Roll image generation system and roll image generation method

Abstract

According to an exemplary embodiment, a roll graph generation method is provided. The method comprises the steps of: cutting a cutting site of an electrode sheet moving between an unwinder and a rewinder, thereby providing a first batch; and identifying a calibration section of the electrode sheet, where the calibration section is located between a portion of the electrode sheet sensed by the sensing unit when the electrode sheet is cut and the cut portion of the electrode sheet.

Description

Technical Field

[0001] The present invention relates to a roll map generation system and a roll map generation method, the roll map generation system being configured to generate a roll map indicating a batch, which is a unit of a wound electrode sheet. This application claims the benefit of priority based on Korean Patent Application No. 10-2023-0092808 filed on July 18, 2023, and the entire contents of the Korean Patent Application are incorporated herein by reference. Background Art

[0002] Unlike primary batteries, secondary batteries can be charged and discharged multiple times. Secondary batteries have been widely used as energy sources for various types of wireless devices (such as handheld devices, laptops, and cordless vacuum cleaners). Recently, the main use of secondary batteries has evolved from mobile devices to mobility, because the manufacturing cost per unit capacity of secondary batteries has been significantly reduced due to improved energy density and economies of scale, and the cruising range of battery electric vehicles (BEVs) has increased to the same level as fuel vehicles.

[0003] Secondary batteries are manufactured through electrode processes, assembly processes, and activation processes. Among these processes, the electrode process is a key process that determines the yield and performance of the battery cell. The electrode process may include a coating process, a rolling process, and a slitting process. In the coating process, active materials and insulating materials may be applied to the surface of the current collector. In the rolling process, the electrode may be pressed by a pressing roller. In the rolling process, the density, performance, and surface quality of the electrode may be determined. In the slitting process, the electrode may be cut into multiple electrodes according to the design of the battery cell. Summary of the invention

[0004] Technical issues

[0005] The present invention is directed to providing a system configured to generate a reel map including information about quality and defects in an electrode manufacturing process.

[0006] Technical Solution

[0007] An exemplary embodiment of the present invention provides a method for generating a roll map, comprising: cutting a cutting portion of an electrode sheet to provide a first batch, the electrode sheet moving between an unwinder and a rewinder; and identifying a calibration section of the electrode sheet, wherein the calibration section is located between a portion of the electrode sheet sensed by a sensing portion when the electrode sheet is cut and the cutting portion of the electrode sheet.

[0008] A batch identifier (ID) of the data collected from the calibration segment may be indicative of the first batch.

[0009] The roll map generation system may further include assigning data collected from the calibration section to a roll map of a second batch subsequent to the first batch.

[0010] Assigning the data to a volume map of a second batch following the first batch may include setting a batch identifier (ID) of the data to indicate the second batch.

[0011] The roll map generation system may further include calibrating coordinates of data collected from the calibration section.

[0012] The lower limit of the coordinates of the data collected from the calibration section may be the completed length of the first batch.

[0013] The coordinates of the data may be based on the completed length calibration.

[0014] The coordinates of the data may be calibrated based on subtracting the completed length.

[0015] An upper limit of the coordinates of the data may be a sum of the completion length and an offset length, and the offset length is a length of the electrode sheet between the sensing portion and the winder.

[0016] An exemplary embodiment of a roll map generation method is provided. The roll map generation method includes: cutting a cutting portion of an electrode sheet to provide a first batch, the electrode sheet moving between an unwinder and a rewinder; and identifying a calibration section of the electrode sheet, wherein the calibration section is located between a portion of the electrode sheet processed by a processing device when the electrode sheet is cut and the cutting portion of the electrode sheet.

[0017] The volume map generation method may further include assigning device data collected from the processing device to a volume map of a second batch subsequent to the first batch.

[0018] The volume map generation method may further include calibrating the coordinates of the data collected from the calibration section.

[0019] The lower coordinate limit of the data collected from the calibration section may be the completed length of the first batch.

[0020] The coordinates of the data may be based on the completed length calibration.

[0021] An upper limit of the coordinates of the data may be a sum of the completion length and an offset length, wherein the offset length is a length of the electrode sheet between the processing device and the rewinder.

[0022] Beneficial Effects

[0023] According to an exemplary embodiment of the present invention, a system for generating a roll map that enables feedback, feedforward, and tracking of an electrode process may be provided.

[0024] The effects that can be achieved according to the exemplary embodiments of the present invention are not limited to the above-mentioned effects, and other effects not described herein will be clearly derived and understood from the following description by those of ordinary skill in the art to which the exemplary embodiments of the present invention belong. That is, those of ordinary skill in the art can derive from the exemplary embodiments of the present invention the unexpected effects achieved when implementing the exemplary embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A volume map generation system according to an exemplary embodiment is shown.

[0026] Figure 2 is a flow chart of a volume map generation method according to an exemplary embodiment.

[0027] Figure 3 is a diagram for describing a volume map generating method according to an exemplary embodiment. DETAILED DESCRIPTION

[0028] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Before describing the embodiments of the present invention, the terms or expressions used in this specification and claims should not be interpreted as limited to those commonly understood or defined in commonly used dictionaries, and should be understood based on the meaning and concept corresponding to the present invention based on the inventor of the present application who can appropriately define the terms or expressions to best explain the principles of the present invention.

[0029] Therefore, the embodiments described herein and the configurations shown in the accompanying drawings are merely embodiments of the present invention and do not reflect all technical ideas of the present invention. Therefore, it should be understood that various equivalent examples and modifications of alternative configurations already exist on the filing date of this application.

[0030] When it is determined that well-known configurations or functions related to describing the present invention will obscure the subject matter of the present invention due to unnecessary detail, such well-known configurations or functions are not described in detail.

[0031] Since the embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art, the shapes, sizes, etc. of the components shown in the drawings may be exaggerated, omitted, or schematically illustrated for clarity. Therefore, it should not be understood that the sizes or ratios of the components fully reflect their actual sizes or ratios.

[0032] (First Embodiment)

[0033] Figure 1 A roll map generation system 100 is shown according to an exemplary embodiment.

[0034] refer to Figure 1 The roll image generation system 100 may include an unwinder 111, a rewinder 113, a processing device 115, a cutter 117, a first rotary encoder 121, a second rotary encoder 123, a measuring device 131, an inspector 133, a first controller 141, a second controller 143, a communication server 150 and a server 160.

[0035] The roll map generation system 100 can be configured to generate a roll map including data about the electrode sheet ES. The roll map can represent the electrode sheet ES based on coordinates indicating positions on the electrode sheet ES. A secondary battery manufacturing process can be performed on the electrode sheet ES. The roll map can include data representing the history of the process performed on the electrode sheet ES and related to the coordinates. Therefore, the roll map enables feedback, feedforward, and tracking of the secondary battery manufacturing process (described below).

[0036] The first electrode roll ER1 subjected to the previous process may be loaded on the unwinder 111. The unwinder 111 may be configured to unwind the electrode sheet ES from the first electrode roll ER1. The rewinder 113 may be configured to rewind the electrode sheet ES to form the second electrode roll ER2. Therefore, the electrode sheet ES may be moved between the unwinder 111 and the rewinder 113. The electrode process is performed on the electrode sheet ES unwound from the first electrode roll ER1 and wound into the second electrode roll ER2, so it may be a roll-to-roll process.

[0037] The roll diagram can be generated in batches. The electrode sheet ES can be wound into a second electrode roll ER2 and cut and separated by a cutter 117 after reaching a certain winding length. A batch is a production unit of a roll-to-roll process, and the separated second electrode roll ER2 is an embodiment of a batch. Therefore, the server 160 can be configured to store a roll diagram of a previous process. The roll diagram of the previous process can correspond to the first electrode roll ER1. In addition, the server 160 can generate and store a roll diagram of the current process. The roll diagram of the current process can correspond to the second electrode roll ER2.

[0038] In the roll graph, time series data constructed over time (ie, according to the progress of a process) may be correlated with coordinate data CD collected based on the movement amount (ie, the winding amount or the unwinding amount) of the electrode sheet.

[0039] The manufacture of secondary batteries involves a series of different processes, and the previous process affects the subsequent process. In this case, when the time series data of the previous process does not directly match the workpieces, intermediate products and products of the real world, it is difficult to reflect the time series data of the previous process in the subsequent process. Hereinafter, correcting the subsequent process based on the data generated according to the results of the previous process will be referred to as feedforward.

[0040] Here, the workpiece is a product provided as a result of each process, for example, a coating process, a rolling process, and a slitting process. Figure 1 The intermediate product may be an electrode, a diaphragm cut by a slotting process, and one of its components. The intermediate product may be a structure including a housing and an electrode assembly included in the housing (in some cases, the structure also includes an electrolyte). The product is a product processed into a secondary battery by an activation process. The above definitions of workpieces, intermediate products, and products are only definitions thereof in one aspect and should not be understood as excluding their general definitions.

[0041] For feedforward, the time series data of the roll map should be related to the positions on the real-world workpieces, components, intermediate products, and products. The roll map can allow the time series data to be related to coordinate data, which includes the coordinates of the positions on the real-world workpieces, components, intermediate products, and products. The roll map can provide a match between the time series data and the real-world workpieces, components, intermediate products, and products based on the coordinate data. Therefore, the feedforward and roll map generated based on the roll map can improve the productivity and quality of the secondary battery manufacturing process by digitizing and concretizing various aspects of the process that depend on the operator's judgment. The roll map of the previous batch can be used to improve the process of the subsequent batch, and this operation can be called process feedback. Process feedback using the roll map can include identifying process conditions and process parameters that cause problems and defects based on the data included in the roll map.

[0042] In addition, as described below, roll graphs can be cumulatively generated for workpieces, intermediate products, and products of unit processes to track the process history of products on the market (e.g., battery cells, battery modules, or battery packs). For example, a battery cell may include a cell identifier (ID) on an electrode assembly or a housing. The cell ID may include batch numbers and coordinate information of electrodes and diaphragms included in the battery cell. In other words, the cell ID may be associated with a roll graph of electrodes and diaphragms included in the battery cell. Therefore, when an event (such as a quality problem) occurs in a battery cell that has been shipped, historical data on the manufacture of the battery cell can be retrieved based on the cell ID to identify the cause of the problem in the manufacture of the battery cell.

[0043] The electrode sheet ES may be processed by the processing device 115. For example, the processing device 115 may include a coater, and the electrode sheet ES may be coated with an electrode slurry. As another embodiment, the processing device 115 may include an induction heating device and a pressing roller, and a rolling process may be performed on the electrode sheet ES coated with the electrode slurry. As another embodiment, the processing device 115 may include a splicing mold and a waste port, and a portion of the electrode sheet ES may be discarded. As another embodiment, the processing device 115 may include a slitting knife, and the electrode sheet ES may be divided into a plurality of electrode sheets.

[0044] The coating process is a process of applying a coating material such as an electrode slurry to the electrode sheet ES. The electrode slurry may include an electrode active material, a conductive agent, a binder, and a solvent. The electrode slurry may be provided by dissolving the electrode active material, the conductive agent, the binder, etc. in a solvent.

[0045] The rolling process is a process of passing the electrode sheet ES coated with the electrode slurry between pressing rollers facing each other. By using the pressing rollers, the surface of the electrode can be flattened and the bonding force between the active material and the current collector can be increased.

[0046] The coating process and the rolling process are performed on the electrode sheet ES having a wide width to increase the output (eg, GWh) per production line of the secondary battery production equipment. Thereafter, in the slitting process, the electrode sheet having a wide width may be cut according to the specifications of the battery cell.

[0047] The first rotary encoder 121 may be configured to sense the amount of the electrode sheet ES unwound from the first electrode roll ER1 by the unwinder 111. Therefore, the first rotary encoder 121 may be configured to generate an unwinding amount signal UWAS indicating the unwinding amount of the electrode sheet ES. The first rotary encoder 121 may be configured to transmit the unwinding amount signal UWAS to the first controller 141. The first controller 141 may be configured to collect unwinding amount data based on the unwinding amount signal UWAS of the electrode sheet ES.

[0048] The second rotary encoder 123 may be configured to sense the amount of the electrode sheet ES wound into the second electrode roll ER2 by the rewinder 113. Therefore, the second rotary encoder 123 may be configured to generate a winding amount signal WAS indicating the winding amount of the electrode sheet ES. The second rotary encoder 121 may be configured to transmit the winding amount signal WAS to the first controller 141. The first controller 141 may be configured to collect winding amount data based on the winding amount signal WAS of the electrode sheet ES.

[0049] In some cases, a portion of the electrode sheet ES may be discarded, and thus the amount of the electrode sheet ES unwound by the unwinder 111 may be different from the amount of the electrode sheet ES wound by the rewinder 113. When the electrode sheet ES is elongated due to pressure in the rolling process, the amount of the electrode sheet ES unwound by the unwinder 111 may be different from the amount of the electrode sheet ES wound by the rewinder 113.

[0050] The first controller 141 can be configured to collect coordinate data CD of the electrode sheet ES based on one of the winding amount signal WAS and the unwinding amount signal UWAS of the electrode sheet ES. For example, the first controller 141 can determine the moving distance of the electrode sheet ES in the current process step based on the winding amount signal WAS of the electrode sheet ES. Therefore, the coordinates indicating the position of the portion of the electrode sheet ES to be wound by the winder 113 on the electrode sheet ES can be determined at each time point when the roll-to-roll process is performed on the electrode sheet ES. In addition, by calibrating the coordinates using the offset lengths OD1, OD2, and OD3, the relative positions of the processing parts or sensing parts on the electrode sheet ES can be identified. Hereinafter, the technical concept of the present invention will be described with respect to an embodiment in which the first controller 141 collects coordinate data CD based on the winding amount signal WAS of the electrode sheet ES.

[0051] The coordinate data CD may include coordinates matched to each part of the electrode sheet ES. That is, each of the arbitrary points on the electrode sheet ES may match the coordinates. The coordinates may be one-dimensional (1D) quantities in the machine direction (or longitudinal direction) of the electrode sheet ES, but are not limited thereto. The coordinates may be two-dimensional (2D) quantities in the machine direction and transverse direction (or width direction) of the electrode sheet ES.

[0052] The sensing portion 131S of the measuring device 131 may be configured to measure the electrode sheet ES to collect measurement data of the electrode sheet ES. The sensing portion 131S may measure the electrode sheet ES by means of a scanning method. The sensing portion 131S may be configured to scan the electrode sheet ES in a transverse direction. When the measuring device 131 scans in the transverse direction, the electrode sheet ES may be moved in a longitudinal direction by means of the unwinder 111 and the rewinder 113.

[0053] The measurement data may include multiple measurement values ​​represented by numbers. For example, the measurement data may include dimensional data (e.g., the thickness and width of the electrode sheet ES), data on the loading amount of the coating material on the electrode sheet ES, dimensional data (e.g., the width of the insulating material on the coating material and the overlap width between the coating material and the insulating material), mismatch data between the coating tape on the upper surface of the electrode sheet ES and the coating tape on the lower surface of the electrode sheet ES, etc. Here, the loading amount is the amount of coating material loaded per unit area of ​​the electrode sheet ES, and may be the surface density of the coating material.

[0054] The measuring device 131 may include a sensing portion 131S and a processor 131P. The sensing portion 131S may be configured to sense the physical quantity of the electrode sheet ES to generate a measurement signal MS. For example, the sensing portion 131S may include a time delay and integration (TDI) camera, a complementary metal oxide semiconductor (CMOS) image sensor, a time of flight (TOF) sensor, etc. The sensing portion 131S may include a transmitter and a receiver configured to measure using non-destructive signals such as ultrasound, microwaves, terahertz waves, or infrared rays. The sensing portion 131S may include analog and / or digital sensors, such as biosensors, chemical sensors, component sensors, current and / or power meters, air quality sensors, gas sensors, Hall effect sensors, brightness level sensors, and optical sensors. The measuring device 131 may include a pressure sensor, a temperature sensor, an ultrasonic sensor, a proximity sensor, a door state sensor, a motion tracking sensor, a humidity sensor, a visible light and infrared sensor, a camera, etc.

[0055] Hereinafter, the technical idea of ​​the present invention will be described with respect to an embodiment as a non-limiting example, in which the measuring device 131 is a loading gauge configured to measure the loading of the coating layer on the sheet SM (e.g., an online thickness gauge (web gauge) of Thermofisher Scientific); or a thickness gauge, and the measurement data includes the loading or thickness. A person skilled in the art will be able to derive an embodiment in which the measuring device includes one of the above-mentioned sensors and is configured to sense one of the above-mentioned measured quantities.

[0056] The processor 131P can be configured to collect measurement data based on the measurement signal MS sensed by the sensing part 131S. The processor 131P can be connected to the sensing part 131S by wire or wirelessly. The processor 131P can be configured to correct the measurement data by adding an offset measurement to each measurement value of the measurement data. Due to the progress of the process and the aging of the equipment, the measurement value of the measurement data may be different from the actual value. The processor 131P can correct the measurement value of the measurement data based on the offset measurement to improve the reliability of the roll map generation system 100 and the roll map generation method. The offset measurement can be determined based on information provided to the equipment system by means of methods such as sampling testing.

[0057] The inspector 133 may be configured to inspect the electrode sheet ES to collect inspection data. For example, the inspector 133 may be a visual machine. The visual machine is an image-based inspection device, and may capture an image of the electrode sheet ES, and identify defects on the electrode sheet ES based on the image of the electrode sheet ES. As another embodiment, the inspector 133 may be an optical character reader (OCR) or an optical barcode reader (OBR). The inspector 133 may be configured to collect data (e.g., defect data or an image of the electrode sheet ES) that is not specified in digital form, but is not limited thereto.

[0058] The inspection data may include a judgment of the quality of a process event and a portion of the electrode sheet ES. For example, the inspection data may include: data on the appearance of the electrode sheet ES collected by an image-based inspection device such as a visual machine; data on disconnections and seams on the electrode sheet ES; data on the portion of the electrode sheet ES that is sampled for inspection; data on the portion of the electrode sheet ES to be discarded; data on the discarded portion of the electrode sheet ES; data on whether the coating material and the insulating material on the electrode sheet ES are defective; data on reference points indicating the position of the electrode sheet ES; and defect data indicating whether there are defects, such as pinhole defects, pit defects, line defects, crack defects, side ring defects, island defects, folding defects, wrinkle defects, scar defects, and scratch defects. The reference points may be formed on the electrode sheet ES at certain intervals, and other elements on the electrode sheet ES may be positioned based on the reference points. The inspector 133 may be a color sensor, a bonding sensor, a reference point sensor, or a visual machine.

[0059] The inspector 133 may include a sensing portion 133S and a processor 133P. The sensing portion 133S may include one of the sensors described above as an embodiment related to the sensing portion 131S. The sensing portion 133S may be configured to inspect the electrode sheet ES to generate an inspection signal IS. The processor 133P may be configured to collect inspection data based on the inspection signal IS sensed by the sensing portion 133S. The processor 133P may be connected to the sensing portion 133S by wire or wirelessly.

[0060] The measurement data and the inspection data may be time series data. The measurement data and the inspection data may be time-ordered. Time ordering is the main feature of time series data. Time ordering is the organization of events in the order in which they occur and arrive to be processed. That is, the measurement data and the inspection data may be stored based on the time point at which the measurement and inspection are performed, and may be associated with time. Therefore, each measurement value of the measurement data may be matched with a time, and each inspection value of the inspection data may be matched with a timestamp.

[0061] For example, the measurement data may have a series of measurement values ​​and a time value associated with the series of measurement values. The measurement values ​​and the time values ​​may be matched in a one-to-one manner, but are not limited thereto. As another embodiment, inspection data such as defect data may have a judgment value (a value indicating a defect) and a time value associated with the value indicating a defect. Here, the value indicating a defect is understood to mean that the value includes information about at least one of the presence of a defect and the type of defect.

[0062] The first controller 141 can communicate with the first rotary encoder 121 and the second rotary encoder 123, the measuring device 131, and the inspector 133 via a wired or wireless data network. The data network can be unidirectional or bidirectional. The data network can be implemented by a physical channel, WiFi, a public network, and / or a dedicated network using Bluetooth or other frequency bands. The first rotary encoder 121 and the second rotary encoder 123, the measuring device 131, and the additional measuring devices and inspectors can be configured to collect data from the equipment, workpieces, intermediate products, and products in the roll map generation system 100, or generate signals for collecting data therefrom.

[0063] The first controller 141 may be configured to transmit the coordinate data CD to the processor 131P. The processor 131P may be configured to correlate the coordinate data CD with the measurement data to generate coordinate-correlated measurement data CMD. Typically, the measurement data may be processed based on a trigger point.

[0064] As a non-limiting embodiment, the trigger point for processing the measurement data may be the completion of a scan. For example, the sensing portion 131S may scan the electrode sheet ES in the width direction of the electrode sheet ES, and whenever a scan is performed, the measurement data may be stored, processed, manipulated, and transmitted. As another embodiment, the trigger point may be the completion of multiple scans or partial completion of a scan. Embodiments of the processing of measurement data may include storing measurement data, manipulating measurement data (e.g., generating coordinate-related measurement data CMD), and transmitting measurement data.

[0065] According to an exemplary embodiment, the measuring device 131 may be configured to calibrate the coordinate data CD based on the position of the sensing portion 131S of the measuring device 131. More specifically, the measuring device 131 may be configured to calibrate the coordinate data CD based on the offset length OD2 so that the coordinates of the coordinate data CD may be related to the measured values ​​of the measurement data.

[0066] The measuring device 131 can collect measurement data of a portion corresponding to (e.g., overlapping) the sensing portion 131S, and the coordinate data CD is collected by a second rotary encoder 123 (as described above) spaced apart from the sensing portion 131S, so that the portion of the electrode sheet ES corresponding to the winding amount signal WAS generated at the same time point may be different from the portion of the electrode sheet ES corresponding to the measurement signal MS.

[0067] The processor 131P may be configured to collect coordinate-related measurement data CMD based on the measurement data and the coordinate data CD. The coordinate-related measurement data CMD may be a representative value and a representative coordinate (e.g., a starting coordinate and an ending coordinate). The representative value may include at least one of the average value, standard deviation, median, maximum value, or minimum value of the measurement data of the portion of the electrode sheet ES that is inspected by a single scan by the sensing portion 131S. The representative coordinates (e.g., the starting coordinate and the ending coordinate) may indicate the starting point and the end point of the portion of the electrode sheet ES that is inspected by a single scan by the sensing portion 131S.

[0068] According to an exemplary embodiment, the processor 131P may be configured to calibrate the coordinate data CD (the coordinate data CD is collected simultaneously with the measurement data to correct the coordinate-related measurement data CMD) based on the offset length OD2, and associate the representative coordinates (e.g., the start coordinates and the end coordinates) of the calibrated coordinate data CD with the representative values ​​of the measurement values ​​of the measurement data. Therefore, the measurement values ​​of the measurement data may be matched with time, and the representative values ​​of the coordinate-related measurement data CMD may be matched with the representative coordinates (e.g., the start coordinates and the end coordinates).

[0069] A plurality of guide rollers may be interposed between the sensing portion 131S and the rewinder 113 to define a moving path of the electrode sheet ES. Therefore, the offset length OD2 may be defined as the length of the electrode sheet ES between the sensing portion 131S and the rewinder 113 according to the moving path of the electrode sheet ES. The offset length OD2 may be equal to or greater than a straight-line distance between the sensing portion 131S and the rewinder 113.

[0070] The processor 131P may be configured to generate evaluation data based on the coordinate-related measurement data CMD. The evaluation data may include a judgment value of the process of each of the multiple sections of the electrode sheet ES. The judgment value of the process of each of the multiple sections of the electrode sheet ES may be determined based on a comparison between a set range and a measured value (or a representative value of the measured value).

[0071] For example, a representative value within the first range may be determined as normal, a representative value within the second range greater than the first range may be determined as excessive, a representative value within the third range greater than the second range may be determined as very excessive, a representative value within the fourth range less than the first range may be determined as insufficient, and a representative value within the fifth range less than the fourth range may be determined as very insufficient.

[0072] Here, when the lower limit of the second range is greater than or equal to the upper limit of the first range, the second range is greater than the first range. Similarly, when the upper limit of the fourth range is less than or equal to the lower limit of the first range, the fourth range is less than the first range.

[0073] The processor 131P may be configured to transmit the coordinate-related measurement data CMD to the first controller 141. The coordinate-related measurement data CMD transmitted to the second controller 143 may be transmitted to the server 160 via the communication server 150. The second controller 143 and the communication server 150 may relay the communication of data (including the coordinate-related measurement data CMD) between the server 160 and the first controller 141. However, the embodiment is not limited thereto. The first controller 141 may transmit the coordinate-related measurement data CMD directly to the server 160.

[0074] The first controller 141 may be configured to transmit the coordinate data CD to the processor 133P. The processor 133P may be configured to associate the coordinate data CD with the inspection data to generate coordinate-related inspection data CID.

[0075] According to an exemplary embodiment, the inspector 133 may be configured to calibrate the coordinate data CD based on the position of the inspector 133. More specifically, the inspector 133 may be configured to calibrate the coordinate data CD based on the offset length OD3 so that the coordinates of the coordinate data CD may be related to the evaluation value of the inspection data. The offset length OD3 may be equal to or greater than the straight-line distance between the sensing portion 133S and the rewinder 113.

[0076] The processor 133P may be configured to collect coordinate-related inspection data CID based on the inspection data and the coordinate data CD. The coordinate-related inspection data CID may include an evaluation value (e.g., a value indicating whether a defect exists, a defect sequence, whether a reference point exists, a reference point sequence, etc.) and representative coordinates (e.g., a starting coordinate and an ending coordinate).

[0077] According to an exemplary embodiment, the processor 133P may be configured to calibrate the coordinate data CD (the coordinate data CD is collected simultaneously with the inspection data to collect the coordinate-related inspection data CID) based on the offset length OD3, and associate the coordinates of the calibrated coordinate data CD with the evaluation values ​​of the inspection data. Thus, the evaluation values ​​of the inspection data may be matched with time, and the coordinate-related inspection data CID may be matched with the coordinates. A series of evaluation values ​​(e.g., values ​​indicating a series of defects) of the coordinate-related inspection data CID may be matched with representative coordinates (e.g., starting coordinates and ending coordinates) of a section of the electrode sheet ES corresponding to the series of evaluation values.

[0078] The first controller 141 may be configured to receive an equipment signal ESS from the processing device 115 . The first controller 141 may be configured to collect equipment data ED based on the equipment signal ESS. The equipment signal ESS may include operation information of the processing device 115 .

[0079] For example, the equipment signal ESS may include information about the gap of the coating die, the pressure, speed and feed rate of the slurry pump, and the liquid level of the slurry supply tank. As another embodiment, the equipment signal ESS may include information about the temperature of the induction heating device, the pressure of the pressure roller and the position of the pressure roller. As another embodiment, the equipment signal ESS may include information about the speed of the slitting knife. As another embodiment, the equipment signal ESS may include information about the moving speed, tension and friction of the electrode sheet ES by the unwinder 111 and the rewinder 113.

[0080] The first controller 141 may be configured to transmit the equipment data ED, the coordinate-related measurement data CMD, the coordinate-related inspection data CID, and the winding amount signal WAS to the second controller 143 .

[0081] The second controller 143 may be configured to control the operation of the unwinder 111, the rewinder 113, the processing device 115, and the cutter 117. The second controller 143 may be configured to generate a signal for operating or stopping the unwinder 111, the rewinder 113, the processing device 115, and the cutter 117. The signal for operating or stopping the unwinder 111, the rewinder 113, the processing device 115, and the cutter 117 may be generated based on the recipe of the electrode sheet ES.

[0082] In order to control the process, a communication line for connecting the second controller 143 and the server 160 via the communication server 150 may be installed between the second controller 143 and the server 160. Therefore, compared with the case where the first rotary encoder 121 and the second rotary encoder 123 and the measuring device 131 directly transmit the unwinding amount signal UWAS, the winding amount signal WAS and the measurement signal MS to the first server 160 and the case where the first controller 141 directly transmits the coordinate-related measurement data CMD and the evaluation data to the server 160, the data transmission by means of the second controller 143 can reduce the resources required for installing the communication line and ensure efficient data processing and management.

[0083] The communication server 150 may include a program for communication between the second controller 143 of the manufacturing device and the server 160. The communication server 150 may be implemented by hardware as described below. The language and protocol of the server 160 may be different from the language and protocol of the second controller 143. For example, the language of the server 160 may be SQL, and the language of the second controller 143 may be a ladder diagram.

[0084] The communication server 150 may be configured to convert the product ID and the recipe of the electrode sheet ES transmitted from the server 160 into the language of the second controller 143. In addition, the communication server 150 may be configured to convert the device data ED, the coordinate-related measurement data CMD, and the coordinate-related inspection data CID into the language of the server 160, and record the coordinate-related measurement data CMD in the database of the server 160.

[0085] The server 160 may be configured to generate a roll map based on the device data ED, the coordinate-related measurement data CMD, and the coordinate-related inspection data CID. The roll map may be generated in batches. The roll map may include data about the specifications of the batch. The specifications of the batch may include, for example, a batch number, a length of the wound electrode sheet ES, a width of the electrode sheet ES, and materials and compositions for processing the electrode sheet ES.

[0086] According to an exemplary embodiment, the server 160 may be a data processing system that supports all activities required for managing the manufacture of secondary batteries, such as work scheduling management, work instructions, quality control, and work performance aggregation. The server 160 may be, for example, a manufacturing execution system (MES) software. The server 160 may be configured to input, process, output, and communicate data required for electrode manufacturing (including coating processes, pressing processes, and slitting processes).

[0087] As another embodiment, the server 160 can be configured to store and process raw measurement data of the electrode sheet ES. The server 160 can be configured to continuously monitor the processing of the electrode sheet ES based on the measurement data to manage the processing quality of the electrode sheet ES. The server 160 can be a static process controller (SPC). The server 160 can collect and analyze manufacturing data in almost real time to identify problematic conditions in a timely manner and provide notifications to operators before potential problems occur.

[0088] As another example, the server 160 can be a solution that manages all information and processing at all stages of the life cycle of a product or service throughout the global supply chain. The server 160 can be, for example, a product life cycle management (PLM) solution. The server 160 can store data about projects, parts, products, manuals, requirements, engineering change orders, quality, and workflows. The server 160 can be configured to generate and store electrode specification data ESD.

[0089] The processor 131P, the processor 133P, the first controller 141, the second controller 143, the communication server 150, and the server 160 may be implemented by hardware, firmware, software, or a combination thereof. For example, the processor 131P, the processor 133P, the first controller 141, the second controller 143, the communication server 150, and the server 160 may include a computing device such as a workstation computer, a desktop computer, a laptop computer, and a tablet computer. The processor 131P, the processor 133P, the first controller 141, the second controller 143, the communication server 150, and the server 160 may include: a simple controller; a complex processor such as a microprocessor, a CPU, or a GPU; a processor configured by software, dedicated hardware, or firmware. The processor 131P, the processor 133P, the first controller 141, the second controller 143, the communication server 150, and the server 160 may be implemented by, for example, a general-purpose computer or dedicated hardware such as a digital signal processor (DSP), a field programmable gate array (FPGA), or an application-specific integrated circuit (ASIC).

[0090] Server 160 may include a physical server or a cloud server. Server 160 may provide data and analysis results to an operator via various frameworks. The framework may include protocols that support data transmission so that a display device can visualize data via a user interface and provide updated visualizations when server 160 calculates new data. The protocols that support data transmission may use HTML, JavaScript, and / or JSON.

[0091] Server 160 may include various application programming interfaces (APIs) and other data management tools to store data in a database. The API may also be used to retrieve data from databases of various data management systems. The data management system may provide access to the database, extract or retrieve data from the database, and generate metrics. Here, metrics are tools for visualizing data. Metrics may include measurements generated in a time series manner and may be used to monitor applications and generate status warnings.

[0092] The volume map generation system 100 can implement a plug-in architecture to provide a plug-and-play connection between the measurement device 130, the inspector 133 and additional measurement devices and inspectors, and an API for obtaining data. Therefore, resources in a specific process step and a specific site can be easily transferred to a different process, and different sites or new resources can be easily introduced into each process step and each site.

[0093] The data network between the components of the volume map generation system 100 may include various types of communication channels, including unidirectional and bidirectional wired and wireless communications. For example, the data network may include an industrial protocol network such as OPC, Modbus, or ProfiNet. The communication channel may be a dedicated pipe communication channel such as a universal serial bus (USB), IEEE802 (Ethernet), IEEE1394 (Firewire), or other high-speed data communication standards.

[0094] In some embodiments, the roll map generation system 100 may further include a manual input system that allows an operator to input manufacturing data. The roll map generation system 100 may allow an operator to input data using an input tool and computer-based input of manufacturing data, such as Excel file capture.

[0095] According to some embodiments, the operations of processor 131P, processor 133P, first controller 141, second controller 143, communication server 150, and server 160 may be implemented by instructions stored on a machine-readable medium that can be read and executed by one or more processors. Here, a machine-readable medium may include any device for storing and / or transmitting information in a form readable by a machine (e.g., a computing device). Embodiments of machine-readable media may include read-only memory (ROM), random access memory (RAM), disk storage media, optical storage media, flash memory, electrical, optical, acoustic or other types of radio signals (e.g., carrier waves, infrared signals, digital signals, etc.), and other signals.

[0096] The processor 131P, the processor 133P, the first controller 141, the second controller 143, the communication server 150, and the server 160 may include firmware, software, routines, and instructions to perform the above-mentioned operations or processes described below. For example, the processor 131P, the processor 133P, the first controller 141, the second controller 143, the communication server 150, and the server 160 are embodied in a memory.

[0097] The first controller 141 and the second controller 143 may be, for example, a programmable logic controller (PLC). A PLC is a special type of microprocessor-based controller that uses a programmable memory to store instructions and implement functions such as logic, sequencing, timing, counting, and arithmetic operations to control machines and processes. A PLC is easy to operate and program.

[0098] The first controller 141 and the second controller 143 may include a power supply, a central processing unit (CPU), an input interface, an output interface, a communication interface, and a first storage device and a second storage device. The power supply may be configured to supply operating power to the CPU, the input module, the output module, the communication interface, and the first storage device and the second storage device. The first storage device may be configured to store the system program of the PLC. The first storage device may be, for example, a read-only memory (ROM), and is configured to permanently store data for the operating system of the second controller 143. The second storage device may be configured to store user programs and data. The user program may be a program set by the user so that the CPU can perform a specific function. The data may include the above-mentioned coordinate-related measurement data CMD and coordinate data CD. The second storage device may be configured to further store state information of the state of the input and output devices and the values ​​of timers, counters and other internal devices. The second storage device may be, for example, a random access memory (RAM).

[0099] The CPU can be configured to control the communication between modules that implement the logic and convert the input signal into the output operation signal. The CPU can operate based on the system program stored in the first storage device. The CPU can be configured to manipulate data based on the user program stored in the second storage device.

[0100] When the PLC is operating, the CPU can scan the current input conditions and data and store them in the storage device. Next, the CPU can be configured to read and execute the user program step by step, and then transmit the result to one of the output module, the communication module and the storage device.

[0101] The input modules and output modules perform isolation and signal conditioning, so sensors and actuators can be directly connected to the input modules and output modules without other circuits. The input modules and output modules can be configured to transfer data between the CPU and external devices.

[0102] The conditions and data of industrial devices and production processes can be transmitted to the CPU with the help of input modules. The results of the processing performed by the CPU can be transmitted to the actuator with the help of output modules. The input module can include, for example, mechanical switches, proximity switches, photoelectric switches, encoders, temperature and pressure switches, potentiometers, linear variable differential transformers, strain gauges, thermistors, thermal transistors, and digital and analog devices such as AC / DC thermocouple switches for position sensing. The input module can provide an interface between the input device and the CPU based on low DC voltage operation. Some input devices can generate analog signals within a high voltage range. The input module can be configured to convert the signal generated by the input device into a voltage within an acceptable range for the CPU.

[0103] The output module may be configured to generate a signal for controlling the operation of the actuator. The output module may include a relay, a transistor, and a triac. The output module may include a relay, a contactor, a solenoid valve, a motor, etc.

[0104] However, for ease of description, the above-mentioned components are provided, and the above-mentioned processor 131P, processor 133P, first controller 141, second controller 143, communication server 150 and server 160 may also be generated by computing devices, distributed computing devices, processors, firmware, software, routines and other devices that execute routines and instructions.

[0105] The architecture configured to generate a roll map can be implemented by simply adding the first controller 141 to the second controller 143, the communication server 150, and the server 160, which are basic elements in modern process management systems. That is, in the roll map generation system 100 according to the exemplary embodiment, the resources of the already installed manufacturing site can be used, and additional capital expenditures can be reduced. In addition, applying the same architecture as the existing manufacturing equipment to the newly constructed manufacturing equipment can improve the manufacturing reliability of the secondary battery, check / improve the problematic process, and effectively introduce new processes. Based on the above description, a person of ordinary skill in the art will be able to easily derive a roll map generation system of an integrated server of a roll map generation system including an integrated PLC that performs the functions of each of the first controller 141 and the second controller 143.

[0106] (Second Embodiment)

[0107] Figure 2 is a flow chart of a volume map generation method according to an exemplary embodiment.

[0108] Figure 3 is a diagram for describing a volume map generating method according to an exemplary embodiment.

[0109] refer to Figures 1 to 3 , in P110, the electrode sheet ES may be cut. The electrode roll may be completed by cutting the electrode sheet ES and a first batch L1 may be provided. The electrode sheet ES may be cut based on the winding amount signal WAS. According to an exemplary embodiment, the second controller 143 may be configured to generate a signal for controlling the operation of the cutting blade 117 based on the winding amount signal WAS. After reaching the target winding amount of the electrode roll ER2, the electrode roll ER2 may be separated by cutting the electrode sheet ES to complete the first batch L1. The completed first batch L1 may be unloaded from the rewinder 113, as shown in FIG. Figure 3 Indicated by the arrow.

[0110] Next, in P120, the calibration section of the electrode sheet ES may be identified. The calibration section may be identified by the server 160. The calibration section of the electrode sheet ES may be changed according to the data. Here, the data may include the device data ED, the coordinate-related measurement data CMD, and the coordinate-related inspection data CID. More specifically, the calibration section CR1 of the device data ED, the calibration section CR2 of the coordinate-related measurement data CMD, and the calibration section CR3 of the coordinate-related inspection data CID may be different from each other.

[0111] The calibration section may be located between the position on the electrode sheet ES where data is collected and the cutting portion of the electrode sheet ES. For example, the calibration section CR1 of the device data ED may be collected from a portion of the electrode sheet ES, the portion being located between the portion of the electrode sheet ES processed by the processing device 115 when the first batch L1 is separated by the cutting knife 117 and the cutting portion of the electrode sheet ES cut by the cutting knife 117. As another embodiment, the calibration section CR2 of the coordinate-related measurement data CMD may be collected from a portion of the electrode sheet ES, the portion being located between the portion of the electrode sheet ES sensed by the sensing portion 131S when the first batch L1 is cut by the cutting knife 117 and the cutting portion of the electrode sheet ES cut by the cutting knife 117. As another embodiment, the calibration section CR3 of the coordinate-related inspection data CMD may be collected from a portion of the electrode sheet ES, the portion being located between the portion of the electrode sheet ES sensed by the sensing portion 133S when the first batch L1 is cut by the cutting knife 117 and the cutting portion of the electrode sheet ES cut by the cutting knife 117.

[0112] Next, in P130, the data collected from the calibration section can be assigned to the roll map of the subsequent batch. Before the first batch L1 is completed, the equipment data ED is collected from the calibration section CR1, the coordinate-related measurement data CMD is collected from the calibration section CR2, and the coordinate-related inspection data CID is collected from the calibration section CR3. Therefore, the batch ID of the equipment data ED collected from the calibration section CR1, the coordinate-related measurement data CMD collected from the calibration section CR2, and the coordinate-related inspection data CID collected from the calibration section CR3 can represent the first batch L1, as shown in Table 1 below.

[0113] In Table 1, the first column indicates the batch ID before data calibration, the second column indicates the coordinates before data calibration, the third column indicates the batch ID after data calibration, and the fourth column indicates the coordinates after data calibration.

[0114] Batch ID Coordinates (au) Calibrated Batch ID Calibrated coordinates (au) First batch 1398 First batch 1398 First batch 1399 First batch 1399 First batch 1400 Second batch 0 First batch 1401 Second batch 1 First batch 1402 Second batch 2 First batch Omit Second batch Omit First batch 1465 Second batch 65 First batch 1466 Second batch 66 First batch 1467 Second batch 67 First batch 1468 Second batch 68 First batch 1469 Second batch 69 Second batch 70 Second batch 70 Second batch 71 Second batch 71 Second batch 72 Second batch 72 Second batch 73 Second batch 73 Second batch Omit Second batch Omit

[0115] The batch after the first batch L1 can be called the second batch. Assigning the data collected from the calibration section to the roll map of the subsequent batch can include setting the batch ID of the data collected from the calibration section to indicate the second batch. The batch ID of the equipment data ED collected from the calibration section CR1, the coordinate-related measurement data CMD collected from the calibration section CR2, and the coordinate-related inspection data CID collected from the calibration section CR3 can be calibrated to indicate the second batch. Therefore, when the roll map of the second batch is called based on the batch ID, the data collected from the calibration section can be retrieved. Next, in P140, the coordinates of the data collected from the calibration section can be calibrated. The lower limit of the coordinates of the data collected from the calibration section can be the finished length. Here, the finished length can be the target winding length of the electrode roll ER2 and is determined according to the product formula. The upper limit of the coordinates of the data collected from the calibration section can be the sum of the finished length and the corresponding lengths in the offset lengths OD1, OD2, and OD3. The coordinates of the data collected from the calibration section can be calibrated based on the finished length of the first batch L1. The coordinates of the data collected from the calibration section can be calibrated based on the finished length of the first batch L1 minus. In Table 1, an example of the completion length is 1400 (arbitrary unit, hereinafter referred to as "au"), and an example of the offset length is 69 (au). Therefore, the lower limit of the coordinates of the data collected from the calibration section is 1400 (au), and the upper limit of the coordinates is 1469 (au). Therefore, in Table 1, the coordinates in the range of 1400 (au) to 1469 (au) of the data collected from the calibration section can be calibrated to be in the range of 0 (au) to 69 (au).

[0116] The present invention has been described in more detail above with reference to the drawings, embodiments, etc. However, the configurations shown in the drawings or the embodiments described in this specification are merely embodiments of the present invention and do not reflect all the technical ideas of the present invention, and therefore it should be understood that various equivalent examples and modifications of alternative configurations will be made on the filing date of this application.

Claims

1. A method for generating a roll graph, the method comprising the following steps: cutting a cutting portion of an electrode sheet to provide a first batch, the electrode sheet being moved between an unwinder and a rewinder; as well as identifying a calibration section of the electrode sheet, The calibration section is located between a portion of the electrode sheet sensed by the sensing portion and the cutting portion of the electrode sheet when the electrode sheet is cut.

2. The method for generating a roll map according to claim 1, wherein: The batch identifier ID of the data collected from the calibration section indicates the first batch. 3 . The roll map generation method according to claim 1 , further comprising the step of allocating the data collected from the calibration section to a roll map of a second batch following the first batch.

4. The method for generating a roll map according to claim 3, wherein: The step of assigning the data to a reel of a second batch following the first batch includes setting a batch identifier ID of the data to indicate the second batch. 5 . The volume map generation method according to claim 1 , further comprising the step of calibrating the coordinates of the data collected from the calibration section.

6. The method for generating a scroll map according to claim 1, wherein: The coordinates of the data collected from the calibration section are lower bounded by the completed length of the first batch.

7. The method for generating a roll map according to claim 6, wherein: The coordinates of the data are based on the completed length calibration.

8. The method for generating a scroll map according to claim 6, wherein: The coordinates of the data are calibrated based on subtracting the completed length.

9. The method for generating a roll map according to claim 6, wherein: The upper limit of the coordinate of the data is the sum of the completion length and the offset length. The offset length is the length of the electrode sheet between the sensing portion and the winding device.

10. A method for generating a roll graph, the method comprising the following steps: cutting a cutting portion of an electrode sheet to provide a first batch, the electrode sheet being moved between an unwinder and a rewinder; as well as identifying a calibration section of the electrode sheet, The calibration section is located between a portion of the electrode sheet that is processed by a processing device and the cutting portion of the electrode sheet when the electrode sheet is cut. 11 . The volume map generation method according to claim 10 , further comprising the step of assigning the device data collected from the processing device to a volume map of a second batch following the first batch. 12 . The method for generating a volume map according to claim 10 , further comprising the step of calibrating the coordinates of the data collected from the calibration section.

13. The method for generating a roll map according to claim 10, wherein: The coordinates of the data collected from the calibration section are lower bounded by the completed length of the first batch.

14. The method for generating a scroll map according to claim 13, wherein: The coordinates of the data are based on the completed length calibration.

15. The method for generating a scroll map according to claim 13, wherein: The upper limit of the coordinate of the data is the sum of the completion length and the offset length. The offset length is the length of the electrode sheet between the processing device and the rewinder.

Images