Electrode plate for rechargeable battery, apparatus for manufacturing the same, and method for manufacturing the same

Abstract

The present disclosure relates to an electrode plate for a rechargeable battery, an apparatus for manufacturing the same, and a method for manufacturing the same. The electrode plate manufacturing apparatus for a secondary battery includes: a supply reel configured to supply a substrate having a non-coated first surface and an at least partially coated second surface; and a patterning device adjacent to the supply reel, the patterning device including a polygonal roller and a support roller facing each other, the patterning device configured to pattern a substrate passing between the polygonal roller and the support roller, the polygonal roller including a convex curved portion, the convex curved portions extend in an axial direction of the polygonal roller and are arranged in a circumferential direction of the polygonal roller.

Description

Technical Field

[0001] Aspects of embodiments of the present disclosure are directed to an electrode plate for a rechargeable battery, an apparatus for manufacturing the same, and a method for manufacturing the same. Background Art

[0002] Unlike non-rechargeable primary batteries, secondary batteries can be charged and discharged. Low-capacity secondary batteries can be used for small portable electronic devices (such as smart phones, feature phones, laptops, digital cameras and video cameras), and high-capacity secondary batteries can be used for power sources of motor drives and energy storage batteries for hybrid vehicles and electric vehicles. Each of these secondary batteries includes an electrode assembly (which includes a positive electrode and a negative electrode), a shell that accommodates the electrode assembly, an electrode terminal connected to the electrode assembly, etc.

[0003] The above information disclosed in this Background section is for enhancement of understanding of the background of the present disclosure and therefore it may contain information that does not constitute related (or prior) art. Summary of the invention

[0004] An aspect of an embodiment provides an electrode plate manufacturing apparatus for a secondary battery, the electrode plate manufacturing apparatus comprising: a supply reel configured to supply a substrate having a non-coated first surface and a second surface at least a portion of which is formed with a coating; and a pattern forming device configured to form a pattern on the substrate by passing the substrate between a polygonal roller and a support roller while pressurizing the substrate, a plurality of convex curved portions being formed on the polygonal roller. Here, the convex curved portions extend in the axial direction of the polygonal roller and are arranged in the circumferential direction of the polygonal roller.

[0005] According to an embodiment, in the electrode plate manufacturing apparatus, each of the convex curved portions contacting the substrate may have a continuously formed gradient.

[0006] According to an embodiment, in an electrode plate manufacturing device, a section cut in a direction perpendicular to the axial direction of the polygonal roller may include a plurality of raised portions corresponding to convex curved portions, respectively. Here, each raised portion may have a distance greater than or equal to 0.4 mm and less than or equal to 1 mm between the intersection of a tangent at the starting point of each raised portion and a circular arc and the intersection of a tangent at the end point of each raised portion and a circular arc. In addition, each circular arc may be a virtual arc that passes through the midpoint of one raised portion among the raised portions and the midpoints of two raised portions adjacent to the one raised portion.

[0007] According to an embodiment, in the electrode plate manufacturing apparatus, convex curved portions each having a first curvature radius and a plurality of concave curved portions each having a second curvature radius may be alternately formed in the polygonal roller. Here, the first curvature radius may be smaller than the second curvature radius.

[0008] According to an embodiment, in the electrode plate manufacturing apparatus, the support roller may be positioned on the first surface side of the substrate to support the first surface of the substrate, and the polygonal roller may be positioned on the second surface side of the substrate to pressurize the second surface of the substrate.

[0009] According to an embodiment, in the electrode plate manufacturing apparatus, the supply reel may supply the substrate such that the first surface of the substrate faces upward and the second surface of the substrate faces downward, and the polygonal roller may be positioned on a lower side of the substrate.

[0010] According to an embodiment, the electrode plate manufacturing apparatus may further include a first driver configured to lift and lower the polygonal roller, and a controller configured to control the first driver so that the polygonal roller pressurizes the substrate at a pressure less than a predetermined pressure.

[0011] According to an embodiment, the electrode plate manufacturing apparatus may further include a heater provided in front of the pattern forming device to heat the substrate.

[0012] According to an embodiment, in the electrode plate manufacturing apparatus, the heater may include a heating roller configured to heat the substrate and at least one guide roller configured to guide the substrate so that the substrate passes through the heating roller by being in close contact with the heating roller.

[0013] According to an embodiment, in the electrode plate manufacturing apparatus, a heating roller may be positioned on the second surface side of the substrate to heat the second surface of the substrate, and at least one guide roller may be positioned on the first surface side of the substrate to support the first surface of the substrate.

[0014] According to an embodiment, in the electrode plate manufacturing apparatus, the polygonal roller may have a higher hardness than the support roller.

[0015] According to an embodiment, in the electrode plate manufacturing apparatus, the support roller may be a sponge roller.

[0016] According to an embodiment, the electrode plate manufacturing equipment may further include: a notching device configured to punch a substrate having a pattern formed thereon through a pattern forming device to form a wiring piece; a cutter configured to cut the substrate having a wiring piece formed thereon through the notching device to make an electrode plate; a controller configured to control the notching device and the cutter; and a material storage box configured to stack the electrode plates made by the cutter.

[0017] According to an embodiment, the electrode plate manufacturing apparatus may further include a transfer device configured to vacuum-adsorb the electrode plate manufactured by the cutter and transfer the electrode plate to a storage box.

[0018] According to an embodiment, the electrode plate manufacturing apparatus may further include a feed roller configured to move the substrate in a process direction, a second driver configured to rotate the feed roller, and a controller configured to control the second driver.

[0019] According to an embodiment, in the electrode plate manufacturing apparatus, a length of the polygonal roller in an axial direction may be greater than a length of the substrate in a width direction.

[0020] According to an embodiment, in the electrode plate manufacturing apparatus, an uneven pattern may be formed by a pattern forming device and extend in a width direction of a substrate to prevent curling of the substrate.

[0021] According to an embodiment, in an electrode plate manufacturing apparatus, an uneven pattern may be formed on a tab by a pattern forming device to prevent curling of the tab.

[0022] Aspects of the embodiments also provide a method for manufacturing an electrode plate for a secondary battery, the method comprising: supplying a substrate having a non-coated first surface and a second surface at least a portion of which is formed with a coating; and forming a pattern on the substrate by passing the substrate between a polygonal roller and a support roller while pressurizing the substrate, a plurality of convex curved portions being formed on the polygonal roller. Here, the convex curved portions extend in the axial direction of the polygonal roller and are arranged in the circumferential direction of the polygonal roller.

[0023] According to an embodiment, an electrode plate for a secondary battery according to another embodiment of the present disclosure may be manufactured by the above-mentioned electrode plate manufacturing method.

[0024] However, the technical problems to be solved by the present disclosure are not limited to the above problems, and other problems not mentioned herein and aspects and features of the present disclosure to solve these problems will be clearly understood by those skilled in the art from the following description of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings attached to this specification illustrate embodiments of the present disclosure, and together with the detailed description of the present disclosure, further describe aspects and features of the present disclosure. Therefore, the present disclosure should not be interpreted as being limited to the accompanying drawings:

[0026] Figure 1 A schematic diagram showing an example of an electrode plate manufacturing apparatus according to an embodiment of the present disclosure is shown;

[0027] Figure 2 A cross-sectional view showing an example of a substrate that is not patterned is shown;

[0028] Figure 3 An example of a pattern forming device according to an embodiment of the present disclosure forming a pattern on a supplied substrate is shown;

[0029] Figure 4 shows the substrate according to the use of Figure 1 Examples of electrode plate manufacturing equipment and processes for manufacturing electrode plates;

[0030] Figure 5 An example of a polygonal roller according to an embodiment of the present disclosure and a cross section of the polygonal roller cut in a direction perpendicular to the axial direction are shown;

[0031] Figure 6 Shows the display Figure 5 an enlarged view of a portion of a cross section of a polygonal roller;

[0032] Figure 7 shows an example comparing electrode plates manufactured under various pressure conditions according to various embodiments of the present disclosure;

[0033] Figure 8 An example of a transfer electrode plate according to an embodiment of the present disclosure is shown;

[0034] Fig. 9 A schematic diagram showing an example of an electrode plate manufacturing apparatus according to another embodiment of the present disclosure is shown; and

[0035] Fig.10 A flowchart showing an example of a method of manufacturing an electrode plate according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0036] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The terms or words used in the present specification and claims should not be interpreted as limited to the usual meaning or dictionary meaning, but should be interpreted as meanings and concepts consistent with the technical idea of ​​the present disclosure based on the principle that the inventor can be his / her own lexicon compiler to appropriately define the concept of the term so as to interpret his / her invention in the best manner.

[0037] The embodiments described in this specification and the configurations shown in the drawings are only some embodiments of the present disclosure and do not represent all technical ideas, aspects and features of the present disclosure. Therefore, it should be understood that when submitting this application, there may be various equivalents and modifications that can replace or modify the embodiments described herein.

[0038] It will be understood that when an element or layer is referred to as being "on," "connected to," or "bound to" another element or layer, it may be directly on, directly connected to, or directly bound to the other element or layer, or there may be one or more intervening elements or layers. When an element or layer is referred to as being "directly on," "directly connected to," or "directly bound to" another element or layer, there may be no intervening elements or layers. For example, when a first element is described as being "bound to" or "connected to" a second element, the first element may be directly bound or connected to the second element, or the first element may be indirectly bound or connected to the second element via one or more intervening elements.

[0039] In the accompanying drawings, for the clarity of the illustration, the sizes of various elements, layers, etc. may be exaggerated. The same reference numerals represent the same elements. As used herein, the term "and / or" includes any and all combinations of one or more related enumerated items. In addition, when describing the embodiments of the present disclosure, the use of "may" relates to "one or more embodiments of the present disclosure". Expressions such as "at least one of ..." and "any one of ...", when following a column of elements, modify the entire column of elements without modifying the individual elements of the column. When phrases such as "at least one of A, B, and C", "at least one of A, B, or C", "at least one selected from the group of A, B, and C", or "at least one selected from the group of A, B, and C" are used to specify a column of elements A, B, and C, the phrase may refer to any and all suitable combinations or subsets of A, B, and C, such as A, B, C, A and B, A and C, B and C, or A and B and C. As used herein, the terms "use", "use ..." and "being used" may be considered to be synonymous with the terms "utilize", "utilize ..." and "being utilized", respectively. As used herein, the terms "substantially," "about," and similar terms are used as terms of approximation, rather than terms of degree, and are intended to account for the inherent variations in measurements or calculations that one of ordinary skill in the art would recognize.

[0040] It will be understood that although the terms first, second, third, etc. can be used here to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms are used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teachings of the example embodiments.

[0041] For ease of description, spatial relational terms such as "under", "below", "below", "above", "on", etc. may be used here to describe the relationship of an element or feature to another element or feature as shown in the figure. It will be understood that in addition to the orientations depicted in the figures, the spatial relational terms are also intended to cover other different orientations of the device in use or operation. For example, if the device in the figure is turned over, the elements described as being "under" or "under" other elements or features will be oriented to be "above" or "above" the other elements or features. Therefore, the term "under" can cover both above and below orientations. The device can be oriented in other ways (rotated 90 degrees or in other orientations), and the spatial relational descriptors used here should be interpreted accordingly.

[0042] The terms used herein are intended to describe embodiments of the present disclosure and are not intended to limit the present disclosure. As used herein, the singular form "a" is also intended to include the plural form, unless the context clearly indicates otherwise. It will be further understood that the terms "include", "includes ...", "includes" and / or "comprising ...", when used in this specification, indicate the existence of stated features, integers, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, integers, steps, operations, elements, parts and / or their groups.

[0043] In addition, any numerical range disclosed and / or described herein is intended to include all sub-ranges of the same numerical precision included in the described range. For example, the range of "1.0 to 10.0" is intended to include all sub-ranges between the described minimum value 1.0 and the described maximum value 10.0 (and including the described minimum value 1.0 and the described maximum value 10.0), that is, all sub-ranges with a minimum value equal to or greater than 1.0 and a maximum value equal to or less than 10.0, such as, for example, 2.4 to 7.6. Any maximum numerical limit described here is intended to include all lower numerical limits included therein, and any minimum numerical limit described in this specification is intended to include all higher numerical limits included therein. Therefore, the applicant reserves the right to modify this specification (including claims) to clearly describe any sub-range included in the scope clearly described here.

[0044] When two compared elements, features, etc. are referred to as "the same" it may mean that they are "substantially the same". Thus, the phrase "substantially the same" may include situations with deviations that are considered low in the art (e.g., 5% or less). In addition, when a parameter is referred to as being uniform in a given area, this may mean that it is uniform with respect to an average value.

[0045] Throughout the specification, unless stated otherwise, each element may be in the singular or in the plural.

[0046] Arranging an arbitrary element "on (or below)" or "upper (lower)" of another element may mean that the arbitrary element may be disposed in contact with the upper (or lower) surface of the element, and another element may also be inserted between the element and the arbitrary element disposed on (or below) the element.

[0047] In addition, it will be understood that when a component is referred to as being “linked,” “coupled” or “connected” to another component, the elements may be directly “coupled,” “linked” or “connected” to each other or the other component may be “interposed” between the components.

[0048] Throughout the specification, when "A and / or B" is stated, it means A, B, or A and B, unless otherwise stated. That is, "and / or" includes any or all combinations of the listed multiple items. When "C to D" is stated, it means C or more and D or less, unless otherwise specifically stated.

[0049] Some secondary batteries use semi-positive electrode plates on the outside of the electrode assembly to maximize capacity. When manufacturing the semi-positive electrode plates, the first surface of the substrate is a non-coating portion and the second surface is formed with an active material coating. After the active material coating is formed on the substrate, the electrode plate undergoes a pressing process, and due to the difference in elongation, the active material coating can be stretched more than the non-coating portion, resulting in curling in which the electrode plate is bent toward the non-coating portion. In the case where the electrode plate is bent due to the curling, slippage of the electrode plate may occur on the conveyor belt, vacuum errors may frequently occur on the conveyor belt during the conveyance of the adsorbed electrode plate, and the stacked electrode plates may be misaligned during the stacking of the electrode plates, thereby reducing productivity.

[0050] In contrast, example embodiments provide an electrode plate manufacturing apparatus for a secondary battery, an electrode plate manufacturing method for a secondary battery, and an electrode plate manufactured by the electrode plate manufacturing method, which prevent curling of the electrode plate.

[0051] Figure 1 Schematic diagram showing an example of an electrode plate manufacturing apparatus 10 according to an embodiment of the present disclosure is shown. Figure 1 As shown in the figure, the electrode plate manufacturing equipment 10 may include a controller 100, a supply reel 110, a pattern forming device (e.g., a patterner), a first drive 132, a slotting device 140, a feed roller 150, a second drive 152, a cutter 160, a conveyor belt 170, a transfer device 180 and a magazine 190.

[0052] The supply reel 110 may supply the substrate. Here, the substrate may be a single-sided substrate. That is, the substrate may be a single-sided substrate having a first surface (which is non-coated) and a second surface (at least a portion of which is formed with a coating (eg, an active material coating)).

[0053] According to an embodiment, the substrate may be wound around the supply reel 110 such that a first surface of the substrate (which is non-coated) faces outward (e.g., away from the supply reel 110), and a second surface (at least a portion of which is formed with a coating) faces inward (e.g., toward the supply reel 110). In addition, the supply reel 110 may supply the substrate such that the first surface of the substrate faces upward and the second surface of the substrate faces downward.

[0054] The pattern forming device may form a pattern on the substrate by passing the substrate between the support roller 120 and the polygonal roller 130 while pressurizing the substrate (e.g., the support roller 120 and the polygonal roller 130 may face each other and overlap each other). According to an embodiment, the support roller 120 may be positioned on a first side of the substrate, and the polygonal roller 130 may be positioned on a second side of the substrate, so that the support roller 120 may support the first surface of the substrate, and the polygonal roller 130 may form a pattern on the second surface of the substrate. For example, the support roller 120 may be positioned on the upper side of the substrate, and the polygonal roller 130 may be positioned on the lower side of the substrate, so that the support roller 120 may support the non-coated first surface, and the polygonal roller 130 may form a pattern on the second surface on which the coating is formed.

[0055] According to an embodiment, the polygonal roller 130 can be lifted and rotated, and the support roller 120 can pressurize the substrate and pass the substrate while rotating. For example, the controller 100 can control the first driver 132 so that the polygonal roller 130 can pressurize the substrate at a constant pressure. In detail, the first driver 132 can move (e.g., lift or lower) the polygonal roller 130 according to a control signal from the controller 100, so that the substrate can be pressurized at a certain pressure. The polygonal roller 130 can pressurize the substrate while rotating in a state lifted or lowered by the first driver 132, and the support roller 120 can support the pressurized substrate while rotating. For example, the support roller 120 can be a circular sponge roller.

[0056] The polygonal roller 130 may have a plurality of convex curved portions extending in the axial direction of the polygonal roller 130 and arranged in the circumferential direction of the polygonal roller 130 (for example, a plurality of convex blocks may be arranged along the entire outer circumference of the polygonal roller 130). According to an embodiment, each convex curved portion formed on the polygonal roller 130 may have a continuous curvature slope. That is, each convex curved portion formed on the polygonal roller 130 may have a smooth curved surface that is not angled (for example, a non-linear slope). By applying pressure using a convex curved portion having a smooth curved surface, a pattern can be formed on a substrate so that the substrate is not torn, and therefore, the curling of the substrate can be removed or reduced without damaging the substrate. The following will refer to Figure 5 and Figure 6 The detailed form and design of the polygonal roller 130 is described in more detail.

[0057] The slotting device 140 punches the substrate so that the substrate patterned by passing through the pattern forming device has the form of an electrode plate. For example, the slotting device 140 may punch the first side of the supplied substrate in the width direction so that a wiring piece may be formed on the first side of the supplied substrate in the width direction. In addition, the slotting device 140 may punch the second side of the supplied substrate in the width direction so that the length of the supplied substrate in the width direction may be reduced.

[0058] The feed roller 150 may move the substrate so that the substrate moves in the processing direction. According to an embodiment, the feed roller 150 may include a plurality of rollers. For example, the feed roller 150 may include a first roller on the upper side of the substrate and a second roller on the lower side of the substrate. The second driver 152 may rotate at least one of the rollers of the feed roller 150 according to a control signal from the controller 100. When at least one of the rollers of the feed roller 150 rotates, the substrate may move in the processing direction. In addition, at least one of the supply reel 110, the support roller 120, or the polygonal roller 130 may be rotated by a force generated when the substrate moves in the processing direction. For example, Figure 1 As shown in FIG. 1 , the feed roller 150 can be positioned between the slotting device 140 and the cutter 160 . In another example, the feed roller 150 can be positioned at any position between the supply reel 110 and the cutter 160 .

[0059] When the cutter 160 cuts the substrate with the tab formed thereon, an electrode plate can be made. In an embodiment, each substrate cut by the cutter 160 can become a single-sided electrode plate. The controller 100 can control the cutter 160 so that the substrate with the tab formed thereon is cut into a predetermined length.

[0060] The conveyor belt 170 may convey the manufactured electrode plate to the transfer device 180. Thereafter, the transfer device 180 may vacuum-absorb the conveyed electrode plate and transfer the electrode plate to the material storage box 190. The transferred electrode plates may be stacked in the material storage box 190.

[0061] According to an embodiment, curling of the patterned electrode plate can be removed or reduced so that the electrode plate can maintain a flat state, and thus, the electrode plate can be prevented from sliding on the conveyor belt 170. In addition, because the electrode plate maintains a flat state, vacuum errors can be prevented from occurring in the transfer device 180, and the alignment quality of the electrode plates stacked in the storage box 190 can be improved. Therefore, the loss in manufacturing the secondary battery can be reduced, and the safety of the secondary battery can be improved.

[0062] According to an embodiment, the controller 100 may control the operations of the first driver 132, the second driver 152, the slotting device 140, the cutter 160, the conveyor 170, and the transfer device 180. For example, the slotting device 140 and / or the cutter 160 may be controlled by the controller 100 with respect to the cycle, lifting / lowering height, pressure, etc., with which the slotting device 140 and / or the cutter 160 punch and / or cut the substrate.

[0063] The electrode plate manufactured by the above process may be included in a secondary battery. According to an embodiment, the single-sided electrode plate manufactured by the above process may be positioned on the outside (e.g., the uppermost side and the lowermost side) of the stacked electrode assembly. For example, the stacked electrode assembly may include a plurality of double-sided electrode plates manufactured by using a double-sided substrate having opposite surfaces on which a coating is formed, and may also include single-sided electrode plates manufactured by the above process and provided on the uppermost side and the lowermost side of the electrode assembly, respectively. The capacity of the electrode assembly may be increased by as much as the volume of the coating of the two single-sided electrode plates included in the electrode assembly. In addition, by arranging the single-sided electrode plates on the uppermost side and the lowermost side, respectively, the total thickness of the electrode assembly may be reduced.

[0064] Figure 2 2 is a cross-sectional view showing an example of a substrate 200 that is not patterned. Figure 1 An example of a substrate before being patterned with a pattern forming device or a substrate that has not been patterned and is manufactured by an electrode plate manufacturing apparatus without a pattern forming device.

[0065] Reference Figure 2, the substrate 200 shown may be a single-sided substrate having a first surface 210, which is non-coated, and a second surface 220, at least a portion of which is formed with a coating (e.g., an active material coating). The substrate having one surface on which the coating is formed undergoes a pressing process, and the second surface 220 on which the coating is formed is stretched more than the non-coated first surface 210 due to the difference in elongation during the pressing process. Therefore, curling may occur in which the substrate 200 is convexly bent so that the first surface 210 is an inner surface and the second surface 220 is an outer surface. As the substrate moves away from the supply reel, the curling may be more severe, and after the substrate is cut by the cutter, the curling may be more severe.

[0066] In the state where curling occurs, slippage of the electrode plate may occur on the conveyor belt, vacuum errors may frequently occur on the conveyor belt during the conveyance of the adsorbed electrode plate, and the stacked electrode plates may be misaligned during the stacking of the electrode plates, and thus, productivity may be reduced. Figure 1 The polygonal roller 130 forms a pattern on the substrate to prevent or reduce curling, as will be described below with reference to Figure 3 Described in more detail.

[0067] Figure 3 The present invention is shown in the embodiment of the present invention. Figure 1 A view of an example of a pattern forming device forming a pattern on a supplied substrate. The supplied substrate may be a single-sided substrate having a first surface (which is non-coated) and a second surface (at least a portion of which is formed with a coating (eg, an active material coating)).

[0068] Reference Figure 3 , the substrate 310 before passing through the pattern forming device may have a curl ( Figure 3 The left side of the support roller 120 and the polygonal roller 130 in FIG. Figure 3 As shown in FIG. , the substrate 310 may be convexly curved so that the first surface ( Figure 3 The upper side in the coating) is the inner surface and is non-coated, and the second surface ( Figure 3 The lower side in the figure) is the outer surface and is coated.

[0069] According to example embodiments, the pattern forming device may form a pattern on the substrate 310 by passing the substrate 310 between the support roller 120 and the polygonal roller 130 while pressurizing the substrate 310. For example, the support roller 120 may be positioned on a first surface side of the substrate 310, and the polygonal roller 130 may be positioned on a second surface side of the substrate 310, so that the support roller 120 may support the first surface and the polygonal roller 130 may form a pattern on the second surface.

[0070] The substrate 310 may be reversely bent by the convex curved portion formed in the polygonal roller 130. That is, when the convex curved portion of the polygonal roller 130 presses the second surface of the substrate 310, a pattern bent in the opposite direction of the curling may be formed on the substrate 310 to form a patterned substrate 320 after passing through the pattern forming device.

[0071] According to an embodiment, the convex curved portion of the polygonal roller 130 may extend in the axial direction of the polygonal roller 130 and may be arranged in the circumferential direction of the polygonal roller 130. In an embodiment, the axis of the polygonal roller 130 refers to the rotation axis of the polygonal roller 130 (for example, it may extend to Figure 3 ), and may be parallel to the width direction of the substrate 310. In this case, the convex curved portion of the polygonal roller 130 extending longitudinally in the axial direction of the polygonal roller 130 may contact (e.g., directly contact) the second surface of the substrate 310 (e.g., along the entire width of the substrate 310), and thus the patterned substrate 320 obtained after passing through the pattern forming device may have a pattern elongated in the width direction of the patterned substrate 320.

[0072] In addition, while the polygonal roller 130 rotates, the substrate 310 is repeatedly pressed by a plurality of convex curved portions arranged in the circumferential direction of the polygonal roller 130, whereby the patterned substrate 320 after passing through the pattern forming device may have a pattern repeatedly formed at predetermined intervals in the longitudinal direction of the patterned substrate 320 (i.e., along the moving direction of the patterned substrate 320). Therefore, the curl of the substrate 310 may be removed or reduced after passing through the pattern forming device.

[0073] In an embodiment, the polygonal roller 130 may have a higher hardness than the supporting roller 120. For example, the polygonal roller 130 may be made of one or more materials including metal. For example, the polygonal roller 130 may be made of a stainless steel material (e.g., SUS 304, etc.), or may further include a metal coating (e.g., titanium coating, etc.) containing a stainless steel material. In some embodiments, the supporting roller 120 may be made of, for example, sponge, silicon, etc. (which has a lower hardness than the polygonal roller 130).

[0074] Figure 4 shows the substrate according to the use of Figure 1 An example of a process of manufacturing an electrode plate by an electrode plate manufacturing apparatus varying according to the process of manufacturing the electrode plate.

[0075] Reference Figure 4, the first section 410 represents an example of a substrate before passing through a pattern forming device but after the substrate is supplied by the supply reel 110. The supplied substrate may be a single-sided substrate having a first surface (which is non-coated) and a second surface (which includes a first region 412 formed with a coating and a non-coated second region 422). Here, the tab 442 of the electrode plate 440 may be formed in the second region 422, and the surfaces opposite to each other of the second region 422 are non-coated. Figure 4 A second surface of the substrate is shown.

[0076] The second section 420 represents an example of a substrate after passing through the pattern forming device and before passing through the slotting device 140. A pattern extending in the width direction of the substrate can be repeatedly formed on the substrate of the second section 420 in the length direction of the substrate by the polygonal roller 130 having a plurality of convex curved portions extending in the axial direction and arranged in the circumferential direction. Therefore, the curl of the substrate can be removed or reduced.

[0077] The third section 430 represents an example of a substrate after passing through the notching device 140 and before passing through the cutter 160. The first side (the second region 422 side) of the substrate in the width direction may be punched by the notching device 140, whereby a lug may be formed on the first side (the second region 422 side) of the substrate in the third section 430. In addition, the second side (which is opposite to the first side) of the substrate in the width direction may be punched, whereby the length of the substrate in the width direction in the third section 430 may be reduced.

[0078] The electrode plate 440 may be manufactured by passing the substrate in the third section 430 where the tab is formed and cutting the substrate. According to an embodiment, the length h1 of the substrate in the width direction ( Figure 4 ) may be smaller than the length h2 of the polygonal roller 130 in the axial direction ( Figure 5 ), therefore, a pattern may also be formed in the tab 442 of the electrode plate 440. The tab 442 may be kept flat to prevent the tab 442 from sagging, and the quality of the tab 442 may be maintained.

[0079] Figure 5 An example of the polygonal roller 130 and a cross section 510 of the polygonal roller 130 cut in a direction perpendicular to the axial direction of the polygonal roller 130 are shown.

[0080] Reference Figure 5According to an embodiment, the polygonal roller 130 may be a roller in which a plurality of convex curved portions having a first radius of curvature and a plurality of concave curved portions having a second radius of curvature are alternately formed in the circumferential direction of the polygonal roller 130. For example, the polygonal roller 130 may include a first convex curved portion, a first concave curved portion, a second convex curved portion, a second concave curved portion, ..., an nth convex curved portion, and an nth concave curved portion sequentially formed in the circumferential direction. For example, the first radius of curvature of the convex curved portion may be smaller than the second radius of curvature of the concave curved portion. In another example, the convex curved portion and the concave curved portion may each have a certain radius of curvature.

[0081] The convex curved portion and the concave curved portion formed on the polygonal roller 130 may extend in the axial direction of the polygonal roller 130. When the curved portion of the polygonal roller 130 contacts the substrate, an uneven pattern extending in the width direction of the substrate may be formed on the substrate, and thus, curling of the substrate may be prevented. According to an embodiment, the length h2 of the polygonal roller 130 in the axial direction may be greater than the length h1 of the substrate in the width direction. Therefore, since the uneven pattern may be formed on the entire substrate in the width direction, the uneven pattern may also be formed on the wiring sheet. Therefore, curling of the wiring sheet may be prevented, so that the wiring sheet remains flat and does not sag. Therefore, the quality of the wiring sheet may be prevented from being reduced during transportation, and thus the quality of the wiring sheet may be maintained.

[0082] Each convex curved portion may be a curved surface having a continuously formed slope. That is, each convex curved portion formed on the polygonal roller 130 may form a smooth curved surface without an angle. Therefore, the polygonal roller 130 may form a reverse curved pattern on the substrate in the opposite direction of the curling to prevent the substrate from tearing, and thus, the curling of the substrate may be reduced without damaging the substrate.

[0083] A cross section 510 of the polygonal roller 130 cut in a direction perpendicular to the axial direction may include a plurality of raised portions corresponding to the convex curved portions, respectively, and a plurality of recessed portions corresponding to the concave curved portions, respectively. Each raised portion may have the same radius of curvature (first radius of curvature) as each convex curved portion, and each recessed portion may have the same radius of curvature (second radius of curvature) as each concave curved portion. The shape of the polygonal roller 130 may be determined according to various parameters, and by appropriately designing the shape of the polygonal roller 130, the curling of the substrate may be effectively reduced while preventing damage to the substrate. This is described below with reference to Figure 6 Detailed description.

[0084] Figure 6 Shows the display Figure 51 is an enlarged view of a portion of a cross section of the polygonal roller 130. As described above, the cross section of the polygonal roller 130 cut in a direction perpendicular to the axial direction may alternatively include a convex portion having a first radius of curvature and a concave portion having a second radius of curvature in the circumferential direction.

[0085] Important parameters for determining the shape of the polygonal roller 130 may include the number of protrusions (the number of convex curved portions), an X value, a first curvature radius R1 of each protrusion, a second curvature radius R2 of each concave portion, an angle of a tangent line of each protrusion, and the like.

[0086] The number of raised portions refers to the number of raised portions (convex curved portions) arranged in the circumferential direction of the polygonal roller 130, and parameters such as an angle between two adjacent raised portions 610 and 620_1, a pitch indicating the length of the outermost circumference between two adjacent raised portions 610 and 620_1, etc. may be determined according to the number of raised portions. The number of raised portions may affect the intervals between patterns formed on the substrate.

[0087] The X value refers to the distance between the intersection of the tangent at the starting point of the raised portion 610 and the arc and the intersection of the tangent at the end point of the raised portion 610 and the arc. Here, the arc may be a part of the outermost circumference of the polygonal roller, and refers to a virtual arc passing through the midpoint of the raised portion 610 and the midpoints of the two raised portions 620_1 and 620_2 adjacent to the raised portion 610. The X value may affect the length (area) of the operating surface of the convex curved portion of the polygonal roller 130 on which the substrate is pressed. In a state where the X value is too small, the substrate may be damaged (e.g., pits), and in a state where the X value is too large, the curling of the substrate may not be fully reduced. For example, the polygonal roller 130 may have an X value greater than or equal to 0.4 mm and less than or equal to 1 mm, such as an X value of about 0.6 mm, so that the curling of the substrate can be effectively removed or reduced without damaging the substrate. In another example, the X value range may vary depending on various factors (e.g., the physical properties of the substrate and the polygonal roller).

[0088] The first curvature radius R1 and the second curvature radius R2 respectively represent the curvature radius of the convex portion 610 or 620_1 and 620_2 and the curvature radius of the concave portion 630 .

[0089] The angle of the tangent of the raised portion refers to the angle between the tangent at the starting point of the raised portion 610 and the tangent at the end point of the raised portion 610. The angle of the tangent of the raised portion can affect the depth at which the convex curved portion of the polygonal roller presses the substrate. In a state where the operating depth is too deep, the substrate may be damaged, and therefore, the polygonal roller 130 may be designed by using an appropriate angle.

[0090] By changing important parameters for determining the shape of the polygonal roller, polygonal rollers of types A to E are designed as shown in Table 1 below.

[0091] Table 1

[0092]

[0093]

[0094] As a result of conducting experiments using polygonal rollers of types A to E to form patterns on a substrate, a C-type polygonal roller having an X value of 0.6 mm, a first curvature radius R1 of 1 mm, and a second curvature radius R2 of 2 mm can most effectively remove curl of the substrate without damaging the substrate.

[0095] Figure 7 Examples comparing electrode plates manufactured under various pressure conditions according to various embodiments of the present disclosure are shown. Figure 7 The first electrode plate 710, the second electrode plate 720, the third electrode plate 730, the fourth electrode plate 740, and the fifth electrode plate 750 shown in the figure may each have an upper surface and a lower surface, at least a portion of the upper surface (a portion other than the wiring tab) is formed with a coating, and the lower surface is non-coated. The first electrode plate 710 represents a comparative example of an electrode plate manufactured by an electrode plate manufacturing apparatus without a pattern forming device of an example embodiment.

[0096] Reference Figure 7 , it can be seen that the first electrode plate 710 includes curling and convexly bending, so that the upper surface (coating) of the electrode plate 710 is the outer surface, and the lower surface (non-coating surface) is the inner surface. In a state where curling occurs in this way, productivity may be reduced due to various problems in the manufacturing process. In addition, it can be seen that the terminal tab of the first electrode plate 710 is rolled up. In a state where the terminal tab is not flat in this way, the terminal tab may be damaged during the conveying process, thereby, the quality of the terminal tab may be reduced.

[0097] The second electrode plate 720, the third electrode plate 730, the fourth electrode plate 740, and the fifth electrode plate 750 are examples of electrode plates on which patterns are formed and manufactured by the electrode plate manufacturing apparatus according to an embodiment of the present disclosure. According to an embodiment, the controller of the electrode plate manufacturing apparatus 10 may control the first driver (e.g., an electric pneumatic regulator, etc.) so that the polygonal roller 130 presses the substrate at a constant pressure, and the first driver may operate the polygonal roller 130 so that the substrate is pressurized at a constant pressure according to a control signal from the controller. Figure 7As shown in FIG. 1 , the polygonal roller 130 presses the substrate with a gradually decreasing pressure from the second electrode plate 720 toward the fifth electrode plate 750 to form a pattern. For example, in the case of manufacturing the second electrode plate 720, the third electrode plate 730, the fourth electrode plate 740, and the fifth electrode plate 750, the pressure (i.e., the pressure per unit area) at which the polygonal roller 130 presses the substrate may be 3 kgf / cm 2 in the following order: 2 , 1kgf / cm 2 、0.7kgf / cm 2 and 0.5kgf / cm 2 .

[0098] Reference Figure 7 , it can be seen that reverse curling occurs in the second electrode plate 720 and the third electrode plate 730 due to excessive reverse bending according to the high voltage. It can be seen that the fourth electrode plate 740 maintains flatness by removing the curling due to appropriate pressure, and the tab formed on the fourth electrode plate 740 also maintains flatness. It can be seen that although the existing curling of the fifth electrode plate 750 has been partially alleviated, it is not completely removed due to the small pressure, so the existing curling still remains, and the tab formed on the fifth electrode plate 750 is also curled up.

[0099] Therefore, if Figure 7 As can be seen from the above description, in the case where the pressure at which the polygonal roller presses the substrate is too low, the curl may not be removed, and in the case where the pressure is too high, the curl may occur in the reverse direction. For example, the substrate may have to be pressurized under appropriate pressure conditions, and this can be achieved by pressing the substrate with a pressure greater than or equal to 0.5 kgf / cm 2 And less than or equal to 0.8kgf / cm 2 (For example 0.7kgf / cm 2 ) pressure to pressurize the substrate to remove or reduce the curl. In another example, the pressure range can be changed depending on various factors (such as the physical properties of the substrate and the polygonal roller 130).

[0100] Figure 8 1 shows an example of transferring electrode plates according to an embodiment of the present disclosure. According to an embodiment, the transfer device 180 can vacuum adsorb the electrode plates and transfer the electrode plates to a storage box where the electrode plates are stacked. According to the first example, Figure 8 As shown in part (a) of , the first electrode plate 810 manufactured by the electrode plate manufacturing apparatus without the pattern forming device of the example embodiment and having curling is transferred by the transfer device 180. According to the second example, as Figure 8 As shown in part (b) of , the second electrode plate 820 which is manufactured by the electrode plate manufacturing apparatus according to an embodiment of the present disclosure and whose curl is removed or reduced is transferred by the transfer device 180 .

[0101] Reference Figure 8 , in the first example ( Figure 8 In the part (a) of the embodiment, due to the curling of the first electrode plate 810, vacuum errors may frequently occur between the transfer device 180 and the first electrode plate 810, and thus, the transfer device 180 may not vacuum adsorb and transfer the electrode plate 810 smoothly, resulting in reduced productivity. In contrast, in the second example ( Figure 8 In part (b)), curling can be removed or reduced in the second electrode plate 820, and thus, the frequency of vacuum errors occurring between the transfer device 180 and the second electrode plate 820 can be reduced, thereby improving productivity.

[0102] Fig. 9 is a configuration diagram showing an example of an electrode plate manufacturing apparatus 900 according to another embodiment of the present disclosure. Fig. 9 The electrode plate manufacturing apparatus 900 may further include a heater in front of the pattern forming device of the electrode plate manufacturing apparatus. Figure 1 The description made may be equally or similarly applied to Fig. 9 The remaining components of the electrode plate manufacturing apparatus 900 except the heater.

[0103] like Fig. 9 As shown in FIG. 1 , the heater in the electrode plate manufacturing apparatus 900 may include a heating roller 930 that heats the substrate, and a first guide roller 910 and a second guide roller 920 that guide the substrate through the heating roller 930 by closely contacting the heating roller 930. For example, the first guide roller 910 may be positioned in front of the heating roller 930, and the second guide roller 920 may be positioned behind the heating roller 930. In addition, the controller 100 may control the temperature of the heating roller 930.

[0104] According to an embodiment, the heating roller 930 may be positioned on the second surface side of the substrate to heat the second surface of the substrate, and the first guide roller 910 and the second guide roller 920 may be positioned on the first surface side of the substrate to support the first surface of the substrate. For example, the substrate may pass through the space between the first guide roller 910 and the heating roller 930 in a state where the first surface of the substrate faces the first guide roller 910 and the second surface faces the heating roller 930. Then, the substrate may pass through the space between the heating roller 930 and the second guide roller 920 in a state where the first surface of the substrate faces the second guide roller 920 and the second surface faces the heating roller 930. Therefore, the substrate may pass through the heating roller 930 in a state of close contact with the heating roller 930, and as a result, the substrate (that is, the second surface of the substrate at least a portion of which is formed with a coating) may be heated. As the substrate is heated, the ductility of the substrate increases, and thus, a pattern may be better formed by a pattern forming device.

[0105] Fig.10 1 is a flowchart showing an example of an electrode plate manufacturing method 1000 according to an embodiment of the present disclosure. According to an embodiment, the electrode plate manufacturing method 1000 may be manufactured by an electrode plate manufacturing apparatus (e.g., Fig. 9 The method is performed by an electrode plate manufacturing device, etc., wherein the electrode plate manufacturing device includes a controller, a supply reel, a heater, a pattern forming device, a slotting device, a cutter and a transfer device.

[0106] First, a supply reel may supply a substrate having a first surface (which is non-coated) and a second surface (at least a portion of which is coated) (S1010). For example, the supply reel may supply the substrate so that the first surface of the substrate faces upward and the second surface of the substrate, at least a portion of which is coated, faces downward.

[0107] The heater may heat the supplied substrate (S1020). According to an embodiment, the heater may include a heating roller and at least one guide roller, the heating roller heating the substrate, and the at least one guide roller guiding the substrate to pass through the heating roller in a state of close contact with the heating roller. For example, the heater may include a heating roller, a first guide roller positioned in front of the heating roller, and a second guide roller behind the heating roller. According to an embodiment, the heating roller may be positioned on the second surface side of the substrate to heat the second surface of the substrate, and the first guide roller and the second guide roller may be positioned on the first surface side of the substrate to support the first surface of the substrate. Therefore, the substrate (that is, the second surface of the substrate at least a portion of which is formed with a coating) may be heated. Since the substrate is heated, the ductility of the substrate increases, whereby a pattern may be better formed by a pattern forming device.

[0108] The pattern forming device can form a pattern on the substrate by passing the heated substrate between a polygonal roller having a plurality of convex curved portions formed thereon and a supporting roller while pressurizing the substrate (S1030). According to an embodiment, the controller can control the first driver so that the polygonal roller presses the substrate with a predetermined pressure, and the first driver can raise and lower the polygonal roller according to a control signal from the controller.

[0109] According to an embodiment, the support roller may be positioned on the first surface side of the substrate to support the first surface of the substrate, and the polygonal roller may be positioned on the second surface side of the substrate to pressurize the second surface of the substrate. Therefore, the convex curved portion of the polygonal roller presses the substrate from the second surface of the substrate, thereby forming a pattern on the substrate so that the substrate is bent in the opposite direction of the curling.

[0110] In an embodiment, the polygonal roller may have a higher hardness than the support roller. For example, the polygonal roller may be made of one or more materials including metal. For example, the polygonal roller may be made of a stainless steel material (e.g., SUS 304, etc.), or may further include a metal coating (e.g., titanium coating, etc.) containing a stainless steel material. In some embodiments, the support roller 120 may be made of, for example, sponge, silicon, etc. (which has a lower hardness than the polygonal roller 130).

[0111] According to an embodiment, the polygonal roller may be a roller in which a plurality of convex curved portions having a first curvature radius and a plurality of concave curved portions having a second curvature radius are alternately formed. In an embodiment, the first curvature radius of the convex curved portion may be smaller than the second curvature radius of the concave curved portion.

[0112] The convex curved portion formed on the polygonal roller may extend in the axial direction of the polygonal roller and may be arranged in the circumferential direction of the polygonal roller. When the curved portion of the polygonal roller contacts the substrate, an uneven pattern extending in the width direction of the substrate may be formed on the substrate, and thus, curling of the substrate may be prevented. Here, each convex curved portion may be a curved surface in which the slope of the curved surface is continuously formed. That is, each convex curved portion formed on the polygonal roller may have a smooth curved surface that is not angled.

[0113] A cross section cut in a direction perpendicular to the axial direction of the polygonal roller may include a plurality of raised portions corresponding to the plurality of convex curved portions, respectively. According to an embodiment, the raised portions may each have a distance greater than or equal to 0.4 mm and less than or equal to 1 mm between the intersection of the tangent at the starting point of the raised portion and the intersection of the tangent at the end point of the raised portion and the arc. Here, the arc may be a virtual arc passing through the midpoint of the raised portion and the midpoints of two raised portions adjacent to the raised portion. Since the convex curved portion formed to have a smooth curved surface and appropriately designed pressurizes the substrate, a reverse bending pattern in the opposite direction of the curling can be formed on the substrate to prevent the substrate from tearing, and therefore, the curling of the substrate can be reduced without damaging the substrate.

[0114] According to an embodiment, the length of the polygonal roller in the axial direction may be greater than the length of the substrate in the width direction. Therefore, when an uneven pattern is formed on the substrate along the entire width direction, an uneven pattern may also be formed on the tab. Therefore, the tab may be prevented from curling, so that the tab remains flat without sagging. Therefore, the quality of the tab may be prevented from being reduced during transportation, and the quality of the tab may be maintained.

[0115] The slotting device can punch the substrate with the pattern formed thereon, so that the wiring tab can be formed (S1040). In addition, the cutter can cut the substrate with the wiring tab formed thereon to manufacture the electrode plate (S1050). According to an embodiment, the slotting device and / or the cutter can be raised or lowered according to a control signal from a controller. That is, the slotting device and / or the cutter can be controlled by the controller with its cycle of punching and / or cutting the substrate, raising / lowering height, pressure, etc.

[0116] The transfer device can vacuum adsorb the electrode plate and transfer the electrode plate to the storage box (S1060). For example, a conveyor belt can transfer the electrode plate to the transfer device, and the transfer device can vacuum adsorb the transferred electrode plate and transfer the electrode plate to the storage box. The transferred electrode plates can be stacked in the storage box.

[0117] According to an embodiment, the electrode plate manufacturing apparatus may include a feed roller for moving the substrate in the processing direction. For example, the controller may control the second driver, and the second driver may rotate the feed roller according to a control signal from the controller. When the feed roller rotates, the substrate may move in the processing direction. In addition, at least one of the supply reel, the guide roller, the heating roller, the support roller, or the polygonal roller may rotate by the force generated when the substrate moves in the processing direction.

[0118] Fig.10 The flowchart and the above description are merely examples of the present disclosure, and the scope of the present disclosure is not limited to Fig.10 For example, one or more steps in the flowchart and the above description may be added, changed or removed, the order of one or more steps may be changed, and one or more steps may be performed simultaneously.

[0119] According to some embodiments of the present disclosure, a pattern that is bent in the opposite direction of curling can be formed on the electrode plate, so that curling can be removed or reduced, the electrode plate can be kept in a flat state, and the electrode plate can be prevented from sliding on the conveyor belt. In addition, because the electrode plate is kept in a flat state, vacuum errors can be prevented from occurring in the transfer device, and the alignment quality of the electrode plates stacked in the storage box can be improved. Therefore, the loss in manufacturing the secondary battery can be reduced, and the safety of the secondary battery can be improved.

[0120] According to some embodiments of the present disclosure, the convex curved portion of the polygonal roller is formed as a smooth curved surface, and the curvature, etc. are appropriately designed, so that a reverse curved pattern in the opposite direction of the curling can be formed on the substrate to prevent the substrate from tearing. Therefore, the curling of the substrate can be removed or reduced without damaging the substrate.

[0121] According to some embodiments of the present disclosure, a pattern is formed on a tab of an electrode plate to maintain the tab in a flat state, and thus sagging of the tab may be prevented and the quality of the tab may be maintained during a transfer process.

[0122] According to some embodiments of the present disclosure, the substrate is heated before patterning, and thus, the pattern can be better formed and the curling can be effectively removed or reduced.

[0123] Although the present disclosure has been described above with respect to the embodiments of the present disclosure, the present disclosure is not limited thereto. Within the spirit of the present disclosure and the equivalent scope of the appended claims, those skilled in the art may make various modifications and changes to the present disclosure.

Claims

1. An electrode plate manufacturing device for a secondary battery, the device comprising: a supply reel configured to supply a substrate having an uncoated first surface and an at least partially coated second surface; as well as A patterner is adjacent to the supply reel, the patterner comprising a polygonal roller and a support roller facing each other, the patterner being configured to pattern the substrate passing between the polygonal roller and the support roller, the polygonal roller comprising a convex curved portion extending in an axial direction of the polygonal roller and arranged in a circumferential direction of the polygonal roller. 2 . The electrode plate manufacturing apparatus according to claim 1 , wherein each of the convex curved portions has a continuous slope.

3. The electrode plate manufacturing equipment according to claim 1, wherein: A cross section in a direction perpendicular to the axial direction of the polygonal roller includes convex portions corresponding to the convex curved portions, respectively, Each of the convex portions has a distance between an intersection point of a tangent line at a start point of each of the convex portions and an intersection point of a tangent line at an end point of each of the convex portions and an arc of greater than or equal to 0.4 mm and less than or equal to 1 mm, and Each of the circular arcs is a virtual arc that passes through a midpoint of one of the convex portions and midpoints of two convex portions adjacent to the one convex portion.

4. The electrode plate manufacturing equipment according to claim 1, wherein: Each of said convexly curved portions has a first radius of curvature, The polygonal roller further includes concave curved portions alternating with the convex curved portions, each of the concave curved portions having a second radius of curvature, and The first radius of curvature is smaller than the second radius of curvature.

5. The electrode plate manufacturing equipment according to claim 1, wherein: The supporting roller is positioned on the first surface of the substrate to support the first surface of the substrate, and The polygonal roller is positioned on the second surface of the substrate to pressurize the second surface of the substrate. 6 . The electrode plate manufacturing apparatus according to claim 1 , wherein the supply reel is configured to supply the substrate such that the first surface of the substrate faces upward and the second surface of the substrate faces downward, and the polygonal roller is positioned on a lower side of the substrate.

7. The electrode plate manufacturing equipment according to claim 1, further comprising: a first drive configured to raise and lower the polygonal roller; as well as A controller is configured to control the first driver so that the polygonal roller presses the substrate with a pressure less than a predetermined pressure. 8 . The electrode plate manufacturing apparatus according to claim 1 , further comprising a heater in front of the patterner.

9. The electrode plate manufacturing apparatus according to claim 8, wherein the heater comprises a heating roller and at least one guide roller, the heating roller being configured to heat the substrate, and the at least one guide roller being configured to guide the substrate so that the substrate passes through the heating roller by being in close contact with the heating roller.

10. The electrode plate manufacturing equipment according to claim 9, wherein: the heating roller is positioned on the second surface of the substrate to heat the second surface of the substrate, and The at least one guide roller is positioned on the first surface of the substrate to support the first surface of the substrate. 11 . The electrode plate manufacturing apparatus according to claim 1 , wherein the polygonal roller has a higher hardness than the support roller. 12 . The electrode plate manufacturing apparatus according to claim 1 , wherein the support roller is a sponge roller.

13. The electrode plate manufacturing equipment according to claim 1, further comprising: a slotting device configured to punch the substrate through the patterner to form a terminal tab; a cutter configured to cut the substrate passed through the slotting device to form an electrode plate; a controller configured to control the slotting device and the cutter; as well as A material storage box is configured to stack the electrode plates made by the cutter. 14 . The electrode plate manufacturing equipment according to claim 13 , further comprising a transfer device configured to vacuum-absorb the electrode plate and transfer the electrode plate to the material storage box.

15. The electrode plate manufacturing equipment according to claim 1, further comprising: a feed roller configured to move the substrate in a process direction; a second driver configured to rotate the feed roller; as well as A controller is configured to control the second driver. 16 . The electrode plate manufacturing apparatus according to claim 1 , wherein a length of the polygonal roller in the axial direction is greater than a length of the substrate in a width direction.

17. A method for manufacturing an electrode plate for a secondary battery, the method comprising: supplying a substrate having an uncoated first surface and an at least partially coated second surface; as well as forming a pattern on the substrate by passing the substrate between a polygonal roller on which a plurality of convex curved portions are formed and a support roller while pressurizing the substrate, The convexly curved portion extends in the axial direction of the polygonal roller and is arranged in the circumferential direction of the polygonal roller. 18 . The method of claim 17 , wherein forming the pattern on the substrate comprises forming an uneven pattern extending in a width direction of the substrate to prevent curling of the substrate. 19 . The method of claim 17 , wherein forming the pattern on the substrate comprises forming an uneven pattern on a tab extending from the substrate to prevent curling of the tab.

20. An electrode plate for a secondary battery manufactured by the electrode plate manufacturing method according to claim 17.

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