Winding device and method for electrode connecting film, and electrode roll

Abstract

The disclosed invention includes a bobbin installation unit in which a bobbin is installed, a film supplying unit which supplies an electrode connecting film to the bobbin, a transfer unit which transfers the electrode connecting film installed in the film supplying unit to the bobbin installation unit, an adhesive tape attachment unit which is installed on an upper portion of the bobbin installation unit and attaches an end of the electrode connecting film drawn out by the transfer unit to the bobbin, a double-sided tape attachment unit which attaches double-sided tape to the electrode connecting film wound around the bobbin, and a frame body on which the adhesive tape attachment unit and double-sided tape attachment unit are movably installed.

Description

[Technical field]

[0001] This application claims the benefit of priority based on Korean Patent Application No. 10-2022-0019068 dated February 14, 2022 and Korean Patent Application No. 10-2023-0013851 dated February 1, 2023, and all contents disclosed in the documents of said Korean patent applications are incorporated herein by reference.

[0002] The present invention relates to a winding device for an electrode connecting film for reducing electrode loss.

[0003] More specifically, the present invention relates to a winding device for an electrode connecting film that can minimize electrode loss that occurs when connecting electrodes during a roll-to-roll process by placing and winding an electrode connecting film on an empty bobbin and connecting electrodes to the electrode connecting film.

[0004] The present invention also relates to a method for winding an electrode connecting film to reduce electrode loss.

[0005] The present invention also relates to an electrode roll provided with an electrode connecting film. [Background technology]

[0006] 2. Description of the Related Art In recent years, secondary batteries that are capable of being charged and discharged have come to be widely used as energy sources for wireless mobile devices.

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

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

[0009] Such secondary batteries are classified into lithium ion batteries, lithium ion polymer batteries, lithium polymer batteries, etc. depending on the configuration of the electrodes and electrolyte. The use of lithium ion polymer batteries, which are less likely to leak electrolyte and are easy to manufacture, is increasing.

[0010] Generally, secondary batteries are classified according to the shape of the battery case into cylindrical batteries and prismatic batteries in which the electrode assembly is housed in a cylindrical or prismatic metal can, and pouch-type batteries in which the electrode assembly is housed in a pouch-type case made of an aluminum laminate sheet.

[0011] The electrode assembly built into the battery case is a power generating element that is capable of charging and discharging and has a structure in which a positive electrode, a negative electrode, and a separator are interposed between the positive and negative electrodes. There are two types: a jelly roll type in which a long sheet-like positive electrode and a negative electrode coated with an active material are wound up with a separator interposed between them, and a stack type in which a number of positive electrodes and negative electrodes formed to a predetermined size are stacked in sequence with a separator interposed between them.

[0012] Here, electric vehicles and the like require a large number of battery modules since they use high-output electric energy, and such battery modules have a large number of battery cells connected in series or parallel inside.

[0013] Meanwhile, the electrode completed in the electrode coating process may be wound around an empty bobbin and sequentially transferred to a subsequent process such as a roll press process and a slitter process.

[0014] When winding electrodes onto a bobbin to produce an electrode roll (jumbo roll), first, double-sided tape is wound around and attached to an empty bobbin. Next, adhesive tape (e.g., OPP (Oriented Polypropylene) tape) is attached onto the double-sided tape wound around the bobbin. The adhesive tape is attached directly onto the empty bobbin by a worker, with the adhesive side exposed toward the electrode to be wound and the non-adhesive side facing the double-sided tape.

[0015] In this manner, one end of the electrode is attached to the adhesive surface of the pre-processed adhesive tape, and then the tape is wound up to produce an electrode roll.

[0016] In this manner, conventionally, an electrode roll is produced by winding and attaching double-sided tape to a bobbin, attaching an adhesive tape onto the double-sided tape, and then attaching an electrode to the adhesive surface of the adhesive tape.

[0017] Such an electrode roll is mounted on an unwinder of a roll press device for a subsequent operation (e.g., a roll press operation). The end of the electrode roll is unwound toward the rewinder and moves roll-to-roll between the unwinder and the rewinder. During this process, a predetermined operation (e.g., a roll press operation) is performed. When the electrode roll on the unwinder is almost completely unwound, a splicing operation is performed in which the end of a new electrode roll is connected to the electrode end of the electrode roll that has almost finished being used.

[0018] An electrode roll with only a small amount of electrode remaining is called an old roll, and a newly inserted electrode roll is called a new roll. The new roll and the old roll are automatically spliced ​​together (auto splicing).

[0019] At this time, the old roll and / or new roll rotate, and the electrodes of the old roll and new roll are automatically joined. The roll press operation continues for the electrodes of the automatically joined new roll, and after joining, they are cut and the electrodes remaining on the old roll are discarded.

[0020] Here, the electrode end of the old roll is attached to the adhesive tape on the bobbin and cannot be used, which causes a problem of electrode loss in the area between the part attached to the adhesive tape and the cutting section.

[0021] Furthermore, since the above preparatory work is also performed manually, there is a problem that work efficiency is reduced and safety accidents may occur. [Prior art documents] [Patent documents]

[0022] [Patent Document 1] Korean Patent No. 10-1617954 Summary of the Invention [Problem to be solved by the invention]

[0023] The present invention has been made to solve the above-mentioned problems, and has an object to provide a winding device for an electrode connecting film and a winding method for an electrode connecting film, which can minimize electrode loss that occurs when connecting electrodes in a roll press process by placing an electrode connecting film on a bobbin, connecting electrodes to the electrode connecting film, and winding the film.

[0024] Another object of the present invention is to provide a winding device and a winding method for an electrode connecting film, which can prevent electrode loss and quality defects by replacing lost portions of the electrodes with the electrode connecting film.

[0025] Another object of the present invention is to provide an electrode roll having a structure capable of connecting the electrodes of a new roll and an old roll so as to prevent loss of the electrodes. [Means for solving the problem]

[0026] In order to achieve the above objects, the present invention is characterized by including a bobbin installation unit in which a bobbin is installed, a film supplying unit which supplies an electrode connecting film to the bobbin, a transporting unit which transports the electrode connecting film installed in the film supplying unit to the bobbin installation unit, an adhesive tape attachment unit which is installed on an upper portion of the bobbin installation unit and attaches an end of the electrode connecting film drawn out by the transporting unit to the bobbin, a double-sided tape attachment unit which attaches double-sided tape to the electrode connecting film wound around the bobbin, and a frame body on which the adhesive tape attachment unit and the double-sided tape attachment unit are movably installed.

[0027] The bobbin installation unit may include a winder that rotates a bobbin to wind up the electrode connecting film, and a chucking member that fixes the bobbin installed on the winder.

[0028] The adhesive tape attachment unit is installed so as to be horizontally movable in the width direction of the bobbin, and while the adhesive tape attachment unit moves in the width direction of the bobbin, it can attach an adhesive tape to an end of the electrode connecting film, thereby fixing the electrode connecting film onto the bobbin.

[0029] The electrode connecting film winding device may include a cutting unit connected to the adhesive tape attaching unit and configured to cut the electrode connecting film to which the double-sided tape is attached by the double-sided tape attaching unit.

[0030] The electrode connecting film winding device may include a finishing sticker attachment unit that is provided below the cutting unit and attaches a finishing sticker to the cut end of the electrode connecting film to fix the electrode connecting film.

[0031] The double-sided tape attachment unit may be installed on the upper part of the transfer unit so as to be movable up and down.

[0032] The electrode connecting film winding device may include a release paper peeling unit that peels off the release paper from the double-sided tape attached to the electrode connecting film.

[0033] The transport unit may include at least one base plate supporting the electrode connecting film to be transported, at least one drive roller to transport the electrode connecting film, and a moving roller movably installed to maintain tension of the electrode connecting film to be transported.

[0034] In another aspect of the present invention, a method for winding an electrode connecting film may include the steps of inserting and installing a bobbin, positioning an end of the electrode connecting film on the bobbin, attaching an adhesive tape to the end of the electrode connecting film to fix the electrode connecting film to the bobbin, rotating the bobbin to wind the electrode connecting film onto the bobbin, attaching double-sided tape to the electrode connecting film wound onto the bobbin, and cutting the electrode connecting film with the double-sided tape attached.

[0035] The method may further include peeling off the release paper from the double-sided tape after the step of attaching the double-sided tape to the electrode connecting film.

[0036] After the step of cutting the electrode connecting film to which the double-sided tape is attached, the method may further include the step of attaching a finishing sticker to an end of the electrode connecting film adjacent to the portion to which the double-sided tape is attached, thereby fixing the end of the electrode connecting film.

[0037] In another aspect of the present invention, an electrode roll may include a bobbin, an electrode connecting film wound around the bobbin, double-sided tape attached to an outermost end of the wound electrode connecting film, and an electrode connected to the double-sided tape and wound around the bobbin outside the electrode connecting film.

[0038] The electrode roll may include an adhesive tape that bonds a winding start end of the electrode connecting film to the bobbin.

[0039] The electrode connecting film may be one selected from the group consisting of polyethylene terephthalate (PET), polyethylene naphthalate (PEN), oriented polypropylene (OPP), polyimide (PI), polybutylene terephthalate (PBT), polyester, polyacetal, polyamide, polyethersulfone, polyphenyleneoxide, polyphenylenesulfide, polyethylenenaphthalene, and flexible silicone.

[0040] The adhesive tape may be an OPP (Oriented Polypropylene) tape. Effect of the Invention

[0041] According to the present invention, an electrode connecting film is placed on a bobbin, and then an electrode is wound around the electrode connecting film, thereby minimizing the amount of electrodes remaining on the electrode roll and being discarded during automatic bonding of electrodes in a roll-to-roll process, and preventing electrode loss.

[0042] In addition, by replacing the loss of the electrodes with the electrode connecting film, the loss of the electrodes can be minimized and quality defects can be prevented.

[0043] Furthermore, the preparatory work that previously relied on manual labor can be automated, simplifying the work process and reducing the burden on workers. [Brief description of the drawings]

[0044] [Figure 1] 1 is a schematic diagram of a winding device for an electrode connecting film according to an embodiment of the present invention. [Diagram 2]4 is a view illustrating a state in which a release paper is peeled off from a double-sided tape by a release paper peeling unit of a winding device for an electrode connecting film according to an embodiment of the present invention. [Diagram 3] 11 is a process diagram illustrating a process of installing an electrode connecting film on a bobbin; [Figure 4] 4 is a flowchart showing a method for winding an electrode connecting film according to an embodiment of the present invention. [Diagram 5] 11 is a schematic view of a winding device for an electrode connecting film according to another embodiment of the present invention. FIG. [Figure 6] 11 is a process diagram illustrating a process of installing an electrode connecting film on a bobbin according to another embodiment. [Figure 7] 5 is a flowchart showing a method for winding an electrode connecting film according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0045] The present invention provides a winding device for an electrode connecting film, the device including a bobbin installation unit in which a bobbin is installed, a film supplying unit which supplies an electrode connecting film to the bobbin, a transporting unit which transports the electrode connecting film installed in the film supplying unit to the bobbin installation unit, an adhesive tape attachment unit which is installed on an upper portion of the bobbin installation unit and which attaches an end of the electrode connecting film drawn out by the transporting unit to the bobbin, a double-sided tape attachment unit which attaches double-sided tape to the electrode connecting film wound around the bobbin, and a frame body on which the adhesive tape attachment unit and the double-sided tape attachment unit are movably installed.

[0046] The present invention also provides a method for winding an electrode connecting film, the method including: inserting and installing a bobbin; positioning an end of an electrode connecting film on the bobbin; attaching an adhesive tape to the end of the electrode connecting film to fix the electrode connecting film to the bobbin; rotating the bobbin to wind the electrode connecting film onto the bobbin; attaching a double-sided tape to the electrode connecting film wound onto the bobbin; and cutting the electrode connecting film with the double-sided tape attached.

[0047] The present invention also provides an electrode roll including a bobbin, an electrode connecting film wound around the bobbin, a double-sided tape attached to an outermost end of the wound electrode connecting film, and an electrode connected to the double-sided tape and wound around the bobbin outside the electrode connecting film.

[0048] The present invention will be described in detail below. Before that, the terms and words used in the specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings, but should be interpreted as meanings and concepts that are consistent with the technical idea of ​​the present invention, based on the principle that the inventor can appropriately define the concepts of the terms in order to best describe his own invention.

[0049] As used throughout the present specification, terms such as "comprise" and "have" are intended to specify the presence of features, numbers, steps, operations, components, parts, or combinations thereof set forth in the specification, but are understood as not precluding the presence or additional possibility of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0050] Furthermore, when a layer, film, region, plate, or other part is described as being "on" another part, this includes not only the case where it is "directly on" the other part, but also the case where there is another part in between. Conversely, when a layer, film, region, plate, or other part is described as being "under" another part, this includes not only the case where it is "directly under" the other part, but also the case where there is another part in between. Furthermore, in the specification of the present invention, being "on" can include not only the case where it is located at the top, but also the case where it is located at the bottom.

[0051] (First embodiment) Fig. 1 is a schematic diagram of a winding device for an electrode connecting film according to one embodiment of the present invention. Fig. 2 is a diagram illustrating the release paper peeling off from a double-sided tape by a release paper peeling unit of the winding device for an electrode connecting film according to one embodiment of the present invention. Fig. 3 is a process diagram illustrating the process of placing an electrode connecting film on a bobbin. Fig. 4 is a flowchart showing a winding method for an electrode connecting film according to one embodiment of the present invention.

[0052] As shown in FIG. 1, a winding device 1 for an electrode connecting film according to one embodiment of the present invention includes a bobbin installation unit 10, an electrode connecting film supply unit 20, a transport unit 30, an adhesive tape attachment unit 40, a double-sided tape attachment unit 50, and a frame body 60.

[0053] The bobbin installation unit 10 is for installing an empty bobbin 11 before an electrode is wound thereon.

[0054] For this purpose, the bobbin installation unit 10 includes a winding machine 13 that rotates the empty bobbin 11 and winds up the electrode connecting film 21, and a chucking member (not shown) that fixes the empty bobbin 11 installed on the winding machine 13.

[0055] The winder 13 is coupled to both ends of the bobbin 11 and rotates the bobbin 11. The chucking member can chuck the edge of the bobbin 11 coupled to the winder 13 to fix the empty bobbin 11 to the winder 13.

[0056] The winding machine 13 that rotates the bobbin 11 and the chucking member that fixes the bobbin 11 to the winding machine 13 are of known configuration, and therefore detailed description thereof will be omitted below.

[0057] The electrode connecting film supplying unit 20 is disposed adjacent to the bobbin setting unit 10 and supplies the electrode connecting film 21 to the bobbin 11 .

[0058] For this purpose, the electrode connecting film supply unit 20 is provided with an unwinder 23 for placing the rolled electrode connecting film 21, and the unwinder 23 may have a cantilever structure.

[0059] The unwinder 23 may be partially fixed to prevent bending due to the weight of the electrode connecting film 21 .

[0060] The electrode connecting film 21 placed on the unwinder 23 is supplied to the bobbin 11 of the bobbin installation unit 10 .

[0061] With the above-described structure, when the electrode connecting film supply unit 20 supplies the electrode connecting film 21 to the bobbin installation unit 10, the bobbin 11 is rotated by driving the winding machine 13, and the electrode connecting film 21 is wound onto an empty bobbin 11.

[0062] The transferring unit 30 transfers the electrode connecting film 21 installed in the electrode connecting film supplying unit 20 to the bobbin installing unit 10. That is, the transferring unit 30 serves to transfer the electrode connecting film 21 supplied from the electrode connecting film supplying unit 20 to the bobbin 11 of the bobbin installing unit 10.

[0063] As shown in FIG. 2, the transport unit 30 includes a base plate 31, a driving roller 33 that rotates to transport the electrode connecting film 21, and a moving roller 35.

[0064] The base plate 31 may be formed in a flat plate shape, and at least one may be provided. The base plate 31 supports the electrode connecting film drawn out from the electrode connecting film supply unit 20, and also serves as a work table when attaching or cutting a tape onto the electrode connecting film 21.

[0065] The base plate 31 may include a first base plate 31 a disposed adjacent to the electrode connecting film supply unit 20 and a second base plate 31 b disposed adjacent to the bobbin 11 .

[0066] At least one driving roller 33 is provided adjacent to the base plate 31, and the electrode connecting film is transferred to the bobbin installation unit 10 side while being supported by the base plate 31 by the rotation of the driving roller 33.

[0067] The movable roller 35 is for maintaining a constant tension on the electrode connecting film 21 drawn out from the electrode connecting film supply unit 20, and rotates to transport the electrode connecting film 21 toward the bobbin installation unit 10, and is movably installed so that its position can be adjusted in response to the tension acting on the electrode connecting film 21.

[0068] The moving roller 35 can maintain tension when cutting, taping, and finishing the electrode connecting film 21 drawn from the electrode connecting film supply unit 20. When the electrode connecting film 21, which is transported by the driving roller 33, is cut, taped, and finished on the base plate 31, the process can be performed in a state where the moving roller 35 moves and maintains tension.

[0069] The adhesive tape attachment unit 40 is installed on the upper part of the bobbin installation unit 10. Preferably, the adhesive tape attachment unit 40 is installed on the upper part of the bobbin installation unit 10 so as to be movable up and down. The adhesive tape attachment unit 40 attaches an end of the electrode connecting film 21, which is drawn out from the electrode connecting film supply unit 20 via the transfer unit 30, to the bobbin 11.

[0070] A roll of adhesive tape 41 is placed in the adhesive tape attachment unit 40 , and the placed adhesive tape 41 is supplied to the bobbin 11 .

[0071] The adhesive tape attachment unit 40 is installed so as to be horizontally movable in the width direction of the bobbin 11. Therefore, the adhesive tape attachment unit 40 attaches the adhesive tape to the end of the electrode connecting film 21 while moving along the width direction of the bobbin 11. As a result, the electrode connecting film 21 is fixed onto the bobbin by the adhesive tape.

[0072] Specifically, the adhesive tape attachment unit 40 descends toward the bobbin 11 installed on the bobbin installation unit 10 and attaches the adhesive tape 41 so that the adhesive tape 41 covers the ends of the bobbin 11 and the electrode connecting film 21. First, the adhesive tape 41 is attached to one widthwise side of the bobbin, and then the adhesive tape attachment unit 40 moves horizontally toward the other widthwise side of the bobbin 11 to attach the adhesive tape 41, thereby fixing the electrode connecting film 21 onto the bobbin 11.

[0073] After attaching the adhesive tape 41 along the width direction of the bobbin, the adhesive tape attachment unit 40 returns to the initial position. This process is repeated for the next empty bobbin 11 to be newly installed in the bobbin installation unit 10.

[0074] When the electrode connecting film 21 is fixed onto the bobbin 11, the winder 13 rotates the bobbin a predetermined number of times, and winds up the electrode connecting film 21 onto the bobbin 11 by a predetermined length.

[0075] The double-sided tape attachment unit 50 is disposed adjacent to an upper portion of the transport unit 30 and attaches a double-sided tape 51 to the electrode connecting film 21 wound around the bobbin 11 .

[0076] For this, the double-sided tape attachment unit 50 may be provided on the upper part of the transport unit 30 so as to be movable up and down, and attaches the double-sided tape 51 to the electrode connecting film 21 transported by the transport unit 30 .

[0077] In the double-sided tape attachment unit 50, a roll of double-sided tape 51 having adhesive surfaces on both sides is placed.

[0078] The double-sided tape attachment unit 50 descends toward the electrode connecting film 21, which is drawn out from the electrode connecting film supply unit 20 and transported through the transport unit 30. The descended double-sided tape attachment unit 50 attaches the double-sided tape 51 onto the electrode connecting film 21, and then ascends again. This process is repeated for the next empty bobbin 11 that is newly installed in the bobbin installation unit 10.

[0079] In one embodiment of the present invention, the double-sided tape attachment unit 50 is provided to be capable of ascending and descending vertically, but the double-sided tape attachment unit 50 may be installed to be capable of moving horizontally in the width direction of the electrode connecting film 21. In this case, the double-sided tape attachment unit 50 may attach the double-sided tape 51 to the electrode connecting film 21 while moving in the width direction. In addition, various other design modifications are possible, such as the double-sided tape attachment unit 50 moving vertically and horizontally.

[0080] Meanwhile, the winding device 1 for an electrode connecting film according to one embodiment of the present invention may further include a release paper peeling unit 70. The release paper peeling unit 70 is disposed adjacent to the double-sided tape attaching unit 50, and may peel off the release paper 51a from the double-sided tape 51 attached to the electrode connecting film 21.

[0081] For this purpose, the release paper peeling unit 70 may include a gripper 71 for gripping the release paper 51a.

[0082] The electrode connecting film 21 drawn out by the transport unit 30 may have a double-sided tape 51 attached to it via a double-sided tape attaching unit 50 on the second base plate 31b of the transport unit 30. In addition, the electrode connecting film 21 with the double-sided tape 51 attached thereto continues to move due to the rotation of each driving roller 33, and the release paper 51a attached to the double-sided tape 51 is removed via a release paper peeling unit 70.

[0083] 2, after the double-sided tape 51 is attached to the electrode connecting film 21, the moving roller 35 provided adjacent to the first base plate 31a moves in an oblique direction toward the lower part of the first base plate 31a, and at this time, the gripper 71 provided at the tip of the release paper peeling unit 70 may grip the release paper 51a and then peel the release paper 51a from the double-sided tape 51. After the release paper 51a is peeled off, the moving roller 35 may move again in an oblique direction to return to its original position.

[0084] In one embodiment of the present invention, the release paper peeling unit 70 includes a gripper 71, but it is also possible that the release paper peeling unit 70 is provided with a suction unit (not shown) so that the release paper 51a is peeled off from the double-sided tape 51 using a suction force.

[0085] The electrode connecting film winding device 1 according to an embodiment of the present invention further includes a cutting unit 80 for cutting the electrode connecting film 21. The cutting unit 80 may be connected to the adhesive tape attaching unit 40. The cutting unit 80 cuts the electrode connecting film 21 with the double-sided tape 51 attached to a suitable length.

[0086] In this manner, the electrode connecting film 21 with the double-sided tape 51 attached to the bobbin 11 is cut by the cutting unit 80.

[0087] Meanwhile, the adhesive tape attachment unit 40 according to this embodiment can be installed to be movable forward and backward not only in the width direction of the bobbin 11 but also in the traveling direction of the electrode connecting film 21 wound around the bobbin 11 .

[0088] For example, after the adhesive tape attachment unit 40 moves forward and backward in the traveling direction of the electrode connecting film 21, the cutting unit 80 connected to the adhesive tape attachment unit 40 can cut the wound electrode connecting film 21 a certain number of times.

[0089] To this end, the electrode connecting film winding device 1 according to the present invention may include a control unit (not shown) for controlling the operations of the electrode connecting film supply unit 20, the transport unit 30, the adhesive tape attachment unit 40, the double-sided tape attachment unit 50, etc.

[0090] The frame body 60 may be provided on the upper part of the bobbin installation unit 10. The adhesive tape attachment unit 40 and the double-sided tape attachment unit 50 may be movably installed on the frame body 60. For example, the adhesive tape attachment unit 40 and the double-sided tape attachment unit 50 may be installed so as to be capable of horizontal movement, vertical movement, or both horizontal and vertical movement along the frame body 60.

[0091] Since the adhesive tape attachment unit 40 and the double-sided tape attachment unit 50 are both installed on the frame body 60, when the electrode connecting film 21 is supplied to the bobbin 11, the adhesive tape attachment unit 40 installed on the frame body 60 descends to attach the end of the electrode connecting film 21 supplied to the bobbin 11 to the bobbin 11, and then the double-sided tape attachment unit 50 descends toward the transfer unit 30 to attach the double-sided tape 51 to the electrode connecting film 21.

[0092] The adhesive tape attachment unit 40 and the double-sided tape attachment unit 50 installed on the frame body 60 may be movably implemented using a known rail structure, and therefore detailed description thereof will be omitted.

[0093] At this time, the adhesive tape attachment unit 40 installed on the frame body 60 may be configured to be able to move up and down in the lengthwise direction, widthwise direction and vertical direction of the electrode connecting film 21. The double-sided tape attachment unit 50 may be configured to be able to move up and down in the vertical direction.

[0094] Further, a release paper peeling unit 70 may also be installed on the frame body 60 .

[0095] Hereinafter, a method for winding an electrode connecting film according to one embodiment of the present invention will be described with reference to FIGS.

[0096] First, an empty bobbin 11 is loaded and set (S10). That is, the bobbin 11 before an electrode is wound thereon is loaded into the bobbin setting unit 10 and set on the winder 13.

[0097] Then, a chucking member is fastened to the bobbin 11 placed on the winding machine 13 to fix the bobbin 11 to the winding machine 13.

[0098] After the bobbin 11 is placed on the bobbin placing unit 10 , the electrode connecting film supplying unit 20 is driven to supply the electrode connecting film 21 placed on the unwinder 23 onto the bobbin 11 .

[0099] The electrode connecting film 21 is transferred to the bobbin installing unit 10 via the transferring unit 30. The electrode connecting film 21 is transferred to the bobbin installing unit 10 while being supported on the first base plate 31a and the second base plate 31b by the rotation of each driving roller 33 of the transferring unit 30. At this time, the electrode connecting film 21 is transferred while the tension of the electrode connecting film 21 is adjusted by the movement of the moving roller 35.

[0100] An end of the electrode connecting film 21 transferred via the transfer unit 30 is positioned on the empty bobbin 11 installed in the bobbin installation unit 10 (S20).

[0101] Then, adhesive tape 41 is attached to the end of the electrode connecting film 21, and the electrode connecting film 21 is fixed to an empty bobbin 11 (S30).

[0102] That is, after the end of the electrode connecting film 21 is positioned on the bobbin 11, the adhesive tape attachment unit 40 descends toward the bobbin 11. The descended adhesive tape attachment unit 40 first attaches a portion of the electrode connecting film 21 onto the bobbin 11. Then, the adhesive tape attachment unit 40 moves horizontally to attach the remaining portion of the electrode connecting film 21 to the bobbin 11, thereby attaching the electrode connecting film 21 to the bobbin 11 with the adhesive tape 41.

[0103] After the electrode connecting film 21 is fixed to the bobbin 11 with the adhesive tape 41, the winding machine 13 is rotated to wind the electrode connecting film 21 multiple times around the bobbin 11 (S40).

[0104] When the old roll and the new roll are automatically joined (spliced), the electrode wound on the old roll that is discarded and lost is about 10 to 15 m, so it is preferable that the electrode connecting film 21 wound onto the bobbin 11 is also wound multiple times so that it is about 10 to 20 m long, but this is not limited to this.

[0105] Next, double-sided tape 51 is attached to electrode connecting film 21 wound around bobbin 11 (S50).

[0106] That is, after the electrode connecting film 21 is wound onto the bobbin 11, the double-sided tape attachment unit 50 provided on the upper part of the first base plate 31a of the transport unit 30 descends to attach the double-sided tape 51 to the electrode connecting film 21 on the first base plate 31a.

[0107] After the double-sided tape 51 has been attached to the electrode connecting film 21, the release paper 51a is peeled off from the double-sided tape 51 by a release paper peeling unit 70 arranged adjacent to the traveling direction of the double-sided tape attaching unit 50 (S60).

[0108] Here, the moving roller 35 adjacent to the first base plate 31a moves diagonally toward the lower part of the first base plate 31a, and at this time, the gripper 71 provided at the tip of the release paper peeling unit 70 grips the release paper 51a and peels it off from the double-sided tape 51.

[0109] The electrode connecting film 21 from which the release paper 51a has been peeled off moves diagonally downward along the moving rollers 35, and is then transferred to the bobbin installation unit 10 while being supported again by the second base plate 31b.

[0110] Then, the electrode connecting film 21 with the double-sided tape 51 attached thereto, which is transferred to the bobbin installation unit 10, is cut (S70).

[0111] That is, the electrode connecting film 21 from which the release paper 51a has been peeled off by the release paper peeling unit 70 continues to be transported towards the bobbin installing unit 10, and the double-sided tape 51 attached to the electrode connecting film 21 is positioned below the cutting unit 80 provided at the top of the bobbin installing unit 10. The cutting unit 80 descends and cuts a portion of the electrode connecting film 21 adjacent to the portion to which the double-sided tape 51 is attached using a cutter unit (not shown).

[0112] The electrode connecting film 21 cut by the cutting unit 80 is wound onto the bobbin 11. The bobbin 11 on which the electrode connecting film 21 is wound is unloaded and then moved to a post-process for winding up the electrodes to manufacture a jumbo roll. The double-sided tape is located at the outermost end of the electrode connecting film wound onto the bobbin. A predetermined length of electrode is attached to the adhesive surface of the double-sided tape from which the release paper has been peeled off, and the electrode is wound up again to complete the electrode roll.

[0113] In this manner, the double-sided tape 51 attached to the electrode connecting film 21 is for attaching the ends of the electrodes when the electrodes are wound up to manufacture an electrode roll. When the ends of the electrodes are attached to the double-sided tape 51 and the electrodes are wound up, the electrodes can be used to the end when joining the electrodes of the old roll and the new roll in the roll-to-roll process, so that loss of the electrodes can be minimized.

[0114] Second embodiment Fig. 5 is a schematic diagram of a winding device for an electrode connecting film according to another embodiment of the present invention. Fig. 6 is a process diagram showing a process of installing an electrode connecting film on a bobbin according to another embodiment. Fig. 7 is a flowchart showing a winding method for an electrode connecting film according to another embodiment of the present invention.

[0115] As shown in FIG. 5, the electrode connecting film winding device 1 ′ according to the present embodiment further includes a finishing sticker attaching unit 90 .

[0116] That is, the finishing sticker attachment unit 90 is for attaching a finishing sticker 91 to the cut end of the electrode connecting film 21 to fix the electrode connecting film 21 in order to prevent the end of the electrode connecting film 21 cut by the cutting unit 80 from flapping.

[0117] Here, the finishing sticker attachment unit 90 is provided below the cutting unit 80 and below the second base plate 31b of the transport unit 30, and attaches a finishing sticker 91 to the cut end of the electrode connecting film 21 wound around the bobbin 11, thereby fixing the electrode connecting film 21.

[0118] At this time, the finishing sticker attaching unit 90 is provided with a suction member 93, which sucks in the cut end of the electrode connecting film 21 being transferred and then attaches the finishing sticker 91 thereto.

[0119] As shown in Figures 5 and 6, the cut end of the electrode connecting film 21 cut by the cutting unit 80 is sucked into the suction member 93, and then a finishing sticker 91 is attached to the sucked end of the electrode connecting film 21.

[0120] At this time, about half of the adhesive surface of the finishing sticker 91 is attached to the lower surface of the cut end of the electrode connecting film 21 passing through the first base plate 31a. Thereafter, the electrode connecting film 21 continuously transferred to the bobbin installation unit 10 is wound around the bobbin while rotating in the rotation direction of the bobbin 11. About half of the remaining adhesive surface of the finishing sticker 91 is attached to the surface of the electrode connecting film portion that faces or overlaps with the wound end of the electrode connecting film 21, and the cut end of the electrode connecting film 21 is fixed.

[0121] This can prevent unwinding of the electrode connecting film 21 wound around an empty bobbin 11. Furthermore, even when the bobbin is moved to a subsequent process, the electrode connecting film 21 wound around the bobbin 11 can be prevented from unwinding.

[0122] The finishing sticker attaching unit 90 may move in the width direction of the bobbin 11. The finishing sticker attaching unit 90 may attach finishing stickers 91 to the cut end of the electrode connecting film 21 and to multiple locations of the portion of the electrode connecting film 21 wound around the bobbin 11 while moving in the width direction of the electrode connecting film 21.

[0123] As shown in FIG. 6 and FIG. 7, the method for winding an electrode connecting film around an empty bobbin to reduce electrode loss according to the present embodiment further includes a step S80 of cutting the electrode connecting film 21 with the double-sided tape 51 attached, and then attaching a finishing sticker 91 to an end of the electrode connecting film 21 adjacent to the portion to which the double-sided tape 51 is attached, thereby fixing the end of the electrode connecting film 21 and the electrode connecting film 21 wound around the bobbin 11.

[0124] In this manner, by performing finishing processing by attaching finishing stickers 91 to the ends of the electrode connecting film 21 using the finishing sticker attaching unit 90, it is possible to prevent the ends of the cut electrode connecting film 21 from flapping. In addition, when the bobbin 11 to which the electrode connecting film 21 is attached is moved to a subsequent process for winding up the electrodes, the electrode connecting film 21 can be maintained in a fixed state.

[0125] The above-described electrode connecting film winding device and winding method of the present invention can produce the following electrode roll.

[0126] According to the present invention, an electrode roll can be manufactured in a form in which an electrode connecting film is first connected to a bobbin and then an electrode is connected to the electrode connecting film and wound up, rather than a form in which an end of an electrode is directly connected to a bobbin from the beginning as in the conventional case. That is, as shown in Fig. 3, an electrode roll according to another aspect of the present invention includes a bobbin 11, an electrode connecting film 21 wound around the bobbin, a double-sided tape 51 attached to the outermost end of the wound electrode connecting film, and an electrode (not shown) connected to the double-sided tape and wound around the bobbin outside the electrode connecting film.

[0127] The electrode roll may include an adhesive tape that bonds the winding start end of the electrode connecting film to the bobbin. That is, the start end of the electrode connecting film may be directly bonded onto the bobbin with the adhesive tape, thereby fixing the winding start end of the electrode connecting film onto the bobbin.

[0128] The electrode connecting film 21 may be made of a flexible material capable of absorbing tension and relieving stress. When a film made of such a material is used to connect to an electrode, it is possible to prevent the problem of the connection being damaged due to localized tension concentration. Examples of such films include polyethylene terephthalate (PET), polyethylene naphthalate (PEN), oriented polypropylene (OPP), polyimide (PI), polybutylene terephthalate (PBT), polyester, polyacetal, polyamide, polyethersulfone, polyphenyleneoxide, polyphenylenesulfide, polyethylenenaphthalene, and flexible silicone.

[0129] The thickness of the electrode connecting film 21 can be determined in consideration of the material and physical properties.

[0130] The adhesive tape may be an OPP (Oriented Polypropylene) tape. However, the adhesive tape is not limited to this, and any conventionally known adhesive tape may be used. For example, a tape in which a specific adhesive such as an acrylic adhesive is applied to a film paper such as paper or synthetic resin may be used as the adhesive tape.

[0131] In the electrode roll of the present invention, an electrode connecting film is located at the beginning of the winding onto the bobbin, and the electrode is wound around the outer periphery of the film. Therefore, when the electrode of the old roll is cut after joining the electrode of the old roll to the electrode of the new roll, the electrode of the old roll can be used to the end. In other words, when the end of the electrode connected to the electrode connecting film of the old roll is joined to the electrode of the new roll and then cut, almost no electrode portion is wasted in the old roll. Conventionally, because the electrode was wound onto the bobbin from the beginning, some electrode portion was inevitably wasted in the old roll when the electrode was spliced.

[0132] In addition, a new electrode roll can be manufactured by connecting a new electrode to the remaining electrode connecting film of the old roll from which the electrodes have been cut. In this way, the electrode roll of the present invention has a structure that prevents loss of electrodes and allows a new electrode roll to be easily manufactured using the electrode connecting film, and therefore is economical and can reduce manufacturing costs.

[0133] Although the present invention has been illustrated and described with reference to specific embodiments, it will be readily apparent to anyone skilled in the art that various modifications and variations can be made thereto without departing from the spirit and scope of the invention as set forth in the claims. [Explanation of symbols]

[0134] 1, 1': Winding device for electrode connecting film 10: Bobbin installation unit 11: Bobbin 13: Winder 20: Electrode connection film supply unit 21: Electrode connection film 23: Unwinder 30:Transport unit 31: Base plate 31a: First base plate 31b: Second base plate 33: Drive roller 35: Moving roller 40: Adhesive tape attachment unit 41: Adhesive tape 50: Double-sided tape attachment unit 51: Double-sided tape 51a: Release paper 60: Frame body 70: Release paper peeling unit 71: Gripper 80: Cutting unit 90: Finishing sticker attachment unit 91: Finishing sticker 93: Intake member

Claims

1. a bobbin installation unit on which a bobbin is installed; a film supplying unit for supplying an electrode connecting film to the bobbin; a transfer unit for transferring the electrode connecting film installed in the film supply unit to the bobbin installation unit; an adhesive tape attachment unit, which is installed on the bobbin installation unit and attaches the end of the electrode connecting film drawn out by the transfer unit to the bobbin; a double-sided tape attachment unit that attaches a double-sided tape to the electrode connecting film wound around the bobbin; a frame body on which the adhesive tape attachment unit and the double-sided tape attachment unit are movably mounted,

2. The bobbin installation unit includes: a winding machine that rotates the bobbin to wind up the electrode connecting film; The electrode connecting film winding device according to claim 1 , further comprising: a chucking member that fixes the bobbin installed on the winding machine.

3. The adhesive tape attachment unit is installed so as to be horizontally movable in a width direction of the bobbin, 2. The electrode connecting film winding device according to claim 1, wherein the adhesive tape attachment unit attaches adhesive tape to an end of the electrode connecting film while moving in a width direction of the bobbin, thereby fixing the electrode connecting film on the bobbin.

4. 4. The electrode connecting film winding device according to claim 3, further comprising a cutting unit connected to the adhesive tape attaching unit and configured to cut the electrode connecting film to which the double-sided tape is attached by the double-sided tape attaching unit.

5. 5. The electrode connecting film winding device according to claim 4, further comprising a finishing sticker attaching unit disposed under the cutting unit and attaching a finishing sticker to the cut end of the electrode connecting film to fix the electrode connecting film.

6. The winding device for an electrode connecting film according to claim 1 , wherein the double-sided tape attachment unit is installed on the upper part of the transport unit so as to be movable up and down.

7. 7. The electrode connecting film winding device according to claim 1, further comprising a release paper peeling unit that peels off a release paper from the double-sided tape attached to the electrode connecting film.

8. The transfer unit includes: At least one base plate supporting the electrode connecting film to be transferred; At least one driving roller for transporting the electrode connecting film; The electrode connecting film winding device according to claim 1 , further comprising: a moving roller movably installed to maintain tension on the electrode connecting film being transported.

9. A method for winding up an electrode connecting film by a winding device for the electrode connecting film, comprising: The winding device, a bobbin installation unit on which a bobbin is installed; a film supplying unit for supplying an electrode connecting film to the bobbin; a transfer unit for transferring the electrode connecting film installed in the film supply unit to the bobbin installation unit; an adhesive tape attachment unit, which is installed on the bobbin installation unit and attaches the end of the electrode connecting film drawn out by the transfer unit to the bobbin; a double-sided tape attachment unit that attaches a double-sided tape to the electrode connecting film wound around the bobbin; a cutting unit connected to the adhesive tape attaching unit and configured to cut the electrode connecting film to which the double-sided tape is attached by the double-sided tape attaching unit, A step of inserting and setting the bobbin; positioning an end of an electrode connecting film on the bobbin; attaching an adhesive tape to an end of the electrode connecting film to fix the electrode connecting film to the bobbin; rotating the bobbin and winding the electrode connecting film onto the bobbin; attaching a double-sided tape to the electrode connecting film wound on the bobbin; cutting the electrode connecting film to which the double-sided tape is attached.

10. The winding device further includes a release paper peeling unit that peels off a release paper from the double-sided tape attached to the electrode connecting film, The method of claim 9, further comprising the step of peeling off a release liner from the double-sided tape after the step of attaching the double-sided tape to the electrode connecting film.

11. The winding device includes a finishing sticker attachment unit that attaches a finishing sticker to the cut end of the electrode connection film to fix the electrode connection film, 11. The method of claim 9 or 10, further comprising, after the step of cutting the electrode connecting film to which the double-sided tape is attached, attaching a finishing sticker to an end of the electrode connecting film adjacent to the portion to which the double-sided tape is attached, to fix the end of the electrode connecting film.

12. Bobbin and an electrode connecting film wound around the bobbin; a double-sided tape attached to the outermost end of the wound electrode connecting film; an electrode connected to the double-sided tape and wound around the bobbin outside the electrode connecting film.

13. The electrode roll according to claim 12 , further comprising an adhesive tape that bonds a winding start end of the electrode connecting film to the bobbin.

14. 14. The electrode roll according to claim 12 or 13, wherein the electrode connecting film is one selected from the group consisting of polyethylene terephthalate (PET), polyethylene naphthalate (PEN), oriented polypropylene (OPP), polyimide (PI), polybutylene terephthalate (PBT), polyester, polyacetal, polyamide, polyethersulfone, polyphenylene oxide, polyphenylene sulfide, polyethylene naphthalene, and flexible silicone.

15. The electrode roll of claim 13 , wherein the adhesive tape is an OPP tape.

Images