JP2021114440A - Drying apparatus of electrode material - Google Patents

Abstract

To provide a drying apparatus of an electrode material, capable of correcting a meander in a short direction of the electrode material.SOLUTION: A drying apparatus of an electrode material, comprises: a dry furnace in which an electrode material 10a is transmitted in a longer direction; a first blow part and a second blow part which transmit the wind at a first temperature toward an active material mixture 120 of the electrode material 10a; and a third blow part and a fourth blow part 34 which transmit the wind at a second temperature higher than the first temperature toward the active material mixture 120. The drying apparatus includes: a first dry region where the active material mixture 120 is dried by a blow from the first and second blow parts; and a second dry region where the active material mixture 120 is dried by the blow from the third blow part and the fourth blow part 34. The fourth blow part 34 is provided with a blow amount adjustment mechanism adjusting a blow amount so that an end side blow amount as a blow amount directed to both end parts in a short direction of the electrode material 10a becomes larger than a center blow amount as a blow amount directed to a center part in the short direction of the electrode material 10a.SELECTED DRAWING: Figure 4

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 plurality of blowers arranged in the drying furnace in the conveying direction of the electrode material and blowing 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 wind sent from the blower unit 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 first main blower, which is arranged inside the drying furnace and blows air at a first temperature toward the slurry, and a downstream side of the drying furnace in the transport direction of the electrode material from the first main blower. A second main blower, which is arranged on the side and blows air having a second temperature higher than the first temperature toward the slurry, is provided, and the slurry is dried by blowing air from the first main blower. The slurry has a first dry region and a second dry region in which the slurry is dried by blowing air from the second main blower, and the second dry region includes both ends of the electrode material in the lateral direction. An air volume adjusting mechanism is provided to adjust the air volume so that the end-side air flow, which is the directed air volume, is larger than the central air flow, which is the air flow toward the central portion in the lateral direction of the electrode material. The gist is that there is.

According to this, even if the electrode material meanders in the first direction from the first end to the second end in the lateral direction, the end located at the second end in the lateral direction of the electrode material by the air volume adjusting mechanism. Since the amount of air blown toward the portion is larger than the amount of air blown toward the central portion in the lateral direction of the electrode material, the electrode material is pressed in the second direction opposite to the first direction. .. Further, even if the electrode material meanders in the second direction in the lateral direction, the amount of air blown toward the end located at the first end in the lateral direction of the electrode material is short due to the air volume adjusting mechanism. The electrode material is pressed in the first direction because it is larger than the amount of air blown toward the central portion in the manual direction. Therefore, it is possible to correct the meandering of the electrode material in the lateral direction. Since the slurry is dried to a state of low fluidity in the first drying region, the slurry is flowed and biased in the second drying region even if the amount of air blown toward the electrode material is different in the short direction. You can avoid that.

Further, with respect to the electrode material drying device, it is preferable that the air volume adjusting mechanism is provided in the second main blower portion.
According to this, as compared with the case where the air volume adjusting mechanism is provided separately from the second main blower portion, it is possible to suppress the increase in size of the drying device in the lateral direction of the electrode material.

Further, regarding the drying device for the electrode material, the second main blower unit communicates the inside and outside of the cylindrical rotary roll body whose axis extends in the lateral direction of the electrode material, and the inside and outside of the rotary roll body, and the rotary roll. The rotary roll body has a rotary roll having a plurality of first communication holes arranged in the axial direction and the circumferential direction of the main body, and a gas supply unit for supplying gas into the rotary roll main body, and the rotary roll main body is the electrode. It has a pair of end side portions facing both ends in the lateral direction of the material and a central portion facing the central portion in the lateral direction of the electrode material, and the air volume adjusting mechanism is provided at the end side portions. It is preferable that the diameter of the first communication hole formed is larger than the diameter of the first communication hole provided in the central portion.

According to this, the gas supplied from the inside of the rotating roll body by the gas supply unit flows out to the outside of the rotating roll body through the first communication hole, so that the air from the rotating roll is blown. The amount of air blown from the end side of the rotating roll body corresponds to the amount of air blown from the end side, and the amount of air blown from the center part of the rotating roll body corresponds to the amount of air blown from the center. Since the diameter of the first communication hole provided in the end side portion is larger than that of the first communication hole provided in the central portion, the end side air flow amount is larger than the central air flow amount. In this case, since the air volume adjusting mechanism can be configured only by changing the diameter of the first communication hole, it is possible to prevent the configuration of the second main air blowing section from becoming complicated.

Further, regarding the drying device for the electrode material, the second main blower unit communicates the inside and outside of the cylindrical rotary roll body whose axis extends in the lateral direction of the electrode material, and the inside and outside of the rotary roll body, and the rotary roll. The rotary roll body has a rotary roll having a plurality of first communication holes arranged in the axial direction and the circumferential direction of the main body, and a gas supply unit for supplying gas into the rotary roll main body, and the rotary roll main body is the electrode. It has a pair of end side portions facing both ends in the lateral direction of the material and a central portion facing the central portion in the lateral direction of the electrode material, and the air volume adjusting mechanism is provided at the end side portions. It is preferable that the number of the first communication holes formed is larger than the number of the first communication holes provided in the central portion.

According to this, the gas supplied from the inside of the rotating roll body by the gas supply unit flows out to the outside of the rotating roll body through the first communication hole, so that the air from the rotating roll is blown. The amount of air blown from the end side of the rotating roll body corresponds to the amount of air blown from the end side, and the amount of air blown from the center part of the rotating roll body corresponds to the amount of air blown from the center. Since the number of the first communication holes provided in the end side portion is larger than the number of the first communication holes provided in the central portion, the end side air flow amount is larger than the central air flow amount. In this case, since the air volume adjusting mechanism can be configured only by changing the number of the first communication holes, it is possible to prevent the configuration of the second main air blowing section from becoming complicated.

Further, regarding the electrode material drying device, the second main blower portion is arranged inside the rotating roll so that the axis extends in the lateral direction of the electrode material, and the gas is internally provided by the gas supply portion. A tubular fixed roll body to which the gas is supplied, and a fixed roll having a plurality of second communication holes arranged in the axial direction and the circumferential direction of the fixed roll body while communicating the inside and outside of the fixed roll body, and the fixing. It is preferable to have a high frequency power supply that applies a high frequency current to the roll body.

According to this, the gas supplied to the inside of the fixed roll body by the gas supply unit flows to the inside of the rotating roll body through the second communication hole and flows out to the outside of the rotating roll body through the first communication hole. By doing so, the air is blown from the rotating roll. When the high frequency power supply applies a high frequency current to the fixed roll body, the rotating roll body is induced and heated. Therefore, the air sent from the rotating roll to the electrode material is warmed. The warm air and the radiant heat from the rotating roll body promote the drying of the slurry. Therefore, the slurry can be dried efficiently.

Further, with respect to the electrode material drying device, the second main blower has a receiving member arranged on the opposite side of the rotating roll from the electrode material and a driving unit for driving the receiving member. However, the receiving member has a recess that is recessed in a direction away from the electrode material, and when the electrode material is meandering in the first direction from the first end to the second end in the lateral direction, the recess. The distance from the bottom surface of the rotating roll body to the rotating roll body is shorter at the second end in the lateral direction than at the first end, and the electrode material is in the direction opposite to the first direction. When meandering in the direction, the distance from the bottom surface of the recess to the rotating roll body is preferably shorter at the first end in the lateral direction than at the second end.

When the receiving member is not arranged on the side opposite to the electrode material across the rotating roll, a part of the wind sent from the rotating roll flows in the direction away from the electrode material. On the other hand, when the receiving member is arranged on the opposite side of the rotating roll from the electrode material, the wind flowing in the direction away from the electrode material collides with the recess and then heads toward the electrode material by the recess. Change the direction of flow. As a result, the air blown from the rotating roll can be effectively used for drying the slurry.

Further, the shorter the distance from the bottom surface of the concave portion to the main body of the rotating roll, the larger the amount of gas that collides with the concave portion and bounces off after being sent from the rotating roll, so that the amount of air blown from the rotating roll to the electrode material is large. Become. Therefore, when the electrode material meanders in the first direction, the amount of air blown from the rotating roll toward the electrode material is larger at the second end in the lateral direction than at the first end. Therefore, the electrode material meandering in the first direction is pressed in the second direction. Further, when the electrode material meanders in the second direction, the amount of air blown from the rotating roll to the electrode material is larger at the first end in the lateral direction than at the second end. Therefore, the electrode material meandering in the second direction is pressed in the first direction. As a result, the meandering of the electrode material in the lateral direction can be further corrected.

Further, regarding the electrode material drying device, the second main blower portion includes a box-shaped main body portion to which gas is supplied to the inside, a partition wall provided inside the main body portion, and the inside and outside of the main body portion. The main body has a pair of end-side portions facing both ends of the electrode material in the lateral direction and a central portion of the electrode material in the lateral direction. The plurality of communication holes having a central portion include an end-side communication hole provided in the end-side portion and a central communication hole provided in the central portion, and the inside of the main body portion is formed by the partition wall. It is divided into an end-side space that communicates with the outside of the main body by the end-side communication hole and a central space that communicates with the outside of the main body by the central communication hole, and the amount of gas supplied to the end-side space is supplied to the end-side. When the amount of gas supplied to the central space is defined as the central supply amount, in the air volume adjusting mechanism, the amount of air blown from the end-side communication hole toward the electrode material is increased from the central communication hole to the electrode material. It is preferable that it is composed of a control unit that sets the end side supply amount and the central supply amount so as to be larger than the directed air flow amount.

According to this, the amount of air blown from the end communication hole to the electrode material corresponds to the amount of air blown to the end side, and the amount of air blown from the central communication hole to the electrode material corresponds to the amount of air blown to the electrode material. Is greater than the central air flow. In this case, the inside of the box-shaped main body is partitioned by the partition wall, and the air volume is adjusted only by setting the end side supply amount and the center supply amount so that the end side air volume is larger than the center air volume by the control unit. Since the mechanism can be configured, it is possible to prevent the configuration of the second main blower unit from becoming complicated.

Further, regarding the electrode material drying device, the air volume adjusting mechanism is arranged on both sides of the electrode material in the lateral direction in the second drying region, and blows air toward both ends of the electrode material in the lateral direction. It is preferably composed of a pair of sub-blowers.

According to this, in addition to the air sent from the second main air blower, the air sent from the pair of sub air blowers also hits both ends of the electrode material in the lateral direction. More than. In this case, the air volume adjusting mechanism can be easily configured only by providing a pair of sub-blowers on both sides of the electrode material in the lateral direction.

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 drying apparatus of 1st Embodiment. The side view of the 4th blower part. FIG. 4 is a sectional view taken along line 5-5 in FIG. FIG. 6-6 is a cross-sectional view taken along the line 6-6 in FIG. The side view of the 4th blower part. FIG. 3 is a cross-sectional view of a third blower portion of the second embodiment. FIG. 3 is a cross-sectional view of a third blower portion of the second embodiment. FIG. 3 is a cross-sectional view of a third blower portion of the second embodiment. The side view of the 2nd blower part of 3rd Embodiment. The side view of the 2nd blower part of 3rd Embodiment. The side view which shows another example of the 4th blower part. The side view which shows another example of the 4th blower part. The side view which shows another example of the 4th blower part. The side view which shows another example of a drying apparatus.

(First Embodiment)
Hereinafter, the first embodiment in which the electrode material drying apparatus is embodied will be described with reference to FIGS. 1 to 7.

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 current collector, 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 the second surface 11b on the opposite side of the first 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.

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 width direction is the direction along the lateral direction of the metal foil 11 conveyed in the drying furnace 30. The width direction is a direction orthogonal to the transport direction. Of both ends of the electrode material 10a in the lateral direction, the end located on the first end side in the width direction is referred to as the first end portion, and the end located on the second end side in the width direction is referred to as the second end portion. do. Further, the direction orthogonal to both the transport direction and the width direction is defined as the vertical direction. 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 blowing units 31, five second blowing units 32, one third blowing unit 33, and one fourth blowing unit 34.

The five first blower portions 31 and the one third blower portion 33 are arranged above the electrode material 10a. The five first blower portions 31 are arranged side by side at intervals in the transport direction, and the third blower portion 33 is arranged on the downstream side of the first blower portion 31 in the transport direction. The five second blower portions 32 and the one fourth blower portion 34 are arranged below the electrode material 10a. The five second blower portions 32 are arranged side by side at intervals in the transport direction, and the fourth blower portion 34 is arranged on the downstream side of the second blower portion 32 in the transport direction. Further, the first blower section 31 and the second blower section 32 are alternately arranged in the transport direction. In other words, the first blower portion 31 and the third blower portion 33 are not arranged so as to face each other with the electrode material 10a sandwiched in the vertical direction. The fourth blower unit 34 is arranged on the upstream side of the third blower unit 33 in the transport direction.

Each first blower portion 31 blows air toward the active material mixture 120 coated on the first surface 11a of the metal foil 11. Each of the second blower portions 32 blows air toward the active material mixture 120 coated on the second surface 11b of the metal foil 11. The first blower section 31 and the second blower section 32 are first main blower sections that send air at a first temperature to the electrode material 10a. The third blower unit 33 blows air toward the active material mixture 120 coated on the first surface 11a of the metal foil 11. The fourth blower unit 34 blows air toward the active material mixture 120 coated on the second surface 11b of the metal foil 11. The third blower unit 33 and the fourth blower unit 34 are second main blower units that send air having a second temperature higher than the first temperature 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 blown from the first blower portion 31 and the third blower portion 33, and is applied to the second surface 11b of the metal foil 11. The active material mixture 120 is dried by blowing air from the second blowing unit 32 and the fourth blowing unit 34. Further, the electrode material 10a is conveyed in a state of being floated from the second blower section 32 and the fourth blower section 34 by the wind sent from the second blower section 32 and the fourth blower section 34.

In the drying furnace 30, the region where the active material mixture 120 is dried by the first blower portion 31 and the second blower portion 32 is designated as the first drying region A1, and the region is activated by the third blower portion 33 and the fourth blower portion 34. The region where the material mixture 120 is dried is designated as the second drying region A2. The second dry region A2 is a region located downstream of the first dry region A1 in the transport direction. In the present embodiment, the length of the first dry region A1 along the transport direction is about three times that 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.

In the second dry region A2, the amount of air blown on the end side, which is the amount of air blown toward both ends of the electrode material 10a in the lateral direction, is the amount of air blown toward the center of the electrode material 10a in the lateral direction. An air volume adjusting mechanism is provided to adjust the air volume so that it is larger than the air volume. In the present embodiment, the air volume adjusting mechanism is provided in the fourth blower unit 34. The first to third blower units 31 to 33 are not provided with an air volume adjusting mechanism. The amount of air blown from each of the first to third air blowers 31 to 33 toward both ends of the electrode material 10a in the lateral direction is the amount of air blown from each of the first to third air blowers 31 to 33. It is the same as the central air flow rate, which is the air flow rate toward the central portion in the lateral direction of the material 10a.

The fourth blower unit 34 will be described in detail.
As shown in FIGS. 4 and 5, the fourth blower 34 has a rotary roll 41. The rotary roll 41 has a cylindrical rotary roll body 42. The rotary roll body 42 is made of steel. Rotating shafts (not shown) supported by holding members (not shown) are attached to both ends of the rotating roll body 42 in the axial direction. By rotating the rotating shaft with a motor (not shown), the rotating roll 41 rotates integrally with the rotating shaft.

As shown in FIGS. 5 and 6, the rotary roll 41 has a plurality of first communication holes 43 that communicate the inside and outside of the rotary roll main body 42. As shown in FIG. 4, the plurality of first communication holes 43 are arranged in the axial direction and the circumferential direction of the rotating roll main body 42. In the present embodiment, the eight first communication holes 43 are arranged in the axial direction of the rotating roll main body 42, and the eight first communication holes 43 are arranged in the circumferential direction of the rotating roll main body 42.

Of the eight first communication holes 43 arranged in the axial direction of the rotary roll body 42, two first communication holes 43 near one end in the axial direction of the rotary roll body 42 and the other end in the axial direction of the rotary roll body 42. Two close first communication holes 43 are designated as end-side communication holes 43a. The end-side communication hole 43a has an elliptical shape in which the long axis extends in the axial direction of the rotating roll body 42 and the short axis extends in the circumferential direction of the rotating roll body 42. Further, of the eight first communication holes 43 arranged in the axial direction of the rotary roll main body 42, the four first communication holes 43 located at the center are designated as the central communication holes 43b. The central communication hole 43b has a circular shape. The diameter Ra along the long axis of the end side communication hole 43a is larger than the diameter Rb of the central communication hole 43b. On the other hand, the diameter along the minor axis of the end side communication hole 43a is the same as the diameter along the minor axis of the central communication hole 43b.

The fourth blower 34 has a fixed roll 44. The fixed roll 44 has a cylindrical fixed roll body 45. The fixed roll body 45 is made of copper. Both ends of the fixed roll body 45 in the axial direction are non-rotatably supported by support members (not shown). The outer diameter of the fixed roll body 45 is smaller than the inner diameter of the rotating roll body 42.

The fixed roll 44 has a plurality of second communication holes 46 that communicate the inside and outside of the fixed roll main body 45. The plurality of second communication holes 46 are arranged in the axial direction and the circumferential direction of the fixed roll main body 45. In the present embodiment, the eight second communication holes 46 are arranged in the axial direction of the fixed roll main body 45, and the eight second communication holes 46 are arranged in the circumferential direction of the fixed roll main body 45.

Of the eight second communication holes 46 arranged in the axial direction of the fixed roll body 45, the two second communication holes 46 near one end of the fixed roll body 45 in the axial direction and the other end of the fixed roll body 45 in the axial direction. Two close second communication holes 46 are designated as end-side communication holes 46a. The end-side communication hole 46a has an elliptical shape in which the long axis extends in the axial direction of the fixed roll main body 45 and the short axis extends in the circumferential direction of the fixed roll main body 45. Further, of the eight second communication holes 46 arranged in the axial direction of the fixed roll main body 45, the four second communication holes 46 located at the center are designated as the central communication holes 46b. The central communication hole 46b has a circular shape.

As shown in FIGS. 5 and 6, the fixed roll main body 45 is arranged inside the rotary roll main body 42 in a state where the axis L1 of the rotary roll main body 42 and the axis L2 of the fixed roll main body 45 coincide with each other. The inside of the fixed roll main body 45 is the first flow path R1, and the space partitioned by the outer peripheral surface of the fixed roll main body 45 and the inner peripheral surface of the rotating roll main body 42 is the second flow path R2. The first flow path R1 and the second flow path R2 communicate with each other through the second communication hole 46. Further, the second flow path R2 and the outside of the rotating roll main body 42 communicate with each other through the first communication hole 43. Gas is supplied to the first flow path R1 by the gas supply unit 47 described later. In the present embodiment, the gas supply unit 47 supplies air as a gas. The air supplied to the first communication flow path R1 flows through the second communication hole 46 into the second communication flow path R2, and then flows out through the first communication hole 43 to the outside of the rotary roll main body 42. That is, the rotary roll 41 blows air outward in the radial direction of the rotary roll main body 42.

The rotary roll 41 and the fixed roll 44 are arranged so that their respective axis lines L1 and L2 are along the width direction. In other words, the rotary roll 41 and the fixed roll 44 are arranged so that the axes L1 and L2 are along the lateral direction of the electrode material 10a. The outer peripheral surface of the rotating roll body 42 faces the electrode material 10a. The rotary roll body 42 has a first end side portion 42a as an end side portion facing the first end portion in the lateral direction of the electrode material 10a and an end facing the second end portion in the lateral direction of the electrode material 10a. It has a second end side portion 42b as a side portion and a central portion 42c facing the central portion in the lateral direction of the electrode material 10a. The two end-side communication holes 43a near one end of the fixed roll body 45 in the axial direction are provided in the first end-side portion 42a, and the two end-side communication holes 43a near the other end of the fixed roll body 45 in the axial direction are provided. , Is provided in the second end side portion 42b. The central communication hole 43b is provided in the central portion 42c.

The fourth blower unit 34 includes a gas supply unit 47. The gas supply unit 47 has a tank 47a for storing gas and a connection pipe 47b for connecting the tank 47a and both ends of the fixed roll main body 45 in the axial direction. The gas in the tank 47a is supplied to the first flow path R1 from both sides in the axial direction of the fixed roll main body 45. In the present embodiment, the amount of gas supplied to the first flow path R1 from one end side in the axial direction of the fixed roll main body 45 and the amount of gas supplied to the first flow path R1 from the other end side in the axial direction of the fixed roll main body 45. The amount of gas is almost the same.

The amount of air sent from the first end side portion 42a to the first end portion of the electrode material 10a in the lateral direction is defined as the first air volume, and the second end of the electrode material 10a from the second end side portion 42b in the lateral direction. The amount of air blown to the unit is defined as the second amount of air blown. The first blast volume and the second blast volume correspond to the above-mentioned end-side blast volume. Further, the amount of air blown from the central portion 42c to the central portion of the electrode material 10a in the lateral direction is defined as the third amount of air blown. The third air volume corresponds to the above-mentioned central air volume. As described above, the diameter Ra along the long axis of the end side communication hole 43a is larger than the diameter Rb of the central communication hole 43b. Therefore, the first blast amount and the second blast amount, which are the end-side blast amounts, are larger than the third blast amount, which is the central blast amount, respectively. That is, the air volume adjusting mechanism is configured such that the diameter of the end side communication hole 43a is larger than the diameter of the central communication hole 43b.

The fourth blower unit 34 has a high frequency power supply 48 that applies a high frequency current to the fixed roll main body 45.
The fourth blower unit 34 has a receiving member 50 that receives the blown air from the rotary roll 41. The receiving member 50 is arranged on the side opposite to the electrode material 10a with the rotating roll 41 interposed therebetween. In the present embodiment, the receiving member 50 is arranged below the rotary roll 41. The receiving member 50 of the present embodiment has two receiving portions arranged side by side in the width direction. Of the two receiving portions, the receiving portion located on the first end side in the width direction is referred to as the first receiving portion 51, and the receiving portion located on the second end side in the width direction is referred to as the second receiving portion 52. The first receiving portion 51 and the second receiving portion 52 are each in the shape of a block.

As shown in FIG. 5, the upper surface 51a of the first receiving portion 51 faces the electrode material 10a. The first receiving portion 51 has a first recess 53 that is recessed from the upper surface 51a. The first recess 53 is recessed in a direction away from the electrode material 10a. When the first receiving portion 51 is viewed from the width direction, the surface forming the first recess 53 has an arc shape. As shown in FIG. 6, the upper surface 52a of the second receiving portion 52 faces the electrode material 10a. The second receiving portion 52 has a second recess 54 recessed from the upper surface 52a. In other words, the second recess 54 is recessed in the direction away from the electrode material 10a. When the second receiving portion 52 is viewed from the width direction, the surface forming the second recess 54 has an arc shape. As shown by the arrows of the alternate long and short dash lines in FIGS. 5 and 6, among the winds sent from the rotary roll 41, the wind flowing in the direction away from the electrode material 10a collides with the recesses 53 and 54 and then collides with the recesses 53 and 54. By flowing along the arc of the above, the direction of the flow is changed so as to be directed toward the electrode material 10a.

As shown in FIG. 4, the fourth blower unit 34 has a first drive unit 55 as a drive unit for moving the first receiving unit 51 in the vertical direction and a drive unit for moving the second receiving unit 52 in the vertical direction. It has a second drive unit 56 of the above.

As shown in FIG. 3, 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 connected to the first detection unit 61. It has a 63 and a confirmation unit 64 connected to the second detection unit 62.

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 fourth blower unit 34 in the transport direction. The second detection unit 62 is arranged on the downstream side of the outlet 302 of the drying furnace 30 in the transport direction. That is, the second detection unit 62 is arranged outside the drying furnace 30. The first detection unit 61 and the second detection unit 62 of the present embodiment each detect the position of the end 10e located at the first end in the width direction of both ends of the electrode material 10a in the lateral direction.

As will be described later, the meandering of the electrode material 10a is corrected by the air volume adjusting mechanism of the fourth blower unit 34. Therefore, the first detection unit 61 detects the position of the end 10e of the electrode material 10a before the meandering is corrected, and the second detection unit 62 detects the position of the end 10e of the electrode material 10a after the meandering is corrected. Detect the position. The first detection unit 61 outputs the position of the detected end 10e of the electrode material 10a to the control unit 63, and the second detection unit 62 outputs the position of the detected end 10e of the electrode material 10a to the confirmation unit 64.

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 corrects the electrode material 10a by comparing the position of the end 10e of the electrode material 10a input from the first detection unit 61 with the position of the end 10e of the electrode material 10a in a non-meandering state. Grasp the amount of meandering forward and the direction of meandering.

Specifically, the control unit 63 sets 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 with respect to the electrode material 10a. Grasp as the amount of meandering before correction. Further, 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. On the other hand, 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. The second orientation is the opposite of the first orientation.

The control unit 63 controls the first drive unit 55 and the second drive unit 56 based on the grasped pre-correction meandering amount and meandering direction. The control unit 63 compares the meandering amount before correction with the predetermined meandering amount for determination. The determination meandering amount is, for example, the meandering amount of the electrode material 10a that is allowed when the winding amount of the electrode material 10a with respect to the take-up roll 23 is taken into consideration.

When the amount of meandering before correction is less than or equal to the amount of meandering for determination, the control unit 63 is the first drive unit 55 so that the first receiving unit 51 and the second receiving unit 52 are located at the same height in the vertical direction. And the second drive unit 56 are controlled. On the other hand, when the amount of meandering before correction exceeds the amount of meandering for determination, the control unit 63 is first driven so that the first receiving unit 51 and the second receiving unit 52 are located at different heights in the vertical direction. It controls the unit 55 and the second drive unit 56.

Specifically, when the amount of meandering before correction exceeds the amount of meandering for determination and the meandering direction is the second direction, the first receiving portion 51 is above and below the second receiving portion 52 as shown in FIG. The control unit 63 controls the first drive unit 55 and the second drive unit 56 so as to be located on the upper side in the direction. As a result, the distance X1 from the bottom surface of the first recess 53 shown in FIG. 5 to the outer peripheral surface of the rotating roll body 42 is from the distance X2 from the bottom surface of the second recess 54 shown in FIG. 6 to the outer peripheral surface of the rotating roll body 42. Will also be shorter. In other words, the distance from the bottom surface of the recesses 53 and 54 to the rotating roll body 42 is shorter at the first end in the lateral direction than at the second end.

When the amount of meandering before correction exceeds the amount of meandering for determination and the meandering direction is the first direction, as shown in FIG. 7, the second receiving portion 52 is above the first receiving portion 51 in the vertical direction. The control unit 63 controls the first drive unit 55 and the second drive unit 56 so as to be located at. As a result, the distance X2 from the bottom surface of the second recess 54 to the outer peripheral surface of the rotating roll body 42 is shorter than the distance X1 from the bottom surface of the first recess 53 to the outer peripheral surface of the rotating roll body 42. In other words, the distance from the bottom surface of the recesses 53 and 54 to the rotating roll body 42 is shorter at the second end in the lateral direction than at the first end.

The confirmation unit 64 stores the position of the end 10e of the electrode material 10a in a non-meandering state. The confirmation unit 64 meanders after correcting 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. Grasp as a quantity. The confirmation unit 64 compares the corrected meandering amount with the judgment meandering amount, and since the corrected meandering amount is equal to or less than the judgment meandering amount, the meandering of the electrode material 10a is appropriately corrected. To confirm.

The operation of the first embodiment will be described.
In the drying device 26, turbulence is generated in the drying furnace 30 by the wind sent from the first to third blower units 31 to 33, and the electrode material 10a swings in the lateral direction under the influence of the turbulence. It may meander like it does. In order to correct the meandering of the electrode material 10a in the lateral direction, the fourth blower portion 34 arranged in the second dry region A2 is provided with an air volume adjusting mechanism.

Even if the electrode material 10a meanders in the first direction, the air volume adjusting mechanism causes the second air volume toward the second end of the electrode material 10a in the lateral direction to be the center of the electrode material 10a in the lateral direction. Since the air volume is larger than the third air volume toward the portion, the electrode material 10a is pressed in the second direction. Further, even if the electrode material 10a meanders in the second direction, the first air volume toward the first end portion of the electrode material 10a in the lateral direction is determined by the air volume adjusting mechanism in the lateral direction of the electrode material 10a. The electrode material 10a is pressed in the first direction because it is larger than the third amount of air blown toward the central portion of the electrode material 10a. Therefore, the meandering of the electrode material 10a in the lateral direction is corrected.

Since the active material mixture 120 is dried to a state of low fluidity by the first drying region A1, even if the amount of air blown to the electrode material 10a is different in the second drying region A2 in the short direction, It is avoided that the active material mixture 120 is washed away and biased.

Further, in the present embodiment, the first drive unit 55 and the second drive unit 56 move the first receiving portion 51 and the second receiving portion 52 in the vertical direction, so that the rotating roll main body is formed from the bottom surface of each of the recesses 53 and 54. The distances X1 and X2 to the outer peripheral surface of 42 can be changed. The shorter the distance from the bottom surface of the recesses 53 and 54 to the rotating roll body 42, the larger the amount of air that collides with the recesses 53 and 54 and bounces off, so that the amount of air sent from the rotary roll 41 to the electrode material 10a increases. ..

Therefore, when the electrode material 10a is meandering in the first direction, the distance X2 from the bottom surface of the second recess 54 to the outer peripheral surface of the rotating roll body 42 is the distance X2 from the bottom surface of the first recess 53 to the rotating roll body. It is made shorter than the distance X1 to the outer peripheral surface of 42. As a result, as shown by the arrows in FIG. 7, the amount of air blown from the rotating roll 41 toward the electrode material 10a is larger at the second end in the lateral direction than at the first end. Therefore, the electrode material 10a meandering in the first direction is pressed in the second direction, and the meandering of the electrode material 10a is further corrected.

On the other hand, when the electrode material 10a is meandering in the second direction in the width direction, the distance X1 from the bottom surface of the first recess 53 to the outer peripheral surface of the rotating roll body 42 rotates from the bottom surface of the second recess 54. It is shorter than the distance X2 to the outer peripheral surface of the roll body 42. As a result, as shown by the arrows in FIG. 4, the amount of air blown from the rotating roll 41 toward the electrode material 10a is larger at the first end in the lateral direction than at the second end. Therefore, the electrode material 10a meandering in the second direction is pressed in the first direction, and the meandering of the electrode material 10a is further corrected.

In this way, by making the distances X1 and X2 between the recesses 53 and 54 and the rotating roll body 42 different 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) Even if the electrode material 10a meanders in the first direction, the second air volume is larger than the third air volume due to the air volume adjusting mechanism, so that the electrode material 10a is the second air volume. Pressed in the direction. Further, even if the electrode material 10a meanders in the second direction, the first air volume is larger than the third air volume due to the air volume adjusting mechanism, so that the electrode material 10a is pressed in the first direction. Will be done. Therefore, the meandering of the electrode material 10a in the lateral direction can be corrected. Since the active material mixture 120 is dried to a state of low fluidity by the first drying region A1, even if the amount of air blown to the electrode material 10a is different in the second drying region A2 in the short direction. , It is possible to prevent the active material mixture 120 from being washed away and biased.

(1-2) The air volume adjusting mechanism is provided in the fourth blower unit 34. Therefore, for example, as compared with the case where a pair of sub-blowers as an air volume adjusting mechanism are provided on both sides of the electrode material 10a in the lateral direction as in the third embodiment described later, the width direction of the drying device 26 It is possible to suppress the increase in size.

(1-3) The air volume adjusting mechanism is configured such that the diameter of the end side communication hole 43a is larger than the diameter of the central communication hole 43b. In this case, since the air volume adjusting mechanism can be configured only by changing the diameter of the first communication hole 43, it is possible to prevent the configuration of the fourth air blowing portion 34 from becoming complicated.

(1-4) When the high frequency power supply 48 applies a high frequency current to the fixed roll body 45, the rotating roll body 42 is induced and heated. Therefore, the air sent from the rotary roll 41 to the electrode material 10a is warmed. The warm air and the radiant heat from the rotating roll body 42 promote the drying of the active material mixture 120. Therefore, the active material mixture 120 can be efficiently dried.

(1-5) When the first receiving portion 51 and the second receiving portion 52 are not arranged on the opposite side of the rotating roll 41 from the electrode material 10a, a part of the wind sent from the rotating roll 41 is an electrode. It flows away from the material 10a. On the other hand, in the present embodiment, since the first receiving portion 51 and the second receiving portion 52 are arranged on the opposite side of the rotating roll 41 from the electrode material 10a, the flow flows in the direction away from the electrode material 10a. After colliding with each of the recesses 53 and 54, the wind flows along the arc of the recesses 53 and 54, thereby changing the direction of the flow toward the electrode material 10a. As a result, the air blown from the rotary roll 41 can be effectively used for drying the active material mixture 120.

When the electrode material 10a meanders in the first direction, the distance X2 from the bottom surface of the second recess 54 to the rotating roll body 42 is the distance from the bottom surface of the first recess 53 to the rotating roll body 42. It is shorter than X1. When the electrode material 10a meanders in the second direction, the distance X1 from the bottom surface of the first recess 53 to the rotating roll body 42 is from the distance X2 from the bottom surface of the second recess 54 to the rotating roll body 42. Is also shortened. The shorter the distances X1 and X2 from the bottom surfaces of the recesses 53 and 54 to the rotating roll body 42, the larger the amount of air blown from the rotating roll 41 toward the electrode material 10a.

Therefore, when the electrode material 10a meanders in the first direction, the amount of air blown from the rotating roll 41 toward the electrode material 10a is larger at the second end in the lateral direction than at the first end. Become. Therefore, the electrode material 10a meandering in the first direction is pressed in the second direction, and the meandering of the electrode material 10a is further corrected. Further, when the electrode material 10a meanders in the second direction, the amount of air blown from the rotating roll 41 toward the electrode material 10a is larger at the first end in the lateral direction than at the second end. .. Therefore, the electrode material 10a meandering in the second direction is pressed in the first direction, and the meandering of the electrode material 10a is further corrected. In this way, by making the distances X1 and X2 different according to the meandering direction of the electrode material 10a, the meandering of the electrode material 10a in the lateral direction can be further corrected.

Further, the first receiving portion 51 and the second receiving portion 52 can prevent the wind bounced off the electrode material 10a after being sent from the rotary roll 41 from interfering with the wind sent from the rotary roll 41.

(Second Embodiment)
Hereinafter, a second embodiment in which the electrode material drying apparatus is embodied will be described with reference to FIGS. 8 to 10. Since the configurations of the drying furnace 30, the first blower section 31, and the second blower section 32 are the same as those in the first embodiment, the description thereof will be omitted.

In the second dry region A2, the amount of air blown on the end side, which is the amount of air blown toward both ends of the electrode material 10a in the lateral direction, is the amount of air blown toward the center of the electrode material 10a in the lateral direction. An air volume adjusting mechanism is provided to adjust the air volume so that it is larger than the air volume. In the present embodiment, the air volume adjusting mechanism is provided in the third air blowing unit 33.

The fourth blower unit 34 is not provided with an air volume adjusting mechanism. The amount of air blown from the fourth blower 34 toward both ends of the electrode material 10a in the short direction is the amount of air blown from the fourth blower 34 toward the center of the electrode material 10a in the short direction. It is the same as the central air volume.

The third blower 33 will be described in detail.
As shown in FIGS. 8 to 10, the third blower portion 33 has a box-shaped main body portion 33a. The main body 33a has a square tubular tubular wall 35 whose axis extends in the vertical direction, an upper wall 36 connected to the upper end of the tubular wall 35, and a lower wall 37 connected to the lower end of the tubular wall 35. The lower wall 37 has a first end side portion 37a as an end side portion facing the first end portion in the lateral direction of the electrode material 10a and an end side facing the second end portion in the lateral direction of the electrode material 10a. It has a second end side portion 37b as a portion and a central portion 37c facing the central portion in the lateral direction of the electrode material 10a.

The third air blowing portion 33 has a plurality of communication holes 38 that allow communication between the inside and outside of the main body portion 33a by penetrating the lower wall 37. The plurality of communication holes 38 are arranged in the width direction and the transport direction. Of the plurality of communication holes 38, the communication hole provided in the first end side portion 37a is designated as the first end side communication hole 38a as the end side communication hole, and the communication hole provided in the second end side portion 37b is the end. The second end side communication hole 38b is used as the side communication hole, and the communication hole provided in the central portion 37c is referred to as the central communication hole 38c.

The third ventilation unit 33 has a first partition wall 39a and a second partition wall 39b as partition walls provided inside the main body portion 33a. The inside of the main body 33a is divided into three spaces, the first to third spaces S1 to S3, by the first partition wall 39a and the second partition wall 39b. The first partition wall 39a partitions the first space S1 and the third space S3, and the second partition wall 39b partitions the second space S2 and the third space S3.

The first partition wall 39a is located on the first end side of the center in the width direction, and the second partition wall 39b is located on the second end side of the center in the width direction. The first partition wall 39a has a first partition 391 that partitions the inside of the main body 33a in the vertical direction, and a second partition 392 that partitions the inside of the main body 33a in the width direction. The second partition wall 39b has a third partition 393 that partitions the inside of the main body 33a in the vertical direction, and a fourth partition 394 that partitions the inside of the main body 33a in the width direction.

The first space S1 is partitioned in the lower part of the main body 33a and on the first end side in the width direction, and the second space S2 is partitioned in the lower part of the main body 33a and on the second end side in the width direction. The third space S3 is divided into a lower portion in the main body portion 33a and a center in the width direction and an upper portion in the main body portion 33a. The first space S1 is an end-side space that communicates with the outside of the main body 33a by the first end-side communication hole 38a. The second space S2 is an end-side space that communicates with the outside of the main body 33a by the second end-side communication hole 38b. The first space S1 and the second space S2 have a symmetrical shape in the width direction. The third space S3 is a central space that communicates with the outside of the main body 33a through the central communication hole 38c.

As shown in FIG. 8, the third blower unit 33 has a gas supply unit 40 for supplying air into the main body unit 33a. The gas supply unit 40 has a tank 70 for storing air, and first to fourth connection pipes 71 to 74 for connecting the tank 70 and the main body 33a. The air in the tank 70 can be supplied to the first space S1 via the first connecting pipe 71. The air in the tank 70 can be supplied to the second space S2 via the second connecting pipe 72. The air in the tank 70 can be supplied to the third space S3 via the third connecting pipe 73 and the fourth connecting pipe 74.

A first valve 75 is provided in the middle of the first connecting pipe 71. When the first valve 75 is in the open state, the air in the tank 70 is supplied to the first space S1, and when the first valve 75 is in the closed state, air is not supplied to the first space S1. A second valve 76 is provided in the middle of the second connecting pipe 72. When the second valve 76 is in the open state, the air in the tank 70 is supplied to the second space S2, and when the second valve 76 is in the closed state, the air is not supplied to the second space S2.

A third valve 77 is provided in the middle of the third connecting pipe 73, and a fourth valve 78 is provided in the middle of the fourth connecting pipe 74. When at least one of the third valve 77 and the fourth valve 78 is in the open state, the air in the tank 70 is supplied to the third space S3, and when both the third valve 77 and the fourth valve 78 are in the closed state, the third valve 77 and the fourth valve 78 are in the closed state. No air is supplied to the three spaces S3.

The amount of air supplied to the first space S1 is the first supply amount as the end side supply amount, and the amount of air supplied to the second space S2 is the second supply amount as the end side supply amount. And. The control unit 63 can set the first supply amount to a desired supply amount by controlling the first valve 75, and can set the second supply amount to a desired supply amount by controlling the second valve 76. Can be set to. Further, the amount of air supplied to the third space S3 is defined as the third supply amount as the central supply amount. The control unit 63 can set the third supply amount to a desired supply amount by controlling the third valve 77 and the fourth valve 78.

The air supplied to the first space S1 flows from the first end side communication hole 38a toward the first end portion of the electrode material 10a in the lateral direction. The amount of air blown from the first end side communication hole 38a toward the first end portion of the electrode material 10a in the lateral direction is defined as the first air flow amount. The air supplied to the second space S2 flows from the second end side communication hole 38b toward the second end portion of the electrode material 10a in the lateral direction. The amount of air blown from the second end side communication hole 38b toward the second end portion of the electrode material 10a in the lateral direction is defined as the second amount of air blown. The first air volume and the second air volume correspond to the end side air volume. The air supplied to the third space S3 flows from the central communication hole 38c toward the central portion of the electrode material 10a in the lateral direction. The amount of air blown from the central communication hole 38c toward the central portion of the electrode material 10a in the lateral direction is defined as the third amount of air blown. The third air volume corresponds to the central air volume.

The control unit 63 has a relationship between the first supply amount and the first air flow amount, a relationship between the second supply amount and the second air amount, and a relationship between the third supply amount and the third air amount. I remember. The control unit 63 sets the first to third supply amounts so that each of the first air flow amount and the second air flow amount is larger than the third air blow amount. That is, the control unit 63 sets the end-side supply amount and the central supply amount so that the end-side air supply amount is larger than the central air-blowing amount. That is, the air volume adjusting mechanism of the present embodiment is a control unit that sets the first to third supply amounts so that each of the first air volume and the second air volume is larger than the third air volume. It is composed of 63. The control unit 63 controls the first to fourth valves 75 to 77 so that the first to third supply amounts become the set first to third supply amounts.

Further, the control unit 63 sets the first supply amount and the second supply amount based on the pre-correction meandering amount and the meandering direction of the electrode material 10a. The control unit 63 compares the meandering amount before correction with the predetermined meandering amount for determination. When the pre-correction meandering amount is less than or equal to the determination meandering amount, the control unit 63 supplies the first supply amount and the second supply amount so that the first air flow amount and the second air flow amount are the same. Set the amount to the same amount. On the other hand, when the pre-correction meandering amount exceeds the determination meandering amount, the control unit 63 determines the first supply amount and the second supply amount so that the first air flow amount and the second air flow amount are different. And set.

Specifically, when the amount of meandering before correction exceeds the amount of meandering for determination and the meandering direction is the second direction, as shown in FIG. 9, the control unit 63 has a second air flow amount. The first supply amount is set to be larger than the second supply amount so as to be larger than the air flow amount. When the amount of meandering before correction exceeds the amount of meandering for determination and the meandering direction is the first direction, as shown in FIG. 10, the control unit 63 has a second amount of air blown from the first amount of air. The second supply amount is set to be larger than the first supply amount so that the amount is also large.

The operation of the second embodiment will be described.
In the drying device 26, turbulence is generated in the drying furnace 30 by the wind sent from the first, second, and fourth blower units 31, 32, 34, and the electrode material 10a is shortened due to the influence of the turbulence. It may meander so as to swing in the hand direction. In order to correct the meandering of the electrode material 10a in the lateral direction, the third blower portion 33 arranged in the second dry region A2 is provided with an air volume adjusting mechanism.

Even if the electrode material 10a meanders in the first direction, the air volume adjusting mechanism causes the second air volume toward the second end of the electrode material 10a in the lateral direction to be the center of the electrode material 10a in the lateral direction. Since the air volume is larger than the third air volume toward the portion, the electrode material 10a is pressed in the second direction. Further, even if the electrode material 10a meanders in the second direction, the first air volume toward the first end portion of the electrode material 10a in the lateral direction is determined by the air volume adjusting mechanism in the lateral direction of the electrode material 10a. The electrode material 10a is pressed in the first direction because it is larger than the third amount of air blown toward the central portion of the electrode material 10a. Therefore, the meandering of the electrode material 10a in the lateral direction is corrected.

Since the active material mixture 120 is dried to a state of low fluidity by the first drying region A1, even if the amount of air blown to the electrode material 10a is different in the second drying region A2 in the short direction, It is avoided that the active material mixture 120 is washed away and biased.

Further, the control unit 63 of the present embodiment can set the first supply amount and the second supply amount so that the first air flow amount and the second air flow amount are different from each other. Specifically, when the electrode material 10a meanders in the first direction, the control unit 63 receives a first supply amount so that the second air flow amount is larger than the first air flow amount. And set the second supply amount. Therefore, the electrode material 10a meandering in the first direction is pressed in the second direction, and the meandering of the electrode material 10a is further corrected. On the other hand, when the electrode material 10a meanders in the second direction, the control unit 63 determines the first supply amount and the second air supply amount so that the first air flow amount is larger than the second air flow amount. Set the supply amount of. Therefore, the electrode material 10a meandering in the second direction is returned to the first direction, and the meandering of the electrode material 10a is further corrected. In this way, by making the first air flow amount and the second air flow amount different 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) and (1-2) of the first embodiment, the following effects can be obtained.
(2-1) The partition walls 39a and 39b partition the inside of the main body 33a, and the control unit 63 so that the first air volume and the second air volume are larger than the third air volume. Since the air volume adjusting mechanism can be configured only by setting the first to third supply amounts, it is possible to prevent the configuration of the third blower unit 33 from becoming complicated.

(2-2) When the electrode material 10a meanders in the first direction, the control unit 63 receives a first supply amount so that the second air flow amount is larger than the first air flow amount. And set the second supply amount. As a result, the amount of air blown from the third blower portion 33 toward the electrode material 10a is larger at the second end in the lateral direction than at the first end. Therefore, the electrode material 10a meandering in the first direction is pressed in the second direction, and the meandering of the electrode material 10a is further corrected.

When the electrode material 10a meanders in the second direction, the control unit 63 determines the first supply amount and the second supply amount so that the first air amount is larger than the second air amount. Set the amount. As a result, the amount of air blown from the third blower portion 33 toward the electrode material 10a is larger at the first end in the lateral direction than at the second end. Therefore, the electrode material 10a meandering in the second direction is pressed in the first direction, and the meandering of the electrode material 10a is further corrected. In this way, by making the first air blowing amount and the second air blowing amount different according to the meandering direction of the electrode material 10a, the meandering of the electrode material 10a in the lateral direction can be further corrected.

(Third Embodiment)
Hereinafter, a third embodiment in which the electrode material drying apparatus is embodied will be described with reference to FIGS. 11 and 12. Since the configurations of the drying furnace 30, the first blower section 31, and the second blower section 32 are the same as those in the first embodiment, the description thereof will be omitted.

In the second dry region A2, the amount of air blown on the end side, which is the amount of air blown toward both ends of the electrode material 10a in the lateral direction, is the amount of air blown toward the center of the electrode material 10a in the lateral direction. An air volume adjusting mechanism is provided to adjust the air volume so that it is larger than the air volume. In the present embodiment, the air volume adjusting mechanism is composed of a pair of sub-blowers, which will be described later.

The third blower section 33 and the fourth blower section 34 are not provided with an air volume adjusting mechanism. The amount of air blown from the third blower 33 toward both ends of the electrode material 10a in the short direction is the amount of air blown from the third blower 33 toward the center of the electrode material 10a in the short direction. It is the same as the central air volume. Further, the end-side airflow amount, which is the amount of air blown from the fourth blower portion 34 toward both ends of the electrode material 10a in the lateral direction, is directed from the fourth blower portion 34 toward the central portion of the electrode material 10a in the lateral direction. It is the same as the central air volume, which is the air volume.

As shown in FIGS. 11 and 12, the drying device 26 has a pair of sub-blowers arranged on both sides of the electrode material 10a in the lateral direction in the second drying region A2. Of the pair of sub-blowers, the sub-blower located on the first end side in the width direction is the first sub-blower 81, and the sub-blower located on the second end side in the width direction is the second sub-blower 82. And. The first sub-blower 81 blows air toward the first end of the electrode material 10a in the lateral direction, and the second sub-blower 82 blows air toward the second end of the electrode material 10a in the lateral direction. do. That is, the pair of sub-blowers blows air toward both ends of the electrode material 10a in the lateral direction.

The central portion of the electrode material 10a in the lateral direction is hit by the air sent from the third blower portion 33 and the fourth blower portion 34, whereas the both ends of the electrode material 10a in the lateral direction are hit by the third blower. In addition to the wind sent from the unit 33 and the fourth air blowing unit 34, the air sent from the sub air blowing units 81 and 82 also hits. Therefore, the amount of air blown toward both ends of the electrode material 10a in the lateral direction is larger than the amount of air blown toward the center of the electrode material 10a in the lateral direction. ..

The drying device 26 has a gas supply unit 83 that supplies gas to the first sub air blower 81 and the second sub air blower 82. The gas supply unit 83 includes a tank 90 for storing gas, a first supply pipe 91 for connecting the tank 90 and the first sub air blower 81, and a second supply for connecting the tank 90 and the second sub air blower 82. It has a pipe 92.

A first valve 93 is provided in the middle of the first supply pipe 91. When the first valve 93 is in the open state, the air in the tank 90 is supplied to the first sub-blower 81, and when the first valve 93 is in the closed state, the air is not supplied to the first sub-blower 81. A second valve 94 is provided in the middle of the second supply pipe 92. When the second valve 94 is in the open state, the air in the tank 90 is supplied to the second sub-blower 82, and when the second valve 94 is in the closed state, the air is not supplied to the second sub-blower 82. The amount of air supplied to the first sub-blower 81 is defined as the first supply amount, and the amount of air supplied to the second sub-blower 82 is defined as the second supply amount.

The control unit 63 controls the first valve 93 and the second valve 94 based on the pre-correction meandering amount and the meandering direction of the electrode material 10a. The control unit 63 compares the meandering amount before correction with the predetermined meandering amount for determination. When the pre-correction meandering amount is less than or equal to the determination meandering amount, the control unit 63 sets the first valve 93 and the second valve so that the first supply amount and the second supply amount are the same. Control 94. On the other hand, when the pre-correction meandering amount exceeds the determination meandering amount, the control unit 63 controls the first valve 93 and the second valve 94 so that the first supply amount and the second supply amount are different. do.

Specifically, when the pre-correction meandering amount exceeds the determination meandering amount and the meandering direction is the second direction, the control unit 63 so that the first supply amount becomes larger than the second supply amount. Controls the first valve 93 and the second valve 94. As a result, as shown by an arrow in FIG. 11, the first amount of air blown from the first sub-blower 81 toward the first end of the electrode material 10a in the lateral direction is the electrode material from the second sub-blower 82. It is larger than the second amount of air blown toward the second end in the lateral direction of 10a.

When the pre-correction meandering amount exceeds the determination meandering amount and the meandering direction is the first direction, the control unit 63 sets the second supply amount so that the second supply amount becomes larger than the first supply amount. It controls the 1st valve 93 and the 2nd valve 94. As a result, as shown by an arrow in FIG. 12, the second amount of air blown from the second sub-blower 82 toward the second end of the electrode material 10a in the lateral direction is the electrode material from the first sub-blower 81. It is larger than the first air volume toward the first end portion in the lateral direction of 10a.

The operation of the third embodiment will be described.
In the drying device 26, turbulence is generated in the drying furnace 30 by the wind sent from the first to fourth blower units 31 to 34, and the electrode material 10a swings in the lateral direction due to the influence of the turbulence. It may meander like it does. In order to correct the meandering of the electrode material 10a in the lateral direction, a first sub-blower 81 and a second sub-blower 82 as an air volume adjusting mechanism are arranged in the second dry region A2.

Even if the electrode material 10a meanders in the first direction, the amount of air blown toward the second end portion of the electrode material 10a in the lateral direction due to the air blown from the second sub-blower portion 82 is the short side of the electrode material 10a. Since the air volume is larger than the air volume toward the central portion in the direction, the electrode material 10a is pressed in the second direction. Further, even if the electrode material 10a meanders in the second direction, the amount of air blown toward the first end portion of the electrode material 10a in the lateral direction due to the air blown from the first sub-blower portion 81 is the same as that of the electrode material 10a. Since the amount of air blown toward the central portion in the lateral direction is larger than the amount of air blown toward the central portion, the electrode material 10a is pressed in the first direction. Therefore, the meandering of the electrode material 10a in the lateral direction is corrected.

Since the active material mixture 120 is dried to a state of low fluidity by the first drying region A1, even if the amount of air blown to the electrode material 10a is different in the second drying region A2 in the short direction, It is avoided that the active material mixture 120 is washed away and biased.

Further, in the present embodiment, the first amount of air blown from the first sub-blower 81 toward the first end of the electrode material 10a in the lateral direction and the second sub-blower 82 in the lateral direction of the electrode material 10a. The amount of air blown toward the second end of the can be made different.

Specifically, when the electrode material 10a meanders in the first direction, the second air blowing amount is set to be larger than the first air blowing amount. As a result, the electrode material 10a meandering in the first direction is pressed in the second direction, and the meandering of the electrode material 10a is further corrected. On the other hand, when the electrode material 10a meanders in the second direction, the first air blowing amount is set to be larger than the second air blowing amount. As a result, the electrode material 10a meandering in the second direction is pressed in the first direction, and the meandering of the electrode material 10a is further corrected. In this way, by making the first air flow amount and the second air flow amount different 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 third embodiment will be described. In the third embodiment, in addition to the effect (1-1) of the first embodiment, the following effects can be obtained.
(3-1) The air volume adjusting mechanism is composed of a first sub-blower 81 and a second sub-blower 82. In this case, the air volume adjusting mechanism can be easily configured only by providing the sub-blowers 81 and 82 on both sides of the electrode material 10a in the lateral direction.

(3-2) When the electrode material 10a meanders in the first direction, the second air blowing amount is set to be larger than the first air blowing amount. As a result, the electrode material 10a meandering in the first direction is pressed in the second direction, and the meandering of the electrode material 10a is corrected. Further, when the electrode material 10a meanders in the second direction, the first air blowing amount is set to be larger than the second air blowing amount. As a result, the electrode material 10a meandering in the second direction is pressed in the first direction, and the meandering of the electrode material 10a is corrected. In this way, by making the first air flow amount and the second air flow amount different according to the meandering direction of the electrode material 10a, 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, if the electrode material 10a is conveyed in the drying furnace 30 so that the surface coated with the active material mixture 120 faces the upper surface, and the third blower 33 is provided with an air volume adjusting mechanism, the third The 2 blower portion 32 and the 4th blower portion 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 second detection unit 62 may be arranged in the drying furnace 30 as long as it detects the end 10e of the electrode material 10a after the meandering is corrected.
○ The second detection unit 62 and the confirmation unit 64 may be omitted.

○ The number of the first blower portions 31 included in the drying device 26 may be changed as appropriate.
○ The number of the second blower 32 included in the drying device 26 may be changed as appropriate.
○ The number of the third blower 33 included in the drying device 26 may be changed as appropriate.

○ The number of the fourth blower 34 included in the drying device 26 may be changed as appropriate.
○ In the first embodiment, the fixed roll 44 and the high frequency power supply 48 may be omitted.
○ In the first embodiment, the receiving member 50 may be omitted. In this case, the first drive unit 55, the second drive unit 56, the first detection unit 61, and the control unit 63 can also be omitted.

○ In the first embodiment, if the diameter of the end side communication hole 43a is larger than the diameter of the central communication hole 43b, the shapes of the end side communication hole 43a and the central communication hole 43b may be appropriately changed. Further, the diameter of the end-side communication holes 43a does not have to be the same for all the end-side communication holes 43a. For example, among the plurality of end-side communication holes 43a, the diameter of the end-side communication hole 43a located on the end side in the width direction may be larger than the diameter of the end-side communication hole 43a near the center in the width direction.

○ In the first embodiment, the configuration of the rotary roll 41 may be changed as follows.
As shown in FIG. 13, the rotary roll 41 has a plurality of first communication holes 43 that communicate the inside and outside of the rotary roll main body 42. The plurality of first communication holes 43 are arranged in the axial direction and the circumferential direction of the rotating roll main body 42. Each first communication hole 43 has a circular shape, and the diameter of each first communication hole 43 is the same for all the first communication holes 43.

In the first end side portion 42a, three first communication holes 43 are arranged in the axial direction of the rotating roll main body 42, and ten first communication holes 43 are arranged in the circumferential direction of the rotating roll main body 42. In the second end side portion 42b, three first communication holes 43 are arranged in the axial direction of the rotating roll main body 42, and ten first communication holes 43 are arranged in the circumferential direction of the rotating roll main body 42. In the central portion 42c, the four first communication holes 43 are arranged in the axial direction of the rotating roll main body 42, and the six first communication holes 43 are arranged in the circumferential direction of the rotating roll main body 42. That is, the number of the first communication holes 43 provided in the end side portions 42a and 42b is larger than the number of the first communication holes 43 provided in the central portion 42c.

Therefore, the first blast amount and the second blast amount, which are the end-side blast amounts, are larger than the third blast amount, which is the central blast amount, respectively. That is, the air volume adjusting mechanism is configured such that the number of the first communication holes 43 provided in the end side portions 42a and 42b is larger than the number of the first communication holes 43 provided in the central portion 42c. ..

With the above configuration, the same effects as those of the first embodiment (1-1) and (1-2) can be obtained. Further, since the air volume adjusting mechanism can be configured only by changing the number of the first communication holes 43, it is possible to prevent the configuration of the fourth air blowing portion 34 from becoming complicated.

If the number of the first communication holes 43 provided in the end side portions 42a and 42b is larger than the number of the first communication holes 43 provided in the central portion 42c, the number of the first communication holes 43 is appropriate. You may change it. Further, the number of the first communication holes 43 arranged in the circumferential direction in the end side portions 42a and 42b does not have to be the same in the width direction. For example, the number of first communication holes 43 arranged in the circumferential direction in the portions located on the end side in the width direction of the end side portions 42a and 42b is a portion close to the center in the width direction of the end side portions 42a and 42b. May be set to be larger than the number of first communication holes 43 arranged in the circumferential direction.

-In the first embodiment, the receiving member 50 may be composed of three or more receiving portions arranged in the lateral direction of the electrode material 10a.
○ In the first embodiment, the configuration of the receiving member 50 may be changed as follows.

As shown in FIGS. 14 and 15, the fourth blower unit 34 has a receiving member 50 arranged on the side opposite to the electrode material 10a with the rotating roll 41 interposed therebetween, and a driving unit 57 for driving the receiving member 50. Be prepared. The dimension of the receiving member 50 in the width direction is slightly shorter than the dimension of the rotating roll 41 in the width direction. The receiving member 50 has a recess 50a that is recessed in a direction away from the electrode material 10a. Although not shown, when the receiving member 50 is viewed from the width direction, the surface forming the recess 50a has an arc shape. The receiving member 50 has a first end portion 50b located on the first end side in the width direction and a second end portion 50c located on the second end side in the width direction. The drive unit 57 can incline the receiving member 50 so that the heights of the first end portion 50b and the second end portion 50c in the vertical direction are different.

When the meandering direction of the electrode material 10a is the second direction, as shown in FIG. 14, the driving unit 57 sets the receiving member 50 so that the first end portion 50b is located above the second end portion 50c. Tilt. As a result, the distance from the bottom surface of the recess 50a to the rotating roll body 42 is shorter at the first end in the lateral direction than at the second end. The shorter the distance from the bottom surface of the recess 50a to the rotating roll body 42, the larger the amount of gas that collides with the recess 50a and bounces off. Therefore, the amount of air sent from the rotary roll 41 to the electrode material 10a is the second in the lateral direction. There are more at one end than at the second end.

On the other hand, when the meandering direction of the electrode material 10a is the first direction, as shown in FIG. 15, the drive unit 57 is a receiving member so that the second end portion 50c is located above the first end portion 50b. Tilt 50. As a result, the distance from the bottom surface of the recess 50a to the rotating roll body 42 is shorter at the second end in the lateral direction than at the first end. Therefore, the amount of air blown from the rotary roll 41 to the electrode material 10a is larger at the second end in the lateral direction than at the first end.

In this case as well, the same effect as the effect (1-5) of the first embodiment can be obtained.
-In the first embodiment, fins may be provided on the inner peripheral surface of the rotating roll main body 42. In this case, since the surface area of the rotating roll main body 42 is increased by the fins, the air sent from the rotating roll 41 to the electrode material 10a can be heated more efficiently.

○ In the first embodiment, the third blower unit 33 may have the same configuration as the fourth blower unit 34.
○ In the second embodiment, the fourth blower unit 34 may have the same configuration as the third blower unit 33.

○ In the second embodiment, the first air flow amount from the first end side communication hole 38a toward the first end portion of the electrode material 10a in the lateral direction and the short length of the electrode material 10a from the second end side communication hole 38b. The amount of the second air blow toward the second end in the manual direction may always be set to the same amount.

○ In the third embodiment, the first amount of air blown from the first sub-blower 81 toward the first end of the electrode material 10a in the lateral direction and the second sub-blower 82 in the lateral direction of the electrode material 10a. The second air volume toward the second end portion of the above may always be set to the same amount.

○ In the second embodiment, the arrangement of the first to third spaces S1 to S3 in the main body 33a may be changed as appropriate. For example, in the first to third spaces S1 to S3, the first space S1 is located on the first end side in the width direction in the main body 33a, and the second space S2 is the second end in the width direction in the main body 33a. It may be partitioned by partition walls 39a and 39b so that the third space S3 is located on the side and is located in the center of the main body 33a in the width direction.

○ In the second embodiment, the inside of the main body 33a is divided into an end space that communicates with the outside of the main body 33a by an end side communication hole and a central space that communicates with the outside of the main body 33a by a central communication hole by a partition wall. If so, it does not have to be divided into three spaces. For example, the central space is divided into the lower part in the main body 33a and the center in the width direction, and the end side space is divided into the lower part in the main body 33a and both ends in the width direction and the upper part in the main body 33a. You may.

○ As shown in FIG. 16, the configurations of the second embodiment and the third embodiment may be combined. That is, the drying device 26 may have a third air blowing unit 33 provided with an air volume adjusting mechanism and a pair of sub air blowing units. The first sub-blower 81 and the second sub-blower 82 are arranged at the same positions as the third blower 33 in the transport direction.

In this case, the air sent from the first end side communication hole 38a of the third air blowing unit 33 is affected by the air blown from the first sub air blowing unit 81, and thus heads toward the lower side in the vertical direction and the center in the width direction. Flows. Further, the air sent from the second end side communication hole 38b of the third blower 33 is affected by the blow from the second sub-blower 82, so that the wind is directed toward the lower side in the vertical direction and the center in the width direction. It flows. Therefore, the meandering of the electrode material 10a in the lateral direction can be further corrected.

10a ... Electrode material, 11 ... Metal leaf as a base material, 26 ... Electrode material drying device, 30 ... Drying furnace, 31 ... First blower as the first main blower, 32 ... As the first main blower 2nd blower, 33 ... 3rd blower as 2nd main blower, 33a ... main body, 34 ... 4th blower as 2nd main blower, 37a ... 1st end side part as end side part , 37b ... Second end side part as end side part, 37c ... Central part, 38 ... Communication hole, 38a ... First end side communication hole as end side communication hole, 38b ... Second end as end side communication hole Side communication hole, 38c ... Central communication hole, 39a ... First partition wall as a partition wall, 39b ... Second partition wall as a partition wall, 41 ... Rotating roll, 42 ... Rotating roll body, 42a ... As end side part 1st end side part, 42b ... 2nd end side part as end side part, 42c ... central part, 43 ... first communication hole, 44 ... fixed roll, 45 ... fixed roll body, 46 ... second communication hole, 47 ... gas supply unit, 48 ... high frequency power supply, 50 ... receiving member, 53 ... first recess as recess, 54 ... second recess as recess, 55 ... first drive unit as drive unit, 56 ... as drive unit 2nd drive unit, 57 ... drive unit, 63 ... control unit, 81 ... first sub-blower unit as sub-blower unit, 82 ... second sub-blower unit as sub-blower unit, 120 ... active material mixture as slurry , A1 ... 1st dry region, A2 ... 2nd dry region, S1 ... 1st space as end side space, S2 ... 2nd space as end side space, S3 ... 3rd space as central space, L1 ... axis , L2 ... Axis.

Claims (8)

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.
A first main air blower, which is arranged inside the drying furnace and blows air at a first temperature toward the slurry,
A second air is arranged inside the drying furnace on the downstream side of the first main blower portion in the transport direction of the electrode material, and blows air having a second temperature higher than the first temperature toward the slurry. With the main blower
With
The slurry has a first drying region in which the slurry is dried by blowing air from the first main blowing unit, and a second drying region in which the slurry is dried by blowing air from the second main blowing unit.
In the second dry region, the amount of air blown on the end side, which is the amount of air blown toward both ends of the electrode material in the lateral direction, is the amount of air blown toward the central portion of the electrode material in the lateral direction. An electrode material drying device characterized in that an air volume adjusting mechanism for adjusting the air volume so as to be larger than the air volume is provided. The electrode material drying device according to claim 1, wherein the air volume adjusting mechanism is provided in the second main air blowing unit. The second main blower is
A tubular rotary roll body whose axis extends in the lateral direction of the electrode material, and a plurality of first communication holes arranged in the axial direction and the circumferential direction of the rotary roll body while communicating the inside and outside of the rotary roll body. With a rotating roll to have
A gas supply unit that supplies gas into the rotating roll body and
Have,
The rotary roll body has a pair of end-side portions facing both ends in the lateral direction of the electrode material, and a central portion facing the central portion in the lateral direction of the electrode material.
According to claim 2, the air volume adjusting mechanism is configured such that the diameter of the first communication hole provided in the end side portion is larger than the diameter of the first communication hole provided in the central portion. The electrode material drying device according to the description. The second main blower is
A tubular rotary roll body whose axis extends in the lateral direction of the electrode material and gas is supplied to the inside, and the inside and outside of the rotary roll body are communicated with each other and arranged in the axial direction and the circumferential direction of the rotary roll body. A rotary roll having a plurality of first communication holes and
A gas supply unit that supplies gas into the rotating roll body and
Have,
The rotary roll body has a pair of end-side portions facing both ends in the lateral direction of the electrode material, and a central portion facing the central portion in the lateral direction of the electrode material.
According to claim 2, the air volume adjusting mechanism is configured such that the number of the first communication holes provided in the end side portion is larger than the number of the first communication holes provided in the central portion. The electrode material drying device according to the description. The second main blower is
Inside the rotating roll, a tubular fixed roll body is arranged so that the axis extends in the lateral direction of the electrode material, and the gas is supplied to the inside by the gas supply unit, and inside and outside of the fixed roll body. And a fixed roll having a plurality of second communication holes arranged in the axial direction and the circumferential direction of the fixed roll body.
A high-frequency power supply that applies a high-frequency current to the fixed roll body,
The electrode material drying apparatus according to claim 3 or 4. The second main blower portion has a receiving member arranged on the side opposite to the electrode material with the rotating roll interposed therebetween, and a driving portion for driving the receiving member.
The receiving member has a recess that is recessed in a direction away from the electrode material.
When the electrode material meanders in the first direction from the first end to the second end in the lateral direction, the distance from the bottom surface of the recess to the rotating roll body is the second end in the lateral direction. Is shorter than the first end,
When the electrode material is meandering in a second direction opposite to the first direction, the distance from the bottom surface of the recess to the rotating roll body is the first end in the lateral direction. The electrode material drying apparatus according to any one of claims 3 to 5, wherein the electrode material is shorter than the second end. The second main blower portion has a box-shaped main body portion to which gas is supplied to the inside, a partition wall provided inside the main body portion, and a plurality of communication holes for communicating the inside and outside of the main body portion. death,
The main body portion has a pair of end-side portions facing both ends in the lateral direction of the electrode material, and a central portion facing the central portion in the lateral direction of the electrode material.
The plurality of communication holes include an end-side communication hole provided at the end-side portion and a central communication hole provided at the central portion.
The inside of the main body is divided into an end-side space that communicates with the outside of the main body by the end-side communication hole and a central space that communicates with the outside of the main body by the central communication hole.
When the gas supply amount to the end side space is the end side supply amount and the gas supply amount to the central space is the central supply amount,
The air volume adjusting mechanism has the end-side supply amount and the center so that the amount of air blown from the end-side communication hole toward the electrode material is larger than the amount of air blown from the central communication hole toward the electrode material. The electrode material drying device according to claim 2, which is composed of a control unit that sets a supply amount. The air volume adjusting mechanism is arranged on both sides of the electrode material in the lateral direction in the second drying region, and is composed of a pair of sub-blowers that blow air toward both ends of the electrode material in the lateral direction. The electrode material drying apparatus according to claim 1.

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