Electrode connection film winding device, winding method, and electrode roll

Abstract

The disclosed invention includes: a bobbin mounting unit in which a bobbin is mounted; a film supply unit configured to supply an electrode connection film to the bobbin; a transfer unit configured to transfer the electrode connection film mounted in the film supply unit to the bobbin mounting unit; a tape attachment unit mounted above the bobbin mounting unit and configured to attach an end portion of the electrode connection film pulled out to the transfer unit to the bobbin; a double-sided tape attachment unit configured to attach a double-sided tape to the electrode connection film wound on the bobbin; and a frame body to which the tape attachment unit and the double-sided tape attachment unit are movably mounted.

Description

TECHNICAL FIELD

[0001] This application claims priority to Korean Patent Application No. 10-2022-0019068, filed on February 14, 2022, and Korean Patent Application No. 10-2023-0013851, filed on February 1, 2023, the entire disclosure of which is incorporated herein by reference.

[0002] The present application relates to an electrode connection film winding device for improving electrode loss.

[0003] More particularly, the present application relates to an electrode connection film winding device that is capable of minimizing electrode loss that occurs when connecting an electrode during a roll-to-roll process, by mounting and winding an electrode connection film on an empty bobbin and allowing an electrode to be connected to the electrode connection film.

[0004] In addition, the present application relates to a method of winding an electrode connection film for improving electrode loss.

[0005] In addition, the present application relates to an electrode roll having an electrode connection film. BACKGROUND

[0006] Recently, secondary batteries capable of charging and discharging have been widely used as energy sources for wireless mobile devices.

[0007] In addition, secondary batteries are not only used as energy sources for portable devices such as mobile phones, notebook computers, and camcorders, but also are attracting attention as energy sources for electric vehicles, hybrid electric vehicles, and the like, which are proposed as a solution to air pollution by existing gasoline vehicles and diesel vehicles using fossil fuels.

[0008] Accordingly, due to the advantages of secondary batteries, the types of applications using secondary batteries are becoming increasingly diverse, and it is expected that in the future, secondary batteries will be applied to more fields and products than now.

[0009] Such secondary batteries can be classified into lithium ion batteries, lithium ion polymer batteries, lithium polymer batteries, and the like, depending on the composition of the electrodes and electrolytes, and the use amount of lithium ion polymer batteries, which are less likely to leak electrolytes and are easy to manufacture, is increasing.

[0010] In general, depending on the shape of the battery case, secondary batteries are classified into cylindrical batteries and prismatic batteries in which an electrode assembly is embedded in a cylindrical or prismatic metal can, and pouch-type batteries in which an electrode assembly is embedded in a pouch-type case of an aluminum laminate sheet.

[0011] In addition, the electrode assembly embedded in the battery case is composed of a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode, and is a power generation element capable of charging and discharging. The electrode assembly is classified into a jelly-roll type in which the separator interposed between the positive electrode and the negative electrode is wound in a long sheet shape and coated with an active material, and a stacked type in which a plurality of positive electrodes and negative electrodes of a predetermined size are sequentially stacked while the separator is interposed between the positive electrode and the negative electrode.

[0012] Here, an electric vehicle or the like requires a plurality of battery modules because high-power electric energy is used, and the battery modules have a plurality of battery cells connected in series or in parallel therein.

[0013] Meanwhile, the electrode completed through the electrode coating process can be wound on an empty bobbin and sequentially transferred to subsequent processes, such as a roll-pressing process, a slitting process, and the like.

[0014] When an electrode roll (parent roll) is manufactured by winding an electrode on a bobbin, a double-sided tape is first wound and attached to an empty bobbin. Next, a tape (for example, an oriented polypropylene (OPP) tape) is attached to the double-sided tape wound on the bobbin. For the tape, a preliminary work is manually performed by an operator directly on the empty bobbin so that an adhesive surface is exposed facing the electrode to be wound, while a non-adhesive surface is attached facing the double-sided tape.

[0015] In this way, the electrode roll is manufactured by attaching and winding one end of the electrode to the adhesive surface of the tape on which the preliminary work is performed.

[0016] As described above, the electrode roll is conventionally manufactured by winding a double-sided tape on a bobbin, attaching a tape to the double-sided tape, and attaching an electrode to the adhesive side of the tape.

[0017] Such an electrode roll is mounted on an unwinder of a roll-pressing apparatus for subsequent operations (for example, a roll-pressing operation). The end portion of the electrode roll is unwound toward a rewinder, and a roll-to-roll process is performed between the unwinder and the rewinder. In this process, a predetermined operation (for example, a roll-pressing operation) is performed. When the electrode roll on the unwinder is almost completely unwound, a splicing operation of connecting the end portion of the electrode of a new electrode roll to the end portion of the electrode of an almost completely used electrode roll is performed.

[0018] When the electrode roll in which only a few electrodes remain is called an old roll, and a newly input electrode roll is called a new roll, the new roll and the old roll are automatically spliced.

[0019] At this time, the old roll and / or the new roll are rotated so that the electrodes of the old roll and the electrodes of the new roll are automatically spliced. The roll-pressing operation is continued on the electrodes on the new roll which is automatically spliced, and the electrodes remaining on the old roll after the splicing are cut off and discarded.

[0020] Here, the end of the electrode of the old roll will not be used because it is attached to the tape on the bobbin, which results in as much electrode loss as the portion attached to the tape and the cut section.

[0021] In addition, since the preliminary work is performed manually, there is a problem in that work efficiency is reduced and a safety accident can occur.

[0022] [Related Art Documents]

[0023] [Patent Documents]

[0024] (Patent Document 1) Korean Registered Patent No. 10-1617954 SUMMARY

[0025] TECHNICAL PROBLEM

[0026] The present invention has been made to solve at least some of the above problems. For example, the present invention is directed to providing an electrode connection film winding device and an electrode connection film winding method, which can minimize electrode loss generated when connecting an electrode in a roll-pressing process by mounting an electrode connection film on a bobbin, then connecting an electrode to the electrode connection film and winding the electrode.

[0027] In addition, the present invention is directed to providing an electrode connection film winding device and a winding method, which can prevent electrode loss and quality defects by replacing an electrode loss portion with an electrode connection film.

[0028] In addition, the present invention is directed to providing an electrode roll having a structure in which an electrode of a new roll and an electrode of an old roll can be connected to prevent electrode loss.

[0029] TECHNICAL SOLUTION

[0030] To achieve the above object, the present invention includes a bobbin mounting unit in which a bobbin is mounted, a film supply unit configured to supply an electrode connection film to the bobbin, a transfer unit configured to transfer the electrode connection film mounted in the film supply unit to the bobbin mounting unit, a tape attachment unit mounted above the bobbin mounting unit and configured to attach an end of the electrode connection film pulled out to the transfer unit to the bobbin, a double-sided tape attachment unit configured to attach a double-sided tape to the electrode connection film wound on the bobbin, and a frame body to which the tape attachment unit and the double-sided tape attachment unit are movably mounted.

[0031] The bobbin mounting unit can include a winder configured to wind the electrode connection film by rotating the bobbin, and a chucking member configured to fix the bobbin mounted in the winder.

[0032] The tape attachment unit can be installed to be horizontally movable in a width direction of the bobbin, and the tape attachment unit can fix the electrode connection film to the bobbin by attaching the tape to an end portion of the electrode connection film while moving in the width direction of the bobbin.

[0033] The electrode connection film winding device can include a cutting unit connected to the tape attachment unit and configured to cut the electrode connection film to which the double-coated tape is attached by the double-coated tape attachment unit.

[0034] The electrode connection film winding device can include a final processing adhesive attachment unit provided below the cutting unit and configured to fix the electrode connection film by attaching a final processing adhesive to a cut end portion of the electrode connection film.

[0035] The double-coated tape attachment unit can be installed to be vertically movable above the conveying unit.

[0036] The electrode connection film winding device can include a release paper peeling unit configured to peel a release paper from the double-coated tape attached to the electrode connection film.

[0037] The conveying unit can include one or more bottom plates configured to support the conveyed electrode connection film, one or more drive rollers configured to convey the electrode connection film, and a moving roller movably installed to maintain tension of the conveyed electrode connection film.

[0038] According to an aspect of the present application, there is provided a method of winding an electrode connection film, the method including: introducing and installing a bobbin; positioning an end portion of the electrode connection film on the bobbin; fixing the electrode connection film to the bobbin by attaching a tape to the end portion of the electrode connection film; winding the electrode connection film on the bobbin by rotating the bobbin; attaching a double-coated tape to the electrode connection film wound on the bobbin; and cutting the electrode connection film to which the double-coated tape is attached.

[0039] The method can further include peeling a release paper from the double-coated tape after the double-coated tape is attached to the electrode connection film.

[0040] The method can further include fixing an end portion of the electrode connection film adjacent to a portion to which the double-coated tape is attached by attaching a final processing adhesive to the end portion of the electrode connection film after the electrode connection film to which the double-coated tape is attached is cut.

[0041] According to still another aspect of the present application, there is provided an electrode roll including a bobbin, an electrode connection film wound along a circumference of the bobbin, a double-coated tape attached to an outermost end portion of the electrode connection film wound along the circumference of the bobbin, and an electrode connected to the double-coated tape and wound along the circumference of the bobbin on an outer side of the electrode connection film.

[0042] The electrode roll can include a tape for coupling the bobbin to a roll start end portion of the electrode connection film.

[0043] The electrode connection film can include one of a group consisting of polyethylene terephthalate (PET), polyethylene naphthalate (PEN), oriented polypropylene (OPP), polyimide (PI), polybutylene terephthalate (PBT), polyester, polyacetal, polyamide, polyethersulfone, polyphenylene ether, polyphenylene sulfide, polyethylenenaphthalene, flexible silicone, and the like.

[0044] The tape can be an OPP tape.

[0045] Advantageous Effects

[0046] According to the present application, by mounting the electrode connection film on the bobbin and then winding the electrode on the electrode connection film, it is possible to prevent electrode loss by minimizing the electrode remaining on the electrode roll and being discarded during automatic splicing of the electrode in a roll-to-roll process.

[0047] In addition, by replacing the electrode loss portion with the electrode connection film, it is possible to minimize electrode loss and prevent quality defects.

[0048] Further, by automating the preliminary work that has previously relied on human labor, it is possible to simplify the workflow and reduce the workload of workers. BRIEF DESCRIPTION OF DRAWINGS

[0049] Figure 1 FIG. 1 is a view schematically illustrating a state in which a release paper is peeled from a double-sided tape by a release paper peeling unit of an electrode connection film winding apparatus according to an embodiment of the present application.

[0050] Figure 2 FIG. 1 is a view schematically illustrating a state in which a release paper is peeled from a double-sided tape by a release paper peeling unit of an electrode connection film winding apparatus according to an embodiment of the present application.

[0051] Figure 3 FIG. 4 is a process diagram schematically illustrating a process of mounting an electrode connection film on a bobbin according to another embodiment of the present application.

[0052] Figure 4 FIG. 5 is a flowchart illustrating a method of winding an electrode connection film according to another embodiment of the present application.

[0053] Figure 5 FIG. 1 is a view schematically illustrating a state in which a release paper is peeled from a double-sided tape by a release paper peeling unit of an electrode connection film winding apparatus according to an embodiment of the present application.

[0054] Figure 6 FIG. 4 is a process diagram schematically illustrating a process of mounting an electrode connection film on a bobbin according to another embodiment of the present application.

[0055] Figure 7is a flowchart illustrating a method of winding an electrode connecting film according to another embodiment of the present application.

[0056] [Explanation of reference signs]

[0057] 1 and 1': electrode connecting film winding apparatus

[0058] 10: bobbin mounting unit

[0059] 11: bobbin

[0060] 13: winding machine

[0061] 20: electrode connecting film supply unit

[0062] 21: electrode connecting film

[0063] 23: unwinder

[0064] 30: conveyance unit

[0065] 31: base plate

[0066] 31a: first base plate

[0067] 31b: second base plate

[0068] 33: drive roller

[0069] 35: moving roller

[0070] 40: adhesive tape attaching unit

[0071] 41: adhesive tape

[0072] 50: double-sided tape attaching unit

[0073] 51: double-sided tape

[0074] 51a: release paper

[0075] 60: frame body

[0076] 70: release paper peeling unit

[0077] 71: gripper

[0078] 80: cutting unit

[0079] 90: final processing adhesive attaching unit

[0080] 91: final processing adhesive

[0081] 93: suction member

[0082] Best mode

[0083] The present application provides an electrode connecting film winding device including: a bobbin mounting unit in which a bobbin is mounted; a film supply unit configured to supply an electrode connecting film to the bobbin; a transfer unit configured to transfer the electrode connecting film mounted in the film supply unit into the bobbin mounting unit; a tape attachment unit mounted above the bobbin mounting unit and configured to attach an end portion of the electrode connecting film pulled out from the transfer unit to the bobbin; a double-sided tape attachment unit configured to attach a double-sided tape to the electrode connecting film wound on the bobbin; and a frame body to which the tape attachment unit and the double-sided tape attachment unit are movably mounted.

[0084] The present application also provides a method of winding an electrode connecting film, the method including: introducing and mounting a bobbin; positioning an end portion of an electrode connecting film on the bobbin; fixing the electrode connecting film to the bobbin by attaching a tape to the end portion of the electrode connecting film; winding the electrode connecting film on the bobbin by rotating the bobbin; attaching a double-sided tape to the electrode connecting film wound on the bobbin; and cutting the electrode connecting film to which the double-sided tape is attached.

[0085] The present application also provides an electrode roll including a bobbin, an electrode connecting film wound along a circumference of the bobbin, a double-sided tape attached to an outermost end portion of the electrode connecting film wound along the circumference of the bobbin, and an electrode connected to the double-sided tape and wound along the circumference of the bobbin on an outer side of the electrode connecting film.

[0086] Best mode for carrying out the present application

[0087] Hereinafter, the present application will be described in detail with reference to the accompanying drawings. Before that, the terms and words used in the present specification and claims should not be interpreted as being limited to the commonly used or dictionary terms, but should be interpreted as having meanings and concepts conforming to the technical idea of the present application based on the principle that the inventor appropriately defines the concept of the terms in the best mode for carrying out the present application.

[0088] It should be understood that the terms such as "include", "have", and "comprise" used in the present specification and claims are intended to indicate the presence of features, numbers, operations, actions, components, parts, or combinations thereof disclosed in the specification, and are not intended to exclude the presence or addition of one or more other features, numbers, operations, actions, components, parts, or combinations thereof.

[0089] Further, when a part of a layer, film, region, plate, and the like is "on" another part, the statement includes the meaning of the part being "directly on" the other part, except that another part is interposed therebetween. In contrast, when a part of a layer, film, region, plate, and the like is "under" another part, the statement includes the meaning of the part being "directly under" the other part, except that another part is interposed therebetween. Further, in the specification of the present application, being disposed "on" can include not only being disposed above but also being disposed below.

[0090] (First Embodiment)

[0091] Figure 1 is a schematic view of an electrode connecting film winding apparatus according to an embodiment of the present application. Figure 2 is a view schematically illustrating a state in which a release paper is peeled from a double-sided tape by a release paper peeling unit of an electrode connecting film winding apparatus according to an embodiment of the present application. Figure 3 is a process view schematically illustrating a process of mounting an electrode connecting film on a bobbin. Figure 4 is a flowchart illustrating a method of winding an electrode connecting film according to an embodiment of the present application.

[0092] As shown in Figure 1 , an electrode connecting film winding apparatus 1 according to an embodiment of the present application includes a bobbin mounting unit 10, an electrode connecting film supply unit 20, a conveying unit 30, a tape attaching unit 40, a double-sided tape attaching unit 50, and a frame body 60.

[0093] The bobbin mounting unit 10 is used to mount an empty bobbin 11 in a state before winding an electrode.

[0094] To this end, the bobbin mounting unit 10 includes a winder 13 configured to wind an electrode connecting film 21 by rotating the empty bobbin 11, and a chucking member (not shown) configured to fix the empty bobbin 11 mounted in the winder 13.

[0095] The winder 13 is coupled to both ends of the bobbin 11 and rotates the empty bobbin 11. The chucking member can chuck an edge of the empty bobbin 11 coupled to the winder 13 to fix the empty bobbin 11 to the winder 13.

[0096] Since the winder 13 for rotating the empty bobbin 11 and the chucking member for fixing the empty bobbin 11 to the winder 13 are known configurations, detailed descriptions of the winder and the chucking member will be omitted.

[0097] The electrode connecting film supply unit 20 is disposed adjacent to the bobbin mounting unit 10 and supplies the electrode connecting film 21 to the empty bobbin 11.

[0098] To this end, an uncoiler 23 for mounting the electrode connecting film 21 in the form of a roll is provided in the electrode connecting film supply unit 20, and the uncoiler 23 can be formed in a cantilever structure.

[0099] The uncoiler 23 can be partially fixed to prevent the electrode connecting film 21 from sagging due to the weight of the electrode connecting film 21.

[0100] The electrode connecting film 21 mounted on the uncoiler 23 is supplied to the empty bobbin 11 of the bobbin mounting unit 10.

[0101] By the structure as described above, when the electrode connecting film supply unit 20 supplies the electrode connecting film 21 to the bobbin mounting unit 10, the empty bobbin 11 is rotated by the operation of the winder 13 to wind the electrode connecting film 21 on the empty bobbin 11.

[0102] The transfer unit 30 transfers the electrode connecting film 21 mounted in the electrode connecting film supply unit 20 to the bobbin mounting unit 10. That is, the transfer unit 30 functions to transfer the electrode connecting film 21 supplied from the electrode connecting film supply unit 20 to the empty bobbin 11 of the bobbin mounting unit 10.

[0103] As shown in FIG. 1, the transfer unit 30 includes a base plate 31, a driving roller 33 rotating to transfer the electrode connecting film 21, and a moving roller 35. Figure 2 The base plate 31 can be formed in a flat plate shape, and can be provided as one or more base plates. The base plate 31 functions as a worktable when attaching a tape to the electrode connecting film 21 or cutting, in addition to supporting the electrode connecting film pulled out from the electrode connecting film supply unit 20.

[0104] The base plate 31 can include a first base plate 31a disposed adjacent to the electrode connecting film supply unit 20 and a second base plate 31b disposed adjacent to the empty bobbin 11.

[0105] At least one driving roller 33 is provided adjacent to the base plate 31, and by the rotation of the driving roller 33, the electrode connecting film is transferred toward the bobbin mounting unit 10 while being supported by the base plate 31.

[0106] The moving roller 35 functions to constantly maintain the tension of the electrode connecting film 21 pulled out from the electrode connecting film supply unit 20, and is movably mounted so that the position of the moving roller 35 is adjusted in response to the tension acting on the electrode connecting film 21 while rotating so that the electrode connecting film 21 is transferred toward the bobbin mounting unit 10.

[0107] The transfer unit 30 transfers the electrode connecting film 21 mounted in the electrode connecting film supply unit 20 to the bobbin mounting unit 10. That is, the transfer unit 30 functions to transfer the electrode connecting film 21 supplied from the electrode connecting film supply unit 20 to the empty bobbin 11 of the bobbin mounting unit 10.

[0108] The moving roller 35 can maintain tension during cutting, taping, and final processing of the electrode connecting film 21 pulled out from the electrode connecting film supply unit 20. When the electrode connecting film 21 conveyed by driving of the driving roller 33 is cut, taped, and finally processed on the bottom plate 31, the process can be performed in a state where the moving roller 35 moves to maintain tension.

[0109] The tape attaching unit 40 is installed above the bobbin mounting unit 10. Preferably, the tape attaching unit 40 is installed above the bobbin mounting unit 10 to be vertically movable. The tape attaching unit 40 attaches an end portion of the electrode connecting film 21 pulled out from the electrode connecting film supply unit 20 via the conveying unit 30 to the bobbin 11.

[0110] The tape 41 in a roll form is installed in the tape attaching unit 40, and the installed tape 41 is supplied to the empty bobbin 11.

[0111] The tape attaching unit 40 is installed to be horizontally movable in the width direction of the bobbin 11. Accordingly, the tape attaching unit 40 attaches the tape to the end portion of the electrode connecting film 21 while moving in the width direction of the empty bobbin 11. Accordingly, the electrode connecting film 21 is fixed to the bobbin due to the tape.

[0112] Specifically, the tape attaching unit 40 descends toward the empty bobbin 11 installed in the bobbin mounting unit 10, and attaches the tape 41 so that the tape 41 covers the empty bobbin 11 and the end portion of the electrode connecting film 21. First, the tape attaching unit 40 attaches the tape 41 to one side of the empty bobbin 11 in the width direction, and then moves horizontally toward the other side of the empty bobbin 11 in the width direction to attach the tape 41, thereby fixing the electrode connecting film 21 to the empty bobbin 11.

[0113] After the tape 41 is attached along the width direction of the bobbin, the tape attaching unit 40 returns to its initial position. This process is repeated in the same manner for the next empty bobbin 11 newly installed in the bobbin mounting unit 10.

[0114] When the electrode connecting film 21 is fixed to the empty bobbin 11, the winding machine 13 rotates the bobbin a predetermined number of times to wind a predetermined length of the electrode connecting film 21 on the empty bobbin 11.

[0115] The double-sided tape attaching unit 50 is provided adjacent to the upper portion of the conveying unit 30 to attach the double-sided tape 51 to the electrode connecting film 21 wound on the empty bobbin 11.

[0116] To this end, the double-sided tape attaching unit 50 can be provided above the conveying unit 30 to be vertically movable, and attach the double-sided tape 51 to the electrode connecting film 21 conveyed by the conveying unit 30.

[0117] In the double-sided tape attachment unit 50, a double-sided tape 51 is mounted in a roll, and the double-sided tape 51 has adhesive surfaces on both sides.

[0118] The double-sided tape attachment unit 50 descends toward the electrode connection membrane 21, which is pulled out from the electrode connection membrane supply unit 20 and conveyed by the conveying unit 30. The descending double-sided tape attachment unit 50 attaches the double-sided tape 51 to the electrode connection membrane 21, and then rises again. This process is repeated in the same manner for the next empty bobbin 11 newly installed in the bobbin mounting unit 10.

[0119] In embodiments of the invention, the double-sided tape attachment unit 50 is provided to be vertically movable; however, the double-sided tape attachment unit 50 may also be mounted to be horizontally movable in the width direction of the electrode connection film 21. In this case, the double-sided tape attachment unit 50 can attach the double-sided tape 51 to the electrode connection film 21 while moving in the width direction. Furthermore, various other design modifications are possible, such as a double-sided tape attachment unit 50 that moves in both the vertical and horizontal directions.

[0120] Meanwhile, the electrode connection film winding device 1 according to one embodiment of the present invention may further include an anti-adhesive paper peeling unit 70. The anti-adhesive paper peeling unit 70 may be configured to be adjacent to the double-sided tape attachment unit 50 and to peel the anti-adhesive paper 51a from the double-sided tape 51 attached to the electrode connection film 21.

[0121] Therefore, the release paper peeling unit 70 may include a clamp 71 for holding the release paper 51a.

[0122] On the second base plate 31b of the conveying unit 30, a double-sided tape 51 can be attached to the electrode connection film 21 pulled out from the conveying unit 30 via a double-sided tape attachment unit 50. In addition, the electrode connection film 21 to which the double-sided tape 51 is attached moves continuously by the rotation of each drive roller 33, and the release paper 51a attached to the double-sided tape 51 is removed by the release paper peeling unit 70.

[0123] In other words, such as Figure 2 As shown, after the double-sided tape 51 is attached to the electrode connection film 21, the moving roller 35, provided adjacent to the first base plate 31a, moves diagonally toward the lower part of the first base plate 31a. At this time, the gripper 71 provided at the front end of the release paper peeling unit 70 can hold the release paper 51a and then peel the release paper 51a from the double-sided tape 51. After peeling off the release paper 51a, the moving roller 35 can move diagonally backward to return to its original position.

[0124] According to one embodiment of the present application, the release paper peeling unit 70 includes a gripper 71, but a suction unit (not shown) can also be provided in the release paper peeling unit 70 to peel the release paper 51a from the double-coated tape 51 using suction force.

[0125] The electrode connecting film winding device 1 according to one embodiment of the present application further includes a cutting unit 80 for cutting the electrode connecting film 21. The cutting unit 80 can be connected to the tape attaching unit 40. The cutting unit 80 cuts the electrode connecting film 21 to which the double-coated tape 51 is attached to an appropriate length.

[0126] As described above, the electrode connecting film 21 to which the double-coated tape 51 is attached is cut on the empty bobbin 11 by the cutting unit 80.

[0127] Meanwhile, the tape attaching unit 40 according to the present embodiment can be installed to be movable forward and backward with respect to a traveling direction of the electrode connecting film 21 wound on the empty bobbin 11 and in a width direction of the empty bobbin 11.

[0128] For example, after the tape attaching unit 40 is moved forward and backward with respect to the traveling direction of the electrode connecting film 21, the cutting unit 80 connected to the tape attaching unit 40 can cut the wound electrode connecting film 21a a predetermined number of times.

[0129] To this end, the electrode connecting film winding device 1 according to the present application can include the electrode connecting film supply unit 20, the conveying unit 30, the tape attaching unit 40, and a control unit (not shown) for controlling operations of the double-coated tape attaching unit 50.

[0130] The frame body 60 can be provided above the bobbin mounting unit 10. The tape attaching unit 40 and the double-coated tape attaching unit 50 can be movably mounted on the frame body 60. For example, the tape attaching unit 40 and the double-coated tape attaching unit 50 can be installed to be horizontally movable, to be able to descend / ascend (vertically movable), or to be horizontally movable as well as vertically movable along the frame body 60.

[0131] By mounting the tape attaching unit 40 and the double-coated tape attaching unit 50 together on the frame body 60, when the electrode connecting film 21 is supplied to the empty bobbin 11, the tape attaching unit 40 mounted on the frame body 60 can descend to attach an end portion of the electrode connecting film 21 supplied to the empty bobbin 11 to the empty bobbin 11, and then the double-coated tape attaching unit 50 can descend toward the conveying unit 30 to attach the double-coated tape 51 to the electrode connecting film 21.

[0132] The tape attaching unit 40 and the double-coated tape attaching unit 50 mounted on the frame body 60 can be implemented to be movable by a known rail structure, and thus a detailed description thereof will be omitted.

[0133] At this time, the tape attachment unit 40 mounted on the frame body 60 can be configured to rise / fall in the length and width directions and vertical direction of the electrode connection film 21. The double-sided tape attachment unit 50 can be configured to rise / fall in the vertical direction.

[0134] Alternatively, the anti-stick paper peeling unit 70 can also be installed on the frame body 60.

[0135] In the following text, reference will be made to Figure 3 and Figure 4 A method for winding an electrode connection film according to an embodiment of the present invention is described.

[0136] First, an empty bobbin 11 is introduced and installed (S10). That is, the empty bobbin 11, which is in a state before the winding electrode, is introduced into the bobbin mounting unit 10 and installed in the winding machine 13.

[0137] In addition, the empty bobbin 11 is fixed to the winding machine 13 by coupling the clamping member to the empty bobbin 11 installed in the winding machine 13.

[0138] After the empty bobbin 11 is installed in the bobbin mounting unit 10, the electrode connection film supply unit 20 is driven to supply the electrode connection film 21 mounted on the uncoiler 23 to the bobbin 11.

[0139] The electrode connection membrane 21 is conveyed to the bobbin mounting unit 10 via the conveying unit 30. While supported on the first base plate 31a and the second base plate 31b, the electrode connection membrane 21 is conveyed to the bobbin mounting unit 10 by the rotation of each drive roller 33 of the conveying unit 30. At this time, the tension of the electrode connection membrane 21 is adjusted by the movement of the moving roller 35, while the electrode connection membrane 21 is being conveyed.

[0140] The end of the electrode connection membrane 21, which is conveyed by the conveying unit 30, is positioned on the empty tube 11 installed in the tube mounting unit 10 (S20).

[0141] Additionally, tape 41 is attached to the end of electrode connection membrane 21 to fix electrode connection membrane 21 to empty tube 11 (S30).

[0142] In other words, the end of the electrode connection film 21 is positioned on the empty tube 11, and then the tape attachment unit 40 descends toward the empty tube 11. The descending tape attachment unit 40 first attaches a portion of the electrode connection film 21 to the empty tube 11. Thereafter, the tape attachment unit 40 moves horizontally to attach the remaining portion of the electrode connection film 21 to the tube 11, thereby attaching the electrode connection film 21 to the empty tube 11 with tape 41.

[0143] After the electrode connection film 21 is fixed to the empty bobbin 11 with the tape 41, the winding machine 13 is rotated to wind the electrode connection film 21 on the empty bobbin 11 several times (S40).

[0144] When the old roll and the new roll are automatically combined (spliced), the discarded and lost electrodes wound on the old roll are approximately 10 m to 15 m, and thus the electrode connection film 21 wound on the empty bobbin 11 is preferably wound several times so that the electrode connection film is wound about 10 m to 20 m, but the present application is not limited thereto.

[0145] Next, the double-sided tape 51 is attached to the electrode connection film 21 wound on the empty bobbin 11 (S50).

[0146] That is, after the electrode connection film 21 is wound on the empty bobbin 11, the double-sided tape attachment unit 50 provided above the first floor 31a of the conveying unit 30 is lowered to attach the double-sided tape 51 to the electrode connection film 21 on the first floor 31a.

[0147] After the double-sided tape 51 is attached to the electrode connection film 21, the release paper 51a is peeled from the double-sided tape 51 by the release paper peeling unit 70 provided adjacent to the traveling direction of the double-sided tape attachment unit 50 (S60).

[0148] Here, the moving roller 35 adjacent to the first floor 31a moves in the diagonal direction toward the lower portion of the first floor 31a, and the gripper 71 provided at the front end of the release paper peeling unit 70 grips the release paper 51a and peels the release paper 51a from the double-sided tape 51.

[0149] The electrode connection film 21 from which the release paper 51a is peeled moves downward in the diagonal direction along the moving roller 35 and is then conveyed to the bobbin mounting unit 10 while being supported by the second floor 31b.

[0150] Then, the electrode connection film 21 to which the double-sided tape 51 is attached and conveyed to the bobbin mounting unit 10 is cut (S70).

[0151] That is, the electrode connection film 21 from which the release paper 51a is peeled by the release paper peeling unit 70 is continuously conveyed toward the bobbin mounting unit 10, and the double-sided tape 51 attached to the electrode connection film 21 is positioned under the cutting unit 80 provided above the bobbin mounting unit 10. The cutting unit 80 is lowered and cuts the portion of the electrode connection film 21 adjacent to the portion to which the double-sided tape 51 is attached by a cutter unit (not shown).

[0152] The electrode connecting film 21 cut by the cutting unit 80 is wound on the empty bobbin 11. The empty bobbin 11 (on which the electrode connecting film 21 is wound) is unloaded and then moved to a post-process for winding an electrode to manufacture a mother roll. The double-sided tape is positioned at the outermost end of the electrode connecting film wound on the bobbin. When an electrode having a predetermined length is attached to the adhesive surface of the double-sided tape (the release paper is peeled from the adhesive surface) and the electrode is rewound again, the electrode roll is completed.

[0153] As described above, the double-sided tape 51 attached to the electrode connecting film 21 is used to attach the end portion of the electrode when the electrode roll is manufactured by winding the electrode. When the end portion of the electrode is attached to the double-sided tape 51 and the electrode is wound, the electrode can use the end portion of the electrode when the electrode of the new roll and the old roll is combined in a roll-to-roll process, thereby minimizing the electrode loss.

[0154] (Second Embodiment)

[0155] Figure 5 is a schematic view of an electrode connecting film winding apparatus according to another embodiment of the present application. Figure 6 is a process diagram schematically illustrating a process of mounting an electrode connecting film on a bobbin according to another embodiment. Figure 7 is a flowchart illustrating a method of winding an electrode connecting film according to another embodiment of the present application.

[0156] As Figure 5 As shown in FIG. 1, the electrode connecting film winding apparatus 1 according to the present embodiment further includes a final processing adhesive attachment unit 90.

[0157] That is, the final processing adhesive attachment unit 90 is used to fix the electrode connecting film 21 by attaching a final processing adhesive 91 to the cut end portion of the electrode connecting film 21 to prevent the end portion of the electrode connecting film 21 cut by the cutting unit 80 from shaking.

[0158] Here, the final processing adhesive attachment unit 90 is provided below the cutting unit 80 and below the second bottom plate 31b of the conveying unit 30 to fix the electrode connecting film 21 by attaching the final processing adhesive 91 to the cut end portion of the electrode connecting film 21 wound on the empty bobbin 11.

[0159] At this time, the final processing adhesive attachment unit 90 is formed such that a suction member 93 is provided in the final processing adhesive attachment unit 90 to suction the cut end portion of the electrode connecting film 21 conveyed and then attach the final processing adhesive 91.

[0160] As Figure 5 and Figure 6As shown in FIG. 1 1, the cut end portion of the electrode connecting film 21 cut by the cutting unit 80 is sucked by the suction member 93, and the end processing adhesive 91 is attached to the sucked end portion of the electrode connecting film 21.

[0161] Here, about 1 / 2 of the adhesive surface of the end processing adhesive 91 is attached to the lower surface of the cut end portion of the electrode connecting film 21 passing over the first bottom plate 31a. Thereafter, the electrode connecting film 21 continuously conveyed to the bobbin mounting unit 10 is wound on the bobbin while rotating in the rotation direction of the empty bobbin 1 1. The remaining 1 / 2 of the adhesive surface of the end processing adhesive 91 is attached to the surface of the wound end portion of the electrode connecting film 21 or the portion of the electrode connecting film facing or overlapping the wound end portion, thereby fixing the cut end portion of the electrode connecting film 21.

[0162] Accordingly, it is possible to prevent the electrode connecting film 21 wound on the empty bobbin 1 1 from unwinding. In addition, even when the bobbin is moved to the post-processing, it is possible to prevent the electrode connecting film 21 wound on the bobbin 1 1 from unwinding.

[0163] The end processing adhesive attaching unit 90 can be movable in the width direction of the bobbin 1 1. The end processing adhesive attaching unit 90 can attach the end processing adhesive 91 to each of the cut end portion of the electrode connecting film 21 and a plurality of points of the electrode connecting film 21 wound on the empty bobbin 1 1 while being movable in the width direction of the electrode connecting film 21.

[0164] As shown in FIG. 1 1, the cut end portion of the electrode connecting film 21 cut by the cutting unit 80 is sucked by the suction member 93, and the end processing adhesive 91 is attached to the sucked end portion of the electrode connecting film 21. Figure 6 and Figure 7 As shown in FIG. 1 1, the cut end portion of the electrode connecting film 21 cut by the cutting unit 80 is sucked by the suction member 93, and the end processing adhesive 91 is attached to the sucked end portion of the electrode connecting film 21.

[0165] As described above, by attaching the end processing adhesive 91 to the end portion of the electrode connecting film 21 by the end processing adhesive attaching unit 90, it is possible to prevent the cut end portion of the electrode connecting film 21 from fluttering. In addition, when the empty bobbin 1 1 to which the electrode connecting film 21 is attached is moved to the post-processing for winding the electrode, the electrode connecting film 21 can be maintained in a fixed state.

[0166] According to the electrode connecting film winding device and the winding method of the present application, the following electrode roll can be manufactured.

[0167] According to the present application, instead of the electrode roll in which the end of the electrode is directly connected to the bobbin in the related art, an electrode roll in which an electrode connecting film is first connected to the bobbin and the electrode is connected to the electrode connecting film and wound can be manufactured. That is, as shown in Figure 3 The electrode roll according to another aspect of the present application includes an empty bobbin 11, an electrode connecting film 21 wound along the circumference of the empty bobbin 11, a double-sided tape 51 attached to the outermost end of the electrode connecting film 21 wound along the circumference of the empty bobbin 11, and an electrode (not shown) connected to the double-sided tape and wound along the circumference of the bobbin on the outside of the electrode connecting film 21.

[0168] The electrode roll can include a tape for bonding the empty bobbin 11 to the winding start end of the electrode connecting film 21. That is, by directly attaching the winding start end of the electrode connecting film 21 to the empty bobbin 11 with the tape, the winding start end of the electrode connecting film 21 can be fixed to the empty bobbin 11.

[0169] The electrode connecting film 21 can employ a film made of a flexible material capable of absorbing tension to alleviate stress. When the film made of such a material is connected to the electrode, a problem of damaging the connection portion due to local tension concentration can be prevented. Examples of such a film include polyethylene terephthalate (PET), polyethylene naphthalate (PEN), oriented polypropylene (OPP), polyimide (PI), polybutylene terephthalate (PBT), polyester, polyacetal, polyamide, polyethersulfone, polyphenylene ether, polyphenylene sulfide, polyvinyl naphthalene, flexible silicone, and the like.

[0170] The thickness of the electrode connecting film 21 can be determined in consideration of the material and physical properties.

[0171] The tape can be an OPP tape. However, the tape is not limited thereto, and any tape known in the art can be used as the tape. For example, a tape coated with a predetermined adhesive, such as an acrylic-based adhesive applied to a film paper such as paper or synthetic resin, can be used as the tape.

[0172] The electrode connecting film is positioned at the winding start portion of the electrode roll of the present application, the electrode connecting film is wound on the bobbin, and the electrode roll is wound on the outer circumference of the electrode connecting film. Accordingly, when the electrodes of the old roll and the electrodes of the new roll are spliced and the electrodes of the old roll are cut, the electrodes of the old roll can be used for the end portion. That is, when the end portion of the electrode connected to the electrode connecting film of the old roll is bonded to the electrode of the new roll and cut, there is almost no discarded electrode portion in the old roll. Conventionally, since the electrode is wound on the bobbin from the start end portion, but when the electrode is spliced, it is inevitable that a portion of the electrode is discarded from the old roll.

[0173] In addition, the old roll having the cut electrode can be subsequently spliced with the remaining electrode connection film to manufacture a new electrode roll. As described above, the electrode roll of the present application has a structure capable of preventing electrode loss and easily manufacturing a new electrode roll by using the electrode connection film, thus having excellent economic performance and low manufacturing cost.

[0174] While the application has been shown and described with reference to certain embodiments thereof, it will be understood by those skilled in the art that various changes in form and details can be made therein without departing from the spirit and scope of the application as set forth in the appended claims.

Claims

1. An electrode connection film winding device, comprising: A tube mounting unit, in which a tube is mounted; A membrane supply unit configured to supply an electrode-connected membrane to the tube; A conveying unit configured to convey the electrode connection membrane mounted in the membrane supply unit to the tube mounting unit; A tape attachment unit is mounted above the tube mounting unit and configured to attach the end of the electrode connection membrane pulled out from the conveying unit to the tube. A double-sided tape attachment unit, the double-sided tape attachment unit being configured to attach a double-sided tape to the electrode connection film wound on the bobbin; and The frame body, the tape attachment unit and the double-sided tape attachment unit are movably mounted on the frame body.

2. The electrode connection film winding device according to claim 1, wherein the tube mounting unit comprises: A winding machine configured to wind the electrode connection film by rotating the bobbin; and a clamping member configured to secure the bobbin, which is mounted in the winding machine.

3. The electrode connection film winding device according to claim 1, wherein... The tape attachment unit is mounted to be horizontally movable in the width direction of the tube, and The tape attachment unit fixes the electrode connection membrane to the tube by attaching the tape to the end of the electrode connection membrane while moving the tube in the width direction.

4. The electrode connection film winding apparatus according to claim 3, comprising a cutting unit connected to the tape attachment unit and configured to cut the electrode connection film, wherein the double-sided tape is attached to the electrode connection film via the double-sided tape attachment unit.

5. The electrode connection film winding apparatus of claim 4, comprising a final processing adhesive attachment unit provided below the cutting unit, and the final processing adhesive attachment unit being configured to secure the electrode connection film by attaching a final processing adhesive to a cut end of the electrode connection film.

6. The electrode connection film winding apparatus according to claim 1, wherein the double-sided tape attachment unit is mounted above the conveying unit and is vertically movable.

7. The electrode connection film winding apparatus according to claim 1, comprising an anti-adhesion paper peeling unit configured to peel anti-adhesion paper from the double-sided tape attached to the electrode connection film.

8. The electrode connection film winding apparatus according to claim 1, wherein the conveying unit comprises: One or more base plates, the one or more base plates being configured to support the electrode connection membrane being transported; One or more drive rollers configured to convey the electrode connection film; and a movable roller, which is movably mounted to maintain the tension of the electrode connection membrane being conveyed.

9. A method for winding an electrode connection film, comprising: Introduce and install the bobbin; Position the end of the electrode connecting membrane onto the tube; The electrode connection membrane is fixed to the tube by attaching tape to the end of the electrode connection membrane; The electrode connection membrane is wound around the tube by rotating the tube. The double-sided tape is attached to the electrode connection membrane wound on the tube; and The electrode connection film is cut, and the double-sided tape is attached to the electrode connection film.

10. The method of claim 9, further comprising: After attaching the double-sided tape to the electrode connection film, peel off the release paper from the double-sided tape.

11. The method of claim 9, further comprising: After cutting the electrode connection film to which the double-sided tape is attached, the end of the electrode connection film is fixed by attaching a final processed adhesive to the end of the electrode connection film, the end being adjacent to the portion to which the double-sided tape is attached.

12. An electrode roll, comprising: Cylindrical tube; An electrode connection membrane is wound around the circumference of the tube; A double-sided tape is attached to the outermost end of the electrode connection membrane that is wound around the circumference of the tube; and An electrode is connected to the double-sided strip and is wound around the circumference of the tube on the outside of the electrode connection membrane.

13. The electrode roll of claim 12, comprising tape configured to bond the bobbin to the winding start end of the electrode connection membrane.

14. The electrode roll of claim 12, wherein the electrode connection film comprises one of the group consisting of: polyethylene terephthalate (PET), polyethylene naphthalate (PEN), oriented polypropylene (OPP), polyimide (PI), polybutylene terephthalate (PBT), polyester, polyacetal, polyamide, polyethersulfone, polyphenylene ether, polyphenylene sulfide, polyvinyl naphthalene, and flexible silicone resin.

15. The electrode roll according to claim 13, wherein the tape is an oriented polypropylene OPP tape.

Images