Reference point marking device and roll map generating device

Abstract

The present invention relates to a marking device for marking reference points on a multi-lane electrode having a plurality of electrode lanes arranged along a width direction. The marking device includes a first marking device for marking reference points on non-coated portions of electrode lanes located at one end or both ends in the width direction of the multi-lane electrode, a second marking device for marking reference points on non-coated portions of remaining electrode lanes except for the electrode lane located at the one end or the electrode lanes located at both ends while moving along the width direction, and a control unit for controlling operations of the first and second marking devices. The present invention also provides a roll map generating device using the reference point marking device.

Description

[Technical field]

[0001] The present invention relates to a reference point marking device capable of efficiently marking a reference point on each electrode lane when a multi-lane electrode having a plurality of electrode lanes is moved.

[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. 10-2022-0109335 dated August 30, 2022, and all contents disclosed in the documents of that 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 a 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 displayed on a screen that imitates 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 in Figure 1 is a roll map (RM) that simulates the movement of the electrode moving 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 simulation of an actual electrode, and various types of breakage occur in an actual electrode. When one of the detailed processes of the electrode process is carried out, an electrode breakage 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 is also displayed 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 mentioned above, since the electrode removal parts are manually input by the operator, it is difficult to know the exact amount of electrode loss.

[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] Meanwhile, in recent years, in order to meet the increased demand for pouch or cylindrical batteries used in large automobile batteries, or small batteries used in small electric mechanisms, etc., multi-lane electrodes in which multiple electrode lanes are arranged along the width direction have been actively developed. The multi-lane electrode is formed by repeatedly arranging coated parts, in which an electrode active material is coated, and uncoated parts, in the width direction, on one electrode plate (current collector). After undergoing the above-mentioned coating process and roll press process, the multi-lane electrode is cut into each electrode lane in a slitting process.

[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 of travel of the electrode. The electrode 1 has a non-coated portion 1a formed on both sides of one coated portion 1b. Therefore, it is 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 the non-coated portion 1a on both sides. However, such a conventional reference point marking machine 2 is not suitable for marking a reference point on a multi-lane electrode, which is effective for electrode productivity. In order to mark a reference point on each of the multiple electrode lanes of a multi-lane electrode, multiple marking machines are required. However, as the number of marking machines increases, the manufacturing cost increases and the installation process becomes more complicated. In addition, the number of optical components required for the marking machine also increases, further increasing the manufacturing cost.

[0021] Therefore, in order to mark reference points on recent multi-lane electrodes or multi-lane electrodes, it can be said that there is a demand for the development of a technology that can efficiently mark reference points while reducing the number of marking machines. [Prior art documents] [Patent documents]

[0022] [Patent Document 1] Korean Patent No. 10-601567 Summary of the Invention [Problem to be solved by the invention]

[0023] An object of the present invention is to provide a reference point marking device of simple structure capable of efficiently marking reference points on a multi-lane electrode having a plurality of electrode lanes.

[0024] Another object of the present invention is to provide a roll map generating device that can effectively display reference point information and information regarding electrode defects on a roll map using the above-mentioned reference point marking device. [Means for solving the problem]

[0025] To solve the above problems, the reference point marking device of the present invention is a marking device for marking reference points on a multi-lane electrode having a plurality of electrode lanes arranged along a width direction, and includes a first marking device for marking reference points on uncoated portions of electrode lanes located at one end or both ends of the width direction of the multi-lane electrode, a second marking device for moving along the width direction to mark reference points on uncoated portions of remaining electrode lanes excluding the electrode lane located at the one end or the remaining electrode lanes excluding the electrode lanes located at both ends, and a control unit for controlling operations of the first and second marking devices.

[0026] The first marking machine may include a one-side end marking machine which marks a reference point on a non-coated portion of an electrode lane located at one side end in a width direction of the multi-lane electrode, and the second marking machine may mark a reference point on each of the non-coated portions of a plurality of electrode lanes excluding the electrode lane located at the one side end.

[0027] The first marking device may include a one-side end marking device and an other-side end marking device that mark reference points on uncoated portions of electrode lanes located at one and other width ends of the multi-lane electrode, respectively, and the second marking device may mark reference points on uncoated portions of one or a plurality of electrode lanes arranged between the electrode lanes located at the one and other width ends.

[0028] As one example, a guide shaft may be arranged on the multi-lane electrode along the width direction of the multi-lane electrode, the first marking device and the second marking device may be coupled to the guide shaft, and the second marking device may be installed so as to be movable along the guide shaft.

[0029] When marking reference points on multi-lane electrodes having different widths, the first marking device may be movable in a width direction along the guide shaft in response to the change in width.

[0030] As the multi-lane electrode moves along the longitudinal direction, the first and second marking machines may mark reference points on the uncoated portion of each electrode lane at predetermined intervals along the longitudinal direction of the multi-lane electrode.

[0031] When the second marking machine moves along the width direction and marks each of the multiple electrode lanes, the marking path may be formed as a diagonal path that is inclined backward in the longitudinal direction of the electrode depending on the moving speed of the multi-lane electrode in the longitudinal direction.

[0032] The multi-lane electrode is a double-sided electrode having an electrode active material coated on both its upper and lower surfaces, and the first and second marking devices may be installed on the upper and lower surfaces of the multi-lane electrode, respectively.

[0033] The marked reference points may include coordinates of the reference points along the longitudinal direction of the multi-lane electrode or sequence information of the reference points, and sequence information of each electrode lane along the width direction of the multi-lane electrode.

[0034] The reference point marking device may further include a position measuring instrument that acquires the longitudinal position of the electrode according to the amount of rotation of the unwinder or rewinder as coordinate data when the multi-lane electrode moves along the longitudinal direction in a roll-to-roll state between the unwinder and the rewinder, and the first marking machine and the second marking machine may mark reference points based on the coordinate data.

[0035] The first marking machine may mark defective points and / or defective sections of the multi-lane electrode instead of or in addition to marking the reference points.

[0036] At least one defect inspection machine is disposed in front of the first marking machine, which inspects the multi-lane electrode moving in a roll-to-roll state to obtain inspection data regarding defects and which can obtain coordinate data of the electrode regarding the defective points and / or defective sections from which the inspection data is obtained in conjunction with the position measuring device, and the first marking machine can mark the defective points and / or defective sections on the non-coated portions at one or both ends of the multi-lane electrode in the width direction based on the coordinate data transmitted from the defect inspection machine.

[0037] The control unit can determine the time when the electrode portion of the defective portion and / or defective section arrives at the first marking machine based on the distance between the defect inspection machine and the first marking machine and the moving speed of the multi-lane electrode, and can control the first marking machine to mark the defective portion and / or defective section at the time of arrival.

[0038] A roll map generating device according to another aspect of the present invention includes a position measuring device that acquires a longitudinal position of a multi-lane electrode as coordinate data according to an amount of rotation of an unwinder or a rewinder when the multi-lane electrode moves in a roll-to-roll state between an unwinder and a rewinder, a marking machine that works in conjunction with the position measuring device to mark reference points at predetermined intervals on the multi-lane electrode along the longitudinal direction of the multi-lane electrode, and a roll map generating device that acquires coordinate data of the longitudinal position and reference points of the electrode in conjunction with the position measuring device and the marking machine, and displays the coordinate data on a roll map simulating an electrode moving in a roll-to-roll state to generate a roll map. and a roll map generating unit, the marking machines including a first marking machine which marks reference points on non-coated portions of electrode lanes located at one end or both ends in a width direction of the multi-lane electrode, and a second marking machine which moves along the width direction and marks reference points on non-coated portions of remaining electrode lanes excluding the electrode lane located at the one end or the remaining electrode lanes excluding the electrode lanes located at both ends, and the roll map generating unit may generate a roll map of the multi-lane electrode and a roll map of each individual electrode lane constituting the multi-lane electrode based on coordinate data of the reference points marked by the first marking machine and the second marking machine.

[0039] At least one defect inspection machine capable of inspecting the multi-lane electrode to obtain inspection data regarding defects and of obtaining coordinate data of electrodes regarding the defective points and / or defective sections from which the inspection data is obtained in conjunction with the position measuring device is disposed in front of the position of the first marking machine, the first marking machine marks the defective points and / or defective sections on non-coated portions at one or both ends of the multi-lane electrode in a width direction based on the coordinate data transmitted from the defect inspection machine, and the roll map generating unit may display both the coordinate data of the reference point and the coordinate data of the defective points and / or defective sections on a roll map. Effect of the Invention

[0040] According to the present invention, reference points can be marked corresponding to all of a plurality of electrode lanes using a first marking machine that marks reference points on electrode lanes at one or both ends of a multi-lane electrode, and a second marking machine that marks reference points on the remaining electrode lanes.

[0041] Therefore, the number of marking machines for the fiducial marking can be significantly reduced, which can significantly reduce the manufacturing cost, and the number of expensive optical components (e.g., vision cameras, lighting devices, etc.) required for each marking machine can also be reduced, which can further reduce the manufacturing cost.

[0042] Furthermore, since the first marking device can display electrode defects in addition to the reference points, both the reference points and the electrode defects can be displayed on the multi-lane electrodes.

[0043] According to the present invention, a roll map simulating a multi-lane electrode can be realized based on the reference point coordinate information 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 multi-lane electrode can be visually and easily grasped at a glance by associating it with the reference points.

[0044] In addition, since the roll map on which the reference points are displayed can be referred to during quality control, defect management, and subsequent process processing in each detailed process of the electrode process, subsequent process processing and defect removal can be performed accurately. [Brief description of the drawings]

[0045] [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] 1 is a schematic diagram of a reference point marking device according to a first embodiment of the present invention. [Figure 4]3 is a schematic diagram showing an operation process of a first marking machine and a second marking machine according to the first embodiment; FIG. [Diagram 5] 3 is a schematic diagram showing a reference point being marked on a multi-lane electrode by the reference point marking device of the first embodiment; FIG. [Figure 6] FIG. 11 is a schematic diagram of a reference point marking device according to a second embodiment of the present invention. [Figure 7] 10 is a schematic diagram showing an operation process of a first marking machine and a second marking machine according to a second embodiment. FIG. [Figure 8] 13 is a schematic diagram showing reference points being marked on a multi-lane electrode by a reference point marking device of a second embodiment. FIG. [Figure 9] FIG. 11 is a schematic diagram of a reference point marking device according to a third embodiment of the present invention. [Figure 10] 13 is a schematic diagram showing marking by the reference point marking device of the third embodiment. FIG. [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] FIG. 2 is a schematic diagram showing roll maps of a multi-lane electrode and individual electrode lanes generated by the roll map generator of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0046] 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.

[0047] 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.

[0048] The present invention relates to a marking device for marking reference points on a multi-lane electrode, and also to a roll map generating device for generating a roll map using the marking device.

[0049] In this specification, the multi-lane electrode refers to an "electrode in which a plurality of electrode lanes are arranged along the width direction." The width direction refers to the width direction of the multi-lane electrode or the width direction of the current collector on which the active material is coated. On the multi-lane electrode, a coated portion coated with the active material and a non-coated portion where the active material is not coated and the surface of the current collector is exposed are repeatedly arranged along the width direction. In a narrow sense, only the coated portion may be referred to as the electrode lane. However, in a broad sense, the coated portion and the non-coated portion manufactured by the electrode tab may be collectively referred to as the electrode lane. In this specification, a coated portion and an adjacent non-coated portion are collectively defined as one electrode lane.

[0050] Since the non-coated portions are arranged at both ends of the multi-lane electrode, the number of non-coated portions on the multi-lane electrode is one more than the number of coated portions. That is, if adjacent non-coated portions and coated portions are regarded as one electrode lane, a multi-lane electrode having n electrode lanes has n coated portions and n+1 non-coated portions. Coated portions and non-coated portions are arranged alternately on the multi-lane electrode, and non-coated portions are arranged at both ends of the multi-lane electrode, so that when one coated portion is used as a reference, non-coated portions are arranged on both sides of the coated portion. In this specification, the "non-coated portion of one electrode lane" on which a reference point is marked means a non-coated portion arranged on one or the other side of the coated portion. When a reference point is marked from one side of the width of the multi-lane electrode along the width direction, the non-coated portion on one side based on the coated portion becomes the "non-coated portion of the electrode lane". In this case, a reference point may not be marked on the non-coated portion at the other end of the width direction of the multi-lane electrode. Conversely, when a reference point is marked along the width direction from the other side of the multi-lane electrode, the non-coated portion on the other side based on the coated portion becomes the “non-coated portion of the electrode lane.” In this case, a reference point may not be marked on the non-coated portion at one end of the multi-lane electrode in the width direction.

[0051] In this specification, "multi-lane" includes two or more electrode lanes. However, in terms of the effects of the present invention, it is preferable that the multi-lane electrode includes three or more electrode lanes. For example, when a multi-lane electrode has two electrode lanes, a first marking machine described below may mark a reference point on an uncoated portion of an electrode lane located on one side of the multi-lane electrode. In this case, a second marking machine moving along the width direction may mark a reference point on an uncoated portion of an electrode lane on the other side. However, in this case, two marking machines are arranged on two electrode lanes, and it is not practical to view it as a true multi-lane or multi-lane electrode reference point marking device as intended by the present invention.

[0052] When there are three electrode lanes, the first marking machine may mark a reference point on the uncoated portion of the electrode lane (first electrode lane) at one end of the multi-lane electrode, and the second marking machine may mark reference points while moving in the width direction on the uncoated portions of the remaining electrode lanes (second electrode lane and third electrode lane). In this way, when there are three or more electrode lanes, one second marking machine may mark reference points corresponding to two or more electrode lanes, so that the effects of the present invention may be substantially achieved.

[0053] Also, a separate first marking machine may be installed in the electrode lane (third electrode lane) at the other end of the other lane electrode to mark a reference point. That is, two first marking machines may mark reference points on the non-coated portions of the first electrode lane and the third electrode lane, respectively, and a second marking machine movable to the non-coated portion of the second electrode lane may mark a reference point.

[0054] The greater the number of remaining electrode lanes excluding the electrode lanes at one end of the multi-lane electrode, or the greater the number of remaining electrode lanes excluding the electrode lanes at one end and the other end, the greater the usefulness of the second marking device for marking reference points along the width direction.

[0055] <Reference point marking device> The reference point marking device of the present invention is a marking device for marking reference points on a multi-lane electrode having a plurality of electrode lanes arranged along a width direction, and includes a first marking device for marking reference points on uncoated portions of electrode lanes located at one end or both ends of the width direction of the multi-lane electrode, a second marking device for moving along the width direction to mark reference points on uncoated portions of remaining electrode lanes excluding the electrode lane located at the one end or the remaining electrode lanes excluding the electrode lanes located at both ends, and a control unit for controlling operations of the first and second marking devices.

[0056] As described above, the multi-lane electrode of the present invention preferably includes three or more electrode lanes. The technical idea of ​​the present invention is that a marking machine (first marking machine) that does not move during reference point marking marks a reference point on a non-coated portion of an electrode lane located at one or both ends in the width direction of the multi-lane electrode, and a second marking machine moves in the width direction to mark reference points on the non-coated portions of the remaining electrode lanes. This makes it possible to mark reference points on the non-coated portions of the remaining electrode lanes with one second marking machine without the need to install separate marking machines for each of the remaining electrode lanes.

[0057] In addition, when two types of marking machines (first and second marking machines) are used to mark the reference points, the reference points marked by the first marking machine can be used as master reference points from the electrode coating process to the slitting process. In addition, since the first marking machine does not move during marking, it can simultaneously mark defective parts and / or defective sections of the electrode in addition to marking the reference points, as described below.

[0058] Meanwhile, the second marking machine marks a reference point independently for each electrode lane, and includes sequence information of the corresponding electrode lane and coordinates or sequence information of the reference point for each reference point, so that it can be used as a criterion or reference when evaluating or tracking quality by creating a roll map for each electrode lane.

[0059] The control unit controls the operation of the first marking machine and the second marking machine. The control unit may be a PLC control unit that controls the electrode transfer when the electrode between the unwinder UW and the rewinder RW is transferred in a roll-to-roll state in the electrode process. The control unit may be connected to a position measuring device (e.g., a rotary encoder) that can acquire the longitudinal position of the electrode according to the rotation amount of the unwinder or the rewinder as coordinate data. Thereby, the control unit can acquire the rotation amount as coordinate data and control the first marking machine and the second marking machine to mark a reference point at a specific longitudinal position when the multi-lane electrode moves. That is, when the electrode moves to a predetermined marking position in the longitudinal direction of the multi-lane electrode, the control unit can issue an instruction to the first marking machine and the second marking machine to mark the reference point. Also, when the multi-lane electrode moves, the control unit can issue an instruction to the first marking machine and the second marking machine to mark the reference point repeatedly at predetermined intervals along the longitudinal direction of the multi-lane electrode. The control unit is set with information on the reference point marking positions and marking intervals, so that the first and second marking machines can mark the reference points on the non-coated portions of the electrode lane.

[0060] Meanwhile, since the second marking machine moves in the width direction, its movement operation, movement speed, etc. can be controlled by the control unit. When the control unit is a PLC control unit that controls the transfer of the electrodes, it can control the movement speed of the multi-lane electrode in the longitudinal direction, and the control unit can determine the movement speed of the second marking machine in conjunction with the movement speed. That is, the control unit can control the second marking machine so that the reference points are marked at desired marking positions by comprehensively considering the movement speed of the multi-lane electrode, the movement speed of the second marking machine, the reference point marking positions, the marking intervals, etc.

[0061] The control unit may also function to control the first marking machine when the first marking machine performs a defect indication on the non-coated portion of the electrode lane. That is, when the first marking machine performs a reference point or a defect indication, the control unit may control the first marking machine as to which marking to prioritize and whether to perform both types of marking. When a predetermined defect inspection machine is installed for defect marking, the control unit may obtain coordinate data of a defective portion or defective section in cooperation with the defect inspection machine and a position measuring device, and may issue an instruction to the first marking machine to perform defect marking based on the coordinate data.

[0062] Furthermore, the control unit may obtain coordinate data for the reference points, the defective locations, or the defective sections, and transmit it to the roll map generator, which may generate a roll map for the multi-lane electrode or each individual electrode lane based on such data.

[0063] Hereinafter, specific embodiments of the reference point marking device of the present invention will be described with reference to the drawings.

[0064] (First embodiment) Figure 3 is a schematic diagram of the reference point marking device of the first embodiment of the present invention, Figure 4 is a schematic diagram showing the operating process of the first marking machine and the second marking machine of the first embodiment, and Figure 5 is a schematic diagram showing a reference point M being marked on a multi-lane electrode 10 by the reference point marking device 100 of the first embodiment.

[0065] In this embodiment, as shown in Fig. 5, a reference point M is marked on a multi-lane electrode 10 having, for example, eight electrode lanes. The multi-lane electrode 10 includes non-coated portions 11 on both ends in the width direction, and has a total of nine non-coated portions 11 and eight coated portions 12.

[0066] 3 and 4, the first marking machine 20 is disposed on the non-coated portion 11 of the electrode lane located at one end in the width direction of the multi-lane electrode 10 (the left end in FIG. 5). The second marking machine 30 marks a reference point M on the non-coated portion 11 of the remaining electrode lanes except for the electrode lane at the one end in the width direction. Therefore, the reference point M is not marked on the non-coated portion 11 at the other end (right end) in the width direction in FIG. 5. At this time, the second marking machine 30 marks the reference point M while moving from the left end to the right end in the width direction.

[0067] Meanwhile, it is also possible for the second marking machine 30 to mark the reference point M while moving from the right end to the left end of Fig. 5. In this case, the first marking machine 20 may mark the reference point M on the non-coated portion 11 at the right end.

[0068] Referring to FIG. 3, the reference point marking device 100 of the present embodiment is configured to be disposed on the multi-lane electrode 10 to mark a reference point M when the multi-lane electrode 10 moves from the unwinder UW to the rewinder RW in a roll-to-roll state. The multi-lane electrode 10 of FIG. 3 is a double-sided electrode in which an electrode active material is coated on the upper and lower surfaces. Therefore, a first marking machine 20 and a second marking machine 30 are installed on the upper surface of the multi-lane electrode 10, and a first marking machine 20' and a second marking machine 30' are installed on the lower surface of the multi-lane electrode 10, respectively. 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 surface of the multi-lane electrode 10. In this case, the first marking machine 20 and the second marking machine 30 are installed on the one surface.

[0069] 4, a guide shaft R is installed along the width direction on a multi-lane electrode 10 running in the longitudinal direction. A first marking machine 20 and a second marking machine 30 are coupled to the guide shaft R. The second marking machine 30 is installed movably along the guide shaft R and marks reference points M on the non-coated portions 11 of the multiple electrode lanes while moving along the width direction in response to a signal from a control unit. When the electrode is a double-sided electrode, the guide shafts R, R' may also be installed on the upper and lower surfaces of the electrode, respectively.

[0070] The marking machine 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 coated portion 12. In the case of a laser type or punching type marking machine, care must be taken when marking the reference point M, since it may leave damage to the non-coated portion 11. However, as described later, when a defect is displayed using the first marking machine 20, the above-mentioned laser type or punching type marking machine may have better visibility.

[0071] The first marking machine 20 and the second marking machine 30 may be the same or different types of marking machines. Preferably, the same type of marking machine is used, which is advantageous for identifying the reference point M and managing the electrode process in a unified manner.

[0072] The marked reference point M may include coordinates of the reference point M along the longitudinal direction of the multi-lane electrode or sequence information of the reference point M, and sequence information of each electrode lane along the width direction of the multi-lane electrode. Such information may be displayed in the form of a barcode, or may be displayed in a form combining numbers, Korean characters, English letters, etc. FIG. 5 shows an example of the reference point M in which numbers and English letters are combined. It should be noted that the reference point M is shown as an example for the purpose of explanation, and may not match the sequence of each electrode lane, the sequence of the reference point M, or the longitudinal coordinate value shown in FIG. 5. For example, in the reference point M of "F605", "F6" represents sequence information of the electrode lane. The sequence of each electrode lane may be defined based on the English alphabet as follows:

[0073] A 1~9 01~09 Lane F 0~9 10~19 Lanes Y 0~9 20~29 Lane

[0074] If the lanes are displayed only with numbers, the numbers to be displayed will be long and the discrimination power may be reduced, so the order of the lanes may be displayed by combining letters and numbers as described above. According to the above regulations, F06 represents the 16th electrode lane. In addition, if the letters are used, it is possible to grasp that the start and end of the multi-lane electrode are reversed when the reference point M is recognized in reverse. That is, in a series of electrode processes including a coating process, a roll press process, and a slitting process, the start and end of the electrode are recognized in reverse according to the winding and unwinding directions, such as the end of the electrode roll in the previous process becoming the start of the electrode roll in the next process. In this case, if the reference point M is displayed with letters, it is possible to grasp which process the process is when F is recognized in reverse, and the reference point M may be displayed by reflecting this on the roll map, or the reference point M may be displayed by appropriately correcting it.

[0075] Furthermore, the number "05" is the order information of the reference point M along the longitudinal direction of the electrode. As shown in FIG. 3, when the multi-lane electrode moves along the longitudinal direction, the first marking machine 20 and the second marking machine 30 mark the reference point M on the non-coated portion 11 of each electrode lane at a predetermined interval along the longitudinal direction of the multi-lane electrode 10. Therefore, the reference point M is the reference point M5 marked fifth along the longitudinal direction. For example, if the reference points M are marked at 100 m intervals, the number "05" indicates that the reference point M5 is marked at a point 500 m from the starting end of the electrode.

[0076] In this way, by using the reference point M which is a combination of letters and numbers, the reference point coordinate or sequence information and the sequence information of the electrode lanes can be grasped at a glance. Of course, it is also possible to express it directly as a longitudinal coordinate such as "500" without expressing the sequence as "05". Since such a sequence and coordinate relationship are input to the control unit or the roll map generating unit described later, by grasping the above-mentioned reference point M, the coordinate data of the reference point M can be easily obtained.

[0077] In this embodiment, ink marking machines are applied as the first marking machine 20 and the second marking machine 30. Referring to FIG. 4, the first marking machine 20 and the second marking machine 30 each include a marking unit (nozzle unit) 23, 33 connected to an ink supply unit (not shown). The first marking machine and the second marking machine each include a vision camera 21, 31 so as to distinguish and recognize the coated portion 12 and the non-coated portion 11. The vision cameras 21, 31 identify the boundary between the coated portion 12 and the non-coated portion 11 so that the marking unit can mark a predetermined marking position of the non-coated portion 11. The first marking machine and the second marking machine each include an illumination device 22, 32 so that the vision camera can easily distinguish the coated portion 12 and the non-coated portion 11. Optical components such as the vision camera and the illumination device are expensive. The present invention has an advantage that since one second marking machine 30 can mark reference points M on a plurality of electrode lanes, the number of expensive optical components can be significantly reduced.

[0078] Since the second marking machine 30 moves in the width direction, its movement range needs to be set. 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 movement range of the second marking machine 30 according to the position detected by the limit sensor. If necessary, the first marking machine 20 or the second marking machine 30 may be provided with a stopper (not shown) for preventing collision. If the first marking machine 20 or the second marking machine 30 collides due to an unexpected cause, a stopper made of an elastic or soft material (e.g., a urethane stopper) may be attached to the side of the marking machine to absorb the impact and prevent damage to the marking machine. Of course, other mechanical and / or electronic stopper mechanisms may be provided on the marking machine or on the guide shaft R connected to the marking machine.

[0079] Referring to FIG. 4, a first marking machine 20 is positioned on the non-coated portion 11 of the electrode lane located at one end of the multi-lane electrode 10, and a second marking machine 30 is installed on one guide axis R on the remaining electrode lanes.

[0080] The first marking device 20 is fixed and does not move in principle when marking the reference point M. However, when the width of the multi-lane electrode changes depending on the type of the multi-lane electrode or the number of electrode lanes, the first marking device 20 may also be made movable to accommodate this. That is, when a multi-lane electrode having three electrode lanes is replaced with a multi-lane electrode having ten electrode lanes, the first marking device 20 may move in the width direction along the guide axis R to accommodate the change in width.

[0081] The movement mechanism of the second marking machine 30 or the first marking machine 20 along the guide axis R may be a known linear movement mechanism. For example, the first marking machine and the second marking machine may include a linear motor capable of linear movement along the guide axis R. In addition, the first marking machine and the second marking machine may include an LM guide mechanism having a bearing in a guided portion to reduce friction when moving along the guide axis R. Since such a linear movement mechanism is known, a detailed description thereof will be omitted.

[0082] Referring again to FIG. 3, an electrode coater C and a drying oven D are disposed in front of the first marking machine 20 and the second marking machine 30. That is, when the reference point M is to be marked by the reference point marking device 100 of the present invention in the electrode coating process, it is necessary to perform the marking after the active material on the electrode is dried. In FIG. 3, the reference point marking device 100 simultaneously marks the reference point M on the upper and lower surfaces of the multi-lane electrode. However, depending on the layout of the factory equipment, the reference point marking on the upper and lower surfaces of the electrode may be sequentially performed. For example, after the active material is first coated and dried on the upper surface of the electrode, the reference point marking device 100 may mark the reference point M on the upper surface, and then the electrode may continue to run and the active material may be coated and dried on the lower surface of the electrode, and 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, respectively, according to the electrode running path to mark the reference points. Alternatively, a single fiducial marking device 100 may be used to mark the fiducial points M on both the upper and lower surfaces of the electrode.

[0083] The control unit 40 controls the first marking machine and the second marking machine to mark the reference points M at a predetermined position and a predetermined interval when the multi-lane electrode travels. A position measuring device 50 capable of acquiring coordinate data of the longitudinal position of the electrode may be provided so that the position and interval of the electrode can be grasped. The position measuring device 50 may acquire the longitudinal position of the electrode according to the rotation amount of the unwinder UW or the rewinder RW as coordinate data. For example, rotary encoders 50U and 50R that extract the position value of the electrode 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. 3, for convenience of explanation, the rotary encoder 50U of the unwinder UW and the rotary encoder 50R of the rewinder RW are shown to be disposed outside the unwinder UW and the rewinder RW, respectively, but the encoders 50U and 50R may be built into the unwinder UW and the rewinder RW, respectively.

[0084] 3, the control unit 40 is connected to the position measuring device 50, and when the electrode reaches a predetermined position during electrode movement, it provides a marking signal to the first marking device 20 and the second marking device 30. The marking signal is repeatedly issued at set predetermined intervals, and the first marking device 20 and the second marking device 30 mark reference points M on the non-coated portion 11 of each electrode lane at predetermined intervals along the longitudinal direction of the multi-lane electrode.

[0085] Referring to FIG. 5, it is shown that the first marking machine 20 and the second marking machine 30 mark the first reference points M1, M1' at a point of 300 m in the longitudinal coordinate of the electrode, and the second reference points M2, M2' at a point of 600 m. When creating a roll map, the reference points M may be marked at positions of 25%, 50%, and 75% of the entire electrode length (total winding) (see FIG. 1). For example, when the electrode is 1200 m long, the reference points M may be marked at points of 300 m, 600 m, and 900 m. As described above, when marking the reference points, the coordinates or sequence information of the reference points and the sequence information of each electrode lane may be marked.

[0086] In the example of FIG. 5, the first marking machine 20 marks the first reference point M1 and the second reference point M2 on the non-coating portion 11 of the first electrode lane at the left end. The second marking machine 30 marks the first reference point M1' and the second reference point M2' on the non-coating portion 11 of the second electrode lane to the eighth electrode lane while moving in the width direction. The reference point (coordinate) of the second electrode lane is marked at the same position as that of the first electrode lane. However, when the second marking machine 30 moves along the width direction, the multi-lane electrode also moves in the electrode running direction (arrow direction in FIG. 5), so that the reference point marking path from the third electrode lane to the eighth electrode lane becomes a diagonal path inclined backward in the longitudinal direction of the electrode due to the moving speed. That is, the reference points M of the third electrode lane to the eighth electrode lane are marked at positions pushed backward by 1.1 m each compared to the first electrode lane and the second electrode lane. The distance pushed backward may vary depending on the width of the multi-lane electrode and each electrode lane, the moving speed of the multi-lane electrode, the moving speed of the second marking device 30, etc. The reference point marking position of each electrode lane may be input to the control unit 40 connected to the position measuring device 50 and the first and second marking devices 20 and 30.

[0087] After the first reference points M1, M1' are marked for each electrode lane, the second marking machine 30 returns again to the position of the non-coated portion 11 of the second electrode lane along the width direction. When the multi-lane electrode moves in the traveling direction and is spaced a predetermined distance (e.g., 300 m) from the first reference points M1, M1', the first marking machine 20 and the second marking machine 30 mark the second reference points M2, M2'. The second marking machine 30 moves again to a diagonal path to mark the reference points M on the non-coated portions 11 of the second to eighth electrode lanes. Thereafter, when marking the third reference point M, the first and second marking machines repeat the marking operations described above.

[0088] The information regarding the reference point marking positions input to the control unit 40 is input to a roll map generating unit as described below, which can generate roll maps of the multi-lane electrode and each individual electrode lane based on such reference point positions. Even if the reference point coordinates of each electrode lane vary slightly, the coordinate positions and the intervals between the coordinates have been input, so there is no problem in creating a roll map or referring to it in subsequent processes. In addition, the coordinates of each electrode lane can be corrected as necessary based on the reference point coordinate positions and intervals.

[0089] In short, according to the present invention, reference points can be efficiently marked on a multi-lane electrode having a plurality of electrode lanes using two types of marking machines, so that the electrode process and quality control of each process can be performed automatically and efficiently.

[0090] Second embodiment FIG. 6 is a schematic diagram of a reference point marking device according to a second embodiment of the present invention, FIG. 7 is a schematic diagram showing the operating process of a first marking device and a second marking device according to the second embodiment, and FIG. 8 is a schematic diagram showing a reference point M being marked on a multi-lane electrode by the reference point marking device 200 according to the second embodiment.

[0091] In this embodiment, a first marking machine is additionally provided at the other end of the multi-lane electrode.Other than that, the first marking machine marks the non-coated portion 11 of the electrode lane located at one end of the multi-lane electrode, and the second marking machine 30 marks the non-coated portion 11 of the remaining electrode lane while moving.Therefore, additional description of the same configuration as the first embodiment will be omitted.

[0092] 6 to 8, the first marking machine 20 of this embodiment is composed of a one-side end marking machine 20A and an other-side end marking machine 20B for marking a reference point M on the non-coated portion 11 of the electrode lanes located at one and the other ends in the width direction of the multi-lane electrode, respectively. In this case, the second marking machine 30 may mark a reference point M on the non-coated portion 11 of one or more electrode lanes arranged between the electrode lanes located at the one and the other ends.

[0093] When one electrode lane is arranged between the electrode lanes located at one end and the other end, there are three electrode lanes in total. In this case, the second marking machine 30 marks a reference point M on the non-coated portion 11 of the electrode lane between the electrode lanes at both ends. As shown in FIG. 8, a plurality of electrode lanes may be arranged between the electrode lanes located at one end and the other end. In this embodiment, a total of eight electrode lanes are provided. The non-coated portions 11 of the first electrode lane at one end and the eighth electrode lane at the other end are marked with the reference point M by the one end marking machine 20A and the other end marking machine 20B, respectively.

[0094] A reference point M is marked by a second marking machine 30 on the non-coated portions 11 of the second electrode lane to the seventh electrode lane, respectively.

[0095] The reference points M of the first electrode lane, the second electrode lane, and the eighth electrode lane are all marked at the same position. However, the path of the reference points M marked on the second electrode lane to the seventh electrode lane is a diagonal path that is inclined backward in the longitudinal direction due to the moving speed of the electrodes.

[0096] The control unit 40 controls the one-side end marking machine 20A, the other-side end marking machine 20B, and the second marking machine 30 to mark reference points M at predetermined intervals along the longitudinal direction of each electrode lane.

[0097] Third embodiment FIG. 9 is a schematic diagram of a reference point marking device according to a third embodiment of the present invention, and FIG. 10 is a schematic diagram showing marking by the reference point marking device according to the third embodiment.

[0098] In the reference point marking device 300 of this embodiment, the first marking machine 20 may perform marking G of defective points and / or defective sections of the multi-lane electrode 10 instead of or in addition to the reference point marking.

[0099] That is, the first marking device 20 can mark the reference points M at a predetermined interval according to an instruction from the control unit 40, and can also mark the defective portion or defective section on the multi-lane electrode when a defect is detected. As a result, the reference points M and the defective portion can be simultaneously displayed on the multi-lane electrode 10, and based on this, the reference points M and the defect can also be visually indicated on the roll map.

[0100] 9, in order to recognize defects, predetermined defect inspection machines 60, 70 may be disposed in front of the position of the first marking machine 20. The defect inspection machines 60, 70 may inspect the multi-lane electrodes moving in a roll-to-roll state to obtain inspection data related to defects, and may obtain electrode coordinate data related to the defective points and / or defective sections from which the inspection data is obtained in conjunction with the position measuring device 50. At least one of the defect inspection machines 60, 70 may be disposed in front of the position of the first marking machine 20.

[0101] The first marking machine 20 may mark (G) defective locations and / or defective sections on the non-coated portion 11 at one or both ends of the multi-lane electrode in the width direction based on the coordinate data transmitted from the defect inspection machines 60 and 70.

[0102] The defect inspection machines 60 and 70 include, for example, an electrode slurry loading amount measuring machine, a dimension and width measuring machine, and an appearance inspection machine, which are installed on a multi-lane electrode transfer line.

[0103] 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.

[0104] 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 portion 12 and the uncoated portion 11, etc. If the widths of the coated portion 12 and the uncoated portion 11 are known, the presence or absence of a mismatch between the coated portion 12 and the uncoated portion 11 may also be known.

[0105] 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.

[0106] In addition to the measuring instruments or inspection machines mentioned above, defect inspection machines for detecting other types of defects may also be applied.

[0107] The defect inspectors 60 and 70 are connected to and cooperate with the position measuring device 50 or the control unit 40 connected to the position measuring device to obtain longitudinal coordinates of the electrode regarding the defective portion where a defect is detected or the defective section where the defective portion continues. Thus, the defect inspectors 60 and 70 can obtain not only inspection data regarding the type, size, shape, and properties of the defect, but also coordinate data of the electrode position where the inspection data is obtained. The inspection data and coordinate data are transmitted to the control unit 40. The control unit 40 issues an instruction to the first marking machine 20 to mark the defective portion and / or defective section based on the inspection data and coordinate data. The first marking machine 20 performs marking G of the defective portion and / or defective section on the non-coated portion 11 at one or both ends in the width direction of the multi-lane electrode based on the coordinate data.

[0108] That is, the defect inspection machines 60, 70 recognize a defect at a specific position (coordinate) in the longitudinal direction of the multi-lane electrode, and the control unit 40 controls the first marking machine 20 to display the defect at that position (coordinate).

[0109] Specifically, the control unit 40 may calculate the time when the electrode portion of the defective portion and / or defective section arrives at the first marking machine 20 based on the distance between the defect inspection machine 60, 70 and the first marking machine 20 and the moving speed of the multi-lane electrode. At the time of arrival, the first marking machine 20 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 may be specified based on the coordinate data transmitted from the defect inspection machine. Also, the control unit 40 controls the first marking machine 20 so that the first marking machine 20 marks the defect at a specific time based on the specified position (coordinates).

[0110] 10 shows that a defective section is marked by the first marking machine 20. The defective marking G is made on the non-coated portion 11 at one end or both ends in the width direction of the multi-lane electrode. That is, when one first marking machine 20 (one-end marking machine 20A) is installed at one end of the multi-lane electrode, the one-end marking machine makes a reference point M and / or a defective marking G on the non-coated portion 11 of the first electrode lane.

[0111] When two first marking machines 20 (one side end marking machine and the other side end marking machine) are installed on both side ends of a multi-lane electrode, the one side end marking machine 20A and the other side end marking machine 20B perform reference point M and / or defect marking on the non-coated portion 11 of the first electrode lane and the non-coated portion 11 at the outer end of the eighth electrode lane. In this case, defect marking can be performed on either the non-coated portion 11 of the first electrode lane or the non-coated portion 11 at the outer end of the eighth electrode lane, or defect marking can be selectively performed on only one of the two non-coated portions 11.

[0112] When the reference point marking position and the marking position of the defective portion or defective section are different, the control unit 40 can control the first marking machine 20 to perform the reference point marking and the defect marking, respectively.

[0113] However, when the reference point marking position overlaps with the marking position of a defective part or defective section, the control unit 40 may control the first marking machine 20 to give priority to the defective marking G. In this case, the first marking machine 20 performs only the defective marking without marking a reference point at the marking position. Since a plurality of reference points M are marked at a predetermined interval along the longitudinal direction of the electrode, even if the reference point M is not marked at the position due to the defective marking, a roll map can be created by grasping the reference point positions (coordinates) before and after it and the interval between the reference points.

[0114] If necessary, the control unit 40 may control the first marking machine 20 to avoid the defective marking position and mark the reference point M before and after the defective marking position. In this case, the reference point M is marked at a position other than the original marking position. However, the control unit 40 may grasp the position of the reference point that is normally marked and the position of the reference point that is changed to the defective marking and the interval between the reference point and other reference points. Thus, the control unit 40 or a roll map generating unit connected to the control unit 40 may reflect this when managing the subsequent process or creating a roll map. Alternatively, the control unit 40 may display the reference points on the screen at regular intervals through suitable coordinate correction with reference to the positions and intervals of the reference points that are actually marked.

[0115] In short, according to the present invention, whether the reference points M are marked at a predetermined interval or the interval between specific reference points M changes due to the presence of a defect, as long as the longitudinal coordinate of the marked position can be identified, the control unit 40 or the roll map generation unit can correct the coordinate as much as necessary to perform process management or create a roll map.

[0116] <Role map generator> FIG. 11 is a schematic diagram of a role map generator according to another aspect of the present invention, FIG. 12 is a schematic diagram of a data visualization device included in the role map generator, and FIG. 13 is a schematic diagram showing role maps of a multi-lane electrode and individual electrode lanes generated by the role map generator of the present invention.

[0117] The roll map generating device 400 of the present invention includes a position measuring device 50 that acquires the longitudinal position of the multi-lane electrode as coordinate data according to the amount of rotation of the unwinder UW or the rewinder RW when the multi-lane electrode moves in a roll-to-roll state between the unwinder UW and the rewinder RW, marking machines 20 and 30 that work in conjunction with the position measuring device to mark reference points M at predetermined intervals on the multi-lane electrode along the longitudinal direction of the multi-lane electrode, and a roll map generating device that works in conjunction with the position measuring device and the marking machine to acquire the longitudinal position of the electrode and the coordinate data of the reference points M, and and a roll map generating unit 80 that generates a roll map by displaying the coordinate data on a roll map that resembles an electrode moving in a roll-to-roll state, and the marking machine includes a first marking machine 20 that marks a reference point M on a non-coated portion 11 of an electrode lane located at one end or both ends of a width direction of the multi-lane electrode, and a second marking machine 30 that moves along the width direction and marks a reference point M on the non-coated portion 11 of the remaining electrode lanes excluding the electrode lane located at the one end or the remaining electrode lanes excluding the electrode lanes located at both ends.

[0118] Since the multi-lane electrode 10 moves due to the rotation of the unwinder UW and the rewinder RW, the longitudinal position of the electrode 10 can be identified according to the amount of rotation of the unwinder UW or the rewinder RW. The position measuring device 50 can acquire such a longitudinal position of the electrode 10 as coordinate data. For example, if the coordinate acquired by the position measuring device 50 is 0, the start end of the electrode 10 can be identified, and if a coordinate of 1200 meters is acquired for an electrode 10 that is 1200 meters long, the end end of the electrode 10 can be identified.

[0119] The coordinate data of the longitudinal position of the electrode 10 can be detected by rotary encoders 50U, 50R installed on the unwinder UW or rewinder RW. Usually, the rotary encoders 50U, 50R are installed in a motor drive unit that drives the unwinder UW and rewinder RW, and can detect the moving distance of the electrode according to the number of rotations (amount of rotation) of the motor. Therefore, when the electrode 10 moves between the unwinder UW and the rewinder RW, the moving distance can be detected by the rotary encoders 50U, 50R.

[0120] The marking machine may be the first marking machine 20 and the second marking machine 30 employed in the above-mentioned reference point marking devices 100, 200, and 300. The first marking machine and the second marking machine may be linked to the position measuring device 50 directly or via the control unit 40, and may mark the reference points M on each electrode lane at a predetermined interval along the longitudinal direction of the multi-lane electrode.

[0121] The marking machine includes a first marking machine 20 for marking a reference point M on a non-coated portion 11 of an electrode lane located at one or both ends in the width direction of the multi-lane electrode, and a second marking machine 30 for moving along the width direction and marking a reference point M on the non-coated portion 11 of the remaining electrode lanes excluding the electrode lane marked by the first marking machine 20. As described above, the marking machine of the present invention can significantly reduce the equipment and costs required for marking the reference point M on a plurality of electrode lanes.

[0122] The present invention includes a roll map generator 80 that works in conjunction with the position measuring device 50 and the marking machines 20, 30 to obtain coordinate data of the longitudinal position of the electrode and the reference point M, and displays the coordinate data on a roll map to generate a roll map.

[0123] The roll map generating unit 80 can obtain coordinate data along the longitudinal direction of the multi-lane electrode in cooperation with the position measuring device, and can also represent the positions and intervals of the reference points M as coordinate data in cooperation with the marking machine. The coordinate data of the reference points M can be transmitted to the roll map generating unit 80 directly from the marking machine or via the control unit 40.

[0124] The roll map generation unit 80 can generate a roll map of the multi-lane electrode and a roll map of each individual electrode lane that constitutes the multi-lane electrode based on the coordinate data of the reference point M marked by the first marking machine and the second marking machine.

[0125] Furthermore, 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 that inspects multi-lane electrodes to obtain inspection data on defects and that can obtain electrode coordinate data on defective points and / or defective sections from which the inspection data is obtained in conjunction with the position measuring device may be disposed in front of the position of the first marking device 20. The types of the defect inspectors 60, 70 have been described above, so further description will be omitted.

[0126] As described above, the first marking machine 20 may mark defective points and / or defective sections on the non-coated portion 11 at one or both ends in the width direction of the multi-lane electrode based on the coordinate data transmitted from the defect inspection machines 60 and 70. The roll map generating unit 80 may display both the coordinate data of the reference point M and the coordinate data of the defective points and / or defective sections on a roll map.

[0127] The roll map generating unit 80 may include a database 81 that stores data acquired from the defect inspection machines 60 and 70, the marking machines 20 and 30, and the position measuring device 50, 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.

[0128] The roll map generating unit 80 includes a visualization device 83 that defines a visualization area forming a roll map simulating the electrode 10 and displays coordinate 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 coordinate data according to instructions from the central processing unit.

[0129] Referring to FIG. 12, the visualization device 83 includes an acquired data input unit 83a, a roll map coordinate grasping unit 83b, and an image generating unit 83c.

[0130] The acquired data input unit 83a receives and inputs data from the central processing unit 82.

[0131] The roll map coordinate grasping unit 83b may define a visualization area forming the roll map and define pixel coordinate values ​​within 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 longitudinal and width direction position data of the electrode 10 described above.

[0132] 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 onto the visualization area (roll map) based on pixel coordinates.

[0133] 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 (coordinates on the roll map) corresponding to each position data of the actual electrode 10 in a visualization area called a roll map in a display unit with a pattern, shape, and color designated for each data, and embodied on the roll map, thereby generating the roll map of the present invention.

[0134] Also, based on data stored in a storage unit such as a 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 in comparison with normal data stored in the database 81, distinguishing it from other data.

[0135] 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.

[0136] 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.

[0137] The roll map generating device 400 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.

[0138] The roll map generating apparatus 400 of the present invention may include a control unit 40 (PLC control unit) for controlling movement of the electrodes between the unwinder UW and the rewinder RW. In this case, the control unit 40 may be connected to the position measuring device 50 and the defect inspectors 60, 70, and may transmit the electrode positions and coordinate 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 coordinate 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.

[0139] Referring to FIG. 13, there is shown a roll map of a multi-lane electrode and an individual electrode lane generated by the roll map generator of the present invention.

[0140] FIG. 13 simultaneously shows roll maps for the top and bottom surfaces of the four electrode lanes.

[0141] The roll map shows that the position of the reference point M is shifted rearward in the longitudinal direction from lane 1 to lane 4. This is because, when the second marking machine 30 moves along the width direction while marking, it marks sequentially along a diagonal path that is inclined rearward in the longitudinal direction depending on the moving speed of the electrode, as shown in Figures 5 and 8.

[0142] Also, the roll map displays defective parts or defective sections by the defect inspection machine. As described above, the defect inspection machine linked to the position measuring device transmits inspection data and coordinate 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 parts and / or defective sections at the corresponding coordinate positions on the roll map based on the data. The marking of the defects can be performed by the first marking machine 20 as described above.

[0143] 13, the roll map generating unit 80 of the present invention can display the coordinate data of the reference point M and the coordinate data of the defective portion and / or defective section on a roll map. Therefore, in the electrode process, data related to the reference point M, electrode loss, quality, and defects can be visually and easily grasped at a glance.

[0144] As described above, when the reference point position or spacing of the roll map of the multi-lane electrode or the roll map of each individual electrode lane varies due to a defect or the like, the coordinate data can be suitably corrected by comparing it with the basic data stored in the control unit or the roll map generation unit.

[0145] In addition, the roll map produced in the first process can be referred to in the subsequent second and third processes, and if the length of the actual electrode changes or a defect occurs during subsequent processing, the roll map of the first process can be corrected to generate roll maps for the second and third processes.

[0146] Referring to FIG. 13, it is shown that the roll map of lane 2 was generated in the slitting process by referring to the roll map of lane 2 in the roll press process.

[0147] As described above, according to the present invention, since the reference points can be marked on the multi-lane electrode with a simple configuration, the marking process and costs can be significantly reduced. In addition, since the reference points can be marked and the defects can be marked at the same time, the defects of the electrode can be easily found.

[0148] 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.

[0149] 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]

[0150] 10: Multi-lane electrode 11: Non-coated part 12: Coating section M:Reference point M1, M1': 1st reference point M2, M2': 2nd reference point M3, M3': 3rd reference point 20: First marking machine 20A: One-side end marking machine 20B: Other end marking machine 30: Second marking machine R: Guide shaft 40: Control unit 50: Position measuring device C: Coater D: Electrode oven 60, 70: Defective inspection machine G: Defective marking 100, 200, 300: Reference point marking device 80: Role map generator 81: Database 82: Central Processing Unit 83: Visualization device 90: Display section 400: Role map generator

Claims

1. A marking device for marking a reference point on a multi-lane electrode having a plurality of electrode lanes arranged along a width direction, comprising: a first marking device for marking reference points on non-coated portions of the electrode lanes located at one or both ends in the width direction of the multi-lane electrode; a second marking device that moves along the width direction and marks reference points on non-coated portions of the remaining electrode lanes except for the electrode lanes located at the one end or the remaining electrode lanes except for the electrode lanes located at both ends; A control unit that controls the operation of the first marking machine and the second marking machine.

2. the first marking device includes a one-side end marking device configured to mark a reference point on a non-coated portion of an electrode lane located at one side end in the width direction of the multi-lane electrode, The reference point marking device of claim 1 , wherein the second marking machine marks the reference points on the non-coated portions of the plurality of electrode lanes except for the electrode lane located at the one side end.

3. the first marking device includes a one-side end marking device and an other-side end marking device for marking reference points on non-coated portions of electrode lanes located at one side end and the other side end in the width direction of the multi-lane electrode, respectively; 2. The reference point marking device of claim 1, wherein the second marking machine marks the reference point on an uncoated portion of one or more electrode lanes arranged between the electrode lanes located at the one side end and the other side end.

4. a guide shaft is disposed on the multi-lane electrode along the width direction of the multi-lane electrode; The first marking machine and the second marking machine are coupled to the guide shaft; The reference point marking device according to claim 1 , wherein the second marking machine is movably installed along the guide axis.

5. The reference point marking device according to claim 4 , wherein the first marking device is movable in the width direction along the guide shaft in response to a change in width when marking reference points on multi-lane electrodes having different widths.

6. 6. The reference point marking device according to claim 1, wherein when the multi-lane electrode moves along the longitudinal direction, the first marking machine and the second marking machine mark reference points on the uncoated portions of each electrode lane at predetermined intervals along the longitudinal direction of the multi-lane electrode.

7. 7. The reference point marking device according to claim 6, wherein a marking path when the second marking machine moves along the width direction and marks each of the plurality of electrode lanes is formed as a diagonal path that is inclined backward in the longitudinal direction of the electrode depending on a moving speed of the multi-lane electrode in the longitudinal direction.

8. The multi-lane electrode is a double-sided electrode having an electrode active material coated on both the upper and lower surfaces, The reference point marking device according to claim 1 , wherein the first marking device and the second marking device are respectively installed on an upper surface and a lower surface of the multi-lane electrode.

9. The reference point marking device of claim 1, wherein the marked reference points include coordinates of the reference points or sequence information of the reference points along the longitudinal direction of the multi-lane electrode, and sequence information of each electrode lane along the width direction of the multi-lane electrode.

10. a position measuring device that obtains, as coordinate data, a longitudinal position of the electrode according to an amount of rotation of the unwinder or the rewinder when the multi-lane electrode moves in a roll-to-roll state between the unwinder and the rewinder along the longitudinal direction, The reference point marking device according to claim 1 , wherein the first marking machine and the second marking machine mark the reference points based on the coordinate data.

11. The reference point marking device according to claim 10, wherein the first marking machine performs marking of defective points and / or defective sections of a multi-lane electrode instead of or in addition to the reference point marking.

12. At least one defect inspection machine is disposed in front of the first marking machine, the defect inspection machine inspecting the multi-lane electrodes moving in a roll-to-roll manner to obtain inspection data related to defects, and the defect inspection machine is linked with the position measuring device to obtain coordinate data of electrodes related to the defective points and / or defective sections from which the inspection data is obtained; The reference point marking device of claim 11, wherein the first marking machine marks defective locations and / or defective sections on non-coated portions at one or both ends of the width direction of the multi-lane electrode based on coordinate 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 first marking machine based on a distance between the defect inspection machine and a first marking machine and a moving speed of the multi-lane electrode; The reference point marking device according to claim 12, further comprising a control unit for controlling the first marking machine to mark the defective portion and / or the defective section at the time of arrival.

14. a position measuring device that acquires, as coordinate data, a longitudinal position of the multi-lane electrode according to an amount of rotation of the unwinder or the rewinder when the multi-lane electrode moves between an unwinder and a rewinder in a roll-to-roll state; a marking device that marks reference points at predetermined intervals on the multi-lane electrode along the longitudinal direction of the multi-lane electrode in cooperation with the position measuring device; a roll map generating unit that, in cooperation with the position measuring device and the marking machine, acquires coordinate data of the position in the longitudinal direction of the electrode and a reference point, and generates a roll map by displaying the coordinate data on a roll map that imitates an electrode moving in a roll-to-roll state, The marking machine includes a first marking machine that marks reference points on non-coated portions of electrode lanes located at one end or both ends in a width direction of the multi-lane electrode, and a second marking machine that moves along the width direction and marks reference points on non-coated portions of remaining electrode lanes excluding the electrode lane located at the one end or remaining electrode lanes excluding the electrode lanes located at both ends, A roll map generating device in which the roll map generation unit generates a roll map of the multi-lane electrode and a roll map of each individual electrode lane that constitutes the multi-lane electrode based on coordinate data of reference points marked by the first marking machine and the second marking machine.

15. At least one defect inspection machine is disposed in front of the first marking machine, the defect inspection machine inspecting the multi-lane electrodes to obtain inspection data related to defects and, in cooperation with the position measuring device, obtaining coordinate data of electrodes related to the defective points and / or defective sections from which the inspection data is obtained; the first marking machine marks defective portions and / or defective sections on non-coated portions at one or both ends of the multi-lane electrode in the width direction based on the coordinate 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 coordinate data of the reference point and the coordinate data of the defective portion and / or the defective section on a roll map.

16. A multi-lane electrode in which active material coated portions and active material non-coated portions are repeatedly arranged along the width direction, a first reference point marked on an uncoated portion of one or both ends of the multi-lane electrode in the width direction; and a second reference point marked on an uncoated portion of a remaining electrode lane of the multi-lane electrode where the first reference point is not marked.

17. The multi-lane electrode of claim 16 , wherein the first and second reference points are located in the uncoated portion of each electrode lane at predetermined intervals along the length of the multi-lane electrode.

18. The multi-lane electrode of claim 16 , wherein the reference points include sequence information of each electrode lane and coordinates of the reference points along the longitudinal direction of the multi-lane electrode or sequence information of the reference points.

19. The multi-lane electrode of claim 16 , further comprising a marking portion for defective locations and / or defective sections in the non-coated portion at one or both ends of the multi-lane electrode in the width direction.

20. A roll map simulating a multi-lane electrode in which a coated portion coated with an active material and a non-coated portion not coated with an active material are repeatedly arranged along the width direction, 1) Coordinate data relating to the longitudinal position of the multi-lane electrode; 2) a plurality of reference points marked on the non-coated portion of each electrode lane at predetermined intervals along the longitudinal direction of the multi-lane electrode; 4) coordinate data of the reference point; 5) Marking portions of defective locations and / or defective sections of the multi-lane electrodes and coordinate data of the marking portions; A role map of a multi-lane electrode, comprising at least one of:

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