KR102226492B1 - Tape attaching apparatus for jelly roll of secondary battery and tape attaching method using same - Google Patents

Abstract

The present invention comprises a first base, a plurality of taping units configured to reciprocate toward a jelly roll on the first base, and a control unit configured to control the operation of the plurality of taping units, each taping unit is a tape A tape reel mounting portion configured to attach and detach a tape roll wound in a roll form, a head portion configured to temporarily fix the distal end side of the tape unwound from the tape reel, and attach the tape to the jelly roll by compressing it, It includes an elevating unit configured to elevate the head portion, a cutting portion configured to cut the tape from one side of the head portion when the tape is attached to the jelly roll, and controls the operation of a plurality of taping units, and each taping It relates to a tape attaching apparatus and a tape attaching method for a secondary battery jelly roll including a control unit for controlling the operation of a plurality of taping units so that the lifting height and the interval of the unit can be independently adjusted.
In the tape attaching device and the tape attaching method according to the present invention, since the tape attaching device and the tape attaching method for a secondary battery jelly roll performs taping while providing tension, the tape can be firmly attached while pressing the jelly roll.
In addition, since taping is performed in consideration of the difference in partial thickness of the jelly roll, it is possible to firmly attach the tape while preventing damage to the jelly roll.

Description

Tape attaching device for secondary battery jelly roll and tape attaching method using it {TAPE ATTACHING APPARATUS FOR JELLY ROLL OF SECONDARY BATTERY AND TAPE ATTACHING METHOD USING SAME}

The present invention relates to a tape attaching device for a secondary battery jelly roll and a tape attaching method using the same, and more particularly, to a tape attaching device for performing taping in a compressed state of a secondary battery jelly roll, and a tape attaching method using the same. About.

The manufacturing process of the secondary battery may include forming a jelly roll composed of a negative electrode plate, a positive electrode plate, and a separator, and inserting and sealing the jelly roll into a case such as a rectangular pouch or can.

At this time, before smoothly inserting the jelly roll into the rectangular case, the process of compressing the jelly roll into a rectangular shape and attaching a number of tapes to the edge of the jelly roll to keep the jelly roll compressed Should be included.

The tape bonding device for a secondary battery has been disclosed by “Korea Patent No. 1820442: a taping device for an electrode assembly of a battery cell and a battery cell manufactured using the taping device”.

The registered patent is attached after cutting the tape first. However, in the case of the jelly roll, when compression is performed for the casing, there may be a problem in that a partial damage or partial fixation force of the jelly roll is changed if the difference in thickness of the laminated portion structurally parallel to the curved portion is not considered.

Korean Patent Registration No. 1820442 (announced on January 19, 2018)

The present invention provides a secondary battery jelly roll tape attaching device and a tape attaching method using the same to solve the problem of partial damage and partial fixation of the jelly roll caused when the tape is attached to a conventional compressed jelly roll. Has its purpose.

As a means of solving the above problems, a first base, a plurality of taping units configured to reciprocate toward the jelly roll on the first base, and a control unit configured to control the operation of the plurality of taping units, each taping unit A tape reel mounting portion configured to attach and detach a tape roll wound with silver tape in a roll form, a head configured to temporarily fix the distal end of the tape unwound from the tape reel, and attach the tape to the jelly roll by pressing it It includes an elevating unit configured to elevate the unit, the head unit, and a cutting unit configured to cut the tape at one side of the head unit when the tape is attached to the jelly roll, and controls the operation of a plurality of taping units, respectively. There may be provided a tape attaching device for a secondary battery jelly roll including a control unit for controlling the operation of a plurality of taping units so that the lifting height of the taping unit can be independently adjusted.

Here, the control unit may control the plurality of lifting units so that the lifting distance of at least one of the plurality of head parts may be different.

In addition, the controller may independently control the plurality of lifting units so that the lifting distance of the head part that attaches the tape to the taping point closest to the curved part of the compressed secondary battery jelly roll among the plurality of head parts may be longer.

In addition, the controller may independently control the plurality of taping units so that the taping area attached to the side of the jelly roll may be changed.

Furthermore, the control unit may be configured such that a tape attachment area at a middle portion of one side of the jelly roll has a height smaller than that of other tape attachment areas.

In addition, the control unit controls the elevating unit so that the height at the start of attaching the tape to the jelly roll at a plurality of taping positions is the same, and the height at the end of attaching the tape to the jelly roll at a plurality of taping positions is at least one different. You can control the unit.

On the other hand, the control unit controls the elevating unit so that at least one of the heights at which the tape is started to be attached can be different at a plurality of taping positions, and the elevating unit is controlled to have the same height at the end of the tape attachment at the plurality of taping positions. I can.

Meanwhile, a transfer unit configured to support a plurality of taping units and configured to reciprocate a second base and a second base provided to be reciprocated toward the jelly roll on the first base and the first base may be further included. I can.

Meanwhile, each taping unit further includes a transfer block supported by the second base, a frame configured to be lifted from the transfer block, and the elevating unit is configured to lift the frame, a head portion, a cutting portion, and The tape reel mounting portion may be provided on the frame.

On the other hand, the plurality of taping units are configured to be spaced apart from each other on the second base, and may further include a space adjusting unit configured to adjust the space between the plurality of taping units.

Further, a horizontal position fixing clamp provided in the taping unit and configured to selectively fix the position of the taping unit may be further included.

In addition, the taping unit may further include a sensor unit configured to check the presence or absence of the tape on the path of the tape unwound from the tape reel to the head unit.

In addition, in the method of attaching a tape to a jelly roll for a secondary battery that has been wound and compressed, in which one end of each tape unwound from a plurality of tape reels is simultaneously attached to a plurality of points on the first side of the jelly roll. 1 The tape attaching step, as the tape attaching area is expanded to the second side, which is the side of the jelly roll, the tape is unwound from the plurality of tape reels, and at least one of the plurality of tape attaching areas on the second side has a different tape attaching length. A method of attaching a tape for a jelly roll for a secondary battery comprising a second tape attaching step, a third tape attaching step of extending the tape attaching area to a second side opposite to the first side, and a tape cutting step of cutting a plurality of tapes, respectively. Can be provided.

On the other hand, the tape attaching device is performed by a tape attaching device including a plurality of taping units, and the first tape attaching step is a forward moving step of entering the head of the tape attaching device into the vertical lower area of the jelly roll, and the head The step of raising the head part so that one end of the tape mounted on the part can be attached to the first surface in the upward direction, and a rearward moving step of moving the head part rearward so that the end of the head part escapes the vertical lower area of the jelly roll. Can include.

Meanwhile, in the second tape attaching step, the tape may be attached to a region including the curved portion among the plurality of tape attachment points with a longer length.

In addition, the second tape attaching step may be performed by raising the taping head in a state in which tension in a predetermined range is generated when the tape is unwound from the tape reel.

Secondary battery jelly roll tape attaching device and tape attaching method using the same according to the present invention can quickly attach the tape with a strong fixing force to the jelly roll, and it is possible to prevent damage to the jelly roll when attaching the tape, thereby improving productivity. There is an effect that can be.

1 is a perspective view showing a tape attaching device for a secondary battery jelly roll according to an embodiment of the present invention.
2 is a side view showing a unit tape attachment path in a tape attachment apparatus for a jelly roll for a secondary battery according to an embodiment of the present invention.
3 is a perspective view showing a driving unit of a tape attaching device for a secondary battery according to an embodiment of the present invention.
4 is a conceptual diagram showing the concept of a tape attached to a compressed jelly roll.
5 and 6 are diagrams showing the concept of a process of attaching a tape according to the present invention.
7 is a conceptual diagram showing the difference between the adhesive height and the end height of the tape.
8 is a view showing a concept in which the attachment height and the end height of the tape are set differently.
9 is a sequence of a method for attaching a tape for a jelly roll for a secondary battery according to another embodiment of the present invention.

Hereinafter, an apparatus for attaching a tape for a jelly roll for a secondary battery and a method for attaching a tape using the same according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In addition, in the description of the following embodiments, the names of each component may be referred to as different names in the art. However, if they have functional similarities and identity, even if a modified embodiment is employed, it can be viewed as a uniform configuration. In addition, symbols added to each component are described for convenience of description. However, the content illustrated on the drawings in which these symbols are indicated does not limit each component to the range within the drawings. Likewise, even if an embodiment in which the configuration in the drawings is partially modified is employed, it can be viewed as an equivalent configuration if there is functional similarity and identity. In addition, in view of the level of a general technician in the relevant technical field, if it is recognized as a component that should be included of course, a description thereof will be omitted.

Hereinafter, an apparatus for attaching a tape for a secondary battery according to the present invention will be described with reference to the accompanying drawings.

The tape attaching device for a secondary battery according to an embodiment of the present invention includes a lower portion of the jelly roll 10 in order to maintain the shape of the jelly roll 10 in which the electrode plate and the separator of the secondary battery are wound in a roll shape, is compressed into a rectangular shape. It is used to attach the tape 20 to the side (11), side end (12) and top surface (13). When the jelly roll 10 is compressed, it has a restoring force to return to a cylindrical shape when it is wound, so it needs to be fixed in a compressed state. Here, the upper surface 13 and the lower surface 11 refer to the two surfaces occupying the widest surface in the compressed state of the jelly roll 10 surrounded by the outermost surface of the separator 15, and the side end surface 12 It will be described below on the premise that the silver jelly roll 10 refers to a surface in a direction in which the electrode plate 14 and the separator 15 formed of a plurality of layers are exposed to the side surface of the jelly roll 10.

1 is a perspective view showing an apparatus for attaching a tape for a jelly roll for a secondary battery according to an embodiment of the present invention, and FIG. 2 is a diagram illustrating an attachment path of a unit tape in a tape attachment apparatus for a jelly roll for a secondary battery according to an embodiment of the present invention. It is a side view shown.

1 and 2, the tape attaching apparatus for a secondary battery jelly roll according to the present invention includes a first base 101, a second base 102, a transfer unit 420, a plurality of taping units 200, It may be configured to include an interval adjustment unit 410 and a control unit (not shown).

The first base 101 serves as the overall basis of the tape attachment device, and provides a space that can be combined with an external structure.

The second base 102 is configured to be provided with a plurality of taping units 200 to be described later on the upper side. The second base 102 is connected to the first base 101 downward, and the movement direction may be constrained by the linear guide 421 so that it can be moved in a straight line with the second base 102. In the linear guide 421, the directions of the plurality of linear guides 421 may be determined so that the second base 102 can reciprocate and linearly move toward the jig side where the jelly roll 10 is temporarily fixed.

The transfer unit 420 is provided on one side of the second base 102 to provide a driving force to reciprocate the second base 102 toward the jelly roll 10. The transfer unit 420 may be provided with a servo motor, for example.

The taping unit 200 is configured to be parallel to a plurality of devices so that the tape 20 can be simultaneously attached to a plurality of points of the jelly roll 10 at the same time. Hereinafter, the configuration of each taping unit 200 will be described in detail, and the operation of the taping unit 200 will be described in detail later.

2, each taping unit 200 includes a frame 210, a tape supply unit 220, a head unit 240, a cutting unit 250, a transfer block 260, an elevating unit 270, and a sensor unit ( 280).

The frame 210 is configured in a structure in which a component that performs the functions of unwinding, conveying, temporarily fixing, and cutting the tape 20 may be provided. The frame 210 is formed by extending a central portion along the supply direction of the tape 20. The frame 210 may be provided with a plurality of guide rollers 232 to facilitate the transfer of the tape 20. The frame 210 is configured to be relatively lifted from the transfer block 260 to be described later, and the tape 20 mounted during the lift is configured to be lifted together.

The tape supply unit 220 supplies the tape 20. The tape supply unit 220 may be provided on the rear side (a direction away from the jelly roll 10) of the frame 210. The tape supply unit 220 may include a tape reel 230 supporting the tape 20 in a roll form. A torque limiter 231 may be installed on the rotating shaft of the tape reel 230. The torque limiter 231 performs optimal vector control through constant feedback through torque setting and torque limit according to the supply speed of the tape 20 of the tape reel 230, so that the tape 20 attached to the jelly roll 10 Keep the tension of.

The head portion 240 supports the tip portion of the tape 20. The head part 240 may include a vacuum chuck 241 and a pressing roller 242. The vacuum chuck 241 vacuum-adsorbs the tip of the tape 20. The pressing roller 242 presses the tape 20 toward the jelly roll 10 when the tape 20 is attached to the side end surface 12 and the upper surface 13 of the jelly roll 10.

The cutting part 250 cuts the tape 20 after the tape 20 is attached to the upper surface 13 of the jelly roll 10. The cutting part 250 may include a cutting blade 251, a cutting actuator 252, and a tape clamp 253. The cutting blade 251 may be disposed obliquely between the vacuum chuck 241 and the pressing roller 242. The cutting actuator 252 is supported on the frame 210. The cutting actuator 252 drives the cutting blades 251 and 310 forward and backward toward the tape 20 reciprocally. As the cutting actuator 252, a hydraulic/pneumatic cylinder may be used.

The tape clamp 253 may be disposed behind the cutting blade 251. Before the cutting blade 251 cuts the tape 20, the tape clamp 253 clamps a predetermined portion behind the tape cutting portion 250 so that the tape 20 is cut smoothly. A plurality of guide rollers 232 for guiding the tape 20 to the head unit 240 are disposed between the tape supply unit 220 and the head unit 240. The tape clamp 253 includes a pressure plate 254 disposed to face the guide roller 232 located at the foremost among the plurality of guide rollers 232, and a clamping actuator 255 for reciprocating the pressure plate 254 in the front and rear directions. It may include. As the clamping actuator 255, a hydraulic/pneumatic cylinder may be used. Of course, it is preferable that the surface of the pressure plate 254 and the guide roller 232 located at the foremost be finished with a cushioning material such as a silicone pad to prevent damage to the tape 20.

As described above, the tape 20 supply unit 220, the head unit 240, and the cutting unit 250 are provided on the frame 210 to form a unit tape attachment path.

The transfer block 260 is provided on the upper side of the second base 102 and is configured to support the frame 210 from the lower side of the frame 210. The transfer block 260 may be connected to the upper frame 210 and the linear guide 421 and the above-described lifting unit 270. The transfer block 260 is configured to be moved in a horizontal direction with respect to the second base 102. Therefore, when the distance between the transfer blocks 260 of the plurality of taping units 200 is adjusted, the spacing of the taping regions of the jelly roll 10 can be adjusted.

The lifting unit 270 drives the frame 210 up and down with respect to the transfer block 102 in the up and down directions. The lifting unit 270 may be formed of a combination of a linear guide 421 in the vertical direction, a driving motor and a ball screw, or a combination of a linear guide and a hydraulic/pneumatic cylinder. When the height of the frame 210 is adjusted by driving the lifting unit 270, the height of the head to which the tape 20 is finally attached may be adjusted.

The sensor unit 280 is configured to check the presence or absence of the tape 20 on the conveying path of the unwound tape 20. When the tape 20 does not exist on the transfer path of the tape 20, the sensor unit 280 provides an alarm to the user and provides information so that the used tape reel 230 can be replaced with a new tape reel 230. Can provide. Meanwhile, the sensor unit 280 is provided adjacent to the tape reel 230 so that it is possible to quickly detect a case where the tape 20 is used up.

The above-described taping unit 200 may be configured in a plurality of side by side, and may be configured to simultaneously attach the tape 20 to simultaneously perform taping on a plurality of points on one side of the jelly roll 10.

Meanwhile, although not shown, a control unit (not shown) for controlling the operation of the tape 20 attachment device may be provided. The control unit is configured to control operations related to supply, unwind, cutting, and transfer of the tape 20, and may be configured to control operations related to three-dimensional position adjustment of the head unit 240.

3 is a perspective view showing a driving unit of a tape attaching device for a secondary battery according to an embodiment of the present invention.

Hereinafter, it will be described on the premise that the driving unit is a driving element that causes a change in the three-dimensional position of the head unit 240. The driving unit may be configured to include an elevating unit 270, a transfer unit 420, and an interval adjusting unit 410.

As described above, the lifting unit 270 is provided in each taping unit 200 and is configured to adjust the height of the head part 240.

The transfer unit 420 operates so that the second base 102 can be moved linearly on the first base 101. According to the driving of the transfer unit 420, the plurality of taping units 200 provided on the second base 102 may be moved forward or backward simultaneously based on the direction facing the jelly roll 10. .

The spacing control unit 410 is configured to adjust the spacing between the plurality of taping units 200 on the second base 102. When the size or type of the jelly roll 10 is the same, the interval adjustment unit 410 does not require a separate interval adjustment, so the operating frequency is lowered compared to the above-described lifting unit 270 and transfer unit 420, and once By setting the interval, it is configured so that it can be fixed until reset.

The space adjustment unit 410 may be configured such that the locking mechanism is operated during taping to fix the position, and is unlocked only when the space is adjusted so that the position can be moved.

The distance control unit 410 may include a distance control block 411, a distance control actuator 412, a horizontal position fixing clamp 415, a limiter 416, and a guide rod 417.

The spacing control block 411 is configured to be individually fastened to each taping unit 200 to be temporarily fixed. The spacing control block 411 may include a pin 414 and a pin 414 actuator. The spacing control block 411 is provided on the rear side of the taping unit 200 so that when the pin 414 actuator is driven, the pin 414 protrudes toward the front and has a longer protruding length, and the rear side of the transfer block 260 It is inserted into the pin hole 414a provided in the. Thereafter, when the space control block 411 is horizontally moved, the taping unit 200 connected to the space control block 411 is horizontally moved together.

The distance control actuator 412 is configured to transfer the distance control block 411 in the horizontal direction. The distance control actuator 412 may be configured as an example of a servo motor.

The horizontal position fixing clamp 415 is provided on one side of the transfer block 260 and is configured to selectively fix the guide rod 417 inserted into the inside. The horizontal position fixing clamp 415 is configured so that the position can be fixed by pressing the guide rod 417 by the elasticity of the internal elastic body when a separate hydraulic pressure is not applied. Meanwhile, the hydraulic pressure may be composed of pneumatic pressure as an example.

The limiter 416 may be configured in at least one pair to limit the horizontal distance of the taping unit 200. The limiter 416 may be provided on both sides of the first base 101, and a plurality of taping units 200 may be provided between the pair of limiters 416.

The guide rod 417 may be configured such that both sides can be connected to a pair of limiters 416, respectively. The guide rod 417 is formed and installed extending in a direction in which the interval of the taping unit 200 is adjusted, and is inserted into the horizontal position fixing clamp 415 described above to become a base on which the taping unit 200 can be fixed. .

Hereinafter, the operation of the interval adjustment unit 410 will be described. As an example, a case in which the size of the jelly roll 10 is changed so that the gap between the taping units 200 provided on both outermost sides should be increased will be described.

First, the control unit supplies pneumatic pressure to the horizontal position fixing clamp 415 provided in the taping unit 200 that needs to be spaced, and converts it to an unlocked state. Thereafter, the space control actuator 412 is driven to align the space control block 411 to the rear of the above-described taping unit 200. Thereafter, the pin actuator 413 is driven to insert the pin 414 into the pin hole 414a of the transfer block 260. In this state, the taping unit 200 is moved by horizontally moving the gap adjusting actuator 412 by driving. When the position of the taping unit 200 is aligned, the supply of pneumatic pressure from the horizontal position fixing clamp 415 is cut off, and it is switched back to the locked state. After that, the connection is released by returning the space control block 411 to its original position. By applying such an operation to each taping unit 200, the position is adjusted one by one. When the spacing between the taping units 200 is adjusted, the spacing between the heads 240 is adjusted, and eventually the spacing of the taping regions can be adjusted.

Hereinafter, the operation of the tape attaching device for a secondary battery jelly roll according to the present invention will be described in detail.

4 is a conceptual diagram showing the concept of a tape attached to a compressed jelly roll.

As shown, the tape 20 is attached to a plurality of points in order to keep the jelly roll 10 in a compressed form. On the other hand, looking at the tape attachment area adjacent to the central portion and the curved portions on both sides, the area adjacent to the curved portion is formed somewhat thicker than the central portion by the bent electrode plate 14 and the separator 15. This is caused by structurally increasing the volume per unit length in the horizontal direction with respect to the region including the curved portion. Therefore, if the length of the tape 20 attached in the vertical direction at the center portion and the portion adjacent to the curved portion is uniformly determined, a difference in adhesive force occurs. For example, when the tape 20 is attached shortly based on the thickness of the center portion, a portion of the curved portion may be damaged on the upper surface 13 or the lower surface 11 by the tape attaching device. In addition, in order to prevent damage, if the tape 20 is long attached based on the thickness of the curved portion, it may become loose in the center portion. Therefore, when different thicknesses are partially generated structurally, there is a need to vary the attachment length of the tape 20 according to the thickness.

In this regard, the operation of each taping unit 200 will be described below.

5 and 6 are views showing the concept of a process of attaching the tape 20 according to the present invention.

First, as shown in FIGS. 5(a) and 5(b), the head part 240 of the taping unit 200 moves forward from the lower side of the compressed jelly roll 10. The distance moving forward may be moved by the length of attaching the tape 20 to the lower surface 11. This can be a preset value.

Thereafter, the head part 240 moves upward so that the tape 20 can be attached to the lower surface 11 so that the tape 20 mounted on the head part 240 is transferred to the lower surface 11 of the jelly roll 10. ) Is attached. Thereafter, the head unit 240 is moved to the rear, and when moving to the rear, one side of the attached tape 20 is fixed, and the tape 20 is unwound from the tape reel 230 according to the movement of the head unit 240. The rear moving distance of the head part 240 is set so that the pressing roller 242 provided in the head part 240 can be a position capable of pressing the side surface 12 of the jelly roll 10.

Thereafter, the head portion 240 is raised to perform taping on the side surface 12 of the jelly roll 10 (FIGS. 6 (a) and 6 (b)). When the head part 240 is raised, the tape 20 is pulled out while tension is still applied to the tape 20, so that taping is performed with a stronger adhesion to the side surface 12. At this time, the separation membranes 15 disposed longer than the electrode plate 14 are compressed so that the side surfaces 12 of the jelly roll 10 are in close contact with each other, so that taping may be performed. Thereafter, the head part 240 is raised to a height in which the lowermost end of the pressing roller 242 coincides with the upper surface of the jelly roll 10, and then the head part 240 is advanced so that the tape 20 is applied to the upper surface 13. Is attached (Fig. 6(c)). Thereafter, when the tape 20 is attached to the upper surface 13 by moving forward a predetermined distance, the tape 20 is cut by driving the cutting unit 250. Thereafter, the head part 240 is placed in its original position to prepare the tape 20 to be attached to the next jelly roll 10. In the case of attaching the tape 20 in this way, since the tape 20 can be attached while providing a certain tension when attaching the tape 20 to the lower surface 11, the side surface 12, and the upper surface 13, the jelly It is possible to narrow the gap inside the roll 10 so as to be in close contact, and to perform taping with a strong fixing force.

7 is a conceptual diagram showing the difference between the adhesive height and the end height of the tape.

As shown, the tape attaching apparatus according to the present invention adjusts the height of each taping unit 200 according to the thickness of the jelly roll 10 when taping is performed. When the three taping units 200 are provided as shown in FIG. 7(a), the taping units 200 provided on both sides increase to the same height d2 when taping on the side surface 12 to perform taping. The taping of the middle portion may be raised to a height lower than that of the taping units 200 provided on both sides to perform taping on the side surfaces 12.

As an example related to height control, the taping of the lower surface 11 may be performed at the same height as shown in FIG. 7 (b), but the taping height of the upper surface 13 may be lowered only in the middle portion d1. That is, the control unit may function so that the heights of the plurality of taping units 200 are independently controlled.

8 is a diagram showing a concept in which an attachment start height and an attachment end height of a tape are set differently.

As another example, as shown in FIG. 8, in the middle part, the taping height of the lower surface 11 may be performed at a position higher than that of the taping regions on both sides, and the taping height of the upper surface 13 may be performed at a height lower than both sides. . In the above-described FIGS. 7(b) and 8, when taping the side surface 12, the rising distance d1 of the middle portion and the rising distance d2 of the portion adjacent to the curved portion may be the same, and each side (12) The taping area can also be the same area.

On the other hand, the above-described embodiment has been described as an example in which a tape attaching device is provided on one side of the jelly roll, but by applying this, the tape attaching device is configured as a pair and can be applied as a device that simultaneously taps on both sides of the jelly roll. .

Hereinafter, a method of attaching a tape for a jelly roll for a secondary battery according to the present invention will be described in detail with reference to FIG. 9.

9 is a sequence of a method for attaching a tape for a jelly roll for a secondary battery according to another embodiment of the present invention.

As shown, the method of attaching a tape for a jelly roll for a secondary battery according to the present invention includes a first tape attaching step (S100), a second tape attaching step (S200), a third tape attaching step (S300), and a cutting step (S400). It can be configured to include.

The first tape attaching step (S100) corresponds to a step of attaching one end of the tape unwound from the tape reel to the first surface of the jelly roll. Here, the first surface may be a lower surface. The first tape attaching step (S100) is performed by attaching a plurality of tapes unwound from a plurality of tape reels to a plurality of points of the jelly roll spaced at predetermined intervals.

The first tape attaching step (S100) may include a step of moving the head portion forward (S110), a step of raising (S120), and a step of moving backward (S130).

The step of moving the head forward (S110) corresponds to a step of moving the head temporarily fixing the tape toward the jelly roll side. Here, the head portion enters the lower side of the jelly roll, and the tape is temporarily fixed so that the upper side becomes the adhesive surface of the tape.

In the step of raising the head (S120), the head is moved upward from the lower side of the jelly roll toward the lower side, and the tape is attached to the first side.

The backward moving step (S130) corresponds to a step of attaching the tape to the first side of the head and then preparing the ascent for attaching to the second side. In the rearward movement step S130, when ascending, the jelly roll may be moved rearward by a distance that does not interfere with movement of the head unit. In other words, the head portion is moved to the rear so that the end of the head portion escapes the vertical lower region of the jelly roll. Here, the lower region refers to a region in which the electrode of the jelly roll is disposed, and a separator may not be included.

The second tape attaching step (S200) is a step of performing taping on the second surface by raising the head portion after the attachment of the taping to the first surface is completed. When the tape is attached, the tape is connected continuously from the tape reel, and tension is generated in the tape itself by the torque acting on the tape reel. Therefore, in the second tape attaching step, the tape is taped on the side while the jelly roll is compressed upward by a large tension on the tape. Here, the second tape attaching step (S200) may be performed by varying at least one distance raised in the vertical direction. The distance raised in the vertical direction can be determined depending on the structural characteristics of the jelly roll. That is, the rising distance may be increased in the taping area formed on the curved portion side, and the second tape attaching step (S200) may be performed by setting the rising height smaller than the above-described curved portion in the center portion of the jelly roll.

In the third tape attaching step (S300), after taping is performed on the second surface, taping is performed on the third surface provided on the opposite side to the first surface. In the third taping step S300, taping is performed by moving the head portion forward.

The cutting step (S400) corresponds to a step of cutting and finishing the tape after attaching the tape to the third surface.

After the cutting step (S400), it returns to its original position to prepare the tape for the next jelly roll.

Meanwhile, the tape attaching apparatus and method described above describe the taping path starting with the first side as the lower side and leading to the third side, the upper side. It is also possible to change the embodiment to be carried out as a path to the lower surface.

The tape attaching device and the tape attaching method for the secondary battery jelly roll described above perform taping while providing tension, so that the tape can be firmly attached while pressing the jelly roll.

In addition, since the present invention performs taping in consideration of the difference in partial thickness of the jelly roll, it is possible to firmly attach the tape while preventing damage to the jelly roll.

10: jelly roll
11: lower side of jelly roll 12: side cross-section of jelly roll
13: upper surface of the jelly roll 14: electrode plate
15: separator
20: tape
101: first base 102: second base
200: taping unit
210: frame
220: tape supply unit
230: tape reel
231: torque limiter 232: guide roller
240: head part 241: vacuum chuck
242: pressing roller 250: cutting part
251: cutting blade 252: cutting actuator
253: tape clamp 254: pressure plate
255: clamping actuator
260: transfer block
270: lifting unit
280: sensor unit
410: interval control unit
411: interval control block
412: gap control actuator
413: pin actuator 414: pin
414a: pinhole
415: horizontal position fixing clamp
416: limiter
417: guide rod
420: transfer unit 421: linear guide

Claims (16)

In the device for attaching the tape to the compressed secondary battery jelly roll after being wound,
A first base;
A plurality of taping units configured to reciprocate on the first base toward the jelly roll; And
And a control unit configured to control the operation of the plurality of taping units,
Each taping unit,
A tape reel mounting portion configured to attach and detach the tape roll wound in the form of a tape;
A head portion configured to temporarily fix the distal end side of the tape unwound from the tape reel and attach the tape to the jelly roll by pressing the tape;
An elevating unit configured to elevate the head portion;
And a cutting part configured to cut the tape at one side of the head part when the tape is attached to the jelly roll,
The control unit controls each of the operations of the plurality of taping units so that the taping position can be independently adjusted,
The control unit controls the plurality of lifting units so that at least one of the plurality of heads has a different lifting distance. delete The method of claim 1,
The control unit controls the plurality of lifting units so that the lifting distance of the head part attaching the tape to the taping point closest to the curved part of the compressed secondary battery jelly roll among the plurality of head parts can be increased. Tape attaching device for secondary battery jelly roll. The method of claim 1,
The control unit controls the plurality of taping units so that the taping area attached to the side surface of the jelly roll can be changed. The method of claim 4,
The control unit is a tape attaching device for a secondary battery jelly roll, characterized in that the tape attachment area in the middle of one side of the jelly roll is configured to have a height smaller than that of the other tape attachment areas. The method of claim 4,
The control unit,
Controlling the lifting unit so that the height at the start of attaching the tape to the jelly roll at a plurality of taping positions is the same,
A tape attaching apparatus for a secondary battery jelly roll, characterized in that controlling the lifting unit so that at least one height at the end of attaching the tape to the jelly roll at the plurality of taping positions may be different. The method of claim 4,
The control unit,
Controlling the lifting unit so that at least one of the heights at the start of attachment of the tape at the plurality of taping positions may be different,
A tape attaching apparatus for a secondary battery jelly roll, characterized in that for controlling the lifting unit so that the height at the end of attaching the tape at the plurality of taping positions is the same. The method of claim 1,
A second base configured to support the plurality of taping units and provided on the first base to be reciprocated toward the jelly roll; And
A tape attaching device for a secondary battery jelly roll further comprising a transfer unit configured to reciprocate the second base with the first base. The method of claim 8,
Each of the taping units,
A transfer block supported by the second base;
Further comprising a frame configured to be lifted from the transfer block,
The elevating unit is configured to elevate the frame,
The head part, the cutting part, and the tape reel mounting part are provided on the frame. The method of claim 8,
The plurality of taping units are configured to be spaced apart from each other on the second base,
A tape attaching device for a secondary battery jelly roll, further comprising a gap adjusting unit configured to adjust the gap between the plurality of taping units. The method of claim 10,
A tape attaching device for a secondary battery jelly roll further comprising a plurality of horizontal position fixing clamps provided in each of the taping units and configured to selectively fix the position of the taping unit. The method of claim 1,
The taping unit further comprises a sensor unit configured to check the presence or absence of the tape on the path of the tape unwound from the tape reel to the head unit. In the method of attaching the tape to the compressed secondary battery jelly roll after being wound,
A first tape attaching step of simultaneously attaching one end of each tape unwound from a plurality of tape reels to a plurality of points spaced apart at predetermined intervals on the first surface of the jelly roll;
The tape is unwound from the plurality of tape reels as the tape attachment area is extended to the second side, which is the side of the jelly roll, and at least one of the plurality of tape attachment areas on the second side may have a different tape attachment length. A second tape attaching step of independently adjusting the vertical movement distances of the plurality of taping units;
A third tape attaching step of extending a tape attaching area to a second surface opposite to the first surface; And
Tape attaching method for a secondary battery jelly roll comprising a tape cutting step of cutting each of the plurality of tapes. The method of claim 13,
The step of attaching the first tape,
A forward moving step of entering the head of the taping unit into the vertical lower region of the jelly roll is performed,
Raising the head portion so that one end of the tape mounted on the head portion is attached to the first surface in an upward direction; And
And a rearward moving step of moving the head to the rear so that the end of the head part is out of the vertical lower area of the jelly roll. The method of claim 14,
The step of attaching the second tape,
A tape attaching method for a secondary battery jelly roll, comprising attaching a tape to a region including a curved portion among the plurality of tape attachment points with a longer length. The method of claim 14,
The step of attaching the second tape,
A method of attaching a tape for a jelly roll for a secondary battery, characterized in that when the tape is unwound from the tape reel, the head is raised in a state in which a predetermined range of tension is generated.

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