Deviation correction system, deviation correction control method and pole piece production equipment

Abstract

The invention relates to a deviation rectification system, a deviation rectification control method and pole piece production equipment. The deviation rectifying system comprises a driving mechanism, a deviation rectifying roller, a sensing assembly and a controller. The roller surface of the deviation rectifying roller is used for being in contact with a material belt; the driving mechanism is in transmission connection with the deviation rectifying roller and is configured to drive the deviation rectifying roller to rotate around a virtual or fixed rotating center; the sensing assembly is used for acquiring deviation information of the material belt; and the controller is in communication connection with the driving mechanism and the sensing assembly and is used for controlling the driving mechanism to operate based on the deviation information so as to rectify the deviation of the material belt by adjusting the space posture of the deviation rectifying roller. According to the scheme provided by the invention, dynamic deviation correction is performed on the material belt through the single deviation correction roller, so that the defects of long roller entering distance and large deviation correction wrap angle in the related technology can be avoided, the size is smaller, the structure is more simplified, and the requirement on the mounting space can be reduced.

Description

Technical Field

[0001] This application relates to the field of battery electrode manufacturing equipment technology, specifically to a correction system, a correction control method, and electrode production equipment. Background Technology

[0002] In lithium-ion battery manufacturing cutting and stacking machines, flexible material strips such as electrodes or separators need to be continuously transported at high speed and with high precision along a predetermined path. To ensure the positioning accuracy of subsequent die-cutting and stacking processes, a correction system is usually configured at key nodes of the strip.

[0003] In related technologies, the correction structure includes standard single-roller correction and double-roller correction. Both types of structures require the correction roller to be placed between the nearest fixed guide roller before the entry roller and after the exit roller. The wrap angle of the material strip on the roller is not less than 90°. The single-roller scheme usually requires the entry roller distance to be ≥2 times the width and <3 times the width to ensure sufficient wrap angle and stability. The double-roller scheme, due to its large structural size, has higher requirements for the longitudinal and transverse installation space of the equipment.

[0004] Therefore, there is an urgent need to propose a solution with a simpler structure that can maintain stable correction performance even when the distance between the rollers and the entry roller is short. Summary of the Invention To address or partially address the problems existing in related technologies, this application provides a web correction system, a web correction control method, and an electrode production equipment. By using a single web correction roller to achieve dynamic web correction of the material strip, it can not only avoid the defects of long roller entry distance and large web correction wrap angle in related technologies, but also has a smaller size and simpler structure, thereby reducing the requirements for installation space.

[0005] The first aspect of this application provides a correction system, comprising: A correction roller, the roller surface of which is used to contact the material belt; A drive mechanism is connected to the correction roller and configured to drive the correction roller to rotate around a virtual or fixed rotation center. A sensing component is used to acquire the offset information of the material strip; The controller is communicatively connected to the drive mechanism and the sensing component, and is used to control the operation of the drive mechanism based on the offset information, so as to correct the material belt by adjusting the spatial attitude of the correction roller.

[0006] In one embodiment, the system further includes a motion synthesis mechanism, through which the drive mechanism is connected to the correction roller. The motion synthesis mechanism is configured to synthesize linear motions in at least two different directions into a rotation of the correction roller about the rotation center.

[0007] In one embodiment, the motion synthesis mechanism includes a first motion mechanism and a second motion mechanism, wherein the motion directions of the first motion mechanism and the second motion mechanism intersect. The power output end of the drive mechanism is connected to the first motion mechanism and / or the second motion mechanism. The power output end of the drive mechanism drives the first motion mechanism and the second motion mechanism to move synchronously through linear motion, so as to drive the correction roller to rotate around the rotation center.

[0008] In one embodiment, a linkage mechanism is also included. The first motion mechanism and the second motion mechanism are connected through the linkage mechanism. When the power output end of the drive mechanism drives the first motion mechanism or the second motion mechanism to move through linear motion, the linkage mechanism is used to drive the first motion mechanism and the second motion mechanism to move synchronously. Wherein, the first motion mechanism moves along a first direction, the second motion mechanism moves along a second direction, the first direction is parallel to the radial direction of the correction roller, and the second direction is parallel to the axial direction of the correction roller.

[0009] In one embodiment, the rotation center is a variable virtual rotation center, which is located at any point on the axis of the correction roller; wherein, the first motion mechanism is configured as an active motion mechanism connected to the drive mechanism, the second motion mechanism is configured as a driven motion mechanism, the first motion mechanism and the second motion mechanism are respectively located near the axial ends of the correction roller, and the position of the virtual rotation center is determined by the different strokes of the first motion mechanism and the second motion mechanism.

[0010] In one embodiment, the rotation center is a fixed rotation center, and the correction system further includes a rotary support structure for forming the fixed rotation center, the rotary support structure being disposed at any point on the axis of the correction roller; wherein, the first motion mechanism is configured as an active motion mechanism connected to the drive mechanism, the second motion mechanism is configured as a driven motion mechanism, and the first motion mechanism and the second motion mechanism are centrally disposed at one axial end of the correction roller.

[0011] In one embodiment, the system further includes a base plate and a bracket mounted on the base plate. The alignment roller is mounted on the bracket. The motion synthesis mechanism is disposed between the base plate and the bracket. The drive mechanism is used to drive the bracket to move the alignment roller. The bracket has a first floating support portion and a second floating support portion at its bottom, respectively located near the axial ends of the alignment roller, for buoyantly supporting the bracket at its bottom. And / or, The sensing component includes a first detection element and a second detection element, which are respectively disposed on both sides of the straightening roller along the thickness direction of the material strip edge, for detecting the lateral position information of the material strip; the controller is configured to control the operation of the drive mechanism according to the lateral position information detected by the first detection element and the second detection element.

[0012] A second aspect of this application provides a method for corrective control applied to the corrective system described in the first aspect above, comprising: Obtain the offset information of the material strip; The drive mechanism is controlled based on the offset information to drive the correction roller to rotate around a virtual or fixed rotation center, thereby correcting the material strip by adjusting the spatial posture of the correction roller.

[0013] In one embodiment, obtaining the offset information of the material strip includes: obtaining the lateral position information of the material strip detected by the first detection element and the second detection element; The method of controlling the operation of the drive mechanism based on the offset information includes: controlling the operation of the drive mechanism according to the lateral position information detected by the first detection element and the second detection element, so as to drive the first motion mechanism and the second motion mechanism to move synchronously through the power output end of the drive mechanism, thereby driving the correction roller to rotate around the rotation center.

[0014] A third aspect of this application provides an electrode production apparatus, including the correction system described in the first aspect above, wherein the electrode production apparatus performs the method described in the second aspect above during operation.

[0015] The technical solution provided in this application may include the following beneficial effects: The web-correcting system provided in this application embodiment has a drive mechanism connected to the web-correcting roller, configured to drive the web-correcting roller to rotate around a virtual or fixed rotation center. A controller is communicatively connected to the drive mechanism and the sensing component, used to control the operation of the drive mechanism based on the offset information, so as to correct the web-strip by adjusting the spatial attitude of the web-correcting roller. With this configuration, when the web-strip experiences lateral offset, the drive mechanism can adjust the attitude of the web-correcting roller in real time based on the detected offset information, thereby achieving dynamic web-correction through a single web-correcting roller. This not only avoids the defects of long roller entry distance and large web-correcting wrap angle in related technologies, but also has a smaller size and simpler structure, thus reducing the requirements for installation space.

[0016] Furthermore, in the solution provided in this application, the motion synthesis mechanism includes a first motion mechanism and a second motion mechanism, wherein the motion directions of the first motion mechanism and the second motion mechanism intersect. The power output end of the drive mechanism is connected to the first motion mechanism and / or the second motion mechanism. The power output end of the drive mechanism drives the first motion mechanism and the second motion mechanism to move synchronously through linear motion, thereby driving the correction roller to rotate around the rotation center. With this configuration, the single power output by the drive mechanism drives the support of the correction roller to perform deterministic spatial movement through the geometric constraint formed by the intersection of the motion directions of the first motion mechanism and the second motion mechanism. This, in turn, drives the correction roller to perform dynamic rotation around the rotation center, which can dynamically change according to the material belt offset. This ensures that the contact area between the roller surface of the correction roller and the material belt always maintains a basically unchanged spatial coordinate between the inlet and outlet points, that is, the axial direction of the correction roller is always perpendicular to the travel direction of the material belt. Therefore, the path length from the upstream guide roller to the feed point of the correction roller, the path length from the discharge point of the correction roller to the downstream guide roller, and the wrap angle of the material strip on the correction roller remain stable throughout the correction stroke. This avoids instantaneous tension fluctuations caused by sudden changes in path length and also avoids the limitation in related technologies that the feed distance must meet the requirement of "more than twice the width". This significantly improves the overall layout freedom and process adaptability of the correction system.

[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0018] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0019] Figure 1 This is a schematic diagram of the structure of a correction system shown in one embodiment of this application; Figure 2 This is an assembly schematic diagram of a correction system according to an embodiment of this application; Figure 3 This is a schematic diagram of the structure of a correction system shown in another embodiment of this application; Figure 4 This is an assembly schematic diagram of a correction system shown in another embodiment of this application; Figure 5 This is a schematic flowchart illustrating a deviation control method according to an embodiment of this application; Figure 6 This is a flowchart illustrating a correction control method according to another embodiment of this application.

[0020] Figure label: 100. Correction system; 110. Drive mechanism; 111. Drive component; 112. Power output end; 120. Correction roller; 1201. Roller surface; 1202. Tension sensor; 121. Support; 122. Vertical plate; 123. Horizontal plate; 124. Base plate; 130. Sensing component; 131. First detection element; 132. Second detection element; 140. First motion mechanism; 150. Second motion mechanism; 160. First floating support; 170. Second floating support. Detailed Implementation

[0021] Preferred embodiments of the present application will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present application are shown in the drawings, it should be understood that the present application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0022] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0023] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0024] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0025] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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 this application according to the specific circumstances.

[0026] In related technologies, the correction structure includes standard single-roller correction and double-roller correction. Both types of structures require the correction roller to be positioned between the nearest fixed guide roller before the input roller and after the output roller, with the wrap angle of the material strip on the roller not less than 90°. The single-roller scheme typically requires an input roller distance ≥ 2 times the width and < 3 times the width to ensure sufficient wrap angle and stability. The double-roller scheme, due to its larger structural size, has higher requirements for both longitudinal and transverse installation space. To address these issues, this application provides a correction system, correction control method, and electrode production equipment. This system achieves dynamic correction of the material strip using a single correction roller, which not only avoids the defects of long input roller distances and large correction wrap angles in related technologies but also has a smaller size and simpler structure, thereby reducing the requirements for installation space.

[0027] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0028] See Figure 1 and Figure 2 This application proposes a deviation correction system 100, which includes a drive mechanism 110, a deviation correction roller 120, a sensing component 130, and a controller. The deviation correction roller 120 is used to contact the material belt. The drive mechanism 110 is connected to the deviation correction roller 120 and is configured to drive the deviation correction roller 120 to rotate around a virtual or fixed rotation center. The sensing component 130 is used to acquire the deviation information of the material belt. The controller is communicatively connected to the drive mechanism 110 and the sensing component 130 and is used to control the operation of the drive mechanism 110 based on the deviation information, so as to correct the deviation of the material belt by adjusting the spatial posture of the deviation correction roller 120.

[0029] In this embodiment, the drive mechanism 110 refers to an execution unit that can output controllable power and convert it into mechanical motion. Its form includes, but is not limited to, electric cylinders, servo motors with lead screw modules, linear motors, gear rack mechanisms, or pneumatic / hydraulic actuators.

[0030] The correction roller 120 is a cylindrical rotating body structure. Its roller surface 1201 can be surface treated to improve the friction coefficient and wear resistance with the material belt. The roller surface 1201 directly contacts the moving material belt and applies normal force and tangential correction force. The axial length of the correction roller 120 can be freely set according to the width of the material belt.

[0031] The sensing component 130 refers to a sensing system used to acquire the spatial position of the material belt in the direction perpendicular to the travel direction in real time. Its function is to convert the physical displacement of the edge or center line of the material belt into an electrical signal that can be recognized and processed by the controller. The sensing component 130 can be any one or a combination of photoelectric sensors, CCD vision sensors, laser triangulation sensors, ultrasonic displacement sensors or capacitive edge detectors.

[0032] In some embodiments, the sensing component 130 includes a first detection element 131 and a second detection element 132, which are respectively disposed on both sides of the correction roller 120 along the thickness direction of the material strip edge, for detecting the lateral position information of the material strip. The controller is configured to control the drive mechanism 110 according to the lateral position information detected by the first detection element 131 and the second detection element 132. The controller calculates the lateral position information output by the first detection element 131 and the second detection element 132 in real time, and performs closed-loop adjustment based on the calculation result, so that the response direction and amplitude of the drive mechanism 110 are always dynamically matched with the correction requirements.

[0033] In this embodiment, the first detection element 131 and the second detection element 132 constitute a through-beam sensor assembly, which can be arranged in pairs on one or both edges of the material strip. They can be respectively mounted on the upper and lower parts of the mounting plate with notches or on both sides of the thickness of the material strip. The notches are designed to avoid the edge of the material strip and form a detection channel. Alternatively, the first detection element 131 and the second detection element 132 can be respectively mounted on two independent components. The gap between the first detection element 131 and the second detection element 132 forms a detection channel, ensuring that the material strip can pass smoothly through the detection channel between the first detection element 131 and the second detection element 132.

[0034] The first detection element 131 and the second detection element 132 continuously maintain a beam of light passing through the detection channel. When the material belt shifts laterally, the blocking state of the light curtain changes accordingly. The system can detect the lateral shift information of the material belt in real time based on the change in the blocking state. In this embodiment, in the initial state or non-correction state, the edge of the material belt is perpendicular to the correction roller. When the material belt shifts axially, the lateral position information is also the position information of the edge of the material belt along the axial direction of the correction roller. The first detection element 131 and the second detection element 132 can detect the shift information of the edge of the material belt in real time.

[0035] The controller in this embodiment can be an embedded control unit with real-time computing capabilities. The controller can have a built-in PID or fuzzy adaptive algorithm, receive the offset signal of the sensing component 130, and generate the target displacement command of the drive mechanism 110 through calculation.

[0036] The rotation center refers to a geometric point located on the axis of the straightening roller 120 or its extension line or parallel to the axis of the straightening roller 120. This point can be a physically existing support point or a theoretical point without physical support, defined only by kinematic relationships (e.g., the instantaneous rotation center synthesized by the cooperative motion of two orthogonal motion mechanisms).

[0037] When the rotation center is fixed, its position can be set at the center of the end face of one end of the axial direction of the correction roller 120, the middle of the roller body, or any position on the axial extension line. When the rotation center is a virtual rotation center, its position changes dynamically with the output state of the drive mechanism 110. This design causes the center of the correction roller 120 to generate a definite translation component when it rotates. This component cancels the displacement increment of the feed point and the discharge point on the correction roller caused by the rotation, thereby ensuring the stability of the spatial coordinates of the feed point and the discharge point.

[0038] The solution provided in this application embodiment detects the position difference between the upstream and downstream edges when the material belt deviates laterally. The controller calculates the motion parameters of the correction roller 120 accordingly, and the drive mechanism 110 synchronously adjusts the attitude and position of the correction roller 120. This stabilizes the spatial position of the material belt at the inlet and outlet points when it passes the correction roller 120. This not only avoids the defects of long inlet distance and large correction wrap angle in related technologies, but also has a smaller size and simpler structure, thereby reducing the requirements for installation space.

[0039] In some embodiments, the drive mechanism 110 is connected to the correction roller 120 via a motion synthesis mechanism, which is configured to synthesize linear motions in at least two different directions into a rotation of the correction roller 120 about a rotation center. The motion synthesis mechanism uses specific geometric constraints (such as fixed intersection points, link length ratios, and slider coupling relationships) to ensure that the two linear motion components satisfy the kinematic equations for rotation about a specified rotation center. Specific implementations of the motion synthesis mechanism include, but are not limited to: a double-screw-cross-slide structure (the first screw drives the X-axis slide, the second screw drives the Y-axis slide, and the correction roller 120 support 121 is fixed to the intersection of the slides); a single-screw drive + differential gear linkage double-guide rail structure (the screw output is distributed to two mutually perpendicular sets of guide rails via a gear system); or a belt and linkage combination mechanism.

[0040] In this context, at least two linear movements in different directions refer to two independent translational movements with an angle greater than 0° and less than 180° between their directions. These movements can be perpendicular to each other, or they can be acute or obtuse angles; this application does not limit this. In this embodiment, the non-parallelism of the two directions, combined with the mechanical constraints between the moving parts, forces the correction roller 120 to rotate around a virtual rotation center.

[0041] The rotation of the straightening roller 120 around the rotation center does not refer to the roller body rotating around its own axis, but rather to the oscillating motion of the entire straightening roller 120 as a rigid body, with its axis as the reference axis, adjusting its posture around the rotation center. It is worth noting that this rotation center can be a solid structure or a virtual point, and its position can be arbitrarily set along the roller axis according to the space requirements of the equipment.

[0042] In some embodiments, the motion synthesis mechanism includes a first motion mechanism 140 and a second motion mechanism 150, the motion directions of the first motion mechanism 140 and the second motion mechanism 150 intersect, the power output end 112 of the drive mechanism 110 is connected to the first motion mechanism 140 and / or the second motion mechanism 150, and the power output end 112 of the drive mechanism 110 drives the first motion mechanism 140 and the second motion mechanism 150 to move synchronously through linear motion, so as to drive the correction roller 120 to rotate around the rotation center.

[0043] In some embodiments, the correction system may further include a base plate 124 and a bracket 121 mounted on the base plate 124, a correction roller 120 mounted on the bracket 121, a motion synthesis mechanism disposed between the base plate 124 and the bracket 121, and a drive mechanism 110 used to drive the correction roller 120 to move by driving the bracket 121.

[0044] The base plate 124 is fixed to the frame of the correction system 100. The integral structure composed of the correction roller 120 and the support 121 is installed on the base plate 124 through a motion synthesis structure, and can move relative to the base plate 124 as a whole. The first motion mechanism 140 and the second motion mechanism 150 are both installed between the cross plate 123 of the support 121 and the base plate 124.

[0045] The support 121 is the core rigid component that supports the straightening roller 120 and transmits motion. Its structure is a plate frame structure with sufficient bending and torsional stiffness. The support 121 has positioning holes and locking flanges for mounting the bearing seats at both ends of the straightening roller 120, and also integrates mechanical interfaces with the moving parts of the first motion mechanism 140 and the second motion mechanism 150. The straightening roller 120 is rigidly mounted in the support 121 via bearings at both ends. Bearing mounting positions are provided at both ends of the roller body of the straightening roller 120 for support on the support 121. Specifically, the support 121 includes a horizontal plate 123 and two vertical plates 122 connected to both ends of the horizontal plate 123. The straightening roller 120 is mounted between the two vertical plates 122, forming an integral structure with the support 121 and moving together.

[0046] The drive mechanism 110 in this embodiment includes a drive member 111. To simplify the structure, there can be only one drive member. The drive member 111 can be an electric cylinder, a servo motor, a pneumatic cylinder, etc. The power output end 112 of the drive member 111 is used to output a single linear motion. This linear motion first acts on the moving part of the first motion mechanism 140, such as the slider of the first motion mechanism 140. Under the constraint of the guide member of the first motion mechanism 140, it is converted into a linear displacement along its motion direction. The guide member can be, for example, a guide rail. This displacement is transmitted to the moving part of the second motion mechanism 150 through the bracket 121 and is guided and constrained in the opposite direction to constrain the posture of the bracket 121, so that the moving part of the first motion mechanism 140 produces an adaptive motion.

[0047] In some embodiments, tension sensors 1202 are provided at both axial ends of the straightening roller 120 to monitor and prevent strip wrinkling or stretching caused by the straightening action. After receiving the tension difference signal from both sides, the controller can slightly adjust the rotation angle or translation amount of the straightening roller 120 to eliminate the tension difference and ensure that the strip is always in a uniformly tensioned state during the straightening process. In another embodiment, the tension sensor 1202 is used to link the unwinding or rewinding tension control system for global tension compensation.

[0048] Due to the strict requirements on the entry distance and wrap angle of related single-roller web guiding technologies, the system itself is relatively insensitive to changes in tension. However, the web guiding system of this application can not only achieve web guiding based on positional deviations in scenarios with compact installation spaces, but also optimize the parameters of the web guiding action according to the tension state, making the entire web guiding system operate more smoothly and accurately.

[0049] In the technical solution of this application embodiment, the power output by the drive mechanism 110, through the geometric constraint formed by the intersection of the motion directions of the first motion mechanism 140 and the second motion mechanism 150, drives the support 121 to perform deterministic spatial motion, thereby driving the correction roller 120 to perform a compound rotation around the rotation center. Due to the rigid connection between the support 121 and the moving parts of the first motion mechanism 140 and the second motion mechanism 150, and the non-parallelism of the first motion mechanism 140 and the second motion mechanism 150, the contact area between the roller surface 1201 and the material belt of the correction roller 120 during the attitude adjustment process always maintains the spatial coordinate base of the infeed point and the outlet point. Since the axis of the correction roller 120 remains constant, it is always perpendicular to the direction of the material strip's travel. Therefore, the path length from the upstream fixed guide roller to the infeed point, the path length from the outlet point to the downstream fixed guide roller, and the wrap angle of the material strip on the correction roller 120 remain stable throughout the correction stroke. This avoids instantaneous tension fluctuations caused by sudden changes in path length and eliminates the limitation in related technologies that the infeed distance must meet "more than twice the width". This allows the infeed distance of the correction system 100 to be shorter or to be unrestricted, and it can be deployed in stations with compact electrode strip space in the cutting and stacking machine, thereby significantly improving the overall layout freedom and process adaptability of the equipment.

[0050] In some embodiments, the correction system further includes a linkage mechanism. The first motion mechanism 140 and the second motion mechanism 150 are connected by a linkage mechanism. When the power output end 112 of the drive mechanism 110 drives the first motion mechanism 140 or the second motion mechanism 150 to move through linear motion, the linkage mechanism is used to drive the first motion mechanism 140 and the second motion mechanism 150 to move synchronously. The motion direction of the first motion mechanism 140 is along the first direction X, and the motion direction of the second motion mechanism 150 is along the second direction Y. The first direction X is parallel to the radial direction of the correction roller 120, and the second direction Y is parallel to the axial direction of the correction roller 120.

[0051] The linkage mechanism refers to the mechanical linkage device set between the first motion mechanism 140 and the second motion mechanism 150. It is used to receive the single power output from the drive mechanism 110 and convert it into motion output with coordinated direction, amplitude and phase required by the first motion mechanism 140 and the second motion mechanism 150 through kinematic relationship.

[0052] The linkage mechanism of this application ensures motion synchronization through mechanical configuration. Specific optional solutions may include: 1. Gear and rack linkage structure: The output shaft of the drive motor is connected to the drive gear, which meshes with both the first rack fixed to the slider of the first motion mechanism 140 and the second rack fixed to the slider of the second motion mechanism 150. The two racks are arranged in an L-shape orthogonally; 2. Synchronous belt-pulley differential mechanism: A closed-loop synchronous belt is wound between three pulleys. One drive pulley is driven by the drive mechanism 110, and the other two driven pulleys are respectively fixed to the rotating shafts of the X-axis and Y-axis sliders. The predetermined motion ratio is achieved by adjusting the difference in pulley diameter or the displacement of the tensioner; 3. Universal joint-cross slider coupling mechanism: The drive shaft is connected to the center of the cross slider via a universal joint. The two shafts of the cross slider are respectively embedded in the X-axis and Y-axis sliding grooves, directly decomposing the input rotational motion into orthogonal linear motion.

[0053] In this embodiment, the drive mechanism 110 has a single power output, which means that the entire system is equipped with only one active power source, such as a servo motor, an electric cylinder, a pneumatic actuator, or a linear motor. This active power source does not perform electrical signal branch control, nor is it equipped with a separate second set of drive hardware; its output form can be rotary motion, such as the rotation of a motor shaft; or it can be linear motion, such as the extension and retraction of an electric cylinder piston rod.

[0054] The technical solution of this application embodiment can drive the first motion mechanism 140 and the second motion mechanism 150 to move synchronously and in coordination by relying on a single drive source of the drive mechanism 110, so that the correction roller 120 can spontaneously complete the compound rotation around the rotation center. Since the motion of the two motion mechanisms is coupled and constrained by the same mechanical chain, it not only eliminates the timing asynchrony, acceleration inconsistency and position feedback delay under independent control of multiple drive components in related technologies, but also simplifies the structure and equipment volume.

[0055] See Figure 1 In some embodiments, the first direction X is parallel to the travel direction of the material belt, and the second direction Y is parallel to the axial direction of the straightening roller 120, and the two are arranged perpendicular to each other. The first direction X being parallel to the travel direction of the material belt means that the main displacement axis of its moving parts, such as the guide rail, slider, lead screw and nut pair, or linear motor mover, is consistent with the material belt conveying direction. The second direction Y being parallel to the axial direction of the straightening roller 120 means that its guide motion axis coincides with or is parallel to the central axis of the straightening roller 120.

[0056] In this configuration, the first direction X and the second direction Y form a 90° angle in three-dimensional space. Specifically, the first motion mechanism 140 is installed on the horizontal plane of the base plate 124 and extends along the Y direction, while the second motion mechanism 150 is installed on the same base plate 124 or bracket 121 and extends along the X direction, ensuring that the two are spatially orthogonal.

[0057] See Figure 1 and Figure 2 In some embodiments, the rotation center is a variable virtual rotation center, located at any point on the axis of the correction roller. The first motion mechanism 140 is configured as an active motion mechanism connected to the power output end 112 of the drive mechanism 110, and the second motion mechanism 150 is configured as a driven motion mechanism. The first motion mechanism 140 and the second motion mechanism 150 are respectively located near the axial ends of the correction roller, and the position of the virtual rotation center is determined by the different strokes of the first motion mechanism 140 and the second motion mechanism 150.

[0058] In this embodiment, the rotation center can be any point on the axis, the extension line of the axis, or the parallel line of the axis of the correction roller 120. When the correction roller 120 rotates around the rotation center, the center of the correction roller 120 will undergo a significant translational displacement as it rotates. This translational movement can compensate for the positional changes of the feed point and the discharge point caused by the rotation.

[0059] Due to the coordinated operation of the first motion mechanism 140 and the second motion mechanism 150, the spatial positions of the feed point and the discharge point remain unchanged during the correction process. Consequently, the material strip always contacts and leaves the correction roller 120 from two fixed points in space. Furthermore, because the spatial positions of the feed point and the discharge point are stable, the path length from the upstream fixed roller to the feed point, and the exit path length from the discharge point to the downstream fixed roller, remain constant throughout the correction process. This effectively reduces the path length from the upstream fixed roller to the feed point in related technologies, especially in single-roller correction scenarios.

[0060] See Figure 3 and Figure 4 In some embodiments, the rotation center is a fixed rotation center, and the correction system 100 further includes a rotary support structure for forming the fixed rotation center, which is located at any point on the axis of the correction roller 120. The first motion mechanism 140 is configured as an active motion mechanism connected to the drive mechanism 110, and the second motion mechanism 150 is configured as a driven motion mechanism. The first motion mechanism 140 and the second motion mechanism 150 are concentrated at one axial end of the correction roller 120.

[0061] The rotary support structure refers to a mechanical interface component fixedly mounted on the frame and forming a defined kinematic pair with one end of the alignment roller 120. Specific forms of the rotary support structure include, but are not limited to: deep groove ball bearings with bearing housings, angular contact ball bearing assemblies, crossed roller bearings, ball joints, self-lubricating bushings with pins, or precision sliding bearings with retaining rings. The end of the alignment roller 120 without the rotary support structure establishes a power transmission relationship with the power output end 112 of the drive mechanism 110 through a mechanical connector. When the drive mechanism 110 applies a force, the alignment roller 120 rotates around its rotation center.

[0062] In some embodiments, the bottom of the bracket 121 is provided with a first floating support portion 160 and a second floating support portion 170, respectively disposed near the axial ends of the correction roller 120. Alternatively, the first floating support portion 160 is disposed near the drive mechanism 110, and the second floating support portion 170 is disposed away from the drive mechanism 110. The first floating support portion 160 and the second floating support portion 170 are used to levitably support the bracket 121 at the bottom of the bracket 121. When the correction roller 120 rotates, the two ends of the correction roller 120 can move stably under the guiding effect of the floating support of the first floating support portion 160 and the second floating support portion 170, thereby avoiding the defects of poor correction accuracy caused by the vibration or unstable operation of the correction roller 120.

[0063] In some specific embodiments, the first floating support 160 and the second floating support 170 can be a mating structure of a guide rail and a rolling element (e.g., a bearing assembly). A guide rail can be provided at the bottom of 121, the bearing's shaft is fixed relative to the floor, and the bearing's rotating surface is in close contact with or restricted to movement on the guide rail, thereby achieving guidance. Specifically, the guide rail can be a profile with a guide groove, the rolling element is housed within the guide groove, and can roll along the groove wall; furthermore, since the correction roller 120 rotates around its rotation center, the guide groove can be arc-shaped.

[0064] See Figure 4 In some embodiments, when the rotation center is a fixed rotation center, the second floating support 170 at the end away from the drive mechanism 110 can serve as a fixed rotation center. When the power output end 112 of the drive mechanism 110 outputs linear power to the first motion mechanism 140, the second motion mechanism 150 moves synchronously under the action of the linkage mechanism, causing the drive correction roller 120 to rotate around the second floating support 170, thereby achieving correction.

[0065] In related technologies, in continuous conveyor belt lithium battery manufacturing equipment such as integrated cutting and stacking machines, traditional web guiding control methods rely on a single rotation mode with a fixed rotation center located at the geometric center of the guiding roller. When the rotation center coincides with the geometric center, since the distance from the rotation point to both sides of the object is equal, a large rotation angle is required to observe a significant displacement change. However, when the rotation center is fixed and biased to one side of the object, the lever arm length from the rotation point to the far end increases significantly. At this time, even a small rotation angle will produce a large displacement, making it difficult to effectively control the web guiding accuracy. If the infeed distance is configured to be greater than twice the width according to the standard single-roller web guiding requirements, the longitudinal dimension of the entire machine will increase significantly. At the same time, if the wrap angle is too small, the material strip is prone to detaching from the roller surface, thus affecting the web guiding effect. If the wrap angle is too large, it may cause damage and deformation of the material strip due to uneven tension distribution, and may also lead to a decrease in the sensitivity of the web guiding response.

[0066] The technical solution of this application embodiment achieves dynamic stability of the spatial positions of the feed point and the discharge point by setting a compound motion of the correction roller around the rotation center. The length of the material strip after entering and exiting the roller no longer needs to be strictly limited to a specific length, and the wrap angle does not need to be ≥90°. No longer restricted by the distance limitation of "more than twice the width", the overall structure of the equipment can be optimized more freely, avoiding tension fluctuations caused by length changes, making the material strip run more smoothly, and adapting to a wider range of process requirements and material types. It is particularly beneficial for tension-sensitive ultra-thin materials.

[0067] The above describes the correction system 100 provided in this application. Accordingly, this application also provides a correction control method, which is applied to the correction system 100 in any of the above embodiments.

[0068] See Figure 5 The corrective control method includes the following steps: Step S110: Obtain the offset information of the material strip.

[0069] In this step, the offset information of the material strip refers to the positional deviation of the material strip edge relative to the preset reference center line in the lateral direction (i.e., perpendicular to the material strip's travel direction). This deviation information is collected in real time by the sensing component 130 and output to the controller. The sensing component 130 includes a first detection element 131 and a second detection element 132, which are respectively disposed on both sides of the correction roller 120 along the thickness direction of the material strip edge. The first detection element 131 and the second detection element 132 continuously maintain a beam of light passing through the detection channel. When the material strip shifts laterally, the blocking state of the light curtain changes accordingly. The system can detect the lateral offset information of the material strip in real time based on the change in the blocking state.

[0070] Step S120: Control the operation of the drive mechanism based on the offset information, so as to drive the correction roller to rotate around a virtual or fixed rotation center, thereby correcting the material strip by adjusting the spatial posture of the correction roller.

[0071] In this step, based on the offset information, the controller executes a closed-loop feedback control algorithm. The position deviation information obtained in step one is used as an input variable, processed by a PID or fuzzy adaptive algorithm to generate the target motion parameters for the drive mechanism 110, ensuring that the output command matches the actual composite motion trajectory. The controller drives the mechanism 110 to send motion commands, and the drive mechanism 110 outputs mechanical power in response. Under the action of the drive mechanism 110, the correction roller 120 simultaneously translates and rotates; its motion trajectory is equivalent to an instantaneous rotation around a fixed or virtual center of rotation in space.

[0072] Adjusting the spatial attitude of the correction roller 120 refers to changing the spatial angle between the axis of the correction roller 120 and the direction of the material belt's travel, as well as the contact angle between the normal of the roller surface 1201 and the surface of the material belt. This causes the material belt to be subjected to a lateral force pointing towards the center line in the contact area. This lateral force continues to act on the material belt, causing its lateral velocity component to be canceled out, so that the material belt eventually returns to the reference center line, thereby realizing the correction process.

[0073] The technical solution of this application controls the composite rotation of the correction roller 120 around a variable or fixed rotation center, so that the spatial position of the feed point and the discharge point is stable during the material belt movement, the change in path length is controlled within a small range, and the fluctuation of the material belt wrap angle is smaller.

[0074] See Figure 6 In some specific embodiments, the deviation correction control method of this application includes the following steps: Step S210: Obtain the lateral position information of the material strip detected by the sensing component.

[0075] In this step, the lateral position information of the material strip on the correction roller 120 is obtained respectively. A first detection element 131 and a second detection element 132 are set on both sides of the correction roller 120 along the thickness direction of the material strip edge for use in real time to collect the lateral displacement information of the material strip edge. Step S220: Generate drive instructions based on the lateral position information of the material strip.

[0076] In this step, the lateral position information output by the first detection element 131 and the second detection element 132 is calculated by the controller to obtain the real-time deviation, and a drive command containing motion timing, displacement amplitude and direction constraints is generated based on the deviation.

[0077] Step S230: Control the drive mechanism to operate according to the drive command, so as to drive the first motion mechanism and the second motion mechanism to move synchronously through the power output end 112 of the drive mechanism, thereby driving the correction roller to rotate around the rotation center.

[0078] In this step, the controller outputs a drive command to the drive mechanism 110, which drives the correction roller 120 to perform a compound motion around a virtual or fixed rotation center located on its axis or its extension, thereby changing its spatial attitude. The drive mechanism 110 is a single power source outputting a single-degree-of-freedom linear driving force. It does not directly generate rotational output but serves as the initial power input for the motion synthesis mechanism, which combines linear motions in at least two different directions into the rotation of the correction roller 120.

[0079] The technical solution of this application uses the real-time deviation of the lateral position information as the error input of the closed-loop control, so that the correction system 100 has the ability to identify and respond to complex offset forms such as local twisting, swaying and non-uniform stretching of the material belt. When the correction roller 120 deflects due to the difference feedback, the coordinate fluctuation of its inlet and outlet points in space is controlled within a controllable range, thereby maintaining the constant length of the material belt path and the wrap angle, thus avoiding the tension change and material belt trajectory change caused by the correction action.

[0080] Accordingly, this application also provides an electrode production apparatus, which includes the correction system 100 as described in the above embodiment. The electrode production apparatus can be a cutting and stacking integrated machine or an electrode transfer device. The electrode production apparatus includes a control unit, which includes a controller and a storage medium. The storage medium stores an application program containing the methods described above. When the controller is running, it can execute the methods described in the above embodiment.

[0081] The electrode production equipment of this application embodiment uses a single drive component 111 and a single correction roller 120. The linear drive is precisely mapped to an equivalent rotation around an external rotation center through a motion synthesis mechanism, which stabilizes the spatial position of the feed point and the discharge point. This avoids the limitations of related technologies, such as "the distance between the feed rollers must be more than twice the width of the material strip" and "the wrap angle must be ≥90°". The correction system 100 of this application enables the electrode manufacturing equipment to achieve a compact belt layout within a limited equipment space and significantly suppresses instantaneous tension fluctuations caused by sudden path changes, thereby improving the dimensional accuracy of lithium electrode sheet transmission.

[0082] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A deviation correction system, characterized in that, include: A correction roller, the roller surface of which is used to contact the material belt; A drive mechanism is connected to the correction roller and configured to drive the correction roller to rotate around a virtual or fixed rotation center. A sensing component is used to acquire the offset information of the material strip; The controller is communicatively connected to the drive mechanism and the sensing component, and is used to control the operation of the drive mechanism based on the offset information, so as to correct the material belt by adjusting the spatial attitude of the correction roller.

2. The correction system according to claim 1, characterized in that: It also includes a motion synthesis mechanism, through which the drive mechanism is connected to the correction roller, the motion synthesis mechanism being configured to synthesize linear motions in at least two different directions into a rotation of the correction roller about the rotation center.

3. The correction system according to claim 2, characterized in that: The motion synthesis mechanism includes a first motion mechanism and a second motion mechanism, wherein the motion directions of the first motion mechanism and the second motion mechanism intersect. The power output end of the drive mechanism is connected to the first motion mechanism and / or the second motion mechanism. The power output end of the drive mechanism drives the first motion mechanism and the second motion mechanism to move synchronously through linear motion, so as to drive the correction roller to rotate around the rotation center.

4. The correction system according to claim 3, characterized in that: It also includes a linkage mechanism, in which the first motion mechanism and the second motion mechanism are connected by the linkage mechanism. When the power output end of the drive mechanism drives the first motion mechanism or the second motion mechanism to move through linear motion, the linkage mechanism is used to drive the first motion mechanism and the second motion mechanism to move synchronously. Wherein, the first motion mechanism moves along a first direction, the second motion mechanism moves along a second direction, the first direction is parallel to the radial direction of the correction roller, and the second direction is parallel to the axial direction of the correction roller.

5. The correction system according to any one of claims 3 or 4, characterized in that: The rotation center is a variable virtual rotation center, which is located at any point on the axis of the correction roller; wherein, the first motion mechanism is configured as an active motion mechanism connected to the drive mechanism, the second motion mechanism is configured as a driven motion mechanism, the first motion mechanism and the second motion mechanism are respectively set close to the axial ends of the correction roller, and the position of the virtual rotation center is determined by the different strokes of the first motion mechanism and the second motion mechanism.

6. The correction system according to any one of claims 3 or 4, characterized in that: The rotation center is a fixed rotation center, and the correction system further includes a rotation support structure for forming the fixed rotation center. The rotation support structure is located at any point on the axis of the correction roller. The first motion mechanism is configured as an active motion mechanism connected to the drive mechanism, and the second motion mechanism is configured as a driven motion mechanism. The first motion mechanism and the second motion mechanism are centrally located at one axial end of the correction roller.

7. The correction system according to claim 2, characterized in that: It also includes a base plate and a bracket mounted on the base plate, the alignment roller is mounted on the bracket, the motion synthesis mechanism is disposed between the base plate and the bracket, and the drive mechanism is used to drive the bracket to move the alignment roller; wherein, the bottom of the bracket is provided with a first floating support and a second floating support, respectively disposed near the axial ends of the alignment roller, for buoyantly supporting the bracket at the bottom; and / or, The sensing component includes a first detection element and a second detection element, which are respectively disposed on both sides of the straightening roller along the thickness direction of the material strip edge, for detecting the lateral position information of the material strip; the controller is configured to control the operation of the drive mechanism according to the lateral position information detected by the first detection element and the second detection element.

8. A method for correcting deviation control applied to a deviation correction system as described in any one of claims 1-7, characterized in that, include: Obtain the offset information of the material strip; The drive mechanism is controlled based on the offset information to drive the correction roller to rotate around a virtual or fixed rotation center, thereby correcting the material strip by adjusting the spatial posture of the correction roller.

9. The method according to claim 8, characterized in that, The process of obtaining the offset information of the material strip includes: obtaining the lateral position information of the material strip detected by the first detection element and the second detection element; The method of controlling the operation of the drive mechanism based on the offset information includes: controlling the operation of the drive mechanism according to the lateral position information detected by the first detection element and the second detection element, so as to drive the first motion mechanism and the second motion mechanism to move synchronously through the power output end of the drive mechanism, thereby driving the correction roller to rotate around the rotation center.

10. An electrode production equipment, characterized in that, Includes the correction system as described in any one of claims 1-7; when the electrode production equipment is in operation, it performs the method as described in any one of claims 8 or 9.

Images