Separator running apparatus

Abstract

The present invention provides a separator running apparatus comprising: a sheet roll around which is wound a sheet having a protection film formed from a synthetic resin material attached to a first surface of a separator; a separation roll by which the sheet, unwound from the sheet roll, is separated into the separator and the sheet while continuously running; a recovery roll around which the protection film, separated from the sheet by passing through the separation roll, is wound and recovered; and nip rolls which supply the separator, separated from the sheet by passing through the separation roll, to a stack table, wherein a separator of the separator and the protection film is 45 degrees or greater.

Description

Membrane driving device

[0001] This application claims the benefit of priority to Korean Patent Application No. 10-2024-0081939, dated June 24, 2024, and Korean Patent Application No. 10-2024-0125991, dated September 13, 2024, the entire contents of which are incorporated herein by reference.

[0002] The present invention relates to a membrane driving device configured to separate a protective film attached to a membrane sheet.

[0003] Secondary batteries, which boast high electrical properties such as high energy density and easy applicability across a wide range of product groups, are widely used not only in portable devices but also in electric or hybrid vehicles powered by electrical power sources, as well as in power storage devices. These batteries are attracting attention as a new energy source for environmental friendliness and energy efficiency, not only because they can dramatically reduce fossil fuel use, but also because they produce no byproducts from energy use.

[0004] While small mobile devices typically use one or two or three battery cells per device, medium- to large-sized devices, such as automobiles, require high output and large capacity. Therefore, medium- to large-sized battery modules or packs consisting of multiple battery cells electrically connected are used.

[0005] Meanwhile, known types of unit secondary battery cells include cylindrical, prismatic, and pouch-shaped battery cells. Since it is desirable for mid- to large-sized battery modules to be manufactured with as small a size and weight as possible, prismatic and pouch-shaped batteries, which can be stacked with high integration and have a small weight per capacity, are primarily used as battery cells for mid- to large-sized battery modules.

[0006] Among these, pouch-type battery cells have various structures depending on the manufacturing method of the electrode assembly they contain. In particular, recently, high-capacity stacked cell type electrode assemblies are often manufactured at high speed using the zigzag stacking method, which alternately laminates positive and negative electrodes between each layer of a zigzag-folded separator.

[0007] Figure 1 illustrates a conventional membrane driving device. Referring to this, when manufacturing an electrode assembly using a zigzag stacking method, a membrane (11) continuously supplied through a nip roll (4) is folded in a zigzag pattern on a stack table (ST) and stacked together with an electrode to form an electrode assembly (EA).

[0008] At this time, the separator (11) is wound in the form of a sheet (10) with a protective film (12) attached thereto to form a sheet roll (1), and as it is unwound, it passes through the separation roll (2) and is supplied to the stack table (ST) in a separated state with the protective film (12). At this time, the separated protective film (12) is wound again on the recovery roll (3) and recovered.

[0009] Fig. 2 is an enlarged view of the main part of Fig. 1. Referring to this, when the separator (11) and the protective film (12) are separated, electrostatic attraction or adhesive force is applied between the separator (11) and the protective film (12). Accordingly, the separator (11) and the protective film (12) cannot travel in a straight line from the separation roll (2) to the next roller, which results in the tension of each of the separator (11) and the protective film (12) not being maintained constant.

[0010] In order to ensure that the supply of the separator (11) and the recovery of the protective film (12) are performed normally, the tension applied to the separator (11) and the protective film (12) must be maintained constant. Therefore, excessive attractive force between the separator (11) and the protective film (12) may destabilize the tension of each of the separator (11) and the protective film (12), thereby posing a risk of causing defects in the supply of the separator (11) and the recovery of the protective film (12).

[0011] Secondary batteries, which boast high electrical properties such as high energy density and easy applicability across a wide range of product groups, are widely used not only in portable devices but also in electric or hybrid vehicles powered by electrical power sources, as well as in power storage devices. These batteries are attracting attention as a new energy source for environmental friendliness and energy efficiency, not only because they can dramatically reduce fossil fuel use, but also because they produce no byproducts from energy use.

[0012] While small mobile devices typically use one or two or three battery cells per device, medium- to large-sized devices, such as automobiles, require high output and large capacity. Therefore, medium- to large-sized battery modules or packs consisting of multiple battery cells electrically connected are used.

[0013] Meanwhile, known types of unit secondary battery cells include cylindrical, prismatic, and pouch-shaped battery cells. Since it is desirable for mid- to large-sized battery modules to be manufactured with as small a size and weight as possible, prismatic and pouch-shaped batteries, which can be stacked with high integration and have a small weight per capacity, are primarily used as battery cells for mid- to large-sized battery modules.

[0014] Among these, pouch-type battery cells have various structures depending on the manufacturing method of the electrode assembly they contain. In particular, recently, high-capacity stacked cell type electrode assemblies are often manufactured at high speed using the zigzag stacking method, which alternately laminates positive and negative electrodes between each layer of a zigzag-folded separator.

[0015] Figure 1 illustrates a conventional membrane driving device. Referring to this, when manufacturing an electrode assembly using a zigzag stacking method, a membrane (11) continuously supplied through a nip roll (4) is folded in a zigzag pattern on a stack table (ST) and stacked together with an electrode to form an electrode assembly (EA).

[0016] At this time, the separator (11) is wound in the form of a sheet (10) with a protective film (12) attached thereto to form a sheet roll (1), and as it is unwound, it passes through the separation roll (2) and is supplied to the stack table (ST) in a separated state with the protective film (12). At this time, the separated protective film (12) is wound again on the recovery roll (3) and recovered.

[0017] Fig. 2 is an enlarged view of the main part of Fig. 1. Referring to this, when the separator (11) and the protective film (12) are separated, electrostatic attraction or adhesive force is applied between the separator (11) and the protective film (12). Accordingly, the separator (11) and the protective film (12) cannot travel in a straight line from the separation roll (2) to the next roller, which results in the tension of each of the separator (11) and the protective film (12) not being maintained constant.

[0018] In order to ensure that the supply of the separator (11) and the recovery of the protective film (12) are performed normally, the tension applied to the separator (11) and the protective film (12) must be maintained constant. Therefore, excessive attractive force between the separator (11) and the protective film (12) may destabilize the tension of each of the separator (11) and the protective film (12), thereby posing a risk of causing defects in the supply of the separator (11) and the recovery of the protective film (12).

[0019] In order to solve the above problem, the present invention provides a structure of a separation membrane travel device including: a sheet roll on which a sheet having a synthetic resin protective film attached to a first surface of a separation membrane is wound; a separation roll on which the sheet unwound from the sheet roll continuously travels and is separated from the separation membrane; a recovery roll on which the protective film separated from the sheet while passing through the separation roll is wound and recovered; and a nip roll for supplying the separation membrane separated from the sheet while passing through the separation roll to a stack table; wherein when the traveling direction of the sheet immediately before passing through the separation roll is referred to as a first direction, the traveling direction of the protective film immediately after passing through the separation roll is referred to as a second direction, and the traveling direction of the separation membrane immediately after passing through the separation roll is referred to as a third direction, a separation angle, which is an angle formed by the second direction and the third direction, is 45 degrees or more.

[0020] According to the present invention, when the separation angle is 45 degrees or more, the separator and the protective film separated from the sheet can quickly move apart, and the change and instability of the tension of each of the separator and the protective film due to the electrostatic attraction between them can be significantly reduced.

[0021] The sheet may be configured such that the protective film is attached to the first surface of the separator. More specifically, the sheet may be configured such that the separator and the protective film are attached to each other such that the second surface of the protective film is in contact with the first surface of the separator, so that the second surface of the separator and the first surface of the protective film become their opposite surfaces.

[0022] According to the first embodiment, the separation angle may be 90 degrees or more. In this case, it was confirmed that the change in tension due to electrostatic attraction between the separation membrane and the protective film is reduced to a negligible level.

[0023] The above protective film may pass through a first dancer roll between the separation roll and the recovery roll. At this time, the first dancer roll may move in response to changes in tension applied to the protective film, thereby acting as a damper to prevent the tension applied to the protective film from changing abruptly, or may help maintain the tension applied to the protective film at a constant level.

[0024] The separator may pass through a second dancer roll between the separator roll and the nip roll. At this time, the second dancer roll may move in response to changes in tension applied to the separator, thereby acting as a damper to prevent the tension applied to the separator from changing abruptly, or may help maintain the tension applied to the separator at a constant level.

[0025] According to the first embodiment, the separation roll may be arranged to be in contact with the first surface of the protective film. At this time, the separation angle may be less than or equal to a first angle formed by the first direction and the second direction. That is, in this case, the separation membrane and the protective film may be separated from each other by a difference in the angle at which they are bent with respect to the first direction while passing through the separation roll, and the difference in the angle may form the separation angle.

[0026] According to the first embodiment, the separation angle may be equal to the first angle. In other words, this means that the protective film travels in a direction bent relative to the first direction while passing the separation roll, and the separation membrane does not bend in its traveling direction while passing the separation roll, so that the separation angle formed between the separation membrane and the protective film is formed by the angle at which the protective film is bent while passing the separation roll.

[0027] According to the second embodiment, the second angle formed by the first direction and the third direction may have the same direction as the first angle. That is, the separator and the protective film may be bent in the same direction while passing through the separating roll. At this time, the separation angle may be smaller than the first angle. Alternatively, the separation angle may be formed based on the difference between the first angle and the second angle.

[0028] In this case, unlike the case where the separator does not bend as it passes over the separation roll, since both the separator and the protective film receive tension from the separation roll, the tension of the separator can be more stable. That is, in this case, the support interval between the running of the separator can be shortened, thereby preventing sagging of the separator between the supports.

[0029] According to one variation, the separation structure of the separator and the protective film can be equally applied even when the separator and the protective film are subjected to the opposite action of the separation roll.

[0030] For example, according to the above-described modified example, the separation roll may be arranged to be in contact with the second surface of the separation membrane. At this time, the separation angle may be less than or equal to a third angle formed by the first direction and the third direction. That is, in this case, the separation membrane and the protective film are separated from each other by the difference in the angle at which they are bent with respect to the first direction while passing through the separation roll, and the difference in the angle may form the separation angle.

[0031] At this time, the separation angle may be equal to the third angle. In other words, this means that the separation membrane travels in a direction bent relative to the first direction while passing the separation roll, and the protective film does not travel in a direction bent while passing the separation roll, so that the separation angle formed between the separation membrane and the protective film is formed as an angle equal to the angle at which the separation membrane travels while passing the separation roll.

[0032] Alternatively, the fourth angle formed by the first direction and the second direction may have the same direction as the third angle. That is, the separator and the protective film may be bent in the same direction while passing through the separation roll. In this case, the separation angle may be smaller than the third angle. Alternatively, the separation angle may be formed based on the difference between the third angle and the fourth angle.

[0033] According to a third embodiment, the separation roll may include a first separation roll in contact with the first side of the protective film and a second separation roll in contact with the second side of the separator. That is, the separation rolls may be provided as a pair, each in contact with both sides of the sheet. At this time, the first direction and the second direction may form a fifth angle, and the first direction and the third direction may form a sixth angle that is opposite to the fifth angle. That is, in this case, the separation film and the protective film may be bent in opposite directions while passing through the separation roll. Accordingly, the separation angle may be formed very large. For example, the separation angle may be formed up to a maximum of 360 degrees.

[0034] In each embodiment of the present invention, the protective film passing through the separation roll can pass through the first angle adjustment roll.

[0035] The first angle adjustment roll may be positioned so as to be adjustable. In this case, as the position of the first angle adjustment roll is adjusted, the second direction may be adjusted. Accordingly, the first angle adjustment roll may be used to adjust the separation angle.

[0036] At this time, in order to more intuitively and accurately adjust the separation angle, it is preferable that the protective film travels in a straight line between the separation roll and the first angle adjustment roll.

[0037] In each embodiment of the present invention, the separation membrane passing through the separation roll can pass through the second angle adjustment roll.

[0038] The second angle adjustment roll may be positioned so as to be adjustable. At this time, as the position of the second angle adjustment roll is adjusted, the third direction may be adjusted. Accordingly, the second angle adjustment roll may be used to adjust the separation angle.

[0039] At this time, in order to more intuitively and accurately control the separation angle, it is preferable that the separation membrane travels in a straight line between the separation roll and the second angle adjustment roll.

[0040] The present invention also provides a separation membrane running method, which includes a separation step of separating a sheet having a protective film attached to a continuously supplied separation membrane into a separation membrane and a protective film, wherein the running direction of the sheet before the separation step is referred to as a first direction, the running direction of the protective film immediately after the separation step is referred to as a second direction, and the running direction of the separation membrane immediately after the separation step is referred to as a third direction, wherein a separation angle, which is an angle formed by the second direction and the third direction, is 45 degrees or more.

[0041] The above membrane driving method may be performed using the above membrane driving device, but it is not necessarily required to do so.

[0042] According to the present invention, when the separation angle is 45 degrees or more, the separator and the protective film separated from the sheet can quickly move apart, and the change and instability of the tension of each of the separator and the protective film due to the electrostatic attraction between them can be significantly reduced.

[0043] According to the first embodiment, the separation angle may be 90 degrees or more. In this case, it was confirmed that the change in tension due to electrostatic attraction between the separation membrane and the protective film is reduced to a negligible level.

[0044] According to the first embodiment, the separation angle may be less than or equal to a first angle formed by the first direction and the second direction. That is, in this case, the separation membrane and the protective film are separated from each other by a difference in the angle at which they are bent with respect to the first direction during the separation step, and the difference in angle may form the separation angle.

[0045] According to the first embodiment, the separation angle may be equal to the first angle. In other words, this means that the protective film travels in a direction bent relative to the first direction during the separation step, and the separator travels in a direction not bent during the separation step, so that the separation angle formed between the separator and the protective film is formed at an angle equal to the angle at which the protective film is bent.

[0046] According to the second embodiment, the second angle formed by the first direction and the third direction may have the same direction as the first angle. That is, the separator and the protective film may be bent in the same direction during the separation step. At this time, the separation angle may be smaller than the first angle. Alternatively, the separation angle may be formed based on the difference between the first angle and the second angle.

[0047] In this case, unlike the case where the separator is not bent during the separation step, since both the separator and the protective film are provided with tension due to the bending, the tension of the separator can be more stable. That is, in this case, the support interval between the running of the separator is shortened, thereby preventing sagging of the separator between the supports.

[0048] According to one variation, the separation angle may be less than or equal to a third angle formed by the first direction and the third direction. That is, in this case, the separation membrane and the protective film are separated from each other by the difference in the angle at which they are bent with respect to the first direction during the separation step, and the difference in the angle may form the separation angle.

[0049] At this time, the separation angle may be equal to the third angle. In other words, this means that the separation membrane travels in a direction bent relative to the first direction while undergoing the separation step, and the protective film does not travel in a direction bent while undergoing the separation step, so that the separation angle formed between the separation membrane and the protective film is formed by the angle bent by the separation membrane while undergoing the separation step.

[0050] Alternatively, the fourth angle formed by the first direction and the second direction may have the same direction as the third angle. That is, the separator and the protective film may be bent in the same direction during the separation step. In this case, the separation angle may be smaller than the third angle. Alternatively, the separation angle may be formed based on the difference between the third angle and the fourth angle.

[0051] According to a third embodiment, the first direction and the second direction may form a fifth angle, and the first direction and the third direction may form a sixth angle that is opposite to the fifth angle. In other words, in this case, the separator and the protective film may be bent in opposite directions during the separation step. Accordingly, the separation angle may be formed very large. For example, the separation angle may be formed up to a maximum of 360 degrees.

[0052] The present invention can provide a membrane driving device and method that prevents defects due to tension instability of the membrane and protective film by significantly reducing the electrostatic attraction between the membrane and the protective film.

[0053] Another advantage of the present invention is that it can provide a membrane driving device and method that can control various variables related to tension changes in advance or in real time depending on the materials of the membrane and the protective film.

[0054] In addition, the present invention may have various other effects, which will be described in each embodiment, or the description of effects that can be easily inferred by a person skilled in the art will be omitted.

[0055] Figure 1 shows a conventional membrane driving device.

[0056] Figure 2 is an enlarged view of the main part of Figure 1.

[0057] Fig. 3 shows a membrane driving device according to the first embodiment.

[0058] Fig. 4 shows a membrane driving device according to the second embodiment.

[0059] Fig. 5 shows a membrane driving device according to a third embodiment.

[0060] Figure 6 illustrates a membrane driving method according to one embodiment of the present invention.

[0061] [Explanation of symbols]

[0062] 1: Sheet roll 10: Sheet 11: Separator 111: First side 112: Second side 12: Protective film 121: First side 122: Second side 2: Separation roll 21: First separation roll 22: Second separation roll 3: Recovery roll 4: Nip roll 51: First dancer roll 52: Second dancer roll 61: First angle adjustment roll 62: Second angle adjustment roll EA: Electrode assembly ST: Stack table X1~3: First to third directions SA: Separation angle A1~6: First to sixth angle

[0063] The above-described objects, features, and advantages will be described in detail below with reference to the accompanying drawings, so that those skilled in the art can easily practice the technical idea of ​​the present invention. In describing the present invention, if it is determined that a detailed description of known technologies related to the present invention may unnecessarily obscure the gist of the present invention, a detailed description thereof will be omitted. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to indicate the same or similar components.

[0064] Although the terms "first" and "second" are used to describe various components, these components are not limited by these terms. These terms are used solely to distinguish one component from another, and unless otherwise specified, a "first" component may also be a "second" component.

[0065] Throughout the specification, unless otherwise specifically stated, each element may be singular or plural.

[0066] Hereinafter, the phrase "any configuration is placed on (or below)" a component or "on (or below)" a component may mean that any configuration is placed in contact with the upper surface (or lower surface) of said component, and that other configurations may be interposed between said component and any configuration placed on (or below) said component.

[0067] Additionally, when it is described that a component is "connected," "coupled," or "connected" to another component, it should be understood that the components may be directly connected or connected to one another, but that other components may also be "interposed" between the components, or that each component may be "connected," "coupled," or "connected" through another component.

[0068] As used herein, singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as "consisting of" or "comprising" should not necessarily be construed to include all of the components or steps described in the specification, and should be construed to mean that some of the components or steps may not be included, or that additional components or steps may be included.

[0069] Throughout the specification, when we refer to "A and / or B", this means A, B, or A and B, unless otherwise stated, and when we refer to "C to D", this means C or more and D or less, unless otherwise stated.

[0070] Hereinafter, a preferred embodiment of the present invention will be described with reference to the attached drawings.

[0071] FIG. 3 shows a membrane driving device according to a first embodiment. Referring to this, the membrane driving device according to the present invention includes: a sheet roll (1) on which a sheet (10) having a protective film (12) made of synthetic resin attached to a first surface (111) of a membrane (11) is wound; a separation roll (2) on which the sheet (10) unwound from the sheet roll (1) continuously runs and is separated into the membrane (11) and the sheet (10); a recovery roll (3) on which the protective film (12) separated from the sheet (10) while passing over the separation roll (2) is wound and recovered; and a nip roll (4) for supplying the membrane (11) separated from the sheet (10) while passing over the separation roll (2) to a stack table (ST).

[0072] The sheet (10) may be configured such that the protective film (12) is attached to the first surface (111) of the separator (11). More specifically, the sheet (10) may be configured such that the separator (11) and the protective film (12) are attached to each other such that the second surface (122) of the protective film (12) is in contact with the first surface (111) of the separator (11), so that the second surface (112) of the separator (11) and the first surface (121) of the protective film (12) become their two surfaces.

[0073] At this time, the traveling direction of the sheet (10) immediately before passing the separation roll (2) may be referred to as a first direction (X1), the traveling direction of the protective film (12) immediately after passing the separation roll (2) may be referred to as a second direction (X2), and the traveling direction of the separation membrane (11) immediately after passing the separation roll (2) may be referred to as a third direction (X3). According to the present invention, the separation angle (SA), which is the angle formed by the second direction (X2) and the third direction (X3), is 45 degrees or more.

[0074] According to the present invention, as the separation angle (SA) becomes 45 degrees or more, the separation membrane (11) and the protective film (12) separated from the sheet (10) can quickly move apart, and the change and instability of the tension of each of the separation membrane (11) and the protective film (12) due to the electrostatic attraction therebetween can be significantly reduced.

[0075] According to the first embodiment, the separation angle (SA) may be 90 degrees or more. In this case, it was confirmed that the change in tension due to electrostatic attraction between the separation membrane (11) and the protective film (12) is reduced to a negligible level.

[0076] The above protective film (12) can pass through the first dancer roll (51) between the separation roll (2) and the recovery roll (3). At this time, the first dancer roll (51) moves in response to changes in tension applied to the protective film (12), and can act as a damper to prevent the tension applied to the protective film (12) from changing abruptly, or can help maintain the tension applied to the protective film (12) at a constant level.

[0077] The above separator (11) can pass through a second dancer roll (52) between the separator roll (2) and the nip roll (4). At this time, the second dancer roll (52) moves in response to changes in tension applied to the separator (11), and can act as a damper to prevent the tension applied to the separator (11) from changing abruptly, or can help maintain the tension applied to the separator (11) constant.

[0078] According to the first embodiment, the separation roll (2) may be arranged to be in contact with the first surface of the protective film (12). At this time, the separation angle (SA) may be less than or equal to the first angle (A1) formed by the first direction (X1) and the second direction (X2). That is, in this case, the separation membrane (11) and the protective film (12) are separated from each other by the difference in the angle at which they are bent with respect to the first direction (X1) while passing through the separation roll (2), and the difference in the angles may form the separation angle (SA).

[0079] According to the first embodiment, the separation angle (SA) may be equal to the first angle (A1). In other words, this means that the protective film (12) passes the separation roll (2) and travels in a direction bent with respect to the first direction (X1), and the separation membrane (11) passes the separation roll (2) and does not bend in its traveling direction, so that the separation angle (SA) formed between the separation membrane (11) and the protective film (12) is formed by the angle bent by the protective film (12) as it passes the separation roll (2).

[0080]

[0081] Below, parts not described separately regarding the second and third embodiments may be the same as those in the first embodiment described above.

[0082] Fig. 4 shows a membrane driving device according to a second embodiment. Referring to this, in the membrane driving device according to the second embodiment, a second angle (A2) formed by the first direction (X1) and the third direction (X3) may have the same direction as the first angle (A1). That is, the membrane (11) and the protective film (12) may be bent in the same direction while passing through the separation roll (2). At this time, the separation angle (SA) may be smaller than the first angle (A1). Alternatively, the separation angle (SA) may be formed based on the difference between the first angle (A1) and the second angle (A2).

[0083] In this case, unlike the case where the separator (11) does not bend as it passes over the separation roll (2), since both the separator (11) and the protective film (12) receive tension from the separation roll (2), the tension of the separator (11) can be more stable. That is, in this case, the support interval between the running of the separator (11) is shortened, so that sagging of the separator (11) between the support parts can be prevented.

[0084] According to one modified example, the separation structure of the separating membrane (11) and the protective film (12) can be equally applied even when the separating membrane (11) and the protective film (12) are subjected to the opposite action of the separating roll (2).

[0085] For example, according to the above-described modified example, the separation roll (2) may be arranged to be in contact with the second surface (112) of the separation membrane (11). At this time, the separation angle (SA) may be less than or equal to a third angle formed by the first direction (X1) and the third direction (X3). That is, in this case, the separation membrane (11) and the protective film (12) may be separated from each other by the difference in the angle at which they are bent with respect to the first direction (X1) while passing through the separation roll (2), and the difference in the angles may form the separation angle (SA).

[0086] At this time, the separation angle (SA) may be equal to the third angle. In other words, the separation film (11) passes the separation roll (2) and travels in a direction bent with respect to the first direction (X1), and the protective film (12) passes the separation roll (2) and does not bend in its traveling direction, so the separation angle (SA) formed between the separation film (11) and the protective film (12) is formed at the angle equal to the angle at which the separation film (11) passes the separation roll (2).

[0087] Or, at this time, the fourth angle formed by the first direction (X1) and the second direction (X2) may have the same direction as the third angle. That is, the separator (11) and the protective film (12) may be bent in the same direction while passing through the separation roll (2). At this time, the separation angle (SA) may be smaller than the third angle. Alternatively, the separation angle (SA) may be formed based on the difference between the third angle and the fourth angle.

[0088] Fig. 5 shows a membrane driving device according to a third embodiment. Referring to this, in the membrane driving device according to the third embodiment, the separation roll (2) may include a first separation roll (21) that contacts the first surface (121) of the protective film (12) and a second separation roll (22) that contacts the second surface (112) of the membrane (11). That is, the separation rolls (2) may be provided as a pair that contacts both surfaces of the sheet (10). At this time, the first direction (X1) and the second direction (X2) may form a fifth angle (A5), and the first direction (X1) and the third direction (X3) may form a sixth angle (A6) that is opposite to the fifth angle (A5). That is, in this case, the separator (11) and the protective film (12) can be bent in opposite directions while passing through the separating roll (2). Accordingly, the separation angle (SA) can be formed very large. For example, the separation angle (SA) can be formed up to a maximum of 360 degrees.

[0089] Referring to FIGS. 3 to 5 together, in each embodiment of the present invention, the protective film (12) that has passed the separation roll (2) can pass through the first angle adjustment roll (61).

[0090] The first angle adjustment roll (61) can be positioned so as to be positionally adjustable. At this time, as the position of the first angle adjustment roll (61) is adjusted, the second direction (X2) can be adjusted. Accordingly, the first angle adjustment roll (61) can be used to adjust the separation angle (SA).

[0091] At this time, in order to more intuitively and accurately control the separation angle (SA), it is preferable that the protective film (12) travels in a straight line between the separation roll (2) and the first angle adjustment roll (61).

[0092] In each embodiment of the present invention, the separation membrane (11) that has passed the separation roll (2) can pass through the second angle adjustment roll (62).

[0093] The second angle adjustment roll (62) can be positioned so as to be positionally adjustable. At this time, as the position of the second angle adjustment roll (62) is adjusted, the third direction (X3) can be adjusted. Accordingly, the second angle adjustment roll (62) can be used to adjust the separation angle (SA).

[0094] At this time, in order to more intuitively and accurately control the separation angle (SA), it is preferable that the separation membrane (11) travels in a straight line between the separation roll (2) and the second angle adjustment roll (62).

[0095]

[0096] Figure 6 illustrates a membrane driving method according to one embodiment of the present invention. Referring to this, the membrane driving method according to one embodiment of the present invention includes: a first supply step (S1) of continuously supplying the sheet; a separation step (S2) of separating the sheet (10) into the membrane (11) and the protective film (12); and a second supply step (S3) of supplying the membrane (11) to the stack table (ST) while simultaneously recovering the protective film (12).

[0097] At this time, in the separation step (S2), the separation membrane and the protective film are separated by a predetermined separation angle. Specifically, when the running direction of the sheet before the separation step (S2) is referred to as the first direction, the running direction of the protective film immediately after the separation step (S2) is referred to as the second direction, and the running direction of the separation membrane immediately after the separation step (S2) is referred to as the third direction, the separation angle is the angle formed by the second direction and the third direction, and is 45 degrees or more.

[0098] The above membrane driving method may be performed using the above membrane driving device, but it is not necessarily required to do so.

[0099] According to the present invention, when the separation angle is 45 degrees or more, the separator and the protective film separated from the sheet can quickly move apart, and the change and instability of the tension of each of the separator and the protective film due to the electrostatic attraction between them can be significantly reduced.

[0100] According to the first embodiment, the separation angle may be 90 degrees or more. In this case, it was confirmed that the change in tension due to electrostatic attraction between the separation membrane and the protective film is reduced to a negligible level.

[0101] According to the first embodiment, the separation angle may be less than or equal to a first angle formed by the first direction and the second direction. That is, in this case, the separation membrane and the protective film are separated from each other by a difference in the angle at which they are bent with respect to the first direction during the separation step, and the difference in angle may form the separation angle.

[0102] According to the first embodiment, the separation angle may be equal to the first angle. In other words, this means that the protective film travels in a direction bent relative to the first direction during the separation step, and the separator travels in a direction not bent during the separation step, so that the separation angle formed between the separator and the protective film is formed at an angle equal to the angle at which the protective film is bent.

[0103] According to the second embodiment, the second angle formed by the first direction and the third direction may have the same direction as the first angle. That is, the separator and the protective film may be bent in the same direction during the separation step. At this time, the separation angle may be smaller than the first angle. Alternatively, the separation angle may be formed based on the difference between the first angle and the second angle.

[0104] In this case, unlike the case where the separator is not bent during the separation step, since both the separator and the protective film are provided with tension due to the bending, the tension of the separator can be more stable. That is, in this case, the support interval between the running of the separator is shortened, thereby preventing sagging of the separator between the supports.

[0105] According to one variation, the separation angle may be less than or equal to a third angle formed by the first direction and the third direction. That is, in this case, the separation membrane and the protective film are separated from each other by the difference in the angle at which they are bent with respect to the first direction during the separation step, and the difference in the angle may form the separation angle.

[0106] At this time, the separation angle may be equal to the third angle. In other words, this means that the separation membrane travels in a direction bent relative to the first direction while undergoing the separation step, and the protective film does not travel in a direction bent while undergoing the separation step, so that the separation angle formed between the separation membrane and the protective film is formed by the angle bent by the separation membrane while undergoing the separation step.

[0107] Alternatively, the fourth angle formed by the first direction and the second direction may have the same direction as the third angle. That is, the separator and the protective film may be bent in the same direction during the separation step. In this case, the separation angle may be smaller than the third angle. Alternatively, the separation angle may be formed based on the difference between the third angle and the fourth angle.

[0108] According to a third embodiment, the first direction and the second direction may form a fifth angle, and the first direction and the third direction may form a sixth angle that is opposite to the fifth angle. In other words, in this case, the separator and the protective film may be bent in opposite directions during the separation step. Accordingly, the separation angle may be formed very large. For example, the separation angle may be formed up to a maximum of 360 degrees.

[0109]

[0110] It should be understood that the above-described embodiments are illustrative in all respects and not restrictive, and the scope of the present invention will be determined by the claims that follow, rather than by the detailed description set forth above. Furthermore, the meaning and scope of the claims that follow, as well as all possible modifications and variations derived from their equivalent concepts, should be construed as encompassing the scope of the present invention.

[0111] Although the present invention has been described with reference to the drawings exemplified above, it is to be understood that the present invention is not limited to the embodiments and drawings disclosed herein, and that various modifications may be made by those skilled in the art within the scope of the technical idea of ​​the present invention. Furthermore, even if the operational effects according to the configuration of the present invention have not been explicitly described while describing the embodiments of the present invention, it is natural that the effects predictable by the corresponding configuration should also be acknowledged.

Claims

1. A sheet roll in which a sheet having a protective film made of synthetic resin attached to the first surface of the separator is wound; A separation roll in which the sheet is continuously run and separated from the separator and the sheet, which is unwound from the sheet roll; A recovery roll for winding and recovering the protective film separated from the sheet while passing through the separation roll; and A nip roll for supplying the separating film separated from the sheet by passing through the separating roll to a stack table; The direction of travel of the sheet immediately before passing the above separation roll is called the first direction, The direction of travel of the protective film immediately after passing the above separation roll is called the second direction. When the direction of travel of the separator immediately after passing the above separation roll is called the third direction, A membrane driving device in which the separation angle formed by the second direction and the third direction is 45 degrees or more.

2. A membrane driving device according to claim 1, wherein the separation angle is 90 degrees or more.

3. In claim 1, the protective film is a separation membrane driving device that passes through the first dancer roll between the separation roll and the recovery roll.

4. In claim 1, the separation membrane is a separation membrane driving device that passes through a second dancer roll between the separation roll and the nip roll.

5. In claim 1, the separation roll is arranged to be in contact with the first surface of the protective film, A membrane driving device, wherein the above separation angle is less than or equal to the first angle formed by the first direction and the second direction.

6. In claim 5, the separation angle is the same as the first angle, the separation membrane driving device.

7. In claim 5, the second angle formed by the first direction and the third direction has the same direction as the first angle, A membrane driving device wherein the above separation angle is smaller than the first angle.

8. In claim 1, the separation roll is arranged to be in contact with the second surface of the separation membrane, A membrane driving device, wherein the above separation angle is less than or equal to a third angle formed by the first direction and the third direction.

9. In claim 8, the separation angle is the same as the third angle, a separation membrane driving device.

10. In claim 8, the fourth angle formed by the first direction and the second direction has the same direction as the third angle, A membrane driving device wherein the above separation angle is smaller than the third angle.

11. In claim 1, the separation roll includes a first separation roll in contact with the first side of the protective film and a second separation roll in contact with the second side of the separation membrane. The above first direction and the above second direction form a fifth angle, A membrane driving device in which the first direction and the third direction form a sixth angle that is opposite to the fifth angle.

12. In claim 1, the protective film that has passed the separation roll passes through the first angle adjustment roll, A membrane driving device in which the first angle adjustment roll is positioned so as to be positionally adjustable.

13. A separation film driving device according to claim 12, wherein the protective film runs in a straight line between the separation roll and the first angle adjustment roll.

14. In claim 1, the separation membrane that has passed the separation roll passes through the second angle adjustment roll, A membrane driving device in which the second angle adjustment roll is positioned so as to be positionally adjustable.

15. A separation membrane driving device according to claim 14, wherein the separation membrane travels in a straight line between the separation roll and the second angle adjustment roll.

16. A separation step for separating a sheet with a protective film attached to a continuously supplied separator into a separator and a protective film, The driving direction of the sheet before the above separation step is called the first direction, The direction of travel of the protective film immediately after the above separation step is called the second direction, When the direction of movement of the separation membrane immediately after the above separation step is called the third direction, A membrane driving method wherein the separation angle formed by the second direction and the third direction is 45 degrees or more.

17. A membrane driving method according to claim 16, wherein the separation angle is 90 degrees or more.

18. A membrane driving method according to claim 16, wherein the separation angle is less than or equal to a first angle formed by the first direction and the second direction.

19. A membrane driving method according to claim 18, wherein the separation angle is the same as the first angle.

20. In claim 18, the second angle formed by the first direction and the third direction has the same direction as the first angle, A membrane driving method wherein the above separation angle is smaller than the first angle.

21. A membrane driving method according to claim 16, wherein the separation angle is less than or equal to a third angle formed by the first direction and the third direction.

22. A membrane driving method according to claim 21, wherein the separation angle is the same as the third angle.

23. In claim 21, the fourth angle formed by the first direction and the second direction has the same direction as the third angle, A membrane driving method wherein the above separation angle is smaller than the third angle.

24. In claim 16, the first direction and the second direction form a fifth angle, A membrane driving method wherein the first direction and the third direction form a sixth angle that is opposite to the fifth angle.

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