WO2023038208A1

WO2023038208A1 - Electrode plate high speed stacking device for zigzag-shaped secondary battery

Info

Publication number: WO2023038208A1
Application number: PCT/KR2021/019588
Authority: WO
Inventors: 배일수; 이진우
Original assignee: 주식회사 바에솔
Priority date: 2021-09-13
Filing date: 2021-12-22
Publication date: 2023-03-16

Abstract

The present invention relates to a device for manufacturing a stacked-type secondary battery. A device for manufacturing a secondary battery according to the present invention may have a stacking table fixed thereto and change paths of separators in the process of transferring a positive electrode plate and a negative electrode plate to the stacking table, and thus can simultaneously perform zigzag stacking of the separators and stacking of electrode plates. In addition, at this time, the rapidly changing tension and transfer speed of the separators are configured to be actively controllable. An electrode plate high speed stacking device for a zigzag-shaped secondary battery according to the present invention can perform stacking while fixing a stacking table, and thus can fundamentally prevent problems caused by inertia, which occur when the stacking table is moved. In addition, the tension of the continuously provided separators can be actively adjusted in response to an operation of an electrode picker, and thus precision can be improved.

Description

Electrode plate high-speed stacking device for zigzag type secondary battery

The present invention relates to a high-speed stacking device for electrode plates of a zigzag type secondary battery, and more particularly, to a device capable of manufacturing a secondary battery by laminating positive and negative electrode plates of a predetermined size together with a separator.

A secondary battery refers to a battery that converts chemical energy into electrical energy to supply power to the outside and receives power from the outside during discharge and stores it as chemical energy. It refers to a battery that supplies power to an external circuit and can store electricity by converting electrical energy into chemical energy by receiving external power when it is discharged.

The secondary battery may be classified into a winding type and a stacked type depending on the shape. The winding type may be produced by manufacturing one electrode assembly (jelly roll) by continuously winding a positive electrode plate, a negative electrode plate, and a separator together. The laminated type is created by alternately stacking positive and negative plates cut to a predetermined size with a separator interposed therebetween.

Conventionally, when manufacturing a stacked secondary battery, a method of alternately stacking positive and negative plates while reciprocating a stacker at a predetermined distance has been mainly used. In this regard, Korean Registered Patent No. 1280069 has been disclosed. However, in this conventional method, as the electrode plates are gradually stacked, inertia due to the reciprocating motion of the stacker and accumulation errors due to repeated motion occur, resulting in a problem in that the position of the stacked electrode plate stack is distorted. This tendency increases inertia as electrode plates increase in size and cell length, and consequently, positional defects of the stacked electrode plates also increase.

In addition, as the stacker reciprocates, the direction of the tension acting on the separator is reversed at the point where the direction is changed, and the tension of the separator may be momentarily lost. As a result, fluttering of the separator occurs, and a change occurs in the position of the stacked electrode plates, which should be fixed in position. As a result, a problem of quality deterioration due to electrode plate position error also occurs.

An object of the present invention is to provide a high-speed stacking device for electrode plates of a zigzag type secondary battery to solve the problems of a conventional stacked type secondary battery manufacturing device.

As a means for solving the above problems, a first magazine seating portion configured to load a plurality of positive plates, a second magazine seating portion configured to load a plurality of negative electrode plates, the first magazine seating portion and the second magazine seating portion A stacking table provided in between, a separator supply unit configured to supply the wound separator to the stacking table while unwinding, a first electrode picker configured to pick up the positive electrode plate and place it on the stacking table, and pick up the negative plate and place it on the stacking table. The second electrode picker and the first electrode picker, which are configured to do so, push the separator while transferring the positive electrode plate in the first direction and seat it on the top surface of the stacking table, and the second electrode picker moves the negative electrode plate in the first direction. An apparatus for high-speed stacking of electrode plates of a zigzag type secondary battery may be provided, which is configured to seat the separator on the uppermost surface of electrode assemblies stacked on a stacking table while pushing the separator during the transfer process in the second direction.

On the other hand, it may include a sepa feeder provided in the transfer path of the separator and configured to adjust the tension of the separator in response to the first electrode picker or the second electrode picker pushing the separator.

Meanwhile, the sepa feeder may be configured to be pulled in the transport direction of the separator as the first electrode picker moves in a first direction or the second electrode picker moves in a second direction.

In addition, the sepa feeder may further include a first clamp and a second clamp configured to selectively clamp the separator.

Furthermore, the first clamp and the second clamp may be configured to independently reciprocate along the pulling direction of the separator.

Meanwhile, the first clamp and the second clamp may be configured to alternately clamp and pull the separator.

Meanwhile, the first clamp and the second clamp may be configured to pull the separator in a vertical direction.

Meanwhile, the first clamp and the second clamp may be configured to pull the separator in the left and right directions.

In addition, the final traction speed of the first clamp and the second clamp may be controlled to be faster than the initial traction speed within one traction operation.

Meanwhile, it may include a tension control unit provided at a point after the sepa feeder in the transfer path of the separation membrane and configured to adjust the tension of the separation membrane by adjusting the movement distance in a direction perpendicular to the transfer path of the separation membrane.

Meanwhile, the stacking table has a fixed lower side, and the first electrode picker and the second electrode picker may be controlled to place the positive electrode or negative electrode plate on the placing area provided on the upper side of the stacking table.

In addition, each of the first electrode picker and the second electrode picker may include a roller provided at a point in contact with the separator.

Meanwhile, the rollers of the first electrode picker and the rollers of the second electrode picker may be configured to push the separator in opposite directions.

Meanwhile, a first alignment unit provided between the first magazine seating unit and the stacking table and a second position alignment unit provided between the second magazine seating unit and the stacking table may be further included.

Meanwhile, the first electrode picker includes a pair of pick-up modules, one of the pair of pick-up modules transfers the positive plate from the first magazine seating part to the first alignment part, and the other of the pair of pick-up modules is 1 The positive plate is transferred from the alignment unit to the stacking table, and the pair of positive plates transferred from the pair of pick-up modules can be transferred simultaneously.

On the other hand, the first electrode picker is configured to be movable in a vertical direction by a predetermined distance, and can be configured to simultaneously pick up or place the positive plate in a pair of pickup modules.

In addition, a winder configured to hold the stacked jelly rolls on the stacking table and to be rotatably configured while holding the jelly rolls so as to wrap the outside of the jelly rolls with a separator may be further included.

In addition, the winder is a pair of winder links configured to grip and move the jelly rolls from the placing area of the stacking table, both sides of which are rotatably connected to the ends of the pair of winder links, It may further include a jelly roll gripper configured to be rotatable in a gripped state.

Meanwhile, a guide roller configured to temporarily support the separator may be further included when the winder grips the jelly roll and separates it from the placing area of the stacking table.

Meanwhile, the guide roller may move in the width direction of the separator and be configured to be positioned above the stacking table.

The apparatus for high-speed stacking of electrode plates of a zigzag type secondary battery according to the present invention can stack while fixing the stacking table, thereby fundamentally preventing problems caused by inertia occurring when the stacking table moves. In addition, the tension of the continuously provided separator can be actively adjusted in response to the operation of the electrode picker, thereby improving precision.

1 is a front view of a high-speed stacking device for electrode plates of a zigzag type secondary battery according to an embodiment of the present invention.

2 is an exploded perspective view in which a sepa feeder, an electrode picker, and a stacking table are disassembled into modules in a high-speed stacking device for electrode plates of a zigzag type secondary battery according to an embodiment of the present invention.

FIG. 3 is an enlarged perspective view of the sepa feeder and tension controller shown in FIG. 2;

4 is an enlarged perspective view of the electrode picker shown in FIG. 2;

FIG. 5 is an enlarged perspective view centering on the stacking table shown in FIG. 2 .

FIG. 6 is an exploded perspective view of each module centering on the stacking table shown in FIG. 2 .

7 is a front view of a sepa feeder and a tension control unit.

8 is an operating state diagram of the sepa feeder.

9 is an enlarged perspective view of a pick-up module and a roller of an electrode picker.

10 is a front view showing a modified example of a sepa feeder.

11a, 11b, 11c, 11d, 11e, and 11f are conceptual views illustrating a concept of an operation of stacking electrode plates on a stacking table.

12a, 12b, 12c and 12d are diagrams illustrating the concept of a separation membrane pulling operation of the sepa feeder.

13A is a view showing the position of the separator support roller and the state of the separator according to the electrode stacking operation of the one-time electrode picker.

FIG. 13B is a graph showing the speed of the separation membrane being pulled out during stacking on the stacking table.

14a, 14b, 14c, 14d and 14e are conceptual diagrams illustrating the operating speed of the first tension controller according to the operation of the electrode picker.

15A and 15B are conceptual views illustrating the operation concept of the tension control unit.

16a, 16b, 16c and 16d are operating state diagrams of the winder.

Hereinafter, an apparatus for high-speed lamination of electrode plates of a zigzag type secondary battery according to an embodiment of the present invention will be described in detail with reference to the drawings. In addition, in the description of the following embodiments, the name of each component may be called a different name in the art. However, if they have functional similarity and identity, even if a modified embodiment is employed, it can be regarded as an equivalent configuration. In addition, signs added to each component are described for convenience of description. However, the contents of the drawings in which these symbols are written do not limit each component to the scope in the drawings. Likewise, even if an embodiment in which the configuration in the drawings is partially modified is employed, it can be regarded as an equivalent configuration if there is functional similarity and identity. In addition, in light of the level of a general technician in the relevant technical field, if it is recognized as a component that should be included, the description thereof will be omitted.

1 is a front view of a high-speed lamination device for electrode plates of a zigzag-type secondary battery according to an embodiment of the present invention, and FIG. 2 is a front view showing a sepa feeder, an electrode picker, and stacking in the high-speed lamination device for electrode plates of a zigzag-type secondary battery according to an embodiment of the present invention. It is an exploded perspective view of the table by module.

1 and 2, in the high-speed stacking device for electrode plates of a zigzag type secondary battery according to the present invention, in a state in which the stacking table 600 is fixed, electrode plates are transported by a pair of electrode pickers and at the same time in a zigzag motion. It may be configured to stack secondary batteries while pushing the separation membrane 1100. Here, 'zigzag' refers to an operation of pushing the separator 1100 alternately by electrode pickers on the left and right sides of the separator 1100.

A high-speed stacking device for electrode plates of a zigzag type secondary battery according to an embodiment of the present invention includes a frame 100, a vertical plate 300, a separator supply unit, an electrode picker, a stacking table 600, a magazine seating unit, a pregazing table, and a location It may be configured to include a control unit, a sepa feeder 710, a tension control unit 720, and a winder.

The frame 100 is a base on which the high-speed stacking device for the electrode plates of the zigzag type secondary battery can be fixed. The frame 100 is formed by extending to a predetermined size and may include a plurality of members. A base 200 is formed on one side of the frame 100, and a stacking table 600, a position adjusting unit, and an electrode magazine may be provided on an upper surface of the base 200.

The vertical plate 300 may be formed to extend vertically from one side of the frame 100 . The vertical plate 300 may be provided with a separation membrane supply unit provided in a direction orthogonal to an extending plane.

The separator supply unit may be configured to take out the separator 1100 from the wound separator roll 410 and supply the separator 1100 to the stacking table 600 . The separator supply unit may include a separator roll mounting unit, a driving roller, and an idle roller.

The separation membrane roll holder 420 is configured to unwind and supply the separation membrane 1100 . One side of the separation membrane roll holder 420 is rotatably connected to the vertical plate 300, and a motor for rotating the separation membrane roll holder 420 may be provided at the other side of the vertical plate 300. The separation membrane roll holder 420 may be supplied by unwinding the separation membrane roll 410 at a predetermined speed while the electrodes are stacked. At this time, the rotational speed of the separation membrane roll holder 420 is controlled corresponding to the diameter that decreases as the separation membrane 1100 is used, so that the separation membrane 1100 can be unwound at an appropriate linear speed.

A driving roller and an idle roller may together determine a path along which the separator 1100 is transported. One side of the driving roller and the idle roller may be rotatably connected to the vertical plate. The driving roller is configured to actively control the line speed of the separation membrane 1100 while rotating. The idle roller minimizes frictional resistance and is configured to passively rotate while supporting the separator 1100 in the thickness direction. The idle roller supports the separation membrane 1100 so that it can be transported along the transport path. Meanwhile, although not shown, at least one of the driving roller and the idle roller is configured such that a relative angle to the vertical plate 300 can be adjusted. At least one of the driving roller and the idle roller adjusts the angle to correct the misalignment of the separator 1100 on the conveying path. At this time, when the angle is tilted, the conveyed separator 1100 naturally moves in the width direction due to gravity. Transfer can be made while adjusting the position.

Meanwhile, the separator roll 410 may be supplied in a state in which the separator 1100 and the protective film 1110 are wound together. At this time, the separator 1100 and the protective film 1110 are separated from the separator roll 410 and may move in different paths. As described above, the separator 1100 is finally transferred to the stacking table 600, and the protective film 1110 is transferred to the protective film reel unit 430 and wound up. However, matters related to the recovery of the protective film 1110 can be applied when the protective film is included in the separator reel 430, and can be omitted if the separator 1100 does not include the protective film 1110 .

The final stage of the transfer unit of the separation membrane 1100 may be configured to supply the separation membrane 1100 vertically above the stacking table 600 . That is, the separation membrane 1100 in a state in which the wire speed and tension are appropriately adjusted can be continuously drawn toward the stacking table 600 .

Meanwhile, although not shown, a sensor for measuring the linear velocity of the separator 1100 at a plurality of points may be included. Based on the value received from the sensor, the control unit (not shown) may drive a motor connected to the separator roll holder 420 and/or the driving roller to adjust or maintain a constant speed at which the separator 1100 is pulled out.

The electrode picker is composed of a pair, and each may be configured to pick up and transfer the electrode plate. A pair of electrode pickers may be provided on the left and right sides of the stacking table 600 to be described later. Meanwhile, in the following description, the left electrode picker in FIG. 1 will be referred to as the first electrode picker 510 and the right electrode picker will be referred to as the second electrode picker.

The first electrode picker 510 may be configured to pick up the positive electrode plate 1200 and transfer it to the stacking table 600, and the second electrode picker may pick up the negative electrode plate 1300 and transfer it to the stacking table 600. can The first electrode picker 510 and the second electrode picker may be provided symmetrically around the stacking table 600 . Meanwhile, the first electrode picker 510 and the second electrode picker are configured to operate while pushing the separator 1100 in opposite directions using ends facing each other. Meanwhile, the operation of the electrode picker will be described in detail later with reference to FIGS. 10A and 10B.

The stacking table 600 is configured to stack electrodes. The upper side of the upper surface of the stacking table 600 becomes a placing area, and stacking can be performed as the electrode plates transferred to the electrode picker are alternately seated one by one. At this time, the lower side of the stacking table 600 may remain fixed to the frame 100 .

The

magazine seating parts

211 and 212 are configured so that a magazine loaded with an electrode plate cut from the outside can be seated therein. A plurality of electrode plates may be loaded in the magazine in the thickness direction. The magazine seating portion may include a first magazine seating portion 211 on which the positive plate magazine is seated and a second magazine seating portion 212 on which the negative plate magazine is seated.

The pre-gauging tables 221 and 222 may be configured to temporarily seat the electrode plate picked up from the magazine seating unit and primarily correct the position of the electrode plate. The electrode plate seated on the pregazing table may then be transported to the alignment unit. The pregazing table may also include a first pregazing table 221 provided on the transport path of the positive electrode plate 1200 and a second pregazing table 222 provided on the transport path of the negative electrode plate 1300. there is.

The position adjusting unit is configured to adjust the position of the electrode plate. The position control unit is configured to be able to rotate in two axes and at a predetermined angle, and the x-axis position, y-axis position and theta angle of the upper surface of the table can be adjusted to align the position while the transferred electrode plate is seated on the upper side. . On the other hand, although not shown, a vision camera looking at the upper surface of the position adjusting unit may be provided to check the positional error of the electrode plate. Meanwhile, the positioning unit may include a first positioning unit 231 for adjusting the position of the positive electrode plate 1200 and a second positioning unit 232 for aligning the position of the negative electrode plate 1300.

The sepa feeder 710 may be configured to adjust the tension of the separation membrane 1100 on the transfer path of the separation membrane 1100 . The sepa feeder 710 constantly maintains a rapidly changing tension when the separator 1100 is pushed and pulled out from the upper side of the stacking table 600 by the first electrode picker 510 and the second electrode picker 520. function to make

The tension adjusting unit 720 is configured to adjust tension while pushing the separation membrane 1100 being transported in the thickness direction of the separation membrane 1100 .

The winder 800 is configured to perform an operation of winding an outer surface of the separator 1100 while holding the stacked electrode assembly 1000 (jelly roll) on the stacking table 600 . The winder 800 holds the jelly roll while seated on the upper side of the stacking table 600, separates the jelly roll from the upper surface of the stacking table 600 so that the outside of the jelly roll can be wrapped with the separator 1100, and prevents interference. The outside of the jelly roll can be wrapped with the separator 1100 in an empty space.

On the other hand, since the configuration of the above-described frame 100, vertical plate 300, and separator supply unit can be adopted as the configuration of a generally used high-speed stacking device for electrode plates of a zigzag type secondary battery, further detailed description will be omitted.

Hereinafter, the sepa feeder 710, the tension controller 720, the

electrode pickers

510 and 520, the stacking table 600, and the winder 800 will be described in detail.

Referring to FIG. 3 , in the present invention, the sepa feeder 710 is configured to adjust the tension of the separation membrane 1100 supplied to the stacking table 600 . The sepa feeder 710 may be configured to clamp the separation membrane 1100 and pull the separation membrane 1100 along the movement direction in order to control the movement speed of the separation membrane 1100 . The sepa feeder 710 is configured to minimize a change in tension generated when the electrode assembly 1000 is formed by stacking the separators 1100 in a zigzag pattern as the fixed stacking table 600 is used. In the case of using the fixed stacking table 600, the conveying direction and the stacking direction of the separator 1100 may be substantially perpendicular, and in this case, the conveying speed of the separator 1100 also varies depending on the stacking process once. . The sepa feeder 710 may grab and pull the separation membrane 1100 so that the separation membrane 1100 can be moved faster than the initial transport speed of the separation membrane 1100 .

The sepa feeder 710 may include a first clamp 711 and a second clamp 713 to clamp and pull the separation membrane 1100 along the transport path of the separation membrane 1100 . The first clamp 711 and the second clamp 713 may alternately clamp the separation membrane 1100 and pull it a predetermined distance. The first clamp 711 and the second clamp 713 are configured to reciprocate a predetermined distance.

In this embodiment, the first clamp 711 and the second clamp 713 of the sepa feeder 710 may be configured to reciprocate in a horizontal direction. Either the first clamp 711 or the second clamp 713 is configured to clamp the separation membrane 1100 on the left side and move to the right side a predetermined distance to pull the separation membrane 1100. At this time, the first clamp 711 or the second clamp 713, which does not clamp the separator 1100, moves to the left in a state in which the separator 1100 is not clamped to prepare for the next traction. The first clamp 711 and the second clamp 713 may be configured not to interfere with each other. The first clamp 711 and the second clamp 713 may be formed to extend from both sides in the width direction of the separation membrane 1100 in a direction facing each other with the separation membrane 1100 interposed therebetween.

The first clamp 711 is operated by the first clamp driving unit 712, and the first clamp driving unit 712 moves the first clamp 711 in the left and right directions and performs a clamping operation of the first clamp 711. can be configured to At this time, the first clamp driving unit 712 may be provided with a plurality of elements, and may include a plurality of driving elements such as a linear actuator and a pneumatic actuator.

Similar to the first clamp 711, the second clamp 713 can also be operated by the second clamp driver 714. The second clamp driving unit 714 may be provided similarly to the first clamp driving unit 712 .

On the other hand, the first clamp 711 and the second clamp 714 are provided to be reciprocating in the left and right directions, and in this case, position errors and speed errors generated by the influence of gravity during reciprocating movements can be minimized or eliminated. there will be

In addition, when the first clamp driving unit 712 and the second clamp driving unit 714 are configured as linear motors, when the first clamp 711 and the second clamp 713 are configured to move in a horizontal direction, when power is cut off, sudden It can be prevented from being moved to the lowest position by gravity. In this case, when the first clamp 711 and the second clamp 713 move to an uncontrolled position, collision with each other can also be prevented.

The tension adjusting unit 720 is configured to finely and accurately adjust the tension of the separation membrane 1100 passing through the sepa feeder 710 . The tension adjusting unit 720 may adjust the tension of the separation membrane 1100 by pushing the separation membrane 1100 in the thickness direction of the separation membrane 1100 . Meanwhile, when the initial position is set to a position where the separation membrane 1100 is pushed a predetermined distance, the tension control unit 720 may increase or decrease the tension currently acting on the separation membrane 1100 .

The tension adjusting unit 720 may include a tension adjusting unit roller 721 and a tension adjusting unit driving unit 722 .

The tension control unit roller 721 is provided at the end where the separation membrane 1100 comes in contact so as to adjust the tension without affecting the moving speed of the separation membrane 1100, and is configured to rotate naturally according to the movement of the separation membrane 1100. do.

In FIG. 3 , the tension controller driver 722 may adjust the horizontal position of the tension controller roller 721 to adjust the force that the tension controller roller 721 presses on the separator 1100 . As an example, the tension adjusting unit driving unit 722 is provided as a linear actuator or a pneumatic actuator and is configured to reciprocate a predetermined distance, and a driving amount may be controlled by a control unit.

4 is an enlarged perspective view of the electrode picker shown in FIG. 2;

Referring to FIG. 4 , the electrode picker in the present invention is configured to pick up electrode plates and transfer them to the stacking table 600 . In addition, the separation membrane 1100 is pushed along with the transfer of the electrode plate so that the separation membrane 1100 can be disposed along a zigzag path.

The electrode picker may include a first electrode picker 510 and a second electrode picker. The first electrode picker 510 and the second electrode picker may be symmetrical to each other with respect to the stacking table 600 . Hereinafter, for convenience of explanation, it is assumed that the first electrode picker 510 transports the positive electrode plate 1200 and the second electrode picker transports the negative electrode plate 1300. However, the present invention does not limit the type of electrode plate that each hand picks up, and the supply and transport of the positive and negative plates may be changed according to the user's choice. That is, unlike the following embodiments, the negative electrode plate is first, and the first hand can be deformed to transfer the negative electrode plate and the second hand to transfer the positive electrode plate. In this case, also in FIG. 1, the negative plate is supplied to the first magazine seating part 211, the first pregazing table 221, and the first position adjusting part 231, and the first electrode picker 510 transfers the negative plate can do. At this time, on the contrary, the positive plate is supplied to the second magazine seating part 212, the second pregazing table 222, and the second position adjusting part 232, and the second electrode picker 520 can transfer the positive plate.

The first electrode picker 510 may be configured to pick up the positive electrode plates 1200 one by one from the positive electrode plate 1200 magazine and finally transfer them to the stacking table 600 . The first electrode picker 510 is configured to be movable in two axial directions and is configured to perform pickup and placing operations of the positive electrode plate 1200 .

The first electrode picker 510 and the second electrode picker 520 may be provided on the electrode picker support 501 extending a predetermined distance upward from the base.

The first electrode picker 510 may include a first electrode picker horizontal driver 511 , a first electrode picker frame 512 , an extension 513 , and a pick-up module 514 .

The first electrode picker horizontal driving unit 511 is configured to adjust the horizontal position of the first electrode picker 510 in the electrode picker support unit 510 . The first electrode picker horizontal driving unit 511 is composed of, for example, a linear actuator to precisely adjust the horizontal position.

The first electrode picker frame 512 has one side connected to the first electrode picker horizontal driving unit 511 and may be configured to move horizontally on the electrode picker support 510 . The first electrode picker frame may be formed by extending a predetermined length in the vertical direction.

The extension part 513 extends from one side of the first electrode picker frame to a predetermined length and may be formed in plurality.

In accordance with the movement of the first electrode picker frame 512, the first pick-up module 514 to be described below may be simultaneously horizontally moved. Meanwhile, the first electrode picker frame 512 includes a driving unit and a plurality of first extension units 513, each of which is configured to include a pickup module. One side of the first extension part 513 may be connected to the above-described first electrode picker frame 512, and the other side may extend in a horizontal direction. A pickup module may be provided below each first extension part 513 . In this embodiment, three first extensions 513 are disclosed. Each of the three first extension parts 513 corresponds to the distance between the first magazine seating part 211, the first pregazing table 221, the first position adjusting part 231, and the stacking table 600. The separation distance can be determined. As an example, the three first extension parts 513 may be spaced apart from each other at the same distance.

The first pick-up module 514 is composed of a plurality, and each may be provided below the first extension part 513 . Each of the first pick-up modules 514 may be configured to pick up the positive plate 1200 one by one. Each of the first pick-up modules 514 is provided with a vacuum port to receive a negative pressure and adsorb an electrode plate.

The second electrode picker is configured to transfer the negative electrode plate 1300 in the opposite direction to the transport path of the positive electrode plate 1200 . The second electrode picker is configured similarly to the first electrode picker 510 and may include all components of the first electrode picker 510 .

Meanwhile, the configuration in which the above-described first electrode picker 510 picks up the positive plate 1200 and the second electrode picker 520 picks up the negative plate 1300 is only an example, and the first electrode picker 510 picks up the negative plate ( 1300), and the second electrode picker may be configured to pick up the positive electrode plate 1200. In this case, the positions of the first electrode picker 510 and the second electrode picker may be interchanged. That is, the first electrode picker 510 and the second electrode picker are only named for distinction from each other, and the transfer target may be the positive electrode plate 1200 or the negative electrode plate 1300.

FIG. 5 is an enlarged perspective view centering on the stacking table 600 shown in FIG. 2 .

Referring to FIG. 5, the transfer of the positive electrode plate 1200 is described. They are arranged in a straight line along the path and may be spaced apart from each other at a predetermined interval. As described above, the first electrode picker 510 includes three pickup modules, and is configured to be movable by adsorbing the positive plate 1200 at the same time. The first electrode picker 510 is configured to reciprocate as much as the distance that the positive electrode plate 1200 is transferred from the first position adjusting unit 231 to the stacking table 600 . At this time, three substrates may be simultaneously transferred by the first electrode picker 510 . Specifically, from the first magazine seat 211 to the first pregazing table 221, from the first pregazing table 221 to the first position adjusting unit 231, the first position adjusting unit 231 Three electrode plates can be simultaneously moved from the stacking table 600 to each other.

Meanwhile, the transfer of the negative electrode plate 1300 may be performed similarly to the transfer of the positive electrode plate 1200 . However, the conveying directions may be conveyed in opposite directions to each other. Meanwhile, the first electrode picker 510 and the second electrode picker may supply the positive plate 1200 and the negative plate 1300 to the stacking table 600 while alternately moving toward the stacking table 600 .

FIG. 6 is an exploded perspective view of each module centering on the stacking table 600 shown in FIG. 2 .

The stacking table 600 is provided with a seating surface and may include an electrode gripper 610 capable of temporarily fixing the stacked electrode assembly 1000 by pressing it on the seating surface. The electrode gripper 610 is configured to temporarily fix the separator 1100 on the top surface of the electrode assembly 1000 on the stacking table 600 by pressing the electrode plate seated on the upper side of the separator 1100. Thereafter, in the process of stacking the next electrode plate, the separator 1100 is placed on the uppermost surface and when the electrode plate is seated, the electrode gripper 610 moves to the outside of the seating surface, and when the electrode plate is seated, it is temporarily fixed by pressing the electrode plate on the top surface again. do. The operation of the electrode gripper 610 may be repeatedly performed until the electrode assembly 1000 is completed.

The winder 800 may include a first winder link 810 , a second winder link 820 and a jelly roll gripper 830 . The first winder link 810 and the second winder link 820 are configured to be relatively movable with the stacking table 600, and stack the jelly rolls while the jelly roll gripper 830 grips the jelly rolls. It is moved so as to separate from the upper surface of the table 600. As an example, the first winder link 810 may be configured to be movable from the base 200 in the y-axis direction. The second winder link 820 may be configured to be movable in the x and z axis directions on the first winder link 810 . Meanwhile, each of the first winder link 810 and the second winder link 820 may be configured as a pair and may be simultaneously controlled.

Meanwhile, a winder 800 may be provided on one side of the stacking table 600 . The winder 800 is configured to hold the stacked electrode assembly 1000 (jelly roll) and wind the outside to the separator 1100 to finish the stacking process. The winder 800 may include a jelly roll gripper 830 configured to grip the electrode assembly 1000 and a pair of winder 800 links configured to move the jelly roll gripper 830. can The link of the winder 800 may be configured to move the jelly roll gripper 830 to the upper side of the stacking table 600 or to separate it from the seating surface of the stacking table 600. The jelly roll gripper 830 is composed of a pair and may be rotatably connected to each end of the pair of winder 800 links.

The jelly roll gripper 830 is configured to grip the stacked jelly rolls. The winder 800 links are composed of a pair, and one side of each is connected to the stacking table 600, and the other side may be connected to the jelly roll gripper 830. Thereafter, the jelly roll gripper 830 rotates the jelly roll while relatively rotating with the first winder link 810 . Therefore, the winder 800 can move in three-axis directions while holding the jelly rolls, and since it can rotate, it picks up the jelly rolls from the stacking table 600 and wraps the outside with the separator 1100. You can do it.

Meanwhile, the guide roller 900 is configured to temporarily fix the separator 1100 during the jelly roll finishing process in association with the operation of the winder 800 . The guide roller 900 is configured to move in the width direction of the separator 1100 and enter the upper side of the stacking table 600 . When the guide roller 900 enters the upper surface of the stacking table 600 and temporarily fixes the separator 1100 to one side, the winder 800 grips the jelly roll and wraps the outside with the separator 1100 to finish the operation. Do the work.

Thereafter, one jelly roll manufacturing cycle may be completed while the cutter cuts the separator 1100 .

On the other hand, the finishing step of manufacturing such a jelly roll will be described in detail later with reference to FIGS. 16A to 16D.

7 is a front view of a sepa feeder and a tension control unit.

Referring to FIG. 7 , the sepa feeder 710 is configured to pull the separator horizontally on the vertical frame 100, and the tension adjusting unit 720 may be provided to pressurize the separator in the horizontal direction. . The separation membrane 1100 may be supplied to the stacking table 600 after being pulled by the sepa feeder 710 and finally tension-adjusted by the tension adjusting unit 720 . The tension adjusting unit 720 has a function of secondarily finely adjusting the tension between the sepa feeder 710 and the

electrode pickers

510 and 520 after the tension is adjusted by the sepa feeder 710 .

8 is an operating state diagram of the sepa feeder.

Referring to FIG. 8 , when the first clamp 711 of the sepa feeder 710 grips the separator 1100 and pulls (or pulls it out) in the right direction, the second clamp 713 moves to the left with the vertical gap widened. move At this time, the first clamp 711 moves between the second clamps 713 while holding the separation membrane 1100 . Accordingly, the first clamp 711 and the second clamp 713 can alternately pull the separation membrane 1100 while avoiding interference.

Referring to FIG. 9 , the first electrode picker 510 and the second electrode picker 520 may each have rollers in directions facing each other. A first separator supporting roller 516 may be provided at an end adjacent to the second electrode picker 520 in the first electrode picker 510 . Similarly, the second separator support roller 526 may be provided at an end adjacent to the first electrode picker 510 in the second electrode picker 520 .

When the first

separator support rollers

516 and 526 come into contact with the separator while moving in the horizontal direction, they can be stably pushed without stress to the separator.

Each of the

electrode pickers

510 and 520 is configured to push the separator by the separator support roller while picking up the electrode plate from the position adjusting unit and transferring it to the stacking table 600 . At this time, the direction in which the first electrode picker 510 and the second electrode picker 520 push the separator may be opposite to each other. As an example, a direction in which the first electrode picker 510 pushes the separator may be an x direction in FIG. 9 , and a direction in which the second electrode picker 520 pushes the separator may be a -x direction.

Meanwhile, the pick-up

modules

513, 514, and 516 provided in each of the

electrode pickers

510 and 520 are configured to be lifted and lowered to pick up or place electrode plates.

On the other hand, the

separator support rollers

516 and 526 have been described in an embodiment in which each electrode picker is provided with one, but this is only an example and may be modified and implemented in a configuration in which a plurality of separator support rollers are provided in one electrode picker. .

10 is a front view showing a modified example of a sepa feeder.

Referring to FIG. 10 , the sepa feeder 710 may be configured to adjust tension by pulling the separation membrane 1100 in a vertical direction. In this case, the first clamp 711 and the second clamp 713 of the sepa feeder 710 may alternately grip and pull the separation bag while reciprocating in the vertical direction. Meanwhile, the tension adjusting unit 720 may adjust the tension by pushing the separation membrane 1100 drawn out from the separator feeder 710 in a direction perpendicular to the transport direction of the separation membrane 1100.

11a, 11b, 11c, 11d, 11e, and 11f schematically illustrate a state in which the transfer of the cathode plate 1300 is completed from a state in which the transfer of the positive electrode plate 1200 is started for convenience of description.

Referring to FIG. 11A , a state in which stacking of one negative electrode plate is completed is illustrated.

Referring to FIG. 11B, after the initial state, the first electrode picker 510 picks up the positive electrode plate 1200 seated on the first position adjusting unit 231 and moves it to the right so that it can be transferred to the stacking table 600. move At this time, the second electrode picker 520 moves to the right to pick up a new negative electrode plate 1300 . Meanwhile, as the first electrode picker 510 moves to the right, the separator 1100 is supported by the roller provided in the first electrode picker 510, and the separator 1100 is drawn out, and the top surface of the electrode assembly 1000 The separator 1100 covers the negative electrode plate 1300 disposed on. Meanwhile, although not shown, the uppermost end of the electrode assembly is maintained in a supported state by the electrode gripper 610 .

Referring to FIG. 11C, the pick-up module of the first electrode picker 510 descends a predetermined distance, and as the electrode gripper retracts, the positive electrode plate 1200 picked up by the first electrode picker 510 is removed from the separator 1100. set on the top surface. At this time, the pickup module of the second electrode picker 520 descends a predetermined distance and picks up a new negative electrode plate 1300 .

Referring to FIG. 11D, thereafter, the first pick-up module 514 of the first electrode picker 510 rises a predetermined distance. At this time, the electrode gripper 610 moves forward and presses and supports the upper end of the positive electrode plate 1200 transferred by the first pick-up module 514 . At this time, the second electrode picker 520 is moved to a position adjacent to the first electrode picker 510 while moving to the left in a state where the second pickup module 523 has picked up the new negative electrode plate 1300 .

Referring to FIG. 11E, thereafter, the first electrode picker 510 and the second electrode picker 520 simultaneously move to the left. At this time, the separator 1100 is supported by the second separator support roller 526 provided in the second electrode picker 520 and stacked along a zigzag path opposite to the stacking direction in FIG. 10 .

Referring to FIG. 11F, the second pick-up module 523 of the second electrode picker 520 descends a predetermined distance. At this time, the electrode gripper retracts and at the same time the second electrode picker 520 removes the negative electrode plate 1300 as a separator. It is seated on the upper surface of (1100). At this time, the first pickup module 514 of the first electrode picker 510 descends a predetermined distance and picks up a new positive electrode plate 1200 .

Meanwhile, the electrode assembly 1000 may be manufactured by repeating the operations of FIGS. 10A to 10F.

Meanwhile, when electrode plates of the set number of stacks of the electrode assembly 1000 are piled up and stacking is completed, an operation for discharging the electrode assembly 1000 may be performed. This will be described in detail later with reference to FIGS. 16A to 16D.

Meanwhile, although not shown, when the positive electrode plate 1200 or the negative electrode plate 1300 is seated on the top surface of the separator 1100, the above-described electrode gripper 610 presses the electrode assembly 1000 toward the stacking table 600 to stably stabilize it. be able to support

12a, 12b, 12c and 12d are diagrams illustrating the concept of a separation membrane pulling operation of the sepa feeder. In this drawing, a point P of the separation membrane 1100 is indicated for ease of understanding.

Referring to FIG. 12A , the first clamp 711 clamps the separator 1100, and the second clamp has a predetermined distance so that the first clamp can pass between the second clamps 713 without clamping the separator 1100. can be separated by

Referring to FIG. 12B, after the first clamp clamps the separation membrane 1100 and moves to the right by a predetermined distance, the separation membrane 1100 is pulled by the first clamp and moves. At this time, the 2 clamp is moved to the left for the next towing.

Referring to FIG. 12C , the first clamp finishes pulling the separation membrane 1100, the first clamp releases the clamping operation of the separation membrane 1100, and is spaced apart from each other. At the same time, the second clamp performs a clamping operation to hold the separator 1100 .

Referring to FIG. 12D , like the first clamp in FIG. 11A , the second clamp may move to the right while pulling the separation membrane 1100 and draw out the separation membrane 1100 to a predetermined length.

Meanwhile, the operation of the sepa feeder 710 described with reference to FIGS. 12A to 12D may be controlled in synchronization with the operation of the electrode picker, and may be temporarily stopped after the stacking of the electrode assembly 1000 is completed. Meanwhile, this stopping operation may be equally applied to a sepa feeder equipped with a clamp that reciprocates in the vertical direction shown in FIG. 10 .

Referring to FIG. 13A, in the first half of the movement of the electrode picker, the first length L1 is shortened and the length of the second length L2 is increased. At this time, the change in the second length (L2) is greater than the change in the first length (L1), so the withdrawal speed of the separation membrane is gradually increased.

Then, in the latter half of the movement of the electrode picker, the length of the first length L1 gradually increases, and the length of the second length L2 also gradually increases. Therefore, the withdrawal speed of the separation membrane is further increased.

Referring to FIG. 13B , there is a withdrawal speed of the separator 1100 in the course of two electrode lamination cycles, and the withdrawal speed of the separator 1100 in one electrode lamination cycle gradually increases toward the end. At this time, if the tension is not adjusted, the tension acts on the separator 1100 in proportion to the speed, which affects the quality of the electrode assembly 1000. Therefore, in the above-described sepa feeder, it is possible to maintain a constant tension by actively increasing the withdrawal speed of the separation membrane 1100.

14a, 14b, 14c, 14d and 14e are conceptual diagrams showing the operating speed of the sepa feeder 710 according to the operation of the electrode picker.

Referring to FIGS. 14A to 14E , in the course of a one-time operation of transferring one electrode plate, the positions of the first separator support roller 516 and the second separator support roller 526 and the first separator support roller 516 in the separator feeder 710 The positions of the clamps 711 can be checked respectively.

The withdrawal speed of the separation membrane 1100 tends to increase from the beginning to the end of one stacking process. Specifically, even if the horizontal movement speed of the electrode picker is maintained constant and moves at the same distance (d) during unit time, the separation membrane withdrawal speed is changed. At this time, in the sepa feeder 710, the final speed v2 may be controlled faster than the initial speed v1 so that the separator 1100 can be pulled in response to the withdrawal speed of the separator 1100.

Meanwhile, in FIGS. 14a to 14e, the concept of adjusting the pulling speed of the separator of the first tension adjusting unit when the moving speed of the electrode picker is constant is shown. The tension of the separation membrane can be kept constant by controlling the speed. In this case, the movement speed of the electrode picker may gradually slow down from the beginning to the end according to one electrode plate transfer. In addition, the tension of the separator may be controlled to maintain a constant level by controlling both the pulling speed of the first tension controller and the moving speed of the electrode picker.

Referring to FIGS. 15A and 15B , the tension control unit 720 can precisely adjust the tension of the separation membrane 1100 after controlling the withdrawal speed of the separation membrane 1100 of the separator feeder 710 . At this time, the tension of the separator 1100 can be measured from the tension control unit 720 or a sensor provided separately, and the tension can be precisely adjusted.

Hereinafter, the finishing process of manufacturing the electrode assembly 1000 will be described with reference to FIGS. 16A to 16D.

16a, 16b, 16c and 16d are operating state diagrams of the winder 800.

The winder 800 can wrap the outer surface of the jelly roll with the separator 1100 after the electrode assembly 1000 is completely stacked by the operation of the electrode picker.

Referring to FIG. 16A , the electrode assembly 1000 is on standby in a state in which stacking is completed on the seating surface of the stacking table 600, and at this time, it is supported by the electrode gripper 610 to maintain a fixed position.

Referring to FIG. 16B , as a start of the winding operation, a guide roller (not shown) may be drawn out along a moving path of the separator 1100 to temporarily support the separator 1100 . After that, the position of the pair of jelly roll grippers 830 is adjusted so that their ends come close to each other. That is, the position of the jelly roll gripper 830 in the y-axis direction can be adjusted to a position capable of holding the electrode assembly 1000 .

Afterwards, referring to FIG. 16C , the electrode gripper 610 retreats to release the support of the jelly roll, and the jelly roll gripper 800 grips the electrode assembly 1000 and moves it in the x direction. At this time, the separation membrane 1100 may be pulled out while being pulled as the position of the jelly roll is changed. At this time, the winder 800 may adjust the position of the jelly roll gripper 830 to a position where interference with other components does not occur when the electrode assembly rotates. For example, it may be moved in the x direction by a length longer than the width of the seating surface of the stacking table 600 in the x direction.

Referring to FIG. 16D , the jelly roll gripper 830 rotates the electrode assembly 1000 while holding it. When the jelly roll gripper 830 rotates the electrode assembly, the outer surface of the jelly roll is surrounded by the separator 1100. At this time, the number of times the separator 1100 surrounds the outer surface of the electrode assembly may be set to a plurality.

Afterwards, although not shown, the one-time stacking process of the electrode assembly 1000 may be completed as the separator 1100 is cut by a blade. At this time, since the separator 1100 is cut by the blade while the electrode support of the stacking table 600 supports and fixes the separator 1100, preparations for stacking the next electrode assembly 1000 are completed. .

As described above, the apparatus for high-speed stacking of electrode plates of a zigzag type secondary battery according to the present invention can stack while fixing the stacking table, thereby fundamentally preventing problems caused by inertia occurring during movement of the stacking table. In addition, unlike the conventional dancer type that only adjusts the tension of the separator provided continuously, motion control and tension of the separator can be controlled by the sepa feeder, so it can be actively adjusted in response to the operation of the electrode picker, resulting in high precision. has the effect of improving

In addition, unlike the conventional reciprocating Z-stacking stacking device, the high-speed stacking device for zigzag type secondary batteries according to the present invention operates simultaneously with a pair of left and right electrode pickers and skips the movement/rotation of the stacker, thereby dramatically increasing the production speed of secondary batteries. There is an effect that can be improved.

The present invention can be applied to a secondary battery manufacturing apparatus and thus has industrial applicability.

Claims

A first magazine receiving portion configured to load a plurality of positive electrode plates;

a second magazine mounting portion configured to load a plurality of negative electrode plates;

a stacking table provided between the first magazine seating portion and the second magazine seating portion;

a separator supply unit configured to supply the wound separator to the stacking table while unwinding;

a first electrode picker configured to pick up the positive electrode plate and place it on the stacking table;

a second electrode picker configured to pick up the negative electrode plate and place it on the stacking table;

The first electrode picker is seated on the top surface of the stacking table while pushing the separator during the process of transferring the positive electrode plate in the first direction,

The second electrode picker is a zigzag type secondary battery configured to be seated on the top surface of the electrode assembly stacked on the stacking table while pushing the separator while transferring the negative electrode plate in a second direction opposite to the first direction. Electrode plate high-speed lamination equipment.
According to claim 1,

It is provided in the transfer path of the separation membrane,

High-speed stacking device for electrode plates of a zigzag type secondary battery comprising a sepa feeder configured to adjust the tension of the separator in response to the first electrode picker or the second electrode picker pushing the separator.
According to claim 2,

The sepa feeder,

High-speed stacking device for electrode plates of a zigzag type secondary battery configured to be pulled in the transport direction of the separator as the first electrode picker moves in the first direction or the second electrode picker moves in the second direction.
According to claim 3,

The sepa feeder,

A high-speed stacking device for electrode plates of a zigzag type secondary battery further comprising a first clamp and a second clamp configured to selectively clamp the separator.
According to claim 4,

The first clamp and the second clamp are configured to independently reciprocate along the pulling direction of the separator.
According to claim 5,

The first clamp and the second clamp are configured to clamp and pull the separator alternately with each other.
According to claim 6,

The first clamp and the second clamp are configured to pull the separator in the vertical direction. High-speed stacking device for electrode plates of a zigzag type secondary battery.
According to claim 6,

The first clamp and the second clamp are configured to pull the separator in the left and right directions, and the electrode plate high-speed stacking device of the zigzag type secondary battery.
According to claim 6,

The first clamp and the second clamp are high-speed stacking devices for electrode plates of zigzag type secondary batteries in which the final traction speed is controlled faster than the initial traction speed within one traction operation.
According to claim 9,

A second tension adjusting unit provided at a point after passing through the sepa feeder in the transfer path of the separation membrane and configured to adjust the tension of the separation membrane by adjusting the movement distance in a direction perpendicular to the transfer path of the separation membrane A high-speed stacking device for electrode plates of a zigzag type secondary battery.
According to claim 3,

The stacking table is provided with a fixed lower side,

The high-speed stacking device for electrode plates of a zigzag type secondary battery in which the first electrode picker and the second electrode picker seat the positive electrode plate or the negative electrode plate in a placing area provided above the stacking table.
According to claim 11,

The high-speed stacking device for electrode plates of a zigzag type secondary battery, wherein each of the first electrode picker and the second electrode picker includes a roller provided at a point in contact with the separator.
According to claim 12,

The rollers of the first electrode picker and the rollers of the second electrode picker are configured to push the separator in opposite directions to each other.
According to claim 13,

a first alignment unit provided between the first magazine seating unit and the stacking table; and

The high-speed stacking device for electrode plates of a zigzag type secondary battery further comprising a second alignment unit provided between the second magazine seating unit and the stacking table.
According to claim 14,

The first electrode picker includes a pair of pickup modules,

One of the pair of pickup modules transfers the positive electrode plate from the first magazine mounting unit to the first alignment unit;

The other one of the pair of pickup modules transfers the positive electrode plate from the first alignment unit to the stacking table;

A pair of positive electrode plates transported from the pair of pick-up modules are transported at the same time.
According to claim 15,

The first electrode picker is configured to be movable in a vertical direction by a predetermined distance,

A high-speed stacking device for electrode plates of a zigzag type secondary battery configured to simultaneously perform pickup or placing of the positive electrode plate in the pair of pickup modules.
According to claim 3,

It is configured to hold the stacked jelly rolls on the stacking table,

The high-speed stacking device for electrode plates of a zigzag type secondary battery further comprising a winder configured to be rotatable while holding the jelly roll so as to wrap the outside of the jelly roll with the separator.
According to claim 17,

The winder,

a pair of winder links configured to grip and move the jelly roll from the placing area of the stacking table;

The high-speed stacking device for electrode plates of a zigzag type secondary battery further comprising a jelly roll gripper, both sides of which are rotatably connected to the ends of the pair of winder links and configured to be rotatable while holding the jelly roll.
According to claim 18,

The device further includes a guide roller configured to temporarily support the separator when the winder grips the jelly roll and releases it from the placing area of the stacking table.
According to claim 19,

The guide roller,

High-speed stacking device for electrode plates of a zigzag type secondary battery configured to move in the width direction of the separator and be positioned above the stacking table.