How to generate a rolemap

Abstract

According to an exemplary embodiment, a method for generating a roll map is provided, the method including the steps of unwinding an electrode sheet from a first electrode roll and winding the electrode sheet onto a second electrode roll, collecting unwinding direction data for the first electrode roll, and generating a second roll map for the second electrode roll based on the first roll map for the first electrode roll and the unwinding direction data for the first electrode roll.

Description

[Technical Field]

[0001] The present invention relates to a method for generating a role map. This application claims the benefit of Korean Application No. 10-2023-0088294, filed on July 7, 2023, and Korean Application No. 10-2024-0080253, filed on June 20, 2024, which are incorporated herein by reference in their entireties. [Background technology]

[0002] Unlike primary batteries, secondary batteries can be charged and discharged multiple times. Secondary batteries are widely used as energy sources for various wireless devices such as handsets, laptops, and wireless vacuum cleaners. In recent years, improvements in energy density and economies of scale have dramatically reduced the manufacturing cost per unit capacity of secondary batteries, and as the driving range of battery electric vehicles (BEVs) has increased to the same level as fuel-powered vehicles, the primary use of secondary batteries has shifted from mobile devices to mobility.

[0003] Secondary batteries are manufactured through an electrode process, an assembly process, and an activation process. Among these processes, the electrode process is the most crucial process for determining the yield and performance of the battery cell. The electrode process can include a coating process, a roll press process, and a slitting process. In the coating process, active materials and insulating materials can be applied to the surface of a current collector. In the roll press process, the electrode can be pressed by a pressure roll. The roll press process can determine the density, performance, and surface quality of the electrode. In the slitting process, the electrode can be cut into multiple electrodes according to the design of the battery cell. Summary of the Invention [Problem to be solved by the invention]

[0004] The problem that the technical idea of ​​the present invention aims to solve is to provide a rewinding stage and a method for generating a roll map of the rewinding stage that has improved reliability and traceability. [Means for solving the problem]

[0005] According to an exemplary embodiment of the present invention for solving the above-mentioned problems, there is provided a method for generating a roll map, the method including the steps of unwinding an electrode sheet from a first electrode roll and winding the electrode sheet onto a second electrode roll, collecting unwinding direction data for the first electrode roll, and generating a second roll map for the second electrode roll based on the first roll map for the first electrode roll and the unwinding direction data for the first electrode roll.

[0006] The second roll map is generated by inverting the coordinate values ​​of the coordinate data of the first roll map.

[0007] By inverting the coordinate values ​​of the coordinate data, the start coordinate of the first roll map is calibrated to the end coordinate of the second roll map, and the end coordinate of the first roll map is calibrated to the start coordinate of the second roll map.

[0008] The first roll map includes data on the winding direction of the first electrode roll.

[0009] The electrode sheet includes an upper surface and a lower surface opposite the upper surface.

[0010] The first roll map includes a portion corresponding to the upper surface of the electrode sheet and a portion corresponding to the lower surface of the electrode sheet, and the second roll map includes a portion corresponding to the upper surface of the electrode sheet and a portion corresponding to the lower surface of the electrode sheet.

[0011] The unwinding direction of the first electrode roll is the same as the winding direction of the first electrode roll, the portion of the second roll map corresponding to the lower surface of the electrode sheet is generated based on the portion of the first roll map corresponding to the lower surface of the electrode sheet, and the portion of the second roll map corresponding to the upper surface of the electrode sheet is generated based on the portion of the first roll map corresponding to the upper surface of the electrode sheet.

[0012] The unwinding direction of the first electrode roll is opposite to the winding direction of the first electrode roll, the portion of the second roll map corresponding to the lower surface of the electrode sheet is generated based on the portion of the first roll map corresponding to the upper surface of the electrode sheet, and the portion of the second roll map corresponding to the upper surface of the electrode sheet is generated based on the portion of the first roll map corresponding to the lower surface of the electrode sheet.

[0013] According to an exemplary embodiment, there is provided a method for generating a roll map, the method including combining a first input electrode roll and a second input electrode roll to provide an output electrode roll, collecting combined data for the output electrode roll, and generating an output roll map for the output electrode roll based on the combined data, a first input roll map for the first input electrode roll, and a second input roll map for the second input electrode roll.

[0014] The step of generating the output roll map generates a first inverted roll map by inverting the coordinate values ​​of the coordinate data of the first input roll map, and generates a second inverted roll map by inverting the coordinate values ​​of the coordinate data of the second input roll map.

[0015] The first inverted roll map is incorporated into the output roll map.

[0016] The coordinate data of the second reverse roll map is calibrated based on the end coordinates of the first reverse roll map.

[0017] According to an exemplary embodiment, there is provided a method for generating a roll map, the method including the steps of unwinding an electrode sheet from a first electrode roll, discarding defective portions of the electrode sheet, winding the electrode sheet onto a second electrode roll, collecting scrap data indicative of the discarded portions of the electrode sheet, and generating a first roll map of the first electrode roll and a second roll map of the second electrode roll based on the scrap data.

[0018] The scrap data includes the start coordinates and length of the portion of the electrode sheet that was discarded.

[0019] Generating the second role map includes inverting coordinate values ​​of the coordinate data of the first role map.

[0020] The coordinate data of the second roll map is calibrated based on the starting coordinate and the length of the discarded portion of the electroded sheet.

[0021] According to an exemplary embodiment, there is provided a method for generating a roll map, the method including the steps of unwinding an electrode sheet from a first electrode roll completed in a first roll-to-roll process, the electrode sheet including first and second lanes arranged in a transverse direction; performing a second roll-to-roll process on the electrode sheet; winding the electrode sheet onto a second electrode roll; and generating a second roll map of the second electrode roll, the second roll map being based on second data collected from the electrode sheet in the second roll-to-roll process. and matching a first roll map of the first electrode roll with the second roll map based on a winding direction of the first electrode roll and an unwinding direction of the first electrode roll in the first roll-to-roll process, wherein the first roll map includes first data of the electrode sheet collected in the first roll-to-roll process and first coordinates that are matched to the first data and indicate a position within the electrode sheet.

[0022] The first roll-to-roll process is one of a roll pressing process and a slitting process.

[0023] The second roll-to-roll process involves scrapping the defective portion of the electrode sheet.

[0024] The first data of the first roll map collected from the top surface of the electrode sheet is matched with the second data of the second roll map collected from the top surface of the electrode sheet, and the first data of the first roll map collected from the bottom surface of the electrode sheet is matched with the second data of the second roll map collected from the bottom surface of the electrode sheet.

[0025] In the first roll-to-roll process, the electrode sheet is wound onto the first electrode roll by top winding, and in the second roll-to-roll process, the electrode sheet is unwound from the first electrode roll by top winding.

[0026] In the first roll-to-roll process, the electrode sheet is wound onto the first electrode roll by bottom winding, and in the second roll-to-roll process, the electrode sheet is unwound from the first electrode roll by bottom winding.

[0027] The first data of the first roll map collected from the first lane of the electrode sheet is matched with the second data of the second roll map collected from the second lane of the electrode sheet, and the first data of the first roll map collected from the second lane of the electrode sheet is matched with the second data of the second roll map collected from the first lane of the electrode sheet.

[0028] The first data of the first roll map collected from the top surface of the electrode sheet is matched with the second data of the second roll map collected from the bottom surface of the electrode sheet, and the first data of the first roll map collected from the bottom surface of the electrode sheet is matched with the second data of the second roll map collected from the top surface of the electrode sheet.

[0029] In the first roll-to-roll process, the electrode sheet is wound onto the first electrode roll by top winding, and in the second roll-to-roll process, the electrode sheet is unwound from the first electrode roll by bottom winding.

[0030] In the first roll-to-roll process, the electrode sheet is wound onto the first electrode roll by bottom winding, and in the second roll-to-roll process, the electrode sheet is unwound from the first electrode roll by top winding.

[0031] The first data of the first roll map collected from the first lane of the electrode sheet is matched with the second data of the second roll map collected from the first lane of the electrode sheet, and the first data of the first roll map collected from the second lane of the electrode sheet is matched with the second data of the second roll map collected from the second lane of the electrode sheet. [Effects of the Invention]

[0032] According to an exemplary embodiment of the present invention, a method for generating a roll map for a rewinding stage can be provided.

[0033] The effects that can be obtained from the exemplary embodiments of the present disclosure are not limited to the effects mentioned above, and other effects not mentioned can be clearly derived and understood from the following description by a person having ordinary skill in the art to which the exemplary embodiments of the present disclosure belong. In other words, unintended effects accompanying the implementation of the exemplary embodiments of the present disclosure can also be derived from the exemplary embodiments of the present disclosure by a person having ordinary skill in the art. [Brief explanation of the drawings]

[0034] [Figure 1] 1 illustrates a secondary battery manufacturing system according to an exemplary embodiment. [Figure 2] 1 illustrates a secondary battery manufacturing system according to an exemplary embodiment. [Figure 3] 1 illustrates a secondary battery manufacturing system according to an exemplary embodiment. [Figure 4] 1 is a flowchart illustrating a role map generation method according to an exemplary embodiment. [Figure 5] 1 is a flowchart illustrating a role map generation method according to an exemplary embodiment. [Figure 6] 1 is a diagram illustrating a method for generating a role map according to an exemplary embodiment; [Figure 7] 1 is a flowchart illustrating a role map generation method according to an exemplary embodiment. [Figure 8] 1 is a diagram illustrating a method for generating a role map according to an exemplary embodiment; [Figure 9] 1 shows the winding of an electrode sheet including lanes 1 to 4. [Figure 10] 10 shows how the first electrode roll is unwound in the first roll-to-roll process. [Figure 11] 10 shows how the second electrode roll is unwound in the second roll-to-roll process. [Figure 12] 10 is a diagram showing roll map matching for winding and unwinding aspects; [Figure 13] 10 is a diagram showing roll map matching for winding and unwinding aspects; [Figure 14] 10 is a diagram showing roll map matching for winding and unwinding aspects; [Figure 15] 10 is a diagram showing roll map matching for winding and unwinding aspects; DETAILED DESCRIPTION OF THE INVENTION

[0035] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Before that, the terms and words used in the specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings, but should be interpreted as meanings and concepts that are consistent with the technical idea of ​​the present invention, based on the principle that an inventor can appropriately define the concepts of terms to best describe his or her own invention.

[0036] Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent the entire technical idea of ​​the present invention, and there may be various equivalents and modifications that can replace them at the time of this application.

[0037] Furthermore, in the description of the present invention, if it is determined that a detailed description of related publicly known structures or functions may obscure the gist of the present invention, the detailed description will be omitted.

[0038] Since the embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art, the shapes and sizes of components in the drawings may be exaggerated, omitted, or shown in a schematic manner for clearer explanation. Therefore, the sizes and proportions of each component do not completely reflect the actual sizes and proportions.

[0039] (First embodiment) FIG. 1 shows a secondary battery manufacturing system 10 according to an exemplary embodiment.

[0040] Referring to FIG. 1, a secondary battery manufacturing system 10 may include a rewinding stage 100, a coating device 200, a roll pressing device 300, a slitting device 400, and a notching device 500.

[0041] The electrode sheet unwound from the input electrode roll can be processed by any one of the die coater of the coating device 200, the pressure roll of the roll pressing device 300, and the slitting knife of the slitting device 400, and the processed electrode sheet can be wound onto the electrode roll. As such, the process using the coating device 200, the roll pressing device 300, and the slitting device 400 to produce electrodes for secondary batteries can be called a roll-to-roll process.

[0042] The coating device 200 can perform a coating process on the electrode sheet. The coating process is a process of applying a coating material, such as an electrode slurry, onto the electrode sheet. The electrode slurry can include an electrode active material, a conductive material, a binder, and a solvent. The electrode slurry can be prepared by dissolving the electrode active material, the conductive material, the binder, and the like in a solvent.

[0043] The roll pressing device 300 can perform a roll pressing process on the electrode sheet. The roll pressing process is a process in which the electrode sheet coated with electrode slurry is passed between opposing pressure rolls. The roll pressing process can flatten the surface of the electrode sheet and increase the bonding strength between the active material of the electrode sheet and the current collector.

[0044] The slitting device 400 can perform a slitting process on the electrode sheet, which can separate the electrode sheet into a plurality of electrode sheets through the slitting process.

[0045] The notching device 500 can cut the electrode sheet unwound from the electrode roll into the shape of an electrode of a battery cell, thereby forming a unit electrode in the notching device 500. The notching device 500 can further perform a drying process on either the electrode sheet or the unit electrode.

[0046] If the electrode sheet contains defects, the defects can be removed by either the roll pressing device 300 or the rewinding stage 100.

[0047] In each of the rewinding stages 100, it is possible that no substantial processing is performed on the electrode sheet. Each of the rewinding stages 100 can change the winding direction of the electrode sheet. Each of the rewinding stages 100 can unwind the electrode roll, remove defects from the electrode sheet unwound from the electrode roll, and rewind the electrode sheet from which the defects have been removed. In this way, in addition to removing defects from the electrode roll, the outer part of the input electrode roll can be wound inward into the output electrode roll. Similarly, the inner part of the input electrode roll can be wound outward into the output electrode roll.

[0048] The roll pressing device 300 can remove defects from the electrode sheet while performing the roll pressing process, or can remove only the defects from the electrode sheet without performing the roll pressing process. The operation mode of the roll pressing device 300 in which only the defective portions of the electrode sheet are removed without performing the roll pressing process is called the rewinding mode. In the rewinding mode, each of the pressure rolls can be moved to a position spaced apart from the electrode sheet.

[0049] A unit electrode can be produced by sequentially processing an electrode roll through the coating device 200, roll pressing device 300, slitting device 400, and notching device 500. In the case of a long unit electrode, after the roll pressing process is performed in the roll pressing device 300, it can be transferred directly to the notching device 500 without slitting in the slitting device 400.

[0050] When the electrode roll processed by the coating apparatus 200 and input into the roll pressing apparatus 300 has excessive defects, the defects of the electrode roll can be removed by the roll pressing apparatus 300. Excessive defects of the electrode roll processed by the coating apparatus 200 may include a large number of folded tabs and ring defects.

[0051] If the electrode roll processed by the roll pressing device 300 has excessive defects, the defects of the electrode roll can be removed by either the roll pressing device 300 operating in the rewinding mode or the rewinding stage 100. The electrode roll with reduced defects (or no defects) can then be fed into the slitting device 400. Excessive defects in the electrode roll processed by the roll pressing device 300 can include missing windings and an excess of the upper limit on the number of defective tags.

[0052] If the electrode roll processed by the slitting device 400 has excessive defects, the defects in the electrode roll can be removed in the rewinding stage 100. The electrode roll with reduced defects (or no defects) can then be fed into the notching device 500. Excessive defects in the electrode roll processed by the slitting device 400 can include exceeding an upper limit on the number of defective tags.

[0053] Here, each of the rewinding stages 100 can be online. Each of the rewinding stages 100 can be configured to discard defective electrodes from the electrode roll and collect scrap data indicating the discarded length. This allows the length of electrodes discarded in the rewinding stage 100 to be updated, thereby improving the traceability of the secondary battery manufacturing process.

[0054] FIG. 2 shows a secondary battery manufacturing system 10 according to an exemplary embodiment.

[0055] Referring to FIG. 2, the secondary battery manufacturing system 10 may include a rewinding stage 100, an EIF 1010, a server 1020, and a display device 1030.

[0056] The rewinding stage 100 may include an unwinder 111, a rewinder 113, a splicing table 115, a scrap port 117, a first rotary encoder 121, a second rotary encoder 123, a reference point sensor 135, a first controller 141, a second controller 143, an EIF (Equipment Interface) 1010, a server 1020, and a display device 1030.

[0057] The secondary battery manufacturing system 10 can be configured to generate a roll map including data related to the electrode sheet ES. The roll map can represent the electrode sheet ES based on coordinate values ​​indicating positions on the electrode sheet ES. As described below, processes for manufacturing secondary batteries can be performed on the electrode sheet ES. The roll map can represent process events performed on the electrode sheet ES and include data related to the coordinates. This allows the roll map to enable feedback, feedforwarding, and tracking of the secondary battery manufacturing process, as described below.

[0058] The first electrode roll ER1 that has undergone the previous process can be loaded onto the unwinder 111. The unwinder 111 can be configured to unwind the electrode sheet ES from the first electrode roll ER1. The rewinder 113 can be configured to wind the electrode sheet ES onto the second electrode roll ER2. The electrode sheet ES is wound onto the second electrode roll ER2, and can be cut and separated after reaching a predetermined winding length. In this way, the electrode sheet ES can move between the unwinder 111 and the rewinder 113.

[0059] The roll map can be generated on a lot-by-lot basis. A lot is a production unit in a roll-to-roll process, and the separated second electrode roll ER2 is an example of a lot. Similarly, the first electrode roll ER1 newly loaded into the unwinder 111 is also an example of a lot. As a result, the server 1020 can store a first roll map of a previous process (e.g., a coating process, a roll pressing process, or a slitting process). The first roll map can correspond to the first electrode roll ER1. The server 1020 can also be configured to generate a second roll map of the second electrode roll ER2 based on the processing of the rewinding stage 100. The second roll map can correspond to the second electrode roll ER2.

[0060] By way of non-limiting example, the second role map can be generated by updating the first role map, or the second role map can be generated based on data generated in the rewinding stage 100 without loading the first role map.

[0061] The time series data constructed over time in the roll map (i.e., corresponding to the progress of the process) can be associated with coordinate data collected based on the amount of movement of the electrode sheet ES (i.e., either the amount consumed or the amount input).

[0062] The manufacturing of secondary batteries involves a series of different processes, and leading processes affect subsequent processes. However, if the time series data of a leading process cannot be directly matched with the real-world workpieces, intermediate products, and finished products, it is difficult to reflect the time series data of the leading process in the subsequent process. Hereinafter, the correction of the subsequent process based on the data generated according to the results of the leading process is called feedforward.

[0063] Here, the term "worked product" refers to an article provided as a result of each process, such as the electrode sheet ES, which has undergone the coating process, roll pressing process, and slitting process shown in FIG. 1. The semi-finished product may refer to one of a separator, an electrode, or an assembly thereof, which has been cut by the notching process. The semi-finished product may also be a structure including a housing and an electrode assembly housed in the housing (in some cases, the structure may further include an electrolyte). The product refers to an article that has been processed to be operable as a secondary battery by the activation process. The above definitions of the work product, semi-finished product, and product relate to one aspect of the same and do not exclude the usual definitions thereof.

[0064] The secondary battery electrode process involves a series of roll-to-roll processes. For feedforwarding, time-series data must be associated with the positions of images of workpieces, parts, semi-finished products, and finished products in the real world. Here, feedforwarding can include controlling the processing of the electrode sheet ES based on a roll map of the first electrode roll ER1 generated in a previous process. For example, the roll map of the first electrode roll ER1 processed in the current process can include defective data DD, and in the rewinding stage 100, the electrode sheet ES unwound from the first electrode roll ER1 can be discarded based on the defective data DD.

[0065] The roll map can associate the time series data with coordinate data including coordinate values ​​indicating the positions of images of workpieces, parts, semi-finished products, and finished products in the real world. The roll map can provide matching between the time series data and the workpieces, parts, semi-finished products, and finished products in the real world based on the coordinate data. Thus, the generation of the roll map and feedforwarding based on the roll map can improve the productivity and quality of the secondary battery manufacturing process by quantifying and objectifying aspects of the process that previously relied on the discretion of the worker.

[0066] The roll map of a previous lot can also be used to improve the process for subsequent lots, and such an action can be called process feedback. Process feedback using a roll map can include identifying process conditions and process parameters that lead to problems and defects based on the data contained in the roll map.

[0067] Furthermore, as described below, roll maps are cumulatively generated for workpieces, parts, semi-finished products, and finished products of a unit process, thereby enabling tracking of the process history of shipped products (e.g., battery cells, battery modules, or battery packs). As an example, a battery cell may include a cell ID formed on an electrode assembly or a case. The cell ID may include lot number and coordinate information of the electrodes and separator included in the battery cell. In other words, the cell ID may be associated with a roll map of the electrodes and separator included in the battery cell. As a result, if an event such as a quality issue occurs in a battery cell that has already been shipped, historical data on the manufacture of the battery cell can be retrieved based on the cell ID.

[0068] The first rotary encoder 121 may be configured to sense the amount of electrode sheet ES unwound from the first electrode roll ER1 by the unwinder 111. Thus, the first rotary encoder 121 may generate a feed amount signal UWAS indicating the length of the electrode sheet ES unwound by the unwinder 111. The first rotary encoder 121 may be configured to transmit the feed amount signal UWAS to the first controller 141.

[0069] The second rotary encoder 123 may be configured to sense the amount of the electrode sheet ES wound onto the second electrode roll ER2 by the rewinder 113. Thus, the second rotary encoder 123 may generate an exhaustion amount signal WAS indicating the length of the electrode sheet ES wound by the rewinder 113. The second rotary encoder 123 may be configured to transmit the exhaustion amount signal WAS to the first controller 141.

[0070] Portions of the electrode sheet ES can be discarded as described below, which may cause the length of the electrode sheet ES taken up by the unwinder 111 to differ from the amount of the electrode sheet ES taken up by the rewinder 113.

[0071] The first controller 141 may be configured to collect coordinate data of the electrode sheet ES based on the consumption amount signal WAS and / or the input amount signal UWAS of the electrode sheet ES. As one example, the first controller 141 may determine the travel distance of the electrode sheet ES based on the input amount signal UWAS of the electrode sheet ES, thereby determining the position within the electrode sheet ES of the portion of the electrode sheet ES that is unwound by the unwinder 111 at each time an event occurs on the electrode sheet ES. As another example, the first controller 141 may determine the travel distance of the electrode sheet ES based on the consumption amount signal WAS of the electrode sheet ES, thereby determining the position within the electrode sheet ES of the portion of the electrode sheet ES that is wound up by the rewinder 113 at each time an event occurs on the electrode sheet ES. As another example, the first controller 141 may determine the travel distance of the electrode sheet ES based on each of the consumption amount signal WAS and the input amount signal UWAS.

[0072] The events here may include various processes, inspections, and measurements that occur on the electrode sheet ES in the rewinding stage 100, such as cutting the electrode sheet ES, splicing the electrode sheet ES, sensing datum points on the electrode sheet ES, sensing defective tags on the electrode sheet ES, etc. Hereinafter, as a non-limiting example, the technical idea of ​​the present invention will be described with reference to an embodiment in which the first controller 141 collects coordinate data based on the consumed amount signal WAS of the electrode sheet ES.

[0073] The coordinate data may include coordinate values ​​that are matched to each portion of the electrode sheet ES. That is, each arbitrary point on the electrode sheet ES can be matched with a coordinate. The coordinate values ​​may be one-dimensional quantities in the longitudinal direction of the electrode sheet ES, but are not limited thereto. The coordinate values ​​may also be two-dimensional quantities in the longitudinal direction and the Y direction, which is the width direction of the electrode sheet ES.

[0074] The NG sensor 131 may be configured to sense any one of an NG mark and an NG tag on the electrode sheet ES. The NG mark may be formed, for example, by an inkjet printer, and may include information about the location and type of defect. The NG tag may be attached to the electrode sheet ES by an operator or an NG tag attacher. The NG tag may indicate the location of the defect on the electrode sheet ES. As a non-limiting example, the NG sensor 131 may be any one of a color sensor and a vision machine. The NG sensor 131 may be configured to generate an NG sensing signal NSS. The NG sensor 131 may be configured to transmit the NG sensing signal NSS to the first controller 141.

[0075] The first controller 141 may be configured to collect NG sensing data NSD based on the NG sensing signal NSS. The first controller 141 may be configured to associate the NG sensing signal NSS with coordinate data to collect the NG sensing data NSD. The NG sensing data NSD may include, for example, a defect value indicating the presence or absence of a defect and the type of the defect, and a coordinate value matched to the defect value.

[0076] To collect the NG sensing data NSD, the coordinate data can be calibrated based on the offset length OL1 to compensate for the difference between the portion of the electrode sheet ES sensed by the first rotary encoder 121, i.e., the portion of the electrode sheet ES wound by the rewinder 113, and the portion of the electrode sheet ES sensed by the NG sensor 131.

[0077] According to an exemplary embodiment, the first controller 141 may calibrate coordinate data collected at the same time as the NG sensing signal NSS based on the offset length OL1 to collect the NG sensing data NSD, and associate the calibrated coordinate data with the NG sensing signal NSS. The processing unit may be configured to transmit the NG sensing data NSD to the first controller 141.

[0078] The offset length OL1 is the length of the electrode sheet ES between the NG sensor 131 and the rewinder 113, corresponding to the movement path of the electrode sheet ES. The offset length OL1 may be the same as the linear distance between the NG sensor 131 and the rewinder 113, or may be longer than the linear distance between the NG sensor 131 and the rewinder 113.

[0079] The second controller 143 can be configured to control the operation of the unwinder 111, the rewinder 113, the scrap port 117, and the processing tools 119. The second controller 143 can be configured to generate signals for operating and interrupting the unwinder 111, the rewinder 113, the scrap port 117, and the processing tools 119. The signals for operating and interrupting the unwinder 111, the rewinder 113, the scrap port 117, and the processing tools 119 can be generated based on a body including product ID and manufacturing recipe details.

[0080] The second controller 143 may be configured to receive NG sensing data NSD from the first controller 141. The second controller 143 may be configured to receive defect data DD from the server 1020. The defect data DD may be loaded into the second controller 143 via the EIF 1010. Here, the defect data DD may indicate the location of a defect on the first electrode roll ER1. The defect data DD may be included in a first roll map of the first electrode roll ER1.

[0081] The second controller 143 can be configured to generate signals for operating and interrupting the unwinder 111, the rewinder 113, the scrap port 117, and the processing tool 119 based on the NG sensing data NSD and the defect data DD. When a defect on the electrode sheet ES identified by the defect data DD and the NG sensing data NSD approaches the splicing table 115, the second controller 143 can be configured to generate a signal to slow down the moving speed of the electrode sheet ES or interrupt the winding and unwinding of the unwinder 111 and the rewinder 113.

[0082] After cutting the start position of the defect on the splicing table 115 (or a position adjacent to the start position of the defect, taking into account a process margin), the scrap port 117 can be configured to wind up the defective portion DES of the electrode sheet ES, as indicated by the thick dashed line. After the defective portion DES of the electrode sheet ES has been sufficiently wound up by the scrap port 117, the electrode sheet ES connected to the scrap port 117 and the electrode sheet ES connected to the unwinder 111 can be separated. Thereafter, the portion of the electrode sheet ES connected to the unwinder 111 and the portion of the electrode sheet ES connected to the rewinder 113 can be spliced ​​together, allowing the current process to continue. The portion of the electrode sheet ES connected to the unwinder 111 and the portion of the electrode sheet ES connected to the rewinder 113 can be spliced ​​together on the splicing table 115.

[0083] In the past, there was a problem that defective electrode sheets were wound up without being discarded, or defective portions remained in the electrode sheet even after being discarded. According to the exemplary embodiment, the defective portions DES of the electrode sheet ES are discarded based on the NG detection data NSD and the defect data DD, thereby improving the reliability and traceability of the disposal of the electrode sheet ES.

[0084] To discard the defective portions DES of the electrode sheet ES, after the unwinder 111 and the rewinder 113 are stopped, the defective portions DES of the electrode sheet ES can be moved to the scrap port by driving the unwinder 111 without driving the rewinder 113. The first controller 141 may be configured to collect scrap data SD based on the input amount signal UWAS after starting to discard the defective portions DES of the electrode sheet ES. To collect the scrap data SD, the first controller 141 may also receive a signal for controlling the operation of the unwinder 111 and the rewinder 113 from the second controller 143. As another example, the first controller 141 may be configured to collect scrap data SD based on the amount of rotation of the drive roll of the scrap port 117. As another example, the first controller 141 may be configured to collect scrap data SD based on a change in the distance between reference points on the electrode sheet ES and the distance between the seam on the electrode sheet ES and the reference point.

[0085] In the past, the amount of electrode sheets to be discarded was determined subjectively by an operator or based on the mass of the discarded electrode sheet portion, resulting in low accuracy of the amount of electrode sheets to be discarded and poor process traceability. According to an exemplary embodiment, scrap data SD indicating the location and amount of the discarded electrode sheet portion DE based on the input amount signal UWAS is collected, thereby objectifying the disposal process, which previously relied on the subjectivity of the operator. This improves the reliability and traceability of secondary battery manufacturing.

[0086] The seam sensor 133 may be configured to sense a seam on the electrode sheet ES to generate a seam detection signal JSS. The seam may join the electrode sheet ES after discarding a defective portion DES of the electrode sheet ES. By way of non-limiting example, the seam sensor 133 may be any one of a color sensor and a vision machine. The seam sensor 133 may be configured to transmit the seam detection signal JSS to the first controller 141.

[0087] The first controller 141 may be configured to collect seam sensing data JSD based on the seam sensing signal JSS. The first controller 141 may be configured to collect seam sensing data JSD by associating the seam sensing signal JSS with coordinate data.

[0088] According to an exemplary embodiment, the first controller 141 can calibrate the coordinate data collected at the same time as the seam sensing signal JSS based on the offset length OL2 to collect the seam sensing data JSD, and associate the calibrated coordinate data with the seam sensing signal JSS.

[0089] The offset length OL2 is the length of the electrode sheet ES between the seam sensor 133 and the rewinder 113, corresponding to the path of movement of the electrode sheet ES. The offset length OL2 may be the same as the linear distance between the seam sensor 133 and the rewinder 113, or may be longer than the linear distance between the seam sensor 133 and the rewinder 113.

[0090] The reference point sensor 135 may be configured to sense reference points on the electrode sheet ES to generate a reference point sensing signal DSS. The reference points may be formed at set intervals on the electrode sheet ES to indicate their positions on the electrode sheet ES. Each of the reference points may be, for example, a two-dimensional barcode containing information regarding the direction and order of the reference points. Thus, the reference point sensing signal DSS may include a time value corresponding to the sensing of the reference point and a reference point order value. The reference point sensor 135 may be configured to transmit the reference point sensing signal DSS to the first controller 141.

[0091] The first controller 141 may be configured to collect reference point sensing data DSD based on the reference point sensing signal DSS. The first controller 141 may be configured to collect the reference point sensing data DSD by associating the reference point sensing signal DSS with coordinate data.

[0092] According to an exemplary embodiment, the first controller 141 can calibrate the coordinate data collected at the same time as the reference point sensing signal DSS based on the offset length OL3 to collect the reference point sensing data DSD, and associate the calibrated coordinate data with the reference point sensing signal DSS.

[0093] The offset length OL3 is the length of the electrode sheet ES between the reference point sensor 135 and the rewinder 113, corresponding to the path of movement of the electrode sheet ES. The offset length OL3 may be the same as the linear distance between the reference point sensor 135 and the rewinder 113, or may be longer than the linear distance between the reference point sensor 135 and the rewinder 113.

[0094] According to an exemplary embodiment, the scrap data SD, the NG sensing data NSD, and any data generated based on events of the electrode sheet ES can be calibrated based on the reference point sensing data DSD.

[0095] The rewinding stage 100 may further include additional measuring instruments and testers. Each of the measuring instruments and testers may include a sensing unit and a processing unit. The measuring instruments may be configured to generate measurement data, and the testers may be configured to generate test data. The processing units of the testers and measuring instruments may be connected to the sensing units of the testers and the sensing units of the measuring instruments via wires or wirelessly.

[0096] The measurement data may include a plurality of measurement values ​​expressed in numerical values. For example, the measurement data may include dimensional data of the electrode sheet ES, such as thickness and width, data on the amount of coating material loaded on the electrode sheet ES, dimensional data such as the width of the insulating material provided on the coating material and the overlap width between the coating material and the insulating material, and data on mismatch between the land lane on the upper surface of the electrode sheet ES and the land lane on the lower surface of the electrode sheet ES. Here, the loading amount represents the amount of coating material loaded per unit area of ​​the electrode sheet ES and may be the areal density of the coating material.

[0097] The inspection data collected by the inspector may include judgments and process events related to the quality of the portions 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 vision machine, data on breaks and seams in the electrode sheet ES, data on portions of the electrode sheet ES that have been sampled, data on portions of the electrode sheet ES that are scheduled for disposal, data on discarded portions of the electrode sheet ES, data on the quality of the coating material and insulating material on the electrode sheet ES, data on reference points indicating the position of the electrode sheet ES, and defect data such as pinhole defects, crater defects, line defects, crack defects, side ring defects, Ireland defects, fold defects, wrinkle defects, poke defects, and dent defects. The inspector may be any one of a color sensor, a seam sensor, a reference point sensor, and a vision machine.

[0098] The measurement data and test data described above may be time-series data. The measurement data and test data may be temporally ordered. Temporal ordering is a key characteristic of time-series data, which is arranging events in the order in which they occur and arrive for processing. That is, the measurement data and test data may be sorted based on the time at which the measurements and tests were performed, and the measurement data and test data may be associated with time. This allows each measurement value of the measurement data to be matched to a time, and each test value of the test data to be matched to a time.

[0099] As an example, the measurement data may include a series of measurement values ​​(e.g., the amount of loading on the electrode sheet ES or the thickness of the electrode sheet ES) and time values ​​associated with the series of measurement values. The measurement values ​​and time values ​​may be matched one-to-one, but are not limited to this. As another example, the defect data may include a value indicating a defect and a time value associated with the value indicating a defect. Here, indicating a defect means including information regarding at least one of the presence or absence of a defect and the type of defect.

[0100] The measurement data is processed in a set manner to determine whether the measured portion of the electrode sheet ES is good or bad. If the measurement value of the electrode sheet ES (e.g., the amount of loading on the electrode sheet ES or the thickness of the electrode sheet ES) is within a set range including an upper limit and a lower limit, the corresponding portion of the electrode sheet ES may be determined to be good. If the measurement value of the electrode sheet ES (e.g., the amount of loading on the electrode sheet ES or the thickness of the electrode sheet ES) is smaller than the lower limit or larger than the upper limit, the corresponding portion of the electrode sheet ES may be determined to be bad.

[0101] The sensing unit of the meter may be configured to sense a physical quantity of the electrode sheet ES to generate a measurement signal. For example, the sensing unit 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 unit may also include an emitter and a receiver configured to perform measurements using non-destructive signals such as ultrasound, microwaves, terahertz waves, and infrared rays. The sensing unit may also include analog and / or digital sensors such as biosensors, chemical sensors, composition sensors, current and / or power meters, air quality sensors, gas sensors, Hall effect sensors, brightness level sensors, and light sensors. The meter may also include pressure sensors, temperature sensors, ultrasonic sensors, proximity sensors, door status sensors, motion tracking sensors, humidity sensors, color sensors, OCR readers, visible light sensors, infrared sensors, and cameras.

[0102] The processing unit may be configured to collect the inspection signals and measurement signals sensed by the sensing unit to generate inspection data and measurement data. The processing unit may be connected to the sensing unit via a wired or wireless connection. The processing unit of the measuring instrument may be configured to calibrate the measurement data by adding an offset measurement amount to each of a plurality of measurement values ​​of the measurement data. Due to the progress of the process and aging of the equipment, the measurement values ​​of the measurement data may differ from actual values. The processing unit may correct the measurement data based on the offset measurement amount. The offset measurement amount may be determined based on known information about the equipment system by a method such as a sample test.

[0103] According to an exemplary embodiment, the inspection instrument and the measurement instrument can be configured to calibrate the coordinate data based on their respective positions. More specifically, the inspection instrument and the measurement instrument can be configured to associate coordinate values ​​of the coordinate data with measurement values ​​of the measurement data or inspection values ​​of the inspection data by calibrating the coordinate data based on the offset lengths. The calibration of the coordinate data by the inspection instrument and the measurement instrument is similar to the calibration using the offset lengths OL1, OL2, and OL3.

[0104] The processing unit of the measuring device may be configured to collect evaluation data based on the measurement data. The evaluation data may be collected based on a comparison of measurement values ​​in multiple sections of the electrode sheet ES with set ranges. For example, a measurement value (or average) within a first range may be determined to be normal, a measurement value (or average) within a second range greater than the first range may be determined to be excessive, a measurement value (or average) within a third range greater than the second range may be determined to be very excessive, a measurement value (or average) within a fourth range less than the first range may be determined to be insufficient, and a measurement value (or average) within a fifth range less than the fourth range may be determined to be very insufficient.

[0105] Here, if the lower limit of the second range is equal to or greater than the upper limit of the first range, the second range is greater than the first range. Similarly, if the upper limit of the fourth range is equal to or less than the lower limit of the first range, the fourth range is smaller than the first range.

[0106] The first controller 141 may be in operative communication with the first rotary encoder 121, the second rotary encoder 123, the NG sensor 131, the seam sensor 133, the reference point sensor 135, the additional measuring instruments, and the additional inspection instruments via a wired or wireless data network. The data network may be unidirectional or bidirectional. The data network may be embodied by a public network and / or a dedicated network using physical channels, Wi-Fi, Bluetooth, and / or other frequency bands. The first rotary encoder 121, the second rotary encoder 123, the NG sensor 131, the seam sensor 133, the reference point sensor 135, the additional measuring instruments, and the additional inspection instruments may be configured to collect data or generate signals for collecting data from the equipment, workpieces, workpieces, and products within the rewinding stage 100.

[0107] The first controller 141 may be configured to transmit the NG sensing data NSD, the seam sensing data JSD, the scrap data SD, and the reference point sensing data DSD to the second controller 143. The NG sensing data NSD, the seam sensing data JSD, the scrap data SD, and the reference point sensing data DSD may be transmitted to the first server 1020 via the second controller 143 and the EIF 1010. The second controller 143 and the EIF 1010 may relay communication of data including the NG sensing data NSD, the seam sensing data JSD, the scrap data SD, and the reference point sensing data DSD between the first server 1020 and the first controller 141. However, without being limited thereto, the first controller 141 may also transmit the NG sensing data NSD, the seam sensing data JSD, the scrap data SD, and the reference point sensing data DSD directly to the server 1020.

[0108] In order to control the process, a communication line connecting the second controller 143 and the server 1020 via the EIF 1010 can be installed between the second controller 143 and the server 1020. As a result, data transmission via the second controller 143 can save resources required for installing a communication line and can make data processing and management more efficient, compared to when the first rotary encoder 121, the second rotary encoder 123, and the reference point sensor 135 directly transmit the input amount signal UWAS, the consumed amount signal WAS, and the measurement signal to the server 1020, or when the first controller 141 directly transmits the NG sensing data NSD, the joint sensing data JSD, the scrap data SD, and the reference point sensing data DSD to the server 1020.

[0109] The EIF 1010 may be a device for communication between the second controller 143 of the manufacturing equipment and the server 1020, which is an upper server.

[0110] The server 1020 can be configured to generate a roll map based on the NG sensing data NSD, the seam sensing data JSD, the scrap data SD, and the reference point sensing data DSD. The roll map can be generated on a lot-by-lot basis. The roll map can include data related to lot specifications. The lot specifications can include, for example, the lot number, the length of the wound electrode sheet ES, the width of the electrode sheet ES, and the materials and compositions used in processing the electrode sheet ES.

[0111] According to an exemplary embodiment, the server 1020 may be a data processing system that supports various activities required to manage the manufacturing of secondary batteries, such as work schedule management, work instructions, quality control, and work performance aggregation. The server 1020 may be, for example, a manufacturing execution system (MES). The server 1020 may be configured to perform input, processing, output, and communication of data required for electrode manufacturing, such as coating processes, pressing processes, and manufacturing processes.

[0112] According to another exemplary embodiment, the server 1020 may be configured to store and process raw measurement data. The server 1020 may continuously monitor the processing of the electrode sheets ES based on the measurement data, thereby managing the quality of the processing of the electrode sheets ES. According to an exemplary embodiment, the server 1020 may be a statistical process controller (SPC). The server 1020 may collect and analyze production data in near real time, thereby identifying problem conditions in a timely manner and providing an alarm to an operator before a potential problem occurs.

[0113] According to another exemplary embodiment, the server 1020 may be, for example, a data warehouse, and may store the NG sensing data NSD, scrap data SD, and coordinate data for a long period of time based on, for example, a product's quality warranty period.

[0114] According to other exemplary embodiments, the server 1020 may perform all of the respective functions of the MES, SPC, and data warehouse, or may be provided separately from the MES, SPC, and data warehouse to create the role map.

[0115] The first controller 141, the second controller 143, the EIF 1010, and the server 1020 may be implemented using hardware, firmware, software, or a combination thereof. For example, the first controller 141, the second controller 143, the EIF 1010, and the server 1020 may include computing devices such as a workstation computer, a desktop computer, a laptop computer, or a tablet computer. The first controller 141, the second controller 143, the EIF 1010, and the server 1020 may also include any one of a simple controller, a complex processor such as a microprocessor, a CPU, or a GPU, a software-configured processor, or dedicated hardware and firmware. The first controller 141, the second controller 143, the EIF 1010, and the server 1020 may be implemented using, for example, a general-purpose computer or application-specific hardware such as a digital signal processor (DSP), a field programmable gate array (FPGA), or an application-specific integrated circuit (ASIC).

[0116] The server 1020 may include a physical server or a cloud server. The server 1020 may provide data and analysis results to operators through various frameworks. The framework may include a protocol that supports data transmission so that the display device 1030 can visualize the data through a user interface and provide updated visualizations when new data is calculated by the server 1020. The protocol that supports the data transmission may use HTML, JavaScript, and / or JSON.

[0117] The server 1020 may include various APIs (Application Programming Interfaces) for storing data in databases and other data management tools. The APIs may also be used to retrieve data in the databases of various data management systems. The data management systems may provide access to the databases, pull or retrieve data from the databases, and generate metrics, where metrics are tools for visualizing data. Metrics include measurements generated over time and may be used to monitor applications and generate status alerts.

[0118] The server 1020 can transmit the visualization command VC to the display device 1030, and the display device 1030 can visualize the role map and display the visualized role map.

[0119] The rewinding stage 100 can implement a plug-in architecture along with an API for data acquisition to provide plug-and-play connectivity of measuring and inspection instruments, allowing resources at a particular process step and site to be easily transferred to other processes and other sites, or new resources to be easily introduced at each process step and site.

[0120] The data network between elements of the secondary battery manufacturing system 10 can include various types of communication channels, including unidirectional, bidirectional wired, and wireless communication. As an example, the data network can include industrial protocol networks such as OPC, Modbus, ProfiNet, etc. The communication channel can be a dedicated conduit communication such as USB (Universal Serial Bus), IEEE 802 (Ethernet), IEEE 1394 (FireWire), or other high-speed data communication standards.

[0121] In some embodiments, the secondary battery manufacturing system 10 may further include a manual input system that allows an operator to input manufacturing data. The secondary battery manufacturing system 10 may allow operator data input using an input tool or computer-based input of manufacturing data, such as scraping an Excel file. The manual input system may be, for example, a Supervisory Control and Data Acquisition (SCADA) HMI (Human-Machine Interface). SCADA typically includes a combination of software and hardware, such as PLCs and remote terminal units (RTUs). The HMI is a screen that supports communication between an operator and the SCADA system and is a key element of the SCADA system. For example, manual input via the HMI may include selecting defect types and reflecting performance at the time of completion.

[0122] The first controller 141, the second controller 143, and the integrated controller 140 (see FIG. 3), described below, may be programmable logic controllers (PLCs). A PLC is a specialized form of microprocessor-based controller that uses programmable memory to store instructions and implements functions such as logic, sequencing, timing, counting, and arithmetic to control machines and processes. PLCs are easy to operate and program.

[0123] The first controller 141 and the second controller 143 may include a power supply, a CPU, an input interface, an output interface, a communication interface, and a memory device. The power supply may be configured to supply power to other elements of the first controller 141 and the second controller 143, such as the CPU, the input interface, the output interface, the communication interface, and the memory device. The memory device may include a read-only memory (ROM) configured to store system programs such as an operating system, and a random access memory (RAM) configured to store user programs and data such as status information of input / output devices, timers, counters, and other internal device values. The CPU may be configured to implement logic and control communication between modules that convert input signals into output operating signals. The CPU may operate based on system programs and user programs stored in the memory device. The CPU may be configured to write or read inspection data and measurement data to or from the data area of ​​the memory device based on the system programs and user programs. Conditions and data of industrial equipment and production processes may be transmitted to the CPU via the input module. The results processed by the CPU can be transmitted to the actuator via the output module. The communication interface can be configured to transmit and receive data between the first controller 141 and the second controller 143, or between the second controller 143 and the EIF 1010.

[0124] According to some embodiments, the operations of the first controller 141, the second controller 143, the EIF 1010, and the server 1020 may be embodied as 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 mechanism for storing and / or transmitting information in a form readable by a machine (e.g., a computing device). For example, a machine-readable medium may include read-only memory (ROM), random access memory (RAM), magnetic disk storage media, optical storage media, flash memory, electrical, optical, acoustical, or other forms of radio signals (e.g., carrier waves, infrared signals, digital signals, etc.), and any other signals.

[0125] The first controller 141, the second controller 143, the EIF 1010, and the server 1020 may be configured with firmware, software, routines, and instructions to perform the operations described above or any of the steps described below. For example, the first controller 141, the second controller 143, the EIF 1010, and the server 1020 may be instantiated in memory.

[0126] The first controller 141 may be embodied by software configured to receive the input amount signal UWAS, the consumed amount signal WAS, the NG sensing signal NSS, the seam sensing signal JSS, and the reference point sensing signal DSS, collect coordinate data, the NG sensing data NSD, the seam sensing data JSD, the scrap data SD, and the reference point sensing data DSD, and transmit the NG sensing data NSD, the seam sensing data JSD, the scrap data SD, and the reference point sensing data DSD.

[0127] The second controller 143 may be embodied by software configured to generate control signals for controlling the unwinder 111, the rewinder 113, the scrap port 117, and the processing tool 119 based on the product ID, the product recipe, the defect data DD, and the NG detection signal NSS, receive the NG detection data NSD, the seam detection data JSD, the scrap data SD, and the reference point detection data DSD, and transmit the NG detection data NSD, the seam detection data JSD, the scrap data SD, and the reference point detection data DSD.

[0128] The EIF 1010 may be embodied by software for relaying the transmission of data and information between the second controller 143 and the server 1020. More specifically, the EIF 1010 may be embodied by software configured to perform flow control, error control, synchronization, sequence control, addressing, multiplexing, routing, format conversion, and the like of communications between the second controller 143 and the server 1020.

[0129] The server 1020 may be embodied, for example, by software configured to transmit the product ID and product recipe to the second controller 143 and generate a roll map based on the NG sensing data NSD, the seam sensing data JSD, the scrap data SD, and the reference point sensing data DSD.

[0130] However, this is for convenience of explanation, and the operations of the first controller 141, second controller 143, EIF 1010, and server 1020 described above may also be caused by a computing device, a distributed computing device, a processor, or other device executing firmware, software, routines, instructions, etc.

[0131] The architecture of the secondary battery manufacturing system 10 configured to generate a roll map can be realized by adding only the first controller 141 to the processing unit, second controller 143, EIF 1010, and server 1020, which are essential elements of a modern process control system. In other words, the system according to the exemplary embodiment can utilize resources already installed at the manufacturing site, thereby saving additional capital expenditures. Furthermore, by applying the same architecture as existing manufacturing facilities to newly constructed manufacturing facilities, it is possible to improve the reliability of secondary battery manufacturing, identify and improve problematic processes, and introduce new processes more efficiently.

[0132] (Second embodiment) FIG. 3 shows a secondary battery manufacturing system 11 according to an exemplary embodiment.

[0133] Referring to FIG. 3, the secondary battery manufacturing system 11 may include a rewinding stage 100, an EIF 1010, a server 1020, and a display device 1030.

[0134] The EIF 1010, server 1020, and display device 1030 are substantially the same as those described with reference to FIG.

[0135] The rewinding stage 100 may include an unwinder 111, a rewinder 113, a splicing table 115, a scrap port 117, a first rotary encoder 121, a second rotary encoder 123, a reference point sensor 135, an integrated controller 140, an EIF (Equipment Interface) 1010, a server 1020, and a display device 1030.

[0136] The unwinder 111, rewinder 113, splicing table 115, scrap port 117, first rotary encoder 121, second rotary encoder 123, reference point sensor 135, EIF (Equipment Interface) 1010, server 1020, and display device 1030 are substantially the same as those described with reference to Figure 2, so duplicate descriptions of them will be omitted.

[0137] 1. Thus, the integrated controller 140 can be embodied by software configured to receive the input amount signal UWAS, the consumed amount signal WAS, the NG sensing signal NSS, the splice sensing signal JSS, and the reference point sensing signal DSS, collect coordinate data, the NG sensing data NSD, the splice sensing data JSD, the scrap data SD, and the reference point sensing data DSD, transmit the NG sensing data NSD, the splice sensing data JSD, the scrap data SD, and the reference point sensing data DSD, and generate control signals for controlling the unwinder 111, the rewinder 113, the scrap port 117, and the processing tool 119 based on the product ID, the product recipe, the defect data DD, and the NG sensing data NSD.

[0138] (Third embodiment) FIG. 4 is a flowchart illustrating a role map generation method according to an exemplary embodiment.

[0139] 2 and 4, in P110, the electrode sheet ES is unwound from the first electrode roll ER1 and can be wound onto a second electrode roll ER2 (wind the electrode sheet into a second electrode roll). In this example, the electrode sheet ES can be unwound and wound without substantial processing of the electrode sheet ES (for example, discarding defective parts DES of the electrode sheet ES).

[0140] Next, in P120, unwinding direction data of the first electrode roll ER1 and winding direction data of the second electrode roll ER2 can be collected. For example, the unwinding direction data of the first electrode roll ER1 and the winding direction data of the second electrode roll ER2 can be collected by either the first controller 141 or the second controller 143. For example, the unwinding direction data of the first electrode roll ER1 can be used to generate a second roll map of the second electrode roll ER2. The winding direction data of the second electrode roll ER2 can be used for feedforward of a subsequent process based on the data of the second roll map of the second electrode roll ER2.

[0141] Next, in P130, unwinding direction data of the first electrode roll ER1 and winding direction data of the second electrode roll ER2 can be transmitted to the server 1020. The unwinding direction data of the first electrode roll ER1 and winding direction data of the second electrode roll ER2 can be transmitted to the server 1020 via the EIF 1010.

[0142] Subsequently, in P140, a second roll map of the second electrode roll ER2 can be generated based on the first roll map of the first electrode roll ER1 and the unwinding direction data of the first electrode roll ER1. The second roll map of the second electrode roll ER2 can be generated by the server 1020. The generation of the second roll map can include calibrating the coordinate data of the first roll map.

[0143] The outer part of the first electrode roll ER1 is wound inside the second electrode roll ER2, and the inner part of the first electrode roll ER1 is wound outside the second electrode roll ER2 (the outer part of the first electrode roll winds inwards in the second electrode roll and the inner part of the first electrode roll winds outwards in the second electrode roll). Thus, generating the second roll map of the second electrode roll ER2 can include inverting the coordinate data of the first roll map of the first electrode roll ER1. By inverting the coordinate data, the start coordinate of the first roll map can be calibrated to the end coordinate of the second roll map, and the end coordinate of the first roll map can be calibrated to the start coordinate of the second roll map.

[0144] For example, if the start coordinate of the first roll map of the first electrode roll ER1 is S1 and the end coordinate is E1, any coordinate X of the first roll map of the first electrode roll ER1 can be calibrated to a coordinate X' of the second roll map of the second electrode roll ER2 by the following equation 1.

[0145]

number

[0146] For example, if the start coordinate of the first roll map is 0 and the end coordinate is 1600, the coordinate 100 can be calibrated to 1600-(100-0)=1500, where the coordinate values ​​are expressed in arbitrary units.

[0147] Although the coordinate data of the second roll map of the second electrode roll ER2 is calibrated using Equation 1 above, the association between the coordinate data and other data of the first roll map (e.g., measurement data and inspection data) remains unchanged. That is, the value of data related to the coordinate X of the first roll map of the first electrode roll ER1 can be matched with the coordinate X' of the second roll map of the second electrode roll ER2.

[0148] Furthermore, the electrode sheet ES can be processed on both its upper and lower surfaces, and the first roll map of the first electrode roll ER1 can include a portion corresponding to the upper surface (i.e., partial data) and a portion corresponding to the lower surface (i.e., partial data). Here, the lower surface of the electrode sheet ES can face the bottom of the space in which the rewinding stage 100 is installed, and the upper surface of the electrode sheet ES can face the ceiling (or upper part) of the space in which the rewinding stage 100 is installed.

[0149] When the winding direction and unwinding direction of the first electrode roll ER1 are the same, the portion corresponding to the lower surface of the second roll map of the second electrode roll ER2 can be generated based on the portion corresponding to the lower surface of the first roll map of the first electrode roll ER1 (i.e., by calibrating its coordinate data), and the portion corresponding to the upper surface of the second roll map of the second electrode roll ER2 can be generated based on the coordinate data of the portion corresponding to the upper surface of the first roll map of the first electrode roll ER1 (i.e., by calibrating its coordinate data).

[0150] When the winding direction and unwinding direction of the first electrode roll ER1 are opposite, the portion corresponding to the lower surface of the second roll map of the second electrode roll ER2 can be generated based on the coordinate data of the portion corresponding to the upper surface of the first roll map of the first electrode roll ER1 (i.e., by calibrating that coordinate data), and the portion corresponding to the upper surface of the second roll map of the second electrode roll ER2 can be generated based on the coordinate data of the portion corresponding to the lower surface of the first roll map of the first electrode roll ER1 (i.e., by calibrating that coordinate data).

[0151] The winding direction of the first electrode roll ER1 is the direction in which the first electrode roll ER1 is wound in the process equipment before the rewinding stage 100, and the unwinding direction of the first electrode roll ER1 is the direction in which the first electrode roll ER1 is unwound in the rewinding stage 100.

[0152] The winding direction and unwinding direction of the first electrode roll ER1 are the same when the winding direction of the first electrode roll ER1 and the unwinding direction of the first electrode roll ER1 are each clockwise, or when the winding direction of the first electrode roll ER1 and the unwinding direction of the first electrode roll ER1 are each counterclockwise.

[0153] The winding direction and unwinding direction of the first electrode roll ER1 are opposite when the winding direction of the first electrode roll ER1 is counterclockwise and the unwinding direction of the first electrode roll ER1 is clockwise, or when the winding direction of the first electrode roll ER1 is clockwise and the unwinding direction of the first electrode roll ER1 is counterclockwise.

[0154] Here, the clockwise and counterclockwise directions can be defined based on the case where the unwinder 111 is relatively to the left of the rewinder 113 in the observer's field of view, as shown in Figures 2 and 3. This definition of the rotation direction is intended to clarify the present invention in a non-limiting sense, since the same rotational aspect of the unwinder 111 and the rewinder 113 may have different rotation directions depending on the observation direction.

[0155] (Fourth embodiment) FIG. 5 is a flowchart illustrating a role map generation method according to an exemplary embodiment.

[0156] FIG. 6 is a diagram illustrating a method for generating a role map according to an exemplary embodiment.

[0157] 2, 5, and 6, in P210, a first input electrode roll IR1 and a second input electrode roll IR2 can be coupled to provide an output electrode roll OR. The first input electrode roll IR1 can be fed into the unwinder 111 before the second input electrode roll IR2 and can be wound by the rewinder 113. This allows the second input electrode roll IR2 to include a portion WP1 wound by the rewinder 113 and a sheet portion SP1 not wound by the rewinder 113. The length of the first input electrode roll IR1 may be shorter than the target winding length of the completed electrode roll. To meet the target winding length, an additional second input electrode roll IR2 can be coupled to the first input electrode roll IR1.

[0158] The second input electrode roll IR2 can be loaded onto the unwinder 111 for coupling with the first input electrode roll IR1. This allows the second input electrode roll IR2 to include the sheet portion SP2 unwound by the unwinder 111 and the wound portion WP2 before being unwound by the unwinder 111.

[0159] The first input electrode roll IR1 and the second input electrode roll IR2 can be joined by joining the sheet portion SP1 of the first input electrode roll IR1 and the sheet portion SP2 of the second input electrode roll IR2 using the seam JT. Before joining the first input electrode roll IR1 and the second input electrode roll IR2, the sheet portions SP1 and SP2 can be partially cut.

[0160] Next, in P220, connection data of the output electrode roll OR can be collected. The connection data of the output electrode roll OR can include whether or not connection is performed, the length CL1 of the cut portion C1 of the sheet portion SP1, the length CL2 of the cut portion C2 of the sheet portion SP2, the start coordinate of the seam JT, and the end coordinate of the seam JT (or the length JTL of the seam JT). The connection data of the output electrode roll OR can be collected by either the first controller 141 or the second controller 143. The connection data of the output electrode roll OR can also be collected by the integrated controller 140 (see FIG. 3).

[0161] Subsequently, in P230, the combined data of the output electrode roll OR can be transmitted to the server 1020. The combined data of the output electrode roll OR can be transmitted to the server 1020 via the EIF 1010.

[0162] Subsequently, in P240, an output roll map of the output electrode roll OR can be generated. The output roll map of the output electrode roll OR can be generated based on the first input roll map of the first input electrode roll IR1, the second input roll map of the second input electrode roll IR2, and the combined data. The output roll map of the output electrode roll OR can be generated by the server 1020.

[0163] More specifically, for generating the output roll map, the coordinate data of the first input roll map and the coordinate data of the second input roll map may be calibrated by the method described with reference to Figure 4. The first inverted roll map may be provided by inverting the coordinate data of the first input roll map, and the second inverted roll map may be provided by inverting the coordinate data of the second input roll map.

[0164] The output roll map can be generated by combining the first inverted roll map and the second inverted roll map. The output roll map can include the first inverted roll map. The first inverted roll map can be incorporated into the output roll map without additional calibration after the inversion of the coordinate data described with reference to FIG. 4. To combine the second inverted roll map with the first inverted roll map, any coordinate value Y of the coordinate data of the second inverted roll map can be calibrated to Y' based on the following Equation 2:

[0165]

number

[0166] Here, EC is the coordinate of the end point of the sheet portion SP1 before the first input electrode roll IR1 and the second input electrode roll IR2 are joined together. Δ can be determined by the following equation 3.

[0167]

number

[0168] where JTL is the length of the seam JT, CL1 is the length of the cut portion C1 of the sheet portion SP1, and CL2 is the length of the cut portion C2 of the sheet portion SP2. Figure 6 shows the coordinate values ​​of the reference points DA1, DA2, and DA3 of the first input electrode roll IR1 and the reference points DB1, DB2, and DB3 of the second input electrode roll IR2 before and after joining, and the coordinate values ​​other than the reference points can also be calibrated in the same manner based on Equations 2 and 3.

[0169] When the length JTL of the seam JT, the length CL1 of the cut portion C1 of the sheet portion SP1, and the length CL2 of the cut portion C2 of the sheet portion SP2 are each 0 (i.e., when the sheet portions SP1 and SP2 are not cut before the first input electrode roll IR1 and the second input electrode roll IR2 are joined), the output roll map of the output electrode roll OR can be provided by simply adding the end coordinate value of the first input roll map of the first input electrode roll IR1 to the coordinate value of the second input roll map of the second input electrode roll IR2. The association between the coordinate data of the second input roll map and other data (e.g., inspection data and measurement data) remains the same before and after calibration of the coordinate values ​​of the coordinate data of the second input roll map.

[0170] (Fifth embodiment) FIG. 7 is a flowchart illustrating a role map generation method according to an exemplary embodiment.

[0171] 8 is a diagram illustrating a roll map generation method according to an exemplary embodiment, more specifically, a portion of an electrode sheet ES.

[0172] 2, 7, and 8, in P310, the defective portion DES of the electrode sheet ES can be discarded. The defective portion DES of the electrode sheet ES can be identified based on the defect data DD of the roll map of the first electrode roll ER1 or the NG sensing data NSD collected by the first controller 141.

[0173] Subsequently, in P320, scrap data SD can be collected. The scrap data SD can be collected by the first controller 141. The scrap data SD can also be collected by the integrated controller 140 (see FIG. 3). The scrap data SD can include start and end coordinates of the discarded portion of the electrode sheet ES (or the length of the discarded portion). According to an exemplary embodiment, the scrap data SD can be collected based on the input amount signal UWAS when the rewinder 113 is stopped.

[0174] According to an exemplary embodiment, scrap data SD can also be collected based on the distance between a reference point on the electrode sheet ES and a seam. For example, in FIG. 8, reference points D8, D9, D10, D11, D12, and D13 can be formed at intervals of approximately 120 (arbitrary units). Because the interval between reference points D10 and D11 is 100, the portion of the electrode sheet ES between reference points D10 and D11 is discarded, and the discarded length is confirmed to be 20. In addition, the start coordinate of the discarded portion can be determined based on the distance between reference points D11 closest to or before the seam JT.

[0175] Subsequently, at P330, the scrap data SD can be transmitted to the server 1020. The scrap data SD can be transmitted to the server 1020 via the EIF 1010.

[0176] Next, in P340, a second roll map of the second electrode roll ER2 can be generated based on the scrap data SD and the first roll map of the first electrode roll ER1. The second roll map of the second electrode roll ER2 can be generated by the server 1020. To generate the second roll map, the coordinate data of the first roll map can be calibrated based on the method described with reference to FIG. 4. Generating the second roll map can include calibrating the coordinate data of the first roll map of the first electrode roll ER1 based on the scrap data SD. This allows the coordinate values ​​matched to the data values ​​following the seam JT (e.g., the inspection data values ​​and the measurement data values) to be reduced by the discarded length (e.g., 20). To generate the second roll map of the second electrode roll ER2, the coordinate data of the first roll map of the first electrode roll ER1 can be calibrated by the method described with reference to FIG. 7 in addition to being calibrated by the method described with reference to FIG. 4.

[0177] The above has disclosed the calibration of coordinate data by winding and unwinding, the calibration of coordinate data by coupling the first input electrode roll IR1 and the second input electrode roll IR2, the calibration of coordinate data by discarding a portion of the electrode sheet ES, and the generation of a roll map thereby, with reference to Figures 4 to 8. Based on what is described herein, a person skilled in the art can easily arrive at the calibration of coordinate data and the generation of a roll map thereby by combining the methods of Figures 4, 5, and 7.

[0178] (Sixth embodiment) 1 and 2, a roll map can be generated for each process. That is, when an electrode roll is completed by the coating apparatus 200, a roll map for the coating process can be generated based on data collected from the completed electrode roll. When an electrode roll is completed by the roll pressing apparatus 300, a roll map for the roll pressing process can be generated based on data collected from the completed electrode roll. When an electrode roll is completed by the slitting apparatus 400, a roll map for the slitting process can be generated based on data collected from the completed electrode roll.

[0179] To ensure process traceability, data collected from a previous roll-to-roll process must be matched with data collected between subsequent roll-to-roll processes. Such data matching is based on the coordinates of the electrode sheet ES, which necessitates rules for matching between coordinates collected in a previous roll-to-roll process and those collected in a subsequent process.

[0180] Depending on the winding direction of the preceding roll-to-roll process (e.g., roll pressing process and slitting process) and the loading method (or unwinding direction) of the subsequent roll-to-roll process (e.g., processing by rewinding stage 100), the transformation of the coordinates collected in the preceding roll-to-roll process and the coordinates collected in the subsequent roll-to-roll process may be different.

[0181] More specifically, depending on the winding direction of the preceding roll-to-roll process (e.g., the roll pressing process and the slitting process) and the loading method (or unwinding direction) of the subsequent roll-to-roll process (e.g., processing by the rewinding stage 100), the top and bottom surfaces of the electrode sheet ES may be changed, or the order of the first to fourth lanes L1, L2, L3, L4 (see Figure 10) may be reversed.

[0182] Here, the lower surface of the electrode sheet ES can face the bottom of the space in which the rewinding stage 100, coating device 200, roll pressing device 300, slitting device 400, and notching device 500 are installed, and the upper surface of the electrode sheet ES is opposite to the lower surface.

[0183] FIG. 9 shows the winding of the electrode sheet ES including the first to fourth lanes L1, L2, L3, and L4.

[0184] 9 shows an example in which the electrode sheet ES includes four lanes L1, L2, L3, and L4, but this is for illustrative purposes only and does not limit the technical concept of the present invention in any way. The electrode sheet ES may also include two, three, or five or more lanes.

[0185] Each of the first to fourth lanes L1, L2, L3, and L4 may extend in the direction of travel of the electrode sheet ES and may be a covered portion of the electrode sheet ES. Although not explicitly shown, there may be one or more uncovered portions between the first to fourth lanes L1, L2, L3, and L4. As an example, there may be an uncovered portion extending in the direction of travel of the electrode sheet ES between the second lane L2 and the third lane L3, and the first lane L1 and the second lane L2 may be continuous in the horizontal direction, and the third lane L3 and the fourth lane L4 may be continuous in the horizontal direction.

[0186] According to some embodiments, the electrode sheet ES may be wound onto the first electrode roll R1 by a top winding method. In the top winding method, the electrode sheet ES may be wound onto the first electrode roll R1 while being positioned above the central axis of the first rewinder 1113. Top winding may also be referred to as clockwise winding.

[0187] In some other embodiments, the electrode sheet ES may be wound onto the second electrode roll R2 using a bottom winding method. In the bottom winding method, the electrode sheet ES may be wound onto the second electrode roll R2 while positioned below the central axis of the first rewinder 1113. Bottom winding may also be referred to as counterclockwise winding.

[0188] In the case of the first electrode roll R1, the upper surface of the electrode sheet ES may be located outside the first electrode roll R1 relative to the lower surface of the corresponding electrode sheet ES, and in the case of the second electrode roll R2, the lower surface of the electrode sheet ES may be located outside the first electrode roll R1 relative to the upper surface of the corresponding electrode sheet ES.

[0189] Fig. 10 shows the unwinding of the first electrode roll R1 in the subsequent roll-to-roll process, in which the open arrow indicates the traveling direction of the electrode sheet ES.

[0190] 10, a first electrode roll R1 may be provided by upper winding of a first rewinder 1113 in a preceding roll-to-roll process. The first electrode roll R1 may be loaded onto a second unwinder 2111 in a subsequent roll-to-roll process. The first rewinder 1113 may be included in either the roll pressing device 300 or the slitting device 400 in FIG. 1. The second unwinder 2111 may be included in the rewinding stage 100 in FIG. 1.

[0191] According to an exemplary embodiment, as shown by arrow T11, the second unwinder 2111 may be configured to unwind the electrode sheet ES from the first electrode roll R1 in a top-unwinding manner. In top-unwinding, the electrode sheet ES may be positioned above the central axis of the second unwinder 2111. Top-unwinding may also be referred to as clockwise unwinding.

[0192] In this case, the up-down orientation of the electrode sheet ES is maintained, and the order of the first to fourth lanes L1, L2, L3, and L4 may be reversed. The upper surface ESU of the electrode sheet ES wound around the first electrode roll R1 in the preceding roll-to-roll process may be the upper surface ESU of the electrode sheet ES unwound from the first electrode roll R1 in the subsequent roll-to-roll process. The lower surface ESB of the electrode sheet ES unwound from the first electrode roll R1 in the preceding roll-to-roll process may be the lower surface ESB of the electrode sheet ES unwound from the first electrode roll R1 in the subsequent roll-to-roll process. In the preceding roll-to-roll process, the first to fourth lanes L1, L2, L3, and L4 may be arranged from the left side of the traveling direction of the electrode sheet ES, and in the subsequent roll-to-roll process, the first to fourth lanes L1, L2, L3, and L4 may be arranged from the right side of the traveling direction of the electrode sheet ES.

[0193] According to another exemplary embodiment, the second unwinder 2111 may be configured to unwind the electrode sheet ES from the first electrode roll R1 in a bottom unwinding manner, as shown by arrow T12. In bottom unwinding, the electrode sheet ES may be located below the central axis of the second unwinder 2111. Bottom unwinding may also be referred to as counterclockwise unwinding.

[0194] In this case, the electrode sheet ES is inverted upside down, and the order of the first to fourth lanes L1, L2, L3, and L4 can be maintained. The upper surface ESU of the electrode sheet ES taken up around the first electrode roll R1 in the preceding roll-to-roll process can correspond to the lower surface ESB' of the electrode sheet ES unwound from the first electrode roll R1 in the subsequent roll-to-roll process. The lower surface ESB of the electrode sheet ES taken up around the first electrode roll R1 in the preceding roll-to-roll process can correspond to the upper surface EBU' of the electrode sheet ES unwound from the first electrode roll R1 in the subsequent roll-to-roll process. In each of the preceding and subsequent roll-to-roll processes, the first to fourth lanes L1, L2, L3, and L4 can be arranged from the left side based on the traveling direction of the electrode sheet ES.

[0195] FIG. 11 shows the unwinding of the second electrode roll R2 in the subsequent roll-to-roll process.

[0196] 11, the second electrode roll R2 may be provided by the bottom winding of the first rewinder 1113 in a preceding roll-to-roll process, and the first electrode roll R1 may be loaded onto the second unwinder 2111 in a subsequent roll-to-roll process.

[0197] According to an exemplary embodiment, the second unwinder 2111 can be configured to unwind the electrode sheet ES from the second electrode roll R2 in a top-unwind manner, as shown by arrow T21.

[0198] In this case, the electrode sheet ES is inverted upside down, and the order of the first to fourth lanes L1, L2, L3, and L4 can be maintained. The upper surface ESU of the electrode sheet ES taken up around the second electrode roll R2 in the preceding roll-to-roll process can correspond to the lower surface ESB' of the electrode sheet ES unwound from the second electrode roll R2 in the subsequent roll-to-roll process. The lower surface ESB of the electrode sheet ES taken up around the second electrode roll R2 in the preceding roll-to-roll process can correspond to the upper surface ESU' of the electrode sheet ES unwound from the second electrode roll R2 in the subsequent roll-to-roll process. In each of the preceding and subsequent roll-to-roll processes, the first to fourth lanes L1, L2, L3, and L4 can be arranged from the left side based on the traveling direction of the electrode sheet ES.

[0199] According to another exemplary embodiment, the second unwinder 2111 can be configured to unwind the electrode sheet ES from the second electrode roll R2 in a bottom unwinding manner, as shown by arrow T22.

[0200] In this case, the up-down orientation of the electrode sheet ES is maintained, and the order of the first to fourth lanes L1, L2, L3, and L4 may be reversed. The upper surface ESU of the electrode sheet ES wound around the second electrode roll R2 in the preceding roll-to-roll process may be the upper surface ESU of the electrode sheet ES unwound from the second electrode roll R2 in the subsequent roll-to-roll process. The lower surface ESB of the electrode sheet ES unwound from the second electrode roll R2 in the preceding roll-to-roll process may be the lower surface ESB of the electrode sheet ES unwound from the second electrode roll R2 in the subsequent roll-to-roll process. In the preceding roll-to-roll process, the first to fourth lanes L1, L2, L3, and L4 may be arranged from the left side of the traveling direction of the electrode sheet ES, and in the subsequent roll-to-roll process, the first to fourth lanes L1, L2, L3, and L4 may be arranged from the right side of the traveling direction of the electrode sheet ES.

[0201] Depending on the direction in which the electrode roll is wound in the preceding roll-to-roll process and the direction in which the electrode roll is unwound in the following roll-to-roll process P2, the top and bottom surfaces of the electrodes may be maintained or reversed, and the order of the width directions of the first to fourth lanes L1, L2, L3, and L4 may be changed or maintained.

[0202] FIG. 12 is a diagram showing matching between the first roll map M1 and the second roll map M2 in the winding and unwinding modes corresponding to the arrow T11 in FIG.

[0203] FIG. 13 is a diagram showing matching between the first roll map M1 and the second roll map M2 in the winding and unwinding modes corresponding to the arrow T12 in FIG.

[0204] FIG. 14 is a diagram showing matching between the first roll map M1 and the second roll map M2 in the winding and unwinding modes corresponding to the arrow T21 in FIG.

[0205] FIG. 15 is a diagram showing matching between the first roll map M1 and the second roll map M2 in the winding and unwinding modes corresponding to the arrow T22 in FIG.

[0206] 12 to 15 show the relationship between a first roll map M1 generated in a preceding roll-to-roll process and a second roll map M2 generated in a subsequent roll-to-roll process. In Fig. 12 to 15, the lower surface of the electrode sheet ES is highlighted in gray due to the upper and lower division of the electrode sheet ES.

[0207] Referring to Figures 2 and 10 to 15, the server 1020 can be configured to match a first roll map M1 generated in a preceding roll-to-roll process with a second roll map M2 generated in a subsequent roll-to-roll process based on whether the top and bottom surfaces of the electrode sheet ES have been swapped and whether the order of the lanes L1, L2, L3, and L4 of the electrode sheet ES has been reversed.

[0208] In some embodiments, the server 1020 can be configured to store the winding aspects of the preceding roll-to-roll process and the unwinding aspects of the subsequent roll-to-roll process. In some embodiments, the server 1020 can include a storage device configured to store lot information including the winding aspects of the preceding roll-to-roll process and the unwinding aspects of the subsequent roll-to-roll process.

[0209] As shown by arrows T11 and T22, when the winding direction in the preceding roll-to-roll process is the same as the unwinding direction in the subsequent roll-to-roll process (i.e., top winding and top unwinding, or bottom winding and bottom unwinding), the top and bottom surfaces of the electrodes are maintained, but the order of the first to fourth lanes L1, L2, L3, and L4 is reversed.

[0210] As shown by arrows T12 and T21, when the winding direction in the preceding roll-to-roll process is different from the unwinding direction in the subsequent roll-to-roll process (i.e., winding from the top and unwinding from the bottom, or winding from the bottom and unwinding from the top), the order of the first to fourth lanes L1, L2, L3, and L4 is maintained, but the electrode sheet ES is reversed upside down.

[0211] In each case indicated by arrows T11, T12, T21, and T22, the start point S1 of the first roll map M1 corresponds to the end point T2 of the second roll map M2, and the end point T1 of the first roll map M1 corresponds to the start point S2 of the second roll map M2, because the outer portions of the electrode roll, which were processed relatively later in the roll-to-roll process, are unwound first in the subsequent process.

[0212] The server 1020 can be configured to read the winding mode of the preceding roll-to-roll process and the unwinding mode of the subsequent roll-to-roll process, and then match the corresponding positions according to the rules shown in Figures 12 to 15.

[0213] 10 and 12 , in a top-winding and top-unwinding case as indicated by arrow T11, the server 1020 can be configured to match data of a first roll map M1 collected from the top surface ESU of the electrode sheet ES before being wound onto the first electrode roll R1 with data of a second roll map M2 collected from the top surface ESU of the electrode sheet ES wound onto the first electrode roll R1, and can be configured to match data of a first roll map M1 collected from the bottom surface ESB of the electrode sheet ES before being wound onto the first electrode roll R1 with data of a second roll map M2 collected from the bottom surface ESB of the electrode sheet ES wound onto the first electrode roll R1. The server 1020 is configured to invert coordinates to match the start point S1 of the first roll map M1 to the end point T2 of the second roll map M2, and to match the end point T1 of the first roll map M1 to the start point S2 of the second roll map M2. The server 1020 may be configured to match the first role map M1 with the second role map M2 based on the reversal of the order of the first to fourth lanes L1, L2, L3, and L4.The server 1020 matches the data of the first roll map M1 collected from the first lane L1 of the electrode sheet ES before being wound onto the first electrode roll R1 with the data of the second roll map M2 collected from the fourth lane L4 of the electrode sheet ES unwound from the first electrode roll R1, matches the data of the first roll map M1 collected from the second lane L2 of the electrode sheet ES before being wound onto the first electrode roll R1 with the data of the second roll map M2 collected from the third lane L3 of the electrode sheet ES unwound from the first electrode roll R1, and The data of the first roll map M1 collected from the third lane L3 of the electrode sheet ES before being wound onto the roll R1 can be matched with the data of the second roll map M2 collected from the second lane L2 of the electrode sheet ES unwound from the first electrode roll R1, and the data of the first roll map M1 collected from the fourth lane L4 of the electrode sheet ES before being wound onto the first electrode roll R1 can be matched with the data of the second roll map M2 collected from the first lane L1 of the electrode sheet ES unwound from the first electrode roll R1.

[0214] 11 and 15, in the bottom winding and bottom unwinding case as indicated by arrow T22, the server 1020 can be configured to match data of a first roll map M1 collected from the top surface ESU of the electrode sheet ES before being wound onto the first electrode roll R1 with data of a second roll map M2 collected from the top surface ESU of the electrode sheet ES wound onto the first electrode roll R1, and can be configured to match data of a first roll map M1 collected from the bottom surface ESB of the electrode sheet ES before being wound onto the first electrode roll R1 with data of a second roll map M2 collected from the bottom surface ESB of the electrode sheet ES wound onto the first electrode roll R1. The server 1020 is configured to invert coordinates to match the start point S1 of the first roll map M1 to the end point T2 of the second roll map M2, and to match the end point T1 of the first roll map M1 to the start point S2 of the second roll map M2. The server 1020 may be configured to match the first role map M1 with the second role map M2 based on the reversal of the order of the first to fourth lanes L1, L2, L3, and L4.The server 1020 matches the data of the first roll map M1 collected from the first lane L1 of the electrode sheet ES before being wound onto the first electrode roll R1 with the data of the second roll map M2 collected from the fourth lane L4 of the electrode sheet ES unwound from the first electrode roll R1, and matches the data of the first roll map M1 collected from the second lane L2 of the electrode sheet ES before being wound onto the first electrode roll R1 with the data of the second roll map M2 collected from the third lane L3 of the electrode sheet ES unwound from the first electrode roll R1, and The data of the first roll map M1 collected from the third lane L3 of the electrode sheet ES before being wound onto the electrode roll R1 can be matched with the data of the second roll map M2 collected from the second lane L2 of the electrode sheet ES unwound from the first electrode roll R1, and the data of the first roll map M1 collected from the fourth lane L4 of the electrode sheet ES before being wound onto the first electrode roll R1 can be matched with the data of the second roll map M2 collected from the first lane L1 of the electrode sheet ES unwound from the first electrode roll R1.

[0215] 10 and 13, in the case of top winding and bottom unwinding as indicated by arrow T12, the server 1020 can be configured to match data of a first roll map M1 collected from the top surface ESU of the electrode sheet ES before being wound onto the second electrode roll R2 with data of a second roll map M2 collected from the bottom surface ESB' of the electrode sheet ES wound onto the second electrode roll R2, and can be configured to match data of the first roll map M1 collected from the bottom surface ESB of the electrode sheet ES before being wound onto the second electrode roll R2 with data of the second roll map M2 collected from the top surface ESU' of the electrode sheet ES wound onto the second electrode roll R2. The server 1020 is configured to invert coordinates to match the start point S1 of the first roll map M1 to the end point T2 of the second roll map M2, and to match the end point T1 of the first roll map M1 to the start point S2 of the second roll map M2. The server 1020 may be configured to match the first role map M1 with the second role map M2 based on maintaining the order of the first to fourth lanes L1, L2, L3, and L4.The server 1020 matches the data of the first roll map M1 collected from the first lane L1 of the electrode sheet ES before being wound onto the second electrode roll R2 with the data of the second roll map M2 collected from the first lane L1 of the electrode sheet ES unwound from the second electrode roll R2, and matches the data of the first roll map M1 collected from the second lane L2 of the electrode sheet ES before being wound onto the second electrode roll R2 with the data of the second roll map M2 collected from the second lane L2 of the electrode sheet ES unwound from the second electrode roll R2, and The data of the first roll map M1 collected from the third lane L3 of the electrode sheet ES before being wound onto the roll R2 can be matched with the data of the second roll map M2 collected from the third lane L3 of the electrode sheet ES unwound from the second electrode roll R2, and the data of the first roll map M1 collected from the fourth lane L4 of the electrode sheet ES before being wound onto the second electrode roll R2 can be matched with the data of the second roll map M2 collected from the fourth lane L4 of the electrode sheet ES unwound from the second electrode roll R2.

[0216] 11 and 14, in a bottom-winding and top-unwinding case as indicated by arrow T21, the server 1020 can be configured to match data of a first roll map M1 collected from the top surface ESU of the electrode sheet ES before it is wound onto the second electrode roll R2 with data of a second roll map M2 collected from the bottom surface ESB' of the electrode sheet ES wound onto the second electrode roll R2, and can be configured to match data of the first roll map M1 collected from the bottom surface ESB of the electrode sheet ES before it is wound onto the second electrode roll R2 with data of the second roll map M2 collected from the top surface ESU' of the electrode sheet ES wound onto the second electrode roll R2. The server 1020 can be configured to invert coordinates to match the start point S1 of the first roll map M1 to the end point T2 of the second roll map M2, and to match the end point T1 of the first roll map M1 to the start point S2 of the second roll map M2. The server 1020 may be configured to match the first role map M1 with the second role map M2 based on maintaining the order of the first to fourth lanes L1, L2, L3, and L4.The server 1020 matches the data of the first roll map M1 collected from the first lane L1 of the electrode sheet ES before being wound onto the second electrode roll R2 with the data of the second roll map M2 collected from the first lane L1 of the electrode sheet ES unwound from the second electrode roll R2, and matches the data of the first roll map M1 collected from the second lane L2 of the electrode sheet ES before being wound onto the second electrode roll R2 with the data of the second roll map M2 collected from the second lane L2 of the electrode sheet ES unwound from the second electrode roll R2, and The data of the first roll map M1 collected from the third lane L3 of the electrode sheet ES before being wound onto the roll R2 can be matched with the data of the second roll map M2 collected from the third lane L3 of the electrode sheet ES unwound from the second electrode roll R2, and the data of the first roll map M1 collected from the fourth lane L4 of the electrode sheet ES before being wound onto the second electrode roll R2 can be matched with the data of the second roll map M2 collected from the fourth lane L4 of the electrode sheet ES unwound from the second electrode roll R2.

[0217] As shown by arrows T11 and T22 in Figures 10 and 11, when the winding direction of the rewinder in the preceding roll-to-roll process and the unwinding direction of the unwinder in the subsequent roll-to-roll process are the same, the first roll map M1 and the second roll map M2 can be matched by matching the top surfaces with the top surfaces and the bottom surfaces with the bottom surfaces, and reversing the order of the first lane to the fourth lanes L1, L2, L3, and L4.

[0218] As shown by arrows T12 and T21, when the winding direction of the rewinder in the preceding roll-to-roll process and the unwinding direction of the unwinder in the subsequent roll-to-roll process are different from each other, the top surface of the first roll map M1 is matched with the bottom surface of the second roll map M2, the bottom surface of the first roll map M1 is matched with the top surface of the second roll map M2, and the first roll map M1 and the second roll map M2 can be matched in such a manner that the order of the first to fourth lanes L1, L2, L3, and L4 is maintained.

[0219] In some embodiments, the server 1020 may be configured to match the first role map M1 and the second role map M2, and then display the matched information on the display device 1030. In some embodiments, the server 1020 may be configured to additionally generate a single integrated role map by matching the first role map M1 and the second role map M2. In some embodiments, the server 1020 may be configured to match the first role map M1 and the second role map M2, and transmit a signal to the display device 1030 to display the single integrated role map.

[0220] In some embodiments, the first roll map M1 and the second roll map M2 may also include information about all removed portions. An electrode may be partially removed during a previous roll-to-roll process or a subsequent roll-to-roll process due to defects or other reasons. All of these removed portions of the electrode may be displayed in the first roll map M1 and the second roll map M2. A portion that remains valid after the roll-to-roll process without being removed is referred to as a surviving electrode portion. The first roll map M1 and the second roll map M2 may include not only surviving electrode portions but also removed portions.

[0221] Therefore, the removed portions of the first roll map M1 also exist as removed portions in the corresponding portions of the second roll map M2. Similarly, the surviving electrode portions of the second roll map M2 exist as surviving electrode portions in the corresponding portions of the first roll map M1. In some embodiments, the surviving electrode portions of the first roll map M1 may be partially removed in a subsequent roll-to-roll process, thereby existing as removed portions in the corresponding portions of the second roll map M2.

[0222] The present invention has been described in more detail above through the drawings and embodiments, etc. However, the configurations shown in the drawings or embodiments in this specification are merely one embodiment of the present invention and do not represent all of the technical ideas of the present invention, and therefore, there may be various equivalents and modifications that can replace them at the time of filing this application. [Explanation of symbols]

[0223] 10 Secondary battery manufacturing system 100 Rewinding Stage 111 Unwinder 113 Rewinder 115 Splicing Table 117 Scrapport 119 Processing equipment 121 1st rotary encoder 123 Second rotary encoder 131 NG sensor 133 Eye Sensor 135 Reference Point Sensor 140 Controller 141 First Controller 143 Second Controller 200 Coating Equipment 300 Roll pressing device 400 Slitting Machine 500 Notching Device 1020 Server 1030 Display device 1113 1st Rewinder 2111 No. 2 Unwinder

Claims

1. unwinding an electrode sheet from a first electrode roll and winding the electrode sheet onto a second electrode roll; collecting data on the unwinding direction of the first electrode roll; generating a second roll map for the second electrode roll based on a first roll map for the first electrode roll and the unwinding direction data for the first electrode roll.

2. The method for generating a roll map according to claim 1 , wherein the second roll map is generated by inverting coordinate values ​​of coordinate data of the first roll map.

3. 3. The method of generating roll maps of claim 2, wherein the start coordinate of the first roll map is calibrated to the end coordinate of the second roll map, and the end coordinate of the first roll map is calibrated to the start coordinate of the second roll map by inverting the coordinate values ​​of the coordinate data.

4. The method for generating a roll map according to any one of claims 1 to 3, wherein the first roll map includes winding direction data of the first electrode roll.

5. the electrode sheet includes an upper surface and a lower surface opposite the upper surface; the first roll map includes a portion corresponding to the upper surface of the electrode sheet and a portion corresponding to the lower surface of the electrode sheet; and The method of generating a roll map of claim 4 , wherein the second roll map includes a portion corresponding to the top surface of the electroded sheet and a portion corresponding to the bottom surface of the electroded sheet.

6. the unwinding direction of the first electrode roll is the same as the winding direction of the first electrode roll, a portion of the second roll map corresponding to the lower surface of the electrode sheet is generated based on a portion of the first roll map corresponding to the lower surface of the electrode sheet; and The method for generating a roll map according to claim 5 , wherein a portion of the second roll map corresponding to the upper surface of the electrode sheet is generated based on a portion of the first roll map corresponding to the upper surface of the electrode sheet.

7. the unwinding direction of the first electrode roll is opposite to the winding direction of the first electrode roll, a portion of the second roll map corresponding to the lower surface of the electrode sheet is generated based on a portion of the first roll map corresponding to the upper surface of the electrode sheet; and The method for generating a roll map according to claim 5 , wherein a portion of the second roll map corresponding to the upper surface of the electrode sheet is generated based on a portion of the first roll map corresponding to the lower surface of the electrode sheet.

8. combining the first input electrode roll and the second input electrode roll to provide an output electrode roll; collecting joint data for the output electrode roll; generating an output roll map for the output electrode roll based on the combined data, a first input roll map for the first input electrode roll, and a second input roll map for the second input electrode roll.

9. 9. The method for generating a roll map of claim 8, wherein the step of generating an output roll map generates a first inverted roll map by inverting coordinate values ​​of coordinate data of the first input roll map, and generates a second inverted roll map by inverting coordinate values ​​of coordinate data of the second input roll map.

10. 10. The method of generating a roll map of claim 9, wherein the first inverted roll map is incorporated into the output roll map.

11. 10. The method of generating a roll map of claim 9, wherein the coordinate data of the second inverted roll map is calibrated based on the ending coordinates of the first inverted roll map.

12. unwinding the electrode sheet from the first electrode roll; Discarding the defective portion of the electrode sheet; winding the electrode sheet onto a second electrode roll; collecting scrap data indicative of discarded portions of the electrode sheet; generating a second roll map for the second electrode roll based on a first roll map for the first electrode roll and the scrap data.

13. The method of generating a roll map of claim 12 , wherein the scrap data includes a start coordinate and a length of the portion of the electroded sheet that is discarded.

14. The method of generating a roll map according to claim 12 , wherein generating the second roll map includes inverting coordinate values ​​of coordinate data of the first roll map.

15. 14. The method of generating a roll map of claim 13, wherein the coordinate data of the second roll map is calibrated based on the starting coordinate and the length of the portion of the electroded sheet that is discarded.

16. unwinding an electrode sheet from a first electrode roll completed in a first roll-to-roll process, the electrode sheet including first and second lanes arranged in a horizontal direction; performing a second roll-to-roll process on the electrode sheet; winding the electrode sheet onto a second electrode roll; generating a second roll map for the second electrode roll, the second roll map including second data collected from the electrode sheet during the second roll-to-roll process and second coordinates that are matched to the second data and indicate positions within the electrode sheet; and and matching the first roll map of the first electrode roll with the second roll map based on a winding direction of the first electrode roll and an unwinding direction of the first electrode roll in the first roll-to-roll process, A method for generating a roll map, wherein the first roll map includes first data of the electrode sheet collected in the first roll-to-roll process and first coordinates that match the first data and indicate positions within the electrode sheet.

17. 17. The method of generating a roll map of claim 16, wherein the first roll-to-roll process is one of a roll pressing process and a slitting process.

18. 17. The method of generating a roll map of claim 16, wherein the second roll-to-roll process includes scrapping defective portions of the electroded sheet.

19. the first data of the first roll map collected from the top surface of the electroded sheet is matched with the second data of the second roll map collected from the top surface of the electroded sheet; and 17. The method of generating a roll map of claim 16, wherein the first data of the first roll map collected from the underside of the electroded sheet is matched with the second data of the second roll map collected from the underside of the electroded sheet.

20. In the first roll-to-roll process, the electrode sheet is wound onto the first electrode roll by top winding; and 20. The method of generating a roll map of claim 19, wherein in the second roll-to-roll process, the electrode sheet is unwound from the first electrode roll by top winding.

21. In the first roll-to-roll process, the electrode sheet is wound onto the first electrode roll by bottom winding; and 20. The method of generating a roll map of claim 19, wherein in the second roll-to-roll process, the electrode sheet is unwound from the first electrode roll by bottom winding.

22. The first data of the first roll map collected from the first lane of the electrode sheet is matched with the second data of the second roll map collected from the second lane of the electrode sheet; and 20. The method of generating a roll map of claim 19, wherein the first data of the first roll map collected from the second lane of the electrode sheet is matched with the second data of the second roll map collected from the first lane of the electrode sheet.

23. the first data of the first roll map collected from the top surface of the electroded sheet is matched with the second data of the second roll map collected from the bottom surface of the electroded sheet; and 17. The method of generating a roll map of claim 16, wherein the first data of the first roll map collected from a bottom surface of the electroded sheet is matched with the second data of the second roll map collected from a top surface of the electroded sheet.

24. In the first roll-to-roll process, the electrode sheet is wound onto the first electrode roll by top winding; and 24. The method of generating a roll map of claim 23, wherein in the second roll-to-roll process, the electrode sheet is unwound from the first electrode roll by bottom winding.

25. In the first roll-to-roll process, the electrode sheet is wound onto the first electrode roll by bottom winding; and 24. The method of generating a roll map of claim 23, wherein in the second roll-to-roll process, the electrode sheet is unwound from the first electrode roll by top winding.

26. The first data of the first roll map collected from the first lane of the electrode sheet is matched with the second data of the second roll map collected from the first lane of the electrode sheet; and 24. The method of generating a roll map of claim 23, wherein the first data of the first roll map collected from the second lane of the electrode sheet is matched with the second data of the second roll map collected from the second lane of the electrode sheet.

Images