Electrode manufacturing apparatus

Abstract

The present invention provides an electrode manufacturing apparatus (10) comprising: a pattern forming unit (100) for forming a pattern and separable scraps (52) on an electrode sheet (50); a roller (200) which rotates around a rotary shaft (210) and transfers the electrode sheet (50) having the pattern and scraps (52) formed therein; a suction pipe (300) disposed adjacent to the roller (200), connected to a suction device, opened toward the roller (200), and sucking the scraps (52) separated from the electrode sheet (50); and an airflow control unit (400) including a first surface (410) adjacent to and facing the roller (200) with the scraps (52) interposed therebetween. The first surface (410) may include a first portion (412), to which the distance from the roller (200) gradually decreases as the distance from the suction pipe (300) increases. When negative pressure is applied to the suction pipe (300), air can pass between the roller (200) and the first surface (410) and flow into the suction pipe (300).

Description

Electrode manufacturing equipment

[0001] This application claims the benefit of priority from Republic of Korea Patent Application No. 10-2024-0095984, dated July 19, 2024, the entire contents of which are incorporated herein by reference.

[0002] The present invention relates to an electrode manufacturing device, and more particularly, to an electrode manufacturing device in which an air current flowing along the outer surface of a roller is dispersed or weakened so that scrap is stably separated from an electrode sheet and / or a roller.

[0003] Secondary batteries are manufactured by applying an active material to the surface of an electrode collector to form an electrode (anode, cathode), interposing a separator between the electrodes to form an electrode assembly, and then mounting the electrode assembly inside a cylindrical or square metal can or a pouch-shaped case made of aluminum laminate sheet. The electrode assembly is manufactured in various sizes depending on the size, shape, and capacity of the case. During this process, a notching process is essential, in which the electrodes and separator constituting the electrode assembly are cut to a predetermined size and shape according to the shape of the cell and unnecessary parts are removed.

[0004] This notching process can separate the electrode sheet supplied from the supply unit into the electrode part to be used and the scrap to be discarded by cutting it into the required shape and size. In the past, the scrap was removed by sucking the scrap as the notched electrode sheet (50) passed through a roller (Fig. 4).

[0005] However, the air current (W1, Fig. 4) flowing along the outer surface of the roller, formed by the Coanda effect, prevents the scrap from being separated and removed. If the scrap is not separated and removed, the electrode manufacturing process may need to be stopped and the scrap must be manually separated, which may result in equipment malfunction or electrode manufacturing defects. Therefore, a method is needed to resolve the problem of scrap not being separated by the air current caused by the Coanda effect.

[0006] Prior art literature related to this is Korean Patent Publication No. 10-2023-0165641.

[0007] The present invention has been devised to solve the above-described problem, and its purpose is to provide an electrode manufacturing device in which an air current flowing along the outer surface of a roller is dispersed or weakened so that scrap is stably separated from an electrode sheet and / or roller.

[0008] The purpose of the present invention is to provide an electrode manufacturing device that reduces the defect rate in electrode manufacturing.

[0009] The purpose of the present invention is to provide an electrode manufacturing device that has a simple configuration, is low-cost, has improved scrap removal performance, and can be used without major modification to an existing electrode manufacturing device or as is.

[0010] The purpose of the present invention is to provide an electrode manufacturing device that effectively and stably removes scrap.

[0011] The purpose of the present invention is to provide an electrode manufacturing device that prevents malfunction of the device or defects in electrode manufacturing.

[0012] The purpose of the present invention is to provide an electrode manufacturing device that minimizes foreign substances, dust, etc. from escaping from the space between a suction tube and a roller.

[0013] The technical objectives of the present invention are not limited to the purposes mentioned above. Other objectives and advantages of the present invention not mentioned above can be understood through the following description and will be more clearly understood through the embodiments of the present invention. Furthermore, it will be readily apparent that the objectives and advantages of the present invention can be realized by the means and combinations thereof set forth in the claims.

[0014] In order to solve the above-described problem, the present invention provides an electrode manufacturing device (10) including a pattern forming unit (100), a roller (200), a suction tube (300), and an airflow control unit (400).

[0015] The above pattern forming unit (100) can form a pattern and a separable scrap (52) on the electrode sheet (50).

[0016] The above roller (200) can rotate around the rotation axis (210).

[0017] The above roller (200) can transport the electrode sheet (50) on which the pattern and scrap (52) are formed.

[0018] The above suction pipe (300) can be placed adjacent to the roller (200).

[0019] The above suction tube (300) can be connected to an inhaler.

[0020] The above suction pipe (300) can be opened toward the roller (200).

[0021] The above suction tube (300) can suck the scrap (52) separated from the electrode sheet (50).

[0022] The above airflow control unit (400) may be configured to include a first surface (410).

[0023] The above first surface (410) can be adjacent to and face the roller (200) with the scrap (52) therebetween.

[0024] The above first side (410) may include a first portion (412).

[0025] The above first portion (412) may be a portion where the distance from the roller (200) gradually decreases as it moves away from the suction pipe (300).

[0026] When negative pressure is applied to the suction pipe (300), air can pass between the roller (200) and the first surface (410) and flow into the suction pipe (300).

[0027] In one embodiment, the first portion (412) can disperse the first air flow (W1) flowing along the outer surface of the roller (200).

[0028] In one embodiment, the first side (410) may include a second portion (414).

[0029] The second portion (414) can be connected to the end of the first portion (412) that is furthest from the suction pipe (300).

[0030] The above second portion (414) may be a portion where the distance from the roller (200) gradually increases as it moves away from the suction pipe (300).

[0031] In one embodiment, in a cross-section perpendicular to the rotation axis (210), the first portion (412) and the second portion (414) may form a line that protrudes convexly toward the roller (200).

[0032] In one embodiment, the first surface (410) may include a curved surface (C) that forms a curve in a cross-section perpendicular to the rotation axis (210).

[0033] In one embodiment, the first surface (410) may include a flat portion (L) that forms a straight line in a cross-section perpendicular to the rotation axis (210).

[0034] In one embodiment, the second portion (414) may include a curved portion (C) that forms a curve in a cross-section perpendicular to the rotation axis (210).

[0035] In one embodiment, the first portion (412) may include a flat portion (L) that forms a straight line in a cross-section perpendicular to the rotation axis (210).

[0036] In one embodiment, the airflow control unit (400) may be coupled to the suction pipe (300).

[0037] The above first surface (410) can be connected to the inner surface of the suction pipe (300).

[0038] In one embodiment, the pattern forming unit (100) can form the pattern and scrap (52) on one end of the width direction of the electrode sheet (50).

[0039] In the width direction of the electrode sheet (50), one end of the first surface (410) may correspond to one end of the scrap (52) or may be located on one side of the scrap (52).

[0040] In the width direction of the electrode sheet (50), the other end of the first surface (410) may correspond to or be adjacent to the other end of the scrap (52).

[0041] In one embodiment, the width of the first side (410) may correspond to the width of the scrap (52).

[0042] In one embodiment, the pattern forming unit (100) can form the pattern and scrap (52) on one side of the width direction of the electrode sheet (50).

[0043] The suction pipe (300) can be placed at a position corresponding to one side of the electrode sheet (50) in the width direction of the electrode sheet (50).

[0044] In one embodiment, the first surface (410) may face the first outer surface (220).

[0045] The first outer surface (220) may be a surface of the outer surface of the roller (200) that rotates toward the suction pipe (300) when the roller (200) rotates.

[0046] In one embodiment, the roller (200) may have a first outer surface (220) and a second outer surface (230).

[0047] The above first outer surface (220) may be a surface of the outer surface of the roller (200) that rotates toward the suction pipe (300) when the roller (200) rotates.

[0048] The above second outer surface (230) may be a surface of the outer surface of the roller (200) that rotates in the opposite direction of the suction pipe (300) when the roller (200) rotates.

[0049] The above suction pipe (300) can be opened toward the roller (200).

[0050] In a cross-section perpendicular to the above rotation axis (210), the inner circumferential surface of the suction pipe (300) may have a first end (E1) and a second end (E2).

[0051] The above first end (E1) may be adjacent to the roller (200).

[0052] The above first end (E1) may be located on the first outer circumferential surface (220).

[0053] The above second end (E2) may be adjacent to the roller (200).

[0054] The above second end (E2) may be located on the second outer circumferential surface (230).

[0055] The second distance (D2) between the first end (E1) and the center of rotation of the roller (200) in a direction perpendicular to the extension direction of the suction pipe (300) may be smaller than the radius of the roller (200).

[0056] In one embodiment, the roller (200) may have a first outer surface (220) and a second outer surface (230).

[0057] The first outer surface (220) may be a surface of the outer surface of the roller (200) that rotates toward the suction pipe (300) when the roller (200) rotates.

[0058] The second outer surface (230) may be a surface of the outer surface of the roller (200) that rotates in the opposite direction of the suction pipe (300) when the roller (200) rotates.

[0059] The above suction pipe (300) can be opened toward the roller (200).

[0060] In a cross-section perpendicular to the above rotation axis (210), the inner circumferential surface of the suction pipe (300) may have a first end (E1) and a second end (E2).

[0061] The above first end (E1) may be adjacent to the roller (200).

[0062] The above first end (E1) may be located on the first outer circumferential surface (220).

[0063] The above second end (E2) may be adjacent to the roller (200).

[0064] The above second end (E2) may be located on the second outer circumferential surface (230).

[0065] The third distance (D3) between the second end (E2) and the center of rotation of the roller (200) in a direction perpendicular to the extension direction of the suction pipe (300) may be smaller than the radius of the roller (200).

[0066] In one embodiment, the roller (200) may have a first outer surface (220) and a second outer surface (230).

[0067] The first outer surface (220) may be a surface of the outer surface of the roller (200) that rotates toward the suction pipe (300) when the roller (200) rotates.

[0068] The second outer surface (230) may be a surface of the outer surface of the roller (200) that rotates in the opposite direction of the suction pipe (300) when the roller (200) rotates.

[0069] The above suction pipe (300) can be opened toward the roller (200).

[0070] In a cross-section perpendicular to the above rotation axis (210), the central portion of the suction pipe (300) may face the first outer surface (220).

[0071] In one embodiment, the suction tube (300) may be located at the bottom of the roller (200).

[0072] The above airflow control unit (400) may be located above the suction pipe (300).

[0073] In one embodiment, the first distance (D1) between the roller (200) and the first surface (410) may be 10 mm or more and 30 mm or less.

[0074] In one embodiment, the radius of curvature (R) of the curved portion (C) of the second portion (414) may be 30 mm or more and 90 mm or less.

[0075] In one embodiment, in a cross-section perpendicular to the rotation axis (210), the angle difference (A) between the extension direction of the flat portion (L) of the first portion (412) and the extension direction of the suction pipe (300) may be 0 degrees or more and 45 degrees or less.

[0076] According to embodiments of the present invention, an electrode manufacturing device (10) may include a pattern forming unit (100) that forms a pattern and a separable scrap (52) on an electrode sheet (50); a roller (200) that rotates around a rotational axis (210) and transports the electrode sheet (50) on which the pattern and the scrap (52) are formed; a suction pipe (300) that is disposed adjacent to the roller (200), is connected to a suction device, is opened toward the roller (200), and sucks the scrap (52) separated from the electrode sheet (50); and an airflow control unit (400) that includes a first surface (410) that faces and is adjacent to the roller (200) with the scrap (52) interposed therebetween. The first surface (410) may include a first portion (412) whose distance from the roller (200) gradually decreases as it moves away from the suction pipe (300). When negative pressure is applied to the suction pipe (300), air can pass between the roller (200) and the first surface (410) and flow into the suction pipe (300).

[0077] Accordingly, the first air current (W1) flowing along the outer surface of the roller (200) is weakened, so that the scrap (52) can be stably separated from the electrode sheet (50) and / or the roller (200) and removed through the suction tube (300). Accordingly, the defect rate in electrode manufacturing can be reduced.

[0078] In addition, the scrap (52) removal performance can be easily improved at low cost with a simple configuration. In addition, the existing electrode manufacturing device (10) can be used as is or without major modification.

[0079] According to embodiments of the present invention, the first portion (412) can disperse the first air current (W1) flowing along the outer surface of the roller (200).

[0080] Accordingly, the first air current (W1) flowing along the outer surface of the roller (200) is weakened, so that the scrap (52) can be stably separated from the electrode sheet (50) and / or the roller (200) and removed through the suction tube (300). Accordingly, the defect rate in electrode manufacturing can be reduced.

[0081] According to embodiments of the present invention, the first surface (410) may include a second portion (414) that is connected to the end of the first portion (412) that is furthest from the suction pipe (300) and whose distance from the roller (200) gradually increases as it gets farther from the suction pipe (300).

[0082] Accordingly, a depressurized space (S) in which the flow rate increases and the air pressure decreases can be formed between the roller (200) and the first surface (410) (Fig. 3). The first air flow (W1) can be effectively dispersed by the depressurized space (S). Accordingly, since the first air flow (W1) is weakened, the scrap (52) can be easily separated from the electrode sheet (50) and / or the roller (200).

[0083] In addition, a gap may be created between the roller (200) and the first surface (410) by the second portion (414). Accordingly, even if the airflow control unit (400) is arranged, the leading edge of the scrap (52) can easily enter between the roller (200) and the first surface (410). Accordingly, the scrap (52) can be sucked into the suction pipe (300) and stably removed.

[0084] According to embodiments of the present invention, in a cross-section perpendicular to the rotation axis (210), the first portion (412) and the second portion (414) may form a line that protrudes convexly toward the roller (200).

[0085] Accordingly, the first air current (W1) can be effectively dispersed and the scrap (52) can be easily separated from the electrode sheet (50) and / or the roller (200). In addition, the leading end of the scrap (52) can easily enter between the roller (200) and the first surface (410).

[0086] According to embodiments of the present invention, the first surface (410) may include a curved portion (C) that forms a curve in a cross-section perpendicular to the rotation axis (210).

[0087] Accordingly, a second air current (W2) flowing along the first surface (410) can be effectively and stably formed by the Coanda effect in the curved portion (C). Accordingly, at least a portion of the first air current (W1) can easily flow toward the first surface (410) where the second air current (W2) is formed and the air pressure is lowered, so that the first air current (W1) can be effectively dispersed.

[0088] According to embodiments of the present invention, the first surface (410) may include a flat portion (L) that forms a straight line in a cross-section perpendicular to the rotation axis (210).

[0089] Accordingly, the second air current (W2) flows along the first surface (410), but the second air current (W2) is formed strongly, preventing the surrounding air pressure of the first surface (410) from being significantly lowered. This is because the Coanda effect does not occur in the flat surface (L). Accordingly, it is possible to prevent the scrap (52) from sticking to the first surface (410) and causing malfunction of the device or defective electrode manufacturing.

[0090] According to embodiments of the present invention, the second portion (414) may include a curved portion (C) that forms a curve in a cross-section perpendicular to the rotation axis (210).

[0091] Accordingly, a second air current (W2) flowing along the first surface (410) can be effectively and stably formed by the Coanda effect in the curved portion (C) of the second section (414). Accordingly, the first air current (W1) can be effectively dispersed.

[0092] In addition, even if the ambient pressure of the second portion (414) is significantly lowered due to the Coanda effect, the average distance between the second portion (414) and the scrap (52) may be increased by the curved portion (C), so that the scrap (52) may not stick to the second portion (414). Accordingly, malfunction of the device or failure of electrode manufacturing can be prevented.

[0093] According to embodiments of the present invention, the first portion (412) may include a flat portion (L) that forms a straight line in a cross-section perpendicular to the rotation axis (210).

[0094] Accordingly, a strong second air current (W2) flowing along the first surface (410) in the first portion (412) can be formed, preventing the surrounding air pressure of the first portion (412) from being significantly reduced. This is because the Coanda effect does not occur in the flat portion (L). Accordingly, even if the first portion (412) is positioned close to the scrap (52), the scrap (52) may not adhere to the first portion (412). Accordingly, malfunction of the device or failure of electrode manufacturing can be prevented.

[0095] According to embodiments of the present invention, the airflow control unit (400) may be coupled to the suction pipe (300). The first surface (410) may be connected to the inner surface of the suction pipe (300).

[0096] Accordingly, a second air current (W2) flowing along the first surface (410) can be formed effectively and stably. Accordingly, the first air current (W1) can be effectively dispersed.

[0097] According to embodiments of the present invention, the pattern forming unit (100) can form the pattern and scrap (52) at one end of the width direction of the electrode sheet (50). In the width direction of the electrode sheet (50), one end of the first surface (410) may correspond to one end of the scrap (52) or be located on one side of one end of the scrap (52), and the other end of the first surface (410) may correspond to or be located adjacent to the other end of the scrap (52).

[0098] Accordingly, the first air flow (W1) can be effectively dispersed and the scrap (52) can be easily separated and removed from the electrode sheet (50) and / or roller (200).

[0099] According to embodiments of the present invention, the width of the first surface (410) may correspond to the width of the scrap (52).

[0100] Accordingly, the first air flow (W1) facing the scrap (52) can be effectively dispersed, and the scrap (52) can be easily separated and removed from the electrode sheet (50) and / or roller (200).

[0101] According to embodiments of the present invention, the pattern forming unit (100) can form the pattern and scrap (52) on one side in the width direction of the electrode sheet (50). The suction pipe (300) can be positioned at a position corresponding to one side in the width direction of the electrode sheet (50).

[0102] Accordingly, the scrap (52) can be effectively sucked and removed.

[0103] According to embodiments of the present invention, the first surface (410) may face the first outer surface (220) of the roller (200) that rotates toward the suction pipe (300) when the roller (200) rotates.

[0104] Accordingly, the first air current (W1) that hinders the separation of the scrap (52) can be dispersed from the time the scrap (52) approaches the suction pipe (300). Accordingly, the scrap (52) can be easily separated and removed from the electrode sheet (50) and / or roller (200).

[0105] According to embodiments of the present invention, the roller (200) may have a first outer peripheral surface (220) that rotates toward the suction pipe (300) when the roller (200) rotates, and a second outer peripheral surface (230) that rotates in the opposite direction of the suction pipe (300). The suction pipe (300) may be opened toward the roller (200). In a cross-section perpendicular to the rotation axis (210), the inner surface of the suction pipe (300) has a first end (E1) adjacent to the roller (200) and positioned toward the first outer surface (220) and a second end (E2) adjacent to the roller (200) and positioned toward the second outer surface (230), and a second distance (D2) between the first end (E1) and the rotation center of the roller (200) in a direction perpendicular to the extension direction of the suction pipe (300) may be smaller than the radius of the roller (200).

[0106] Accordingly, a second air current (W2) flowing along the first surface (410) can be formed effectively and stably. Accordingly, the first air current (W1) can be effectively dispersed.

[0107] According to embodiments of the present invention, the roller (200) may have a first outer circumferential surface (220) that rotates toward the suction pipe (300) when the roller (200) rotates, and a second outer circumferential surface (230) that rotates in the opposite direction of the suction pipe (300). The suction pipe (300) may be opened toward the roller (200). In a cross-section perpendicular to the rotation axis (210), the inner surface of the suction pipe (300) has a first end (E1) adjacent to the roller (200) and positioned toward the first outer surface (220) and a second end (E2) adjacent to the roller (200) and positioned toward the second outer surface (230), and a third distance (D3) between the second end (E2) and the rotation center of the roller (200) in a direction perpendicular to the extension direction of the suction pipe (300) may be smaller than the radius of the roller (200).

[0108] Accordingly, a second sub-air current (W12) flowing along the second outer peripheral surface (230) of the roller (200) can be formed effectively and stably by the Coanda effect. Accordingly, scrap (52), foreign substances, dust, etc. can be effectively removed. This may be because the second sub-air current (W12) flows in the opposite direction to the rotational direction of the second outer peripheral surface (230).

[0109] According to embodiments of the present invention, the roller (200) may have a first outer peripheral surface (220) that rotates toward the suction pipe (300) when the roller (200) rotates, and a second outer peripheral surface (230) that rotates in the opposite direction of the suction pipe (300). The suction pipe (300) may be opened toward the roller (200). In a cross-section perpendicular to the rotation axis (210), the central portion of the suction pipe (300) may face the first outer peripheral surface (220).

[0110] Accordingly, the turbulence formed by the collision of the first sub-air current (W11) and the second sub-air current (W12) is formed on the first outer peripheral surface (220) rotating toward the suction pipe (300), so that foreign substances, dust, etc. can be reduced from escaping through the space between the suction pipe (300) and the roller (200) due to the turbulence.

[0111] According to embodiments of the present invention, the suction pipe (300) may be located below the roller (200). The airflow control unit (400) may be located above the suction pipe (300).

[0112] Accordingly, the scrap (52) can be stably separated and removed from the electrode sheet (50) and / or roller (200) not only by the suction force of the suction tube (300) but also by gravity.

[0113] According to embodiments of the present invention, the first distance (D1) between the roller (200) and the first surface (410) may be 10 mm or more and 30 mm or less.

[0114] Accordingly, since the first distance (D1) is 10 mm or more, even if the scrap (52) extending in the longitudinal direction is cut, the leading end of the cut scrap (52) can easily enter between the roller (200) and the first surface (410). In addition, since the first distance (D1) is 30 mm or less, the first air current (W1) can be effectively dispersed.

[0115] According to embodiments of the present invention, the radius of curvature (R) of the curved portion (C) of the second portion (414) may be 30 mm or more and 90 mm or less.

[0116] Accordingly, since the radius of curvature of the curved portion (C) is 90 mm or less, a sufficient gap can be created between the roller (200) and the second portion (414). Accordingly, even if the scrap (52) extending in the longitudinal direction is cut, the leading end of the cut scrap (52) can easily enter between the roller (200) and the second portion (414). In addition, since the decompression rate in the aforementioned decompression space (S) increases, the first air current (W1) can be effectively dispersed.

[0117] In addition, since the radius of curvature of the curved portion (C) is 30 mm or more, the gap between the roller (200) and the second portion (414) may not be excessively widened. Accordingly, it is possible to prevent the decompression rate in the aforementioned decompression space (S) from excessively increasing, causing the scrap (52) to stick to the first surface (410), resulting in malfunction of the device, defective electrode manufacturing, or damage to the airflow control portion (400).

[0118] According to embodiments of the present invention, in a cross-section perpendicular to the rotation axis (210), the angle difference (A) between the extension direction of the flat portion (L) of the first portion (412) and the extension direction of the suction pipe (300) may be 0 degrees or more and 45 degrees or less.

[0119] Accordingly, a second air current (W2) flowing along the first surface (410) can be stably formed.

[0120] In addition to the effects described above, specific effects of the present invention are described below while explaining specific details for carrying out the invention.

[0121] FIG. 1 and FIG. 2 are side and front views schematically illustrating an electrode manufacturing device according to one embodiment of the present invention.

[0122] Figure 3 is an enlarged view of part 3 of Figure 1.

[0123] Fig. 4 is a schematic drawing showing a case where an air flow control unit is not provided in the electrode manufacturing device of Fig. 3.

[0124] [Explanation of symbols]

[0125] 10: Electrode manufacturing device

[0126] 50: Electrode sheet 52: Scrap

[0127] 100: Pattern forming part P: Notching point

[0128] 200: Roller 210: Rotating shaft

[0129] 220: First outer circumference 230: Second outer circumference

[0130] 300: Suction pipe

[0131] 400: Airflow control unit 410: First side

[0132] 412: Part 1 414: Part 2

[0133] C: Curved section L: Flat section

[0134] D1: 1st Street

[0135] D2: 2nd street D3: 3rd street

[0136] E1: First end E2: Second end

[0137] W1: First airflow W2: Second airflow

[0138] W11: 1st sub-stream W12: 2nd sub-stream

[0139] S: Depressurized space

[0140] R: Radius of curvature A: Angle difference

[0141] The above-described objects, features, and advantages will be described in detail below with reference to the accompanying drawings, so that those skilled in the art can easily practice the technical idea of ​​the present invention. In describing the present invention, if it is determined that a detailed description of known technologies related to the present invention may unnecessarily obscure the gist of the present invention, a detailed description thereof will be omitted. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to indicate the same or similar components.

[0142] Although terms like "first" and "second" are used to describe various components, these components are not limited by these terms. These terms are used merely to distinguish one component from another, and unless otherwise specified, a "first" component may also be a "second" component.

[0143] Throughout the specification, unless otherwise specifically stated, each element may be singular or plural.

[0144] Hereinafter, the phrase "any configuration is placed on (or below)" a component or "on (or below)" a component may mean that any configuration is placed in contact with the upper surface (or lower surface) of said component, and that other configurations may be interposed between said component and any configuration placed on (or below) said component.

[0145] Additionally, when it is described that a component is "connected," "coupled," or "connected" to another component, it should be understood that the components may be directly connected or connected to one another, but that other components may also be "interposed" between the components, or that each component may be "connected," "coupled," or "connected" through another component.

[0146] As used herein, singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as "consisting of" or "comprising" should not necessarily be construed to include all of the components or steps described in the specification, and should be construed to mean that some of the components or steps may not be included, or that additional components or steps may be included.

[0147] FIG. 1 and FIG. 2 are side and front views schematically illustrating an electrode manufacturing device according to one embodiment of the present invention. FIG. 3 is an enlarged view of part 3 of FIG. 1. FIG. 4 is a schematic drawing schematically illustrating a case in which an airflow control unit is not provided in the electrode manufacturing device of FIG. 3.

[0148] [Electrode manufacturing device]

[0149] Referring to FIGS. 1 to 3, an electrode manufacturing device (10) according to one embodiment may include a pattern forming unit (100), a roller (200), a suction tube (300), and an airflow control unit (400).

[0150] The pattern forming unit (100) can form a pattern and a separable scrap (52) on the electrode sheet (50). The pattern forming unit (100) can form the pattern and the scrap (52) on one side (or one end) of the electrode sheet (50) in the width direction. For example, the pattern forming unit (100) can form a pattern (e.g., a tab) on the electrode sheet (50) by notching a notching point (P) of the electrode sheet (50) with a laser (FIGS. 1 and 2). The pattern and the scrap (52) can extend in the longitudinal direction of the electrode sheet (50) (FIG. 2).

[0151] Here, the scrap (52) may be a portion of the electrode sheet (50). The scrap (52) may be a portion discarded after forming a pattern on the electrode sheet (50). The scrap (52) may be elongated in the longitudinal direction (Fig. 2). Alternatively, the scrap (52) may be a plurality of independent pieces separated from each other. The scrap (52) may be formed on one side of the electrode sheet (50) in the width direction (Fig. 2). The scrap (52) may be removed by being sucked into the suction tube (300).

[0152] The roller (200) can rotate around the rotation axis (210). The roller (200) can transport an electrode sheet (50) on which a pattern and scrap (52) are formed.

[0153] The axial direction (longitudinal direction of the rotation axis (210)) of the roller (200) may correspond to the width direction of the electrode sheet (50) (Fig. 2). When the scrap (52) is formed on one side of the width direction of the electrode sheet (50), one side of the axial direction of the roller (200) may come into contact with the scrap (52) (Fig. 2).

[0154] The roller (200) may have a first outer surface (220) that rotates toward the suction pipe (300) described later when the roller (200) rotates, and a second outer surface (230) that rotates in the opposite direction of the suction pipe (300) (Fig. 3, Fig. 4)).

[0155] A suction tube (300) may be positioned adjacent to the roller (200). The suction tube (300) may be connected to a suction device (not shown). Negative pressure may be applied to the suction tube (300) by the suction device. The suction tube (300) may suction scrap (52) separated from the electrode sheet (50).

[0156] The suction pipe (300) can be opened toward the roller (200). For example, the suction pipe (300) can be opened toward the roller (200). When the scrap (52) is formed on one side in the width direction of the electrode sheet (50), the suction pipe (300) can be opened toward one side in the width direction of the electrode sheet (50) (FIGS. 1 to 3).

[0157] In a case where the pattern forming unit (100) forms a pattern and scrap (52) on one side of the width direction of the electrode sheet (50), the suction tube (300) can be positioned at a position corresponding to one side of the width direction of the electrode sheet (50). Accordingly, the scrap (52) can be effectively sucked and removed.

[0158] When negative pressure is applied to the suction pipe (300), a first air current (W1) flowing along the outer surface of the roller (200) may be formed due to the Coanda effect (Figs. 3 and 4). Here, the Coanda effect may refer to a phenomenon in which a fluid flows along a curved surface. The first air current (W1) may include a first sub-air current (W11) and a second sub-air current (W12) (Figs. 3 and 4).

[0159] The first sub-air current (W11) can flow along the first outer peripheral surface (220) of the roller (200). The flow direction of the first sub-air current (W11) and the rotational direction of the first outer peripheral surface (220) can correspond to each other. Accordingly, the first sub-air current (W11) can prevent the scrap (52) from being separated from the electrode sheet (50) and the roller (200) (Fig. 4). Since the scrap (52) is not removed by the first sub-air current (W11), a defect in the electrode manufacturing may occur (Fig. 4).

[0160] The second sub-air current (W12) can flow along the second outer peripheral surface (230) of the roller (200). The flow direction of the second sub-air current (W12) and the rotation direction of the second outer peripheral surface (230) can be opposite to each other. Accordingly, the second sub-air current (W12) can separate scrap (52), foreign matter, dust, etc. from the electrode sheet (50) and the roller (200). In contrast, even if the flow direction of the second sub-air current (W12) and the rotation direction of the second outer peripheral surface (230) are opposite to each other, since the second sub-air current (W12) flows along the second outer peripheral surface (230), the second sub-air current (W12) may prevent scrap (52), foreign matter, dust, etc. from being separated from the electrode sheet (50) and the roller (200).

[0161] In a cross-section perpendicular to the rotation axis (210), the inner surface of the suction pipe (300) may have a first end (E1) and a second end (E2). The first end (E1) may be adjacent to the roller (200) and positioned toward the first outer surface (220). The second end (E2) may be adjacent to the roller (200) and positioned toward the second outer surface (230).

[0162] In a cross-section perpendicular to the rotation axis (210), a second distance (D2) between the first end (E1) and the rotation center of the roller (200) in a direction perpendicular to the extension direction (e.g., vertical direction) of the suction pipe (300) (e.g., horizontal direction) may be smaller than the radius of the roller (200) (Fig. 3).

[0163] Accordingly, the second air current (W2) flowing along the first surface (410) described below can be formed effectively and stably. Accordingly, the first air current (W1) can be effectively dispersed.

[0164] In a cross-section perpendicular to the rotation axis (210), a third distance (D3) between the second end (E2) and the center of rotation of the roller (200) in a direction perpendicular to the extension direction of the suction pipe (300) may be smaller than the radius of the roller (200) (Fig. 3).

[0165] Accordingly, a second sub-air current (W12) flowing along the second outer peripheral surface (230) of the roller (200) can be formed effectively and stably by the Coanda effect. Accordingly, scrap (52), foreign substances, dust, etc. can be effectively removed. This may be because the second sub-air current (W12) flows in the opposite direction to the rotational direction of the second outer peripheral surface (230).

[0166] In a cross-section perpendicular to the rotation axis (210), the central portion of the suction pipe (300) can face the first outer surface (220) (Fig. 3).

[0167] Accordingly, since the turbulence formed by the collision of the first sub-current (W11) and the second sub-current (W12) is formed on the first outer peripheral surface (220) rotating toward the suction pipe (300), it is possible to reduce foreign substances, dust, etc. from escaping through the space between the suction pipe (300) and the roller (200) due to the turbulence. On the other hand, if the turbulence is formed on the second outer peripheral surface (230), the amount of foreign substances flying may increase.

[0168] The suction pipe (300) can be located at the bottom of the roller (200) (Fig. 3).

[0169] Accordingly, the scrap (52) can be stably separated and removed from the electrode sheet (50) and / or roller (200) not only by the suction force of the suction tube (300) but also by gravity.

[0170] The airflow control unit (400) can be coupled to the suction pipe (300). The airflow control unit (400) can be formed integrally with the suction pipe (300). However, the present invention is not limited to this configuration.

[0171] In case the suction pipe (300) is located at the bottom of the roller (200), the airflow control unit (400) may be located above the suction pipe (300) (Fig. 3).

[0172] The airflow control unit (400) may include a first surface (410). The first surface (410) may be adjacent to and facing the roller (200) with the scrap (52) interposed therebetween. When negative pressure is applied to the suction pipe (300), air may pass between the roller (200) and the first surface (410) and be introduced into the suction pipe (300).

[0173] The first surface (410) may include a first portion (412). The first surface (410) may include a second portion (414). The first surface (410) may include a curved portion (C). The first surface (410) may include a flat portion (L).

[0174] The first part (412) may be a part where the distance from the roller (200) gradually decreases as it moves away from the suction pipe (300).

[0175] In this way, the electrode manufacturing device (10) may include a pattern forming unit (100), a roller (200), a suction tube (300), and an airflow control unit (400), and the first surface (410) of the airflow control unit (400) may include a first portion (412). Accordingly, the first airflow (W1) flowing along the outer circumferential surface of the roller (200) is weakened, so that the scrap (52) can be stably separated from the electrode sheet (50) and / or the roller (200) and removed through the suction tube (300). Accordingly, the defect rate in electrode manufacturing can be reduced.

[0176] In addition, the scrap (52) removal performance can be easily improved at low cost with a simple configuration. In addition, the existing electrode manufacturing device (10) can be used as is or without major modification.

[0177] Specifically, the first portion (412) can disperse the first air current (W1) flowing along the outer surface of the roller (200) formed by the Coanda effect. For example, a portion of the first air current (W1) may escape the outer surface of the roller (200) and flow along the first portion (412) of the first surface (410) before being introduced into the suction pipe (300).

[0178] The second portion (414) may be connected to the end of the first portion (412) that is furthest from the suction pipe (300). The second portion (414) may be a portion whose distance from the roller (200) gradually increases as it gets farther from the suction pipe (300).

[0179] Accordingly, a depressurized space (S) in which the flow rate increases and the air pressure decreases can be formed between the roller (200) and the first surface (410) (FIG. 3). Specifically, the depressurized space (S) may be a space between the roller (200) and the first surface (410), a first space where the roller (200) and the first portion (412) face each other, a second space where the roller (200) and the second portion (414) face each other, and a surrounding space. The first air flow (W1) can be effectively dispersed by the depressurized space (S). For example, some of the first air flow (W1) can easily escape the outer surface of the roller (200) in the depressurized space (S) and flow toward the first surface (410). Accordingly, since the first air flow (W1) is weakened, the scrap (52) can be easily separated from the electrode sheet (50) and / or the roller (200).

[0180] In addition, a gap may be created between the roller (200) and the first surface (410) by the second portion (414). Accordingly, even if the airflow control unit (400) is arranged, the leading edge of the scrap (52) can easily enter between the roller (200) and the first surface (410). Accordingly, the scrap (52) can be sucked into the suction pipe (300) and stably removed.

[0181] In a cross-section perpendicular to the rotation axis (210), the first portion (412) and the second portion (414) can form a line that protrudes convexly toward the roller (200) (Fig. 3).

[0182] Accordingly, the first air current (W1) can be effectively dispersed and the scrap (52) can be easily separated from the electrode sheet (50) and / or the roller (200). In addition, the leading end of the scrap (52) can easily enter between the roller (200) and the first surface (410).

[0183] The curved portion (C) can form a curve in a cross-section perpendicular to the rotation axis (210) (Fig. 3).

[0184] Accordingly, a second air current (W2) flowing along the first surface (410) can be effectively and stably formed by the Coanda effect in the curved portion (C). Accordingly, at least a portion of the first air current (W1) can easily flow toward the first surface (410) where the second air current (W2) is formed and the air pressure is lowered, so that the first air current (W1) can be effectively dispersed.

[0185] The second portion (414) described above may include a curved portion (C) (Fig. 3).

[0186] Accordingly, a second air current (W2) flowing along the first surface (410) can be effectively and stably formed by the Coanda effect in the curved portion (C) of the second section (414). Accordingly, the first air current (W1) can be effectively dispersed.

[0187] In addition, even if the ambient pressure of the second portion (414) is significantly lowered due to the Coanda effect, the average distance between the second portion (414) and the scrap (52) may be increased by the curved portion (C), so that the scrap (52) may not stick to the second portion (414). Accordingly, malfunction of the device or failure of electrode manufacturing can be prevented.

[0188] The flat portion (L) can form a straight line in a cross-section perpendicular to the rotation axis (210) (Fig. 3).

[0189] Accordingly, the second air current (W2) flows along the first surface (410), but the second air current (W2) is formed strongly, preventing the surrounding air pressure of the first surface (410) from being significantly lowered. This is because the Coanda effect does not occur in the flat surface (L). Accordingly, it is possible to prevent the scrap (52) from sticking to the first surface (410) and causing malfunction of the device or defective electrode manufacturing.

[0190] The first portion (412) described above may include a flat portion (L) (Fig. 3).

[0191] Accordingly, a strong second air current (W2) flowing along the first surface (410) in the first portion (412) can be formed, preventing the surrounding air pressure of the first portion (412) from being significantly reduced. This is because the Coanda effect does not occur in the flat portion (L). Accordingly, even if the first portion (412) is positioned close to the scrap (52), the scrap (52) may not adhere to the first portion (412). Accordingly, malfunction of the device or failure of electrode manufacturing can be prevented.

[0192] The first surface (410) may face the first outer surface (220) described above, which rotates toward the suction pipe (300) when the roller (200) rotates among the outer surfaces of the roller (200). When the suction pipe (300) is arranged at the bottom of the roller (200), the first surface (410) may face the first outer surface (220) of the roller (200) that rotates downward (Fig. 3).

[0193] Accordingly, the first air current (W1) that hinders the separation of the scrap (52) can be dispersed from the time the scrap (52) approaches the suction pipe (300). Accordingly, the scrap (52) can be easily separated and removed from the electrode sheet (50) and / or roller (200).

[0194] When the airflow control unit (400) is coupled to the suction pipe (300), the first surface (410) can be connected to the inner surface of the suction pipe (300).

[0195] Accordingly, a second air current (W2) flowing along the first surface (410) can be formed effectively and stably. Accordingly, the first air current (W1) can be effectively dispersed.

[0196] In the case where the pattern forming unit (100) forms a pattern and a scrap (52) at one end of the width direction of the electrode sheet (50), one end of the first surface (410) may correspond to one end of the scrap (52) in the width direction of the electrode sheet (50) or may be located on one side of one end of the scrap (52). In addition, the other end of the first surface (410) may correspond to or be adjacent to the other end of the scrap (52) in the width direction of the electrode sheet (50) (Fig. 2).

[0197] Accordingly, the first air flow (W1) can be effectively dispersed and the scrap (52) can be easily separated and removed from the electrode sheet (50) and / or roller (200).

[0198] The width of the first side (410) can correspond to the width of the scrap (52) (Fig. 2).

[0199] Accordingly, the first air flow (W1) facing the scrap (52) can be effectively dispersed, and the scrap (52) can be easily separated and removed from the electrode sheet (50) and / or roller (200).

[0200] The first distance (D1) between the roller (200) and the first surface (410) may be 10 mm or more and 30 mm or less (Fig. 3).

[0201] Accordingly, since the first distance (D1) is 10 mm or more, even if the scrap (52) extending in the longitudinal direction is cut, the leading end of the cut scrap (52) can easily enter between the roller (200) and the first surface (410). In addition, since the first distance (D1) is 30 mm or less, the first air current (W1) can be effectively dispersed.

[0202] The radius of curvature (R) of the curved portion (C) of the second portion (414) may be 30 mm or more and 90 mm or less (Fig. 3).

[0203] Accordingly, since the radius of curvature of the curved portion (C) is 90 mm or less, a sufficient gap can be created between the roller (200) and the second portion (414). Accordingly, even if the scrap (52) extending in the longitudinal direction is cut, the leading end of the cut scrap (52) can easily enter between the roller (200) and the second portion (414). In addition, since the decompression rate in the aforementioned decompression space (S) increases, the first air current (W1) can be effectively dispersed.

[0204] In addition, since the radius of curvature of the curved portion (C) is 30 mm or more, the gap between the roller (200) and the second portion (414) may not be excessively widened. Accordingly, it is possible to prevent the decompression rate in the aforementioned decompression space (S) from excessively increasing, causing the scrap (52) to stick to the first surface (410), resulting in malfunction of the device, defective electrode manufacturing, or damage to the airflow control portion (400).

[0205] In a cross-section perpendicular to the rotation axis (210), the angle difference (A) between the extension direction of the flat portion (L) of the first portion (412) and the extension direction of the suction pipe (300) may be 0 degrees or more and 45 degrees or less (Fig. 3).

[0206] Accordingly, a second air current (W2) flowing along the first surface (410) can be stably formed.

[0207] It should be understood that the above-described embodiments are illustrative in all respects and not restrictive, and the scope of the present invention will be determined by the claims that follow, rather than by the detailed description set forth above. Furthermore, the meaning and scope of the claims that follow, as well as all possible modifications and variations derived from their equivalent concepts, should be construed as encompassing the scope of the present invention.

[0208] Although the present invention has been described with reference to the drawings exemplified above, it is to be understood that the present invention is not limited to the embodiments and drawings disclosed herein, and that various modifications may be made by those skilled in the art within the scope of the technical idea of ​​the present invention. Furthermore, even if the operational effects according to the configuration of the present invention have not been explicitly described while describing the embodiments of the present invention, it is natural that the effects predictable by the corresponding configuration should also be acknowledged.

Claims

1. A pattern forming unit (100) that forms a pattern and a separable scrap (52) on an electrode sheet (50); A roller (200) that rotates around a rotation axis (210) and transports the electrode sheet (50) on which the pattern and scrap (52) are formed; A suction tube (300) disposed adjacent to the roller (200), connected to a suction device, open toward the roller (200), and sucking the scrap (52) separated from the electrode sheet (50); and It includes an airflow control unit (400) configured to include a first surface (410) that faces and is adjacent to the roller (200) with the scrap (52) interposed therebetween, The first surface (410) includes a first portion (412) whose distance from the roller (200) gradually decreases as it moves away from the suction pipe (300). When negative pressure is applied to the above suction pipe (300), air passes between the roller (200) and the first surface (410) and flows into the above suction pipe (300). Electrode manufacturing device.

2. In claim 1, The above first part (412) is an electrode manufacturing device that disperses the first air current (W1) flowing along the outer surface of the roller (200).

3. In claim 1 or claim 2, The electrode manufacturing device, wherein the first surface (410) is connected to the end of the first portion (412) that is furthest from the suction pipe (300) and includes a second portion (414) whose distance from the roller (200) gradually increases as it gets farther from the suction pipe (300).

4. In claim 3, An electrode manufacturing device, wherein in a cross-section perpendicular to the above rotation axis (210), the first portion (412) and the second portion (414) together form a line that protrudes convexly toward the roller (200).

5. In any one of claims 1 to 4, The above first surface (410) is an electrode manufacturing device including a curved surface (C) that forms a curve in a cross-section perpendicular to the rotation axis (210).

6. In any one of claims 1 to 5, The above first surface (410) is an electrode manufacturing device including a flat portion (L) that forms a straight line in a cross-section perpendicular to the rotation axis (210).

7. In claim 3 or claim 4, An electrode manufacturing device, wherein the second portion (414) includes a curved portion (C) that forms a curve in a cross-section perpendicular to the rotation axis (210).

8. In any one of claims 1 to 7, An electrode manufacturing device, wherein the first portion (412) includes a flat portion (L) that forms a straight line in a cross-section perpendicular to the rotation axis (210).

9. In any one of claims 1 to 8, The above airflow control unit (400) is coupled to the suction pipe (300), The above first surface (410) is an electrode manufacturing device connected to the inner surface of the suction tube (300).

10. In any one of claims 1 to 9, The above pattern forming part (100) forms the pattern and scrap (52) on one end of the width direction of the electrode sheet (50), An electrode manufacturing device, wherein, in the width direction of the electrode sheet (50), one end of the first surface (410) corresponds to one end of the scrap (52) or is located on one side of the scrap (52), and the other end of the first surface (410) corresponds to or is adjacent to the other end of the scrap (52).

11. In any one of claims 1 to 10, An electrode manufacturing device in which the width of the first surface (410) corresponds to the width of the scrap (52).

12. In any one of claims 1 to 11, The above pattern forming unit (100) forms the pattern and scrap (52) on one side of the width direction of the electrode sheet (50), An electrode manufacturing device in which the suction tube (300) is positioned at a position corresponding to one side of the electrode sheet (50) in the width direction of the electrode sheet (50).

13. In any one of claims 1 to 12, The above first surface (410) is an electrode manufacturing device that faces the first outer surface (220) of the outer surface of the roller (200) that rotates toward the suction pipe (300) when the roller (200) rotates.

14. In claim 13, The above roller (200) has a first outer surface (220) that rotates toward the suction pipe (300) when the roller (200) rotates, and a second outer surface (230) that rotates in the opposite direction of the suction pipe (300). The above suction pipe (300) is opened toward the roller (200), An electrode manufacturing device, wherein, in a cross-section perpendicular to the rotation axis (210), the inner surface of the suction pipe (300) has a first end (E1) adjacent to the roller (200) and positioned toward the first outer surface (220) and a second end (E2) adjacent to the roller (200) and positioned toward the second outer surface (230), and a second distance (D2) between the first end (E1) and the rotation center of the roller (200) in a direction perpendicular to the extension direction of the suction pipe (300) is smaller than the radius of the roller (200).

15. In any one of claims 1 to 12, The above roller (200) has a first outer surface (220) that rotates toward the suction pipe (300) when the roller (200) rotates, and a second outer surface (230) that rotates in the opposite direction of the suction pipe (300). The above suction pipe (300) is opened toward the roller (200), An electrode manufacturing device, wherein, in a cross-section perpendicular to the rotation axis (210), the inner surface of the suction pipe (300) has a first end (E1) adjacent to the roller (200) and positioned toward the first outer surface (220) and a second end (E2) adjacent to the roller (200) and positioned toward the second outer surface (230), and a third distance (D3) between the second end (E2) and the rotation center of the roller (200) in a direction perpendicular to the extension direction of the suction pipe (300) is smaller than the radius of the roller (200).

16. In any one of claims 1 to 12, The above roller (200) has a first outer surface (220) that rotates toward the suction pipe (300) when the roller (200) rotates, and a second outer surface (230) that rotates in the opposite direction of the suction pipe (300). The above suction pipe (300) is opened toward the roller (200), An electrode manufacturing device, wherein, in a cross-section perpendicular to the above rotation axis (210), the central portion of the suction tube (300) faces the first outer surface (220).

17. In any one of claims 1 to 16, The above suction pipe (300) is located at the bottom of the roller (200), The above airflow control unit (400) is located above the suction pipe (300), and is an electrode manufacturing device.

18. In any one of claims 1 to 17, An electrode manufacturing device, wherein the first distance (D1) between the roller (200) and the first surface (410) is 10 mm or more and 30 mm or less.

19. In claim 7, An electrode manufacturing device, wherein the radius of curvature (R) of the curved portion (C) of the second portion (414) is 30 mm or more and 90 mm or less.

20. In claim 8, An electrode manufacturing device, wherein, in a cross-section perpendicular to the rotation axis (210), the angle difference (A) between the extension direction of the flat portion (L) of the first portion (412) and the extension direction of the suction pipe (300) is 0 degrees or more and 45 degrees or less.

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