Statistical method, system and equipment for cutting and stacking process data and medium

Abstract

The invention discloses a cutting and stacking process data statistics method, system and equipment and a medium, belongs to the technical field of pole piece defect detection, and solves the problems that errors exist during cutting and stacking process data statistics, and the destination of each pole piece is difficult to trace. According to the method, the single pole piece is coded, the defects of different detection items are divided into priorities, the information obtained by detection when the pole piece is transferred to each stage is bound with the pole piece code, the transfer information flow of each pole piece is formed, the destination of each pole piece can be searched according to the pole piece code information, and the detection efficiency is improved. The statistical sheet production yield and lamination yield data can be obtained more easily, and the accuracy of the data statistics of the cutting and stacking process is improved; and meanwhile, when the stacked core is abnormal, all information of the used pole pieces can be reversely traced by using the pole piece codes, so that the accuracy of counting various yields and tracing the information is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of pole piece defect detection, and relates to a method, system, device and medium for statistical analysis of data in the cutting and stacking process. Background Art

[0002] In the stacking process, the cut positive and negative pole pieces and the separator are stacked together in a "Z" shape. Taking one positive pole piece and one negative pole piece as a unit, a stacked core can have 20 - 90 units. In the existing stacking process, the pole pieces are mostly positioned and corrected on a positioning platform, then grabbed by a mechanical suction cup and stacked on a stacking table in sequence, and the CCD camera is used to detect the wrapping alignment degree. Due to the large number of detection items and the large number of pole pieces produced, there are errors in data statistics, and it is impossible to trace the whereabouts of each pole piece. For example, the matching between the number of produced pole pieces and the number of pole pieces used in a complete stacked core is affected by waste removal during intermediate detection, resulting in errors. Also, when a pole piece fails in both size detection and appearance detection, the determination type of the defective pole piece is not clearly distinguished.

[0003] The prior art, such as the invention patent with the application publication number CN118874856A, discloses a method for waste removal of pole pieces. A plurality of cut pole pieces are sequentially placed on an original conveyor belt; the original conveyor belt drives each of the pole pieces to pass through a detection mechanism in sequence; the qualified pole pieces are transported to a correction table, and the unqualified pole pieces are left on the original conveyor belt; the subsequent qualified pole pieces on the original conveyor belt are transported to the empty positions of the original unqualified pole pieces on the correction table.

[0004] Although this method can improve the utilization rate of pole piece materials by leaving the unqualified pole pieces on the original conveyor belt when transporting the qualified pole pieces to the correction table and supplementing the empty positions of the original unqualified pole pieces by transporting the subsequent pole pieces to the correction table again, when the pole pieces are transferred to the correction platform for secondary detection and waste removal, there are still defects such as errors in data statistics of the cutting and stacking process and difficulty in tracing the whereabouts of each pole piece. Summary of the Invention

[0005] The technical problem to be solved by the present invention is how to solve the problems of errors in data statistics of the cutting and stacking process and difficulty in tracing the whereabouts of each pole piece.

[0006] The present invention solves the above technical problems through the following technical solutions:

[0007] On the one hand, the present invention proposes a method for statistical analysis of data in the cutting and stacking process, including the following steps:

[0008] S1. Cut the positive and negative pole pieces with formed tabs, and sequentially code the pole pieces according to the cutting order;

[0009] S2. Conduct appearance detection and size detection on the pole pieces, divide the detection defect priorities for the detection items, determine whether the pole pieces are qualified, and bind the detection information to the pole piece codes;

[0010] S3. Transfer the qualified pole pieces to the rectification platform for secondary dimensional inspection and positioning inspection, determine whether the pole pieces are qualified, and bind the secondary inspection information to the pole piece code.

[0011] S4. Transfer the pole pieces that pass the secondary inspection to the stacking table for stacking, detect the coating parameters of the pole pieces, determine whether the pole pieces are qualified, and bind the stacking inspection information to the pole piece code.

[0012] S5. Conduct a stacking core inspection on the qualified stacking cores, determine whether the stacking cores are qualified, and bind the stacking core inspection information to the stacking core code and the corresponding pole piece code.

[0013] In the present invention, by coding individual pole pieces and prioritizing the defects of different inspection items, the information obtained from the inspection of the pole pieces transferred to each stage is bound to the pole piece code, forming a transfer information flow for each pole piece. According to the pole piece code information, the whereabouts of each pole piece can be found, and it is easier to obtain the data of the production yield of the pole pieces and the stacking yield, improving the accuracy of the data statistics of the cutting and stacking process. At the same time, when an abnormality occurs in the stacking core, all the information of the pole pieces used can be traced back in reverse using the pole piece code, improving the accuracy of the statistics of various yields and information traceability.

[0014] Further, the coding in S1 includes a combination of at least two of the distinguishing code, pole roll code, cutting and stacking machine number, production date, shift, and cutting serial number.

[0015] Further, the inspection defect priorities in S2 include an appearance inspection priority and a dimensional inspection priority;

[0016] The appearance inspection priority is greater than the dimensional inspection priority;

[0017] The appearance inspection priorities from high to low are unrolled, edge foil leakage, foil leakage, tape joint, scratch, bubble, black spot, and white spot in sequence;

[0018] The dimensional inspection priorities from high to low are pole piece breakage, tab folding or breakage, pole piece width exceeding the limit, tab width exceeding the limit, pole piece length exceeding the limit, tab height exceeding the limit, and shoulder width exceeding the limit in sequence.

[0019] Further, in S2, the following logic is used to determine whether the pole piece is qualified and bind the inspection information to the pole piece code:

[0020] When an appearance defect or dimensional defect is detected in the pole piece, it is determined that the pole piece is unqualified, and the pole pieces with inspection defects exceeding the standard are scrapped. If a single appearance defect or dimensional defect is detected in the pole piece, the inspection defect is directly bound to the pole piece code; if multiple defects are detected in the pole piece, the inspection defect with the highest priority is bound to the pole piece code.

[0021] When no appearance defect or dimensional defect is detected on the electrode tab, it is determined that the electrode tab is qualified, and the qualified detection information is bound to the electrode tab code.

[0022] Further, in step S3, the following logic representation is used to determine whether the electrode tab is qualified, and the secondary detection information is bound to the electrode tab code:

[0023] When a dimensional defect or positioning defect is detected on the electrode tab, it is determined that the electrode tab is unqualified, and the electrode tab with a detection defect exceeding the standard is scrapped. If a single dimensional defect or positioning defect is detected on the electrode tab, the detection defect is directly bound to the electrode tab code; if multiple defects are detected on the electrode tab, the detection defect with the highest priority is bound to the electrode tab code;

[0024] When no dimensional defect or positioning defect is detected on the electrode tab, it is determined that the electrode tab is qualified, and the secondary detection qualified information is bound to the electrode tab code;

[0025] The priority of the dimensional defect is greater than that of the positioning defect.

[0026] Further, in step S4, the following logic is used to determine whether the electrode tab is qualified, and the lamination detection information is bound to the electrode tab code:

[0027] If the coating parameters of the current electrode tab do not meet the standard requirements, it is determined that the current electrode tab is unqualified, the current electrode tab is scrapped, and the next electrode tab is replaced for lamination; if the coating parameters of more than five consecutive electrode tabs do not meet the standard requirements, the entire current laminated core is scrapped, and the scrap information is bound to the electrode tab code;

[0028] If the coating parameters of the current electrode tab meet the standard requirements, it is determined that the current electrode tab is qualified, the lamination code of the current laminated core is bound to the electrode tab code, and hot pressing is performed.

[0029] Further, the coating parameters in S4 include the distance from the negative electrode to the positive electrode and the distance from the separator to the negative electrode.

[0030] Further, in step S5, the following logic is used to determine whether the laminated core is qualified, and the lamination detection information is bound to the lamination code and the corresponding electrode tab code:

[0031] When the laminated core is unqualified, the unqualified information is bound to the lamination code and all the electrode tab codes corresponding to the laminated core;

[0032] When the laminated core is qualified, the qualified information is bound to the lamination code and all the electrode tab codes corresponding to the laminated core, and the laminated core is transferred to the next process.

[0033] Further, the lamination detection in S5 includes appearance detection, short circuit detection, weight detection and thickness detection.

[0034] In a second aspect, the present invention also provides a statistical system for the data of the cutting and lamination process, including:

[0035] The pole piece coding module is used to cut the positive and negative pole pieces formed by the tab forming, and sequentially code the pole pieces according to the cutting sequence;

[0036] The primary inspection module is used to perform appearance inspection and dimension inspection on the pole pieces, divide the inspection defect priorities for the inspection items, judge whether the pole pieces are qualified, and bind the inspection information to the pole piece codes;

[0037] The secondary inspection module is used to transfer the qualified pole pieces to the rectification platform for secondary dimension inspection and positioning inspection, judge whether the pole pieces are qualified, and bind the secondary inspection information to the pole piece codes;

[0038] The stacking inspection module is used to transfer the pole pieces that are qualified for the second time to the stacking table for stacking, detect the coating parameters of the pole pieces, judge whether the pole pieces are qualified, and bind the stacking inspection information to the pole piece codes;

[0039] The stacked core detection module is used to perform stacked core detection on the qualified stacked cores, judge whether the stacked cores are qualified, and bind the stacked core detection information to the stacked core codes and the corresponding pole piece codes.

[0040] In a third aspect, the present invention also provides an electronic device, including a memory and a processor, where the memory is used to store a program for supporting the processor to execute the above-mentioned data statistics method for the cutting and stacking process, and the processor is configured to execute the program stored in the memory.

[0041] In a fourth aspect, the present invention also provides a storage medium, on which a computer program is stored, and when the computer program is run by a processor, it executes the steps of the above-mentioned data statistics method for the cutting and stacking process.

[0042] The advantages of the present invention are as follows:

[0043] In the present invention, by coding the individual pole pieces and dividing the priorities of defects in different inspection items, the information obtained from the inspection of the pole pieces transferred to each stage is bound to the pole piece codes, forming a transfer information flow for each pole piece. According to the pole piece code information, the whereabouts of each pole piece can be found, and it is easier to obtain the data of the production yield of the pole pieces and the stacking yield, improving the accuracy of the data statistics for the cutting and stacking process; at the same time, when an abnormality occurs in the stacked core, all the information of the pole pieces used can be traced back in reverse using the pole piece codes, improving the accuracy of the statistics of various yields and information tracing. Description of the Drawings

[0044] Figure 1 is a flowchart of the data statistics method for the cutting and stacking process according to Embodiment 1 of the present invention;

[0045] Figure 2 is a data diagram of partial pole piece code information according to Embodiment 1 of the present invention;

[0046] Figure 3 It is a data graph of the summary of the cutting and stacking process data in the first embodiment of the present invention;

[0047] Figure 4 It is a data graph of partial pole piece coding information in the second embodiment of the present invention;

[0048] Figure 5 It is a data graph of the summary of the cutting and stacking process data in the second embodiment of the present invention. Detailed implementation manners

[0049] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0050] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings of the specification and specific embodiments:

[0051] Embodiment 1

[0052] As Figure 1 shown, specifically, the present invention discloses a method for statistically analyzing cutting and stacking process data, including the following steps:

[0053] S1. Cut the positive and negative pole pieces of the tab forming, and sequentially code the pole pieces according to the cutting order;

[0054] First, cut the positive and negative pole pieces of the tab forming, and sequentially code the positive pole pieces and the negative pole pieces respectively according to the cutting order. The coding includes a combination of at least two of the distinguishing code, pole roll code, cutting and stacking machine number, production date, shift, and cutting serial number.

[0055] In this embodiment, the distinguishing code is specifically the positive and negative pole roll distinguishing code, which is used to distinguish different polarity pole rolls. For example, the positive pole is Z and the negative pole is F; the cutting and stacking machine number is defined by two digits, such as 01-20; the production date is the cutting date, abbreviated according to the requirements in the national standard code. For example, September 1, 2024 is E91; the shift is used to distinguish the day shift and the night shift. For example, the day shift is B and the night shift is Y; the cutting serial number is 6 digits, such as 000001-999999.

[0056] S2. Perform appearance inspection and dimensional inspection on the pole pieces, divide the inspection defect priorities for the inspection items, judge whether the pole pieces are qualified, and bind the inspection information to the pole piece coding;

[0057] After the electrode sheet is manufactured, the appearance defects and dimensions of the electrode sheet are respectively detected by CCD detection technology. The priorities of the detection defects for the detection items are divided and sorted, and the following logic is used to determine whether the electrode sheet is qualified, and the detection information is bound to the electrode sheet code:

[0058] (1) When appearance defects or dimensional defects are detected in the electrode sheet, it is determined that the electrode sheet is unqualified, and the electrode sheets with detection defects exceeding the standard are scrapped. If a single appearance defect or dimensional defect is detected in the electrode sheet, the detection defect is directly bound to the electrode sheet code; if multiple defects are detected in the electrode sheet, the detection defect with the highest priority is bound to the electrode sheet code;

[0059] (2) When no appearance defects or dimensional defects are detected in the electrode sheet, it is determined that the electrode sheet is qualified, and the detection qualified information is bound to the electrode sheet code.

[0060] In this embodiment, the following logic is used to divide the priorities of the detection defects for the detection items:

[0061] (1) The priority of appearance detection is higher than that of dimensional detection;

[0062] (2) The priorities of appearance detection from high to low are unrolled, edge foil leakage, foil leakage, tape connection, scratch, bubble, black spot and white spot;

[0063] (3) The priorities of dimensional detection from high to low are electrode sheet breakage, tab folding or breakage, electrode sheet width exceeding the limit, tab width exceeding the limit, electrode sheet length exceeding the limit, tab height exceeding the limit and shoulder width exceeding the limit.

[0064] In this embodiment, the priorities of the defects are sorted according to the impact on the electrode sheet interface, electrochemical performance and safety. For example, unrolled electrode sheet, electrode sheet width exceeding the limit and tape connection will all cause abnormalities in the electrochemical performance and electrode sheet interface of the electrode sheet; for example, foil leakage, edge foil leakage, scratch, bubble, black spot and white spot of the electrode sheet will all cause long-term electrochemical performance and long-term safety risks.

[0065] Taking dimensional detection as an example, how to determine the existence of dimensional detection of the electrode sheet is described. When the damaged area of the electrode sheet > 10 mm 2 it is considered that the electrode sheet has a breakage defect; when the tab folding or breakage > 20 mm 2 it is considered that the electrode sheet has a tab folding or breakage defect; when any one of the electrode sheet width, tab width, electrode sheet length, tab height and electrode sheet shoulder width exceeds the standard value by ±0.5 mm, it is considered that the electrode sheet has this defect.

[0066] Furthermore, the defects detected by appearance inspection and dimensional inspection include but are not limited to the above inspection items. In this embodiment, the results after appearance inspection and dimensional inspection are bound to the electrode sheet code. If there are defects in the electrode sheet, operations are performed according to the above logic based on the number and priority of the detected defects, and the defects are directly scrapped after being bound to the electrode sheet code; if the electrode sheet has no defects, the qualified information is synchronously bound to the electrode sheet code and normally transferred to the rectification platform.

[0067] S3. Transfer the qualified electrode sheets to the rectification platform for secondary dimensional inspection and positioning inspection, determine whether the electrode sheets are qualified, and bind the secondary inspection information to the electrode sheet code;

[0068] After appearance inspection and dimensional inspection, the qualified electrode sheets are transferred to the rectification platform. CCD detection technology is used to perform secondary dimensional inspection and positioning inspection on the electrode sheets before stacking. The following logic is used to determine whether the electrode sheets are qualified, and the secondary inspection information is bound to the electrode sheet code:

[0069] (1) When dimensional defects or positioning defects are detected in the electrode sheet, it is determined that the electrode sheet is unqualified, and the electrode sheets with detected defects exceeding the standard are scrapped. If a single dimensional defect or positioning defect is detected in the electrode sheet, the detected defect is directly bound to the electrode sheet code; if multiple defects are detected in the electrode sheet, the detected defect with the highest priority is bound to the electrode sheet code;

[0070] (2) When no dimensional defects or positioning defects are detected in the electrode sheet, it is determined that the electrode sheet is qualified, and the secondary inspection qualified information is bound to the electrode sheet code.

[0071] (3) The priority of dimensional defects is greater than that of positioning defects.

[0072] In this embodiment, the priority of the secondary dimensional inspection in step S3 is the same as that of the dimensional inspection in step S2, which will not be elaborated here, and the defects detected by the secondary dimensional inspection include but are not limited to the above dimensional inspection items. In this embodiment, the results after inspection are bound to the electrode sheet code. If there are defects in the electrode sheet, operations are performed according to the above logic based on the number and priority of the detected defects, and the defects are directly scrapped after being bound to the electrode sheet code; if the electrode sheet has no defects, the qualified information is synchronously bound to the electrode sheet code and normally transferred to the stacking table.

[0073] In this embodiment, CCD detection technology is used to detect the angles of the four corners of the electrode sheet. If the preset positions of the vertices of the four corners of the electrode sheet are consistent with the actual positions, it is confirmed that the electrode sheet is not skewed and there are no positioning defects. Specifically, the included angle between the long side and the short side of the electrode sheet is 90±1°; otherwise, the electrode sheet is placed skewed, which affects coating, and it is considered that there are positioning defects, and the electrode sheet is scrapped.

[0074] S4. Transfer the electrode sheets that are qualified in the second inspection to the stacking table for stacking, detect the coating parameters of the electrode sheets, determine whether the electrode sheets are qualified, and bind the stacking inspection information to the electrode sheet code;

[0075] Place the secondarily qualified tabular electrodes in sequence on the stacking table for lamination. Use CCD detection technology to detect the coating parameters of the electrodes. Use the following logic to determine whether the electrodes are qualified, and bind the lamination detection information to the electrode codes:

[0076] (1) If the coating parameters of the current electrode do not meet the standard requirements, determine that the current electrode is unqualified, reject the current electrode, and replace it with the next electrode for lamination;

[0077] If the coating parameters of more than five consecutive electrodes do not meet the standard requirements, reject the entire current laminated core (the semi-finished laminated core is scrapped as a whole), and bind the rejection information to the electrode codes;

[0078] (2) If the coating parameters of the current electrode meet the standard requirements, determine that the current electrode is qualified, bind the lamination code of the current laminated core to the electrode code, and perform hot pressing.

[0079] Furthermore, the coating parameters include but are not limited to the distance from the negative electrode to the positive electrode and the distance from the separator to the negative electrode.

[0080] In this embodiment, taking the distance from the negative electrode to the positive electrode as an example, it is described whether the coating parameters of the electrode meet the standard requirements. In the length direction of the electrode, on the side of the negative electrode tab: the negative electrode material area exceeds the positive electrode material area by 2.0 ± 1.0 mm; on the side of the positive electrode tab: the negative electrode material area exceeds the positive electrode material area by 1.5 ± 0.5 mm; in the width direction of the electrode, the negative electrodes on both sides exceed the positive electrode by 1.0 ± 0.5 mm.

[0081] In this embodiment, the normal electrodes are placed on the stacking table in the order of tabular electrodes. The CCD detects the coating parameters. The coating parameters are not limited to the distance from the negative electrode to the positive electrode and the distance from the separator to the negative electrode. If it is detected that the coating parameters corresponding to the current electrode do not meet the standard requirements, this electrode is rejected and replaced with the next electrode for lamination. If more than 5 consecutive electrodes are detected to exceed the standard, the semi-finished laminated core that has been laminated is scrapped as a whole, and the rejection information is bound to all the electrodes included in the semi-finished laminated core; if there is no abnormality, the complete laminated core continues to flow.

[0082] S5. Perform lamination detection on the qualified laminated cores to determine whether the laminated cores are qualified, and bind the lamination detection information to the lamination codes and the corresponding electrode codes;

[0083] The qualified laminated cores are complete laminated cores. There is a lamination two-dimensional code (lamination code) on the laminated cores. By performing lamination detection on the qualified laminated cores, use the following logic to determine whether the laminated cores are qualified, and bind the lamination detection information to the lamination codes and the corresponding electrode codes:

[0084] (1) When the laminated core is unqualified, bind the unqualified information to the lamination code and all the electrode codes corresponding to the laminated core;

[0085] (2) When the stacked core is qualified, bind the qualified information to the stacked core code and all the electrode tab codes corresponding to the stacked core, and the stacked core is transferred to the next process.

[0086] Further, the inspection of the stacked core includes appearance inspection, short-circuit inspection, weight inspection and thickness inspection.

[0087] In this embodiment, the appearance inspection is performed using a CCD camera, the short-circuit inspection is performed using a pulse short-circuit tester, the weight inspection is performed using an independent electronic platform scale, and the thickness inspection is performed using a distance sensor. This embodiment describes whether the stacked core inspection is qualified. The appearance inspection should meet the requirements that the diaphragm of the stacked core is not folded or damaged, and the tape and the two-dimensional code are not missed or skewed; the short-circuit inspection should meet the actual test parameter data requirements: voltage 100±5V, TK 70ms, TF200ms, and the measured voltage drop data requirements during the boosting, pressure-holding, and free discharge processes need to meet Vd1≤3.5%, Vd2≤9%, Vd3≤9%; the weight inspection should meet the requirement that the weight of the stacked core is 2588g±20g; the thickness inspection should meet the requirement that the thickness of the stacked core is 18.45mm±0.4mm.

[0088] In this embodiment, the electrode tabs are cut and stacked according to the above process. The number of positive and negative electrode tab layers of the stacked core is 20 layers and 21 layers. Some data of the cutting and stacking process are summarized as Figure 2 shown. Define that the electrode tab code is composed of the positive and negative electrode roll differentiation code, the cutting and stacking machine number, the cutting and stacking production date, the shift, and the cutting serial number in sequence. First, perform appearance inspection and dimensional inspection on the electrode tabs. If there are appearance defects or dimensional defects in the electrode tabs, the electrode tabs are directly scrapped, and at the same time, the defect information is bound to the electrode tab code, while the qualified electrode tabs also bind the qualified information to the electrode tab code; then perform secondary dimensional inspection and positioning inspection on the electrode tabs on the rectification platform. If the electrode tabs are qualified, the qualified information is synchronously bound to the electrode tab code; then stack the electrode tabs. If the coating parameters of the electrode tabs do not meet the standard requirements, the current electrode tab is directly scrapped, and the next electrode tab is replaced and stacked. The qualified electrode tabs bind the stacked core code of the current stacked core to the electrode tab code and perform hot pressing to form a complete stacked core; finally, perform inspection on the complete stacked core. If it is unqualified, bind the unqualified information to the stacked core code and all the electrode tab codes corresponding to the stacked core. If it is qualified, bind the qualified information to the stacked core code and all the electrode tab codes corresponding to the stacked core, and the stacked core is transferred to the next process. Through the above individual electrode tab information, the following summary data can be obtained synchronously as Figure 3 shown, and the proportion of each type of defect and the actual utilization of the electrode tabs can be clearly calculated.

[0089] In this embodiment, by encoding individual electrode sheets and prioritizing defects for different inspection items, the information obtained from the inspection at each stage of the electrode sheet transfer is bound to the electrode sheet code, forming the transfer information flow of each electrode sheet. According to the electrode sheet code information, the whereabouts of each electrode sheet can be found, making it easier to obtain the data of the production yield of the electrode sheets and the lamination yield, and improving the accuracy of the data statistics in the cutting and lamination process. At the same time, when an abnormality occurs in the stacked core, all the information of the electrode sheets used can be traced back in reverse using the electrode sheet code, improving the accuracy of the statistics of various yields and information traceability.

[0090] Embodiment 2

[0091] As Figure 1 shown, in this embodiment, the data statistics method for the cutting and lamination process includes the following specific implementation steps:

[0092] S1’. After cutting the positive and negative electrode sheets with formed tabs, encode them.

[0093] First, cut the positive and negative electrode sheets with formed tabs, and then encode the positive electrode sheets and negative electrode sheets in sequence according to the cutting order. The encoding includes a combination of at least two of the distinguishing code, coil code, cutting and lamination machine number, production date, shift, and cutting serial number.

[0094] The distinguishing code is specifically the positive and negative coil distinguishing code for distinguishing different polarity coils. For example, Z is for the positive pole and F is for the negative pole. The coil code is specifically the positive and negative coil batch code, which is defined as 4 digits according to the production code. For example, MD11. The cutting and lamination machine number is defined by two digits. For example, 01-20. The production date is the cutting and lamination date, which is abbreviated according to the requirements in the national standard code. For example, September 1, 2024 is E91. The shift is used to distinguish the day shift and the night shift. For example, B is for the day shift and Y is for the night shift. The cutting serial number is 6 digits. For example, 000001-999999.

[0095] In this embodiment, it is defined that the electrode sheet code consists of the positive and negative coil distinguishing code, the positive and negative coil batch code, the cutting and lamination machine number, the cutting and lamination production date, the shift, and the cutting serial number in sequence.

[0096] S2’. Conduct appearance inspection and dimension inspection on the electrode sheets, divide the defect priorities for the inspection items, and reject those with defective inspections exceeding the standards according to the priorities and bind the electrode sheet codes.

[0097] In this embodiment, after the pole piece is manufactured, CCD detection is performed to detect appearance defects and pole piece dimensions respectively. The priority of appearance detection is higher than that of dimension detection. The specific priority of appearance detection is: unrolled > edge foil leakage > foil leakage > tape connection > scratch > bubble > black spot > white spot; the specific priority of dimension detection is: pole piece breakage > tab folding or breakage > pole piece width exceeding limit > tab width exceeding limit > pole piece length exceeding limit > tab height exceeding limit > shoulder width exceeding limit. Appearance and dimension defects include but are not limited to the above detection items. When a single appearance defect or dimension defect is detected in the pole piece, it is recorded, and the defect information is bound to the pole piece code; if multiple defects are detected in a single pole piece, according to the priority, only the defect name with the highest priority is bound; if the detected pole piece has defects, it is scrapped, and the waste position is bound to the pole piece code synchronously. If the pole piece has no defects, it will flow normally.

[0098] S3’. After appearance and dimension detection, the pole piece flows to the rectification platform for secondary dimension detection and positioning detection. Pole pieces with defects exceeding the standard during detection are scrapped and the pole piece code is bound.

[0099] In this embodiment, on the rectification platform, CCD detection is performed to position and detect the dimensions of the pole piece before stacking. The specific priority of dimension detection is: pole piece breakage > tab folding or breakage > pole piece width exceeding limit > tab width exceeding limit > pole piece length exceeding limit > tab height exceeding limit > shoulder width exceeding limit. Dimension defects include but are not limited to the above detection items. When a single appearance defect or dimension defect is detected in the pole piece, it is recorded, and the defect information is bound to the pole piece code; if multiple defects are detected in a single pole piece, according to the priority, only the defect name with the highest priority is bound; if the detected pole piece has defects, it is scrapped, and the waste position is bound to the pole piece code synchronously. If the pole piece has no defects, it will flow normally.

[0100] S4’. The pole piece flows to the stacking table to detect the coating parameters. Pole pieces that exceed the standard are scrapped. If more than five consecutive pole pieces exceed the standard, the entire semi-finished stacked core that has been stacked is scrapped, and the pole piece code is bound.

[0101] In this embodiment, normal pole pieces are placed on the stacking table in the order of the stacked core pole pieces. The coating parameters of the pole pieces are detected by CCD. The coating parameters include but are not limited to the distance from the negative electrode to the positive electrode and the distance from the separator to the negative electrode. If it is detected that the coating parameters corresponding to the current pole piece do not meet the standard requirements, this pole piece is scrapped and the next pole piece is replaced for stacking. If more than 5 consecutive pieces are detected to exceed the standard, the entire semi-finished stacked core that has been stacked is scrapped, and the waste information and position are bound to all the pole pieces included in the semi-finished stacked core; if there is no abnormality, the complete stacked core continues to flow.

[0102] S5’. After the complete stacked core is pasted with a QR code, the QR code is bound to the codes of the included pole pieces, and stacking core detection is performed, and the detection information of the stacking core is bound synchronously. The stacking core detection includes appearance detection, short circuit detection, weight detection and thickness detection.

[0103] In this embodiment, the pole pieces are cut and stacked according to the above process. The number of positive and negative pole pieces in the stacked core is the same as that in Embodiment 1. Some data of the cutting and stacking process are summarized as Figure 4 shown. It is defined that the pole piece code consists of the positive and negative pole coil discrimination code, the positive and negative coil batch code, the cutting and stacking machine number, the cutting and stacking production date, the shift, and the cutting serial number. First, the appearance and size of the pole piece are detected. If there are appearance defects or size defects in the pole piece, the pole piece is directly scrapped, and at the same time, the defect information is bound to the pole piece code. For qualified pole pieces, the qualified information is also bound to the pole piece code. Then, the pole piece is subjected to secondary size detection and positioning detection on the rectification platform. If the pole piece is qualified, the qualified information is synchronously bound to the pole piece code. Then, the pole piece is stacked. When the coating parameters of more than 5 consecutive pole pieces do not meet the standard requirements, the current incomplete stacked core as a whole is scrapped, and the next pole piece is replaced for stacking. For qualified pole pieces, the stacked core code of the current stacked core is bound to the pole piece code, and hot pressing is performed to form a complete stacked core. Finally, the complete stacked core is subjected to stacked core detection. If it is unqualified, the unqualified information is bound to the stacked core code and all the pole piece codes corresponding to the stacked core. If it is qualified, the qualified information is bound to the stacked core code and all the pole piece codes corresponding to the stacked core, and the stacked core is transferred to the next process. Through the above individual pole piece information, the following summary information can be obtained synchronously as Figure 5 shown.

[0104] Embodiment Three

[0105] The present invention also discloses a statistical system for cutting and stacking process data, including a pole piece coding module, a primary inspection module, a secondary inspection module, a stacking inspection module, and a stacked core detection module;

[0106] The pole piece coding module is used to cut the positive and negative pole pieces with formed tabs, and code the pole pieces in sequence according to the cutting order;

[0107] The positive and negative pole pieces with formed tabs are first cut, and the positive and negative pole pieces are coded in sequence according to the cutting order. The coding includes at least two combinations of the discrimination code, the pole coil code, the cutting and stacking machine number, the production date, the shift, and the cutting serial number.

[0108] The primary inspection module is used to perform appearance detection and size detection on the pole piece, divide the detection defect priorities for the detection items, judge whether the pole piece is qualified, and bind the detection information to the pole piece code;

[0109] After the pole piece is manufactured, the appearance defects and dimensions of the pole piece are respectively detected by CCD detection technology. The priorities of the detection defects for the detection items are divided and sorted. The following logic is used to judge whether the pole piece is qualified, and the detection information is bound to the pole piece code:

[0110] When the appearance defect or size defect of the electrode sheet is detected, it is determined that the electrode sheet is unqualified, and the electrode sheet with detected defects exceeding the standard is scrapped. If a single appearance defect or size defect is detected on the electrode sheet, the detected defect is directly bound to the electrode sheet code; if multiple defects are detected on the electrode sheet, the detected defect with the highest priority is bound to the electrode sheet code;

[0111] When no appearance defect or size defect is detected on the electrode sheet, it is determined that the electrode sheet is qualified, and the detected qualified information is bound to the electrode sheet code.

[0112] In this embodiment, the following logic is used to represent the detection defect priority for the detection items:

[0113] The appearance detection priority is higher than the size detection priority;

[0114] The appearance detection priorities from high to low are unrolled, edge foil leakage, foil leakage, tape joint, scratch, bubble, black spot and white spot;

[0115] The size detection priorities from high to low are electrode sheet breakage, tab folding or breakage, electrode sheet width exceeding the limit, tab width exceeding the limit, electrode sheet length exceeding the limit, tab height exceeding the limit and shoulder width exceeding the limit.

[0116] Further, the defects detected by appearance detection and size detection include but are not limited to the above detection items. In this embodiment, the results after appearance detection and size detection are bound to the electrode sheet code. If there are defects on the electrode sheet, according to the number and priority of the detected defects, the operations are performed according to the above logic, and the defects are bound to the electrode sheet code and then directly scrapped; if there are no defects on the electrode sheet, the qualified information is synchronously bound to the electrode sheet code and normally transferred to the rectification platform.

[0117] The secondary inspection module is used to transfer the qualified electrode sheets to the rectification platform for secondary size detection and positioning detection, determine whether the electrode sheets are qualified, and bind the secondary detection information to the electrode sheet code;

[0118] After appearance detection and size detection, the qualified electrode sheets are transferred to the rectification platform. The CCD detection technology is used to perform secondary size detection and positioning detection on the electrode sheets before laminating. The following logic is used to determine whether the electrode sheets are qualified, and the secondary detection information is bound to the electrode sheet code:

[0119] When a size defect or positioning defect is detected on the electrode sheet, it is determined that the electrode sheet is unqualified, and the electrode sheet with detected defects exceeding the standard is scrapped. If a single size defect or positioning defect is detected on the electrode sheet, the detected defect is directly bound to the electrode sheet code; if multiple defects are detected on the electrode sheet, the detected defect with the highest priority is bound to the electrode sheet code;

[0120] When no size defect or positioning defect is detected on the electrode sheet, it is determined that the electrode sheet is qualified, and the secondary detection qualified information is bound to the electrode sheet code;

[0121] The priority of dimensional defects is higher than that of positioning defects.

[0122] In this embodiment, the priority of the secondary dimensional inspection in the secondary inspection module is the same as that of the dimensional inspection in the primary inspection module, which will not be elaborated here. And the defects detected by the secondary dimensional inspection include but are not limited to the above-mentioned dimensional inspection items. In this embodiment, the detected results are bound to the pole piece code. If there are defects in the pole piece, according to the number and priority of the detected defects, operate according to the above logic, bind the defects to the pole piece code and directly scrap them; if there are no defects in the pole piece, synchronize and bind the qualified information to the pole piece code and transfer it to the stacking table normally.

[0123] The laminating inspection module is used to transfer the pole pieces that pass the secondary inspection to the stacking table for lamination, detect the coating parameters of the pole pieces, judge whether the pole pieces are qualified, and bind the lamination detection information to the pole piece code;

[0124] Place the laminated pole pieces of the pole pieces that pass the secondary inspection on the stacking table in sequence for lamination. Use the CCD detection technology to detect the coating parameters of the pole pieces. Use the following logic to judge whether the pole pieces are qualified, and bind the lamination detection information to the pole piece code:

[0125] If the coating parameters of the current pole piece do not meet the standard requirements, judge that the current pole piece is unqualified, scrap the current pole piece, and replace it with the next pole piece for lamination;

[0126] If the coating parameters of more than five consecutive pole pieces do not meet the standard requirements, scrap the entire current laminated core (the semi-finished laminated core is scrapped as a whole), and bind the scrap information to the pole piece code;

[0127] If the coating parameters of the current pole piece meet the standard requirements, judge that the current pole piece is qualified, bind the laminated core code of the current laminated core to the pole piece code, and perform hot pressing.

[0128] Furthermore, the coating parameters include but are not limited to the distance from the negative electrode to the positive electrode and the distance from the separator to the negative electrode.

[0129] In this embodiment, the normal pole pieces are placed on the stacking table in the order of laminated pole pieces, and the CCD detects the coating parameters. The coating parameters are not limited to the distance from the negative electrode to the positive electrode and the distance from the separator to the negative electrode. If it is detected that the coating parameters corresponding to the current pole piece do not meet the standard requirements, scrap this piece and replace it with the next pole piece for lamination. If more than 5 consecutive pieces are detected to exceed the standard, scrap the semi-finished laminated core that has been laminated as a whole, and bind the scrap information to all the pole pieces included in the semi-finished laminated core; if there is no abnormality, the complete laminated core continues to flow.

[0130] The laminated core detection module is used to perform laminated core detection on the qualified laminated cores, judge whether the laminated cores are qualified, and bind the laminated core detection information to the laminated core code and the corresponding pole piece code;

[0131] A qualified stacked core is a complete stacked core, on which a stacked core QR code (stacked core code) is set. By performing stacked core detection on the qualified stacked core, the following logic is used to determine whether the stacked core is qualified, and the stacked core detection information is bound to the stacked core code and the corresponding pole piece code:

[0132] When the stacked core is unqualified, the unqualified information is bound to the stacked core code and all the pole piece codes corresponding to the stacked core;

[0133] When the stacked core is qualified, the qualified information is bound to the stacked core code and all the pole piece codes corresponding to the stacked core, and the stacked core is transferred to the next process.

[0134] Further, the stacked core detection includes appearance detection, short circuit detection, weight detection, and thickness detection.

[0135] Embodiment 4

[0136] The present invention also discloses a device, including a memory and a processor. The memory is used to store a program that supports the processor to execute the method for statistical analysis of the cutting and stacking process data in Embodiment 1, 2, or 3, and the processor is configured to execute the program stored in the memory.

[0137] Embodiment 5

[0138] The present invention also discloses a storage medium, on which a computer program is stored. When the computer program is run by a processor, it executes the steps of the method for statistical analysis of the cutting and stacking process data in Embodiment 1, 2, or 3.

[0139] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A cutting and stacking process data statistical method, characterized in that: The following steps are involved: S1. Cut the positive and negative electrode sheets with formed tabs, and encode the electrode sheets in sequence according to the cutting order; S2. Perform appearance inspection and size inspection on the pole piece, prioritize the inspection defects according to the inspection items, determine whether the pole piece is qualified, and bind the inspection information to the pole piece code; S3, transfer the qualified pole piece to the correction platform for secondary size detection and positioning detection, determine whether the pole piece is qualified, and bind the secondary detection information to the pole piece code; S4, transferring the second qualified electrode to the stacking station for stacking, detecting the electrode coating parameters, judging whether the electrode is qualified, and binding the stacking detection information to the electrode code; S5. Perform a core stacking test on the qualified core stacks to determine whether the core stacks are qualified, and bind the core stacking test information to the core stacking code and the corresponding pole piece code.

2. The cutting and stacking process data statistics method according to claim 1, characterized in that: The code in S1 includes a combination of at least two of a distinguishing code, a pole roll code, a cutting and stacking machine number, a production date, a shift, and a cutting sequence number.

3. The cutting and stacking process data statistics method according to claim 1, characterized in that: The defect detection priority described in S2 includes appearance detection priority and size detection priority; The appearance detection priority is greater than the size detection priority; The appearance inspection priorities are, from high to low, non-rolling, edge foil leakage, foil leakage, tape connection, scratches, bubbles, black spots and white spots; The priority of the size detection is from high to low as follows: pole piece damage, pole ear folding or damage, pole piece width exceeding the limit, pole ear width exceeding the limit, pole piece length exceeding the limit, pole ear height exceeding the limit and shoulder width exceeding the limit.

4. The cutting and stacking process data statistics method according to claim 3, characterized in that: In S2, the following logic is used to determine whether the electrode is qualified and to bind the detection information to the electrode code: When the electrode is detected with appearance defects or size defects, the electrode is judged as unqualified, and the electrode with detection defects exceeding the standard is discarded. If a single appearance defect or size defect is detected on the electrode, the detection defect is directly bound to the electrode code; If multiple defects are detected on the electrode, the highest priority defect is bound to the electrode code; When no appearance defects or size defects are detected in the electrode, the electrode is judged to be qualified, and the qualified detection information is bound to the electrode code.

5. The cutting and stacking process data statistics method according to claim 3, characterized in that: In S3, the following logic is used to determine whether the electrode is qualified, and the secondary detection information is bound to the electrode code: When a size defect or positioning defect is detected on a pole piece, the pole piece is judged as unqualified, and the pole piece with a detection defect exceeding the standard is discarded. If a single size defect or positioning defect is detected on a pole piece, the detection defect is directly bound to the pole piece code; If multiple defects are detected on the electrode, the highest priority defect is bound to the electrode code; When no size defect or positioning defect is detected in the electrode, the electrode is judged to be qualified, and the secondary inspection qualified information is bound to the electrode code; Size defects have higher priority than positioning defects.

6. The cutting and stacking process data statistics method according to claim 1, characterized in that: In S4, the following logic is used to determine whether the electrode is qualified, and the lamination detection information is bound to the electrode code: If the coating parameters of the current electrode sheet do not meet the standard requirements, the current electrode sheet is judged to be unqualified, the current electrode sheet is discarded, and the next electrode sheet is replaced; If the coating parameters of more than five consecutive electrodes do not meet the standard requirements, the entire current stack will be discarded, and the discarding information will be bound to the electrode code; If the coating parameters of the current electrode meet the standard requirements, the current electrode is judged to be qualified, and the core stacking code of the current core stack is bound to the electrode code for hot pressing.

7. The cutting and stacking process data statistics method according to claim 1, characterized in that: In S5, the following logic is used to determine whether the core stack is qualified, and the core stack detection information is bound to the core stack code and the corresponding pole piece code: When the stacked core fails to meet the standards, the failure information will be bound to the stacked core code and all the pole piece codes corresponding to the stacked core; When the core stack is qualified, the qualified information is bound to the core stack code and all the pole piece codes corresponding to the core stack, and the core stack is transferred to the next process.

8. A statistical system for cutting and stacking process data, characterized in that: include: The pole piece coding module is used to cut the positive and negative pole pieces after the pole ear is formed, and encode the pole pieces in sequence according to the cutting order; The primary inspection module is used to perform appearance inspection and size inspection on the pole piece, prioritize the inspection defects according to the inspection items, determine whether the pole piece is qualified, and bind the inspection information to the pole piece code; The secondary inspection module is used to transfer qualified pole pieces to the correction platform for secondary size inspection and positioning inspection, determine whether the pole pieces are qualified, and bind the secondary inspection information to the pole piece code; The stacking inspection module is used to transfer the second qualified pole pieces to the stacking platform for stacking, detect the coating parameters of the pole pieces, determine whether the pole pieces are qualified, and bind the stacking inspection information to the pole piece code; The core stacking detection module is used to perform core stacking detection on qualified core stacking, determine whether the core stacking is qualified, and bind the core stacking detection information to the core stacking code and the corresponding pole piece code.

9. An electronic device, comprising a memory and a processor, characterized in that: The memory is used to store a program that supports the processor to execute the cutting and stacking process data statistics method according to any one of claims 1 to 7, and the processor is configured to execute the program stored in the memory.

10. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the stacking process data statistics method according to any one of claims 1 to 7 are executed.

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