JP2019029065A - Device and method for manufacturing electrode body - Google Patents

Abstract

To avoid an obstacle which becomes disturbance to the drying in the case of an electrode body formed by intermittently coating an active material mixture on both surfaces of a belt-shaped current collector at the same time.SOLUTION: In a manufacturing device of an electrode body, the manufacture of the electrode body is performed, having coated sections which are formed by coating an active material mixture on both surfaces of a belt-shaped current collector in opposition to each other via the current collector at a fixed interval in the longitudinal direction of the current collector, and an uncoated section from which the current collector is exposed at the fixed interval in the longitudinal direction. The manufacturing device for the electrode body described in Claim 1 includes a drying device and a sandwiching section. In the sandwiching section installed inside of the drying device, the rotation is controlled by a drive motor so that the electrode body is sandwiched by the sandwiching section during passage of the uncoated section and also controlled so that the sandwiching section comes into non-contact with the electrode body during passage of the coated sections.SELECTED DRAWING: Figure 3

Description

The present invention relates to a manufacturing apparatus and a manufacturing method of an electrode body used in a step of drying a coated surface formed intermittently on a current collector along a conveying direction of the current collector.

Double-sided coating is known in which an active material mixture or the like is applied to both sides of a current collector, which is a strip-shaped metal foil, at once. In double-sided coating, the active material mixture is not dried until it passes through the drying device after coating, and cannot be supported by a guide roll in the drying device. However, it is known that when vibration caused by hot air or conveyance in the drying apparatus increases, quality such as a change in film pressure at the coating part is adversely affected.
As a conventional technique related to a drying method after double-sided coating, as shown in Patent Document 1, an uncoated part with exposed metal foil surfaces exposed at both ends of a current collector is used to suppress vibration in the drying apparatus. There are known a method of sandwiching with a nip roll and a method of sandwiching with two belts provided with protrusions (clamping portions) at regular intervals on the premise of intermittent coating as shown in Patent Document 2.
When a tabbed electrode is cut out from a strip-shaped electrode substrate, an uncoated portion that is not coated is set according to the direction of the cut out electrode. In the case of intermittent coating in which an active material mixture containing an active material is intermittently applied to the surface of a current collector of a strip-shaped metal foil and uncoated portions are provided at regular intervals, the tab of the electrode to be cut out extends in the transport direction It is assumed that. It is known that when Patent Document 1 is applied to intermittent coating, unnecessary uncoated portions are required at both ends of the electrode base material. A material in which an active material mixture is coated on the surface of a belt-like current collector is called an electrode body.
In Patent Document 2, a belt is interposed between the hot air nozzle of the dryer and the electrode body. The clamping part attached to the belt enables drying of the electrode band in which the active material mixture is intermittently applied to both sides of the current collector.

JP 2014-226635 A Japanese Patent Laid-Open No. 11-138084

  In Patent Document 2, it is possible to make hot air easily pass through, for example, by using a plurality of thin belt intervals, but in a place where hot air is difficult to hit, a state where the wind is difficult to hit continues.

  The present invention has been made in view of the above problems, and in the case of an electrode body in which an active material mixture is intermittently coated on both sides of a belt-like current collector at the same time, an obstacle that hinders drying is prevented. The purpose is that.

  In order to achieve the above object, the present inventors have intensively studied, and as a result, the large diameter portions respectively provided on the pair of sandwiching rolls facing each other through the current collector are not coated portions on the current collector. The inventors have conceived of reducing the number of obstacles that hinder drying by sandwiching the current collector from both sides and transporting the electrode body.

  The apparatus for manufacturing an electrode body according to claim 1, which solves the above-described problem, is provided on both surfaces of a strip-shaped current collector, with the active material coupled relative to the longitudinal direction of the current collector at regular intervals via the current collector. An electrode body having a coated part coated with an agent and an uncoated part where a current collector is exposed at regular intervals in the longitudinal direction is manufactured. The apparatus for manufacturing an electrode body according to claim 1 includes a drying device and a sandwiching portion, and the sandwiching portion installed inside the drying device sandwiches the electrode body with the sandwiching portion when an uncoated portion passes. However, when the coating part passes, the gist is that the rotation is controlled by the drive motor so that the clamping part is not in contact with the electrode body.

According to this, since the clamping part installed in the drying apparatus clamps an uncoated part, it can prevent contacting a wet coating part. In addition, since the rotation of the clamping unit is controlled, it is possible to reduce the size of the clamping unit, and it is possible to reduce the obstacle between the drying device and the electrode body. In addition, the drying device can be expected to be miniaturized, and the distance from the drying device to the electrode body can be shortened.

According to a second aspect of the present invention, in the electrode body manufacturing apparatus according to the first aspect, the clamping unit installed in the drying device has a clamping roll whose rotation is controlled by a drive motor, and the clamping roll is a current collector. It is installed facing the body, and has a large diameter part having a constant diameter on the outer periphery of the sandwiching roll, and a small diameter part having a smaller diameter than the large diameter part, and when the uncoated part passes, The gist is that when the electrode body is sandwiched between the large diameter portions and the coating portion passes, the rotation is controlled by the drive motor so that the small diameter portions face each other and do not contact the electrode bodies.

  According to this, the clamping roller of the clamping part installed in the drying apparatus has a large diameter part and a small diameter part, and is controlled so as to clamp the electrode body at the large diameter part. When the coating portion passes, the small-diameter portion can face and the retracting portion can be retracted to a position where it does not contact the coating portion.

  The invention according to claim 3 is the invention according to claims 1 and 2, wherein the control device has a detecting means, and the rotation of the sandwiching roll is controlled based on the result of the detecting means. The gist is that it is installed downstream of the apparatus and upstream of the sandwiching roll.

According to this, since the rotational speed of the clamping part is controlled based on the result of the detection means of the control part, the uncoated part can be clamped more reliably by the large diameter part. Further, even when the width of the coating part is changed with respect to the transport direction, the drying apparatus can be operated without exchanging equipment such as a shaft and a roll. Therefore, the production efficiency can be maintained high because production can be performed in response to the design change without stopping the facility.

According to a fourth aspect of the present invention, in the first to third aspects of the present invention, while one clamping part is clamping the electrode body, the adjacent clamping part is when the one clamping part is separated from the electrode body. The gist of the invention is to wait while changing the rotation speed so that the electrode body can be clamped.

According to this, the large-diameter portion of the sandwiching roll does not face the same direction, and at least a pair of sandwiching rolls always maintain a state of sandwiching the electrode body. The effect of suppressing the fluttering of the electrode body can be expected.

The invention according to claim 5 is characterized in that, in the inventions according to claims 1 to 4, at least one large-diameter portion of the sandwiching portion has.

According to this, in the inventions of claims 1 to 4, if there is at least one large-diameter portion, the electrode body can be sandwiched by the sandwiching portion.

The gist of the invention of claim 6 is that, in the inventions of claims 1 to 5, the sandwiching part sandwiches the uncoated part of the electrode body.

The structure of Claims 1-6 WHEREIN: It becomes possible to accelerate | stimulate drying of the coating part of an electrode body more efficiently because a clamping part clamps an uncoated part.

The invention of claim 7 is the invention of claims 1 to 6, wherein the large-diameter portion of the sandwiching portion sandwiches the uncoated portion of the electrode body, and the width of the large-diameter portion with respect to the longitudinal direction of the electrode body However, the gist is that it is smaller than the width of the uncoated part.

According to this, since the width of the large diameter portion in the longitudinal direction of the electrode body is smaller than the width of the uncoated portion, it is possible to reduce the size of the sandwiching portion and the drying device. Further, since the sandwiching portion is reduced, the distance between the heat source of the drying device and the electrode body can be shortened, and drying can be performed more efficiently.

The invention according to claim 8 is the invention according to any one of claims 1 to 7, wherein the drying device has a hot air nozzle, and a sandwiching portion is installed at a position that is not in the straight direction from the hot air nozzle to the electrode body. This is the gist.

According to this, the hot air generated from the hot air nozzle can go straight and hit the electrode body without causing the holding portion to be an obstacle. Thereby, drying efficiency can be maintained high.

The gist of the ninth aspect of the present invention is that, in the first to eighth aspects of the invention, the interval between the adjacent clamping portions is not constant.

According to this, if at least one pair of clamping parts can clamp the electrode body, an effect of preventing fluttering can be expected.

The method of manufacturing an electrode body according to claim 10, wherein the active material mixture is applied to both surfaces of the belt-like current collector, with the current collector facing the longitudinal direction of the current collector at regular intervals. The electrode body has a coated portion and an uncoated portion where the current collector is exposed at regular intervals in the longitudinal direction. The method for manufacturing an electrode body according to claim 10 includes a coating step of forming a coating portion on the current collector, and the coating step includes a control device having a drying device, a sandwiching portion, and a detection means. The detection means installed upstream of the drying apparatus with respect to the longitudinal direction of the electrode body detects the position of the uncoated part and the coated part, and the sandwiching process in which the sandwiching part sandwiches the electrode body The gist of the present invention is to include a rotation speed control process for controlling the rotation speed of the clamping unit and a transport process for allowing the electrode body to pass through the inside of the drying device based on the result of the detection means.

According to this, the clamping unit is controlled to clamp the electrode body based on the result obtained by the detection step. Since the rotational speed of the clamping part is controlled based on the result of the detection means of the control part, the uncoated part can be clamped more reliably by the large diameter part. Further, even when the width of the coating part is changed with respect to the transport direction, the drying apparatus can be operated without exchanging equipment such as a shaft and a roll. Therefore, the production efficiency can be maintained high because production can be performed in response to the design change without stopping the facility.

The invention of claim 11 is the invention of claim 10,
When the uncoated part passes, the clamping part installed inside the drying device clamps the electrode body with the clamping part, and when the coating part passes, it is driven so that the clamping part is not in contact with the electrode body The gist is that the rotation is controlled by a motor.

According to this, since the clamping part installed in the drying apparatus clamps an uncoated part, it can prevent contacting a wet coated part. In addition, since the rotation of the clamping unit is controlled, it is possible to reduce the size of the clamping unit, and it is possible to reduce the obstacle between the drying device and the electrode body. In addition, the drying device can be expected to be miniaturized, and the distance from the drying device to the electrode body can be shortened.

The gist of the invention described in claim 12 is a manufacturing method using the manufacturing apparatus described in claims 1-9.

According to this, it becomes a manufacturing method with which the effect by the invention of Claims 1-9 is acquired. It can be expected to prevent the electrode body from fluttering and to maintain high drying efficiency and production efficiency. In addition, miniaturization of the apparatus can be expected.

  According to the present invention, an obstacle that hinders drying can be prevented.

It is a schematic diagram which shows an example of the electrode body manufactured by this invention. It is sectional drawing which shows typically the positional relationship of the manufacturing apparatus of the electrode body which concerns on this invention. It is sectional drawing which shows typically the positional relationship of a clamping roll, an electrode body, and a hot air nozzle. It is sectional drawing which shows the other example of a clamping roll typically.

Embodiments of the present invention will be described below with reference to the drawings.
(First embodiment)

  The electrode body manufacturing apparatus and method of the present invention are included in an apparatus and a process for manufacturing an electrode of a power storage device. In the electrode manufacturing process, the kneading process for kneading the active material mixture, the coating process for forming the coating part on the surface of the current collector of the metal foil, and increasing the density of the layer made of the active material mixture in the coating part A pressing step and a cutting step of cutting out the electrode from the electrode body are included. The coating process for forming the coating portion on the current collector of the metal foil includes two steps: a step of coating the active material mixture on the surface of the current collector and a step of drying the coated portion after coating. included. The electrode body manufacturing method and manufacturing apparatus of the present invention are about a process of drying a coated part after coating, and an electrode body manufacturing apparatus used in the process.

  First, an embodiment embodying the present invention will be described with reference to FIGS.

  Equipment relating to the coating process includes a transport device, a coating device, a drying device, a clamping unit, and a control device.

  FIG. 1 is a schematic view showing an example of an electrode body 15 according to the present invention. As shown in FIG. 1, coating portions 13 are intermittently formed on both surfaces of the current collector 11 along the longitudinal direction X of the current collector 11. The coating part 13 is an area formed by coating the active material mixture 12 on the surface of the current collector 11 in a layered manner at regular intervals. Moreover, between the coating part 13 and the coating part 13 which were formed intermittently on both surfaces of the current collector 11, an uncoated part where the current collector 11 was exposed at regular intervals in the longitudinal direction X 14 is formed. In this embodiment, FIG. 1A shows a case where the coating surface is applied intermittently with the size of one electrode. In FIG. 1, in addition to the uncoated portion 14 where the current collector 11 is exposed at regular intervals with respect to the longitudinal direction X, an uncoated portion 14 is provided in parallel along the longitudinal direction X of the current collector 11. However, the uncoated portion 14 extending along the longitudinal direction X may be omitted.

The uncoated part 14 is used as a part of the electrode. The current collector 11 uses a metal foil containing any one of Cu, Al, Ni, Fe, Ag, Zn, Mo, Ti, Mn, Co, Rh, Pt, and Pb. The dried electrode body 15 is cut and becomes an electrode. The uncoated part 14 left on the outer periphery of the coated part 13 when the electrode is cut is used as an electrode tab.

Next, the manufacturing apparatus 20 will be described in detail. FIG. 2 is a cross-sectional view schematically showing the positional relationship of the electrode body manufacturing apparatus 20 according to the present invention.

As shown in FIG. 2, the electrode body manufacturing apparatus 20 of the present invention includes a transport device 30, a coating device 40, a drying device 50, a clamping unit 60, and a control device 70. The electrode body 15 can be dried by applying the active material mixture 12 to the current collector 11 and passing the electrode body 15 having the wet coating part 13 through the drying device 50.

As shown in FIG. 2, the transport device 30 includes a delivery roll 31, a take-up roll 32, and a guide roll 33. The delivery roll 31 is a belt-shaped metal foil current collector 11 wound around a jig (reel) and is driven by a motor. The take-up roll 32 refers to a roll obtained by winding the electrode body 15 having the coating portion 13 formed on the surface of the current collector 11 with a jig (reel), and is driven by a motor. The guide roll 33 changes the direction of the strip-shaped metal foil current collector 11 and feeds it in the horizontal direction.

The coating device 40 is provided with a die head 41, and the active material mixture 12 supplied by a pump is discharged from the slit of the die head 41. The die head 41 is provided on both surfaces of the current collector 11. The die head 41 coats the active material mixture 12 on both surfaces of the current collector 11 at regular intervals with respect to the longitudinal direction X of the current collector 11 via the current collector 11. The coating device 40 is installed downstream of the delivery roll 31 and upstream of the drying device 50.

The drying device 50 is installed downstream of the die head 41 and upstream of the take-up roll 32, and has a drying chamber 51, a hot air nozzle 52, and an exhaust port 53. The drying chamber 51 is partitioned by a housing and forms a space through which the current collector 11 passes. In order to dry the coating part 13, it is maintained at high temperature. The hot air nozzle 52 injects the gas heated by the heater in the hot air injection direction H. It is preferable that the coating part 13 faces the hot air injection direction H. In this embodiment, air is used as the gas. A plurality of hot air nozzles 52 are installed above and below the conveyance path in the drying chamber 51. The exhaust port 53 discharges air mixed with the solvent emitted from the active material mixture 12 in the drying chamber 51. The solvent mixed in the air is separated by a filter, and the separated air is reused for drying.

The sandwiching unit 60 is installed inside the drying device 50 and includes a plurality of pairs of sandwiching rolls 61 that form a pair. A pair of sandwiching rolls 61 are arranged to face each other via the current collector 11. A large-diameter portion 62 having a constant diameter and a small-diameter portion 63 having a smaller diameter than the large-diameter portion 62 are provided on the outer periphery of the sandwiching roll 61. With respect to the longitudinal direction X, the width of the large diameter portion 62 is smaller than the width M of the uncoated portion 14 (the uncoated portion 14 where the current collector 11 is exposed at regular intervals). In the present embodiment, as shown in FIG. 2 or 3, the sandwiching roll 61 has a cross shape, and the current collector 11 is sandwiched by the large diameter portion 62. The rotation speed of the clamping roll 61 is controlled by a drive motor. When the uncoated part 14 passes, the large diameter part 62 sandwiches the uncoated part 14 and when the coated part 13 passes, the small diameter part. 63 faces the coating part 13 and maintains a non-contact state with the coating part 13 and the current collector 11. The rotational speed is synchronized when the uncoated part 14 is sandwiched, and may be decelerated or stopped when facing the coated part 13. As shown in FIG. 3, the wind from the hot air nozzle 42 is ejected in the hot air ejection direction H, and is installed at a position where the sandwiching roll 61 does not enter in the straight direction of the hot air ejection direction H. That is, the sandwiching roll 61 is arranged at a position that is not in the straight direction from the hot air nozzle 42 to the electrode body 15.
The large diameter part 62 of the clamping part 60 of this embodiment is comprised from the heat resistant elastic material.

The control device 70 includes a detection unit 71, determines the uncoated portion 14 based on the detection result of the detection unit 71, and controls the rotation of the drive motor. The detection means 71 is installed downstream of the die head 41 (coating apparatus 40) and upstream of the sandwiching roll 61 (drying apparatus 50) with respect to the longitudinal direction X, and the coating unit 13 and the uncoated part 14 are installed. The position of is detected. The control device 70 controls the drive motor of the take-up roll 32 and conveys the current collector 11 (electrode body 15) at a constant speed. Based on the conveyance speed and the detection result of the detection means 71, the position of the uncoated portion 14 is determined. The control device 70 also controls the rotation of the drive motor of the pinching roll 61. That is, the control device 70 also controls the rotational speed of the pinching roll 61 based on the detection result of the position of the uncoated part 14 by the detection means 71.

Next, the operation of this embodiment will be described. In the present embodiment, a clamping part 60 that clamps only the uncoated part 14 is provided, and the electrode body 15 is conveyed by a clamping roll 61 that is paired up and down via the current collector 11. The wet active material mixture 12 is dried by passing the electrode body 15 through the drying device 50. In the longitudinal direction (conveying direction) X, on the basis of the detection results of the detection means 71 installed downstream of the die head 41 and upstream of the sandwiching roll 61, the control device 70 ensures that only the uncoated portion 14 is sandwiched. The rotation of the pinching roll 61 is controlled.

In this embodiment, since the clamping part 60 is not installed in the straight direction from the hot air nozzle 52 to the electrode body 15, the clamping part 60 does not hinder the hot air injection direction H.

In the present embodiment, the interval W between the adjacent sandwiching rolls 61 in the longitudinal direction X is a fixed length. Further, the large diameter portions 62 of the adjacent sandwiching rolls 61 sandwich the current collectors 11 alternately. While one holding part 60 is holding the current collector 11, the adjacent holding parts 60 are rotated at a rotational speed to hold the current collector 11 when the one holding part 60 is separated from the current collector 11. I am waiting to change. In addition, the space | interval W of the adjacent clamping roll 61 does not need to be constant.

In the present embodiment, in the longitudinal direction X of the electrode body 15, the width at which the large-diameter portion 62 contacts the uncoated portion 14 is smaller than the width M of the uncoated portion 14. 13 is prevented from touching.

Therefore, this embodiment has the following effects.

(1) Since the clamping unit 60 is installed at a position that does not hinder the hot air injection direction H, the hot air emitted from the hot air nozzle 52 is injected to the electrode body 15 without hitting an obstacle. For this reason, it becomes possible to keep the drying efficiency high.
(2) Since the control device 70 controls the rotation speed of the sandwiching roll 61, the adjacent sandwiching portions 60 can alternately sandwich the current collector 11 of the electrode body 15. At least one pair of clamping parts 60 securely clamps the current collector 11 and suppresses fluttering of the foil.
(3) In the longitudinal direction X, the width of the large-diameter portion 62 of the sandwiching portion 60 is smaller than the width M of the uncoated portion 14, so that the sandwiching roll 61 can be downsized. For this reason, the distance between the hot air nozzle 52 and the electrode body 15 can be shortened, and the internal space in the drying chamber 51 can also be reduced. Therefore, the internal space of the drying chamber 51 and the surface of the electrode body 15 can be held at a high temperature by using a small amount of heat. It becomes possible to dry the wet active material mixture 12 of the coating part 13 with high drying efficiency.
(4) Since the rotational speed of the pinching roll 61 is controlled by the control device 70, the coating portion in the longitudinal direction X can be obtained without considering the size of the large diameter portion 62 and the small diameter portion 63 of the pinching roll 61. The width of 13 can be changed. For this reason, it is possible to cope with a design change without exchanging fixtures such as the clamping unit 60, and it is possible to maintain high production efficiency.
(5) According to the configuration of the present invention, the width of the large-diameter portion of the pinching roll 61 in the longitudinal direction X is smaller than the width M of the uncoated portion 14 in the longitudinal direction X. For this reason, the pinch roll 61 can be downsized, and the drying device 50 can be downsized.

The above embodiment shows an embodiment of the present invention, and the present invention is not limited to the above embodiment, and various modifications are possible within the scope of the invention as described below. Is possible.
(Other embodiments)
As shown in FIG.1 (b), it can respond also to the case where the coating part 13 is intermittently applied by the size of two electrodes, and then cut into two to form electrodes.
In the above embodiment, the sandwiching roll 61 has a large-diameter portion 62 provided in a cross shape. However, even if it has the following shape, the same effect can be obtained.
In the clamping unit 60, the clamping roll 61 may be provided with at least one large diameter part 62. For this reason, a thing as shown in FIG. 4 can be mentioned. FIG. 4 shows a case where the holding roll 61 has one large diameter portion 62. In this case, the large-diameter portion 62 faces only in one direction, and when the uncoated portion 14 is not close, the large-diameter portion 62 stands by in a direction different from the direction in contact with the electrode body 15. ing.
Further, although not shown, a sandwiching roll 61 having a polygonal cross-sectional shape may be used. A sandwiching roll 61 having a cross section such as a triangle, a quadrangle, or a pentagon may be used.
Moreover, although not shown in figure, you may use the clamping roll 61 which has the cross-sectional shape which deform | transformed the center part of each edge | side of a polygon in the center direction of a polygon. For example, a sandwich roll having a star-shaped cross section can be mentioned.
In any case, when the clamping part 60 is in contact with the uncoated part 14, the diameter of the large diameter part 62 of the clamping roll 61 in the longitudinal direction X is greater than the width M of the uncoated part 14 in the longitudinal direction X. small.
The heat source of the drying device 50 may not be a drying heater. Any device that generates heat, such as an infrared heater, may be used.
○ In the sandwiching portion 60, if the large diameter portion 62 of the pair of sandwiching rolls 61 always maintains the state of sandwiching the electrode body 15, the interval W between the sandwiching rolls 61 adjacent in the longitudinal direction X is all. It doesn't have to be the same. According to the present invention, in order to always maintain the state in which the large-diameter portion 62 of at least one pair of the sandwiching rolls 61 sandwiches the electrode body 15, the intervals W between the sandwiching rolls 61 adjacent in the longitudinal direction X are not all the same. It is not necessary. The interval W may be two types of lengths n and 1.5n, or three types of lengths n, 1.5n and 2n.

DESCRIPTION OF SYMBOLS 11 Current collector 12 Active material mixture 13 Coating part 14 Uncoated part 15 Electrode body 20 Electrode body manufacturing apparatus 30 Conveying apparatus 31 Feeding roll 32 Winding roll 33 Guide roll 40 Coating apparatus 41 Die head 50 Drying apparatus 51 Drying chamber 52 Hot air nozzle 53 Exhaust port 60 Nipping part 61 Nipping roll 62 Large diameter part 63 Small diameter part 70 Control device 71 Detection means X Longitudinal direction (conveying direction)
H Hot air injection direction W Interval between adjacent rolls in the conveyance direction M Width n of uncoated part in the conveyance direction Length of the interval W between certain adjacent rolls

Claims (12)

A coating part in which an active material mixture is applied to both surfaces of a strip-shaped current collector relative to the longitudinal direction of the current collector at regular intervals via the current collector;
In the apparatus for manufacturing an electrode body having an uncoated portion where the current collector is exposed at a constant interval with respect to the longitudinal direction,
The manufacturing apparatus includes:
It has a drying device and a clamping part,
The clamping unit installed inside the drying device is:
When the uncoated part passes, sandwich the electrode body with the sandwiching part,
An apparatus for manufacturing an electrode body, wherein the rotation is controlled by a drive motor so that the clamping section is not in contact with the electrode body when the coating section passes. The clamping unit installed inside the drying apparatus has a clamping roll whose rotation is controlled by the drive motor,
The sandwiching rolls are installed to face each other through the current collector,
A large diameter portion having a constant diameter on the outer periphery of the sandwiching roll, and a small diameter portion having a smaller diameter than the large diameter portion,
When the uncoated part passes, sandwich the electrode body with the large diameter part,
The apparatus for manufacturing an electrode body according to claim 1, wherein when the coating portion passes, the small-diameter portion faces and the rotation is controlled by the drive motor so as not to contact the electrode body. The manufacturing apparatus includes a coating apparatus and a control apparatus, the control apparatus includes a detection unit, and the rotation of the clamping roll is controlled based on a result of the detection unit. The electrode body manufacturing apparatus according to claim 1, wherein the electrode body manufacturing apparatus is installed downstream of the coating apparatus and upstream of the sandwiching roll. While one said clamping part clamps the said electrode body, the said adjacent clamping part changes a rotational speed so that the said electrode body can be clamped when one said clamping part leaves | separates from the said electrode body. The electrode body manufacturing apparatus according to claim 1, wherein the apparatus is on standby. The apparatus for manufacturing an electrode body according to claim 2, wherein at least one large-diameter portion of the clamping portion is provided. The said clamping part clamps the said uncoated part of the said electrode body. The manufacturing apparatus of the electrode body of Claims 1-5. The large-diameter portion of the sandwiching portion sandwiches the uncoated portion of the electrode body,
The electrode body manufacturing apparatus according to claim 2, wherein a width of the large diameter portion is smaller than a width of the uncoated portion with respect to a longitudinal direction of the electrode body. The electrode body manufacturing apparatus according to claim 1, wherein the drying device includes a hot air nozzle, and the clamping unit is installed at a position that is not in a straight direction from the hot air nozzle to the electrode body. The apparatus for manufacturing an electrode body according to claim 1, wherein an interval between adjacent clamping parts is not constant. A coating part in which an active material mixture is applied to both surfaces of a strip-shaped current collector relative to the longitudinal direction of the current collector at regular intervals via the current collector;
In the method of manufacturing an electrode body having an uncoated portion where the current collector is exposed at regular intervals with respect to the longitudinal direction,
The manufacturing method includes a coating step of forming the coating portion on the current collector,
The coating process includes
A drying device, a clamping unit, and a control device having a detection means,
The detecting means installed upstream of the drying device with respect to the longitudinal direction detects the position of the uncoated part and the coated part,
A clamping step in which the clamping unit clamps the electrode body; and
A rotational speed control step for controlling the rotational speed of the clamping unit according to the result of the detection means;
The manufacturing method of an electrode body which has a conveyance process which passes the said electrode body inside the said drying apparatus. The clamping unit installed inside the drying device is:
When the uncoated part passes, sandwich the electrode body with the sandwiching part,
The method of manufacturing an electrode body according to claim 10, wherein when the coating portion passes, rotation is controlled by a drive motor so that the clamping portion is not in contact with the electrode body.   The manufacturing method of the electrode body using the manufacturing apparatus of Claims 1-9.

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