Battery manufacturing method

Abstract

Disclosed is a battery manufacturing method comprising the steps of: searching for marking units of a first process; and transmitting marking-related information of the first process for an electrode sheet to a server when at least one marking unit among the marking units is a defective marking unit.

Description

Battery manufacturing method

[0001] The present invention relates to a battery manufacturing method, and more specifically, to a battery manufacturing method for increasing the accuracy of data tracking for electrodes.

[0002] The present application claims the benefit of priority based on Korean Patent Application No. 10-2024-0188765 dated December 17, 2024 and Korean Patent Application No. 10-2025-0174742 dated November 18, 2025, and all contents disclosed in the documents of said Korean patent applications are incorporated herein as part of the specification.

[0003] With the technological development and increasing demand for electric vehicles, the demand for rechargeable batteries is also rising rapidly. Lithium-ion batteries are widely used as an energy source for various electronic products as well as mobile devices, due to their high energy density, high operating voltage, and excellent storage and lifespan characteristics.

[0004] In the battery manufacturing process, which includes electrode and assembly processes, if issues such as defects occur in semi-finished or finished batteries, it may be necessary to trace back the entire process. In other words, it is necessary to identify which process each component of the battery cell being traced originated from.

[0005] Measures are required to enhance data reliability and increase productivity by improving the accuracy of identifying defects and strengthening data tracking.

[0006] The problem that the technical concept of the present invention aims to solve is to provide a battery manufacturing method for improving the accuracy of identifying defects and strengthening data tracking.

[0007] However, the technical problems that the present invention aims to solve are not limited to those described above, and other unmentioned problems will be clearly understood by a person skilled in the art from the description of the invention below.

[0008]

[0009] The present disclosure relates to a battery manufacturing method comprising: a step of searching for marking portions of a first process in one embodiment; and a step of transmitting information related to the marking of the first process for an electrode sheet to a server when at least one of the marking portions is a defective marking portion.

[0010] In some embodiments, the server includes the step of adjusting the position of a marking recognizer of the second process based on information related to marking of the first process for the electrode sheet, winding information of the rewinder of the first process, and unwinding information of the unwinder of the second process. The second process may be a process that takes place later in time than the first process.

[0011] In some embodiments, the method may further include the step of marking on one side based on the direction of travel of the electrode sheet in the first process; the step of the first controller transmitting the marking-related information to a server; and the step of the first controller transmitting the winding information of the rewinder in the first process to the server.

[0012] In some examples, the second controller can transmit unwinding information of the unwinder for the electrode sheet to the server.

[0013] In some embodiments, the marking-related information may include information on whether the marking was successful and information on the marking location. The marking location information may include the right or left side based on the direction of travel of the electrode sheet.

[0014] In some embodiments, if the marking success information includes a marking failure, the server may maintain the position of the marking recognizer.

[0015] In some embodiments, when the marking success information includes the marking success, the position of the marking recognition device of the second process can be adjusted based on the marking-related information, the winding information of the rewinder, and the unwinding information of the unwinder.

[0016] In some embodiments, when the winding direction of the rewinder and the unwinding direction of the unwinder are the same, the marking recognition device may be positioned on the opposite side of the electrode sheet. In some embodiments, positioning the marking recognition device on the opposite side of the electrode sheet may involve maintaining the position of the marking recognition device when the position of the marking recognition device is different from the one side of the electrode sheet, and moving the marking recognition device to the opposite side of the one side when the position of the marking recognition device is the same as the one side of the electrode sheet.

[0017] In some embodiments, when the winding direction of the rewinder and the unwinding direction of the unwinder are different from each other, the marking recognition device may be positioned on one side of the electrode sheet. In some embodiments, positioning the marking recognition device on one side of the electrode sheet may involve moving the marking recognition device to one side of the electrode sheet when the position of the marking recognition device is different from one side of the electrode sheet, and maintaining the position of the marking recognition device when the position of the marking recognition device is the same as one side of the electrode sheet.

[0018] In some embodiments, the method may include the step of the server generating target position information of the marking recognition device based on at least one of the marking-related information, the winding information of the rewinder, and the unwinding information of the unwounder; the step of the server transmitting the target position information to the second controller; and the step of the second controller adjusting the position of the marking recognition device based on the target position information.

[0019] In some embodiments, the marking-related information includes marking success information and marking position information, the marking position information includes the right or left side based on the direction of travel of the electrode sheet, and the target position information may have a first value or a second value based on the marking position information, the winding information of the rewinder, and the unwinding information of the unwinder.

[0020] In some embodiments, the server transmits the marking-related information and the winding information of the rewinder to the second controller, and the second controller can adjust the position of the marking recognizer based on the marking-related information, the winding information of the rewinder, and the unwinding information of the unwinder.

[0021] In some embodiments, the marking recognition device can recognize the marking on either the upper or lower surface of the electrode sheet.

[0022] In some embodiments, the marking step may involve marking on both the upper and lower surfaces of the electrode sheet.

[0023] In some embodiments, the first process is a coating process, and the second process may be any one of a roll press process, a slitting process, and a notching process.

[0024] In some embodiments, the marking step may be to mark at least one of a reference point and a defect mark.

[0025] In some embodiments, when at least one of the marking portions is a defective marking portion, the step of transmitting marking-related information of the first process for the electrode sheet to a server may be to transmit the marking-related information of the first process to a server when defective marking is successful on both the upper and lower surfaces of the electrode sheet. The marking-related information may include location information of the defective marking.

[0026] The present disclosure relates to a method for manufacturing a battery, wherein in one embodiment, the method may include the step of obtaining winding information of a rewinder of a first process for an electrode sheet and unwinding information of an unwinder of a second process for the electrode sheet; and the step of adjusting the position of a marking recognition device of the second process based on the winding information of the rewinder and the unwinding information of the unwinder. The second process may be later in time than the first process.

[0027] In some embodiments, marking can be performed on either the left or right side of the electrode sheet in the first process.

[0028] In some embodiments, when the winding direction of the rewinder and the unwinding direction of the unwinder are the same, the position of the marking recognition device may be positioned on the opposite side of the electrode sheet. In some embodiments, positioning the position of the marking recognition device on the opposite side of the electrode sheet may involve maintaining the position of the marking recognition device when the position of the marking recognition device is different from the one side of the electrode sheet, and moving the position of the marking recognition device to the opposite side of the one side when the position of the marking recognition device is the same as the one side of the electrode sheet.

[0029] In some embodiments, when the winding direction of the rewinder and the unwinding direction of the unwinder are different from each other, the position of the marking recognition device may be positioned on the one side of the electrode sheet. In some embodiments, positioning the marking recognition device on the one side of the electrode sheet may involve moving the marking recognition device to the one side of the electrode sheet when the position of the marking recognition device is different from the one side of the electrode sheet, and maintaining the position of the marking recognition device when the position of the marking recognition device is the same as the one side of the electrode sheet.

[0030] In some embodiments, the marking recognition device can recognize the marking on either the upper or lower surface of the electrode sheet.

[0031] In some embodiments, the marking step may involve marking on both the upper and lower surfaces of the electrode sheet.

[0032] In some embodiments, the first process is a coating process, and the second process may be any one of a roll press process, a slitting process, and a notching process.

[0033] In some embodiments, the marking step may be to mark at least one of a reference point and a defect mark.

[0034] The battery manufacturing method of the present disclosure can improve data reliability and enhance battery productivity by improving the accuracy of identifying defect occurrences and strengthening data tracking.

[0035] However, the technical effects obtainable through the present disclosure are not limited to those described above, and other unmentioned effects will be clearly understood by a person skilled in the art from the description of the invention below.

[0036] The following drawings attached to this disclosure illustrate preferred embodiments of this disclosure and serve to further enhance understanding of the technical concept of this disclosure together with the detailed description of the invention set forth below; therefore, this disclosure should not be interpreted as being limited only to the matters described in such drawings.

[0037] FIG. 1 is a conceptual perspective view schematically showing the state of an electrode undergoing an electrode manufacturing process.

[0038] Figure 2 conceptually shows a roll map created in the electrode manufacturing process.

[0039] FIG. 3 shows a battery manufacturing system (10) according to exemplary embodiments of the present invention.

[0040] FIG. 4 is a block diagram showing a battery manufacturing system (10) according to exemplary embodiments.

[0041] FIG. 5 is a schematic diagram showing a defective marking portion (131) according to one embodiment of the present disclosure.

[0042] FIG. 6 is a schematic diagram showing a reference point marking portion (135) according to one embodiment of the present disclosure.

[0043] FIG. 7 is a drawing for illustrating communication between a first process device (700), a second process device (800), and a server (1020) according to an exemplary embodiment of the present disclosure.

[0044] FIG. 8 is a drawing for illustrating communication between a first process device (700), a second process device (800), and a server (1020) according to an exemplary embodiment of the present disclosure.

[0045] FIG. 9 shows the winding of an electrode sheet (ES) including first to fourth lanes (L1, L2, L3, L4).

[0046] FIG. 10 shows the unwinding aspects of the first electrode roll (R1) in a subsequent roll-to-roll process.

[0047] FIG. 11 shows the unwinding aspects of the second electrode roll (R2) in a subsequent roll-to-roll process.

[0048] FIG. 12 is a table summarizing the transmission cases between the first controller, the second controller, and the server according to the embodiment of FIG. 7.

[0049] FIG. 13 shows a flowchart of a battery manufacturing method according to an exemplary embodiment of the present disclosure.

[0050] FIG. 14 shows a flowchart of a battery manufacturing method according to an exemplary embodiment of the present disclosure.

[0051] FIG. 15 shows the arrangement of electrode sheets and marking parts moving between the unwinder and the rewinder of a first process device according to an exemplary embodiment.

[0052] FIG. 16 is a flowchart of a method for transmitting marking-related information according to an exemplary embodiment.

[0053] FIG. 1 is a conceptual perspective view schematically showing the state of an electrode undergoing an electrode manufacturing process.

[0054] Referring to FIG. 1, a coated electrode (1) is manufactured by coating an active material onto a current collector in a coater to form a coated portion (1a). A reference point may be marked on an uncoated portion (1b) where the active material is not coated. In some embodiments, the active material may be coated on both the upper and lower surfaces of the electrode (1). The coated electrode (1) may be pressed by a press roll in a roll press process and may be cut along the length direction of the electrode (1) by a slitter in a slitting process.

[0055] Subsequently, electrode tabs (2) can be formed by being punched by a press or the like during a notching process. In the notching process, the electrode tabs (2) are formed for each unit electrode so that they can be cut for each unit electrode manufactured into a battery cell or cut in a subsequent process. The width of the unit electrode corresponds to the pitch (P) processed by the press.

[0056] This electrode manufacturing process is carried out through a series of roll-to-roll processes in which the electrode unwound from the unwinder moves and is wound in the rewinder, with the processes being repeated sequentially. That is, the electrode moves from the unwinder to the rewinder of the coating process to be coated, and the electrode is wound in the rewinder to complete the electrode roll of the coating process. Next, the electrode roll can be mounted on the unwinder of the roll press process and moved to the rewinder of the roll press process. The electrode roll is wound in the rewinder of the roll press process to complete the electrode roll of the roll press process. Subsequently, the electrode roll can be unwound from the unwinder of a subsequent process (e.g., a second roll press process, a slitting process, or a notching process), undergo a predetermined process, and then wound again in the rewinder of the subsequent process to complete the electrode roll of the subsequent process. In this way, the electrode manufacturing process may include a series of roll-to-roll processes in which the electrode unwound from the unwinder moves and is wound in the rewinder (so-called roll-to-roll processes) is sequentially repeated.

[0057] Figure 2 conceptually shows a roll map created in the electrode manufacturing process.

[0058] As described above, electrodes may proceed in a roll-to-roll manner during processes such as coating, roll pressing, and slitting. A roll map simulates the progression of such electrodes and represents them in the form of bars. On the roll map, the longitudinal and transverse positions of the electrodes can be plotted as coordinates. That is, the roll map may include a coordinate plane having two coordinate axes: a longitudinal axis and a transverse axis. Each position of the electrode on the coordinate plane can be represented by a coordinate value on the said coordinate plane. Information regarding defects, quality issues, electrode breakage, etc., occurring during the electrode manufacturing process can be stored in the roll map along with the said coordinates. Therefore, by using the roll map, data related to quality or defects in the electrode manufacturing process can be easily identified visually at a glance.

[0059] Referring to FIG. 2, information regarding external defects such as pinhole defects (f1) and line defects (f2) can be visualized and displayed at the coordinates where the defects occurred. Additionally, a mismatch area (f3) between the coated and uncoated parts is also displayed. Other defects such as loading amount defects are also displayed, and the part where the electrode was discarded at the outermost edge is also shown.

[0060] Additionally, reference points (K1, K2, K3) may be marked and displayed at predetermined intervals on the electrode (1). When a break occurs in the electrode (1) and it is connected to a joint connecting member, the electrode length is reduced by the length of the break. As previously explained, points where external defects occur can also be removed so that the operator can connect them. The roll map can simulate such situations, and accordingly, the coordinates on the roll map can be modified. Referring to FIG. 2, coordinates that do not reflect the electrode removal part and coordinates that reflect it are shown together on a single roll map. The former is referred to as the absolute coordinate (x), and the latter as the relative coordinate (y). As shown in FIG. 2, the relative coordinate (y) and the absolute coordinate (x) can be displayed together on a single roll map, but they can also be displayed separately. A roll map displayed with relative coordinates (y) can represent the state of the actual electrode.

[0061] A roll map can be created for each individual process described above. In some embodiments, since the electrode wound in the preceding process is unwound in the succeeding process, the end of the roll map representing the electrode roll of the preceding process may become the beginning of the roll map representing the electrode roll of the succeeding process. That is, the beginning and end of the electrode may be reversed as the process goes through the roll-to-roll process. Additionally, in some embodiments, in the case of a double-sided electrode where an electrode active material is coated on both sides of the electrode, the electrode surface may be reversed, such as the upper electrode of the preceding process becoming the lower electrode in the succeeding process. That is, depending on the winding direction of the electrode in the preceding process and the unwinding direction of the electrode in the succeeding process, the beginning and end of the electrode and the surface inversion may occur. Since the roll maps for each process can be created based on the electrodes reversed in this way, the coordinates of the roll maps for each process may also be reversed relative to one another. Furthermore, as the process goes through a series of roll-to-roll processes, the electrode length may be changed, such as by cutting and connecting the electrode multiple times in the longitudinal direction to remove defective sections or broken sections. Since the roll map of each process reflects these inversions and length changes, the coordinate values ​​may differ for each.

[0062] When electrode portions are removed, only the remaining electrode (survival electrode), excluding the electrode portions removed in the previous process, may remain in the final stage of the electrode manufacturing process. Since the battery is manufactured using these survival electrodes, if a problem occurs in a finished or semi-finished battery, the cause of the problem can be traced by referring to the roll map of the final electrode. Furthermore, the electrode portion that originated the problem can be traced backward by referring to the roll maps of each process described above. As such, the roll map is a useful tool for quality tracking as well as for identifying quality and defects.

[0063] FIG. 3 shows a battery manufacturing system (10) according to exemplary embodiments of the present invention.

[0064] Referring to FIG. 3, the battery manufacturing system (10) may include a coating device (200), a roll pressing device (300), a slitting device (400), a notching device (500), and rewinding stages (600).

[0065] 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 rolls of the roll pressing device (300), and the slitting knife of the slitting device (400), and the processed electrode sheet can be wound by the electrode roll. Accordingly, the processing of the coating device (200), the roll pressing device (300), and the slitting device (400) for the production of the electrode of the battery can be referred to as a roll-to-roll process.

[0066] The coating device (200) can perform a coating process on an electrode sheet. The coating process is a process of applying a coating material, such as an electrode slurry, onto an electrode sheet. The electrode slurry may include an electrode active material, a conductive agent, a binder, and a solvent. An electrode slurry can be provided by dissolving the electrode active material, the conductive agent, and the binder, etc., in a solvent.

[0067] The roll pressing device (300) can perform a roll pressing process on an electrode sheet. The roll pressing process is a process of passing an electrode sheet coated with an electrode slurry between pressure rolls facing each other. The roll pressing process can flatten the surface of the electrode sheet and improve the bonding strength between the active material of the electrode sheet and the current collector.

[0068] The slitting device (400) can perform a slitting process on the electrode sheet. By the slitting process, the electrode sheet can be separated into a plurality of electrode sheets.

[0069] The notching device (500) can cut the electrode sheet unwound from the electrode roll into the shape of an electrode of a battery cell. Accordingly, unit electrodes can be formed in the notching device (500). The notching device (500) can further perform a drying process for either the electrode sheet or the unit electrodes.

[0070] If the electrode sheet contains defects, the defects in the electrode sheet can be removed. The defects in the electrode sheet can be removed in either the roll pressing device (300) and the rewinding stages (600).

[0071] At each of the rewinding stages (600), no actual process may be performed on the electrode sheet. Each of the rewinding stages (600) may change the winding direction of the electrode sheet. Each of the rewinding stages (600) may unwind the electrode roll, remove defects from the electrode sheet unwound from the electrode roll, and rewind the electrode sheet with the defects removed. Accordingly, in addition to removing defects from the electrode roll, the outer part of the input electrode roll may be wound inward on the completed electrode roll. Likewise, the inner part of the input electrode roll may be wound outward on the completed electrode roll.

[0072] Defects in the electrode sheet can be removed while the roll pressing device (300) performs the roll pressing process. Optionally, defects in the electrode sheet may be removed without performing the roll pressing process. The operation mode of the roll pressing device (300) that removes only the defective parts of the electrode sheet without performing the roll pressing process is referred to as the rewinding mode. In the rewinding mode, each of the pressure rolls can be moved from the position where the electrode sheet was located to a separate different position.

[0073] Unit electrodes can be provided as the electrode roll is processed sequentially by a coating device (200), a roll pressing device (300), a slitting device (400), and a notching device (500). In the case of wide unit electrodes, after the roll pressing process is performed in the roll pressing device (300), they may be transferred directly to the notching device (500) without slitting in the slitting device (400).

[0074] If the defects of the electrode roll processed by the coating device (200) and fed into the roll pressing device (300) are excessive, the defects of the electrode roll can be removed in the roll pressing device (300). The excessive defects of the electrode roll processed by the coating device (200) may include, for example, a large amount of tab folding, ring defects, etc.

[0075] If the defects of the electrode roll processed by the roll pressing device (300) are excessive, the defects of the electrode roll can be removed in either the roll pressing device (300) operating in a rewinding mode or the rewinding stage (600). Subsequently, the electrode roll having reduced defects (or no defects) can be fed into the slitting device (400). The excessive defects of the electrode roll processed by the roll pressing device (300) may include winding failure and exceeding the upper limit of the number of defect tags.

[0076] If the defects of the electrode roll processed by the slitting device (400) are excessive, the defects of the electrode roll can be removed in the rewinding stage (600). Subsequently, the electrode roll having reduced defects (or no defects) can be fed into the notching device (500). The excessive defects of the electrode roll processed by the slitting device (400) may include exceeding the upper limit of the number of defect tags.

[0077] Here, each of the rewinding stages (600) can be made online. Each of the rewinding stages (600) can be configured to discard defects from the electrode roll and collect scrap data indicating the discarded length. Accordingly, the length of the discarded electrode at the rewinding stages (600) can be updated, and the traceability of the battery manufacturing process can be improved.

[0078] FIG. 4 is a block diagram showing a battery manufacturing system (10) according to exemplary embodiments.

[0079] Referring to FIG. 4, the battery manufacturing system (10) may include an electrode process device (100), an EIF (1010), a server (1020), and a visualization device (1030). The electrode process device (100) may be one or more of a coating device (200), a roll pressing device (300), a slitting device (400), a notching device (500), and rewinding stages (600).

[0080] The electrode process device (100) may include an unwinder (111), a rewinder (113), a first rotary encoder (121), a second rotary encoder (123), a defect marking unit (131), a reference point marking unit (135), a roll map PLC (Programmable Logic Controller) (141), and a process PLC (143). In some embodiments, the electrode process device (100) may further include a splicing table (115) and / or a scrap port (117).

[0081] A battery manufacturing system (10) may be configured to generate a roll map containing data for an electrode sheet (ES). The roll map may represent the electrode sheet (ES) based on coordinate values ​​representing a location on the electrode sheet (ES). On the electrode sheet (ES), a process for manufacturing a battery may be performed, as described below. The roll map may include data associated with coordinate values ​​representing events of the process performed on the electrode sheet (ES). Accordingly, the roll map enables feedback, feed forwarding, and tracking of the battery manufacturing process, as described below.

[0082] The first electrode roll (ER1) on which the previous process has been performed can be loaded into an unwinder (111). The unwinder (111) can be configured to unwind an electrode sheet (ES) from the first electrode roll (ER1). The rewinder (113) can be configured to wind the electrode sheet (ES) as a second electrode roll (ER2). The electrode sheet (ES) is wound as a second electrode roll (ER2) and can be cut and separated after reaching a predetermined winding length. Accordingly, the electrode sheet (ES) can move between the unwinder (111) and the rewinder (113).

[0083] A roll map can be generated in lot units. A lot is a production unit of a roll-to-roll process, and the separated second electrode roll (ER2) is an example of a lot. Likewise, the first electrode roll (ER1) newly loaded into the unwinder (111) is also an example of a 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). Additionally, the server (1020) can be configured to generate a second roll map of the second electrode roll (ER2) based on the processing of the electrode process device (100). The second roll map can correspond to the second electrode roll (ER2).

[0084] As a non-limiting example, the second roll map may be generated by updating the first roll map. Alternatively, the second roll map may be generated based on data generated in the electrode process device (100) without loading the first roll map.

[0085] Time series data configured over time (i.e., according to the progress of the process) in a roll map 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 added).

[0086] Battery manufacturing involves a series of distinct processes, and the leading process influences the following process. In this context, if the time-series data of the leading process does not directly match the actual workpiece, intermediate product, or final product, it may be difficult to reflect that data in the following process. Hereinafter, the correction of the following process based on data generated from the results of the leading process is referred to as "feed forward."

[0087] Here, the workpiece refers to an article provided as a result of each process, such as an electrode sheet (ES) on which the coating process, roll pressing process, and slitting process shown in FIG. 3 have been performed. The semi-finished product may refer to one of separators, electrodes, and assemblies thereof cut through a notching process. The semi-finished product may also be a structure comprising a housing and an electrode assembly embedded in the housing (in some cases, the structure further comprises an electrolyte). The product refers to an article processed to be operable as a battery through an activation process. The definitions of the workpiece, semi-finished product, and product described above are for one aspect thereof and do not exclude the conventional definitions thereof.

[0088] The electrode process of a battery includes a series of roll-to-roll processes. For feed-forwarding, time-series data needs to be associated with the positions of real-world workpieces, parts, semi-finished products, and finished products. Here, feed-forwarding may include controlling the processing of an electrode sheet (ES) based on a roll map of a first electrode roll (ER1) generated in a previous process. In some embodiments, the roll map of the first electrode roll (ER1) processed in the current process may include defective data (DD), and in the electrode process apparatus (100), an electrode sheet (ES) unwound from the first electrode roll (ER1) may be discarded based on the defective data (DD).

[0089] A roll map can correlate time-series data with coordinate data that includes coordinate values ​​representing the positions of actual workpieces, parts, semi-finished products, and finished products. Based on the coordinate data, the roll map can provide a matching between the time-series data and the real-world workpieces, parts, semi-finished products, and finished products. Accordingly, the creation of the roll map and feed forwarding based on the roll map can improve productivity and quality by quantifying and objectifying phases of the process that previously relied on the arbitrary discretion of the operator.

[0090] In addition, the roll map of a preceding lot may be used to improve the process for a subsequent lot, and this operation may be referred to as process feedback. Process feedback using a roll map may include identifying process conditions and process parameters that caused problems and defects based on the data included in the roll map.

[0091] Furthermore, as described below, the roll map is generated cumulatively for the workpieces, parts, semi-finished products, and finished products of unit processes, thereby enabling the tracking of the process history for shipped products (e.g., battery cells, battery modules, or battery packs). For example, a battery cell may include a cell ID formed on an electrode assembly or 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 the roll map of the electrodes and separator included in the battery cell. Accordingly, if an event such as a quality issue occurs in a battery cell that has already been shipped, the historical data of the manufacturing of the battery cell can be retrieved based on the cell ID.

[0092] 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). Accordingly, the first rotary encoder (121) may generate an unwinding 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 unwinding amount signal (UWAS) to the roll map PLC (141).

[0093] The first rotary encoder (121) may be provided on the unwinder (111). In some embodiments, the first rotary encoder (121) may be a non-contact encoder configured to measure the linear velocity of the electrode sheet (ES) using a laser beam.

[0094] The second rotary encoder (123) may be configured to sense the amount of electrode sheet (ES) wound onto the second electrode roll (ER2) by the rewinder (113). Accordingly, the second rotary encoder (123) may generate a winding 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 winding amount signal (WAS) to the roll map PLC (141).

[0095] The second rotary encoder (123) may be provided on the unwinder (111). In some embodiments, the second rotary encoder (123) may be a contact type encoder. In some embodiments, the second rotary encoder (123) may be an encoder configured to measure the length of the electrode sheet (ES) transported by contacting a rotary wheel to the electrode sheet (ES). The second rotary encoder (123) may be provided on the rewinder (113).

[0096] Defective parts of the electrode sheet (ES) can be discarded as described below. Accordingly, the length of the electrode sheet (ES) unwound from the unwinder (111) may differ from the length of the electrode sheet (ES) wound by the rewinder (113).

[0097] The roll map PLC (141) may be configured to collect coordinate data of the electrode sheet (ES) based on the unwinding amount signal (UWAS) and / or winding amount signal (WAS) of the electrode sheet (ES). For example, the roll map PLC (141) may determine the travel distance of the electrode sheet (ES) based on the unwinding amount signal (UWAS) of the electrode sheet (ES), and accordingly, the roll map PLC (141) may be configured to determine the position within the electrode sheet (ES) of the portion of the electrode sheet (ES) that is unwound by the unwinder (111) at each point in time when an event occurs on the electrode sheet (ES). As another example, the roll map PLC (141) can determine the travel distance of the electrode sheet (ES) based on the winding amount signal (WAS) of the electrode sheet (ES), and accordingly, the roll map PLC (141) can be configured to determine the position within the electrode sheet (ES) of the portion of the electrode sheet (ES) that is wound by the rewinder (113) at each point in time when an event occurs on the electrode sheet (ES). As another example, the roll map PLC (141) may determine the travel distance of the electrode sheet (ES) based on the unwinding amount signal (UWAS) and the winding amount signal (WAS), respectively.

[0098] Here, the event may include various processing, inspection, and measurement occurring on the electrode sheet (ES) in the electrode process device (100), such as cutting the electrode sheet (ES), joining the electrode sheet (ES), sensing a reference point (Datum Point) on the electrode sheet (ES), and sensing a defective tag on the electrode sheet (ES).

[0099] The coordinate data may include coordinate values ​​that correspond to each part of the electrode sheet (ES). That is, each of any point on the electrode sheet (ES) may be matched to a coordinate value. The coordinate value may be a one-dimensional quantity in the length direction of the electrode sheet (ES), but is not limited thereto. The coordinate value may also be a two-dimensional quantity in the length direction and the Y direction in the width direction of the electrode sheet (ES).

[0100] The defect marking unit (131) may be configured to detect a defect on the electrode sheet (ES) and provide a defect mark indicating the defect. The defect marking unit (131) may be configured to transmit a defect detection signal (NSS) to the roll map PLC (141).

[0101] Referring to FIG. 4, the roll map PLC (141) may be configured to collect defect detection data (NSD) based on a defect detection signal (NSS). The roll map PLC (141) may be configured to associate the defect detection signal (NSS) with coordinate data to collect defect detection data (NSD). The defect detection data (NSD) may include, for example, a defect value indicating the presence or absence of a defect and the pattern of the defect, and a coordinate value matched to the defect value.

[0102] To collect defect detection data (NSD), coordinate data can be calibrated based on an offset length (OL1). The calibration of coordinate data compensates for the difference between the portion of the electrode sheet (ES) sensed by the first rotary encoder (121), that is, the portion of the electrode sheet (ES) wound by the rewinder (113), and the portion of the electrode sheet (ES) sensed by the defect marking portion (131).

[0103] According to exemplary embodiments, the roll map PLC (141) can correct coordinate data collected at the same time as the defect detection signal (NSS) based on the offset length (OL1) to collect defect detection data (NSD), and can associate the corrected coordinate data with the defect detection signal (NSS).

[0104] The offset length (OL1) is the length of the electrode sheet (ES) between the defective marking portion (131) and the rewinder (113) along the movement path of the electrode sheet (ES). The offset length (OL1) may be equal to the straight-line distance between the defective marking portion (131) and the rewinder (113).

[0105] The process PLC (143) may be configured to control the operation of the unwinder (111), rewinder (113), scrap port (117), and processing mechanism (119). The process PLC (143) may be configured to generate signals for the operation and interruption of the unwinder (111), rewinder (113), scrap port (117), and processing mechanism (119).

[0106] The process PLC (143) may be configured to receive defect detection data (NSD) from the roll map PLC (141). The process PLC (143) may be configured to receive defect data (DD) from the server (1020). The defect data (DD) may be loaded into the process PLC (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 the first roll map of the first electrode roll (ER1).

[0107] The process PLC (143) may be configured to generate signals for the operation and interruption of the unwinder (111), rewinder (113), scrap port (117), and processing mechanism (119) based on defect detection data (NSD) and defect data (DD). When a defect on the electrode sheet (ES) identified by the defect data (DD) and defect detection data (NSD) approaches the splicing table (115), the process PLC (143) may be configured to generate signals to slow down the movement speed of the electrode sheet (ES) or to stop the winding and unwinding of the unwinder (111) and rewinder (113).

[0108] After cutting the starting position of the defect (or, considering the process margin, a position adjacent to the starting position of the defect) on the splicing table (115), the scrap port (117) may be configured to wind 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) is sufficiently wound 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) may be separated. Subsequently, the current process may be continued by joining 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).

[0109] In some embodiments, after stopping the unwinder (111) and rewinder (113) for disposal of the defective portion (DES) of the electrode sheet (ES), the defective portion (DES) of the electrode sheet (ES) may be moved to the scrap port by driving the unwinder (111) without driving the rewinder (113). In some embodiments, the roll map PLC (141) may be configured to collect scrap data (SD) based on the unwinding amount signal (UWAS) after the disposal of the defective portion (DES) of the electrode sheet (ES) has started. In some embodiments, for the collection of scrap data (SD), the roll map PLC (141) may receive a signal from the process PLC (143) to control the operation of the unwinder (111) and rewinder (113). As another example, the roll map PLC (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 roll map PLC (141) may be configured to collect scrap data (SD) based on the change in distance between reference points on the electrode sheet (ES) and the distance between the seam on the electrode sheet (ES) and the reference point.

[0110] The roll map PLC (141) can be configured to collect scrap data (SD) indicating the length of electrode sheets (ES) discarded due to defects from the electrode rolls for the electrode process device (100). Accordingly, the length of the discarded electrodes in the rewinding stages (600) can be updated, and the traceability of the battery manufacturing process can be improved.

[0111] In some embodiments, the roll map PLC (141) may be configured to calculate the length of the discarded electrode sheet from the unwinding amount signal (UWAS) and the winding amount signal (WAS). In some embodiments, the roll map PLC (141) may be configured to check whether the difference between the unwinding amount and the winding amount calculated from the unwinding amount signal (UWAS) and the winding amount signal (WAS) corresponds to the scrap data (SD). In some embodiments, the roll map PLC (141) may be configured to determine the scrap data (SD) as the discarded amount of the electrode sheet if the difference between the unwinding amount and the winding amount corresponds to the scrap data (SD).

[0112] A seam sensor (133) may be configured to sense a seam on an electrode sheet (ES) to generate a seam detection signal (JSS). The seam may be a portion formed by joining the two ends of the electrode sheet (ES) after removing a defective portion (DES) of the electrode sheet (ES). As a non-limiting example, the seam sensor (133) may be either a color sensor or a vision machine. The seam sensor (133) may be configured to transmit the seam detection signal (JSS) to a roll map PLC (141).

[0113] The roll map PLC (141) can be configured to collect seam detection data (JSD) based on the seam detection signal (JSS). The roll map PLC (141) can be configured to collect seam detection data (JSD) by associating the seam detection signal (JSS) with coordinate data.

[0114] According to exemplary embodiments, the roll map PLC (141) can correct coordinate data collected at the same time as the seam detection signal (JSS) based on the offset length (OL2) to collect seam detection data (JSD) and associate the corrected coordinates with the seam detection signal (JSS).

[0115] The offset length (OL2) is the length of the electrode sheet (ES) between the seam sensor (133) and the rewinder (113) along the movement path of the electrode sheet (ES). The offset length (OL2) may be equal to the straight-line distance between the seam sensor (133) and the rewinder (113).

[0116] The reference point marking unit (135) may be configured to sense reference points of the electrode sheet (ES) to generate a reference point detection signal (DSS). Reference points may be formed at set intervals on the electrode sheet (ES) to indicate a position on the electrode sheet (ES). Each reference point may be a two-dimensional barcode containing information, for example, the direction of the reference point and the sequence number of the reference point. Accordingly, the reference point detection signal (DSS) may include a time value corresponding to the sensing of the reference point and a sequence number value of the reference point. The reference point marking unit (135) may be configured to transmit the reference point detection signal (DSS) to the roll map PLC (141).

[0117] The roll map PLC (141) can be configured to collect reference point detection data (DSD) based on a reference point detection signal (DSS). The roll map PLC (141) can be configured to collect reference point detection data (DSD) by associating the reference point detection signal (DSS) with coordinate data.

[0118] According to exemplary embodiments, the roll map PLC (141) can correct coordinate data collected at the same time as the reference point detection signal (DSS) based on the offset length (OL3) to collect reference point detection data (DSD), and can associate the corrected coordinate data with the reference point detection signal (DSS).

[0119] The offset length (OL3) is the length of the electrode sheet (ES) between the reference point marking section (135) and the rewinder (113) along the movement path of the electrode sheet (ES). The offset length (OL3) may be equal to the straight-line distance between the reference point marking section (135) and the rewinder (113).

[0120] According to exemplary embodiments, any data generated based on events of scrap data (SD), defect detection data (NSD), and electrode sheet (ES) can be corrected based on reference point detection data (DSD).

[0121] The electrode process device (100) may further include additional inspection measuring instruments. Here, the term "inspection measuring instrument" encompasses devices capable of performing only inspection, devices capable of performing only measurement, and devices capable of performing both inspection and measurement; if it falls under any one of these three, it will be referred to as an inspection measuring instrument. The inspection measuring instrument may include a sensing unit and a processing unit.

[0122] The above inspection measuring instrument may be configured to collect or generate inspection measuring data. Here, inspection measuring data is a term encompassing both inspection data and measuring data, and if it corresponds to only one of the two, it will be referred to as inspection measuring data. The processing unit of the above inspection measuring instrument may be connected to the sensing unit via a wired or wireless connection.

[0123] The above measurement data may include a plurality of measurement values ​​expressed numerically. For example, the above measurement data may include dimensional data of the electrode sheet (ES), such as thickness and width; loading amount data of the coating material 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 mismatch data between the retaining lanes on the upper surface of the electrode sheet (ES) and the retaining lanes 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 area density of the coating material.

[0124] The above inspection data may include judgments on the quality of parts of the electrode sheet (ES) and process events. For example, the above 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 open circuits and seams of the electrode sheet (ES), data on parts of the electrode sheet (ES) where sampling inspection has been performed, data on parts of the electrode sheet (ES) scheduled for disposal, data on parts of the electrode sheet (ES) that have been disposed of, data on the quality of coating materials and insulating materials on the electrode sheet (ES), data on reference points indicating the location of the electrode sheet (ES), and defect data such as pinhole defects, crater defects, line defects, crack defects, side ring defects, island defects, folding defects, wrinkle defects, gouge defects, and dent defects. The inspection device may be any one of a color sensor, a seam sensor, a reference point sensor, and a vision machine.

[0125] The inspection and measurement data described above may be time-series data. The inspection and measurement data may be ordered temporally. Temporal ordering is a key characteristic of time-series data, which involves organizing events in the order in which they occur and arrive for processing. That is, the inspection and measurement data may be stored based on the time at which the inspection and / or measurement was performed, and the inspection and measurement data may be associated with time. Accordingly, each of the measurement values ​​and each of the inspection values ​​of the inspection and measurement data may be matched to time.

[0126] The roll map PLC (141) may be in operative communication via a wired or wireless data network with the first rotary encoder (121), the second rotary encoder (123), the defect marking unit (131), the seam sensor (133), the reference point marking unit (135), and additional measuring instruments and inspectors. The data network may be unidirectional or bidirectional. The data network may be implemented by a physical channel, a public network and / or a specialized network using WiFi, Bluetooth and / or other frequency bands. The first rotary encoder (121), the second rotary encoder (123), the defect marking unit (131), the seam sensor (133), the reference point marking unit (135), and additional measuring instruments and inspectors may be configured to collect data from equipment, workpieces, semi-finished products and products within the electrode process device (100), or to generate signals for collecting data.

[0127] The roll map PLC (141) may be configured to transmit defect detection data (NSD), seam detection data (JSD), scrap data (SD), and reference point detection data (DSD) to the process PLC (143). The defect detection data (NSD), seam detection data (JSD), scrap data (SD), and reference point detection data (DSD) may be transmitted to the server (1020) via the process PLC (143) and the EIF (1010). The process PLC (143) and the EIF (1010) may relay the communication of data including defect detection data (NSD), seam detection data (JSD), scrap data (SD), and reference point detection data (DSD) between the server (1020) and the roll map PLC (141). However, it is not limited to this, and the roll map PLC (141) may also directly transmit defect detection data (NSD), seam detection data (JSD), scrap data (SD) and reference point detection data (DSD) to the server (1020).

[0128] For process control, a communication line connecting the process PLC (143) and the server (1020) via the EIF (1010) can be installed. Accordingly, data transmission through the process PLC (143) can reduce the resources required for the installation of the communication line and can streamline data processing and management compared to the case where the first and second rotary encoders (121, 123) and the reference point marking unit (135) directly transmit the unwinding amount signal (UWAS), winding amount signal (WAS), and measurement signal to the server (1020), and the case where the roll map PLC (141) directly transmits the defect detection data (NSD), seam detection data (JSD), scrap data (SD), and reference point detection data (DSD) to the server (1020).

[0129] The EIF (1010) may be a device for communication between the process PLC (143) of the manufacturing facility and the upper server (1020).

[0130] The server (1020) may include a manufacturing execution system (MES).

[0131] Referring to FIG. 4, the PLC (140) may include a roll map PLC (141) and a process PLC (143). In some embodiments, the roll map PLC (141) and the process PLC (143) may be formed as a single unit to constitute an integrated PLC (140).

[0132] FIG. 5 is a schematic diagram showing a defective marking portion (131) according to one embodiment of the present disclosure.

[0133] Referring to FIGS. 4 and 5, the defect marking unit (131) may include an integrated vision device (1311), a defect marker (1315), and a marking recognizer (1317).

[0134] In some embodiments, the integrated vision device (1311) may determine whether a defect exists on the electrode sheet (ES) and transmit a signal to the PLC (140) regarding whether to mark the defect. The integrated vision device (1311) may be configured to acquire an image of the electrode sheet (ES) and to determine whether a defect exists on the surface by processing the acquired image. In some embodiments, if a defect exists, the integrated vision device (1311) may be configured to determine whether the defect is a point defect such as a pinhole or a line defect extending in a specific direction, and to assign attributes regarding the type of defect to the defect.

[0135] In some embodiments, when the integrated vision device (1311) transmits a signal (hereinafter referred to as the 'defect detection signal' (NSS)) that a defect exists on the electrode sheet (ES) to the PLC (140), the PLC (140) may transmit a signal to the defect marker (1315) to apply a defect marking to the corresponding location. The defect marker (1315) may apply a defect marking according to the command of the PLC (140).

[0136] In some embodiments, the defect marking is to form any layer indicating that a defect is located at a corresponding location on the electrode sheet (ES). Specifically, the defect marking may be printed with ink or attached with an adhesive tag. However, the defect marking may be provided by any means that allows the location of the defect to be visually recognized, and the present disclosure is not limited to the above examples.

[0137] In some embodiments, the defect marking may be formed on the unmarked portion of the electrode sheet (ES) to indicate that a defect is located at a corresponding position on the electrode sheet (ES). The unmarked portion may be a portion on the current collector where no active material is applied. In some embodiments, the integrated vision device (1311) may be configured to directly transmit a defect detection signal (NSS) to a defect marker (1315). At this time, the integrated vision device (1311) may be configured to simultaneously transmit the defect detection signal (NSS) to the PLC (140). The PLC (140) may be configured to store the location where the defect exists along with the coordinate information of the electrode sheet (ES).

[0138] In some embodiments, the integrated vision device (1311) may be configured to directly transmit a defect detection signal (NSS) to a marking recognizer (1317). At this time, the integrated vision device (1311) may be configured to simultaneously transmit the defect detection signal (NSS) to a PLC (140).

[0139] In some embodiments, the marking recognizer (1317) may be configured to determine whether a defect marking is properly made on the electrode sheet (ES). In some embodiments, the marking recognizer (1317) may be a smart vision device. The smart vision device may be configured to acquire an image of the electrode sheet (ES) and, by processing the acquired image, determine whether a defect marking exists on the surface. In some embodiments, the smart vision device may be configured to acquire an image of the unmarked portion of the electrode sheet (ES) and, by processing the acquired image, determine whether a defect marking exists on the surface. The smart vision device may determine whether a defect detection signal (NSS) was present at a location corresponding to the image. The defect detection signal (NSS) may be transmitted directly from the integrated vision device (1311) or from the PLC (140). That is, the marking recognition device (1317) can be configured to determine whether there is no defect marking even though there is a defect on the electrode sheet (ES) (i.e., there was a transmitted defect detection signal (NSS)), or whether there is a defect marking even though there is no defect (i.e., there was no transmitted defect detection signal (NSS)).

[0140] In some embodiments, the marking recognizer (1317) can locate the position of a defective marking. The marking recognizer (1317) can acquire a marking image by taking a photograph of the detected defective marking. In some embodiments, the marking image can be acquired by taking a photograph of the unmarked portion of the electrode sheet (ES). The marking recognizer (1317) can transmit the defective marking image to the PLC (140). The PLC (140) can determine whether the marking is successful based on the defective marking image. The PLC (140) can transmit marking-related information (MI) containing information on the success or failure of the corresponding defective marking to the server (1020). In some embodiments, the marking-related information (MI) may further include location information of the successful defective marking. The location information of the defective marking may include whether the position of the marking is to the left or to the right relative to the direction of travel of the electrode sheet (ES).

[0141] In other embodiments, the marking recognizer (1317) may determine whether the defective marking is successful based on the defective marking image and transmit marking-related information (MI) containing information on whether the defective marking is successful to the PLC (140). In some embodiments, the marking-related information (MI) may further include location information of the successful defective marking.

[0142] In some embodiments, the defect marking unit (131) can perform the function of the reference point marking unit (135). For example, the defect marker (1315) of the defect marking unit (131) can mark the reference point, and the marking recognition unit (1317) can recognize the reference point. Accordingly, the defect marking unit (131) can provide the reference point and the defect mark even if a separate reference point marking unit (135) is not provided in the blank area (e.g., the outer blank area) where defect marking and reference point marking are required. Accordingly, the device configuration can be simplified, and the installation space and cost of the equipment can be reduced. In FIG. 5, the defect marking unit (131) is illustrated as simultaneously marking one side and the other side of the electrode sheet and simultaneously sensing one side and the other side of the electrode sheet. However, to explain the arrangement relationship between the defective marking part (131) and the electrode sheet, the marking and sensing of one side and the other side of the electrode sheet may proceed sequentially according to the factory equipment layout.

[0143] FIG. 6 is a schematic diagram showing a reference point marking portion (135) according to one embodiment of the present disclosure.

[0144] The reference point marker (1351) can perform reference point marking according to the command of the PLC (140). The reference point serves as reference information for quality control and tracking in the electrode process, assembly process, and subsequent winding process. For this reason, it is necessary to maintain the shape of the reference point at each electrode lane planned area without damage even after undergoing a subsequent slitting process.

[0145] The reference point marker (1351) may be any one of an inkjet type ink marking machine, a laser type laser marking machine, or a punching type marking machine. However, it is not limited to the embodiments described above. An appropriate marking machine may be selected and used within a range where the visibility of the reference point is excellent and the non-coated part is not damaged. In the case of laser or punching type marking machines, damage may be left on the non-coated part, so caution is required when marking the reference point.

[0146] In some embodiments, the marking recognizer (1353) can locate the position of a reference point marking. The marking recognizer (1353) can acquire a marking image by taking a photograph of the located reference point marking. The marking recognizer (1353) can transmit the reference point marking image to the PLC (140). The PLC (140) can determine whether the reference point marking is successful based on the reference point marking image. The PLC (140) can transmit marking-related information (MI) containing information on whether the reference point marking is successful to the server (1020). In some embodiments, the marking-related information (MI) may further include location information of a successful defective marking. The location information of the marking may include whether the position of the marking is to the left or right relative to the direction of travel of the electrode sheet (ES).

[0147] In other embodiments, the marking recognition device (1317) may determine whether the reference point marking is successful based on the reference point marking image and transmit marking-related information (MI) including information on whether the reference point marking is successful to the PLC (140).

[0148] In some embodiments, the reference point marking part (135) cannot perform the function of the defective marking part (131), but the defective marking part (131) can perform the function of the reference point marking part (135).

[0149] In FIG. 6, the reference point marking unit (135) is shown as simultaneously marking one side and the other side of the electrode sheet and simultaneously sensing one side and the other side of the electrode sheet. However, this is to explain the arrangement relationship between the reference point marking unit (131) and the electrode sheet, and depending on the factory equipment layout, the marking and sensing of one side and the other side of the electrode sheet may proceed sequentially.

[0150]

[0151] FIG. 7 is a drawing for illustrating communication between a first process device (700), a second process device (800), and a server (1020) according to an exemplary embodiment of the present disclosure. FIG. 7 may be described with reference to FIG. 5 and FIG. 6.

[0152] FIG. 7 may be described with reference to FIG. 1 through 4. Referring to FIG. 7, a battery manufacturing system (10) may include a server (1020), a first process device (700), and a second process device (800). In the present disclosure, the second process may be a process that occurs later in time than the first process. For example, the first process may be a coating process, and the second process may be any one of roll pressing fixing, a slitting process, and a notching process. In another embodiment, the first process may be roll pressing fixing, and the second process may be any one of a slitting process and a notching process. In another embodiment, the first process may be a slitting process, and the second process may be a notching process.

[0153] The first process device (700) may include a first controller (140_1) and a marking recognizer (701). The second process device (800) may include a second controller (140_2) and a marking recognizer (801). The first process device (700) and the second process device (800) may each include additional components required for the corresponding process. The first controller (140_1) and the second controller (140_2) may each correspond to the PLC (140) of FIG. 4. The marking recognizer (701) may include a marking recognizer (1317, FIG. 6) and a marking recognizer (1353, FIG. 7).

[0154] The marking recognition device (801) may include at least one of an OCR (Optical Character Recognition) device and a BCR (Business Card Recognition) device.

[0155] The first process device (700) may further include at least one of a defect marker (1315) and a reference point marker (1351). A marking recognizer (701) may be provided at a location adjacent to at least one of the defect marker (1315) and the reference point marker (1351). The marking recognizer (701) may acquire a marking image by photographing the electrode sheet. The marking recognizer (701) may transmit the marking image to the first controller (140_1). The first controller (140_1) may determine whether the marking is successful or unsuccessful by reading the marking image. Additionally, the first controller (140_1) may determine whether the position of the marking is to the left or right relative to the direction of travel of the electrode sheet by reading the marking image. Accordingly, the marking-related information (MI) transmitted by the first controller (140_1) to the server (1020) may include location information of the marking and information on whether the marking was successful.

[0156] The first controller (140_1) can transmit marking-related information (MI) including information on whether the marking was successful to the server (1020). Additionally, the first controller (140_1) can transmit winding information (RWD) of the rewinder of the first process device (700) to the server (1020). The rewinder winding information (RWD) may include a rewinder winding direction related to whether the electrode sheet of the first process device (700) is wound in the rewinder in the upper winding or lower winding direction. The winding direction will be described in detail later in FIGS. 9 to 11. Additionally, the second controller (140_2) can transmit unwinding information (UWD) of the unwinder of the second process device (800) to the server (1020). The unwinder unwinding information (UWD) may include the unwinder unwinding direction related to whether the electrode sheet of the second process device (800) is unwinded from the unwinder in the upper or lower direction. In some embodiments, the server (1020) may know the unwinder unwinding information (UWD) of the unwinder in advance. In this case, the operation of the second controller (140_2) transmitting the unwinder unwinding information (UWD) of the unwinder of the second process device (800) to the server (1020) may be omitted. For example, in FIG. 14, step S207 may be omitted.

[0157] The winding direction of the rewinder and the unwinding direction of the unwinder will be described in detail later in FIGS. 9 to 11.

[0158] In some embodiments, the server (1020) may not transmit information or instructions for moving the marking recognizer (801) of the second process device (800) to the second controller (140_2) when the marking-related information (MI) includes a marking failure. That is, when the marking-related information (MI) includes a marking failure, the server (1020) may maintain the current position of the marking recognizer (801).

[0159] In some embodiments, the server (1020) may adjust the position of the marking recognition device (801) of the second process device (800) based on the marking-related information (MI), the winding information of the rewinder of the first process device (700), and the unwinding information of the unwinder of the second process device (800), when the marking-related information (MI) includes the success of the marking. For example, if the winding direction of the rewinder and the unwinding direction of the unwinder are the same, the server may transmit target position information (TPI) to the second controller (140_2) to move the marking recognition device to the opposite side of the position where the electrode sheet is marked. As another example, when the winding direction of the rewinder and the unwinding direction of the unwinder are different from each other, the server (1020) can transmit target position information (TPI) to the second controller (140_2) to move the marking recognizer (801) to the position where the electrode sheet was marked in the first process. That is, the server (1020) can generate target position information (TPI) for adjusting the position of the marking recognizer (801) based on the marking-related information (MI), the rewinder winding information (RWD) of the first process device (700), and the unwinding information (UWD) of the unwinder of the second process device (800). When the winding direction of the rewinder and the unwinding direction of the unwinder are the same, the server (1020) can generate target position information (TPI) such that the target position includes a position where the marking position in the first process is reversed left and right. When the winding direction of the rewinder and the unwinding direction of the unwinder are different, the server (1020) can generate target position information (TPI) such that the target position includes the same position as the marking position in the first process. A specific example of generating target position information (TPI) will be described in detail later in FIG. 12. The unwinding direction of the unwinder will be described in detail later in FIG. 9 to 11.

[0160] The second controller (140_2) can adjust the position of the marking recognizer (801) based on the target position information (TPI). For example, the second controller (140_2) can transmit a movement signal (MS) corresponding to the target position information (TPI) to the marking recognizer (801).

[0161] FIG. 8 is a drawing for illustrating communication between a first process device (700), a second process device (800), and a server (1020) according to an exemplary embodiment of the present disclosure.

[0162] FIG. 8 can be described with reference to FIG. 1 to 4 and FIG. 7, and parts that overlap with FIG. 7 may be omitted from the description.

[0163] The server (1020) can transmit winding information (RWD) and marking-related information (MI) of the rewinder of the first process device (700) to the second controller (800) without directly generating target location information. The second controller (800) can directly adjust the position of the marking recognition device (801) of the second process device (800) based on the marking-related information (MI), the winding information of the rewinder of the first process device (700), and the unwinding information of the unwinder of the second process device (800). For example, the second controller (140_2) can directly determine the target position of the marking recognition device (801) and transmit a movement signal (MS) to the marking recognition device (801) to move the marking recognition device (801) to the target position.

[0164] FIGS. 9 to 11 are drawings illustrating the relationship between the winding direction of a rewinder in a first process and the unwinding direction of an unwinder in a second process, according to an exemplary embodiment of the present disclosure. FIG. 9 shows the winding of an electrode sheet (ES) comprising first to fourth lanes (L1, L2, L3, L4).

[0165] In FIGS. 9 to 11, an example is shown in which the electrode sheet (ES) includes four lanes (L1, L2, L3, L4), but this is for illustrative purposes only and does not limit the technical concept of the present invention in any sense. The electrode sheet (ES) may include two, three, or five or more lanes.

[0166] Each of the first to fourth lanes (L1, L2, L3, L4) may extend in the direction of travel of the electrode sheet (ES) and may be an electrode sheet (ES) holding portion. Additionally, there may be one or more non-existent portions between the first to fourth lanes (L1, L2, L3, L4). For example, there may be a non-existent portion extending in the direction of travel of the electrode sheet (ES) between the second and third lanes (L2, L3), the first and second lanes (L1, L2) may be continuous in the transverse direction, and the third and fourth lanes (L3, L4) may be continuous in the transverse direction.

[0167] According to some embodiments, the electrode sheet (ES) may be wound onto the first electrode roll (R1) by an upper winding method. In the upper winding method, the electrode sheet (ES) may be wound onto the first electrode roll (R1) while positioned above the central axis of the rewinder (1113) of the first process. The upper winding may also be referred to as clockwise winding.

[0168] According to some other embodiments, the electrode sheet (ES) may be wound onto the second electrode roll (R2) by a lower winding method. In the lower winding method, the electrode sheet (ES) may be wound onto the second electrode roll (R2) while positioned below the center axis of the first rewinder (1113). The lower winding may also be referred to as counterclockwise winding.

[0169] In the case of the first electrode roll (R1), the upper surface of the electrode sheet (ES) may be outside the first electrode roll (R1) compared 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 outside the first electrode roll (R1) compared to the upper surface of the corresponding electrode sheet (ES).

[0170] FIG. 10 illustrates the unwinding aspects of the first electrode roll (R1) in a subsequent roll-to-roll process. In FIG. 10 and 11, hollow arrows indicate the direction of travel of the electrode sheet (ES). In FIG. 10 and 11, the rewinder (1113) may be the rewinder of the first process, and the unwinder (2111) may be the unwinder of the second process. According to one embodiment, the first process may be a coating process, and the second process may be any one of a roll press process, a slitting process, and a notching process. The second process may refer to a process performed later in time than the first process.

[0171] Referring to FIG. 10, the first electrode roll (R1) may be provided by the upper winding of a rewinder (1113) in a preceding roll-to-roll process (e.g., the first process). The first electrode roll (R1) may be loaded into an unwinder (2111) in a subsequent roll-to-roll process (e.g., the second process).

[0172] According to exemplary embodiments, as indicated by the arrow (T11), the unwinder (2111) may be configured to unwind an electrode sheet (ES) from a first electrode roll (R1) in an upward unwinding manner. In the upward unwinding, the electrode sheet (ES) may be positioned above the central axis of the unwinder (2111). The upward unwinding may also be referred to as clockwise unwinding.

[0173] In this case, the upper and lower sides of the electrode sheet (ES) are maintained, but the order of the first to fourth lanes (L1, L2, L3, L4) may be reversed. The upper surface (ESU) of the electrode sheet (ES) wound onto 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, L4) may be arranged from the left based on the direction of travel of the electrode sheet (ES), and in the subsequent roll-to-roll process, the first to fourth lanes (L1, L2, L3, L4) may be arranged from the right based on the direction of travel of the electrode sheet (ES).

[0174] That is, when the rewinder (1113) of the preceding roll-to-roll process (first process) is wound upward and the unwinder (2111) of the subsequent roll-to-roll process (second process) is unwound upward, the electrode sheet (ES) can be reversed left and right. Specifically, the left side relative to the direction of travel of the electrode sheet (ES) in the first process can become the right side relative to the direction of travel of the electrode sheet (ES) in the second process. Also, the right side relative to the direction of travel of the electrode sheet (ES) in the first process can become the left side relative to the direction of travel of the electrode sheet (ES) in the second process.

[0175] According to other exemplary embodiments, as indicated by the arrow (T12), the unwinder (2111) may be configured to unwind an electrode sheet (ES) from a first electrode roll (R1) in a downward unwinding manner. In downward unwinding, the electrode sheet (ES) may be located below the central axis of the unwinder (2111). Downward unwinding may also be referred to as counterclockwise unwinding.

[0176] In this case, the upper and lower sides of the electrode sheet (ES) are inverted, but the order of the first to fourth lanes (L1, L2, L3, L4) can be maintained. The upper surface (ESU) of the electrode sheet (ES) wound onto the first electrode roll (R1) in the preceding roll-to-roll process may 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) wound onto the first electrode roll (R1) in the preceding roll-to-roll process may 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 roll-to-roll process and the subsequent roll-to-roll process, the first to fourth lanes (L1, L2, L3, L4) may be arranged from the left based on the direction of travel of the electrode sheet (ES).

[0177] That is, when the rewinder (1113) of the preceding roll-to-roll process (first process) is wound upward and the unwinder (2111) of the subsequent roll-to-roll process (second process) is unwound downward, the electrode sheet (ES) can be inverted vertically. Specifically, the upper surface of the electrode sheet (ES) in the first process can become the lower surface of the electrode sheet (ES) in the second process. And, the lower surface of the electrode sheet (ES) in the first process can become the upper surface of the electrode sheet (ES) in the second process.

[0178] FIG. 11 shows the unwinding aspects of the second electrode roll (R2) in a subsequent roll-to-roll process.

[0179] Referring to FIG. 11, the second electrode roll (R2) can be provided by the lower winding of the rewinder (1113) in the preceding roll-to-roll process. The first electrode roll (R1) can be loaded into the unwinder (2111) of the subsequent roll-to-roll process.

[0180] According to exemplary embodiments, as indicated by the arrow (T21), the unwinder (2111) may be configured to unwind the electrode sheet (ES) from the second electrode roll (R2) in an upper unwinding manner.

[0181] In this case, the upper and lower sides of the electrode sheet (ES) are inverted, but the order of the first to fourth lanes (L1, L2, L3, L4) may be maintained. The upper surface (ESU) of the electrode sheet (ES) wound onto the second electrode roll (R2) in the preceding roll-to-roll process (e.g., the first process) may 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 (e.g., the second process). The lower surface (ESB) of the electrode sheet (ES) wound onto the second electrode roll (R2) in the preceding roll-to-roll process may 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 roll-to-roll process and the subsequent roll-to-roll process, the first to fourth lanes (L1, L2, L3, L4) may be arranged from the left based on the direction of travel of the electrode sheet (ES).

[0182] That is, when the rewinder (1113) of the preceding roll-to-roll process (first process) is wound downwards and the unwinder (2111) of the subsequent roll-to-roll process (second process) is unwound upwards, the electrode sheet (ES) can be inverted vertically. Specifically, the upper surface of the electrode sheet (ES) in the first process can become the lower surface of the electrode sheet (ES) in the second process. And, the lower surface of the electrode sheet (ES) in the first process can become the upper surface of the electrode sheet (ES) in the second process.

[0183] According to other exemplary embodiments, as indicated by the arrow (T22), the unwinder (2111) may be configured to unwind the electrode sheet (ES) from the second electrode roll (R2) in a downward unwinding manner.

[0184] In this case, the upper and lower sides of the electrode sheet (ES) are maintained, but the order of the first to fourth lanes (L1, L2, L3, L4) may be reversed. The upper surface (ESU) of the electrode sheet (ES) wound onto 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, L4) may be arranged from the left based on the direction of travel of the electrode sheet (ES), and in the subsequent roll-to-roll process, the first to fourth lanes (L1, L2, L3, L4) may be arranged from the right based on the direction of travel of the electrode sheet (ES).

[0185] That is, when the rewinder (1113) of the preceding roll-to-roll process (first process) is wound downwards and the unwinder (2111) of the subsequent roll-to-roll process (second process) is unwound downwards, the electrode sheet (ES) can be reversed left and right. Specifically, the left side relative to the direction of travel of the electrode sheet (ES) in the first process can become the right side relative to the direction of travel of the electrode sheet (ES) in the second process. Also, the right side relative to the direction of travel of the electrode sheet (ES) in the first process can become the left side relative to the direction of travel of the electrode sheet (ES) in the second process.

[0186] 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 subsequent roll-to-roll process (P2), the upper and lower surfaces of the electrode may be maintained or switched, and the order of the width direction of the first to fourth lanes (L1, L2, L3, L4) may be changed or maintained.

[0187] FIG. 12 is a table summarizing the transmission cases between the first controller, the second controller, and the server according to the embodiment of FIG. 7.

[0188] Referring to FIGS. 7 and FIGS. 12, the first controller (140_1) can transmit marking-related information (MI) to the server (1020). The marking-related information (MI) may include information on the position of a successful marking (Marking success position). That is, the marking-related information (MI) may include whether the marking was successful and the position of the marking (e.g., left or right relative to the direction of travel of the electrode sheet).

[0189] "Right" refers to the case where the marking is successful and the electrode sheet is marked on the right side relative to its direction of travel in the first process. "Left" refers to the case where the marking is successful and the electrode sheet is marked on the left side relative to its direction of travel in the first process.

[0190] The first controller (140_1) can transmit information regarding the winding direction, i.e., rewinder winding information (RWD), to the server (1020). If the winding direction is indicated as "over," it means upper winding, and if it is indicated as "under," it means lower winding.

[0191] The second controller (140_2) can transmit information regarding the unwinding direction, i.e., unwinder unwinding information (UWD), to the server (1020). If the unwinding direction is indicated as 'over', it means upper unwinding, and if it is indicated as 'under', it means lower unwinding.

[0192] In some embodiments, the server (1020) can generate target position information (TPI) for adjusting the position of the marking recognizer (801) of the second process device (800) based on marking-related information (MI), winding information (RWD) of the rewinder of the first process device (700), and unwinding information (UWD) of the unwinder of the second process device (800), and transmit it to the second controller.

[0193] The target position information (TPI) can basically be set so that when the winding direction of the rewinder and the unwinding direction of the unwinder are the same, the marking success position in the first process and the target position of the marking recognizer (801) in the second process are reversed left and right. That is, when the winding direction of the rewinder and the unwinding direction of the unwinder are the same, the target position information (TPI) can be set so that the target position of the marking recognizer (801) in the second process and the marking success position in the first process are opposite.

[0194] Target Position Information (TPI) can be configured to maintain the successful marking position when the winding direction of the rewinder and the unwinding direction of the unwinder are different. That is, when the winding direction of the rewinder and the unwinding direction of the unwinder are different, the Target Position Information (TPI) can be configured so that the target position and the successful marking position are the same.

[0195] In order for target position information (TPI) to be set considering the successful marking position, the winding direction of the rewinder, and the unwinding direction of the unwinder, it may be sufficient for the target position information (TPI) to have two distinct values. For example, as shown in FIG. 12, the target position information (TPI) may have a value of 1 or 2. The target position information (TPI) may have two distinct values ​​and is not limited to the embodiments described above. That is, the server (1020) according to an exemplary embodiment of the present disclosure may move the marking recognizer (801) to the target position or maintain the current position if it is already at the target position by transmitting the target position information (TPI) containing two logics to the second controller (140_2).

[0196] For example, as shown in FIG. 12, when the unwinding direction of the unwinder of the second process device (800) is upward unwinding and the winding direction of the rewinder of the first process device (700) is upward winding, when the second controller (140_2) receives target position information (TPI) including 2, the marking recognizer (801) can move to the left based on the direction of travel of the electrode sheet. As shown in FIG. 12, for the remaining seven cases, the TPI values ​​of 1 and 2 may be sufficient for the second controller (140_2) to move the marking recognizer (801) to the target position.

[0197] FIG. 13 shows a flowchart of a battery manufacturing method according to an exemplary embodiment of the present disclosure. FIG. 13 can be described with reference to FIG. 7 and FIG. 8.

[0198] Referring to FIG. 13, in step S101, the battery manufacturing system (10) can obtain winding information of the rewinder of the first process and unwinding information of the unwinder of the second process for the electrode sheet.

[0199] In step S103, the battery manufacturing system (10) can adjust the position of the marking recognition device of the second process based on the winding information of the rewinder and the unwinding information of the unwinder.

[0200] Meanwhile, the battery manufacturing system (10) may mark either the left or the right side based on the direction of travel of the electrode sheet in the first process. In some embodiments, the battery manufacturing system (10) may mark both the upper and lower surfaces of the electrode sheet. In some embodiments, the marking may be a reference point marking and / or a defect marking. The marking may include at least one of a reference point marking and a defect marking.

[0201] In some embodiments, when the winding direction of the rewinder and the unwinding direction of the unwinder are the same, the battery manufacturing system (10) may position the marking recognition device to the opposite side of the electrode sheet. As a specific example, the battery manufacturing system may maintain the position of the marking recognition device (801) when the position of the marking recognition device (801) is different from the one side of the electrode sheet. And, when the position of the marking recognition device is the same as the one side of the electrode sheet, the position of the marking recognition device (801) may be moved to the opposite side of the one side.

[0202] In some embodiments, when the winding direction of the rewinder and the unwinding direction of the unwinder are different from each other, the battery manufacturing system (10) may position the marking recognition device to the one side of the electrode sheet. As a specific example, when the position of the marking recognition device (801) is different from the one side of the electrode sheet, the battery manufacturing system (10) may move it to the one side of the electrode sheet. When the position of the marking recognition device (801) is the same as the one side of the electrode sheet, the battery manufacturing system (10) may maintain the position of the marking recognition device.

[0203] In some embodiments, the marking recognizer (801) can recognize the marking on either the upper or lower surface of the electrode sheet.

[0204] In some embodiments, the first process is a coating process, and the second process may be any one of a roll press process, a slitting process, and a notching process.

[0205] FIG. 14 shows a flowchart of a battery manufacturing method according to an exemplary embodiment of the present disclosure. FIG. 14 can be described with reference to FIG. 7 and FIG. 8.

[0206] Referring to FIG. 14, in step S201, marking can be performed on one side of the electrode sheet in the first process. For example, either a defect marker (1315) and a reference point marker (1351) can be marked on one side of the electrode sheet in the first process. In some embodiments, a defect marking portion (131) can provide a defect mark on one side of the outer blank portions of the electrode sheet. In some embodiments, a defect marking portion (131) can mark a reference point on one side of the outer blank portions of the electrode sheet. In some embodiments, a reference point marking portion (135) can mark a reference point on one side of the outer blank portions of the electrode sheet. In some embodiments, the marking may include a reference point marking and / or a defect marking. The marking may include at least one of a reference point marking and a defect marking.

[0207] In step S203, the first controller (140_1) can transmit marking-related information to the server (1020). In step S205, the first controller (140_1) can transmit winding information of the rewinder of the first process to the server (1020). In step S207, the second controller (140_2) can transmit unwinding information of the unwinder of the second process for the electrode sheet to the server (1020).

[0208] In step S209, the server (1020) can adjust the position of the marking recognition device of the second process based on at least one of marking-related information, winding information of the rewinder, and unwinding information of the unwinder.

[0209] In some embodiments, the marking-related information includes information on whether the marking was successful and information on the marking location, and the marking location information may include the right or left side based on the direction of travel of the electrode sheet. In some embodiments, the marking-related information may include location information of a successful marking. That is, the information on whether the marking was successful and the marking location information may be transmitted as location information of a successful marking.

[0210] In some embodiments, if the marking success information includes the marking failure, the server (1020) may maintain the current position of the marking recognizer. In some embodiments, the portion of the electrode sheet that failed to mark is not discarded but may be manually processed in a second process or a subsequent process.

[0211] In some embodiments, when the marking success information includes the marking success, the server (1020) can adjust the position of the marking recognition device of the second process based on the winding information of the rewinder and the unwinding information of the unwinder.

[0212] As a specific example, if the winding direction of the rewinder and the unwinding direction of the unwinder are the same, the server (1020) can position the marking recognition device on the opposite side of the electrode sheet. Here, if the position of the marking recognition device is different from the one side of the electrode sheet, the server (1020) can maintain the position of the marking recognition device, and if the position of the marking recognition device is the same as the one side of the electrode sheet, the marking recognition device (801) can be moved to the opposite side of the one side.

[0213] As a specific example, if the winding direction of the rewinder and the unwinding direction of the unwinder are different, the server (1020) can position the marking recognition device to the one side of the electrode sheet. If the position of the marking recognition device is different from the one side of the electrode sheet, the server (1020) can move the marking recognition device to the one side of the electrode sheet, and if the position of the marking recognition device is the same as the one side of the electrode sheet, the server (1020) can maintain the position of the marking recognition device.

[0214] In some embodiments, the server (1020) may generate target position information (TPI) of the marking recognition device based on at least one of the marking-related information, the winding information of the rewinder, and the unwinding information of the unwinder. The server (1020) may transmit the target position information to the second controller. The second controller may adjust the position of the marking recognition device based on the target position information. As a specific example, the marking-related information may include the marking position information, and the marking position information may include the right or left side based on the direction of travel of the electrode sheet. The target position information may have a first value or a second value based on the marking position information, the winding information of the rewinder, and the unwinding information of the unwinder.

[0215] Referring to FIG. 7 and FIG. 14, in some embodiments, the step of adjusting the position of the marking recognition device of the second process may include the step of the second controller adjusting the position of the marking recognition device based on at least one of the marking-related information, the winding information of the rewinder, and the unwinding information of the unwinder, wherein the server transmits the marking-related information and the winding information of the rewinder to the second controller.

[0216] Referring to FIGS. 8 and FIGS. 14, in some embodiments, the server may transmit marking-related information and winding information of the rewinder to a second controller. The second controller may adjust the position of the marking recognition device based on at least one of the marking-related information, winding information of the rewinder, and unwinding information of the unwinder.

[0217] In some embodiments, the marking recognition device can recognize the marking on either the upper or lower surface of the electrode sheet. Specifically, the marking recognition device may be installed to recognize either the upper or lower surface of the electrode sheet.

[0218] Meanwhile, the second process is a process that takes place later in time than the first process. In some embodiments, the first process is a coating process, and the second process may be any one of a roll press process, a slitting process, and a notching process.

[0219] FIG. 15 shows the arrangement of electrode sheets and marking portions moving between the unwinder and the rewinder of a first process apparatus according to an exemplary embodiment. FIG. 15 can be described with reference to FIGS. 1 to 14.

[0220] Referring to FIG. 15, the electrode sheet (ES1) is supplied from the unwinder and moves along the direction of travel (MD) toward the rewinder. In the drawing, TD represents the width direction (Transverse Direction), and Z may represent the thickness direction of the sheet (Thickness Direction).

[0221] In some embodiments, defect marking portions (131a, 131b) may be disposed on the unmarked portions (outer unmarked portions) (U1, U4) at both ends of the electrode sheet (ES1). These may be marking portions for indicating defect locations or defective sections on the sheet, and may have a defect mark (NG) printed on them or be formed in the form of adhesive tape or the like. In some embodiments, the defect marking portions (131a, 131b) may each be the defect marking portion (131) of FIG. 5. A defect mark (NG) may be displayed on each of the outer unmarked portions (U1, U4) of the electrode sheet (ES1). The location of the defect marking portion (131a) corresponds to the location of the unmarked portion (U1) and may be to the left relative to the direction of travel (MD). The location of the defect mark (NG) provided by the defect marking portion (131a) may be to the left relative to the direction of travel (MD). The location of the defective marking portion (131b) corresponds to the location of the blank portion (U4) and may be on the left side relative to the direction of travel (MD). The location of the defective mark (NG) provided by the defective marking portion (131b) may be on the right side relative to the direction of travel (MD).

[0222] In some embodiments, a reference point marking portion (135) may be disposed in the central portion of the electrode sheet (ES1). In some embodiments, the reference point marking portion (135) may be the reference point marking portion (135) of FIG. 6.

[0223] A plurality of unpaired portions (U1 to U4) and retaining portion lanes (L_1 to L_3) may be alternately arranged along the longitudinal direction (MD) of the electrode sheet (ES1). In some embodiments, the unpaired portions (U1 to U4) are areas where electrodes are not formed and may be used as cutting portions or insulating gap portions. The retaining portion lanes (L_1 to L_3) are located between adjacent unpaired portions and may be areas where an electrode active material is coated or a conductive layer is formed.

[0224] FIG. 16 is a flowchart of a method for transmitting marking-related information according to an exemplary embodiment. FIG. 16 can be described with reference to FIG. 1 to FIG. 15.

[0225] Referring to FIG. 15 and FIG. 16 together, at step S301, at least one marking section of the first process can be searched. For example, the first controller (140_1) can search for at least one marking section of the first process. The first controller (140_1) can search whether the marking sections placed in the first process are defective marking sections (131) or reference point marking sections (135). The number and arrangement of defective marking sections (131) and reference point marking sections (135) may differ for each piece of equipment for the first process. Additionally, there may be cases where the arrangement of defective marking sections (131) and reference point marking sections (135) of the equipment for the first process changes. Accordingly, the first controller (140_1) can be configured to search for marking sections for the first process.

[0226] In some embodiments, the first controller (140_1) can identify the type, number, and location of the marking area by receiving marking area information including the type, number, and location of the marking area. In some embodiments, the first controller (140_1) can search for the marking area by selecting a corresponding search algorithm after referring to the marking area information for the equipment of the first process stored in advance. Accordingly, the first controller (140_1) can distinguish whether the searched marking area is a defective marking area (131) or a reference point marking area (135). In some embodiments, the first controller (140_1) can search for the marking area based on the location after retrieving the expected location information of the marking area having a different arrangement pattern according to the type of equipment of the first process stored in advance. Accordingly, the first controller (140_1) can distinguish whether the searched marking area is a defective marking area (131) or a reference point marking area (135).

[0227] In step S303, it can be determined whether at least one marking part is a defective marking part. For example, a server (1020) can determine whether at least one marking part is a defective marking part (131). For example, a first controller (140_1) can determine whether at least one marking part is a defective marking part (131).

[0228] In step S305, if at least one marking part of the first process is a defective marking part (131), location information of at least one defective marking part of the first process may be transmitted to the server. The first controller (140_1) may transmit location information of the defective marking part (131) (i.e., location information of the defective mark) to the server (1020) when the defective marking part (131) among the marking parts placed in the first process succeeds in making a defective marking on both the upper and lower surfaces of the electrode sheet. The location information of the defective marking part (131) may be marking-related information (MI). In this case, the marking-related information (MI) may not include information on whether the marking was successful. This is because the first controller (140_1) may not transmit marking-related information (MI) to the server (1020) if the defective marking part (131) fails to make a defective marking on at least one of the upper and lower surfaces of the electrode sheet. As in the case of FIG. 16, when the position information of the defective marking part (131) includes both the left and right sides, the marking-related information (MI) may include both the left and right sides. Accordingly, the marking recognition device (801) of the second process may be placed on both the left and right sides, and position adjustment may not be required.

[0229] The first controller (140_1) can transmit location information of a reference point marking part (135) that has successfully marked both the upper and lower surfaces of the electrode sheet to the server (1020) when no defective marking part (131) is placed in the first process. In step S307, if all marking parts of the first process are reference point marking parts (135) (N), location information of the reference point marking part (135) of the first process can be transmitted to the server. For example, unlike FIG. 16, the reference point marking part (135) may be placed on the blank part (U1). In this case, the location information of the reference point marking part (135) may be to the left relative to the direction of travel (MD). Accordingly, the location information of the reference point of the first process may be to the left.

[0230] The present invention has been described in more detail above through drawings and embodiments. However, the configurations described in the drawings or embodiments described in this specification are merely one embodiment of the present invention and do not represent all technical concepts of the present invention; therefore, it should be understood that various equivalents and modifications that can replace them may exist at the time of filing this application.

Claims

1. A step of searching for marking portions of the first process; and A battery manufacturing method comprising the step of transmitting information related to the marking of the first process for the electrode sheet to a server when at least one of the above marking parts is a defective marking part.

2. In Paragraph 1, The above server includes a step of adjusting the position of a marking recognition device of the second process based on the marking-related information of the first process for the electrode sheet, winding information of the rewinder of the first process, and unwinding information of the unwinder of the second process. A battery manufacturing method in which the second process is a process that is later in time than the first process.

3. In Paragraph 1, A step of marking on one side based on the direction of travel of the electrode sheet in the first process above; and A battery manufacturing method comprising the step of the first controller transmitting winding information of the rewinder to the server.

4. In Paragraph 3, A battery manufacturing method characterized by further including the step of a second controller transmitting unwinding information of the unwinder for the electrode sheet to the server.

5. In Paragraph 1, The above marking-related information is, Includes information on whether marking was successful and information on the marking location, A battery manufacturing method in which the above marking position information includes the right or left side based on the direction of travel of the electrode sheet.

6. In Paragraph 5, The step of adjusting the position of the marking recognition device in the second process above is, A battery manufacturing method characterized in that, when the information on whether the marking is successful includes a marking failure, the server maintains the position of the marking recognizer.

7. In Paragraph 5, The step of adjusting the position of the marking recognition device in the second process above is, A battery manufacturing method characterized by adjusting the position of the marking recognition device of the second process based on the marking-related information, the winding information of the rewinder, and the unwinding information of the unwinder, when the marking success information includes the marking success.

8. In Paragraph 3, The step of adjusting the position of the marking recognition device in the second process above is, When the winding direction of the above rewinder and the unwinding direction of the above unwinder are the same, A battery manufacturing method characterized by positioning the above-mentioned marking recognition device on the opposite side of the above-mentioned electrode sheet.

9. In Paragraph 8, Positioning the above marking recognition device on the opposite side of the above electrode sheet is, If the position of the above marking recognition device is different from the above one side of the electrode sheet, the position of the above marking recognition device is maintained, and A battery manufacturing method characterized by moving the marking recognition device to the opposite side of the electrode sheet when the position of the marking recognition device is the same as the one side of the electrode sheet.

10. In Paragraph 3, The step of adjusting the position of the marking recognition device in the second process above is, A battery manufacturing method characterized by positioning the marking recognition device on one side of the electrode sheet when the winding direction of the rewinder and the unwinding direction of the unwinder are different from each other.

11. In Paragraph 10, Positioning the above marking recognition device on one side of the above electrode sheet is, If the position of the above marking recognition device is different from the above one side of the electrode sheet, the marking recognition device is moved to the above one side of the electrode sheet, and A battery manufacturing method characterized by maintaining the position of the marking recognition device when the position of the marking recognition device is the same as the one side of the electrode sheet.

12. In Paragraph 2, The step of adjusting the position of the marking recognition device in the second process above is, A step in which the server generates target position information of the marking recognition device based on at least one of the marking-related information, the winding information of the rewinder, and the unwinding information of the unwinder; The step of the server transmitting the target location information to the second controller; and A battery manufacturing method characterized by including the step of the second controller adjusting the position of the marking recognition device based on the target position information.

13. In Paragraph 12, The above marking-related information includes information on whether the marking was successful and information on the marking location, and The above marking position information includes the right or left side based on the direction of travel of the electrode sheet, A battery manufacturing method characterized in that the above target position information has a first value or a second value based on the above marking position information, the winding information of the above rewinder, and the unwinding information of the above unwinder.

14. In Paragraph 2, The step of adjusting the position of the marking recognition device of the second process above is, The step of the server transmitting the marking-related information and the winding information of the rewinder to the second controller; and A battery manufacturing method characterized by including a step in which the second controller adjusts the position of the marking recognition device based on the marking-related information, the winding information of the rewinder, and the unwinding information of the unwinder.

15. In Paragraph 2, A battery manufacturing method characterized in that the above marking recognition device recognizes the marking on either the upper or lower surface of the electrode sheet.

16. In Paragraph 3, The above marking step is, A battery manufacturing method characterized by marking both the upper and lower surfaces of the electrode sheet.

17. In Paragraph 2, The above first process is a coating process, and A battery manufacturing method characterized in that the second process is any one of a roll press process, a slitting process, and a notching process.

18. In Paragraph 3, The above marking step is, A battery manufacturing method characterized by marking at least one of a reference point and a defect mark.

19. In Paragraph 1, When at least one of the above marking parts is a defective marking part, the step of transmitting the marking-related information of the first process for the electrode sheet to the server is to transmit the marking-related information of the first process to the server when the defective marking is successful on both the upper and lower surfaces of the electrode sheet. A battery manufacturing method characterized in that the above marking-related information includes location information of the above defective marking.

20. A step of obtaining winding information of a rewinder of a first process for an electrode sheet and unwinding information of an unwinder of a second process for the electrode sheet; and The method includes a step of adjusting the position of the marking recognition device of the second process based on the winding information of the rewinder and the unwinding information of the unwinder. A battery manufacturing method in which the second process is later in time than the first process.

21. In Paragraph 20, A battery manufacturing method characterized by further including a step of marking either the left or right side of the electrode sheet in the first process above.

22. In Paragraph 20, The step of adjusting the position of the marking recognition device in the second process above is, A battery manufacturing method characterized by positioning the marking recognition device on the opposite side of the electrode sheet when the winding direction of the rewinder and the unwinding direction of the unwinder are the same.

23. In Paragraph 22, Positioning the above-mentioned marking recognition device on the opposite side of the above-mentioned electrode sheet is, If the position of the above marking recognition device is different from the above one side of the electrode sheet, the position of the above marking recognition device is maintained, and A battery manufacturing method characterized by moving the position of the marking recognition device to the opposite side of the electrode sheet when the position of the marking recognition device is the same as the one side of the electrode sheet.

24. In Paragraph 20, The step of adjusting the position of the marking recognition device in the second process above is, A battery manufacturing method characterized by positioning the position of the marking recognition device on one side of the electrode sheet when the winding direction of the rewinder and the unwinding direction of the unwinder are different from each other.

25. In Paragraph 24, Positioning the above-mentioned marking recognition device on one side of the above-mentioned electrode sheet is, If the position of the above marking recognition device is different from the above one side of the electrode sheet, it is moved to the above one side of the electrode sheet, and A battery manufacturing method characterized by maintaining the position of the marking recognition device when the position of the marking recognition device is the same as the one side of the electrode sheet.

26. In Paragraph 20, A battery manufacturing method characterized in that the above marking recognition device recognizes the marking on either the upper or lower surface of the electrode sheet.

27. In Paragraph 20, The above marking step is, A battery manufacturing method characterized by marking both the upper and lower surfaces of the electrode sheet.

28. In Paragraph 20, The above first process is a coating process, and A battery manufacturing method characterized in that the second process is any one of a roll press process, a slitting process, and a notching process.

29. In Paragraph 20, The above marking step is, A battery manufacturing method characterized by marking at least one of a reference point and a defect mark.

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