Reference point marking device and roll map generating device

Abstract

The present invention relates to a reference point marking device for a pattern electrode in which coated portions and non-coated portions are repeatedly arranged along a longitudinal direction, the pattern electrode having a plurality of electrode lane predetermined portions that are formed into a plurality of electrode lanes by being slit along a longitudinal direction in a subsequent process, the device including: a movable marking machine that moves along a width direction of the pattern electrode to mark reference points on non-coated portions of each of the electrode lane predetermined portions arranged along the width direction; and a control unit that controls an operation of the movable marking machine. The present invention also provides a roll map generating device using the above-mentioned reference point marking device.

Description

[Technical field]

[0001] The present invention relates to a reference point marking device capable of efficiently marking reference points on a pattern electrode in which coated portions and uncoated portions are repeatedly arranged along the longitudinal direction.

[0002] The present invention also relates to a roll map generating device using such a reference point marking device.

[0003] This application claims the benefit of priority based on Korean Patent Application No. 10-2022-0108292 dated August 29, 2022, and all contents disclosed in the documents of said Korean patent application are incorporated herein by reference. [Background technology]

[0004] The demand for secondary batteries is also increasing rapidly due to technological development and increasing demand for mobile devices. Among them, lithium secondary batteries are widely used as an energy source for various electronic products as well as various mobile devices due to their high energy density, operating voltage, and excellent storage and life characteristics.

[0005] The so-called electrode process for manufacturing electrodes for lithium secondary batteries consists of a coating process in which an active material and a predetermined insulating material are applied to the surface of a metal electrode plate, which serves as a current collector, to form a positive electrode and a negative electrode, a roll press process in which the coated electrodes are rolled, and a slitting process in which the rolled electrodes are cut to size.

[0006] The electrodes manufactured in the electrode process are processed to form electrode tabs through a notching process, and a separator is interposed between the positive and negative electrodes to form an electrode assembly, which is then stacked, folded or rolled up, packaged in a pouch or can, and filled with electrolyte to form a secondary battery. The assembled secondary battery is then charged and discharged, and undergoes an activation process to impart battery characteristics, resulting in a final finished secondary battery.

[0007] In the above electrode process, if an electrode breaks or becomes defective, the broken or defective portion may be removed and the electrode may be connected with a connecting tape. Alternatively, in order to maintain the electrode quality, the electrode start or end portion with uneven electrode quality may be removed. In this case, the worker arbitrarily inputs the length of the electrode cut out after electrode removal and connection (amount of electrode loss) into the control unit or the like. However, since the worker manually measures and inputs the amount of electrode loss, the amount of electrode loss that has actually been consumed is not accurate. In addition, the amount of electrode loss input by each worker differs.

[0008] In this case, the connecting tape is sensed in the subsequent process to know that the electrodes have been broken and connected, but the amount of electrode loss cannot be accurately grasped because it depends on the input of the operator. If the extracted amount of electrode loss is not accurate, the position coordinates of the electrode will change in the subsequent process, making it impossible to accurately process the subsequent process at the desired position. In addition, when comparing and analyzing quality changes between each detailed process of the electrode process, standards differ depending on the amount of electrode loss, making it impossible to reliably compare quality according to the position of the electrode.

[0009] In recent years, roll maps have been used that display data on quality or defects on a roll map bar that is displayed on a screen by copying an electrode in a roll-to-roll state. This roll map is created for each electrode detail process, i.e., the coating process, roll press process, and slitting process. The roll map information is downloaded to check information on quality defects and electrode breakage in the previous process, and the information is checked in the subsequent process to remove defects and perform necessary subsequent processing. However, if the amount of electrode loss is not accurately grasped as described above, the electrode position data displayed on the roll map will change, making it impossible to accurately display data on quality and defect positions, and there is a risk that the subsequent process will be performed based on incorrect position coordinates when the roll map is referred to in the subsequent process.

[0010] FIG. 1 is a schematic diagram showing that when loss occurs in an electrode, distortion occurs in the longitudinal coordinate of the electrode depending on the presence or absence of a reference point.

[0011] The top view of Figure 1 is a roll map (RM) that replicates the movement of the electrode that moves in a roll-to-roll state between the unwinder UW and the rewinder RW. On the actual roll map RM, many detailed data related to quality and defects are visually displayed together, but for the sake of convenience, Figure 1 only shows the electrode breakage and the connecting tape T.

[0012] The roll map RM in the upper drawing of Figure 1 is a replica of an actual electrode, and various types of breaks occur in actual electrodes. When one of the detailed processes of the electrode process is carried out, an electrode break occurs in that process (own process), and it is displayed on the roll map RM that a break of 50 meters and 60 meters has occurred. It also displays that 30 meters of the electrode start end was removed in the process before entering the process, and 35 meters of the electrode end was removed in the own process.

[0013] In this case, when the broken parts and the electrode removal parts (electrode loss parts) at the beginning and end of the electrode are removed, only the connecting tape T connecting the broken parts remains as shown in the drawing of the middle part of Figure 1. That is, the drawing of the middle part of Figure 1 is the actual shape of the electrode. In this drawing of the middle part, the position of the connecting tape T can be detected by, for example, a joint detection sensor. However, since the broken electrodes and removed electrodes do not remain on the actual electrode, the amount of electrode loss, which is the length of the electrode removal parts (loss parts), cannot be grasped. As described above, the electrode removal parts are manually input by the operator, so the accurate amount of electrode loss cannot be known.

[0014] Furthermore, if the amount of electrode loss cannot be grasped, the roll map RM of the electrode process will have the same form as the diagram in the middle of Figure 1, and the position coordinates on the roll map will also be distorted. The diagram at the top of Figure 1 is shown for convenience together with the connecting tape on the assumption that the electrode breakage / removal length is known, and when actual electrode loss occurs, it will take the form of the diagram in the middle of Figure 1.

[0015] The lower drawing in FIG. 1 shows that a reference point is introduced to prevent distortion of the coordinates of the roll map RM.

[0016] In the roll map RM at the bottom of FIG. 1, reference points M1, M2, and M3 are introduced at a predetermined interval to display the electrode loss portion. The number and intervals of the reference points M1, M2, and M3 can be applied differently depending on the length and specifications of the electrode. In FIG. 1, an electrode with a length of 1200 meters is assumed, and reference points M1, M2, and M3 are displayed at 300, 600, and 900 meters, respectively. If the above-mentioned reference points M1, M2, and M3 are marked on an actual electrode and the above reference points are actually measured when electrode loss occurs, the interval between the reference points will fluctuate, and the amount of electrode loss can be easily grasped based on the fluctuation value. In this way, when the amount of electrode loss is grasped, the reference points M1, M2, and M3 and the length of the electrode loss can be displayed together, as in the roll map RM at the bottom of FIG. 1. As a result, the longitudinal dimension (absolute coordinates) of the electrode in which the above loss length is reflected and the longitudinal dimension (relative coordinates) of the electrode in which the loss length is not reflected can be displayed together on one roll map.

[0017] In this way, by introducing reference points to the electrodes, the amount of electrode loss can be grasped by comparing the reference point position before the fluctuation in the reference point interval (the set reference point position) with the measured reference point position, and this can be reflected on the roll map.

[0018] In addition, the reference point serves as a standard for identifying and specifying individual batteries together with the cell ID given to each electrode in assembly processes such as electrode coating process, roll press and slitting process, notching, electrode winding and transport process, battery can insertion process, etc. Therefore, when a problem such as a defect occurs in a particular process, quality control can be easily performed by analyzing or tracing the cause based on the cell ID and the reference point.

[0019] FIG. 2 is a schematic diagram illustrating the labeling of reference points on the electrodes of a single electrode lane.

[0020] The arrows in the drawings indicate the direction in which the electrode travels. The electrode 1 has one coated portion 1b and non-coated portions 1a on both sides thereof. Therefore, it was sufficient for the conventional reference point marking machine 2 to mark the reference point M on the non-coated portion on one side of the electrode or on the non-coated portions 1a on both sides thereof.

[0021] However, such conventional marking devices are not suitable for marking reference points on so-called pattern electrodes.

[0022] FIG. 3 shows an example of a patterned electrode 10.

[0023] The pattern electrode 10 is an electrode in which coated portions 12 and non-coated portions 11' are repeatedly arranged along the longitudinal direction to form a pattern.

[0024] In a subsequent process, the pattern electrode 10 is slit in the width direction based on the non-coated portion 11' between the coated portions 12. One slit electrode coating portion 12 may be stacked with an electrode coating portion and a separator of the opposite polarity to form a stack cell type electrode assembly, or may be wound up together with an electrode coating portion and a separator of the opposite polarity to form a jelly roll type electrode assembly.

[0025] In particular, for pattern electrodes used for small batteries, a plurality of electrode lanes are first formed by slitting the non-coated portion 11' along the length of the pattern electrode before slitting the non-coated portion 11' in the width direction. Then, the non-coated portion 11' between the coated portions of each electrode lane is cut. In this case, the cut coated portions of each electrode lane can be stacked or wound to form an electrode assembly.

[0026] When the marking device of FIG. 2 is applied to a pattern electrode as shown in FIG. 3, the following problems arise.

[0027] First, in the slitting process after the manufacture of the pattern electrode, the non-coated portions (knurled portions; 11) on both sides of the width direction of the pattern electrode are removed. However, conventionally, as shown in Figure 2, reference points are marked on the non-coated portions 11 on both sides of the width direction of the pattern electrode, so the reference points are removed after the slitting process. This creates a gray zone between the slitting process and the winding process where quality control based on the reference points cannot be performed.

[0028] Secondly, the reference points of a large electrode are marked in units of length (e.g., meters (m)), and when the distance between the reference points varies due to a defect, coordinates are added in units of length to create a roll map or the roll map is corrected. However, since small electrodes such as pattern electrodes are small in size, they are managed in units of the number of patterns of the coating part along with such coordinates in units of length. That is, coordinates are added in units of the number of patterns along with meter information as the longitudinal coordinate of the electrode, and specific positions in the longitudinal direction can also be displayed in units of the number of patterns. The roll map of a pattern electrode can also be expressed in such units of the number of patterns. Therefore, the reference point marking mechanism for large electrodes needs to be modified to suit reference point marking for small electrodes.

[0029] Thirdly, when slitting a pattern electrode into multiple electrode lanes, multiple marking machines are required to mark reference points on each electrode lane (planned portion). However, as the number of marking machines increases, manufacturing costs rise and the installation process becomes more complicated. In addition, the number of optical components required for the marking machines increases, further increasing manufacturing costs. Furthermore, there is insufficient space to install multiple marking machines between the planned portions of the electrode lanes of small-sized pattern electrodes.

[0030] Therefore, it can be said that there is a demand for the development of a technique that can efficiently mark reference points on a pattern electrode. [Prior art documents] [Patent documents]

[0031] [Patent Document 1] Korean Patent No. 10-601567 Summary of the Invention [Problem to be solved by the invention]

[0032] An object of the present invention is to provide a reference point marking device capable of efficiently marking reference points on a pattern electrode in which coated portions and uncoated portions are repeatedly arranged along the longitudinal direction.

[0033] Another object of the present invention is to provide a roll map generating device that can effectively display reference point information and information regarding defects on a roll map using the above-mentioned reference point marking device. [Means for solving the problem]

[0034] To solve the above problems, the reference point marking device of the present invention is a reference point marking device for a pattern electrode in which coated portions and non-coated portions are repeatedly arranged along a longitudinal direction, the pattern electrode having a plurality of electrode lane predetermined portions that are formed into a plurality of electrode lanes by being slit along the longitudinal direction in a subsequent process, the reference point marking device including: a movable marking machine that moves along a width direction of the pattern electrode to mark reference points on the non-coated portions of each electrode lane predetermined portion arranged along the width direction; and a control unit that controls the operation of the movable marking machine.

[0035] The non-coated portion of each electrode lane predetermined portion may have a widthwise slitting portion that will be slit in the widthwise direction in a subsequent process, and the reference point may be marked on a portion of the non-coated portion that is not the widthwise slitting portion.

[0036] The moving marking machine may mark reference points as the pattern electrode moves along the longitudinal direction.

[0037] In this case, the marking path when the movable marking machine moves along the width direction and marks the non-coated portions of the plurality of electrode lane planned locations may be formed as a diagonal path that is inclined backward in the longitudinal direction depending on the longitudinal moving speed of the pattern electrode.

[0038] More specifically, the movable marking machine may mark reference points sequentially on the non-coated portion of each electrode lane planned portion at a position where the coated portion is pushed backward in the longitudinal direction, one pattern at a time.

[0039] Also, the movable marking machine may mark reference points on the non-coated portion of each electrode lane predetermined portion at intervals of a predetermined number of patterns of the coated portion along the longitudinal direction.

[0040] The pattern electrode may be a double-sided electrode having an upper surface and a lower surface coated with an electrode active material, and the moving marking devices may be installed on the upper surface and the lower surface of the pattern electrode, respectively.

[0041] The reference point marking device further includes a position measuring instrument that acquires, as coordinate data, a longitudinal position of the pattern electrode according to an amount of rotation of the unwinder or rewinder when the pattern electrode moves longitudinally between the unwinder and the rewinder in a roll-to-roll state, and can express the coordinate data as pattern number unit data of the coating section, and the control section can control the moving marking machine to mark reference points on the non-coated portions of each electrode lane planned portion at intervals of a predetermined pattern number of the coating section based on the pattern number unit data.

[0042] The marked reference points may include sequence information of each electrode lane planned site, and pattern number unit or pattern sequence information of the reference points along the longitudinal direction of the pattern electrode.

[0043] The reference point marking device may further include a defect marking device arranged in parallel with the moving marking device along the electrode width direction, for marking a defect on a non-coated portion provided along a longitudinal direction at one or both ends of the width direction of the pattern electrode.

[0044] In this case, a guide shaft may be arranged along the width direction on the pattern electrode, the movable marking device and the defect marking device may be coupled to the guide shaft, and the movable marking device may be installed so as to be movable along the guide shaft.

[0045] At least one defect inspection machine is disposed in front of the defect marking machine, which inspects the pattern electrode to obtain inspection data regarding defects and, in conjunction with the position measuring device, obtains coordinate data and pattern number unit data of the pattern electrode regarding the defective portion and / or defective section from which the inspection data is obtained, and the defect marking machine can mark defects on non-coated portions at one or both widthwise ends of the pattern electrode based on the coordinate data and pattern number unit data transmitted from the defect inspection machine.

[0046] The control unit can determine the time when the electrode portion of the defective portion and / or defective section arrives at the defective marking machine based on the distance between the defect inspection machine and the defective marking machine and the moving speed of the pattern electrode, and can control the defective marking to mark the defective portion and / or defective section at the time of arrival.

[0047] According to another aspect of the present invention, a roll map generating device includes a position measuring device that acquires a longitudinal position of a pattern electrode, in which coated portions and non-coated portions are repeatedly arranged along a longitudinal direction of the electrode, as coordinate data corresponding to an amount of rotation of the unwinder or rewinder when the pattern electrode moves in a roll-to-roll state between an unwinder and a rewinder, and can express the coordinate data as pattern number unit data of the coating portion, a marking machine that works in conjunction with the position measuring device to mark reference points at predetermined intervals on the pattern electrode along the longitudinal direction of the pattern electrode, and a marking device that works in conjunction with the position measuring device and the marking machine to obtain the coordinate data relating to the longitudinal position of the pattern electrode, the pattern number unit data of the coating portion, and the pattern number unit data relating to the reference point. and a roll map generating unit that acquires data and generates a roll map by displaying at least the pattern number unit data on a roll map replicating an electrode moving in a roll-to-roll state, the pattern electrode having a plurality of predetermined electrode lane portions formed with a plurality of electrode lanes by being slit along a longitudinal direction of the electrode in a subsequent process, the marking machine being a moving marking machine that moves along a width direction of the pattern electrode and marks reference points on non-coated portions of each of the predetermined electrode lane portions arranged along the width direction, and the roll map generating unit may generate a roll map of the pattern electrode and roll maps of individual predetermined electrode lane portions based on the pattern number unit data marked by the moving marking machine.

[0048] The roll map generating device further includes a defect marking machine arranged in parallel with the movable marking machine along the electrode width direction, which performs defect marking on an uncoated portion provided along a longitudinal direction at one end or both ends of the width direction of the pattern electrode, and at least one defect inspection machine is arranged in front of a position of the defect marking machine, which inspects the pattern electrode to obtain inspection data related to defects and can obtain coordinate data of the pattern electrode and pattern number unit data related to the defective portion and / or defective section from which the inspection data is obtained in conjunction with the position measuring device, and the defect marking machine performs defect marking on an uncoated portion at one end or both ends of the width direction of the pattern electrode based on the coordinate data and pattern number unit data transmitted from the defect inspection machine, and the roll map generating unit can display both the reference point and the defect marking on a roll map based on the coordinate data and the pattern number unit data. Effect of the Invention

[0049] According to the present invention, a moving marking machine that moves along the width direction of a pattern electrode can mark reference points corresponding to all of the predetermined locations of a plurality of electrode lanes.

[0050] Therefore, the number of marking machines for the reference point marking is greatly reduced, and the manufacturing cost can be greatly reduced.

[0051] Furthermore, according to the present invention, a roll map can be realized that replicates the pattern electrodes and the planned locations of each electrode lane based on the pattern number unit data of the reference points by the reference point marking device. The roll map can simultaneously display information on electrode defects in addition to the reference point information. Therefore, data on quality defects of the pattern electrodes can be visually and easily grasped at a glance by associating them with the reference points.

[0052] In addition, since the roll map on which the reference points are displayed can be referred to in each detailed process of the electrode process, processing in the subsequent processes, removal of defects, or quality tracking and management can be easily performed. [Brief description of the drawings]

[0053] [Figure 1] 11 is a schematic diagram showing how distortion occurs in the longitudinal coordinate of an electrode depending on the presence or absence of a reference point when loss occurs in the electrode. FIG. [Diagram 2] FIG. 13 is a schematic diagram showing the display of reference points on the electrodes of a single electrode lane. [Diagram 3] FIG. 2 is a schematic diagram showing an example of a pattern electrode. [Figure 4] 1 is a schematic diagram of a reference point marking device according to a first embodiment of the present invention. [Diagram 5] 2 is a schematic diagram showing an operation process of the mobile marking machine according to the first embodiment; FIG. [Figure 6] FIG. 2 is a schematic diagram showing reference points being marked according to the first embodiment; [Figure 7] FIG. 13 is a schematic diagram showing the battery assembly process after the pattern electrode is slit. [Figure 8] FIG. 11 is a schematic diagram of a reference point marking device according to a second embodiment of the present invention. [Figure 9] 6A to 6C are schematic diagrams illustrating an operation process of the marking machine according to the second embodiment. [Figure 10] FIG. 11 is a schematic diagram showing that reference points and defects are marked according to a second embodiment; [Figure 11] FIG. 2 is a schematic diagram of a role map generating apparatus according to another aspect of the present invention. [Figure 12] FIG. 2 is a schematic diagram of a data visualization device included in the role map generator. [Figure 13] 2 is a schematic diagram showing a roll map of a pattern electrode generated by the roll map generating device of the present invention. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0054] Hereinafter, detailed configurations of the present invention will be described in detail with reference to the attached drawings and various embodiments. The embodiments described below are illustratively shown to facilitate understanding of the present invention, and the attached drawings are not drawn to actual scale to facilitate understanding of the invention, and the dimensions of some components may be exaggerated.

[0055] Since the present invention can be modified in various ways and can have various forms, specific embodiments are illustrated in the drawings and described in detail in the text, but it is not intended to limit the present invention to the specific disclosed forms, and it should be understood that the present invention includes all modifications, equivalents, and alternatives falling within the spirit and technical scope of the present invention.

[0056] According to an embodiment of the present invention, there is provided a reference point marking device for a pattern electrode in which coated portions and non-coated portions are repeatedly arranged along a longitudinal direction, the pattern electrode having a plurality of electrode lane predetermined portions that are formed into a plurality of electrode lanes by being slit along a longitudinal direction in a subsequent process, the reference point marking device including: a movable marking machine that moves along a width direction of the pattern electrode to mark reference points on non-coated portions of each electrode lane predetermined portion arranged along the width direction; and a control unit that controls an operation of the movable marking machine.

[0057] According to another aspect of the present invention, a roll map generating device includes a position measuring device that acquires a longitudinal position of a pattern electrode, in which coated portions and non-coated portions are repeatedly arranged along a longitudinal direction of the electrode, as coordinate data corresponding to an amount of rotation of the unwinder or rewinder when the pattern electrode moves in a roll-to-roll state between an unwinder and a rewinder, and can express the coordinate data as pattern number unit data of the coating portion, a marking machine that works in conjunction with the position measuring device to mark reference points at predetermined intervals on the pattern electrode along the longitudinal direction of the pattern electrode, and a marking device that works in conjunction with the position measuring device and the marking machine to obtain the coordinate data relating to the longitudinal position of the pattern electrode, the pattern number unit data of the coating portion, and the pattern number unit data relating to the reference point. and a roll map generating unit that acquires data and generates a roll map by displaying at least the pattern number unit data on a roll map replicating an electrode moving in a roll-to-roll state, the pattern electrode having a plurality of predetermined electrode lane portions formed with a plurality of electrode lanes by being slit along a longitudinal direction of the electrode in a subsequent process, the marking machine being a moving marking machine that moves along a width direction of the pattern electrode and marks reference points on non-coated portions of each of the predetermined electrode lane portions arranged along the width direction, and the roll map generating unit may generate a roll map of the pattern electrode and roll maps of individual predetermined electrode lane portions based on the pattern number unit data marked by the moving marking machine.

[0058] <Reference point marking device> (First embodiment) FIG. 4 is a schematic diagram of a reference point marking device according to a first embodiment of the present invention, FIG. 5 is a schematic diagram showing the operating process of a mobile marking machine according to the first embodiment, FIG. 6 is a schematic diagram showing a reference point being marked according to the first embodiment, and FIG. 7 is a schematic diagram showing the battery assembly process after the pattern electrode is slit.

[0059] The reference point marking device 100 of the present invention is a reference point marking device 100 for a pattern electrode 10 in which coated portions 12 and non-coated portions 11' are repeatedly arranged along a longitudinal direction, and the pattern electrode 10 has a plurality of electrode lane scheduled portions that are formed into a plurality of electrode lanes by being slit along a longitudinal direction in a subsequent process, and includes a movable marking machine 20 that moves along a width direction Y of the pattern electrode 10 to mark reference points on the non-coated portions 11' of each electrode lane scheduled portion arranged along the width direction, and a control unit 40 that controls the operation of the movable marking machine 20.

[0060] In the present invention, the pattern electrode 10 to be the target of the reference point marking refers to an electrode in which the coated portions 12 and the non-coated portions 11' are repeatedly arranged as shown in FIG. 6. That is, it refers to an electrode in which the coating portions 12 are coated in a predetermined pattern along the longitudinal direction X of the electrode. The coating portions 12 are coated with an electrode active material. As shown in FIG. 4, when the electrode (current collector) advances in a roll-to-roll state between the unwinder UW and the rewinder RW, the electrode active material is intermittently discharged from the coater C onto the current collector, and a pattern electrode 10 in which the coated portions 12 and the non-coated portions 11' are repeatedly arranged is formed. The coated electrode passes through an electrode oven D, where the coating portions 12 are dried. The reference point marking device 100 of the present invention is disposed after the electrode oven D and can mark a predetermined reference point M on the pattern electrode 10.

[0061] 6, the pattern electrode 10 has a plurality of electrode lane pre-portions (L1, ..., L20) that are formed into a plurality of electrode lanes by slitting along the longitudinal direction X in a subsequent process (slitting process). The pattern electrode 10 shown in Fig. 6 has a total of 20 electrode lane pre-portions from L1 to L20. That is, a predetermined number (20 in this embodiment) of the electrode lane pre-portions are arranged along the width direction Y of the pattern electrode 10.

[0062] Each of the planned electrode lane portions to be marked with the reference point also has a structure in which coated portions 12 and non-coated portions 11' are repeatedly arranged along the longitudinal direction of the electrode. The reference point M is marked on the non-coated portion 11' between the coated portions 12 of each planned electrode lane portion. As described above, the reference point serves as reference information for quality control and tracking in the electrode process, assembly process, subsequent winding process, and the like. For this reason, it is necessary that the shape of the reference point of each planned electrode lane portion is maintained without being damaged even after the subsequent slitting process. Therefore, the above-mentioned reference point needs to be marked within the range of the upper limit line and the lower limit line in the width direction of the planned electrode lane portion (i.e., the boundary line S1 between the adjacent planned electrode lane portions). In other words, it is preferable that the reference point is not marked so as to straddle the boundary line S1 between the adjacent electrode lanes.

[0063] Furthermore, the non-coated portion 11' of each of the planned electrode lane regions is slit in the width direction in a subsequent process. Therefore, the non-coated portion 11' has a planned slitting region in the width direction (planned line: S2) that is slit in the width direction. If the reference point straddles the planned slitting region, the shape of the reference point M may be damaged by slitting in the width direction. Therefore, the reference point needs to be marked in a manner that avoids the planned slitting region in the width direction. In other words, the reference point is marked in a region of the non-coated portion 11' that is not a planned slitting region in the width direction (see FIG. 6).

[0064] As shown in FIG. 4 and FIG. 5, the movable marking machine 20 of the present invention marks a reference point on the non-coated portion 11' of each electrode lane planned portion while moving along the width direction of the pattern electrode 10. As a result, it is not necessary to install a separate marking machine along each electrode lane planned portion, and one movable marking machine 20 can mark the reference point on the non-coated portion 11' of a plurality of electrode lane planned portions. Alternatively, if necessary, a plurality of electrode lane planned portions may be divided into a predetermined number of groups of electrode lane planned portions, and one movable marking machine 20 may mark each of the groups. In this case, the number of movable marking machines 20 may be set up to the number of groups. In this case, it is not necessary to install a movable marking machine for each electrode lane planned portion, and the number of movable marking machines required may be reduced. The movable marking machine 20 may mark a reference point on the non-coated portion 11' of each electrode lane planned portion while moving from one side end to the other side end or from the other side end to one side end in the width direction. The movable marking machine 20 does not mark a reference point on the non-coated portion 11 at one or both ends in the width direction of the pattern electrode 10 as in the conventional method. Instead, a reference point is marked on the non-coated portion 11' between the coated portions 12 of each electrode lane planned portion. Therefore, even if the non-coated portion 11 at one or both ends of the pattern electrode 10 is removed by slitting, the reference point M remains and can be referred to when creating a roll map or performing quality control. In addition, even if each electrode lane planned portion is slit in the longitudinal direction, the reference point marked between the coated portions 12 of the electrode lane planned portion remains and can be referred to when creating a roll map in units of the number of patterns of the coating portion. In addition, even when the electrode lane planned portion is slit in the longitudinal direction to form a plurality of electrode lanes and then each electrode lane is slit again in the width direction, the reference point remains and therefore each battery cell can be managed based on the reference point even in the process of winding each coated portion 12 or inserting it into a battery can (B1, . . . Bn). Therefore, the present invention is suitable for managing the small pattern electrodes 10 in units of the number of patterns, or for displaying the small pattern electrodes in units of the number of patterns to create a roll map.

[0065] The movable marking machine 20 may be, for example, an inkjet type ink marking machine, a laser type laser marking machine, or a punching type marking machine, but is not limited thereto. A suitable marking machine may be selected and used as long as it has excellent visibility of the reference point M and does not damage the non-coated portion 11'. In the case of a laser type or punching type marking machine, care must be taken when marking the reference point M, as it may leave damage to the non-coated portion 11'.

[0066] 5, the movable marking device 20 according to an embodiment may be movably coupled to a guide shaft R installed on the pattern electrode 10 along the width direction. A known linear movement mechanism may be adopted as a movement mechanism of the movable marking device 20 along the guide shaft R. For example, the movable marking device 20 may include a linear motor capable of linear movement along the guide shaft R. In addition, the movable marking device 20 may include an LM guide mechanism having a bearing in a portion that is guided to reduce friction when moving along the guide shaft R. Since such a linear movement mechanism is known, a detailed description thereof will be omitted.

[0067] Also, the movable marking machine 20 includes a marking unit 23. When the movable marking machine 20 is an ink marking machine, the marking unit may be a nozzle unit connected to an ink supply unit (not shown).

[0068] The moving marking machine 20 may include a vision camera 21 or a recognition sensor so as to distinguish and recognize the coated portion 12 and the non-coated portion 11'. The vision camera 21 identifies the boundary between the coated portion 12 and the non-coated portion 11', and allows the marking unit 23 to mark a predetermined marking position of the non-coated portion 11'. As the recognition sensor, a recognition sensor capable of identifying the position of the non-coated portion by comparing the color or contrast of the coated portion and the non-coated portion may be used. For example, a color sensor or an optical sensor capable of identifying contrast may be used. The moving marking machine 20 may further include an illumination device 22 so that the vision camera 21 or the recognition sensor can easily distinguish the non-coated portion 11' and the coated portion 12. Optical components such as the vision camera and the illumination device are expensive. The present invention has an advantage that the number of expensive optical components can be significantly reduced since the reference points M can be marked at the intended positions of a plurality of electrode lanes by one or a small number of moving marking machines 20. The mobile marking machine 20 may determine the marking position using the vision camera or sensor, and mark a reference point at the determined marking position using encoder information.

[0069] Since the moving marking device 20 moves along the width direction Y, it is necessary to set the moving range thereof. For this purpose, a limit sensor (not shown) may be provided. The limit sensor and the control unit 40 are linked, and the control unit 40 may regulate the moving range of the moving marking device 20 according to the position detected by the limit sensor. If necessary, a stopper (not shown) may be provided to prevent the moving marking device 20 from colliding. Of course, other mechanical and / or electronic stopper mechanisms may be provided on the moving marking device 20 or on the guide shaft R connected to the moving marking device 20.

[0070] The control unit 40 controls the moving marking machine 20 to mark reference points M at predetermined positions and intervals in the longitudinal direction of the pattern electrode 10. In particular, as shown in Fig. 4, when the pattern electrode 10 moves along the longitudinal direction X, the control unit 40 can control the moving marking machine 20 to mark the reference points.

[0071] Since the moving marking machine 20 moves in the width direction, its moving operation, moving speed, etc. can be controlled by the control unit 40. When the control unit 40 is a PLC control unit that controls electrode transfer, it can control the moving speed of the pattern electrode 10 in the longitudinal direction, and the control unit 40 can determine the moving speed of the moving marking machine 20 in conjunction with the moving speed. That is, the control unit 40 can control the moving marking machine 20 so that the reference point is marked at a desired marking position, taking into consideration the moving speed of the pattern electrode 10, the moving speed of the moving marking machine, the reference point marking position, the marking interval, etc.

[0072] In order to grasp the longitudinal position and interval of the pattern electrode 10, the reference point marking device 100 of the present invention may include a position measuring device 30 capable of acquiring the longitudinal position of the pattern electrode 10 as coordinate data. The position measuring device 30 may acquire the longitudinal position of the pattern electrode 10 according to the rotation amount of the unwinder UW or the rewinder RW as coordinate data. For example, rotary encoders 30U and 30R that extract the position value of the pattern electrode 10 from the rotation amount of the motor that drives the unwinder UW or the rewinder RW may be used as the position measuring device. In FIG. 4, for convenience of explanation, the rotary encoder 30U of the unwinder UW and the rotary encoder 30R of the rewinder RW are shown to be disposed outside the unwinder UW and the rewinder RW, respectively, but the encoders 30U and 30R may be built into the unwinder UW and the rewinder RW, respectively.

[0073] The position measuring device 30 may measure and identify the longitudinal position coordinate of the pattern electrode 10 in meters (m). In the present invention, the position coordinate is identified in meters and also acquired in units of the number of patterns of the coating portion so as to be compatible with the pattern electrode 10 of a small battery. For example, if there are 1200 coating portion patterns in the length of the entire pattern electrode 10, the pattern electrode 10 may be defined as an electrode having a length with a total of 1200 patterns. In this case, the length of one coating portion may be defined as one unit (coordinate). If reference points are marked at points that are 25%, 50%, and 75% of the length of the pattern electrode 10, the reference points are marked on the non-coated portion at points where the number of coating portion patterns is 300th, 600th, and 900th when converted into a unit of the number of patterns. In this case, the interval between the reference points is 300 patterns in terms of the number of patterns. The length and width of the coating portion patterns may vary depending on the type of the pattern electrode 10. However, even if the length of the coating portion pattern changes, the length of each individual coating portion pattern remains the same, so the length of one pattern number can be treated as one coordinate unit to identify the longitudinal position of the pattern electrode 10. Also, based on such a pattern number unit, a roll map can be created as described below.

[0074] The position measuring device (rotary encoder) can count once for each motor rotation when the unwinder UW or rewinder RW rotates a length corresponding to one pattern number, thereby expressing the longitudinal position of the pattern electrode 10 in unit coordinates of the pattern number.

[0075] 4, the control unit 40 is connected to the position measuring device 30, and when the pattern electrode 10 moves along the longitudinal direction in a roll-to-roll state and the pattern electrode 10 arrives at a position of a predetermined pattern number based on the pattern number unit data, the control unit 40 provides a marking signal to the moving marking device 20. The marking signal is repeatedly issued at intervals of the set predetermined pattern number, and the moving marking device 20 controls the moving marking device 20 to mark reference points on the non-coating portion 11' of each electrode lane scheduled portion at intervals of the predetermined pattern number along the longitudinal direction of the pattern electrode 10.

[0076] 6 shows an example in which the movable marking machine 20 moves in the width direction while marking the non-coated portions 11' of a plurality of electrode lane locations as the pattern electrode 10 moves in the longitudinal direction. As the movable marking machine 20 moves, the pattern electrode 10 also moves in the longitudinal direction, so the marking path by the movable marking machine 20 describes a diagonal path that is inclined backward in the longitudinal direction depending on the moving speed of the pattern electrode 10 in the longitudinal direction.

[0077] Assuming that the pattern electrode 10 is arranged in the width direction from the first electrode lane scheduled portion L1 to the twentieth electrode lane scheduled portion L20, in the example of FIG. 6, reference points are sequentially marked on the non-coated portion 11' of each electrode lane scheduled portion at positions where the coating portion is pushed backward in the longitudinal direction by one pattern at a time from the second electrode lane. The distance pushed backward (number of patterns) is not limited to one pattern at a time. That is, the distance pushed backward (number of patterns) may vary depending on the total number of patterns of the pattern electrode 10, the length of each pattern, the moving speed of the pattern electrode 10, the moving speed of the moving marking device 20, etc. However, the interval (interval between the number of patterns) between the reference points marked on each electrode lane scheduled portion is the same.

[0078] While being relatively moved in the longitudinal rear direction one pattern at a time from the first electrode lane scheduled site L1 to the twentieth electrode lane scheduled site L20, the movable marking device 20 marks the first reference points (M1, M1', M1'' ...) for each electrode lane scheduled site in order, and then the movable marking device 20 returns to and moves upward along the width direction to the non-coated portion 11' of the first electrode lane scheduled site. When the pattern electrode 10 moves in the traveling direction X and is spaced from the first reference point M1 of the first electrode lane scheduled site by a predetermined number of patterns (for example, 300 patterns), the movable marking device 20 moves downward again in the width direction to draw a diagonal marking path at each electrode lane scheduled site. That is, the movable marking device 20 marks the second reference points (M2, M2', M2'' ...) at each electrode lane scheduled site while moving along the width direction. Thereafter, the movable marking device 20 returns in the upward width direction and repeats the above-mentioned marking operation again when marking the third reference points (M3, M3', M3''...) (see FIG. 13).

[0079] The pattern electrode 10 in Fig. 4 is a double-sided electrode in which the upper and lower surfaces are coated with an electrode active material. Therefore, movable marking devices 20, 20' may be installed on the upper and lower surfaces, respectively, of the pattern electrode 10. When the electrode is a double-sided electrode, guide shafts R, R' serving as the movement shafts of the movable marking devices 20, 20' may also be installed on the upper and lower surfaces, respectively, of the electrode.

[0080] However, it goes without saying that the present invention can also be applied to a cross-sectional electrode in which an active material is coated on only one side of the pattern electrode 10. In this case, the moving marking machine 20 is installed on the one side.

[0081] In FIG. 4, for convenience of explanation, the reference point marking device 100 is shown to mark the reference point M on the upper and lower surfaces of the pattern electrode at the same time. However, in reality, the reference point marking on the upper and lower surfaces of the electrode may be sequentially performed depending on the layout of the factory equipment. For example, after an active material is first coated and dried on the upper surface of the pattern electrode 10, the reference point marking device 100 may mark the reference point M on the upper surface, and then the pattern electrode 10 may change the traveling path and continue traveling, and after an active material is coated and dried on the lower surface of the pattern electrode 10, the reference point marking device 100 may mark the reference point M on the lower surface. In this case, the reference point marking device 100 may be disposed on the upper and lower surfaces of the electrode according to the electrode traveling path to mark the reference points. Alternatively, one reference point marking device 100 may mark the reference point M on both the upper and lower surfaces of the electrode.

[0082] The marked reference point M may include sequence information of each planned electrode lane portion, and pattern number unit or pattern sequence information of the reference point along the longitudinal direction of the pattern electrode 10. That is, the reference point may include information indicating which planned electrode lane portion in the width direction the planned electrode lane portion at which the reference point is marked is. Also, the number of patterns may be directly displayed to indicate which pattern number position of the non-coated portion 11' the reference point is coated at, or the sequence of the pattern numbers may be displayed including information in the reference point.

[0083] Such information may be displayed in the form of a bar code, or in the form of a combination of numbers, Korean characters, English letters, etc.

[0084] For example, in the reference point M displayed as "A0001," "A" represents the order information of the corresponding electrode lane planned portion. A represents the first electrode lane planned portion according to alphabetical order.

[0085] The numbers after the letters indicate pattern information. The above pattern information includes the pattern number unit or pattern order information of the reference point along the longitudinal direction of the pattern electrode. The numbers after the letters are 0001, which indicates that it is the first pattern. If the reference point is displayed as "G1372", G indicates the planned location of the 7th electrode lane, and 1372 indicates that it is the 1372nd pattern along the longitudinal direction of the pattern electrode.

[0086] Furthermore, by using alphabets, when the reference point M is recognized in an inverted manner, it can be understood that the start end and the end end of the pattern electrode 10 are reversed. That is, in a series of electrode processes including a coating process, a roll press process, and a slitting process, the start end and the end end of the electrode are recognized in an inverted manner according to the winding and unwinding directions, for example, the end end of the electrode roll in the previous process becomes the start end of the electrode roll in the next process. In this case, when the reference point M is displayed with an alphabet, if the alphabet is recognized in an inverted manner, it can be understood which process it is, and the reference point M can be displayed reflecting this on the roll map, or the reference point M can be displayed after being suitably corrected.

[0087] In this way, by using the reference point M having a combination of letters and numbers, the number of patterns of the reference points or the pattern order information and the order information of the electrode lane planned sites can be grasped at a glance. The relationship between such orders and the number of patterns can be input to the control unit 40 or a roll map generating unit described later.

[0088] Furthermore, information regarding the reference point marking positions input to the control unit 40 is input to a roll map generating unit as described below, and the roll map generating unit can generate roll maps of the pattern electrode 10 and each individual electrode lane scheduled portion based on such reference point positions. Even if the reference point coordinates expressed by the pattern number as in Fig. 6 vary slightly depending on each electrode lane scheduled portion, since the positions of the patterns to be marked and the marking intervals have been input, there is no problem in creating a roll map with reference to such reference points or performing processing with reference to them in a subsequent process.

[0089] In summary, according to the present invention, reference points can be efficiently marked on a pattern electrode 10 having a plurality of electrode lane planned locations in units of the number of patterns using one or more movable marking machines 20, so that the electrode process and quality control of each process can be performed automatically and efficiently.

[0090] 7, in the subsequent slitting process, the pattern electrode 10 is slit in the longitudinal direction to form 20 electrode lanes, and the electrode lanes are slit in the transverse direction to form one electrode part per pattern of the coating part. Each electrode part is wound up together with an electrode part of the other polarity and a separator to form a jelly roll type electrode assembly. Each of these electrode assemblies (J / R1, J / R2, J / R3, ..., J / Rn) is housed in a battery can, and electrolyte is poured and sealed to form a small cylindrical battery (B1, B2, B3, ..., Bn).

[0091] The reference points marked by the reference point marking device 100 of the present invention are marked on one non-coated portion 11' for each electrode lane (planned portion) and for each pattern of each coating portion, and are used as reference points from the coating process to the winding process. In addition, since the reference points may remain on the electrode portion even in some processes among the series of subsequent processes as described above as shown in Fig. 7, they may be used as reference information when proceeding or managing the process.

[0092] Second embodiment FIG. 8 is a schematic diagram of a reference point marking device according to a second embodiment of the present invention, FIG. 9 is a schematic diagram showing the operating process of the marking device according to the second embodiment, and FIG. 10 is a schematic diagram showing reference points and defects being marked according to the second embodiment.

[0093] In the reference point marking device 200 of this embodiment, the movable marking machine 20 not only marks reference points at the predetermined positions of each electrode lane in the width direction, but also simultaneously performs defect marking on the pattern electrode 10 .

[0094] For this purpose, the reference point marking device 200 further includes a defect marking device 50 arranged in line with the movable marking device 20 in the electrode width direction. The pattern electrode 10 has a non-coated portion 11 along the longitudinal direction at one or both ends in the width direction. That is, the electrode active material is coated only to a certain extent in the width direction of the pattern electrode 10 to form the coated portion 12, and the remaining portion in the width direction becomes the non-coated portion 11. Therefore, the pattern electrode 10 has a non-coated portion 11' arranged between the coated portions 12 in the longitudinal direction of the electrode, and the non-coated portions 11 arranged on both sides in the width direction. The former non-coated portion 11' is marked with a reference point as described above, and the latter non-coated portion 11 can be marked with a defect.

[0095] When marking the non-coated portion 11 at one end in the width direction, one defect marking machine is sufficient. However, when marking the non-coated portion 11 at one end in the width direction, a defect marking machine is required at each end of the electrode.

[0096] In the example of FIG. 8, a reference point marking device 200 for applying defect marking to the non-coated portions 11 on both ends of the pattern electrode 10 in the width direction is shown.

[0097] 9, one guide shaft R is arranged along the width direction on the pattern electrode 10, and a total of three marking machines including the movable marking machine 20 and the defective marking machine (one side end marking machine 50A and the other side end marking machine 50B) are coupled to the guide shaft R. The movable marking machine 20 is installed so as to be movable along the guide shaft.

[0098] The one-side end marking machine 50A and the other-side end marking machine 50B may also include a marking unit 53, a vision camera 51 (or a recognition sensor) and an illumination device 52 in addition to the mobile marking machine 20.

[0099] Referring to FIG. 10, it is shown that a defective marking G has been made on an uncoated portion 11 at one end of a width direction of a pattern electrode 10 by a marking portion of a defective marking machine.

[0100] The marking device 200 of this embodiment can not only display reference points on the pattern electrode 10 in units of the number of patterns, but also, when a defect is detected, can mark the defective portion or defective section on the pattern electrode 10. As a result, the reference point M and the defective portion are simultaneously displayed on the pattern electrode 10, and based on this, the reference point M and the defect can also be visually shown on the roll map.

[0101] 8, in order to recognize defects, a predetermined defect inspection machine 60, 70 may be disposed in front of the position of the defect marking machine 50. The defect inspection machine 60, 70 may inspect the pattern electrode 10 moving in a roll-to-roll state to obtain inspection data related to defects, and may obtain coordinate data and pattern number unit data of the pattern electrode related to the defective portion and / or defective section from which the inspection data is obtained in conjunction with the position measuring device 30. At least one of the defect inspection machines 60, 70 may be disposed in front of the position of the defect marking machine 50.

[0102] The defect marking machine 50 may mark a defective portion and / or a defective section on the non-coated portion 11 at one or both ends in the width direction of the pattern electrode 10 based on the coordinate data and the pattern number unit data transmitted from the defect inspection machines 60 and 70. That is, when a defective portion is found in a portion of the pattern electrode 10 corresponding to the 450th pattern number by the defect inspection machine, the defect marking machine performs defect marking on the non-coated portion 11 at one or both ends of the electrode corresponding to that pattern number. Also, when a defect occurs only in a portion along the length of the coated portion of the pattern number, the defect marking machine may perform defect marking on a position or section corresponding to the coordinates of that portion based on the coordinate data.

[0103] The defect inspection machines 60 and 70 include, for example, an electrode slurry loading amount measuring instrument, a dimension and width measuring instrument, and an appearance inspection instrument, which are installed on the transfer line of the pattern electrode 10.

[0104] The electrode slurry loading amount measuring device may employ a non-contact thickness measuring sensor such as an ultrasonic sensor, a displacement sensor, a laser sensor, a confocal thickness sensor, etc. Since the thickness of the electrode foil is known, for example, in the case of a confocal thickness sensor, the amount of slurry loading can be measured by analyzing the wavelength of the reflected light of the light emitted from the sensor and calculating the distance (thickness) between the sensor and the electrode.

[0105] The dimension and width measuring instrument may employ a type of vision measuring instrument that can photograph or scan the exterior of the electrode to be coated to measure the electrode width, the width of the coated and uncoated portions, etc. When the widths of the coated and uncoated portions are known, the presence or absence of a mismatch between the coated and uncoated portions may also be known.

[0106] The appearance inspection machine can capture an appearance image of the electrode by imaging the appearance. This can provide data on appearance defects such as pinholes, lines, and crater shapes, and can also provide data on insulation appearance and insulation defects. The appearance inspection machine can also include an inspection machine having a sensor that can distinguish the color of the electrode, such as a color sensor. The color sensor can detect parts that are different in color from the electrode, such as a connecting tape or a PET film.

[0107] In addition to the measuring instruments or inspection machines mentioned above, defect inspection machines for detecting other types of defects may also be applied.

[0108] The defect inspectors 60 and 70 are connected to and cooperate with the position measuring device 30 or the control unit 40 connected to the position measuring device to obtain longitudinal position data (coordinates and pattern number unit data) of a defect portion where a defect is detected or a defect section where a defect portion continues. Thus, the defect inspectors 60 and 70 can obtain not only inspection data on the type, size, shape, and properties of the defect, but also coordinate data of the electrode position where the inspection data is obtained and pattern number unit data. The inspection data, coordinate data, and pattern number unit data are transmitted to the control unit 40. The control unit 40 issues an instruction to the defect marking device 50 to mark the defect portion and / or the defect section based on the data. The defect marking device 50 performs marking G of the defect portion and / or the defect section based on the coordinate data and pattern number unit data.

[0109] That is, the defect inspection machines 60, 70 recognize a defect at a specific position (coordinate) in the longitudinal direction of the pattern electrode 10, and the control unit 40 controls the defect marking machine 50 to display the defect at that position (coordinate).

[0110] Specifically, the control unit 40 can calculate the time when the electrode portion of the defective portion and / or defective section arrives at the defective marking machine 50 based on the distance between the defect inspection machine 60, 70 and the defect marking machine 50 and the moving speed of the pattern electrode 10. At the time of arrival, the defect marking machine 50 performs marking G of the defective portion and / or defective section according to the marking instruction of the control unit 40. Thus, in this embodiment, the position (coordinates) of the defective portion and / or defective section can be specified based on the coordinate data and the pattern number unit data transmitted from the defect inspection machine. Also, the control unit 40 controls the defect marking machine 50 so that the defect marking machine 50 marks the defect at a specific time based on the specified position (coordinates).

[0111] When a specified defect inspection machine is installed for defect marking, the control unit can obtain coordinate data of the defective point or defective section in conjunction with the defect inspection machine and a position measuring device, and can issue defect marking instructions to the defect marking machine based on the coordinate data.

[0112] <Role map generator> FIG. 11 is a schematic diagram of a roll map generating device according to another aspect of the present invention, FIG. 12 is a schematic diagram of a data visualization device included in the roll map generating unit, and FIG. 13 is a schematic diagram showing a roll map of a pattern electrode 10 and individual electrode lane planned locations generated by the roll map generating device of the present invention.

[0113] The roll map generating device 300 of the present invention includes a position measuring device 30 that acquires the longitudinal position of the pattern electrode 10 as coordinate data corresponding to the amount of rotation of the unwinder or rewinder when the pattern electrode 10, in which coated portions 12 and non-coated portions 11' are repeatedly arranged along the longitudinal direction of the electrode, moves in a roll-to-roll state between the unwinder UW and the rewinder RW, and can express the coordinate data as pattern number unit data of the coating portion; a moving marking machine 20 that works in conjunction with the position measuring device to mark reference points M on the pattern electrode 10 at predetermined intervals along the longitudinal direction of the pattern electrode; and a roll map generating unit 80 that works in conjunction with the position measuring device and the marking machine to acquire coordinate data relating to the longitudinal position of the pattern electrode 10, pattern number unit data of the coating portion, and pattern number unit data relating to reference point M, and displays at least the pattern number unit data on a roll map that imitates the electrode moving in a roll-to-roll state to generate a roll map.

[0114] The pattern electrode 10 has a plurality of electrode lane regions that are formed into a plurality of electrode lanes by being slit along the longitudinal direction of the electrode in a subsequent process. The marking machine is a moving marking machine 20 that moves along the width direction of the pattern electrode 10 and marks reference points on the non-coated portions 11' of each electrode lane region arranged along the width direction.

[0115] Since the pattern electrode 10 moves due to the rotation of the unwinder UW and the rewinder RW, the longitudinal position coordinate of the pattern electrode 10 can be determined according to the amount of rotation of the unwinder UW or the rewinder RW. As described above, the position measuring device 30 can express such longitudinal position coordinate of the electrode 10 as pattern number unit data of the coating portion. For example, if the pattern number unit acquired by the position measuring device 30 is 0, it indicates the start end of the pattern electrode 10, and if the pattern number coordinate of the 1200th order is acquired for a pattern electrode 10 having 1200 patterns, it means that the end end of the electrode 10 has been measured by the position measuring device.

[0116] As described above, the pattern number unit data in the longitudinal direction of the pattern electrode 10 can be detected by the rotary encoders 30U, 30R installed on the unwinder UW or the rewinder RW.

[0117] The marking machine may be the moving marking machine 20 employed in the above-mentioned reference point marking devices 100 and 200. In addition to the moving marking machine 20, a defect marking machine 50 may be further included for marking defect marks on the non-coated portion 11 at one or the other end in the width direction of the pattern electrode. As shown in Fig. 11, the defect marking machine 50 may be disposed alongside the moving marking machine 20 along the electrode width direction.

[0118] The moving marking machine 20 and the defect marking machine 50 can be linked to the position measuring device 30 directly or via the control unit 40, so that they can mark reference points M at predetermined intervals along the longitudinal direction of the pattern electrode and also perform defect marking on the non-coated portion 11.

[0119] The present invention includes a roll map generation unit 80 which, in cooperation with the position measuring device 30, the moving marking machine 20 and the defect marking machine 50, acquires coordinate data relating to the longitudinal position of the pattern electrode and pattern number unit data relating to the reference point M, and displays the coordinate data and pattern number unit data on the roll map to generate a roll map.

[0120] The roll map generating unit 80 obtains pattern number unit data along the longitudinal direction of the pattern electrode 10 in cooperation with the position measuring device, and can express the position and interval of the reference point M as pattern number unit data in cooperation with the moving marking machine 20. The pattern number unit data of the reference point M can be transmitted to the roll map generating unit 80 from the moving marking machine 20 directly or via the control unit 40.

[0121] The roll map generating unit 80 can generate a roll map of the pattern electrode 10 and a roll map of each individual electrode lane planned portion constituting the pattern electrode 10 based on the pattern number unit data of the reference point M marked by the mobile marking machine 20.

[0122] Also, the roll map generating unit 80 may generate a roll map that displays information on defects in addition to information on the reference point M. To this end, at least one defect inspector 60, 70 may be disposed in front of the defect marking device 50, which inspects the pattern electrode 10 to obtain inspection data on defects and, in conjunction with the position measuring device, obtains coordinate data and pattern number unit data on the defective points and / or defective sections from which the inspection data is obtained. The types of the defect inspectors 60, 70 have been described above, so further description will be omitted.

[0123] As described above, the defect marking machine 50 may perform defect marking on the non-coated portion 11 at one or both ends in the width direction of the pattern electrode 10 based on the coordinate data and the pattern number unit data transmitted from the defect inspection machines 60 and 70. The roll map generating unit 80 may display the coordinate data and the pattern number unit data of the defect marking G, and the pattern number unit data of the reference point M on the roll map.

[0124] The roll map generating unit 80 may include a database 81 that stores data acquired from the defect inspection machines 60 and 70, the moving marking machine 20, the defect marking machine 50, and the position measuring device 30, or stores data related to the quality, dimensions, etc. of normal electrodes. The roll map generating unit 80 may also include a central processing unit 82 that processes the acquired data and commands a visualization device 83 included in the roll map generating unit 80 to visualize the data.

[0125] The roll map generating unit 80 includes a visualization device 83 that defines a visualization area forming a roll map that replicates the electrodes 10 and displays pattern number unit data on the defined area. The visualization device 83 is connected to the central processing unit 82, and can visualize and display the test data and pattern number unit data according to instructions from the central processing unit 82.

[0126] Referring to FIG. 12, the visualization device 83 includes an acquired data input unit 83a, a coordinate (number of patterns) on the roll map grasping unit 83b, and an image generating unit 83c.

[0127] The acquired data input unit 83a receives and inputs data from the central processing unit 82.

[0128] The roll map coordinate grasping unit 83b may define a visualization area forming the roll map and define pixel coordinate values ​​in the visualization area for each data element of the acquired raw data. At this time, when data on the specifications of the electrode roll, such as the lot number, length, and width, are input to the control unit 40 or the server by registering the electrode roll information, the roll map coordinate grasping unit 83b may calculate and determine the visualization area of ​​the roll map according to a predetermined scale conversion scale from such data on the size of the electrode 10. Alternatively, it is also possible to calculate and determine the visualization area of ​​the roll map according to a predetermined scale conversion scale from the position data of the electrode 10 in the longitudinal and width directions described above.

[0129] The coordinate grasping unit 83b can map the acquired quality or defect data and the (width and length) position data of the electrode 10, and assign the mapped data on the visualization area (roll map) based on pixel coordinates.

[0130] The image generating unit 83c may express the mapped data elements assigned to each pixel coordinate in the visualization area with at least one legend. The legend means various shapes such as a circle, a square, a triangle, etc. displayed in the visualization area, or the above shapes with colors. Therefore, the image generating unit 83c may visually display various data related to quality or defects at pixel coordinates corresponding to each position data of the actual electrode 10 in a visualization area called a roll map with a display unit of a pattern, shape, and color designated for each data, and may generate the roll map of the present invention.

[0131] Also, based on data stored in a storage unit such as database 81, data corresponding to a specific range of the role map can be read from the storage unit and displayed (image generated) on the screen. At this time, the central processing unit 82 can issue a command to the visualization device 83 to visually display test data found to be abnormal compared with normal data stored in database 81, distinguishing it from other data.

[0132] The size setting of the visualization area and the generation of the image by grasping the coordinates of the visualization area can be performed by various conventional user interfaces, or various programs and processing tools related to data allocation, processing, analysis, and visualization. Therefore, the role map generator 80 described above is merely an example, and is not limited to the above embodiment.

[0133] The above-mentioned roll map generating unit 80 may be, for example, a data processing system such as a manufacturing operation system (MES). In the electrode 10 manufacturing process, an electrode MES is provided that manages a series of electrode manufacturing processes such as coating, pressing, slitting, etc. Therefore, when the above-mentioned coordinate data, inspection data, etc. are sent to the electrode MES, the above-mentioned roll map can be generated by the electrode MES.

[0134] The roll map generating device 300 of the present invention displays the generated roll map on the display unit 90, so that the reference point M and data regarding defects can be visually and easily grasped at a glance.

[0135] The roll map generating apparatus 300 of the present invention may include a control unit (PLC control unit) for controlling movement of the electrodes between the unwinder UW and the rewinder RW. In this case, the control unit may be connected to the position measuring device 30 and the defect inspectors 60, 70, and may transmit the electrode positions and the pattern number unit data of the inspection data to the roll map generating unit 80. In this case, the control unit 40 may process the inspection data and the pattern number unit data in a form that is easy to process in the roll map generating unit 80. Since the PLC control unit is connected to the defect inspectors 60, 70 and encoders, etc., and controls the roll-to-roll transfer of the electrodes, it is more efficient in terms of data processing and management to transmit data via the control unit 40 than to transmit data directly from the defect inspectors, encoders, etc. to a data processing system such as an electrode MES.

[0136] FIG. 13 shows a roll map of the pattern electrode 10 generated by the roll map generating device of the present invention.

[0137] 13 shows roll maps of the first electrode lane intended site, the second electrode lane intended site, and the twentieth electrode lane intended site. The roll maps of the third electrode lane intended site to the 19th electrode lane intended site are omitted for convenience of illustration.

[0138] The roll map shows that the position of reference point M is shifted further rearward in the longitudinal direction as it approaches the lower planned electrode lane location in the width direction.

[0139] The roll map also displays defective points or defective sections G by the defect inspection machine. As described above, the defect inspection machine linked to the position measuring device transmits inspection data and pattern number unit data of the position where the inspection data was acquired to the roll map generating unit 80, and the roll map generating unit visualizes and displays the defective points and / or defective sections at the pattern number positions on the roll map based on the transmitted data.

[0140] As shown in Fig. 13, the roll map generator 80 of the present invention can display the reference point M and the pattern number unit data of the defective portion and / or defective section on the roll map. If necessary, the roll map generator 80 can display coordinate data (meter (m) information) according to the longitudinal direction of the pattern electrode in addition to the pattern number unit data on the roll map. That is, according to the present invention, not only the coordinate information but also the pattern information can be used and displayed when generating a roll map, which is suitable for use in a pattern electrode process for small batteries.

[0141] Therefore, in the electrode process, data relating to the reference point M, electrode loss, quality and defects can be visually and easily grasped at a glance.

[0142] As described above, according to the present invention, since reference points can be marked on a pattern electrode with a simple configuration, the marking process and costs are significantly reduced. Since reference points are marked on the non-coated portion 11' of each electrode lane location based on data per pattern number, it has the advantage of being more compatible with the management mechanism of small pattern electrodes that manage electrodes per pattern number. In addition, since defect marking can be performed simultaneously with reference point marking, defects in the electrode can be easily found.

[0143] In addition, since a roll map can be generated using the reference point marking device, it is very convenient to automatically perform electrode quality control. In addition, since a quality history can be managed based on the roll map, quality tracking becomes easy when an abnormality occurs in a product.

[0144] The present invention has been described in more detail above with reference to the drawings and embodiments, etc. However, the configurations described in the drawings or embodiments, etc. in this specification are merely one embodiment of the present invention and do not represent all of the technical ideas of the present invention, so it should be understood that there may be various equivalents and modifications that can replace them at the time of filing this application. [Explanation of symbols]

[0145] 10: Pattern electrode 11, 11': Non-coated part 12: Coating section X: Longitudinal direction Y: Width direction M:Reference point M1, M1', M1'', M1''': 1st reference point M2, M2', M2'': 2nd reference point M3, M3', M3'': 3rd reference point 20, 20': Mobile marking machine 30: Position measuring device R, R': Guide shaft 40: Control unit C: Coater D: Electrode oven 50: Defective marking machine 50A: One-side end marking machine 50B: Other end marking machine 60, 70: Defective inspection machine G: Defective marking 100, 200: Reference point marking device 80: Role map generator 81: Database 82: Central Processing Unit 83: Visualization device 90: Display section 300: Role map generator

Claims

1. A reference point marking device for a pattern electrode in which coated and uncoated portions are repeatedly arranged along a longitudinal direction, the pattern electrode having a plurality of electrode lane planned portions that are to be slit along the longitudinal direction in a subsequent process to form a plurality of electrode lanes, a moving marking machine that moves along a width direction of the pattern electrode and marks a reference point on an uncoated portion of each electrode lane arranged along the width direction; A control unit that controls the moving marking machine.

2. The non-coated portion of each electrode lane region has a widthwise slitting portion to be slit in the widthwise direction in a subsequent process, The reference point marking device according to claim 1 , wherein the reference point is marked in a non-coated portion that is not a portion to be slit in the width direction.

3. The fiducial marking device according to claim 1 , wherein the moving marking machine marks the fiducials as the pattern electrode moves along a longitudinal direction.

4. 4. The reference point marking device according to claim 3, wherein a marking path when the moving marking machine moves along the width direction and marks each of the non-coated portions of the plurality of electrode lane planned portions is formed as a diagonal path that is inclined backward in the longitudinal direction depending on the longitudinal moving speed of the pattern electrode.

5. 5. The reference point marking device according to claim 3, wherein the movable marking machine marks the reference points sequentially on the non-coated portion of each electrode lane predetermined portion at a position where the movable marking machine is pushed backward in the longitudinal direction, one pattern at a time.

6. 5. The reference point marking device according to claim 3, wherein the movable marking machine marks reference points on the non-coated portion of each electrode lane planned portion at intervals of a predetermined number of patterns of the coating portion along the longitudinal direction.

7. The pattern electrode is a double-sided electrode having an electrode active material coated on both its upper and lower surfaces, The reference point marking device according to claim 1 , wherein the moving marking machines are respectively installed on the upper and lower surfaces of the pattern electrode.

8. a position measuring device that acquires, when the pattern electrode moves in a roll-to-roll state between an unwinder and a rewinder along the longitudinal direction, a longitudinal position of the pattern electrode according to an amount of rotation of the unwinder or the rewinder as coordinate data, and expresses the coordinate data as pattern number unit data of the coating unit, The reference point marking device according to claim 1, wherein the control unit controls the moving marking machine to mark reference points on non-coated portions of each electrode lane planned portion at intervals of a predetermined number of patterns of the coating unit based on the pattern number unit data.

9. The reference points to be marked are 2. The reference point marking device according to claim 1, further comprising: sequence information of each electrode lane planned portion; and pattern number unit or pattern sequence information of the reference points along the longitudinal direction of the pattern electrode.

10. 9. The reference point marking device of claim 8, further comprising a defect marking machine arranged in parallel with the movable marking machine along the electrode width direction, for marking a defect on an uncoated portion provided along a longitudinal direction at one or both ends of the width direction of the pattern electrode.

11. A guide shaft is disposed on the pattern electrode along the width direction, The moving marking device and the defect marking device are coupled to the guide shaft; The reference point marking device according to claim 10, wherein the moving marking machine is movably installed along the guide axis.

12. At least one defect inspection machine is disposed in front of the defect marking machine, the defect inspection machine inspecting the pattern electrodes to obtain inspection data related to defects, and the defect inspection machine is linked with the position measuring device to obtain coordinate data of the pattern electrodes and pattern number unit data related to the defective portion and / or defective section from which the inspection data is obtained; 11. The reference point marking device of claim 10, wherein the defect marking machine marks a non-coated portion at one or both ends of the width direction of the pattern electrode as a defect based on the coordinate data and the pattern number unit data transmitted from the defect inspection machine.

13. The control unit is determining a time when the electrode portion of the defective portion and / or the defective section arrives at the defect marking machine based on a distance between the defect inspection machine and the defect marking machine and a moving speed of the pattern electrode; The reference point marking device according to claim 12, wherein the defect marking is controlled to mark the defect location and / or the defect section at the time of arrival.

14. a position measuring device which, when a pattern electrode in which coated portions and non-coated portions are repeatedly arranged along the longitudinal direction of the electrode moves in a roll-to-roll state between an unwinder and a rewinder, obtains a longitudinal position of the pattern electrode as coordinate data corresponding to an amount of rotation of the unwinder or the rewinder, and expresses the coordinate data in data per pattern number of the coating portion; a marking device which marks reference points at predetermined intervals on the pattern electrode along a longitudinal direction of the pattern electrode in cooperation with the position measuring device; a roll map generating unit that, in cooperation with the position measuring device and the marking device, acquires coordinate data relating to the longitudinal position of the pattern electrode, pattern number unit data of the coating unit, and pattern number unit data relating to a reference point, and generates a roll map by displaying at least the pattern number unit data on a roll map that replicates an electrode moving in a roll-to-roll state; The pattern electrode has a plurality of electrode lane predetermined portions that are to be formed into a plurality of electrode lanes by being slit along a longitudinal direction of the electrode in a subsequent process, the marking machine is a moving marking machine that moves along a width direction of the pattern electrode and marks a reference point on an uncoated portion of each electrode lane arranged along the width direction, The roll map generating unit is a roll map generating device that generates a roll map of the pattern electrodes and a roll map of individual electrode lane planned sites based on the pattern number unit data marked by the moving marking machine.

15. The method further includes a defect marking machine that performs defect marking on a non-coated portion provided along a longitudinal direction at one or both ends of the width direction of the pattern electrode, and is arranged in parallel with the moving marking machine along the electrode width direction, At least one defect inspection machine is disposed in front of the defect marking machine, the defect inspection machine inspecting the pattern electrodes to obtain inspection data related to defects, and the defect inspection machine is linked with the position measuring device to obtain coordinate data of the pattern electrodes and pattern number unit data related to the defective portion and / or defective section from which the inspection data is obtained; the defect marking machine marks a non-coated portion at one or both ends of the width direction of the pattern electrode based on the coordinate data and the pattern number unit data transmitted from the defect inspection machine; The roll map generating device according to claim 14 , wherein the roll map generating unit displays both the reference point and the defect marking on a roll map based on the coordinate data and the pattern number unit data.

16. A pattern electrode in which coated and uncoated portions are repeatedly arranged along a longitudinal direction, The pattern electrode has a plurality of electrode lane planned portions along a width direction, A pattern electrode having reference points marked at intervals of a predetermined number of patterns on the non-coated portion of each electrode lane planned area.

17. The pattern electrode according to claim 16 , wherein the reference points include sequence information of each of the planned electrode lane portions, and pattern number units or pattern sequence information of the reference points along the longitudinal direction of the pattern electrode.

18. The pattern electrode according to claim 16 , further comprising a defect marking portion in an uncoated portion at one or both ends in a width direction of the pattern electrode.

19. A roll map is a simulated electrode that replicates a pattern electrode in which coated and uncoated portions are repeatedly arranged along a longitudinal direction, The pattern electrode is 1) Coordinate data relating to the longitudinal position of the pattern electrode 2) Data on the number of patterns related to the longitudinal positions of the pattern electrodes 3) A plurality of reference points displayed on the non-coated portion between the coated portions at intervals of a predetermined number of patterns. 4) Coordinate data of the reference points and / or pattern number data 5) A defect marking portion for indicating a defect in the pattern electrode or coordinate data of the defect marking portion and / or pattern number data A role map including at least one of the following pieces of information:

20. The pattern electrode has a plurality of electrode lane planned portions along a width direction, 20. The roll map of claim 19, wherein the roll map of the patterned electrodes includes a roll map of each electrode lane planned site.

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