A deviation correction system and a control method thereof

Abstract

This application proposes a web correction system and its control method, including an unwinding web correction actuator, an unwinding web correction sensor, a vision detection unit, a process web correction actuator, a process web correction sensor, and a controller; the controller is connected to other components; the unwinding web correction actuator is located within a first preset distance after the unwinding roller, and the process web correction actuator is located outside a second preset distance after the unwinding web correction actuator; the unwinding web correction sensor is located adjacent to the unwinding web correction actuator, and the process web correction sensor is located adjacent to the process web correction actuator; the vision detection unit is located at the beginning of the composite strip. By integrating and calculating the information collected by the vision detection unit and the information fed back by the web correction sensor, different web correction methods are selected to complete different web correction actions, thereby reducing web correction time, improving web correction efficiency, and improving pre-correction accuracy.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing, and more specifically, to a correction system and its control method. Background Technology

[0002] As new energy vehicles become increasingly integrated into daily life, people are placing higher demands on their safety performance, driving range, and charging speed. Lithium batteries, as a crucial energy source for new energy vehicles, directly impact their performance, and their importance is self-evident.

[0003] During lithium battery production, uneven edges of positive and negative electrode sheet rolls can occur due to interference from factors such as the front-end splicing, winding, incoming material V-angle, tabs, and unwinding processes. Equipment needs to automatically filter this interference and adjust the alignment in real-time based on the roll speed to ensure accuracy while minimizing correction time, enabling continuous production without downtime. The interference filtering and alignment must be completed in the shortest possible time to avoid material waste. Summary of the Invention

[0004] The purpose of this application is to provide a correction system and its control method to at least partially improve the above-mentioned problems.

[0005] To achieve the above objectives, the technical solutions adopted in the embodiments of this application are as follows:

[0006] In a first aspect, embodiments of this application provide a web correction system, the web correction system comprising: an unwinding web correction actuator, an unwinding web correction sensor, a vision detection unit, a process web correction actuator, a process web correction sensor, and a controller;

[0007] The controller is connected to the unwinding correction actuator, the unwinding correction sensor, the vision detection unit, the process correction actuator, and the process correction sensor, respectively.

[0008] The unwinding correction actuator is located within a first preset distance after the unwinding roller, and the process correction actuator is located outside a second preset distance after the unwinding correction actuator.

[0009] The unwinding correction sensor is disposed adjacent to the unwinding correction actuator, and the process correction sensor is disposed adjacent to the process correction actuator;

[0010] The visual inspection unit is located at the beginning of the composite strip.

[0011] Secondly, embodiments of this application provide a method for controlling a deviation correction system, applied to the aforementioned deviation correction system, the method comprising:

[0012] The unwinding correction sensor acquires the first position information of the electrode strip within the unwinding monitoring area and transmits the first position information to the controller;

[0013] The process correction sensor acquires the second position information of the electrode strip within the process monitoring area and transmits the second position information to the controller;

[0014] The visual inspection unit acquires the third distance information on the composite strip and transmits the third distance information to the controller. The third distance information is the distance between the edge of the negative electrode sheet and the edge of the separator, or the distance between the edge of the positive electrode sheet and the edge of the separator.

[0015] The controller controls the unwinding correction actuator and the process correction actuator to perform correction based on the first position information, the second position information, and the third distance information.

[0016] Compared to existing technologies, this application provides a web correction system and its control method. The web correction system includes: an unwinding web correction actuator, an unwinding web correction sensor, a vision detection unit, a process web correction actuator, a process web correction sensor, and a controller. The controller is connected to the unwinding web correction actuator, the unwinding web correction sensor, the vision detection unit, the process web correction actuator, and the process web correction sensor. The unwinding web correction actuator is located within a first preset distance after the unwinding roller, and the process web correction actuator is located outside a second preset distance after the unwinding web correction actuator. The unwinding web correction sensor is located adjacent to the unwinding web correction actuator, and the process web correction sensor is located adjacent to the process web correction actuator. The vision detection unit is located at the beginning of the composite strip. By integrating and calculating the information collected by the vision detection unit and the information fed back by the web correction sensor, different web correction methods are selected to complete different web correction actions, thereby reducing web correction time, improving web correction efficiency, and improving pre-correction accuracy.

[0017] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the correction system provided in the embodiments of this application;

[0020] Figure 2 This is a schematic diagram of the layout of the correction system provided in the embodiments of this application;

[0021] Figure 3 This is a schematic diagram showing the arrangement of the correction sensors provided in an embodiment of this application;

[0022] Figure 4 One of the schematic diagrams showing the distribution of the composite strip provided in the embodiments of this application;

[0023] Figure 5 A second schematic diagram showing the distribution of the composite strip provided in an embodiment of this application;

[0024] Figure 6 This is a flowchart illustrating the control method for the correction system provided in an embodiment of this application.

[0025] In the diagram: 10-Controller; 20-Unwinding correction sensor; 30-Unwinding correction actuator; 40-Process correction sensor; 50-Process correction actuator; 60-Vision inspection unit. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0028] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0030] In the description of this application, it should be noted that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of this application is usually placed in. They 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. Therefore, they should not be construed as limitations on this application.

[0031] In the description of this application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0032] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0033] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of the correction system provided in an embodiment of this application. Figure 1 As shown, the web correction system includes: an unwinding web correction actuator 30, an unwinding web correction sensor 20, a vision detection unit 60, a process web correction actuator 50, a process web correction sensor 40, and a controller 10.

[0034] The controller 10 is connected to the unwinding correction actuator 30, the unwinding correction sensor 20, the vision inspection unit 60, the process correction actuator 50, and the process correction sensor 40.

[0035] Please refer to Figure 2 , Figure 2 This is a schematic diagram of the layout of the correction system provided in an embodiment of this application. Figure 2 As shown, the unwinding correction actuator 30 is located within a first preset distance after the unwinding roller. Optionally, the unwinding correction actuator 30 is located on the first roller after the unwinding roller.

[0036] The process correction actuator 50 is located at a second preset distance after the unwinding correction actuator 30. Optionally, the second preset distance is related to the unwinding length of the electrode strip, and the process correction actuator 50 is located after the unwinding correction actuator 30, at the middle position of the entire strip.

[0037] The unwinding correction sensor 20 is located near the unwinding correction actuator 30, and the process correction sensor 40 is located near the process correction actuator 50.

[0038] The visual inspection unit 60 is located at the beginning of the composite strip.

[0039] In one alternative implementation, the controller 10 can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0040] In one optional implementation, both the unwinding correction actuator 30 and the process correction actuator 50 include a servo motor and a lead screw assembly. The output shaft of the servo motor is fixedly connected to the lead screw assembly. The unwinding mechanism is fixedly mounted on the guide plate, while the lead screw assembly is horizontally connected to the guide plate. The lead screw assembly rotates under the drive of the servo motor to drive the guide plate to move the unwinding mechanism back and forth in the horizontal direction, thereby realizing position correction of the electrode strip during unwinding.

[0041] Please refer to Figure 3 , Figure 3This is a schematic diagram of the arrangement of the correction sensors provided in an embodiment of this application. In one optional implementation, the unwinding correction sensor 20 is disposed adjacent to the unwinding correction actuator 30 and located on the left or right side of the electrode strip. The process correction sensor 40 is disposed adjacent to the process correction actuator 50 and located on the left or right side of the electrode strip. It should be noted that... Figure 3 Only one set of correction sensors is shown, but this is not intended to be limiting. The number of unwinding correction sensors 20 and the data of process correction sensors 40 can both be greater than 1.

[0042] In one alternative implementation, the visual detection unit 60 may, but is not limited to, include a camera or a video camera.

[0043] In one optional implementation, the unwinding correction sensor 20 is used to acquire first position information of the electrode strip within the unwinding monitoring area and transmit the first position information to the controller 10.

[0044] Optionally, the first position information is the distance from the edge of the electrode strip to the unwinding correction sensor 20.

[0045] The process correction sensor 40 is used to acquire the second position information of the electrode strip within the process monitoring area and transmit the second position information to the controller 10.

[0046] Optionally, the second position information is the distance from the edge of the electrode strip to the process correction sensor 40.

[0047] The vision inspection unit 60 is used to acquire the third distance information on the composite strip and transmit the third distance information to the controller 10. The third distance information is the distance between the edge of the negative electrode sheet and the edge of the separator, or the distance between the edge of the positive electrode sheet and the edge of the separator.

[0048] Please refer to Figure 4 and Figure 5 , Figure 4 One of the schematic diagrams showing the distribution of the composite strip provided in the embodiments of this application; Figure 5 This is the second schematic diagram showing the distribution of the composite strip provided in the embodiments of this application.

[0049] Among them, L3a and L3b are both third distance information. L3a represents the distance between the edge of the negative electrode and the edge of the separator, and L3b represents the distance between the edge of the positive electrode and the edge of the separator.

[0050] The visual inspection unit 60 can detect image information at the beginning of the composite strip and then identify it to obtain third distance information (L3a and L3b).

[0051] The controller 10 is used to control the unwinding correction actuator 30 and the process correction actuator 50 to perform correction based on the first position information, the second position information and the third distance information.

[0052] In this application, the controller 10 integrates and calculates the third distance information collected by the vision detection unit 60 with the first position information and the second position information fed back by the correction sensor data, selects different correction methods, and completes different correction actions to achieve the purpose of reducing correction time, improving correction efficiency, and improving pre-correction accuracy.

[0053] Optionally, the controller 10 is used to filter multiple sets of first position information corresponding to the received first current electrode, and obtain the first average value of the filtered first position information.

[0054] During the unwinding process of the unwinding mechanism, the electrode strip moves towards the target direction at a preset speed. Each electrode on the electrode strip will pass through the monitoring area corresponding to the unwinding correction sensor 20. The time it takes for the electrode to pass through the monitoring area corresponding to the unwinding correction sensor 20 is T. The unwinding correction sensor 20 samples at a preset frequency, for example, a sampling interval of 5ms. Within the time T, the unwinding correction sensor 20 will collect multiple sets of first position information corresponding to the first current electrode.

[0055] Please continue to refer to this. Figure 3 Because the electrode has tabs and V-angles, when the unwinding correction sensor 20 detects the tabs and V-angles, the first position information will fluctuate greatly. The fluctuations caused by the tabs and V-angles will cause problems for correction. Therefore, it is necessary to filter the multiple sets of first position information corresponding to the first current electrode.

[0056] Optionally, the filtering process here refers to removing the first n and last n groups of multiple sets of first position information sorted from largest to smallest (or smallest to largest), for example, removing 10 groups each of the largest and smallest. Optionally, n is determined by the duration T and the sampling interval.

[0057] After filtering, the average value of the remaining first position information is calculated to obtain the first average value.

[0058] The controller 10 is used to calculate based on the first average value and the first preset standard value to obtain the first fluctuation value.

[0059] Optionally, the first preset standard value can represent the standard distance from the edge of the electrode strip to the unwinding correction sensor 20 when the electrode strip is centered. The difference between the first average value and the first preset standard value can reflect the first fluctuation value of the electrode strip.

[0060] The controller 10 is used to obtain a first offset value based on the first fluctuation value corresponding to the first current electrode and the first fluctuation value corresponding to the previous electrode before the first current electrode.

[0061] Optionally, the first offset value is the difference between the first fluctuation value corresponding to the first current electrode and the first fluctuation value corresponding to the previous electrode before the first current electrode.

[0062] The controller 10 is used to filter multiple sets of second position information corresponding to the received second current electrode, and to obtain the second average value of the filtered second position information.

[0063] During the unwinding process of the unwinding mechanism, the electrode strip moves towards the target direction at a preset speed. Each electrode on the electrode strip will pass through the monitoring area corresponding to the process correction sensor 40. The time it takes for the electrode to pass through the monitoring area corresponding to the process correction sensor 40 is T. The process correction sensor 40 samples at a preset frequency, for example, a sampling interval of 5ms. Within the time T, the process correction sensor 40 will collect multiple sets of second position information corresponding to the second current electrode.

[0064] As mentioned earlier, because the electrode has tabs and V-angles, the second position information fluctuates significantly when the process correction sensor 40 detects the tabs and V-angles. These fluctuations can hinder the correction process. Therefore, it is necessary to filter the multiple sets of second position information corresponding to the current second electrode.

[0065] Optionally, the filtering process here refers to removing the first n and last n groups of multiple sets of second position information sorted from largest to smallest (or smallest to largest), for example, removing 10 groups each from the largest and smallest. Optionally, n is determined by the duration T and the sampling interval.

[0066] After filtering, the average value of the remaining second location information is calculated to obtain the second average value.

[0067] The controller 10 is used to calculate a second fluctuation value based on a second average value and a second preset standard value.

[0068] Optionally, the second preset standard value can represent the standard distance from the edge of the electrode strip to the process correction sensor 40 when the electrode strip is centered. The difference between the second average value and the second preset standard value can reflect the second fluctuation value of the electrode strip.

[0069] The controller 10 is used to obtain a second offset value based on the second fluctuation value corresponding to the second current electrode and the second fluctuation value corresponding to the previous electrode before the second current electrode.

[0070] Optionally, the second offset value is the difference between the second fluctuation value corresponding to the second current electrode and the second fluctuation value corresponding to the two previous electrodes preceding the current electrode.

[0071] In this application, the presence of tabs and V-angles in the strip can lead to excessive adjustment range, poor correction effect, and delays in the correction process. This application addresses this by using a correction sensor to detect tab and V-angle data, and employing an average value filtering algorithm to process the raw data, filtering out their impact on the correction mechanism. This forces the correction sensor to focus on the strip positions without tabs or V-angles to complete the correction, thereby achieving the goals of strip identification, improved correction efficiency, and reduced unnecessary correction actions.

[0072] In one alternative implementation, the controller 10 is used to obtain a third offset value based on third distance information and a third preset standard value.

[0073] Optionally, the third offset value represents the difference between the position of the electrode to the edge of the separator detected by the visual inspection unit 60 and the value set in the cell manufacturing process.

[0074] Optionally, the controller 10 is used to acquire a third average value of a third distance information transmitted by the vision detection unit 60 for a consecutive preset number of groups.

[0075] In this application, to improve the adaptive capability of the material strip correction, visual data feedback is added, and the third distance information of a preset number of consecutive sets transmitted by the vision detection unit 60 is obtained to achieve full closed-loop control. Optionally, to ensure the accuracy of the third distance information, the third average value of the third distance information of a preset number of consecutive sets transmitted by the vision detection unit 60 can be obtained, for example, the average value is taken cyclically within 10 pieces to achieve closed-loop control of the correction.

[0076] Optionally, the controller is also used to obtain a third offset value based on a third average value and a third preset standard value.

[0077] The third preset standard value can represent the standard distance between the edge of the negative electrode and the edge of the separator when the electrode strip is centered, or the standard distance between the edge of the positive electrode and the edge of the separator.

[0078] Optionally, the third offset value is the difference between the third average value and the third preset standard value.

[0079] In one optional implementation, the controller 10 is used to obtain a first correction distance and a second correction distance based on a first offset value, a second offset value, a third offset value, and a fourth preset standard value.

[0080] The fourth preset standard value can be the reference value of the correction sensor (the center value of the material strip). Optionally, the fourth preset standard value is the center value of the material strip designed according to the mechanical structure.

[0081] Optionally, in this application, the preset standard value (any one of the first preset standard value, the second preset standard value, and the fourth preset standard value) is the distance from the edge of the unwinding roller or the overwind roller in the mechanical design to the center of the overall large plate of the equipment.

[0082] Optionally, the first correction distance = first offset value + third offset value - fourth preset standard value; the second correction distance = second offset value + third offset value - fourth preset standard value. The first correction distance and the second correction distance represent the distance that the guide plate needs to move left and right by the motor.

[0083] Optionally, when the target object of the correction is a positive electrode strip, the third offset value is the value obtained based on L3b; when the target object of the correction is a negative electrode strip, the third offset value is the value obtained based on L3a, where L3a represents the distance between the edge of the negative electrode strip and the edge of the separator, and L3b represents the distance between the edge of the positive electrode strip and the edge of the separator.

[0084] Compared to traditional correction control that relies entirely on data detected by correction sensors to complete correction actions, but cannot monitor and adjust the detection results in a closed loop, this application uses visual detection data to complete the closed-loop adjustment of the correction effect, overcoming the abnormal detection situation of the sensors.

[0085] In one alternative implementation, the controller 10 is used to control the unwinding correction actuator 30 and the process correction actuator 50 to perform correction based on a first correction distance and a second correction distance.

[0086] Optionally, the controller 10 is used to control the unwinding correction actuator 30 to perform correction when the first correction distance is greater than the first threshold and the second correction distance is less than or equal to the first threshold.

[0087] Optionally, if the first correction distance is greater than the first threshold and the second correction distance is less than or equal to the first threshold, the unwinding correction actuator 30 is controlled to perform correction according to the first correction distance, for example, the guide plate is moved in the corresponding direction (left or right) by the first correction distance.

[0088] Optionally, the controller 10 is used to control the process correction actuator 50 to perform correction when the first correction distance is less than or equal to the first threshold and the second correction distance is greater than the first threshold.

[0089] Optionally, if the first correction distance is less than or equal to the first threshold and the second correction distance is greater than the first threshold, the correction actuator 50 performs correction according to the second correction distance control process, for example, by moving the guide plate to the corresponding direction (left or right) by the second correction distance.

[0090] Optionally, the controller 10 is used to control the unwinding correction actuator 30 and the process correction actuator 50 to perform correction synchronously when the first correction distance is greater than the first threshold and the second correction distance is greater than the first threshold.

[0091] Optionally, if the first correction distance is greater than the first threshold and the second correction distance is greater than the first threshold, the unwinding correction actuator 30 is controlled to perform correction according to the first correction distance and the process correction actuator 50 is controlled to perform correction according to the second correction distance, and the two are performed simultaneously.

[0092] Optionally, when the fluctuation amplitude of the electrode strip exceeds the fluctuation threshold, the controller 10 controls the unwinding correction actuator 30 and the process correction actuator 50 to perform correction synchronously.

[0093] In this application, the correction action is autonomously selected, preventing the impact of strip wavy edges on correction accuracy during high-speed operation. Traditional correction functions, upon detecting wavy edges, will execute a correction action. However, at high strip speeds, the correction mechanism may oscillate back and forth, failing to achieve the intended correction and resulting in correction failure. Using only the fluctuation values ​​of the correction sensor to calculate correction-related data introduces significant errors, causing strip skew. This application's solution combines visual inspection data (third-distance information) for comprehensive calculation, greatly reducing the correction error caused by strip wavy edges during electrode unwinding.

[0094] The method for controlling a deviation correction system provided in this application can be applied to, but is not limited to, the deviation correction system described above. For the specific process, please refer to... Figure 6 The control methods of the correction system include: S101, S102, S103 and S104, which are described in detail below.

[0095] S101, the unwinding correction sensor acquires the first position information of the electrode strip in the unwinding monitoring area and transmits the first position information to the controller.

[0096] S102, the process correction sensor acquires the second position information of the electrode strip within the process monitoring area and transmits the second position information to the controller.

[0097] S103, the vision inspection unit acquires the third distance information on the composite strip and transmits the third distance information to the controller.

[0098] The third distance information is either the distance between the edge of the negative electrode and the edge of the separator, or the distance between the edge of the positive electrode and the edge of the separator.

[0099] S104, the controller controls the unwinding correction actuator and the process correction actuator to perform correction based on the first position information, the second position information and the third distance information.

[0100] Optionally, in step S104, the controller controls the unwinding correction actuator and the process correction actuator to perform correction steps based on the first position information, the second position information, and the third distance information, including steps S104-1, S104-2, S104-3, S104-4, and S104-5, which are described in detail below.

[0101] S104-1, The controller obtains the first offset value based on the first position information and the first preset standard value.

[0102] S104-2, the controller obtains the second offset value based on the second position information and the second preset standard value.

[0103] S104-3, the controller obtains the third offset value based on the third distance information and the third preset standard value.

[0104] S104-4, the controller obtains the first correction distance and the second correction distance based on the first offset value, the second offset value, the third offset value and the fourth preset standard value.

[0105] S104-5, the controller controls the unwinding correction actuator and the process correction actuator to perform correction based on the first correction distance and the second correction distance.

[0106] It should be noted that the correction system control method provided in this embodiment can execute the functions of each module shown in the above system embodiments to achieve the corresponding technical effects. For the sake of brevity, any parts not mentioned in this embodiment can be referred to the corresponding content in the above embodiments.

[0107] In summary, this application provides a web correction system and its control method. The web correction system includes: an unwinding web correction actuator, an unwinding web correction sensor, a vision detection unit, a process web correction actuator, a process web correction sensor, and a controller. The controller is connected to the unwinding web correction actuator, the unwinding web correction sensor, the vision detection unit, the process web correction actuator, and the process web correction sensor. The unwinding web correction actuator is located within a first preset distance after the unwinding roller, and the process web correction actuator is located outside a second preset distance after the unwinding web correction actuator. The unwinding web correction sensor is located adjacent to the unwinding web correction actuator, and the process web correction sensor is located adjacent to the process web correction actuator. The vision detection unit is located at the beginning of the composite strip. By integrating and calculating the information collected by the vision detection unit and the information fed back by the web correction sensor, different web correction methods are selected to complete different web correction actions, thereby reducing web correction time, improving web correction efficiency, and improving pre-correction accuracy.

[0108] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

[0109] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this application. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A deviation correction system, characterized in that, The correction system includes: an unwinding correction actuator, an unwinding correction sensor, a vision detection unit, a process correction actuator, a process correction sensor, and a controller; The controller is connected to the unwinding correction actuator, the unwinding correction sensor, the vision detection unit, the process correction actuator, and the process correction sensor, respectively. The unwinding correction actuator is located within a first preset distance after the unwinding roller, and the process correction actuator is located outside a second preset distance after the unwinding correction actuator. The unwinding correction sensor is disposed adjacent to the unwinding correction actuator, and the process correction sensor is disposed adjacent to the process correction actuator; The visual inspection unit is located at the beginning of the composite strip; The unwinding correction sensor is used to acquire the first position information of the electrode strip within the unwinding monitoring area and transmit the first position information to the controller; The process correction sensor is used to acquire the second position information of the electrode strip within the process monitoring area and transmit the second position information to the controller; The visual inspection unit is used to acquire third distance information on the composite strip and transmit the third distance information to the controller, wherein the third distance information is the distance between the edge of the negative electrode sheet and the edge of the separator, or the distance between the edge of the positive electrode sheet and the edge of the separator. The controller is used to control the unwinding correction actuator and the process correction actuator to perform correction based on the first position information, the second position information and the third distance information.

2. The correction system as described in claim 1, characterized in that, The controller is used to obtain a first offset value based on the first position information and a first preset standard value; The controller is used to obtain a second offset value based on the second position information and a second preset standard value; The controller is used to obtain a third offset value based on the third distance information and the third preset standard value; The controller is used to obtain a first correction distance and a second correction distance based on the first offset value, the second offset value, the third offset value, and a fourth preset standard value; The controller is used to control the unwinding correction actuator and the process correction actuator to perform correction based on the first correction distance and the second correction distance.

3. The correction system as described in claim 2, characterized in that, The controller is used to filter multiple sets of the first position information corresponding to the first current electrode, and obtain the first average value of the filtered first position information. The controller is used to calculate, based on the first average value and the first preset standard value, to obtain a first fluctuation value; The controller is used to obtain a first offset value based on the first fluctuation value corresponding to the first current electrode and the first fluctuation value corresponding to the previous electrode before the first current electrode.

4. The correction system as described in claim 2, characterized in that, The controller is used to filter multiple sets of the second position information corresponding to the received second current electrode, and to obtain the second average value of the filtered second position information; The controller is used to calculate, based on the second average value and the second preset standard value, to obtain the second fluctuation value; The controller is used to obtain a second offset value based on the second fluctuation value corresponding to the second current electrode and the second fluctuation value corresponding to the previous electrode before the second current electrode.

5. The correction system as described in claim 2, characterized in that, The controller is used to obtain the third average value of the third distance information transmitted by the visual detection unit for a consecutive preset number of groups; The controller is also used to obtain a third offset value based on the third average value and the third preset standard value.

6. The correction system as described in claim 2, characterized in that, The controller is used to control the unwinding correction actuator to perform correction when the first correction distance is greater than the first threshold and the second correction distance is less than or equal to the first threshold. The controller is used to control the process correction actuator to perform correction when the first correction distance is less than or equal to the first threshold and the second correction distance is greater than the first threshold. The controller is used to control the unwinding correction actuator and the process correction actuator to perform correction synchronously when the first correction distance is greater than the first threshold and the second correction distance is greater than the first threshold.

7. The correction system as described in claim 2, characterized in that, The controller is used to control the unwinding correction mechanism and the process correction mechanism to perform correction synchronously when the fluctuation amplitude of the electrode strip is greater than the fluctuation threshold.

8. A control method for a deviation correction system, characterized in that, The method, applied to the correction system according to any one of claims 1-7, comprises: The unwinding correction sensor acquires the first position information of the electrode strip within the unwinding monitoring area and transmits the first position information to the controller; The process correction sensor acquires the second position information of the electrode strip within the process monitoring area and transmits the second position information to the controller; The visual inspection unit acquires the third distance information on the composite strip and transmits the third distance information to the controller. The third distance information is the distance between the edge of the negative electrode sheet and the edge of the separator, or the distance between the edge of the positive electrode sheet and the edge of the separator. The controller controls the unwinding correction actuator and the process correction actuator to perform correction based on the first position information, the second position information, and the third distance information.

9. The control method for the correction system as described in claim 8, characterized in that, The controller, based on the first position information, the second position information, and the third distance information, controls the unwinding correction actuator and the process correction actuator to perform correction steps, including: The controller obtains a first offset value based on the first position information and a first preset standard value; The controller obtains a second offset value based on the second position information and the second preset standard value; The controller obtains a third offset value based on the third distance information and the third preset standard value; The controller obtains the first correction distance and the second correction distance based on the first offset value, the second offset value, the third offset value, and the fourth preset standard value; The controller controls the unwinding correction actuator and the process correction actuator to perform correction based on the first correction distance and the second correction distance.

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