Manufacturing device for mixture plate

Abstract

A device (1) for manufacturing a mixture plate (S) is provided with: a first molding roller (4) and a second molding roller (6) for compressing a granular dry electrode mixture (P) into a plate shape and molding the mixture plate (S), the second molding roller (6) supporting and conveying the mixture plate (S) on a peripheral surface (6b); and a first extension roller (8) which is disposed so that the distance (G1) between the first extension roller (8) and the second forming roller (6) is smaller than the thickness (T1) of the mixture plate (S) supported by the second forming roller (6), and which extends the mixture plate (S). The first forming roller (4), the second forming roller (6), and the first extension roller (8) are positioned so as to extend in a direction in which an imaginary line (L1) passing through the rotation axis (4a) of the first forming roller (4) and the rotation axis (6a) of the second forming roller (6) intersects with an imaginary line (L2) passing through the rotation axis (6a) of the second forming roller (6) and the rotation axis (8a) of the first extension roller (8).

Description

Technical Field

[0001] The present invention relates to a manufacturing device for a composite plate. Background Art

[0002] Patent Document 1 describes a multi-roller system used for manufacturing dry electrodes. The system includes a plurality of rollers arranged in a row, wherein a dry electrode mixture is supplied from a powder hopper to a gap between a pair of rollers to form a mixture plate, and the mixture plate is extended while being supported on the circumference of each roller.

[0003] [Prior art literature]

[0004] [Patent Document]

[0005] Patent Document 1: U.S. Patent Application Publication No. 2020 / 0227722 Summary of the invention

[0006] [Problems to be solved by the invention]

[0007] The present inventors have conducted intensive studies on a manufacturing apparatus for a composite plate, and have found that there is room for improvement in the quality of the composite plate in the existing apparatus.

[0008] The present disclosure has been made in view of such circumstances, and an object of the present disclosure is to provide a technology for improving the quality of a mixed plate.

[0009] [Technical solutions for solving technical problems]

[0010] One scheme of the present disclosure is a manufacturing device for a composite plate. The device includes: a first forming roller and a second forming roller, which are adjacent to each other at a predetermined interval, and compress the granular dry electrode mixture supplied to the gap between the two rollers into a plate shape to form a composite plate, and the second forming roller supports and conveys the composite plate on the circumferential surface; and a first stretching roller, which is configured so that the interval with the second forming roller is smaller than the thickness of the composite plate supported by the circumferential surface of the second forming roller, and extends the composite plate passing through the gap with the second forming roller. The first forming roller, the second forming roller, and the first stretching roller are determined in a relative position in a manner that they extend in a direction that intersects a virtual line passing through the rotation axis of the first forming roller and the rotation axis of the second forming roller and a virtual line passing through the rotation axis of the second forming roller and the rotation axis of the first stretching roller.

[0011] Another scheme of the present disclosure is a manufacturing device for a composite plate. The device includes: a third stretching roller and a fourth stretching roller, which are adjacent to each other at a predetermined interval, so that a composite plate composed of a granular dry electrode composite passes through and extends from the gap between the two rollers, and the fourth stretching roller supports and conveys the composite plate on the circumferential surface; and a fifth stretching roller, which is configured to have a smaller interval with the fourth stretching roller than the thickness of the composite plate supported by the circumferential surface of the fourth stretching roller, and allows the composite plate to pass through the gap with the fourth stretching roller. The third stretching roller, the fourth stretching roller, and the fifth stretching roller are determined in a relative position in a manner that they extend in a direction in which a virtual line passing through the rotation axis of the third stretching roller and the rotation axis of the fourth stretching roller intersects with a virtual line passing through the rotation axis of the fourth stretching roller and the rotation axis of the fifth stretching roller.

[0012] Optional combinations of the above-described constituent elements and conversions of the expressions of the present disclosure into methods, apparatuses, systems, and the like are also effective as aspects of the present disclosure.

[0013] Effects of the Invention

[0014] According to the present disclosure, it is possible to improve the quality of the mixture plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of a manufacturing apparatus for a mixed plate according to the first embodiment.

[0016] Figure 2 It is a schematic diagram of the manufacturing apparatus of the mixture plate of Embodiment 2.

[0017] Figure 3 (A) is a schematic diagram of a manufacturing apparatus for a mixed plate according to Modification 1. Figure 3 (B) is a schematic diagram of a manufacturing apparatus for a composite plate according to Modification 2. DETAILED DESCRIPTION

[0018] Hereinafter, with reference to the accompanying drawings, the present disclosure will be described based on a preferred embodiment. The embodiments do not limit the present disclosure, but are merely illustrative, and all the features and combinations described in the embodiments are not the substantive contents of the present disclosure. The same or equivalent components, members, and processes shown in the drawings are marked with the same figure numerals, and repeated descriptions are appropriately omitted. In addition, the scales or shapes of the various parts shown in the figures are set for ease of description and are not to be interpreted restrictively unless otherwise specified. In addition, when the terms "first", "second", etc. are used in this specification or claims, unless otherwise specified, the terms do not indicate any order or importance, and are only used to distinguish a certain structure from other structures. In addition, in each of the drawings, a part of the components that are not important in describing the embodiments will be omitted from display.

[0019] (Implementation Method 1)

[0020] Figure 1 It is a schematic diagram of the manufacturing device 1 of the composite plate s of embodiment 1. The manufacturing device 1 of the composite plate s includes a storage section 2, a first forming roller 4, a second forming roller 6, and a first stretching roller 8. The storage section 2 has a known structure such as a combination of a hopper and a feeder, and stores a granular (powdered) dry electrode mixture P which is a raw material of the composite plate S. The average particle size of the dry electrode mixture P is, for example, not less than 5 μm and not more than 50 μm. In the present disclosure, the average particle size means the particle size at the cumulative value of 50% in the particle size distribution obtained by laser diffraction and scattering method.

[0021] The dry electrode mixture P contains an electrode active material and, if necessary, contains a conductive agent, a binding material (binder) and a solvent. In the case of a general lithium-ion secondary battery, the electrode active material is lithium cobalt oxide or lithium iron phosphate when it is a positive electrode, and graphite when it is a negative electrode. In addition, the conductive agent is graphite, carbon black, acetylene black, etc. The binding material is polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVdF), etc. Regarding the solvent, when the dry electrode mixture P is used for the negative electrode, examples include water, alcohols such as ethanol, N-methylpyrrolidone (NMP), toluene, dimethyl carbonate (DMC), ethyl methyl carbonate (EMC), etc. In addition, regarding the solvent, when the dry electrode mixture P is used for the positive electrode, examples include: amine solvents such as N, N-dimethylaminopropylamine and diethylenetriamine; ether solvents such as tetrahydrofuran; ketone solvents such as methyl ethyl ketone; ester solvents such as methyl acetate; amide solvents such as dimethylacetamide and N-methyl-2-pyrrolidone. Regarding the dry electrode mixture P, the total content of the binder and the content of the solvent is 10% by mass or less, or 5% by mass or less, or 3% by mass or less, or 0.1% by mass, or substantially 0% relative to the total mass of the dry electrode mixture P. Therefore, the drying furnace of the mixture plate S can be omitted.

[0022] The first forming roller 4 and the second forming roller 6 are arranged at the powder outlet of the storage section 2. The first forming roller 4 and the second forming roller 6 are positioned so that their respective rotation axes 4a, 6a are parallel to each other and are adjacent to each other at a predetermined interval. The second forming roller 6 is arranged on the downstream side of the conveying direction of the mixture plate S than the first forming roller 4. The dry electrode mixture P is supplied from the storage section 2 to the gap between the first forming roller 4 and the second forming roller 6. As an example, the first forming roller 4 and the second forming roller 6 also function as feed rollers of a feeder, and the dry electrode mixture P in the storage section 2 is placed on the peripheral surface 4b of the first forming roller 4 and the peripheral surface 6b of the second forming roller 6 to be supplied to the gap between the two forming rollers.

[0023] The first forming roller 4 and the second forming roller 6 rotate in opposite directions to each other, and compress the dry electrode mixture P supplied to the gap into a plate shape. Thus, the mixture plate S is formed. The mixture plate S is continuously fed out from the gap between the first forming roller 4 and the second forming roller 6. Therefore, the mixture plate S is in the form of a long belt in the conveying direction. The mixture plate S is conveyed to the downstream side while being supported by the peripheral surface 6b of the second forming roller 6.

[0024] The first stretching roller 8 is arranged on the downstream side of the conveying direction of the composite sheet S than the second forming roller 6. The first stretching roller 8 is positioned so that the rotation axis 8a is parallel to the rotation axis 6a of the second forming roller 6, and is adjacent to the second forming roller 6 at a predetermined interval. The second forming roller 6 and the first stretching roller 8 can rotate in opposite directions to each other by sandwiching the composite sheet S, thereby conveying the composite sheet S to the downstream side. The composite sheet S supported by the peripheral surface 6b of the second forming roller 6 passes through the gap between the second forming roller 6 and the first stretching roller 8, and is delivered to the peripheral surface 8b of the first stretching roller 8. Then, it is supported on the peripheral surface 8b and conveyed to the downstream side. With regard to the composite sheet S being conveyed, the state of contact with the peripheral surface 6b of the second forming roller 6 and the peripheral surface 8b of the first stretching roller 8 is always maintained.

[0025] The first stretching roller 8 is configured such that the interval G1 (the size of the gap) with the second forming roller 6 is smaller than the thickness T1 of the composite sheet S supported by the peripheral surface 6b of the second forming roller 6. Therefore, the composite sheet S is stretched in the process of passing through the gap between the second forming roller 6 and the first stretching roller 8. In this configuration, the second forming roller 6 can also be interpreted as functioning as a stretching roller. The thickness T1 of the composite sheet S supported by the peripheral surface 6b, in other words, the thickness of the composite sheet S located on the downstream side of the gap between the two forming rollers and on the upstream side of the gap between the second forming roller 6 and the first stretching roller 8 is, for example, 300 μm or more. When the thickness of the composite sheet S is 300 μm or more, when the composite sheet S passes through the gap between the second forming roller 6 and the first stretching roller 8, the displacement of the two rollers described later is likely to occur.

[0026] In addition, the manufacturing device 1 may also have one or more stretching rollers on the downstream side of the first stretching roller 8. In addition, the stretching of the composite sheet S caused by the difference in rotation speed between the first stretching roller 8 and the second forming roller 6 can also be combined. As an example, after the composite sheet S is stretched to a target thickness, it is stacked on a collector plate (not shown). Then, it is monolithicized into a plurality of electrode plates and used in a storage device such as a secondary battery or a capacitor. The target thickness of the composite sheet S is, for example, less than 200 μm.

[0027] As described above, the gap G1 between the second forming roller 6 and the first stretching roller 8 is smaller than the thickness T1 of the composite sheet S that enters the gap between the two rollers. Therefore, when the composite sheet S passes through the gap between the second forming roller 6 and the first stretching roller 8, a force in the direction of separating the two rollers is applied to the two rollers. As a result, the second forming roller 6 and the first stretching roller 8 may be slightly displaced in the direction of separating from each other.

[0028] As in Figure 1 As shown by the virtual line in FIG, when the first forming roller 4, the second forming roller 6 and the first stretching roller 8 are arranged on the same straight line in this order, when the second forming roller 6 and the first stretching roller 8 are displaced in the direction of separation from each other, the second forming roller 6 will approach the first forming roller 4. As a result, the gap between the first forming roller 4 and the second forming roller 6 will become narrower, and the thickness of the formed composite sheet S may become uneven. In addition, when the gap is too narrow, the composite sheet S may break. As a result, the quality of the composite sheet S may be reduced.

[0029] Furthermore, at the downstream side of the first stretching roll 8, when the second stretching roll 10 is arranged on the same straight line as other rolls, when the second forming roll 6 and the first stretching roll 8 are displaced in a direction away from each other, the first stretching roll 8 comes close to the second stretching roll 10. As a result, the gap between the first stretching roll 8 and the second stretching roll 10 becomes narrower, and the thickness of the composite sheet S may become uneven. In addition, the composite sheet S may be excessively rolled, and the composite sheet S may be broken. As a result, the quality of the composite sheet S may be reduced.

[0030] The composite plate S is composed of a dry electrode composite P. The dry electrode composite P has a lower content of solvent and binder than the wet electrode composite. In addition, the dry electrode composite P may contain hard metal oxides. Furthermore, with respect to the composite plate S, the target thickness is extremely thin, being less than 200 μm. Therefore, the composite plate S is difficult to elastically deform even when subjected to external force. Therefore, the displacement of the second forming roller 6 and the first stretching roller 8 will greatly affect the thickness of the composite plate S, and due to the displacement, uneven thickness or breakage is likely to occur.

[0031] In contrast, in the manufacturing apparatus 1 of the present embodiment, the arrangement of the first forming roll 4, the second forming roll 6, and the first stretching roll 8 is determined as follows. That is, the positional relationship between these three rolls is determined in such a manner that a virtual line L1 passing through the rotation axis 4a of the first forming roll 4 and the rotation axis 6a of the second forming roll 6 and a virtual line L2 passing through the rotation axis 6a of the second forming roll 6 and the rotation axis 8a of the first stretching roll 8 extend in directions intersecting each other.

[0032] Thus, the direction in which the second forming roller 6 is displaced can be deviated from the direction approaching the first forming roller 4. Therefore, it is possible to suppress the narrowing of the gap between the first forming roller 4 and the second forming roller 6 due to the displacement of the second forming roller 6. Therefore, it is possible to suppress the unevenness of the thickness of the composite sheet S and the breakage of the composite sheet S, and to seek to improve the quality of the composite sheet S. In addition, for example, in a case where the first stretching roller 8 and the second stretching roller 10 are arranged parallel to the virtual line L1, it is possible to deviate the direction in which the first stretching roller 8 is displaced from the direction approaching the second stretching roller 10. Therefore, it is possible to suppress the narrowing of the gap between the first stretching roller 8 and the second stretching roller 10 due to the displacement of the first stretching roller 8. Therefore, it is possible to suppress the unevenness of the thickness of the composite sheet S and the breakage of the composite sheet S, and to seek to improve the quality of the composite sheet S. In addition, the diameters of the first stretching roller 8 and the second stretching roller 10 may be the same or different.

[0033] When the angle θ1 formed by the virtual line L1 and the virtual line L2 when the first forming roll 4, the second forming roll 6 and the first stretching roll 8 are arranged in this order on the same straight line is set to 0°, it is preferred that the angle θ1 formed by the two virtual lines L1 and L2 is 45° or more. In this way, the narrowing of the gap between the two forming rolls and the gap between the two stretching rolls can be further suppressed. More preferably, the angle θ1 formed by the two virtual lines L1 and L2 is 90°. In this way, the narrowing of the gap between the two forming rolls and the gap between the two stretching rolls can be further suppressed. In addition, the upper limit of the angle θ1 is determined to be a value at which the first forming roll 4 and the first stretching roll 8 do not interfere with each other.

[0034] (Implementation Method 2)

[0035] Except that the two forming rolls and one stretching roll in Embodiment 1 are replaced by three stretching rolls, the manufacturing device 1 of this embodiment also has the same structure as Embodiment 1. Hereinafter, the manufacturing device 1 of this embodiment will be described mainly with respect to the structure different from Embodiment 1, and the common structure will be briefly described or omitted.

[0036] Figure 2 It is a schematic diagram of a manufacturing device 1 for a composite plate S of Embodiment 2. The manufacturing device 1 for the composite plate S includes a third stretching roller 12, a fourth stretching roller 14, and a fifth stretching roller 16. The third stretching roller 12 and the fourth stretching roller 14 are positioned so that their respective rotation axes 12a, 14a are parallel to each other, and are adjacent to each other at a predetermined interval. The fourth stretching roller 14 is arranged on the downstream side of the conveying direction of the composite plate S than the third stretching roller 12. The composite plate S composed of a granular dry electrode composite P is supplied to the gap between the third stretching roller 12 and the fourth stretching roller 14. The composite plate S is formed, for example, by the same method as Embodiment 1.

[0037] The third stretching roller 12 and the fourth stretching roller 14 rotate in opposite directions to each other, and convey the composite sheet S supplied to the gap to the downstream side. The composite sheet S is conveyed to the downstream side while being supported by the peripheral surface 14b of the fourth stretching roller 14. The third stretching roller 12 and the fourth stretching roller 14 are configured such that the gap G2 between the two rollers is smaller than the thickness T2 of the composite sheet S supplied to the gap between the two rollers. Therefore, the composite sheet S is stretched while passing through the gap between the third stretching roller 12 and the fourth stretching roller 14.

[0038] The fifth stretching roller 16 is arranged on the downstream side of the conveying direction of the composite sheet S than the fourth stretching roller 14. The fifth stretching roller 16 is positioned so that the rotation axis 16a is parallel to the rotation axis 14a of the fourth stretching roller 14, and is adjacent to the fourth stretching roller 14 at a predetermined interval. The fourth stretching roller 14 and the fifth stretching roller 16 rotate in opposite directions to each other while sandwiching the composite sheet S, thereby conveying the composite sheet S to the downstream side. The composite sheet S supported by the peripheral surface 14b of the fourth stretching roller 14 passes through the gap between the fourth stretching roller 14 and the fifth stretching roller 16, and is delivered to the peripheral surface 16b of the fifth stretching roller 16. Then, it is supported by the peripheral surface 16b and conveyed to the downstream side. With regard to the composite sheet S being conveyed, the state of contact with the peripheral surface 14b of the fourth stretching roller 14 and the peripheral surface 16b of the fifth stretching roller 16 is always maintained. In addition, in the present embodiment, the mixed sheet S is also supported by the peripheral surface 12 b of the third stretching roll 12 .

[0039] The fifth stretching roller 16 is arranged such that the interval G3 with the fourth stretching roller 14 is smaller than the thickness T3 of the mixed sheet S supported by the peripheral surface 14 b of the fourth stretching roller 14 . Therefore, the mixed sheet S is stretched while passing through the gap between the fourth stretching roller 14 and the fifth stretching roller 16 .

[0040] In addition, the manufacturing device 1 may include one or more stretching rollers on the downstream side of the fifth stretching roller 16. In addition, the stretching of the composite sheet S caused by the rotation speed difference between the fifth stretching roller 16 and the fourth stretching roller 14 may be combined. In addition, the stretching of the composite sheet S caused by the third stretching roller 12 and the fourth stretching roller 14 may be performed only by the rotation speed difference between the two rollers.

[0041] As described above, the gap G3 between the fourth stretching roller 14 and the fifth stretching roller 16 is smaller than the thickness T3 of the composite sheet S that enters the gap between the two rollers. Therefore, when the composite sheet S passes through the gap between the fourth stretching roller 14 and the fifth stretching roller 16, a force in a direction of separation is applied to the two rollers. As a result, the fourth stretching roller 14 and the fifth stretching roller 16 may be slightly displaced in a direction of separation from each other.

[0042] As in Figure 2As shown by the virtual line in FIG, when the third stretching roller 12 to the fifth stretching roller 16 are arranged in this order on the same straight line, when the fourth stretching roller 14 and the fifth stretching roller 16 are displaced in the direction of being separated from each other, the fourth stretching roller 14 approaches the third stretching roller 12. As a result, the gap between the third stretching roller 12 and the fourth stretching roller 14 becomes narrower, and the thickness of the composite sheet S may become uneven or the composite sheet S may be broken. As a result, the quality of the composite sheet S may be reduced.

[0043] Furthermore, at the downstream side of the fifth stretching roller 16, when the sixth stretching roller 18 is arranged on the same straight line as the other rollers, when the fourth stretching roller 14 and the fifth stretching roller 16 are displaced in the direction of being separated from each other, the fifth stretching roller 16 approaches the sixth stretching roller 18. As a result, the gap between the fifth stretching roller 16 and the sixth stretching roller 18 becomes narrower, and the thickness of the composite sheet S may become uneven or the composite sheet S may be broken. As a result, the quality of the composite sheet S may be degraded.

[0044] In contrast, in the manufacturing apparatus 1 of the present embodiment, the arrangement of the third stretching roller 12, the fourth stretching roller 14, and the fifth stretching roller 16 is determined as follows. That is, the three rollers are determined in a positional relationship with each other in such a manner that they extend in a direction in which a virtual line L3 passing through the rotation axis 12a of the third stretching roller 12 and the rotation axis 14a of the fourth stretching roller 14 and a virtual line L4 passing through the rotation axis 14a of the fourth stretching roller 14 and the rotation axis 16a of the fifth stretching roller 16 intersect each other.

[0045] Thus, it is possible to suppress the narrowing of the gap between the third stretching roller 12 and the fourth stretching roller 14 due to the displacement of the fourth stretching roller 14. Therefore, it is possible to suppress the unevenness of the thickness of the composite sheet S and the breakage of the composite sheet S, and to seek to improve the quality of the composite sheet S. In addition, for example, when the fifth stretching roller 16 and the sixth stretching roller 18 are arranged parallel to the virtual line L3, it is possible to suppress the narrowing of the gap between the fifth stretching roller 16 and the sixth stretching roller 18 due to the displacement of the fifth stretching roller 16. Therefore, it is possible to suppress the unevenness of the thickness of the composite sheet S and the breakage of the composite sheet S, and to seek to improve the quality of the composite sheet S. In addition, the diameters of the third stretching rollers 12 to the sixth stretching rollers 18 may be the same or different.

[0046] When the angle θ2 formed by the virtual line L3 and the virtual line L4 when the third stretching roller 12, the fourth stretching roller 14 and the fifth stretching roller 16 are arranged in this order on the same straight line is set to 0°, it is preferable that the angle θ2 formed by the two virtual lines L3 and L4 is 45° or more, and more preferably 90°, as in Embodiment 1. In addition, the upper limit of the angle θ2 is determined to be a value at which the third stretching roller 12 and the fifth stretching roller 16 do not interfere with each other.

[0047] The above is a detailed description of the embodiments of the present disclosure. The aforementioned embodiments do not merely represent specific examples when implementing the present disclosure. The contents of the embodiments do not limit the technical scope of the present disclosure, and various design changes such as changes, additions, and deletions of constituent elements can be made without departing from the scope of the disclosed ideas specified in the claims. The new embodiment with design changes has the effects of the combined embodiments and the deformations. In the aforementioned embodiments, the contents that can be subjected to such design changes are emphasized by adding "in this embodiment", "in this embodiment", etc., but design changes are allowed even in the absence of such records. Any combination of constituent elements included in each embodiment is also valid as a scheme of the present disclosure. The shadows attached to the cross-sections of the accompanying drawings do not limit the material of the objects with shadows.

[0048] (Variant 1)

[0049] Figure 3 (A) is a schematic diagram of a manufacturing device 1 for a composite plate S of variant example 1. In the manufacturing device 1 of embodiment 1, the storage unit 2 supplies the dry electrode mixture P from above in the vertical direction to the gap between the first forming roller 4 and the second forming roller 6. However, the supply direction of the dry electrode mixture P is not limited to this scheme. For example, as in the manufacturing device 1 of variant example 1, the first forming roller 4 and the second forming roller 6 may be arranged vertically, and the storage unit 2 supplies the dry electrode mixture P from the horizontal direction to the gap between the two forming rollers.

[0050] (Variant 2)

[0051] Figure 3 (B) is a schematic diagram of a manufacturing device 1 for a composite plate S of variant example 2. The manufacturing device 1 of variant example 2 is provided with a laminating mechanism in the manufacturing device 1 of each embodiment. Hereinafter, as an example, a case where a laminating mechanism is provided in the manufacturing device 1 of embodiment 1 is described. That is, the manufacturing device 1 includes a laminating roller 20 adjacent to the first stretching roller 8 at a predetermined interval. The laminating roller 20 transports a substrate B such as a collector plate while supporting it with a peripheral surface 20b. As the substrate B, a metal foil such as aluminum foil or copper foil can be exemplified.

[0052] The substrate B supported by the circumferential surface 20b of the laminating roller 20 and the composite plate S supported by the circumferential surface 8b of the first stretching roller 8 are supplied to the gap between the first stretching roller 8 and the laminating roller 20. And, the composite plate S and the substrate B are pressed against each other by the two rollers. Thus, the composite plate S is laminated on the substrate B to obtain a continuum of the electrode plate. Preferably, the laminating roller 20 is configured to extend along a virtual line L2 in a direction intersecting with virtual lines passing through the rotation axis 8a of the first stretching roller 8 and the rotation axis of the laminating roller 20.

[0053] The embodiment can also be determined by the items described below.

[0054] [Item 1]

[0055] A manufacturing device (1) for a composite plate (S) comprises: a first forming roller (4) and a second forming roller (6) which are adjacent to each other at a predetermined interval and compress a granular dry electrode composite (P) supplied to the gap between the two rollers into a plate shape to form a composite plate (S); the second forming roller (6) supports and conveys the composite plate (S) on a peripheral surface (6b); and

[0056] a first stretching roller (8) configured such that a gap (G1) between the first stretching roller (8) and the second forming roller (6) is smaller than a thickness (T1) of a composite sheet (S) supported by a peripheral surface (6b) of the second forming roller (6), and stretching the composite sheet (S) passing through the gap between the first stretching roller (8) and the second forming roller (6);

[0057] The first forming roller (4), the second forming roller (6) and the first stretching roller (8) are positioned relative to each other in such a manner that a virtual line (L1) passing through the rotation axis (4a) of the first forming roller (4) and the rotation axis (6b) of the second forming roller (6) and a virtual line (L2) passing through the rotation axis (6a) of the second forming roller (6) and the rotation axis (8a) of the first stretching roller (8) extend in a direction intersecting each other.

[0058] [Item 2]

[0059] A manufacturing device (1) for a composite plate (S), comprising: a third stretching roller (12) and a fourth stretching roller (14), which are adjacent to each other at a predetermined interval, and allow a composite plate (S) composed of a granular dry electrode composite (P) to pass through the gap between the two rollers and stretch; the fourth stretching roller (14) supports and conveys the composite plate (S) on a peripheral surface (14b); and

[0060] a fifth stretching roller (16) configured such that a gap (G3) between the fifth stretching roller (16) and the fourth stretching roller (14) is smaller than a thickness (T3) of a composite sheet (S) supported by a peripheral surface (14b) of the fourth stretching roller (14), and stretches the composite sheet (S) passing through the gap between the fifth stretching roller (16) and the fourth stretching roller (14);

[0061] The third stretching roller (12), the fourth stretching roller (14) and the fifth stretching roller (16) are positioned relative to each other in such a manner that they extend in directions intersecting a virtual line (L3) passing through a rotation axis (12a) of the third stretching roller (12) and a rotation axis (14a) of the fourth stretching roller (14) and a virtual line (L4) passing through a rotation axis (14a) of the fourth stretching roller (14) and a rotation axis (16a) of the fifth stretching roller (16).

[0062] [Item 3]

[0063] The manufacturing device (1) according to item 1 or 2, wherein the angle (θ1, θ2) formed by the two virtual lines (L1, L2, L3, L4) is 45° or more.

[0064] [Item 4]

[0065] The manufacturing device according to any one of items 1 to 3, wherein the angle (θ1, θ2) formed by the two virtual lines (L1, L2, L3, L4) is 90°.

[0066] [Industrial Applicability]

[0067] The present disclosure can be used in a manufacturing apparatus for a mixed plate.

[0068] [Explanation of Reference Numerals]

[0069] 1 manufacturing apparatus, 4 1st forming roller, 4a, 6a, 8a, 12a, 14a, 16a rotating shaft, 6 2nd forming roller, 6b, 8b, 14b, 16b peripheral surface, 8 1st stretching roller, 12 3rd stretching roller, 14 4th stretching roller, 16 5th stretching roller, G1, G3 interval, L1, L2, L3, L4 virtual line, P dry electrode mixture, S mixture plate, T1, T3 thickness.

Claims

1. A device for manufacturing a composite plate, comprising: a first forming roller and a second forming roller, which are adjacent to each other at a predetermined interval, and compress the granular dry electrode mixture supplied to the gap between the two rollers into a plate shape to form a mixture plate, and the second forming roller supports and conveys the mixture plate on its circumferential surface, and a first stretching roller arranged so that the interval between the first stretching roller and the second forming roller is smaller than the thickness of the mixture sheet supported by the peripheral surface of the second forming roller and stretching the mixture sheet passing through the interval between the first stretching roller and the second forming roller; The first forming roll, the second forming roll, and the first stretching roll are positioned relative to each other in such a manner that they extend in a direction in which a virtual line passing through the rotation axis of the first forming roll and the rotation axis of the second forming roll and a virtual line passing through the rotation axis of the second forming roll and the rotation axis of the first stretching roll intersect each other.

2. A device for manufacturing a composite plate, comprising: a third stretching roller and a fourth stretching roller, which are adjacent to each other at a predetermined interval, and allow a mixture plate composed of a granular dry electrode mixture to pass through a gap between the two rollers and stretch, and the fourth stretching roller supports and conveys the mixture plate on its circumferential surface, and a fifth stretching roller arranged so that a gap between the fifth stretching roller and the fourth stretching roller is smaller than a thickness of the mixture sheet supported by the peripheral surface of the fourth stretching roller and stretching the mixture sheet passing through the gap between the fifth stretching roller and the fourth stretching roller; The third stretching roller, the fourth stretching roller, and the fifth stretching roller are positioned relative to each other so that they extend in a direction in which a virtual line passing through the rotation axis of the third stretching roller and the fourth stretching roller and a virtual line passing through the rotation axis of the fourth stretching roller and the fifth stretching roller intersect each other.

3. The manufacturing device according to claim 1 or 2, wherein: The angle formed by the two virtual lines is greater than or equal to 45°.

4. The manufacturing device according to claim 3, wherein: The angle formed by the two virtual lines is 90°.

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