Rewinding table and secondary battery manufacturing system using same

Abstract

According to an exemplary embodiment, a rewinding apparatus is provided. The rewinding apparatus includes: an unwinder configured to unwind an electrode sheet from a first electrode roll; a scrap port configured to discard a defective portion of the electrode sheet; the rewinder is configured to wind the electrode sheet on a second electrode roll; a first rotary encoder configured to detect a length of the electrode sheet unwound by the unwinder to generate an input quantity signal; a second rotary encoder configured to detect a length of the electrode sheet wound by the rewinder to generate a winding amount signal; and a first controller configured to collect coordinate data indicative of a position on the electrode sheet based on the furling amount signal.

Description

TECHNICAL FIELD

[0001] The present application relates to a rewinding stage and a secondary battery manufacturing system including the same. This application claims the benefit of priority based on Korean Patent Application No. 10-2023-0102905 filed on August 7, 2023, and Korean Patent Application No. 110-2024-0103566 filed on August 5, 2024, the entire contents of which are incorporated herein by reference. BACKGROUND

[0002] Unlike primary batteries, secondary batteries can be charged and discharged multiple times. Secondary batteries have been widely used as an energy source for various types of wireless devices, such as handsets, laptop computers, and cordless vacuum cleaners. Recently, the main use of secondary batteries has developed from mobile devices to mobile travel, as the manufacturing cost per unit capacity of secondary batteries has significantly decreased due to improved energy density and economies of scale, and the range of battery electric vehicles (BEVs) has increased to the same level as fuel vehicles.

[0003] Secondary batteries are manufactured through an electrode process, an assembly process, and an activation process. Among these processes, the electrode process is a key process that determines the yield and performance of battery cells. The electrode process can include a coating process, a roll-pressing process, and a slitting process. In the coating process, an active material and an insulating material can be applied to the surface of a current collector. In the roll-pressing process, an electrode can be pressed by a press roller. In the roll-pressing process, the density, performance, and surface quality of the electrode can be determined. In the slitting process, the electrode can be cut into a plurality of electrodes according to the design of the battery cell. SUMMARY

[0004] TECHNICAL PROBLEM

[0005] The present application relates to providing a rewinding stage having improved reliability and traceability and a secondary battery manufacturing system including the same.

[0006] TECHNICAL SOLUTION

[0007] An example embodiment of the present application provides a rewinding stage including: an unwinder configured to unwind an electrode sheet from a first electrode roll; a scrap port configured to discard a defective portion of the electrode sheet; a rewinder configured to wind the electrode sheet into a second electrode roll; a first rotary encoder configured to sense a length of the electrode sheet unwound by the unwinder to generate an input amount signal; a second rotary encoder configured to sense a length of the electrode sheet wound by the rewinder to generate a winding amount signal; and a first controller configured to collect coordinate data indicating a position on the electrode sheet based on the winding amount signal.

[0008] The first controller can be configured to collect scrap data indicating a length of a scrap portion of the electrode sheet based on the input amount signal.

[0009] The rewinding apparatus can further include an NG sensor configured to sense an NG mark and an NG label on the electrode roll to generate an NG sensing signal.

[0010] The first controller can be configured to collect NG sensing data by associating the NG sensing signal with the coordinate data.

[0011] The first controller can be configured to control the unwinder and the rewinder based on the NG sensing data.

[0012] The rewinding apparatus can further include a second controller configured to control the unwinder and the rewinder based on the NG sensing data.

[0013] The rewinding apparatus can further include a joint sensor configured to sense a joint of the electrode roll to generate a joint sensing signal.

[0014] The first controller can be configured to collect joint sensing data by associating the joint sensing signal with the coordinate data.

[0015] The rewinding apparatus can further include a reference point sensor configured to sense a reference point on the electrode roll to generate a reference point sensing signal.

[0016] The first controller can be configured to collect reference point sensing data by associating the reference point sensing signal with the coordinate data.

[0017] The first controller can be configured to transmit the reference point sensing data to a server, and the server can be configured to generate a roll map indicating the electrode sheet based on the reference point sensing data.

[0018] The first controller can be configured to transmit the reference point sensing data to a second controller, and the second controller can be configured to control the unwinder and the rewinder.

[0019] The second controller can be configured to transmit the reference point sensing data to a server, and the server can be configured to generate a roll map indicating the electrode sheet based on the reference point sensing data.

[0020] An exemplary embodiment provides a secondary battery manufacturing system. The secondary battery manufacturing system includes a roll press apparatus configured to perform a roll press process, and a rewinding apparatus configured to process a first electrode roll processed by the roll press apparatus, wherein the rewinding apparatus includes an unwinder configured to unwind an electrode sheet from the first electrode roll, a scrap port configured to discard a defective portion of the electrode sheet, a rewinder configured to wind the electrode sheet into a second electrode roll, a first rotary encoder configured to sense a length of the electrode sheet unwound by the unwinder to generate an input amount signal, a second rotary encoder configured to sense a length of the electrode sheet wound by the rewinder to generate a winding amount signal, and a first controller configured to collect coordinate data indicating a position on the electrode sheet based on the winding amount signal.

[0021] The first controller can be configured to collect scrap data indicating a length of the discarded portion of the electrode sheet based on the input amount signal.

[0022] The secondary battery manufacturing system can further include an NG sensor configured to sense an NG mark and an NG label on the electrode roll to generate an NG sensing signal.

[0023] The first controller can be configured to collect NG sensing data by associating the NG sensing signal with the coordinate data.

[0024] The first controller can be configured to control the unwinder and the rewinder based on the NG sensing data.

[0025] The secondary battery manufacturing system can further include a second controller configured to control the unwinder and the rewinder based on the NG sensing data.

[0026] Advantageous Effects

[0027] An exemplary embodiment of the present application provides a rewinding table implementing feedback, feedforward, and tracking of an electrode process, and a secondary battery manufacturing system including the same.

[0028] Effects that can be achieved according to exemplary embodiments of the present application are not limited to the above-mentioned effects, and other effects not described herein will be clearly derived and understood by those of ordinary skill in the art to which exemplary embodiments of the present application belong from the following description. That is, those of ordinary skill in the art can derive unintended effects achieved when implementing exemplary embodiments of the present application from exemplary embodiments of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 A secondary battery manufacturing system according to an exemplary embodiment is illustrated.

[0030] Figure 2 A secondary battery manufacturing system according to an exemplary embodiment is illustrated.

[0031] Figure 3 A secondary battery manufacturing system according to an exemplary embodiment is illustrated. DETAILED DESCRIPTION

[0032] Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings. Prior to describing the embodiments of the present application, the terms or expressions used in the specification and claims should not be interpreted as being limited to commonly understood or defined in the commonly used dictionaries, and should be interpreted based on the principles according to the inventor's intention that the terms or expressions can be appropriately defined to best explain the present application.

[0033] Therefore, the embodiments set forth herein and the configurations shown in the drawings are merely examples of the present application, and do not reflect all technical ideas of the present application, and thus it should be understood that various equivalents and modifications of alternative configurations have been made on the submission date of the present application.

[0034] When it is determined that well-known configurations or functions related to the description of the present application will obscure the subject matter of the present application due to unnecessary details, the well-known configurations or functions are not described in detail.

[0035] Because the embodiments of the present application are provided in order to more fully explain the present application to those having ordinary skill in the art, the shapes, sizes, etc. of the components shown in the drawings can be exaggerated, omitted, or schematically shown for the sake of clarity. Therefore, the sizes or ratios of the components should not be understood to completely reflect the actual sizes or ratios.

[0036] (FIRST EMBODIMENT)

[0037] Figure 1 A secondary battery manufacturing system 10 according to an exemplary embodiment is illustrated.

[0038] Referring to Figure 1 The secondary battery manufacturing system 10 can include a rewinding apparatus 100, a coating apparatus 200, a roll-pressing apparatus 300, a slitting apparatus 400, and a slotting apparatus 500.

[0039] The electrode sheet unwound from the input electrode roll can be processed by the die coater of the coating apparatus 200, the press roll of the roll pressing apparatus 300, or the slitting knife of the slitting apparatus 400, and the processed electrode sheet can be wound into an electrode roll. Accordingly, each operation performed by the coating apparatus 200, the roll pressing apparatus 300, and the slitting apparatus 400 to produce an electrode of a secondary battery can be referred to as a roll-to-roll process.

[0040] The coating apparatus 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 to the electrode sheet ES. The electrode slurry can include an electrode active material, a conductive agent, a binder, and a solvent. The electrode slurry can be provided by dissolving the electrode active material, the conductive additive, the binder, etc. in the solvent.

[0041] The roll pressing apparatus 300 can perform a roll pressing process on the electrode sheet. The roll pressing process is a process of passing the electrode sheet ES coated with the electrode slurry between press rolls facing each other. By using the press rolls, the surface of the electrode can be planarized, and the binding force between the active material and the current collector can be increased.

[0042] The slitting apparatus 400 can perform a slitting process on the electrode sheet. The electrode sheet can be divided into a plurality of electrode sheets by the slitting process.

[0043] The roll-to-roll process is performed on the electrode sheet ES unwound from the first electrode roll ER1 and wound into the second electrode roll ER2, and thus the electrode process can be referred to as a roll-to-roll process.

[0044] The slotting apparatus 500 can cut the electrode sheet unwound from the electrode roll into the shape of an electrode of a battery cell. Accordingly, the unit electrode can be formed by the slotting apparatus 500. The slotting apparatus 500 can also perform a drying process on one of the electrode sheet and the unit electrode.

[0045] When the electrode sheet includes a defect, the defect of the electrode sheet can be removed. The defect of the electrode sheet can be removed by one of the roll pressing apparatus 300 and the rewinding apparatus 100.

[0046] A substantial process can not be performed on the electrode sheet by each of the rewinding apparatuses 100. Each of the rewinding apparatuses 100 can change the winding direction of the electrode sheet. Each of the rewinding apparatuses 100 can unwind the electrode sheet from the electrode roll, remove the defect of the electrode sheet unwound from the electrode roll, and rewind the electrode sheet from which the defect is removed. Accordingly, in addition to the defect removal portion of the electrode roll, the outside of the input electrode roll can be wound as the inside of the electrode roll to be output. Similarly, the inside of the input electrode roll can be wound as the outside of the electrode roll to be output.

[0047] The roll-pressing apparatus 300 can remove defects of the electrode sheet while performing a roll-pressing process, or remove only defects of the electrode sheet without performing the roll-pressing process. The operation of the roll-pressing apparatus 300 to remove only defects of the electrode sheet without performing the roll-pressing process is referred to as a rewinding mode. In the rewinding mode, each of the press rollers can be moved to a position spaced apart from the electrode.

[0048] When the electrode roll is sequentially processed by the coating apparatus 200, the roll-pressing apparatus 300, the slitting apparatus 400, and the slotting apparatus 500, a unit electrode can be provided. After the roll-pressing apparatus 300 performs the roll-pressing process, the wide unit electrode can be directly transferred to the slotting apparatus 500 without being slit by the slitting apparatus 400.

[0049] When the defects of the electrode roll processed by the coating apparatus 200 are excessive, the defects of the electrode roll can be removed by the roll-pressing apparatus 300. The excessive defects of the electrode roll processed by the coating apparatus 200 can include a large number of folded joints and loop defects.

[0050] When the defects of the electrode roll processed by the roll-pressing apparatus 300 are excessive, the defects of the electrode roll can be removed by one of the roll-pressing apparatus 300 and the rewinding apparatus 100 operating in the rewinding mode. Next, the electrode roll with reduced defects (or no defects) can be input to the slitting apparatus 400. The excessive defects of the electrode roll processed by the roll-pressing apparatus 300 can include a winding deviation and a number of defect labels exceeding an upper limit.

[0051] When the defects of the electrode roll processed by the slitting apparatus 400 are excessive, the defects of the electrode roll can be removed by the rewinding apparatus 100. Next, the electrode roll with reduced defects (or no defects) can be input to the slotting apparatus 500. The excessive defects of the electrode roll processed by the slitting apparatus 400 can include a number of defect labels exceeding an upper limit.

[0052] Here, each of the rewinding apparatuses 100 can enable an online function. Each of the rewinding apparatuses 100 can be configured to discard defects of the electrode roll and collect discard data indicating a length of a discarded portion of the electrode roll. Accordingly, the length of the portion of the electrode discarded by the rewinding apparatus 100 can be updated, and traceability of the secondary battery manufacturing process can be improved.

[0053] Figure 2 A secondary battery manufacturing system 10 according to an exemplary embodiment is illustrated.

[0054] Reference Figure 2 The secondary battery manufacturing system 10 can include the rewinding apparatuses 100, a server 1010, a server 1020, and a display device 1030.

[0055] The rewinding apparatus 100 can 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 fiducial sensor 135, a first controller 141, and a second controller 143.

[0056] The secondary battery manufacturing system 10 can be configured to generate a roll map including data about the electrode sheet ES. The roll map can represent the electrode sheet ES based on coordinates indicating positions on the electrode sheet ES. As described below, a secondary battery manufacturing process can be performed on the electrode sheet ES. The roll map can include data representing a history of processes performed on the electrode sheet ES and related to the coordinates. Accordingly, the roll map enables feedback, feedforward, and tracking of the secondary battery manufacturing process (as described below).

[0057] A first electrode roll ER1 on which a previous process is performed can be loaded on 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 rewind the electrode sheet ES to form a second electrode roll ER2. The electrode sheet ES can be rewound into the second electrode roll ER2 and cut and separated after reaching a certain rewinding length. Accordingly, the electrode sheet ES can move between the unwinder 111 and the rewinder 113.

[0058] The roll map can be generated in units of a lot. A lot is a production unit of a roll-to-roll process, and the separated second electrode roll ER2 is an embodiment of the lot. The first electrode roll ER1 newly loaded on the unwinder 111 is also an embodiment of the lot. Accordingly, 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. In addition, the server 1020 can be configured to generate a second roll map of the second electrode roll ER2 based on processing of the rewinding apparatus 100. The second roll map can correspond to the second electrode roll ER2.

[0059] As a non-limiting embodiment, the second roll map can be generated by loading and updating the first roll map. Alternatively, the second roll map can be generated based on data generated by the rewinding apparatus 100 without loading the first roll map.

[0060] In the roll map, time series data constructed over time (i.e., according to progress of the process) can be associated with coordinate data based on an amount of movement (i.e., a winding amount or an input amount) of the electrode sheet ES.

[0061] Manufacturing of secondary batteries involves a series of different processes, and a previous process affects a subsequent process. In this case, when time series data of a previous process does not directly match a real workpiece, intermediate product, and product, it is difficult to reflect the time series data of the previous process in a subsequent process. Hereinafter, correction of a subsequent process based on data generated from a result of a previous process will be referred to as feedforward.

[0062] Here, the workpiece is an article provided as a result of each process, for example, an electrode sheet ES that performs a coating process, a roll-pressing process, and a slitting process. Figure 1 The intermediate product can be an electrode, a separator cut by a slotting process, and one of assemblies thereof. The intermediate product can be a structure including a case and an electrode assembly included in the case (in some cases, the structure further includes an electrolyte). The product is an article processed by an activation process to be usable as a secondary battery. The above definitions of the workpiece, the intermediate product, and the product are only in one aspect of their definitions, and thus should not be construed as excluding their general definitions.

[0063] The electrode process of a secondary battery includes a series of roll-to-roll processes. For feedforward, time series data should be related to a position on a real workpiece, component, intermediate product, and product. Here, the feedforward can include controlling a process regarding an electrode sheet ES based on a roll map of a first electrode roll ER1 generated in a previous process. The roll map can allow time series data to be associated with coordinate data including coordinates of a position on a real workpiece, component, intermediate product, and product. The roll map can provide a match between time series data and a real workpiece, component, intermediate product, and product based on the coordinate data. Accordingly, generation of the roll map and feedforward based on the roll map can improve production efficiency and quality by digitizing and objectifying various aspects of a process depending on an operator's judgment.

[0064] A roll map of a previous batch can be used to improve a process of a subsequent batch, and this operation can be referred to as process feedback. Process feedback using a roll map can include identifying process conditions and process parameters that cause problems and defects based on data included in the roll map. For example, a roll map of a first electrode roll ER1 processed in a current process can include defect data DD, and the rewinding apparatus 100 can discard an electrode sheet ES unwound from the first electrode roll ER1 based on the defect data DD.

[0065] Further, as described below, a roll chart can be generated cumulatively for the workpiece, intermediate product, and product of the unit process to track the process history of the product on the market (e.g., a battery cell, a battery module, or a battery pack). For example, a battery cell can include an electrode assembly or a cell identifier (ID) on a case. The cell ID can include lot and coordinate information of electrodes and separators included in the battery cell. In other words, the cell ID can be related to a roll chart of the electrodes and separators included in the battery cell. Accordingly, when an event (e.g., a quality problem) occurs in the battery cell on the market, historical data of the manufacturing of the battery cell can be retrieved based on the cell ID.

[0066] The first rotary encoder 121 can be configured to sense an amount of the portion of the electrode sheet ES unwound from the first electrode roll ER1 by the unwinder 111. Accordingly, the first rotary encoder 121 can be configured to generate an input amount signal UWAS indicating a length of the portion of the electrode sheet ES unwound by the unwinder 111. The first rotary encoder 121 can be configured to transmit the input amount signal UWAS to the first controller 141.

[0067] The second rotary encoder 123 can be configured to sense an amount of the portion of the electrode sheet ES wound into the second electrode roll ER2 by the rewinder 113. Accordingly, the second rotary encoder 123 can be configured to generate a winding amount signal WAS indicating a length of the portion of the electrode sheet ES wound by the rewinder 113. The second rotary encoder 123 can be configured to transmit the winding amount signal WAS to the first controller 141.

[0068] As described below, a portion of the electrode sheet ES can be discarded. Accordingly, the length of the portion of the electrode sheet ES unwound by the unwinder 111 can be different from the amount of the portion of the electrode sheet ES wound by the rewinder 113.

[0069] The first controller 141 can be configured to collect coordinate data of the electrode sheet ES based on the winding amount signal WAS and / or the input amount signal UWAS of the electrode sheet ES. For example, the first controller 141 can determine a moving distance of the electrode sheet ES based on the input amount signal UWAS of the electrode sheet ES, and thus can be configured to determine a position of the portion of the electrode sheet ES to be unwound by the unwinder 111 on the electrode sheet ES at each point of time at which an event occurs in the electrode sheet ES. As another example, the first controller 141 can determine a moving distance of the electrode sheet ES based on the winding amount signal WAS of the electrode sheet ES, and thus can be configured to determine a position of the portion of the electrode sheet ES to be wound by the rewinder 113 on the electrode sheet ES at each point of time at which an event occurs in the electrode sheet ES. As another example, the first controller 141 can determine a moving distance of the first electrode sheet ES1 based on each of the winding amount signal WAS and the input amount signal UWAS.

[0070] Here, the event can include all processes, inspections, and measurements performed by the rewinding apparatus 100 on the electrode sheet ES, such as cutting the electrode sheet ES, joining a portion of the electrode sheet ES, sensing a reference point on the electrode sheet ES, and sensing a defect tag on the electrode sheet ES. Hereinafter, the technical idea of the present application will be described with respect to an embodiment in which the first controller 141 collects coordinate data based on a winding amount signal WAS of the electrode sheet ES, as a non-limiting embodiment.

[0071] The coordinate data can include coordinates matched with each portion of the electrode sheet ES. That is, each of arbitrary points on the electrode sheet ES can be matched with coordinates. The coordinates can be one-dimensional (1D) amounts in a longitudinal direction of the electrode sheet ES, but are not limited thereto. The coordinates can be two-dimensional (2D) amounts in a length direction and a Y-axis direction in a width direction of the electrode sheet ES.

[0072] The NG sensor 131 can be configured to sense one of an NG mark and an NG tag on the electrode sheet ES. The NG mark can be formed by, for example, an inkjet printer, and can include information about a location and a type of a defect. The NG tag can be attached to the electrode sheet ES by an operator or an NG tag attacher. The NG tag can indicate a location of a defect of the electrode sheet ES. As a non-limiting embodiment, the NG sensor 131 can be a color sensor or a vision machine. The NG sensor 131 can be configured to generate an NG sensing signal NSS. The NG sensor 131 can be configured to transmit the NG sensing signal NSS to the first controller 141.

[0073] The first controller 141 can be configured to collect NG sensing data NSD based on the NG sensing signal NSS. The first controller 141 can be configured to associate the NG sensing signal NSS with the coordinate data to collect the NG sensing data NSD. The NG sensing data NSD can include, for example, a defect value indicating whether there is a defect and an aspect of the defect, and coordinates matched with the defect value.

[0074] To collect the NG sensing data NSD, the coordinate data can be calibrated based on the offset length OLI. The calibration of the coordinate data includes compensating for a difference between a portion of the electrode sheet ES sensed by the first rotary encoder 121 (i.e., a portion of the electrode sheet ES wound by the rewinder 113) and a portion of the electrode sheet ES sensed by the NG sensor 131.

[0075] According to an exemplary embodiment, the first controller 141 can calibrate the coordinate data collected simultaneously with the NG sensing signal NSS based on the offset length OLI, and associate the calibrated coordinate data with the NG sensing signal NSS to collect the NG sensing data NSD. The processor 131P can be configured to transmit the NG sensing data NSD to the first controller 141.

[0076] The offset length OL1 is a length of the electrode sheet ES between the NG sensor 131 and the rewinder 113 according to a moving path of the electrode sheet ES. The offset length OL1 can be equal to or greater than a straight line distance between the NG sensor 131 and the rewinder 113.

[0077] The second controller 143 can be configured to control operations of the unwinder 111, the rewinder 113, the scrap port 117, and the processing device 119. The second controller 143 can be configured to generate a signal for operating or stopping the unwinder 111, the rewinder 113, the scrap port 117, and the processing device 119. The signal for operating or stopping the unwinder 111, the rewinder 113, the scrap port 117, and the processing device 119 can be generated based on a subject including details of the product ID and the manufacturing recipe.

[0078] The second controller 143 can receive the NG sensing data NSD from the first controller 141. The second controller 143 can be configured to receive the defect data DD from the server 1020. The defect data DD can be loaded to the second controller 143 via the server 1010. Here, the defect data DD can indicate a location of a defect on the first electrode roll ER1. The defect data DD can be included in the first roll map of the first electrode roll ER1.

[0079] The second controller 143 can be configured to generate a signal for operating or stopping the unwinder 111, the rewinder 113, the scrap port 117, and the processing device 119 based on the NG sensing data NSD and the defect data DD. When a defect of the electrode sheet ES2, which is identified using the defect data DD and the NG sensing data NSD, approaches the splicing table 115, the second controller 143 can be configured to reduce a moving speed of the electrode sheet ES or to generate a signal for stopping unwinding by the unwinder 111 and winding by the rewinder 113.

[0080] After cutting a starting point of the defect (or a point adjacent to the starting point of the defect in consideration of a process margin) on the splicing table 215, the scrap port 217 can be configured to wind a defective portion DES of the electrode sheet ES as shown by a thick dotted line. After the defective portion DES of the electrode sheet ES is sufficiently wound by the scrap port 117, a portion of the electrode sheet ES connected to the scrap port 117 and a portion of the electrode sheet ES connected to the unwinder 111 can be separated from each other. Next, the current process can be continued by connecting 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. 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 connected on the splicing table 115.

[0081] Conventionally, the electrode sheet is wound without discarding the defect, or although the defect is discarded, the defective portion is still remained in the electrode sheet. According to an exemplary embodiment, the defective portion DES of the electrode sheet ES is discarded based on the NG sensing data NSD and the defect data DD, and thus the reliability and traceability of the discarded electrode sheet ES can be improved.

[0082] To discard the defective portion DES of the electrode sheet ES, the unwinder 111 and the rewinder 113 can be stopped, and the defective portion DES of the electrode sheet ES can be moved to the scrap port 117 by driving the unwinder 111 without driving the rewinder 113. The first controller 141 can be configured to collect scrap data SD based on the unwinding amount signal UWAS after the discard of the defective portion DES of the electrode sheet ES is initiated. To collect the scrap data SD, the first controller 141 can receive a signal for controlling the operation of the unwinder 111 and the rewinder 113 from the second controller 143. As another embodiment, the first controller 141 can be configured to collect the scrap data SD based on the rotation amount of a driving roller of the scrap port 117. As another embodiment, the first controller 141 can be configured to collect the scrap data SD based on the distance between reference points on the electrode sheet ES and the change in the distance between the joint point and the reference points on the electrode sheet ES.

[0083] Conventionally, the amount of the portion of the electrode sheet to be discarded is determined subjectively by an operator, or is determined based on the weight of the discarded portion of the electrode sheet, and thus the accuracy of the amount of the portion of the electrode sheet to be discarded is low, and the traceability of the process is reduced. According to an exemplary embodiment, the handling process depending on the subjectivity of the operator can be objectified by collecting the scrap data SD indicating the position and the amount of the discarded defective portion DES of the electrode sheet ES based on the input amount signal UWAS. Thus, the reliability and traceability of the manufacturing of the secondary battery can be improved.

[0084] The joint sensor 133 can be configured to sense the joint of the electrode sheet ES to generate a joint sensing signal JSS. The joint of the electrode sheet ES can be joined together after the defective portion DES of the electrode sheet ES is discarded. As a non-limiting embodiment, the joint sensor 131 can be a color sensor or a vision machine. The joint sensor 133 can be configured to transmit the joint sensing signal JSS to the first controller 141.

[0085] The first controller 141 can be configured to collect joint sensing data JSD based on the joint sensing signal JSS. The first controller 141 can be configured to collect the joint sensing data JSD by associating the joint sensing signal JSS with the coordinate data.

[0086] According to an exemplary embodiment, the first controller 141 can calibrate coordinate data collected simultaneously with the joint sensing signal JSS based on the offset length OL2, and associate the calibrated coordinate data with the joint sensing signal JSS to collect joint sensing data JSD.

[0087] The offset length OL2 is a length of the electrode sheet ES between the joint sensor 133 and the rewinder 113 according to a movement path of the electrode sheet ES. The offset length OL2 can be equal to or greater than a straight-line distance between the joint sensor 133 and the rewinder 113.

[0088] The reference point sensor 135 can be configured to sense a reference point on the electrode sheet ES to generate a reference point sensing signal DSS. The reference points can be formed at a set interval on the electrode sheet ES to indicate positions on the electrode sheet ES. Each reference point can be, for example, a 2D barcode including information about a sequence of formation. Accordingly, the reference point sensing signal DSS can include a time value corresponding to sensing of the reference points and a sequence value of the reference points. The reference point sensor 135 can be configured to transmit the reference point sensing signal DSS to the first controller 141.

[0089] The first controller 141 can be configured to collect reference point sensing data DSD based on the reference point sensing signal DSS. The first controller 141 can be configured to collect the reference point sensing data DSD by associating the reference point sensing signal DSS with the coordinate data.

[0090] According to an exemplary embodiment, the first controller 141 can be configured to calibrate coordinate data collected simultaneously with the reference point sensing signal DSS based on the offset length OL3, and associate the calibrated coordinate data with the reference point sensing signal DSS to collect the reference point sensing data DSD.

[0091] The offset length OL3 is a length of the electrode sheet ES between the reference point sensor 135 and the rewinder 113 according to a movement path of the electrode sheet ES. The offset length OL3 can be equal to or greater than a straight-line distance between the reference point sensor 135 and the rewinder 113.

[0092] According to an exemplary embodiment, data generated based on the scrap data SD, the NG sensing data NSD, and events of the electrode sheet ES can be calibrated based on the reference point sensing data DSD.

[0093] The rewinding apparatus 100 can further include a measurement device and an inspector. Each of the measurement device and the inspector can include a sensing part and a processor. The measurement device can be configured to generate measurement data, and the inspector can be configured to generate inspection data. The processor of the inspector and the processor of the measurement device can be connected to the sensing part of the inspector and the sensing part of the measurement device, respectively, by wire or wirelessly.

[0094] The measurement data can include a plurality of measured values represented by numbers. For example, the measurement data can include size data (e.g., thickness and width of the electrode sheet ES), data of a loading amount of the coating material on the electrode sheet ES, size data (e.g., width of the insulating material on the coating material and overlap width between the coating material and the insulating material), data of a mismatch between the coating lane on the top surface of the electrode sheet ES and the coating lane on the bottom surface of the electrode sheet ES, etc. Here, the loading amount is an amount of the coating material loaded per unit area of the electrode sheet ES, and can be an areal density of the coating material.

[0095] The inspection data collected by the inspector can include process events and results of judging the quality of a portion of the electrode sheet ES. For example, the inspection data can include data on appearance of the electrode sheet ES collected by an image-based inspection device such as a vision machine, data on disconnections and joints on the electrode sheet ES, data on a portion of the electrode sheet ES that is subjected to sampling inspection, data on a portion of the electrode sheet ES to be discarded, data on a discarded portion of the electrode sheet ES, data on whether the coating material and the insulating material on the electrode sheet ES are defective, data on a reference point indicating a position of the electrode sheet ES, and defect data such as pinhole defects, pit defects, line defects, crack defects, side ring defects, island defects, fold defects, wrinkle defects, scar defects, and scratch defects. The reference point can be formed on the electrode sheet ES at certain intervals, and other elements on the electrode sheet ES can be positioned based on the reference point. The inspector can be a color sensor, a joint sensor, a reference point sensor, or a vision machine.

[0096] The above-described measurement data and inspection data can be time-series data. The measurement data and the inspection data can be time-ordered. Time-ordering is a main feature of time-series data, and is to organize events in the order of occurrence and reaching to be processed. That is, the measurement data and the inspection data can be stored based on time points at which the measurement and the inspection are made, and can be time-related. Accordingly, each measured value of the measurement data can be matched with a time, and each inspection value of the inspection data is matched with a time stamp.

[0097] For example, data of a measurement amount (e.g., a loading amount on the electrode sheet ES or a thickness of the electrode sheet ES) can include a series of measurement amounts (e.g., a loading amount on the electrode sheet ES or a thickness of the electrode sheet ES) and time values related to the series of measurement amounts. The measured amounts and the time values can be matched in a one-to-one manner, but are not limited thereto. As another example, defect data can include a value indicating a defect and a time value related to the value indicating the defect. Here, the value indicating the defect is understood to mean that the value includes information on at least one of presence of the defect and a type of the defect.

[0098] Whether a measured portion of the electrode sheet ES is defective can be determined by processing the measurement data by means of a setting method. When the amount of the coating material measured on the electrode sheet ES (e.g., the loading amount 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 can be determined as a good portion. When the amount of the coating material measured on the electrode sheet ES (e.g., the loading amount on the electrode sheet ES or the thickness of the electrode sheet ES) is less than the lower limit or greater than the upper limit, the corresponding portion of the electrode sheet ES can be determined as being defective.

[0099] The sensing portion of the measurement device and the sensing portion of the inspector can be configured to sense a physical quantity of the electrode sheet ES to generate a measurement signal. For example, the sensing portion can include a time delay and integration (TDI) camera, a complementary metal-oxide semiconductor (CMOS) image sensor, a time-of-flight (TOF) sensor, etc. The sensing portion can include a transmitter and a receiver configured to measure using a non-destructive signal such as an ultrasonic wave, a microwave, a terahertz wave, or an infrared ray. The sensing portion can include analog and / or digital sensors such as a biosensor, a chemical sensor, a composition sensor, a current and / or power meter, an air quality sensor, a gas sensor, a Hall effect sensor, a brightness level sensor, and an optical sensor. The measurement device can include a pressure sensor, a temperature sensor, an ultrasonic sensor, a proximity sensor, a door status sensor, a motion tracking sensor, a humidity sensor, a color sensor, an OCR reader, a visible light and infrared sensor, a camera, etc.

[0100] The processor can be configured to collect the inspection signal and the measurement signal sensed by the sensing portion to generate inspection data and measurement data. The processor can be wired or wirelessly connected to the sensing portion. The processor of the measurement device can be configured to calibrate the measurement data by adding an offset measurement amount to each of a plurality of measured values of the measurement data. The measured values of the measurement data can be different from actual values due to the progress of processing and the aging of the equipment. The processor can calibrate the measurement data based on the offset measurement amount. The offset measurement amount can be determined based on information about the equipment system obtained by means of a method such as a sampling test.

[0101] According to an exemplary embodiment, the inspector and the measurement device can be configured to calibrate coordinate data based on their positions. More specifically, the inspector and the measurement device can be configured to calibrate the coordinate data based on offset lengths, associating the coordinates of the coordinate data with the measured values of the measurement data. The calibration of the coordinate data by the inspector and the measurement device is similar to the calibration using the offset lengths OL1, OL2, and OL3.

[0102] The processor of the measuring device can be configured to collect evaluation data based on the measurement data. The evaluation data can be collected based on a comparison between the measured values of the plurality of segments of the electrode sheet ES and a set range. For example, a measured value (or average value) within a first range can be determined to be normal, a measured value (or average value) within a second range greater than the first range can be determined to be excessive, a measured value (or average value) within a third range greater than the second range can be determined to be very excessive, a measured value (or average value) within a fourth range less than the first range can be determined to be insufficient, and a measured value (or average value) within a fifth range less than the fourth range can be determined to be very insufficient.

[0103] Here, when the lower limit of the second range is greater than or equal to the upper limit of the first range, the second range is greater than the first range. Similarly, when the upper limit of the fourth range is less than or equal to the lower limit of the first range, the fourth range is less than the first range.

[0104] The first controller 141 can be in operable communication with the first and second rotary encoders 121, 123, the NG sensor 131, the joint sensor 133, the fiducial point sensor 135, and additional measuring devices and inspectors via a wired or wireless data network. The data network can be unidirectional or bidirectional. The data network can implement the first and second rotary encoders 121, 123, the NG sensor 131, the joint sensor 133, the fiducial point sensor 135, and additional measuring devices and inspectors by a physical channel, WiFi, a public network, and / or a dedicated network using Bluetooth or other frequency bands. The first and second rotary encoders 121, 123, the NG sensor 131, the joint sensor 133, the fiducial point sensor 135, and additional measuring devices and inspectors can be configured to collect data from devices, workpieces, intermediate products, and products in the rewinding apparatus 100, or generate signals for collecting data therefrom.

[0105] The first controller 141 can be configured to transmit the NG sensing data NSD, the joint sensing data JSD, the scrap data SD, and the fiducial point sensing data DSD to the second controller 143. The NG sensing data NSD, the joint sensing data JSD, the scrap data SD, and the fiducial point sensing data DSD can be transmitted to the server 1020 via the second controller 143 and the server 1010. The second controller 143 and the server 1010 can relay data communication (including the NG sensing data NSD, the joint sensing data JSD, the scrap data SD, and the fiducial point sensing data DSD) between the server 1020 and the first controller 141. However, the present application is not limited thereto, and the first controller 141 can directly transmit the NG sensing data NSD, the joint sensing data JSD, the scrap data SD, and the fiducial point sensing data DSD to the server 1020.

[0106] To control the process, a communication line can be installed between the second controller 143 and the server 1020 to connect the second controller 143 and the server 1020 via the server 1010. Thus, data transmission with the second controller 143 can reduce resources required to install a communication line and ensure efficient data processing and management, compared to a case where the first rotary encoder 121 and the second rotary encoder 123 and the reference point sensor 135 directly transmit the input amount signal UwAS, the winding amount signal WAS, and the measurement signal to the server 1020 and a case where the first controller 141 directly transmits the measurement data CMD and the evaluation data ED to the server 1020.

[0107] The server 1010 can be a communication server. The server 1010 can include a program for communication between the second controller 143 for the manufacturing apparatus and the server 1020 as a higher server. The server 1010 can be implemented by hardware as described below. The language and protocol of the server 1020 can be different from those of the second controller 143. For example, the language of the server 1020 can be SQL, and the language of the second controller 143 can be a ladder diagram.

[0108] The server 1020 can be configured to generate a roll map based on the NG sensing data NSD, the joint sensing data JDS, the scrap data SD, and the reference point DSD. The roll map can be generated in units of batches. The roll map can include data on specifications of the batches. The specifications of the batches can include, for example, a batch number, a length of the wound electrode sheet ES, a width of the electrode sheet ES, and materials and compositions used to process the electrode sheet ES.

[0109] According to an exemplary embodiment, the server 1020 can be a data processing system that supports management of all activities required for manufacturing of a secondary battery, such as work schedule management, work instructions, quality control, and work performance aggregation. The server 1020 can be, for example, a manufacturing execution system (MES). The server 1020 can be configured to perform input, processing, output, and communication of data required for electrode manufacturing including a coating process, a pressing process, and a manufacturing process.

[0110] According to other exemplary embodiments, the server 1020 can be configured to store and process raw measurement data. The server 1020 can manage quality of processing the electrode sheet ES by continuously monitoring processing of the electrode sheet ES based on inspection data. According to an exemplary embodiment, the server 1020 can be a static process controller (SPC). The server 1020 can collect and analyze manufacturing data in almost real time, identify problematic conditions in a timely manner, and provide a notification to an operator before a potential problem occurs.

[0111] According to other exemplary embodiments, the server 1020 can be, for example, a data warehouse, and store the NG sensing data NSD, the scrap data SD, and the coordinate data for a long time based on a quality assurance period of a product.

[0112] According to other exemplary embodiments, in order to create a roll map, the server 1020 can be provided separately from the MES, the SPC, and the data warehouse.

[0113] The first controller 141 and the second controller 143 can be programmable logic controllers (PLCs). A PLC is a special type of microprocessor-based controller that uses programmable memory for storing instructions and implements functions such as logic, sequencing, timing, counting, and arithmetic for controlling machines and processes. PLCs are easy to operate and program.

[0114] The servers 1010 and 1020 can be implemented by hardware, firmware, software, or a combination thereof. For example, the servers 1010 and 1020 can be computing devices such as workstation computers, desktop computers, laptop computers, and tablet computers. The servers 1010 and 1020 can include simple controllers, complex processors such as microprocessors, CPUs, or GPUs, processors configured by software, special hardware, or firmware. The servers 1010 and 1020 can be implemented, for example, by general-purpose computers or special-purpose hardware such as digital signal processing (DSP), field-programmable gate arrays (FPGA), or application-specific integrated circuits (ASIC).

[0115] The server 1020 can include a physical server or a cloud server. The server 1020 can provide data and analysis results to an operator by means of various frameworks. The frameworks can include protocols that support data transmission so that the display device 1030 can visualize data by means of a user interface and provide updated visualizations as the server 1020 computes new data. The protocols that support data transmission can include HTML, JavaScript, and / or JSON.

[0116] The server 1020 can include various application programming interfaces (APIs) and other data management tools to store data in a database. The APIs can also be used to retrieve data from databases of various data management systems. The data management systems can provide access to databases, extract or retrieve data from databases, and generate metrics. Here, a metric is a tool for visualizing data. The metrics can include measured values generated in a time series manner and can be used to monitor applications and generate status warnings.

[0117] The server 1020 can transmit a visualization command VC to the display device 1300, and the display device 1300 can visualize and display the visualized roll map.

[0118] The reeling apparatus 100 can implement a plug-in architecture with an API for obtaining data to provide a plug-and-play connection between the measuring device and the inspector. Thus, resources in a specific process step and a specific station can be easily transferred to a different process, and different stations or new resources can be easily introduced into each process step and each station.

[0119] The data network between the components of the secondary battery manufacturing system 10 can include various types of communication channels, including one-way and two-way wired and wireless communications. For example, the data network can include an industrial protocol network, such as OPC, Modbus, or ProfiNet. The communication channels can be channels for dedicated pipe communication, such as Universal Serial Bus (USB), IEEE 802 (Ethernet), IEEE 1394 (FireWire), or other high-speed data communication standards.

[0120] In some embodiments, the secondary battery manufacturing system 10 can further include a manual input system that allows an operator to input manufacturing data. The secondary battery manufacturing system 10 can allow the operator to input data using input tools and computer-based input of manufacturing data, such as Excel file grabbing. The manual input system can be, for example, a human-machine interface (HMI) of a supervisory control and data acquisition (SCADA). In general, the SCADA can include a combination of software and hardware, such as a PLC and a remote terminal unit (RTU). The HMI is a screen that supports communication between the operator and the SCADA system, and is a key element of the SCADA system. For example, the manual input of the HMI can include selecting a defect type and reflecting performance at the time of completion.

[0121] According to some embodiments, the operations of the first controller 141, the second controller 143, the server 1010, and the server 1020 can be implemented as instructions stored on a machine-readable medium readable and executable by one or more processors. Here, the machine-readable medium can include any device for storing and / or transmitting information in a form readable by a machine (e.g., a computing device). Examples of the machine-readable medium can include read-only memory (ROM), random access memory (RAM), magnetic disk storage media, optical storage media, flash memory, electrical, optical, acoustic, or other types of wireless radio signals (e.g., carrier waves, infrared signals, digital signals, etc.), and other signals.

[0122] The first controller 141, the second controller 143, the server 1010, and the server 1020 can include firmware, software, routines, and instructions to perform the above-described operations or processes, which will be described below. For example, the first controller 141, the second controller 143, the server 1010, and the server 1020 can be embodied in a memory.

[0123] The first controller 141 can be implemented by software configured to receive the input amount signal UwAs, the winding amount signal WAS, the NG sensing signal NSS, the joint sensing signal JSS, and the reference point sensing signal DSS, collect coordinate data, NG sensing data NSD, joint sensing data JSD, scrap data SD, and reference point sensing data DSD, and transmit the NG sensing data NSD, the joint sensing data JSD, and the reference point sensing data DSD.

[0124] The second controller 143 can be implemented by software configured to generate control signals for controlling the unwinder 111, the rewinder 113, the scrap port 117, and the processing apparatus 119 based on the product ID, the product recipe, the defect data DD, and the NG sensing signal NSS, receive the NG sensing data NSD, the joint sensing data JSD, the scrap data SD, and the reference point sensing data DSD, and transmit the NG sensing data NSD, the joint sensing data JSD, the scrap data SD, and the reference point sensing data DSD.

[0125] The server 1010 can be implemented by software for relaying transmission of data and information between the second controller 143 and the server 1020. More specifically, the server 1010 can be implemented by software configured to control a communication flow between the second controller 143 and the server 1020 and perform error control, synchronization, sequence control, addressing, multiplexing, routing, format conversion, etc.

[0126] The server 1020 can be implemented by, for example, software configured to transmit the product ID and the product recipe to the second controller 143 and generate a roll map based on the NG sensing data NSD, the joint sensing data JSD, the scrap data SD, and the reference point sensing data DSD.

[0127] However, the above description is provided only for convenience of description, and the first controller 141, the second controller 143, the server 1010, and the server 1020 can also be produced by a computing device, a distributed computing device, a processor, firmware, software, routines, and other devices that execute routines and instructions.

[0128] The architecture of the secondary battery manufacturing system 10 configured to generate a roll map can be implemented by adding only the first controller 141 to the second controller 143, the server 1010, and the server 1020, which are essential elements in a modern process management system. That is, the system according to the exemplary embodiment can use resources of a manufacturing site that has already been installed and reduce additional capital expenditure. In addition, applying the same architecture as the existing manufacturing apparatus to a newly constructed manufacturing apparatus can make it possible to improve manufacturing reliability of secondary batteries, sense / improve problematic processes, and effectively introduce new processes.

[0129] (Second Embodiment)

[0130] Figure 3 A secondary battery manufacturing system 11 according to an exemplary embodiment is shown.

[0131] Referring to Figure 3 , the secondary battery manufacturing system 11 can include a rewinding apparatus 100, a server 1010, a server 1020, and a display device 1030.

[0132] The server 1010, the server 1020, and the display device 1030 are substantially the same as those described above with reference to Figure 2 .

[0133] The rewinding apparatus 101 can 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, the server 1010, the server 1020, and the display device 1030.

[0134] The unwinder 111, the rewinder 113, the splicing table 115, the scrap port 117, the first rotary encoder 121, the second rotary encoder 123, the reference point sensor 135, the server 1010, the server 1020, and the display device 1030 are substantially the same as those described above with reference to Figure 1 , and thus a redundant description thereof is omitted here.

[0135] The integrated controller 140 can be configured to perform the functions of the first controller 141 and the second controller 143 described above with reference to Figure 1 . Thus, the integrated controller 140 can be implemented by software configured to receive the input amount signal UwAs, the winding amount signal WAS, the NG sensing signal NSS, the joint sensing signal JSS, and the reference point sensing signal DSS, the coordinate data, collect the NG sensing data NSD, the joint sensing data JSD, the scrap data SD, and the reference point sensing data DSD, transmit the NG sensing data NSD, the joint sensing data JSD, the scrap data SD, and the reference point sensing data DSD, and generate the control signals for controlling the unwinder 111, the rewinder 113, the scrap port 117, and the processing apparatus 119 based on the product ID, the product recipe, the defect data DD, and the NG sensing signal NSS.

[0136] The present application has been described above in greater detail with reference to the accompanying drawings, embodiments, etc. However, the configurations shown in the drawings or the embodiments described in the specification are merely embodiments of the present application and do not reflect all technical ideas of the present application, and thus it should be understood that various equivalents and modifications of alternative configurations can have been made as of the filing date of the present application.

Claims

1. A rewinding apparatus comprising: an unwinder configured to unwind an electrode sheet from a first electrode roll; a scrap port configured to scrap a defective portion of the electrode sheet; a rewinder configured to wind the electrode sheet into a second electrode roll; a first rotary encoder configured to sense a length of the electrode sheet unwound by the unwinder to generate an input amount signal; a second rotary encoder configured to sense a length of the electrode sheet wound by the rewinder to generate a winding amount signal; and a first controller configured to collect coordinate data indicative of a position on the electrode sheet based on the winding amount signal.

2. The rewinding apparatus according to claim 1, wherein the first controller is configured to collect scrap data indicative of a length of a scrapped portion of the electrode sheet based on the input amount signal.

3. The rewinding apparatus according to claim 1, further comprising: an NG sensor configured to sense an NG mark and an NG label on the electrode roll to generate an NG sensing signal.

4. The rewinding apparatus according to claim 3, wherein the first controller is configured to collect NG sensing data by associating the NG sensing signal with the coordinate data.

5. The rewinding apparatus according to claim 4, wherein the first controller is configured to control the unwinder and the rewinder based on the NG sensing data.

6. The rewinding apparatus according to claim 4, further comprising: a second controller configured to control the unwinder and the rewinder based on the NG sensing data.

7. The rewinding apparatus according to claim 1, further comprising: a joint sensor configured to sense a joint of the electrode roll to generate a joint sensing signal.

8. The rewinding apparatus according to claim 7, wherein the first controller is configured to collect joint sensing data by associating the joint sensing signal with the coordinate data.

9. The rewinding apparatus according to claim 1, further comprising: a reference point sensor configured to sense a reference point on the electrode roll to generate a reference point sensing signal.

10. The rewinding apparatus according to claim 9, wherein the first controller is configured to collect reference point sensing data by associating the reference point sensing signal with the coordinate data.

11. The rewinding apparatus according to claim 10, wherein the first controller is configured to transmit the reference point sensing data to a server, and the server is configured to generate a roll map indicative of the electrode sheet based on the reference point sensing data.

12. The rewinding apparatus according to claim 10, wherein the first controller is configured to transmit the reference point sensing data to a second controller, and the second controller is configured to control the unwinder and the rewinder.

13. The rewinding apparatus according to claim 12, wherein ​ the second controller is configured to transmit the fiducial point sensing data to a server, and the server is configured to generate a map indicating the electrode sheet based on the fiducial point sensing data. 14.A secondary battery manufacturing system comprising: a rolling apparatus configured to perform a rolling process; and a rewinding apparatus configured to process a first electrode roll processed by the rolling apparatus, wherein the rewinding apparatus includes: an unwinder configured to unwind an electrode sheet from the first electrode roll; a scrap port configured to discard a defective portion of the electrode sheet; a rewinder configured to wind the electrode sheet into a second electrode roll; a first rotary encoder configured to sense a length of the electrode sheet unwound by the unwinder to generate an input amount signal; a second rotary encoder configured to sense a length of the electrode sheet wound by the rewinder to generate a winding amount signal; and a first controller configured to collect coordinate data indicating a position on the electrode sheet based on the winding amount signal. 15.The secondary battery manufacturing system of claim 14, wherein the first controller is configured to collect scrap data indicating a length of a discarded portion of the electrode sheet based on the input amount signal. 16.The secondary battery manufacturing system of claim 14, further comprising: an NG sensor configured to sense an NG mark and an NG label on the electrode roll to generate an NG sensing signal. 17.The secondary battery manufacturing system of claim 16, wherein the first controller is configured to collect NG sensing data by associating the NG sensing signal with the coordinate data. 18.The secondary battery manufacturing system of claim 17, wherein the first controller is configured to control the unwinder and the rewinder based on the NG sensing data. 19.The secondary battery manufacturing system of claim 17, further comprising: a second controller configured to control the unwinder and the rewinder based on the NG sensing data. ​

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