Sealing tape attachment device capable of adjusting dispensed length of sealing tape

Abstract

The present invention relates to a sealing tape attachment device comprising: a first supply unit for supplying a jelly roll-type assembly; a second supply unit for supplying a sealing tape to be attached to a wound end of the jelly roll-type assembly; a cutting unit for cutting the sealing tape; a suction unit for suctioning the sealing tape supplied by the second supply unit; and a pressing unit for attaching the sealing tape to the electrode assembly, wherein the second supply unit dispenses the sealing tape in a length corresponding to the diameter of the jelly roll-type assembly.

Description

Sealing tape attachment device capable of adjusting the extraction length of the sealing tape

[0001] This application claims the benefit of priority based on Korean Patent Application No. 2024-0148649 filed on October 28, 2024, and all contents disclosed in the document of said Korean patent application are incorporated herein as part of this specification.

[0002] The present invention relates to a sealing tape attachment device capable of adjusting the sealing tape ejection length. Specifically, the invention relates to a sealing tape attachment device capable of adjusting the sealing tape ejection length so that a sealing tape of an appropriate length can be attached according to the diameter of the jelly-roll type assembly supplied to the supply position of the jelly-roll type assembly.

[0003]

[0004] Due to the need for eco-friendly alternative energy driven by rapidly worsening climate change and carbon emission regulations, research and development on lithium-ion batteries with high energy density and high power output characteristics is actively underway.

[0005] Lithium secondary batteries can be classified into cylindrical, prismatic, and pouch-type cells depending on their shape, and the cylindrical cell is widely used due to its structural safety and standardized size.

[0006] Generally, a cylindrical battery cell is manufactured by applying an electrode active material to an electrode current collector, drying it, and then roll-pressing and cutting it to produce a positive electrode sheet and a negative electrode sheet, inserting a separator sheet between the positive electrode sheet and the negative electrode sheet and winding it to produce a jelly-roll type electrode assembly, inserting the jelly-roll type electrode assembly into a cylindrical battery can, injecting an electrolyte, and then sealing it.

[0007] Defects may occur during the manufacturing process of the above anode sheet, cathode sheet, and separator sheet, but it is difficult to immediately remove the defective parts in the process where the defects occur. Therefore, the defective anode sheet, defective cathode sheet, and defective separator sheet are wound into a jelly-roll form, sealed with a sealing tape to prevent unraveling, and then separated and disposed of.

[0008] A sealing tape is attached to the end of the winding of a jelly-roll type assembly wound in a jelly-roll shape, and if the sealing tape is not properly attached, the winding state of the jelly-roll type assembly may unravel.

[0009] Meanwhile, as the diameter of the jelly-roll type assembly decreases, the appropriate ejection length of the sealing tape increases, and conversely, as the diameter of the jelly-roll type assembly increases, the appropriate ejection length of the sealing tape decreases.

[0010] For example, if a defective electrode sheet occurs, a single-winding assembly is formed in which only the anode sheet or cathode sheet with the defective part is wound, and if a defective separator sheet occurs, a single-winding separator assembly is formed in which only the separator sheet is wound, and a normal anode sheet, a normal cathode sheet, and a normal separator sheet can be wound to form a composite assembly, wherein the diameters of the single-winding assembly, the single-winding separator assembly, and the composite assembly may be different.

[0011] However, in conventional sealing tape attachment devices, when the extraction length of the sealing tape to be attached to the winding end of a jelly-roll type assembly was set to a specific length, only that set length was extracted. Therefore, if the extraction length of the sealing tape was set to fit a composite assembly with a relatively large diameter, the sealing tape had to be attached to a single-wind type assembly with a relatively small diameter as well; in this case, because the length of the sealing tape was short, the tape would fold or wrinkle, potentially causing adhesion defects on the outer surface of the jelly-roll type assembly.

[0012] In this regard, Patent Document 1 relates to a method for attaching a seal tape, and discloses a method and apparatus in which the seal tape is attached to a jelly-roll type electrode assembly with appropriate adhesive force without being damaged or overlapping.

[0013] However, Patent Document 1 does not provide a technology that can adjust the length of the seal tape in response to changes in the diameter of the jelly-roll type electrode assembly.

[0014] Therefore, there is a need for a technology that can prevent sealing tape adhesion failure by supplying a sealing tape of an appropriate length according to the change in diameter of the jelly-roll type assembly supplied to the sealing tape attachment device.

[0015] (Prior Art Literature)

[0016] (Patent Document 1) Korean Published Patent Application No. 2017-0035216 (March 30, 2017)

[0017]

[0018] The present invention aims to solve the above-mentioned problem by providing a sealing tape attachment device capable of ensuring the adhesion of a sealing tape by supplying a sealing tape of an appropriate length according to the diameter of a supplied jelly-roll type assembly.

[0019]

[0020] A sealing tape attachment device according to the present invention for achieving such an objective comprises a first supply unit for supplying a jelly-roll type assembly, a second supply unit for supplying a sealing tape to be attached to the winding end of the jelly-roll type assembly, a cutting unit for cutting the sealing tape, an adsorption unit for adsorbing the sealing tape supplied by the second supply unit, and a pressurizing unit for attaching the sealing tape to the electrode assembly, wherein the length of the sealing tape supplied by the second supply unit may be set differently depending on the diameter of the jelly-roll type assembly.

[0021] In the sealing tape attachment device according to the present invention, the jelly-roll type assembly may be any one selected from the group comprising a separator single-winding assembly in which only a separator is wound, a single-winding assembly in which either an anode or a cathode is wound, and a combined-winding assembly in which both an anode and a cathode are wound.

[0022] In a sealing tape attachment device according to the present invention, the first supply unit comprises a winding unit for winding the single winding assembly, the combined winding assembly, or the separator single winding assembly, an attachment unit for attaching a sealing tape to a jelly-roll type assembly assembled in the winding unit, and a discharge unit for discharging the jelly-roll type assembly with the sealing tape attached. The winding unit, the attachment unit, and the discharge unit may form a rotating body sharing a single rotation axis and may be configured to attach a sealing tape to a jelly-roll type assembly and discharge the jelly-roll type assembly while rotating about the rotation axis.

[0023] In a sealing tape attachment device according to the present invention, the second supply unit comprises an extraction chuck for transporting the sealing tape, a gripper for fixing the sealing tape to the extraction chuck, and an extraction chuck mounting unit on which the extraction chuck is mounted, and the extraction chuck can move in a forward direction and a backward direction while mounted on the extraction chuck mounting unit.

[0024] A sealing tape attachment device according to the present invention further includes a control unit that collects information on the type of jelly-roll type assembly supplied by the first supply unit and sets and stores the forward direction movement distance of the extraction chuck according to the type of jelly-roll type assembly, and the extraction chuck can move by the movement distance set in the control unit.

[0025] In the sealing tape attachment device according to the present invention, as the diameter of the jelly-roll type assembly decreases, the travel distance of the extraction chuck increases, and the length of the supplied sealing tape can be increased.

[0026] In the sealing tape attachment device according to the present invention, the movement of the extraction chuck can be performed by a servo motor.

[0027] In a sealing tape attachment device according to the present invention, the cutting unit includes a cutter that cuts the sealing tape and a cutter conveying unit that conveys the cutter toward the sealing tape, and the cutter conveying unit can convey the cutter in a direction orthogonal to the sealing tape.

[0028] In the sealing tape attachment device according to the present invention, the adsorption unit may include an adsorption pad that adsorbs the sealing tape, and an adsorption pad transfer unit that transfers the adsorption pad so that the sealing tape is attached to the jelly-roll type assembly.

[0029] In the sealing tape attachment device according to the present invention, the cutting part can cut the sealing tape while the sealing tape is adsorbed to the adsorption pad.

[0030] In the sealing tape attachment device according to the present invention, the pressurizing unit may include a nip roll for attaching the sealing tape to the surface of the jelly-roll type assembly, and a nip roll conveying unit for conveying the nip roll.

[0031] In the sealing tape attachment device according to the present invention, when the jelly-roll type assembly in the attachment part of the first supply part rotates, the nip roll presses the jelly-roll type assembly and rotates, and the sealing tape can be attached to the surface of the rotating jelly-roll type assembly.

[0032] The present invention provides a method for attaching a sealing tape using the sealing tape attachment device described above. Specifically, the method may include: a first step of manufacturing a jelly-roll type assembly by winding it in a winding section of a first supply unit and then placing the jelly-roll type assembly in an attachment section; a second step of extracting a sealing tape from a second supply unit; a third step of moving an adsorption unit toward the sealing tape and adsorbing and fixing the sealing tape to an adsorption pad; a fourth step of moving a cutting unit toward the sealing tape and cutting the sealing tape; and a fifth step of moving a pressure unit toward the sealing tape so that a nip roll pushes the sealing tape and attaches it to the winding end of the jelly-roll type assembly.

[0033] In the method for attaching a sealing tape according to the present invention, the movement length of the extraction chuck is pre-set according to the diameter of the jelly-roll type assembly, and the length at which the sealing tape is extracted in the second step can be determined as the length at which the sealing tape is discharged while the extraction chuck moves by the pre-set length.

[0034]

[0035] The present invention can also be provided in a form that combines various means for solving the above problem.

[0036]

[0037] As described above, the sealing tape attachment device according to the present invention can improve the adhesion of the sealing tape by setting it so that a sealing tape of an appropriate length is ejected according to the diameter of the jelly-roll type assembly.

[0038] Therefore, loosening of the jelly-roll type assembly due to poor sealing tape attachment can be prevented.

[0039]

[0040] FIG. 1 is a perspective view of a sealing tape attachment device according to the present invention.

[0041] Figure 2 is a front view briefly illustrating a part of the structure of Figure 1.

[0042] FIG. 3 is a perspective view of the second supply section and cutting section of FIG. 1.

[0043] Figure 4 is a perspective view of the adsorption part and the pressurizing part of Figure 1.

[0044] Figure 5 is a schematic diagram showing the process of attaching a sealing tape using a sealing tape attachment device.

[0045]

[0046] Embodiments that enable a person skilled in the art to easily practice the present invention are described in detail below with reference to the attached drawings. In describing the operating principles of the embodiments of the present invention in detail, specific descriptions of related known functions or configurations are omitted if it is determined that such detailed descriptions may unnecessarily obscure the essence of the present invention.

[0047] The same reference numerals are used for parts having similar functions and operations throughout the drawings. Throughout the specification, when a part is described as being connected to another part, this includes not only cases where they are directly connected but also cases where they are indirectly connected with other elements in between. Furthermore, the inclusion of a certain component means that, unless specifically stated otherwise, it does not exclude other components but rather implies that additional components may be included.

[0048] Descriptions that specify components by limiting or adding them may be applied to all inventions unless specifically limited, and are not limited to descriptions of specific inventions.

[0049] Throughout the description of the invention and claims of this application, anything indicated in the singular includes cases where it is plural unless otherwise noted.

[0050] Throughout the description of the invention and the claims of the present invention, "or" includes "and" unless otherwise noted. Therefore, "comprising A or B" means all three of the above cases: including A, including B, or including both A and B.

[0051] The present invention is described in detail with reference to the drawings and embodiments.

[0052] FIG. 1 is a perspective view of a sealing tape attachment device according to the present invention, FIG. 2 is a front view showing a simplified part of the structure of FIG. 1, and FIG. 3 is a perspective view of the second supply part and the cutting part of FIG. 1.

[0053] Referring to FIGS. 1 to 3, the sealing tape attachment device according to the present invention comprises a first supply unit (100) for supplying a jelly-roll type assembly (10), a second supply unit (200) for supplying a sealing tape (20) to be attached to the winding end of the jelly-roll type assembly (10), a cutting unit (300) for cutting the sealing tape (20), an adsorption unit (400) for adsorbing the sealing tape (20) supplied from the second supply unit (200), and a pressurizing unit (500) for attaching the sealing tape (20) to the electrode assembly (10).

[0054] The jelly-roll type assembly (10) is any one selected from the group comprising a single-winding assembly (10B) in which either an anode or a cathode is wound, a combined-winding assembly (10C) in which both an anode and a cathode are wound, and a separator single-winding assembly (10A) in which only a separator is wound.

[0055] Generally, the diameter of the jelly-roll type assembly (10) can increase in the order of the separator single-wind assembly (10A), single-wind assembly (10B), and combined-wind assembly (10C), and the second supply unit (200) can be set so that the length of the sealing tape (20) supplied varies according to the diameter of the jelly-roll type assembly (10).

[0056] The first supply unit (100) includes a winding unit (110) for winding a separator single-winding assembly (10A), a single-winding assembly (10B), or a combined-winding assembly (10C), an attachment unit (120) for attaching a sealing tape (20) to a jelly-roll type assembly (10) assembled in the winding unit (110), and a discharge unit (130) for discharging the jelly-roll type assembly (10) with the sealing tape (20) attached, and the winding unit (110), the attachment unit (120), and the discharge unit (130) form a rotating body that shares a single rotation axis (140). The first supply unit (100) is configured to rotate around a rotation axis (140) to send a jelly-roll type assembly (10) assembled in a winding unit (110) to an attachment unit (120), and after attaching a sealing tape (20) to the jelly-roll type assembly (10) in the attachment unit (120), discharge the jelly-roll type assembly (10) through a discharge unit (130).

[0057] The second supply unit (200) includes an extraction chuck (210) for transporting the sealing tape, a gripper (220) for fixing the sealing tape (20) to the extraction chuck (210), and an extraction chuck mounting unit (230) on which the extraction chuck (210) is mounted, and the extraction chuck (210) moves in a forward direction and a backward direction while mounted on the extraction chuck mounting unit (230). The forward direction is the direction in which the extraction chuck (210) moves toward the jelly-roll type assembly (10) while mounted on the extraction chuck mounting unit (230), and the backward direction is the opposite direction to the forward direction.

[0058] The sealing tape attachment device according to the present invention further includes a control unit (not shown) that collects information regarding the type of jelly-roll type assembly (10) located at the attachment unit (120) of the first supply unit (100), and sets and stores the forward direction movement distance of the extraction chuck (210) according to the type of jelly-roll type assembly (10). The extraction chuck (210) can move by the movement distance set in the control unit.

[0059] At this time, the movement of the extraction chuck (210) can be performed by a servo motor.

[0060] Referring to FIG. 2, A, B, and C represent the ends of a sealing tape (20) that are extracted to an appropriate length according to the type of jelly-roll type assembly with different diameters. Specifically, A represents the end of a sealing tape (20) extracted to be attached to a separator single-wind type assembly (10A), B represents the end of a sealing tape (20) extracted to be attached to a single-wind type assembly (10B), and C represents the end of a sealing tape extracted to be attached to a composite type assembly (10C). The length of the sealing tape (20) extracted from the second supply unit (200) is longest for the sealing tape (20) with end A and shortest for the sealing tape (20) with end C.

[0061] That is, as the diameter of the jelly-roll type assembly (10) decreases, the travel distance of the extraction chuck (210) increases, and the length of the supplied sealing tape (20) can be increased. Conversely, as the diameter of the jelly-roll type assembly (10) increases, the travel distance of the extraction chuck (210) decreases, and the length of the supplied sealing tape (20) can be shortened. This is because as the diameter of the jelly-roll type assembly (10) decreases, the distance the pressure member (500) travels to attach the sealing tape (20) attached to the suction pad (410) to the outer surface of the jelly-roll type assembly increases, and thus a relatively long sealing tape is required.

[0062] The cutting unit (300) includes a cutter (310) for cutting the sealing tape (10) and a cutter transport unit (320) for transporting the cutter (310) toward the sealing tape (20). The cutter transport unit (320) can transport the cutter (310) in a direction orthogonal to the sealing tape (20). Alternatively, the cutter (310) itself may be formed in a form that increases or decreases in length.

[0063] A type of cylinder can be used as the cutter transfer unit (320).

[0064] Figure 4 is a perspective view of the adsorption part and the pressurizing part of Figure 1.

[0065] Referring to FIG. 4 together with FIG. 3, the adsorption unit (400) includes an adsorption pad (410) that adsorbs the sealing tape (20), and an adsorption pad transfer unit (420) that transfers the adsorption pad (410) so that the sealing tape (20) is attached to the jelly-roll type assembly (10). When the extraction chuck (210) of the second supply unit (200) extracts the sealing tape (20), the adsorption pad transfer unit (420) may be extended so that the adsorption pad (410) is positioned on the lower surface of the extracted sealing tape (20). The sealing tape (20) may be fixed to the upper surface of the adsorption pad (410). In this way, the cutting unit (300) can cut the sealing tape (20) while the sealing tape (20) extracted from the end of the sealing tape winding roll is adsorbed to the adsorption pad (410). When the cutter (310) of the cutting section (300) cuts the sealing tape (20), the sealing tape (20) is separated from the sealing tape winding roll and becomes fixed by being adsorbed to the suction pad (410).

[0066] A type of cylinder can be used as the adsorption pad transfer unit (420).

[0067] The pressurizing unit (500) includes a nip roll (510) for attaching the sealing tape (20) to the surface of the jelly-roll assembly (10), and a nip roll conveying unit (520) for conveying the nip roll (510).

[0068] With the sealing tape (20) attached to the suction pad (410), the nip roll transfer unit (520) moves upward so that the nip roll (510) comes close to the sealing tape (20), and pushes the sealing tape (20) so that it is attached to the winding end of the jelly-roll type assembly (10).

[0069] When the sealing tape (20) is attached to the jelly-roll assembly (10), the nip roll (510) can rotate while pressing the sealing tape (20) as the jelly-roll assembly (10) rotates, and such rotation of the nip roll (510) enables the sealing tape (20) to be rubbed so that it adheres well to the jelly-roll assembly (10).

[0070] In this way, when the jelly-roll type assembly (10) in the attachment part (120) of the first supply part (100) rotates, the nip roll (510) rotates together, so that the sealing tape (20) can be attached to the surface of the rotating jelly-roll type assembly (10) to form a wider adhesive surface.

[0071] Figure 5 is a schematic diagram showing the process of attaching a sealing tape using a sealing tape attachment device.

[0072] Referring to FIG. 5 together with FIG. 2, the process of attaching a sealing tape using a sealing tape attachment device according to the present invention comprises: a first step of manufacturing a jelly-roll type assembly (10) by winding it from the winding section (110) of the first supply section (100) and then placing the jelly-roll type assembly (10) to the attachment section (120); a second step of extracting a sealing tape (20) from the second supply section (200); a third step in which an adsorption section (400) moves toward the sealing tape (20) and adsorbs and fixes the sealing tape (10) to the adsorption pad (410); a fourth step in which a cutting section (300) moves toward the sealing tape and cuts the sealing tape (20); and a pressurizing section (500) moves toward the sealing tape (10) so that the nip roll (510) pushes the sealing tape (20) to form a jelly-roll type It includes a fifth step of attaching to the wound end of the assembly (10).

[0073] In the above fourth step, the cutter can cut the sealing tape by the extension of the cutter feed unit, or the length of the cutter itself can be extended to the sealing tape to cut the sealing tape.

[0074] In the present invention, the movement length of the extraction chuck (210) is pre-set according to the diameter of the jelly-roll type assembly (10), and the length for which the sealing tape (20) is extracted in the second step is determined as the length for which the sealing tape (20) is discharged while the extraction chuck (210) moves by the pre-set length.

[0075] The diameter may vary depending on the type of jelly-roll type assembly (10). In the present invention, the movement distance of the extraction chuck that determines the extraction length of the sealing tape according to the type of jelly-roll type assembly (10) is pre-set. When the type of jelly-roll type assembly (10) is transmitted to the control unit, the control unit can control the extraction chuck to move according to the pre-set type of jelly-roll type assembly, so that a sealing tape of a length matching the diameter of the jelly-roll type assembly (10) can be extracted.

[0076] Therefore, a sealing tape of appropriate length can be cut and attached to a jelly-roll assembly by a nip roll, thereby minimizing adhesion defects that may occur during the sealing tape attachment process.

[0077]

[0078] A person skilled in the art to which the present invention pertains would be able to perform various applications and modifications within the scope of the present invention based on the above content.

[0079] (Explanation of symbols)

[0080] 10: Jelly-roll type assembly

[0081] 10A: Separator single-winding assembly

[0082] 10B: Single-winding assembly

[0083] 10C: Synthesized assembly

[0084] 20: Sealing tape

[0085] 100: First supply unit

[0086] 110: Winding unit

[0087] 120: Attachment

[0088] 130: Discharge part

[0089] 140: Rotation axis

[0090] 200: Second supply unit

[0091] 210: Extraction Chuck

[0092] 220: Gripper

[0093] 230: Ejection chuck mounting part

[0094] 300: Cutting section

[0095] 310: Cutter

[0096] 320: Cutter feed section

[0097] 400: Adsorption part

[0098] 410: Suction pad

[0099] 420: Suction pad transfer unit

[0100] 500: Pressurizing part

[0101] 510: Niproll

[0102] 520: Nip-roll transfer unit

Claims

1. A first supply unit that supplies a jelly-roll type assembly; A second supply unit for supplying a sealing tape to be attached to the wound end of the above jelly-roll type assembly; A cutting part for cutting the above sealing tape; An adsorption unit for adsorbing the sealing tape supplied from the second supply unit; and A pressure member for attaching the sealing tape to the electrode assembly; Includes, The above second supply unit is a sealing tape attachment device in which the length of the sealing tape supplied is set differently depending on the diameter of the jelly-roll type assembly.

2. In Paragraph 1, The above jelly-roll type assembly is a sealing tape attachment device selected from the group comprising a separator single-winding assembly in which only the separator is wound, a single-winding assembly in which either the positive or negative electrode is wound, and a combined-winding assembly in which both the positive and negative electrodes are wound.

3. In Paragraph 2, The above first supply unit is, A winding unit for winding the above single-winding assembly, the above combined-winding assembly, or the above separator single-winding assembly; An attachment part for attaching a sealing tape to a jelly-roll type assembly assembled in the above-mentioned winding part; and A discharge unit for discharging a jelly-roll type assembly with the above-mentioned sealing tape attached; Includes, The above winding part, the above attachment part and the above discharge part constitute a rotating body that shares a single rotation axis, and A sealing tape attachment device configured to attach a sealing tape to a jelly-roll type assembly while rotating around the above-mentioned rotation axis and to discharge the jelly-roll type assembly.

4. In Paragraph 1, The above second supply unit is, An extraction chuck for transporting the sealing tape above; A gripper for fixing the sealing tape to the extraction chuck; and It includes an extraction chuck mounting portion on which the above extraction chuck is mounted, and The above-mentioned extraction chuck is a sealing tape attachment device that moves in the forward and backward directions while mounted on the extraction chuck mounting part.

5. In Paragraph 4, It further includes a control unit that collects information on the type of jelly-roll type assembly supplied by the first supply unit and sets and stores the forward movement distance of the extraction chuck according to the type of jelly-roll type assembly. The above extraction chuck is a sealing tape attachment device that moves by a travel distance set in the control unit.

6. In Paragraph 5, A sealing tape attachment device in which the travel distance of the extraction chuck increases and the length of the supplied sealing tape increases as the diameter of the jelly-roll type assembly decreases.

7. In Paragraph 5, A sealing tape attachment device in which the movement of the above-mentioned extraction chuck is performed by a servo motor.

8. In Paragraph 1, The above cutting part is, A cutter for cutting the sealing tape; and A cutter transfer unit that transfers the cutter toward the sealing tape; Includes, The cutter conveying unit is a sealing tape attachment device that conveys the cutter in a direction orthogonal to the sealing tape.

9. In Paragraph 1, The above adsorption part is, A sealing tape attachment device comprising an adsorption pad for adsorbing the sealing tape, and an adsorption pad transfer unit for transferring the adsorption pad so that the sealing tape is attached to the jelly-roll type assembly.

10. In Paragraph 9, A tape attachment device in which the cutting part cuts the sealing tape while the sealing tape is adsorbed to the suction pad.

11. In Paragraph 1, The above-mentioned pressurizing unit is, A nip roll for attaching the sealing tape to the surface of the jelly-roll type assembly; and A sealing tape attachment device comprising a nip roll transfer unit for transferring the nip roll.

12. In Paragraph 11, A sealing tape attachment device in which, when the jelly-roll type assembly in the attachment part of the first supply unit rotates, the nip roll presses the jelly-roll type assembly and rotates, and the sealing tape is attached to the surface of the rotating jelly-roll type assembly.

13. A method for attaching a sealing tape using a sealing tape attachment device according to any one of claims 1 to 12, A first step of manufacturing a jelly-roll type assembly by winding it in the winding section of the first supply section and then placing the jelly-roll type assembly in the attachment section; A second step of extracting the sealing tape from the second supply unit; A third step in which the adsorption part moves toward the sealing tape and adsorbs and fixes the sealing tape to the adsorption pad; A fourth step in which a cutting part moves toward the sealing tape to cut the sealing tape; and A fifth step in which a pressurizing part moves toward the sealing tape and the nip roll pushes the sealing tape to attach it to the wound end of the jelly-roll type assembly; A method for attaching sealing tape including 14. In Paragraph 13, The travel length of the extraction chuck is pre-set according to the diameter of the above jelly-roll type assembly, and A method for attaching a sealing tape in which the length of the sealing tape ejected in the second step is determined as the length of the sealing tape ejected while the ejection chuck moves by the preset length.

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