Battery manufacturing system and battery manufacturing method

Abstract

According to an exemplary embodiment, a system for manufacturing a battery is provided. The system is a battery manufacturing system in which an electrode sheet is unwound from a first electrode roll and the electrode sheet is wound onto a second electrode roll, and includes a server configured to store coordinate data of the first electrode roll and reference point data representing the reference point of the first electrode roll; a PLC (Programmable Logic Controller) configured to load the coordinate data of the first electrode roll and the reference point data from the server; and a reference point sensor configured to sense the reference point of the electrode sheet unwound from the first electrode roll and generate a reference point sensing signal, wherein the PLC may be configured to acquire coordinate data of the second electrode roll by calibrating the inverted coordinate value of the stored coordinate value included in the coordinate data of the first electrode roll based on the inverted coordinate value of the stored reference point coordinate value included in the reference point data and the coordinate value of the sensed reference point.

Description

Technical Field

[0001] The present invention relates to a system for manufacturing a battery and a method for manufacturing a battery.

[0002] This application claims the benefit of priority based on Korean Patent Application No. 10-2023-0117944 filed on September 5, 2023, and all the contents disclosed in the document of the Korean patent application are included as part of this specification.

Background Art

[0003] A battery (secondary battery), unlike a primary battery, can be charged and discharged multiple times. Batteries are widely used as an energy source for various wireless devices such as handsets, notebook computers, and wireless vacuum cleaners. In recent years, due to the improvement of energy density and economies of scale, the manufacturing cost per unit capacity of batteries has been significantly reduced, and as the cruising range of BEVs (battery electric vehicles) increases to a level equivalent to that of fuel vehicles, the main use of batteries has shifted from mobile devices to mobility.

[0004] A battery is manufactured through an electrode process, an assembly process, and an activation process. Among them, the electrode process is the most crucial process for determining the yield and performance of battery cells. The electrode process can include a coating process, a roll pressing process, and a slitting process. In the coating process, an active material and an insulating material can be coated on the surface of a current collector. In the roll pressing process, the electrode can be pressed by a pressure roll. The roll pressing process can determine the density, performance, and surface quality of the electrode. In the slitting process, the electrode can be cut into a plurality of electrodes according to the design of the battery cell.

Summary of the Invention

Problems to be Solved by the Invention

[0005] The technical concept of this invention aims to solve the problem of providing a battery manufacturing system and battery manufacturing method with improved reliability and traceability. [Means for solving the problem]

[0006] According to an exemplary embodiment of the present invention for solving the above-mentioned problems, a system for manufacturing a battery is provided. The system is a battery manufacturing system in which an electrode sheet is unwound from a first electrode roll and the electrode sheet is wound onto a second electrode roll, and includes a server configured to store coordinate data of the first electrode roll and reference point data representing the reference point of the first electrode roll, a PLC (Programmable Logic Controller) configured to load the coordinate data of the first electrode roll and the reference point data from the server, and a reference point sensor configured to sense the reference point of the electrode sheet unwound from the first electrode roll and generate a reference point sensing signal, wherein the PLC can be configured to acquire coordinate data of the second electrode roll by calibrating the inverted coordinate value of the stored coordinate value included in the coordinate data of the first electrode roll based on the inverted coordinate value of the stored reference point coordinate value included in the reference point data and the coordinate value of the sensed reference point.

[0007] By inverting the above coordinate values, the starting coordinate value of the coordinate data for the first electrode roll can be calibrated to the ending coordinate of the coordinate data for the second electrode roll, and the ending coordinate value of the coordinate data for the first electrode roll can be calibrated to the starting coordinate of the coordinate data for the second electrode roll.

[0008] The inversion of the reference point coordinate values ​​stored as described above, and the inversion of the stored coordinate values ​​included in the coordinate data, can be performed by the server or the PLC.

[0009] The PLC calculates the offset between the stored coordinate values ​​of the reference point and the sensed coordinate values ​​of the reference point, and the server can calibrate the inverted coordinate values ​​of the stored coordinate values ​​of the first electrode roll, which are inverted based on the offset.

[0010] The PLC described above can calibrate the sensed reference point coordinate value based on the offset length, which is the length of the electrode sheet interposed between the unwinder from which the first electrode roll is unwound and the electrode sheet portion at the time the reference point is sensed.

[0011] The server described above can store a first roll map containing the coordinate data and reference point data of the first electrode roll.

[0012] The server can generate a second roll map of the second electrode roll based on the reference point sensing data and the coordinate data of the second electrode roll acquired, or correct the coordinate data of the generated second roll map.

[0013] According to an exemplary embodiment, a battery manufacturing method is provided, which involves unwinding an electrode sheet from an electrode roll and winding the electrode sheet onto a second electrode roll. The method may include the steps of: loading coordinate data including stored coordinate values ​​of a first electrode roll and reference point data including stored reference point coordinate values ​​of the first electrode roll; sensing a reference point of the electrode sheet unwound from the first electrode roll and collecting reference point sensing data including sensed reference point coordinate values; and obtaining coordinate data of the second electrode roll by calibrating the inverted coordinate values ​​of the stored coordinate values ​​of the first electrode roll based on the inverted coordinate values ​​of the stored reference point coordinate values ​​and the sensed reference point coordinate values.

[0014] The above method may further include the step of discarding defective portions of the electrode sheet unwound from the first electrode roll based on the calibrated coordinate values.

[0015] By inverting the above coordinate values, the starting coordinate value of the coordinate data for the first electrode roll can be calibrated to the ending coordinate of the coordinate data for the second electrode roll, and the ending coordinate value of the coordinate data for the first electrode roll can be calibrated to the starting coordinate of the coordinate data for the second electrode roll.

[0016] In the above method, the offset between the stored reference point coordinate value and the sensed reference point coordinate value can be calculated, and based on the offset, the inverted coordinate value of the stored coordinate value of the first electrode roll can be calibrated.

[0017] The sensed reference point coordinate values ​​can be calibrated based on the offset length, which is the length of the electrode sheet interposed between the unwinder from which the first electrode roll is unwound and the electrode sheet portion at the time the reference point is sensed.

[0018] The coordinate data and reference point data of the first electrode roll can be loaded based on a first roll map of the first electrode roll, which includes the coordinate data and reference point data.

[0019] Based on the above reference point sensing data and the acquired coordinate data of the second electrode roll, a second roll map of the second electrode roll can be generated, or the coordinate data of the generated second roll map can be corrected.

[0020] As one embodiment, a second electrode roll can be provided, which is formed by winding up an electrode sheet having a plurality of first reference points along the longitudinal direction into a first electrode roll, and then winding up the electrode sheet that has been unwound from the first electrode roll.

[0021] The electrode sheet of the second electrode roll described above may be configured to have a plurality of second reference points corresponding to the plurality of first reference points, and each second reference point may be located at a position offset from the longitudinal position of the inverted electrode sheet of each first reference point or at a position offset from the longitudinal position of the inverted electrode sheet.

Advantages of the Invention

[0022] According to an exemplary embodiment of the present invention, a system configured to generate a roll map that enables feedback, feedforward, and tracking for an electrode process and perform a battery manufacturing process based on the roll map, and a battery manufacturing method using the same can be provided.

[0023] The effects obtainable from the exemplary embodiments of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly derived and understood by those having ordinary knowledge in the technical field to which the exemplary embodiments of the present disclosure belong from the following description. That is, unintended effects associated with implementing the exemplary embodiments of the present disclosure can also be derived by those having ordinary knowledge in the technical field from the exemplary embodiments of the present disclosure.

Brief Description of the Drawings

[0024] [Figure 1] Shows a battery manufacturing system according to an exemplary embodiment. [Figure 2] Is a flowchart showing a battery manufacturing method according to an exemplary embodiment. [Figure 3] Shows a battery manufacturing system according to an exemplary embodiment.

Modes for Carrying Out the Invention

[0025] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Before that, terms and words used in this specification and the claims are not to be construed as being limited to ordinary or dictionary meanings, but are to be construed as meanings and concepts consistent with the technical idea of the present invention based on the principle that the inventor can appropriately define the concept of the terms in order to explain his own invention in the best way.

[0026] Therefore, the embodiments described herein and the configurations shown in the drawings represent only one of the most preferred embodiments of the present invention and do not represent the entire technical concept of the present invention; there may be a variety of equivalents and modifications that can substitute for them at the time of filing.

[0027] Furthermore, in describing the present invention, if it is determined that a specific description of a related known configuration or function may obscure the gist of the present invention, such detailed description will be omitted.

[0028] Since embodiments of the present invention are provided to give a more complete explanation to an ordinary person of the art, the shapes and sizes of components in the drawings may be exaggerated, omitted, or shown schematically for the sake of clarity. Accordingly, the sizes and proportions of each component do not fully reflect the actual sizes and proportions.

[0029] (First Embodiment) Figure 1 shows a battery manufacturing system 100 according to an exemplary embodiment.

[0030] Referring to Figure 1, the battery manufacturing system 100 may include an unwinder 111, a rewinder 113, a splicing table 115, a scrap port 117, a processing mechanism 119, a first rotary encoder 121, a second rotary encoder 125, an NG sensor 131, a reference point sensor 133, a roll map PLC (Programmable Logic Controller) 141, a process PLC 143, an EIF (Equipment Interface) 145, a server 150, and a display device 160.

[0031] A battery manufacturing system 100 can be configured to generate a roll map containing data on an electrode sheet ES. The roll map can represent the electrode sheet ES based on coordinate values ​​indicating its position on the electrode sheet ES. Processes for manufacturing a battery can be performed on the electrode sheet ES, as described later. The roll map can represent the history of processes performed on the electrode sheet ES and may include data related to coordinates. This allows the roll map to enable feedback, feedforward, and tracking of the battery manufacturing process, as described later.

[0032] The first electrode roll ER1, on which the preceding process (first process) is performed, can be loaded into the unwinder 111. The unwinder 111 can unwind the electrode sheet ES from the first electrode roll ER1. The rewinder 113 can wind the electrode sheet ES to form the second electrode roll ER2. The electrode sheet ES is wound onto the second electrode roll ER2 and can be cut and separated after reaching a predetermined winding length. This allows the electrode sheet ES to move between the unwinder 111 and the rewinder 113 while the current process (second process) is being performed.

[0033] Roll maps can be generated in lot units. A lot is a production unit of a roll-to-roll process, and the second electrode roll ER2, which is separated after achieving the unwinding amount target, is an example of a lot. Similarly, the first electrode roll ER1, which is newly loaded into the unwinder 111, is also an example of a lot. This allows the server 150 to save the first roll map of the previous process. The first roll map can correspond to the first electrode roll ER1. The server 150 can also generate and save the second roll map of the current process. The second roll map can correspond to the second electrode roll ER2.

[0034] A process for manufacturing a battery (e.g., an electrode process) can be carried out on the electrode sheet ES. Since the electrode process is performed on the electrode sheet ES which is unwound from the first electrode roll ER1 and wound onto the second electrode roll ER2, the electrode process can also be called a roll-to-roll process.

[0035] Time-series data, structured over time in a roll map (i.e., according to the progress of the process), can be associated with coordinate data based on the amount of movement of the electrode sheet ES (i.e., either consumption or input).

[0036] For example, the first roll map may include coordinate data CD1 of the first electrode roll ER1 and reference point data DPD representing a reference point (first reference point). The coordinate data CD1 may include coordinate values ​​indicating the position of the first electrode roll ER1.

[0037] As a non-limiting example, the second role map can be generated by updating the first role map. Alternatively, the second role map may be generated based on data acquired in the current process without loading the first role map.

[0038] The outer part of the first electrode roll ER1 is wound inward in the second electrode roll ER2, and the inner part of the first electrode roll ER2 is wound outward in the second electrode roll ER2. As a result, the end coordinate value of the coordinate data of the first electrode roll ER1 (the maximum coordinate value of the first process), i.e., the coordinate value of the starting part of the electrode sheet ES unwound from the first electrode roll ER1, becomes the start coordinate value of the coordinate data of the second electrode roll ER2 (the minimum coordinate value of the second process), i.e., the coordinate value of the innermost part of the second electrode roll ER2. Conversely, the start coordinate value of the coordinate data of the first electrode roll ER1 (the minimum coordinate value of the first process), i.e., the coordinate value of the end part of the electrode sheet ES unwound from the first electrode roll ER1, becomes the end coordinate value of the coordinate data of the second electrode roll ER2 (the maximum coordinate value of the second process), i.e., the coordinate value of the outermost part of the second electrode roll ER2.

[0039] Therefore, when generating the second roll map, such inversion of coordinate values ​​must be taken into consideration. Alternatively, even when acquiring data in the current process and generating the second roll map independently, the coordinate data of the second roll map must be corrected as described later in order to compare the state of the same physical electrode with that of the previous process.

[0040] Thus, the generation of the second roll map of the second electrode roll ER2 may include inverting the coordinate data of the first roll map of the first electrode roll ER1. By inverting the coordinate data, the start coordinates of the first roll map can be calibrated to the end coordinates of the second roll map, and the end coordinates of the first roll map can be calibrated to the start coordinates of the second roll map.

[0041] For example, if the start coordinate of the first roll map of the first electrode roll ER1 is S1 and the end coordinate is E1, any coordinate X of the first roll map of the first electrode roll ER1 can be calibrated to the coordinate X' of the second roll map of the second electrode roll ER2 according to Equation 1 below.

[0042] [Formula 1] X'=E1-(X-S1)

[0043] For example, if the starting coordinate of the first roll map is 0 and the ending coordinate is 1600, then coordinate 100 can be calibrated to 1600 - (100 - 0) = 1500. Here, the coordinate values ​​are expressed in arbitrary units.

[0044] The coordinate data of the second roll map of the second electrode roll ER2 is calibrated according to Equation 1 above, but the relationship between the coordinate data and other data of the first roll map (e.g., measurement data and inspection data) remains unchanged. That is, the data value related to coordinate X of the first roll map of the first electrode roll ER1 can be matched with the coordinate X' of the second roll map of the second electrode roll ER2.

[0045] For example, the first roll map may include coordinate data CD1 of the first electrode roll ER1 and reference point data DPD representing a reference point.

[0046] The coordinate data CD1 may contain stored coordinate values ​​indicating the position of each portion of the electrode sheet ES on the first electrode roll ER1. Table 1 below shows examples of coordinate data CD1 at multiple locations on the first electrode roll ER1 that winds up an electrode sheet ES with a total length of 2000m.

[0047] [Table 1]

[0048] The values ​​in the first column represent the stored coordinate values ​​for multiple locations on the electrode sheet ES when it is wound onto the first electrode roll ER1 in the first process. Larger coordinate values ​​indicate locations on the outer part of the first electrode roll ER1, while smaller coordinate values ​​indicate locations on the inner part of the first electrode roll ER1. These multiple locations may be the locations of defective areas or sections detected during the execution of the first process.

[0049] The values ​​in the second column represent the inverted coordinate values ​​when the positions corresponding to multiple locations on the first electrode roll ER1 are wound onto the second electrode roll ER2 in the second process. Positions with larger inverted coordinate values ​​are located further inside the first electrode roll ER1, while positions with smaller inverted coordinate values ​​are located further outside the first electrode roll ER1.

[0050] The inverted coordinate values ​​can be calculated using Equation 1 above.

[0051] The reference point data DPD may include a sequence value indicating the order of reference points on the electrode sheet ES, and coordinate values ​​that match the above sequence value. Table 2 below shows an example of the reference point data DPD acquired in the first process and the inverted coordinate values ​​of that reference point data when the total length of the electrode sheet wound onto the first electrode roll ER1 is 2000m.

[0052] [Table 2]

[0053] Reference points (first reference points) can be formed at equal intervals on the electrode sheet ES. In Table 2, the interval between reference points is 100m, but this is for illustrative purposes only and does not limit the technical concept of the present invention in any way. The interval between reference points can be determined according to the requirements for the precision of tracking process events on the electrode sheet ES.

[0054] In the first step, the lower-priority reference point can be formed after the higher-priority reference point. When the lower-priority reference point is wound onto the first electrode roll ER1 in the first step, it can have a relatively large coordinate value relative to the amount of electrode sheet being fed in. On the other hand, the higher-priority reference point can have a relatively small coordinate value relative to the amount of electrode sheet being fed in. Since the lower-priority reference point is wound onto the outside of the first electrode roll ER1, it is reversed when the first electrode roll ER1 is unwound from the second step, and can have a relatively small coordinate value relative to the amount of electrode sheet being fed in.

[0055] The inversion of the stored reference point coordinate values ​​and the inversion of the stored coordinate values ​​included in the above coordinate data can be performed by a server or PLC.

[0056] Battery manufacturing involves a series of distinct processes, where the leading process influences the following process. In this context, it is difficult to reflect the time-series data of the leading process in the following process if it does not directly match the real-world workpieces, intermediate products, and finished products. Below, we will refer to the correction of the following process based on data generated according to the results of the leading process as feedforward.

[0057] Here, "workpiece" refers to an article provided as a result of each process, such as an electrode sheet ES, which undergoes coating, roll pressing, and slitting processes. "Semi-finished product" can refer to one of the separation membranes, electrodes, or assemblies thereof that are cut by a notching process. A semi-finished product may also be a structure including a housing and an electrode assembly housed within the housing (in some cases, the structure further includes an electrolyte). "Product" refers to an article that is processed by an activation process to be operational as a battery. The above definitions of workpiece, semi-finished product, and product relate to only one aspect of them and do not preclude the usual definitions of them.

[0058] The electrode process includes a series of roll-to-roll processes. For feedforward, time-series data needs to be associated with the positions of images of real-world workpieces, parts, semi-finished products, and finished products. Here, feedforward may include controlling the process on the electrode sheet ES based on a roll map of the first electrode roll ER1 generated in the previous process. The roll map can associate time-series data with coordinate data that includes coordinate values ​​indicating the positions of images of real-world workpieces, parts, semi-finished products, and finished products. Based on the coordinate data, the roll map can provide a matching between time-series data and real-world workpieces, parts, semi-finished products, and finished products. Thus, the generation of roll maps and feedforward based on roll maps can achieve improved production efficiency and quality by quantifying and objectifying aspects of the process that were previously dependent on the arbitrary actions of the operator.

[0059] Furthermore, the roll map of a preceding lot may be used to improve the process for a subsequent lot, and such action may be called process feedback. Process feedback using a roll map may include identifying process conditions and process parameters that cause problems and defects based on the data contained in the roll map. For example, a second roll map may be generated for a second electrode roll ER2 that winds the electrode sheet ES being processed in the current process, and the processing of a subsequent lot may be controlled based on the second roll map.

[0060] Furthermore, as described later, roll maps are generated cumulatively for the workpieces, parts, semi-finished products, and finished products of each unit process, enabling the tracking of process history for shipped products (e.g., battery cells, battery modules, or battery packs). As an example, a cell ID formed on the electrode assembly or case of a battery cell may be included. The cell ID may include lot numbers and coordinate information of the electrodes and separator membranes contained in the battery cell. In other words, the cell ID can be associated with the roll map of the electrodes and separator membranes contained in the battery cell. This allows for the retrieval of historical data of the manufacturing of a battery cell based on its cell ID if an event such as a quality problem occurs in a battery cell that has already been shipped.

[0061] The first rotary encoder 121 can be configured to sense the amount of electrode sheet ES unwound from the first electrode roll ER1 by the unwinder 111. This allows the first rotary encoder 121 to generate an input amount signal UWAS indicating the length of the electrode sheet ES unwound by the unwinder 111. The first rotary encoder 121 can be configured to transmit the input amount signal UWAS to the roll map PLC 141. The roll map PLC 141 can be configured to collect input amount data based on the electrode sheet ES input amount signal UWAS.

[0062] The second rotary encoder 125 can be configured to sense the amount of electrode sheet ES being wound onto the second electrode roll ER2 by the rewinder 113. This allows the second rotary encoder 125 to generate a wear signal WAS indicating the length of electrode sheet ES being wound by the rewinder 113. The second rotary encoder 125 can be configured to transmit the wear signal WAS to the roll map PLC 141. The roll map PLC 141 can be configured to collect wear data based on the wear signal WAS of the electrode sheet ES.

[0063] The roll map PLC141 can be configured to collect coordinate data of the electrode sheet ES based on either the input amount signal UWAS or the consumption amount signal WAS of the electrode sheet ES.

[0064] For example, the roll map PLC141 can determine the distance the electrode sheet ES travels from the unwinder 111 based on the input signal UWAS of the electrode sheet ES. This allows the roll map PLC141 to be configured to determine the coordinates within the electrode sheet ES of the portion of the electrode sheet ES being unwound by the unwinder 111 at each point in time when the processing mechanism 119 is performing its operations.

[0065] As another example, the roll map PLC141 can determine the distance the electrode sheet ES travels to the rewinder 113 based on the wear signal WAS of the electrode sheet ES. This allows the roll map PLC141 to be configured to determine the coordinates within the electrode sheet ES of the portion of the electrode sheet ES being wound up by the rewinder 113 at each point in time when the process by the processing mechanism 119 is performed.

[0066] The following describes the technical concept of the present invention, focusing on an embodiment in which the roll map PLC141 collects coordinate data based on the input amount signal UWAS of the electrode sheet ES. When coordinate data is collected based on the input amount signal UWAS, the amount of unwound electrode sheet ES can be sensed, so the loss of electrode sheet ES induced by factors such as sample testing of the first electrode roll ER1, movement of the first electrode roll ER1 from the previous process stage to the current process stage, loading of the first electrode roll ER1 into the unwinder 111, connection between the electrode sheet ES of the loaded first electrode roll ER1 and the electrode sheet ES on the rewinder 113 side, and remaining amount due to unwounding failure can be precisely determined.

[0067] According to an exemplary embodiment, the roll map PLC141 may also be configured to further collect additional coordinate data based on the consumption signal WAS. In this case, the coordinate data collected based on the input signal UWAS can be used to calibrate the coordinate data CD and reference point data DPD transmitted from the previous process roll map (i.e., the first roll map of the first electrode roll ER1), and the additional coordinate data collected based on the consumption signal WAS can be used to generate the current process roll map (i.e., the second roll map of the completed second electrode roll ER2).

[0068] The coordinate data may include coordinate values ​​that match each part of the electrode sheet ES. That is, each of any points on the electrode sheet ES can be matched with a coordinate. The coordinate values ​​may be, but are not limited to, one-dimensional quantities in the longitudinal direction of the electrode sheet ES. The coordinate values ​​may also be two-dimensional quantities in the longitudinal direction and the width direction of the electrode sheet ES.

[0069] The NG sensor 131 can be configured to detect either an NG mark or an NG tag on the electrode sheet ES. The NG mark can be formed, for example, by an inkjet printer, and may contain information about the location and type of defect. The NG tag can be attached to the electrode sheet ES by an operator or an NG tag attacher, and may indicate the location of a defect on the electrode sheet ES. As a non-limiting example, the NG sensor 131 may include either a vision machine or a color sensor.

[0070] The NG sensor 131 can be configured to detect either an NG mark or an NG tag on the electrode sheet, and transmit the NG detection signal NSS to the roll map PLC 141.

[0071] The rollmap PLC141 can be configured to collect NG detection data NSD based on the NG detection signal NSS and coordinate data. The rollmap PLC141 can be configured to collect NG detection data NSD by associating the NG detection signal NSS with coordinate data. The NG detection data NSD may include, for example, a defect value indicating the presence or absence and nature of the defect, and coordinate values ​​that are matched to the defect value.

[0072] To collect NG detection data NSD, the coordinate data can be calibrated based on the offset length OL1. Calibrating the coordinate data involves compensating for the difference between the portion of the electrode sheet ES sensed by the first rotary encoder 121, i.e., the portion of the electrode sheet ES unwound by the unwinder 111, and the portion of the electrode sheet ES sensed by the NG sensor 131.

[0073] According to an exemplary embodiment, the roll map PLC141 can calibrate coordinate data collected at the same time as the NG detection signal NSS based on an offset length OL1 to collect NG detection data NSD, and associate the calibrated coordinate data with the NG detection signal NSS.

[0074] The offset length OL1 is the length of the electrode sheet ES between the NG sensor 131 and the unwinder 111, corresponding to the movement path of the electrode sheet ES. The offset length OL1 may be the same as the straight-line distance between the NG sensor 131 and the unwinder 111, or it may be longer than the straight-line distance between the NG sensor 131 and the unwinder 111.

[0075] The reference point sensor 133 can be configured to sense reference points on the electrode sheet ES in order to collect reference point data of the electrode sheet ES. The reference point sensor 133 can include, for example, an OCR barcode reader. Each of the reference points on the electrode sheet ES can include an arbitrary identification mark (e.g., a one-dimensional or two-dimensional barcode) that contains information about the direction of movement of the electrode sheet ES and the order in which the reference points are formed in the process of forming the reference points. The reference point sensor 133 can be configured to sense the reference points on the electrode sheet ES in order to generate a reference point sensing signal DSS. The reference point sensor 133 can be configured to transmit the reference point sensing signal DSS to the roll map PLC 141.

[0076] The rollmap PLC141 can be configured to collect reference point sensing data DSD based on coordinate data and reference point sensing signal DSS. The rollmap PLC141 can be configured to collect reference point sensing data DSD by associating the reference point sensing signal DSS with coordinate data. The reference point sensing data DSD may include, for example, the order of the reference points and the coordinate values ​​matched to the reference points.

[0077] To collect reference point sensing data DSD, the coordinate data can be calibrated based on the offset length OL2. The calibration of the coordinate data involves compensating for the difference between the portion of the electrode sheet ES sensed by the first rotary encoder 121, i.e., the portion of the electrode sheet ES unwound by the unwinder 111, and the portion of the electrode sheet ES sensed by the reference point sensor 133.

[0078] According to an exemplary embodiment, the roll map PLC141 can be configured to calibrate coordinate data collected at the same time as the reference point sensing signal DSS based on an offset length OL2, so as to collect reference point sensing data DSD, and to associate the calibrated coordinate data with the reference point sensing signal DSS.

[0079] The offset length OL2 is the length of the electrode sheet ES between the reference point sensor 133 and the unwinder 111, corresponding to the movement path of the electrode sheet ES. The offset length OL2 may be the same as the straight-line distance between the reference point sensor 133 and the unwinder 111, or it may be longer than the straight-line distance between the reference point sensor 133 and the unwinder 111.

[0080] The offset length OL2 may include a first portion OL2_1 and a second portion OL2_2. The first portion OL2_1 may be the portion not processed by the processing mechanism 119, and the second portion OL2_2 may be the portion processed by the processing mechanism 119. As a result, the length characteristics of the first portion OL2_1 may differ from those of the second portion OL2_2. For example, if the processing mechanism 119 includes a pressure roll for a roll pressing process, the first portion OL2_1 may not be stretched, while the second portion OL2_2 may be stretched. According to an exemplary embodiment, in the calibration of the offset length OL2, the first portion OL2_1 may be calibrated differently from the second portion OL2_2. For example, the calibration of the second portion OL2_2 can compensate for the change in length characteristics due to the processing mechanism 119 by inverse calculation of the elongation rate.

[0081] According to an exemplary embodiment, the roll map PLC 141 can be configured to transmit NG detection data NSD and reference point detection data DSD to the process PLC 143. Alternatively, it can be configured to transmit reference point data CD1 from the process PLC 143.

[0082] The roll map PLC 141 and / or process PLC 143 can be configured to compare reference point data DPD (e.g., first reference point data) with sensed reference point data DSD (e.g., second reference point data). In this case, the inversion of the stored coordinate values ​​of the reference point data DPD is performed by the server 150, and the roll map PLC 141 or process PLC 143 can receive the reference point data DPD with the inverted coordinate values ​​from the server 150. Alternatively, the roll map PLC 141 or process PLC 143 can receive the reference point data DPD from the server without inversion, and the PLC can invert the stored reference point coordinate values ​​of the reference point data DPD.

[0083] In either case, the roll map PLC141 and / or process PLC143 can be configured to compare the inverted coordinate values ​​of the stored reference point coordinate values ​​included in the reference point data DPD with the sensed reference point data DSD.

[0084] The roll map PLC141 and / or process PLC143 may be configured to calibrate the coordinate data of the defective area based on the NG detection data NSD. Calibrating the coordinate data of the defective area based on the NG detection data NSD may include calibrating the coordinate values ​​of the defective area based on the coordinate values ​​of the NG detection data NSD if the coordinate values ​​of the defective area coordinate data do not match the coordinate values ​​of the NG detection data NSD.

[0085] Table 3 shows examples of DSD data for the detected reference points.

[0086] [Table 3]

[0087] The second column of Table 3 is the (first) reference point data DPD acquired in the pre-processing (first process) of the first electrode roll ER1. The third column of Table 3 is the data obtained by inverting the above reference point data DPD. The second and third columns are the same as the data shown in Table 2.

[0088] The fourth column of Table 3 shows the reference point data DSD (second reference point data) sensed in the current process (second process). The display format of the sensed reference point data DSD is not limited to a table as described above. The sensed reference point data DSD can have any format, including matching between the order of the reference points and their coordinate values.

[0089] The roll map PLC141 and / or process PLC143 can be configured to calculate an offset, which is the difference between the inverted coordinate values ​​of the stored reference point coordinate values ​​in the reference point data DPD and the sensed reference point coordinate values ​​in the reference point sensing data DSD. Column 5 of Table 2 shows the offset calculated by the roll map PLC141 and / or process PLC143. The roll map PLC141 and / or process PLC143 can be configured to calibrate the inverted coordinate values ​​of the stored coordinate values ​​contained in the coordinate data CD1 of the first electrode roll ER1 based on the offset.

[0090] Table 4 shows the coordinate data calibrated by the roll map PLC141 and / or process PLC143. Calibration of the coordinate data CD1 can be triggered by sensing a reference point. In Table 4, 19 reference points are shown at once, but calibration of the coordinate data CD1 can be performed each time a reference point is sensed.

[0091] [Table 4]

[0092] More specifically, the roll map PLC141 or process PLC143 compares the sensed reference point coordinate value with the inverted coordinate value of the stored reference point coordinate value, and if the sensed reference point coordinate value and the stored reference point coordinate value are different, it can perform calculations to calculate the offset. For example, when the preferentially arriving reference point 19 is sensed, the sensed 95m does not match the inverted reference point coordinate value 100m, so the roll map PLC141 or process PLC143 can calculate an offset of 5m. Subsequently, the coordinate value "120" adjacent to reference point 19 can be calibrated to "115" based on the offset value "5". Subsequently, the coordinate value "130" adjacent to reference point 19 can also be calibrated to "125" based on the offset value "5". Furthermore, the coordinate values ​​"710" and "730," adjacent to reference point 13, can be calibrated to "695" and "715," respectively, based on an offset value of "15." Unlike in Table 4, different offsets may be applied depending on the coordinate position of electrode sheet ES.

[0093] The coordinate values ​​calibrated in this way can be obtained as coordinate data CD2 of the second electrode roll (or the second roll map for the second electrode roll).

[0094] The coordinate values ​​stored in the coordinate data DD of the first roll map of the first electrode roll ER1 may not match the coordinate values ​​of the actual electrode sheet ES unwound from the first electrode roll ER1. Such discrepancies may be caused by losses due to sample testing of the first electrode roll ER1, losses that occur while moving the first electrode roll ER1, losses that occur while loading the first electrode roll ER1 into the unwinder 111, and the coupling between the electrode sheet ES of the loaded first electrode roll ER1 and the electrode sheet ES on the rewinder 113 side.

[0095] According to an exemplary embodiment, in the second step, the coordinate data can be calibrated based on reference point sensing data DSD and reference point data DPD, which sense the actual reference points of the actual electrode sheet ES. Based on the calibrated accurate coordinate data, defective parts of the electrode sheet ES, for example, can be removed. Therefore, when discarding defects in the second step or subsequent steps, it is possible to prevent some of the defective parts from being discarded, or excessive discarding of normal parts of the electrode sheet ES. This can improve the productivity and yield of the electrode sheet ES.

[0096] The process PLC 143 can be configured to control the operation of the unwinder 111, rewinder 113, scrap port 117, and processing mechanism 119. The process PLC 143 can be configured to generate signals for the operation and interruption of the unwinder 111, rewinder 113, scrap port 117, and processing mechanism 119. The signals for the operation and interruption of the unwinder 111, rewinder 113, scrap port 117, and processing mechanism 119 can be generated based on a body containing product ID and manufacturing recipe details.

[0097] The process PLC 143 can receive NG detection data NSD from the roll map PLC 141. The process PLC 143 can 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 the NG detection data NSD and coordinate data of the defective portion based on the calibrated coordinate values. Here, the coordinate data of the defective portion can be generated by the roll map PLC 141 or the process PLC 143 based on reference point data DPD, sensed reference point data DSD, and inverted coordinate value data, as described above.

[0098] When a defect on the electrode sheet ES, identified by either the coordinate data of the defective portion obtained based on the calibrated coordinate data or the NG detection data NSD, approaches the splicing table 115, the process PLC 143 may slow down the movement speed of the electrode sheet ES or interrupt the winding and unwinding of the unwinder 111 and rewinder 113.

[0099] After cutting the defective starting position (or a position adjacent to the defective starting position, taking process margins into account) on the splicing table 115, the scrap port 117 can be configured to wind up the defective portion DES of the electrode sheet ES, as shown by the thick dashed line. After the defective portion DES of the electrode sheet ES has been sufficiently wound up by the scrap port 117, the electrode sheet ES connected to the scrap port 117 and the electrode sheet ES connected to the unwinder 111 can be separated. Subsequently, the portion of the electrode sheet ES connected to the unwinder 111 and the portion connected to the electrode sheet ES connected to the rewinder 113 can be spliced ​​together to continue the current process. The portion of the electrode sheet ES connected to the unwinder 111 and the portion connected to the rewinder 113 can be spliced ​​together on the splicing table 115.

[0100] The processing mechanism 119 may be located downstream of the splicing table 115 in the flow of electrode sheet ES. That is, the processing mechanism 119 can be configured to process electrode sheet ES from which defective portions DES are discarded by processing on the splicing table 115.

[0101] As an example, the processing mechanism 119 may include a coater, which can coat the electrode sheet ES with electrode slurry. As another example, the processing mechanism 119 may include a pressure roll, which can perform a roll pressing process on the electrode sheet ES to which the electrode slurry is coated. As yet another example, the processing mechanism may include a slitting knife, which can separate the electrode sheet ES into multiple electrode sheets.

[0102] The battery manufacturing system 100 may further include a measuring instrument and an inspection instrument. The measuring instrument may be configured to measure the electrode sheet ES in order to collect measurement data of the electrode sheet ES. The measuring instrument may measure the electrode sheet ES in a scanning manner. The measurement data may include multiple numerically expressed measurement values. For example, the 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, width of the insulating material provided on the coating material, and overlap width between the coating material and the insulating material, and mismatch data between the ground lane on the upper surface of the electrode sheet ES and the ground lane on the lower surface of the electrode sheet ES. Here, the loading amount represents the amount of coating material loaded per unit area of ​​the electrode sheet ES and may be the area density of the coating material.

[0103] The measurement data is processed according to a set method to determine whether the measured portion of the electrode sheet ES is good or bad. The corresponding portion of the electrode sheet ES can be determined to be good if the measured amount of coating material on the electrode sheet ES (e.g., the loading amount on the electrode sheet ES or the thickness of the electrode sheet ES) is within a set range including upper and lower limits. The corresponding portion of the electrode sheet ES can be determined to be bad if the measured amount of coating material on the electrode sheet ES (e.g., the loading amount on the electrode sheet ES or the thickness of the electrode sheet ES) is less than the lower limit or greater than the upper limit.

[0104] The measuring instrument may include, for example, a TDI (Time Delay and Integration) camera, a CMOS (Complementary Metal Oxide Semiconductor) image sensor, and a TOF (Time of Flight) sensor. The measuring instrument may also include an emitter and receiver configured to perform measurements using non-destructive signals such as ultrasound, microwaves, terahertz waves, and infrared light. The measuring instrument may also include analog and / or digital sensors such as biosensors, chemical sensors, composition sensors, current and / or power meters, air quality sensors, gas sensors, Hall effect sensors, brightness level sensors, and light sensors. The measuring instrument may also include pressure sensors, temperature sensors, ultrasonic sensors, proximity sensors, door condition sensors, motion tracking sensors, humidity sensors, visible light and infrared sensors, and cameras.

[0105] The measuring instrument can be configured to generate coordinate-related measurement data by associating additional coordinate data based on the consumption signal WAS with the measurement data. To generate coordinate-related measurement data, the additional coordinate data can be calibrated based on the instrument's offset length.

[0106] The measuring instrument can be configured to collect evaluation data based on the measurement data. The evaluation data can be collected based on a comparison of the measured values ​​in multiple sections within the electrode sheet ES with a set range.

[0107] For example, a measurement (or average of measurements) within the first range can be determined to be normal; a measurement (or average of measurements) within the second range, which is larger than the first range, can be determined to be excessive; a measurement (or average of measurements) within the third range, which is even larger than the second range, can be determined to be very excessive; a measurement (or average of measurements) within the fourth range, which is even smaller than the first range, can be determined to be deficient; and a measurement (or average of measurements) within the fifth range, which is even smaller than the fourth range, can be determined to be very deficient.

[0108] Here, if the lower limit of the second range is greater than or equal to the upper limit of the first range, then the second range is greater than the first range. Similarly, if the upper limit of the fourth range is less than or equal to the lower limit of the first range, then the fourth range is less than the first range.

[0109] The evaluation values ​​in the above evaluation data can be associated with coordinate values. For example, each evaluation value can be matched with the start and end coordinate values ​​of the portion of the electrode sheet ES from which the evaluation value is calculated.

[0110] The inspection device can be configured to inspect the electrode sheet ES in order to collect inspection data of the electrode sheet ES. The inspection device can be configured to detect defects such as surface defects of the electrode sheet ES based on changes in color and reflectivity on the surface of the electrode sheet ES. The inspection device can be configured to collect inspection data for the portion corresponding to (e.g., overlapping) the sensing unit.

[0111] The inspection data collected by the inspection device may include quality judgments and process events related to parts of the electrode sheet ES. For example, the inspection data may include visual data of the electrode sheet ES collected by an image-based inspection device such as a vision machine, data on breaks and seams of the electrode sheet ES, data on parts of the electrode sheet ES that are sampled, data on parts of the electrode sheet ES that are scheduled to be scrapped, data on parts of the electrode sheet ES that will be scrapped, data on the quality of the coating 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, fold defects, wrinkle defects, puncture defects, and indentation defects. Reference points may be formed at predetermined intervals on the electrode sheet ES, and the location of other elements on the electrode sheet ES may be known based on the reference points. The inspection device may be any one of a color sensor, a seam sensor, a reference point sensor, and a vision machine.

[0112] The inspection device can be configured to generate coordinate-related inspection data by associating additional coordinate data based on the consumption signal WAS with the inspection data. To generate coordinate-related inspection data, the additional coordinate data can be calibrated based on the offset length of the inspection device.

[0113] The measurement and inspection data described above may be time-series data. Measurement and inspection data can be temporally ordered. Temporal ordering is a key characteristic of time-series data, where events are organized in the order in which they occur and arrive for processing. That is, measurement and inspection data can be stored based on the time at which the measurement and inspection are performed, and measurement and inspection data can be associated with time. This allows each measurement value in the measurement data to be time-matched, and each inspection value in the inspection data to be time-matched.

[0114] As an example, measurement data (e.g., loading amount on electrode sheet ES or thickness of electrode sheet ES) may have a series of measurement values ​​and time values ​​associated with the series of measurement values. The measurement values ​​and time values ​​may, but are not limited to, be matched one-to-one. As another example, defect data may have values ​​indicating a defect and time values ​​associated with the values ​​indicating a defect. Here, indicating a defect means including information about at least one of the following: the presence or absence of a defect and the type of defect.

[0115] A roll map can include coordinate-related measurement data and coordinate-related inspection data, which are generated by associating time-series measurement and inspection data with coordinate data. This allows the roll map to provide traceability to preceding processes while subsequent processes are being carried out or after the product has been shipped.

[0116] The rollmap PLC 141 may be in operative communication with the first rotary encoder 121, the second rotary encoder 125, the NG sensor 131, the reference point sensor 133, additional measuring instruments, and additional testers via a wired or wireless data network. The data network may include unidirectional or bidirectional communication. The data network may be embodied by a public network and / or specialized network using a physical channel, WiFi, Bluetooth®, and / or other frequency bands. The first rotary encoder 121, the second rotary encoder 125, the NG sensor 131, the reference point sensor 133, additional measuring instruments, and additional testers may be configured to collect data from equipment, workpieces, semi-finished products, and finished products within the battery manufacturing system 100, or to generate signals for data collection.

[0117] Coordinate-related measurement data and coordinate-related inspection data transmitted from the roll map PLC 141 to the process PLC 143 can be transmitted to the server 150 via the process PLC 143 and EIF 145. The process PLC 143 and EIF 145 can relay data communication between the server 150 and the roll map PLC 141. However, it is not limited to this, and the roll map PLC 141 can also directly transmit coordinate data, coordinate-related measurement data, and coordinate-related inspection data to the server 150.

[0118] To control the process, a communication line can be installed between the process PLC 143 and the server 150 via the EIF 145. This allows for data transmission via the process PLC 143 to save resources required for installing the communication line compared to when the first rotary encoder 121, the second rotary encoder 125, and measuring instruments communicate directly with the server 150, compared to when the roll map PLC 141 communicates directly with the server 150, thereby streamlining data processing and management.

[0119] EIF145 may be a device for communication between the manufacturing equipment's process PLC143 and the server 150, which is a higher-level server.

[0120] Server 150 can be configured to generate and store roll maps. Roll maps can be generated on a lot basis. Roll maps can include data regarding lot specifications. Lot specifications may include, for example, lot number, length of the electrode sheet ES to be wound, width of the electrode sheet ES, and the material and composition used for processing the electrode sheet ES.

[0121] Server 150 can be configured to store a first roll map of the first electrode roll ER1, transmit the coordinate data CD1 and reference point data DPD of the first roll map to process PLC 143, and generate and store a second roll map of the second electrode roll ER2 based on coordinate-related measurement data and coordinate-related inspection data. Furthermore, the coordinate data CD2 of the second roll map can be corrected based on the offset, which is the difference between the reference point sensing data DSD transmitted from roll map PLC 141 or process PLC 143 and the inverted coordinate values ​​of the reference point data DPD. Additionally, a second roll map of the second electrode roll can be generated based on the reference point sensing data DSD and the acquired coordinate data CD2 of the second electrode roll, or the coordinate data CD2 of the second roll map can be corrected.

[0122] According to an exemplary embodiment, the server 150 may be a data processing system that supports various activities necessary to manage battery manufacturing, such as work schedule management, work instructions, quality control, and work performance aggregation. The server 150 may be, for example, a Manufacturing Execution System (MES). The server 150 may be configured to input, process, output, and communicate data necessary for electrode manufacturing, such as coating processes, pressing processes, and manufacturing processes.

[0123] According to another exemplary embodiment, the server 150 may be configured to store and process raw measurement data. The server 150 can manage the quality of electrode sheet ES processing by continuously monitoring the processing of electrode sheet ES based on the measurement data. According to an exemplary embodiment, the server 150 may be a Statistical Process Controller (SPC). The server 150 can identify problem conditions in a timely manner and provide alarms to operators before potential problems occur by collecting and analyzing manufacturing data in substantially real time.

[0124] According to other exemplary embodiments, the server 150 may be, for example, a data warehouse that can store NG detection data (NSD), coordinate data, coordinate-related measurement data, and coordinate-related inspection data for a long period of time based on the product quality assurance period, etc.

[0125] According to other exemplary embodiments, the server 150 may also be provided separately from the MES, SPC, and data warehouse for creating role maps.

[0126] The role map PLC141, process PLC143, EIF145, and server 150 can be embodied in hardware, firmware, software, or a combination thereof. For example, the role map PLC141, process PLC143, EIF145, and server 150 can include computing devices such as workstation computers, desktop computers, laptop computers, and tablet computers. The role map PLC141, process PLC143, EIF145, and server 150 can also include any one of the following: a simple controller, a complex processor such as a microprocessor, a CPU, or a GPU, a processor composed of software, dedicated hardware, and firmware. The role map PLC141, process PLC143, EIF145, and server 150 can also be embodied in, for example, a general-purpose computer or application-specific hardware such as a DSP (Digital Signal Process), FPGA (Field Programmable Gate Array), and ASIC (Application Specific Integrated Circuit).

[0127] Server 150 may include a physical server or a cloud server. Server 150 can provide data and analysis results to workers through various frameworks. The framework may include protocols that support data transmission so that the display device 160 can provide visualizations that visualize data via a user interface and are updated when new data is calculated by Server 150. The protocols that support the above data transmission may use HTML, JavaScript, and / or JSON. Server 150 can transmit visualization commands VC to the display device 160, and the display device 160 can visualize the role map and display the visualized role map.

[0128] Server 150 can include a variety of APIs (Application Programming Interfaces) for storing data in databases and other data management tools. These APIs can also be used to retrieve data in the databases of various data management systems. The data management systems can be configured to provide access to the database, pull data from the database, retrieve data, and generate metrics. Here, metrics are tools for visualizing data. Metrics include time-series generated measurements and can be used for application monitoring and generating status alerts.

[0129] The battery manufacturing system 100 can embody a plug-in architecture with an API for data acquisition to provide plug-and-play connectivity for NG sensors 131, reference point sensors 133, additional measuring instruments, and additional inspection instruments. This allows resources at specific process steps and sites to be easily transferred to other processes and sites, or new resources to be easily introduced at each process step and site.

[0130] The data network between elements of the battery manufacturing system 100 can include various types of communication channels, including unidirectional, bidirectional wired, and wireless communication. Examples of data networks include industrial protocol networks such as OPC, Modbus, and ProfiNet. The communication channel may be a dedicated conduit communication such as USB (Universal Serial Bus), IEEE 802 (Ethernet), IEEE 1394 (FireWire), or other high-speed data communication standards.

[0131] In some embodiments, the battery manufacturing system 100 may further include a manual input system that allows an operator to input manufacturing data. The battery manufacturing system 100 may also allow operator data input using input tools and computer-based input of manufacturing data, such as Excel file scraping.

[0132] According to some embodiments, the operation of the roll map PLC 141, process PLC 143, EIF 145, and server 150 can be embodied as instructions stored on a machine-readable medium that can be read and executed by one or more processors. Here, the machine-readable medium can include any mechanism for storing and / or transmitting information in a form readable by a machine (e.g., a computing device). For example, the machine-readable medium can include ROM (Read Only Memory), RAM (Random Access Memory), magnetic disk storage medium, optical storage medium, flash memory, electrical, optical, acoustic or other forms of radio signals (e.g., carrier waves, infrared signals, digital signals, etc.) and any other signals.

[0133] The rollmap PLC141 can be embodied by software configured to collect, for example, coordinate data, NG detection data NSD, and reference point detection data DSD, and to transmit the NG detection data NSD and reference point detection data DSD.

[0134] The process PLC 143 can be embodied by software configured to receive product ID, product recipe, defective data DD, reference point data DPD, NG detection data NSD, and reference point detection data DSD, transmit NG detection data NSD and reference point detection data DSD, and generate control signals to control the unwinder 111, rewinder 113, scrap port 117, and processing mechanism 119 based on the product ID, product recipe, defective data DD, reference point data DPD, NG detection data NSD, and reference point detection data DSD. More specifically, the process PLC 143 can be embodied by software configured to calculate the reference point offset based on the reference point data DPD and reference point detection data DSD, calibrate the coordinate data CD1 based on the offset, and generate control signals to control the unwinder 111, rewinder 113, scrap port 117, and processing mechanism 119 based on the calibrated coordinate data.

[0135] The EIF145 can be embodied by software for relaying data and information transmission between the process PLC143 and the server150. More specifically, the EIF145 can be embodied by software configured to perform flow control, error control, synchronization, sequence control, addressing, multiplexing, routing, and format conversion of communications between the process PLC143 and the server150.

[0136] The server 150 can be embodied by software configured to transmit, for example, product ID, product recipe, coordinate data CD1, and reference point data DPD to the process PLC 143, and to generate a roll map based on coordinate-related measurement data and coordinate-related inspection data.

[0137] However, this is for illustrative purposes only, and the operation of the rollmap PLC141, process PLC143, EIF145, and server 150 may be triggered by other devices that execute computing devices, distributed computing devices, processors, firmware, software, routines, and instructions, etc.

[0138] The architecture of system 100, configured to generate a roll map, can be realized by adding only a roll map PLC 141 to the process PLC 143, EIF 145, and server 150, which are essential elements of a modern process control system. The system according to the exemplary embodiment can leverage resources already installed in the manufacturing site and save additional capital expenditures. Furthermore, by applying the same architecture as existing manufacturing facilities to newly constructed manufacturing facilities, it is possible to streamline battery manufacturing reliability, problematic process detection / improvement, and the introduction of new processes.

[0139] (Second Embodiment) Figure 2 shows a flowchart illustrating a method for manufacturing a battery according to an exemplary embodiment.

[0140] Referring to Figures 1 and 2, at P110, the coordinate data CD1 and the reference point data DPD of the first electrode roll ER1 can be loaded. The process PLC143 or roll map PLC141 can receive the coordinate data CD1 and the reference point data DPD of the first electrode roll ER1 from the server 150.

[0141] Next, at P120, the reference point of the electrode sheet ES can be sensed to collect reference point sensing data DSD. The reference point sensing data DSD can be collected by the reference point sensor 133 and the roll map PLC 141 as described above.

[0142] Next, at P130, the coordinate data CD1 can be calibrated based on the reference point sensing data DSD and the reference point data DPD. The calibration of the coordinate data CD1 can be triggered by the sensing of a reference point. The calibration of the coordinate data CD1 may include calculating an offset, which is the difference between the sensed reference point coordinate value in the reference point sensing data DSD and the inverted reference point coordinate value in the reference point data DPD, and calibrating the inverted coordinate value of the stored coordinate value in the coordinate data CD1 based on the above offset.

[0143] Next, in P140, defective portions DES of the electrode sheet ES can be discarded based on the calibrated coordinate data. To discard the defective portions DES of the electrode sheet ES, process PLC143 can be configured to generate signals to control the operation of the unwinder 111, rewinder 113, scrap port 117, and processing mechanism 119.

[0144] (Third embodiment) Figure 3 shows a system 100 for manufacturing a battery according to an exemplary embodiment.

[0145] Referring to Figure 3, the battery manufacturing system 100 may include an unwinder 111, a rewinder 113, a splicing table 115, a scrap port 117, a processing mechanism 119, a first rotary encoder 121, a second rotary encoder 125, an NG sensor 131, a reference point sensor 133, an integrated PLC 140, an EIF (Equipment Interface) 145, a server 150, and a display device 160.

[0146] The unwinder 111, rewinder 113, splicing table 115, scrap port 117, processing mechanism 119, first rotary encoder 121, second rotary encoder 125, NG sensor 131, reference point sensor 133, EIF (Equipment Interface) 145, server 150, and display device 160 are substantially the same as those described with reference to Figure 1, so redundant descriptions of them are omitted.

[0147] The integrated PLC140 can be configured to perform the functions of the roll map PLC141 and process PLC143 in Figure 1. This allows the integrated PLC140 to generate coordinate data based on either the input amount signal UWAS or the consumption amount signal WAS, collect NG sensing data NSD (see Figure 1) and reference point sensing data DSD (see Figure 1), and receive coordinate data CD1 and reference point data DPD from the server 150 via EIF145. The integrated PLC140 can be configured to calibrate the inverted coordinate values ​​of the coordinate data CD1 based on the inverted data of the reference point sensing data DSD and reference point data DPD. The integrated PLC140 can be configured to generate signals for controlling the unwinder 111, rewinder 113, scrap port 117, and processing mechanism 119 based on the calibrated coordinate data.

[0148] The present invention has been described in more detail above with reference to the drawings and embodiments. However, the configurations described in the drawings or embodiments described herein are merely one embodiment of the present invention and do not represent the entire technical concept of the present invention. Therefore, there may be various equivalents and modifications that can be substituted for them at the time of filing. [Explanation of symbols]

[0149] 100: Battery manufacturing system 111: Unwinder 113: Rewinder 115: Splicing Table 117: Scrapport 119: Processing mechanism 121, 125: Rotary encoder 131: NG sensor 133: Reference point sensor 140, 141, 143:PLC(Programmable Logic Controller) 145: EIF (Equipment Interface) 150: Server 160:Display device

Claims

1. In a battery manufacturing system in which an electrode sheet is unwound from a first electrode roll and the electrode sheet is wound onto a second electrode roll, A server configured to store coordinate data of the first electrode roll and reference point data representing the reference point of the first electrode roll, A PLC (Programmable Logic Controller) configured to load coordinate data and reference point data of the first electrode roll from the server, Includes a reference point sensor configured to sense a reference point of the electrode sheet unwound from the first electrode roll and generate a reference point sensing signal, A battery manufacturing system in which the PLC is configured to acquire coordinate data of the second electrode roll by calibrating the inverted coordinate values ​​of the stored coordinate values ​​included in the coordinate data of the first electrode roll based on the inverted coordinate values ​​of the stored reference point coordinate values ​​included in the reference point data and the coordinate values ​​of the sensed reference point.

2. By inverting the aforementioned coordinate values, The starting coordinate value of the coordinate data of the first electrode roll is calibrated to the ending coordinate of the coordinate data of the second electrode roll. The battery manufacturing system according to claim 1, wherein the end coordinate value of the coordinate data of the first electrode roll is calibrated to the start coordinate of the coordinate data of the second electrode roll.

3. The battery manufacturing system according to claim 1 or 2, wherein the inversion of the stored reference point coordinate values ​​and the inversion of the stored coordinate values ​​included in the coordinate data are performed by the server or the PLC.

4. The battery manufacturing system according to claim 1 or 2, wherein the PLC calculates an offset between the inverted coordinate values ​​of the stored reference point coordinate values ​​and the sensed reference point coordinate values, and calibrates the inverted coordinate values ​​of the stored coordinate values ​​of the first electrode roll which are inverted based on the offset.

5. The battery manufacturing system according to claim 1 or 2, wherein the PLC calibrates the sensed reference point coordinate value based on an offset length, which is the length of the electrode sheet interposed between the unwinder from which the first electrode roll is unwound and the electrode sheet portion at the time the reference point is sensed.

6. The battery manufacturing system according to claim 1 or 2, wherein the server stores a first roll map including the coordinate data and reference point data of the first electrode roll.

7. The battery manufacturing system according to claim 1 or 2, wherein the server generates a second roll map of the second electrode roll based on reference point sensing data and the coordinate data of the second electrode roll acquired, or corrects the coordinate data of the generated second roll map.

8. In a battery manufacturing method in which an electrode sheet is unwound from a first electrode roll and the electrode sheet is wound onto a second electrode roll, A step of loading coordinate data including the stored coordinate values ​​of the first electrode roll and reference point data including the stored reference point coordinate values ​​of the first electrode roll, The steps include: sensing a reference point of the electrode sheet unwound from the first electrode roll and collecting reference point sensing data including the coordinate values ​​of the sensed reference point; A battery manufacturing method comprising the step of obtaining coordinate data of the second electrode roll by calibrating the inverted coordinate value of the stored coordinate value of the first electrode roll based on the inverted coordinate value of the stored reference point coordinate value and the coordinate value of the sensed reference point.

9. The battery manufacturing method according to claim 8, further comprising the step of discarding defective portions of the electrode sheet unwound from the first electrode roll based on the calibrated coordinate values.

10. By inverting the aforementioned coordinate values, The starting coordinate value of the coordinate data of the first electrode roll is calibrated to the ending coordinate of the coordinate data of the second electrode roll. The battery manufacturing method according to claim 8 or 9, wherein the end coordinate value of the coordinate data of the first electrode roll is calibrated to the start coordinate of the coordinate data of the second electrode roll.

11. The offset between the inverted coordinate value of the stored reference point coordinate value and the sensed reference point coordinate value is calculated. The battery manufacturing method according to claim 10, wherein the inverted coordinate values ​​of the stored coordinate values ​​of the first electrode roll are calibrated based on the offset.

12. The battery manufacturing method according to claim 8 or 9, wherein the sensed reference point coordinate value is calibrated based on an offset length which is the length of the electrode sheet interposed between the unwinder from which the first electrode roll is unwound and the electrode sheet portion at the time the reference point is sensed.

13. The battery manufacturing method according to claim 8 or 9, wherein the coordinate data of the first electrode roll and the reference point data are loaded based on a first roll map of the first electrode roll including the coordinate data and the reference point data.

14. A battery manufacturing method according to claim 13, comprising generating a second roll map of the second electrode roll based on the reference point sensing data and the acquired coordinate data of the second electrode roll, or correcting the coordinate data of the generated second roll map.

15. A second electrode roll is formed by winding up an electrode sheet having a plurality of first reference points along its longitudinal direction, which is unwound from a first electrode roll, and winding up the electrode sheet again. The electrode sheet of the second electrode roll is provided with a plurality of second reference points corresponding to the plurality of first reference points, A second electrode roll configured such that each second reference point is positioned at the longitudinal position of the inverted electrode sheet relative to each first reference point, or at a position offset from the longitudinal position of the inverted electrode sheet.

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