Pole piece non-contact electromagnetic deviation correction system and pole piece deviation correction method thereof

Abstract

The invention relates to a pole piece non-contact electromagnetic deviation correction system and a pole piece deviation correction method thereof. The pole piece non-contact electromagnetic deviation correction system comprises an electromagnetic deviation correction module, a detection module, a controller and an execution mechanism, the electromagnetic deviation rectifying module comprises two deviation rectifying devices which are arranged in the width direction of the pole piece in a spaced mode, each deviation rectifying device comprises a deviation rectifying channel for the pole piece to pass through and at least two deviation rectifying mechanisms, and in the same deviation rectifying device, the deviation rectifying channel is located between the two deviation rectifying mechanisms; the deviation rectifying mechanism can form a traveling wave magnetic field in the deviation rectifying channel, so that the pole piece penetrating through the deviation rectifying channel is subjected to magnetic force back to the other deviation rectifying channel; the detection module is used for detecting the relative angle between the pole piece in the deviation correction channel and the deviation correction device and the transverse offset in the width direction; the controller generates a control quantity according to the detection data; and the executing mechanism adjusts the intensity of the traveling wave magnetic field generated by the deviation correcting mechanism according to the control quantity. According to the scheme provided by the invention, the pole piece can be rectified under the condition that the pole piece is not contacted.

Description

Technical Field

[0001] The present application relates to the technical field of pole piece processing, and particularly relates to a non-contact electromagnetic deviation correction system for a pole piece and a pole piece deviation correction method thereof. Background Art

[0002] During the processing of a pole piece, it is necessary to drive the pole piece for transmission. During the transmission of the pole piece, it is necessary to correct the running direction and position of the pole piece in real time to avoid the processing of the pole piece.

[0003] In the related art, a deviation correction mechanism is usually used to correct the running direction and position of the pole piece. The traditional deviation correction mechanism changes the position or angle of the guide roller through mechanical transmission, so that the pole piece returns to the correct position. In this process, the deviation correction mechanism needs to contact the surface of the pole piece, resulting in the situation that the deviation correction mechanism is likely to damage the slurry coating on the surface of the pole piece. Summary of the Invention

[0004] To solve or partially solve the problems existing in the related art, the present application provides a non-contact electromagnetic deviation correction system for a pole piece and a pole piece deviation correction method thereof, which can correct the pole piece without contacting the pole piece.

[0005] On the one hand, the present application provides a non-contact electromagnetic deviation correction system for a pole piece, which includes an electromagnetic deviation correction module, a detection module, a controller and an actuator; the electromagnetic deviation correction module includes two deviation correction devices arranged at intervals along the width direction of the pole piece, and each deviation correction device includes a deviation correction channel for passing through the pole piece and at least two deviation correction mechanisms. In the same deviation correction device, the deviation correction channel is located between the two deviation correction mechanisms; the deviation correction mechanism is used to form a traveling magnetic field in the deviation correction channel, so that the pole piece passing through the deviation correction channel is subjected to a magnetic force away from the other deviation correction channel; the detection module is used to detect the relative angle between the pole piece and the deviation correction device in the deviation correction channel and the lateral offset of the pole piece in the width direction; the controller is communicatively connected with the detection module, and the controller generates a control quantity according to the relative angle between the pole piece and the deviation correction device in the deviation correction channel and the lateral offset of the pole piece in the width direction; the actuator is communicatively connected with the controller, the actuator is used to receive the control quantity, and the actuator adjusts the intensity of the traveling magnetic field generated by the deviation correction mechanism according to the control quantity.

[0006] Further, the detection module is further configured to detect the tape running speed and the tape running tension of the pole piece. The controller compares the relative angle between the pole piece and the deviation rectifying device, the lateral offset of the pole piece in the width direction, the tape running speed of the pole piece, and the tape running tension of the pole piece with preset target values respectively, so as to calculate the deviations in each dimension. The controller generates a control quantity based on the deviations in each dimension, and the controller transmits the control quantity to the actuator. The actuator adjusts the intensity of the traveling wave magnetic field according to the control quantity so that each dimension of the pole piece reaches the target value.

[0007] Further, in the same deviation rectifying device, one of the deviation rectifying mechanisms is located above the other deviation rectifying mechanism, and the two deviation rectifying mechanisms are mirror-symmetrical about the deviation rectifying channel.

[0008] Further, the actuator further includes a power supply control module, and the power supply control module is configured to input three-phase alternating current to the deviation rectifying mechanism. The power supply control module adjusts the intensity of the traveling wave magnetic field received by the pole piece in the deviation rectifying channel by adjusting the frequency and voltage of the three-phase alternating current.

[0009] Further, the actuator further includes an angle control module, and the angle control module drives the deviation rectifying device to rotate to adjust the relative angle between the traveling wave magnetic field and the pole piece in the deviation rectifying channel.

[0010] Further, the controller generates a control quantity according to the relative angle between the pole piece and the deviation rectifying device and sends the control quantity to the angle control module. The angle control module adjusts the angle between the direction of the traveling wave magnetic field and the tape running direction of the pole piece so that the component velocity of the traveling wave magnetic field in the tape running direction of the pole piece is equal to the tape running speed of the pole piece.

[0011] Further, the deviation rectifying device includes an upper leveling device and a lower leveling device. The upper leveling device is connected to the upper deviation rectifying mechanism, and the upper leveling device is configured to adjust the levelness of the upper deviation rectifying mechanism. The lower leveling device is connected to the lower deviation rectifying mechanism, and the lower leveling device is configured to adjust the levelness of the lower deviation rectifying mechanism.

[0012] Further, the detection module is further configured to detect the wrinkle degree of the pole piece. The controller generates a control quantity according to the detected wrinkle degree of the pole piece, and the actuator adjusts the intensity of the traveling wave magnetic field generated by the deviation rectifying mechanism according to the control quantity so that the pole piece is flattened.

[0013] On the other hand, the present application provides a method for rectifying the deviation of a pole piece, which uses the non-contact electromagnetic deviation rectifying system for a pole piece, and includes the following steps: Pass the pole piece through the deviation rectification channel, with one end in the width direction of the pole piece entering one of the deviation rectification devices and the other end in the width direction of the pole piece entering the other deviation rectification device; Detect the relative angle between the pole piece and the deviation rectification device in the deviation rectification channel and the lateral offset in the width direction; Calculate the deviation from the target value based on the detected relative angle and lateral offset; Adjust the intensity of the traveling magnetic field in the deviation rectification channels of each deviation rectification device respectively, so that the relative angle between the pole piece and the deviation rectification device and the lateral offset of the pole piece in the width direction reach the target value.

[0014] Further, during the process of adjusting the intensity of each traveling magnetic field respectively, the detection module detects the relative angle between the pole piece and the deviation rectification device and the lateral offset of the pole piece in the width direction in real time and feeds it back to the controller, and the controller adjusts the control quantity in real time according to the detected data.

[0015] The technical solution provided by this application may include the following beneficial effects: By generating a traveling magnetic field in the deviation rectification channel through the deviation rectification mechanism, when the pole piece passes through the deviation rectification channel, eddy currents are induced in the current collector of the pole piece. By controlling the magnitude of the traveling magnetic field through the controller, the pole piece is subjected to an electromagnetic force and moves to the required target position, thereby correcting the driving position of the pole piece. The whole process does not contact the surface of the pole piece and does not damage the slurry coating on the surface of the pole piece, and is applicable to the high-precision and fast-response deviation rectification of wet pole pieces, semi-dry pole pieces, and dry pole pieces.

[0016] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit this application. Brief Description of the Drawings

[0017] By describing the exemplary embodiments of this application in more detail in conjunction with the drawings, the above and other objects, features, and advantages of this application will become more obvious. Among them, in the exemplary embodiments of this application, the same reference numerals generally represent the same components.

[0018] Figure 1 is a schematic structural diagram of the electromagnetic deviation rectification module shown in the embodiments of this application; Figure 2 is a schematic structural diagram of the deviation rectification mechanism shown in the embodiments of this application; Figure 3 is a schematic structural diagram of the iron core shown in the embodiments of this application; Figure 4 is a schematic structural diagram of the deviation rectification device shown in the embodiments of this application; Figure 5 is a schematic diagram of the angle adjustment of the deviation rectification mechanism shown in the embodiments of this application; Figure 6It is a flowchart of the pole piece deviation correction method shown in the embodiments of the present application.

[0019] Reference numerals: deviation correction mechanism 1; coil 11; iron core 12; main body 121; cooling tank 122; iron teeth 123; deviation correction channel 2; upper electromagnetic shielding case 3; lower electromagnetic shielding case 4; heat dissipation device 5; upper leveling device 6; lower leveling device 7; lifting device 8; bracket 9; pole piece 10. Detailed implementation manners

[0020] The embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, 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.

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

[0022] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0023] Unless otherwise clearly defined and limited, the terms "mounted", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0024] In the related art, a deviation rectifying mechanism is usually used to correct the running direction and position of the pole piece. The traditional deviation rectifying mechanism changes the position or angle of the guiding roller through mechanical transmission, so that the pole piece returns to the correct position. In this process, the deviation rectifying mechanism needs to contact the surface of the pole piece, which easily causes the situation that the slurry coating on the surface of the pole piece is damaged by the deviation rectifying mechanism.

[0025] In view of the above problems, an embodiment of the present application provides a non-contact electromagnetic deviation rectifying system for a pole piece and a pole piece deviation rectifying method, which can rectify the pole piece without contacting the pole piece.

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

[0027] See Figure 1 , the non-contact electromagnetic deviation rectifying system for a pole piece includes an electromagnetic deviation rectifying module, a detection module and a controller. The electromagnetic deviation rectifying module generates an electromagnetic force on the pole piece 10 to adjust the position and running direction of the pole piece 10, and the controller adjusts the magnitude of the electromagnetic force according to the data detected by the detection module.

[0028] See Figure 1-3 , the electromagnetic deviation rectifying module includes two deviation rectifying devices, and the two deviation rectifying devices are arranged at intervals along the width direction of the pole piece 10. The deviation rectifying device includes at least two deviation rectifying mechanisms 1 and a deviation rectifying channel 2 for passing through the pole piece 10. In the same deviation rectifying device, a deviation rectifying channel 2 is formed between at least two deviation rectifying mechanisms 1, and the deviation rectifying channel 2 is located between two of the deviation rectifying mechanisms 1. Each of the two deviation rectifying devices has a deviation rectifying channel 2, so that when the pole piece 10 is driven, both ends in the width direction of the pole piece 10 can be affected by the deviation rectifying device. In some embodiments, the deviation rectifying device includes two deviation rectifying mechanisms 1, and the two deviation rectifying mechanisms 1 are mirror-symmetrical about the deviation rectifying channel 2; in some embodiments, the deviation rectifying device includes a plurality of deviation rectifying mechanisms 1, and more than two deviation rectifying mechanisms 1 are located above the pole piece 10, and all the deviation rectifying mechanisms 1 located above the pole piece 10 are arranged side by side, and more than two deviation rectifying mechanisms 1 are located below the pole piece 10, and all the deviation rectifying mechanisms 1 located below the pole piece 10 are arranged side by side, and the deviation rectifying mechanisms 1 located above are symmetrically arranged in pairs with the deviation rectifying mechanisms 1 located below about the deviation rectifying channel 2.

[0029] See Figure 1-3, the deviation rectifying mechanism 1 is used to form a traveling wave magnetic field in the deviation rectifying channel 2, so that the pole piece 10 passing through the deviation rectifying channel 2 is subjected to a magnetic force away from the other deviation rectifying channel 2. Specifically, when the traveling wave magnetic field is formed in the deviation rectifying channel 2, if the pole piece 10 passes through the deviation rectifying channel 2, the traveling wave magnetic field will induce eddy currents in the current collector of the pole piece 10. The eddy currents interact with the traveling wave magnetic field to generate an electromagnetic force, and the direction of the electromagnetic force is the direction in which the deviation rectifying channel 2 where the pole piece 10 is located is away from the other deviation rectifying channel 2. Since both ends of the pole piece 10 in the width direction enter a deviation rectifying channel 2 respectively, by adjusting the magnitudes of the traveling wave magnetic field intensities generated by the two deviation rectifying devices respectively, the magnitudes of the electromagnetic forces received at both ends of the pole piece 10 in the width direction can be made different, so that the pole piece 10 moves towards the side with the larger electromagnetic force received.

[0030] See Figure 1-3 , the detection module is used to detect the relative angle between the pole piece 10 and the deviation rectifying device in the deviation rectifying channel 2 and the lateral offset of the pole piece 10 in the width direction. Specifically, the detection module includes an angle sensor and a laser displacement sensor. The angle sensor is used to detect the relative angle between the pole piece 10 and the deviation rectifying device in the deviation rectifying channel 2, and the laser displacement sensor is used to detect the lateral offset of the pole piece 10 in the width direction. The lateral offset of the pole piece 10 in the width direction is the offset distance in the width direction between the position where the pole piece 10 is normally transmitted in the deviation rectifying channel 2 and the actual position of the pole piece 10 during transmission in the deviation rectifying channel 2. The controller is communicatively connected to the detection module, and the controller generates a control quantity according to the relative angle between the pole piece 10 and the deviation rectifying device in the deviation rectifying channel 2 and the lateral offset in the width direction. The actuator is communicatively connected to the controller. The actuator can receive the control quantity sent by the controller, and the actuator adjusts the magnitudes of the traveling wave magnetic fields generated by the two deviation rectifying devices respectively according to the control quantity, so that the pole piece 10 moves to the required target position. In this application, the deviation rectifying mechanism 1 generates a traveling wave magnetic field in the deviation rectifying channel 2. When the pole piece 10 passes through the deviation rectifying channel 2, eddy currents are induced in the current collector of the pole piece 10. By controlling the magnitude of the traveling wave magnetic field by the controller, the pole piece 10 is subjected to an electromagnetic force and moves to the required target position, thereby correcting the transmission position of the pole piece 10. The whole process does not contact the surface of the pole piece 10 and does not damage the slurry coating on the surface of the pole piece 10, and is applicable to high-precision and fast-response deviation rectification of wet pole pieces 10, semi-dry pole pieces 10, and dry pole pieces 10.

[0031] See Figure 1-3, the detection module can also detect the tape running speed and tape running tension of the pole piece 10. Specifically, the detection module further includes a speed sensor and a tension sensor. The speed sensor is used to detect the tape running speed of the pole piece 10, and the tension sensor is used to detect the tape running tension of the pole piece 10. The detection module can send data such as the detected tape running speed and tape running tension of the pole piece 10 to the controller. The detection module sends dimensions such as the detected tape running speed of the pole piece 10, the tape running tension of the pole piece 10, the relative angle between the pole piece 10 and the deviation correction device, and the lateral offset in the width direction to the controller. The controller respectively compares the relative angle between the pole piece 10 and the deviation correction device, the lateral offset of the pole piece 10 in the width direction, the tape running speed of the pole piece 10, and the tape running tension of the pole piece 10 with the preset target values, so as to calculate the deviation of the pole piece 10 in each dimension; the controller generates a control quantity based on the deviations in each dimension, and then the controller transmits the control quantity to the actuator; the actuator adjusts the intensity of the traveling wave magnetic field generated by the deviation correction mechanism 1 according to the control quantity, so that each dimension of the pole piece 10 reaches the target value, and the pole piece 10 completes the deviation correction action. During the entire deviation correction process, the sensor continuously monitors the state of the pole piece 10 and feeds the latest data back to the controller. Preferably, the controller is an RBF-PID control system. After calculating the deviations of the pole piece 10 in each dimension, the controller can generate a control quantity based on the operation rules of the proportional, integral, and differential links, and then the controller transmits the control quantity to the actuator. The controller makes corresponding adjustments to the control quantity according to these real-time feedbacks, so that the actuator adjusts the deviation correction mechanism 1 to continuously optimize the deviation correction action, ensuring that the pole piece 10 always maintains the correct position and posture during the transmission process, and realizing high-precision and stable deviation correction control. In some embodiments, since the traveling wave magnetic field will generate electromagnetic damping on the transmission of the pole piece 10, and the electromagnetic damping will generate resistance to the movement of the pole piece 10, the controller can adjust the intensity of the traveling wave magnetic field according to the tape running speed of the pole piece 10, thereby adjusting the transmission speed of the pole piece 10, so that the speed of the pole piece 10 meets the preset target value. In addition, the controller can also adjust the tape running tension of the pole piece 10 by adjusting the tape running speed of the pole piece 10.

[0032] In some embodiments, in the same deviation correction device, one deviation correction mechanism 1 is located above the other deviation correction mechanism 1, and the two deviation correction mechanisms 1 are mirror-symmetrical about the deviation correction channel 2. When the pole piece 10 passes through the deviation correction channel 2, the deviation correction mechanism 1 located above the pole piece 10 can act on the pole piece 10, and the deviation correction mechanism 1 located below the pole piece 10 can also act on the pole piece 10, so that the electromagnetic force received by the pole piece 10 is more uniform.

[0033] In some embodiments, the deviation rectifying mechanism 1 includes a power control structure and a plurality of electromagnet groups arranged side by side in the width direction of the pole piece 10. The power control structure controls the alternating current to be alternately applied to the plurality of electromagnet groups in sequence along the arrangement direction of the plurality of electromagnet groups. The alternating magnetic field generated by the alternating current moves in the magnetic field moving area according to the excitation power-on sequence of the plurality of electromagnet groups. When the pole piece 10 passes through the deviation rectifying channel 2, the pole piece 10 is subjected to a magnetic force away from the other deviation rectifying channel 2. By respectively adjusting the magnitude of the alternating current applied to the two deviation rectifying devices, the pole piece 10 can be moved to one side in the width direction. See Figure 1-2 , in some embodiments, the actuating mechanism includes a power control module, and the power control module can receive the control quantity sent by the controller; the deviation rectifying mechanism 1 includes an iron core 12 and a plurality of coils 11, and the plurality of coils 11 are wound around the iron core 12 according to a three-phase winding structure; the power control module applies three-phase alternating current to the plurality of coils 11, wherein the directions of the currents applied by the power control module to the two deviation rectifying devices are opposite, and the directions of the three-phase currents applied to all the deviation rectifying mechanisms 1 in the same deviation rectifying device are the same; when the coils 11 are applied with three-phase alternating current, a traveling wave magnetic field will be generated in the deviation rectifying channel 2, and the power control module can adjust the magnitude of the traveling wave magnetic field intensity received by the pole piece 10 in the deviation rectifying channel 2 by adjusting the frequency and voltage of the three-phase alternating current input to the coils 11, so as to conveniently adjust the magnitude and direction of the electromagnetic force to adapt to the traveling deviation rectification of lithium battery pole pieces 10 with different thicknesses and widths or metal foils of different materials. It can also input a preset V / f curve according to the current collector material and thickness of the pole piece 10 to adjust the voltage and frequency matching to avoid too strong or too weak electromagnetic force; for different deviation rectifying devices, the three-phase alternating current applied to the deviation rectifying devices is independent of each other. Preferably, each deviation rectifying mechanism 1 is applied with at least one independent three-phase alternating current; since the power control module applies three-phase alternating current to the plurality of coils 11, the three-phase alternating current in the coils 11 satisfies the three-phase sinusoidal alternating current curve distribution, and the traveling wave magnetic field generated in the deviation rectifying channel 2 is a sinusoidal wave magnetic field. Compared with the square wave magnetic field, the sinusoidal wave magnetic field is more stable, and the magnetic field change curve is smoother. The change of the electromagnetic force received by the pole piece 10 is also smoother, the speed change of the pole piece 10 in the width direction is also smoother, and the deviation rectifying effect on the pole piece 10 is more accurate.

[0034] See Figure 1-3, the iron core 12 includes a main body 121 and a plurality of iron teeth 123. The main body 121 is strip-shaped, and the iron teeth 123 are connected to the main body 121. The plurality of iron teeth 123 are spaced apart along the length direction of the main body 121. The plurality of coils 11 are wound around the iron teeth 123 according to a three-phase winding structure. A slot is formed between two adjacent iron teeth 123, and the coil 11 passes through the slot. The iron core 12 is stacked by thin silicon steel sheets with low iron loss, and an insulating material is coated between the silicon steel sheets. Compared with a solid iron core 12, the stacked silicon steel sheets can limit the eddy current to flow in a single sheet, reducing the eddy current loss in the iron core 12, thereby reducing the power consumption of the iron core 12. In some embodiments, the deviation correction mechanism 1 includes at least two iron cores 12 and a magnetic conduction member. The at least two iron cores 12 are arranged side by side along the length direction of the main body 121, and two adjacent iron cores 12 are connected by the magnetic conduction member. The power supply control module includes a plurality of three-phase power supplies, and the three-phase power supplies correspond to the iron cores 12 one by one. The coils 11 on each iron core 12 are powered by one three-phase power supply; an iron core 12 of a certain length can be used as an electromagnetic module alone. In actual production, modular assembly can be carried out according to the width of the deviation correction mechanism 1. The appropriate number of iron cores 12 is selected and arranged side by side according to the width of the deviation correction mechanism 1. Two iron cores 12 are connected by a magnetic conduction member. The magnetic conduction member is made of a magnetic conduction material with a magnetic permeability close to that of the silicon steel sheet, so that the magnetic flux lines between different iron cores 12 are overly smooth. At the same time, multiple three-phase power supplies can be used to independently supply power to the coils 11 on different iron cores 12, solving the high-load problem of using a single power supply for all coils 11 and ensuring the stable output of the electromagnetic deviation correction performance. The plurality of coils 11 are wound around the iron core 12 according to the structure of a single-wire double-layer short-pitch winding, a single-wire single-layer short-pitch winding, a single-wire double-layer full-pitch winding, a double-wire single-layer full-pitch winding, a double-wire double-layer full-pitch winding, or a double-wire double-layer short-pitch winding. The iron core 12 can be matched with different winding settings according to different deviation correction requirements, taking into account both the winding energy consumption and the deviation correction effect.

[0035] See Figure 1-3, the deviation rectifying device includes a heat dissipation device 5, which is connected to the side of the iron core 12 facing away from the deviation rectifying channel 2, and the heat dissipation device 5 conducts heat with the iron core 12. In some embodiments, the main body 121 is provided with a plurality of cooling grooves 122, and the cooling grooves 122 are located on the side of the main body 121 facing away from the iron teeth 123; the heat dissipation device 5 includes a cooling pipe, the cooling pipe passes through the cooling grooves 122 and contacts the main body 121, the cooling pipe can conduct heat with the main body 121, and a circulating coolant is introduced into the cooling pipe; the cooling pipe can be externally connected to a liquid cooling device, so as to utilize the cooling pipe to absorb the heat generated by the main body 121 and the coil 11, and avoid the heat generated during long-term operation from affecting the normal operation of the deviation rectifying mechanism 1; preferably, the iron teeth 123 are located on the side of the main body 121 facing the deviation rectifying channel 2 to avoid the cooling pipe from affecting the intensity of the traveling wave magnetic field; preferably, the cooling mechanism further includes a temperature sensor, the temperature sensor is installed on the iron core 12, the temperature sensor is used to detect the temperature of the iron core 12 and send the data to the heat dissipation device 5, and the heat dissipation device 5 dynamically adjusts the flow rate of the coolant in the cooling pipe, so as to keep the temperature of the iron core 12 constant and ensure the normal operation of the deviation rectifying mechanism 1. In some embodiments, the heat dissipation device 5 can be a fan, and the heat dissipation device 5 uses air cooling to cool the iron core 12.

[0036] See Figure 1-5 , the actuating mechanism further includes an angle control module, and the angle control module drives the deviation rectifying device to rotate to adjust the relative angle between the traveling wave magnetic field and the pole piece 10 in the deviation rectifying channel 2. Specifically, the angle control module drives one end of the main body 121 away from the midline of the pole piece 10 to incline in the tape running direction of the pole piece 10, so that the direction of the traveling wave magnetic field generated by the deviation rectifying mechanism 1 forms an acute angle with the tape running direction of the pole piece 10, and the component velocity direction of the traveling wave magnetic field generated by the deviation rectifying mechanism 1 is the same as the tape running velocity direction of the pole piece 10, thereby reducing the resistance of the traveling wave magnetic field to the tape running of the pole piece 10; preferably, the controller sends an instruction to the angle control module according to the data detected by the angle sensor, and the angle control module dynamically adjusts the relative angle between the midline of the pole piece 10 and the extending direction of the main body 121, so that the component velocity of the traveling wave magnetic field in the tape running direction of the pole piece 10 is equal to the tape running velocity of the pole piece 10, so as to eliminate the obstructive effect of the traveling wave magnetic field on the tape running of the pole piece 10, and thus only form an electromagnetic force along the width direction of the pole piece 10. Specifically, let the tape running velocity of the pole piece 10 be v_tape, the velocity of the traveling wave magnetic field be v_mag, and the angle control module can adjust the included angle θ between the main body 121 and the midline of the pole piece 10 in real time. When v_tape = v_mag·cos θ is satisfied, from the perspective of electromagnetic induction, the tape running direction of the motor will not generate a change in magnetic flux due to the traveling wave magnetic field. According to Faraday's law of electromagnetic induction, a change in magnetic flux will generate factors such as induced electromotive force that impede motion, thus avoiding the obstruction of the traveling wave magnetic field to the tape running motion of the pole piece 10 and ensuring the stable transmission of the pole piece 10.

[0037] See Figure 1-4, the deviation rectifying device includes an upper leveling device 6, a lower leveling device 7, a lifting device 8 and a bracket 9. The upper leveling device 6 is connected to the upper deviation rectifying mechanism 1, and the upper leveling device 6 is used to adjust the levelness of the upper deviation rectifying mechanism 1. The lower leveling device 7 is connected to the lower deviation rectifying mechanism 1, and the lower leveling device 7 is used to adjust the levelness of the lower deviation rectifying mechanism 1. Specifically, the lower leveling device 7 is a leveling foot, the lower leveling device 7 is connected to the bottom end of the bracket 9, and the lower deviation rectifying mechanism 1 is installed on the bracket 9. The lifting device 8 is connected to the bracket 9 and the upper leveling device 6 respectively. The lifting device 8 is a coarse adjustment bolt, and the lifting device 8 can adjust the height difference between the upper and lower deviation rectifying mechanisms 1. The upper leveling device 6 is a fine adjustment bolt. Before the deviation rectifying device works, first, the lower deviation rectifying mechanism 1 is leveled with the lower surface of the pole piece 10 through the foot leveling, then the height difference between the upper and lower deviation rectifying mechanisms 1 is controlled by the coarse adjustment bolt, and finally, the fine adjustment bolt is adjusted so that the upper deviation rectifying mechanism 1 is parallel to the upper surface of the pole piece 10.

[0038] See Figure 1-2 , in the upper and lower deviation rectifying mechanisms 1 of the same deviation rectifying device, the extending direction of the main body 121 of the upper deviation rectifying mechanism 1 is parallel to the extending direction of the main body 121 of the lower deviation rectifying mechanism 1. When the pole piece 10 passes through the deviation rectifying channel 2, the upper surface of the pole piece 10 in the deviation rectifying channel 2 is parallel to the extending direction of the main body 121, ensuring that the pole piece 10 can be more evenly affected by the traveling magnetic field.

[0039] In some embodiments, the detection module can also detect the wrinkling degree of the pole piece 10. The controller generates a control quantity according to the detected wrinkling degree of the pole piece 10, and the actuator adjusts the intensity of the traveling magnetic field generated by the deviation rectifying mechanism 1 according to the control quantity to flatten the pole piece 10. Specifically, the detection module further includes a CCD camera. The CCD camera can photograph the pole piece 10 to obtain the surface topography and image texture data of the pole piece 10. The controller comprehensively calculates the wrinkle confidence of the pole piece 10 by using a weighted voting and / or deep learning algorithm based on the surface topography and image texture data of the pole piece 10 detected by the detection module; when the wrinkle confidence of the pole piece 10 exceeds the threshold, the controller sends an instruction to the power control module, and the power control module dynamically adjusts the intensity of the traveling magnetic field in the deviation rectifying channel 2, thereby changing the electromagnetic force received by the pole piece 10 and making the pole piece 10 produce a flattening effect until the wrinkle confidence of the pole piece 10 is lower than the threshold.

[0040] See Figure 1-4, the deviation rectifying device further includes an upper electromagnetic shielding case 3 and a lower electromagnetic shielding case 4. In the same deviation rectifying device, the upper electromagnetic shielding case 3 is installed on the side of the upper deviation rectifying mechanism 1 facing away from the deviation rectifying channel 2, and the lower electromagnetic shielding case 4 is installed on the side of the lower deviation rectifying mechanism 1 facing away from the deviation rectifying channel 2. The upper electromagnetic shielding case 3 and the lower electromagnetic shielding case 4 are prepared from materials with high electrical conductivity and high magnetic permeability. Specifically, both the upper electromagnetic shielding case 3 and the lower electromagnetic shielding case 4 are sleeved outside the main body 121. The upper electromagnetic shielding case 3 covers opposite ends in the length direction of the iron core 12, and the upper electromagnetic shielding case 3 also covers the area outside the side where the coil 11 is wound around the iron teeth 123 on the iron core 12; the lower electromagnetic shielding case 4 covers opposite ends in the length direction of the iron core 12, and the lower electromagnetic shielding case 4 also covers the area outside the side where the coil 11 is wound around the iron teeth 123 on the iron core 12; the upper electromagnetic shielding case 3 and the lower electromagnetic shielding case 4 can effectively isolate the magnetic field diffusion at opposite ends in the length direction of the iron core 12 and on the side of the iron core 12 away from the deviation rectifying channel 2, solve the edge effect in the deviation rectifying device, and improve the stability of the electromagnetic force.

[0041] See Figure 2 and Figure 6 , on the other hand, the present application provides a method for rectifying the deviation of a pole piece. The method for rectifying the deviation of a pole piece uses a non-contact electromagnetic deviation rectifying system for the pole piece, and the method for rectifying the deviation of a pole piece includes the following steps: S01. Make the pole piece 10 pass through the deviation rectifying channel 2, and make one end in the width direction of the pole piece 10 enter one of the deviation rectifying devices, and the other end in the width direction of the pole piece 10 enter the other deviation rectifying device.

[0042] Specifically, it is necessary to first arrange the two deviation rectifying devices facing each other and make the deviation rectifying channels 2 in the two deviation rectifying devices at the same height; then adjust the levelness of each deviation rectifying mechanism 1 so that the extending direction of the main body 121 is horizontal; adjust the distance between the two deviation rectifying devices to ensure that when the pole piece 10 passes through the deviation rectifying channel 2, both ends in the width direction of the pole piece 10 can be within the deviation rectifying channel 2; initialize the non-contact electromagnetic deviation rectifying system for the pole piece and input the target position of the pole piece 10; make the pole piece 10 whose tape running is offset due to external interference pass through the deviation rectifying channel 2, and make one end in the width direction of the pole piece 10 enter one of the deviation rectifying devices, and the other end in the width direction of the pole piece 10 enter the other deviation rectifying device, where one end in the width direction of the pole piece 10 does not exceed the side of one deviation rectifying mechanism 1 away from the midline in the length direction of the pole piece, and the other end in the width direction of the pole piece 10 does not exceed the side of the other deviation rectifying mechanism 1 away from the midline in the length direction of the pole piece; keep a certain tension in the tape running direction of the pole piece 10 to ensure that when the pole piece 10 passes through the deviation rectifying channel 2, the tape running direction of the part of the pole piece 10 located in the deviation rectifying channel 2 is horizontal; use the driving mechanism to pull the pole piece 10.

[0043] S02. Detect the relative angle between the pole piece 10 and the deviation correction device in the deviation correction channel 2 and the lateral offset in the width direction.

[0044] The detection module includes an angle sensor, a laser displacement sensor, a speed sensor, and a tension sensor. The relative angle between the pole piece 10 and the deviation correction device in the deviation correction channel 2 is detected by the angle sensor, the lateral offset of the pole piece 10 in the width direction is detected by the laser displacement sensor, the running speed of the pole piece 10 is detected by the speed sensor, and the running tension of the pole piece 10 is detected by the tension sensor.

[0045] S03. Calculate the deviation from the target value based on the detected relative angle and lateral offset.

[0046] Specifically, the detection module sends the detected data to the controller. The controller compares the relative angle between the pole piece 10 and the deviation correction device, the lateral offset of the pole piece 10 in the width direction, the running speed of the pole piece 10, and the running tension of the pole piece 10 with the preset target values respectively, so as to calculate the deviation of the pole piece 10 in each dimension.

[0047] S04. Adjust the intensity of the traveling magnetic field in the deviation correction channel 2 of each deviation correction device respectively, so that the relative angle between the pole piece 10 and the deviation correction device and the lateral offset of the pole piece 10 in the width direction reach the target values.

[0048] The controller generates a control quantity based on the deviation of the pole piece 10 in each dimension and transmits it to the corresponding power control module. The power control module adjusts the voltage and power of the two deviation correction devices in real time respectively. The deviation correction device then adjusts the intensity of the traveling magnetic field accordingly. The width direction of the pole piece 10 is divided into the left direction and the right direction. When the pole piece 10 deviates to the right, the power control module strengthens the power and voltage output of the left deviation correction device and weakens the power and voltage output of the right deviation correction device, so that the pole piece 10 moves to the left. When the pole piece 10 deviates to the left, the electromagnetic control module strengthens the power and voltage output of the right deviation correction device and weakens the power and voltage output of the left deviation correction device, so that the pole piece 10 moves to the right. The angle sensor detects the relative angle between the pole piece 10 and the left deviation correction device in the deviation correction channel 2, and the angle sensor detects the relative angle between the pole piece 10 and the right deviation correction device in the deviation correction channel 2. The controller sends instructions to the power control module according to the detected data. The electromagnetic control module adjusts the output voltage and power, and corrects the position of the pole piece 10 through the deviation correction device. The controller records the data of the whole process and trains the neural network to improve the efficiency of correcting the pole piece 10 next time. Preferably, the controller is an RBF-PID control system. After calculating the deviation of the pole piece 10 in each dimension, the controller can generate a control quantity based on the operation rules of the proportional, integral, and differential links, and then the controller transmits the control quantity to the actuator.

[0049] In some embodiments, during the process of adjusting the intensity of each traveling magnetic field respectively, the detection module detects in real time the relative angle between the pole piece and the deviation rectifying device, the lateral offset of the pole piece 10 in the width direction, the tape running speed of the pole piece, and the tape running tension of the pole piece, and feeds them back to the controller. The controller adjusts the control quantity in real time according to the detected data, and the actuator also adjusts in real time the intensity of the traveling magnetic field generated by the deviation rectifying mechanism 1 accordingly, ensuring that each dimension of the pole piece 10 can accurately reach the target value.

[0050] See Figure 5 , in some embodiments, in step S03, when adjusting the intensity of the traveling magnetic field in the deviation rectifying channel 2, the direction of the traveling magnetic field forms an acute angle with the tape running direction of the pole piece 10. By adjusting the intensity of the traveling magnetic field and / or the angle between the direction of the traveling magnetic field and the tape running direction of the pole piece 10, the component velocity of the traveling magnetic field in the tape running direction of the pole piece 10 is made equal to the tape running speed of the pole piece 10.

[0051] See Figure 2 and Figure 5 , specifically, the angle control module drives the deviation rectifying mechanism 1 to rotate, making one end of the main body 121 away from the midline of the pole piece 10 tilt in the tape running direction of the pole piece 10, so that the direction of the traveling magnetic field generated by the deviation rectifying mechanism 1 forms an acute angle with the tape running direction of the pole piece 10. The angle sensor is used to detect the angle between the midline of the pole piece 10 and the extending direction of the main body 121. The angle control module dynamically adjusts the relative angle between the midline of the pole piece 10 and the extending direction of the main body 121 according to the data detected by the angle sensor, so that the component velocity of the traveling magnetic field in the tape running direction of the pole piece 10 is equal to the tape running speed of the pole piece 10, in order to eliminate the obstructive effect of the traveling magnetic field on the tape running of the pole piece 10, thereby only forming an electromagnetic force along the width direction of the pole piece 10.

[0052] It can be seen from this pole piece deviation rectifying method that in this application, the deviation rectifying mechanism 1 generates a traveling magnetic field in the deviation rectifying channel 2. When the pole piece 10 passes through the deviation rectifying channel 2, eddy currents are induced in the current collector of the pole piece 10. By controlling the magnitude of the traveling magnetic field by the controller, the pole piece 10 is subjected to an electromagnetic force and moves to the required target position, thereby correcting the driving position of the pole piece 10. The whole process does not contact the surface of the pole piece 10 and does not damage the slurry coating on the surface of the pole piece 10, and is applicable to high-precision and fast-response deviation rectification of wet pole pieces 10, semi-dry pole pieces 10, and dry pole pieces 10.

[0053] The solution of the present application has been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of the various embodiments have their own emphases. For the parts not described in detail in a certain embodiment, reference may be made to the relevant descriptions of other embodiments. Those skilled in the art should also be aware that the actions and modules involved in the specification are not necessarily essential to the present application. In addition, it can be understood that the steps in the method embodiments of the present application can be adjusted, combined, and deleted according to actual needs, and the modules in the device embodiments of the present application can be combined, divided, and deleted according to actual needs.

[0054] The various embodiments of the present application have been described above. The above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles of the embodiments, the practical application, or the improvement of the technology in the market, or to enable other ordinary skill in the art in the technical field to understand the embodiments disclosed herein.

Claims

1. A non-contact electromagnetic correction system for a pole piece, characterized in that Including: An electromagnetic deviation correction module, the electromagnetic deviation correction module includes two deviation correction devices arranged at intervals in the width direction of the pole piece, the deviation correction device includes a deviation correction channel for passing the pole piece and at least two deviation correction mechanisms. In the same deviation correction device, the deviation correction channel is located between the two deviation correction mechanisms; the deviation correction mechanism is used to form a traveling magnetic field in the deviation correction channel, so that the pole piece passing through the deviation correction channel is subjected to a magnetic force away from the other deviation correction channel; A detection module, the detection module is used to detect the relative angle between the pole piece and the deviation correction device in the deviation correction channel and the lateral offset of the pole piece in the width direction; A controller, the controller is communicatively connected with the detection module, and the controller generates a control quantity according to the relative angle between the pole piece and the deviation correction device in the deviation correction channel and the lateral offset of the pole piece in the width direction; An actuator, the actuator is communicatively connected with the controller, the actuator is used to receive the control quantity, and the actuator adjusts the intensity of the traveling magnetic field generated by the deviation correction mechanism according to the control quantity.

2. The non-contact electromagnetic deviation rectification system for the pole piece according to claim 1, wherein: The detection module is also used to detect the tape running speed of the pole piece and the tape running tension of the pole piece. The controller respectively compares the relative angle between the pole piece and the deviation correction device, the lateral offset of the pole piece in the width direction, the tape running speed of the pole piece, and the tape running tension of the pole piece with preset target values, so as to calculate the deviation in each dimension; the controller generates a control quantity based on the deviation in each dimension, the controller transmits the control quantity to the actuator, and the actuator adjusts the intensity of the traveling magnetic field according to the control quantity, so that each dimension of the pole piece reaches the target value.

3. The non-contact electromagnetic deviation rectification system for the pole piece according to claim 1, wherein: In the same deviation correction device, one of the deviation correction mechanisms is located above the other deviation correction mechanism, and the two deviation correction mechanisms are mirror-symmetrical about the deviation correction channel.

4. The non-contact electromagnetic deviation rectification system for the pole piece according to claim 1, wherein: The actuator includes a power supply control module, and the power supply control module is used to input three-phase alternating current to the deviation correction mechanism. The power supply control module adjusts the intensity of the traveling magnetic field received by the pole piece in the deviation correction channel by adjusting the frequency and voltage of the three-phase alternating current.

5. The non-contact electromagnetic deviation rectification system for the pole piece according to claim 1, characterized in that: The actuator further includes an angle control module, and the angle control module drives the deviation correction mechanism to rotate to adjust the relative angle between the traveling magnetic field and the pole piece in the deviation correction channel.

6. The non-contact electromagnetic deviation rectification system for the pole piece according to claim 5, characterized in that: The controller generates a control quantity according to the relative angle between the pole piece and the deviation correction device and sends the control quantity to the angle control module. The angle control module adjusts the angle between the direction of the traveling magnetic field and the tape running direction of the pole piece, so that the component velocity of the traveling magnetic field in the tape running direction of the pole piece is equal to the tape running speed of the pole piece.

7. The non-contact electromagnetic deviation correction system for the pole piece according to claim 1, characterized in that: The deviation correction device includes an upper leveling device and a lower leveling device. The upper leveling device is connected to the upper deviation correction mechanism, and the upper leveling device is used to adjust the levelness of the upper deviation correction mechanism. The lower leveling device is connected to the lower deviation correction mechanism, and the lower leveling device is used to adjust the levelness of the lower deviation correction mechanism.

8. The non-contact electromagnetic deviation rectification system for the pole piece according to claim 1, wherein: The detection module is further configured to detect the degree of wrinkle of the electrode sheet, the controller generates a control quantity according to the detected degree of wrinkle of the electrode sheet, and the actuator adjusts the intensity of the traveling wave magnetic field generated by the deviation rectifying mechanism according to the control quantity so as to flatten the electrode sheet.

9. A method for correcting the deviation of a pole piece, which uses the non-contact electromagnetic pole piece deviation correction system described in any one of claims 1 to 8, characterized in that, The method includes the following steps: Let the electrode sheet pass through the deviation rectifying channel, and let one end in the width direction of the electrode sheet enter one of the deviation rectifying devices, and the other end in the width direction of the electrode sheet enter the other deviation rectifying device; Detect the relative angle between the electrode sheet and the deviation rectifying device in the deviation rectifying channel and the lateral offset in the width direction; Calculate the deviation from the target value according to the detected relative angle and lateral offset; Respectively adjust the intensity of the traveling wave magnetic field in each deviation rectifying channel so that the relative angle between the electrode sheet and the deviation rectifying device and the lateral offset of the electrode sheet in the width direction reach the target value.

10. The method for correcting the deviation of the pole piece according to claim 9, characterized in that: During the process of respectively adjusting the intensity of the traveling wave magnetic field, the detection module detects the relative angle between the electrode sheet and the deviation rectifying device and the lateral offset of the electrode sheet in the width direction in real time and feeds back to the controller, and the controller adjusts the control quantity in real time according to the detected data.

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