JP5383471B2 - Electrode manufacturing system - Google Patents

Description

  The present invention relates to an electrode manufacturing system for manufacturing an electrode.

  An electrode used for a battery such as a lithium ion secondary battery is manufactured by applying an active material mixture to a metal foil such as aluminum in a predetermined coating amount. The unevenness of the film thickness of the active material mixture applied to the metal foil greatly affects the capacity of the lithium ion secondary battery.

  Then, the technique which measures the film thickness of an active material mixture and controls the said coating amount is proposed (refer patent document 1). In the technique described in Patent Document 1, an active material mixture is applied to a metal foil, and after drying in a drying furnace, the film thickness of the active material mixture is measured, and according to information on the measured film thickness Thus, the film thickness is controlled to be a predetermined film thickness by changing the predetermined coating amount. Further, by performing marking when there is a deviation from a predetermined film thickness, the defective portion can be easily removed.

JP 2007-066821 A

However, in the technique described in Patent Document 1, the applied active material mixture is dried and then its thickness is measured. Therefore, after the organic solvent contained in the active material mixture is removed by drying, the thickness decreases, so that high accuracy is required to measure the unevenness error.
In addition, in the technique described in Patent Document 1, a wide area of several m ² must be excluded as a defect even if the size of the marked defect portion is several cm ^2. Is bad.

  An object of this invention is to provide the electrode manufacturing system which can solve the said subject.

In order to solve the above problems , according to the first embodiment of the present invention , in the electrode manufacturing system , an application unit that applies an active material mixture to form a coating region and a non-coating region on a metal foil; comprising a drying section for drying the coated metal foil by a coating unit, and a punch section for punching a plurality of electrodes from drying metal foil in the drying unit, coating unit, a coating unit for coating, film coating region a film thickness measuring means for measuring the thickness, the metal foil location of the end of the coating area where the film thickness measured is outside the predetermined range with subjecting the starting point mark on the metal foil of the position of the start point of the application region made of a predetermined range Marking means for attaching an end point mark, and the punching unit is a mark detection means for detecting the start point mark and the end point mark, respectively, and at least a plurality of electrodes by punching a metal foil other than between the start point mark and the end point mark Electrode punching to form And the step, to organic and discarding means for discarding the metal foil between at least a start point mark to the end point mark.

  According to the present invention, by measuring the film thickness before drying the active material mixture, even if it is a comparatively inexpensive and not very high accuracy measuring device, the unevenness can be easily measured. In addition, according to the present invention, a defective region having an uneven thickness of the active material mixture can be automatically and accurately discarded using the start point mark and the end point mark, so that the electrode production efficiency is prevented from being lowered. be able to.

It is a figure which shows an example of the manufacturing part of the electrode manufacturing system 100 which concerns on this embodiment. It is a top view which shows the structure of the coating device 110 which concerns on this embodiment. It is a side view which shows the structure of the coating device 110 which concerns on this embodiment. It is a figure which shows an example of the process by the coating device 110 of the electrode manufacturing system 100. FIG. It is a top view which shows the structure of the punching apparatus 160 which concerns on this embodiment. It is a figure which shows an example of the process by the punching apparatus 160 of the electrode manufacturing system 100. FIG.

  Hereinafter, the present invention will be described through embodiments of the invention, but the following embodiments do not limit the invention according to the claims.

FIG. 1 is a diagram illustrating an example of a manufacturing unit of an electrode manufacturing system 100 according to the present embodiment.
In the following description, an outline of the electrode manufacturing system 100 will be described with reference to FIG.
The electrode manufacturing system 100 is a system for manufacturing an electrode used for a lithium ion secondary battery. In the present embodiment, the above-described lithium ion secondary battery will be described as the battery, but the present invention is not particularly limited thereto. For example, the present invention can be applied to various batteries such as a primary battery and a secondary battery other than a lithium ion secondary battery. The electrode manufacturing system 100 is configured by sequentially arranging a coating device 110, a drying device 120, a slit device 130, a compression device 140, a vacuum drying device 150, and a punching device 160.

The coating device 110 is a device that applies an active material mixture to a metal foil. The metal foil is made of a metal such as copper or aluminum as thin and long as about 10 to 20 μm, and is mounted on the coating apparatus 110 while being wound in a roll shape. This metal foil serves as an electrode current collector.
An active material mixture is a mixture containing the active material used for a positive electrode or a negative electrode. For example, the positive electrode active material mixture is made by mixing a positive electrode active material, lithium cobaltate (LiCoO ₂ ), a carbon material conductive agent such as acetylene black or graphite, and a binder dissolved in a solvent into a paste. Can be considered.
In the coating apparatus 110, such a paste-like active material mixture is applied to the metal foil with a predetermined film thickness by a coating method such as a doctor blade method. In that case, the area | region where an active material mixture is apply | coated becomes a elongate area | region along the longitudinal direction of metal foil. There may be a plurality of application regions at predetermined intervals in the width direction of the metal foil.

And in the coating device 110, the film thickness of the apply | coated active material mixture is measured, and a mark is attached | subjected so that the area | region thinner or thicker than the film thickness predetermined according to battery design may be known. The coating device 110 is an example of a coating unit according to the present invention.
Hereinafter, the configuration of the coating apparatus 110 and the processing performed by the coating apparatus 110 will be described in detail with reference to FIGS. 2 to 4.

  As shown in FIGS. 2 and 3, the coating apparatus 110 includes two blades 111 a and 111 b (hereinafter collectively referred to as the blade 111), a laser displacement meter 112, a controller 113, and a laser marker 114. The metal foil 200 is set in the coating device 110 in a state of being wound in a roll, and is conveyed by the belt conveyor 115. The blade 111, the laser displacement meter 112, and the laser marker 114 are arranged in a path along which the metal foil 200 is conveyed in this order.

First, in the coating device 110, the active material mixture is applied to the metal foil 200 by the blade 111 (S101). The blade 111 is a means for applying an active material mixture to the metal foil 200. As shown in FIG. 3, the blade 111 is orthogonal to the longitudinal direction of the metal foil 200 drawn out by the belt conveyor 115, and its blade edge is arranged with a predetermined depression angle. Further, the blade 111 can be moved up and down in the vertical direction with respect to the conveying surface of the belt conveyor by a driving mechanism (not shown). On both sides of the blade 111, partition plates (not shown) are provided so that the active material mixture does not protrude.
Then, the active material mixture is injected between the blade 111 and the metal foil 200 in a state where the blade tip of the blade 111 is disposed on the surface of the metal foil 200, whereby the active material is applied to the surface of the metal foil 200. A mixture is applied. 210a and 210b shown in the figure indicate areas where the active material mixture is applied (hereinafter collectively referred to as application areas 210). Reference numerals 220a to 220c denote regions where the active material mixture is not applied (hereinafter collectively referred to as non-application regions 220).
As shown in the figure, the application region 210 is a band-like region extending in the longitudinal direction of the metal foil 200 with a predetermined width. A plurality of application regions 210 may be formed with a non-application region 220 having a predetermined width interposed therebetween. In the example shown in the figure, the case where there are two rows of application regions 210 is shown, but there may be one row or three or more rows. In that case, as many blades 111 as the number of coating areas 210 required are provided. The blade 111 is an example of an application unit.

Subsequently, in the coating apparatus 110, the film thickness of the active material mixture applied to the metal foil 200 is measured by the laser displacement meter 112 (S102). The laser displacement meter 112 is composed of a laser oscillator and a receiver (laser oscillator and laser receiver) that receives the reflected light reflected from the surface of the active material mixture applied to the metal foil 200 by the laser beam output from the laser transmitter. A triangulation type non-contact displacement meter in which a plurality of sets of light receivers are arranged in the direction perpendicular to the traveling direction of the belt conveyor 115 (in the width direction of the application region 210) and immediately above the belt conveyor 115. Since a plurality of sets of the laser transmitter and the light receiver are arranged in the width direction, the laser displacement meter 112 measures the film thickness in the width direction of the coating region 210 in real time over the entire region. (However, strictly speaking, film thicknesses at a plurality of spots irradiated with the laser beams of the plurality of laser transmitters are measured).
The laser displacement meter 112 transmits data indicating the measured film thickness of each spot in the width direction to the controller 113. The laser displacement meter 112 is an example of a film thickness measuring unit.

Subsequently, in the coating apparatus 110, marking on the non-application area 220 by the laser marker 114 is performed (S103). Specifically, marking is performed as follows.
First, the controller 113 receives data indicating the film thickness at each spot from the laser displacement meter 112. Then, the controller 113 specifies the range of coating unevenness 211a, 211b (hereinafter collectively referred to as coating unevenness 211) based on the received data indicating the film thickness. For example, the controller 113 stores data indicating the allowable range of the film thickness of the active material mixture (for example, the allowable range is within ± 0.5 μm of the set film thickness). It is determined whether or not the film thickness value indicated by the spot data is within an allowable range.
When the controller 113 determines that the film thickness is out of the allowable range, the positions where the film thickness outside the range is detected are collectively referred to as the start points 212a and 212b of the coating unevenness 211 (hereinafter referred to as the start point 212). ).

When the control controller 113 determines the start point 212 of the coating unevenness 211, it transmits a marking signal to the laser marker 114 after a predetermined time has elapsed.
Here, the predetermined time is a time taken from the start point 212 of the coating unevenness 211 to the position directly below the laser marker 114 after passing the measurement position of the laser displacement meter 112. In this embodiment, since the conveyance speed of the belt conveyor 115 is known, the above-mentioned predetermined time can be measured using this conveyance speed and the distance from directly below the laser displacement meter 112 to just below the laser marker 114.

The laser marker 114 that has received the marking signal marks the non-application area 220 of the metal foil 200. Specifically, a start point mark 222a indicating the start point of the coating unevenness 212a in the application region 210a is provided in the non-application region 220a, and a start point mark 222b indicating the start point of the application unevenness 212b in the application region 210b is provided in the non-application region 220b. Mark.

The coating unevenness 211 often spreads so as to extend in the longitudinal direction of the metal foil 200. Note that streaking occurs in the applied active material mixture, which is an example of the coating unevenness 211.
Therefore, if even one of the plurality of spots on the coating region 210a is data that is outside the allowable range, the controller 113 controls the laser marker 114 to mark the start point mark 222a. . Then, after marking the start point mark 222a, when the data indicating the film thickness within the allowable range at all spots among the plurality of spots on the application region 210a is obtained, the controller 113 determines the coating unevenness 211. It determines as an end point, determines the position, and controls the laser marker 114 to mark the end point mark 223a.
Here, when marking the end point mark 223a, the controller 113 transmits a marking signal to the laser marker 114 after the predetermined time elapses, as in the case of marking the start point mark 222a. Then, the laser marker 114 that has received the marking signal marks the end point mark 223a.
Note that the start point mark 222b and the end point mark 223b in the application region 210b are similarly marked.
The start point mark 222 and the end point mark 223 may have different mark shapes, such as a round shape on one side and a star shape on the other side, so that the punching device 160 described later can easily recognize. .
The laser marker 114 is an example of marking means according to the present invention.

As described above, in the electrode manufacturing system 100, the coating material 110 applies the active material mixture to the metal foil 200, and the coating unevenness 211 in the longitudinal direction of the metal foil 200 so that the position of the coating unevenness 211 can be specified. The start point mark 222 and the end point mark 223 are marked at positions corresponding to the start point 212 and the end point 213, respectively.
And after the process by the coating device 110 is completed, the solvent contained in the active material mixture is removed by the drying device 120 to dry the active material mixture. Thereafter, the metal foil 200 is divided into two rolls by the slitting device 130 that slits the non-application area 220c existing between the two application areas (220a and 220b) of the metal foil 200.
Then, the divided active material mixture of each metal foil 200 is compressed by a compression device 140 such as a roll press.
After each of the divided metal foils 200 is dried by the vacuum drying device 150, each of the metal foils 200 is processed by the punching device 160.

In the drying device 120 and the vacuum drying device 150, even if the applied active material mixture is very small, it may shrink due to heat, and as a result, the metal foil 200 may shrink. In the compression device 140, the metal foil 200 is rolled. For this reason, the distance from the start point mark 222 to the end point mark 223 in the metal foil 200 before exiting the coating apparatus 110 and before entering the drying apparatus 120, and the start point in the metal foil 200 after drying is performed by the vacuum drying apparatus 150. The distance from the mark 222 to the end point mark 223 is rarely the same and is usually different.
Therefore, even if marking is performed on the coating unevenness 211, if the marking is only one point, the coating unevenness 211 is discarded in the metal foil 200 that expands and contracts between the coating device 110 and the vacuum drying device 150. A big margin must be expected.
However, even when the metal foil 200 expands and contracts, in the present embodiment, the punching device 160 described later recognizes two marks, a start point mark 222 and an end point mark 223, so that the electrode 230 including the coating unevenness 211 can be accurately detected. Can be discarded.
The punching device 160 is an example of a punching unit according to the present invention.

Hereinafter, the configuration of the punching device 160 and the processing by the punching device 160 will be described with reference to FIGS. 5 and 6.
As shown in FIG. 5, the punching device 160 includes a mark sensor 161, a press machine 162, an inspection machine 163, a controller 164, and an electrode stacking mechanism 165.
The metal foil 200 is set in the punching device 160 in a state of being wound in a roll shape, and is drawn out so as to be conveyed by the belt conveyor 166. Here, unlike the belt conveyor 115, the belt conveyor 166 performs intermittent operation by intermittent operation as described later.
The mark sensor 161, the press 162, and the two electrode stacking mechanisms 165a and 165b (hereinafter collectively referred to as the electrode stacking mechanism 165) are arranged on the belt conveyor 166 in this order in the course of the metal foil 200 being pulled out. Has been placed.
In the following description, an example of processing the metal foil 200a on which the application region 120a is formed will be described.

First, in the punching device 160, as described above, the mark sensor 161 sequentially detects the two marks of the start point mark 222a and the end point mark 223a attached to the metal foil 200a by the laser marker 114 (S201). The mark sensor 161 is a sensor that optically detects the two marks attached to the metal foil 200a. The mark sensor 161 is disposed so as to be located immediately above the non-application area 220a of the metal foil 200a.
The mark sensor 161 detects the start point mark 222a or the end point mark 223a in the non-application area 220a of the metal foil 200a conveyed on the belt conveyor 166, and notifies that these marks have been detected. Data is transmitted to the controller 164. The mark sensor 161 is an example of a mark detection unit according to the present invention.

Subsequently, in the punching device 160, the shape of the electrode is punched by the press machine 162 (S202). A press die having a predetermined shape is attached to the press machine 162, and the press machine 162 moves in the vertical direction with respect to the conveying surface of the metal foil 200a of the belt conveyor 166, thereby punching the metal foil 200a into a shape as usual. Is. The belt conveyor 166 is intermittently operated in synchronization with the press operation of the press machine 162, and the operation is stopped when the press machine 162 punches the metal foil 200a. 230a to 230l shown in the figure indicate electrodes punched by the press 162 (hereinafter collectively referred to as electrodes 230).
The electrode 230 shown in FIG. 5 includes a main body portion 231 punched out from the application region 210 and a tab portion 232 punched out from the non-application region 220. And the remainder of the metal foil 200a that is not used as the electrode 230 remains around the punched electrode 230. The press machine 162 is an example of an electrode punching unit according to the present invention.

  Subsequently, in the punching device 160, the state of the punched electrode is inspected by the inspection machine 163 (S203). The inspection machine 163 inspects whether or not the punched electrode is defective by, for example, image processing. As an example of the defect generated in the electrode, there may be a defect such that the electrode 230 is turned over, a burr is generated, or the active material is detached. When the inspection machine 163 detects the electrode 230 in which a defect has occurred, the inspection machine 163 transmits data notifying that the defect is present to the control controller 164. The controller 164 that has received the data appropriately transmits a later-described stacking stop signal and stacking start signal to the electrode stacking mechanism 165 at a predetermined timing. This point will be described later.

After the inspection, in the punching device 160, the electrodes are stacked and the defective electrodes are discarded by the electrode stacking mechanism 165 (S204).
When the controller 164 sequentially receives from the mark sensor 161 data notifying that the start point mark 222 has been detected and data notifying that the end point mark 223 has been detected, the application between the start point mark 222 and the end point mark 223 is performed. The electrode stacking mechanism 165 is controlled so as not to stack the punched electrodes 230 including the region 210. Further, the electrode stacking mechanism 165 is controlled so that the electrode 230 punched out without including the coating region 210 between the start point mark 222 and the end point mark 223 is stacked on a table 167 described later.
This operation will be described in detail below.

Tables 167 a and 167 b (hereinafter collectively referred to as table 167) for stacking the punched electrodes 230 are placed beside the belt conveyor 166 via the inspection machine 163.
Each of the electrode stacking mechanisms 165a and 165b has a pivotable arm, and sucks the electrodes 230g and 230h on the belt conveyor arranged at predetermined positions using suction means such as a suction cup, and sequentially stacks them on the tables 167a and 167b. To do.
The belt conveyor 166 performs the above intermittent operation. At this time, the belt conveyor 166 stops by placing an electrode at the predetermined position. Here, the belt conveyor 166 advances in the width direction of the electrode 230, and the position where the arm can adsorb the electrode at the center of the width of the electrode 230 is defined as the predetermined position.
In FIG. 5, a white portion of the metal foil 200 a that has the shape of an electrode (substantially rectangular) indicates a trace of the electrode 230 being extracted by the electrode stacking mechanism 165.

When the electrode stacking mechanism 165 receives a control signal (stacking stop signal) to instruct not to stack the electrodes 230 from the controller 164, the electrode stacking mechanism 165 stops stacking the electrodes 230 on the table 167.
When the electrode stacking mechanism 165 receives a control signal (stacking start signal) for instructing to start stacking the electrodes 230 from the controller 164, the electrode stacking mechanism 165 starts stacking the electrodes 230 on the table 167. The defective electrode that has not been adsorbed by the electrode stacking mechanism 165 and the remaining portion of the metal foil 200a are conveyed by the belt conveyor 166 as they are, and automatically fall to the dust box 168 installed at the end of the belt conveyor 166. The dust box 168 is preferably made of a highly cushioning material so that dust or the like is not generated when the defective electrode or the remaining part falls.
The defective electrode and the remainder of the metal foil 200a are collected in the dust box 168 and discarded. In addition to being collected in the dust box 168, it may be wound in a roll shape and collected. The electrode stacking mechanism 165 is an example of a discarding unit according to the present invention.

The timing at which the controller 164 transmits the stacking stop signal and the stacking start signal is as follows.
When the controller 164 receives data notifying that the start point mark 222 has been detected from the mark sensor 161, the controller 164 transmits a stacking stop signal to the electrode stacking mechanism 165 after a predetermined time has elapsed. When the controller 164 receives data notifying that the end point mark 223 has been detected from the mark sensor 161, the controller 164 transmits a stacking start signal to the electrode stacking mechanism 165 after a predetermined time has elapsed.
Here, if the coating unevenness 211 is included in a part of the electrode 230 punched out by the press 162, the electrode 230 is a defective electrode. The controller 164 transmits the stacking stop signal and the stacking start signal so that the defective electrode is not stacked on the table 167.
Specifically, since the press machine 162 and the electrode stacking mechanism 165 operate in accordance with the intermittent operation of the belt conveyor 166, the speed or timing of this intermittent operation and the width direction of the electrode 230 disposed at the predetermined position. From the distance from each of the two end faces (the electrode width is designed in advance to a predetermined value) to the application region corresponding to the position of the metal foil 200 sensed by the mark sensor 161, the controller 164 outputs the above-described stacking stop signal. And the transmission timing of the lamination start signal is calculated. When the coating unevenness 211 is included in the electrode 230 arranged at the predetermined position, when the previous electrode 230 not including the coating unevenness 211 is stacked on the table 167 by the arm, The controller 164 transmits the stacking stop signal to the electrode stacking mechanism 165a or 165b so as not to stack the electrodes 230 having the corresponding coating unevenness 211.
On the other hand, when the electrode 230 including the coating unevenness 211 is disposed at the predetermined position and the electrode 230 without the coating unevenness 211 is disposed at the predetermined position by the next intermittent operation, the coating 230 When the electrode 230 having no unevenness 211 is disposed at the predetermined position, the controller 164 transmits the stacking start signal to the electrode stacking mechanism 165a or 165b so that the corresponding electrode 230 is stacked.

Even when the inspection machine 163 detects the electrode 230 in which a defect has occurred, the controller 164 receives data notifying that the defect is transmitted by the inspection machine 163, and the controller 164 receives the stacking stop signal and the stacking signal. A start signal is appropriately transmitted to the electrode stacking mechanism 165 at a predetermined timing.
Also in this case, as in the case of uneven coating, the speed or timing of the intermittent operation and the two end faces in the width direction of the electrode 230 arranged at the predetermined position (the electrode width is designed to a predetermined value in advance). The controller 164 calculates the transmission timing of the stacking stop signal and the stacking start signal from the distance from each of these to the defect position of the coating region sensed by the inspection machine 163. When a defect is included in the electrode 230 arranged at the predetermined position, the corresponding defective electrode is formed when the previous electrode 230 not including the defect is stacked on the table 167 by the arm. The controller 164 transmits a stacking stop signal to the electrode stacking mechanism 165a or 165b.
On the other hand, when the defective electrode is arranged at the predetermined position and the electrode without defect is arranged at the predetermined position by the next intermittent operation, the electrode without defect is arranged at the predetermined position. At that time, the controller 164 transmits the stacking start signal to the electrode stacking mechanism 165a or 165b so as to stack the corresponding electrodes 230.

  In the present embodiment, the laser marker 114 is marked only with the coating start point mark 222 and end point mark 223, but is not limited thereto. For example, the area from the start mark 222 to the end mark 223 of coating unevenness may be continuously marked by the laser marker 114, or may be intermittently marked.

In the present embodiment, the application area 210 between the start point mark 222 and the end point mark 223 marked by the laser marker 114 is also pressed by the press 162, but is not particularly limited thereto. For example, for the application region 210 between the start point mark 222 and the end point mark 223 marked by the laser marker 114, the controller 164 may perform control to stop the operation of the press machine 162. Since the distance from the mark sensor 161 to the press machine 162 is a predetermined value, the controller 164 performs an operation for control to stop the operation of the press machine 162 in the same manner as the transmission timing of the stack stop signal and the stack start signal. Can do.
In this case, the pressed electrode does not exist between the start point mark 222 and the end point mark 223 in the metal foil 200 a passing through the electrode stacking mechanism 165. Even if the electrode is not actually pressed, the electrode position where the electrode is expected to be formed is apparent on the metal foil. Therefore, the calculation of the controller 164 is not hindered. Since the press is not performed between the start point mark 222 and the end point mark 223, the operating power of the press machine can be reduced, and the recovery and disposal are facilitated.

  In this embodiment, a laser displacement meter is adopted as the film thickness measuring means, but the film thickness measuring means may be any measuring instrument that can measure the film thickness of the active material mixture in a non-contact manner. A measuring instrument other than the laser displacement meter 112 may be employed.

  In this embodiment, the laser marker 114 is used as the marking unit. However, any marking unit other than the laser marker 114 may be used as long as the marking unit can be marked so that the range of the coating unevenness can be recognized. For example, a device that performs physical punching may be employed.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiment.

DESCRIPTION OF SYMBOLS 100 Electrode manufacturing system 110 Coating device 111 Blade 112 Laser displacement meter 113 Control controller 114 Marker 115 Conveyor 120 Drying device 130 Slit device 140 Compression device 150 Vacuum drying device 160 Punching device 161 Mark sensor 162 Press machine 163 Inspection machine 164 Control controller 165 Electrode stacking mechanism 166 Conveyor 167 Table 168 Dust box 200 Metal foil 210 Application area 211 Application unevenness 212 Start point 213 End point 220 Non-application area 222 Start point mark 223 End point mark 230 Electrode 231 Main body part 232 Tab part

Claims (3)

An application part for applying an active material mixture to form an application region and a non-application region on the metal foil;
A drying unit for drying the metal foil applied in the application unit;
And a punch section for punching a plurality of electrodes from drying metal foil by the drying section,
The application part is
Application means for applying;
A film thickness measuring means for measuring the film thickness of the coating area;
A start point mark is attached to the metal foil at the start point of the coating region where the measured film thickness is outside the predetermined range, and an end point mark is attached to the metal foil at the end point of the coating region where the measured film thickness is outside the predetermined range. and a marking means is subjected,
The punched portion is
Mark detection means for detecting the start point mark and the end point mark,
Electrode punching means for punching the metal foil other than at least from the start point mark to the end point mark to form the plurality of electrodes,
Electrode manufacturing system for chromatic and discarding means for discarding said metal foil between at least the start point mark to the end point mark. It said marking means, the electrode manufacturing system of claim 1, subjecting the starting point mark 及 beauty the end point mark on the non-application area. The punching the recessed portions is further to an electrode stack mechanism for sequentially stacking the plurality of electrodes, wherein the electrode hitting Nukite stage was formed,
The electrode stacking mechanism sequentially stacks the electrodes that do not include the metal foil between the start point mark and the end point mark, and among the portions of the metal foil, a portion other than the stacked electrode is the discarding unit. electrode manufacturing system according to claim 1 or 2 discards at.

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