Electrode plate manufacturing device

Abstract

The present invention makes it easy to uniformly extend an unformed portion of an electrode sheet. An electrode sheet manufacturing device (1) is provided with: a support roller (61) that supports an electrode sheet (10); a squeeze roller (62) that sandwiches the electrode sheet and is disposed so as to face the support roller (61); and a control device (100). At least the outer peripheral surface of the squeeze roller (62) is formed from rubber. In a control device (100), a movement control unit (105) moves a squeeze roller (62) from a first position (P1) away from an electrode sheet to a second position (P2) in contact with the electrode sheet (10) before starting the conveyance of the electrode sheet. After the squeeze roller (62) moves to the second position (P2), the conveyance control unit (107) conveys the electrode sheet. When the conveyance of the electrode sheet is started or when a reference time (T2) has elapsed after the conveyance of the electrode sheet (10) is started, the pressing control unit (109) presses the pressing roller (62) from the second position (P2) against the electrode sheet (10).

Description

TECHNICAL FIELD

[0001] The present application relates to an electrode sheet manufacturing apparatus. BACKGROUND

[0002] For example, a method of manufacturing an electrode is disclosed in Japanese Patent Application Publication No. 2023-36089, which is configured to press an uncoated portion of a precursor sheet (in other words, an electrode sheet) having a metal foil, a coated portion in which an electrode material is coated on the metal foil, and an uncoated portion in which the electrode material is not coated on the metal foil, by a pair of elastic rollers (in other words, rubber rollers).

[0003] For example, if the uncoated portion is pressed by rollers other than elastic rollers, a void can be generated inside the uncoated portion due to a tensile force or the like. The uncoated portion can be broken due to the void. The uncoated portion is pressed by the pair of elastic rollers, whereby a compressive force and a deformation force can be applied to the same portion of the uncoated portion. The compressive force is a force generated by the pair of elastic rollers being in contact and the elastic rollers being deformed. Thus, the uncoated portion can be stretched while suppressing breakage of the uncoated portion.

[0004] Patent Document 1: Japanese Patent Application Publication No. 2023-36089

[0005] In addition, in the method of manufacturing an electrode disclosed in Japanese Patent Application Publication No. 2023-36089, if the state in which the elastic rollers are pressed against the precursor sheet is maintained, a portion of the elastic rollers that is pressed can be locally deformed. If the locally deformed elastic rollers rotate to press the uncoated portion, a difference can be generated in the degree of stretching of the uncoated portion. SUMMARY

[0006] The electrode sheet manufacturing apparatus disclosed herein is an electrode sheet manufacturing apparatus that manufactures an electrode sheet having: a current collector composed of a long metal foil; an unformed portion provided at a predetermined position in the width direction of the current collector along the length direction; and an electrode active material layer formed on a portion of the current collector other than the unformed portion and containing an electrode active material. The electrode sheet manufacturing apparatus has: a conveyance apparatus that conveys the electrode sheet along a predetermined conveyance path; a support roller disposed on the conveyance path and supporting a first surface of the electrode sheet conveyed along the conveyance path in the width direction; a pressing roller disposed on a second surface of the electrode sheet opposite the support roller; a drive apparatus that pushes the pressing roller toward the support roller with the electrode sheet interposed therebetween; and a control apparatus. The pressing roller is a rubber roller having at least an outer peripheral surface composed of rubber and is disposed so as to sandwich the unformed portion between the pressing roller and the support roller in the electrode sheet other than the electrode active material layer. The drive apparatus has a moving mechanism and a pressing mechanism. The moving mechanism moves the pressing roller between a first position at which the pressing roller is distanced from the electrode sheet and a second position at which the pressing roller contacts the electrode sheet. The pressing mechanism pushes the pressing roller toward the electrode sheet from the second position. The control apparatus has a moving control portion, a conveyance control portion, and a pressing control portion. The moving control portion moves the pressing roller from the first position toward the second position before the conveyance of the electrode sheet by the conveyance apparatus is started. After the pressing roller is moved to the second position by the moving control portion, the conveyance control portion conveys the electrode sheet along the support roller. The pressing control portion pushes the pressing roller toward the electrode sheet from the second position at the time when the conveyance of the electrode sheet by the conveyance control portion is started or after a predetermined reference time elapses from the time when the conveyance of the electrode sheet by the conveyance control portion is started.

[0007] According to the electrode sheet manufacturing apparatus disclosed herein, the conveyance of the electrode sheet is started after the pressing roller is disposed at the second position. Also, the pressing roller is pushed toward the electrode sheet from the second position at the time when the conveyance of the electrode sheet is started or after a reference time elapses from the time when the conveyance of the electrode sheet is started. Thus, the timing at which the pressing roller is pushed toward the electrode sheet from the second position can be delayed, and thus the pressing roller is less likely to be locally deformed. Therefore, the unformed portion of the electrode sheet can be pressed using a pressing roller and a support roller that are less likely to be locally deformed, and thus the unformed portion is easily uniformly stretched. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 is a flowchart of manufacturing by the electrode sheet manufacturing apparatus.

[0009] Figure 2 is a schematic view of an electrode sheet.

[0010] Figure 3 is a schematic side view of an electrode sheet manufacturing apparatus.

[0011] Figure 4 is a front view of a roll press.

[0012] Figure 5 is a sectional view of A-A section of Figure 4

[0013] Figure 6 is a view corresponding to Figure 5 representing a state in which the pressing roll is disposed at the first position.

[0014] Figure 7 is a view corresponding to Figure 5 representing a state in which the pressing roll is disposed at the second position and the pressing cylinder is stopped.

[0015] Figure 8 is a block diagram of an electrode sheet manufacturing apparatus.

[0016] Figure 9 is a flowchart representing the order of pre-treatment.

[0017] BRIEF DESCRIPTION OF DRAWINGS

[0018] 1... electrode sheet manufacturing apparatus; 10... electrode sheet; 10D... first surface; 10U... second surface; 12... current collector; 12a... uncoated portion (unformed portion); 14... electrode active material layer; 15... conveyance apparatus; 18... conveyance path; 61... support roll; 62... pressing roll; 65... drive apparatus; 68... moving mechanism; 70... pressing mechanism; 71... pressing cylinder; 74... rotating mechanism; 100... control apparatus; 105... moving control section; 107... conveyance control section; 109... pressing control section; PI... first position; P2... second position; Tl... waiting time; T2... reference time; VI... first load value; V2... second load value. DETAILED DESCRIPTION

[0019] One embodiment of the technology disclosed herein will be described below with reference to the accompanying drawings. Note that the embodiment described herein is not intended to particularly limit the present application. Each of the drawings is a schematic view and does not necessarily accurately reflect an actual implementation component. In addition, the same reference numerals are given to components and parts that have the same function, and repetitive description is appropriately omitted.

[0020] Figure 1 is a flowchart based on the manufacturing of the electrode sheet manufacturing apparatus 1. As Figure 1 ​As shown, the manufacturing process in electrode sheet manufacturing apparatus 1 includes a transport process S1, a metering process S2, a mixing process S3, a coating process S4, a drying process S5, and a rolling process S6. However, the manufacturing process in electrode sheet manufacturing apparatus 1 may also include other processes.

[0021] In electrode manufacturing apparatus 1, electrode sheets 10 constituting an energy storage device are manufactured (see reference). Figure 2 The electrode sheet 10 has a positive or negative electrode sheet housed within the electrode body of the energy storage device. An energy storage device refers to a device capable of repeated charging and discharging; it encompasses not only batteries (i.e., chemical batteries) such as lithium-ion secondary batteries, nickel-metal hydride batteries, and nickel-cadmium batteries, but also capacitors (i.e., physical batteries) such as electric double-layer capacitors. Hereinafter, as an example, the electrode sheet manufacturing apparatus 1 for manufacturing the electrode sheet 10 will be described in conjunction with the structure of the electrode sheet 10 used in a lithium-ion secondary battery.

[0022] Figure 2 This is a schematic diagram of electrode plate 10. (As shown...) Figure 2 As shown, the electrode sheet 10 is a long strip-shaped electrode sheet. The electrode sheet 10 includes a current collector 12 and an electrode active material layer 14. The current collector 12 is a component made of metal foil. The current collector 12 is a long strip-shaped metal component. As the current collector 12, a metal material with the required conductivity can be used. As an example of the positive electrode current collector foil of the current collector 12, aluminum, aluminum alloy, etc., can be used, for example. As another example of the negative electrode current collector foil of the current collector 12, copper, copper alloy, etc., can be used, for example. The electrode active material layer 14 is applied to a predetermined position in the current collector 12. The electrode active material layer 14 is formed on at least one side of the strip-shaped current collector 12. In this embodiment, the electrode active material layer 14 is formed on both sides of the current collector 12. The electrode active material layer 14 is a layer containing electrode active material. As an example of the electrode active material, i.e., the positive electrode active material, lithium transition metal composite oxide can be used, for example. Another example of an electrode active material, namely a negative electrode active material, is that carbon materials, silicon-based materials, and their mixed oxides can be used. The electrode active material layer may also include additives other than the electrode active material, such as binders and conductive materials.

[0023] The electrode sheet 10 is formed by applying to the current collector 12 a slurry of an electrode composite material that becomes the electrode active material layer 14 and drying it. The current collector 12 has an uncoated portion 12a and a coated portion 12b. The uncoated portion 12a is an example of an unformed portion. The uncoated portion 12a is a portion of the current collector 12 that is not coated with the electrode active material layer 14. The uncoated portion 12a is provided at a predetermined position in the width direction of the current collector 12 along the length direction. The uncoated portion 12a is provided at an end portion in the width direction of the electrode sheet 10 along the length direction. In the present embodiment, the uncoated portion 12a is provided at both ends in the width direction of the electrode sheet 10. The coated portion 12b is disposed between the uncoated portions 12a at both ends of the electrode sheet 10. The coated portion 12b is a portion of the current collector 12 that is coated with the electrode active material layer 14. The electrode composite material slurry is applied to the coated portion 12b. Thus, the electrode active material layer 14 is formed on the coated portion 12b of the current collector 12. That is, the electrode active material layer 14 is disposed between the uncoated portions 12a at both ends in the width direction of the electrode sheet 10. The electrode active material layer 14 is formed on a portion of the current collector 12 other than the uncoated portion 12a. Furthermore, although not shown, a protective layer including an inorganic filler can be provided at the boundary between the uncoated portion 12a and the coated portion 12b. When a rubber roller of an EPS is pressed in a state in which the protective layer is formed, there can be a case in which the elongation is not uniform at a portion on which the protective layer is formed and a portion on which the protective layer is not formed.

[0024] In Figure 1 The electrode sheet 10 is carried in the carrying process S1. Figure 3 is a schematic side view of the electrode sheet manufacturing apparatus 1. In the present embodiment, the electrode sheet manufacturing apparatus 1 is provided with a carrying apparatus 15. The carrying process S1 can be implemented by the carrying apparatus 15. The carrying apparatus 15 carries the electrode sheet 10. The carrying apparatus 15 uses, for example, a motor. The carrying apparatus 15 is provided with a roll-out roller 15a and a roll-up roller 15b so that the electrode sheet 10 can be carried at a predetermined carrying speed. The electrode sheet 10 is wound around the roll-out roller 15a and the roll-up roller 15b. The roll-out roller 15a is disposed on the upstream side in the carrying direction of the roll press 60 described later. The roll-up roller 15b is disposed on the downstream side in the carrying direction of the roll press 60. However, the carrying apparatus 15 is not limited to a structure provided with the roll-out roller 15a and the roll-up roller 15b. For example, the carrying apparatus 15 can be provided with a roller in addition to the roll-out roller 15a and the roll-up roller 15b. The electrode sheet 10 is carried along a predetermined carrying path 18 by the carrying apparatus 15.

[0025] In Figure 1 The electrode active material layer 14 is measured in the measuring process S2. Figure 2The raw materials are mixed. This measurement can be achieved, for example, using a balance or a metering device (not shown) with a pressure measuring element. The metered raw materials for the electrode active material layer 14 are mixed in the mixing step S3. The mixing step S3 can be performed using a mixing device (not shown). In the coating step S4, the raw materials for the electrode active material layer 14, which have become a slurry through the mixing device, are coated onto the current collector 12 (see reference). Figure 2 For example, coating process S4 can be achieved using coating devices such as slot coaters, gravure coaters, die coaters, and comma coaters (not shown). Figure 1 In the drying process S5 shown, the raw material of the coated slurry-like electrode active material layer 14 is dried. For example, the drying process S5 is achieved by a drying device (not shown) that emits hot air or infrared rays.

[0026] exist Figure 1 In the rolling process S6 shown, the electrode sheet 10 is pressurized. The electrode sheet 10 is extended by being pressed. It can be extended by... Figure 3 The roller press 60 shown is used to perform the rolling process S6. The electrode sheet manufacturing apparatus 1 includes the roller press 60. Figure 3 As shown, the electrode sheet 10 is pressurized by the roller press 60 midway through the transport path 18. The electrode sheet 10 is supplied to the roller press 60 via the take-up roller 15a. The electrode sheet 10, after being pressurized by the roller press 60, is transported toward the take-up roller 15b and is wound up by the take-up roller 15b. The electrode sheet manufacturing apparatus 1 includes a control device 100 for controlling the take-up roller 15a, the take-up roller 15b, and the roller press 60.

[0027] Figure 4 This is a front view of the roller press 60. Here, the roller press 60 according to this embodiment is a device that applies pressure to the uncoated portion 12a of the electrode sheet 10 via a rubber roller before or after the coating portion 12b of the pressure electrode sheet 10. When the uncoated portion 12a is pressed by the rubber roller, it is subjected to the reaction force of the elastic deformation and compressive deformation of the rubber roller, and the portion squeezed by the rubber roller is pressed and stretched. As a result, it is possible to extend the uncoated portion 12a while suppressing breakage. Based on this function, the device for applying pressure to the uncoated portion 12a of the electrode sheet 10 via a rubber roller can be appropriately called an elasticity-powered stretching (EPS) device. Furthermore, in addition to the roller press 60, the electrode sheet manufacturing apparatus 1 may also include a device for applying pressure to the coating portion 12b.

[0028] like Figure 4 As shown, the roller press 60 includes a support roller 61, a pressing roller 62, and a drive device 65.

[0029] Support roller 61 is disposed in transport path 18 (see reference) Figure 3). The support roller 61 supports the first surface 10D of the electrode sheet 10 carried along the carrying path 18 in the width direction of the electrode sheet 10. The electrode sheet 10 has the first surface 10D and a second surface 10U. In the present embodiment, the first surface 10D constitutes a lower surface of the electrode sheet 10. The second surface 10U is a surface of the electrode sheet 10 on the side opposite to the first surface 10D. Here, the second surface 10U constitutes an upper surface of the electrode sheet 10. The support roller 61 is disposed below the pressing roller 62. The support roller 61 is a rubber roller that presses the uncoated portion 12a of the electrode sheet 10 together with the pressing roller 62. In the present embodiment, the support roller 61 has a main body portion 61a and two shaft portions 61b.

[0030] Figure 5 is a cross-sectional view of A-A section of Figure 4 . Further, in Figure 5 , a state in which the uncoated portion 12a is being pressed by the support roller 61 and the pressing roller 62 is shown. In addition, in Figure 5 , a state in which the pressing roller 62 is disposed at the second position P2 and the pressing cylinder 71 (refer to Figure 4 ) described later is activated is shown. As shown in Figure 5 , the main body portion 61a has a shaft portion 61aa and a rubber portion 61ab. The shaft portion 61aa is made of metal. The material forming the shaft portion 61aa is not particularly limited, but is, for example, a material having a relatively high hardness such as SUS304 (stainless steel material). The rubber portion 61ab is disposed so as to cover at least an outer peripheral surface in the shaft portion 61aa. The material forming the rubber portion 61ab is, for example, nitrile rubber (NBR). The support roller 61 presses the uncoated portion 12a of the electrode sheet 10 by the rubber portion 61ab.

[0031] The support roller 61 is rotated in a prescribed direction by the rotation mechanism 74 (refer to Figure 4 ) described later. In the present embodiment, the support roller 61 is rotated in the direction of the arrow R1 shown in Figure 5 . At this time, the electrode sheet 10 is carried from the left toward the right when the drawing surface of Figure 5 is viewed. That is, in Figure 5 , the left is the upstream side in the carrying direction and the right is the downstream side in the carrying direction.

[0032] As shown in Figure 4 , the two shaft portions 61b are inserted into the main body portion 61a. The two shaft portions 61b are inserted into the shaft portion 61aa (refer to Figure 5 ) of the main body portion 61a. The two shaft portions 61b extend to the outside in the axial direction of the support roller 61. Further, although not shown, a bearing, a gap screw that adjusts the gap of the support roller 61 and the pressing roller 62, or the like can be installed in the two shaft portions 61b.

[0033] As shown in Figure 5As shown, the extrusion roller 62 is a component that pushes (in other words, presses) the electrode sheet 10 against the support roller 61. The extrusion roller 62 is disposed opposite to the support roller 61 on the second surface 10U (here, the upper surface) of the electrode sheet 10. The extrusion roller 62 is configured to exclude the coating portion 12b in the electrode sheet 10 (see reference). Figure 2 The uncoated portion 12a is held between the extrusion roller 62 and the support roller 61. Here, the axial center of the extrusion roller 62 is aligned vertically with the axial center of the support roller 61. Figure 4 As shown, the extrusion roller 62 is a rubber roller whose outer peripheral surface is at least made of rubber. The extrusion roller 62, together with the support roller 61, presses down on the uncoated portion 12a of the electrode sheet 10. The extrusion roller 62 is not positioned above the coated portion 12b of the electrode sheet 10. In this embodiment, as described above, the uncoated portions 12a of the electrode sheet 10 are located at both ends in the width direction of the electrode sheet 10, and there are two of them. Therefore, as... Figure 4 As shown, the extrusion rollers 62 are respectively disposed above the uncoated portions 12a at both ends of the electrode sheet 10 in the width direction. There are two extrusion rollers 62. However, there may be only one uncoated portion 12a, and in the case of only one uncoated portion 12a, there may also be only one extrusion roller 62. Of the two extrusion rollers 62, the extrusion roller disposed on the left is referred to as extrusion roller 62L, and the extrusion roller disposed on the right is referred to as extrusion roller 62R. However, in the context of describing either extrusion roller 62L or 62R, the name extrusion roller 62 is appropriately used. In this embodiment, the extrusion roller 62 includes a main body portion 62a and two shaft portions 62b.

[0034] like Figure 5 As shown, the main body 62a includes a shaft portion 62aa and a rubber portion 62ab. The shaft portion 62aa is made of metal. The material forming the shaft portion 62aa is not particularly limited, but it can be, for example, a material with relatively high hardness such as SUS304 (stainless steel). The rubber portion 62ab is configured to cover at least the outer peripheral surface of the shaft portion 62aa. The material forming the rubber portion 62ab is not particularly limited, but it can be, for example, nitrile rubber (NBR). The extrusion roller 62 applies pressure to the uncoated portion 12a of the electrode sheet 10 through the rubber portion 62ab.

[0035] like Figure 4 As shown, two shaft portions 62b are inserted into the main body portion 62a. The two shaft portions 62b are inserted into the shaft portion 62aa of the main body portion 62a (see reference). Figure 5 The two shaft portions 62b extend to the outer side of the two extrusion rollers 62 in the axial direction. In addition, although not shown in the figure, the two shaft portions 62b are equipped with bearings, gap screws for adjusting the gap between the support roller 61 and the extrusion roller 62, etc.

[0036] like Figure 5As shown, when the support roller 61 and the pressing roller 62 sandwich the electrode sheet 10, and the support roller 61 rotates in the direction of the arrow R1, the pressing roller 62 receives a force to rotate in the direction of the arrow R2 via the electrode sheet 10. Alternatively, when the support roller 61 and the pressing roller 62 are in contact without the electrode sheet 10 being arranged, the pressing roller 62 receives a force to rotate in the direction of the arrow R2 by the rotation of the support roller 61. Thus, the pressing roller 62 rotates in the direction of the arrow R2. That is, the pressing roller 62 is a driven roller that rotates driven by the rotation of the support roller 61.

[0037] The driving device 65 is a device that sandwiches the electrode sheet 10 to press the pressing roller 62 against the support roller 61. Here, as shown in FIG. 6, the driving device 65 includes a moving mechanism 68 and a pressing mechanism 70. Figure 4

[0038] Figure 6 FIG. 6 is a view that shows a state in which the pressing roller 62 is arranged at the first position P1. The moving mechanism 68 is a mechanism that moves the pressing roller 62 to the first position P1 (see FIG. 5) and the second position P2 (see FIG. 7). Figure 5 Figure 6 Figure 5 Figure 6 Figure 5 Figure 4

[0039] As shown in FIG. 7, the pressing mechanism 70 is a mechanism that moves the pressing roller 62 in the direction of the arrow R2. The pressing mechanism 70 is a mechanism that moves the pressing roller 62 in the vertical direction. The pressing mechanism 70 is not particularly limited in configuration, and can be configured integrally with the moving mechanism 68 and the like described later, or can be implemented by the pressing cylinder 71 described later. For example, the pressing mechanism 70 can be configured such that the pressing roller 62 moves along the rod 71a of the pressing cylinder 71 described later. Figure 4 ​​​​​​​As shown, the pressurizing mechanism 70 is a mechanism that pushes the extrusion roller 62 against the electrode plate 10, i.e., applies pressure. The pressurizing mechanism 70 is a mechanism for adjusting the force (i.e., the pressure) applied by the extrusion roller 62 to the electrode plate 10. The pressurizing mechanism 70 includes a pressurizing cylinder 71, a roller clamp 72, and a cylinder drive device 73.

[0040] The pressure cylinder 71 presses the extrusion roller 62 against the support roller 61. One pressure cylinder 71 is positioned on each side of the extrusion roller 62, slightly outwards from both ends. Here, in... Figure 4 In this embodiment, the pressure cylinder 71 located to the left of the electrode plate 10 is referred to as pressure cylinder 71L, and the pressure cylinder 71 located to the right of the electrode plate 10 is referred to as pressure cylinder 71R. However, when explaining the common aspects of pressure cylinders 71L and 71R, it is also referred to as pressure cylinder 71. In this embodiment, pressure cylinder 71 is a pneumatic cylinder. Pressure cylinder 71 includes a rod 71a. Rod 71a is connected to roller clamp 72. Roller clamp 72 is a component that supports the two shaft portions 62b of the extrusion roller 62 so that they can rotate. If pressure cylinder 71 is driven and rod 71a descends, extrusion roller 62 descends. As extrusion roller 62 descends, it is pressed against support roller 61, and the pressure increases. If pressure cylinder 71 is driven and rod 71a rises, extrusion roller 62 rises. As extrusion roller 62 rises, the pressure decreases.

[0041] The cylinder drive device 73 is a device that pushes the extrusion roller 62 toward the support roller 61. The cylinder drive device 73 is connected to the pressure cylinder 71. The cylinder drive device 73 drives the pressure cylinder 71. As a result, the rod 71a of the pressure cylinder 71 rises and falls. In this embodiment, the cylinder drive device 73 is configured to drive the pressure cylinder 71L and the pressure cylinder 71R independently. That is, it independently drives the extrusion roller 62 located above the uncoated portions 12a at both ends of the width direction of the electrode sheet 10. The cylinder drive device 73 and the control device 100 (see reference) Figure 3 )connect.

[0042] In this embodiment, the pressure cylinder 71 is configured to be switchable between start and stop via the cylinder drive device 73. When the pressure cylinder 71 is stopped, the cylinder drive device 73 is not driven, and the pressure cylinder 71 does not push the extrusion roller 62 against the electrode plate 10. When the pressure cylinder 71 is started, the cylinder drive device 73 is driven, and the pressure cylinder 71 and the cylinder drive device 73 push the extrusion roller 62 against the electrode plate 10.

[0043] Figure 7 This indicates that the extrusion roller 62 is positioned at the second position P2 and the pressure cylinder 71 is stopped. Figure 5 The diagram shows that when the extrusion roller 62 is in position P2, the start and stop of the pressure cylinder 71 are switched. Figure 7As shown, for example, when the pressing roller 62 is in the second position P2 and the pressing cylinder 71 is stopped, the pressing roller 62 is not pressed against the electrode sheet 10 by the pressing cylinder 71, but becomes a state in which the electrode sheet 10 is placed on the support roller 61. At this time, the pressing roller 62 can become a state in which the pressing roller 62 is slightly pressed against the electrode sheet 10 by the weight. Here, when the pressing roller 62 is in the second position P2 and the pressing cylinder 71 is stopped, the pressing roller 62 is pressed against the electrode sheet 10 by a first load value V1 which is decided in advance. The specific value of the first load value V1 is not particularly limited, but for example, the first load value is 800 N or less.

[0044] As shown, for example, when the pressing roller 62 is in the second position P2 and the pressing cylinder 71 is stopped, the pressing roller 62 is not pressed against the electrode sheet 10 by the pressing cylinder 71, but becomes a state in which the electrode sheet 10 is placed on the support roller 61. At this time, the pressing roller 62 can become a state in which the pressing roller 62 is slightly pressed against the electrode sheet 10 by the weight. Here, when the pressing roller 62 is in the second position P2 and the pressing cylinder 71 is stopped, the pressing roller 62 is pressed against the electrode sheet 10 by a first load value V1 which is decided in advance. The specific value of the first load value V1 is not particularly limited, but for example, the first load value is 800 N or less. Figure 5 As shown, for example, when the pressing roller 62 is in the second position P2 and the pressing cylinder 71 is stopped, the pressing roller 62 is not pressed against the electrode sheet 10 by the pressing cylinder 71, but becomes a state in which the electrode sheet 10 is placed on the support roller 61. At this time, the pressing roller 62 can become a state in which the pressing roller 62 is slightly pressed against the electrode sheet 10 by the weight. Here, when the pressing roller 62 is in the second position P2 and the pressing cylinder 71 is stopped, the pressing roller 62 is pressed against the electrode sheet 10 by a first load value V1 which is decided in advance. The specific value of the first load value V1 is not particularly limited, but for example, the first load value is 800 N or less.

[0045] In the present embodiment, as shown in Figure 4 , the electrode sheet manufacturing apparatus 1 is provided with a rotating mechanism 74 and a support portion 75. The rotating mechanism 74 is a mechanism that rotates the support roller 61. The rotating mechanism 74 is connected to the support roller 61. In the present embodiment, the rotating mechanism 74 rotates the support roller 61 in the direction of the arrow R1 shown in Figure 5 . However, the rotating mechanism 74 can rotate the support roller 61 in the direction opposite to the arrow R1. The structure of the rotating mechanism 74 is not particularly limited, but for example, is constituted by an electric motor, a gear, or the like. The rotating mechanism 74 is connected to the control device 100 (refer to Figure 3 ).

[0046] The support portion 75 is a member that supports the support roller 61. The support portion 75 supports the two shaft portions 61b of the support roller 61.

[0047] As described above, Figure 3The control device 100 shown controls the roll press 60. The structure of the control device 100 is not particularly limited. The control device 100 is, for example, a microcomputer. The hardware configuration of the microcomputer is not particularly limited, but, for example, has an I / F, a CPU, a ROM, a RAM, and a storage device. Figure 8 is a block diagram of the electrode sheet manufacturing device 1. As shown in Figure 8 The control device 100 is communicably connected to, for example, the carrying device 15, the moving mechanism 68, the pressure applying mechanism 70 (in detail, the cylinder driving device 73), and the rotating mechanism 74. The control device 100 controls the carrying device 15, the moving mechanism 68, the pressure applying mechanism 70, and the rotating mechanism 74.

[0048] The electrode sheet manufacturing device 1 according to the present embodiment has been described above. As described above, the extrusion roller 62 is a rubber roller in which at least the outer peripheral surface is formed of rubber. Therefore, as shown in Figure 5 When the extrusion roller 62 is pressed against the electrode sheet 10, the outer peripheral surface of the extrusion roller 62 is easily deformed. In particular, the portion of the outer peripheral surface of the extrusion roller 62 that is pressed against the electrode sheet 10 can be deformed. The deformed portion of the extrusion roller 62 can be flattened along the shape of the electrode sheet 10. If the extrusion roller 62 is not rotated and the state of being pressed against the electrode sheet 10 is maintained for a long time, the deformed portion of the extrusion roller 62 can become permanent deformation. In this state of partial deformation (for example, permanent deformation), the extrusion roller 62 is rotated to press against the electrode sheet 10 in an attempt to extend the uncoated portion 12a of the electrode sheet 10, and the uncoated portion 12a can not be uniformly extended. For example, the portion of the uncoated portion 12a that is pressed by the deformed portion of the extrusion roller 62 can be extended less than the portion of the uncoated portion 12a that is pressed by the portion of the extrusion roller 62 that is not deformed. As a result, it can be difficult to uniformly extend the uncoated portion 12a of the electrode sheet 10.

[0049] In addition, if the extrusion roller 62 is not rotated and the state of being pressed against the electrode sheet 10 is maintained for a long time, the portion of the extrusion roller 62 that is pressed can be permanently deformed, and, in conjunction therewith, the uncoated portion 12a of the electrode sheet 10 can be excessively extended. As a result, the uncoated portion 12a of the electrode sheet 10 that is excessively extended can be broken.

[0050] In addition, if the extrusion roller 62 is brought into contact with the electrode sheet 10 while the support roller 61 is rotated by the rotating mechanism 74, and the electrode sheet 10 is attempted to be gripped, the uncoated portion 12a can not be properly extended (for example, broken) due to the difference in rotational speed between the support roller 61 and the extrusion roller 62.

[0051] Therefore, in the present embodiment, before the uncoated portion 12a of the electrode sheet 10 is extended, the control of the pre-process decided in advance is performed by the control device 100 so as to make the uncoated portion 12a extend as uniformly as possible. In the present embodiment, as shown in FIG. 1, the control device 100 is provided with a storage section 101, a tension adjustment section 103, a movement control section 105, a conveyance control section 107, a press control section 109, and an extension control section 111. Further, each section of the control device 100 can be realized by one or a plurality of processors, or can be realized by a circuit. Figure 8

[0052] Next, the pre-process performed before the uncoated portion 12a of the electrode sheet 10 is extended by the roll press 60 will be described with reference to the flowchart of FIG. 2. Figure 9 Figure 6 As shown in FIG. 2, the pre-process is started when the electrode sheet 10 is supported by the support roller 61 and the press roller 62 is at the first position Pl. At the start of the pre-process, the press roller 62 is in a state of being separated from the electrode sheet 10 above without contacting the electrode sheet 10 supported by the support roller 61. In addition, at the start of the pre-process, the conveyance device 15 is not driven and the electrode sheet 10 is not conveyed.

[0053] In the pre-process, first, in step S101 of FIG. 3, Figure 9 the tension adjustment section 103 of the control device 100 adjusts the tension of the electrode sheet 10. Here, the tension adjustment section 103 adjusts the tension of the electrode sheet 10 supported by the support roller 61. As shown in FIG. 4, the electrode sheet 10 supported by the support roller 61 is placed on the unwind roller 15a and the wind-up roller 15b of the conveyance device 15. Therefore, the tension adjustment section 103 adjusts the tension of the electrode sheet 10 between the unwind roller 15a and the wind-up roller 15b. Here, the tension adjustment section 103 controls the conveyance device 15 (for example, the rotation of the unwind roller 15a or the wind-up roller 15b) so that the tension of the electrode sheet 10 becomes a reference tension decided in advance. The reference tension is the tension of the electrode sheet 10 when the uncoated portion 12a is pressed by the roll press 60. The reference tension is a value stored in advance in the storage section 101 of the control device 100. Further, when the tension of the electrode sheet 10 is adjusted by the tension adjustment section 103, the electrode sheet 10 is not pinched by the support roller 61 and the press roller 62. At this time, the press roller 62 is disposed at a position higher than the electrode sheet 10 and is separated from the electrode sheet 10. Figure 8 Figure 3 Figure 8

[0054] Next, in step S102 of FIG. 3, Figure 9 the movement control section 105 of the control device 100 moves the press roller 62 (here, both the press rollers 62L and 62R) to the second position P2 (see FIG. 1). At this time, the press roller 62 is moved to the second position P2 while being separated from the electrode sheet 10. In addition, the movement control section 105 moves the press roller 62 to the second position P2 while the conveyance device 15 is not driven and the electrode sheet 10 is not conveyed. Figure 8 Figure 7 ​​​​​​(Movement). In step S102, the electrode sheet 10 supported on the support roller 61 is in a state where the tension is set to a reference tension and it is not being moved. Additionally, before performing step S102, as... Figure 6 As shown, the extrusion roller 62 is positioned at the first position P1. Before the electrode sheet 10 is transported by the transport device 15, the movement control unit 105 moves the extrusion roller 62 from the first position P1 toward the second position P2. Here, as... Figure 7 As shown, the movement control unit 105 controls the movement mechanism 68 to lower the extrusion roller 62, thereby moving it to the second position P2. Furthermore, when moving the extrusion roller 62 to the second position P2, the movement control unit 105 stops the pressure cylinder 71, i.e., it does not drive the cylinder drive device 73. The movement control unit 105 stops the pressure cylinder 71 when the extrusion roller 62 reaches the second position P2. Additionally, the movement control unit 105 applies a first load value V1 (refer to...) at the second position P2. Figure 7 The extrusion roller 62 is moved to the second position P2 by pressing the extrusion roller 62 against the electrode plate 10.

[0055] Thus, when the extrusion roller 62 moves to the second position P2 via the movement control unit 105, the extrusion roller 62 is in a state where it contacts the second surface 10U of the electrode sheet 10, but is placed on the electrode sheet 10 due to its own weight. At this time, the extrusion roller 62 becomes a state where it pushes the electrode sheet 10 with the first load value V1 due to its own weight.

[0056] Next, in Figure 9 In step S103, Figure 8 The transport control unit 107 transports the electrode sheet 10 along the support roller 61. Here, as... Figure 7 As shown, with the extrusion roller 62 positioned at the second position P2 and the pressure cylinder 71 stopped, the transport control unit 107 begins transporting the electrode sheet 10 downstream in the transport path 18. Here, the transport control unit 107 controls the transport device 15 (see reference 107) to move the electrode sheet 10 downstream. Figure 3 The electrode sheet 10 is transported by controlling the rotation mechanism 74 and rotating the support roller 61 in the direction of arrow R1. In this embodiment, in step S103, the pressure roller 62 is pressed against the electrode sheet 10 by its own weight. Therefore, when transporting the electrode sheet 10, the rotation of the pressure roller 62 and the support roller 61 is passively rotated in the direction of arrow R2. At this time, the rotational speed of the support roller 61 is the same as the rotational speed of the pressure roller 62.

[0057] Furthermore, in this embodiment, for the transport control unit 107, after the extrusion roller 62 is moved to the second position P2 by the movement control unit 105, a predetermined waiting time T1 (refer to...) is elapsed. Figure 8When the electrode sheet 10 is being transported along the support roller 61, the waiting time T1 is pre-stored in the storage unit 101 (see reference 101). Figure 8 The value of the waiting time T1 is not specifically limited, but it can be anywhere from 0.1 seconds to 10 seconds.

[0058] After the electrode sheet 10 is moved in this way, the following steps are performed. Figure 9 Step S104. In step S104, as follows: Figure 5 As shown, Figure 8 The extrusion control unit 109 presses the extrusion roller 62 against the electrode sheet 10. Here, the extrusion control unit 109 presses the extrusion roller 62 against the electrode sheet 10 from the second position P2. Specifically, the extrusion control unit 109 drives the cylinder drive device 73 to start the pressure cylinder 71 from a stop position. As a result, the extrusion roller 62 descends and can be pressed against the electrode sheet 10 with a second load value V2.

[0059] Furthermore, in this embodiment, the extrusion control unit 109 controls the movement of the electrode sheet 10 by the transport control unit 107 for a predetermined reference time T2 (refer to...). Figure 8 At position P2, the extrusion roller 62 is pressed against the electrode sheet 10. This reference time T2 is pre-stored. Figure 8 The storage unit 101. The specific value of the reference time T2 is not particularly limited, but the reference time T2 is, for example, 3 seconds or less, preferably 1 second or less. The reference time T2 is, for example, 0.1 seconds. The reference time T2 can also be set according to the rotational speed of the extrusion roller 62. For example, the reference time T2 can also be the time it takes for the extrusion roller 62 to rotate one revolution when the electrode sheet 10 is transported by the conveying device 15.

[0060] Furthermore, the reference time T2 can also be 0. When the reference time T2 is 0, when the transport control unit 107 begins to transport the electrode sheet 10, the extrusion control unit 109 pushes the extrusion roller 62 onto the electrode sheet 10 from the second position P2. In this way, the timing of the transport control unit 107 starting to transport the electrode sheet 10 and the timing of the extrusion control unit 109 starting to push the extrusion roller 62 onto the electrode sheet 10 can also be the same.

[0061] Perform preprocessing as described above. After performing preprocessing, Figure 8 The extension control section 111 extends the uncoated portion 12a of the electrode sheet 10 by applying pressure through the roller press 60. Here, as... Figure 5 As shown, the extension control unit 111 activates the pressure cylinder 71 to push the extrusion roller 62 against the electrode sheet 10 with a second load value V2, and controls the conveying device 15 (see reference). Figure 3 ) and rotating mechanism 74, causing electrode sheet 10 to move along transport path 18 (refer to Figure 3) downstream. Thus, the uncoated portion 12a of the electrode sheet 10 is extended by pressing it with the second load value V2 in a state where it is gripped by the support roller 61 and the pressing roller 62.

[0062] In the present embodiment, the electrode sheet manufacturing apparatus 1 is a manufacturing apparatus that manufactures the electrode sheet 10. As shown in Figure 2 , the electrode sheet 10 has a current collector 12 composed of a long metal foil, an uncoated portion 12a provided at a predetermined position in the width direction of the current collector 12 in the length direction, and an electrode active material layer 14 formed at a portion other than the uncoated portion 12a of the current collector 12 and containing an electrode active material. As shown in Figure 3 and Figure 4 , the electrode sheet manufacturing apparatus 1 includes a conveyance apparatus 15, a support roller 61, a pressing roller 62, a drive apparatus 65, and a control apparatus 100. The conveyance apparatus 15 conveys the long electrode sheet 10 along a predetermined conveyance path 18. The support roller 61 is disposed on the conveyance path 18 and supports a first surface 10D of the electrode sheet 10 conveyed along the conveyance path 18 in the width direction. The pressing roller 62 is disposed on a second surface 10U of the electrode sheet 10 in opposition to the support roller 61. The drive apparatus 65 pushes the pressing roller 62 toward the support roller 61 with the electrode sheet 10 interposed therebetween. As shown in Figure 5 , the pressing roller 62 is a rubber roller whose at least an outer peripheral surface is formed of rubber, and is disposed so as to sandwich the uncoated portion 12a between the pressing roller 62 and the support roller 61 in the electrode sheet 10 other than the electrode active material layer 14. As shown in Figure 4 , the drive apparatus 65 includes a moving mechanism 68 and a pressing mechanism 70. The moving mechanism 68 moves the pressing roller 62 between a first position PI (see Figure 6 ) at which the pressing roller 62 is distanced from the electrode sheet 10, and a second position P2 (see Figure 7 ) at which the pressing roller 62 contacts the electrode sheet 10. As shown in Figure 5 , the pressing mechanism 70 pushes the pressing roller 62 against the electrode sheet 10 from the second position P2. As shown in Figure 8 , the control apparatus 100 includes a moving control section 105, a conveyance control section 107, and a pressing control section 109. As in step S102 of Figure 9 , the moving control section 105 moves the pressing roller 62 from the first position PI toward the second position P2 before starting the conveyance of the electrode sheet 10 by the conveyance apparatus 15. The conveyance control section 107 conveys the electrode sheet 10 along the support roller 61 after the pressing roller 62 is moved to the second position P2 by the moving control section 105, as in step S103 of Figure 9 . When a predetermined reference time T2 (see Figure 8 ) elapses after starting the conveyance of the electrode sheet 10 by the conveyance control section 107, the pressing control section 109 starts the pressing of the electrode sheet 10 by the pressing mechanism 70, as in step S104 ofFigure 9 The pressing control section 109 pushes the pressing roller 62 against the electrode sheet 10 from the second position P2 as in step S104. Alternatively, the pressing control section 109 can push the pressing roller 62 against the electrode sheet 10 from the second position P2 when the conveyance control section 107 starts to convey the electrode sheet 10.

[0063] According to the present embodiment, as shown in Figure 7 the conveyance of the electrode sheet 10 is started. Also, when the conveyance of the electrode sheet 10 is started, or when a reference time T2 elapses after the conveyance of the electrode sheet 10 is started, the pressing roller 62 is pushed against the electrode sheet 10 from the second position P2 as shown in Figure 5 Thus, the timing at which the pressing roller 62 is pushed against the electrode sheet 10 from the second position P2 can be delayed, so that the pressing roller 62 is less likely to be locally deformed. Therefore, the uncoated portion 12a of the electrode sheet 10 can be pressed using the pressing roller 62 and the support roller 61 that are less likely to be locally deformed, so that the uncoated portion 12a is easily and uniformly stretched.

[0064] In the present embodiment, as shown in Figure 7 the pressing roller 62 is moved to the second position P2 so as to push the pressing roller 62 against the electrode sheet 10 at the second position P2 at a first load value Vl that is predetermined. The pressing control section 109 pushes the pressing roller 62 against the electrode sheet 10 at a second load value V2 (see Figure 5 ) that is greater than the first load value Vl. Thus, the pressure at which the pressing roller 62 is pushed against the electrode sheet 10 when the pressing roller 62 is moved from the first position Pl to the second position P2 by the movement control section 105 can be reduced. Therefore, the pressing roller 62 is less likely to be locally deformed at the second position P2.

[0065] In the present embodiment, as shown in Figure 4 the pressing mechanism 70 has a pressing cylinder 71 that pushes the pressing roller 62 against the electrode sheet 10 by being activated. After the pressing roller 62 is moved to the second position P2, the movement control section 105 stops the pressing cylinder 71. The pressing control section 109 pushes the pressing roller 62 against the electrode sheet 10 from the second position P2 by activating the pressing cylinder 71 as shown in Figure 5 Thus, by switching the pressing cylinder 71 from the stopped state to the activated state, the timing at which the pressing roller 62 is pushed against the electrode sheet 10 from the second position P2 can be controlled.

[0066] In the present embodiment, as shown in Figure 4 the electrode sheet manufacturing apparatus 1 is provided with a rotation mechanism 74 that rotates the support roller 61. As shown in Figure 7As shown, the carrying control section 107 starts the carrying of the electrode sheet 10 along the support roller 61 by rotating the support roller 61. In this way, when the electrode sheet 10 is carried, the squeeze roller 62 is easily rotated in a driven manner based on the rotation of the support roller 61 by rotating the support roller 61. Thus, the portion of the electrode sheet 10 that is pushed by the squeeze roller 62 can be changed by the rotation of the squeeze roller 62, and thus the squeeze roller 62 can be made less likely to be locally deformed.

[0067] In the present embodiment, the carrying control section 107 carries the electrode sheet 10 along the support roller 61 after the squeeze roller 62 is moved to the second position P2 by the movement control section 105 and a predetermined waiting time Tl (see FIG. 6) elapses. Figure 8 For example, if the squeeze roller 62 carries the electrode sheet 10 at the same time as when the squeeze roller 62 is moved to the second position P2, or if the squeeze roller 62 carries the electrode sheet 10 before the squeeze roller 62 is moved to the second position P2, when the squeeze roller 62 contacts the uncoated portion 12a of the electrode sheet 10, it is easy to apply pressure to the current collector 12 that is exposed at the uncoated portion 12a, and thus a wrinkle or the like can be formed and deformation can occur. However, as in the present embodiment, the electrode sheet 10 is carried after the squeeze roller 62 is moved to the second position P2 and the waiting time Tl elapses, and thus the carrying of the electrode sheet 10 can be started after the squeeze roller 62 contacts the uncoated portion 12a. Thus, it is relatively difficult to apply pressure to the uncoated portion 12a from the squeeze roller 62, and thus the uncoated portion 12a can be made less likely to be deformed.

[0068] In the above-described embodiment, the squeeze roller 62 is disposed above the support roller 61. However, the squeeze roller 62 can also be disposed below the support roller 61. In this case, the squeeze roller 62 can also be configured to sandwich the electrode sheet 10 with the support roller 61 by rising. In this case, the first face of the electrode sheet 10 that is supported by the support roller 61 becomes the upper surface of the electrode sheet 10. The second face of the electrode sheet 10 that is contacted by the squeeze roller 62 becomes the lower surface of the electrode sheet 10.

[0069] The above describes various aspects of the invention disclosed herein. The embodiments and the like described herein are not limiting of the invention unless specifically mentioned. In addition, the embodiments of the invention disclosed herein can be variously changed, and each of the constituent elements and the processes mentioned herein can be appropriately omitted or appropriately combined without causing particular problems.

[0070] As described above, in the present specification, the disclosure described in each of the following items is included.

[0071] Item 1: An electrode sheet manufacturing apparatus that is a manufacturing apparatus that manufactures an electrode sheet having: a current collector composed of a long metal foil; an unformed portion provided at a position decided in advance in a width direction of the current collector along a length direction; and an electrode active material layer formed at a portion other than the unformed portion of the current collector and containing an electrode active material, wherein the electrode sheet manufacturing apparatus includes: a conveyance apparatus that conveys the electrode sheet along a decided conveyance path; a support roller disposed at the conveyance path and supporting a first face of the electrode sheet conveyed along the conveyance path in the width direction; a pressing roller disposed at a second face of the electrode sheet opposite the support roller; a drive apparatus that pushes the pressing roller toward the support roller with the electrode sheet interposed therebetween; and a control apparatus, the pressing roller being a rubber roller having at least an outer peripheral surface formed of rubber and configured to sandwich the unformed portion of the electrode sheet other than the electrode active material layer between the pressing roller and the support roller, the drive apparatus including: a moving mechanism that moves the pressing roller between a first position at which the pressing roller is distanced from the electrode sheet and a second position at which the pressing roller contacts the electrode sheet; and a pressing mechanism that pushes the pressing roller toward the electrode sheet from the second position, the control apparatus including: a moving control portion that moves the pressing roller from the first position toward the second position before starting conveyance of the electrode sheet by the conveyance apparatus; a conveyance control portion that conveys the electrode sheet along the support roller after moving the pressing roller to the second position by the moving control portion; and a pressing control portion that pushes the pressing roller toward the electrode sheet from the second position at a time of starting conveyance of the electrode sheet by the conveyance control portion or at a time of elapsing of a decided reference time after starting conveyance of the electrode sheet by the conveyance control portion.

[0072] Item 2: The electrode sheet manufacturing apparatus according to item 1, wherein the moving control portion moves the pressing roller to the second position so as to push the pressing roller toward the electrode sheet at the second position at a decided first load value, and the pressing control portion pushes the pressing roller toward the electrode sheet at a second load value greater than the first load value.

[0073] Item 3: The electrode sheet manufacturing apparatus according to item 1 or 2, wherein the pressing mechanism has a pressing cylinder that pushes the pressing roller toward the electrode sheet by activation, the moving control portion stops the pressing cylinder after moving the pressing roller to the second position, and the pressing control portion pushes the pressing roller toward the electrode sheet from the second position by activating the pressing cylinder.

[0074] Item 4: The electrode sheet manufacturing apparatus according to any one of items 1 to 3, wherein the pressing control section pushes the pressing roller against the electrode sheet from the second position when a reference time elapses after the start of the conveyance of the electrode sheet by the conveyance control section.

[0075] Item 5: The electrode sheet manufacturing apparatus according to any one of items 1 to 4, wherein a rotation mechanism that rotates the support roller is provided, and the conveyance control section starts the conveyance of the electrode sheet along the support roller by rotating the support roller.

[0076] Item 6: The electrode sheet manufacturing apparatus according to any one of items 1 to 5, wherein the conveyance control section conveys the electrode sheet along the support roller when a predetermined waiting time elapses after the pressing roller is moved to the second position by the movement control section.

Claims

1. An electrode sheet manufacturing apparatus that is a manufacturing apparatus that manufactures an electrode sheet having: a current collector composed of a long metal foil; an unformed portion that is provided at a position decided in advance in a width direction in the current collector along a length direction; and an electrode active material layer that is formed at a portion other than the unformed portion in the current collector and contains an electrode active material, the electrode sheet manufacturing apparatus comprising: a conveyance apparatus that conveys the electrode sheet along a conveyance path decided in advance; a support roller that is disposed at the conveyance path and supports a first face of the electrode sheet conveyed along the conveyance path in a width direction; a pressing roller that is disposed at a second face of the electrode sheet in opposition to the support roller; a drive apparatus that pushes the pressing roller toward the support roller with the electrode sheet interposed therebetween; and a control apparatus, the pressing roller being a rubber roller of which at least an outer peripheral surface is formed of rubber and being disposed so as to sandwich the unformed portion between the pressing roller and the support roller in the electrode sheet other than the electrode active material layer, the drive apparatus comprising: a moving mechanism that moves the pressing roller between a first position at which the pressing roller is distanced from the electrode sheet and a second position at which the pressing roller contacts the electrode sheet; and a pressing mechanism that pushes the pressing roller toward the electrode sheet from the second position, the control apparatus comprising: a moving control portion that moves the pressing roller from the first position toward the second position before starting conveyance of the electrode sheet by the conveyance apparatus; a conveyance control portion that conveys the electrode sheet along the support roller after moving the pressing roller to the second position by the moving control portion; and a pressing control portion that pushes the pressing roller toward the electrode sheet from the second position at a time of starting conveyance of the electrode sheet by the conveyance control portion or at a time of elapsing of a reference time decided in advance after starting conveyance of the electrode sheet by the conveyance control portion. wherein 2. The electrode sheet manufacturing apparatus according to claim 1, wherein the moving control portion moves the pressing roller to the second position so as to push the pressing roller toward the electrode sheet at the second position at a first load value decided in advance, and the pressing control portion pushes the pressing roller toward the electrode sheet at a second load value that is greater than the first load value.

3. The electrode sheet manufacturing apparatus according to claim 1 or 2, wherein the pressing mechanism has a pressing cylinder that pushes the pressing roller toward the electrode sheet by activation, the moving control portion stops the pressing cylinder at a time of moving the pressing roller to the second position, and the pressing control portion pushes the pressing roller toward the electrode sheet from the second position by activating the pressing cylinder.

4. The electrode sheet manufacturing apparatus according to any one of claims 1 to 3, wherein the pressing control portion pushes the pressing roller toward the electrode sheet from the second position at a time of elapsing of the reference time after starting conveyance of the electrode sheet by the conveyance control portion. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 5. The electrode sheet manufacturing apparatus according to any one of claims 1 to 4, wherein a rotation mechanism that rotates the support roller is provided, the carrying control section starts carrying the electrode sheet along the support roller by rotating the support roller.

6. The electrode sheet manufacturing apparatus according to any one of claims 1 to 5, wherein after the extrusion roller is moved to the second position by the movement control section, the carrying control section carries the electrode sheet along the support roller when a predetermined waiting time elapses.

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