Electrode manufacturing apparatus and electrode manufacturing method

Abstract

The present invention provides an electrode manufacturing apparatus (10) comprising: a laser irradiation part (100) which includes a first sheet part (52) and a second sheet part (54) positioned, respectively, on one side and the other side in the width direction and extending in a longitudinal direction, and which irradiates, with a laser, a predetermined point (P) of the second sheet part (54) of an electrode sheet (50) transferred in the longitudinal direction; a first drum (210) in which a central axis (A) is arranged in parallel with the width direction, and which is in contact with the first sheet part (52) in the thickness direction in a first angle section (N), having the central axis (A) at the center thereof, to which the predetermined point (P) belongs; and a main support part (300) and one or more preceding support parts (400) which are disposed on the other side of the first drum (210) in the width direction, and which are at least partially disposed within the first angle section (N), are in contact with the second sheet part (54) in the thickness direction, and generate tension in the second sheet part (54). The main support part (300) faces the laser irradiation part (100) and can generate tension at the predetermined point (P). The one or more preceding support parts (400) can be disposed at the upstream side of the main support part (300) in the transport direction of the electrode sheet (50).

Description

Electrode manufacturing apparatus and electrode manufacturing method

[0001] This application claims the benefit of priority based on Korean Patent Application No. 10-2024-0164435 filed November 18, 2024, and all contents disclosed in the document of said Korean patent application are incorporated herein as part of this specification.

[0002] The present invention relates to an electrode manufacturing apparatus and an electrode manufacturing method, and more specifically, to an electrode manufacturing apparatus and an electrode manufacturing method that reduce or prevent shaking (vibration) of an electrode sheet at a laser processing point.

[0003] An electrode of a secondary battery is manufactured by forming an electrode tab by laser notching the uncoated portion of an electrode sheet, which includes a retaining portion coated with an electrode active material and an uncoated portion not coated with an electrode active material, and then cutting the electrode sheet to a predetermined length.

[0004] When notching an electrode sheet with a laser, if the unnotched area vibrates, laser processing defects occur, requiring the electrode to be discarded. Therefore, conventionally, vibration was reduced by generating tension in the unnotched area around the laser irradiation point using a pattern jig.

[0005] However, if ripples exist in the unsupported portion due to factors such as the difference in elongation rates between the retained portion and the unsupported portion of the electrode sheet, the unsupported portion vibrates even when a pattern jig is used. Furthermore, if a drum-type notching device is used in which the electrode sheet is laser notched while being bent and transported along the outer surface of the drum, the curvature of the ripples in the unsupported portion intensifies, causing the unsupported portion to vibrate even when a pattern jig is used. Accordingly, a device and method are required to reduce or prevent vibration (shake) in the unsupported portion at the laser notching point.

[0006] A related prior art document is Korean Registered Patent No. 10-2023-0165641.

[0007] The present invention was devised to solve the aforementioned problems and aims to provide an electrode manufacturing apparatus and an electrode manufacturing method that reduce or prevent shaking (vibration) of an electrode sheet at a laser processing point.

[0008] The present invention aims to provide an electrode manufacturing apparatus and an electrode manufacturing method that are installed simply and stably.

[0009] The present invention aims to provide an electrode manufacturing apparatus and an electrode manufacturing method that are implemented at low cost with a simple configuration.

[0010] The present invention aims to provide an electrode manufacturing apparatus and an electrode manufacturing method that are easy to install and maintain and have improved structural stability.

[0011] The technical problems of the present invention are not limited to the purposes mentioned above, and other unmentioned purposes and advantages of the present invention may be understood from the following description and will be more clearly understood by the embodiments of the present invention. Furthermore, it will be readily apparent that the purposes and advantages of the present invention can be realized by the means and combinations thereof set forth in the claims.

[0012] To solve the above-mentioned problem, the present invention provides an electrode manufacturing device (10) comprising a laser irradiation unit (100), a first drum (210), a main support unit (300), and one or more preceding support units (400).

[0013] The above laser irradiation unit (100) can irradiate a laser at a predetermined point (P) of the second sheet portion (54) of the electrode sheet (50).

[0014] The electrode sheet (50) may include a first sheet portion (52) and a second sheet portion (54).

[0015] The first sheet portion (52) and the second sheet portion (54) can be located on one side and the other side, respectively, in the width direction.

[0016] The first sheet portion (52) and the second sheet portion (54) can be extended in the longitudinal direction.

[0017] The electrode sheet (50) can be transported in the longitudinal direction.

[0018] The first drum (210) above may have a central axis (A) arranged parallel to the width direction.

[0019] The first drum (210) can come into contact with the first sheet portion (52) in the thickness direction at the first angle section (N) to which the predetermined point (P) belongs, centered on the central axis (A).

[0020] The main support member (300) and one or more preceding support members (400) may be arranged on the other side of the first drum (210) in the width direction.

[0021] The main support member (300) and one or more preceding support members (400) can each be positioned at least partially within the first angle section (N).

[0022] The main support member (300) and one or more preceding support members (400) can come into contact with the second sheet member (54) in the thickness direction.

[0023] The main support member (300) and one or more preceding support members (400) can generate tension in the second sheet member (54).

[0024] The above main support member (300) can face the above laser irradiation member (100).

[0025] The above main support member (300) can generate tension at the above predetermined point (P).

[0026] One or more of the above-mentioned leading support members (400) may be positioned upstream of the main support member (300) in the direction of transport of the electrode sheet (50).

[0027] In one embodiment, a drum unit (200) may be included, comprising a first drum (210) and a second drum (220) coupled to the first drum (210) and coaxial with the first drum (210).

[0028] The second drum (220) may include a first portion (222) that is positioned on the other side of the first drum (210) in the width direction and faces the second sheet portion (54) in the thickness direction in the first angle section (N).

[0029] One or more of the above-mentioned leading support members (400) may be installed in the first part (222).

[0030] In one embodiment, the main support member (300) may be installed on the first portion (222) and may be installed on one side of one or more preceding support members (400) in a circumferential direction.

[0031] In one embodiment, at least one of the leading support members (400) may be a rotatable roller.

[0032] In one embodiment, the at least one leading support member (400) may be installed to be freely rotatable.

[0033] In one embodiment, the at least one leading support member (400) can be rotated by rotational driving.

[0034] In one embodiment, at least one of the leading support members (400) may be a rotatable roller.

[0035] The first portion (222) may include one or more installation grooves (G2) formed by being recessed radially inward from the outer surface of the first portion (222).

[0036] The above at least one leading support member (400) can be inserted and installed in the above one or more installation grooves (G2).

[0037] In one embodiment, each of the preceding support members (400) may be spaced apart from the main support member (300) by a predetermined distance in the direction of transfer.

[0038] In one embodiment, in the conveying direction, the preceding support member (400) adjacent to the main support member (300) may be positioned adjacent to the main support member (300).

[0039] In one embodiment, the leading support member (400) may be arranged in a plurality of units in the transfer direction.

[0040] In one embodiment, the plurality of leading support members (400) may be spaced apart from each other at a predetermined distance in the transfer direction.

[0041] In addition, to solve the above-mentioned problem, the present invention provides an electrode manufacturing method (S900) including a laser processing process (S910).

[0042] In the above laser processing process (S910), the laser irradiation unit (100) can irradiate a laser at a predetermined point (P) of the second sheet portion (54) of the electrode sheet (50) that is transported in the longitudinal direction.

[0043] In one embodiment, during the laser processing process (S910), the first sheet portion (52) of the electrode sheet (50) may be bent and moved together with the second sheet portion (54) in contact with the outer surface of the first drum (210) in the first angle section (N).

[0044] Additionally, tension may be generated in the second sheet portion (54) by contacting the main support portion (300) and the one or more preceding support portions (400), each of which is disposed at least partially within the first angle section (N).

[0045] The above main support member (300) can face the above laser irradiation member (100).

[0046] The above main support member (300) can generate tension at the above predetermined point (P).

[0047] One or more of the above-mentioned leading support members (400) may be positioned upstream of the main support member (300) in the direction of transfer.

[0048] In one embodiment, the leading support member (400) may be arranged in a plurality of units in the transfer direction.

[0049] In the above laser processing process (S910), the second sheet portion (54) may come into contact with the plurality of preceding support portions (400), and tension may be generated in the second sheet portion (54).

[0050] According to embodiments of the present invention, an electrode manufacturing device (10) comprises a first sheet portion (52) and a second sheet portion (54) which are respectively located on one side and the other side in the width direction and extend in the length direction, and a laser irradiation unit (100) that irradiates a laser at a predetermined point (P) of the second sheet portion (54) of an electrode sheet (50) that is transported in the length direction; a first drum (210) which has a central axis (A) arranged parallel to the width direction and contacts the first sheet portion (52) in the thickness direction at a first angle section (N) to which the predetermined point (P) belongs, centered on the central axis (A); It may include a main support member (300) and one or more leading support members (400) that are positioned on the other side of the first drum (210) in the width direction, each at least partially positioned within the first angle section (N), and contact the second sheet section (54) in the thickness direction to generate tension on the second sheet section (54). The main support member (300) may face the laser irradiation section (100) and generate tension at the predetermined point (P). The one or more leading support members (400) may be positioned upstream of the main support member (300) in the direction of transport of the electrode sheet (50).

[0051] Accordingly, in the first angle section (N) where the electrode sheet (50) is bent and transported along the outer surface of the first drum (210), tension is generated in the second sheet section (54) by the main support section (300) as well as the preceding support section (400) upstream of the main support section (300), so that shaking (vibration) of the second sheet section (54) at the laser processing point (P) can be reduced or prevented. Accordingly, since laser processing defects can be reduced or prevented, the electrode defect rate can be lowered and electrode manufacturing costs can be reduced.

[0052] In particular, even if there is a ripple at the other end of the second sheet part (54) in the width direction due to the difference in elongation rate between the first sheet part (52) and the second sheet part (54), the second sheet part (54) can face the main support part (300) in a state where the ripple of the second sheet part (54) is mitigated or removed by the preceding support part (400), so the shaking (vibration) of the second sheet part (54) at the laser processing point (P) can be effectively reduced or prevented.

[0053] In addition, even if the electrode sheet (50) is conveyed while bending along the outer surface of the first drum (210) and the curvature of the swell of the second sheet part (54) is intensified, the swell of the second sheet part (54) can be mitigated or removed by the preceding support part (400) and the second sheet part (54) can face the main support part (300), so the shaking (vibration) of the second sheet part (54) at the laser processing point (P) can be effectively reduced or prevented.

[0054] Additionally, laser processing can be performed after the second sheet portion (54) is first deformed by the preceding support portion (400) to generate first tension, and then the second sheet portion (54) is secondarily deformed by the main support portion (300) to generate second tension. Accordingly, since the deformation of the second sheet portion (54) can be performed gradually, the degree of deformation of the second sheet portion (54) by the main support portion (300) can be reduced compared to when there is no preceding support portion (400). Therefore, the shaking (vibration) that occurs as the second sheet portion (54) is deformed by the main support portion (300) can be reduced compared to when there is no preceding support portion (400). Accordingly, the shaking (vibration) of the second sheet portion (54) at the laser processing point (P) can be reduced or prevented.

[0055] According to embodiments of the present invention, a drum unit (200) may be included, comprising a first drum (210) and a second drum (220) coupled to the first drum (210) and coaxial with the first drum (210). The second drum (220) may include a first portion (222) that is positioned on the other side of the first drum (210) in the width direction and faces the second seat portion (54) in the thickness direction at the first angle section (N). One or more of the preceding support portions (400) may be installed on the first portion (222).

[0056] Accordingly, the pre-support member (400) can be installed simply and stably.

[0057] According to embodiments of the present invention, the main support member (300) may be installed on the first portion (222) and may be installed on one side of one or more preceding support members (400) in a circumferential direction.

[0058] Accordingly, the main support member (300) can be installed simply and stably. In addition, since the main support member (300) and the preceding support member (400) are installed in a circumferential direction on the same first part (222), shaking (vibration) of the second sheet member (54) can be reduced or prevented.

[0059] According to embodiments of the present invention, at least one of the preceding support members (400) may be a rotatable roller.

[0060] Accordingly, since the friction between the preceding support member (400) and the second seat member (54) is reduced, the shaking (vibration) of the second seat member (54) can be reduced or prevented.

[0061] According to embodiments of the present invention, at least one of the preceding support members (400) can be installed to be freely rotatable.

[0062] Accordingly, the pre-support member (400) can be implemented at a low cost with a simple configuration.

[0063] According to embodiments of the present invention, the at least one leading support member (400) can be rotated by rotational driving.

[0064] Accordingly, friction between the preceding support member (400) and the second seat member (54) can be effectively reduced. Accordingly, shaking (vibration) of the second seat member (54) can be effectively reduced or prevented.

[0065] According to embodiments of the present invention, at least one of the preceding support members (400) may be a rotatable roller. The first portion (222) may include one or more installation grooves (G2) formed by being recessed radially inward from the outer surface of the first portion (222). The at least one preceding support member (400) may be inserted and installed in the one or more installation grooves (G2).

[0066] Accordingly, the size of the roller-like pre-support member (400) can be increased, making installation and maintenance of the pre-support member (400) easier and allowing the pre-support member (400) to be implemented simply. In addition, since the structural stability of the pre-support member (400) is improved, shaking of the second seat member (54) can be reduced or prevented.

[0067] According to embodiments of the present invention, each of the preceding support members (400) may be arranged at a predetermined distance from the main support member (300) in the direction of transfer.

[0068] Accordingly, the shaking (vibration) that occurs as the second sheet part (54) is initially deformed by the preceding support part (400) can be mitigated in the section between the preceding support part (400) and the main support part (300). Accordingly, the shaking (vibration) of the second sheet part (54) at the laser processing point (P) can be reduced or prevented.

[0069] According to embodiments of the present invention, in the conveying direction, the preceding support member (400) adjacent to the main support member (300) may be arranged adjacent to the main support member (300).

[0070] Accordingly, the ripple of the second sheet section (54), which is mitigated as it passes through the preceding support section (400), can be prevented from being partially restored in the section between the preceding support section (400) and the main support section (300). Accordingly, the shaking (vibration) of the second sheet section (54) at the laser processing point (P) can be reduced or prevented.

[0071] According to embodiments of the present invention, a plurality of the leading support members (400) may be arranged in the transfer direction.

[0072] Accordingly, in the first angle section (N) where the electrode sheet (50) is bent and transported along the outer surface of the first drum (210), tension is generated in the second sheet section (54) by the main support section (300) as well as by a plurality of preceding support sections (400) upstream of the main support section (300), thereby reducing or preventing shaking of the second sheet section (54) at the laser processing point (P). As a result, laser processing defects can be reduced or prevented, thereby lowering the electrode defect rate and reducing electrode manufacturing costs.

[0073] In particular, even if there is a ripple at the other end of the second sheet part (54) in the width direction due to the difference in elongation rate between the first sheet part (52) and the second sheet part (54), the second sheet part (54) can face the main support part (300) in a state where the ripple of the second sheet part (54) is mitigated or removed by the plurality of preceding support parts (400), so the shaking (vibration) of the second sheet part (54) at the laser processing point (P) can be effectively reduced or prevented.

[0074] In addition, even if the electrode sheet (50) is conveyed while bending along the outer surface of the first drum (210) and the curvature of the swell of the second sheet part (54) is intensified, the swell of the second sheet part (54) can be mitigated or removed by a plurality of preceding support parts (400) and the second sheet part (54) can face the main support part (300), so the shaking (vibration) of the second sheet part (54) at the laser processing point (P) can be effectively reduced or prevented.

[0075] According to embodiments of the present invention, the plurality of leading support members (400) may be spaced apart from each other at a predetermined distance in the transfer direction.

[0076] Accordingly, the shaking (vibration) that occurs as it is initially deformed by the upstream leading support member (400) can be mitigated in the section between the upstream leading support member (400) and the downstream leading support member (400). Accordingly, the shaking (vibration) of the second sheet member (54) at the laser processing point (P) can be reduced or prevented.

[0077] According to embodiments of the present invention, the electrode manufacturing method (S900) may include a laser processing process (S910) in which the laser irradiation unit (100) irradiates a laser at a predetermined point (P) of the second sheet portion (54) of the electrode sheet (50) that is transported in the longitudinal direction. In the laser processing process (S910), the first sheet portion (52) of the electrode sheet (50) moves in contact with the outer surface of the first drum (210) in the first angle section (N) and is bent together with the second sheet portion (54), and tension may be generated in the second sheet portion (54) by the second sheet portion (54) contacting the main support portion (300) and the one or more preceding support portions (400) that are each disposed at least partially within the first angle section (N). The main support member (300) can face the laser irradiation member (100) and generate tension at the predetermined point (P). One or more leading support members (400) can be positioned upstream of the main support member (300) in the direction of transport.

[0078] Accordingly, in the first angle section (N) where the electrode sheet (50) is bent and transported along the outer surface of the first drum (210), tension is generated in the second sheet section (54) by the main support section (300) as well as the preceding support section (400) upstream of the main support section (300), so that shaking (vibration) of the second sheet section (54) at the laser processing point (P) can be reduced or prevented. Accordingly, since laser processing defects can be reduced or prevented, the electrode defect rate can be lowered and electrode manufacturing costs can be reduced.

[0079] In particular, even if there is a ripple at the other end of the second sheet part (54) in the width direction due to the difference in elongation rate between the first sheet part (52) and the second sheet part (54), the second sheet part (54) can face the main support part (300) in a state where the ripple of the second sheet part (54) is mitigated or removed by the preceding support part (400), so the shaking (vibration) of the second sheet part (54) at the laser processing point (P) can be effectively reduced or prevented.

[0080] In addition, even if the electrode sheet (50) is conveyed while bending along the outer surface of the first drum (210) and the curvature of the swell of the second sheet part (54) is intensified, the swell of the second sheet part (54) can be mitigated or removed by the preceding support part (400) and the second sheet part (54) can face the main support part (300), so the shaking (vibration) of the second sheet part (54) at the laser processing point (P) can be effectively reduced or prevented.

[0081] Additionally, laser processing can be performed after the second sheet portion (54) is first deformed by the preceding support portion (400) to generate first tension, and then the second sheet portion (54) is secondarily deformed by the main support portion (300) to generate second tension. Accordingly, since the deformation of the second sheet portion (54) can be performed gradually, the degree of deformation of the second sheet portion (54) by the main support portion (300) can be reduced compared to when there is no preceding support portion (400). Therefore, the shaking (vibration) that occurs as the second sheet portion (54) is deformed by the main support portion (300) can be reduced compared to when there is no preceding support portion (400). Accordingly, the shaking (vibration) of the second sheet portion (54) at the laser processing point (P) can be reduced or prevented.

[0082] According to embodiments of the present invention, a plurality of the leading support members (400) may be arranged in the transfer direction. In the laser processing process (S910), the second sheet member (54) may come into contact with the plurality of leading support members (400), thereby generating tension in the second sheet member (54).

[0083] Accordingly, in the first angle section (N) where the electrode sheet (50) is bent and transported along the outer surface of the first drum (210), tension is generated in the second sheet section (54) by the main support section (300) as well as by a plurality of preceding support sections (400) upstream of the main support section (300), thereby reducing or preventing shaking of the second sheet section (54) at the laser processing point (P). As a result, laser processing defects can be reduced or prevented, thereby lowering the electrode defect rate and reducing electrode manufacturing costs.

[0084] In particular, even if there is a ripple at the other end of the second sheet part (54) in the width direction due to the difference in elongation rate between the first sheet part (52) and the second sheet part (54), the second sheet part (54) can face the main support part (300) in a state where the ripple of the second sheet part (54) is mitigated or removed by the plurality of preceding support parts (400), so the shaking (vibration) of the second sheet part (54) at the laser processing point (P) can be effectively reduced or prevented.

[0085] In addition, even if the electrode sheet (50) is conveyed while bending along the outer surface of the first drum (210) and the curvature of the swell of the second sheet part (54) is intensified, the swell of the second sheet part (54) can be mitigated or removed by a plurality of preceding support parts (400) and the second sheet part (54) can face the main support part (300), so the shaking (vibration) of the second sheet part (54) at the laser processing point (P) can be effectively reduced or prevented.

[0086] In addition to the effects described above, the specific effects of the present invention are described together with the specific details for implementing the invention below.

[0087] FIGS. 1 and FIGS. 2 are a perspective view and a side view of an electrode manufacturing apparatus according to one embodiment of the present invention.

[0088] FIGS. 3 to 5 are perspective, side, and exploded perspective views showing the drum unit, main support member, and leading support member of FIGS. 1 and 2.

[0089] FIG. 6 is a flowchart of an electrode manufacturing method according to one embodiment of the present invention.

[0090] [Explanation of the symbol]

[0091] 10: Electrode manufacturing device

[0092] 50: Electrode sheet P: Specified point

[0093] 52: 1st sheet section 54: 2nd sheet section

[0094] 100: Laser irradiation unit

[0095] 200: Drum unit

[0096] 210: 1st Drum A: Central Axis

[0097] 220: 2nd Drum

[0098] 222: Part 1 224: Part 2

[0099] G1: 1st installation home G2: 2nd installation home

[0100] 300: Main support section

[0101] 310: 1st Jig Unit 320: 2nd Jig Unit

[0102] 400: Preceding support

[0103] The aforementioned objectives, features, and advantages are described in detail below with reference to the attached drawings, thereby enabling those skilled in the art to easily implement the technical concept of the present invention. In describing the present invention, detailed descriptions of known technologies related to the present invention are omitted if it is determined that such descriptions would unnecessarily obscure the essence of the invention. Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the attached drawings. In the drawings, the same reference numerals are used to indicate the same or similar components.

[0104] Although terms such as "first," "second," etc., are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are used merely to distinguish one component from another, and unless specifically stated otherwise, the first component may also be the second component.

[0105] Throughout the specification, unless specifically stated otherwise, each component may be singular or plural.

[0106] In the following, the statement that any configuration is placed on the "upper (or lower)" of a component or on the "upper (or lower)" of a component may mean not only that any configuration is placed in contact with the upper (or lower) surface of said component, but also that another configuration may be interposed between said component and any configuration placed on (or below) said component.

[0107] In addition, where it is stated that one component is "connected," "combined," or "connected" to another component, it should be understood that while the components may be directly connected or connected to each other, another component may be "interposed" between each component, or each component may be "connected," "combined," or "connected" through another component.

[0108] Singular expressions used in this specification include plural expressions unless the context clearly indicates otherwise. In this application, terms such as "composed of" or "comprising" should not be interpreted as necessarily including all of the various components or steps described in the specification, and should be interpreted as meaning that some of the components or steps may be omitted or additional components or steps may be included.

[0109] FIGS. 1 and 2 are a perspective view and a side view of an electrode manufacturing apparatus according to an embodiment of the present invention. FIGS. 3 to 5 are a perspective view, a side view, and an exploded perspective view showing the drum unit, main support member, and leading support member of FIGS. 1 and 2. FIG. 6 is a flowchart of an electrode manufacturing method according to an embodiment of the present invention.

[0110] [Electrode manufacturing device]

[0111] Referring to FIGS. 1 to 5, an electrode manufacturing device (10) according to one embodiment may include a laser irradiation unit (100), a drum unit (200), a main support unit (300), and one or more leading support units (400).

[0112] The laser irradiation unit (100) can irradiate a laser at a predetermined point (P) of the second sheet portion (54) of the electrode sheet (50). The predetermined point (P) may be located within the first angle section (N) described later. The predetermined point (P) may belong to the first angle section (N) described later.

[0113] Here, the electrode sheet (50) may include a first sheet portion (52) and a second sheet portion (54). The electrode sheet (50) may be transported in the longitudinal direction. Here, the longitudinal direction may be the longitudinal direction of the electrode sheet (50).

[0114] The first sheet portion (52) and the second sheet portion (54) may be located on one side and the other side, respectively, in the width direction. Here, the width direction may be the width direction of the electrode sheet (50). The first sheet portion (52) and the second sheet portion (54) may be extended in the length direction. The first sheet portion (52) may be a retaining portion where an electrode active material is coated on the electrode current collector, and the second sheet portion (54) may be an uncoated portion where an electrode active material is not coated on the electrode current collector.

[0115] [Drum Unit]

[0116] The drum unit (200) may include a first drum (210). The drum unit (200) may include a second drum (220).

[0117] The first drum (210) may be cylindrical. The first drum (210) may be positioned with a central axis (A) parallel to the width direction. The first drum (210) may rotate around the central axis (A). The first drum (210) may come into contact with the first sheet portion (52) in the thickness direction (i.e., the radial direction of the first drum (200)). Specifically, the first drum (210) may come into contact with the first sheet portion (52) in the thickness direction at a first angle section (N) around the central axis (A).

[0118] Here, the thickness direction may be the thickness direction of the electrode sheet (50). Additionally, the radial direction of the first drum (200) may be a direction that moves closer to or further away from the center axis (A) along a straight line passing through the center axis (A) in a virtual plane perpendicular to the center axis (A).

[0119] The first drum (210) can guide the transport of the first sheet portion (52). The first drum (210) can generate tension in the first sheet portion (52).

[0120] The second drum (220) may be cylindrical or columnar. The second drum (220) may be combined with the first drum (210). The second drum (220) may be coaxial with the first drum (210). The second drum (220) may be fixed. The second drum (220) may include a first part (222) and a second part (224).

[0121] The first portion (222) may be positioned on the other side of the first drum (210) in the width direction. The first portion (222) may face the second sheet portion (54) in the thickness direction (i.e., the radial direction of the first drum (200)) in the aforementioned first angle section (N). The first portion (222) may or may not come into contact with the second sheet portion (54). The first portion (222) may guide the transport of the second sheet portion (54).

[0122] The first portion (222) may include a first installation groove (G1) and one or more second installation grooves (G2). The first installation groove (G1) and one or more second installation grooves (G2) may be formed by being recessed radially inward from the outer surface of the first portion (222) (Fig. 5). The first installation groove (G1) may be formed on one side of one or more second installation grooves (G2) in the circumferential direction (i.e., downstream side in the conveying direction of the electrode sheet (50). Here, the circumferential direction may be a direction surrounding the central axis (A) of the first drum (210). There may be multiple second installation grooves (G2).

[0123] The second part (224) may be located on one side of the first part (222) in the width direction. The second part (224) may be combined with the first part (222). The outer surface of the second part (224) may come into contact with the inner surface of the first drum (210). The second part (224) may support the first drum (210). The first drum (210) may rotate around the second part (224).

[0124] [Main Branch]

[0125] The main support member (300) may be positioned on the other side of the first drum (210) in the width direction. The main support member (300) may be positioned facing the first drum (210) in the width direction. The main support member (300) may be positioned at least partially within the first angle section (N). The main support member (300) may face the laser irradiation member (100). The main support member (300) may face the laser irradiation member (100) with a predetermined point (P) of the second sheet member (54) and / or an adjacent area between them. The main support member (300) may be in contact with the second sheet member (54) in the thickness direction.

[0126] The main support member (300) may be a pattern jig. The pattern jig may include a first jig member (310) and a second jig member (320) that are spaced apart by a predetermined distance in the longitudinal direction, face each other in close proximity, and contact the second sheet member (54) in the thickness direction. A laser may pass between the first jig member (310) and the second jig member (320).

[0127] However, this configuration is not limited to this. For example, the main support member (300) may include a pair of support rollers instead of a pattern jig. The pair of support rollers can replace the first jig part (310) and the second jig part (320) of the pattern jig. Specifically, the pair of support rollers may be spaced apart by a predetermined distance in the longitudinal direction, face each other in close proximity, and come into contact with the second sheet part (54) in the thickness direction. A laser may pass between the pair of support rollers.

[0128] The main support member (300) can guide the transport of the second sheet member (54). The main support member (300) can generate tension in the second sheet member (54). The main support member (300) can generate tension at a predetermined point (P).

[0129] The main support member (300) may be installed in the first portion (222) of the second drum (220) of the drum unit (200). For example, the main support member (300) may be inserted and installed in the aforementioned first installation groove (G1). The main support member (300) may be installed on one side of one or more preceding support members (400) in the circumferential direction (i.e., downstream side in the conveying direction of the electrode sheet (50)).

[0130] [Prior Support Department]

[0131] One or more leading support members (400) may be positioned on the other side of the first drum (210) in the width direction. One or more leading support members (400) may be positioned facing the first drum (210) in the width direction. Each leading support member (400) may be positioned at least partially within the first angle section (N). One or more leading support members (400) may be in contact with the second sheet member (54) in the thickness direction.

[0132] One or more leading support members (400) can guide the transport of the second sheet member (54). One or more leading support members (400) can generate tension in the second sheet member (54).

[0133] One or more leading support members (400) may be positioned upstream of the main support member (300) in the direction of transport of the electrode sheet (50).

[0134] Accordingly, in the first angle section (N) where the electrode sheet (50) is bent and transported along the outer surface of the first drum (210), tension is generated in the second sheet section (54) by the main support section (300) as well as the preceding support section (400) upstream of the main support section (300), so that shaking (vibration) of the second sheet section (54) at the laser processing point (P) can be reduced or prevented. Accordingly, since laser processing defects can be reduced or prevented, the electrode defect rate can be lowered and electrode manufacturing costs can be reduced.

[0135] In particular, even if there is a ripple at the other end of the second sheet part (54) in the width direction due to the difference in elongation rate between the first sheet part (52) and the second sheet part (54), the second sheet part (54) can face the main support part (300) in a state where the ripple of the second sheet part (54) is mitigated or removed by the preceding support part (400), so the shaking (vibration) of the second sheet part (54) at the laser processing point (P) can be effectively reduced or prevented.

[0136] In addition, even if the electrode sheet (50) is conveyed while bending along the outer surface of the first drum (210) and the curvature of the swell of the second sheet part (54) is intensified, the swell of the second sheet part (54) can be mitigated or removed by the preceding support part (400) and the second sheet part (54) can face the main support part (300), so the shaking (vibration) of the second sheet part (54) at the laser processing point (P) can be effectively reduced or prevented.

[0137] Additionally, laser processing can be performed after the second sheet portion (54) is first deformed by the preceding support portion (400) to generate first tension, and then the second sheet portion (54) is secondarily deformed by the main support portion (300) to generate second tension. Accordingly, since the deformation of the second sheet portion (54) can be performed gradually, the degree of deformation of the second sheet portion (54) by the main support portion (300) can be reduced compared to when there is no preceding support portion (400). Therefore, the shaking (vibration) that occurs as the second sheet portion (54) is deformed by the main support portion (300) can be reduced compared to when there is no preceding support portion (400). Accordingly, the shaking (vibration) of the second sheet portion (54) at the laser processing point (P) can be reduced or prevented.

[0138] One or more pre-support members (400) may be installed in the first part (222) of the second drum (220).

[0139] Accordingly, the pre-support member (400) can be installed simply and stably.

[0140] At this time, as described above, the main support member (300) may be installed in the first part (222) and may be installed on one side (i.e., downstream side in the transport direction) of one or more preceding support members (400) in the circumferential direction.

[0141] Accordingly, the main support member (300) can be installed simply and stably. In addition, since the main support member (300) and the preceding support member (400) are installed in a circumferential direction on the same first part (222), shaking (vibration) of the second sheet member (54) can be reduced or prevented.

[0142] At least one leading support member (400) may be a rotatable roller.

[0143] Accordingly, since the friction between the preceding support member (400) and the second seat member (54) is reduced, the shaking (vibration) of the second seat member (54) can be reduced or prevented.

[0144] The rotation axis of at least one leading support member (400), which is a roller, can be parallel to the width direction.

[0145] At least one leading support member (400), which is a roller, can be installed to rotate freely.

[0146] Accordingly, the pre-support member (400) can be implemented at a low cost with a simple configuration.

[0147] At least one leading support member (400), which is a roller, can be rotated by rotational drive.

[0148] Accordingly, friction between the preceding support member (400) and the second seat member (54) can be effectively reduced. Accordingly, shaking (vibration) of the second seat member (54) can be effectively reduced or prevented.

[0149] At least one leading support member (400), which is a roller, can be inserted and installed in one or more second installation grooves (G2) of the first part (222) of the second drum (220).

[0150] Accordingly, the size of the roller-like pre-support member (400) can be increased, making installation and maintenance of the pre-support member (400) easier and allowing the pre-support member (400) to be implemented simply. In addition, since the structural stability of the pre-support member (400) is improved, shaking of the second seat member (54) can be reduced or prevented.

[0151] Each leading support member (400) can be positioned at a predetermined distance from the main support member (300) in the direction of transport of the electrode sheet (50).

[0152] Accordingly, the shaking (vibration) that occurs as the second sheet part (54) is initially deformed by the preceding support part (400) can be mitigated in the section between the preceding support part (400) and the main support part (300). Accordingly, the shaking (vibration) of the second sheet part (54) at the laser processing point (P) can be reduced or prevented.

[0153] At least one leading support member (400) may be positioned adjacent to the main support member (300) in the direction of transport of the electrode sheet (50). That is, in the direction of transport of the electrode sheet (50), a leading support member (400) adjacent to the main support member (300) may be positioned adjacent to the main support member (300).

[0154] Accordingly, the ripple of the second sheet section (54), which is mitigated as it passes through the preceding support section (400), can be prevented from being partially restored in the section between the preceding support section (400) and the main support section (300). Accordingly, the shaking (vibration) of the second sheet section (54) at the laser processing point (P) can be reduced or prevented.

[0155] For example, the distance between the leading support member (400) and the main support member (300) is k (0) to the approximate wavelength of the main wave of the second sheet member (54) or the approximate average wavelength of the wave of the second sheet member (54). <k<1, k는 실수)를 곱한 값일 수 있다. 예를 들면, k는 1 / 2일 수 있다.

[0156] Multiple leading support members (400) may be arranged in the direction of transport of the electrode sheet (50).

[0157] Accordingly, in the first angle section (N) where the electrode sheet (50) is bent and transported along the outer surface of the first drum (210), tension is generated in the second sheet section (54) by the main support section (300) as well as by a plurality of preceding support sections (400) upstream of the main support section (300), thereby reducing or preventing shaking of the second sheet section (54) at the laser processing point (P). As a result, laser processing defects can be reduced or prevented, thereby lowering the electrode defect rate and reducing electrode manufacturing costs.

[0158] In particular, even if there is a ripple at the other end of the second sheet part (54) in the width direction due to the difference in elongation rate between the first sheet part (52) and the second sheet part (54), the second sheet part (54) can face the main support part (300) in a state where the ripple of the second sheet part (54) is mitigated or removed by the plurality of preceding support parts (400), so the shaking (vibration) of the second sheet part (54) at the laser processing point (P) can be effectively reduced or prevented.

[0159] In addition, even if the electrode sheet (50) is conveyed while bending along the outer surface of the first drum (210) and the curvature of the swell of the second sheet part (54) is intensified, the swell of the second sheet part (54) can be mitigated or removed by a plurality of preceding support parts (400) and the second sheet part (54) can face the main support part (300), so the shaking (vibration) of the second sheet part (54) at the laser processing point (P) can be effectively reduced or prevented.

[0160] A plurality of leading support members (400) may be spaced apart from each other at a predetermined distance in the direction of transport of the electrode sheet (50).

[0161] Accordingly, the shaking (vibration) that occurs as it is initially deformed by the upstream leading support member (400) can be mitigated in the section between the upstream leading support member (400) and the downstream leading support member (400). Accordingly, the shaking (vibration) of the second sheet member (54) at the laser processing point (P) can be reduced or prevented.

[0162] [Electrode Manufacturing Method]

[0163] Referring to FIG. 6, an electrode manufacturing method (S900) according to one embodiment of the present invention may include a laser processing process (S910).

[0164] In the laser processing process (S910), the laser irradiation unit (100) can irradiate a laser at a predetermined point (P) of the second sheet portion (54) of the electrode sheet (50) that is transported in the longitudinal direction.

[0165] Additionally, the first sheet portion (52) of the electrode sheet (50) may be bent and moved together with the second sheet portion (54) in contact with the outer surface of the first drum (210) in the first angle section (N). Additionally, tension may be generated in the second sheet portion (54) by contacting the main support portion (300) and one or more leading support portions (400), each of which are disposed at least partially within the first angle section (N). At this time, the main support portion (300) may face the laser irradiation portion (100) and generate tension at a predetermined point (P). Additionally, one or more leading support portions (400) may be disposed upstream of the main support portion (300) in the direction of transport of the electrode sheet (50).

[0166] Accordingly, in the first angle section (N) where the electrode sheet (50) is bent and transported along the outer surface of the first drum (210), tension is generated in the second sheet section (54) by the main support section (300) as well as the preceding support section (400) upstream of the main support section (300), so that shaking (vibration) of the second sheet section (54) at the laser processing point (P) can be reduced or prevented. Accordingly, since laser processing defects can be reduced or prevented, the electrode defect rate can be lowered and electrode manufacturing costs can be reduced.

[0167] In particular, even if there is a ripple at the other end of the second sheet part (54) in the width direction due to the difference in elongation rate between the first sheet part (52) and the second sheet part (54), the second sheet part (54) can face the main support part (300) in a state where the ripple of the second sheet part (54) is mitigated or removed by the preceding support part (400), so the shaking (vibration) of the second sheet part (54) at the laser processing point (P) can be effectively reduced or prevented.

[0168] In addition, even if the electrode sheet (50) is conveyed while bending along the outer surface of the first drum (210) and the curvature of the swell of the second sheet part (54) is intensified, the swell of the second sheet part (54) can be mitigated or removed by the preceding support part (400) and the second sheet part (54) can face the main support part (300), so the shaking (vibration) of the second sheet part (54) at the laser processing point (P) can be effectively reduced or prevented.

[0169] Additionally, laser processing can be performed after the second sheet portion (54) is first deformed by the preceding support portion (400) to generate first tension, and then the second sheet portion (54) is secondarily deformed by the main support portion (300) to generate second tension. Accordingly, since the deformation of the second sheet portion (54) can be performed gradually, the degree of deformation of the second sheet portion (54) by the main support portion (300) can be reduced compared to when there is no preceding support portion (400). Therefore, the shaking (vibration) that occurs as the second sheet portion (54) is deformed by the main support portion (300) can be reduced compared to when there is no preceding support portion (400). Accordingly, the shaking (vibration) of the second sheet portion (54) at the laser processing point (P) can be reduced or prevented.

[0170] When multiple leading support members (400) are arranged in the direction of transport of the electrode sheet (50), during the laser processing process (S910), the second sheet member (54) may come into contact with multiple leading support members (400), and tension may be generated in the second sheet member (54).

[0171] Accordingly, in the first angle section (N) where the electrode sheet (50) is bent and transported along the outer surface of the first drum (210), tension is generated in the second sheet section (54) by the main support section (300) as well as by a plurality of preceding support sections (400) upstream of the main support section (300), thereby reducing or preventing shaking of the second sheet section (54) at the laser processing point (P). As a result, laser processing defects can be reduced or prevented, thereby lowering the electrode defect rate and reducing electrode manufacturing costs.

[0172] In particular, even if there is a ripple at the other end of the second sheet part (54) in the width direction due to the difference in elongation rate between the first sheet part (52) and the second sheet part (54), the second sheet part (54) can face the main support part (300) in a state where the ripple of the second sheet part (54) is mitigated or removed by the plurality of preceding support parts (400), so the shaking (vibration) of the second sheet part (54) at the laser processing point (P) can be effectively reduced or prevented.

[0173] In addition, even if the electrode sheet (50) is conveyed while bending along the outer surface of the first drum (210) and the curvature of the swell of the second sheet part (54) is intensified, the swell of the second sheet part (54) can be mitigated or removed by a plurality of preceding support parts (400) and the second sheet part (54) can face the main support part (300), so the shaking (vibration) of the second sheet part (54) at the laser processing point (P) can be effectively reduced or prevented.

[0174] Meanwhile, matters not mentioned in relation to the electrode manufacturing method (S900) can be inferred from the electrode manufacturing device (10).

[0175] The embodiments described above should be understood as exemplary in all respects and not limiting, and the scope of the invention will be defined by the claims set forth below rather than by the detailed description above. Furthermore, the meaning and scope of the claims set forth below, as well as all modifications and variations derived from equivalents thereof, should be interpreted as being included within the scope of the invention.

[0176] Although the present invention has been described above with reference to the illustrated drawings, the present invention is not limited by the embodiments and drawings disclosed in this specification, and it is obvious that various modifications can be made by a person skilled in the art within the scope of the technical concept of the present invention. Furthermore, even if the effects of the configuration according to the present invention were not explicitly described while describing the embodiments of the present invention above, it is natural to acknowledge that the effects predictable by said configuration should also be recognized.

Claims

1. A laser irradiation unit (100) comprising a first sheet portion (52) and a second sheet portion (54) that are respectively located on one side and the other side in the width direction and extend in the length direction, and irradiating a laser at a predetermined point (P) of the second sheet portion (54) of an electrode sheet (50) that is transported in the length direction; A first drum (210) having a central axis (A) arranged parallel to the width direction and contacting the first sheet portion (52) in the thickness direction at a first angle section (N) to which the predetermined point (P) belongs, centered on the central axis (A); and It includes a main support member (300) that is positioned on the other side of the first drum (210) in the width direction, each being positioned at least partially within the first angle section (N), and contacting the second sheet member (54) in the thickness direction and generating tension in the second sheet member (54), and one or more preceding support members (400). The main support member (300) faces the laser irradiation member (100) and generates tension at the predetermined point (P), The above one or more leading support members (400) are positioned upstream of the main support member (300) in the direction of transport of the electrode sheet (50). Electrode manufacturing device.

2. In Claim 1, A drum unit (200) comprising the first drum (210) and a second drum (220) coupled to the first drum (210) and coaxial with the first drum (210). The second drum (220) is positioned on the other side of the first drum (210) in the width direction and includes a first portion (222) facing the second sheet portion (54) in the thickness direction in the first angle section (N). The above one or more leading support members (400) are installed in the first part (222), forming an electrode manufacturing device.

3. In Claim 2, The above main support member (300) is installed in the above first part (222) and is installed on one side of the above one or more preceding support members (400) in the circumferential direction, electrode manufacturing device.

4. In any one of claims 1 to 3, An electrode manufacturing device in which at least one of the above-mentioned leading support members (400) is a rotatable roller.

5. In Claim 4, The electrode manufacturing device, wherein at least one leading support member (400) is installed to be freely rotatable.

6. In Claim 4, The above at least one leading support member (400) is an electrode manufacturing device that rotates by rotational drive.

7. In claim 2 or claim 3, At least one of the above-mentioned leading support members (400) is a rotatable roller, and The first portion (222) includes one or more installation grooves (G2) formed by being recessed radially inward from the outer surface of the first portion (222). The electrode manufacturing device, wherein at least one preceding support member (400) is inserted and installed in one or more installation grooves (G2).

8. In any one of claims 1 to 7, Each of the above-mentioned leading support members (400) is arranged at a predetermined distance from the main support member (300) in the direction of transfer, in an electrode manufacturing device.

9. In any one of claims 1 to 8, An electrode manufacturing device in which, in the above transfer direction, the preceding support member (400) adjacent to the main support member (300) is positioned adjacent to the main support member (300).

10. In any one of claims 1 to 9, The above-mentioned leading support member (400) is an electrode manufacturing device in which a plurality of such members are arranged in the above-mentioned transfer direction.

11. In Claim 10, The above-mentioned plurality of leading support members (400) are spaced apart from each other at a predetermined distance in the transfer direction, forming an electrode manufacturing device.

12. A method for manufacturing an electrode (S900) using an electrode manufacturing apparatus (10) according to any one of claims 1 to 9, The above laser processing process (S910) includes irradiating a laser at a predetermined point (P) of the second sheet portion (54) of the electrode sheet (50) that is transported in the longitudinal direction, and In the above laser processing process (S910), the first sheet portion (52) of the electrode sheet (50) moves in contact with the outer surface of the first drum (210) in the first angle section (N) and is bent together with the second sheet portion (54), and tension is generated in the second sheet portion (54) as the second sheet portion (54) contacts the main support portion (300) and the one or more preceding support portions (400) each placed at least partially within the first angle section (N). The main support member (300) faces the laser irradiation member (100) and generates tension at the predetermined point (P), The above one or more leading support members (400) are positioned upstream of the main support member (300) in the direction of transfer, Electrode manufacturing method.

13. In Claim 12, The above-mentioned leading support members (400) are arranged in multiple numbers in the above-mentioned transfer direction, and In the above laser processing process (S910), the second sheet portion (54) comes into contact with the plurality of preceding support portions (400), and tension is generated in the second sheet portion (54), in an electrode manufacturing process.

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