Deviation correction method and device for pole piece feeding, computer equipment and storage medium

Abstract

The invention provides a deviation rectifying method and device for pole piece feeding, computer equipment and a storage medium. The deviation rectifying method for pole piece feeding comprises the following steps: acquiring an actual pole piece exceeding value of a pole piece of a battery cell relative to the edge of a diaphragm at the side edge after a first circle of a winding head through a measuring module; carrying out difference processing on the actual pole piece exceeding value and the target pole piece exceeding value to obtain a pole piece exceeding difference value; calculating a pole piece compensation value according to the pole piece exceeding difference value; and correcting the deviation according to the pole piece compensation value, so that the pole piece is adjusted from the first feeding angle to the second feeding angle. According to the deviation rectifying method for pole piece feeding, firstly, the actual pole piece exceeding value of the side edge, relative to the diaphragm edge, of the pole piece of the battery cell after the first circle of the winding head is obtained through the measuring module; the problems that manual observation and adjustment are low in efficiency and poor in adjustability of the pole piece feeding angle are solved, the pole piece feeding angle is accurately adjusted, and meanwhile closed-loop control over adjustment of the pole piece feeding angle is achieved.

Description

Technical Field

[0001] This disclosure relates to the technical field of electrode winding processing, and in particular to a method, apparatus, computer equipment, and storage medium for correcting electrode feeding. Background Technology

[0002] The electrode feeding and insertion process is a key step in the winding process, which involves feeding in the electrode (i.e., positive or negative electrode) so that the electrode and separator can be wound together with the winding needle. The precision of the electrode feeding in the insertion process has a significant impact on the cell quality. If the edge of the electrode is too small or even extends beyond the edge of the separator during winding, lithium plating is likely to occur in the subsequent cells, thus affecting the battery's yield.

[0003] However, the existing winding and feeding insertion mechanism relies on manual observation and adjustment, which has the problem of poor adjustability of the electrode feeding angle, such as adjustment accuracy, resulting in a high defect rate of electrode feeding. Summary of the Invention

[0004] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide a method, apparatus, computer equipment, and storage medium for correcting electrode feeding to effectively improve the electrode feeding yield.

[0005] The purpose of this disclosure is achieved through the following technical solution: A method for correcting electrode feeding includes: The actual overshoot of the electrode on the side of the cell relative to the edge of the separator after the first turn of the winding head is obtained by the measurement module. The difference between the actual excess value and the target excess value of the electrode is calculated to obtain the electrode excess difference value. The electrode compensation value is calculated based on the electrode excess value. The electrode is adjusted from the first feeding angle to the second feeding angle based on the electrode compensation value.

[0006] In one embodiment, the step of obtaining the actual excess value of the electrode sheet on the side of the cell relative to the edge of the separator after the first turn of the winding head by the measurement module is as follows: The actual excess value of the electrode plates of the battery cell relative to the edge of the separator is obtained by the measurement module after the first turn of the winding head. The step of subtracting the actual excess value of the electrode from the target excess value of the electrode to obtain the electrode excess difference value includes: The actual excess value of each electrode is subtracted from the target excess value of the electrode to obtain multiple actual excess difference values ​​of the electrode. The average value of the multiple electrode actual deviations is used to obtain the electrode excess deviation value.

[0007] In one embodiment, the step of calculating the electrode compensation value based on the electrode excess value is as follows: The electrode compensation value is obtained by multiplying the electrode excess value by the electrode compensation coefficient.

[0008] In one embodiment, the electrode compensation coefficient is 0.3 to 0.5.

[0009] In one embodiment, before the step of adjusting the electrode from the first feeding angle to the second feeding angle based on the electrode compensation value, the correction method further includes: Determine whether the electrode compensation value is within the threshold range; if so, do not perform the step of adjusting the electrode from the first feeding angle to the second feeding angle based on the electrode compensation value.

[0010] In one embodiment, the threshold range is 0.2 mm to 0.8 mm.

[0011] In one embodiment, the measurement module is a CCD camera module.

[0012] An electrode feeding correction device, wherein the electrode feeding correction device employs the electrode feeding correction method as described in any of the above embodiments, comprising: The measurement module is used to obtain the actual excess value of the electrode sheet on the side of the cell relative to the edge of the separator after the first turn of the winding head; The difference processing module is used to subtract the actual excess value of the electrode from the target excess value of the electrode to obtain the excess value of the electrode. The compensation calculation module is used to calculate the electrode compensation value based on the electrode excess value. The electrode correction module is used to perform correction actions according to the electrode compensation value, so that the electrode is adjusted from the first feeding angle to the second feeding angle.

[0013] A computer device includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the steps of the method described in any of the above embodiments.

[0014] A computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the method described in any of the above embodiments.

[0015] Compared with the prior art, this disclosure has at least the following advantages: The above-mentioned electrode feeding correction method first obtains the actual overshoot value of the electrode relative to the edge of the separator after the first turn of the winding head using a measurement module; then, the difference between the actual overshoot value and the target overshoot value is calculated to obtain the electrode overshoot difference value; then, the electrode compensation value is calculated based on the electrode overshoot difference value; finally, the correction action is performed based on the electrode compensation value to adjust the electrode from the first feeding angle to the second feeding angle. This avoids the problems of low efficiency and poor adjustability of manual observation and adjustment, thus enabling precise adjustment of the electrode feeding angle and achieving closed-loop control of the electrode feeding angle adjustment. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this disclosure 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.

[0017] Figure 1 This is a flowchart of an embodiment of an electrode feeding correction method; Figure 2 This is a schematic diagram of the cell winding process using an electrode winding machine according to one embodiment; Figure 2a for Figure 2 A partial schematic diagram of the electrode winding machine shown; Figure 3 To adopt Figure 1 The diagram shows the output of the image of the actual excess value of the positive and negative electrode sheets obtained by step S101 of the electrode feeding correction method. Figure 4 for Figure 2 A partial schematic diagram of the electrode winding machine shown from one perspective; Figure 4a for Figure 4 An enlarged schematic diagram of point A on the electrode winding machine shown; Figure 5 for Figure 4 A partial schematic diagram of the electrode winding machine from another perspective; Figure 6 for Figure 4 A partial schematic diagram of the electrode winding machine from another perspective; Figure 7 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0018] To facilitate understanding of this disclosure, a more complete description will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the present disclosure. However, this disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure.

[0019] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] This disclosure relates to a method for correcting electrode feeding. In one embodiment, the method includes: obtaining, through a measurement module, the actual overshoot value of the electrode relative to the edge of the separator after the first turn of the winding head; subtracting the actual overshoot value from the target overshoot value to obtain an overshoot difference value; calculating an electrode compensation value based on the overshoot difference value; and performing a correction action based on the electrode compensation value to adjust the electrode from a first feeding angle to a second feeding angle. The above-mentioned electrode feeding correction method first obtains the actual overshoot value of the electrode relative to the edge of the separator after the first turn of the winding head using a measurement module; then, the difference between the actual overshoot value and the target overshoot value is calculated to obtain the electrode overshoot difference value; then, the electrode compensation value is calculated based on the electrode overshoot difference value; finally, the correction action is performed based on the electrode compensation value to adjust the electrode from the first feeding angle to the second feeding angle. This avoids the problems of low efficiency and poor adjustability of manual observation and adjustment, thus enabling precise adjustment of the electrode feeding angle and achieving closed-loop control of the electrode feeding angle adjustment.

[0022] Please see Figure 1This is a flowchart of an electrode feeding correction method according to an embodiment of the present disclosure. The electrode feeding correction method is used to adjust the electrode insertion after the electrode is fed and before the electrode insertion inlet, improving the accuracy of electrode insertion into the winding needle and separator winding, and reducing lithium plating in the battery. It should be noted that the electrode can be a positive or negative electrode, and the electrode feeding correction method can be applied to both positive and negative electrode feeding methods. See also... Figure 2 and Figure 2a The positive electrode 40, the separator 50, and the negative electrode 60 are wound along the winding needle 70, wherein the positive electrode 40 is inserted into the winding needle 70 along direction a and wound, the separator 50 is inserted into the winding needle 70 along direction b and wound, and the negative electrode 60 is inserted into the winding needle 70 along direction c and wound.

[0023] In one embodiment, the electrode feeding correction method includes some or all of the following steps: S101, the measurement module obtains the actual excess value of the electrode sheet on the side of the cell relative to the edge of the separator after the first turn of the winding head.

[0024] In this embodiment, the measurement module 80 obtains the actual excess value of the electrode sheet on the side relative to the edge of the separator after the first turn of the winding head. That is, the measurement module obtains the actual excess value of the electrode sheet on the side relative to the edge of the separator after the first turn of the winding needle. In other words, the measurement module measures the actual excess value of the electrode sheet on the side relative to the edge of the separator after the first turn of the winding head. After the electrode sheet is wound for the first time, the measurement module measures the actual excess value of the electrode sheet on the side relative to the edge of the separator so as to correct the deviation in time and prevent the actual excess value of the electrode sheet on the side relative to the edge of the separator after the first turn of the winding head from being too large, which would affect the subsequent winding quality of the entire battery cell.

[0025] It is understandable that the higher the alignment accuracy between the electrode and the separator when the cell electrode is inserted into the winding needle, the smaller the actual deviation of the electrode; conversely, the larger the actual deviation of the electrode. It should be noted that the electrode can be either a positive or negative electrode, meaning that both positive and negative electrodes require correction during winding, and the electrode feeding correction method of this embodiment can be used for both positive and negative electrodes. Figure 3 The figures show the distance m of the positive electrode sheet relative to the edge of the separator after the first turn of the winding head, obtained by the measurement module, and the distance n of the negative electrode sheet relative to the edge of the separator after the first turn of the winding head.

[0026] S103, the difference between the actual excess value of the electrode and the target excess value of the electrode is calculated to obtain the excess value of the electrode.

[0027] In this embodiment, the difference between the actual excess value and the target excess value of the electrode is calculated. This difference is used to obtain the electrode excess difference value, which facilitates the subsequent calculation of the electrode compensation value.

[0028] S105, the electrode compensation value is calculated based on the electrode excess value.

[0029] In this embodiment, the electrode compensation value is calculated based on the electrode excess difference. In one embodiment, the step of calculating the electrode compensation value based on the electrode excess difference specifically involves multiplying the electrode excess difference by the electrode compensation coefficient, that is, multiplying the electrode excess difference by the electrode compensation coefficient to obtain the electrode compensation value.

[0030] In one embodiment, the electrode compensation coefficient is 0.3~0.5, ensuring that the electrode compensation adequately meets the compensation requirements of the actual winding and assembly of the battery cell. In this embodiment, the battery cell is a pouch lithium-ion battery cell. It should be noted that the electrode compensation coefficient setting value varies for different battery cell models.

[0031] S107, perform a correction action according to the electrode compensation value to adjust the electrode from the first feeding angle to the second feeding angle.

[0032] In this embodiment, a correction action is performed based on the electrode compensation value, adjusting the electrode from the first feeding angle to the second feeding angle. This causes the electrode feeding to deflect relative to the diaphragm, effectively adjusting the position of the electrode side relative to the diaphragm edge after the first turn of the winding head. This effectively corrects the electrode side relative to the diaphragm edge, achieving automatic correction adjustment of the electrode feeding. Compared to manual correction, this not only reduces the intensity of manual labor but also improves the adjustability of the electrode feeding angle.

[0033] Furthermore, the step of adjusting the electrode from the first feeding angle to the second feeding angle based on the electrode compensation value is as follows: the swing mechanism 10 is controlled to perform the correction action based on the electrode compensation value, so that the electrode feeding clamping mechanism 300 is adjusted from the first feeding angle to the second feeding angle. This adjusts the electrode from the first feeding angle to the second feeding angle, thereby causing the side of the electrode to swing relative to the diaphragm to a more precise feeding angle after the first turn of the winding head, effectively correcting the side of the electrode relative to the edge of the diaphragm.

[0034] See also Figure 2 , Figures 4 to 5In one embodiment, the swing mechanism 10 includes a swing frame 100, a swing drive assembly 200, and an electrode feeding clamping mechanism 300. The swing frame 100 is rotatably mounted on the frame 20. The swing drive assembly 200 is mounted on the frame 20, and the power output end of the swing drive assembly 200 is connected to the swing frame 100, so that the swing drive assembly 200 drives the swing frame 100 to swing relative to the frame 20 according to the control command. The control command can be a command based on the swing angle and swing direction of the current position of the swing frame 100, which is converted from the electrode compensation value, so that the swing frame 100 rotates relative to the frame 20 from a first feeding angle to a second feeding angle. The electrode feeding clamping mechanism 300 is mounted on the swing frame 100. The electrode feeding clamping mechanism 300 is used to clamp and transport the electrode to the electrode insertion inlet, so that the electrode winding mechanism 90 can feed the electrode from the electrode insertion inlet into the winding needle and diaphragm 80 for winding. It should be noted that the method of calculating the swing angle and swing direction based on the current position of the swing frame 100 from the electrode compensation value is existing technology and will not be elaborated here. The control terminal of the swing drive assembly 200 is electrically connected to the measurement module. When adjusting the swing frame 100 to rotate relative to the frame 20 from the first feeding angle to the second feeding angle, the electrode feeding clamping mechanism 300 can be controlled to clamp the electrode first, and then the electrode can be transported to the electrode insertion inlet.

[0035] The above-mentioned electrode feeding correction method first obtains the actual overshoot value of the electrode relative to the edge of the separator after the first turn of the winding head using a measurement module; then, the difference between the actual overshoot value and the target overshoot value is calculated to obtain the electrode overshoot difference value; then, the electrode compensation value is calculated based on the electrode overshoot difference value; finally, the correction action is performed based on the electrode compensation value to adjust the electrode from the first feeding angle to the second feeding angle. This avoids the problems of low efficiency and poor adjustability of manual observation and adjustment, thus enabling precise adjustment of the electrode feeding angle and achieving closed-loop control of the electrode feeding angle adjustment.

[0036] See also Figures 4 to 6Furthermore, the power output end of the swing drive assembly 200 is pivotally connected to the swing frame 100 to drive the swing frame 100 to rotate relative to the frame 20, causing the swing frame 100 to rotate relative to the frame 20 from a first feeding angle to a second feeding angle. In this embodiment, the swing drive assembly 200 includes a first motor 210, a reducer 220, a first lead screw 230, and a first nut slide 240. The first motor 210 and the reducer 220 are both mounted on the frame 20, and the control end of the first motor 210 is electrically connected to the measurement module. The power input shaft of the reducer 220 is connected to the power output end of the first motor 210, and the power output shaft of the reducer 220 is connected to the first lead screw 230. The first lead screw 230 is rotatably connected to the frame 20, so that the first motor 210 drives the first lead screw 230 to rotate relative to the frame 20 through the reducer 220. The first nut slide 240 has a first threaded hole, and the first lead screw 230 passes through the first threaded hole and is screwed to the first nut slide 240. The first nut slide 240 is slidably connected to the frame 20. When the first lead screw 230 is relative to the first nut slide 240... When the 40 rotates, the first nut slide 240 slides relative to the frame 20; the first nut slide 240 is rotatably connected to the swing frame 100, and the center line B of the swing frame 100 rotatably connected to the first nut slide 240 is parallel to and not collinear with the center line C of the swing frame 100 rotatably connected to the frame. When the first nut slide 240 slides relative to the frame 20, the first nut slide 240 rotates relative to the swing frame 100 and drives the swing frame 100 to rotate relative to the frame 20, so that the swing frame 100 rotates relative to the frame 20 from the first feeding angle to the second feeding angle.

[0037] See also Figures 4 to 6 Furthermore, the swing frame 100 includes a swing plate 110, a connecting member 120, and a feeding support plate 130; the swing plate 110 is rotatably connected to the frame 20 and the first nut slide 240, respectively, and the feeding support plate 130 is fixedly connected to the swing plate 110 through the connecting member. The electrode feeding mechanism is mounted on the swing plate 110, and the electrode feeding mechanism is slidably mounted on the feeding support plate 130. For example, the feeding support plate 130 is welded and fixedly connected to the swing plate 110 through the connecting member.

[0038] See also Figures 4 to 6Furthermore, the frame 20 has an installation clearance area 22, through which the connecting member 120 passes. The feeding support plate 130 is located on one side of the frame 20, and the swing plate 110 is rotatably connected to the other side of the frame 20. When the swing plate 110 rotates relative to the frame 20, it drives the feeding support plate 130 to swing relative to the frame through the connecting member 120, thereby realizing the overall swing of the swing frame 100 and making the structure of the swing mechanism 10 mounted on the frame more compact. Furthermore, the frame 20 also has a swing clearance groove 24 communicating with the installation clearance area 22. The feeding support plate 130 is located in the swing clearance groove 24, which prevents the feeding support plate 130 from interfering with the frame during the rotation of the swing plate 110 through the connecting member, and also makes the structure of the swing mechanism 10 mounted on the frame more compact. In this embodiment, the frame 20 includes a frame body 20a and an upright plate 20b. The upright plate 20b is vertically connected to the frame body 20a, and the swing plate 110 is rotatably connected to the frame body 20a. There is a distance between the upright plate 20b and the position where the swing plate 110 is rotatably connected to the frame body 20a. The installation clearance area 22 and the swing clearance groove 24 are both opened in the frame body 20a.

[0039] See also Figures 4 to 6 Furthermore, the swing plate 110 is hinged to the frame 20, so that the swing plate 110 and the frame 20 are rotatably connected.

[0040] See also Figures 4 to 6 Furthermore, the distance between the center line B of the swing frame 100 rotatably connected to the first nut slide 240 and the center line C of the swing frame 100 rotatably connected to the frame 20 is equal to 0.6 to 0.8 times the length of the swing frame 100. This allows the first nut slide 240 to better drive the swing frame 100 to rotate relative to the frame 20 when rotating relative to the swing frame 100, thus increasing the driving torque of the swing frame 100 relative to the frame 20. In this embodiment, the distance between the center line of the swing plate 110 rotatably connected to the first nut slide 240 and the center line of the swing plate 110 rotatably connected to the frame is equal to 0.6 to 0.8 times the length of the swing plate 110.

[0041] See also Figures 4 to 6 Furthermore, the swing drive assembly 200 also includes a distance sensor 250, which is mounted on the frame. The distance sensor 250 is used to measure the displacement of the swing plate 110 relative to the frame, so that the swing plate 110 rotates with high accuracy relative to the frame, thereby enabling the swing frame 100 to reliably rotate from the first feed angle to the second feed angle relative to the frame 20.

[0042] See also Figures 4 to 6Furthermore, the electrode feeding and clamping mechanism 300 includes a second motor 310, a second lead screw 320, a second nut slide 330, a clamping cylinder 340, and a clamping plate (not shown in the figure). The second motor 310 is mounted on the swing frame 100, and the first end of the second lead screw 320 is connected to the power output shaft of the second motor 310. The second nut slide 330 is slidably disposed on the swing frame 100, and the second nut slide 330 has a second threaded hole. The second lead screw 320 passes through the second threaded hole and is screwed to the second nut slide 330. The second end of the second lead screw 320 is rotatably connected to the swing frame 100. The clamping cylinder 340 is disposed on the second nut slide 330, and the clamping plate is fixed to the power output end of the clamping cylinder 340, and the clamping plate is arranged parallel to the second nut slide 330. The clamping cylinder 340 is used to clamp or release the electrode sheet 30. When the electrode sheet is fed into the feed, the clamping cylinder 340 drives the clamping plate to clamp the electrode sheet onto the second nut slide 330. The second motor 310 drives the lead screw to rotate in the forward direction, so as to transport the second nut slide 330 from the initial position to the electrode sheet insertion inlet. When the second nut slide 330 is transported to the electrode sheet insertion inlet, the electrode sheet feeding mechanism absorbs and clamps the head of the electrode sheet exposed in the electrode sheet feeding mechanism 300. The cylinder releases the electrode sheet, and the second motor 310 drives the lead screw to rotate in the reverse direction, so as to transport the second nut slide 330 from the electrode sheet insertion inlet to the initial position, so that the clamping cylinder 340 and the clamping plate move to the initial position with the second nut slide 330, so as to perform the next electrode sheet clamping and transport operation. In this embodiment, the second motor 310 is mounted and fixed to the swing plate 110, the second end of the second lead screw 320 is rotatably connected to the swing plate 110, and the second nut slide block 330 is slidably disposed on the feeding support plate 130. In this embodiment, the control terminal of the second motor 310 is electrically connected to the measurement module.

[0043] See also Figures 4 to 6 Furthermore, the second nut slide 330 passes through the installation clearance area 22, making the structure of the swing mechanism 10 mounted on the frame more compact.

[0044] It should be noted that the electrode feeding mechanism is existing technology and will not be discussed in detail here.

[0045] In one embodiment, step S101, which uses a measurement module to obtain the actual excess value of the electrode sheet on the side of the cell relative to the edge of the separator after the first turn of the winding head, specifically involves: The measurement module obtains the actual overshoot values ​​of multiple electrode plates relative to the separator edge after the first turn of the winding head for each battery cell. Specifically, the measurement module measures the actual overshoot values ​​of the electrode plates relative to the separator edge after the first turn of the winding head for multiple battery cells, obtaining multiple corresponding actual overshoot values. It should be noted that the actual overshoot values ​​of the electrode plates relative to the separator edge after the first turn of the winding head are inconsistent for different battery cells, and are measured separately using the measurement module.

[0046] Further, step S103, which involves subtracting the actual excess value of the electrode from the target excess value of the electrode to obtain the electrode excess difference value, includes: S103a, the difference between the actual excess value and the target excess value of the electrode is calculated to obtain a plurality of electrode actual excess values. That is, the difference between the actual excess value and the target excess value of each electrode is calculated to obtain the corresponding electrode actual excess value. In this way, the difference between the actual excess value and the target excess value of the electrode is calculated to obtain a plurality of electrode actual excess values. S103b, average the multiple actual deviation values ​​of the electrode sheets, that is, calculate the average value of the multiple actual deviation values ​​of the electrode sheets to obtain the deviation value of the electrode sheets.

[0047] In one embodiment, the measurement module is a CCD camera module, enabling the measurement module to obtain measurement data of the actual excess value of the electrode sheet relative to the edge of the separator after the first turn of the winding head, while ensuring high measurement accuracy of the actual excess value. In this embodiment, the step of obtaining the actual excess value of the electrode sheet relative to the edge of the separator after the first turn of the winding head by the measurement module includes: firstly, obtaining initial image data of the electrode sheet after the first turn of the winding head by the measurement module; then processing the initial image data to obtain optimized image data; then calculating the optimized image data to obtain and display the actual excess value of the electrode sheet relative to the edge of the separator after the first turn of the winding head, making the measured actual excess value of the electrode sheet more accurate and intuitively displayed for user observation, thus improving ease of use. It should be noted that the initial image data processing method includes, but is not limited to, stitching, fitting, and grayscale processing of the initial image data. In one embodiment, the initial image data processing method can use existing image processing methods to process the initial image data.

[0048] In one embodiment, before step S107, which involves adjusting the electrode from the first feeding angle to the second feeding angle based on the electrode compensation value, the correction method further includes: S106, determine whether the electrode compensation value is within the threshold range, that is, determine whether the electrode compensation value is within the threshold range where no correction is required, that is, determine whether the electrode compensation value is within the numerical range where no correction is required; if so, that is, the electrode compensation value is within the threshold range, then step S107 of performing correction action based on the electrode compensation value is not executed, and no correction action is required at this time, so that the electrode is adjusted from the first feeding angle to the second feeding angle.

[0049] In one embodiment, the threshold range is 0.2mm to 0.8mm, where the upper limit of the correction is 0.2mm and the lower limit is 0.8mm. Further, when the electrode compensation value is greater than 0.8mm and reaches the scrap threshold (1mm), the electrode compensation value is discarded without correction, and the cell is directly scrapped.

[0050] Furthermore, after the step of performing the correction action based on the electrode compensation value, the correction method further includes: firstly, sensing the electrode transport deviation value at the electrode insertion inlet using a correction sensor; then determining whether the electrode transport deviation value is less than or equal to a preset value; if not, controlling the electrode loosening clamp of the electrode feeding mechanism to clamp the electrode at the electrode insertion inlet and move it laterally for correction, while simultaneously releasing the electrode and retracting the electrode feeding clamp; conversely, controlling the electrode loosening clamp of the electrode feeding mechanism to... The clamping jaws tighten the electrode at the electrode insert inlet, while the electrode feeding mechanism releases the electrode and retracts. This further improves the accuracy of the electrode feeding into the winding needle and the separator for winding. After the step of correcting the deviation based on the electrode compensation value, the deviation correction sensor further clamps and corrects the deviation as the electrode is transported to the electrode insert inlet. Thus, the electrode and separator undergo at least two deviation correction operations during winding, improving the winding accuracy of the electrode and further reducing lithium plating in the cell. In this embodiment, the electrode loosening jaws of the electrode feeding mechanism are existing technology and will not be described in detail here.

[0051] Furthermore, before calculating the electrode compensation value based on the electrode excess value, the electrode feeding correction method also includes: establishing an electrode compensation coefficient table that corresponds one-to-one with multiple cell models and multiple electrode compensation coefficients, so that users can find the corresponding electrode compensation coefficient in real time according to the current cell model, improving the ease of use of the electrode feeding correction method. In this embodiment, the cell model data includes parameters such as cell diameter and cell height.

[0052] Furthermore, before calculating the electrode compensation value based on the electrode excess value, the electrode feeding correction method also includes: selecting the target cell model based on the current cell size, so that users can find the corresponding target cell model based on the cell size, which further improves the ease of use of the electrode feeding correction method.

[0053] Furthermore, before calculating the electrode compensation value based on the electrode excess value, the electrode feeding correction method also includes updating the electrode compensation coefficient table to improve the applicability and convenience of the electrode feeding correction method.

[0054] This application also provides a correction device for electrode feeding, wherein the correction device adopts the correction method for electrode feeding as described in any of the above embodiments. The correction device includes a measurement module, a difference processing module, a compensation calculation module, and an electrode correction module. The measurement module is used to obtain the actual excess value of the electrode relative to the edge of the separator after the first turn of the electrode at the winding head. The difference processing module is used to subtract the actual excess value from the target excess value to obtain the excess difference value. The compensation calculation module is used to calculate the electrode compensation value based on the excess difference value. The electrode correction module is used to perform correction actions based on the electrode compensation value, adjusting the electrode from a first feeding angle to a second feeding angle.

[0055] The aforementioned electrode feeding correction device first obtains the actual deviation of the electrode from the edge of the separator after the first turn of the winding head using a measurement module. Then, a difference processing module calculates the difference between the actual deviation and the target deviation to obtain the deviation difference. Next, a compensation calculation module calculates the electrode compensation value based on the deviation difference. Finally, an electrode correction module performs a correction action based on the electrode compensation value, adjusting the electrode from the first feeding angle to the second feeding angle. This avoids the problems of low efficiency and poor adjustability of manual observation and adjustment, thus enabling precise adjustment of the electrode feeding angle and achieving closed-loop control of the electrode feeding angle adjustment.

[0056] In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as follows: Figure 7 As shown, the computer device includes a processor, memory, and a network interface connected via a system bus. The processor provides computational and control capabilities. The memory includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores the operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The database stores data such as actual electrode overshoot values, target electrode overshoot values, and electrode compensation values. The network interface is used for communication with external terminals via a network connection. When executed by the processor, the computer program implements a method for correcting electrode feeding.

[0057] Those skilled in the art will understand that Figure 7The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0058] In one embodiment, this application also provides a computer device including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps in the above-described method embodiments.

[0059] In one embodiment, this application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps in the above-described method embodiments.

[0060] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the methods described above. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, or optical storage, etc. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc.

[0061] The embodiments described above are merely illustrative of several implementations of this disclosure, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this disclosure, and these all fall within the protection scope of this disclosure. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A method for correcting the deviation of electrode feed material, characterized in that, include: The actual overshoot of the electrode on the side of the cell relative to the edge of the separator after the first turn of the winding head is obtained by the measurement module. The difference between the actual excess value and the target excess value of the electrode is calculated to obtain the electrode excess difference value. The electrode compensation value is calculated based on the electrode excess value. The electrode is adjusted from the first feeding angle to the second feeding angle based on the electrode compensation value.

2. The electrode feeding correction method according to claim 1, characterized in that, The specific steps for obtaining the actual excess value of the electrode sheet on the side of the battery cell relative to the edge of the separator after the first turn of the winding head using the measurement module are as follows: The actual excess value of the electrode plates of the battery cell relative to the edge of the separator is obtained by the measurement module after the first turn of the winding head. The step of subtracting the actual excess value of the electrode from the target excess value of the electrode to obtain the electrode excess difference value includes: The actual excess value of each electrode is subtracted from the target excess value of the electrode to obtain multiple actual excess difference values ​​of the electrode. The average value of the multiple electrode actual deviations is used to obtain the electrode excess deviation value.

3. The electrode feeding correction method according to claim 1, characterized in that, The specific steps for calculating the electrode compensation value based on the electrode excess value are as follows: The electrode compensation value is obtained by multiplying the electrode excess value by the electrode compensation coefficient.

4. The electrode feeding correction method according to claim 3, characterized in that, The electrode compensation coefficient is 0.3~0.

5.

5. The electrode feeding correction method according to claim 1, characterized in that, Before the step of adjusting the electrode from the first feeding angle to the second feeding angle based on the electrode compensation value, the correction method further includes: Determine whether the electrode compensation value is within the threshold range; if so, do not perform the step of adjusting the electrode from the first feeding angle to the second feeding angle based on the electrode compensation value.

6. The electrode feeding correction method according to claim 5, characterized in that, The threshold range is 0.2mm to 0.8mm.

7. The electrode feeding correction method according to claim 1, characterized in that, The measurement module is a CCD camera module.

8. A device for correcting the deviation of electrode feed material, characterized in that, The electrode feeding correction device adopts the electrode feeding correction method as described in any one of claims 1 to 7, and the correction device includes: The measurement module is used to obtain the actual excess value of the electrode sheet on the side of the cell relative to the edge of the separator after the first turn of the winding head; The difference processing module is used to subtract the actual excess value of the electrode from the target excess value of the electrode to obtain the excess value of the electrode. The compensation calculation module is used to calculate the electrode compensation value based on the electrode excess value. The electrode correction module is used to perform correction actions according to the electrode compensation value, so that the electrode is adjusted from the first feeding angle to the second feeding angle.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 7.

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