Sheet size control method based on closed-loop deviation correction and die-cutting machine

Abstract

The invention discloses a pole piece size control method based on closed-loop deviation correction and a die-cutting machine. The method comprises the following steps that initial position information of a pole piece template is determined; obtaining predicted position information of each target pole piece; determining whether to adjust the pole piece template or not according to the deviation condition of the initial position information and the predicted position information; if not, the sheet feeding length is adjusted according to the deviation condition of the second number; if yes, the initial position information of the pole piece template is adjusted according to the next to-be-cut target pole piece in the material belt, the piece feeding length is adjusted according to the deviation condition between the adjusted initial position information and the predicted position information of the first number, and the second number is larger than the first number. Under normal compensation, closed-loop fine adjustment is carried out through the predicted position information of the second quantity, when the deviation is large, the pole piece template is updated in time, the predicted position information of the first quantity smaller than the predicted position information of the normal compensation is used for closed-loop fine adjustment, and therefore the effect that the pole piece with the normal size is rapidly corrected back to the pole piece with the normal size is achieved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of battery manufacturing, and in particular to a sheet manufacturing size control method based on closed-loop deviation correction and a die-cutting machine. BACKGROUND

[0002] The laminating machine is used for cutting the coated substrate into single electrode sheets required by the battery cell. During sheet manufacturing, the roll material is installed on the unwinding mechanism by an automatic feeding vehicle or a lifting device. The unwinding mechanism releases the roll material smoothly under the drive of a servo motor. An automatic deviation correction device is installed during the material travel. It detects the edge position of the material in real time through an edge sensor or a line array CCD camera. Once the lateral deviation of the material is detected, the control system will immediately instruct the deviation correction mechanism to make fine adjustments to guide the material back to the preset reference path, which ensures the high accuracy of the cutting position.

[0003] It is found in the manufacturing process that the proportion of poor tab edge margin is high, which affects the overall machine rate. The reason is that when at least one of the following situations occurs: skip cutting, incoming material tab folding and tab state abnormality, the existing algorithm and compensation method cannot correct in time, and it needs to be compensated back after several tens of sheets in actual production. SUMMARY

[0004] The application provides a sheet manufacturing size control method based on closed-loop deviation correction, which effectively solves the technical problem of abnormal sheet arrangement that cannot be corrected in time in the related art.

[0005] The first aspect embodiment of the application provides a sheet manufacturing size control method based on closed-loop deviation correction, including the following steps:

[0006] Determine the initial position information of the tab template;

[0007] Detect each tab of the material belt to obtain the predicted position information of each target tab;

[0008] According to the deviation between the initial position information and the predicted position information, determine whether the tab template needs to be adjusted;

[0009] If not, adjust the sheet feeding length of the material belt according to the deviation between the initial position information and the second number of predicted position information to complete the cutting after sheet feeding;

[0010] If yes, adjust the initial position information of the tab template according to the size of the next target tab to be cut in the material belt, and adjust the sheet feeding length of the material belt according to the deviation between the adjusted initial position information and the first number of predicted position information to complete the cutting after sheet feeding;

[0011] Wherein, the second number is greater than the first number.

[0012] Further, the determining whether the pole piece template needs to be adjusted according to the deviation between the initial position information and the predicted position information comprises:

[0013] Comparing the predicted position information of the first number of target pole pieces with the adjusted initial position information to obtain corresponding first compensation values;

[0014] Detecting whether the first compensation values corresponding to the first continuous preset number of target pole pieces are greater than a first preset threshold value to determine whether the pole piece template needs to be adjusted.

[0015] Further, the adjusting the feeding length of the material strip according to the deviation between the adjusted initial position information and the first number of predicted position information comprises:

[0016] Determining the feeding length of the material strip according to the first number, the first compensation values, and a basic strip length of the material strip.

[0017] Further, the determining the feeding length of the material strip according to the first number, the first compensation values, and a basic strip length of the material strip comprises:

[0018] L1=L0+△L Data1 ;

[0019] △L Data1 =(Data1 X1 +Data1 X2 +……+Data1 Xn1 ) / n1 / n1;

[0020] Wherein, L0 is the basic strip length of the material strip, L1 is the feeding length of the material strip, △L Data1 is the first interval compensation value, n1 is the first number, Data1 X1 , Data1 X2 , …, Data1 Xn1 are the first compensation values corresponding to each pole lug in the first number of target pole pieces.

[0021] Further, the method further comprises:

[0022] After the material strip is cut, it is judged whether the first number of pole pieces is cut;

[0023] If not, return to execute the step of adjusting the initial position information of the pole piece template according to the size of the next target pole piece to be cut in the material strip, adjusting the feeding length of the material strip according to the deviation between the adjusted initial position information and the predicted position information, and completing the cutting after feeding.

[0024] If completed, return to the step of determining whether the electrode template and subsequent steps need to be adjusted based on the deviation between the initial position information and the predicted position information.

[0025] Furthermore, adjusting the feed length of the strip based on the deviation between the initial position information and the second number of predicted position information includes:

[0026] The predicted position information of the second number of target electrodes is compared with the initial position information to obtain the corresponding second compensation value;

[0027] The feeding length of the material strip is determined based on the second quantity, each of the second compensation values, and the basic strip length.

[0028] Furthermore, the step of calculating and determining the feeding length of the material strip based on the second quantity, each of the second compensation values, and the basic strip length includes:

[0029] L2 = L0 + △L Data2 ;

[0030] △L Data2 =(Data2 X1 +Data2 X2 +……+Data2 Xn2 ) / n2 / n2;

[0031] Where L0 is the base strip length, L2 is the strip feeding length, and △L Data2 Data2 is the second spacing compensation value, and n2 is the second quantity, which depends on the number of target electrodes between the cutting station and the inspection station, wherein the cutting station is used to cut the electrodes, and the inspection station is used to inspect the tabs of the conveyor belt. X1 Data2 X2 ..., Data2 Xn2 This is the second compensation value corresponding to each tab in the second number of target electrodes.

[0032] Furthermore, it also includes:

[0033] Determine the standard edge distance information of the electrode template;

[0034] Each electrode unit obtained after cutting is inspected to obtain the actual edge distance information of the electrode unit;

[0035] Determine whether the margin deviation value between the standard margin information and each of the actual margin information reaches a preset deviation threshold.

[0036] If so, after obtaining the third number of the edge deviation values, when the average value of each edge deviation value reaches the preset average threshold, the corresponding compensation value is calculated based on the third number and the average value of each edge deviation value. The feeding length of the material strip is recalculated based on the second number, each of the second compensation values, the compensation value, and the basic length of the material strip.

[0037] Furthermore, the step of recalculating the feed length of the material strip based on the second quantity, each of the second compensation values, the counter-compensation value, and the basic strip length includes:

[0038] L2 = L0 + △L Data2 +△L Data3 ;

[0039] △L Data2 =(Data2 X1 +Data2 X2 +……+Data2 Xn2 ) / n2 / n2;

[0040] △L Data3 =R 极耳边距mean *α / n2;

[0041] R 极耳边距mean =(Data2 Y1 +Data2 Y2 +……+Data2 Yn3 ) / n3;

[0042] Where L0 is the base strip length, L2 is the recalculated strip feeding length, and △L Data2 As the second compensation value, △L Data3 n2 is the second quantity, which depends on the number of target electrodes between the cutting station and the inspection station, wherein the cutting station is used to cut the electrodes and the inspection station is used to inspect the tabs of the conveyor belt; n3 is the third quantity; R 极耳边距mean Data2 represents the average value of the margin deviation, where α is a set coefficient. X1 Data2 X2 ..., Data2 Xn2 Data2 is the compensation value corresponding to the tab spacing in the second number of target electrodes. Y1 +Data2 Y2 +……+Data2 Yn3 This is the edge distance deviation value corresponding to the third number of electrode units.

[0043] Furthermore, it also includes:

[0044] When the deviation between the standard margin information and the actual margin information of the second preset number of electrode units is greater than the second preset threshold, the need to adjust the electrode template is triggered.

[0045] And / or, after a skipped cut is detected in the target electrode, if the actual edge distance information of the third consecutive preset number of electrode units is outside the acceptable edge distance size range, the need to adjust the electrode template is triggered.

[0046] As can be seen from the above technical solutions, the embodiments of this application have at least the following beneficial effects: by determining the deviation based on the initial position information and judging based on the deviation between the initial position information and the predicted position information, under normal compensation, the roller feeding length of the electrode sheet is finely adjusted in a closed loop using a second number of predicted position information. When the deviation is large, the electrode sheet template is updated in time, and a smaller number of predicted position information than the second number used for normal compensation is used for closed-loop fine adjustment, thereby achieving the effect of quickly correcting back to the normal size electrode sheet and reducing abnormal sheet arrangement.

[0047] A second aspect of this application provides a die-cutting machine, including: using a sheet size control method as described in the first aspect of this application.

[0048] It is easy to understand that the die-cutting machine in the second aspect embodiment of this application has the same technical effect as the closed-loop correction-based sheet size control method in the first aspect embodiment, and therefore will not be described again.

[0049] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0050] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0051] Fig. 1 A schematic diagram of a die-cutting machine provided in one embodiment of this application;

[0052] Fig. 2 A control logic diagram based on a first detection device is provided for one embodiment of this application;

[0053] Fig. 3 This is a control logic diagram based on a second detection device provided in one embodiment of this application.

[0054] Figure label:

[0055] 101. First detection device; 102. Drive device; 103. Second detection device; 104. Cutting device. Detailed Implementation

[0056] 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. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0057] See Figs. 1-3 As shown, an embodiment of the first aspect of this application discloses a method for controlling the size of a wafer based on closed-loop correction, comprising the following steps:

[0058] Determine the initial position information of the electrode template;

[0059] The tabs of the material strip are inspected to obtain the predicted position information of each target electrode.

[0060] Based on the deviation between the initial position information and the predicted position information, determine whether the electrode template needs to be adjusted;

[0061] If not required, adjust the feeding length of the strip according to the deviation between the initial position information and the predicted position information of the second quantity, so as to complete the cutting after feeding;

[0062] If necessary, adjust the initial position information of the electrode template according to the size of the next target electrode to be cut in the strip, and adjust the feeding length of the strip according to the deviation between the adjusted initial position information and the first number of predicted position information, so as to complete the cutting after feeding.

[0063] The second quantity is greater than the first quantity.

[0064] In the embodiments of this application, the deviation is determined based on the initial position information, and a judgment is made based on the deviation between the initial position information and the predicted position information. Under normal compensation, the roller feeding length of the electrode sheet is finely adjusted in a closed loop using a second number of predicted position information. When the deviation is large, the electrode sheet template is updated in time, and a first number of predicted position information, which is less than the second number used for normal compensation, is used for closed-loop fine adjustment, thereby achieving the effect of quickly correcting back to the normal size electrode sheet and reducing abnormal sheet arrangement.

[0065] It is understandable that, in some embodiments, when determining the initial position information of the electrode template, when obtaining the electrode template, and when determining the standard position and size information of the template, the template can be set or established by a control device, or the first sheet of the uncut strip can be used as a reference. By ensuring that the first electrode sheet is an electrode sheet with the required size, the template electrode sheet can be established. When obtaining the predicted position information of each target electrode sheet, the tab spacing in the uncut strip can be detected by the first detection device 101 to obtain the actual position and actual size information of several consecutive target electrodes. When the tab spacing in the uncut strip is detected by the first detection device 101, and the actual tab spacing of the target electrode sheet is obtained, the corresponding compensation value can be obtained based on the tab spacing template position established by the electrode template. When the actual tab spacing of several consecutive target electrodes is obtained, the corresponding compensation values ​​of each target electrode sheet are obtained simultaneously, providing a closed-loop control basis for subsequent normal electrode cutting or subsequent rapid correction and cutting.

[0066] It is understandable that in some embodiments, the adjustment of the electrode template is usually achieved by automatic electrode finder. The electrode finder captures the electrode tabs, finds the corresponding electrode, and controls the roller feeding length to ensure that the first electrode after finding the electrode tab is an electrode with the correct size. The electrode template is updated accordingly, and the initial position information of the electrode template is updated and adjusted. The subsequent closed-loop correction of the sheet size control is performed based on the adjusted initial position information or the continuously updated initial position information, thereby achieving the effect of rapid correction.

[0067] It should be understood that if the electrode template does not need to be adjusted, that is, if automatic electrode finding is not required, it means that there is no problem of skipping cuts, abnormal incoming materials, etc., which would lead to too many defective electrodes with poor dimensions during the electrode production process. In this case, based on the set electrode module, the compensation value is obtained according to the deviation between the initial position information and the predicted position information, and then the closed-loop adjustment control of the size is performed and the electrode is cut.

[0068] It should be noted that determining whether to adjust the electrode template based on the deviation between the initial and predicted position information involves using preset trigger logic to determine whether automatic electrode finding is needed. This can be further understood as the equipment's judgment on whether closed-loop correction exceeds its correction capability when encountering operational coordination defects and / or incoming material defects. For example, abnormal incoming electrode tabs constitute a "morphological defect," in which case the preset benchmarks relied upon in traditional correction methods cannot detect it in time. When this exceeds the functional range of the automatic correction device, it can easily lead to a situation where timely correction is not possible.

[0069] For example, "skip-cut" can be understood as a situation where the cutting is discontinuous. For instance, if the electrode has local defects such as tab folding or surface defects after processes like stirring, coating, and rolling, a mark will be affixed to the corresponding position. During the cutting process, after the equipment detects the yellow mark, it controls the cutting blade to skip the portion of the electrode strip with the yellow mark, without cutting it, and operates on the subsequent normal portion. However, after the marked skip-cut, the actual position of the strip is misaligned with the system's preset position, and this deviation accumulates with production, easily leading to situations where timely correction is not possible. Furthermore, in some embodiments, marked skip-cut can be implemented by configuring a sensor on the equipment to detect the mark. After the sensor identifies the mark signal, it transmits it to the control system, which controls the cutting blade to skip the yellow mark portion according to a preset program. Moreover, to ensure production continuity and electrode dimensional accuracy, after skipping the yellow mark, the equipment will automatically adjust and compensate for parameters such as the cutting position and length of the subsequent electrode.

[0070] Therefore, when automatic electrode finding is required, it indicates that at least one of the following situations may have occurred during the sheet preparation process: skipping, abnormal incoming materials, etc., which may lead to an excessive number of defective sheets with poor dimensions. In this case, it is necessary to re-establish the electrode template and obtain the positioning value of the drive device 102 for sheet feeding based on different calculation methods before the closed-loop adjustment and control of the dimensions can be carried out, so as to achieve the effect of timely system reset before the deviation seriously affects a large number of products.

[0071] In some embodiments, automatic electrode finding is achieved through an electrode finding device. The electrode finding device captures the electrode position in real time through sensors (CCD vision, photoelectric, laser, etc.). When anomalies are detected, such as deviation exceeding the threshold, skipping, or incoming material defects, a process for repositioning the electrode reference is triggered to ensure that the electrode position always meets the process requirements.

[0072] It should be understood that in some embodiments, this application first obtains the electrode template, determines the standard position and size information of the electrode template, and then obtains the position and size information of the first electrode (actually a segment of the uncut strip) detected by the first detection device 101. By comparing the standard position and size information, the compensation value corresponding to the first electrode (the offset between the actual electrode and the template electrode position) is obtained. Following the above steps, several consecutive target electrodes are obtained. Based on the compensation values ​​of the preset number of target electrodes, it is determined whether automatic electrode tab finding is required. If automatic electrode tab finding is required, the strip is controlled to move by the drive device 102 until the electrode tab finding device captures the electrode tab. At this time, a first number of consecutive target electrodes and their compensation values ​​are obtained to obtain the roller conveyor motor positioning value through a preset first correction formula. The electrode cutting is then completed after the roller conveyor feeds the electrode. If automatic electrode tab finding is not required, a second number of consecutive target electrodes and their compensation values ​​are obtained to obtain the roller conveyor motor positioning value through a preset second correction formula. The electrode cutting is then completed after the roller conveyor feeds the electrode.

[0073] It should be noted that the second quantity is greater than the first quantity. For example, based on project debugging experience, the first quantity can be set to 1 / 2 of the second quantity, wherein the second quantity is determined by the number of electrode sheets to be cut between the first detection device 101 and the cutting blade.

[0074] Understandably, the first detection device 101 changes the specific number of target electrodes to be detected based on whether the automatic electrode finder is triggered. When the automatic electrode finder is not needed, the second positioning value is calculated using the normal mode as the single-electrode position compensation amount. When the automatic electrode finder is needed, the first positioning value is calculated using the fast compensation mode as the single-electrode position compensation amount, and the correction speed is accelerated by limiting the second number to be greater than the first number.

[0075] The following will combine Figs. 1-3 The film size control method based on closed-loop correction disclosed in the embodiments of this application will be explained and described in detail.

[0076] In some embodiments of this application, determining whether the electrode template needs adjustment based on the deviation between the initial position information and the predicted position information includes:

[0077] The predicted position information of the first number of target electrodes is compared with the adjusted initial position information to obtain the corresponding first compensation value.

[0078] The system detects whether the first compensation value corresponding to the first preset number of consecutive target electrodes is greater than the first preset threshold to determine whether the electrode template needs to be adjusted.

[0079] Understandably, in this embodiment, by comparing the predicted position information with the adjusted initial position information, a corresponding first compensation value is obtained, which can be understood as the offset between the actual electrode and the template electrode position. Based on this, the offset can be used as one of the conditions for determining whether the electrode template needs to be adjusted.

[0080] Specifically, when the first compensation value Data corresponds to three consecutive target electrodes... X >3. Automatically triggers the polarity seeker to avoid excessive deviation values ​​and slow automatic compensation, which could lead to excessive film arrangement.

[0081] In some embodiments of this application, adjusting the feed length of the strip based on the deviation between the adjusted initial position information and a first number of predicted position information includes:

[0082] The feeding length of the material strip is determined based on the first quantity, each first compensation value, and the basic strip length.

[0083] Understandably, if it is necessary to adjust the electrode template, that is, when automatic electrode finding is required, the electrode is first captured by the electrode finding device and used as a new electrode template. Then, the first detection device 101 continuously obtains the first compensation value corresponding to the first number of target electrodes. The first positioning value is calculated based on the first number and each first compensation value. The feeding length of the material strip is determined based on the first positioning value. The electrode is fed by the drive device 102 to complete the electrode cutting.

[0084] Exemplary, in some embodiments, reference is made to Fig. 2 The feeding length of the material strip is calculated and determined based on the first quantity, each first compensation value, and the basic strip length, including:

[0085] L1 = L0 + △L Data1 ;

[0086] △L Data1 = (Data1) X1 +Data1 X2 +……+Data1 Xn1 ) / n1 / n1;

[0087] Where L0 is the base strip length, L1 is the strip feeding length, and △L Data1 Data1 is the first spacing compensation value, n1 is the first quantity, and Data1 is the first spacing compensation value. X1 Data1 X2 ..., Data1 Xn1 This is the first compensation value corresponding to each tab in the first number of target electrodes.

[0088] Understandably, the average of the compensation values ​​for the deviation between the electrode tab and the electrode template position (n1) is taken and then divided by n1. This is because the distance between the electrode tab spacing, the CCD camera, and the cutter is n1 pieces. If the incoming electrode tab spacing is wider by a certain length, such as when there are 3 electrodes in between, the corresponding compensation value will be magnified by 3 times. Therefore, it needs to be divided by 3 to obtain the final compensation value per electrode. Based on this first spacing compensation value, the driving positioning value of the drive device 102 can be calculated. That is, when the drive device 102 performs roller feeding, the roller feeding electrode positioning value = electrode length + spacing compensation value.

[0089] In some embodiments of this application, it also includes:

[0090] After cutting the material strip, determine whether the first quantity of electrode sheets has been cut;

[0091] If not completed, return to the previous step and adjust the initial position information of the electrode template according to the size of the next target electrode to be cut in the material strip. Based on the deviation between the adjusted initial position information and the first number of predicted position information, adjust the feeding length of the material strip to complete the cutting step after feeding.

[0092] If completed, return to the previous step and determine whether to adjust the electrode template and subsequent steps based on the deviation between the initial position information and the predicted position information.

[0093] Understandably, after adjusting the initial position information of the electrode template, the deviation between the adjusted initial position information and the predicted position information can be used to adjust the feeding length of the strip and complete the closed-loop correction in size. After the first number of electrode pieces are cut, it means that the electrode template has been successfully adjusted or updated. Therefore, the control step can be returned to the step of determining whether the electrode template needs to be adjusted. Since it is easy to return to the step of not needing to adjust the electrode template after the electrode template is adjusted, the subsequent corresponding steps are executed to achieve electrode cutting. When the situation of needing to adjust the electrode template is encountered again, the step of needing to adjust the electrode template is returned. After adjustment, the process returns to the step of determining whether the electrode template has been successfully adjusted, and so on, thereby ensuring the stability of production quality.

[0094] In some embodiments of this application, adjusting the feed length of the conveyor belt based on the deviation between the initial position information and the second number of predicted position information includes:

[0095] The predicted position information of the second number of target electrodes is compared with the initial position information to obtain the corresponding second compensation value;

[0096] The feeding length of the material strip is determined based on the second quantity, each second compensation value, and the basic strip length.

[0097] Understandably, if the electrode template does not need to be adjusted, that is, when automatic electrode finding is not required, the second compensation value corresponding to the second number of target electrodes is continuously obtained by the first detection device 101, the second positioning value is calculated based on the second number and each second compensation value, the feeding length of the material strip is determined based on the second positioning value, and the electrode is fed by the drive device 102 to complete the electrode cutting.

[0098] Exemplary, in some embodiments, reference is made to Fig. 2 The feeding length of the material strip is determined based on the second quantity, each second compensation value, and the basic strip length, including:

[0099] L2 = L0 + △L Data2 ;

[0100] △L Data2 =(Data2 X1 +Data2 X2 +……+Data2 Xn2 ) / n2 / n2;

[0101] Where L0 is the base strip length, L2 is the strip feeding length, and △L Data2 Data2 is the second spacing compensation value, and n2 is the second quantity. The second quantity depends on the number of target electrodes between the cutting station and the inspection station, where the cutting station is used to cut the electrodes and the inspection station is used to inspect the tabs of the conveyor belt. X1 Data2 X2 ..., Data2 Xn2 This is the second compensation value corresponding to each tab in the second number of target electrodes.

[0102] It is understandable that specific implementations of the compensation value algorithm include:

[0103] Establish template position: Ensure that the acquired electrode template or the first electrode after finding the electrode tab is an electrode of the correct size. Establish the template position of the first detection device 101 at this position. The deviation between the position of the electrode tab of the target electrode to be detected and the template position is the compensation value Data for the current electrode. X .

[0104] The compensation value is calculated by taking the average of the deviations between the electrode tabs and the electrode template position of n2 and then dividing it by n2. The reason is that the distance between the electrode tabs and the CCD camera and the cutter is n2 pieces. If the electrode tab spacing of the incoming material is wider by a certain length, such as 6 electrode tabs in between, the corresponding compensation value will be magnified by 6 times. Therefore, it needs to be divided by 6 to get the final compensation value per piece. When the roller conveying device 102 is executed, the roller conveying positioning value = piece length + compensation value.

[0105] For example, when establishing the template position of the electrode tab in the electrode template, if automatic electrode tab finding is not required, the obtained electrode template is used as a reference. Taking the existence of 6 target electrodes between the first detection device 101 and the cutting device 104 as an example, under normal circumstances, the compensation value Data of 6 electrodes detected by the first detection device 101 is taken. X The second compensation value is obtained by taking the average and then dividing it by 6. It should be noted that the reason for dividing by 6 is that there are 6 sheets between the electrode spacing detection position and the cutting edge position; dividing by 6 eliminates the effect of the compensation value being magnified 6 times. If automatic electrode finding is required, the first sheet after electrode finding is taken as the electrode with the correct size, and the electrode spacing CCD template position is established at this position. After finding the electrode, the compensation amount is magnified, and the compensation value of 3 sheets is taken instead. X The mean value is then divided by 3. The reduction in the number of electrodes obtained can speed up the polarity finding process and quickly correct for any abnormal electrode arrangement.

[0106] The above compensation method can be understood as follows: when a total of 6 electrode strips need to be cut, each strip to be cut at that moment does not need to be cut to the correct size in one go. For example, if the positional deviation of the electrode tab spacing measured by the CCD is 0.2mm (after taking the average value), it is not necessary to immediately compensate for 0.2mm, but only to compensate for 0.2 / 6mm. This ensures stability during the sheet production process, that is, under the premise of a certain allowable error, the compensation value should not fluctuate too much each time, which would lead to unstable strip feeding. Moreover, after these 6 strips have been corrected, the entire strip has actually been compensated for 0.2mm. It can be understood that this method is intended to solve the problem of too many NG size abnormal sheets caused by skip cutting and abnormal incoming materials. Its purpose is to quickly correct back to normal size electrode sheets and reduce abnormal sheet arrangement.

[0107] In some embodiments of this application, specific references are made. Fig. 3 It also includes:

[0108] Determine the standard edge distance information for the electrode template;

[0109] Each electrode unit obtained after cutting is inspected to obtain the actual edge distance information of the electrode unit;

[0110] Determine whether the margin deviation between the standard margin information and each actual margin information reaches the preset deviation threshold.

[0111] If so, after obtaining the third number of edge deviation values, when the average value of each edge deviation value reaches the preset average threshold, the corresponding counter-compensation value is calculated based on the third number and the average value of each edge deviation value. The feeding length of the material strip is recalculated based on the second number, each second compensation value, the counter-compensation value, and the basic length of the material strip.

[0112] Understandably, in some embodiments, the dimensional feedback after cutting is obtained through another CCD, and closed-loop control of the sheet size is achieved based on the feedback information. Specifically, during production, the tab spacing of the incoming material may fluctuate. The above method can compensate in real time based on the actual detected tab edge distance deviation. This ensures that even if the tab spacing changes, a suitable compensation value can be calculated, allowing the equipment to automatically accommodate such fluctuations, reducing sheet size defects caused by differences in incoming materials, and improving equipment compatibility and production stability.

[0113] For example, it is determined whether the deviation value between the standard margin information and each actual margin information reaches the preset deviation threshold. If not, the margin deviation values ​​are not accumulated and the loop is exited directly. If so, the margin deviation value and its quantity are recorded. When the number of recorded margin deviation values ​​in a certain production batch does not reach the third quantity, the loop is exited directly. If the number of recorded margin deviation values ​​reaches the third quantity, the average of the third quantity of margin deviation values ​​is taken, and it is determined whether the average value reaches the preset average threshold, that is, whether it is within the preset average threshold range. If not, the recorded margin deviation value is cleared to zero and the count is restarted. At this time, the process returns to the step of adjusting the electrode template and closing the loop to correct the size. If it is determined that the average value of each margin deviation value reaches the preset average threshold, the feeding length of the strip is recalculated through the preset calculation method, thereby improving the quality of the cut electrode.

[0114] For example, in some embodiments, the feed length of the material strip is recalculated based on the second quantity, each second compensation value, the counter-compensation value, and the basic strip length, including:

[0115] L2 = L0 + △L Data2 +△L Data3 ;

[0116] △L Data2 =(Data2 X1 +Data2 X2 +……+Data2 Xn2 ) / n2 / n2;

[0117] △L Data3 =R 极耳边距mean *α / n2;

[0118] R 极耳边距mean =(Data2 Y1 +Data2 Y2 +……+Data2 Yn3 ) / n3;

[0119] Where L0 is the base strip length, L2 is the recalculated strip feeding length, and △L Data2 As the second compensation value, △L Data3 n2 is the second quantity, which depends on the number of target electrodes between the cutting station and the inspection station. The cutting station is used to cut the electrodes, and the inspection station is used to inspect the tabs of the conveyor belt. n3 is the third quantity, R 极耳边距mean Data2 represents the average value of the margin deviation, where α is a set coefficient. X1 Data2 X2 ..., Data2 Xn2 Data2 represents the compensation value corresponding to the tab spacing in the second number of target electrodes. Y1+Data2 Y2 +……+Data2 Yn3 This is the edge distance deviation value corresponding to the third number of electrode units.

[0120] Understandably, the back-compensation value is a dynamic adjustment calculated to offset various deviations during the production process. Its core function is to ensure that the actual cut electrode length returns to the standard length, or to ensure that the electrode tab position meets the preset requirements. By calculating the second positioning value based on the second quantity, each second compensation value, and the back-compensation value, a dual closed-loop design is used to ensure bidirectional stability of the electrode width and edge distance, with controllable fluctuation range.

[0121] It is understandable that the stability of the width of each electrode sheet is related to the stability of the electrode tab distance. If the width of the electrode tab distance of the incoming material is too large, and the template offset value of the original incoming material size is still used for compensation, the cut edge distance will deviate from the actual standard value. In this case, the compensation value needs to be corrected a second time to ensure that the cut edge distance meets the standard value requirements.

[0122] To address this, it is necessary to use the actual margin difference captured by the size camera for back-compensation, and the margin deviation value Data is required. Y =Current edge margin - Standard edge margin;

[0123] For example, the principle of the inverse final value algorithm includes:

[0124] If the margin compensation value of the current film size captured by the CCD is less than 0.3mm, it is recorded as a valid value. 25 consecutive valid values ​​are recorded, and their average value is multiplied by a coefficient of 0.7 and divided by 6; that is, the final compensation value = R. 极耳边距mean *0.7 / 6; Multiplying by 0.7 is to ensure that the distance between the two sides of the electrode tab can be controlled within the effective range. Dividing by 6 is consistent with the above principle, because the compensation of 6 intervals is expanded by 6 times, so it is necessary to divide by 6 (0.7 is an empirical value for project debugging, and the coefficient can be set according to the allowable error range in practice).

[0125] Based on the above description, the roller feeding operation of the drive device 102 is as follows: Roller feeding sheet positioning value = sheet length + tab spacing CCD compensation value + size CCD back compensation value.

[0126] The purpose of the above method is to automatically accommodate fluctuations in the electrode tab spacing of incoming materials, thereby improving equipment compatibility. By calculating the final back-compensation value using this formula and applying it to the adjustment of the roller conveyor motor positioning value, the cutting position of the electrode sheet can be precisely corrected, ensuring that the electrode sheet size and tab edge distance fluctuation range always remain within the preset range, thus improving electrode sheet quality.

[0127] Understandably, when determining whether to automatically search for the electrode trigger logic preset, multiple trigger conditions can be used to make the judgment, thereby comprehensively covering different types of abnormal scenarios and ensuring that the system can automatically and promptly reset under various circumstances, avoiding the production of defective products over a long period of time.

[0128] In some embodiments, when the deviation between the standard margin information and the actual margin information of the second preset number of electrode units is detected to be greater than a second preset threshold, the need to adjust the electrode template is triggered.

[0129] Specifically, the size CCD automatically triggers the electrode seeker when it detects eight consecutive electrodes with abnormal edge distances, thus avoiding a situation where there is a continuous NG (not up to standard) electrode arrangement.

[0130] In some embodiments, when a skipped cut is detected in the target electrode, and the actual edge distance information of the third consecutive preset number of electrode units is outside the acceptable edge distance size range, the need to adjust the electrode template is triggered.

[0131] Specifically, after a skip cut, two consecutive electrode films of NG size will automatically trigger the electrode seeker to avoid abnormal film arrangement caused by a large deviation between the film position and the template position after the skip cut, which would prevent the automatic compensation from being able to keep up.

[0132] It is understood that the film size control method of this application embodiment can quickly recover to normal after skip cutting and abnormal material arrival through multi-condition triggering and fast compensation mode, thereby reducing the number of abnormal film arrangements.

[0133] In one specific embodiment, this application provides a closed-loop method for wafer fabrication size, comprising the following steps:

[0134] Step S1: System initialization and template establishment. Obtain the standard template of the electrode and determine its standard position and size information as the benchmark for all subsequent testing and compensation.

[0135] Step S2: Online detection and compensation value calculation, including:

[0136] a. Using a CCD sensor to detect the electrode spacing, the position information of the electrodes in the strip to be cut is obtained in real time and compared with a standard template to calculate the position deviation compensation value (Data). X .

[0137] b. Using a size detection CCD, the actual edge distance of the cut electrode sheet is acquired in real time and compared with the standard edge distance to calculate the size deviation compensation value (Data). Y .

[0138] Step S3: Anomaly detection and "polarity seeker" mechanism triggering based on data from multiple consecutive electrode sheets. X and Data YTrend of change to determine whether the following abnormal conditions occur:

[0139] Data of the position deviation of multiple consecutive tabs X Exceed the first preset threshold;

[0140] Mark that the size determination of multiple consecutive tabs is unqualified after jump cutting;

[0141] The margin size determination of multiple consecutive tabs is unqualified.

[0142] When any of the above abnormal conditions occurs, the "tab search" process is automatically triggered, that is, the roller feeding motor is controlled to drive the tape movement until the tab search photoelectric sensor captures a clear tab signal and a detection reference is re-established.

[0143] Step S4: Dynamic compensation and cutting execution, including:

[0144] a. Position compensation: According to whether the "tab search" mechanism is triggered, different compensation strategies are used to calculate the final position compensation amount.

[0145] Normal mode: Take the average value of the Data of the nearest consecutive N pieces X and then divide it by N (N is the number of tabs between the tab pitch CCD and the cutting knife) to obtain the single-piece position compensation amount.

[0146] Fast compensation mode (after tab search): Take the average value of the Data of the nearest consecutive M pieces X and then divide it by M (M < N) to obtain the single-piece position compensation amount to accelerate the deviation correction speed.

[0147] b. Size reverse compensation: Filter and weight the deviation value Data of the size CCD Y to calculate the final size reverse compensation amount.

[0148] c. Comprehensive execution: The final positioning value of the roller feeding motor = standard sheet length + position compensation amount + size reverse compensation amount. The control system drives the roller feeding motor to feed the sheet according to this positioning value, and then controls the cutting knife to complete the cutting.

[0149] Step S5: Loop back to step S2 to perform real-time detection and closed-loop control on the next tab to achieve continuous production.

[0150] Understandably, the tab spacing detection CCD is installed upstream of the cutting blade to detect the positional deviation of the tabs on the uncut strip and provide predictive compensation values. The size detection CCD is installed downstream of the cutting blade to detect the actual edge distance of the cut electrode sheets and provide result-based back-compensation values. Through the coordinated work of the predictive compensation from the tab spacing detection CCD and the result-based back-compensation from the size detection CCD, the roller feed length is finely adjusted in real time. For example, in the staged compensation algorithm, the average value of 6 sheets is used normally, and the average value of 3 sheets is used after tab finding, in conjunction with multi-condition automatic tab finding triggering, such as large deviations in 3 consecutive sheets, abnormalities after skip cutting, etc., and a secondary back-compensation mechanism, such as determining whether automatic tab finding is needed based on 25 sets of effective edge distance data. This significantly improves the response speed under abnormal conditions such as yellow-mark skip cutting and tab folding, greatly reduces abnormal sheet arrangement, stably controls electrode size, and effectively improves sheet yield.

[0151] It is understandable that during the wafer stacking process, the incoming material is a roll of material that has already undergone processes such as mixing, coating, rolling, slitting, and drying. The wafer stacking machine is used to cut the incoming material (i.e., the coated substrate) into electrode sheets. The positive electrode is usually aluminum foil coated with positive electrode material (such as lithium iron phosphate, ternary materials), and the negative electrode is usually copper foil coated with negative electrode material (such as graphite). During the wafer fabrication process, it is easy to fail to correct in time due to skipped cutting and abnormal electrode tabs / abnormal electrode state. Therefore, this application aims to optimize its algorithm and compensation method to solve this abnormal situation. Specifically, in some embodiments, an algorithm is proposed to fine-tune the rolling length of the positive and negative electrode sheets by receiving the correction compensation value of the electrode tab detection CCD, and at the same time, to perform back-compensation correction by using the compensation value of the size detection CCD camera to avoid edge distance defects caused by changes in the electrode tab spacing of the incoming material.

[0152] It should be understood that this application includes closed-loop compensation control of electrode size and / or tab distance in the wafer stacking process, but is not limited to wafer stacking machines. It involves all models with similar mechanisms, and the stability of electrode size width and tab distance can be controlled by this method. Similarly, it is not limited to electrodes, and the wafers of other sheet-like materials can also be prepared. The principle is the same, and it will not be described in further detail here.

[0153] The following describes in detail, with a specific embodiment, the film size control method based on closed-loop correction according to this application. It should be noted that the following embodiment is merely an exemplary description and should not be construed as limiting the embodiments of this application.

[0154] See Figs. 1-3As shown in this embodiment, the sheet size control method based on closed-loop correction is applied to the sheet production station of a die-cutting machine. The main mechanisms may include a tab spacing detection CCD, a size detection CCD, a tab seeker photoelectric sensor, a roller conveyor motor, and a cutting blade. The method fine-tunes the roller conveying length of the positive and negative electrodes by receiving the correction compensation value from the tab detection CCD. At the same time, it uses the compensation value from the size detection CCD camera for PID back-compensation correction to avoid edge defects caused by changes in the tab spacing of the incoming material. The closed-loop correction is achieved through the compensation values ​​of these two CCD cameras, ensuring that the electrode cutting width and tab edge distance are always kept within a certain range. In addition, a control method is added to quickly compensate back after yellow mark skipping, reducing the number of skipped sheets. After reducing the offset, manual adjustment is required to achieve automatic closed-loop correction, thereby solving the problem of a large number of defective electrodes with abnormal edge distances and widths caused by factors such as yellow mark skipping, fluctuations in the tab spacing of the incoming material, and tab folding, which prevent the electrode correction from being completed. This improves the sheet production yield.

[0155] The second aspect of this application discloses a die-cutting machine, including: using a sheet size control method as described in the first aspect embodiment.

[0156] It is understood that the content of the above method embodiments is applicable to the present device embodiments. The specific functions implemented by the present device embodiments are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0157] In some embodiments, the die-cutting machine includes: a first detection device 101, a electrode seeker device, a drive device 102, and a cutting device 104, which finely adjusts the roller feeding length of the positive and negative electrode sheets by receiving the correction compensation value of the electrode detection.

[0158] Furthermore, in some embodiments, the die-cutting machine also includes a second detection device 103, which uses the compensation value from the size detection to perform back-compensation and correction to avoid edge defects caused by changes in the spacing between the incoming material tabs.

[0159] For example, the first detection device 101 is a tab spacing detection CCD camera, the second detection device 103 is a size detection CCD camera, the tab finding device is a tab finding photoelectric sensor, the driving device 102 is a roller conveyor motor, and the cutting device 104 includes a cutting blade, etc. Specifically, the roller conveyor motor is used to accurately convey the material strip, the cutting blade is used to cut the material strip into single electrode sheets, the tab spacing detection CCD camera is used to detect the position of the tabs in the material strip to be cut, the size detection CCD camera is used to detect the edge distance dimension of the cut electrode sheets, and the tab finding photoelectric sensor is used to quickly locate the tabs and reconstruct the reference in case of abnormalities. Furthermore, the die-cutting machine also includes an unwinding mechanism and a control device. The unwinding mechanism is used to install and release the rolled electrode sheet material, and the control device can be a PLC, electrically connected to the above-mentioned mechanisms, used to calculate compensation values ​​and drive the actions of each actuator, and to execute the sheet size control method as described in the first aspect embodiment.

[0160] Understandably, die-cutting machines are used to solve problems such as large fluctuations in the electrode tab distance and electrode width during the stacking process, abnormal sheet arrangement caused by the correction and compensation process in the case of skipped cutting and abnormal electrode tabs, and dimensional fluctuations caused by changes in the electrode tab spacing of incoming materials. They enable automatic closed-loop adjustment of the roller feeding length during the sheet making process, ensuring that the electrode size and electrode tab distance fluctuation range are always kept within the preset range, thereby improving sheet making accuracy.

[0161] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. 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.

[0162] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "multiple" means two or more. It should be noted that the term "and / or" used herein is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Similarly, at least one of A or B can also represent: A alone, A and B simultaneously, or B alone.

[0163] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" 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 direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0164] In the foregoing description of this specification, references to terms such as "one embodiment," "another embodiment," or "some embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this application. In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0165] It should be understood that although the steps in the flowcharts of the accompanying figures are shown sequentially as indicated by the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the accompanying figures may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the sub-steps or stages of other steps.

[0166] Furthermore, although this application is described in the context of functional modules, it should be understood that, unless otherwise stated to the contrary, one or more of the functions and / or features may be integrated into a single physical device and / or software module, or one or more functions and / or features may be implemented in a separate physical device or software module. It is also understood that a detailed discussion of the actual implementation of each module is unnecessary for understanding this application. Rather, given the properties, functions, and internal relationships of the various functional modules in the apparatus disclosed herein, the actual implementation of the module will be understood within the scope of conventional technology for an engineer. Therefore, those skilled in the art can implement the application set forth in the claims using ordinary techniques without excessive experimentation. It is also understood that the specific concepts disclosed are merely illustrative and not intended to limit the scope of this application, which is determined by the full scope of the appended claims and their equivalents.

[0167] If a function is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0168] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device.

[0169] More specific examples of computer-readable media (a non-exhaustive list) include: electrical connections (electronic devices) having one or more wires, portable computer disk drives (magnetic devices), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Furthermore, computer-readable media can even be paper or other suitable media on which programs can be printed, because programs can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in computer memory.

[0170] It should be understood that various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

Claims

1. A method for controlling the size of a fabricated sheet based on closed-loop correction, characterized in that, Includes the following steps: Determine the initial position information of the electrode template; The tabs of the material strip are inspected to obtain the predicted position information of each target electrode. Based on the deviation between the initial position information and the predicted position information, determine whether the electrode template needs to be adjusted; If not required, adjust the feeding length of the strip according to the deviation between the initial position information and the second number of predicted position information to complete the cutting after feeding; If necessary, the initial position information of the electrode template is adjusted according to the size of the next target electrode to be cut in the strip. The feeding length of the strip is adjusted according to the deviation between the adjusted initial position information and the first number of predicted position information, so as to complete the cutting after feeding. The second quantity is greater than the first quantity.

2. The film size control method based on closed-loop correction according to claim 1, characterized in that, The step of determining whether the electrode template needs adjustment based on the deviation between the initial position information and the predicted position information includes: The predicted position information of the first number of target electrodes is compared with the adjusted initial position information to obtain the corresponding first compensation value; The system detects whether the first compensation value corresponding to the target electrode for a consecutive first preset number of sheets is greater than a first preset threshold, in order to determine whether the electrode template needs to be adjusted.

3. The film size control method based on closed-loop correction according to claim 2, characterized in that, The step of adjusting the feed length of the strip based on the deviation between the adjusted initial position information and the first number of predicted position information includes: The feeding length of the material strip is calculated and determined based on the first quantity, each of the first compensation values, and the basic strip length.

4. The film size control method based on closed-loop correction according to claim 3, characterized in that, The step of calculating and determining the feed length of the material strip based on the first quantity, each of the first compensation values, and the basic strip length includes: L1=L0+△L Data1 , △L Data1 =(Data1 X1 +Data1 X2 +……+Data1 Xn1 ) / n1 / n1; Where L0 is the base strip length, L1 is the strip feeding length, and △L Data1 Data1 is the first spacing compensation value, n1 is the first quantity, and Data1 is the first spacing compensation value. X1 Data1 X2 ..., Data1 Xn1 It is the first compensation value corresponding to each tab in the first number of target electrodes.

5. The film size control method based on closed-loop correction according to claim 2, characterized in that, Also includes: After cutting the strip, determine whether the first number of electrode sheets have been cut; If not completed, return to the step of adjusting the initial position information of the electrode template according to the size of the next target electrode to be cut in the material strip, and adjusting the feeding length of the material strip according to the deviation between the adjusted initial position information and the first number of predicted position information, so as to complete the cutting step after feeding. If completed, return to the step of determining whether the electrode template and subsequent steps need to be adjusted based on the deviation between the initial position information and the predicted position information.

6. The film size control method based on closed-loop correction according to claim 1, characterized in that, The step of adjusting the feed length of the strip based on the deviation between the initial position information and the second number of predicted position information includes: The predicted position information of the second number of target electrodes is compared with the initial position information to obtain the corresponding second compensation value; The feeding length of the material strip is determined based on the second quantity, each of the second compensation values, and the basic strip length.

7. The film size control method based on closed-loop correction according to claim 6, characterized in that, The step of calculating and determining the feed length of the material strip based on the second quantity, each of the second compensation values, and the basic strip length includes: L2=L0+△L Data2 ; △L Data2 =(Data2 X1 +Data2 X2 +……+Data2 Xn2 ( / n2 / n2;) Where L0 is the base strip length, L2 is the strip feeding length, and △L Data2 Data2 is the second spacing compensation value, and n2 is the second quantity, which depends on the number of target electrodes between the cutting station and the inspection station, wherein the cutting station is used to cut the electrodes, and the inspection station is used to inspect the tabs of the conveyor belt. X1 Data2 X2 ..., Data2 Xn2 This is the second compensation value corresponding to each tab in the second number of target electrodes.

8. The film size control method based on closed-loop correction according to claim 6, characterized in that, Also includes: Determine the standard edge distance information of the electrode template; Each electrode unit obtained after cutting is inspected to obtain the actual edge distance information of the electrode unit; Determine whether the margin deviation value between the standard margin information and each of the actual margin information reaches a preset deviation threshold. If so, after obtaining the third number of the edge deviation values, when the average value of each edge deviation value reaches the preset average threshold, the corresponding compensation value is calculated based on the third number and the average value of each edge deviation value. The feeding length of the material strip is recalculated based on the second number, each of the second compensation values, the compensation value, and the basic length of the material strip.

9. The film size control method based on closed-loop correction according to claim 8, characterized in that, The step of recalculating the feed length of the material strip based on the second quantity, each of the second compensation values, the counter-compensation value, and the basic strip length includes: L2=L0+△L Data2 +△L Data3 ; △L Data2 =(Data2 X1 +Data2 X2 +……+Data2 Xn2 ( / n2 / n2;) △L Data3 =R 极耳边距mean *α / n2; R 极耳边距mean =(Data2 Y1 +Data2 Y2 +……+Data2 Yn3 ) / n3; Where L0 is the base strip length, L2 is the recalculated strip feeding length, and △L Data2 As the second compensation value, △L Data3 n2 is the second quantity, which depends on the number of target electrodes between the cutting station and the inspection station, wherein the cutting station is used to cut the electrodes and the inspection station is used to inspect the tabs of the conveyor belt; n3 is the third quantity; R 极耳边距mean Data2 represents the average value of the margin deviation, where α is a set coefficient. X1 Data2 X2 ..., Data2 Xn2 Data2 is the compensation value corresponding to the tab spacing in the second number of target electrodes. Y1 +Data2 Y2 +……+Data2 Yn3 This is the edge distance deviation value corresponding to the third number of electrode units.

10. The film size control method based on closed-loop correction according to claim 8, characterized in that, Also includes: When the deviation between the standard margin information and the actual margin information of the second preset number of electrode units is greater than the second preset threshold, the need to adjust the electrode template is triggered. And / or, after a skipped cut is detected in the target electrode, if the actual edge distance information of the third consecutive preset number of electrode units is outside the acceptable edge distance size range, the need to adjust the electrode template is triggered.

11. A die-cutting machine, characterized in that, include: Use the film size control method as described in any one of claims 1 to 10.

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