A control system and method for a wound core tab

Abstract

This invention discloses a core tab control system and method. The system includes thickness-measuring laser sensors positioned on the upper and lower sides of the electrode sheet. A moving module moves the laser sensors to measure thickness data at different points on the electrode sheet. An algorithm model of "electrode thickness - laser cutting - variable diameter winding needle" is trained. The electrode thickness is calculated based on the thickness data from the measurement points and input into the algorithm model to obtain laser cutting adjustment values ​​and variable diameter winding needle adjustment values. The system then controls the laser cutting and variable diameter winding needles to complete their corresponding mechanical actions. This invention enables real-time adjustment of the tab spacing and electrode winding, avoiding the post-feedback adjustment of traditional methods, thus improving core yield and production line efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lithium battery manufacturing, in particular to a winding core tab control system and method. BACKGROUND

[0002] In the process of winding the pole piece into a winding core, it is easy to cause tab misplacement and poor pole piece coverage, etc. The poor quality will cause the winding core to be scrapped, reduce the winding core yield, increase the time for manual processing of poor quality winding cores, waste labor costs and reduce the production line operation efficiency.

[0003] Currently, in the actual production process, the adjustment of the tab position and the winding of the pole piece can only be carried out when the tab is mispositioned and the pole piece coverage is poor, that is, the feedback of the tab mispositioning and the poor pole piece coverage, which makes the adjustment of the tab mispositioning and the winding of the pole piece seriously lag, resulting in a large number of scrapped winding cores. SUMMARY

[0004] In view of the above problems, the present application provides a winding core tab control system and method to improve the reliability, stability and production line efficiency of the battery winding core tab control system and method.

[0005] To achieve the above purpose, the present application realizes the following technical solutions:

[0006] On the one hand, the present application provides a winding core tab control system, comprising:

[0007] A moving module for driving the thickness measuring laser sensor to move, measuring the thickness data of the measuring points at different positions of the pole piece, and driving the laser to perform the tab cutting action;

[0008] A calculation module for calculating the laser cutting adjustment value and the variable diameter winding needle adjustment value based on the thickness data of the measuring points, and sending them to the laser cutting and variable diameter winding needle control mechanism.

[0009] Preferably, the calculation module is configured in the upper computer, and the laser sensor is in communication connection with the upper computer.

[0010] Preferably, the moving module comprises a thickness measuring laser sensor moving module and a laser cutting moving module,

[0011] The thickness measuring laser sensor moving module is used to drive the thickness measuring laser sensor to move left and right, measure the thickness data of the measuring points at different positions of the pole piece, and transmit them to the upper computer;

[0012] The laser cutting moving module is used to drive the laser to move up and down to perform the tab cutting action.

[0013] In this preferred embodiment, the thickness measurement laser sensor is moved left and right by the thickness measurement laser sensor moving module to realize the thickness measurement of the measuring points within the entire electrode width range, and the electrode tab is cut by the laser cutting moving module to move the laser up and down.

[0014] Preferably, the thickness measuring laser sensor and the thickness measuring laser sensor moving module are provided in two sets, located on the upper and lower sides of the electrode sheet being conveyed on the roller, respectively.

[0015] The thickness-measuring laser sensor moving module is arranged parallel to the electrode, and its moving range covers the entire width of the electrode.

[0016] The thickness measuring laser sensor is mounted on the thickness measuring laser sensor moving module by a fixed bracket, and the fixed bracket can move left and right along the thickness measuring laser sensor moving module.

[0017] The distance between the thickness-measuring laser sensor and the electrode plate meets the sensor's measurement distance requirements.

[0018] In this preferred embodiment, the thickness of the electrode is calculated by measuring the thickness data using laser sensors on both the top and bottom sides. The laser sensors are based on the laser triangulation method for measurement.

[0019] Preferably, the measurement points are set according to the electrode width, electrode flow velocity, and individual electrode length.

[0020] In this preferred embodiment, the electrode thickness measurement points are adjusted according to changes in electrode width, electrode flow rate, and individual electrode length, making electrode thickness measurement more flexible and adaptable, which helps to improve efficiency and cycle time, and enhance measurement flexibility.

[0021] Preferably, the laser cutting moving module is located above the electrode and parallel to the electrode;

[0022] The laser is mounted on the laser cutting moving module via a fixed connection module. The fixed connection module can move up and down along the laser cutting moving module. The laser is used to perform tab cutting after moving to a suitable position.

[0023] In this preferred embodiment, the laser is moved up and down to a suitable position by the laser cutting moving module to achieve electrode cutting.

[0024] Preferably, the calculation module is configured with an algorithm model of "electrode thickness - laser cutting - variable diameter needle winding".

[0025] The calculation module is specifically used for,

[0026] Calculate the electrode thickness based on the thickness data from the measurement points;

[0027] The electrode thickness is input into the "electrode thickness-laser cutting-variable diameter winding" algorithm model to obtain the laser cutting adjustment value and the variable diameter winding adjustment value; the laser cutting adjustment value is the laser cutting position, and the variable diameter winding adjustment value is the inner diameter of the winding drum.

[0028] In this preferred solution, by establishing the correspondence between electrode thickness and laser cutting position and inner diameter of the roll, the laser cutting adjustment value and the variable diameter winding needle adjustment value are output according to the electrode thickness at the measuring point. This enables real-time adjustment of the electrode tab spacing and electrode winding, avoiding the back feedback adjustment of traditional methods, and improving the core yield and production line operating efficiency.

[0029] Preferably, the calculation module calculates the electrode thickness based on the thickness data of the measurement points, specifically as follows:

[0030] Let H be the distance between the thickness-measuring laser sensors located on the upper and lower sides of the electrode. Let S1 be the distance from the upper thickness-measuring laser sensor to the electrode and S2 be the distance from the lower thickness-measuring laser sensor to the electrode. Then the thickness of the electrode is H-S1-S2.

[0031] Secondly, the present invention provides a control method based on the above-mentioned core tab control system, comprising:

[0032] Thickness data of the electrode sheet is obtained at different measurement points based on a thickness-measuring laser sensor.

[0033] The electrode thickness at the measurement point is calculated based on the thickness data of the measurement point.

[0034] The laser cutting adjustment value and the variable diameter winding needle adjustment value are calculated based on the electrode thickness and sent to the laser cutting and variable diameter winding needle control mechanism.

[0035] Preferably, the calculation of the laser cutting adjustment value and the variable diameter winding needle adjustment value based on the electrode thickness includes:

[0036] An algorithm model for "electrode thickness - laser cutting - variable diameter coiling" was obtained based on deep learning algorithm training;

[0037] The electrode thickness is input into the "electrode thickness-laser cutting-variable diameter winding" algorithm model to obtain the laser cutting adjustment value and the variable diameter winding adjustment value; the laser cutting adjustment value is the laser cutting position, and the variable diameter winding adjustment value is the inner diameter of the winding drum;

[0038] The data processing procedure of the "electrode thickness-laser cutting-variable diameter winding" algorithm model is as follows:

[0039] Calculate the absolute value of the difference in electrode thickness at the measurement point based on the electrode thickness at the measurement point and the standard electrode thickness.

[0040] If the absolute value of the thickness difference is less than the set standard value for thickness difference, then the radius of the variable diameter needle coil is adjusted as follows:

[0041] R1 = R + (ΔH - H1) × r;

[0042] Wherein, R1 is the adjusted radius of the variable diameter coiling needle, R is the radius of the variable diameter coiling needle corresponding to the standard thickness of the electrode sheet, r is the adjustment amount, H1 is the minimum thickness adjustment threshold, ΔH is the absolute value of the thickness difference, ΔH=│H0-H│, H0 is the electrode sheet thickness at the measurement point, and H is the standard thickness of the electrode sheet.

[0043] If the absolute value of the thickness difference is greater than or equal to the set standard value for thickness difference, then the laser cutting tab spacing is adjusted as follows:

[0044] S = Sn + (ΔH - H2) × s;

[0045] Where S is the adjusted laser cutting tab spacing, Sn is the laser cutting tab spacing under standard conditions, s is the adjustment amount, and H2 is the minimum thickness adjustment threshold.

[0046] The adjustment of the laser cutting electrode spacing is converted into the adjustment of the laser cutting position.

[0047] In this preferred embodiment, a two-stage adjustment control method is adopted. When the absolute value of the thickness difference is less than the standard value, the radius of the variable diameter winding needle is adjusted. When the absolute value of the thickness difference is greater than the standard value, it indicates that the control strategy for adjusting the radius of the variable diameter winding needle can no longer adjust the position of the electrode tab to within the process standard position. Therefore, the laser cutting electrode tab spacing is adjusted. Based on this, the accuracy of the adjustment process can be effectively increased.

[0048] Preferably, the minimum thickness adjustment threshold H1, the minimum thickness adjustment threshold H2, the adjustment amount r, and the adjustment amount s are obtained based on deep learning algorithm training, and the training method is as follows:

[0049] Data sets of electrode thickness, laser cutting position, and roll inner diameter are obtained based on the aforementioned core electrode control system.

[0050] The acquired dataset was used to learn the correspondence between electrode thickness and laser cutting position and roll inner diameter, and the minimum thickness adjustment threshold H1, minimum thickness adjustment threshold H2, adjustment amount r and adjustment amount s were obtained.

[0051] In this preferred solution, deep learning technology is used to learn from a large amount of experimental data to find the correspondence between electrode thickness, laser cutting position, and inner diameter of the roll. Based on the algorithm model of "electrode thickness-laser cutting-variable diameter winding needle", the laser cutting adjustment value and the variable diameter winding needle adjustment value are obtained, realizing the real-time adjustment of electrode tab spacing and electrode winding. This avoids the back-feedback adjustment of traditional methods, improves the yield of core and the efficiency of production line operation.

[0052] Preferably, the laser cutting and variable diameter winding needle control mechanism adopts a programmable controller for winding equipment;

[0053] The host computer sends the calculated laser cutting adjustment value and variable diameter winding needle adjustment value to the programmable controller of the winding equipment via the Modbus TCP protocol. The programmable controller of the winding equipment controls the laser cutting and variable diameter winding needle mechanism to perform logical actions according to the adjustment values ​​based on the received data.

[0054] Preferably, the programmable controller of the winding equipment has a reserved D-element register for storing the laser cutting position and the inner diameter of the roll.

[0055] Preferably, after the logical action is completed, the current D element register data is cleared, and the programmable controller of the winding device feeds back the winding core completion result to the host computer, and optimizes the "electrode thickness-laser cutting-variable diameter winding needle" algorithm model based on the feedback result.

[0056] Preferably, the method further includes:

[0057] Set upper and lower limits for electrode thickness and set a threshold for the number of times electrode thickness exceeds the limit.

[0058] An alarm is triggered when the calculated electrode thickness exceeds the upper and lower limits of the electrode thickness, and an alarm is triggered when the number of times the electrode thickness exceeds the threshold of the number of times the electrode thickness exceeds the limit.

[0059] In this preferred solution, by adding an alarm function, the production line equipment personnel are alerted to intervene and handle the situation, which makes the production line run more smoothly and improves the efficiency of production line operation.

[0060] The beneficial effects of this invention are as follows:

[0061] This invention provides a core tab control system that uses a thickness-measuring laser sensor to measure the thickness of the electrode sheet. Based on deep learning algorithm technology, the system trains the laser cutting and variable diameter winding needle adjustment values ​​that should be adjusted to control the electrode sheet thickness, obtaining an algorithm model of "electrode sheet thickness-laser cutting-variable diameter winding needle". Then, based on the measured electrode sheet thickness data, the system obtains the laser cutting and variable diameter winding needle adjustment values, which facilitates timely adjustment of the tab position and electrode sheet winding, effectively reducing core scrap and improving production line operating efficiency.

[0062] In the core tab control system provided by this invention, the electrode thickness measurement point is adjusted according to the changes in electrode width, electrode flow speed and single electrode length, making electrode thickness measurement more flexible and versatile, which helps to improve efficiency and cycle time, and enhance measurement flexibility.

[0063] In the core tab control method provided by this invention, the upper and lower limits of the electrode thickness are set, and an alarm function for electrode thickness exceeding the limit is added. When there are too many alarms for the same roll of electrode thickness exceeding the limit, it indicates that the current roll of electrode thickness is seriously abnormal. The added alarm function reminds the production line equipment personnel to intervene and handle the problem, so that the production line runs more smoothly and improves the production line operating efficiency. Attached Figure Description

[0064] Figure 1 This is a schematic diagram of the winding core tab control method provided by the present invention;

[0065] Figure 2 This is a schematic diagram of the electrode thickness, laser cutting, and variable diameter winding algorithm model provided by the present invention;

[0066] Figure 3 This is a schematic diagram of electrode thickness measurement provided by the present invention;

[0067] Figure 4 This is a schematic diagram of the installation of the thickness measurement laser sensor provided by the present invention;

[0068] Figure 5 This is a schematic diagram of the laser installation provided by the present invention;

[0069] Figure 6 This is a schematic diagram of the variable diameter coiling needle provided by the present invention. Detailed Implementation

[0070] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0071] It should also be noted that, in order to avoid obscuring the invention with unnecessary details, only the structures and / or processing steps closely related to the solution according to the invention are shown in the accompanying drawings, while other details that are not closely related to the invention are omitted.

[0072] It should be emphasized that the term "including / comprises" as used herein refers to the presence of a feature, element, step, or component, but does not exclude the presence or addition of one or more other features, elements, steps, or components.

[0073] It should also be noted that, unless otherwise specified, the term "connection" in this article can refer not only to a direct connection, but also to an indirect connection involving an intermediary.

[0074] In the following description, embodiments of the invention will be illustrated with reference to the accompanying drawings. In the drawings, the same reference numerals represent the same or similar parts, or the same or similar steps.

[0075] It should be emphasized here that the step markers mentioned below are not a limitation on the order of the steps, but should be understood as meaning that the steps can be executed in the order mentioned in the embodiments, or in a different order than in the embodiments, or several steps can be executed simultaneously.

[0076] During the process of forming a core from electrode sheets by winding equipment, problems such as electrode tab misalignment and poor electrode sheet coverage are very likely to occur. Defects will result in scrapped cores, reduce the core yield, increase the time for manual handling of defective cores, waste labor costs, and reduce production line operating efficiency.

[0077] To address the aforementioned problems, the first aspect of this invention provides a core tab control system that improves the reliability, stability, and production line efficiency of the core tab control system.

[0078] like Figures 3-5 As shown, the present invention provides a core tab control system comprising: a moving module, a thickness laser sensor, a laser, and a host computer.

[0079] Specifically, the moving module includes a thickness-measuring laser sensor moving module 104 and a laser-cutting moving module 106.

[0080] The thickness measurement laser sensor moving module 104 is used to drive the thickness measurement laser sensor 102 to move left and right, measure the thickness of the electrode at different positions, obtain multiple sets of electrode thickness data, and transmit them to the host computer.

[0081] The laser cutting moving module 106 is used to drive the laser 107 to move up and down to complete the electrode cutting action.

[0082] It should be noted that the measurement frequency is set based on the electrode flow rate.

[0083] See Figure 3 and Figure 4 In this invention, two sets of thickness laser sensors 102 and thickness laser sensor moving modules 104 are provided, located on the upper and lower sides of the electrode 101 being transported on the roller 103, respectively; the distance between the thickness laser sensor 102 and the electrode is sufficient to meet the sensor measurement distance.

[0084] Both sets of thickness-measuring laser sensors 102 are mounted on the thickness-measuring laser sensor moving module 104 via fixed brackets 105. The fixed brackets 105 can move left and right along the thickness-measuring laser sensor moving module 104, thereby driving the thickness-measuring laser sensors 102 to move left and right. The thickness-measuring laser sensors 102 are used to measure the thickness of the electrode at different measurement points within the moving range and transmit the thickness data to the host computer.

[0085] It should be noted that the thickness-measuring laser sensor moving module 104 is set parallel to the electrode sheet, and its moving range covers the entire width of the electrode sheet. The upper and lower thickness-measuring laser sensors move and measure simultaneously, enabling thickness measurement at different points across the entire width of the electrode sheet.

[0086] In this invention, the working principle of the thickness measurement laser sensor is laser triangulation. A visible red laser is projected onto the surface of the object being measured through a lens. The laser reflected by the object passes through the receiver lens and is received by the internal CCD linear camera. Depending on the distance, the CCD linear camera can capture the light spot at different angles. Based on this angle and the known distance between the laser and the camera, the digital signal processor can calculate the distance between the sensor and the object being measured, and then calculate the electrode thickness.

[0087] The electrode thickness is calculated as follows: The distance between the upper sensor and the lower sensor is H. The measured distance from the upper sensor to the electrode is S1, and the distance from the lower sensor to the electrode is S2. Therefore, the electrode thickness is H-S1-S2.

[0088] Furthermore, in this invention, the electrode thickness measurement point is adjusted according to the changes in electrode width, electrode flow rate, and individual electrode length, making electrode thickness measurement more flexible and adaptable, which helps to improve efficiency and cycle time, and enhance measurement flexibility.

[0089] See Figure 5 In this invention, the laser cutting moving module 106 is located above the electrode and parallel to the electrode. The laser 107 is mounted on the laser cutting moving module 106 through the fixed connection module 108. The fixed connection module 108 can move up and down along the laser cutting moving module 106, thereby driving the laser 107 to move up and down. After the laser 107 moves to the appropriate position, it performs the electrode cutting action.

[0090] In this invention, a computing module is configured in the host computer.

[0091] The calculation module calculates the laser cutting adjustment value and the variable diameter winding needle adjustment value based on the electrode thickness and sends them to the programmable controller of the winding equipment. The programmable controller of the winding equipment controls the laser cutting and variable diameter winding needle to complete the corresponding mechanism actions according to the laser cutting adjustment value and the variable diameter winding needle adjustment value.

[0092] See Figure 2 In this invention, the calculation module adopts an algorithm model of "electrode thickness - laser cutting - variable diameter winding needle" to calculate the laser cutting adjustment value and the variable diameter winding needle adjustment value based on the measured electrode thickness. The laser cutting adjustment value is the laser cutting position; the variable diameter winding needle adjustment value is the inner diameter of the winding drum.

[0093] Furthermore, an algorithm model for "electrode thickness - laser cutting - variable diameter winding" was trained based on deep learning algorithms to obtain the correspondence between electrode thickness and laser cutting position and inner diameter of the winding cylinder.

[0094] Based on the aforementioned core tab control system, another aspect of the present invention provides a core tab control method, which uses the aforementioned core tab control system to control the core tab. (See also...) Figure 1 The specific process of this method is as follows:

[0095] S1. The lithium battery electrode sheet is conveyed by rollers. The thickness laser sensor moving module 104 drives the thickness laser sensor 102 to the measurement point of the electrode sheet. The electrode sheet passes the thickness laser sensor 102, triggering the thickness laser sensor 102 to start measurement and uploading the measurement data to the host computer. The host computer calculates the electrode sheet thickness based on the measurement data.

[0096] S2. Input the electrode thickness data into the "Electrode Thickness - Laser Cutting - Variable Diameter Coiling Needle" algorithm model to obtain the laser cutting adjustment value and the variable diameter coiling needle adjustment value. The laser cutting adjustment value includes the laser cutting position value L, and the variable diameter coiling needle adjustment value includes the inner diameter of the coiling drum R. Perform data protection analysis on the laser cutting position value L and the inner diameter of the coiling drum R.

[0097] S3. After parsing, the values ​​are sent to the programmable controller of the winding equipment via Modbus TCP protocol;

[0098] The reserved component register of the programmable controller of the winding equipment is used to store the laser cutting position value L and the inner diameter of the drum;

[0099] S4. After receiving the data, the programmable controller of the winding equipment controls the laser cutting and variable diameter winding needle mechanism to perform logical actions according to the adjustment value, such as: the laser completing the electrode tab cutting action of a single electrode sheet, the variable diameter winding needle adjusting the inner diameter of the winding drum, and winding the core according to different winding speeds and winding drum tension.

[0100] S5. After the action is completed, the data in the current D element register is cleared, that is, a set of actions is completed to clear the value stored at the current D element address; the programmable controller of the winding equipment feeds back the winding core completion result to the host computer, and continuously optimizes the "electrode thickness-laser cutting-variable diameter winding needle" algorithm model based on the feedback result; repeat the above process until the winding equipment completes all the winding cores.

[0101] In this invention, the "electrode thickness-laser cutting-variable diameter winding" algorithm model calculates the laser cutting adjustment value and the variable diameter winding adjustment value, as follows:

[0102] The standard thickness of the electrode is set as H, the corresponding strain gauge radius of the standard thickness is R, and the laser-cut electrode tab spacing parameters are S1, S2, S3...S29 (based on 30 electrodes). The standard value for the corresponding thickness difference is Hp. The actual measured electrode thickness is H0, and the absolute value of the thickness difference at the electrode measurement points is ΔH = |H0 - H|.

[0103] The "electrode thickness-laser cutting-variable diameter winding" algorithm model consists of two stages: the first stage controls the "electrode thickness-variable diameter winding," and the second stage controls the "electrode thickness-laser cutting." The algorithm model of this invention is adjusted by first controlling the first stage and then by controlling the second stage.

[0104] When ΔH < Hp, adjust according to the first stage control scheme. Let the minimum thickness adjustment threshold be H1 and the adjustment amount be r. Then the adjusted variable diameter needle radius is: R1 = R + (ΔH - H1) × r.

[0105] When ΔH≥Hp, it indicates that the first-stage "electrode thickness-variable diameter winding needle" control strategy for adjusting the radius of the variable diameter winding needle is no longer sufficient to adjust the electrode position to within the process standard position. The second-stage "electrode thickness-laser cutting" control scheme needs to be used for adjustment. Let the minimum thickness adjustment threshold be H2, and the adjustment amount be s. The adjusted laser-cut electrode spacing is: S=Sn+(ΔH-H2)×s, where Sn is the value of S1, S2, S3...S29. It should be noted that the electrode spacing is achieved by adjusting the laser cutting position L.

[0106] Each measurement point is adjusted using either a first-stage or second-stage control scheme based on the electrode thickness measurement.

[0107] It should be noted that in the above "electrode thickness-laser cutting-variable diameter winding" algorithm model, the parameters minimum thickness adjustment threshold 1 H1, minimum thickness adjustment threshold 2 H2, adjustment amount r, and adjustment amount s are obtained as follows:

[0108] Data sets of electrode thickness, laser cutting position, and roll inner diameter were obtained based on the core electrode control system.

[0109] The acquired dataset was used to learn the correspondence between electrode thickness and laser cutting position and roll inner diameter, and the minimum thickness adjustment threshold H1, minimum thickness adjustment threshold H2, adjustment amount r and adjustment amount s were obtained.

[0110] Variable diameter coiling needles, such as Figure 6 As shown, the radius of the variable diameter winding needle is changed by the extension and retraction of the variable diameter adjustment component 109; the change in radius causes the outer winding needle housing 110 to change, thereby controlling the winding process of the winding core.

[0111] It should be noted that the electrode measurement point in this invention can be adjusted according to the changes in electrode width, electrode flow speed and single electrode length. After the measurement point is adjusted, the thickness laser sensor moving module 104 drives the thickness laser sensor 102 to the designated position to perform electrode thickness measurement.

[0112] It should be noted that in this invention, the parsed values ​​are sent to the programmable controller of the winding device via the Modbus TCP protocol, but the method of data transmission is not limited to this protocol.

[0113] It should be noted that the present invention uses a D-element register to store data, but it is not limited to this. It can also use an array, a custom string or other forms to store the laser cutting adjustment value and the variable diameter coiling needle adjustment value data sent by the host computer.

[0114] Furthermore, this invention sets upper and lower limits for electrode thickness and adds an alarm function for electrode thickness exceeding the limit. When too many alarms are triggered for the same roll of electrode thickness exceeding the limit, it indicates that the current roll of electrode thickness is seriously abnormal. The added alarm function reminds production line equipment personnel to intervene and handle the issue, making the production line run more smoothly and improving production line operating efficiency.

[0115] Furthermore, the alarm output signal controls the alarm light to sound an alarm, but it is not limited to the alarm light sounding alarm mode. It can also be the alarm light flashing red, constantly on, or a combination of red light and buzzer sound to sound an alarm.

[0116] The embodiments described above are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A core tab control system, characterized by, The application relates to a laser cutting and diameter-changing roller needle adjusting device for a laser cutting and diameter-changing roller needle device. The device comprises a moving module, a computing module and a laser sensor. The moving module is used for driving the laser sensor to move and measure the thickness data of measuring points at different positions of a pole piece, and is used for driving the laser to perform a pole lug cutting action. The computing module is used for calculating laser cutting and diameter-changing roller needle adjusting values based on the thickness data of the measuring points and sending the adjusting values to a laser cutting and diameter-changing roller needle control mechanism. The computing module is configured with a "pole piece thickness-laser cutting-diameter-changing roller needle" algorithm model. The computing module calculates the laser cutting and diameter-changing roller needle adjusting values based on the thickness data of the measuring points, and the calculation process comprises the following steps. The pole piece thickness is calculated based on the thickness data of the measuring points. The pole piece thickness is input into the "pole piece thickness-laser cutting-diameter-changing roller needle" algorithm model to obtain the laser cutting and diameter-changing roller needle adjusting values. The data processing process of the "pole piece thickness-laser cutting-diameter-changing roller needle" algorithm model is as follows. The absolute value of the pole piece thickness difference at the measuring points is calculated based on the pole piece thickness at the measuring points and a standard pole piece thickness. If the absolute value of the thickness difference is less than a set thickness difference standard value, the diameter-changing roller needle radius is adjusted as follows: R1=R+ (DeltaH-H1) * r; Wherein, R1 is the adjusted diameter-changing roller needle radius, R is the diameter-changing roller needle radius corresponding to the standard pole piece thickness, r is the adjustment amount, H1 is the minimum thickness adjustment threshold one, DeltaH is the absolute value of the thickness difference, DeltaH=|H0-H|, H0 is the pole piece thickness at the measuring points, and H is the standard pole piece thickness. If the absolute value of the thickness difference is greater than or equal to the set thickness difference standard value, the laser cutting lug spacing is adjusted as follows: S=Sn+ (DeltaH-H2) * s; Wherein, S is the adjusted laser cutting lug spacing, Sn is the laser cutting lug spacing corresponding to the standard condition, s is the adjustment amount, and H2 is the minimum thickness adjustment threshold two.

2. The core tab control system of claim 1, wherein, The adjustment of the laser cutting lug spacing is converted into the adjustment of the laser cutting position.

3. The core tab control system of claim 2, wherein, The computing module is configured in an upper computer, and the laser sensor is in communication connection with the upper computer. The moving module comprises a thickness laser sensor moving module and a laser cutting moving module. The thickness laser sensor moving module is used for driving the thickness laser sensor to move left and right, measuring the thickness data of measuring points at different positions of a pole piece, and transmitting the data to the upper computer.

4. The core tab control system of claim 3, wherein, The laser cutting moving module is used for driving the laser to move up and down to perform a pole lug cutting action. The thickness laser sensor and the thickness laser sensor moving module are provided in two groups and are located on the upper and lower sides of a pole piece transmitted by a roller. The thickness laser sensor moving module is arranged in parallel with the pole piece and covers the whole width of the pole piece. The thickness laser sensor is installed on the thickness laser sensor moving module through a fixed support, and the fixed support can move left and right along the thickness laser sensor moving module.

5. The core tab control system of claim 3, wherein, The distance between the thickness laser sensor and the pole piece meets the sensor measuring distance.

6. The core tab control system of claim 3, wherein, The measuring points are arranged according to the pole piece width, the pole piece flow speed and the length of a single pole piece. The laser cutting moving module is located above the pole piece and is arranged in parallel with the pole piece. The laser is installed on the laser cutting mobile module through a fixed connection module, the fixed connection module can move up and down on the laser cutting mobile module, and the laser is used to move to a suitable position and then perform tab cutting.

7. The core tab control system of claim 3, wherein, The computing module calculates the tab thickness based on the thickness data of the measurement points, and specifically: The distance between the thickness measurement laser sensors located on the upper and lower sides of the tab is H, the distance from the thickness measurement laser sensor located on the upper side of the tab to the tab is S1, the distance from the thickness measurement laser sensor located on the lower side of the tab to the tab is S2, and the tab thickness is H-S1-S2.

8. The control method of the core tab control system according to any one of claims 1 to 7, characterized by, It comprises: Based on the thickness measurement laser sensor, the thickness data of the measurement points at different positions of the tab is obtained; Based on the thickness data of the measurement points, the tab thickness at the measurement points is calculated; Based on the tab thickness, the laser cutting adjustment value and the variable-diameter winding needle adjustment value are calculated and sent to the laser cutting and variable-diameter winding needle control mechanism.

9. The control method of the jelly-roll tab control system according to claim 8, characterized by, The laser cutting adjustment value and the variable-diameter winding needle adjustment value are calculated based on the tab thickness, which comprises: Based on the deep learning algorithm, the "tab thickness-laser cutting-variable-diameter winding needle" algorithm model is trained; The tab thickness is input into the "tab thickness-laser cutting-variable-diameter winding needle" algorithm model to obtain the laser cutting adjustment value and the variable-diameter winding needle adjustment value; the laser cutting adjustment value is the laser cutting position, and the variable-diameter winding needle adjustment value is the inner diameter of the winding drum; The data processing process of the "tab thickness-laser cutting-variable-diameter winding needle" algorithm model is as follows: According to the tab thickness at the measurement point and the tab standard thickness, the absolute value of the tab thickness difference at the measurement point is calculated; If the absolute value of the thickness difference is less than the set thickness difference standard value, the variable-diameter winding needle radius is adjusted as follows: R1=R+(ΔH-H1)×r; Wherein, R1 is the adjusted variable-diameter winding needle radius, R is the variable-diameter winding needle radius corresponding to the tab standard thickness, r is the adjustment amount, H1 is the minimum thickness adjustment threshold one, ΔH is the absolute value of the thickness difference, ΔH=│H0-H│, H0 is the tab thickness at the measurement point, and H is the tab standard thickness; If the absolute value of the thickness difference is greater than or equal to the set thickness difference standard value, the laser cutting tab spacing is adjusted as follows: S=Sn+(ΔH-H2)×s; Wherein, S is the adjusted laser cutting tab spacing, Sn is the corresponding laser cutting tab spacing under standard conditions, s is the adjustment amount, and H2 is the minimum thickness adjustment threshold two; The adjustment of the laser cutting tab spacing is converted into the adjustment of the laser cutting position.

10. The control method of the core tab control system according to claim 9, wherein The minimum thickness adjustment threshold one H1, the minimum thickness adjustment threshold two H2, the adjustment amount r and the adjustment amount s are trained based on the deep learning algorithm, and the training method is as follows: Based on the winding core tab control system, the tab thickness, laser cutting position and winding drum inner diameter data set are obtained; The deep learning algorithm is used to learn the corresponding relationship between the tab thickness and the laser cutting position and the winding drum inner diameter based on the obtained data set, and the minimum thickness adjustment threshold one H1, the minimum thickness adjustment threshold two H2, the adjustment amount r and the adjustment amount s are obtained.

11. The control method of the jelly-roll tab control system according to claim 9, characterized by, The laser cutting and variable-diameter winding needle control mechanism uses a winding equipment programmable controller. The host computer sends the calculated laser cutting value and the variable diameter winding needle adjustment value to the winding device programmable controller through the Modbus TCP protocol.

12. The control method of the jelly-roll tab control system according to claim 11, wherein The winding device programmable controller reserves a D element register to store the laser cutting position and the inner diameter of the winding drum.

13. The control method of the jelly-roll tab control system according to claim 12, characterized by, After the logical action is completed, the current D element register data is cleared, the winding device programmable controller feeds back the winding core completion result to the host computer, and optimizes the "polar piece thickness-laser cutting-variable diameter winding needle" algorithm model according to the feedback result.

14. The control method of the jelly-roll tab control system according to claim 11, wherein The method further comprises: setting the upper and lower limit values of the polar piece thickness and setting the threshold value of the number of times of exceeding the polar piece thickness, when the calculated polar piece thickness exceeds the upper and lower limit values of the polar piece thickness, an alarm is given, and when the number of times of exceeding the polar piece thickness exceeds the threshold value, an alarm is given.

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