receive the electrode sheet with a roller, avoiding the electrode sheet transmission interruption caused by the switching of a single roller, and allowing the electrode sheet correction and winding process to proceed continuously.

[0020] In some embodiments, the turret roller is mounted on the needle winding turntable via a rotating support component and is connected to the needle winding turntable via a transmission component. The number of turret rollers is equal to the number of stations on the needle winding turntable.

[0021] In the technical solution of this invention embodiment, the turret roller is mounted on the needle winding turntable through a rotating support component and is connected to the needle winding turntable through a transmission component. The number of rollers on the turret roller is equal to the number of working positions on the needle winding turntable, thereby ensuring that the turret roller is stable and does not deviate during rotation, and achieving absolute synchronization with the turntable.

[0022] In some embodiments, the cutting mechanism is used to move from a preset cutting preparation position to a cutting working position corresponding to the electrode sheet;

[0023] The cutter pressure roller is used to extend from the cutter mechanism when the cutter mechanism moves to the cutting position, and press the electrode sheet onto the roller;

[0024] The cutting roller is used to retract the cutting mechanism after the winding mechanism has completed the winding of the electrode sheet after the correction.

[0025] The cutting mechanism is used to return from the cutting working position to the preset cutting preparation position when the cutting pressure roller is retracted.

[0026] In the technical solution of this invention embodiment, the cutter pressure roller retracts into the cutter mechanism after the correction is completed, and the cutter mechanism returns from the cutting working position to the preset cutting preparation position, thereby avoiding interference with subsequent processes and ensuring cyclic operation.

[0027] In some embodiments, the winding device further includes an image acquisition unit disposed between the cutter and the winding mechanism;

[0028] The image acquisition unit is used to acquire an image of the cut electrode sheet within the cut area and send the image of the cut electrode sheet to the processor, wherein the cut area is the area between the cutter and the winding mechanism;

[0029] The processor is further configured to determine the cutter correction compensation value of the cut electrode based on the electrode image, and send the cutter correction compensation value to the cutter correction mechanism.

[0030] In the technical solution of this invention embodiment, the winding device further includes an image acquisition unit. The image acquisition unit acquires the electrode offset of the cut electrode in the cutting area and determines the cutter correction compensation value based on the electrode offset. This enables accurate acquisition of the electrode offset in the cutting area and improves the accuracy of the cutter correction compensation value.

[0031] In some embodiments, the winding device further includes: a clamping and correction mechanism and a correction sensor;

[0032] The correction sensor is used to acquire the offset of the electrode wire before cutting and send the offset of the electrode wire to the processor;

[0033] The processor is further configured to calculate the clamping correction compensation value and the cutting correction compensation value based on the material line offset, and send the clamping correction compensation value to the clamping correction mechanism and the cutting correction compensation value to the cutting correction mechanism.

[0034] The clamping and correction mechanism is used to perform initial correction on the electrode sheet according to the clamping and correction compensation value.

[0035] In the technical solution of this invention embodiment, the winding equipment further includes a clamping and correction mechanism and a correction sensor. The correction sensor acquires the offset of the electrode line before cutting. The processor calculates the clamping correction compensation value and the cutting correction compensation value based on the offset of the electrode line. The clamping and correction mechanism performs the first correction of the electrode line based on the clamping correction compensation value. The cutting correction mechanism performs the second correction of the electrode line after cutting based on the cutting correction compensation value. This enables the second compensation correction of the part that cannot be completely corrected by the clamping correction, so that the anode tail can still be controlled by correction after cutting, ensuring the consistency of the anode tail with the material line in the process.

[0036] In some embodiments, the processor is further configured to, if the material line offset is greater than a preset threshold, use the preset threshold as a clamping correction compensation value, and determine a cutter correction compensation value based on the difference between the material line offset and the preset threshold.

[0037] The processor is further configured to use the material line offset as a clamping correction compensation value and the preset value as a cutting tool correction compensation value if the material line offset is less than or equal to a preset threshold.

[0038] In the technical solution of this invention embodiment, if the material line offset is greater than a preset threshold, the preset threshold is used as the clamping correction compensation value, and the cutter correction compensation value is determined based on the difference between the material line offset and the preset threshold; the processor is further configured to use the material line offset as the clamping correction compensation value and the preset value as the cutter correction compensation value if the material line offset is less than or equal to the preset threshold, thereby ensuring that the clamping correction amount is controlled within a reasonable range and maximizing the utilization of the clamping correction capability.

[0039] In some embodiments, the processor is further configured to calculate the difference between the material line offset and the preset threshold.

[0040] The processor is further configured to obtain the compensation coefficient for cutter deviation correction, and calculate the cutter deviation correction compensation value based on the difference and the compensation coefficient.

[0041] In the technical solution of this invention embodiment, the difference between the material line offset and the preset threshold is calculated, and the cutter correction compensation value is calculated based on the difference and the compensation coefficient, thereby adapting to different production conditions and improving the versatility of correction.

[0042] Secondly, the present invention provides a winding method, comprising:

[0043] When the electrode sheet is wound into a bare cell, the electrode sheet is cut off, and the cutting correction compensation value of the electrode sheet after cutting is calculated.

[0044] The cut electrode sheet is corrected according to the cutter correction compensation value, and then the corrected electrode sheet is wound up.

[0045] In the technical solution of this invention embodiment, when the electrode sheet is wound into a bare cell, the electrode sheet after cutting is corrected based on the cutting blade correction compensation value, so that the tail of the electrode sheet can be effectively corrected in the winding process, thereby avoiding tail swing of the electrode sheet.

[0046] In some embodiments, before calculating the cutter correction compensation value of the cut electrode sheet, the method further includes:

[0047] Obtain the electrode offset within the cutting area after cutting, and determine the cutter correction compensation value based on the electrode offset, wherein the cutting area is the region between the cutter location of the electrode and the winding location of the cut electrode.

[0048] In the technical solution of this invention embodiment, by obtaining the electrode offset in the cutting area after cutting, and determining the cutter correction compensation value based on the electrode offset, the electrode offset in the cutting area can be obtained, thereby improving the accuracy of the cutter correction compensation value.

[0049] In some embodiments, before calculating the cutter correction compensation value of the cut electrode sheet, the method further includes:

[0050] Obtain the offset of the electrode line before cutting;

[0051] Calculate the clamping correction compensation value and the cutting blade correction compensation value based on the material line offset;

[0052] The electrode is corrected according to the clamping correction compensation value.

[0053] In the technical solution of this invention, by obtaining the material line offset of the electrode sheet before cutting, calculating the clamping correction compensation value and the cutting correction compensation value based on the material line offset, performing the first correction on the electrode sheet based on the clamping correction compensation value, and performing the second correction on the electrode sheet after cutting based on the cutting correction compensation value, it is possible to perform a second compensation correction on the part that cannot be completely corrected by clamping correction, so that the anode tail can still be subject to correction control after cutting, ensuring the consistency between the anode tail and the material line in the process.

[0054] In some embodiments, calculating the clamping correction compensation value and the cutting blade correction compensation value based on the material line offset includes:

[0055] If the material line offset is greater than a preset threshold, the preset threshold is used as the clamping correction compensation value, and the cutter correction compensation value is determined based on the difference between the material line offset and the preset threshold.

[0056] If the material line offset is less than or equal to a preset threshold, the material line offset is used as the clamping correction compensation value, and the preset value is used as the cutting blade correction compensation value.

[0057] In the technical solution of this invention embodiment, if the material line offset is greater than a preset threshold, the preset threshold is used as the clamping correction compensation value, and the cutter correction compensation value is determined based on the difference between the material line offset and the preset threshold; the processor is further configured to use the material line offset as the clamping correction compensation value and the preset value as the cutter correction compensation value if the material line offset is less than or equal to the preset threshold, thereby ensuring that the clamping correction amount is controlled within a reasonable range and maximizing the utilization of the clamping correction capability.

[0058] In some embodiments, determining the cutter correction compensation value based on the difference between the material line offset and the preset threshold includes:

[0059] Calculate the difference between the material line offset and the preset threshold;

[0060] Obtain the compensation coefficient for cutter deviation correction, and calculate the cutter deviation correction compensation value based on the difference and the compensation coefficient.

[0061] In the technical solution of this invention embodiment, the difference between the material line offset and the preset threshold is calculated, and the cutter correction compensation value is calculated based on the difference and the compensation coefficient, thereby adapting to different production conditions and improving the versatility of correction.

[0062] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0063] Figure 1 This is a top view of a winding device according to some embodiments of the present invention;

[0064] Figure 2 This is a top view of a winding device according to some embodiments of the present invention;

[0065] Figure 3 The following are structural diagrams of the cutter correction mechanism according to some embodiments of the present invention;

[0066] Figure 4 This is a top view of a winding device according to some embodiments of the present invention;

[0067] Figure 5 This is a top view of a winding device according to some embodiments of the present invention;

[0068] Figure 6 This is a side view of a winding device according to some embodiments of the present invention;

[0069] Figure 7 This is a flowchart illustrating the correction process for some embodiments of the present invention;

[0070] Figure 8 This is a top view of a winding device according to some embodiments of the present invention;

[0071] Figure 9 This is a top view of a winding device according to some embodiments of the present invention;

[0072] Figure 10 This is a flowchart illustrating the correction process for some embodiments of the present invention;

[0073] Figure 11 This is a flowchart of a winding method according to some embodiments of the present invention;

[0074] Figure 12 This is a flowchart of a winding method according to some embodiments of the present invention;

[0075] Figure 13 This is a flowchart of a winding method according to some embodiments of the present invention.

[0076] The reference numerals in the detailed embodiments are as follows:

[0077] Cutting mechanism 10, cutter 11, cutter correction mechanism 12, cutter pressure roller 121, guide roller 122, elastic reset device 123, winding mechanism 20, processor 30, electrode sheet 40, winding needle turntable 50, first station 51, second station 52, third station 53, film rolling roller 60, turret guide roller 70, image acquisition device 80, cutting area 90, clamping correction mechanism 100, correction sensor 110. Detailed Implementation

[0078] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0079] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the invention, are intended to cover non-exclusive inclusion.

[0080] In the description of the embodiments of this invention, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this invention, "multiple" means two or more, unless otherwise explicitly defined.

[0081] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0082] In the description of the embodiments of this invention, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0083] In the description of the embodiments of the present invention, the term "multiple" refers to two or more (including two), similarly, "multiple groups" refers to two or more (including two groups), and "multiple pieces" refers to two or more (including two pieces).

[0084] In the description of the embodiments of the present invention, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0085] In the description of the embodiments of this invention, unless otherwise explicitly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this invention according to the specific circumstances. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0086] Currently, judging from market trends, battery applications are becoming increasingly widespread. Batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of battery applications, market demand is also constantly increasing.

[0087] In the winding process of lithium battery production, the tail of the electrode is in an unconstrained state after being cut by the cutter. Affected by factors such as the electrode's own tension, gravity, and equipment vibration, its trajectory deviates. Since the tail of the electrode has not yet entered the winding needle at this time, it cannot be effectively controlled, resulting in the tail of the electrode swinging out.

[0088] To address the issue of electrode tails becoming unrestrained after being cut by the cutter during the winding process, leading to tail swing, a cutter correction mechanism can be incorporated into the cutter mechanism. Based on the cutter correction compensation value, this mechanism corrects the deviation of the cut electrode tail during the winding process, thereby preventing tail swing.

[0089] In some embodiments, a winding apparatus is provided, comprising: a cutting mechanism, a winding mechanism, and a processor; the cutting mechanism includes a cutter and a cutter correction mechanism; the cutter is used to cut the electrode sheet when the winding mechanism winds the electrode sheet into a bare cell; the processor is used to calculate a cutter correction compensation value for the cut electrode sheet and send the cutter correction compensation value to the cutter correction mechanism; the cutter correction mechanism is used to correct the deviation of the cut electrode sheet according to the cutter correction compensation value; and the winding mechanism is used to wind the corrected electrode sheet.

[0090] For ease of understanding, please refer to Figure 1 This explanation is provided, but does not limit the scope of this application. Figure 1 This is a top view of a winding apparatus according to some embodiments of the present invention. As an example, such as... Figure 1 As shown, the winding device includes a cutting mechanism 10, a winding mechanism 20, and a processor 30. The cutting mechanism 10 includes a cutter 11 and a cutter correction mechanism 12.

[0091] The winding equipment refers to continuous winding equipment used in the battery field, specifically used to wind anode plates, cathode plates, and separators to form bare cells, enabling integrated operations of plate cutting, deviation compensation, and winding. The cutting mechanism 10 refers to the component in the winding equipment responsible for plate cutting and tail deviation correction, including a cutter 11 and a cutter deviation correction mechanism 12, capable of clamping, pressing, cutting, and deviation correction of the plates. The cutter 11 is used to precisely cut the plates 40 (such as anode plates) after the winding mechanism 20 completes the bare cell winding process, achieving plate separation between the front and rear cells. The cutter deviation correction mechanism 12 refers to the component in the cutting mechanism 10 responsible for tail deviation correction of the plates, controlled by the processor 30, and can compensate for the offset of the cut plate tail. In specific implementations, the cutter deviation correction mechanism 12 can be a correction roller, or it can include a cutter pressure roller and a guide roller, with the cutter pressure roller and guide roller arranged opposite to each other; this embodiment does not limit this. The winding mechanism 20 can refer to the core winding component of the winding equipment, including components such as winding needles, used to drive the electrode sheet 40 to wind into a bare cell, and can complete the winding of the electrode sheet 40 after correction. The processor 30 can refer to the control core of the winding equipment, which can receive sensor data, calculate the cutter correction compensation value of the electrode sheet after cutting, and send control commands to the cutter correction mechanism 12. The bare cell can refer to the semi-finished cell that has not undergone subsequent packaging, liquid injection, or other processes after the anode electrode sheet, cathode electrode sheet, and separator have been wound into shape by the winding mechanism. The cutter correction compensation value can refer to the correction parameters calculated by the processor 30 based on the actual offset of the anode tail, used to guide the movement distance of the cutter correction mechanism 12.

[0092] In practical implementation, during the stage where the winding mechanism winds the electrode sheet and separator to form the bare cell (after the cathode electrode sheet is finished and the winding needle station is switched into position), the cutting mechanism first extends to clamp the anode electrode sheet and press it firmly. Then, the cutter precisely cuts the electrode sheet, completing the electrode separation between the front and rear cells. The processor first calculates the cutting correction compensation value and then sends the cutting correction compensation value to the cutting correction mechanism in real time. After receiving the compensation value, the cutting correction mechanism corrects the tail of the cut electrode sheet. After the cutting correction mechanism completes the correction, the winding needle of the winding mechanism rotates, driving the corrected tail of the electrode sheet to be wound up. At the same time, in conjunction with the separator winding and adhesive application processes, the bare cell is wound and formed.

[0093] This embodiment sets up a cutting correction mechanism in the cutting mechanism, and corrects the deviation of the cut electrode sheet by the cutting correction mechanism based on the cutting correction compensation value. This enables effective correction of the tail of the electrode sheet in the winding process, thereby preventing the tail of the electrode sheet from swinging out.

[0094] In some embodiments, the cutting correction mechanism includes a cutting pressure roller and a guide roller, wherein the cutting pressure roller and the guide roller are disposed opposite to each other; the cutting pressure roller is used to press the electrode sheet onto the guide roller and move according to the cutting correction compensation value, so as to drive the guide roller and the cut electrode sheet to move, thereby correcting the deviation of the cut electrode sheet.

[0095] To provide a stable force base for subsequent correction and ensure that the electrode sheet can be corrected in position according to the correction compensation value, in this embodiment, the cutting correction mechanism includes a cutting pressure roller and a guide roller. The cutting pressure roller is used to press the electrode sheet onto the guide roller to prevent the electrode sheet from detaching from the constraint and swinging freely after cutting, thus providing a stable force base for subsequent correction. The cutting pressure roller is also used to move according to the cutting correction compensation value to drive the guide roller and the cut electrode sheet to move, thereby directly providing the power required for correction and ensuring that the electrode sheet can be corrected in position according to the correction compensation value.

[0096] For ease of understanding, please refer to Figure 2 This explanation is provided, but does not limit the scope of this application. Figure 2 This is a top view of a winding apparatus according to some embodiments of the present invention. As an example, such as... Figure 2 As shown, the cutter correction mechanism 12 includes: a cutter pressure roller 121 and a guide roller 122.

[0097] The cutter pressure roller 121 can be considered the active actuator in the cutter correction mechanism 12. It has a roller-like structure and can extend, retract, and move axially. It presses the electrode 40 onto the guide roller 122 and simultaneously generates displacement based on the cutter correction compensation value, causing the guide roller 122 and the electrode 40 to move synchronously to achieve correction. The guide roller 122 can be considered the driven component of the cutter correction mechanism 12. It can reciprocate under the drive of the cutter pressure roller 121, and simultaneously provides support and positioning for the electrode 40.

[0098] In a specific implementation, elastic reset devices can be integrated at both ends of the roller, or a motor can be integrated at one or both ends of the roller to enable the roller to move synchronously with the cutter pressure roller. This embodiment does not impose any restrictions on this.

[0099] In this embodiment, the cutting correction mechanism includes a cutting pressure roller and a guide roller. The cutting pressure roller is used to press the electrode sheet onto the guide roller, thereby preventing the electrode sheet from detaching from the constraint and swinging freely after cutting, providing a stable force base for subsequent correction. The cutting pressure roller is also used to move according to the cutting correction compensation value, so as to drive the guide roller and the cut electrode sheet to move, thereby directly providing the power required for correction and ensuring that the electrode sheet can be corrected in position according to the correction compensation value.

[0100] In some embodiments, the two ends of the guide roller are integrated with elastic reset devices; the elastic reset devices are used to drive the guide roller and the cut electrode sheet to move based on the movement of the cutter pressure roller, so as to correct the deviation of the cut electrode sheet.

[0101] To ensure that the guide roller can move axially under the drive of the cutter pressure roller and automatically return to its initial position after correction, in this embodiment, elastic reset devices are integrated at both ends of the guide roller. The elastic reset devices are used to drive the guide roller and the cut electrode sheet to move based on the movement of the cutter pressure roller.

[0102] For ease of understanding, reference 3 is provided, but this does not limit the scope of this application. Figure 3 This is a structural diagram of the cutter correction mechanism according to some embodiments of the present invention. As an example, such as... Figure 3 As shown, the cutter correction mechanism 12 includes a cutter pressure roller 121 and a guide roller 122. The cutter pressure roller 121 and the guide roller 122 are arranged opposite to each other, and the guide roller 122 has an elastic reset device 123 integrated at both ends.

[0103] The elastic reset device 123 is integrated at both ends of the roller 122 in the form of a spring assembly and a guide rail. The spring assembly is sleeved or connected to the roller shaft end to ensure that the roller 122 can undergo elastic deformation when subjected to force; the guide rail is precisely matched with the roller shaft to restrict the roller 122 to move only along the axial direction (the direction required for electrode correction) and avoid lateral offset or rotation.

[0104] In the specific implementation, the processor calculates the cutter correction compensation value and sends it to the cutter correction mechanism. The cutter pressure roller then moves axially. Since the cutter pressure roller and the guide roller are closely attached through the electrode sheet, the movement of the cutter pressure roller will generate an axial thrust on the guide roller. At this time, the spring assemblies at both ends of the guide roller undergo elastic deformation under the thrust. The guide rail constrains the guide roller to move synchronously with the cutter pressure roller along the axial direction, thereby driving the pressed and cut electrode sheet to move together, realizing the correction of the electrode sheet tail offset. When the correction is completed, the cutter pressure roller resets, the axial thrust on the guide roller disappears, the spring assembly releases elastic potential energy, and drives the guide roller to return to the initial position along the guide rail, preparing for the correction of the next cell.

[0105] In this embodiment, elastic reset devices are integrated at both ends of the roller. The elastic reset devices are used to drive the roller and the cut electrode sheet to move based on the movement of the cutter pressure roller, thereby ensuring that the roller can move axially under the drive of the cutter pressure roller and can automatically return to the initial position after the correction is completed.

[0106] In some embodiments, the winding device further includes a needle winding turntable, on which a plurality of needle winding stations are provided, and the winding mechanism is disposed at one of the needle winding stations.

[0107] In order to provide a structural foundation for the continuous production of the winding equipment, avoid equipment downtime caused by station switching, and improve overall production efficiency, in this embodiment, the winding equipment also includes: a needle winding turntable, on which multiple needle winding stations are provided, and the winding mechanism is set on one of the needle winding stations.

[0108] For ease of understanding, please refer to Figure 4 and Figure 5 This explanation is provided, but does not limit the scope of this application. Figure 4 and Figure 5 This is a side view structural diagram of a winding device according to some embodiments of the present invention. As an example, such as... Figure 4 As shown, the winding equipment also includes: a needle winding turntable 50, on which multiple needle winding stations are provided ( Figure 4 and Figure 5 The following explanation uses three winding stations as an example (specifically, the first station 51, the second station 52, and the third station 53). Each station has the same structure and is equipped with reserved installation space for the winding mechanism 20, ensuring that the winding mechanism 20 can be stably fixed at any station.

[0109] like Figure 4 As shown, in the initial stage of production, the winding mechanism 20 is fixed at the first station 51. The winding needle of the winding mechanism 20 drives the anode plate 40, the upper diaphragm 41, the cathode plate 42, and the lower diaphragm 43 to be wound through the film-coating roller 60, gradually forming a bare battery cell (the direction of the belt during winding is as shown in the figure). Figure 4(As shown by the middle arrow); after the winding mechanism 20 completes the winding of the bare cell (the cathode electrode 42 is finished), the winding needle turntable 50 rotates around the central axis by a preset angle (such as 120°) to rotate the winding mechanism 20 from the first station 51 to the second station 52, so as to realize the switching of the winding needle station.

[0110] like Figure 5 As shown, when the needle winding station is switched to the correct position, the cutting mechanism 10 extends to clamp the anode electrode 40, and the cutting roller 121 extends towards the passing roller and closes with the passing roller 122, tightly pressing the electrode 40 onto the surface of the passing roller 122. After the cutter 11 cuts the electrode and the diaphragm, the processor calculates the cutting correction compensation value and sends it to the cutting correction mechanism 12. The cutting roller 121 then moves axially. Since the cutting roller 121 and the passing roller 122 are tightly attached through the electrode 40, the movement of the cutting roller 121 will affect the passing roller 122. 22 generates axial thrust. At this time, the spring assemblies at both ends of the roller 122 undergo elastic deformation under the action of thrust. The guide rail constrains the roller to move synchronously along the axial direction with the cutter pressure roller 121, thereby driving the cut electrode sheet 40 that is pressed to move together, realizing the secondary correction of the tail offset of the electrode sheet. When the correction is completed, the cutter pressure roller 121 is reset, the axial thrust on the roller 122 disappears, the spring assembly releases elastic potential energy, and drives the roller 122 to return to the initial position along the guide rail, preparing for the correction of the next cell.

[0111] Throughout the process, the rotation of the needle winding turntable enables seamless connection between winding, changing stations, and rewinding. The alternating use of multiple needle winding stations avoids the problem of having to stop the machine to replace the needle after winding is completed when operating at a single station. Meanwhile, the winding mechanism is fixed at a single station and moves with the turntable, ensuring that it can always accurately connect with the cutting mechanism and the electrode conveyor path, providing stable support for correction and winding after the electrode is cut.

[0112] The winding equipment in this embodiment also includes a needle winding turntable, which is provided with multiple needle winding stations. The winding mechanism is set on one of the needle winding stations, thereby providing a structural basis for the continuous production of the winding equipment, avoiding equipment downtime due to station switching, and improving overall production efficiency.

[0113] In some embodiments, the winding device further includes a turret roller, which includes a plurality of rollers and rotates synchronously with the rotation of the needle winding turntable to coordinate with the switching action of the needle winding station.

[0114] To ensure that the new working position can immediately receive the electrode sheet via a roller when the needle winding turntable switches positions, and to avoid the electrode sheet transmission interruption caused by the single roller switching position, so that the electrode sheet correction and winding process can be continuously advanced, in this embodiment, the winding equipment also includes a turret roller. The turret roller includes multiple rollers, and the turret roller rotates synchronously with the rotation of the needle winding turntable to cooperate with the switching action of the needle winding position.

[0115] For ease of understanding, please refer to Figure 6 This explanation is provided, but does not limit the scope of this application. Figure 6 This is a side view structural diagram of a winding device according to some embodiments of the present invention. As an example, such as... Figure 6 As shown, the turret roller 70 refers to the key transmission and correction carrier in the winding equipment, adapted to the multi-station operation of the needle winding turntable 50. It is composed of multiple rollers 122 integrated on the turret (needle winding turntable) structure, with elastic reset devices integrated at both ends, which can achieve axial reciprocating motion and automatic reset along the guide rail. Its core function is to receive the electrode after the electrode is cut, and complete the secondary correction in conjunction with the cutter pressure roller 121. At the same time, it rotates synchronously with the needle winding turntable 50 to ensure that the electrode transmission and correction actions are uninterrupted when the station is switched, which meets the stability and continuity requirements of the continuous anode winding process. The multiple rollers 122 can refer to independent rollers integrated on the turret roller 70 that match the number of stations on the needle winding turntable 50 (e.g., if the needle winding turntable has 3 needle winding stations, the turret roller 70 is equipped with 3 rollers). Each roller 122 corresponds to one needle winding station and can independently cooperate with the cutter pressure roller 121 of that station to press the electrode and perform linkage correction. It is compatible with multiple workstations and alternating operations, avoiding the interruption of electrode transfer when a single roller switches workstations, and ensuring that each winding needle workstation has a corresponding roller to receive the electrode when it is in the working position.

[0116] The winding equipment in this embodiment also includes a turret roller, which includes multiple rollers. The turret roller rotates synchronously with the rotation of the needle winding turntable to coordinate with the switching action of the needle winding station. This ensures that when the needle winding turntable switches stations, the new working station can immediately receive the electrode sheet with a roller, avoiding the electrode sheet transmission interruption caused by the switching of a single roller, and allowing the electrode sheet correction and winding process to proceed continuously.

[0117] In some embodiments, the turret roller is mounted on the needle winding turntable via a rotating support component and is connected to the needle winding turntable via a transmission component. The number of turret rollers is equal to the number of stations on the needle winding turntable.

[0118] To ensure both the stability and non-deviation of the turret roller during rotation and absolute synchronization with the turntable, in this embodiment, the turret roller is mounted on the needle winding turntable via a rotating support component and is connected to the needle winding turntable via a transmission component. The number of turret rollers is equal to the number of stations on the needle winding turntable.

[0119] The rotating support component refers to a functional part (such as a deep groove ball bearing or rolling bearing assembly) used to mount the turret roller on the needle winding turntable. Its core function is to provide stable rotational support for the turret roller, ensuring that it rotates flexibly and smoothly with the needle winding turntable, while limiting the radial movement of the turret roller (preventing it from deviating from its preset position) and ensuring the alignment accuracy between the roller and the electrode feed path. The transmission component refers to a component (such as a gear set, synchronous pulley, or coupling) that transmits the rotational power of the needle winding turntable to the turret roller. One end is fixedly connected to the rotating shaft of the needle winding turntable, and the other end is connected to the central shaft of the turret roller, ensuring that the rotational power of the needle winding turntable is synchronously transmitted to the turret roller, making their angular velocities and rotation directions completely consistent. The transmission connection refers to the power transmission relationship established through the transmission component, the core of which is to achieve power synchronization between the needle winding turntable and the turret roller. When the needle winding turntable rotates, the transmission components drive the turret roller to rotate synchronously, preventing the turret roller from lagging behind or ahead of the turntable due to lack of power, which would cause misalignment between the roller and the work station.

[0120] In practical implementation, mounting holes are first pre-set on the annular bracket of the needle winding turntable. A rotating support component (such as a deep groove ball bearing) is then embedded into these holes. The outer ring of the bearing is fixed to the needle winding turntable bracket, while the inner ring is rigidly connected to the central shaft of the turret roller. This installation method ensures that the turret roller can rotate flexibly around the central shaft (meeting the requirement of rotating with the turntable), and also prevents the turret roller from wobbling or shifting during rotation through the radial constraint of the bearing, ensuring that the relative position of the roller and the corresponding needle winding station remains unchanged. A driving transmission component (such as a driving gear) is fixed on the rotating shaft of the needle winding turntable, while a driven transmission component (such as a driven gear) is fixed on the central shaft of the turret roller. This allows the driving and driven gears to mesh precisely (or connect the driving and driven pulleys via a synchronous belt), forming a power transmission path of needle winding turntable rotating shaft → driving transmission component → driven transmission component → turret roller central shaft. When the needle winding turntable starts rotating due to a station change, its rotational power is synchronously transmitted to the turret rollers through the transmission components. This ensures that the rotational angular velocity and direction of the turret rollers are completely consistent with those of the needle winding turntable, achieving a synchronous effect where the rollers rotate the same amount as the turntable. Based on the number of stations on the needle winding turntable (e.g., 3), the number of turret rollers is determined to be 3, and these 3 rollers are evenly distributed along the central axis of the turret rollers (the spacing is consistent with the spacing of the needle winding stations). Each roller corresponds one-to-one with a needle winding station, and the axial position and height of the rollers are precisely aligned with the electrode sheet feeding path and the extension / retraction path of the cutter pressure roller at the corresponding station. This ensures that after a station change, the newly entered rollers in the working area can immediately adapt to the cutter pressure roller and winding mechanism without any additional position adjustments.

[0121] In this embodiment, the turret roller is mounted on the needle winding turntable via a rotating support component and is connected to the needle winding turntable via a transmission component. The number of rollers on the turret is equal to the number of stations on the needle winding turntable, thereby ensuring that the turret roller remains stable and does not deviate during rotation, while also achieving absolute synchronization with the turntable.

[0122] In some embodiments, the cutting mechanism is used to move from a preset cutting preparation position to a cutting working position corresponding to the electrode sheet; the cutting pressure roller is used to extend from the cutting mechanism and press the electrode sheet onto the guide roller when the cutting mechanism moves to the cutting working position; the cutting pressure roller is used to retract the cutting mechanism after the winding mechanism completes the winding of the electrode sheet after correction; the cutting mechanism is used to return from the cutting working position to the preset cutting preparation position when the cutting pressure roller retracts.

[0123] In order to avoid interfering with subsequent processes and ensure cyclic operation, in this embodiment, the cutter pressure roller retracts into the cutter mechanism after the correction is completed, and the cutter mechanism returns from the cutting position to the preset cutting preparation position.

[0124] For ease of understanding, please refer to Figure 7 This explanation is provided, but does not limit the scope of this application. Figure 7 This is a flowchart illustrating the correction process for some embodiments of the present invention. As an example, such as... Figure 7 As shown, the electrode correction process includes the following steps: 1. After the cathode electrode of the battery cell is finished, the turntable rotates and the winding needle station switches positions; 2. The cutting mechanism moves to the cutting position, extends, and clamps the anode electrode; 3. The cutting pressure roller of the cutting mechanism extends and merges with the turret roller, pressing the electrode in the middle; 4. The cutter cuts the electrode; 5. The winding needle rotates to rewind; 6. The motor of the cutting mechanism acts to correct the tail of the electrode; 7. After the tail of the electrode is completely wound into the bare battery cell, the tail compensation correction ends, the cutting pressure roller retracts, and the cutting mechanism returns to the preset cutting preparation position.

[0125] In practice, after the winding mechanism completes the winding of the bare battery cell (cathode electrode finishing), the winding needle turntable rotates around the central axis by a preset angle, rotating the winding mechanism from the first station to the second station, thus achieving needle station switching. Once the needle station is in position, the cutting mechanism starts from the preset cutting preparation position (initial position) and moves to the cutting working position via the drive unit. This process requires precise alignment of the electrode cutting point to ensure that the relative positions of the cutter, the cutter pressure roller, and the guide roller (turret guide roller) are matched, preparing for subsequent electrode pressing and cutting.

[0126] When the cutting mechanism reaches the cutting position, the cutting pressure roller extends from the cutting mechanism toward the passing roller until it comes into contact with the passing roller, tightly pressing the anode electrode sheet onto the surface of the passing roller. At this time, due to the constraint of the elastic reset devices at both ends, the passing roller forms a rigid contact state with the cutting pressure roller, which not only fixes the electrode sheet to prevent displacement during cutting, but also provides stable constraints for the subsequent cutting of the electrode sheet by the cutting blade and for the cutting blade correction mechanism (based on the cutting blade correction compensation value) to drive the passing roller and the electrode sheet to move.

[0127] The winding mechanism initiates the winding action, driving the tail of the corrected electrode sheet to wind up. Simultaneously, it completes processes such as separator winding and adhesive application. Once the tail of the electrode sheet is completely wound into the bare cell, the cutter pressure roller no longer needs to press the electrode sheet and retracts from the roller direction into the cutter mechanism. This action prevents the cutter pressure roller from obstructing subsequent processes (such as the turret continuing to rotate or the adhesive roller applying adhesive), and simultaneously releases the roller, allowing it to return to its initial position via an elastic reset device.

[0128] After the cutting roller is fully retracted into the cutting mechanism, the cutting mechanism starts the drive unit and moves from the cutting work position back to the preset cutting preparation position. This action takes the cutting mechanism away from the electrode tape path, reserving space for the next bare cell winding, and at the same time puts the cutting mechanism in a ready-to-start state to ensure that the next round of cutting process can respond quickly.

[0129] In this embodiment, the cutter pressure roller retracts into the cutter mechanism after the correction is completed, and the cutter mechanism returns from the cutting working position to the preset cutting preparation position, thereby avoiding interference with subsequent processes and ensuring cyclic operation.

[0130] In some embodiments, the winding device further includes: an image acquisition unit disposed between the cutter and the winding mechanism; the image acquisition unit is configured to acquire an image of the cut electrode sheet within the cut area and send the image of the cut electrode sheet to the processor, wherein the cut area is the area between the cutter and the winding mechanism; the processor is further configured to determine a cutter correction compensation value for the cut electrode sheet based on the image of the cut electrode sheet and send the cutter correction compensation value to the cutter correction mechanism.

[0131] In order to accurately obtain the electrode offset within the cutting area and improve the accuracy of the cutter correction compensation value, in this embodiment, the winding device also includes an image acquisition unit. The image acquisition unit acquires the electrode offset within the cutting area after cutting, and determines the cutter correction compensation value based on the electrode offset.

[0132] For ease of understanding, please refer to Figure 8 This explanation is provided, but does not limit the scope of this application. Figure 8 This is a top view of a winding apparatus according to some embodiments of the present invention. As an example, such as... Figure 8As shown, the winding equipment also includes an image acquisition unit 80, which can be a charge-coupled device (CCD) camera, positioned between the cutter 11 and the winding mechanism 20. It can capture real-time images of the cut area 90 of the electrode sheet after cutting, calculate the electrode sheet offset using a visual algorithm, and determine the cutter correction compensation value based on the offset, providing the processor 30 with accurate correction data. The cut area 90 refers to the electrode sheet area between the cutter 11 and the winding mechanism 20, i.e., the section where the electrode sheet is cut by the cutter but not yet clamped and wound by the winding needles of the winding mechanism 20, and is in an unconstrained state. The electrode sheet in this area is prone to offset due to tension, gravity, and equipment vibration, and is the core area where tail-wagging problems occur. The electrode sheet offset refers to a key parameter obtained by the image acquisition unit 80 through visual inspection, indicating the distance difference (in mm) between the actual position of the electrode sheet within the cut area 90 and the standard material line of the winding process. It reflects the severity of the electrode sheet tail offset and is the direct basis for determining the cutter correction compensation value. The cutting tool correction compensation value can refer to the correction parameter calculated based on the electrode offset. In specific implementations, the electrode offset can be directly used as the cutting tool correction compensation value, or the cutting tool correction compensation value can be calculated based on the electrode offset using a preset correction model. The preset correction model can be set in advance, and this embodiment does not impose any restrictions on it.

[0133] The winding device in this embodiment also includes an image acquisition unit, which acquires the electrode offset in the cutting area after cutting, and determines the cutter correction compensation value based on the electrode offset, thereby accurately acquiring the electrode offset in the cutting area and improving the accuracy of the cutter correction compensation value.

[0134] In some embodiments, the winding device further includes: a clamping and correction mechanism and a correction sensor; the correction sensor is used to acquire the material line offset of the electrode sheet before cutting and send the material line offset to the processor; the processor is further used to calculate a clamping correction compensation value and a cutting correction compensation value based on the material line offset, and send the clamping correction compensation value to the clamping and correction mechanism and the cutting correction compensation value to the cutting correction mechanism; the clamping and correction mechanism is used to perform initial correction on the electrode sheet based on the clamping correction compensation value.

[0135] For equipment with continuous anode winding, after the anode tail is cut, secondary compensation and correction are performed on the portion that cannot be completely corrected by the clamping and correction mechanism. This ensures that the anode tail can still be controlled by correction after cutting, guaranteeing the consistency of the anode tail with the material line in the process. In this embodiment, the winding equipment also includes a clamping and correction mechanism and a correction sensor. The correction sensor acquires the material line offset of the electrode sheet before cutting. The processor calculates the clamping and correction compensation value and the cutting correction compensation value based on the material line offset. The clamping and correction mechanism performs the first correction on the electrode sheet based on the clamping and correction compensation value, and the cutting correction mechanism performs the second correction on the cut electrode sheet based on the cutting correction compensation value.

[0136] In this specific implementation, the guide roller is modified by integrating elastic reset devices on both sides of the roller body. Axial displacement constraint is achieved through guide rails, ensuring that the roller body reciprocates in the axial direction and has an automatic reset function. After the anode electrode passes the clamping and correction mechanism, the cutter roller presses the electrode onto the guide roller. After the anode electrode is cut off at the tail, the cutter roller moves left and right to move the guide roller and the electrode together. This compensates for and corrects the offset of the anode electrode tail that was not completely corrected at the clamping and correction roller position, further controlling and reducing the difference between the anode electrode tail and the process material line.

[0137] For ease of understanding, please refer to Figure 9 This explanation is provided, but does not limit the scope of this application. Figure 9 This is a top view of a winding apparatus according to some embodiments of the present invention. As an example, such as... Figure 9 As shown, the clamping correction mechanism 100 and the correction sensor 110 are held together.

[0138] The correction sensor 110 can acquire the actual material line position of the electrode 40 before cutting in real time through visual detection or position sensing technology, calculate the deviation between the actual material line position and the standard material line (such as a baseline), i.e., the material line offset, and transmit the material line offset to the processor 30 in real time to provide raw detection data for subsequent compensation value calculation. The clamping correction mechanism 100 can receive the clamping correction compensation value sent by the processor 30 and perform preliminary position correction of the electrode 40 before cutting by adjusting the lateral position of its own clamping rollers. The winding needle corresponding to the first station 51 can be used to cooperate with the cutter 11 to complete the cutting action of the electrode 40. When the electrode 40 is transmitted to the preset position, it provides support for the cutter 11 to cut the electrode 40. The winding mechanism 20 is used to wind up the electrode sheet 40 after initial correction by the clamping and correction mechanism 100 and secondary correction by the cutting correction mechanism 12, completing the cell winding process. It is the supporting component for the final forming of the electrode sheet. Its rotational winding action must be synchronized with the preceding correction action to ensure accurate winding of the corrected electrode sheet. The material line offset refers to the distance difference (unit: mm) between the actual material line of the electrode sheet 40 before cutting and the standard material line, detected by the correction sensor 110. It reflects the positional deviation of the electrode sheet before cutting and is the core input parameter for the processor 30 to calculate the clamping correction compensation value and the cutting correction compensation value. The clamping correction compensation value refers to the parameter calculated by the processor 30 based on the material line offset sent by the correction sensor, used to guide the correction action amplitude of the clamping correction mechanism.

[0139] The winding equipment in this embodiment also includes a clamping and correction mechanism and a correction sensor. The correction sensor acquires the offset of the electrode wire before cutting. The processor calculates the clamping correction compensation value and the cutting correction compensation value based on the offset of the wire. The clamping and correction mechanism performs the first correction of the electrode wire based on the clamping correction compensation value. The cutting correction mechanism performs the second correction of the electrode wire after cutting based on the cutting correction compensation value. This enables the second compensation correction of the part that cannot be completely corrected by the clamping correction, so that the anode tail can still be controlled by correction after cutting, ensuring the consistency of the anode tail with the wire in the process.

[0140] In some embodiments, the processor is further configured to, if the material line offset is greater than a preset threshold, use the preset threshold as a clamping correction compensation value, and determine a cutter correction compensation value based on the difference between the material line offset and the preset threshold; the processor is further configured to, if the material line offset is less than or equal to the preset threshold, use the material line offset as a clamping correction compensation value, and use a preset value as a cutter correction compensation value.

[0141] In the continuous anode winding process, the control of the offset of the tail of the previous cell by the clamping and correction mechanism directly affects the offset state of the anode head of the next cell. Therefore, the correction amount of the clamping and correction needs to be controlled within a reasonable range. To ensure that the clamping and correction amount is controlled within a reasonable range and to maximize the use of the clamping and correction capability, in this embodiment, if the material line offset is greater than a preset threshold, the preset threshold is used as the clamping and correction compensation value, and the cutter correction compensation value is determined based on the difference between the material line offset and the preset threshold. The processor is also configured to use the material line offset as the clamping and correction compensation value and the preset value as the cutter correction compensation value if the material line offset is less than or equal to the preset threshold.

[0142] The preset threshold can refer to a reasonable range of critical values ​​(e.g., a preset threshold of 0.5mm) set based on the principle of "avoiding excessive clamping correction amount from affecting the anode head offset of the next cell." This represents the maximum safe correction amount of the clamping correction mechanism. If the clamping correction amount exceeds this threshold, excessive correction at the tail of the previous cell will cause abnormal anode head offset in the next cell. If it is within this threshold, the current cell deviation can be effectively corrected without adversely affecting the next cell. The preset value can refer to a pre-set fixed value (e.g., 0), representing the compensation value when the cutting correction mechanism does not need to intervene.

[0143] In the specific implementation, the processor pre-implants a preset threshold (such as 0.5mm) and a preset value (such as 0). During the production process, the current cell electrode roll is transported along the conveyor belt direction to the detection area of ​​the correction sensor. The correction sensor calculates the offset of the material line before cutting in real time (such as 0.8mm or 0.4mm) and sends the data to the processor in real time.

[0144] Scenario 1: Material line offset > preset threshold (e.g., 0.8mm > 0.5mm):

[0145] Step 1: Calculate the clamping correction compensation value: The processor determines that if clamping correction is performed based on the actual offset (0.8mm), it will exceed the reasonable range of "not affecting the next cell" (preset threshold 0.5mm), causing excessive correction at the tail of the previous cell (i.e., the current cell), which in turn will cause abnormal offset of the anode head of the next cell. Therefore, the processor uses the preset threshold (0.5mm) as the clamping correction compensation value, which maximizes the use of clamping correction capability to correct part of the deviation of the current cell, while strictly controlling the correction amount within a safe range to avoid affecting the next cell.

[0146] Step 2: Calculate the cutter correction compensation value: The processor first calculates the remaining deviation of the current cell that has not been clamped and corrected (0.8mm-0.5mm=0.3mm), and then obtains the cutter correction compensation value (0.3mm). By supplementing and correcting the remaining deviation through cutter correction, there is no need to rely on excessive clamping correction, which solves the current cell's "tailing" risk without affecting the next cell.

[0147] Step 3: Command transmission: The processor sends the clamping correction compensation value (0.5mm) to the clamping correction mechanism, and at the same time temporarily stores the cutting correction compensation value (0.3mm), which is sent to the cutting correction mechanism after the current cell electrode is cut.

[0148] Scenario 2: Material line offset ≤ preset threshold (e.g., 0.4mm < 0.5mm):

[0149] Step 1: Calculate the clamping correction compensation value: The processor determines that clamping correction should be performed based on the actual offset (0.4mm). This not only completely corrects the current cell deviation but also falls within a reasonable range (≤0.5mm) that "does not affect the next cell," preventing abnormal anode head offset in the next cell. Therefore, the processor directly uses the wire offset (0.4mm) as the clamping correction compensation value, achieving dual assurance of accurate correction for the current cell and quality for the next cell.

[0150] Step 2: Calculate the cutter correction compensation value: The processor determines that the current cell has no remaining deviation after clamping and correction, and there is no need to start the cutter correction (to avoid invalid actions and increase mechanical wear). Therefore, the preset value (0) is used as the cutter correction compensation value, and the cutter correction mechanism remains in its initial state.

[0151] Step 3: Command transmission: The processor sends the clamping correction compensation value (0.4mm) to the clamping correction mechanism, and at the same time sends the command "compensation value is 0" to the cutting correction mechanism.

[0152] In this embodiment, if the material line offset is greater than a preset threshold, the preset threshold is used as the clamping correction compensation value, and the cutter correction compensation value is determined based on the difference between the material line offset and the preset threshold. The processor is also used to use the material line offset as the clamping correction compensation value and the preset value as the cutter correction compensation value if the material line offset is less than or equal to the preset threshold, thereby ensuring that the clamping correction amount is controlled within a reasonable range and maximizing the use of the clamping correction capability.

[0153] In some embodiments, the processor is further configured to calculate the difference between the material line offset and the preset threshold; the processor is further configured to obtain the compensation coefficient for cutter correction, and calculate the cutter correction compensation value based on the difference and the compensation coefficient.

[0154] In order to adapt to different production conditions and improve the versatility of the correction, in this embodiment, the difference between the material line offset and the preset threshold is calculated, and the cutter correction compensation value is calculated based on the difference and the compensation coefficient.

[0155] The compensation coefficient can be an empirical coefficient preset based on the electrode production process (such as electrode thickness, winding speed, and material hardness) (for example, it can be 1.0-1.5). It is used to adapt the cutting accuracy under different production conditions. For example, the coefficient can be set to 1.3 when the electrode thickness is thick and 1.0 when the thickness is thin. Its function is to avoid excessive or insufficient cutting accuracy due to process differences and to ensure that the compensation value matches the actual needs.

[0156] For ease of understanding, please refer to Figure 10 This explanation is provided, but does not limit the scope of this application. Figure 10 This is a flowchart illustrating the correction process for some embodiments of the present invention. As an example, such as... Figure 10 As shown, the processor pre-implants a preset threshold (e.g., 0.5mm) and a preset value (e.g., 0). During the production process, the current cell electrode roll is transported along the conveyor belt to the detection area of ​​the correction sensor. The correction sensor calculates the offset of the material line before cutting in real time (e.g., 0.8mm or 0.4mm) and sends the data to the processor in real time.

[0157] Scenario 1: Material line offset > preset threshold (e.g., 0.8mm > 0.5mm):

[0158] Step 1: Calculate the clamping correction compensation value: The processor determines that if clamping correction is performed based on the actual offset (0.8mm), it will exceed the reasonable range of "not affecting the next cell" (preset threshold 0.5mm), causing excessive correction at the tail of the previous cell (i.e., the current cell), which in turn will cause abnormal offset of the anode head of the next cell. Therefore, the processor uses the preset threshold (0.5mm) as the clamping correction compensation value, which maximizes the use of clamping correction capability to correct part of the deviation of the current cell, while strictly controlling the correction amount within a safe range to avoid affecting the next cell.

[0159] Step 2: Calculate the cutter correction compensation value: The processor first calculates the difference between "material line offset - preset threshold" (0.8mm-0.5mm=0.3mm), and then combines it with the preset compensation coefficient (such as 1.1) to obtain the cutter correction compensation value (0.3mm×1.1=0.33mm), ensuring that the secondary correction can completely eliminate the offset.

[0160] Step 3: Command transmission: The processor sends the clamping correction compensation value (0.5mm) to the clamping correction mechanism, and at the same time temporarily stores the cutting correction compensation value (0.33mm), which is sent to the cutting correction mechanism after the current cell electrode is cut.

[0161] Scenario 2: Material line offset ≤ preset threshold (e.g., 0.4mm < 0.5mm):

[0162] Step 1: Calculate the clamping correction compensation value: The processor determines that clamping correction should be performed based on the actual offset (0.4mm). This not only completely corrects the current cell deviation but also falls within a reasonable range (≤0.5mm) that "does not affect the next cell," preventing abnormal anode head offset in the next cell. Therefore, the processor directly uses the wire offset (0.4mm) as the clamping correction compensation value, achieving dual assurance of accurate correction for the current cell and quality for the next cell.

[0163] Step 2: Calculate the cutter correction compensation value: The processor determines that the current cell has no remaining deviation after clamping and correction, and there is no need to start the cutter correction (to avoid invalid actions and increase mechanical wear). Therefore, the preset value (0) is used as the cutter correction compensation value, and the cutter correction mechanism remains in its initial state.

[0164] Step 3: Command transmission: The processor sends the clamping correction compensation value (0.4mm) to the clamping correction mechanism, and at the same time sends the command "compensation value is 0" to the cutting correction mechanism.

[0165] This embodiment calculates the difference between the material line offset and a preset threshold, and calculates the cutter correction compensation value based on the difference and the compensation coefficient, thereby adapting to different production conditions and improving the versatility of correction.

[0166] In some embodiments, such as Figure 11 As shown, a winding method is proposed, including:

[0167] Step S10: When the electrode sheet is wound into a bare cell, cut the electrode sheet and calculate the cutting correction compensation value of the electrode sheet after cutting.

[0168] Step S20: Correct the deviation of the cut electrode sheet according to the cutter deviation compensation value, and then wind up the corrected electrode sheet.

[0169] In this embodiment, the winding method can be applied to a winding device, which includes a cutting mechanism, a winding mechanism, and a processor. The cutting mechanism includes a cutter and a cutter correction mechanism. The cutter is used to cut the electrode sheet when the winding mechanism winds the electrode sheet into a bare cell. The processor is used to calculate the cutter correction compensation value of the cut electrode sheet and send the cutter correction compensation value to the cutter correction mechanism. The cutter correction mechanism is used to correct the deviation of the cut electrode sheet according to the cutter correction compensation value. The winding mechanism is used to wind up the corrected electrode sheet.

[0170] For ease of understanding, please refer to Figure 1 This explanation is provided, but does not limit the scope of this application. Figure 1 This is a top view of a winding apparatus according to some embodiments of the present invention. As an example, such as... Figure 1As shown, the winding device includes a cutting mechanism 10, a winding mechanism 20, and a processor 30. The cutting mechanism 10 includes a cutter 11 and a cutter correction mechanism 12.

[0171] The winding equipment refers to continuous winding equipment used in the battery field, specifically used to wind anode plates, cathode plates, and separators to form bare cells, enabling integrated operations of plate cutting, deviation compensation, and winding. The cutting mechanism 10 refers to the component in the winding equipment responsible for plate cutting and tail deviation correction, including a cutter 11 and a cutter deviation correction mechanism 12, capable of clamping, pressing, cutting, and deviation correction of the plates. The cutter 11 is used to precisely cut the plates 40 (such as anode plates) after the winding mechanism 20 completes the bare cell winding process, achieving plate separation between the front and rear cells. The cutter deviation correction mechanism 12 refers to the component in the cutting mechanism 10 responsible for tail deviation correction of the plates, controlled by the processor 30, and can compensate for the offset of the cut plate tail. In specific implementations, the cutter deviation correction mechanism 12 can be a correction roller, or it can include a cutter pressure roller and a guide roller, with the cutter pressure roller and guide roller arranged opposite to each other; this embodiment does not limit this. The winding mechanism 20 can refer to the core winding component of the winding equipment, including components such as winding needles, used to drive the electrode sheet 40 to wind into a bare cell, and can complete the winding of the electrode sheet 40 after correction. The processor 30 can refer to the control core of the winding equipment, which can receive sensor data, calculate the cutter correction compensation value of the electrode sheet after cutting, and send control commands to the cutter correction mechanism 12. The bare cell can refer to the semi-finished cell that has not undergone subsequent packaging, liquid injection, or other processes after the anode electrode sheet, cathode electrode sheet, and separator have been wound into shape by the winding mechanism. The cutter correction compensation value can refer to the correction parameters calculated by the processor 30 based on the actual offset of the anode tail, used to guide the movement distance of the cutter correction mechanism 12.

[0172] In practical implementation, during the stage where the winding mechanism winds the electrode sheet and separator to form the bare cell (after the cathode electrode sheet is finished and the winding needle station is switched into position), the cutting mechanism first extends to clamp the anode electrode sheet and press it firmly. Then, the cutter precisely cuts the electrode sheet, completing the electrode separation between the front and rear cells. The processor first calculates the cutting correction compensation value and then sends the cutting correction compensation value to the cutting correction mechanism in real time. After receiving the compensation value, the cutting correction mechanism corrects the tail of the cut electrode sheet. After the cutting correction mechanism completes the correction, the winding needle of the winding mechanism rotates, driving the corrected tail of the electrode sheet to be wound up. At the same time, in conjunction with the separator winding and adhesive application processes, the bare cell is wound and formed.

[0173] In this embodiment, when the electrode sheet is wound into a bare cell, the electrode sheet after cutting is corrected based on the cutting blade correction compensation value. This allows for effective correction of the tail of the electrode sheet during the winding process, thereby preventing the tail of the electrode sheet from swinging off.

[0174] In some embodiments, such as Figure 12 As shown, before step S20, the procedure further includes:

[0175] Step S11: Obtain the electrode offset within the cutting area after cutting, and determine the cutter correction compensation value based on the electrode offset, wherein the cutting area is the region between the cutter of the electrode and the winding point of the cut electrode.

[0176] In order to accurately obtain the electrode offset within the cutting area and improve the accuracy of the cutter correction compensation value, in this embodiment, the winding device also includes an image acquisition unit. The image acquisition unit acquires the electrode offset within the cutting area after cutting, and determines the cutter correction compensation value based on the electrode offset.

[0177] For ease of understanding, please refer to Figure 8 This explanation is provided, but does not limit the scope of this application. Figure 8 This is a top view of a winding apparatus according to some embodiments of the present invention. As an example, such as... Figure 8 As shown, the winding equipment also includes an image acquisition unit 80, which can be a charge-coupled device (CCD) camera, positioned between the cutter 11 and the winding mechanism 20. It can capture real-time images of the cut area 90 of the electrode sheet after cutting, calculate the electrode sheet offset using a visual algorithm, and determine the cutter correction compensation value based on the offset, providing the processor 30 with accurate correction data. The cut area 90 refers to the electrode sheet area between the cutter 11 and the winding mechanism 20, i.e., the section where the electrode sheet is cut by the cutter but not yet clamped and wound by the winding needles of the winding mechanism 20, and is in an unconstrained state. The electrode sheet in this area is prone to offset due to tension, gravity, and equipment vibration, and is the core area where tail-wagging problems occur. The electrode sheet offset refers to a key parameter obtained by the image acquisition unit 80 through visual inspection, indicating the distance difference (in mm) between the actual position of the electrode sheet within the cut area 90 and the standard material line of the winding process. It reflects the severity of the electrode sheet tail offset and is the direct basis for determining the cutter correction compensation value. The cutting tool correction compensation value can refer to the correction parameter calculated based on the electrode offset. In specific implementations, the electrode offset can be directly used as the cutting tool correction compensation value, or the cutting tool correction compensation value can be calculated based on the electrode offset using a preset correction model. The preset correction model can be set in advance, and this embodiment does not impose any restrictions on it.

[0178] This embodiment obtains the electrode offset within the cutting area after cutting and determines the cutter correction compensation value based on the electrode offset, thereby improving the accuracy of the cutter correction compensation value.

[0179] In some embodiments, such as Figure 13As shown, before step S20, the procedure further includes:

[0180] Step S11': Obtain the offset of the electrode line before cutting.

[0181] Step S12': Calculate the clamping correction compensation value and the cutting blade correction compensation value based on the material line offset.

[0182] Step S13': Correct the electrode sheet according to the clamping correction compensation value.

[0183] For equipment with continuous anode winding, after the anode tail is cut, secondary compensation and correction are performed on the portion that cannot be completely corrected by the clamping and correction mechanism. This ensures that the anode tail can still be controlled by correction after cutting, guaranteeing the consistency of the anode tail with the material line in the process. In this embodiment, the winding equipment also includes a clamping and correction mechanism and a correction sensor. The correction sensor acquires the material line offset of the electrode sheet before cutting. The processor calculates the clamping and correction compensation value and the cutting correction compensation value based on the material line offset. The clamping and correction mechanism performs the first correction on the electrode sheet based on the clamping and correction compensation value, and the cutting correction mechanism performs the second correction on the cut electrode sheet based on the cutting correction compensation value.

[0184] In this specific implementation, the guide roller is modified by integrating elastic reset devices on both sides of the roller body. Axial displacement constraint is achieved through guide rails, ensuring that the roller body reciprocates in the axial direction and has an automatic reset function. After the anode electrode passes the clamping and correction mechanism, the cutter roller presses the electrode onto the guide roller. After the anode electrode is cut off at the tail, the cutter roller moves left and right to move the guide roller and the electrode together. This compensates for and corrects the offset of the anode electrode tail that was not completely corrected at the clamping and correction roller position, further controlling and reducing the difference between the anode electrode tail and the process material line.

[0185] For ease of understanding, please refer to Figure 9 This explanation is provided, but does not limit the scope of this application. Figure 9 This is a top view of a winding apparatus according to some embodiments of the present invention. As an example, such as... Figure 9 As shown, the clamping correction mechanism 100 and the correction sensor 110 are held together.

[0186] The correction sensor 110 can acquire the actual material line position of the electrode 40 before cutting in real time through visual detection or position sensing technology, calculate the deviation between the actual material line position and the standard material line (such as a baseline), i.e., the material line offset, and transmit the material line offset to the processor 30 in real time to provide raw detection data for subsequent compensation value calculation. The clamping correction mechanism 100 can receive the clamping correction compensation value sent by the processor 30 and perform preliminary position correction of the electrode 40 before cutting by adjusting the lateral position of its own clamping rollers. The winding needle corresponding to the first station 51 can be used to cooperate with the cutter 11 to complete the cutting action of the electrode 40. When the electrode 40 is transmitted to the preset position, it provides support for the cutter 11 to cut the electrode 40. The winding mechanism 20 is used to wind up the electrode sheet 40 after initial correction by the clamping and correction mechanism 100 and secondary correction by the cutting correction mechanism 12, completing the cell winding process. It is the supporting component for the final forming of the electrode sheet. Its rotational winding action must be synchronized with the preceding correction action to ensure accurate winding of the corrected electrode sheet. The material line offset refers to the distance difference (unit: mm) between the actual material line of the electrode sheet 40 before cutting and the standard material line, detected by the correction sensor 110. It reflects the positional deviation of the electrode sheet before cutting and is the core input parameter for the processor 30 to calculate the clamping correction compensation value and the cutting correction compensation value. The clamping correction compensation value refers to the parameter calculated by the processor 30 based on the material line offset sent by the correction sensor, used to guide the correction action amplitude of the clamping correction mechanism.

[0187] This embodiment obtains the material line offset of the electrode sheet before cutting, calculates the clamping correction compensation value and the cutting correction compensation value based on the material line offset, performs the first correction on the electrode sheet based on the clamping correction compensation value, and performs the second correction on the electrode sheet after cutting based on the cutting correction compensation value. This enables the second compensation correction for the part that cannot be completely corrected by the clamping correction, so that the anode tail can still be controlled by correction after cutting, ensuring the consistency of the anode tail with the material line in the process.

[0188] In some embodiments, step S12' includes: if the material line offset is greater than a preset threshold, then the preset threshold is used as a clamping correction compensation value, and a cutter correction compensation value is determined based on the difference between the material line offset and the preset threshold; if the material line offset is less than or equal to the preset threshold, then the material line offset is used as a clamping correction compensation value, and a preset value is used as a cutter correction compensation value.

[0189] In the continuous anode winding process, the control of the offset of the tail of the previous cell by the clamping and correction mechanism directly affects the offset state of the anode head of the next cell. Therefore, the correction amount of the clamping and correction needs to be controlled within a reasonable range. To ensure that the clamping and correction amount is controlled within a reasonable range and to maximize the use of the clamping and correction capability, in this embodiment, if the material line offset is greater than a preset threshold, the preset threshold is used as the clamping and correction compensation value, and the cutter correction compensation value is determined based on the difference between the material line offset and the preset threshold. The processor is also configured to use the material line offset as the clamping and correction compensation value and the preset value as the cutter correction compensation value if the material line offset is less than or equal to the preset threshold.

[0190] The preset threshold can refer to a reasonable range of critical values ​​(e.g., a preset threshold of 0.5mm) set based on the principle of "avoiding excessive clamping correction amount from affecting the anode head offset of the next cell." This represents the maximum safe correction amount of the clamping correction mechanism. If the clamping correction amount exceeds this threshold, excessive correction at the tail of the previous cell will cause abnormal anode head offset in the next cell. If it is within this threshold, the current cell deviation can be effectively corrected without adversely affecting the next cell. The preset value can refer to a pre-set fixed value (e.g., 0), representing the compensation value when the cutting correction mechanism does not need to intervene.

[0191] In the specific implementation, the processor pre-implants a preset threshold (such as 0.5mm) and a preset value (such as 0). During the production process, the current cell electrode roll is transported along the conveyor belt direction to the detection area of ​​the correction sensor. The correction sensor calculates the offset of the material line before cutting in real time (such as 0.8mm or 0.4mm) and sends the data to the processor in real time.

[0192] Scenario 1: Material line offset > preset threshold (e.g., 0.8mm > 0.5mm):

[0193] Step 1: Calculate the clamping correction compensation value: The processor determines that if clamping correction is performed based on the actual offset (0.8mm), it will exceed the reasonable range of "not affecting the next cell" (preset threshold 0.5mm), causing excessive correction at the tail of the previous cell (i.e., the current cell), which in turn will cause abnormal offset of the anode head of the next cell. Therefore, the processor uses the preset threshold (0.5mm) as the clamping correction compensation value, which maximizes the use of clamping correction capability to correct part of the deviation of the current cell, while strictly controlling the correction amount within a safe range to avoid affecting the next cell.

[0194] Step 2: Calculate the cutter correction compensation value: The processor first calculates the remaining deviation of the current cell that has not been clamped and corrected (0.8mm-0.5mm=0.3mm), and then obtains the cutter correction compensation value (0.3mm). By supplementing and correcting the remaining deviation through cutter correction, there is no need to rely on excessive clamping correction, which solves the current cell's "tailing" risk without affecting the next cell.

[0195] Step 3: Command transmission: The processor sends the clamping correction compensation value (0.5mm) to the clamping correction mechanism, and at the same time temporarily stores the cutting correction compensation value (0.3mm), which is sent to the cutting correction mechanism after the current cell electrode is cut.

[0196] Scenario 2: Material line offset ≤ preset threshold (e.g., 0.4mm < 0.5mm):

[0197] Step 1: Calculate the clamping correction compensation value: The processor determines that clamping correction should be performed based on the actual offset (0.4mm). This not only completely corrects the current cell deviation but also falls within a reasonable range (≤0.5mm) that "does not affect the next cell," preventing abnormal anode head offset in the next cell. Therefore, the processor directly uses the wire offset (0.4mm) as the clamping correction compensation value, achieving dual assurance of accurate correction for the current cell and quality for the next cell.

[0198] Step 2: Calculate the cutter correction compensation value: The processor determines that the current cell has no remaining deviation after clamping and correction, and there is no need to start the cutter correction (to avoid invalid actions and increase mechanical wear). Therefore, the preset value (0) is used as the cutter correction compensation value, and the cutter correction mechanism remains in its initial state.

[0199] Step 3: Command transmission: The processor sends the clamping correction compensation value (0.4mm) to the clamping correction mechanism, and at the same time sends a command to the cutting correction mechanism that the compensation value is 0.

[0200] In this embodiment, if the material line offset is greater than a preset threshold, the preset threshold is used as the clamping correction compensation value, and the cutter correction compensation value is determined based on the difference between the material line offset and the preset threshold. The processor is also used to use the material line offset as the clamping correction compensation value and the preset value as the cutter correction compensation value if the material line offset is less than or equal to the preset threshold, thereby ensuring that the clamping correction amount is controlled within a reasonable range and maximizing the use of the clamping correction capability.

[0201] In some embodiments, determining the cutter correction compensation value based on the difference between the material line offset and the preset threshold includes: calculating the difference between the material line offset and the preset threshold; obtaining the cutter correction compensation coefficient; and calculating the cutter correction compensation value based on the difference and the compensation coefficient.

[0202] In order to adapt to different production conditions and improve the versatility of the correction, in this embodiment, the difference between the material line offset and the preset threshold is calculated, and the cutter correction compensation value is calculated based on the difference and the compensation coefficient.

[0203] The compensation coefficient can be an empirical coefficient preset based on the electrode production process (such as electrode thickness, winding speed, and material hardness) (for example, it can be 1.0-1.5). It is used to adapt the cutting accuracy under different production conditions. For example, the coefficient can be set to 1.3 when the electrode thickness is thick and 1.0 when the thickness is thin. Its function is to avoid excessive or insufficient cutting accuracy due to process differences and to ensure that the compensation value matches the actual needs.

[0204] For ease of understanding, please refer to Figure 10 This explanation is provided, but does not limit the scope of this application. Figure 10 This is a flowchart illustrating the correction process for some embodiments of the present invention. As an example, such as... Figure 10 As shown, the processor pre-implants a preset threshold (e.g., 0.5mm) and a preset value (e.g., 0). During the production process, the current cell electrode roll is transported along the conveyor belt to the detection area of ​​the correction sensor. The correction sensor calculates the offset of the material line before cutting in real time (e.g., 0.8mm or 0.4mm) and sends the data to the processor in real time.

[0205] Scenario 1: Material line offset > preset threshold (e.g., 0.8mm > 0.5mm):

[0206] Step 1: Calculate the clamping correction compensation value: The processor determines that if clamping correction is performed based on the actual offset (0.8mm), it will exceed the reasonable range of "not affecting the next cell" (preset threshold 0.5mm), causing excessive correction at the tail of the previous cell (i.e., the current cell), which in turn will cause abnormal offset of the anode head of the next cell. Therefore, the processor uses the preset threshold (0.5mm) as the clamping correction compensation value, which maximizes the use of clamping correction capability to correct part of the deviation of the current cell, while strictly controlling the correction amount within a safe range to avoid affecting the next cell.

[0207] Step 2: Calculate the cutter correction compensation value: The processor first calculates the difference between "material line offset - preset threshold" (0.8mm-0.5mm=0.3mm), and then combines it with the preset compensation coefficient (such as 1.1) to obtain the cutter correction compensation value (0.3mm×1.1=0.33mm), ensuring that the secondary correction can completely eliminate the offset.

[0208] Step 3: Command transmission: The processor sends the clamping correction compensation value (0.5mm) to the clamping correction mechanism, and at the same time temporarily stores the cutting correction compensation value (0.33mm), which is sent to the cutting correction mechanism after the current cell electrode is cut.

[0209] Scenario 2: Material line offset ≤ preset threshold (e.g., 0.4mm < 0.5mm):

[0210] Step 1: Calculate the clamping correction compensation value: The processor determines that clamping correction should be performed based on the actual offset (0.4mm). This not only completely corrects the current cell deviation but also falls within a reasonable range (≤0.5mm) that "does not affect the next cell," preventing abnormal anode head offset in the next cell. Therefore, the processor directly uses the wire offset (0.4mm) as the clamping correction compensation value, achieving dual assurance of accurate correction for the current cell and quality for the next cell.

[0211] Step 2: Calculate the cutter correction compensation value: The processor determines that the current cell has no remaining deviation after clamping and correction, and there is no need to start the cutter correction (to avoid invalid actions and increase mechanical wear). Therefore, the preset value (0) is used as the cutter correction compensation value, and the cutter correction mechanism remains in its initial state.

[0212] Step 3: Command transmission: The processor sends the clamping correction compensation value (0.4mm) to the clamping correction mechanism, and at the same time sends a command to the cutting correction mechanism that the compensation value is 0.

[0213] This embodiment calculates the difference between the material line offset and a preset threshold, and calculates the cutter correction compensation value based on the difference and the compensation coefficient, thereby adapting to different production conditions and improving the versatility of correction.

[0214] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A winding device, characterized in that, The winding equipment includes: a clamping and correction mechanism, a cutting mechanism, a winding mechanism, and a processor; the cutting mechanism includes a cutter and a cutting correction mechanism. The clamping and correction mechanism is used to perform initial correction on the electrode sheet according to the clamping and correction compensation value, wherein the clamping and correction compensation value is controlled within a reasonable range to avoid the clamping and correction compensation value being too large, which would cause abnormal displacement of the head of the next cell. The cutter is used to cut the electrode sheet when the winding mechanism winds the electrode sheet into a bare cell; The processor is used to calculate the cutter correction compensation value of the electrode sheet after cutting, and send the cutter correction compensation value to the cutter correction mechanism. The cutting blade correction mechanism is used to perform secondary correction on the cut electrode sheet according to the cutting blade correction compensation value, wherein the cutting blade correction compensation value is determined based on the offset that cannot be completely corrected by the clamping correction. The winding mechanism is used to wind up the corrected electrode sheet.

2. The winding equipment as described in claim 1, characterized in that, The cutter correction mechanism includes: a cutter pressure roller and a guide roller, wherein the cutter pressure roller and the guide roller are arranged opposite to each other; The cutting roller is used to press the electrode sheet onto the guide roller and moves according to the cutting correction compensation value to drive the guide roller and the cut electrode sheet to move, thereby correcting the deviation of the cut electrode sheet.

3. The winding equipment as described in claim 2, characterized in that, The roller is equipped with an elastic reset device at both ends; The elastic reset device is used to move the guide roller and the cut electrode sheet based on the movement of the cutter pressure roller, so as to correct the deviation of the cut electrode sheet.

4. The winding equipment as described in claim 2, characterized in that, The winding equipment further includes a needle winding turntable, which has multiple needle winding stations, and the winding mechanism is located at one of the needle winding stations.

5. The winding equipment as described in claim 4, characterized in that, The winding equipment further includes a turret roller, which comprises multiple rollers. The turret roller rotates synchronously with the rotation of the needle winding turntable to coordinate with the switching action of the needle winding station.

6. The winding apparatus as described in claim 5, characterized in that, The turret roller is mounted on the needle winding turntable via a rotating support component and is connected to the needle winding turntable via a transmission component. The number of turret rollers is equal to the number of workstations on the needle winding turntable.

7. The winding equipment as described in claim 2, characterized in that, The cutting mechanism is used to move from the preset cutting preparation position to the cutting working position corresponding to the electrode sheet; The cutter pressure roller is used to extend from the cutter mechanism when the cutter mechanism moves to the cutting position, and press the electrode sheet onto the roller; The cutting roller is used to retract the cutting mechanism after the winding mechanism has completed the winding of the electrode sheet after the correction. The cutting mechanism is used to return from the cutting working position to the preset cutting preparation position when the cutting pressure roller is retracted.

8. The winding apparatus according to any one of claims 1 to 7, characterized in that, The winding device further includes: an image acquisition unit, which is disposed between the cutter and the winding mechanism; The image acquisition unit is used to acquire an image of the cut electrode sheet within the cut area and send the image of the cut electrode sheet to the processor, wherein the cut area is the area between the cutter and the winding mechanism; The processor is further configured to determine the cutter correction compensation value of the cut electrode based on the electrode image, and send the cutter correction compensation value to the cutter correction mechanism.

9. The winding apparatus according to any one of claims 1 to 7, characterized in that, The winding equipment also includes: a deviation correction sensor; The correction sensor is used to acquire the offset of the electrode wire before cutting and send the offset of the electrode wire to the processor; The processor is further configured to calculate the clamping correction compensation value and the cutting correction compensation value based on the material line offset, and send the clamping correction compensation value to the clamping correction mechanism and the cutting correction compensation value to the cutting correction mechanism.

10. The winding apparatus as described in claim 9, characterized in that, The processor is further configured to, if the material line offset is greater than a preset threshold, use the preset threshold as a clamping correction compensation value, and determine a cutter correction compensation value based on the difference between the material line offset and the preset threshold. The processor is further configured to use the material line offset as a clamping correction compensation value and the preset value as a cutting tool correction compensation value if the material line offset is less than or equal to a preset threshold.

11. The winding apparatus as described in claim 10, characterized in that, The processor is also used to calculate the difference between the material line offset and the preset threshold. The processor is further configured to obtain the compensation coefficient for cutter deviation correction, and calculate the cutter deviation correction compensation value based on the difference and the compensation coefficient.

12. A winding method, characterized in that, include: When the electrode sheet is wound into a bare cell, the electrode sheet is corrected according to the clamping correction compensation value. The clamping correction compensation value is controlled within a reasonable range to avoid the next cell head from being abnormally offset due to the clamping correction compensation value being too large. The electrode sheet is then cut off, and the cutting correction compensation value of the electrode sheet after cutting is calculated. The cutting correction compensation value is determined based on the offset that the clamping correction cannot completely correct. The cut electrode sheet is then subjected to secondary correction based on the cutter correction compensation value, and the corrected electrode sheet is then wound up.

13. The winding method as described in claim 12, characterized in that, Before calculating the cutter correction compensation value for the electrode sheet after cutting, the following steps are also included: Obtain the electrode offset within the cutting area after cutting, and determine the cutter correction compensation value based on the electrode offset, wherein the cutting area is the region between the cutter location of the electrode and the winding location of the cut electrode.

14. The winding method as described in claim 12, characterized in that, Before calculating the cutter correction compensation value for the electrode sheet after cutting, the following steps are also included: Obtain the offset of the electrode line before cutting; The clamping correction compensation value and the cutting blade correction compensation value are calculated based on the material line offset.

15. The winding method as described in claim 14, characterized in that, The calculation of clamping correction compensation value and cutting blade correction compensation value based on the material line offset includes: If the material line offset is greater than a preset threshold, the preset threshold is used as the clamping correction compensation value, and the cutter correction compensation value is determined based on the difference between the material line offset and the preset threshold. If the material line offset is less than or equal to a preset threshold, the material line offset is used as the clamping correction compensation value, and the preset value is used as the cutting blade correction compensation value.

16. The winding method as described in claim 15, characterized in that, The step of determining the cutter correction compensation value based on the difference between the material line offset and the preset threshold includes: Calculate the difference between the material line offset and the preset threshold; Obtain the compensation coefficient for cutter deviation correction, and calculate the cutter deviation correction compensation value based on the difference and the compensation coefficient.

Images