Roll-to-roll apparatus

Abstract

A roll-to-roll device according to an embodiment of the present disclosure comprises: an unwinder for unwinding an electrode sheet for roll-to-roll travel; a rewinder spaced apart from the unwinder and winding the electrode sheet; and a first roller section and a second roller section disposed between the unwinder and the rewinder and supporting the electrode sheet during roll-to-roll travel; wherein the first roller section and the second roller section face each other, the first roller section includes a first roller supporting the electrode sheet; and a first plate supporting the first roller, and the second roller section includes a second roller supporting the electrode sheet; and a second plate supporting the second roller, wherein the first roller is configured to be tilted with respect to the first plate, the second roller is configured to be tilted with respect to the second plate, or the first roller and the second roller are configured to be simultaneously tilted with respect to the first plate and the second plate, respectively.

Description

Technology Field

[0001] The present disclosure relates to a roll-to-roll device. Background Technology

[0002] Unlike primary batteries, secondary batteries are rechargeable, and demand is gradually increasing due to the potential for miniaturization and high capacity. These secondary batteries are widely used as power sources for mobile phones, laptops, and electric vehicle motors.

[0003] A secondary battery comprises an electrode assembly consisting of a positive electrode, a negative electrode, and a separator interposed between the positive and negative electrodes, and a case housing the electrode assembly. The positive electrode or the negative electrode can be manufactured by coating an active material onto an electrode sheet and then rolling the active material-coated portion. However, there is a problem in that phenomena such as camber occur on the electrode sheet due to the difference in elongation between the coated portion and the uncoated portion during the rolling of the electrode sheet.

[0004] In the process of manufacturing the above electrode assembly, the electrode sheet may be driven roll-to-roll by a roll-to-roll device. Meanwhile, if a phenomenon such as ripples occurs on the electrode sheet, the tension applied to each region of the electrode sheet may differ when the electrode sheet is driven roll-to-roll, and breakage of the electrode sheet may occur. The problem to be solved

[0005] One aspect of the present disclosure is to provide a roll-to-roll device for resolving non-uniformity of tension applied to an electrode sheet.

[0006] Another aspect of the present disclosure is to provide a roll-to-roll device for reducing the risk of electrode breakage during the manufacture of a secondary battery.

[0007] Meanwhile, the present disclosure can be widely applied in the field of green technology, such as electric vehicles, battery charging stations, energy storage systems (ESS), and other photovoltaic and wind power generation that utilize batteries. In addition, the present disclosure can be used in eco-friendly mobility, including electric vehicles and hybrid vehicles, to prevent climate change by suppressing air pollution and greenhouse fluid emissions. means of solving the problem

[0008] A roll-to-roll device according to an embodiment of the present disclosure comprises: an unwinder for unwinding an electrode sheet for roll-to-roll travel; a rewinder spaced apart from the unwinder and winding the electrode sheet; and a first roller section and a second roller section disposed between the unwinder and the rewinder and supporting the electrode sheet during roll-to-roll travel; wherein the first roller section and the second roller section face each other, the first roller section includes a first roller supporting the electrode sheet; and a first plate supporting the first roller, and the second roller section includes a second roller supporting the electrode sheet; and a second plate supporting the second roller, wherein the first roller is configured to be tilted with respect to the first plate, the second roller is configured to be tilted with respect to the second plate, or the first roller and the second roller are configured to be simultaneously tilted with respect to the first plate and the second plate, respectively.

[0009] According to an embodiment, the first roller part may further include a first roller driving part that tilts the first roller in a direction perpendicular to the roll-to-roll driving direction, and the second roller part may further include a second roller driving part that tilts the second roller in a direction perpendicular to the roll-to-roll driving direction.

[0010] According to an embodiment, the apparatus further comprises a first sensor unit for detecting pressure applied to the first roller by the electrode sheet; and a second sensor unit for detecting pressure applied to the second roller by the electrode sheet, wherein the first sensor unit includes a first sensor for detecting a first pressure applied to one end of the first roller by the electrode sheet; and a second sensor for detecting a second pressure applied to the other end of the first roller by the electrode sheet, and the second sensor unit may include a third sensor for detecting a third pressure applied to one end of the second roller by the electrode sheet; and a fourth sensor for detecting a fourth pressure applied to the other end of the second roller by the electrode sheet.

[0011] According to an embodiment, the apparatus may further include a first tilting plate that tilts to have a first inclination when the difference between the first pressure and the second pressure is greater than or equal to a predetermined value; and a second tilting plate that tilts to have a second inclination when the difference between the third pressure and the fourth pressure is greater than or equal to a predetermined value.

[0012] According to an embodiment, the first roller driving unit tilts the first roller by a first driving signal calculated based on the first inclination, and the second roller driving unit tilts the second roller by a second driving signal calculated based on the second inclination.

[0013] According to an embodiment, the apparatus further comprises a third roller portion disposed between the first roller portion and the second roller portion, wherein the third roller portion comprises a third roller supporting the electrode sheet; a third plate configured to support the third roller and be movable; and a third roller driving portion for tilting the third roller, and the third roller may be configured to be tilted relative to the third plate.

[0014] According to an embodiment, each of the first roller and the second roller may be configured to be inclined in a first direction or in a direction opposite to the first direction with respect to the first plate and the second plate, and the third roller may be configured to be inclined in a second direction different from the first direction or in a direction opposite to the second direction with respect to the third plate.

[0015] According to an embodiment, the direction in which the third plate moves and the direction in which the third roller tilts may be opposite to each other.

[0016] According to an embodiment, the third sensor unit further comprises a third sensor unit for detecting pressure applied to the third roller by the electrode sheet, wherein the third sensor unit comprises a fifth sensor for detecting a fifth pressure acting on one end of the third roller by the electrode sheet; and It may include a sixth sensor that detects a sixth pressure acting on the other end of the third roller by the electrode sheet.

[0017] A roll-to-roll device according to an embodiment of the present disclosure comprises: an unwinder for unwinding an electrode sheet for roll-to-roll travel; a rewinder spaced apart from the unwinder and for winding the electrode sheet; and first to third roller sections disposed between the unwinder and the rewinder and supporting the electrode sheet during roll-to-roll travel; wherein the first roller section and the second roller section face each other, and the third roller section is disposed between the first roller section and the second roller section, and the first roller section includes a first roller supporting the electrode sheet; and a first plate supporting the first roller; the second roller section includes a second roller supporting the electrode sheet; and a second plate supporting the second roller; and the third roller section includes a third roller supporting the electrode sheet. and includes a third plate configured to support and move the third roller, wherein the first roller is configured not to tilt with respect to the first plate, the second roller is configured not to tilt with respect to the second plate, and the third roller may be configured to tilt with respect to the third plate. Effects of the invention

[0018] According to an embodiment of the present disclosure, a roll-to-roll device for resolving non-uniformity of tension applied to an electrode sheet may be provided.

[0019] According to an embodiment of the present disclosure, a roll-to-roll device may be provided to reduce the risk of electrode breakage during secondary battery manufacturing.

[0020] Meanwhile, the busbar assembly according to the present disclosure can be widely applied in green technology fields such as electric vehicles, battery charging stations, energy storage systems (ESS), and other photovoltaic and wind power generation using battery cells.

[0021] In addition, the busbar assembly according to the present disclosure can be used in eco-friendly mobility, including electric vehicles and hybrid vehicles, to prevent climate change by suppressing air pollution and greenhouse fluid emissions. Brief explanation of the drawing

[0022] FIG. 1a is a schematic cross-sectional view illustrating a roll-to-roll device according to one embodiment. FIG. 1b is a schematic cross-sectional view illustrating that each of the first roller and the second roller is tilted with respect to each of the first plate and the second plate according to one embodiment. FIGS. 2 and FIGS. 3 are schematic cross-sectional views for explaining a first sensor unit and a second sensor unit according to one embodiment. FIGS. 4 and FIGS. 5 are schematic cross-sectional views illustrating the inclination of a first roller according to one embodiment. FIGS. 6 and 7 are schematic cross-sectional views illustrating the inclination of a second roller according to one embodiment. FIG. 8 is a schematic cross-sectional view illustrating a roll-to-roll device according to another embodiment. FIGS. 9 and FIGS. 10 are schematic cross-sectional views for illustrating a third sensor unit according to one embodiment. FIGS. 11 and 12 are schematic cross-sectional views illustrating the tilting of the third roller and the movement of the third plate according to one embodiment. FIGS. 13a and FIGS. 13b are diagrams for schematically illustrating the relationship between the movement of the third plate and the pressure applied to the electrode according to one embodiment. FIG. 14 is a schematic cross-sectional view illustrating a roll-to-roll device according to another embodiment. Specific details for implementing the invention

[0023] Hereinafter, a roll-to-roll device according to various embodiments of the present disclosure will be described through preferred embodiments of the present disclosure with reference to the attached drawings. The roll-to-roll device according to the present disclosure can be used in a secondary battery manufacturing process. For example, the roll-to-roll device can be used in a coating process (e.g., a process of coating an electrode slurry onto an electrode current collector), a roll pressing process (e.g., a process of flattening and stretching the surface of an electrode sheet coated with an electrode slurry), a slitting process (e.g., a process of cutting an electrode sheet to the specifications of a positive electrode and a negative electrode), and a winding process (e.g., a process of winding an electrode sheet) for manufacturing a secondary battery.

[0024] Before proceeding with the explanation, when a part is said to "include" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components.

[0025] In addition, in various embodiments, components having the same configuration are described representatively in one embodiment using the same reference numerals, and in other embodiments, only other components are described.

[0026] Structural or functional descriptions of the embodiments disclosed in this specification or application are merely illustrative for the purpose of explaining embodiments according to the technical concept of this disclosure. Embodiments according to the technical concept of this disclosure may be implemented in various forms other than those disclosed in this specification or application, and the technical concept of this disclosure is not to be interpreted as being limited to the embodiments described in this specification or application.

[0027] A roll-to-roll apparatus according to various embodiments of the present disclosure will be described in more detail through the drawings below.

[0028] FIG. 1a is a schematic cross-sectional view illustrating a roll-to-roll device according to one embodiment. FIG. 1b is a schematic cross-sectional view illustrating that each of the first roller and the second roller is tilted with respect to each of the first plate and the second plate according to one embodiment.

[0029] Referring to FIG. 1a and FIG. 1b, a roll-to-roll device (100) according to one embodiment may include an unwinder (UW) for unwinding an electrode sheet (ES) for roll-to-roll travel, a rewinder (RW) spaced apart from the unwinder (UW) for winding the electrode sheet (ES), and a first roller part (RP1) and a second roller part (RP2) spaced between the unwinder (UW) and the rewinder (RW) for supporting the electrode sheet (ES) during roll-to-roll travel.

[0030] An unwinder (UW) may be configured to unwind an electrode sheet (ES). A rewinder (RW) may be configured to wind the electrode sheet (ES). Accordingly, the electrode sheet (ES) may move (or travel) between the unwinder (UW) and the rewinder (RW).

[0031] The first roller section (RP1) may be positioned above the unwinder (UW) and rewinder (RW). For example, the first roller section (RP1) may be positioned in a first direction (DR1) spaced apart from the unwinder (UW) and rewinder (RW). The second roller section (RP2) may be positioned below the unwinder (UW) and rewinder (RW). For example, the second roller section (RP2) may be positioned in a direction opposite to the first direction (DR1) spaced apart from the unwinder (UW) and rewinder (RW). The first roller section (RP1) and the second roller section (RP2) may be positioned facing each other. For example, the first roller section (RP1) and the second roller section (RP2) may face each other.

[0032] The first roller section (RP1) and the second roller section (RP2) support the electrode sheet (ES) during roll-to-roll travel and can move the electrode sheet (ES) between the unwinder (UW) and the rewinder (RW). For example, the electrode sheet (ES) can be unwound from the unwinder (UW), rolled-to-roll traveled by the first roller section (RP1) and the second roller section (RP2), and wound in the rewinder (RW). For example, the electrode sheet (ES) can be rolled-to-roll traveled along a roll-to-roll travel direction that is parallel to the second direction (DR2), which is perpendicular to the first direction (DR1) (for example, a direction opposite to the second direction (DR2)), unwound from the unwinder (UW), and wound in the rewinder (RW).

[0033] The first roller section (RP1) may include a first roller (TR1) that supports an electrode sheet (ES), a first plate (PL1) that supports the first roller (TR1), and a first sensor section (SS1) that detects pressure applied to the first roller (TR1) by the electrode sheet (ES).

[0034] The first roller (TR1) may be configured to rotate. For example, the first roller (TR1) may be configured to rotate about one axis. The first roller (TR1) may be configured to contact the electrode sheet (ES). By the rotation and contact of the first roller (TR1), the electrode sheet (ES) may move between the unwinder (UW) and the rewinder (RW).

[0035] According to an embodiment, a plurality of first rollers (TR1) may be provided. A plurality of first rollers (TR1) may be spaced apart in a second direction (DR2).

[0036] The first roller (TR1) may be configured to be tilted relative to the first plate (PL1). The first roller (TR1) may be configured to be tilted relative to the first plate (PL1) when the tension applied to one region (e.g., one end) and the other region (e.g., the other end) of the electrode sheet (ES) is different from each other. The first roller (TR1) may be configured to be tilted relative to the first plate (PL1) in a direction perpendicular to the roll-to-roll travel direction (e.g., the first direction (DR1) or the direction opposite to the first direction (DR1). For example, the first roller (TR1) may be configured to be tilted relative to the first plate (PL1) in the first direction (DR1) or the direction opposite to the first direction (DR1). For example, the first roller (TR1) may be configured to be inclined in an up-and-down direction (e.g., in the direction of gravity (e.g., opposite direction of the first direction (DR1)) or in the direction opposite to the direction of gravity (e.g., the first direction (DR1)).

[0037] The first roller unit (RP1) may further include a first roller drive unit (not shown) that tilts the first roller (TR1) in a direction perpendicular to the roll-to-roll travel direction (e.g., a first direction (DR1) or a direction opposite to the first direction (DR1)). For example, the first roller unit (RP1) may further include a first roller drive unit that tilts the first roller (TR1) in the first direction (DR1) or a direction opposite to the first direction (DR1). For example, the first roller unit (RP1) may further include a first roller drive unit that tilts the first roller (TR1) in an up-down direction (e.g., a direction opposite to the gravity direction (e.g., a direction opposite to the first direction (DR1)) or a direction opposite to the gravity direction (e.g., a first direction (DR1)). According to an embodiment, the first roller drive unit may include a servo motor. However, the present disclosure is not limited thereto.

[0038] According to an embodiment, when a plurality of first rollers (TR1) are provided, the plurality of first rollers (TR1) may be tilted by the same first roller drive unit (e.g., a servo motor). For example, a single servo motor may tilt the plurality of first rollers (TR1). However, the present disclosure is not limited thereto.

[0039] The first sensor unit (SS1) can detect the pressure applied to the first roller (TR1) by the electrode sheet (ES). Through this, the first sensor unit (SS1) can detect that the tension applied to one area and another area of ​​the electrode sheet (ES) is different. This will be described later with reference to FIGS. 2 and FIGS. 3.

[0040] According to an embodiment, when a plurality of first rollers (TR1) are provided, the first sensor unit (SS1) may be positioned adjacent to the first roller (TR1) closest to the unwinder (UW) among the first rollers (TR1). For example, when a plurality of first rollers (TR1) are provided, the first sensor unit (SS1) may detect pressure applied by the electrode sheet (ES) to the first roller (TR1) closest to the unwinder (UW) among the first rollers (TR1).

[0041] The second roller section (RP2) may be configured similarly to the first roller section (RP1). For example, the second roller section (RP2) may include a second roller (TR2) that supports an electrode sheet (ES), a second plate (PL2) that supports the second roller (TR2), and a second sensor section (SS2) that detects pressure applied to the second roller (TR2) by the electrode sheet (ES).

[0042] In order to control the movement speed of the electrode sheet (ES) during the process of unwinding or winding the electrode sheet (ES), the second roller unit (RP2) may be configured to rise in the first direction (DR1) or descend in the opposite direction of the first direction (DR1). For example, if the winding speed of the electrode sheet (ES) is greater than the unwinding speed of the electrode sheet (ES), the second roller unit (RP2) may rise in the first direction (DR1), and if the winding speed of the electrode sheet (ES) is less than the unwinding speed of the electrode sheet (ES), the second roller unit (RP2) may descend in the opposite direction of the first direction (DR1).

[0043] The second roller (TR2) may be configured to rotate. For example, the second roller (TR2) may be configured to rotate about one axis. The second roller (TR2) may be configured to contact the electrode sheet (ES). By the rotation and contact of the second roller (TR2), the electrode sheet (ES) may move between the unwinder (UW) and the rewinder (RW).

[0044] According to an embodiment, a plurality of second rollers (TR2) may be provided. A plurality of second rollers (TR2) may be spaced apart in a second direction (DR2). A plurality of second rollers (TR2) may be arranged alternately with a plurality of first rollers (TR1). For example, a plurality of second rollers (TR2) and a plurality of first rollers (TR1) may be arranged alternately along a first direction (DR1) and a direction opposite to the first direction (DR1).

[0045] The second roller (TR2) may be configured to be tilted with respect to the second plate (PL2). The second roller (TR2) may be configured to be tilted with respect to the second plate (PL2) when the tension applied to one area (e.g., one end) and the other area (e.g., the other end) of the electrode sheet (ES) are different. The second roller (TR2) may be configured to be tilted with respect to the second plate (PL2) in a direction perpendicular to the roll-to-roll travel direction (e.g., the first direction (DR1) or the direction opposite to the first direction (DR1). For example, the second roller (TR2) may be configured to be tilted with respect to the second plate (PL2) in the first direction (DR1) or the direction opposite to the first direction (DR1). For example, the second roller (TR2) may be configured to be inclined in an up-and-down direction (e.g., in the direction of gravity (e.g., opposite to the first direction (DR1)) or in the direction opposite to the direction of gravity (e.g., the first direction (DR1)) with respect to the second plate (PL2).

[0046] According to one embodiment of the roll-to-roll device (100), the first roller (TR1) and the second roller (TR2) may be configured to tilt simultaneously with respect to the first plate (PL1) and the second plate (PL2), respectively. For example, the first roller (TR1) may be configured to tilt with respect to the first plate (PL1), and the second roller (TR2) may be configured to tilt with respect to the second plate (PL2). However, the present disclosure is not limited thereto, and according to the embodiment, either the first roller (TR1) or the second roller (TR2) may be configured to tilt.

[0047] The second roller unit (RP2) may further include a second roller drive unit (not shown) that tilts the second roller (TR2) in a direction perpendicular to the roll-to-roll travel direction (e.g., a first direction (DR1) or a direction opposite to the first direction (DR1)). For example, the second roller unit (RP2) may further include a second roller drive unit that tilts the second roller (TR2) in the first direction (DR1) or a direction opposite to the first direction (DR1). For example, the second roller unit (RP2) may further include a first roller drive unit that tilts the second roller (TR2) in an up-down direction (e.g., a direction opposite to the first direction (DR1)) or a direction opposite to the direction of gravity (e.g., the first direction (DR1)). According to an embodiment, the second roller drive unit may include a servo motor. However, the present disclosure is not limited thereto.

[0048] According to an embodiment, when a plurality of second rollers (TR2) are provided, the plurality of second rollers (TR2) may be tilted by the same second roller drive unit (e.g., a servo motor). For example, a single servo motor may tilt the plurality of second rollers (TR2). However, the present disclosure is not limited thereto.

[0049] The second sensor unit (SS2) can detect the pressure applied to the second roller (TR2) by the electrode sheet (ES). Through this, the second sensor unit (SS2) can detect that the tension applied to one area and another area of ​​the electrode sheet (ES) is different. This will be described later with reference to FIGS. 2 and FIGS. 3.

[0050] According to an embodiment, when a plurality of second rollers (TR2) are provided, the second sensor unit (SS2) may be positioned adjacent to the second roller (TR2) closest to the unwinder (UW) among the second rollers (TR2). For example, when a plurality of second rollers (TR2) are provided, the second sensor unit (SS2) may detect pressure applied by the electrode sheet (ES) to the second roller (TR2) closest to the unwinder (UW) among the second rollers (TR2).

[0051] FIGS. 2 and 3 are schematic cross-sectional views for explaining a first sensor unit and a second sensor unit according to one embodiment. FIGS. 4 and 5 are schematic cross-sectional views for explaining the tilting of a first roller according to one embodiment. FIGS. 6 and 7 are schematic cross-sectional views for explaining the tilting of a second roller according to one embodiment. FIG. 2 illustrates a case where the difference between a first pressure (F1) applied to one end (A1) of a first roller (TR1) by an electrode sheet (ES) and a second pressure (F2) applied to the other end (A2) is greater than or equal to a predetermined value. FIG. 3 illustrates a case where the difference between a first pressure (F1) applied to one end (A1) of a first roller (TR1) by an electrode sheet (ES) and a second pressure (F2) applied to the other end (A2) corresponds to a predetermined value. The predetermined value may be determined by a user and may be variable. According to an embodiment, the predetermined value may be 0. According to an embodiment, the predetermined value may be smaller than the difference between the first pressure (F1) and the second pressure (F2) when the electrode sheet (ES) breaks, which is determined through experiment. However, the present disclosure is not limited thereto.

[0052] Referring to FIG. 2, the first sensor unit (SS1) may include a first sensor (RC1) and a second sensor (RC2). For example, the first sensor unit (SS1) may include a first sensor (RC1) that detects a first pressure (F1) applied to one end (A1) of the first roller (TR1) by the electrode sheet (ES), and a second sensor (RC2) that detects a second pressure (F2) applied to the other end (A2) of the second roller (TR2) by the electrode sheet (ES). The first pressure (F1) and the second pressure (F2) may be determined by the tension applied to the electrode sheet (ES). For example, the tension applied to the left area of ​​the electrode sheet (ES) shown in FIG. 2 may correspond to the first pressure (F1), and the tension applied to the right area of ​​the electrode sheet (ES) shown in FIG. 2 may correspond to the second pressure (F2). Accordingly, the roll-to-roll device (100) can measure the first pressure (F1) and the second pressure (F2) to detect that the tension applied to one region and another region of the electrode sheet (ES) is different.

[0053] The first sensor (RC1) may be configured to measure a first pressure (F1) applied to one end (A1) of the first roller (TR1) by the electrode sheet (ES). For example, the first sensor (RC1) may measure the first pressure (F1) and generate a first pressure detection signal. The second sensor (RC2) may measure a second pressure (F2) applied to the other end (A2) of the second roller (TR2) by the electrode sheet (ES). For example, the second sensor (RC2) may measure the second pressure (F2) and generate a second pressure detection signal. According to an embodiment, each of the first sensor (RC1) and the second sensor (RC2) may include a load cell. However, the present disclosure is not limited thereto.

[0054] Referring to FIGS. 2 and 3, the roll-to-roll device (100) may further include a first tilting plate (TP1) that is tilted to have a first inclination (C1) when the difference between a first pressure (F1) and a second pressure (F2) is greater than or equal to a predetermined value. The first tilting plate (TP1) may be attached to a first sensor (RC1) and a second sensor (RC2). For example, the first sensor (RC1) and the second sensor (RC2) may be placed on the first tilting plate (TP1). For example, the first sensor (RC1) and the second sensor (RC2) may be coupled (or connected) to the first tilting plate (TP1).

[0055] The first tilting plate (TP1) may be configured to tilt when the difference between the first pressure (F1) and the second pressure (F2) is greater than or equal to a predetermined value. To this end, the roll-to-roll device (100) may further include a tilting plate control unit (not shown). For example, the tilting plate control unit may determine whether the first tilting plate (TP1) tilts based on a first pressure detection signal and a second pressure detection signal. For example, when the difference between the first pressure (F1) and the second pressure (F2) is greater than or equal to a predetermined value, the tilting plate control unit may generate a first tilting plate driving signal to tilt the first tilting plate (TP1).

[0056] When the difference between the first pressure (F1) and the second pressure (F2) is greater than or equal to a predetermined value, the first tilting plate (TP1) may be tilted by the first tilting plate driving signal. For example, the first tilting plate (TP1) may be tilted in a direction toward one end (A1) or the other end (A2) of the first roller (TR1) (for example, a direction opposite to the first direction (DR1) or the first direction (DR1)). When the difference between the first pressure (F1) and the second pressure (F2) is greater than or equal to a predetermined value, the first tilting plate (TP1) may be tilted to have a first tilt (C1) until the difference between the first pressure (F1) and the second pressure (F2) corresponds to a predetermined value. For example, the first tilting plate (TP1) can be tilted by a first inclination (C1) at the position shown in FIG. 3 compared to the position shown in FIG. 2.

[0057] The first inclination (C1) above may be used to generate a first roller driving signal for tilting the first roller (TR1). For example, the first roller driving unit may tilt the first roller (TR1) by a first roller driving signal calculated based on the first inclination (C1). For example, the first roller driving unit may tilt the first roller (TR1) by a first roller driving signal that tilts the first roller (TR1) by an angle corresponding to the first inclination (C1). According to an embodiment, if a plurality of first rollers (TR1) are provided, the plurality of first rollers (TR1) may be tilted by the same angle by a single first roller driving unit. However, the present disclosure is not limited thereto.

[0058] Referring to FIGS. 4 and 5, the first roller (TR1) may be tilted so that the heights of the first end (A1) and the other end (A2) differ. For example, the first roller (TR1) may be tilted in a first direction (DR1) or in the opposite direction of the first direction (DR1) so that the upper surface of the first roller (TR1) is tilted. In FIGS. 4 and 5, the first end (A1) is shown as fixed and the height of the other end (A2) is shown as changing, but the present disclosure is not limited thereto. According to an embodiment, the other end (A2) may be fixed and the height of the first end (A1) may change. As the first roller (TR1) tilts, the difference between the first pressure (F1) applied to one end (A1) of the first roller (TR1) and the second pressure (F2) applied to the other end (A2) can be reduced until it corresponds to a predetermined value, and the tension applied to each region of the electrode sheet (ES) can be made uniform.

[0059] Referring to FIGS. 2 and FIGS. 3, the second sensor unit (SS2) can be configured similarly to the first sensor unit (SS1).

[0060] The second sensor unit (SS2) may include a third sensor (RC3) and a fourth sensor (RC4). For example, the second sensor unit (SS2) may include a third sensor (RC3) that detects a third pressure (F3) applied to one end (A3) of the second roller (TR2) by the electrode sheet (ES), and a fourth sensor (RC4) that detects a fourth pressure (F4) applied to the other end (A4) of the second roller (TR2) by the electrode sheet (ES). The third pressure (F3) and the fourth pressure (F4) may be determined by the tension applied to the electrode sheet (ES). For example, the tension applied to the left area of ​​the electrode sheet (ES) shown in FIG. 2 may correspond to the third pressure (F3), and the tension applied to the right area of ​​the electrode sheet (ES) shown in FIG. 2 may correspond to the fourth pressure (F4). Accordingly, the roll-to-roll device (100) can measure the third pressure (F3) and the fourth pressure (F4) to detect that the tension applied to one region and another region of the electrode sheet (ES) is different.

[0061] The third sensor (RC3) may be configured to measure a third pressure (F3) applied to one end (A3) of the second roller (TR2) by the electrode sheet (ES). For example, the third sensor (RC3) may measure the third pressure (F3) and generate a third pressure detection signal. The fourth sensor (RC4) may measure a fourth pressure (F4) applied to the other end (A4) of the second roller (TR2) by the electrode sheet (ES). For example, the fourth sensor (RC4) may measure the fourth pressure (F4) and generate a fourth pressure detection signal. According to an embodiment, each of the third sensor (RC3) and the fourth sensor (RC4) may include a load cell. However, the present disclosure is not limited thereto.

[0062] The roll-to-roll device (100) may further include a second tilting plate (TP2) that is tilted to have a second inclination (C2) when the difference between the third pressure (F3) and the fourth pressure (F4) is greater than or equal to a predetermined value. The second tilting plate (TP2) may be attached to the third sensor (RC3) and the fourth sensor (RC4). For example, the third sensor (RC3) and the fourth sensor (RC4) may be placed on the second tilting plate (TP2). For example, the third sensor (RC3) and the fourth sensor (RC4) may be coupled (or connected) to the second tilting plate (TP2).

[0063] The second tilting plate (TP2) may be configured to tilt when the difference between the third pressure (F3) and the fourth pressure (F4) is greater than or equal to a predetermined value. To this end, the roll-to-roll device (100) may further include a tilting plate control unit (not shown). For example, the tilting plate control unit may determine whether to tilt the second tilting plate (TP2) based on the third pressure detection signal and the fourth pressure detection signal. When the difference between the third pressure (F3) and the fourth pressure (F4) is greater than or equal to a predetermined value, the tilting plate control unit may generate a second tilting plate driving signal to tilt the second tilting plate (TP2). According to an embodiment, the tilting plate control unit for tilting the first tilting plate (TP1) may be composed of a single control unit identical to the tilting plate control unit for tilting the second tilting plate (TP2), but the present disclosure is not limited thereto. For example, the tilting plate control unit for tilting the first tilting plate (TP1) and the tilting plate control unit for tilting the second tilting plate (TP2) may be configured as separate control units.

[0064] When the difference between the third pressure (F3) and the fourth pressure (F4) is greater than or equal to a predetermined value, the second tilting plate (TP2) may be tilted by the second tilting plate driving signal. For example, the second tilting plate (TP2) may be tilted in a direction toward one end (A3) or the other end (A4) of the second roller (TR2) (for example, in the first direction (DR1) or in a direction opposite to the first direction (DR1)). When the difference between the third pressure (F3) and the fourth pressure (F4) is greater than or equal to a predetermined value, the second tilting plate (TP2) may be tilted to have a second tilt (C2) until the difference between the third pressure (F3) and the fourth pressure (F4) corresponds to a predetermined value. For example, the second tilting plate (TP2) can be tilted by a second inclination (C2) at the position shown in FIG. 3 compared to the position shown in FIG. 2.

[0065] The second inclination (C2) above may be used to generate a second roller driving signal for tilting the second roller (TR2). For example, the second roller driving unit may tilt the second roller (TR2) by a second roller driving signal calculated based on the second inclination (C2). For example, the second roller driving unit may tilt the second roller (TR2) by a second roller driving signal that tilts the second roller (TR2) by an angle corresponding to the second inclination (C2). According to an embodiment, if a plurality of second rollers (TR2) are provided, the plurality of second rollers (TR2) may be tilted by the same angle by a single second roller driving unit. However, the present disclosure is not limited thereto.

[0066] Referring to FIGS. 5 and 6, the second roller (TR2) may be tilted so that the heights of the first end (A3) and the other end (A4) differ. For example, the second roller (TR2) may be tilted in the first direction (DR1) or in the opposite direction of the first direction (DR1) so that the upper surface of the second roller (TR2) is tilted. In FIGS. 5 and 6, the first end (A3) is shown as fixed and the height of the other end (A4) is shown as changing, but the present disclosure is not limited thereto. According to an embodiment, the other end (A4) may be fixed and the height of the first end (A3) may change. As the second roller (TR2) tilts, the difference between the third pressure (F3) applied to one end (A3) of the second roller (TR2) and the fourth pressure (F4) applied to the other end (A4) can be reduced until it corresponds to a predetermined value, and the tension applied to each region of the electrode sheet (ES) can be made uniform.

[0067] When ripples occur on the electrode sheet (ES), and the electrode sheet (ES) comes into contact with a roller (e.g., a first roller (TR1) or a second roller (TR2)), the area in contact with the roller may differ depending on the region of the electrode sheet (ES). For example, when ripples occur on the electrode sheet (ES), the area in contact with the roller of the first region of the electrode sheet (ES) having relatively small elongation (e.g., the foil portion of the electrode sheet (ES)) may be larger than the area in contact with the roller of the second region of the electrode sheet (ES) having relatively large elongation (e.g., the slitting portion of the electrode sheet (ES)). In this way, when the area in contact with the roller differs depending on the region of the electrode sheet (ES), the tension applied to each region of the electrode sheet (ES) may differ. In this case, the tension applied to each region of the electrode sheet (ES) is uneven, and the electrode sheet (ES) may break.

[0068] Meanwhile, the roll-to-roll device (100) according to the present disclosure can eliminate unevenness in the tension applied to each region of the electrode sheet (ES) by tilting the first roller (TR1) and the second roller (TR2). Accordingly, the risk of the electrode sheet (ES) breaking can be reduced.

[0069] FIG. 8 is a schematic cross-sectional view illustrating a roll-to-roll device according to another embodiment. The embodiment illustrated in FIG. 8 differs from the embodiment illustrated in FIG. 1a in that it further includes a third roller section (RP3). In the following, descriptions that overlap with the previously mentioned content will be brief or omitted.

[0070] Referring to FIG. 8, a roll-to-roll device (100') according to one embodiment may include an unwinder (UW) for unwinding an electrode sheet (ES) for roll-to-roll travel, a rewinder (RW) spaced apart from the unwinder (UW) for winding the electrode sheet (ES), a first roller section (RP1) and a second roller section (RP2) positioned between the unwinder (UW) and the rewinder (RW) for supporting the electrode sheet (ES) during roll-to-roll travel, and a third roller section (RP3) positioned between the first roller section (RP1) and the second roller section (RP2).

[0071] The third roller section (RP3) supports the electrode sheet (ES) and can move the electrode sheet (ES) between the unwinder (UW) and the rewinder (RW). For example, the electrode sheet (ES) can be unwound from the unwinder (UW), run roll-to-roll by the first roller section (RP1), the second roller section (RP2), and the third roller section (RP3), and wound in the rewinder (RW).

[0072] The third roller section (RP3) may include a third roller (TR3) that supports the electrode sheet (ES), a third plate (PL3) configured to move while supporting the third roller (TR3), and a third sensor section (SS3) that detects pressure applied to the third roller (TR3) by the electrode sheet (ES).

[0073] The third roller (TR3) may be configured to rotate. For example, the third roller (TR3) may be configured to rotate about one axis. The third roller (TR3) may be configured to contact the electrode sheet (ES). By the rotation and contact of the third roller (TR3), the electrode sheet (ES) may move between the unwinder (UW) and the rewinder (RW).

[0074] According to an embodiment, a plurality of third rollers (TR3) may be provided. A plurality of third rollers (TR3) may be spaced apart in a second direction (DR2). According to an embodiment, a plurality of third rollers (TR3) may include first row rollers (BTR1) arranged side by side in the second direction (DR2) and second row rollers (BTR2) spaced apart from the first row rollers (BTR1) in the direction opposite to the first direction (DR1) and arranged side by side in the second direction (DR2). However, the present disclosure is not limited thereto, and a plurality of third rollers (TR3) may be arranged in the second direction (DR2) along a single row. The first row rollers (BTR1) and the second row rollers (BTR2) may be arranged alternately. For example, the first row rollers (BTR1) and the second row rollers (BTR2) may be arranged alternately along the first direction (DR1) and the opposite direction of the first direction (DR1).

[0075] The third roller (TR3) may be configured (or driven) to tilt relative to the third plate (PL3). The third roller (TR3) may be configured to tilt relative to the third plate (PL3) when the tension applied to one region (e.g., one end) and the other region (e.g., the other end) of the electrode sheet (ES) are different from each other. The third roller (TR3) may be configured to tilt relative to the third plate (PL3) in a second direction (DR2) that is different from the first direction (DR1) or in a direction opposite to the second direction (DR2). For example, the third roller (TR3) may be configured to tilt relative to the third plate (PL3) in a left-right direction (e.g., a direction perpendicular to the direction of gravity).

[0076] The third roller unit (RP3) may further include a third roller drive unit (not shown) for tilting the third roller (TR3). For example, the third roller unit (RP3) may further include a third roller drive unit for tilting the third roller (TR3) in a second direction (DR2) or in a direction opposite to the second direction (DR2). For example, the third roller unit (RP3) may further include a third roller drive unit for tilting the third roller (TR3) in a left-right direction (e.g., a direction perpendicular to the direction of gravity) (e.g., a direction opposite to the second direction (DR2) or the second direction (DR2)). According to an embodiment, the third roller drive unit may include a servo motor. However, the present disclosure is not limited thereto.

[0077] According to an embodiment, when a plurality of third rollers (TR3) are provided, the plurality of third rollers (TR3) may be tilted by the same third roller drive unit (e.g., a servo motor). For example, a single servo motor may tilt the plurality of third rollers (TR3). However, the present disclosure is not limited thereto.

[0078] The third sensor unit (SS3) can detect the pressure applied to the third roller (TR3) by the electrode sheet (ES). Through this, the third sensor unit (SS3) can detect that the tension applied to one area and another area of ​​the electrode sheet (ES) is different. This will be described later with reference to FIGS. 9 and FIGS. 10.

[0079] According to an embodiment, when a plurality of third rollers (TR3) are provided, the third sensor unit (SS3) may be positioned adjacent to the third roller (TR3) closest to the unwinder (UW) among the third rollers (TR3). For example, when a plurality of third rollers (TR3) are provided, the third sensor unit (SS3) may detect pressure applied by the electrode sheet (ES) to the third roller (TR3) closest to the unwinder (UW) among the third rollers (TR3).

[0080] FIGS. 9 and FIGS. 10 are schematic cross-sectional views illustrating a third sensor unit according to one embodiment. FIG. 9 illustrates a case where the difference between a fifth pressure (F5) applied to one end (A5) of a third roller (TR3) by an electrode sheet (ES) and a sixth pressure (F6) applied to the other end (A6) is greater than or equal to a predetermined value. FIG. 10 illustrates a case where the difference between a fifth pressure (F5) applied to one end (A5) of a third roller (TR3) by an electrode sheet (ES) and a sixth pressure (F6) applied to the other end (A6) corresponds to a predetermined value. The predetermined value may be determined by a user and may be variable. According to an embodiment, the predetermined value may be 0. However, the present disclosure is not limited thereto.

[0081] Referring to FIGS. 9 and 10, the third sensor unit (SS3) may include a fifth sensor (RC5) and a sixth sensor (RC6). For example, the third sensor unit (SS3) may include a fifth sensor (RC5) that detects a fifth pressure (F5) applied to one end (A5) of the third roller (TR3) by the electrode sheet (ES), and a sixth sensor (RC6) that detects a sixth pressure (F6) applied to the other end (A6) of the third roller (TR3) by the electrode sheet (ES). The fifth pressure (F5) and the sixth pressure (F6) may be determined by the tension applied to the electrode sheet (ES). For example, the tension applied to the right side of the electrode sheet (ES) shown in FIG. 9 may correspond to the fifth pressure (F5), and the tension applied to the left side of the electrode sheet (ES) shown in FIG. 9 may correspond to the sixth pressure (F6). Accordingly, the roll-to-roll device (100') can measure the fifth pressure (F5) and the sixth pressure (F6) to detect that the tension applied to one region and another region of the electrode sheet (ES) is different.

[0082] The fifth sensor (RC5) may be configured to measure a fifth pressure (F5) applied to one end (A5) of the third roller (TR3) by the electrode sheet (ES). For example, the fifth sensor (RC5) may measure the fifth pressure (F5) and generate a fifth pressure detection signal. The sixth sensor (RC6) may measure a sixth pressure (F6) applied to the other end (A6) of the third roller (TR3) by the electrode sheet (ES). For example, the sixth sensor (RC6) may measure the sixth pressure (F6) and generate a sixth pressure detection signal. According to an embodiment, each of the fifth sensor (RC5) and the sixth sensor (RC6) may include a load cell. However, the present disclosure is not limited thereto.

[0083] The roll-to-roll device (100') may further include a third tilting plate (TP3) that is tilted to have a third inclination (C3) when the difference between the fifth pressure (F5) and the sixth pressure (F6) is greater than or equal to a predetermined value. The third tilting plate (TP3) may be attached to the fifth sensor (RC5) and the sixth sensor (RC6). For example, the fifth sensor (RC5) and the sixth sensor (RC6) may be placed on the third tilting plate (TP3). For example, the fifth sensor (RC5) and the sixth sensor (RC6) may be coupled (or connected) to the third tilting plate (TP3).

[0084] The third tilting plate (TP3) may be configured to tilt when the difference between the fifth pressure (F5) and the sixth pressure (F6) is greater than or equal to a predetermined value. To this end, the roll-to-roll device (100') may further include a tilting plate control unit (not shown). For example, the tilting plate control unit may determine whether to tilt the third tilting plate (TP3) based on the fifth pressure detection signal and the sixth pressure detection signal. When the difference between the fifth pressure (F5) and the sixth pressure (F6) is greater than or equal to a predetermined value, the tilting plate control unit may generate a third tilting plate driving signal to tilt the third tilting plate (TP3). According to an embodiment, the tilting plate control unit for tilting the third tilting plate (TP3) may be composed of a single control unit identical to at least one of the tilting plate control units for tilting the first tilting plate (TP1) and the second tilting plate (TP2), but the present disclosure is not limited thereto. For example, the tilting plate control unit for tilting the third tilting plate (TP3) and the tilting plate control unit for tilting the first tilting plate (TP1) and the second tilting plate (TP2) may be composed of separate control units.

[0085] When the difference between the fifth pressure (F5) and the sixth pressure (F6) is greater than or equal to a predetermined value, the third tilting plate (TP3) may be tilted by the third tilting plate driving signal. For example, the third tilting plate (TP3) may be tilted in a direction toward one end (A5) or the other end (A6) of the third roller (TR3) (for example, the second direction (DR2) or a direction opposite to the second direction (DR2). When the difference between the fifth pressure (F5) and the sixth pressure (F6) is greater than or equal to a predetermined value, the third tilting plate (TP3) may be tilted to have a third tilt (C3) until the difference between the fifth pressure (F5) and the sixth pressure (F6) corresponds to a predetermined value. For example, the third tilting plate (TP3) can be tilted by a third inclination (C3) at the position shown in FIG. 10 compared to the position shown in FIG. 9.

[0086] The third inclination (C3) can be used to generate a third roller driving signal for tilting the third roller (TR3). For example, the third roller driving unit can tilt the third roller (TR3) by a third roller driving signal calculated based on the third inclination (C3). For example, the third roller driving unit can tilt the third roller (TR3) by a third roller driving signal that tilts the third roller (TR3) by an angle corresponding to the third inclination (C3). According to an embodiment, if a plurality of third rollers (TR3) are provided, the plurality of third rollers (TR3) can be tilted by the same angle by a single third roller driving unit.

[0087] FIGS. 11 and 12 are schematic cross-sectional views illustrating the tilting of the third roller and the movement of the third plate according to one embodiment. FIG. 11 shows the third roller (TR3) tilted in the second direction (DR2). FIG. 12 shows the third roller (TR3) tilted in the opposite direction to the second direction (DR2).

[0088] Referring to FIGS. 11 and 12, the third roller (TR3) may be tilted in the second direction (DR2) or in the opposite direction of the second direction (DR2) so that the side of the third roller (TR3) is tilted. For example, the side of the third roller (TR3) may be tilted relative to the third plate (PL3). As the third roller (TR3) is tilted, the difference between the fifth pressure (F5) applied to one end (A5) of the third roller (TR3) and the sixth pressure (F6) applied to the other end (A6) may be reduced until it corresponds to a predetermined value, and the tension applied to each region of the electrode sheet (ES) may become uniform.

[0089] The third plate (PL3) may be configured to move when the third roller (TR3) is tilted. The third plate (PL3) may be configured to support the third roller (TR3) and be movable. To this end, according to an embodiment, the roll-to-roll device (100') may include a plate drive unit for moving the third plate (PL3). As the third plate (PL3) moves, the third roller (TR3) may move together with the third plate (PL3). For example, the third roller (TR3) may be coupled to the third plate (PL3) and move together with the third plate (PL3).

[0090] The direction of movement (PDR) of the third plate (PL3) and the direction of inclination (RDR) of the third roller (TR3) may be different. For example, the direction of movement (PDR) of the third plate (PL3) and the direction of inclination (RDR) of the third roller (TR3) may be opposite to each other. For example, if the third roller (TR3) is inclined toward the second direction (DR2), the third plate (PL3) may move in the opposite direction of the second direction (DR2), and if the third roller (TR3) is inclined toward the opposite direction of the second direction (DR2), the third plate (PL3) may move toward the second direction (DR2). Accordingly, the third roller (TR3) can apply uniform tension to each region of the electrode sheet (ES) while applying appropriate pressure to the electrode sheet (ES). This will be explained with reference to FIGS. 13a and FIGS. 13b.

[0091] FIGS. 13a and FIGS. 13b are diagrams for schematically illustrating the relationship between the movement of a third plate and the pressure applied to the electrode according to one embodiment. FIG. 13b illustrates region AA of FIG. 13a.

[0092] Referring to FIG. 13a, the electrode sheet (ES) may include a first part (EP1) located on one side (e.g., left) of one third roller (TR3) and a second part (EP2) located on the other side (e.g., right) of one third roller (TR3).

[0093] For example, if pressure must be applied in the opposite direction to the second direction (DR2) to the first part (EP1) and the second part (EP2) of the electrode sheet (ES) so that the electrode sheet (ES) is properly wound, and the third roller (TR3) is tilted toward the second direction (DR2) and the third plate (PL3) does not move (for example, if the third plate (PL3) is fixed), there is a risk that the third roller (TR3) will tilt and apply unintended pressure toward the second direction (DR2) while in contact with the second part (EP2) of the third roller (TR3).

[0094] On the other hand, according to a roll-to-roll device (100') according to one embodiment, the third plate (PL3) moves in a direction opposite to the direction (RDR) in which the third roller (TR3) is tilted, thereby reducing the risk of applying pressure to an unintended area of ​​the electrode (EP). For example, when the third roller (TR3) is tilted in the second direction (DR2), the third plate (PL3) moves in a direction opposite to the second direction (DR2), so that pressure is not applied in the second direction (DR2) to the second part (EP2) of the third roller (TR3). That is, referring to FIG. 13b, as the third plate (PL3) moves, the third roller (TR3) can apply pressure to the electrode sheet (ES) while properly pressing the electrode sheet (ES). Accordingly, the electrode sheet (ES) can be properly wound, and the reliability of the winding process can be increased.

[0095] FIG. 14 is a schematic cross-sectional view illustrating a roll-to-roll device according to another embodiment. The embodiment illustrated in FIG. 14 differs from the embodiment illustrated in FIG. 8 in that at least one of the first roller (TR1') and the second roller (TR2') is not tilted. In the following, descriptions that overlap with the previously mentioned content will be brief or omitted.

[0096] At least one of the first roller (TR1') and the second roller (TR2') of the roll-to-roll device (100”) according to one embodiment may not be tilted. For example, according to the roll-to-roll device (100”) according to one embodiment, the first roller (TR1') may be configured to be tilted with respect to the first plate (PL1), the second roller (TR2') may be configured to be tilted with respect to the second plate (PL2), or the first roller (TR1') and the second roller (TR2') may be configured not to be tilted with respect to the first plate (PL1) and the second plate (PL2), respectively.

[0097] According to an embodiment, the first roller (TR1') may be configured to be tilted with respect to the first plate (PL1), or the second roller (TR2') may be configured not to be tilted with respect to the second plate (PL2). For example, the first roller (TR1') may be tilted with respect to the first plate (PL1), and the second roller (TR2') may not be tilted with respect to the second plate (PL2). For example, the first roller (TR1') may be configured to be tilted with respect to the first plate (PL1), and the second roller (TR2') may be configured to be fixed with respect to the second plate (PL2).

[0098] According to an embodiment, the first roller (TR1') may be configured not to tilt with respect to the first plate (PL1), or the second roller (TR2') may be configured to tilt with respect to the second plate (PL2). For example, the first roller (TR1') may not tilt with respect to the first plate (PL1), and the second roller (TR2') may tilt with respect to the second plate (PL2). For example, the first roller (TR1') may be configured to be fixed with respect to the first plate (PL1), and the second roller (TR2') may be configured to tilt with respect to the second plate (PL2).

[0099] According to an embodiment, the first roller (TR1') may be configured not to tilt with respect to the first plate (PL1), and the second roller (TR2') may be configured not to tilt with respect to the second plate (PL2). For example, the first roller (TR1') may not tilt with respect to the first plate (PL1), and the second roller (TR2') may not tilt with respect to the second plate (PL2). For example, the first roller (TR1') may be configured to be fixed with respect to the first plate (PL1), and the second roller (TR2') may be configured to be fixed with respect to the second plate (PL2).

[0100] With reference to the foregoing descriptions, those skilled in the art to which the present invention pertains will understand that the present disclosure may be implemented in other specific forms without altering the technical concept or essential features thereof.

[0101] The scope of the present disclosure is defined by the claims set forth below rather than by the foregoing detailed description, and all modifications or variations derived from the meaning and scope of the claims and equivalent concepts should be interpreted as being included within the scope of the present invention. Explanation of the symbols

[0102] 100, 100', 100”: Roll-to-roll device UW: Unwinder RW: Rewinder ES: Electrode sheet RP1: 1st roller section TR1, TR1': 1st roller SS1: 1st sensor unit PL1: First plate RP2: Second roller section TR2, TR2': Second roller SS2: 2nd sensor unit PL2: Second plate RP3: Third roller section TR3: Third roller SS3: Third sensor unit PL3: Third plate RC1: 1st sensor RC2: 2nd sensor RC3: Third sensor RC4: 4th sensor TP1: 1st tilting plate TP2: Second tilting plate TP3: Third tilting plate C1: First slope C2: Second slope C3: Third slope BTR1: 1st row rollers BTR2: 2nd row rollers

Claims

Claim 1 A roll-to-roll device comprising: an unwinder for unwinding an electrode sheet for roll-to-roll travel; a rewinder spaced apart from the unwinder and winding the electrode sheet; and a first roller section and a second roller section spaced between the unwinder and the rewinder and supporting the electrode sheet during roll-to-roll travel; wherein the first roller section and the second roller section face each other, the first roller section includes a first roller supporting the electrode sheet; and a first plate supporting the first roller, and the second roller section includes a second roller supporting the electrode sheet; and a second plate supporting the second roller, wherein the first roller is configured to be tilted with respect to the first plate, the second roller is configured to be tilted with respect to the second plate, or the first roller and the second roller are configured to be tilted simultaneously with respect to the first plate and the second plate, respectively. Claim 2 A roll-to-roll device according to claim 1, wherein the first roller part further includes a first roller driving part that tilts the first roller in a direction perpendicular to the roll-to-roll driving direction, and the second roller part further includes a second roller driving part that tilts the second roller in a direction perpendicular to the roll-to-roll driving direction. Claim 3 In claim 2, further comprising: a first sensor unit for detecting pressure applied to the first roller by the electrode sheet; and a second sensor unit for detecting pressure applied to the second roller by the electrode sheet, wherein the first sensor unit, A first sensor for detecting a first pressure applied to one end of the first roller by the electrode sheet; and It includes a second sensor that detects a second pressure applied to the other end of the first roller by the electrode sheet, and the second sensor part comprises: A third sensor for detecting a third pressure applied to one end of the second roller by the electrode sheet; and A roll-to-roll device comprising a fourth sensor that detects a fourth pressure applied to the other end of the second roller by the electrode sheet. Claim 4 A roll-to-roll device according to claim 3, further comprising: a first tilting plate that tilts to have a first inclination when the difference between the first pressure and the second pressure is greater than or equal to a predetermined value; and a second tilting plate that tilts to have a second inclination when the difference between the third pressure and the fourth pressure is greater than or equal to a predetermined value. Claim 5 A roll-to-roll device according to claim 4, wherein the first roller drive unit tilts the first roller by a first drive signal calculated based on the first inclination, and the second roller drive unit tilts the second roller by a second drive signal calculated based on the second inclination. Claim 6 In claim 1, the invention further comprises a third roller portion disposed between the first roller portion and the second roller portion, wherein the third roller portion is A third roller supporting the electrode sheet; A third plate configured to support the third roller and be movable; and A roll-to-roll device comprising a third roller driving unit for tilting the third roller, wherein the third roller is configured to be tilted relative to the third plate. Claim 7 A roll-to-roll device according to claim 6, wherein each of the first roller and the second roller is configured to be inclined in a first direction or in a direction opposite to the first direction with respect to the first plate and the second plate, and the third roller is configured to be inclined in a second direction different from the first direction or in a direction opposite to the second direction with respect to the third plate. Claim 8 A roll-to-roll device according to claim 7, wherein the direction in which the third plate moves and the direction in which the third roller tilts are opposite to each other. Claim 9 In claim 8, the invention further comprises a third sensor unit for detecting pressure applied to the third roller by the electrode sheet, and the third sensor unit, A fifth sensor for detecting a fifth pressure acting on one end of the third roller by the electrode sheet; and A roll-to-roll device comprising a sixth sensor that detects a sixth pressure acting on the other end of the third roller by the electrode sheet. Claim 10 An unwinder for unwinding an electrode sheet for roll-to-roll travel; a rewinder spaced apart from the unwinder and winding the electrode sheet; and first to third roller sections spaced between the unwinder and the rewinder and supporting the electrode sheet during roll-to-roll travel; wherein the first roller section and the second roller section face each other, the third roller section is spaced between the first roller section and the second roller section, and the first roller section is A first roller supporting the electrode sheet; and The first plate supporting the first roller, and the second roller part, A second roller supporting the electrode sheet; and The second plate supporting the second roller, and the third roller part, A third roller supporting the electrode sheet; and A roll-to-roll device comprising a third plate configured to support and move the third roller, wherein the first roller is configured not to tilt relative to the first plate, the second roller is configured not to tilt relative to the second plate, and the third roller is configured to tilt relative to the third plate.

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