Electrode marking device and roll map creation system

Abstract

The present invention relates to a marking device for an electrode moving between an unwinder and a rewinder. The marking device includes a position measuring device for acquiring a position of the electrode according to a rotation amount of the unwinder or the rewinder as a coordinate value along the electrode longitudinal direction, at least one defect inspection device for inspecting the electrode to identify a defect and for acquiring the coordinate value of the defect along the electrode longitudinal direction by being connected to the position measuring device, a marking device installed behind the defect inspection device along the electrode moving direction, and a control unit for comparing a real-time relative position value of the marking device with respect to the moving electrode and the coordinate value of the defect, and the marking device marks the defect on the electrode according to a defect marking signal from the control unit. The present invention also provides a roll map creation system using the above electrode marking device.

Description

[Technical field]

[0001] The present invention relates to an electrode marking device, and more particularly to an electrode marking device that can mark defects on an electrode more accurately regardless of the electrode moving speed by comparing a real-time relative position value of a marking machine with respect to an electrode with the coordinate value of the defect.

[0002] The present invention also relates to a roll map creation system using such an electrode marking device.

[0003] This application claims the benefit of priority based on Korean Patent Application No. 10-2022-0127182 dated October 5, 2022, and all contents disclosed in the documents of said Korean patent application are incorporated herein by reference. [Background technology]

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

[0005] The electrode manufacturing process for manufacturing electrodes for lithium secondary batteries includes 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, a slitting process in which the rolled electrodes are cut to size, and a notching process in which tabs are formed on the electrodes.

[0006] After the tabs are formed in the notching process, a separator is inserted between the positive and negative electrodes to form an electrode assembly, which is then stacked or folded, 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, completed secondary battery.

[0007] FIG. 1 shows the state of an electrode undergoing such an electrode manufacturing process.

[0008] A coated electrode 1 is manufactured by coating a current collector with an electrode active material using a coater to form a coated portion 1a. A reference point may be marked on the uncoated portion 1b of the current collector that is not coated with the electrode active material. The electrode active material is usually coated on both the front and back surfaces of the electrode 1. The coated electrode 1 is pressed by a press roll in a roll press process, and cut along the length of the electrode 1 by a slitter in a slitting process. Thereafter, the electrode tab 2 is formed by punching using a press or the like in a notching process. In the notching process, the electrode tab 2 is formed for each unit electrode so that it can be cut for each unit electrode to be manufactured into a battery cell, or cut in a subsequent process. The width of the unit electrode corresponds to the pitch P (pitch) processed by the press.

[0009] The electrode manufacturing process is performed through a series of roll-to-roll processes in which the electrode unwound from the unwinder is moved and wound by the rewinder is sequentially repeated. That is, the electrode is coated while moving from the unwinder of the coating process to the rewinder, and the electrode is wound on the rewinder to complete the electrode roll of the coating process. Next, the electrode roll is attached to the unwinder of the roll press process and moved to the rewinder of the roll press process. The electrode roll is wound on the rewinder of the roll press process to complete the electrode roll of the roll press process. Thereafter, the electrode roll moves again in a roll-to-roll state from the unwinder of the subsequent process (e.g., the second roll press process, the slitting process, or the notching process, etc.) and is wound on the rewinder of the subsequent process to complete the electrode roll of the subsequent process. In this way, the electrode manufacturing process is composed of a series of roll-to-roll processes in which the electrode unwound from the unwinder is moved and wound on the rewinder (roll-to-roll process) is sequentially repeated.

[0010] FIG. 2 shows a roll map RM in the electrode manufacturing process.

[0011] As described above, the electrode proceeds in a roll-to-roll state in the coating process, roll press process, slitting process, etc. The roll map RM is a bar diagram that represents the progress of the electrode, and the longitudinal and transverse positions of the electrode are indicated by coordinates on the roll map. The roll map RM shows information on defects, quality, electrode breakage, etc. that occur in the electrode manufacturing process together with the coordinates, making it easy to visually grasp data on quality and defects in the electrode manufacturing process at a glance.

[0012] Referring to Figure 2, visual defect information such as pinhole defect f1 and line defect f2 is visually displayed at the coordinates where the defect occurred. Also displayed is a mismatch portion f3 between the coated and uncoated portions. Other loading amount defects are also displayed, and the portion where the electrode was discarded at the outermost shell is also shown. Such a roll map can be created for each of the detailed processes described above.

[0013] Meanwhile, the coordinate values ​​of the defective part on the electrode moving in a roll-to-roll state can be detected by various inspection machines or measuring instruments. In addition, a marking machine marks the defective part on the electrode based on the detected coordinate values. For example, the time when the defective part arrives at the marking machine can be calculated based on the distance between the defect inspection machine and the marking machine and the moving speed of the electrode, and the marking machine can mark the defective part at the time of arrival.

[0014] However, the electrode being moved may be subjected to shocks due to vibrations of the electrode transfer line or pressure from the press roll. In such cases, the electrode moving speed may not be constant but may vary. In particular, when the electrode transfer line is broken and the electrode movement is stopped, and the broken electrode is reconnected and then moved again, the electrode moving speed will naturally change during the process of stopping and restarting the transfer line. If the electrode moving speed changes in this way, the time at which the defective part arrives at the marking machine may also differ from the set time. As a result, the position of the defective part that the marking machine actually marks on the electrode may differ from the coordinate value detected by the inspection machine.

[0015] If the defective portion cannot be accurately marked at the coordinate position detected by the inspection machine and the marking position varies, there is a risk that a non-defective electrode portion will be removed when removing the defective portion at the marking position in a subsequent process.

[0016] Furthermore, when defects are represented on a roll map with reference to the markings, the positions of the defects on the actual electrode may differ from the positions of the defects on the roll map. This reduces the reliability of the roll map, which provides detailed information on quality and defects. When a subsequent process is carried out with reference to information on an unreliable roll map, errors may occur during the subsequent process due to deviations between the positions of normal and defective parts of the electrode. Furthermore, when tracing back the cause of a problem occurring in a secondary battery with reference to defect data on the roll map, it is difficult to accurately analyze the cause of the problem due to position errors of the defective parts. [Prior art documents] [Patent documents]

[0017] [Patent Document 1] Korean Patent Publication No. 10-2022-0051699 Summary of the Invention [Problem to be solved by the invention]

[0018] The present invention relates to an electrode marking device that can accurately mark defective parts of an electrode by comparing real-time relative position values ​​of a marking machine with respect to an electrode with coordinate values ​​of the defective parts.

[0019] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide an electrode marking device capable of efficiently marking defective parts or defective sections even in the case of an electrode having a plurality of electrode lanes.

[0020] Another object of the present invention is to provide a roll map creation system that can accurately display information regarding electrode defects on a roll map using the above-mentioned electrode marking device. [Means for solving the problem]

[0021] In order to solve the above problems, the electrode marking device of the present invention is a marking device for an electrode moving between an unwinder and a rewinder, and includes a position measuring device that acquires a position of the electrode according to an amount of rotation of the unwinder or the rewinder as a coordinate value along a longitudinal direction of the electrode, at least one defect inspection machine that inspects the electrode to identify a defective part and is connected to the position measuring device to acquire the coordinate value of the defective part along the longitudinal direction of the electrode, a marking machine installed behind the defect inspection machine along the moving direction of the electrode, and a control unit that compares a real-time relative position value of the marking machine with respect to the moving electrode and the coordinate value of the defective part to decide whether to mark or not, and the marking machine can mark the defective part on the electrode in response to a defect marking signal from the control unit.

[0022] The coordinate value of the defect may be a value obtained by adding a first offset distance, which is a distance between the defect inspector and the rewinder, to the electrode winding amount of the rewinder at the time when the defect is detected by the defect inspector.

[0023] Furthermore, the defect inspection machine can obtain the position of the defect portion along the electrode width direction as a coordinate value along the electrode width direction.

[0024] The real-time relative position value of the marking machine is a value obtained by adding a second offset distance, which is the distance between the marking machine and a rewinder, to the electrode winding amount at the time when the electrode passes through the marking machine in real time, and the control unit can output a defect marking signal to the marking machine at the moment when the real-time relative position value becomes larger than the coordinate value of the defective part.

[0025] the control unit includes an electrode travel control unit that controls movement of the electrode from the unwinder to the rewinder and is connected to the position measuring device to obtain information on the electrode winding amount of the rewinder, and a marking machine control unit that determines whether to perform marking by the marking machine, The marking machine control unit may add the second offset distance to the electrode winding amount received from the electrode travel control unit to calculate a real-time relative position value of the marking machine, and may output a fault marking signal to the marking machine at the moment when the calculated real-time relative position value becomes greater than the coordinate value of the faulty part.

[0026] The defect inspection machine may obtain coordinate values ​​of the defective part by adding a first offset distance, which is the distance between the inspection machine and the rewinder, to the electrode winding amount received from the electrode travel control unit, and may transmit the obtained coordinate values ​​of the defective part to the marking machine control unit.

[0027] In one embodiment of the electrode marking device, the defective portion is a defective section in which defective points continue continuously or intermittently along the electrode, the defect inspection machine acquires start and end coordinate values ​​of the defective section along the longitudinal direction of the electrode, the control unit compares a real-time relative position value of the marking machine with respect to the moving electrode and the start and end coordinate values ​​of the defective section, respectively, to determine whether or not to start and end marking, and the marking machine can mark on the electrode along the defective section in response to signals instructing the start and end of marking from the control unit.

[0028] The start coordinate value of the defective section may be a value obtained by adding a first offset distance, which is the distance between the defect inspector and the rewinder, to the electrode winding amount of the rewinder at the time when the first defect point of the defective section is detected by the defect inspector, and the end coordinate value of the defective section may be a value obtained by adding the first offset distance to the electrode winding amount of the rewinder at the time when the last defect point of the defective section is detected by the defect inspector.

[0029] the real-time relative position value of the marking machine is a value obtained by adding a second offset distance, which is a distance between the marking machine and the rewinder, to the electrode winding amount at the time when the electrode passes through the marking machine in real time; The control unit may output a fault marking signal to the marking machine at the moment the real-time relative position value becomes greater than a start coordinate value of the faulty section, and may block the output of the fault marking signal to the marking machine at the moment the real-time relative position value becomes greater than an end coordinate value of the faulty section.

[0030] the control unit includes an electrode travel control unit that controls movement of the electrode from the unwinder to the rewinder and is connected to the position measuring device to obtain information on the electrode winding amount of the rewinder, and a marking machine control unit that determines whether to perform marking by the marking machine, the marking machine control unit calculates a real-time relative position value of the marking machine by adding the second offset distance to the electrode winding amount received from the electrode travel control unit; In addition, the marking machine control unit outputs a fault marking signal to the marking machine at the moment when the calculated real-time relative position value becomes greater than the start coordinate value of the faulty section, and blocks the output of the fault marking signal to the marking machine at the moment when the real-time relative position value becomes greater than the end coordinate value of the faulty section.

[0031] The defect inspection machine may add a first offset distance, which is the distance between the inspection machine and the rewinder, to the electrode winding amount received from the electrode travel control unit to obtain start and end coordinate values ​​of the defective section, and transmit the obtained start and end coordinate values ​​of the defective section to the marking machine control unit.

[0032] The electrode includes a plurality of electrode lanes along a width direction, and the marking devices are arranged for each electrode lane, and each marking device can continuously mark along a defective section of each electrode lane in response to a signal from the control unit instructing the start and end of marking.

[0033] According to another aspect of the present invention, a roll map creation system includes a position measuring device that obtains a position of an electrode according to an amount of rotation of an unwinder or a rewinder as a coordinate value along a longitudinal direction of the electrode when the electrode moves between an unwinder and a rewinder, at least one defect inspection machine that inspects the electrode to identify a defective part and is connected to the position measuring device to obtain the coordinate value of the defective part along the longitudinal direction of the electrode, a marking machine that is installed behind the defect inspection machine along the electrode movement direction and that marks the defective part on the electrode in response to a defect marking signal from a control unit, and a marking machine that performs a marking operation on the electrode when the electrode moves. a control unit that outputs a defect marking signal to the marking machine at the moment when a real-time relative position value of the marking machine becomes larger than a coordinate value of the defective part, and acquires the real-time relative position value of the marking machine at the time when the defect marking signal is output as a marking coordinate; and a roll map creation unit that creates a roll map defined as a coordinate plane having two coordinate axes, a longitudinal axis and a width axis of the electrode, and in which a position of the moving electrode is displayed by coordinate values ​​of the coordinate plane, and the roll map creation unit can represent the defective part on the roll map based on the marking coordinates received from the control unit.

[0034] A roll map creation system according to another embodiment of the present invention includes a position measuring device that obtains a position of the electrode according to an amount of rotation of the unwinder or rewinder as a coordinate value along a longitudinal direction of the electrode when the electrode moves between the unwinder and the rewinder, at least one defect inspection device that inspects the electrode to identify a defective section and is connected to the position measuring device to obtain a start coordinate value and an end coordinate value of the defective section along the longitudinal direction of the electrode, a marking device that is installed behind the defect inspection device along the electrode movement direction and that marks the electrode along the defective section in response to a signal instructing a start and end of marking from a control unit, and a real-time relative position value of the marking device with respect to the moving electrode that is greater than the start coordinate value of the defective section. a control unit that outputs a defective marking signal to the marking machine when the real-time relative position value becomes larger than the end coordinate value of the defective section, and blocks output of the defective marking signal when the real-time relative position value becomes larger than the end coordinate value of the defective section, and acquires real-time relative position values ​​of the marking machine at the time of outputting and blocking the defective marking signal as a marking start coordinate and a marking end coordinate, respectively; and a roll map creation unit that creates a roll map defined as a coordinate plane having two coordinate axes, a longitudinal axis and a width axis of the electrode, and in which a position of the moving electrode is displayed by coordinate values ​​of the coordinate plane, and the roll map creation unit can display the defective section on the roll map based on the marking start coordinate and the marking end coordinate received from the control unit.

[0035] The electrode includes a plurality of electrode lanes along a width direction, and the marking machines are arranged for each electrode lane, and each marking machine continuously marks along a defective section of each electrode lane in response to a signal from the control unit instructing a start and end of marking, and the roll map creation unit can represent the defective section of each electrode lane on a roll map representing each electrode lane. Effect of the Invention

[0036] According to the present invention, by comparing the real-time relative position value of the marking machine with respect to the electrode and the coordinate value of the defective part or section of the electrode, it is possible to accurately mark the defective part or section of the electrode regardless of the electrode moving speed.

[0037] In addition, even in the case of an electrode having a plurality of electrode lanes, it is possible to efficiently mark a defective section. In particular, even when coordinate signals related to defective sections are received overlappingly in a plurality of electrode lanes, it is possible to easily perform marking for identifying defects for each electrode lane.

[0038] In addition, by using the electrode marking device according to the present invention, it is possible to obtain a reliable roll map in which coordinate information of defective parts or defective sections is accurately displayed. [Brief description of the drawings]

[0039] [Figure 1] 3A to 3C are schematic diagrams showing the state of an electrode during an electrode manufacturing process. [Diagram 2] 1 shows an example of a roll map in an electrode manufacturing process. [Diagram 3] 1 is a schematic diagram of an electrode marking device according to a first embodiment of the present invention. [Figure 4] FIG. 4 is a schematic diagram showing a first offset distance and a second offset distance. [Diagram 5] 1 is a schematic diagram showing a configuration of a marking machine according to the present invention; [Figure 6] FIG. 1 is a schematic diagram of a role mapping system of the present invention. [Figure 7] FIG. 4 is a schematic diagram illustrating an example of a role map creation unit. [Figure 8] 2 is a schematic diagram of a role map created by the role map creation system of the present invention. FIG. [Figure 9] 1 is a schematic diagram showing a defective section of a multi-lane electrode to which a defective tag is attached; [Figure 10] FIG. 11 is a schematic diagram of a roll map created using an electrode marking device according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0040] 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 present invention, and the dimensions of some components may be exaggerated.

[0041] 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 this is not intended to limit the present invention to the specific disclosed forms, and it is understood that the present invention includes all modifications, equivalents, and alternatives falling within the spirit and technical scope of the present invention.

[0042] (First embodiment) <Electrode marking device> FIG. 3 is a schematic diagram of an electrode marking device according to a first embodiment of the present invention, FIG. 4 is a schematic diagram showing a first offset distance and a second offset distance, and FIG. 5 is a schematic diagram showing the configuration of a marking machine according to the present invention.

[0043] The electrode marking device 100 of the present invention is a marking device for an electrode 1 moving between an unwinder UW and a rewinder RW, and includes a position measuring device 10 that acquires the position of the electrode 1 according to the amount of rotation of the unwinder UW or the rewinder RW as a coordinate value along the longitudinal direction of the electrode, at least one defect inspection device 20 that inspects the electrode 1 to identify defective parts and is connected to the position measuring device 10 to acquire the coordinate value of the defective part along the longitudinal direction of the electrode, a marking device 30 installed behind the defect inspection device 20 along the electrode movement direction, and a control unit 40 that compares the real-time relative position value of the marking device 30 with respect to the moving electrode 1 and the coordinate value of the defective part to decide whether or not to mark.

[0044] The present invention is an electrode marking device 100 for marking defective portions on an electrode 1 moving in a roll-to-roll state between an unwinder UW and a rewinder RW.

[0045] The electrode 1 includes a covered portion 1a coated with an electrode active material and an uncovered portion 1b where the active material is not coated and the surface of the current collector is exposed. The electrode 1 may include only one electrode lane along the width direction of the current collector, or may include two or more electrode lanes. An electrode having a plurality of electrode lanes is called a multi-lane electrode. The electrode marking device 100 of the present invention may also be applied to a multi-lane electrode. In the case of a multi-lane electrode, the uncovered portion 1b and the covered portion 1a are repeatedly arranged along the electrode width direction. A marking machine 30, which will be described later, marks defective portions or defective sections on the uncovered portion 1b of the electrode 1.

[0046] The electrode 1 may also be a cross-sectional electrode in which the active material is coated on only one of the front and back surfaces of the current collector. Alternatively, the electrode 1 may be a double-sided electrode in which the active material is coated on both the front and back surfaces of the current collector. The electrode marking device 100 of the present invention can inspect both the front and back surfaces of the double-sided electrode as well as the cross-sectional electrode and mark defective parts.

[0047] The electrode marking device 100 of the present invention can be applied to any process, such as the above-mentioned electrode coating process, roll pressing process, slitting process, notching process, etc., in which the electrode 1 moves in a roll-to-roll state between the unwinder UW and the rewinder RW, and the electrode 1 is inspected to determine whether any defects have been found.

[0048] 3 shows the electrode marking device 100 for marking defective parts in an electrode coating process, but the present invention is not limited thereto. That is, the electrode marking device 100 may mark defective parts in a roll press process, a slitting process, or the like.

[0049] The electrode marking device 100 of the present invention includes a position measuring device 10, a defect inspection machine 20, a marking machine 30, and a control unit 40.

[0050] In the roll-to-roll process, the electrode 1 is mounted between the unwinder UW and the rewinder RW. The electrode 1 is unwound from the unwinder UW, and in the case of the coating process, an active material is coated by a coater. After coating, defective parts are marked on the uncoated part 1b of the electrode 1. Since the electrode 1 moves due to the rotation of the unwinder UW and the rewinder RW, the longitudinal position of the electrode 1 can be specified according to the amount of rotation of the unwinder UW or the rewinder RW. The position measuring device 10 can obtain such a longitudinal position of the electrode 1 as a coordinate value along the longitudinal direction of the electrode. For example, in an electrode 1 having a length of 1200 meters, if the coordinate obtained by the position measuring device 10 is 0, it represents the start of the electrode 1, and if the coordinate of 1200 meters is obtained, it represents the end of the electrode 1. As the position measuring device 10, a rotary encoder 10U or 10R installed on the unwinder UW or the rewinder RW can be used. Usually, the rotary encoders 10U and 10R are installed in a motor driving unit that drives the unwinder UW and the rewinder RW, and can detect the electrode movement distance according to the number of rotations (amount of rotation) of the motor. Therefore, when the electrode 1 moves between the unwinder UW and the rewinder RW, the movement distance can be detected by the rotary encoders 10U and 10R. In FIG. 3, for convenience of explanation, the rotary encoder 10U of the unwinder and the rotary encoder 10R of the rewinder are shown to be disposed outside the unwinder UW and the rewinder RW, respectively, but the encoders can be built into the unwinder UW and the rewinder RW, respectively.

[0051] To obtain coordinate values ​​along the longitudinal direction, the rotary encoder 10U of the unwinder UW or the rotary encoder 10R of the rewinder RW may be used. However, the roll map described below may be created after the electrode 1 is completely wound on the rewinder RW and the electrode winding roll is completed, that is, after all coordinate data and inspection data along the electrode length are input. Therefore, it is preferable to use the rotary encoder 10R installed on the rewinder RW as the position measuring device 10 for creating the roll map. In this specification, electrode defect marking and roll map creation will be described based on coordinate values ​​obtained with the rewinder RW as a reference.

[0052] The amount of rotation of the unwinder UW described above is the same as the amount of electrode 1 wound around the unwinder UW, and the amount of rotation of the rewinder RW is the same as the amount of electrode 1 wound around the rewinder RW. In this embodiment, the coordinate values ​​of the electrode 1 are acquired based on the rewinder RW, so the position of the electrode 1 can be expressed by coordinate values ​​based on the amount of electrode winding (meters) wound around the rewinder RW.

[0053] The defect inspection machine 20 inspects the electrode 1 to identify a defective portion, and is connected to the position measuring device 10 to obtain the coordinate value of the defective portion along the longitudinal direction of the electrode.

[0054] The defect may be an appearance defect such as a pinhole defect, a line defect, etc. In this case, the defect inspection machine 20 may be an electrode appearance inspection machine (e.g., a vision camera). However, the defect referred to in this specification is not limited to a mere appearance defect. That is, if the conditions required according to the process are not met, such an electrode part may also be defective.

[0055] For example, if an electrode 1 breaks and is reattached with tape, the seam on such an electrode may also fail.

[0056] Alternatively, in the case of an electrode coating process, a defect may occur if the loading amount (coating amount) of the electrode active material is out of a set range. In this case, the loading amount measuring device may become a defect inspection device 20.

[0057] Alternatively, in the case of a roll press process, a defect may occur if the thickness of the electrode 1 rolled by the press roll falls outside a set range. In this case, the thickness measuring device may become the defect inspection device 20.

[0058] Or, an electrode may be defective if its size and width deviate from a set value. In this case, the size and width measuring device may be the defect inspection machine 20.

[0059] Such defective parts can be directly marked on the actual electrodes using the marking machine 30. Alternatively, defective parts can be visually represented by changing the color, brightness, saturation, and shape on the coordinates of a roll map, which will be described later.

[0060] Defective parts of the actual electrode can be marked on the uncovered part 1b of the electrode 1. However, since the roll map is a virtual coordinate plane representing the actual electrode, the defective part can be displayed directly at the position of the covered part 1a of the roll map that corresponds to the coordinate value of the defective part acquired by the electrode marking device 100 of the present invention.

[0061] The defective portion may occur sparsely in the form of spots along the longitudinal direction of the electrode, such as pinhole defects. In this case, the coordinate values ​​of the defective portion may be acquired, and the defective portion may be intermittently marked on the non-covered portion 1b at the electrode position.

[0062] The defective portion may be a long portion having a length, such as a line defect, or a defective section may be present along the length of the electrode 1, such as a loading amount defect or a rolling thickness defect, or may be an intermittent defect, such as a spot defect, which is densely spaced at close intervals.

[0063] In this way, in the case of a defective section in which the defective portions continue continuously or intermittently, the defect start coordinate value and the defect end coordinate value can be obtained and the defective section can be marked on the electrode.

[0064] This embodiment is based on the assumption that defective portions occur intermittently at intervals, such as spot defects.

[0065] As described above, the defect inspection machine 20 is not limited as long as it can inspect the defect and identify the defective part or defective section. Therefore, at least one or more of the defect inspection machines 20 are provided according to the type of defect. Also, when there are a plurality of electrode lanes, one defect inspection machine 20 may be provided corresponding to each electrode lane.

[0066] The defect inspection machine 20 is connected to the position measuring device 10 to obtain the coordinate value of the defect part along the longitudinal direction of the electrode. Referring to FIG. 3, the control unit 40 is connected to the position measuring device 10 of the unwinder UW or the rewinder RW. In this specification, each component constituting the electrode marking device 100 may be connected. The "connection" between such components means that data can be transmitted and received by wired or wireless communication. The defect inspection machine 20 may be connected to the position measuring device 10 via the control unit 40 as in this embodiment. Therefore, when the electrode 1 passes through the defect inspection machine 20, the defect inspection machine 20 inspects the electrode 1, and information on the electrode winding amount at the time of inspection may be transmitted in real time via the control unit 40 or directly from the position measuring device 10. When the defect inspection machine 20 finds a defect part, it may obtain the coordinate value of the defect part along the longitudinal direction of the defect part based on the electrode winding amount of the rewinder RW at that time.

[0067] In FIG. 3, when the defect inspection machine 20 inspects the electrode 1 and obtains data on the defective part, the position of the electrode part is detected by the position measuring device 10 of the rewinder RW. However, when the defect part is detected, the electrode part has not yet arrived at the rewinder RW. That is, the coordinate value of the defect part must be the coordinate value when the defect part actually arrives at the rewinder RW. Therefore, as shown in FIG. 4, the coordinate value of the defect part is a value obtained by adding a first offset distance A, A', which is the distance between the inspection machine and the rewinder RW, to the electrode winding amount of the rewinder RW at the time when the defect inspection machine 20 detects the defect part. The first offset distance A, A' may differ depending on the installation position of each inspection machine. As shown in FIG. 4, when the defect inspection machine 20 is an A inspection machine 20A (e.g., an electrode appearance inspection machine) and a B measuring machine 20B (e.g., a loading amount measuring machine), the first offset distance A of the A inspection machine 20A may be 15 m, and the first offset distance A' of the B measuring machine 20B may be 10 m.

[0068] Meanwhile, the defect inspection machine 20 can be classified into a spot inspection machine and a scan inspection machine according to the method of detecting defects.

[0069] The spot inspection machine identifies defective parts from the electrode images captured for each shooting frame. The spot inspection machine matches each shooting image with the electrode winding length (meters). This makes it possible to obtain the coordinates of the defective part by adding the first offset distance to the electrode winding length of the rewinder RW in the shooting frame in which the defective part is captured. For example, when the electrode winding length of the rewinder RW in the n-th shooting frame is 500.5 m and a pinhole defect occurs in the shooting image, the longitudinal coordinate value of the pinhole defect part is 515.5 m, which is obtained by adding the first offset distance, 15 m, to the winding length.

[0070] The scanning inspection machine is a defect inspection machine 20 that identifies a defective part from scan data obtained by scanning the electrode 1 at predetermined intervals. The longitudinal coordinate value of the defective part can be obtained by adding the first offset distance to the electrode winding amount of the rewinder RW at the time when the defective part is scanned.

[0071] On the other hand, the defect inspection machine 20 can obtain the position of the defect portion along the electrode width direction as a coordinate value along the electrode width direction.

[0072] Since the electrode 1 has a predetermined length and width, it can be expressed by a coordinate plane having two coordinate axes, a longitudinal axis and a width axis. A typical example of the above coordinate plane is a roll map described later. In the electrode marking device 100 of the present invention, the coordinate of the longitudinal axis, i.e., the coordinate value along the longitudinal direction of the electrode, is acquired by the position measuring device 10 described above. Meanwhile, the coordinate of the width axis, i.e., the coordinate value along the width direction of the electrode, can be acquired by the defect inspection device 20 described above. In the case of the spot inspection device described above, the width direction coordinate value of the defective part can be acquired from the photographed image taken for each photographed frame. For example, the photographed image can be divided horizontally and vertically at regular intervals, and the distance from the edge of the photographed image to the defective part can be measured to measure the width direction coordinate value. In addition, the size of the divided area can be calculated to obtain the size of the defective part. Since a program for detecting the size and position of the defective part from the photographed image is publicly known, further explanation of it will be omitted.

[0073] Alternatively, the scanning inspection machine may be provided with a program capable of scanning and inspecting the appearance of the electrode along the entire width direction of the electrode 1. When the scanning inspection machine moves along the electrode width direction, the electrode 1 moves in the longitudinal direction, so that, as described above, the scanning inspection machine can scan the electrode 1 along its entire width direction by a predetermined length at a time. The scanned data can be collected by the scanning inspection machine for tens or thousands of pieces or more along the longitudinal and transverse directions of the electrode 1. The width direction coordinate value of the defective part can be obtained from the scan data.

[0074] The width direction coordinate values ​​of the defective parts thus obtained are transmitted to the roll map creating unit 50 together with marking coordinates along the longitudinal direction by the marking machine 30 described later, and can be displayed in the coordinate space of the roll map.

[0075] Referring to FIG. 3, a marking machine 30 is provided behind the defect inspection machine 20 along the electrode movement direction.

[0076] In this embodiment, since it is assumed that a defective portion is marked on an electrode having one electrode lane, one marking machine 30 is installed. However, in order to mark a multi-lane electrode having multiple electrode lanes, multiple marking machines 30 may be installed corresponding to the number of electrode lanes.

[0077] The marking machine 30 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 marking point and does not damage the electrode 1. In the case of a laser type or punching type marking machine, care must be taken when marking because it may leave damage to the electrode 1.

[0078] An example of an ink marking machine is shown in Fig. 5. Referring to Fig. 5, the marking machine 30 includes a marking unit (nozzle unit) 31 connected to an ink supply unit (not shown). The marking machine 30 also includes a vision camera 32 so as to distinguish and recognize the coated portion 1a and the non-coated portion 1b. The vision camera 32 identifies the boundary between the coated portion 1a and the non-coated portion 1b so that the marking unit 31 can mark a predetermined position of the non-coated portion 1b. The ink marking machine 30 may include a lighting device 33 so that the vision camera 32 can easily distinguish the coated portion 1a and the non-coated portion 1b.

[0079] When the width of the electrode 1 varies depending on the type of electrode or the number of electrode lanes, the marking machine 30 may be movable to accommodate the variation. For example, the marking machine 30 may move in the electrode width direction along a guide axis R installed on the electrode.

[0080] As shown in FIG. 4, when the electrode 1 is a double-sided electrode, the defect inspection machine 20 and the marking machine 30 may be installed on the front and back sides of the electrode, respectively. The defect marking of the coating process is performed after the active material coating. FIG. 4 shows that both the front and back sides of the electrode are completely coated before the defect inspection and marking. FIG. 3 shows that the electrode marking device 100 of the present invention simultaneously marks the defect parts on the front and back sides of the electrode. However, this is for explaining the arrangement relationship between the marking machine 30 and the electrode 1, and in reality, the defect marking of the front and back sides of the electrode may proceed sequentially according to the layout of the factory equipment. For example, the electrode active material is first coated and dried on the front side of the electrode, and then the marking machine 30 may mark the defect parts on the front side, and the electrode continues to run and the electrode active material is coated and dried on the back side of the electrode, and then the marking machine 30 may mark the defect parts on the back side of the electrode. In this case, the marking machine 30 may be installed on the front and back sides of the electrode, respectively, according to the running path of the electrode to mark the defect parts. Alternatively, when the coating of the front and back surfaces of the electrode is performed sequentially, a single marking machine 30 may be configured to mark defects on both the front and back surfaces of the electrode.

[0081] The control unit 40 can compare the real-time relative position value of the marking machine 30 with respect to the electrode 1 moving between the unwinder UW and the rewinder RW with the coordinate value of the defective part to determine whether or not to mark the defective part.

[0082] In order to mark the defective part, the position of the marking machine 30 relative to the moving electrode 1 must be known. That is, in order for the marking machine 30 to immediately mark the defective part when it passes the marking machine 30, the real-time position of the marking machine 30 must be known. Of course, as shown in FIG. 3, the marking machine 30 is installed behind the defect inspection machine 20 in the electrode longitudinal direction and is installed at a predetermined distance (second offset distance C) from the rewinder RW. That is, the installation position of the marking machine 30 on the electrode line itself is fixed. Referring to FIG. 4, in this embodiment, the second offset distance C is 5 m.

[0083] As described above, the position of the marking machine 30 itself is fixed, but since the electrode 1 is continuously wound by the rewinder RW while passing under the marking machine 30, the relative position of the marking machine 30 with respect to the moving electrode 1 changes continuously. That is, the relative position value, which is the relative position of the marking machine 30 with respect to the electrode 1, changes in real time as the electrode 1 is wound. The control unit 40 of the present invention can determine whether to perform marking by grasping such a real-time relative position value of the marking machine 30 with respect to the electrode 1 and comparing it with the defective part coordinate value obtained by the defect inspection machine 20. From the above, it can be said that the real-time relative position value of the marking machine 30 is a function of the electrode winding amount at the time when the electrode 1 passes through the marking machine 30 in real time. However, the winding amount of the rewinder RW at the time when the electrode 1 passes through the marking machine 30 does not immediately mean the real-time relative position value of the marking machine 30. Since the marking machine 30 is separated from the rewinder RW by a second offset distance C, the real-time relative position value of the marking machine 30 is the electrode winding amount at the time when the electrode 1 passes through the marking machine 30 plus the second offset distance C.

[0084] The control unit 40 receives the electrode winding amount in real time from the position measuring device 10, and therefore always knows the electrode winding amount at the time of passing the marking machine 30. Therefore, the control unit 40 can also know the real-time relative position value of the marking machine 30 with respect to the electrode.

[0085] Specifically, the control unit 40 outputs a defect marking signal to the marking machine 30 at the moment when the real-time relative position value becomes greater than the coordinate value of the defective part. The marking machine 30 can mark the defective part on the electrode according to the defect marking signal from the control unit 40.

[0086] The moment when the real-time relative position value becomes larger than the coordinate value of the defective part means the moment when the defective part of the electrode passes the marking machine 30. That is, when the coordinate value of the defective part, which is the sum of the electrode winding amount of the rewinder RW and the first offset distance at the time when the defect is detected by the defect inspection machine 20, is 515.5 m, the marking machine 30 starts marking at the moment when the sum of the electrode winding amount of the rewinder RW and the second offset distance at the time when the defective part of the electrode passes the marking machine 30 becomes larger than 515.5 m. In this way, the present invention determines whether to mark by comparing the coordinate value of the defective part calculated based on the electrode winding amount with the real-time relative position value of the marking machine 30. Therefore, it is not necessary to consider the moving speed of the electrode in determining whether to mark. In addition, it is not affected even if the electrode moving speed changes due to the electrode 1 being broken or the broken electrode 1 being rejoined and the joined electrode 1 being moved again. That is, even if some event occurs during the movement of the electrode, the information on the amount of electrode winding by the rewinder RW can always be obtained consistently in proportion to the amount of rotation of the rewinder RW. Therefore, the marking device 30 can accurately mark defective parts of the electrode in real time regardless of the electrode movement speed.

[0087] The control unit 40 obtains the real-time relative position value of the marking machine 30 at the time of outputting the defect marking signal as a marking coordinate. The real-time relative position value generally coincides with the coordinate value of the defect part. However, in reality, a delay in signal transmission occurs due to communication between the control unit 40 and the defect inspection machine 20. This can cause a coordinate value difference corresponding to the delay. That is, there can be a slight difference between the real-time relative position value and the coordinate value of the defect part. In the roll map described later, it is necessary to display the defect part at the coordinate position of the real electrode actually marked by the marking machine 30. Therefore, the control unit 40 transmits the marking coordinate to the roll map creation unit 50 described later so that the defect part can be displayed on the roll map based on the marking coordinate.

[0088] The control unit 40 is connected to be able to communicate data with the position measuring device 10, the defect inspection device 20, and the marking device 30. It is also connected to be able to communicate data with a roll map creation unit 50, which will be described later.

[0089] The control unit 40 may include both a function of controlling the electrode travel between the unwinder UW and the rewinder RW and a function of controlling the marking machine 30. The control unit 40 may be configured as a control unit 40 in which these functions are integrated. An example of a detailed configuration of such a control unit 40 is shown in the embodiment of FIG. 3. Referring to FIG. 3, the control unit 40 includes an electrode travel control unit 41 and a marking machine control unit 42.

[0090] The electrode travel control unit 41 controls the movement of the electrode from the unwinder UW to the rewinder RW, and is connected to the position measuring device 10 to obtain information on the electrode winding amount on the rewinder RW.

[0091] The marking machine control unit 42 determines whether or not marking is to be performed by the marking machine 30 .

[0092] The electrode travel control unit 41 and the marking machine control unit 42 are connected to each other so as to be able to communicate data with each other.

[0093] The electrode travel control unit 41 may be a PLC control unit that controls the movement of the electrode 1 between the unwinder UW and the rewinder RW when the electrode 1 is moved in a roll-to-roll state. The electrode travel control unit 41 is connected to the position measuring device 10. Thus, the electrode travel control unit 41 may obtain the electrode winding amount information of the rewinder RW in real time and send the winding amount information to the defect inspection machine 20 and the marking machine control unit 42. As described above, the defect inspection machine 20 may calculate the longitudinal coordinate value of the defect part by adding the first offset distance to the electrode winding amount transmitted from the electrode travel control unit 41. The defect inspection machine 20 transmits the calculated defect part coordinate value to the marking machine control unit 42.

[0094] The marking machine control unit 42 calculates a real-time relative position value of the marking machine 30 by adding the second offset distance C to the electrode winding amount transmitted from the electrode travel control unit 41. In addition, the marking machine control unit 42 outputs a defect marking signal to the marking machine 30 at the moment when the calculated real-time relative position value of the marking machine 30 becomes larger than the defective part coordinate value transmitted from the defect inspection machine 20.

[0095] The marking machine 30 marks the defective portion on the electrode in response to a defect marking signal from the marking machine control section 42 .

[0096] The marking machine control unit 42 acquires the real-time relative position value of the marking machine 30 at the time when the defective marking signal is output as a marking coordinate, and transmits it to the electrode travel control unit 41. The electrode travel control unit 41 transmits the marking coordinate to the roll map creation unit 50 described later.

[0097] <Role map creation system> FIG. 6 is a schematic diagram of the role map creation system of the present invention, FIG. 7 is a schematic diagram showing an example of the role map creation unit 50, and FIG. 8 is a schematic diagram of the role map created by the role map creation system of the present invention.

[0098] The roll map creation system 200 of the present invention includes a position measurement device 10, a defect inspection machine 20, a marking machine 30, a control unit 40, and a roll map creation unit 50.

[0099] The position measuring device 10, the defect inspection device 20, the marking machine 30, and the control unit 40 constitute the above-mentioned electrode marking device 100. The roll map creation system 200 of the present invention further includes a roll map creation unit 50. That is, the roll map creation system 200 of the present invention creates a roll map using the above-mentioned electrode marking device 100. As described above, the control unit 40 includes an electrode travel control unit 41 and a marking machine control unit 42.

[0100] As described above, when the electrode 1 moves between the unwinder UW and the rewinder RW, the position measuring device 10 acquires the position of the electrode 1 as a coordinate value along the longitudinal direction of the electrode according to the amount of rotation of the unwinder UW or the rewinder RW.

[0101] The defect inspection machine 20 inspects the electrode 1 to identify a defect, and is connected to the position measuring device 10 to obtain the coordinate value of the defect along the longitudinal direction of the electrode. The defect coordinate value is a value obtained by adding the first offset distance A, A', which is the distance between the defect inspection machine 20 and the rewinder RW, to the electrode winding amount of the rewinder RW at the time when the defect is detected, as described above.

[0102] The marking machine 30 is installed behind the defect inspection machine 20 along the electrode moving direction, and marks the defective parts on the electrodes in response to a defect marking signal from the control unit 40. The marking machine 30 is, for example, an ink marking machine.

[0103] The control unit 40 outputs a defect marking signal to the marking machine 30 at the moment when the real-time relative position value of the marking machine 30 with respect to the moving electrode 1 becomes larger than the coordinate value of the defective part. The real-time relative position value of the marking machine 30 is a value obtained by adding a second offset distance C, which is a distance between the marking machine 30 and the rewinder RW, to the electrode winding amount at the time when the electrode 1 passes through the marking machine 30 in real time. The marking machine control unit 42 of the control unit 40 calculates the real-time relative position value. The marking machine control unit 42 also receives the defective part coordinate value from the defect inspection machine 20. The marking machine control unit 42 outputs a defect marking signal to the marking machine 30 at the moment when the real-time relative position value of the marking machine 30 becomes larger than the coordinate value of the defective part. The marking machine control unit 42 also acquires the real-time relative position value of the marking machine 30 at the time when the defect marking signal is output as a marking coordinate. The acquired marking coordinates are transmitted to the electrode travel control unit 41, which is, for example, a PLC control unit, and the electrode travel control unit 41 transmits the marking coordinates to the roll map creation unit 50.

[0104] The role map creation system 200 of the present invention includes a role map creation unit 50 .

[0105] The roll map creation unit 50 creates a roll map that replicates the electrode 1 moving in a roll-to-roll state. As shown in Fig. 2, the roll map is defined as a coordinate plane having two coordinate axes, the longitudinal axis and the width axis of the electrode 1. On the roll map, the position of the moving electrode 1 is displayed by the coordinate values ​​of the coordinate plane. The roll map creation unit 50 can indicate the defective portion on the roll map based on the marking coordinates received from the control unit 40 (electrode travel control unit 41).

[0106] The roll map creation unit 50 may include a database 51 that stores data acquired from the position measuring device 10, the defect inspection machine 20, and the control unit 40, or stores data related to the quality, dimensions, etc. of normal electrodes. The roll map creation unit 50 may also include a central processing unit 52 that processes the acquired data and commands a visualization device 53 provided in the roll map creation unit 50 to visualize the data.

[0107] The roll map creation unit 50 includes a visualization device 53 that defines a visualization area forming a coordinate plane of a roll map that replicates the electrode 1 and can visually display the longitudinal axis coordinate values, width axis coordinate values, and various inspection data of the electrode on the defined area. The visualization device 53 can visualize and display various inspection data such as defective part data at the positions of coordinate values ​​(e.g., marking coordinates) at which the inspection data was acquired. The visualization device 53 is connected to the central processing unit 52 and can visualize and display the inspection data and coordinate data according to instructions from the central processing unit.

[0108] Referring to FIG. 7, the visualization device 53 may include an acquired data input unit 53a, a roll map coordinate grasping unit 53b, an image generating unit 53c, and the like.

[0109] The acquired data input unit 53a receives and inputs data from the central processing unit 52.

[0110] The roll map coordinate grasping unit 53b 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 source 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 electrode roll information registration, the roll map coordinate grasping unit 53b 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 1. 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 coordinate value data of the electrode 1 described above.

[0111] The coordinate grasping unit 53b can map the acquired quality or defect data and the (width and length) position data of the electrode 1, and assign the mapped data onto the visualization area (roll map) based on pixel coordinates.

[0112] The image generating unit 53c 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 53c visually displays various data related to quality or defects at pixel coordinates (coordinates on the roll map) corresponding to each position data of the actual electrode 1 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 creating the roll map of the present invention.

[0113] Also, based on data stored in a storage unit such as the database 51, data corresponding to a specific range of the role map can be retrieved from the storage unit and displayed (imaged) on the screen. At this time, the central processing unit 52 can issue a command to the visualization device 53 to visually display test data found to be abnormal in comparison with normal data stored in the database 51, distinguishing it from other data.

[0114] The size setting of the visualization area and the creation 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 creation unit 50 described above is merely an example, and is not limited to the above embodiment.

[0115] The above-mentioned roll map creation unit 50 may be, for example, a data processing system such as a production management system (MES) or a component of the data processing system. The data processing system refers to a system (including hardware and software) that performs input, processing, output, communication, etc. in order to perform a series of operations on data. In the electrode 1 manufacturing process, an electrode MES that manages a series of electrode manufacturing processes such as coating, pressing, slitting, etc., and an assembly MES are provided. Therefore, when the above-mentioned coordinate value data, inspection data, etc. are sent to the MES, the above-mentioned roll map can be created in the MES.

[0116] As shown in FIGS. 6 and 7, the role map may be displayed on a display unit 60.

[0117] FIG. 8 shows an example of a role map created by the role map creating system 200.

[0118] FIG. 8 shows that after the electrode active material is completely coated on the front and back surfaces of the electrode 1, the defect inspection machine 20 inspects for defects. It also shows that the marking machine 30 marks the defects after the defect inspection. The roll map is created after the defect inspection and the marking of the defects. In practice, the roll map is created after all data is acquired from the defect inspection machine 20 and the marking machine 30, all electrodes are wound on the rewinder RW, and the electrode winding roll is completed. The upper drawing of FIG. 8 shows a simplified summary of the time sequence for creating such a roll map.

[0119] The lower drawing in FIG. 8 shows an example of a role map.

[0120] Defects are visually indicated in the coated portion 1a area of ​​the roll map in Fig. 8. The defects shown are spot defects, but the defects that can be marked as described above are not limited to spot defects.

[0121] The marking coordinates of the defective portion are shown at the bottom of the roll map. As described above, the marking coordinates are acquired by the marking machine control unit 42 and transmitted to the roll map creation unit via the electrode travel control unit 41. The roll map creation unit 50 can visually display the defective portion on the coordinate plane of the roll map and at the same time, can display the marking coordinates.

[0122] On the other hand, the black dot markings shown in the non-covered area 1b of the roll map in Figure 8 are for reference only and are not shown on the actual roll map. The above markings are made in the non-covered area of ​​the actual electrode.

[0123] In this specification, the marking coordinate means the coordinate of the defective part along the electrode longitudinal direction. However, as described above, the defect inspection machine 20 can also acquire the width direction coordinate value along the electrode width direction of the defective part. The width direction coordinate value acquired by the defect inspection machine 20 is also transmitted to the roll map creation unit 50 via the control unit 40. In the roll map of FIG. 8, the width direction coordinate value is not shown as a numerical value on the roll map for the sake of simplicity of illustration. However, referring to the roll map of FIG. 8, each spot defect is visually displayed with its position different in the width direction. This means that the defect inspection machine 20 identifies the width direction position of the defective part and transmits the coordinate information to the roll map creation unit 50, and the roll map creation unit 50 visually displays the defective part in the coated part area of ​​the roll map according to the width direction coordinate of each defective part based on the information.

[0124] Second embodiment <Electrode marking device> FIG. 9 is a schematic diagram showing a defective section of a multi-lane electrode to which a defective tag is attached.

[0125] As shown in Figure 9, in the conventional multi-lane electrode in which a plurality of electrode lanes L1, L2, L3, and L4 are arranged along the width direction of the current collector, a label 3 is attached to indicate a defective portion. This method has the following problems.

[0126] First, when marking a defective section, the label 3 is attached only once at the start and end positions of the defect, so if either the start or end display label of the defect is lost, it is difficult to know whether the remaining label is the start or end point.

[0127] Second, as shown in Figure 9, since the defect label is attached to the edge of the electrode current collector plate, if a defect occurs only in specific electrode lanes L1 and L3, there is a risk that even electrode lanes where no defects occur will be deemed defective.

[0128] 9, it was difficult to deal with the case where defect coordinate signals were inputted in overlapping fashion from a plurality of defect inspection devices 20. For example, when inspection device A received a defect start coordinate value of 1000m, and then measuring device B received a defect start coordinate value of 1100m before the defect end coordinate was generated, it was not possible to determine how to handle the defect marking.

[0129] The electrode marking device 100 of the second embodiment is designed to perform marking when a defective portion is represented as a defective section, as shown in FIG.

[0130] That is, the defective portion may be a defective section where defective parts are continuously formed along the electrode 1. Alternatively, if the defective parts appear intermittently, but are continuously formed close to each other as shown in FIG. 9, such a defective portion may also be recognized as a defective section.

[0131] For such defective sections, the start and end coordinates of the defective section must be clearly specified. Also, it is necessary to avoid a defect indication method using a label attachment method, which makes it difficult to determine the start or end point of a defect. Also, in the multi-lane electrode 1, electrode lanes in which defects have occurred and electrode lanes in which no defects have occurred must be marked to distinguish them. And when defects occur in multiple electrode lanes, defects must be indicated on each electrode lane, reflecting all of the overlapping parts.

[0132] The electrode marking device 100 of the present embodiment can achieve this object.

[0133] The basic configuration of the electrode marking device 100 of this embodiment is the same as that shown in FIG.

[0134] Therefore, the electrode marking device 100 includes a position measuring device 10, a defect inspection device 20, a marking machine 30, and a control unit 40. The control unit 40 may include an electrode travel control unit 41 that controls movement of the electrode from the unwinder UW to the rewinder RW and is connected to the position measuring device 10 to obtain information on the electrode winding amount of the rewinder RW, and a marking machine control unit 42 that decides whether or not to perform marking by the marking machine 30. In the electrode marking device 100 of this embodiment, detailed descriptions of the same parts as those in the first embodiment will be omitted.

[0135] The defect inspection machine 20 according to the present embodiment acquires the start coordinate value and the end coordinate value of the defective section along the electrode longitudinal direction. Since the defect inspection machine 20 is connected to the position measuring device 10, it can grasp the electrode winding amount on the rewinder RW while the defective section is detected. That is, the defect inspection machine 20 can receive the electrode winding amount on the rewinder RW at the start and end points of the defective section via the position measuring device 10 or the control unit 40 connected to the position measuring device 10. Similarly, it can receive the electrode winding amount on the rewinder RW that changes between the start and end points of the defective section via the position measuring device 10 or the control unit 40.

[0136] Specifically, in the case of a spot property inspection machine, the captured image for each captured frame is matched with the electrode winding amount, and in the case of a scan property inspection machine, the start / end signal for each scan is matched with the electrode winding amount.

[0137] In addition, the defect inspector 20 calculates the start coordinate value of the defect section after determining the start point of the defect section. At this time, the start coordinate value of the defect section is a value obtained by adding a first offset distance, which is a distance between the defect inspector 20 and the rewinder RW, to the electrode winding amount of the rewinder RW at the time when the first defect point of the defect section is detected by the defect inspector 20 (i.e., the electrode winding amount matched with the first defect point of the defect section).

[0138] In addition, the end coordinate value of the defective section is the electrode winding amount of the rewinder RW at the time when the last defective point of the defective section is detected by the defect inspection device 20 (i.e., the electrode winding amount matched to the last defective point of the defective section) plus the first offset distance, which is the distance between the defect inspection device 20 and the rewinder RW.

[0139] The defect inspection machine 20 receives the electrode winding amount from the control unit 40 (for example, the electrode travel control unit 41), and can obtain the start coordinate value and the end coordinate value of the defective section by adding a first offset distance, which is the distance between the inspection machine and the rewinder RW, to the received electrode winding amount. The start coordinate value and the end coordinate value of the defective section obtained in this manner can be transmitted to the marking machine control unit 42 of the control unit 40.

[0140] The table below shows an example in which the spot property inspector 20a and the scanning property inspector 20b are arranged on two electrode lanes, respectively, and the coordinate values ​​of the defective section are calculated.

[0141] [Table 1]

[0142] <Spot property inspection machine 20a, first offset distance 15m> From Table 1, the defect start coordinate value of electrode lane 2 (L1) inspected by the spot property inspection machine 20a is 515.5 m obtained by adding the first offset distance (15 m) to the electrode winding length of 500.5 m at the start point. The defect end coordinate value of electrode lane 2 is 529.5 m obtained by adding the first offset distance to the electrode winding length of 514.5 m at the end point.

[0143] [Table 2]

[0144] <Scanning inspection machine 20b, first offset distance 10m> From Table 2, the defect start coordinate value of electrode lane 2 inspected by scannability inspection device 20b is 520m, which is obtained by adding the first offset distance (10m) to the electrode winding length at the start point of 510m. The defect end coordinate value of electrode lane 2 is 570m, which is obtained by adding the first offset distance to the electrode winding length at the end point of 560m.

[0145] In Tables 1 and 2 above, the electrode lot count indicates the lot number. For example, the lot number of the electrode that is moved first between the unwinder UW and the rewinder RW may be 0, and the lot number of the electrode that is moved next may be 1. Information regarding such lot numbers may also be stored in the control unit 40 and the roll map creation unit 50.

[0146] The control unit 40 can determine whether to start and end marking by comparing the real-time relative position value of the marking machine 30 with respect to the moving electrode 1 and the start and end coordinate values ​​of the defective section, respectively.

[0147] The real-time relative position value of the marking machine 30 is the electrode winding amount at the time when the electrode 1 passes through the marking machine 30 in real time plus a second offset distance (e.g., 10 m), which is the distance between the marking machine 30 and the rewinder RW.

[0148] The control unit 40, specifically the marking machine control unit 42, outputs a defect marking signal to the marking machine 30 at the moment when the real-time relative position value becomes greater than the start coordinate value of the defect section. The defect marking signal is a signal instructing the start of marking. The marking machine control unit 42 also obtains the real-time relative position value of the marking machine 30 at the time when the defect marking signal is output as the marking start coordinate.

[0149] In addition, the marking machine control unit 42 may cut off the output of a fault marking signal to the marking machine 30 at the moment when the real-time relative position value of the marking machine 30 becomes greater than the end coordinate value of the fault section. The cut-off of the output of the fault marking signal is a signal instructing the end of marking. The marking machine control unit 42 obtains the real-time relative position value of the marking machine 30 at the time when the fault marking signal is cut off as the marking end coordinate.

[0150] The marking machine 30 performs marking on the electrode along the defective section in response to a signal (defective marking signal) instructing the start of marking and a signal (output cutoff of the defective marking signal) instructing the end of marking from the marking machine control unit 42. Specifically, the marking machine 30 performs marking on the non-covered portion 1b located between the covered portions of the multi-lane electrode 1.

[0151] In this way, the electrode marking device 100 of the present embodiment can reliably mark the start and end coordinates of the defective section on the electrode by a marking machine such as an ink marking machine, and therefore the loss of the defective coordinates due to the falling off of the label does not occur as in the conventional case.

[0152] In addition, the marking start coordinates and marking end coordinates are obtained by comparing the real-time relative position value of the marking machine 30, which is a function of the electrode winding amount regardless of the electrode moving speed, with the start coordinates and end coordinates of the defective section, respectively. Therefore, the position of the defective section can be stably grasped regardless of the electrode moving speed.

[0153] Meanwhile, the electrode marking device 100 of the present invention may be applied to marking a defective section of an electrode having one electrode lane. Furthermore, the electrode marking device 100 of the present invention may be applied to marking a defective section of an electrode having a plurality of electrode lanes along the electrode width direction. In this case, the marking machine 30 is disposed for each electrode lane. Each marking machine 30 may continuously mark along the defective section of each electrode lane according to a signal instructing the start and end of marking from the control unit 40. In this case, each defect inspection machine 20 and each marking machine 30 are independently controlled by the control unit 40, specifically, the marking machine control unit 42. Therefore, when a defective section occurs only in a specific electrode lane among a plurality of electrode lanes, marking may be performed by the marking machine 30 in charge of the specific electrode lane. In this case, marking is not performed on the uncovered parts of the other electrode lanes in which no defects occur.

[0154] In addition, when defect coordinate signals are input from a plurality of defect inspection devices 20 in an overlapping manner, the marking devices 30 in charge of the respective electrode lanes perform marking, so that the overlapping portions of the defective sections can also be marked.

[0155] With reference to Tables 1 and 2 above, a defect marking process when defective sections of electrode lanes overlap will be described.

[0156] First, the starting coordinate value of the defective section for electrode lane 1 (L1), 515.5m, is received from the spot property inspection machine 20a. The marking machine control unit 42 monitors the real-time relative position value of the marking machine (first marking machine 30A) in charge of marking electrode lane 1, and outputs a defective marking signal to the first marking machine 30A the moment that value exceeds 515.5m. The first marking machine 30A performs marking on the non-coated portion 1b of electrode lane 1 (L1) based on this defective marking signal. Since the coordinate values ​​of the defective section are continuously received from the spot property inspection machine 20a as shown in Table 1, the first marking machine 30A continues to mark the defective section continuously.

[0157] Meanwhile, during marking by the first marking machine 30A, a start coordinate value of 520m of the defective section for electrode lane 2 is received from the scannability inspection machine 20b. The marking machine control unit 42 monitors the real-time relative position value of the marking machine (second marking machine 30B) in charge of marking electrode lane 2 (L2), and outputs a defective marking signal to the second marking machine 30B the moment that value exceeds 520m. The second marking machine 30B marks the non-coated portion 1b of electrode lane 2 (L2) in response to this defective marking signal. Since the coordinate values ​​of the defective section continue to be received from the scannability inspection machine 20b as shown in Table 2, the second marking machine 30B continues to perform marking continuously.

[0158] When the end coordinate value 529.5m of the defective section is received from the spot property inspection machine 20a and the real-time relative position value of the first marking machine 30A becomes greater than 529.5m, the marking machine control unit 42 cuts off the output of the defective marking signal to the first marking machine 30A.

[0159] In addition, when the end coordinate value 570m of the defective section is received from the scannability inspection device 20b and the real-time relative position value of the second marking device 30B becomes greater than 570m, the marking device control unit 42 cuts off the output of the defective marking signal to the second marking device 30B.

[0160] From the above, in the section where the electrode coordinate value is in the range of 515.5 to 520 m, only the first marking machine 30A marks the electrode lane 1 (L1).

[0161] Furthermore, in the section where the electrode coordinate values ​​are from 520 m to 529.5 m, the defective sections of electrode lane 1 (L1) and electrode lane 2 (L2) overlap. In this case, the first marking machine 30A and the second marking machine 30B mark the uncovered parts 1b of electrode lane 1 (L1) and electrode lane 2 (L2), respectively.

[0162] In the section where the electrode coordinate values ​​are in the range of 529.5 to 570 m, only the second marking machine 30B marks the electrode lane 2 (L2).

[0163] In this manner, the electrode marking device 100 of the present embodiment can effectively mark defective sections even when the defective sections overlap in a multi-lane electrode.

[0164] FIG. 10 shows the marking of defective sections by the first and second marking machines described above.

[0165] <Role map creation system> FIG. 10 is a schematic diagram of a roll map created using the electrode marking device 100 according to the second embodiment of the present invention.

[0166] The roll map creation system 200 of the present invention can display the above-mentioned defective section on the roll map based on the above-mentioned marking start coordinates and marking end coordinates.

[0167] The roll map creation system 200 of this embodiment includes a position measurement device 10 that acquires the position of the electrode 1 according to the amount of rotation of the unwinder UW or the rewinder RW as a coordinate value along the electrode longitudinal direction when the electrode 1 moves between the unwinder UW and the rewinder RW, at least one defect inspection device 20 that inspects the electrode 1 to identify a defective section and is connected to the position measurement device to acquire start and end coordinate values ​​of the defective section along the electrode longitudinal direction, a marking device 30 that is installed behind the defect inspection device 20 along the electrode movement direction and marks the electrode along the defective section in response to a signal from a control unit 40 instructing the start and end of marking, and a real-time relative position value of the marking device 30 with respect to the moving electrode 1 that is the start coordinate value of the defective section. a control unit 40 that outputs a fault marking signal to the marking machine 30 at the moment the real-time relative position value becomes greater than a faulty section end coordinate value, and that blocks the output of the fault marking signal at the moment the real-time relative position value becomes greater than a faulty section end coordinate value, and that acquires the real-time relative position values ​​of the marking machine 30 at the moment the fault marking signal is output and at the moment the fault marking signal is blocked as a marking start coordinate and a marking end coordinate, respectively; and a roll map creation unit 50 that creates a roll map defined as a coordinate plane having two coordinate axes, a longitudinal axis and a transverse axis of the electrode 1, and in which the position of the moving electrode 1 is displayed by the coordinate values ​​of the coordinate plane, and the roll map creation unit 50 can display the faulty section on the roll map based on the marking start coordinate and the marking end coordinate received from the control unit 40.

[0168] The position measuring device, the defect inspection device 20, the marking device 30, the control unit 40, and the roll map creation unit 50 have been described above, so repeated description will be omitted.

[0169] FIG. 10 shows a role map representing two electrode lanes L1 and L2.

[0170] The above roll map shows, on a coordinate plane, the coordinate values ​​of the defective sections obtained by a defect inspection machine equipped with a spot inspection machine and a scanning inspection machine of the second embodiment described above, and the defective sections marked on the actual electrodes by comparing the coordinate values ​​with the real-time relative position values ​​of the first marking machine and the second marking machine, respectively.

[0171] The areas showing the coverage of each electrode lane on the roll map visually indicate defects.

[0172] In addition, marking coordinates are displayed under each defective portion. Specifically, marking start coordinates and marking end coordinates are displayed to indicate defective sections of electrode lane 1 (L1) and electrode lane 2 (L2). In addition, the overlapping portion of the defective sections of electrode lane 1 (L1) and electrode lane 2 (L2) can be easily grasped from the above defective portions.

[0173] For reference, black dot markings are continuously displayed along the defective section in the area corresponding to the uncovered portion 1b of the roll map. As mentioned above, the markings are displayed on the uncovered portion of the actual electrode, and do not necessarily have to be displayed on the roll map.

[0174] The present invention has been described in 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, and therefore there may be various equivalents and modifications that can replace them at the time of filing this application. [Explanation of symbols]

[0175] 1: Electrode 1a: Covering part 1b: Uncoated part 3: Label 10: Position measuring instrument 20: Defective inspection machine 20a: Spot inspection machine 20A:A Inspection Machine 20b: Scanning inspection machine 20B:B measuring instrument 30: Marking machine 30A: First marking machine 30B: Second marking machine 40: Control unit 41: Electrode travel control unit 42: Marking machine control unit 50: Role map creation section 51: Database 52: Central processing unit 53: Visualization device 60: Display section 100: Electrode marking device 200: Role map creation system

Claims

1. A marking device for an electrode moving between an unwinder and a rewinder, comprising: a position measuring device that obtains a position of the electrode according to an amount of rotation of the unwinder or rewinder as a coordinate value along a longitudinal direction of the electrode; at least one defect inspection machine that inspects the electrodes to identify defects and is connected to the position measuring device to obtain coordinate values ​​of the defects along a longitudinal direction of the electrodes; a marking machine installed behind the defect inspection machine along the electrode moving direction; and a control unit for comparing a real-time relative position value of the marking machine with respect to the moving electrode and a coordinate value of the defect part to determine whether to mark the defect part, The marking machine marks the defective portion on the electrode in response to a defect marking signal from the control unit.

2. 2. The electrode marking device according to claim 1, wherein the coordinate value of the defect portion is a value obtained by adding a first offset distance, which is a distance between the defect inspection device and the rewinder, to an electrode winding amount of the rewinder at a time when the defect portion is detected by the defect inspection device.

3. 2. The electrode marking device according to claim 1, wherein the defect inspection machine acquires the position of the defect portion along the electrode width direction as a coordinate value along the electrode width direction.

4. the real-time relative position value of the marking machine is a value obtained by adding a second offset distance, which is a distance between the marking machine and a rewinder, to a winding amount of the electrode at a time when the electrode passes through the marking machine in real time; The electrode marking device according to claim 1 , wherein the control unit outputs a defect marking signal to the marking machine at a moment when the real-time relative position value becomes greater than a coordinate value of the defect portion.

5. The control unit is an electrode travel control unit that controls movement of an electrode from an unwinder to a rewinder and is connected to the position measuring device to obtain information on an electrode winding amount of the rewinder; and a marking machine control unit that determines whether or not to mark the electrode using the marking machine, 5. The electrode marking device according to claim 4, wherein the marking machine control unit calculates a real-time relative position value of the marking machine by adding the second offset distance to the electrode winding amount received from the electrode travel control unit, and outputs a defective marking signal to the marking machine at a moment when the calculated real-time relative position value becomes larger than a coordinate value of the defective part.

6. 6. The electrode marking device according to claim 5, wherein the defect inspection machine obtains coordinate values ​​of the defect part by adding a first offset distance, which is a distance from the defect inspection machine to a rewinder, to the electrode winding amount received from the electrode travel control unit, and transmits the obtained coordinate values ​​of the defect part to the marking machine control unit.

7. The defective portion is a defective section in which defective portions continue continuously or intermittently along the electrode, the defect inspection machine acquires start and end coordinate values ​​of the defect section along the electrode longitudinal direction, the control unit determines whether to start and end marking by comparing a real-time relative position value of the marking device with respect to the moving electrode and a start coordinate value and an end coordinate value of the defective section, respectively; 7. The electrode marking device according to claim 1, wherein the marking machine marks the electrode along the defective section in response to a signal from the control unit instructing a start and end of marking.

8. the start coordinate value of the defect section is a value obtained by adding a first offset distance, which is a distance between the defect inspector and the rewinder, to an electrode winding amount of the rewinder at a time when a first defect point of the defect section is detected by the defect inspector; 8. The electrode marking device of claim 7, wherein the end coordinate value of the defective section is a value obtained by adding the first offset distance to the electrode winding amount of the rewinder at the time when the last defective point of the defective section is detected by the defect inspection device.

9. the real-time relative position value of the marking machine is a value obtained by adding a second offset distance, which is a distance between the marking machine and a rewinder, to a winding amount of the electrode at a time when the electrode passes through the marking machine in real time; The control unit is outputting a defect marking signal to the marking device at a moment when the real-time relative position value becomes greater than a start coordinate value of the defect section; 8. The electrode marking device according to claim 7, wherein output of a fault marking signal to the marking machine is cut off at the moment when the real-time relative position value becomes greater than an end coordinate value of the fault section.

10. The control unit is an electrode travel control unit that controls movement of an electrode from an unwinder to a rewinder and is connected to the position measuring device to obtain information on an electrode winding amount of the rewinder; and a marking machine control unit that determines whether or not to perform marking by the marking machine, the marking machine control unit calculates a real-time relative position value of the marking machine by adding the second offset distance to the electrode winding amount received from the electrode travel control unit; 10. The electrode marking device of claim 9, wherein the marking machine control unit outputs a fault marking signal to the marking machine at a moment when the calculated real-time relative position value becomes greater than a start coordinate value of the faulty section, and blocks output of the fault marking signal to the marking machine at a moment when the real-time relative position value becomes greater than an end coordinate value of the faulty section.

11. 11. The electrode marking device according to claim 10, wherein the defect inspection machine obtains start and end coordinate values ​​of the defective section by adding a first offset distance, which is a distance from the defect inspection machine to a rewinder, to the electrode winding amount received from the electrode travel control unit, and transmits the obtained start and end coordinate values ​​of the defective section to the marking machine control unit.

12. The electrode includes a plurality of electrode lanes along a width direction, The marking device is disposed for each electrode lane, The electrode marking device according to claim 7 , wherein each marking machine continuously marks along the defective section of each electrode lane in response to a signal from the control unit instructing the start and end of marking.

13. a position measuring device that, when the electrode moves between the unwinder and the rewinder, acquires a position of the electrode as a coordinate value along a longitudinal direction of the electrode according to an amount of rotation of the unwinder or the rewinder; at least one defect inspection machine that inspects the electrodes to identify defects and is connected to the position measuring device to obtain coordinate values ​​of the defects along a longitudinal direction of the electrodes; a marking machine, which is installed behind the defect inspection machine along a moving direction of the electrodes and marks the defective part on the electrodes in response to a defect marking signal from a control unit; a control unit that outputs a defect marking signal to the marking unit at the moment when a real-time relative position value of the marking unit with respect to the moving electrode becomes larger than a coordinate value of the defective part, and obtains the real-time relative position value of the marking unit at the time when the defect marking signal is output as a marking coordinate; a roll map creation unit that creates a roll map defined as a coordinate plane having two coordinate axes, a longitudinal axis and a width axis, of the electrode, and in which the position of the moving electrode is displayed by coordinate values ​​on the coordinate plane; The roll map creation unit represents the defect portion on the roll map based on the marking coordinates received from the control unit.

14. a position measuring device that, when the electrode moves between the unwinder and the rewinder, acquires a position of the electrode as a coordinate value along a longitudinal direction of the electrode according to an amount of rotation of the unwinder or the rewinder; at least one defect inspection machine that inspects the electrodes to identify defective sections and is connected to the position measuring device to obtain start and end coordinate values ​​of the defective sections along a longitudinal direction of the electrodes; a marking machine that is installed behind the defect inspection machine along the electrode moving direction and marks the electrode along the defect section in response to a signal from a control unit instructing a start and end of marking; a control unit that outputs a fault marking signal to the marking device when a real-time relative position value of the marking device with respect to the moving electrode becomes greater than a start coordinate value of the fault section, and blocks output of the fault marking signal when the real-time relative position value becomes greater than an end coordinate value of the fault section, and obtains the real-time relative position values ​​of the marking device at the time of outputting and blocking the fault marking signal as a marking start coordinate and a marking end coordinate, respectively; a roll map creation unit that creates a roll map defined as a coordinate plane having two coordinate axes, a longitudinal axis and a width axis, of the electrode, and in which the position of the moving electrode is displayed by coordinate values ​​on the coordinate plane; The roll map creation unit represents the defective section on the roll map based on the marking start coordinates and the marking end coordinates received from the control unit.

15. The electrode includes a plurality of electrode lanes along a width direction, The marking device is disposed for each electrode lane, Each marking machine continuously marks along the defective section of each electrode lane in response to a signal from the control unit instructing the start and end of marking, The roll map creation system according to claim 14 , wherein the roll map creation unit represents a defective section of each electrode lane on a roll map representing each electrode lane.

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