Rewinding device for secondary battery electrode manufacturing process

Abstract

To provide a rewinding device that includes a turret that includes first and second winding cores for rewinding up raw rolls used in a secondary battery electrode manufacturing process, a support member that is positioned on the opposite side of the second winding core across a stopped raw roll that is fully rewound around the first winding core and is arranged to move toward the stopped raw roll side to be placed at a working position or to move in the opposite direction from the working position to be placed at a standby position, an adsorption roll that is rotatably connected to the support member and adsorbs an adhesive tape, and a cutter that is connected to the support member so as to be able to move back and forth in the width direction of the stopped raw roll.SOLUTION: When the support member is in the working position, the cutter cuts the stopped raw roll sandwiched between the adsorption roll and the second winding core, separating it into a recovery portion rewound onto the first winding core and a winding portion to be rewound onto the second winding core, and the adsorption roll is rotated by the second winding core which rotates in the reverse direction, causing the adhesive tape to be adhered to the end of the winding portion and to the second winding core.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a winding device for a secondary battery electrode manufacturing process that can be used in various processes for manufacturing secondary battery electrodes, and more particularly, to a winding device for a secondary battery electrode manufacturing process that automatically winds a raw roll onto another empty winding core when the winding core that is currently winding the raw roll becomes full. [Background technology]

[0002] Secondary batteries are rechargeable batteries and are used as batteries in various devices such as mobile phones, laptops, camcorders, automobiles, etc. Secondary batteries have a structure in which prefabricated electrodes (positive and negative electrodes) and separators are alternately stacked, for example, a stacked structure of positive electrode (negative electrode) / separator / negative electrode (positive electrode) / separator / positive electrode (negative electrode).

[0003] The process for manufacturing electrodes (positive and negative electrodes) of the secondary battery as described above generally includes a coating process, a roll press process, a slitting process, a notching process, and a drying process, and each process is performed by a roll-to-roll method. Therefore, in each process, an unwinding device is used to unwind the raw roll before the process (raw roll for coating, raw roll for roll press, raw roll for slitting, raw roll for notching, raw roll for drying) and a winding device is used to wind the raw roll after the process. In addition, in the winding device of each process, when any winding core that has previously wound the raw roll is full, the raw roll needs to be wound onto another empty winding core. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Korean Patent No. 10-2215456 [Patent Document 2] Korean Patent No. 10-1960629 [Patent Document 3] Korean Patent No. 10-1752731 [Patent Document 4] Korean Patent No. 10-1774445 Summary of the Invention [Problem to be solved by the invention]

[0005] Therefore, the present invention provides a technique for automating the above-mentioned operations required in a winding device in a process for manufacturing electrodes (positive and negative electrodes) for secondary batteries. [Means for solving the problem]

[0006] The present invention provides a winding device for a manufacturing process of secondary battery electrodes, comprising: a turret including a first winding core and a second winding core for winding up a raw web used in the manufacturing process of secondary battery electrodes; a support member that is fully wound around the first winding core and is located on the opposite side of the second winding core across the stopped raw web, and is arranged to move toward the stopped raw web and be placed at a working position or to move in the opposite direction from the working position and be placed at a standby position; an adsorption roll that is rotatably connected to the support member and adsorbs an adhesive tape; and a cutter that is connected to the support member so as to be able to reciprocate in the width direction of the stopped raw web. When the support member is in the working position, the stopped web is sandwiched between the suction roll and the second winding core, and the cutter cuts the stopped web sandwiched between the suction roll and the second winding core, separating it into a recovery portion wound onto the first winding core and a winding portion to be wound onto the second winding core, and the suction roll is rotated by the second winding core which rotates in the reverse direction, and the adhesive tape is adhered to the end of the winding portion and to the second winding core.

[0007] The support member may be coupled to a suction plate located adjacent to the cutter and another cutter located on the opposite side of the suction plate from the cutter, in which case, when the support member is in the working position, the suction plate suctions the stop web, and the other cutter cuts the stop web together with the cutter to separate the sample site suctioned to the suction plate from the collection site.

[0008] The suction plate is connected to the support member so as to be movable back and forth in the width direction of the stop web.

[0009] The winding device for the manufacturing process of the secondary battery electrode may further include an automatic adhesive tape feeder, which automatically performs the processes of forming an adhesive tape web wound around an adhesive tape web roll located on one side of the suction roll in the longitudinal direction (width direction of the stop web) from the adhesive tape, and positioning the adhesive tape within the suction area of ​​the suction roll with the adhesive surface facing outward. Effect of the Invention

[0010] According to the present invention, the operation of adhering a roll of raw material wound around a full winding core to an empty winding core with adhesive tape having an adhesive surface on only one side can be performed automatically in a winding device for the manufacturing process of secondary battery electrodes.

[0011] Furthermore, according to the present invention, there is an effect that samples of the original sheets that have been subjected to the secondary battery electrode manufacturing process can be automatically collected.

[0012] Furthermore, according to the present invention, there is an effect that the adhesive tape can be automatically attracted to the suction area of ​​the suction roll. [Brief description of the drawings]

[0013] [Figure 1] 1 shows a winding device for a manufacturing process of a secondary battery electrode according to the present invention. [Diagram 2]2 is a diagram for explaining the operation process of the winding device shown in FIG. 1. [Diagram 3] 2 shows an operation process of an automatic adhesive tape supplying device for automatically supplying the adhesive tape of FIG. 1 to an adsorption roll. [Figure 4] Same as above. [Diagram 5] Same as above. [Figure 6] Same as above. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, preferred embodiments of a winding device for a manufacturing process of a secondary battery electrode according to the present invention will be described in detail with reference to the drawings. Terms and words used below should not be interpreted as being limited to their ordinary or dictionary meanings, but should be interpreted as meanings and concepts that correspond to the technical ideas of the present invention based on the principle that the inventor can appropriately define the concepts of terms in order to best describe his / her invention.

[0015] The winding device 100 for the manufacturing process of secondary battery electrodes according to the present invention is provided at the end (the front end in the case of FIG. 1 ) of a manufacturing process line for secondary battery electrodes (such as a coating process line, a roll press process line, a slitting process line, a notching process line, etc.) for winding up the raw material roll 10 used in the process, and includes a turret 200, a support member 300, an adsorption roll 320, a cutter 330, an adsorption plate 340, and another cutter 350.

[0016] 1, the turret 200 includes a first winding core 210 and a second winding core 220 that are spaced apart from each other by 180 degrees and can be rotated independently by a motor (not shown) about rotation axes 212 and 222. The turret 200 can also rotate by itself about a central axis 202 by a motor (not shown), and when this rotation occurs, the positions of the two winding cores 210 and 220 are changed. The turret 200 is also provided with a guide roll 230.

[0017] The raw web 10 used in the manufacturing process of secondary battery electrodes is always wound around the first winding core 210, moving from rear to front. At this time, the first winding core 210 is located at the 9 o'clock position in FIG. 1, and the second winding core 220 is located at the 3 o'clock position (not shown). Then, when the first winding core 210 is fully wound, the turret 200 rotates counterclockwise around the central axis 202, and the first winding core 210 is located at the 3 o'clock position and the second winding core 220 is located at the 9 o'clock position as shown in FIG. 1. Then, the winding (rotation) of the first winding core 210 stops, and the raw web 10 stops.

[0018] 1, the support member 300 is located on the opposite side of the second winding core 220 across the stopped web 10. The support member 300 has a left end slidably connected to a pair of LM guides 314 and a right end slidably connected to a pair of LM guides (not shown), and is connected to a cylinder rod of a cylinder 312. The LM guides 314 and the cylinder 312 are fixed to a frame (not shown) that forms the overall frame of the winding device 100.

[0019] When the cylinder 312 is operated, the support member 300 moves toward the stationary web 10 and is disposed at the working position, or moves in the opposite direction (away from the stationary web 10) from the working position and is disposed at the standby position. Fig. 1 shows the support member 300 disposed at the standby position. Note that, although Fig. 1 shows the support member 300 moving between the standby position and the working position by a linear reciprocating motion, the support member 300 may be configured to move between the standby position and the working position by a pendulum motion (not shown).

[0020] The suction roll 320 is connected to the support member 310 so as to rotate about a rotation axis extending in the left-right direction (width direction of the original web). The suction roll 320 suctions the adhesive tape 40 with its adhesive surface facing outward. Fig. 1 shows the adhesive tape 40 suctioned in the 12 o'clock direction.

[0021] The cutter 330 is fixed to a left-right advancement block 332, and the other cutter 350 is similarly fixed to a left-right advancement block 352. The left-right advancement blocks 332 and 352 are coupled to the support member 300 so as to be able to reciprocate left and right at a distance from each other, and simultaneously advance left or right when a predetermined driving means (cylinder, motor, etc.) fixed to the support member 300 is operated.

[0022] The suction plate 340 has one surface serving as an suction surface, and is positioned between the cutter 330 and another cutter 350 so as to be adjacent to the cutters 330 and 350, and is coupled to the support member 300 so as to be movable back and forth in the left and right direction.

[0023] The winding device 100 as described above is operated in the state shown in FIG. 1, i.e., the web 10 is fully wound around the first winding core 210 located at the 3 o'clock position and stopped, and the second winding core 220 is located at the 9 o'clock position. The process will be described below with reference to FIG. 2.

[0024] First, the support member 300, which was in the standby position, moves to the working position. As a result, the suction roll 320 presses the stopped raw web 10 and brings it into contact with the second winding core 220, and the cutters 330, 350 located at the left end (or right end) of the support member 300 move to the left (or right) side of the stopped raw web 10 without being interfered with by the stopped raw web 10, and the suction surface of the suction plate 340 comes into contact with the stopped raw web 10, exerting an suction force.

[0025] Therefore, when the support member 300 is in the working position, as shown in Figure 2(a), the stopped raw web 10 is sandwiched between the suction roll 320 and the second winding core 220, and the stopped raw web 10 in this sandwiched state is adsorbed to the suction plate 340 and at the same time the cutters 330, 350 are positioned on the left (or right) side.

[0026] After the support member 300 moves to the working position, the cutter 330 moves to the right (or left), which separates the stopped raw web 10 sandwiched between the suction roll 320 and the second winding core 220 into a recovery portion 14 wound around the first winding core 210 and a winding portion 12 wound around the second winding core 220, as shown in Figure 2(b), and the recovery portion 14 is separated into a sample portion 14b adsorbed to the suction plate 340 and the remaining portion 14a.

[0027] When the cutter 330 has completed moving to the right (or left), as shown in (b) of Fig. 2, the second winding core 220 rotates in the reverse direction (rotates in the opposite direction to the direction in which the web 10 is wound), causing the suction roll 320 to rotate in the opposite direction to the second winding core 220. In addition, when the adhesive surface of the adhesive tape 40 is adhered to the end (front end) of the winding area 12, the rotating suction roll 320 releases the suction force and continues to rotate, causing the adhesive tape 40 to be adhered to the end (front end) of the winding area 12 and the second winding core 220, as shown in the enlarged view of (b) of Fig. 2.

[0028] After the end (front end) of the winding portion 12 is adhered to the second winding core 220 as described above, the support member 300 returns to the standby position, the first winding core 210 winds up the remaining portion 14a of the collection portion 14, and the second winding core 220 rotates forward as shown in Fig. 2(c) to wind up the winding portion 12. When the support member 300 returns to the standby position, the suction plate 340 moves left (or right) and pulls out the sample portion 14b of the collection portion 140 to the outside, and then releases the suction force, at which point the operator can easily collect the sample portion 14b.

[0029] Although it has been described above that the winding device 100 is provided with an adsorption plate 340 and another cutter 350, if collection of the sample site 14b is not required, the adsorption plate 340 and another cutter 350 do not need to be provided.

[0030] Meanwhile, as described above, the adhesive tape 40 is adsorbed to the adsorption roll 320, and the winding device 100 according to the present invention may further include an automatic adhesive tape supplying device 400 for automatically adsorbing the adhesive tape 40 to the adsorption roll 320. Hereinafter, the automatic adhesive tape supplying device 400 will be described with reference to FIGS. 3 to 6.

[0031] The automatic adhesive tape supply device 400 is installed on a frame (not shown) that forms the overall frame of the winding device 100 so as not to interfere with the movement of the support member 310. In addition, the automatic adhesive tape supply device 400 may include an adhesive tape original roll 410, a payout roll 420, a suction table 460, a reciprocating roller 440, and a cutter 450.

[0032] The adhesive tape original roll 410 is an idle roller located on one side of the suction roll 320 in the left-right direction (shown on the left side in Figs. 3 to 6), and has an adhesive tape original roll 42 wound thereon to become the adhesive tape 40. The adhesive tape original roll 410 is rotatably supported by the frame (not shown).

[0033] The suction table 460 is fixedly supported by the frame (not shown) so as to be positioned between the adhesive tape original roll 410 and the suction roll 320, has one surface (shown as the upper surface in Figs. 3 to 6) as an suction surface, and is provided with a cut groove 462 extending back and forth in the center of the suction surface. In addition, the suction surface of the suction table 460 does not form a step with respect to the outer surface of the suction roll 320.

[0034] The pay-out roll 420 is located between the adhesive tape original roll 410 and the adsorption table 460, rotated by a motor (not shown), and rotatably supported by the frame (not shown). The pay-out roll 420 is provided so that, when it rotates, it can pull the adhesive tape original roll 42 wound around the adhesive tape original roll 410 and supply it to the adsorption table 460, and an adsorption roll can be used as the pay-out roll 420. The adhesive tape original roll 42 supplied by the pay-out roll 420 takes a position in which the adhesive surface faces the outside of the adsorption roll 320 (upward in Figs. 3 to 6).

[0035] The reciprocating roller 440 is coupled to a rail 430 so as to move left and right between an initial position and a final position when a motor (not shown) is operated. The rail 430 is fixed to the frame (not shown) and extends left and right above the suction roll 320. A member indicated by reference numeral 440a is a cylinder for raising and lowering the reciprocating roller 440 up and down.

[0036] The reciprocating roller 440 in the initial position contacts the left side portion of the adsorption surface (meaning the adsorption surface of the adsorption table 460) located on the left side of the cutting groove 462, and then, as it moves to the right, it sequentially contacts the right side portion of the adsorption surface located on the right side of the cutting groove 462 and the surface of the adsorption roll 320, and then is separated from the adsorption roll 320 and moves right to the final position.

[0037] When a brake (not shown) is activated, the reciprocating roller 440 cannot rotate, and when the brake (not shown) is not activated, the reciprocating roller 440 can rotate. As such a brake, a brake pad (not shown) that includes an air pressure cylinder (not shown) that moves together with the reciprocating roller 440 and a brake pad (not shown) that presses or does not press the surface of the reciprocating roller 440 by the air pressure cylinder (not shown) can be used.

[0038] The cutter 450 is connected to a rail 430. The cutter 450 is provided so as to be able to enter and exit a cutting groove 462 of a suction table 460 while being raised and lowered by an air pressure cylinder 452, and the air pressure cylinder 452 is connected to the rail 430 so as to be able to perform a linear reciprocating motion by a motor or the like.

[0039] The operation of the above-mentioned automatic adhesive tape supplying device 400 is as follows.

[0040] Initially, as shown in FIG. 3, an end of the adhesive tape original roll 42 wound around the adhesive tape original roll 410 is adsorbed to the left side of the adsorption surface of the adsorption table 460, and the reciprocating roller 440 is placed in the initial position and adhered to the adhesive surface of the end of the connected adhesive tape original roll 42.

[0041] Thereafter, the reciprocating roller 440 makes a primary movement (to the right) by a preset distance, resulting in the state shown in Fig. 4. During the primary movement, the suction force of the suction table 460 continues to be maintained, the reciprocating roller 440 cannot rotate due to the operation of the brake, and the end of the adhesive tape original roll 42 adhered to the reciprocating roller 440 is pulled by the reciprocating roller 440 and becomes located within the suction area of ​​the suction roll 320, as shown in Fig. 4. Here, the suction area of ​​the suction roll 320 means the area where the air intake holes 322 are located.

[0042] During the primary movement, the pay-out roll 420 rotates and the adhesive tape roll 42 is supplied to the right side. At this time, the rotational speed of the pay-out roll 420 is controlled so that the supply speed of the adhesive tape roll 42 is the same as the movement (rightward) speed of the reciprocating roller 440. This is to reliably prevent the reciprocating roller 440 from being able to pull the end of the adhesive tape roll 42 and moving (rightward) on its own.

[0043] When the primary movement as described above is performed, the payout roll 420 stops, the suction at the suction table 460 continues, and suction at the suction roll 320 also starts. After that, as shown in Fig. 4, the adhesive tape original roll 42 is cut by the cutter 450 on the suction table 460 to form the adhesive tape 40. Suction at the suction roll 320 may start from the time of the primary movement.

[0044] After the adhesive tape 40 is formed through the above process, the reciprocating roller 440 makes a secondary movement (rightward) by a preset distance, resulting in the state shown in Fig. 5. During the secondary movement, the payout roll 420 remains stopped, the suction force of the suction table 460 is maintained, the cut end of the adhesive tape roll 42 continues to be attracted to the suction table 460, the reciprocating roller 440 still cannot rotate due to the operation of the brake, and the end (right end) of the adhesive tape 40 adhered to the reciprocating roller 440 moves rightward, pulled by the reciprocating roller 440. When this secondary movement is made, both ends (left and right ends) of the adhesive tape 40 are positioned in the suction areas of the suction roll 320.

[0045] Even when the secondary movement is performed, the reciprocating roller 440 does not stop but continues to move to the right and separates from the adsorption roll 320, and then stops moving to the right when it reaches the final position as shown in Fig. 6. Also, as soon as the secondary movement is completed, the brake is released, and the reciprocating roller 440 moves to the right while rotating from this point until it separates from the adsorption roll 320. If the reciprocating roller 440 cannot rotate even after the secondary movement, the adhesive tape 40 will continue to be pulled by the reciprocating roller 440 and will leave the adsorption area of ​​the adsorption roll 320. On the other hand, if the brake is released as soon as the secondary movement is completed and the reciprocating roller 440 is made rotatable, the reciprocating roller 440 will be separated from the adhesive tape 40 adsorbed to the adsorption area of ​​the adsorption roll 320 and will move to the right.

[0046] The reciprocating roller 440 at the final position is raised by the cylinder 440a, and then moves (to the left) vertically above the initial position to wait. Also, after the adhesive tape 40 of the suction roll 320 is used to connect the winding portion 12 and the second winding core 220, it descends to the initial position, and the state shown in FIG. 3 is formed again.

[0047] As described above, the present invention has been described using limited embodiments and drawings, however, the present invention is not limited thereto, and a person having ordinary knowledge in the technical field to which the present invention belongs can make various modifications and variations within the technical spirit of the present invention and the equivalent scope of the claims described below, and the above-mentioned embodiments can be combined in various ways. [Explanation of symbols]

[0048] 10 Original fabric 12 Winding area 14 Retrieval site 14a Remaining part of the retrieval site 14b Sample site of collection site 40 Adhesive Tape 42 Adhesive tape roll 100 Winding device for manufacturing process of secondary battery electrodes 200 Turret 210 First winding core 220 Second winding core 300 Support member 312 Cylinder 314 LM Guide 320 Adsorption Roller 330 Cutter 340 Adsorption plate 350 Other cutters 400 Automatic adhesive tape supply device 410 Adhesive tape roll 420 Payout roll 430 Rail 440 Reciprocating Roller 450 Cutter 460 Suction Table

Claims

1. A turret including a first winding core and a second winding core for winding up a raw sheet used in a manufacturing process of a secondary battery electrode; a support member that is positioned on the opposite side of the second winding core across the stopped web that has been fully wound around the first winding core, and that is arranged to move toward the stopped web and be disposed at a working position, or to move in the opposite direction from the working position and be disposed at a standby position; an adsorption roll rotatably coupled to the support member and adsorbing the adhesive tape; a cutter coupled to the support member so as to be capable of reciprocating in the width direction of the stop web, When the support member is in the working position, the stopped web is sandwiched between the suction roll and the second winding core, and the cutter cuts the stopped web sandwiched between the suction roll and the second winding core to separate it into a recovery portion that is wound around the first winding core and a winding portion that is wound around the second winding core, and the suction roll is rotated by the second winding core which rotates in the reverse direction, and the adhesive tape is adhered to the end of the winding portion and to the second winding core.

2. The support member is connected to a suction plate located adjacent to the cutter and another cutter located on the opposite side of the suction plate from the cutter, 2. The winding device for a manufacturing process of a secondary battery electrode as described in claim 1, wherein when the support member is in the working position, the suction plate adsorbs the stopped raw roll, and the other cutter cuts the stopped raw roll together with the cutter to separate the sample portion adsorbed to the suction plate from the recovery portion.

3. 3. The winding device for a secondary battery electrode manufacturing process according to claim 2, wherein the suction plate is coupled to the support member so as to be reciprocable in the width direction of the stopped web.

4. 2. The winding device for a secondary battery electrode manufacturing process according to claim 1, further comprising: an automatic adhesive tape supplying device that automatically performs a process of forming an adhesive tape web wound around an adhesive tape web roll located on one side of the suction roll in a longitudinal direction (width direction of the stopped web) with the adhesive tape, and positioning the adhesive tape within the suction area of ​​the suction roll so that an adhesive surface of the adhesive tape faces outward.

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