JP2021113659A - Electrode material dryer - Google Patents

Abstract

To provide an electrode material dryer capable of correcting meandering of an electrode material in the lateral direction.SOLUTION: An electrode material dryer comprises a drying furnace in which an electrode material is conveyed in the longitudinal direction, and a fourth air blowing device 34 disposed in the drying furnace to blow air to an active substance mixture of the electrode material. The fourth air blowing device 34 comprises a main air blowing part 41 comprising a cylindrical roller member 42 and a communication passage 42h communicating the inside and the outside of the roller member 42, an air feeding part that feeds air into the roller member 42 from both sides in the axial direction of the roller member 42, and a plurality of distribution plates 43 each arranged with a gap apart in the width direction, namely a direction along the lateral direction of the electrode material and each having a recess 46 recessed from a second face 43b opposed to the electrode material. The roller member 42 is disposed in a second storage space S2 demarcated by the plurality of recesses 46 arranged in the width direction, in a state with its axis L extending along the width direction.SELECTED DRAWING: Figure 5

Description

The present invention relates to an electrode material drying device that dries a slurry of an electrode material in which a slurry is coated on a long strip-shaped base material.

Patent Document 1 discloses an electrode material drying device that dries a slurry of an electrode material in which a slurry is coated on a long strip-shaped base material. The drying device includes a drying furnace in which the electrode material is internally conveyed in the longitudinal direction, and a blowing device which is arranged inside the drying furnace and blows air toward the slurry. After the slurry has been dried by the drying device, the electrode material is taken up by a take-up roll.

Japanese Unexamined Patent Publication No. 2015-219983

In such an electrode material drying device, the air sent from the blower causes turbulence in the drying furnace, so that the electrode material may meander so as to swing in the lateral direction. In this case, the electrode material coming out of the drying oven is wound around the take-up roll in a meandering state, so that the short end of the electrode material is displaced in the axial direction of the take-up roll, so-called unwinding. Occurs.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a drying device for an electrode material capable of correcting meandering of the electrode material in the lateral direction.

The electrode material drying device for solving the above problems includes a drying furnace in which an electrode material having a long strip-shaped base material and a slurry coated on the base material is internally conveyed in the longitudinal direction, and the above. A drying device for an electrode material, which is arranged inside a drying furnace and includes a blower for blowing air toward the slurry. The blower communicates a tubular roll member with the inside and outside of the roll member. The distance between the main blower portion having the communication passage, the air supply portion that supplies air into the roll member from both sides in the axial direction of the roll member, and the width direction that is the direction along the lateral direction of the electrode material. The roll member has a plurality of rectifying plates which are arranged apart from each other and have recesses recessed from an opposing surface facing the electrode material, and the roll member has the width in a state where the axis extends along the width direction. The gist is that they are arranged in a storage space partitioned by a plurality of the recesses arranged in a direction.

According to this, the air supplied from the air supply unit into the roll member of the main blower unit flows out of the roll member from the communication passage. Since the inside of the roll member and the rectifying plates adjacent to each other in the width direction communicate with each other through a communication passage, the air sent from the roll member of the main blower portion is rectified by flowing between the rectifying plates adjacent to each other in the width direction. Therefore, air is less likely to interfere in the width direction, and turbulent flow in the drying furnace is suppressed. Therefore, it is possible to correct the meandering of the electrode material in the lateral direction.

Further, with respect to the electrode material drying device, the plurality of rectifying plates can be tilted in a direction orthogonal to the axis of the roll member, and the electrode material is tilted from the first end in the width direction to the first. When meandering in the first direction toward the second end located on the opposite side of the end, the facing surface is in the width direction with respect to the opposite surface which is the surface opposite to the facing surface. When the electrode material is inclined so as to be located on the first end side and the electrode material is meandering in a second direction opposite to the first direction in the width direction, the facing surface is inclined. It is preferable to incline so as to be located on the second end side in the width direction with respect to the opposite surface.

According to this, the direction of the flow of air flowing between the adjacent straightening vanes in the width direction is changed by inclining the plurality of straightening vanes in the direction orthogonal to the axis of the roll member. Specifically, when the electrode material meanders in the first direction in the width direction, the air is rectified by the straightening vane so as to flow in the second direction. Therefore, the electrode material meandering in the first direction is pressed in the second direction by the air. On the other hand, when the electrode material meanders in the second direction in the width direction, the air is rectified by the straightening vane so as to flow in the first direction. Therefore, the electrode material meandering in the second direction is pressed in the first direction by the air. In this way, by inclining the plurality of straightening vanes according to the meandering direction of the electrode material, the meandering of the electrode material in the lateral direction can be further corrected.

Further, regarding the electrode material drying device, the first air supply amount supplied into the roll member from the first end of the roll member located at the first end in the width direction and the said in the width direction. The second air supply amount supplied into the roll member from the second end of the roll member located at the second end located on the side opposite to the first end can be set individually, and the said. When the electrode material is meandering in the first direction from the first end to the second end in the width direction, the second air supply amount is larger than the first air supply amount. When the electrode material is set and meanders in a second direction opposite to the first direction, the first air supply amount is larger than the second air supply amount. It is preferable to set many.

According to this, by making the first air supply amount and the second air supply amount different, the amount of air sent from the main blower portion to the electrode material can be made different in the width direction. Specifically, when the electrode material meanders in the first direction in the width direction, the second air supply amount is set to be larger than the first air supply amount, so that the main blower can be used. The amount of air sent to the electrode material is larger on the second end side than on the first end side in the width direction. Therefore, the electrode material meandering in the first direction is pressed in the second direction by the air. On the other hand, when the electrode material meanders in the second direction in the width direction, the first air supply amount is set to be larger than the second air supply amount, so that the electrode material is transferred from the main blower portion. The amount of air sent is larger on the first end side than on the second end side in the width direction. Therefore, the electrode material meandering in the second direction is pressed in the first direction by the air. In this way, by setting the first and second air supply amounts according to the meandering direction of the electrode material, the meandering of the electrode material in the lateral direction can be further corrected.

Further, regarding the electrode material drying device, the blower is arranged on the downstream side of the main blower in the transport direction of the electrode material, and is located between the straightening vanes adjacent to each other in the width direction in the transport direction. A plurality of sub-blowers that are located upstream of the above and between the rectifying plate in the width direction and between the main blower and the sub-blower in the transport direction. It has a partition plate, and the amount of air blown from the sub-blower can be set individually, and the electrode material is located on the side opposite to the first end from the first end in the width direction. When meandering in the first direction toward the two ends, the amount of air blown from the sub-blower located on the second end side in the width direction is located on the first end side in the width direction. When the amount of air blown from the sub-blower is set to be larger than the amount of air blown from the sub-blower and the electrode material is meandering in a second direction opposite to the first direction, the first in the width direction. It is preferable that the amount of air blown from the sub-blower located on the one end side is set to be larger than the amount of air blown from the sub-blower located on the second end side in the width direction.

According to this, the amount of air blown by the sub-blower located on the first end side in the width direction and the amount of air blown by the sub-blower located on the second end side in the width direction are made different from each other from the sub-blower. The amount of air sent to the electrode material can vary in the width direction. Specifically, when the electrode material meanders in the first direction in the width direction, the amount of air blown from the sub-blower located on the second end side in the width direction is the first end side in the width direction. By setting more than the amount of air blown from the sub-blower located in, the amount of air sent from the sub-blower to the electrode material is larger on the second end side than on the first end side in the width direction. Therefore, the electrode material meandering in the first direction is pressed in the second direction by the air. On the other hand, when the electrode material meanders in the second direction in the width direction, the amount of air blown from the sub-blower located on the first end side in the width direction is located on the second end side in the width direction. By setting more than the amount of air blown from the sub-blower, the amount of air sent from the sub-blower to the electrode material is larger on the first end side than on the second end side in the width direction. Therefore, the electrode material meandering in the second direction is pressed in the first direction by the air. In this way, by setting the amount of air blown from the sub-blower portion according to the meandering direction of the electrode material, the meandering of the electrode material in the lateral direction can be further corrected.

According to the present invention, it is possible to correct the meandering of the electrode material in the lateral direction.

Perspective view of the electrode sheet. The cross-sectional view which shows a part of the manufacturing method of an electrode sheet. Sectional drawing of the electrode material drying apparatus. The perspective view of the 4th blower of 1st Embodiment. The plan view of the 4th blower of 1st Embodiment. The side view of the 4th blower of 1st Embodiment. FIG. 3 is a cross-sectional view of the fourth blower in a non-tilted state. FIG. 3 is a cross-sectional view of a fourth blower in a first inclined state. FIG. 3 is a cross-sectional view of a fourth blower in a second inclined state. The block diagram of the air supply part. The plan view which shows the operation of a nozzle unit. The plan view which shows the operation of a nozzle unit. The cross-sectional view which shows the operation of the 4th blower of 2nd Embodiment. The cross-sectional view which shows the operation of the 4th blower of 2nd Embodiment.

(First Embodiment)
Hereinafter, the first embodiment in which the electrode material drying apparatus is embodied will be described with reference to FIGS. 1 to 12.

First, an electrode sheet manufactured by using an electrode material drying device will be described.
As shown in FIG. 1, the electrode sheet 10 includes a metal foil 11 as a long strip-shaped base material, a first active material layer 12a existing on a first surface 11a of the metal foil 11, and a first metal foil 11. It includes a second active material layer 12b existing on a second surface 11b opposite to the surface 11a. The first active material layer 12a and the second active material layer 12b of the present embodiment exist over the entire longitudinal direction of the metal foil 11 and have a constant width at the center of the metal foil 11 in the lateral direction.

Next, a method for manufacturing the electrode sheet will be described.
As shown in FIG. 2, the electrode sheet is manufactured by the first coating step P1 of applying the active material mixture 120 as a slurry on the first surface 11a of the long strip-shaped metal foil 11 and the long strip-shaped metal leaf 11. It has a second coating step P2 for coating the active material mixture 120 on the second surface 11b of the metal foil 11. The active material mixture 120 is a precursor of the first active material layer 12a and the second active material layer 12b, and is a paste in which the active material, the conductive agent, the binder, and the solvent are mixed. Hereinafter, the metal foil 11 having the active material mixture 120 coated on the first surface 11a and the second surface 11b is referred to as an electrode material 10a.

Further, the method for manufacturing the electrode sheet is as follows: a drying step P3 for drying the active material mixture 120 coated on the first surface 11a and the second surface 11b, and pressing the electrode material 10a to produce the active material mixture 120. It has a pressing step (not shown) that increases the density of the active material in. By the pressing process, the first active material layer 12a is formed from the active material mixture 120 coated on the first surface 11a, and the active material mixture 120 to the second active material layer 12b coated on the second surface 11b. Is formed. Therefore, the electrode sheet 10 is completed.

Next, the electrode sheet manufacturing apparatus 20 will be described.
As shown in FIG. 2, the electrode sheet manufacturing device 20 includes a transport device 21 that transports the long strip-shaped metal foil 11 in the longitudinal direction. The transport device 21 includes a supply roll 22 for supplying the metal foil 11 and a take-up roll 23 for winding up the electrode material 10a after the drying step P3. The metal leaf 11 is unwound from the supply roll 22 by rotating the take-up roll 23. The direction in which the metal foil 11 is conveyed is defined as the conveying direction. The transport direction coincides with the longitudinal direction of the metal foil 11. Further, the direction along the lateral direction of the metal foil 11 is defined as the width direction. The width direction is a direction orthogonal to the transport direction.

The electrode sheet manufacturing apparatus 20 includes a first coating apparatus 24 that performs the first coating step P1, a second coating apparatus 25 that performs the second coating step P2, and an electrode material drying apparatus that performs the drying step P3. 26 (hereinafter, simply referred to as a drying device 26) is provided. The first coating device 24 is arranged on the downstream side of the supply roll 22 and on the upstream side of the take-up roll 23 in the transport direction. The second coating device 25 is arranged on the downstream side of the first coating device 24 in the transport direction. The drying device 26 is arranged on the downstream side of the second coating device 25 in the transport direction.

The first coating device 24 of the present embodiment includes a first die 27 and a backup roll 28 arranged at intervals from the first die 27. The metal leaf 11 is conveyed between the first die 27 and the backup roll 28. The metal foil 11 is conveyed with the first surface 11a facing the discharge port 27a of the first die 27 and the second surface 11b sliding with respect to the outer peripheral surface of the backup roll 28. The active material mixture 120 discharged from the discharge port 27a of the first die 27 is applied to the first surface 11a of the metal foil 11.

The second coating device 25 includes a second die 29. The metal foil 11 is conveyed with the second surface 11b facing the discharge port 29a of the second die 29. The active material mixture 120 discharged from the discharge port 29a of the second die 29 is applied to the second surface 11b of the metal foil 11. As a result, the electrode material 10a in which the active material mixture 120 is coated on the first surface 11a and the second surface 11b of the metal foil 11 is formed.

As shown in FIG. 3, the drying device 26 includes a drying furnace 30. The drying furnace 30 has a box shape having a square tubular peripheral wall 30a and a pair of end walls 30b covering both ends of the peripheral wall 30a in the axial direction. The drying oven 30 has an inlet 301 at one end wall 30b and an outlet 302 at the other end wall 30b of the pair of end walls 30b. The electrode material 10a is transported from the inlet 301 into the drying furnace 30, dried in the drying furnace 30, and then transported from the outlet 302 to the outside of the drying furnace 30. The take-up roll 23 winds up the electrode material 10a that has come out of the drying oven 30. The electrode material 10a is horizontally conveyed in the drying furnace 30 so that the first surface 11a of the metal foil 11 is the upper surface and the second surface 11b of the metal foil 11 is the lower surface.

The drying device 26 includes a plurality of blowers arranged in the drying furnace 30. The drying device 26 of the present embodiment includes five first blower devices 31, one second blower device 32, five third blower devices 33, and one fourth blower device 34.

The five first blower devices 31 and the one second blower device 32 are arranged above the electrode material 10a. The five first blower devices 31 are arranged side by side at intervals in the transport direction, and the second blower device 32 is arranged on the downstream side of the first blower device 31 in the transport direction. Five third blowers 33 and one fourth blower 34 are arranged below the electrode material 10a. The five third blower devices 33 are arranged side by side at intervals in the transport direction, and the fourth blower device 34 is arranged on the downstream side of the third blower device 33 in the transport direction. Further, the first blower device 31 and the third blower device 33 are alternately arranged in the transport direction. In other words, the first blower device 31 and the third blower device 33 are not arranged so as to face each other with the electrode material 10a in the direction orthogonal to both the transport direction and the width direction. The fourth blower device 34 is arranged on the upstream side of the second blower device 32 in the transport direction.

The first blower 31 and the second blower 32 send air toward the active material mixture 120 coated on the first surface 11a of the metal foil 11, and the third blower 33 and the fourth blower 34 , Air is sent toward the active material mixture 120 coated on the second surface 11b of the metal foil 11. At this time, the temperature of the air sent from the second blower 32 and the fourth blower 34 to the electrode material 10a is higher than the temperature of the air sent from the first blower 31 and the third blower 33 to the electrode material 10a. .. Further, the amount of air sent from the second blower 32 and the fourth blower 34 to the electrode material 10a is larger than the amount of air sent from the first blower 31 and the third blower 33 to the electrode material 10a.

The active material mixture 120 coated on the first surface 11a of the metal foil 11 is dried by the air sent from the first blower 31 and the second blower 32, and is coated on the second surface 11b of the metal foil 11. The active material mixture 120 is dried by the air sent from the third blower 33 and the fourth blower 34. Further, the electrode material 10a is conveyed in a state of being floated from the third blower 33 and the fourth blower 34 by the air sent from the third blower 33 and the fourth blower 34.

In the drying furnace 30, the region where drying is performed by the first blower 31 and the third blower 33 is designated as the first drying region A1, and the region where drying is performed by the second blower 32 and the fourth blower 34 is the first. 2 Dry area A2. The second dry region A2 is a region located downstream of the first dry region A1 in the transport direction. The length of the first dry region A1 along the transport direction is longer than the length of the second dry region A2 along the transport direction.

The purpose of the first dry region A1 is to evaporate the solvent from the surface of the active material mixture 120 at a constant rate. The fluidity of the active material mixture 120 in the electrode material 10a after passing through the first dry region A1 is lower than the fluidity of the active material mixture 120 in the electrode material 10a before passing through the first dry region A1. .. The second drying region A2 aims to remove the solvent remaining inside the active material mixture 120 by rapidly drying the active material mixture 120. When the electrode material 10a passes through the second drying region A2, the drying of the active material mixture 120 is completed.

The fourth blower device 34 will be described in detail.
As shown in FIGS. 4 and 5, the fourth blower device 34 includes a main blower unit 41. The main blower 41 has a cylindrical roll member 42. Rotating shafts (not shown) rotatably supported by shaft support members (not shown) are attached to both ends of the roll member 42 in the axial direction. By rotating the rotating shaft with a motor (not shown), the roll member 42 rotates integrally with the rotating shaft. Inside the roll member 42 is an air flow path 41a through which air supplied from the air supply unit 50, which will be described later, flows.

As shown in FIG. 5, the main blower portion 41 has a plurality of communication passages 42h that communicate the inside and outside of the roll member 42 by penetrating the roll member 42 in the radial direction. In FIG. 4, the illustration of the communication passage 42h is omitted. The plurality of communication passages 42h are arranged in the axial direction and the circumferential direction of the roll member 42. The air flowing through the air passage 41a can flow out of the roll member 42 through the communication passage 42h. That is, the main blower 41 sends air from the inside of the roll member 42 in the radial direction to the outside of the roll member 42 in the radial direction. In the present embodiment, the air blown from the main air blowing unit 41 is intermittently performed. "Blowers from the main blower 41 are intermittently performed" means that the blower operation in which the main blower 41 sends air and the non-blower operation in which the main blower 41 does not send air are alternately repeated. Point to.

As shown in FIGS. 4 and 5, the fourth blower 34 accommodates a plurality of straightening vanes 43, a plurality of partitioning plates 44, a plurality of straightening vanes 43, and a plurality of partitioning plates 44. 1 A storage member 45 having a storage space S1 is provided. Although FIGS. 4 and 5 show a fourth blower 34 including 17 straightening vanes 43 and 16 partition plates 44, the actual fourth blower 34 is made of an electrode material 10a. It is provided with tens to thousands of straightening vanes 43 and partition plates 44 depending on the dimensions in the lateral direction.

The accommodating member 45 is formed from a rectangular bottom wall 45a, a first side wall 45b erected from one end of the bottom wall 45a in the longitudinal direction to the thickness direction of the bottom wall 45a, and the other end of the bottom wall 45a in the longitudinal direction. It has a second side wall 45c erected in the thickness direction of the bottom wall 45a. The accommodating member 45 has a U shape when viewed from the lateral side of the bottom wall 45a. The first accommodation space S1 is partitioned by a bottom wall 45a, a first side wall 45b, and a second side wall 45c.

As shown in FIG. 5, the first side wall 45b has a plurality of pins 45d protruding from a surface facing the second side wall 45c. The plurality of pins 45d are arranged in the lateral direction of the bottom wall 45a. Further, the second side wall 45c is provided with a plurality of nozzle insertion holes 45h that penetrate the second side wall 45c in the thickness direction. The second side wall 45c of the present embodiment has six nozzle insertion holes 45h. The plurality of nozzle insertion holes 45h are arranged in the lateral direction of the bottom wall 45a.

The accommodating member 45 is arranged so that the longitudinal direction of the bottom wall 45a coincides with the transport direction and the lateral direction of the bottom wall 45a coincides with the width direction. The first side wall 45b and the second side wall 45c are erected from the bottom wall 45a toward the electrode material 10a. The second side wall 45c is located downstream of the first side wall 45b in the transport direction.

The plurality of straightening vanes 43 are arranged in the first accommodating space S1 at intervals in the lateral direction of the bottom wall 45a. That is, the plurality of straightening vanes 43 are arranged at intervals in the width direction. The plate thickness direction of each straightening vane 43 coincides with the width direction. The straightening vane 43 has a first surface 43a facing the bottom wall 45a of the accommodating member 45, and a second surface 43b which is a surface opposite to the first surface 43a. The second surface 43b is an opposing surface facing the electrode material 10a, and the first surface 43a is an anti-opposing surface which is a surface opposite to the facing surface. Further, the straightening vane 43 has a third surface 43c facing the first side wall 45b of the accommodating member 45 and a fourth surface 43d facing the second side wall 45c of the accommodating member 45. The fourth surface 43d is located downstream of the third surface 43c in the transport direction.

Each straightening vane 43 has a pin insertion hole 43e on the third surface 43c. The straightening vane 43 is assembled to the accommodating member 45 by inserting each pin 45d of the accommodating member 45 into each pin insertion hole 43e.

As shown in FIG. 4, each straightening vane 43 has a recess 46 recessed from the second surface 43b. The recess 46 connects the bottom surface 46a, the first inner surface 46b that connects the bottom surface 46a and the second surface 43b, and the second inner surface that connects the bottom surface 46a and the second surface 43b and faces the first inner surface 46b. It has a side surface 46c. The direction in which the first inner side surface 46b and the second inner side surface 46c face each other coincides with the transport direction, and the second inner side surface 46c is located on the downstream side of the first inner side surface 46b in the transport direction. By arranging a plurality of straightening vanes 43 so that the spaces partitioned by the recesses 46 of the straightening vanes 43 are arranged in the width direction, the second accommodating space S2 as an accommodating space in which the roll member 42 is accommodated is provided. It is partitioned.

As shown in FIG. 5, the roll member 42 is arranged in the second accommodation space S2 so that the axis L extends along the width direction. The air flow path 41a and the gap S3 partitioned by the straightening vanes 43 adjacent to each other in the width direction communicate with each other by a part of the plurality of communication passages 42h. Of both ends of the roll member 42 in the axial direction, one end located at the first end in the width direction is referred to as the first end 42a, and the other end located at the second end in the width direction is referred to as the second end 42b. do.

As shown in FIGS. 5 and 6, each straightening vane 43 is provided with a shaft insertion hole 43h that penetrates the straightening vane 43 in the plate thickness direction. The shaft insertion hole 43h has a rectangular shape when the straightening vane 43 is viewed from the plate thickness direction. The shaft insertion hole 43h is located between the third surface 43c and the recess 46 in the transport direction, and the bottom wall 45a of the accommodating member 45 sandwiches the pin insertion hole 43e in the direction orthogonal to both the transport direction and the width direction. It is located on the opposite side of.

The partition plate 44 has a rectangular first portion 44a and a second portion 44b extending from one end in the longitudinal direction of the first portion 44a in the lateral direction of the first portion 44a. The partition plate 44 has an L shape when viewed from the plate thickness direction. The partition plate 44 of this embodiment is made of silicone rubber.

As shown in FIGS. 4 and 5, the plurality of partition plates 44 are arranged in the first accommodation space S1 in the lateral direction of the bottom wall 45a so as to be located between the straightening plates 43. That is, the plurality of straightening vanes 43 and the plurality of partitioning plates 44 are alternately arranged in the width direction. The plate thickness direction of each partition plate 44 coincides with the width direction. The partition plate 44 is arranged so that the longitudinal direction of the first portion 44a coincides with the transport direction and the longitudinal direction of the second portion 44b coincides with the direction orthogonal to both the transport direction and the width direction. Further, the first portion 44a is located on the downstream side in the transport direction from both ends in the longitudinal direction, one end of which the second portion 44b is located is located on the opposite side of the second portion 44b. It is arranged like this. When the partition plate 44 is viewed from the plate thickness direction, one end surface of the first portion 44a in the lateral direction is continuous with the bottom surface 46a of the recess 46, and one end surface of the second portion 44b in the lateral direction is the recess 46. It is continuous with the second inner surface 46c.

The fourth blower device 34 of the present embodiment has a rod-shaped connecting member 47 for connecting a plurality of straightening vanes 43. The connecting member 47 of the present embodiment has a rectangular shape when viewed from the axial direction. The plurality of straightening vanes 43 are connected in the width direction by inserting the connecting member 47 into the shaft insertion hole 43h of each straightening vane 43. In the present embodiment, the outer peripheral surface of the connecting member 47 is fixed to the surface that partitions the shaft insertion hole 43h by an adhesive (not shown), so that the connecting member 47 is restricted from coming out of the shaft insertion hole 43h.

The plurality of straightening vanes 43 can be tilted in a direction orthogonal to the axis L of the roll member 42. Therefore, the plurality of straightening vanes 43 can take a non-tilted state along the direction orthogonal to the axis L of the roll member 42, or an inclined state inclined with respect to the direction orthogonal to the axis L of the roll member 42.

FIG. 7 illustrates a fourth blower device 34 when the plurality of straightening vanes 43 are in a non-tilted state. At this time, in each straightening vane 43, the first surface 43a and the second surface 43b are located at the same position in the width direction.

8 and 9 show a fourth blower device 34 when the plurality of straightening vanes 43 are in an inclined state. The plurality of straightening vanes 43 are inclined with respect to the direction orthogonal to the axis L of the roll member 42 by moving the connecting member 47 in the width direction.

As shown in FIG. 10, the fourth blower device 34 has a drive unit 70 that moves the connecting member 47 in the width direction. The drive unit 70 is, for example, an air cylinder. The drive unit 70 can move the connecting member 47 in the first direction from the first end to the second end in the width direction and the second direction from the second end to the first end in the width direction. .. The second orientation is the opposite of the first orientation.

As shown in FIG. 8, when the drive unit 70 moves the connecting member 47 in the first direction, the plurality of straightening vanes 43 are also moved in the first direction by being guided by the connecting member 47. At this time, since each straightening vane 43 is assembled to the accommodating member 45 by the pin 45d, it rotates about the pin 45d. As a result, the plurality of straightening vanes 43 are in a first inclined state in which the second surface 43b is inclined so as to be located on the second end side in the width direction with respect to the first surface 43a. The partition plate 44 is deformed as the straightening vane 43 is tilted.

As shown in FIG. 9, when the drive unit 70 moves the connecting member 47 in the second direction, the plurality of straightening vanes 43 are also moved in the second direction by being guided by the connecting member 47. At this time, since each straightening vane 43 is assembled to the accommodating member 45 by the pin 45d, it rotates about the pin 45d. As a result, the plurality of straightening vanes 43 are in a second inclined state in which the second surface 43b is inclined so as to be located on the first end side in the width direction with respect to the first surface 43a. The partition plate 44 is deformed as the straightening vane 43 is tilted.

As shown in FIGS. 4 and 5, the fourth blower device 34 has a nozzle unit 48. The nozzle unit 48 has a plurality of nozzle groups. In the present embodiment, the nozzle unit 48 has first to third nozzle groups 48a to 48c. Each nozzle group 48a to 48c is composed of nozzles 49 as a plurality of sub-blowers. In the present embodiment, each nozzle group 48a to 48c is composed of two nozzles 49.

The nozzle unit 48 is arranged on the downstream side of the main blower 41 in the transport direction. The first to third nozzle groups 48a to 48c are arranged side by side in this order in the first direction in the width direction. That is, the first nozzle group 48a is located on the first end side in the width direction, the third nozzle group 48c is located on the second end side in the width direction, and the second nozzle group 48b is located on the first end side in the width direction. It is located between the nozzle group 48a and the third nozzle group 48c.

Each nozzle 49 is inserted into each nozzle insertion hole 45h of the accommodating member 45, and is arranged in a gap S3 partitioned by a straightening vane 43 adjacent to each other in the width direction. In the present embodiment, each nozzle 49 is arranged every two with respect to a plurality of gaps S3 existing in the width direction. As shown by the broken line arrow in FIG. 6, each nozzle 49 sends air from between the straightening vanes 43 adjacent to each other in the width direction toward the active material mixture 120 upstream in the transport direction. In this embodiment, the air blown from the nozzle 49 is intermittently performed. "Blowing air from the nozzle 49 is performed intermittently" means that the blowing operation in which the nozzle 49 sends air and the non-blowing operation in which the nozzle 49 does not send air are alternately repeated.

As shown in FIG. 5, the second portion 44b of the partition plate 44 is located between the main blower portion 41 and the nozzle 49 in the transport direction. Therefore, the interference between the air sent from the main blower 41 toward the downstream in the transport direction and the air sent from the nozzle 49 toward the upstream in the transport direction is avoided by the second portion 44b.

As shown in FIG. 10, the fourth blower device 34 has an air supply section 50 that supplies air to the main blower section 41 and the nozzle unit 48.
The air supply unit 50 includes an air supply source 51, a main tank 52 for storing air supplied to the main blower unit 41, and a sub tank 53 for storing air supplied to the nozzle unit 48. The air supply source 51 is composed of, for example, an air compressor. The air supply source 51 and the main tank 52 are connected by a first connection pipe 54, and the air supply source 51 and the sub tank 53 are connected by a second connection pipe 55. A regulator 54a is provided in the middle of the first connection pipe 54, and the pressure of the air in the main tank 52 is adjusted by the regulator 54a. Similarly, a regulator 55a is provided in the middle of the second connection pipe 55, and the pressure of the air in the sub tank 53 is adjusted by the regulator 55a.

The air supply unit 50 is a second main pipe 56 that connects the main tank 52 and the first end portion 42a of the roll member 42, and a second main pipe 56 that connects the main tank 52 and the second end portion 42b of the roll member 42. It has a pipe 57.

A first main valve 56a is provided in the middle of the first main pipe 56. When the first main valve 56a is in the open state, the air in the main tank 52 is supplied to the air flow path 41a from the first end portion 42a of the roll member 42, and when the first main valve 56a is in the closed state, the roll member. Air is not supplied to the air flow path 41a from the first end portion 42a of 42.

Similarly, a second main valve 57a is provided in the middle of the second main pipe 57. When the second main valve 57a is in the open state, the air in the main tank 52 is supplied to the air flow path 41a from the second end 42b of the roll member 42, and when the second main valve 57a is in the closed state, the roll member. Air is not supplied to the air flow path 41a from the second end portion 42b of 42.

The air supply unit 50 includes a first sub-pipe 58 that connects the sub-tank 53 and the first nozzle group 48a, a second sub-pipe 59 that connects the sub-tank 53 and the second nozzle group 48b, and a sub-tank 53 and a third nozzle. It has a third sub-pipe 60 that connects to the group 48c.

A first sub valve 58a is provided in the middle of the first sub pipe 58. When the first sub valve 58a is in the open state, the air in the sub tank 53 is supplied to each nozzle 49 constituting the first nozzle group 48a, and when the first sub valve 58a is in the closed state, it constitutes the first nozzle group 48a. No air is supplied to each nozzle 49.

Similarly, a second sub valve 59a is provided in the middle of the second sub pipe 59. When the second sub valve 59a is in the open state, the air in the sub tank 53 is supplied to each nozzle 49 constituting the second nozzle group 48b, and when the second sub valve 59a is in the closed state, it constitutes the second nozzle group 48b. No air is supplied to each nozzle 49.

Similarly, a third sub valve 60a is provided in the middle of the third sub pipe 60. When the third sub-valve 60a is in the open state, the air in the sub-tank 53 is supplied to each nozzle 49 constituting the third nozzle group 48c, and when the third sub-valve 60a is in the closed state, it constitutes the third nozzle group 48c. No air is supplied to each nozzle 49.

The drying device 26 includes a first detection unit 61 and a second detection unit 62 for detecting the position of the end of the electrode material 10a in the lateral direction, and a control unit 63 for controlling the air supply unit 50 and the drive unit 70. The control unit 63 is connected to the first detection unit 61 and the second detection unit 62.

As shown in FIG. 3, the first detection unit 61 and the second detection unit 62 are arranged above the electrode material 10a. The first detection unit 61 is arranged on the upstream side of the main blower unit 41 in the transport direction. The second detection unit 62 is arranged on the downstream side of the main blower unit 41 and on the upstream side of the nozzle unit 48 in the transport direction. The first detection unit 61 and the second detection unit 62 of the present embodiment each detect the position of the end 10e located on the first end side in the width direction of both ends of the electrode material 10a in the lateral direction. Each of the first detection unit 61 and the second detection unit 62 outputs the position of the detected end 10e of the electrode material 10a to the control unit 63.

The control unit 63 stores the position of the end 10e of the electrode material 10a in a non-meandering state. The control unit 63 compares the position of the end 10e of the electrode material 10a input from the first detection unit 61 and the second detection unit 62 with the position of the end 10e of the electrode material 10a in a non-meandering state. , The amount of meandering and the direction of meandering of the electrode material 10a are grasped.

Specifically, the control unit 63 first meanders the difference between the position of the end 10e of the electrode material 10a input from the first detection unit 61 and the position of the end 10e of the electrode material 10a in a non-meandering state. Grasp as a quantity. The control unit 63 grasps the difference between the position of the end 10e of the electrode material 10a input from the second detection unit 62 and the position of the end 10e of the electrode material 10a in a non-meandering state as the second meandering amount.

Further, when the end 10e of the electrode material 10a input from the first detection unit 61 is located on the first end side in the width direction with respect to the end 10e of the electrode material 10a in a non-meandering state, the control unit 63 Knows that the meandering direction of the electrode material 10a is the second direction from the second end to the first end in the width direction. On the other hand, when the end 10e of the electrode material 10a input from the first detection unit 61 is located on the second end side in the width direction with respect to the end 10e of the electrode material 10a in a non-meandering state, the control unit 63 Knows that the meandering direction of the electrode material 10a is the first direction from the first end to the second end in the width direction.

The control unit 63 controls the first and second main valves 56a and 57a. The control unit 63 can individually control the first main valve 56a and the second main valve 57a. Therefore, the first air supply amount supplied from the first end portion 42a of the roll member 42 to the air flow path 41a and the second air supply amount supplied from the second end portion 42b of the roll member 42 to the air flow path 41a. The air supply amount can be set individually. In the present embodiment, the control unit 63 opens the first and second main valves 56a and 57a and the first and second main valves 56a, so that the air from the main air blowing unit 41 is intermittently blown. The closing operation of 57a is alternately performed. Further, the control unit 63 matches the timing of the opening operation of the first main valve 56a and the timing of the opening operation of the second main valve 57a, and the timing of the closing operation of the first main valve 56a and the timing of the second main valve 57a. By matching the timing of the closing operation, the first air supply amount and the second air supply amount are always made the same amount.

The control unit 63 controls the drive unit 70 based on the first meandering amount and the meandering direction of the electrode material 10a. The control unit 63 compares the first meandering amount with the predetermined first determination meandering amount. When the first meandering amount is equal to or less than the first determination meandering amount, the control unit 63 does not operate the drive unit 70 and puts the plurality of straightening vanes 43 in a non-tilted state. On the other hand, when the first meandering amount exceeds the first determination meandering amount, the control unit 63 operates the drive unit 70 to tilt the plurality of straightening vanes 43.

Specifically, when the first meandering amount exceeds the first determination meandering amount and the meandering direction is the second direction, the control unit 63 drives the connecting member 47 to move in the first direction. By controlling the unit 70, the plurality of straightening vanes 43 are brought into the first inclined state shown in FIG. When the first meandering amount exceeds the meandering amount for the first determination and the meandering direction of the electrode material 10a is the first direction, the control unit 63 causes the connecting member 47 to move in the second direction. By controlling the drive unit 70, the plurality of straightening vanes 43 are brought into the second inclined state shown in FIG.

The control unit 63 controls the first to third sub-valves 58a, 59a, 60a based on the second meandering amount and the meandering direction. The control unit 63 can individually control the first to third subvalves 58a, 59a, 60a. The control unit 63 compares the second meandering amount with the predetermined second determination meandering amount. The second determination meandering amount is set to a value smaller than the first determination meandering amount.

When the second meandering amount is equal to or less than the second determination meandering amount, the control unit 63 opens the sub-valves 58a, 59a, 60a so that the air from each nozzle 49 is blown intermittently. The closing operations of the sub-valves 58a, 59a, and 60a are alternately performed. Further, the control unit 63 adjusts the timing of the opening operation of each of the sub-valves 58a, 59a, 60a and the timing of the closing operation of each of the sub-valves 58a, 59a, 60a, so that the amount of air blown from each nozzle 49 is the same. To.

On the other hand, when the second meandering amount exceeds the meandering amount for the second determination, the sub-valves 58a, 59a, and 60a are alternately opened and closed so that the air from each nozzle 49 is intermittently blown. , In order to make the amount of air blown from each nozzle 49 different, the opening times of the sub-valves 58a, 59a, 60a are made different.

Specifically, when the second meandering amount exceeds the second determination meandering amount and the meandering direction is the second direction, the control unit 63 sets the opening time of the first subvalve 58a to the second subvalve 59a and It should be longer than the opening time of the third sub-valve 60a. As a result, as shown by the arrows in FIG. 11, the amount of air blown from the nozzles 49 constituting the first nozzle group 48a is larger than the amount of air blown from the nozzles 49 forming the second nozzle group 48b and the third nozzle group 48c. More.

When the second meandering amount exceeds the second determination meandering amount and the meandering direction is the first direction, the control unit 63 sets the opening time of the third subvalve 60a to the first subvalve 58a and the first subvalve 58a. 2 Make it longer than the opening time of the sub valve 59a. As a result, as shown by the arrows in FIG. 12, the amount of air blown from the nozzles 49 constituting the third nozzle group 48c is larger than the amount of air blown from the nozzles 49 forming the first nozzle group 48a and the second nozzle group 48b. More.

The operation of the first embodiment will be described.
In the drying device 26, turbulence is generated in the drying furnace 30 due to the air sent from the first to third blowers 31 to 33 interfering with each other in the width direction, and the electrode material 10a is affected by the turbulence. May meander so as to swing in the width direction. On the other hand, the fourth blower device 34 has a plurality of straightening vanes 43 arranged in the width direction as a configuration for correcting the meandering of the electrode material 10a. The roll member 42 of the main blower portion 41 is arranged in the second accommodating space S2 partitioned by the recesses 46 of the plurality of straightening vanes 43 arranged in the width direction. The air flow path 41a and the gap S3 partitioned by the straightening vanes 43 adjacent to each other in the width direction communicate with each other by the communication passage 42h of the main blower portion 41. As a result, the air sent from the roll member 42 is rectified by flowing between the rectifying plates 43 adjacent to each other in the width direction, so that the air is less likely to interfere in the width direction and the turbulent flow in the drying furnace 30 is generated. It is suppressed. As a result, the meandering of the electrode material 10a in the lateral direction is corrected.

Further, in the present embodiment, the plurality of straightening vanes 43 can be inclined with respect to the direction orthogonal to the axis L of the roll member 42. By inclining the plurality of straightening vanes 43 with respect to the direction orthogonal to the axis L of the roll member 42, the direction of the air flow between the straightening vanes 43 adjacent to each other in the width direction is changed.

Specifically, when the electrode material 10a meanders in the first direction in the width direction, the plurality of straightening vanes 43 are in the second inclined state, so that air flows in the second direction. Therefore, the electrode material 10a meandering in the first direction is pressed in the second direction by the air. On the other hand, when the electrode material 10a meanders in the second direction in the width direction, the plurality of straightening vanes 43 are in the first inclined state, so that air flows in the first direction. Therefore, the electrode material 10a meandering in the second direction is pressed in the first direction by the air. In this way, by inclining the plurality of straightening vanes 43 according to the meandering direction of the electrode material 10a, the meandering of the electrode material 10a in the lateral direction is further corrected.

The meandering amount of the electrode material 10a decreases due to the rectification of air by the straightening vane 43 and the change of the air direction due to the inclination of the straightening vane 43, but the fourth blower device 34 of the present embodiment has the meandering amount of the electrode material 10a. A nozzle unit 48 is provided as a configuration for further reducing the number of nozzles. The plurality of nozzles 49 constituting the nozzle unit 48 are arranged in the width direction, and the amount of air blown from each nozzle 49 can be set for each of the nozzle groups 48a to 48c. By making the amount of air blown from the nozzle 49 located on the first end side in the width direction different from the amount of air blown from the nozzle 49 located on the second end side in the width direction, the air is sent from the nozzle 49 to the electrode material 10a. The amount of air can be different in the width direction.

Specifically, when the electrode material 10a meanders in the first direction in the width direction, the amount of air blown from the nozzles 49 constituting the third nozzle group 48c located on the second end side in the width direction is , It is set to be larger than the amount of air blown from the nozzles 49 constituting the first nozzle group 48a located on the first end side in the width direction. Therefore, the amount of air sent from the nozzle 49 to the electrode material 10a is larger on the second end side than on the first end side in the width direction. Therefore, the electrode material 10a meandering in the first direction is pressed in the second direction by the air.

On the other hand, when the electrode material 10a meanders in the second direction in the width direction, the amount of air blown from the nozzles 49 constituting the first nozzle group 48a located on the first end side in the width direction is in the width direction. It is set to be larger than the amount of air blown from the nozzles 49 constituting the third nozzle group 48c located on the second end side of the above. Therefore, the amount of air sent from the nozzle 49 to the electrode material 10a is larger on the first end side than on the second end side in the width direction. Therefore, the electrode material 10a meandering in the second direction is pressed in the first direction by the air. In this way, by setting the amount of air blown from the nozzle 49 according to the meandering direction of the electrode material 10a, the meandering of the electrode material 10a in the lateral direction is further corrected.

The effect of the first embodiment will be described.
(1-1) The air supplied by the air supply unit 50 to the air passage 41a inside the roll member 42 of the main blower 41 flows out of the roll member 42 from the communication passage 42h. The air flow path 41a and the gap S3 partitioned by the straightening vanes 43 adjacent to each other in the width direction communicate with each other by the communication passage 42h. As a result, the air sent from the roll member 42 of the main blower 41 flows between the rectifying plates 43 adjacent to each other in the width direction and is rectified. Therefore, the air is less likely to interfere in the width direction, and the drying furnace 30 The turbulence inside is suppressed. Therefore, the meandering of the electrode material 10a in the lateral direction can be corrected.

(1-2) A plurality of straightening vanes 43 are inclined in a direction orthogonal to the axis L of the roll member 42 according to the meandering direction of the electrode material 10a, so that between the straightening vanes 43 adjacent to each other in the width direction. The direction of the air flow is changed. Therefore, the meandering of the electrode material 10a in the lateral direction can be further corrected.

In this case, in order to correct the meandering of the electrode material 10a by physically inclining the straightening vane 43 to change the direction of the air flow, the first air supply amount and the first air supply amount and the second are as in the second embodiment. By making the air supply amount of No. 2 different, it is easier to correct the meandering of the electrode material 10a as compared with the case of correcting the meandering of the electrode material 10a.

(1-3) Depending on the meandering direction of the electrode material 10a, the amount of air blown from the nozzle 49 located on the first end side in the width direction and the amount of air blown from the nozzle 49 located on the second end side in the width direction. By making the amount different, the amount of air sent from the nozzle 49 to the electrode material 10a can be made different in the width direction. Therefore, the meandering of the electrode material 10a in the lateral direction can be further corrected.

(1-4) The control unit 63 controls the first and second main valves 56a and 57a so that the air from the main air blowing unit 41 is intermittently blown. Therefore, the amount of air consumed is reduced as compared with the case where the air from the main air blowing unit 41 is continuously blown. Therefore, the cost required for the operation of the fourth blower device 34 can be reduced.

(1-5) The control unit 63 controls the first to third sub-valves 58a, 59a, 60a so that the air blown from the nozzle 49 is intermittently performed. Therefore, the amount of air consumed is reduced as compared with the case where the air is continuously blown from the nozzle 49. Therefore, the cost required for the operation of the fourth blower device 34 can be reduced.

(1-6) By controlling one of the sub valves 58a, 59a, 60a, the amount of air blown from the two nozzles 49 can be changed. In this case, by controlling one sub-valve, the number of sub-valves can be reduced as compared with the case where the amount of air blown from one nozzle 49 is changed.

(Second Embodiment)
Hereinafter, a second embodiment in which the electrode material drying apparatus is embodied will be described with reference to FIGS. 13 and 14. Since the configurations other than the fourth blower device 34 are the same as those in the first embodiment, the description thereof will be omitted.

As shown in FIGS. 13 and 14, the fourth blower device 34 of the second embodiment includes a main blower unit 41, a plurality of straightening vanes 43, a plurality of partition plates 44, an accommodating member 45, and a nozzle. It includes a unit 48 and an air supply unit 50. The nozzle unit 48 and the air supply unit 50 are not shown. In the second embodiment, the plurality of straightening vanes 43 are fixed to the accommodating member 45 so as to be in a non-tilted state at all times. Therefore, the fourth blower device 34 does not include a connecting member 47 for connecting the plurality of straightening vanes 43 and a driving unit 70 for moving the connecting member 47 in the width direction.

Similar to the first embodiment, the control unit 63 can individually control the opening and closing of the first main valve 56a and the opening and closing of the second main valve 57a. That is, the first air supply amount supplied from the first end portion 42a of the roll member 42 to the air flow path 41a and the second air supplied from the second end portion 42b of the roll member 42 to the air flow path 41a. The supply amount can be set individually.

The control unit 63 controls the first and second main valves 56a and 57a based on the first meandering amount and the meandering direction of the electrode material 10a. The control unit 63 compares the first meandering amount with the predetermined first determination meandering amount. When the first meandering amount is equal to or less than the first determination meandering amount, the control unit 63 sets the first air supply amount and the second air supply amount to the same supply amount. On the other hand, when the first meandering amount exceeds the first determination meandering amount, the control unit 63 controls the first main valve 56a and the second main valve 57a differently to supply the first air. And the second air supply amount are different.

Specifically, when the first meandering amount exceeds the first determination meandering amount and the meandering direction is the first direction, the control unit 63 sets the opening time of the second main valve 57a as the first main. Make it longer than the opening time of the valve 56a. As a result, as shown by the arrow in FIG. 13, the second air supply amount becomes larger than the first air supply amount. When the first meandering amount exceeds the meandering amount for the first determination and the meandering direction is the second direction, the control unit 63 sets the opening time of the first main valve 56a to the opening time of the second main valve 57a. Longer than. As a result, as shown by the arrow in FIG. 14, the first air supply amount becomes larger than the second air supply amount.

The operation of the second embodiment will be described. The action of rectifying the air by the rectifying plate 43 and the action of correcting the meandering of the electrode material 10a by changing the amount of air blown from the nozzle 49 according to the meandering direction are the same as those in the first embodiment. Therefore, the description thereof will be omitted.

In the second embodiment, the control unit 63 controls the first and second main valves 56a and 57a based on the first meandering amount and the meandering direction of the electrode material 10a to obtain the first air supply amount and the second air supply amount. Control the amount of air supplied.

As shown in FIG. 13, when the first meandering amount exceeds the first determination meandering amount and the electrode material 10a meanders in the first direction in the width direction, the control unit 63 supplies the second air. The first and second main valves 56a and 57a are controlled so that the amount is larger than the first air supply amount. As a result, the amount of air sent from the main blower portion 41 to the electrode material 10a is larger on the second end side in the width direction than on the first end side. Therefore, the electrode material 10a meandering in the first direction is pressed in the second direction by the air sent from the main blower portion 41.

As shown in FIG. 14, when the first meandering amount exceeds the first determination meandering amount and the electrode material 10a meanders in the second direction in the width direction, the control unit 63 supplies the first air. The first and second main valves 56a and 57a are controlled so that the amount is larger than the amount of the second air supply. As a result, the amount of air sent from the main blower portion 41 to the electrode material 10a is larger on the first end side in the width direction than on the second end side. Therefore, the electrode material 10a meandering in the second direction is pressed in the first direction by the air sent from the main blower portion 41. In this way, by setting the first air supply amount and the second air supply amount according to the meandering direction of the electrode material 10a, the meandering of the electrode material 10a in the lateral direction is further corrected.

The effect of the second embodiment will be described. In the second embodiment, in addition to the effects (1-1), (1-3) to (1-6) of the first embodiment, the following effects can be obtained.
(2-1) By making the first air supply amount and the second air supply amount different according to the meandering direction of the electrode material 10a, the amount of air sent from the main blower 41 to the electrode material 10a is widened. Can be different in direction. Therefore, the meandering of the electrode material 10a in the lateral direction can be further corrected.

The above embodiment can be modified and implemented as follows. The above-described embodiments and modifications can be implemented in combination with each other within a technically consistent range.
○ The electrode sheet 10 may have an active material layer on only one side of the metal foil 11. In this case, the electrode material 10a has a metal foil 11 and an active material mixture 120 coated on one surface of the metal foil 11. Further, for example, the electrode material 10a is conveyed in the drying furnace 30 so that the surface coated with the active material mixture 120 is on the upper surface, and the second blower 32 is combined with the fourth blower 34 of the above embodiment. If the same configuration is used, the third blower 33 and the fourth blower 34 may be omitted, and a support roll for supporting the electrode material 10a from below may be provided instead.

○ The base material is not limited to the metal foil 11, and may be, for example, a woven or net-like current collector.
○ The slurry is not limited to the active material mixture 120, and may be, for example, a ceramic slurry or an adhesive.

○ The manufacturing method of the electrode sheet may be changed as appropriate. For example, in the method of manufacturing the electrode sheet, the first coating step of applying the active material mixture 120 to the first surface 11a of the metal foil 11 and the drying of the active material mixture 120 coated on the first surface 11a are performed. After the first drying step, the second coating step of applying the active material mixture 120 to the second surface 11b of the metal foil 11, and the active material combination applied to the second surface 11b. It may have a second drying step of drying the agent 120. In this case, the drying device 26 of the above embodiment can be used for each of the first drying step and the second drying step.

○ In one drying furnace 30, both the first drying region A1 and the second drying region A2 may not be provided. For example, the drying device 26 may have a first drying furnace having a first drying region A1 and a second drying furnace having a second drying region A2 separately. The first drying furnace and the second drying furnace may each be composed of a plurality of furnaces.

○ When the drying device 26 has a first drying furnace having the first drying region A1 and a second drying furnace having the second drying region A2 separately, the first detection unit 61 may use the first detection unit 61. For example, it may be arranged between the first drying furnace and the second drying furnace.

○ The number of the first blower units 31 may be changed as appropriate.
○ The number of the second blower 32 may be changed as appropriate.
○ The number of the third blower 33 may be changed as appropriate.

○ The number of the fourth blower 34 may be changed as appropriate.
○ In the first embodiment, if the air sent from the main blower 41 is rectified by the plurality of straightening vanes 43, the plurality of straightening vanes 43 are oriented in a direction orthogonal to the axis L of the roll member 42. It does not have to be tilted.

○ In the second embodiment, if the air sent from the main blower 41 is rectified by a plurality of straightening vanes 43, the first air supply amount and the second air supply amount are always the same amount. It may be set.

○ The configuration of the first embodiment and the configuration of the second embodiment may be combined. That is, the plurality of straightening vanes 43 are inclined with respect to the direction orthogonal to the axis L of the roll member 42 according to the meandering direction of the electrode material 10a, and the first air supply amount and the second air supply amount. It may be set to a different amount from.

○ Each of the first blower devices 31 may have the same configuration as the fourth blower device 34. However, since the fluidity of the active material mixture 120 is high in the first dry region A1, if the straightening vane 43 is tilted or the first air supply amount and the second air supply amount are different, the active material combination When the agent 120 is flowed by air, the coating thickness may be biased in the width direction. Therefore, after the active material mixture 120 is dried until the fluidity becomes low, the current plate 43 is tilted, or the first air supply amount and the second air supply amount are different from each other to make the electrode material. It is preferable to correct the meandering of 10a.

○ The second blower 32 may have the same configuration as the fourth blower 34.
○ Each third blower 33 may have the same configuration as the fourth blower 34. However, since the fluidity of the active material mixture 120 is high in the first dry region A1, if the straightening vane 43 is tilted or the first air supply amount and the second air supply amount are different, the active material combination When the agent 120 is flowed by air, the coating thickness may be biased in the width direction. Therefore, after the active material mixture 120 is dried until the fluidity becomes low, the current plate 43 is tilted, or the first air supply amount and the second air supply amount are different from each other to make the electrode material. It is preferable to correct the meandering of 10a.

○ In the first and second embodiments, the fourth blower device 34 does not have to include the nozzle unit 48. In this case, the partition plate 44 can be omitted because the air sent from the main blower 41 toward the downstream in the transport direction and the air sent from the nozzle 49 toward the upstream in the transport direction do not interfere with each other. Further, among the air supply units 50, the sub tank 53, the second connection pipe 55, the first to third sub pipes 58 to 60, the first to third sub valves 58a, 59a, 60a, and the second detection unit 62 are also unnecessary. Become.

○ The number of nozzle groups included in the nozzle unit 48 may be changed as appropriate.
○ The number of nozzles 49 constituting the nozzle group may be changed as appropriate.
○ In the nozzle unit 48, each nozzle 49 and the sub tank 53 may be connected one-to-one by a sub pipe, and a sub valve may be provided in each sub pipe.

○ In the first embodiment, the control unit 63 may always keep the first and second main valves 56a and 57a open so that air is continuously sent from the main blower unit 41.
○ In the second embodiment, the control unit 63 may always keep the first and second main valves 56a and 57a open so that air is continuously sent from the main blower unit 41. In this case, the control unit 63 makes the opening degree of the first main valve 56a different from the opening degree of the second main valve 57a so that the first air supply amount and the second air supply amount are different. Can be done.

○ In the first and second embodiments, the control unit 63 may always keep the first to third sub-valves 58a, 59a, 60a open so that air is continuously sent from the nozzle 49. In this case, the control unit 63 can make the amount of air blown from the nozzle 49 different for each of the nozzle groups 48a to 48c by making the opening degrees of the first to third sub-valves 58a, 59a, 60a different.

10a ... Electrode material, 11 ... Metal leaf as a base material, 26 ... Electrode material drying device, 30 ... Drying furnace, 34 ... Fourth blower as a blower, 41 ... Main blower, 42 ... Roll member, 42h ... communication passage, 43 ... rectifying plate, 43a ... first surface as anti-opposing surface, 43b ... second surface as facing surface, 44 ... partition plate, 46 ... recess, 49 ... nozzle as sub-blower, 50 ... Air supply unit, 120 ... active material mixture as a slurry, L ... axis, S ... second storage space as a storage space.

Claims (4)

A drying furnace in which an electrode material having a long strip-shaped base material and a slurry coated on the base material is internally conveyed in the longitudinal direction, and a drying furnace.
An air blower that is placed inside the drying oven and blows air toward the slurry.
It is a drying device for electrode materials equipped with
The blower is
A main blower having a tubular roll member and a communication passage that communicates the inside and outside of the roll member, and
An air supply unit that supplies air into the roll member from both sides in the axial direction of the roll member,
A plurality of straightening vanes, which are arranged at intervals in the width direction, which is the direction along the lateral direction of the electrode material, and have recesses recessed from the facing surface facing the electrode material.
Have,
A device for drying an electrode material, wherein the roll member is arranged in a storage space partitioned by a plurality of the recesses arranged in the width direction in a state where an axis extends along the width direction. The plurality of straightening vanes can be inclined with respect to a direction orthogonal to the axis of the roll member.
When the electrode material meanders in the first direction from the first end in the width direction toward the second end located on the side opposite to the first end, the facing surface is referred to as the facing surface. Inclined so as to be located on the first end side in the width direction with respect to the opposite surface, which is the opposite surface.
When the electrode material meanders in a second direction opposite to the first direction in the width direction, the facing surface is the second in the width direction with respect to the anti-opposing surface. The electrode material drying apparatus according to claim 1, which is inclined so as to be located on the end side. The first air supply amount supplied into the roll member from the first end portion of the roll member located at the first end in the width direction is located on the opposite side of the first end in the width direction. The second air supply amount supplied into the roll member from the second end of the roll member located at the second end can be set individually.
When the electrode material meanders in the first direction from the first end to the second end in the width direction, the second air supply amount is larger than the first air supply amount. Many are set,
When the electrode material meanders in a second direction opposite to the first direction, the first air supply amount is set to be larger than the second air supply amount. The electrode material drying apparatus according to claim 1 or 2. The blower is
A plurality of sub-blowers that are arranged on the downstream side of the main blower in the transport direction of the electrode material and blow air from between the straightening vanes adjacent to each other in the width direction toward the slurry and upstream in the transport direction. When,
A plurality of partition plates arranged between the straightening vanes in the width direction and located between the main air blower and the sub air blower in the transport direction.
Have,
The amount of air blown from the sub air blower can be set individually.
When the electrode material meanders in the first direction from the first end in the width direction toward the second end located on the side opposite to the first end, the second end side in the width direction The amount of air blown from the sub-blower located in is set to be larger than the amount of air blown from the sub-blower located on the first end side in the width direction.
When the electrode material is meandering in a second direction opposite to the first direction, the amount of air blown from the sub-blower located on the first end side in the width direction is The electrode material drying device according to any one of claims 1 to 3, wherein the amount of air blown from the sub-blower located on the second end side in the width direction is set to be larger than the amount of air blown from the sub-blower.

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