Method and device for controlling sheet thickness in electrode plate manufacturing process

Abstract

To provide a method for controlling the thickness of a sheet.SOLUTION: A sheet thickness control method according to the present disclosure includes the steps of obtaining a measured thickness for each of multiple portions of a sheet rolled through multiple rollers, calculating a dispersion degree for the sheet thickness on the basis of the obtained thickness for each of the multiple portions, determining movement information for at least one target roller among the multiple rollers on the basis of the calculated dispersion degree, and controlling so that the at least one target roller is moved on the basis of the determined movement information.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a method for controlling sheet thickness in a plate manufacturing process, and more particularly to a method and apparatus for controlling the thickness of a sheet by moving at least one target roller that is to be moved based on the dispersion degree of the sheet thickness. [Background technology]

[0002] Unlike primary batteries, which cannot be charged, secondary batteries are batteries that can be charged and discharged. Low-capacity secondary batteries are used in small portable electronic devices such as smartphones, feature phones, laptop computers, digital cameras, and camcorders, while large-capacity secondary batteries are widely used as motor drive power sources and power storage batteries in hybrid and electric vehicles.

[0003] Such a secondary battery includes an electrode plate, which may be composed of a first sheet bonded to one side of a substrate and a second sheet bonded to the other side of the substrate. In order to manufacture such an electrode plate, a dry electrode plate process is used in which a powder is rolled using a plurality of rollers. However, if there is a deviation in the thickness of an electrode plate produced by the dry electrode plate process, the electrochemical performance and safety of the secondary battery may be deteriorated.

[0004] The above information disclosed in this Background of the Invention is intended solely to enhance the understanding of the background of the present invention and may thus include information that does not constitute prior art. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Korean Patent Application Publication No. 10-2013-0139490 Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention provides a method and apparatus for controlling sheet thickness in a plate manufacturing process so that the plate thickness is uniform.

[0007] However, the technical problems that the present invention aims to solve are not limited to the problems mentioned above, and other problems not mentioned should be clearly understood by those skilled in the art from the description of the invention described below. [Means for solving the problem]

[0008] A method for controlling a sheet thickness in a plate manufacturing process, which is performed by at least one processor according to one embodiment of the present disclosure for solving the above technical problem, includes the steps of obtaining a measured thickness for each of multiple portions of a sheet rolled through multiple rollers, calculating a dispersion degree for the sheet thickness based on the obtained thickness for each of the multiple portions, determining movement information for at least one target roller among the multiple rollers based on the calculated dispersion degree, and controlling the movement of the at least one target roller based on the determined movement information.

[0009] A computer program may be provided for implementing the above-described sheet thickness control method on a computer.

[0010] A control device according to one embodiment of the present disclosure for solving the above technical problem includes a memory and at least one processor coupled to the memory and configured to execute at least one computer-readable program contained in the memory, wherein the at least one program includes instructions for acquiring a measured thickness for each of a plurality of portions of a sheet rolled through a plurality of rollers, calculating a dispersion degree for the thickness of the sheet based on the acquired thickness for each of the plurality of portions, determining movement information of at least one target roller among the plurality of rollers based on the calculated dispersion degree, and controlling the movement of the at least one target roller based on the determined movement information. Effect of the Invention

[0011] According to some embodiments of the present disclosure, the dispersion degree of the sheet is calculated in real time, and at least one target roller can be controlled to move in a first direction or a second direction based on the calculated dispersion degree of the sheet, whereby the gap between a pair of rollers that roll the sheet is adaptively adjusted and optimized, so that a sheet having a uniform thickness can be formed on a substrate.

[0012] According to some embodiments of the present disclosure, the position of the rollers can be changed in real time based on the spread degree of the sheet calculated in real time, thereby adaptively responding to various environmental changes in the electrode plate manufacturing process and minimizing the occurrence of deviations in the thickness of the electrode plates.

[0013] According to some embodiments of the present disclosure, the thickness of the electrode plate including the sheet becomes uniform, thereby improving the electrochemical performance and safety of the secondary battery including the electrode plate.

[0014] However, the effects obtained by the present invention are not limited to the effects described above, and other technical effects not mentioned should be clearly understood by those skilled in the art from the description of the invention described below.

[0015] The following drawings and the like attached to this specification illustrate preferred embodiments of the present invention and, together with the detailed description of the invention described below, serve to further understand the technical ideas of the present invention. Therefore, the present invention should not be interpreted as being limited to only the matters depicted in such drawings. [Brief description of the drawings]

[0016] [Figure 1] FIG. 2 is a schematic diagram of a dry electrode plate process according to one embodiment of the present disclosure. [Diagram 2] 1 is an exemplary diagram illustrating how a thickness of a sheet is measured based on a distance according to an embodiment of the present disclosure; FIG. [Diagram 3] FIG. 13 is a schematic diagram of a dry electrode plate process according to another embodiment of the present disclosure. [Figure 4] 13 is an exemplary diagram for explaining that the thickness of a sheet is measured based on the distance according to another embodiment of the present disclosure. FIG. [Diagram 5] FIG. 1 is an exemplary diagram showing an arrangement of three sensors according to an embodiment of the present disclosure. [Figure 6] FIG. 2 is a block diagram showing a control device according to an embodiment of the present disclosure. [Figure 7] 11 is a flowchart illustrating a method for generating a correction value according to an embodiment of the present disclosure. [Figure 8] 1 is an illustrative diagram showing how sheet thickness is controlled in a plate manufacturing process according to one embodiment of the present disclosure. FIG. [Figure 9] FIG. 13 is an exemplary diagram illustrating a state of a roller moved in a first direction according to a dispersion degree in accordance with an embodiment of the present disclosure. [Figure 10] FIG. 13 is an exemplary diagram showing a state of the first roller re-moved according to a recalculated dispersion degree according to an embodiment of the present disclosure. [Figure 11] FIG. 13 is an exemplary diagram illustrating a state of a roller moved in a second direction according to a dispersion degree in an embodiment of the present disclosure. [Figure 12] FIG. 13 is an exemplary diagram showing a state of the first roller re-moved according to a recalculated dispersion degree according to an embodiment of the present disclosure. [Figure 13]11 is an exemplary diagram illustrating a method for determining a target roller according to an embodiment of the present disclosure. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] <Summary of the Invention> The movement information according to one embodiment of the present disclosure includes a movement amount and a movement direction of at least one target roller, and the step of controlling the at least one target roller to be moved may include a step of controlling the at least one target roller to be moved by the movement amount in the movement direction included in the movement information.

[0018] In addition, the step of determining the movement information may include a step of determining the movement direction of at least one target roller as a first direction when the calculated dispersion degree is within a first range, and a step of determining the movement direction of at least one target roller as a second direction when the calculated dispersion degree is within a second range.

[0019] Also, the first direction may be a direction in which the fixed roller is located, and the second direction may be a direction opposite to the direction in which the fixed roller is located.

[0020] The sheet thickness control method may further include a step of determining one or more rollers, excluding the fixed roller, among the plurality of rollers as at least one target roller.

[0021] In addition, the one or more rollers determined as the at least one target roller may include a first roller spaced a first distance from the fixed roller, and a second roller spaced a second distance from the fixed roller that is longer than the first distance, and the step of controlling the movement of the at least one target roller may include a step of controlling the first roller to be moved first and the second roller to be moved subsequently based on the determined movement information.

[0022] In addition, the one or more rollers determined as the at least one target roller may include a first roller spaced a first distance from the fixed roller, and a second roller spaced a second distance from the fixed roller that is longer than the first distance, and the step of controlling the at least one target roller to be moved may include a step of controlling the first roller and the second roller to be moved together based on the determined movement information.

[0023] In addition, the sheet thickness control method may further include, after the step of controlling so that at least one target roller is moved, a step of reacquiring the thickness measured for each of the multiple portions of the sheet rolled through the multiple rollers, a step of recalculating the dispersion for the thickness of the sheet based on the reacquired thickness for each of the multiple portions, and if the recalculated dispersion deviates from the threshold range, a step of identifying a pair of rollers that has the greatest impact on generating a difference between the thickness of a first portion and the thickness of a second portion of the sheet, and a step of controlling so that at least one of the identified pair of rollers is moved.

[0024] The sheet thickness control method may further include a step of identifying a pair of rollers that has the greatest impact on generating a difference between the thickness of a first portion and the thickness of a second portion of the sheet when the calculated dispersion deviates from a threshold range, and a step of determining at least one target roller to include at least one of the identified pair of rollers.

[0025] Additionally, the step of determining the at least one target roller may include determining the at least one target roller to include at least one roller located in a second direction relative to between the identified pair of rollers.

[0026] In addition, the step of obtaining a measured thickness for each of the multiple portions of the sheet may include a step of measuring a third distance between the distance measuring sensor and the roller being the subject of distance measurement using the distance measuring sensor, a step of measuring a fourth distance between the distance measuring sensor and a specific portion of the sheet located on the surface of the roller being the subject of distance measurement using the distance measuring sensor, and a step of obtaining a thickness of the specific portion of the sheet based on the third distance and the fourth distance.

[0027] The sheet thickness control method may also include the steps of using the distance measuring sensor to measure a fifth distance between the distance measuring sensor and a substrate located on the surface of the roller to be measured, using the distance measuring sensor to measure a sixth distance between the distance measuring sensor and a specific portion of the sheet located on one side of the substrate, and obtaining the thickness of the specific portion of the sheet based on the fifth distance and the sixth distance.

[0028] In addition, the step of calculating the dispersion for the sheet thickness may include the steps of calculating an average for each thickness of the acquired multiple portions, calculating a difference between a thickness of a first portion and a thickness of a second portion among the acquired thicknesses of the multiple portions, and calculating the dispersion for the sheet thickness based on the calculated average thickness, the difference between the thicknesses, and a predetermined target thickness.

[0029] The sheet thickness control method also includes, prior to the step of obtaining a measured thickness for each of the multiple portions, a step of obtaining a measured thickness for the sheet, a step of calculating a difference between the obtained sheet thickness and a predetermined sheet reference thickness, and a step of determining a thickness correction value based on the calculated difference, and the step of obtaining a measured thickness for each of the multiple portions may include a step of correcting at least one of the measured thicknesses for each of the multiple portions based on the thickness correction value.

[0030] The sheet thickness control method also includes, prior to the step of obtaining a measured thickness for each of the multiple portions, the steps of obtaining a measured thickness for the sheet and a measured thickness for a plate including a substrate, calculating a difference between the obtained thickness of the plate and a reference thickness of a predetermined plate, and determining a thickness correction value based on the calculated difference, wherein the step of obtaining a measured thickness for each of the multiple portions can include a step of correcting at least one of the measured thicknesses for each of the multiple portions based on the thickness correction value.

[0031] <Detailed Description of the Invention> Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. First, the terms and words used in the present specification and claims should not be interpreted as being limited to their ordinary and dictionary meanings, but should be interpreted as being consistent with the technical idea of ​​the present invention, in accordance with the principle that the inventor can appropriately define the concept of the term in order to best describe his / her invention. Therefore, it should be understood that the configurations shown in the embodiments and drawings described in the present specification are merely some preferred embodiments of the present invention, and do not represent the entire technical idea of ​​the present invention, and that there may be various equivalents and modifications that can replace them at the time of filing this application. In addition, as used in the present specification, "comprise" and / or "comprising" specify the presence of a mentioned shape, number, step, operation, member, element, and / or group, and do not exclude the presence or addition of one or more other shapes, numbers, operations, members, elements, and / or groups. In addition, when describing an embodiment of the present invention, "may" and "may" can include "one or more embodiments of the present invention."

[0032] In order to facilitate understanding of the invention, the accompanying drawings are not drawn to scale, and the dimensions of some components may be exaggerated. In addition, the same reference numerals are used to refer to the same components in different embodiments.

[0033] A statement that two comparison objects are "identical" means that they are "substantially identical." Therefore, being substantially identical can include cases where there is a deviation that is considered to be a low level in the art, for example, a deviation within 5%. In addition, in a given region, a certain parameter being uniform can mean that it is uniform in an average sense.

[0034] Although the terms "first", "second", etc. are used to describe various components, it is understood that these components are not limited by these terms. These terms are merely used to distinguish one component from another, and it is understood that a first component can be a second component unless otherwise specified.

[0035] Throughout the specification, unless specifically stated to the contrary, each element may be singular or plural.

[0036] When an arbitrary structure is disposed on the "top (or bottom)" of a component or "above (or below)" a component, it can mean not only that the arbitrary structure is disposed in contact with the upper surface (or lower surface) of the component, but also that other structures may be interposed between the component and any structure disposed above (or below) the component.

[0037] In addition, when a certain component is described as being "coupled," "coupled," or "connected" to another component, it should be understood that the components can be directly coupled or connected to each other, but other components can also be "interposed" between each component, or each component can be "coupled," "coupled," or "connected" via other components. In addition, when a certain part is said to be electrically coupled to another part, this includes not only the case where they are directly coupled, but also the case where they are coupled via another element in between.

[0038] Throughout the specification, "A and / or B" means A, B, or A and B, unless specifically stated to the contrary. That is, "and / or" includes any and all combinations of the listed items. "C through D" means at least C and at most D, unless specifically stated to the contrary.

[0039] In addition, the term "module" or "unit" as used in the specification means a software or hardware component, and the "module" or "unit" performs a certain function. However, the term "module" or "unit" is not limited to software or hardware. The "module" or "unit" may be configured to reside on an addressable storage medium and may be configured to execute one or more processors. Thus, by way of example, a "module" or "unit" may include components such as software components, object-oriented software components, class components, and task components, as well as at least one of a process, a function, an attribute, a procedure, a subroutine, a segment of program code, a driver, firmware, microcode, a circuit, data, a database, a data structure, a table, an array, or a variable. The components and "modules" or "units" may be combined into a smaller number of components and "modules" or "units" or further separated into additional components and "modules" or "units" where the functions provided therein are smaller.

[0040] In the present disclosure, "each of a plurality of A's" can refer to each of all of the components included in the plurality of A's, or each of some of the components included in the plurality of A's.

[0041] Various embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings.

[0042] FIG. 1 is a schematic diagram of a dry plate process according to an embodiment of the present disclosure. As shown in FIG. 1, a first powder pocket 122, a plurality of sensors 172, 174, 176, 178, and a plurality of rollers 132, 134, 136 are used in the dry plate process to manufacture a first sheet 162. Also, a second powder pocket 124, a plurality of sensors 182, 184, 186, 188, and a plurality of rollers 142, 144, 146 are used in the dry plate process to manufacture a second sheet 164. Although FIG. 1 illustrates an example in which six rollers are used, the number of rollers used in the process can be determined based on at least one of the distance, thickness, or amount of powder discharged from the powder pockets 122, 124 of the target sheets 162, 164.

[0043] According to an embodiment, various materials for manufacturing the first sheet 162 may be mixed and placed in the first powder pocket 122 in a powder form. For example, an active material, a conductive material, etc. may be mixed and placed in the first powder pocket 122. Similarly, various materials for manufacturing the second sheet 164 may be mixed and placed in the second powder pocket 124 in a powder form. For example, an active material, a conductive material, etc. may be mixed and placed in the second powder pocket 124. Here, the first sheet 162 may be a positive electrode sheet, and the second sheet 164 may be a negative electrode sheet. Conversely, the first sheet 162 may be a negative electrode sheet, and the second sheet 164 may be a positive electrode sheet.

[0044] Among the multiple rollers 132, 134, 136, 142, 144, 146, some may be fixed rollers 136, 146 that cannot move, and some may be rollers 132, 134, 142, 144 that can move in both directions. The fixed rollers 136, 146 are rollers 136, 146 adjacent to the substrate 150 and may be laminating rollers. Each of the rollers 132, 134, 136, 142, 144, 146 can rotate in a clockwise or counterclockwise direction. Such a rotational force can roll the powder material and / or the sheets 162, 164. 1 as an example, the powdery material supplied from the first powder pocket 122 is primarily rolled through the first roller 132 and the second roller 134, a first sheet 162 is discharged, the first sheet 162 discharged after the primary rolling is secondary rolled through the second roller 134 and the third roller 136, and then rolled and attached to one side of the substrate 150 through the third roller 136. Similarly, the powdery material supplied from the second powder pocket 124 is primarily rolled through the fourth roller 142 and the fifth roller 144, a second sheet 164 is discharged, the first sheet 164 discharged after the primary rolling is secondary rolled through the fifth roller 144 and the sixth roller 146, and then rolled and attached to the other side of the substrate 150 through the sixth roller 146.

[0045] Through multiple such rolling, the first sheet 162 and the second sheet 164 may be formed to a desired thickness and attached to the substrate 150 .

[0046] However, there may be cases where the thickness of the sheets 162, 164 attached to the substrate 150 is non-uniform or does not match a target value. According to an embodiment, the control device 110 may calculate a dispersion degree for each of the thicknesses of the first sheet 162 and the second sheet 164, and generate and determine movement information for at least one target roller to be moved based on the calculated dispersion degrees. Here, the dispersion degree indicates the degree to which the thickness of the sheets 162, 164 is not uniform and is dispersed, and may be expressed as a numerical value. A method of calculating the thickness will be described later with reference to the following equation (1). In addition, the movement information may include a movement direction and a movement amount for at least one target roller.

[0047] According to one embodiment, the control device 110 can determine a movement amount and a movement direction included in the movement information, and move at least one target roller based on the determined movement amount and movement direction.

[0048] Each of the movable rollers 132, 134, 142, 144 can move in a first direction and / or a second direction. Each of the rollers 132, 134, 142, 144 can communicate with the control device 110 and can receive a control command from the control device 110. For example, the rollers 132, 134, 142, 144 can receive a movement command from the control device 110 and move to a specified direction and position based on a movement direction and a movement amount included in the movement command. As another example, a moving member (not shown) for moving the rollers 132, 134, 142, 144 is coupled to the rollers 132, 134, 142, 144, and the control device 110 can control the movement of each of the rollers 132, 134, 142, 144 by moving the moving member in the first direction or the second direction. For example, a plurality of moving members are coupled to the upper or lower portions of the plurality of rollers 132, 134, 142, 144, and the control device 110 can control the movement of the rollers 132, 134, 142, 144 by moving at least one moving member in a first direction or a second direction. Here, the first direction may be a direction in which the fixed rollers 136, 146 are located, and the second direction may be a direction opposite to the direction in which the fixed rollers 136, 146 are located. Here, the first direction may be a direction toward the positions of the fixed rollers 136, 146, and the second direction may be a direction away from the positions of the fixed rollers 136, 146. That is, the first direction may be a direction from the roller 132 toward the fixed roller 136, or a direction from the roller 142 toward the fixed roller 146, and the second direction may be a direction from the fixed roller 136 toward the roller 132, or a direction from the fixed roller 146 toward the roller 142.

[0049] In order to measure the dispersion of the sheet thickness, a plurality of sensors 172, 174, 176, 178, 182, 184, 186, 188 may be disposed at a plurality of positions to measure the thickness of each of the plurality of portions of the sheet 162, 164. Each of the sensors 172, 174, 176, 178, 182, 184, 186, 188 may acquire sensing data related to the thickness of the plurality of portions of the sheet 162, 164 located on the surface of the roller 134, 136, 144, 146. For example, sensing data may be acquired for the thickness of the left portion of the sheet 162, 164 located on the surface of the roller 134, 136, 144, 146, and sensing data may be acquired for the thickness of the right portion of the sheet 162, 164 located on the surface of the roller 134, 136, 144, 146. As another example, sensing data may be obtained for the left or right side of the sheets 162, 164 located on the surfaces of the rollers 134, 136, 144, 146, and sensing data may be obtained for the thickness of the central portion of the sheets 162, 164. FIG. 1 illustrates an example in which a first sensor 172 and a second sensor 174 are arranged to measure the thickness of the first sheet 162 located on the surface of the second roller 134, and a third sensor 176 and a fourth sensor 178 are arranged to measure the thickness of the first sheet 162 located on the surface of the third roller 136. Similarly, FIG. 1 illustrates an example in which a fifth sensor 182 and a sixth sensor 184 are arranged to measure the thickness of the second sheet 164 located on the surface of the fifth roller 144, and a seventh sensor 186 and an eighth sensor 188 are arranged to measure the thickness of the second sheet 164 located on the surface of the sixth roller 146. However, the present disclosure is not so limited and one or more sensors may be positioned to measure the thickness of a sheet located on the surface of the roller.

[0050] A variety of sensors may be used in the electrode plate manufacturing process to measure the thickness of the sheets 162, 164. For example, the sensors 172, 174, 176, 178, 182, 184, 186, 188 may be a variety of sensors such as distance measuring sensors, vision sensors, x-ray thickness measuring sensors, radiation thickness measuring sensors, and the like.

[0051] The control device 110 can receive sensing data in real time from each of the plurality of sensors 172, 174, 176, 178, 182, 184, 186, 188 by wired and / or wireless communication with each of the plurality of sensors 172, 174, 176, 178, 182, 184, 186, 188. The plurality of sensing data received from the first to fourth sensors 172, 174, 176, 178 is associated with thicknesses of the plurality of portions of the first sheet 162, and the plurality of sensing data received from the fifth to eighth sensors 182, 184, 186, 188 is associated with thicknesses of the plurality of portions of the second sheet 164. According to an embodiment, the control device 110 can calculate a first dispersion for the thickness of the first sheet 162 and a second dispersion for the thickness of the second sheet 164 based on the received sensing data.

[0052] The control device 110 may determine whether the first dispersion degree deviates from a predetermined threshold range, and if so, may determine movement information for at least one target roller to control the thickness of the first sheet 162. According to an embodiment, the control device 110 may determine at least one target roller to be moved among the movable rollers 132, 134 associated with the production of the first sheet 162, and control the at least one target roller to be moved based on the movement direction and movement amount included in the movement information. Also, the control device 110 may determine movement information for at least one target roller when the second dispersion degree deviates from the threshold range. Similarly, the control device 110 may determine at least one target roller to be moved among the movable rollers 142, 144 associated with the production of the second sheet 164, and control the at least one target roller to be moved based on the movement direction and movement amount included in the movement information. Various methods for determining movement information including the movement amount and movement direction of at least one target roller will be described below with reference to FIGS. 6 to 13.

[0053] On the other hand, the sensors 172, 174, 176, 178, 182, 184, 186, 188 may be distance measuring sensors. In this case, the thickness of the specific portion of the sheet 162, 164 can be measured based on the distance between the sensor 172, 174, 176, 178, 182, 184, 186, 188 and the roller 134, 136, 144, 146, and the distance between the sensor 172, 174, 176, 178, 182, 184, 186, 188 and the sheet 162, 164.

[0054] 2 is an exemplary diagram for explaining that the thickness of a sheet is measured based on the distance according to an embodiment of the present disclosure. The sensor 230 shown in FIG. 2 may be a sensor that measures the distance based on a light beam such as a laser.

[0055] 2, a sensor 230 can be used to measure a first distance d1 (where d1 is a positive real number) between the sensor 230 and a roller 210 whose distance is to be measured. For example, the first distance d1 between the roller 210 and the sensor 230 can be measured without any material placed on the surface of the roller 210.

[0056] 2, with the sheet 220 positioned on the surface of the roller 210, a second distance d2 (where d2 is a positive real number) between the sensor 230 and a specific portion 222 of the sheet 220 positioned on the surface of the roller 210 can be measured using the sensor 230. A thickness t (where t is a positive real number) of the specific portion 222 of the sheet 220 can be measured based on the measured first distance d1 and second distance d2. For example, the control device (e.g., the control device 110 of FIG. 1) can calculate or determine that the difference between the first distance d1 and the second distance d2 is the thickness of the specific portion 222 of the sheet 220.

[0057] Additionally, sensors can be positioned on one side and the other side of the substrate, respectively.

[0058] 3 is a schematic diagram of a dry plate process according to another embodiment of the present disclosure. Compared with FIG. 1, it can be seen that the positions of sensors 372, 374, 382, ​​and 384 shown in FIG. 3 are different.

[0059] To measure the spread of the sheet thickness, multiple sensors 372, 374, 382, ​​384 can be positioned at multiple locations to measure the thickness of each of the multiple locations of the sheets 162, 164. As shown in Figure 3, multiple sensors 372, 374 can be positioned to measure multiple locations of a first sheet 162 located on one side of the substrate 150, and multiple sensors 382, ​​384 can be positioned to measure multiple locations of a second sheet 164 located on the other side of the substrate 150.

[0060] The first sensor 372 can acquire sensing data associated with a thickness of a first portion of the first sheet 162 located on one side of the substrate 150, and the second sensor 374 can acquire sensing data associated with a thickness of a second portion of the first sheet 162 located on one side of the substrate 150. Similarly, the third sensor 382 can acquire sensing data associated with a thickness of a first portion of the second sheet 164 located on the other side of the substrate 150, and the fourth sensor 430 can acquire sensing data associated with a thickness of a second portion of the second sheet 164 located on the other side of the substrate 150.

[0061] The control device 310 can receive sensing data from each of the sensors 372, 374, 382, ​​384 in real time by communicating with each of the sensors 372, 374, 382, ​​384 by wire or wireless communication. According to an embodiment, the control device 310 can calculate a first dispersion degree for the thickness of the first sheet 162 and calculate a second dispersion degree for the thickness of the second sheet 164 based on the received sensing data. The control device 310 can also determine movement information for at least one target roller based on the first dispersion degree and / or the second dispersion degree, and control the target roller to move based on the movement information. The control device 310 shown in FIG. 3 can be the same device as the control device 110 shown in FIG. 1. Alternatively, the control device 310 shown in FIG. 3 can be a device different from the control device 110 shown in FIG. 1.

[0062] According to some embodiments, a plurality of sensors 172, 174, 176, 178, 182, 184, 186, 188 shown in Fig. 1 and a plurality of sensors 372, 374, 382, ​​384 shown in Fig. 3 are used in the electrode plate manufacturing process. That is, in order to more accurately measure the spread in thickness of the sheet, a plurality of sensors 172, 174, 176, 178, 182, 184, 186, 188 are used to measure the thickness of the sheet on the roller before it is bonded to the substrate 150, and a plurality of sensors 372, 374, 382, ​​384 are used to measure the thickness of the sheet bonded to the substrate 150.

[0063] 4 is an exemplary diagram for explaining that the thickness of a sheet is measured based on distance according to another embodiment of the present disclosure. The sensor 430 shown in FIG. 4 may be a sensor that measures distance based on a light beam such as a laser.

[0064] 4, the sensor 430 can be used to measure a third distance d3 (where d3 is a positive real number) between the sensor 430 and a particular portion of the substrate 410 between which the distance is to be measured, as shown in the first example 401 of FIG. For example, the third distance d3 between the substrate 410 and the sensor 430 can be measured without a sheet bonded to the substrate 410.

[0065] As shown in the second example 402 of Fig. 4, with the sheet 420 bonded to one side of the substrate 410, a fourth distance d4 (where d4 is a positive real number) between the sensor 430 and the specific portion 422 of the sheet 420 bonded to the substrate 410 can be measured. Based on the measured third distance d3 and fourth distance d4, the thickness of the specific portion 422 of the sheet 420 can be measured. For example, the control device (e.g., the control device 310 of Fig. 3) can calculate or determine the difference t (where t is a positive real number) between the third distance d3 and the fourth distance d4 as the thickness of the specific portion 422 of the sheet 420.

[0066] However, according to some embodiments, three or more sensors may be positioned to measure three or more areas associated with the roller / substrate to measure left, center and right areas of the sheet.

[0067] FIG. 5 is an exemplary diagram showing an arrangement of three sensors according to an embodiment of the present disclosure. Referring to a first example 501 of FIG. 5, a first sensor 532 for measuring the thickness of a left portion 522 of a sheet 520 located on the surface of a roller 510, a second sensor 534 for measuring the thickness of a central portion 524 of a sheet 520 located on the surface of the roller 510, and a third sensor 536 for measuring the thickness of a right portion 526 of a sheet 520 located on the roller 510 may be arranged. Taking FIG. 1 as an example, three sensors may be arranged in association with each of the plurality of rollers 134, 136, 144, and 146. Using each of the plurality of sensors 532, 534, and 536, the thickness of the left portion 522 of the sheet 520, the thickness of the central portion 524 of the sheet 520, and the thickness of the right portion 526 of the sheet 520 may be measured.

[0068] 5, a fourth sensor 562 for measuring the thickness of a left portion 552 of a sheet 550 bonded to one side of the substrate 540, a fifth sensor 564 for measuring the thickness of a central portion 554 of a sheet 550 bonded to one side of the substrate 540, and a sixth sensor 566 for measuring the thickness of a right portion 556 of a sheet 550 bonded to one side of the substrate 540 may be arranged. Taking FIG. 3 as an example, three sensors may be arranged to measure the thickness of the left / right / center of a first sheet 162 bonded to one side of the substrate 150. Additionally or alternatively, three sensors may be arranged to measure the thickness of the left / right / center of a second sheet 164 bonded to the other side of the substrate 150.

[0069] 6 is a block diagram illustrating a control device 600 according to an embodiment of the present disclosure. The control device 600 illustrated in FIG. 6 may correspond to at least one of the control device 110 in FIG. 1 or the control device 310 in FIG.

[0070] The controller 600 may include a memory 620, a processor 610, and a communication module 630. As shown in Figure 6, the controller 600 may communicate with the rollers and / or sensors using the communication module 630.

[0071] Based on the wireless / wired protocol of the communication module 630, the control device 600 can provide a configuration or function for communicating with a sensor. Additionally, based on the wireless / wired protocol of the communication module 630, the control device 600 can provide a configuration or function for communicating with a roller.

[0072] The memory 620 may include any non-transitory computer-readable recording medium. According to an embodiment, the memory 620 may include a permanent mass storage device such as a read only memory (ROM), a disk drive, a solid state drive (SSD), and a flash memory. As another example, a permanent mass storage device such as a ROM, an SSD, a flash memory, and a disk drive may be included in the control device 600 as a separate permanent storage device separate from the memory, or may be included in a device that can be accessed by the control device 600 via a wired or wireless connection. The memory 620 may also store an operating system and at least one program code (e.g., a program code for calculating the degree of dispersion and controlling the roller).

[0073] The processor 610 can be configured to process computer program instructions by performing basic arithmetic, logic, and input / output operations. The instructions can be transferred to the rollers and / or sensors via the memory 620 and / or the communication module 630.

[0074] The processor 610 can obtain a measured thickness for each of a plurality of portions of the sheet rolled through the plurality of rollers, and calculate a dispersion degree for the thickness of the sheet based on the obtained thickness for each of the plurality of portions. The processor 610 can then execute instructions to determine movement information of at least one target roller among the plurality of rollers based on the calculated dispersion degree, and to control the at least one target roller to be moved based on the determined movement information.

[0075] As shown in FIG. 6, the processor 610 can include a data collector 612 , a correction applicator 614 , a spread calculator 616 , and a roller controller 618 .

[0076] The data collector 612 can use the communications module 630 to receive sensing data associated with thickness from each of the multiple sensors and / or from a memory 620 that stores such sensing data. For example, the sensing data can include the thickness of the sheet. Additionally or alternatively, the sensing data can include the distance between the sensor and the sheet.

[0077] The correction applicator 614 can calculate a correction value to be applied to the at least one sensor. According to one embodiment, the correction applicator 614 can initially obtain a measured thickness for the sheet and calculate a difference between the obtained thickness of the sheet and a predetermined reference thickness of the sheet. According to one embodiment, the correction applicator 614 can obtain a measured thickness for the sheet based on the sensing data collected by the data collector 612. The correction applicator 614 can also determine a correction value based on the calculated difference.

[0078] Additionally or alternatively, the correction applicator 614 can obtain an initial measured thickness for the sheet and a measured thickness for the plate including the substrate. The plate thickness can be obtained via at least one sensor. The correction applicator 614 can calculate a difference between the obtained plate thickness and a predetermined reference thickness and determine a correction value based on the calculated difference.

[0079] At least one of the thicknesses measured for each of the multiple portions of the sheet can be corrected based on the calculated correction value.

[0080] The dispersion calculation unit 616 can obtain the thickness of each portion of the sheet based on the sensing data collected by the data collection unit 612, and calculate the dispersion of the sheet thickness based on the obtained thicknesses of the multiple portions. According to an embodiment, the dispersion calculation unit 616 can calculate the dispersion of the sheet thickness using the following equation 1.

[0081]

number

[0082] The roller control unit 618 can determine movement information for at least one target roller among the rollers based on the dispersion degree calculated by the dispersion degree calculation unit 616, and control the at least one target roller to be moved based on the determined movement information. According to one embodiment, the roller control unit 618 can control the movement of the at least one target roller by transferring a command associated with the movement to the at least one target roller via the communication module 630.

[0083] According to one embodiment, the roller control unit 618 can determine the movement information by referring to Table 1 below. The movement information can include a movement amount and a movement direction.

[0084] [Table 1]

[0085] Referring to Table 1, the roller control unit 618 may control the rollers in their current positions to produce a sheet without moving the rollers when the dispersion degree D is within a threshold range (e.g., -f μm≦D≦+g μm). The roller control unit 618 may control at least one target roller to be moved in a first direction when the movement information calculated based on the dispersion degree D includes a + value. Conversely, the roller control unit 618 may control at least one target roller to be moved in a second direction when the movement information determined based on the dispersion degree D includes a - value. The letters (e.g., a, b, c, d, e, f, g, h, i, j, k, l, A, B, C, D, E, F) in Table 1 may be set to 0 or any positive real number.

[0086] Fig. 7 is a flow chart illustrating a method 700 for generating a correction value according to an embodiment of the present disclosure. Each step of the method 700 illustrated in Fig. 7 may be performed by the correction application unit 614 illustrated in Fig. 6. For convenience of explanation, each step of Fig. 7 will be described as being performed by the processor 610 included in the control device 600 of Fig. 6. The method 700 illustrated in Fig. 7 may be a method for generating a correction value that is performed before controlling the movement of a roller.

[0087] 7, the processor may obtain a thickness measured for a particular portion of the sheet using at least one sensor (S710). According to one embodiment, when multiple sensors are used, an average value for the thickness of the sheet may be obtained as the thickness of the sheet.

[0088] The processor can then measure a thickness for the plate using the at least one sensor (S720). For example, the thickness for the plate can be obtained by adding a thickness of a first sheet coupled to the plate, a thickness of a second sheet coupled to the plate, and a predetermined thickness of the substrate.

[0089] The processor may then calculate (S730) a first difference between the sheet thickness and a first predetermined reference thickness, where the first reference thickness may refer to a reference value associated with the sheet thickness, and the processor may calculate (S740) a second difference between the plate thickness and a second predetermined reference thickness, where the second reference thickness may refer to a reference value associated with the plate thickness.

[0090] The processor may then generate a correction value based on at least one of the first difference or the second difference (S750). For example, the processor may generate the correction value by applying a first weighting value to the first difference and a second weighting value to the second difference, where the first weighting value and the second weighting value may be predetermined or may be dynamically changed.

[0091] The generated correction value can then be applied to at least one of the thicknesses measured for the multiple locations on the sheet. For example, if the correction value is "+r", +r can be applied to a first thickness measured for a first location on the sheet to correct the first thickness. As another example, if the correction value is "-r", "-r" can be applied to a second thickness measured for a second location on the sheet to correct the second thickness, where r can be any positive real value.

[0092] 8 is a diagram illustrating a method 800 for controlling sheet thickness in an electrode plate manufacturing process according to an embodiment of the present disclosure. Each step of the method 800 shown in FIG. 8 can be performed by the dispersion calculation unit 616 and the roller control unit 618 shown in FIG. 6. For convenience of explanation, each step of FIG. 8 will be described as being performed by the processor 610 included in the control device 600 of FIG. 6.

[0093] The processor can obtain a thickness measured for each of the multiple portions of the sheet rolled through the multiple rollers (S810). According to an embodiment, a correction value is applied to at least one of the thicknesses of the multiple portions measured to correct the thickness. According to an embodiment, the processor can obtain a thickness measured for each of the multiple portions of the sheet based on sensing data received from at least one sensor. For example, the processor can use the distance measurement sensor to measure a third distance between the distance measurement sensor and the roller to be measured, and use the distance measurement sensor to measure a fourth distance between the distance measurement sensor and a specific portion of the sheet located on the surface of the roller to be measured. Then, the processor can obtain a thickness of the specific portion of the sheet based on the third distance and the fourth distance. As another example, the processor can use the distance measurement sensor to measure a fifth distance between the distance measurement sensor and a substrate located on the surface of the roller to be measured, and use the distance measurement sensor to measure a sixth distance between the distance measurement sensor and a specific portion of the sheet located on one side of the substrate. Then, the processor can obtain a thickness of the specific portion of the sheet based on the fifth distance and the sixth distance.

[0094] The processor can then calculate a dispersion for the sheet thickness based on the thickness for each of the acquired multiple regions (S820). According to one embodiment, the processor can calculate an average for the thickness of each of the acquired multiple regions, and calculate a difference between the thickness of a first region and a thickness of a second region among the acquired multiple regions. The processor can then calculate a dispersion for the sheet thickness based on the calculated average thickness, the difference between the thicknesses, and a predetermined target thickness. For example, the processor can calculate the dispersion for the sheet thickness using the formula in Equation 1 above.

[0095] The processor may then determine whether the calculated dispersion falls outside a predefined threshold range (S830).

[0096] When it is determined that the calculated dispersion degree falls outside the threshold range, the processor may determine movement information of at least one target roller among the plurality of rollers based on the calculated dispersion degree (S840). According to one embodiment, the movement information may include a movement amount and a movement direction of the at least one target roller. For example, when the calculated dispersion degree is included in a first range, the processor may determine the movement direction of the at least one target roller as a first direction. As another example, when the calculated dispersion degree is included in a second range, the processor may determine the movement direction of the at least one target roller as a second direction. Here, the first direction may be a direction in which the fixed roller is located, and the second direction may be a direction opposite to the direction in which the fixed roller is located.

[0097] Thereafter, the processor may control the at least one target roller to be moved based on the determined movement information (S850). According to one embodiment, the processor may control the at least one target roller to be moved by a movement amount in a movement direction included in the movement information.

[0098] According to an embodiment, the processor may determine one or more rollers, excluding the fixed roller, among the plurality of rollers as at least one target roller. For example, the one or more rollers determined as at least one target roller may include a first roller separated from the fixed roller by a first distance, and a second roller separated from the fixed roller by a second distance longer than the first distance. In this case, the processor may control the first roller to be moved first and the second roller to be moved subsequently based on the movement amount and movement direction included in the movement information. As another example, the processor may control the first roller and the second roller to be moved simultaneously based on the movement amount and movement direction included in the movement information. In this case, the first roller and the second roller may be moved by the same movement amount in the same direction.

[0099] According to some embodiments, the processor may determine at least one target roller to include at least one of the identified pair of rollers after identifying the pair of rollers that has the greatest influence on the occurrence of the difference between the thickness of the first portion and the thickness of the second portion of the sheet when the dispersion degree deviates from the threshold range. Here, the pair of rollers that has the greatest influence on the occurrence of the difference between the thickness of the first portion and the thickness of the second portion of the sheet is associated with the largest difference between the thickness of the first portion of the sheet rolled through the pair of rollers and the thickness of the second portion of the sheet. For example, if the difference between the thickness of the first portion and the thickness of the second portion measured from the sheet rolled through the first roller and the second roller is "n" (where n is a natural number) and the difference between the thickness of the first portion and the thickness of the second portion measured from the sheet rolled through the second roller and the third roller is "n+1", the pair of rollers that has the greatest influence on the occurrence of the difference between the thickness of the first portion and the thickness of the second portion of the sheet may be the second roller and the third roller.

[0100] The processor can determine the moving direction of the target roller based on the calculated dispersion and determine at least one target roller to include at least one roller located in the second direction with respect to the identified pair of rollers. An example in which only a part of the rollers excluding the fixed roller is determined as the target roller will be described later with reference to FIG. 13.

[0101] According to one embodiment, the processor may control at least one target roller to be moved, then reacquire the thickness measured for each of the multiple portions of the sheet rolled through the multiple rollers, and recalculate the dispersion of the sheet thickness based on the reacquired thickness for each of the multiple portions. Then, if the recalculated dispersion falls outside the threshold range, the processor may identify a pair of rollers that has the greatest effect on the difference between the thickness of the first portion and the thickness of the second portion of the sheet, and then control at least one of the identified pair of rollers to be moved in a first direction or a second direction. Specific examples of the movement of a specific roller will be described later with reference to FIG. 10 and FIG. 12.

[0102] Various examples of roller movement will be described below with reference to Figures 9 to 13. Figures 9 to 13 are examples of the movement of the rollers that roll the first sheet, and it will be obvious to those skilled in the art that a similar control method can be applied to the rollers that roll the second sheet.

[0103] 9 is an exemplary diagram showing a state of rollers 912, 914 moved in a first direction by a dispersion degree according to an embodiment of the present disclosure. In FIG. 9, the roller 916 closest to the substrate 918 is a fixed roller 916, and the other rollers 912, 914 are illustrated as movable rollers. The distance between the first roller 912 and the second roller 914 before the movement is a first distance g1, and the distance between the second roller 914 and the third roller 916 is a second distance g2, and the first distance g1 and the second distance g2 are shown to be the same distance in FIG. 9. Here, each of g1 to g4 can be a positive real number.

[0104] The dispersion for the sheet thickness is calculated, and the movement information can be determined based on the calculated dispersion. In Fig. 9, when the dispersion is in the range of "-d" (where d is a positive real number) to "-e" (where e is a positive real number) and the movement information is determined based on Table 1 in relation to the dispersion, the movement information can be determined as "+C μm" (where C is a positive real number).

[0105] When the movement information is determined as "+C μm", the first roller 912 and the second roller 914, which are movable rollers excluding the fixed roller 916, are determined as target rollers, and the first roller 912 and the second roller 914 can move by "C μm" in the first direction, which is the direction of the third roller 916. When the movement is completed, the distance between the first roller 912 and the second roller 914 can be a third distance g3, and the distance between the second roller 914 and the third roller 916 can be a fourth distance g4. For example, the third distance g3 and the fourth distance g4 are the same, and the third distance g3 / fourth distance g4 is shorter than the first distance g1 / second distance g2, as shown in FIG. 9.

[0106] In this way, when the gap between the rollers is narrowed, a thinner sheet can be rolled and discharged through the pair of rollers.

[0107] The dispersion for the thickness of the sheet can be recalculated even after the target roller is moved. According to one embodiment, the processor can reacquire the thickness measured for each of the multiple portions of the sheet rolled through the multiple rollers, and recalculate the dispersion for the thickness of the sheet based on the reacquired thickness for each of the multiple portions.

[0108] Fig. 10 is an exemplary diagram illustrating a state of the first roller 912 re-moved based on the recalculated dispersion degree according to an embodiment of the present disclosure. For example, Fig. 10 illustrates a state in which the first roller 912 is moved in a second direction based on the recalculated dispersion degree after the first roller 912 and the second roller 914 in Fig. 9 are moved.

[0109] According to an embodiment, if the recalculated dispersion degree deviates from the threshold range, a pair of rollers that has the greatest influence on the occurrence of the difference between the thickness of the first portion and the thickness of the second portion of the sheet can be identified. For example, in Fig. 9, since the difference between the thickness of the first portion and the thickness of the second portion of the sheet rolled by the first roller 912 and the second roller 914 is the largest, the first roller 912 and the second roller 914 are determined to be the pair of rollers that has the greatest influence on the occurrence of the difference between the thickness of the first portion and the thickness of the second portion of the sheet.

[0110] The first roller 912 and the second roller 914 have the greatest effect on the difference between the thickness of the first portion and the thickness of the second portion of the sheet, and therefore it is possible to determine a target roller to be moved from among the first roller 912 and the second roller 914. Based on the recalculated dispersion, the movement information is re-determined, and when the movement information includes a second direction, the first roller 912 can be determined as the target roller.

[0111] As shown in Fig. 10, the first roller 912 is determined as the target roller, and thus the first roller 912 can move in the second direction by the movement amount included in the movement information. For example, Fig. 10 shows that the distance g5 between the first roller 912 and the second roller 914 is longer than the distance g4 between the second roller 914 and the third roller 916. Here, each of g4 and g5 can indicate a positive real number.

[0112] FIG. 11 is an exemplary diagram showing the state of rollers 1112, 1114 moved in the second direction by the degree of dispersion according to an embodiment of the present disclosure. For example, in FIG. 11, the roller 1116 closest to the substrate 1118 is shown as a fixed roller, and the other rollers 1112, 1114 are shown as movable rollers. The distance between the first roller 1112 and the second roller 1114 before the movement is a sixth distance g6, and the distance between the second roller 1114 and the third roller 1116, which is a fixed roller, is a seventh distance g7, and the sixth distance g6 and the seventh distance g7 are shown to be the same distance in FIG. 11. Here, each of g6 and g7 may be a positive real number.

[0113] The dispersion for the sheet thickness is calculated, and the movement information can be determined based on the calculated dispersion. In Fig. 11, when the dispersion is in the range of "+h" (where h is a positive real number) to "+i" (where i is a positive real number) and the movement information is determined based on Table 1 in relation to the dispersion, the movement information can be determined as "-D μm" (where D is a positive real number).

[0114] When the movement information is determined as "-D μm", the first roller 1112 and the second roller 1114, which are movable rollers excluding the fixed roller 1116, are determined as target rollers, and the first roller 1112 and the second roller 1114 can move by D μm in a second direction opposite to the third roller 1116. When the movement is completed, the distance between the first roller 1112 and the second roller 1114 can be an eighth distance g8, and the distance between the second roller 1114 and the third roller 1116 can be a ninth distance g9. For example, in FIG. 11, the eighth distance g8 and the ninth distance g9 are shown to be the same, and the eighth distance g8 / ninth distance g9 is longer than the sixth distance g6 / seventh distance g7. Here, each of g8 and g9 can be a positive real number.

[0115] With such a wide roller gap, a thicker sheet can be rolled and discharged through the pair of rollers.

[0116] Even after the target roller is moved, the spread for the sheet thickness can be recalculated.

[0117] Fig. 12 is an exemplary diagram illustrating a state of the first roller 1112 re-moved based on the recalculated dispersion degree according to an embodiment of the present disclosure. For example, Fig. 12 illustrates a state in which the first roller 1112 is moved in a second direction based on the recalculated dispersion degree after the first roller 1112 and the second roller 1114 in Fig. 11 are moved.

[0118] According to one embodiment, if the recalculated dispersion falls outside the threshold range, the pair of rollers that has the greatest influence on the occurrence of the difference between the thickness of the first portion and the thickness of the second portion of the sheet can be identified. For example, in FIG. 12, the first roller 1112 and the second roller 1114 are shown as being the pair of rollers that has the greatest influence on the occurrence of the difference between the thickness of the first portion and the thickness of the second portion of the sheet.

[0119] A target roller to be moved may be determined from the first roller 1112 and the second roller 1114. Based on the recalculated dispersion, the movement information is re-determined, and if the movement information includes the first direction, the first roller 1112 may be determined as the target roller.

[0120] As shown in Fig. 12, the first roller 1112 is determined as the target roller, and thus the first roller 1112 can move in the first direction by the movement amount included in the movement information. As a result, a distance g10 between the first roller 1112 and the second roller 1114 is shorter than a distance g9 between the second roller 1114 and the third roller 1116, as illustrated in Fig. 12. Here, each of g9 and g10 may be a positive real number.

[0121] On the other hand, based on the calculated dispersion, only a portion of the movable rollers may be determined as target rollers.

[0122] 13 is an exemplary diagram illustrating a method for determining a target roller according to an embodiment of the present disclosure. For example, in FIG. 13, the fifth roller 1320 closest to the substrate 1330 is shown as a fixed roller, and the number of rollers used in the production of a particular sheet is shown to be five.

[0123] When the spread for the thickness of the sheet deviates from the threshold range, the pair of rollers that has the greatest influence on the occurrence of the difference between the thickness of the first portion and the thickness of the second portion of the sheet can be identified. In FIG. 13, the pair of rollers that has the greatest influence on the occurrence of the difference between the thickness of the first portion and the thickness of the second portion of the sheet is illustrated as the third roller 1316 and the fourth roller 1318.

[0124] According to some embodiments, the processor can determine at least one target roller to include at least one roller located in a second direction with reference to the space 1340 between the identified pair of rollers 1316, 1318. The second direction in FIG. 13 is a direction from the space 1340 toward the roller 1312. For example, FIG. 13 shows that the first roller 1312, the second roller 1314, and the third roller 1316 located in the second direction with reference to the space 1340 between the identified pair of rollers 1316, 1318 are determined as target rollers. The first roller 1312, the second roller 1314, and the third roller 1316 determined as target rollers can move by the movement amount in the first direction or the second direction included in the movement information. In FIG. 13, the first direction is a direction from the first roller 1312 toward the space 1340.

[0125] The above flow charts and descriptions are merely illustrative and may be implemented differently in some embodiments, for example, the order of steps may be changed, some steps may be repeated, some steps may be omitted, or some steps may be added.

[0126] The above-mentioned method may be provided as a computer program stored in a computer-readable recording medium (e.g., memory, etc.) for execution by a computer. The medium may be one that continuously stores a computer-executable program or one that temporarily stores the program for execution or download. The medium may be various recording means or storage means in the form of a single or multiple hardware components combined, and is not limited to a medium directly connected to a certain computer system, but may be one that is distributed over a network. Examples of the medium include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical recording media such as CD-ROMs and DVDs, magneto-optical media such as floptical disks, and ROMs, RAMs, flash memories, etc., configured to store program instructions. Other examples of the medium include recording media or storage media managed by app stores that distribute applications, or sites, servers, etc. that supply or distribute various other software.

[0127] Although the present invention has been described above with reference to limited embodiments and drawings, it is to be understood that the present invention is not limited thereto, and various modifications and variations can be made by those having ordinary skill in the art to which the present invention pertains within the technical spirit of the present invention and the equivalent scope of the claims. [Explanation of symbols]

[0128] 110 Control device 122, 124 Powder pocket 132, 134, 136, 142, 144, 146 Laura 150 Base material 162, 164 seats 172, 174, 176, 178, 182, 184, 186, 188 Sensors

Claims

1. 1. A method for controlling sheet thickness in a plate manufacturing process, the method being performed by at least one processor, comprising: obtaining a measured thickness for each of a plurality of portions of the sheet rolled through a plurality of rollers; calculating a dispersion degree for the thickness of the sheet based on the thicknesses of the plurality of portions obtained; determining movement information of at least one target roller among the plurality of rollers based on the calculated dispersion degree; and controlling the at least one target roller to be moved based on the determined movement information.

2. the movement information includes a movement amount and a movement direction of the at least one target roller, The sheet thickness control method according to claim 1 , wherein the step of controlling the at least one target roller to be moved includes a step of controlling the at least one target roller to be moved by the movement amount in a movement direction included in the movement information.

3. The step of determining the movement information includes: determining a moving direction of the at least one target roller as a first direction if the calculated dispersion degree is within a first range; The method of claim 2 , further comprising: determining a moving direction of the at least one target roller as a second direction when the calculated dispersion degree is within a second range.

4. The method for controlling thickness of a sheet according to claim 3 , wherein the first direction is a direction in which a fixed roller of the plurality of rollers is located, and the second direction is a direction opposite to the direction in which the fixed roller is located.

5. The method for controlling a thickness of a sheet according to claim 1 , further comprising the step of determining one or more rollers of the plurality of rollers, excluding a fixed roller, as the at least one target roller.

6. the one or more rollers determined as the at least one target roller include a first roller spaced apart from the fixed roller by a first distance, and a second roller spaced apart from the fixed roller by a second distance greater than the first distance; 6. The sheet thickness control method of claim 5, wherein the step of controlling the movement of the at least one target roller includes the step of controlling the first roller to be moved first and the second roller to be moved subsequently based on the determined movement information.

7. the one or more rollers determined as the at least one target roller include a first roller spaced apart from the fixed roller by a first distance, and a second roller spaced apart from the fixed roller by a second distance greater than the first distance; 6. The method of claim 5, wherein the step of controlling the at least one target roller to be moved includes the step of controlling the first roller and the second roller to be moved together based on the determined movement information.

8. After the step of controlling the at least one target roller to be moved, Reacquiring a measured thickness for each of a plurality of portions of the sheet rolled through the plurality of rollers; recalculating a dispersion degree for the thickness of the sheet based on the thickness for each of the plurality of portions reacquired; If the recalculated dispersion degree falls outside a threshold range, identifying a pair of rollers that has the greatest influence on the occurrence of a difference between the thickness of a first portion and the thickness of a second portion of the sheet; The method of claim 1 further comprising the step of: controlling at least one of the identified pair of rollers to be moved.

9. If the calculated dispersion degree falls outside a threshold range, identifying a pair of rollers that has the greatest influence on the occurrence of a difference between the thickness of a first portion and a thickness of a second portion of the sheet; The sheet gauge control method of claim 1 , further comprising: determining said at least one target roller to include at least one of said identified pair of rollers.

10. 10. The sheet thickness control method of claim 9, wherein the step of determining the at least one target roller includes a step of determining the at least one target roller to include at least one roller located in the second direction with respect to a gap between the identified pair of rollers.

11. The step of obtaining a measured thickness for each of a plurality of portions of the sheet includes: using a distance measurement sensor to measure a third distance between the distance measurement sensor and a roller to be measured; measuring a fourth distance between the distance measuring sensor and a specific portion of the sheet located on a surface of a roller that is the subject of distance measurement, using the distance measuring sensor; The method for controlling a thickness of a sheet according to claim 1 , further comprising: obtaining a thickness of the specific portion of the sheet based on the third distance and the fourth distance.

12. The step of obtaining a measured thickness for each of a plurality of portions of the sheet includes: using a distance measuring sensor to measure a fifth distance between the distance measuring sensor and a substrate located on a surface of a roller to be measured; measuring a sixth distance between the distance measuring sensor and a specific portion of the sheet located on one side of the substrate using the distance measuring sensor; and obtaining a thickness of the specific portion of the sheet based on the fifth distance and the sixth distance.

13. The step of calculating the dispersion degree with respect to the thickness of the sheet includes: calculating an average thickness for each of the acquired multiple regions; Calculating a difference between a thickness of a first region and a thickness of a second region among the thicknesses of the acquired multiple regions; 2. The sheet thickness control method of claim 1, further comprising the step of: calculating a dispersion for the thickness of the sheet based on the calculated average thickness, the difference between the thicknesses, and a predetermined target thickness.

14. prior to the step of obtaining a measured thickness for each of the plurality of sites, obtaining a measured thickness for the sheet; calculating a difference between the obtained sheet thickness and a predetermined sheet reference thickness; determining a thickness correction value based on the calculated difference; 2. The sheet thickness control method of claim 1, wherein the step of obtaining a measured thickness for each of the plurality of portions includes a step of correcting at least one of the measured thicknesses for each of the plurality of portions based on the thickness correction value.

15. prior to the step of obtaining a measured thickness for each of the plurality of sites, obtaining a measured thickness for the sheet and a measured thickness for a plate including a substrate; Calculating a difference between the obtained plate thickness and a predetermined plate reference thickness; determining a thickness correction value based on the calculated difference; 2. The sheet thickness control method of claim 1, wherein the step of obtaining a measured thickness for each of the plurality of portions includes a step of correcting at least one of the measured thicknesses for each of the plurality of portions based on the thickness correction value.

16. A computer readable computer program for carrying out the method according to any one of claims 1 to 15.

17. A control device for controlling sheet thickness in a plate manufacturing process, comprising: Memory, at least one processor coupled to the memory and configured to execute at least one computer readable program contained in the memory; The at least one program comprises: obtaining a measured thickness for each of a plurality of portions of the sheet rolled through a plurality of rollers; Calculating a dispersion degree for the thickness of the sheet based on the thickness for each of the acquired multiple portions; determining movement information of at least one target roller among the plurality of rollers based on the calculated dispersion degree; A controller including instructions for controlling the at least one target roller to be moved based on the determined movement information.

18. the movement information includes a movement amount and a movement direction of the at least one target roller, The control device according to claim 17 , wherein controlling the at least one target roller to move includes controlling the at least one target roller to move by the movement amount in a movement direction included in the movement information.

19. Determining the movement information includes: If the calculated dispersion degree is within a first range, determining a moving direction of the at least one target roller as a first direction; The control device of claim 18 , further comprising determining a moving direction of the at least one target roller as a second direction if the calculated spread degree is within a second range.

20. Calculating the dispersion with respect to the thickness of the sheet Calculating the average thickness of each of the acquired multiple sites; Calculating a difference between a thickness of a first portion and a thickness of a second portion among the thicknesses of the acquired plurality of portions; The control system of claim 17 further comprising: calculating a spread for the thickness of the sheet based on the calculated average thickness, the difference between the thicknesses, and a predetermined target thickness.

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