KR20230127806A - Manufacturing systmem and manufacturing method of electrode assembly - Google Patents

Abstract

An electrode assembly manufacturing system according to an embodiment of the present invention includes a transport unit for transporting a laminate in which a plurality of unit cells are stacked on a separator sheet at regular intervals; A meander detection sensor for detecting meandering of the laminate; If the meander of the laminate is within a predetermined range, the meander correction unit for correcting the meander of the laminate based on the detection result of the meander detection sensor; and a gripper that grips the laminate and rearranges it to a normal position when the meandering of the laminate is out of a predetermined range.

Description

Electrode assembly manufacturing system and manufacturing method {MANUFACTURING SYSTMEM AND MANUFACTURING METHOD OF ELECTRODE ASSEMBLY}

The present invention relates to a manufacturing system and manufacturing method of an electrode assembly.

Secondary batteries, unlike primary batteries, can be recharged, and have recently been extensively researched and developed due to their small size and high capacity. As technology development and demand for mobile devices increase, demand for secondary batteries as an energy source is rapidly increasing.

Secondary batteries are classified into coin-type batteries, cylindrical batteries, prismatic batteries, and pouch-type batteries according to the shape of a battery case. In a secondary battery, an electrode assembly installed inside a battery case is a power generating device capable of charging and discharging, consisting of a laminated structure of electrodes and separators.

The electrode assembly is a jelly roll type in which a separator is interposed between a sheet-type positive electrode and a negative electrode coated with an active material, a stack type in which a plurality of positive and negative electrodes are sequentially stacked with a separator interposed therebetween, and a stack type. The unit cells can be roughly classified into a stack-and-folding type in which a long separator sheet is wound.

In particular, the manufacturing process of the stack folding type electrode assembly includes a bonding process of bonding a plurality of unit cells to a separator sheet at predetermined intervals and a folding process of stacking the plurality of unit cells by folding the separator sheet, The folding process generally includes a meandering correction process for correcting meandering of the separator sheet by Edge Position Control (EPC).

However, in the conventional meandering correction process, when severe meandering of the separator sheet occurs, correction is difficult. As a result, a plurality of unit cells are not stably stacked, and a ball-up phenomenon occurs, and the manufacturing process is temporarily stopped due to operator actions, so there is a concern that the yield of the electrode assembly may decrease.

One problem to be solved by the present invention is to provide an electrode assembly manufacturing system and manufacturing method capable of reliably correcting meandering of a separator sheet.

An electrode assembly manufacturing system according to an embodiment of the present invention includes a transport unit for transporting a laminate in which a plurality of unit cells are stacked on a separator sheet at regular intervals; A meander detection sensor for detecting meandering of the laminate; If the meander of the laminate is within a predetermined range, the meander correction unit for correcting the meander of the laminate based on the detection result of the meander detection sensor; and a gripper that grips the laminate and rearranges it to a normal position when the meandering of the laminate is out of a predetermined range.

The electrode assembly manufacturing system may further include a folding gripper that grips and folds the stack supplied from the transfer unit so that the plurality of unit cells are stacked on each other. The folding gripper may be located behind the gripper with respect to the transport direction of the stacked body.

The gripper may be located behind the meandering correction unit with respect to the transport direction of the laminated body.

The gripper may be configured to move in the width direction of the laminate.

The transfer unit may be configured to stop operating when the meandering of the stack is out of a predetermined range.

The skew correction unit may be configured to move the transfer unit in a width direction of the laminate.

A suction hole for adsorbing the separator sheet may be provided in the transfer unit or the meandering correction unit, and suction of the suction hole may be stopped when the meandering of the laminate is out of a predetermined range.

The electrode assembly manufacturing system may further include an output unit outputting a warning alarm when the meandering of the laminate is out of a predetermined range.

An electrode assembly manufacturing method according to an embodiment of the present invention includes the steps of transferring, by a transfer unit, a stack in which a plurality of unit cells are stacked on a separator sheet at regular intervals; A meandering detection sensor detecting meandering of the laminate being transported; correcting, by a meandering correction unit, the meandering of the laminated body based on a detection result of the meandering detection sensor, when the meandering of the laminate is within a predetermined range; and when the meandering of the laminated body is out of a predetermined range, repositioning the laminated body to a normal position by a gripper.

When the meandering of the laminate is out of a predetermined range, the transfer of the laminate may be stopped.

The transfer unit may include a suction hole for adsorbing the separator sheet, and when the meandering of the stack is out of a predetermined range, suction of the suction hole may be stopped.

When the meandering of the laminate is out of a predetermined range, the output unit may output a warning alarm.

According to a preferred embodiment of the present invention, even when the meandering of the separation membrane sheet is severely generated and the meandering correction unit is out of the correctable range, the gripper can automatically correct the meandering. As a result, the yield of electrode assemblies can be maintained high, and defects in manufactured electrode assemblies can be prevented since no separate worker action is required.

In addition to this, effects that can be easily predicted by those skilled in the art from configurations according to preferred embodiments of the present invention may be included.

The following drawings attached to this specification illustrate preferred embodiments of the present invention, and together with the detailed description of the present invention serve to further understand the technical idea of the present invention, the present invention is the details described in such drawings should not be construed as limited to
1 is a schematic plan view of an electrode assembly manufacturing system according to an embodiment of the present invention.
FIG. 2 is a side view illustrating a process of stacking a plurality of unit cells by folding the stack shown in FIG. 1 .
3A to 3C are plan views for explaining meandering of the laminate shown in FIG. 1 .
4 is a control block diagram of an electrode assembly manufacturing system according to an embodiment of the present invention.
5 is a flowchart of a method for manufacturing an electrode assembly according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail so that those skilled in the art can easily practice with reference to the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited or limited by the following examples.

In order to clearly describe the present invention, parts irrelevant to the description or detailed descriptions of related known technologies that may unnecessarily obscure the subject matter of the present invention have been omitted, and in this specification, reference numerals are added to the components of each drawing. In the specification, the same or similar reference numerals are used for the same or similar components throughout the specification.

In addition, the terms or words used in this specification and claims should not be construed as being limited to ordinary or dictionary meanings, and the inventor appropriately defines the concept of terms in order to best describe his/her invention. It should be interpreted as meaning and concept consistent with the technical idea of the present invention based on the principle that it can be done.

1 is a schematic plan view of an electrode assembly manufacturing system according to an embodiment of the present invention, FIG. 2 is a side view illustrating a process in which a plurality of unit cells are stacked by folding the stack shown in FIG. 1, and FIG. 3A 3C to 3C are plan views for explaining meandering of the laminate shown in FIG. 1 .

An electrode assembly manufacturing system (hereinafter referred to as 'manufacturing system') according to an embodiment of the present invention includes a transfer unit 10, a meander detection sensor 20, a meander correction unit 30, and a gripper 40. can include The manufacturing system may further include a folding gripper 50 .

The transfer unit 10 may transfer the stack 1 in which a plurality of unit cells 2 are stacked on the separator sheet 3 at regular intervals. The plurality of unit cells 2 may be spaced apart at regular intervals along the longitudinal direction of the separator sheet 3 .

Each unit cell 2 may be bonded to one surface (eg, upper surface) of the separator sheet 3 . Each unit cell 2 may be bonded to one surface of the separator sheet 3 while passing through a rolling unit (not shown). For example, the rolling unit may include a heater and a roller, and since this is a well-known technology, a detailed description thereof will be omitted.

Each unit cell 2 may be formed by alternately stacking electrodes and separators. The electrode may be an anode or a cathode, and the separator may separate the anode and the cathode to electrically insulate them. Accordingly, each unit cell 2 may include at least one anode, at least one cathode, and at least one separator.

In addition, each unit cell 2 may be composed of a bi-cell in which the same type of electrode forms the outermost both sides or a full-cell in which different types of electrodes form the outermost both sides. there is.

For example, some of the plurality of unit cells 2 may be A-type unit cells in which an anode, a separator, a cathode, a separator, and an anode are sequentially stacked, and some may have a cathode, a separator, an anode, a separator, and a cathode sequentially. It may be a stacked C-type unit cell. However, the configuration of the plurality of unit cells 2 is not limited thereto.

The transfer unit 10 may be located below the laminate 1, more specifically, the separator sheet 3. For example, transport unit 10 may include a conveyor.

A suction hole H for adsorbing the separator sheet 3 may be provided in the transfer unit 10 . The suction hole H may adsorb the separator sheet 3 . Therefore, the separator sheet 3 can be transported in a state of close contact with the transport unit 10 .

The meandering detection sensor 20 may detect meandering of the laminate 1 . In more detail, the meandering detection sensor 20 may detect meandering in which the laminate 1, particularly the separator sheet 3, deviate from a predetermined movement path and moves obliquely.

The meander detection sensor 20 detects the angle or the width direction distance between the edge of the laminate 1, in particular the separator sheet 3, in the width direction and the preset virtual first line L1, and the like It can detect if it is meandering.

For example, the meandering detection sensor 20 may be an EPC sensor (Edge Position Control Sensor). However, it is not limited thereto, and the meander detection sensor 20 may include various configurations such as a vision camera.

The meander correction unit 30 may correct the meander of the laminate 1 based on the detection result of the meander detection sensor 20 . In more detail, the meandering correction unit 30 may correct meandering of the stacked body 1 by moving the stacked body 1 in the width direction. More specifically, the skew correction unit 30 is connected to the transfer unit 10 and can correct the skew of the stack 1 by moving the transfer unit 10 in the width direction of the stack 1 . That is, a person skilled in the art can appropriately select a configuration (for example, a lead screw or a linear motion guide) for the meandering correction unit 30 to move the transport unit 10 in the width direction of the laminate 1. there is.

As described above, since the separator sheet 3 of the laminate 1 is adsorbed to the suction hole H of the transfer unit 10, the meandering of the laminate 1 can be corrected by the movement of the transfer unit 10. can

However, it is not limited thereto, and it is also possible to correct the meandering of the laminate 1 by moving the meandering correction unit 30 in the width direction of the separation membrane sheet 3 in a state in which the bottom surface of the separation membrane sheet 3 is adsorbed. will be. In this case, the skew correction unit 30 may be provided separately from the transfer unit 10 , and a suction hole for adsorbing the separator sheet 3 may be provided in the skew correction unit 30 .

The meander correction unit 30 may correct the meander of the laminate 1 based on the detection result of the meander detection sensor 10 when the meander of the laminate 1 is within a predetermined range. When the meandering of the laminate 1 is out of a preset range, the gripper 40 may grip the laminate 1 and rearrange it to a normal position.

Since the gripper 40 moves while directly gripping the laminate 1, more specifically the separator sheet 3, the meander of the laminate 1 even if the meander of the laminate 1 is out of a predetermined range. can be effectively corrected.

The gripper 40 may be located behind the skew correction unit 30 with respect to the transport direction of the laminate 1 . When meandering of the laminate 1 occurs, the distortion of the laminate 1 becomes more severe toward the rear with respect to the transport direction, and the gripper 40 can more directly correct this distortion.

A pair of grippers 40 located on both sides of the laminate 1 in the width direction may be provided. The pair of grippers 40 may grip the laminate 1, more specifically, the separator sheet 3 from both sides. The pair of grippers 40 may operate in synchronization with each other.

Each gripper 40 may be configured to move in the width direction of the laminate 1 . In more detail, each gripper 40 may be provided with a moving mechanism 41 that moves the gripper 40 in parallel with the width direction of the laminate 1 . A configuration (for example, a lead screw or a linear motion guide) of the moving mechanism 41 may be designed in various ways as needed.

The pair of grippers 40 may approach the laminate 1 by moving closer to each other, and may grip the laminate 1, more specifically, the separator sheet 3.

The pair of grippers 40 may correct meandering of the laminate 1 by moving in the same direction while holding the laminate 1, more specifically, the separator sheet 3.

The pair of grippers 40 may move away from each other after releasing the laminate 1, more specifically, the separator sheet 3, to be separated from the laminate 1.

The gripper 40 may grip the laminate 1 in a state in which the operation of the transfer unit 10 is stopped. That is, when the meandering of the laminate 1 is out of a predetermined range, the transfer unit 10 stops operating, and the gripper 40 grips the laminate 1 and rearranges it to a normal position. When the operation of the transfer unit 10 is stopped, the transfer of the stack 1 may be stopped, so that the meandering correction of the stack 1 by the gripper 40 can be stably performed.

The gripper 40 may hold the stacked body 1 in a state in which the suction of the suction hole H is stopped. That is, when the meandering of the stacked body 1 is out of a predetermined range, the suction of the suction hole H is stopped, and the gripper 40 may grip the stacked body 1 and rearrange it to a normal position. When the suction of the suction hole H is stopped, the adsorption of the laminate 1 may be stopped, so that the meandering correction of the laminate 1 by the gripper 40 can be smoothly performed.

Meanwhile, the folding gripper 50 may hold and fold the stacked body 1 supplied from the transfer unit 10 so that the plurality of unit cells 2 are stacked on each other. The folding gripper 50 may be named as a mandrel gripper.

The folding gripper 50 may be located at the rear of the gripper 40 with respect to the transport direction of the laminate 1 .

A pair of folding grippers 50 located on both sides of the laminate 1 in the width direction may be provided. A pair of folding grippers 50 may operate in synchronization with each other.

Each folding gripper 50 may be configured to move in the width direction of the laminate 1 and rotate about a rotation axis parallel to the width direction of the laminate 1 . In more detail, each folding gripper 50 includes a moving mechanism 51 for moving the folding gripper 50 in parallel with the width direction of the laminate 1, and a folding gripper 50 of the laminate 1. A rotation mechanism 52 for rotating about a rotation axis parallel to the width direction may be provided. A configuration of the moving mechanism 51 (eg, a lead screw or a linear motion guide) and a configuration of the rotation mechanism 52 (eg, a motor) may be designed in various ways as needed.

The folding gripper 50 can rotate while holding the unit cell 2 and the separator sheet 3 together. Thus, the separator sheet 3 can be folded, the plurality of unit cells 2 are stacked with each other, and the separator sheet 3 can be interposed between the stacked plurality of unit cells 2 .

Hereinafter, the operation of the folding gripper 50 will be described with reference to FIG. 2 . For convenience of explanation, a case in which five unit cells 2 are stacked to form an electrode assembly 4 will be described as an example, and the five unit cells 2 are sequentially arranged in the moving direction of the stack 1. The first unit cell 2a, the second unit cell 2b, the third unit cell 2c, the fourth unit cell 2d, and the fifth unit cell 2e are named.

In the state of FIG. 2 (a), when the folding gripper 50 rotates while gripping the first unit cell 2a and the separator sheet 3, as shown in FIG. 2 (b), the separator sheet (3) is folded and the second unit cell 2b can move to the lower side of the first unit cell 2a. In this state, when the folding gripper 50 further rotates in the same direction, the separator sheet 3 is folded as shown in FIG. can move to the lower side of By repeating this process, an electrode assembly 4 in which a plurality of unit cells 2 are stacked with a separator sheet 3 interposed therebetween can be formed, as shown in (d) of FIG. 2 .

When the electrode assembly 4 is formed, a cutter (not shown) included in the manufacturing system may cut the separator sheet 3 to separate the electrode assembly 4 . And, the folding gripper 50 can continuously manufacture the electrode assembly 4 by repeating the process described above.

On the other hand, the meander detection sensor 20 detects whether the laminate 1 meanders based on the first line L1 corresponding to at least one edge of the laminate 1, more specifically, the separator sheet 3. can detect The first line L1 may be a virtual line, and may coincide with or be adjacent to at least one edge of the separator sheet 3 when the laminate 1 is in a normal position, as shown in FIG. 3A. The meander detection sensor 20 may determine that the laminate 1 is meandering when the laminate 1 deviates from the first line L1, as shown in FIG. 3B.

The meandering sensor 20 may detect whether or not the meandering of the laminate 1 is out of a predetermined range based on the second line L2 located outside the first line L1. The second line L2 may be a virtual line and may be parallel to the first line L1. The meander detection sensor 20 may determine that the meandering of the laminate 1 is out of a predetermined range when the laminate 1 deviates from the second line L2, as shown in FIG. 3C.

However, it is not limited thereto, and the meander detection sensor 20 can also detect whether and how much the laminate 1 meanders based on the angle between the edge of the laminate 1 and the first line L1. do. For example, the meander detection sensor 20 may determine that the laminate 1 is meandering when the angle formed by the edge of the laminate 1 and the first line L1 is greater than or equal to a first set angle, and the laminated body 1 is meandering. If the angle formed by the edge of the body 1 and the first line L1 is equal to or greater than the second set angle greater than the first set angle, it may be determined that the meandering of the laminate 1 is out of a preset range.

As described above, if the meandering of the laminate 1 is within a predetermined range, the meander correction unit 20 may correct the meandering of the laminate 1 based on the detection result of the meander detection sensor 20 . If the meandering of the laminate 1 is out of a predetermined range, the gripper 30 may grip the laminate 1 and rearrange it to a normal position.

4 is a control block diagram of an electrode assembly manufacturing system according to an embodiment of the present invention.

The manufacturing system according to an embodiment of the present invention may further include a controller 60 . The controller 60 may control the overall operation of the manufacturing system.

The controller 60 may control the movement of the laminate 1 by the transfer unit 10 and the rotation of the folding gripper 50 . The controller 60 calculates the required movement distance of the laminate 1 according to the amount of rotation of the folding gripper 50, and synchronizes and controls the rotation of the folding gripper 50 and the operation of the transfer unit 10. .

The controller 60 adjusts the speed at which the transfer unit 10 transfers the stack 1 according to the rotation of the folding gripper 50, so that the amount of the stack 1 supplied to the folding gripper 50 is controlled. can be adjusted. Therefore, even when the folding gripper 50 rotates at high speed, damage to the laminate 1 can be reduced by controlling the transfer unit 10 according to the rotation amount of the folding gripper 50 .

The controller 60 may communicate with the meander detection sensor 20 to determine whether or not the laminate 1 meanders and the degree of meandering.

The controller 60 may control the meandering correction unit 20 based on the detection result of the meandering detection sensor 20 when the meandering of the laminate 1 is within a preset range. At this time, the operations of the transfer unit 10 and the folding gripper 50 may be maintained. Thus, since slight meandering of the laminate 1 can be corrected in real time, the production yield of the electrode assembly can be maintained high.

When the meandering of the laminated body 1 is out of a preset range, the controller 60 stops the operation of the transfer unit 10 and the folding gripper 50 and rearranges the stacked body 1 to a normal position. ) can be controlled.

A manufacturing system according to an embodiment of the present invention may further include an output unit 70 . The output unit 70 may output information related to the operation of the manufacturing system. For example, the output unit 70 may include at least one of a display or a speaker.

The controller 60 may output a warning alarm to the output unit 70 when the meandering of the laminate 1 is out of a preset range. That is, when the meandering of the laminate 1 is out of a predetermined range, the output unit 70 may output a warning alarm.

5 is a flowchart of a method for manufacturing an electrode assembly according to another embodiment of the present invention.

Hereinafter, a method of manufacturing an electrode assembly will be described as another embodiment of the present invention, and this method of manufacturing an electrode assembly (hereinafter referred to as 'manufacturing method') may be performed by the manufacturing system described above. Therefore, contents overlapping with those described above will be omitted, and description will focus on the differences.

The manufacturing method includes the step (S10) of the transfer unit 10 transporting the laminate 1 in which the plurality of unit cells 2 are stacked on the separator sheet 3 at regular intervals (S10), and the meandering sensor 20 Step (S20) of detecting meandering of the stack 1 being transported, and if the meandering of the stack 1 is within a preset range, the meandering correction unit 30 is based on the detection result of the meandering sensor 20 Correcting the meandering of the laminate 1 by doing (S30), and if the meandering of the laminate 1 is out of a predetermined range, the gripper 40 grips the laminate 1 and rearranges it to a normal position (S40) may be included.

The step (S20) of detecting the meandering of the laminate 1 being transported by the meander detection sensor 20 is the process of determining whether the laminate 1 is meandering (S21), and the meandering of the laminate 1 A process of determining whether the set range is out of range (S22) may be included.

In the step of detecting the meandering of the laminate 1 (S20), if the meandering of the laminate 1 is not detected, the folding gripper 50 folds the laminate 1 so that the plurality of unit cells 2 are stacked. Thus, the electrode assembly 4 can be continuously manufactured (S21) (S50).

In the step of detecting the meandering of the laminate 1 (S20), if the meandering of the laminate 1 is detected but the meandering of the laminate 1 is within a set range (preset range), the meander correction unit 30 Based on the detection result of the meander detection sensor 20, meandering of the laminate 1 may be corrected (S21, S22, and S30). And, the operation of the transfer unit 10 and the folding gripper 50 can be maintained. Therefore, the electrode assembly 4 can be continuously manufactured by folding the stack 1 so that the folding gripper 50 stacks the plurality of unit cells 2 (S50).

In the step of detecting the meandering of the laminate 1 (S20), if the meandering of the laminate 1 is detected and the meandering of the laminate 1 is outside the set range (preset range), the gripper 40 The stacked body 1 may be gripped and rearranged to a normal position (S40).

In more detail, when the meandering of the stacked body 1 is out of a predetermined range, the transfer unit 10 stops operating, and thus the transfer of the stacked body 1 may be stopped (S41). At this time, the operation of the folding gripper 50 may also be stopped, and the suction of the suction hole H may also be stopped. Also, the output unit 70 may output a warning alarm.

In a state in which the transfer of the laminate 1 is stopped, the gripper 40 may grip the laminate 1 and rearrange it to a normal position (S42).

When the rearrangement of the laminate 1 by the gripper 40 is completed, the operation of the transfer unit 10 may be resumed (S43). At this time, the operation of the folding gripper 50 may also be resumed, and the suction of the suction hole H may also be resumed.

Thereafter, the electrode assembly 4 may be continuously manufactured by folding the stack 1 so that the folding gripper 50 stacks the plurality of unit cells 2 (S50).

The above description is merely an example of the technical idea of the present invention, and various modifications and variations can be made to those skilled in the art without departing from the essential characteristics of the present invention.

Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by these embodiments.

The protection scope of the present invention should be construed according to the claims below, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

1: laminate 2: unit cell
3: separator sheet 4: electrode assembly
10: transfer unit 20: meander detection sensor
30: meander correction unit 40: gripper
50: folding gripper 60: controller
70: output unit

Claims (12)

A transport unit for transporting a laminate in which a plurality of unit cells are stacked on a separator sheet at regular intervals;
A meander detection sensor for detecting meandering of the laminate;
If the meander of the laminate is within a predetermined range, the meander correction unit for correcting the meander of the laminate based on the detection result of the meander detection sensor; and
The electrode assembly manufacturing system comprising a gripper that grips the laminate and rearranges it to a normal position when the meandering of the laminate is out of a predetermined range. According to claim 1,
Further comprising a folding gripper for gripping and folding the laminate supplied from the transfer unit so that the plurality of unit cells are stacked on each other,
The electrode assembly manufacturing system of claim 1, wherein the folding gripper is located at the rear of the gripper with respect to the transport direction of the stack. According to claim 1,
The electrode assembly manufacturing system of claim 1, wherein the gripper is located behind the skew correction unit with respect to the transport direction of the stack. According to claim 1,
The gripper is configured to move in the width direction of the stacked body, the electrode assembly manufacturing system. According to claim 1,
The electrode assembly manufacturing system configured to stop the operation of the transfer unit when the meandering of the stack is out of a predetermined range. According to claim 1,
The electrode assembly manufacturing system of claim 1 , wherein the skew correction unit is configured to move the transfer unit in the width direction of the laminate. According to claim 1,
The transfer unit or the skew correction unit is provided with a suction hole for adsorbing the separator sheet,
The electrode assembly manufacturing system in which the suction of the suction hole is stopped when the meandering of the laminate is out of a predetermined range. According to claim 1,
The electrode assembly manufacturing system further comprising an output unit outputting a warning alarm when the meandering of the laminate is out of a predetermined range. Transferring, by a transfer unit, a laminate in which a plurality of unit cells are stacked on a separator sheet at regular intervals;
A meandering detection sensor detecting meandering of the laminate being transported;
correcting, by a meandering correction unit, the meandering of the laminated body based on a detection result of the meandering detection sensor, when the meandering of the laminate is within a predetermined range; and
and when the meandering of the stack is out of a predetermined range, the gripper grips the stack and rearranges it to a normal position. According to claim 9,
An electrode assembly manufacturing method in which the transfer of the laminate is stopped when the meandering of the laminate is out of a predetermined range. According to claim 9,
The transfer unit or the skew correction unit is provided with a suction hole for adsorbing the separator sheet,
The electrode assembly manufacturing method in which the suction of the suction hole is stopped when the meandering of the laminate is out of a predetermined range. According to claim 9,
An electrode assembly manufacturing method in which an output unit outputs a warning alarm when the meandering of the laminate is out of a predetermined range.

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