Spinning device and spinning method

Abstract

To provide a spinning apparatus for reducing the influence of local protrusions formed on an outer peripheral surface of a wound portion of a belt-like body in the winding of the belt-like body having a film formed on a surface of a base material.SOLUTION: According to an embodiment, a spinning apparatus comprises a spinning head, a winding portion, and a sheet insertion portion. The spinning head forms a film on a surface of a base material in a state of covering one side edge of the base material in a width direction by discharging a raw material liquid to the base material. The winding portion includes a winding core for winding a belt-like body in which the film is formed on a surface of the base material. The sheet insertion portion inserts a sheet into between the outer peripheral surface of the portion wound on the winding core of the belt-like body and the portion carried into the winding core of the belt-like body.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] An embodiment of the present invention relates to a spinning apparatus and a spinning method. [Background technology]

[0002] A widely used manufacturing method is to discharge a raw material solution in which an organic material is dissolved in a solvent onto the surface of a substrate by electrospinning or the like, and form an organic fiber film on the surface of the substrate. For example, in a battery electrode group, a separator that insulates the positive electrode from the negative electrode may be formed integrally with the positive electrode or the negative electrode. In this case, an organic fiber film is formed on the surface of the electrode (positive electrode or negative electrode) that is formed integrally with the separator by electrospinning or the like, and the formed film becomes the separator. The strip with the film formed on the surface of the substrate as described above is wound around a winding core.

[0003] For example, when an electrode integrated with a separator is formed as a strip, the film is formed in such a manner that the film covers the edge of one side of the electrode, which is the substrate, in the width direction in order to prevent short circuits. In the operation of winding a strip in which the film covers the edge of one side of the substrate around a winding core, the part covering the edge of the film may be folded toward the outer periphery of the winding core or folded back inward in the width direction. When the above-mentioned folding and / or folding back occurs in the part covering the edge of the film during winding of the strip, a localized protuberance is formed on the outer periphery of the part of the strip wound around the winding core at the part where the film covers the edge of the substrate and in the vicinity thereof. When winding a strip, it is required to reduce the effect of the above-mentioned localized protuberance formed on the outer periphery of the wound part of the strip. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2012 / 014422 [Patent Document 2] JP 2008-150769 A [Patent Document 3] International Publication No. 2004 / 080681 Summary of the Invention [Problem to be solved by the invention]

[0005] The problem that the present invention aims to solve is to provide a spinning apparatus and a spinning method that reduce the effect of localized protuberances formed on the outer peripheral surface of the wound portion of a strip having a film formed on the surface of a substrate when the strip is wound up. [Means for solving the problem]

[0006] According to an embodiment, the spinning device includes a spinning head, a winding unit, and a sheet insertion unit. The spinning head ejects a raw material liquid onto the substrate to form a film on the substrate surface, covering one edge of the substrate in the width direction. The winding unit includes a winding core that winds up a strip of the substrate on which a film has been formed. The sheet insertion unit inserts a sheet between the outer peripheral surface of the portion of the strip wound around the winding core and the portion of the strip being transported to the winding core. At the same time, the sheet is inserted in a range shifted in the width direction with respect to a local protuberance formed on the outer peripheral surface of the portion of the strip wound around the winding core. . [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a schematic diagram showing a spinning apparatus according to a first embodiment. [Diagram 2] FIG. 2 is a schematic diagram showing an example of a substrate transported through a transport path of the spinning device according to the first embodiment. [Diagram 3] FIG. 3 is a schematic diagram showing a state in which a film is formed on a surface of a substrate by a spinning unit of the spinning device according to the first embodiment. [Figure 4] FIG. 4 is a schematic diagram showing an example of a portion of a strip transported through a transport path of the spinning device according to the first embodiment, where the strip has been peeled off by a peeling unit. [Diagram 5] FIG. 5 is a schematic diagram showing a state in which a strip is being wound around a winding core in the spinning device according to the first embodiment. [Figure 6]Figure 6 is a schematic diagram showing a state in which a sheet is inserted between the outer peripheral surface of a portion of the strip wound onto the winding core and a portion of the strip being transported to the winding core by the sheet insertion section of the spinning device of the first embodiment. [Figure 7] FIG. 7 is a schematic diagram showing a state in which the winding of the strip around the winding core has continued for a certain period of time after the sheet insertion unit has inserted the sheet in FIG. [Figure 8] FIG. 8 is a flow chart showing a process related to sheet insertion, which is performed by the control unit of the fiber spinning device according to the first embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, embodiments will be described with reference to the drawings.

[0009] Fig. 1 is a schematic diagram showing a spinning apparatus 1 according to a first embodiment. As shown in Fig. 1, the spinning apparatus 1 includes a let-off section 2, a spinning section 3, a peeling section 4, a winding section 5, a sheet inserting section 6, a detection section 7, a control section 8, and a conveying path 9. The conveying path 9 extends from the let-off section 2 to the winding section 5, passing through the spinning section 3 and the peeling section 4 in this order. In the spinning apparatus 1, a substrate 10 is conveyed along the conveying path 9 from the let-off section 2 to the winding section 5.

[0010] In the conveying path 9, the conveying direction in which the substrate 10 is conveyed, i.e., the direction toward the winding unit 5, is the downstream side. In the conveying path 9, the direction opposite to the conveying direction, i.e., the direction toward the delivery unit 2, is the upstream side. In addition, in the conveying path 9, a first direction that is the width direction intersecting (perpendicular or approximately perpendicular) with the conveying direction, and a second direction that intersecting (perpendicular or approximately perpendicular) with both the conveying direction and the first direction are defined. In FIG. 1, the first direction (width direction) of the conveying path 9 coincides or approximately coincides with the direction perpendicular to the paper surface.

[0011] The conveying path 9 may be provided with one or more guide rollers (not shown) for guiding the substrate 10 from the let-off section 2 to the winding section 5. In this case, in the conveying path 9, a guide roller is disposed at least between the let-off section 2 and the spinning section 3, between the spinning section 3 and the peeling section 4, or between the peeling section 4 and the winding section 5. A guide roller may also be disposed inside the spinning section 3 or inside the peeling section 4.

[0012] The extension state of the conveying path 9 from the unwinding section 2 to the winding section 5 is not particularly limited. In one example, the conveying path 9 extends along the horizontal direction, and in another example, the conveying path 9 extends along the vertical direction. In addition, one or more bent or turned-back portions of the conveying path 9 may be provided between the unwinding section 2 and the winding section 5, and the extension direction of the conveying path 9 may be changed at the bent or turned-back portions. In one example, a turned-back portion of the conveying path 9 is provided between the spinning section 3 and the stripping section 4, and in another example, a turned-back portion of the conveying path 9 is provided either inside the spinning section 3 or inside the stripping section 4.

[0013] FIG. 2 shows an example of the substrate 10 conveyed through the conveying path 9 in the spinning device 1. As shown in FIG. 2 and other figures, in this embodiment, an electrode (positive electrode or negative electrode) of an electrode group of a battery is used as the substrate 10. In the substrate 10, a longitudinal direction (a direction perpendicular or substantially perpendicular to the paper surface of FIG. 2), a width direction (direction indicated by arrows W1 and W2) intersecting (perpendicular or substantially perpendicular) with respect to the longitudinal direction, and a thickness direction (direction indicated by arrows T1 and T2) intersecting (perpendicular or substantially perpendicular) with respect to both the longitudinal direction and the width direction are defined. In the substrate 10, the dimension (width) along the width direction is smaller than the dimension along the longitudinal direction, and the dimension along the thickness direction is smaller than the dimension along the width direction. In addition, the substrate 10 has edges 17 and 18. In the substrate 10, the edge (first edge) 17 is an edge on one side in the width direction, and the edge (second edge) 18 is an edge on the opposite side to the edge 17 in the width direction. In the base material 10, the edges 17 and 18 form a pair of long side edges along the longitudinal direction.

[0014] The substrate 10 includes a current collector 13 and an active material-containing layer 14 supported on the surface of the current collector 13. The current collector 13 is made of a metal having electrical conductivity, such as aluminum or an aluminum alloy, and the active material-containing layer 14 contains an active material. In one example of FIG. 2, the active material-containing layer 14 is supported on both sides of the current collector 13. In addition, in the substrate 10, the active material-containing layer 14 is supported on the surface of the current collector 13 over the entire length or approximately the entire length in the longitudinal direction. The active material-containing layer 14 is formed along the width direction up to an edge (first edge) 17 of the current collector 13. However, in the current collector 13 of the substrate 10, an unsupported portion 15 that does not support the active material-containing layer 14 is formed at an edge (second edge) 18 and its vicinity. In the substrate 10, the unsupported portion 15 is formed over the entire length or approximately the entire length in the longitudinal direction.

[0015] As shown in FIG. 1 and other figures, the delivery section 2 includes a delivery core 21. The delivery core 21 is formed by, for example, a reel. The delivery core 21 has a central axis, and the substrate 10 is wound around the delivery core 21 in a roll shape. The substrate 10 is wound around the delivery core 21 in a state in which the width direction of the substrate 10 coincides or approximately coincides with the direction along the central axis of the delivery core 21, and the longitudinal direction of the substrate 10 coincides with the circumferential direction of the delivery core 21. In the delivery section 2, the delivery core 21 is rotated in the direction of the arrow R1 by driving a driving member (not shown) such as a motor, whereby the substrate 10 is delivered to the conveying path 9, and the substrate 10 is supplied to the conveying path 9.

[0016] In the conveying path 9, the substrate 10 sent out from the sending unit 2 is conveyed toward the winding unit 5. The substrate 10 is conveyed in a state in which the width direction of the substrate 10 coincides or approximately coincides with a first direction (width direction) of the conveying path 9 and the thickness direction of the substrate 10 coincides or approximately coincides with a second direction of the conveying path 9.

[0017] The spinning unit 3 forms a film 11 of organic fibers on the surface of the substrate 10 conveyed through the conveying path 9. As a result, a strip 12 including the substrate 10 and the film 11 is formed. FIG. 3 shows a state in which the film 11 is formed on the surface of the substrate 10 by the spinning unit 3. In FIG. 3, a cross section perpendicular or substantially perpendicular to the conveying direction of the conveying path 9 is shown, and the substrate 10 is shown in a cross section perpendicular or substantially perpendicular to the longitudinal direction. As shown in FIG. 1 and FIG. 3, the spinning unit 3 includes one or more spinning heads 31, and in the example shown in FIG. 1, six spinning heads 31 are provided in the spinning unit 3. Each of the spinning heads 31 includes a head body 32 and a nozzle 33 protruding from the head body. In each of the spinning heads 31, for example, a raw material liquid in which an organic material is dissolved in a solvent can be stored inside the head body 32.

[0018] In each of the spinning heads 31, the raw material liquid stored inside the head body 32 is discharged from the nozzle 33 to the substrate 10. The substrate 10 is transported through the side of each of the spinning heads 31 where the raw material liquid is discharged. Each of the spinning heads 31 may be provided with one nozzle 33 or may be provided with multiple nozzles 33. In one example of FIG. 3, each of the spinning heads 31 is provided with four nozzles 33. In addition, in this embodiment, a power source 35 is provided in the spinning section 3. In one example, the power source 35 is a DC power source. In this embodiment, the power source 35 applies a voltage to the spinning head 31 and generates a potential difference between the substrate 10 transported in the transport path 9 and the nozzle 33. Then, the raw material liquid charged by the application of the voltage to the nozzle 33 is discharged from each of the nozzles 33 toward the substrate 10, and a film 11 is formed on the surface of the substrate 10. The raw material liquid may be charged to a positive polarity or a negative polarity.

[0019] The organic substance used in the raw material liquid may be, for example, one or more selected from the group consisting of polyolefin, polyether, polyimide, polyketone, polysulfone, cellulose, polyvinyl alcohol, polyamide, polyamideimide, and polyvinylidene fluoride. Examples of polyolefin include polypropylene and polyethylene.

[0020] The voltage between each nozzle 33 of the spinning head 31 and the substrate 10 is appropriately set in response to the type of solvent and solute in the raw material liquid, the boiling point and vapor pressure curve of the solvent of the raw material liquid, the concentration and temperature of the raw material liquid, the shape of the nozzle 33, and the distance between the substrate 10 and the nozzle 33. In one example, the voltage (potential difference) applied between each nozzle 33 of the spinning head 31 and the substrate 10 is appropriately set between 1 kV and 100 kV. The discharge speed of the raw material liquid from each nozzle 33 of the spinning head 31 corresponds to the concentration, viscosity, and temperature of the raw material liquid, the voltage applied between each nozzle 33 of the spinning head 31 and the substrate 10, and the shape of the nozzle 33.

[0021] As described above, the spinning unit 3 of this embodiment forms an organic fiber film 11 on the surface of the substrate 10 by electrospinning (also called electric charge spinning and electric charge induction spinning, etc.), and forms a strip 12 including the substrate 10 and the film 11. In the example of FIG. 1 and FIG. 3, the raw material liquid is discharged onto both sides of the substrate 10, but in one example, the raw material liquid may be discharged onto only one side of the substrate 10 being transported. In this case, the film 11 is formed on only one side of the substrate 10. In another example, a voltage may be applied by a power source 35 or the like to either the supply source of the raw material liquid to the spinning head 31 or the supply path of the raw material liquid between the supply source and the spinning head 31 to charge the raw material liquid. In this case, the charged raw material liquid is also discharged from each of the nozzles 33 toward the substrate 10.

[0022] In one example, the substrate 10 to be transported may be placed on a collector (not shown) in the spinning section 3. Then, as described above, the raw material liquid is discharged from the nozzle 33 of the spinning head 31 toward the collector and the substrate 10. As a result, an organic fiber film 11 is formed on the surface of the substrate 10 placed on the collector. In this case, even if the substrate 10 has electrical insulation, the film 11 can be formed on the surface of the substrate 10. In the spinning section 3, the organic fiber film 11 may be formed on the surface of the substrate 10 by a method other than the electrospinning method. In one example, instead of the electrospinning method, the organic fiber film 11 is formed on the surface of the substrate 10 by any of the inkjet method, the jet dispenser method, and the spray coating method. In this case, the raw material liquid in which an organic material is dissolved in a solvent is discharged from the spinning head 31 to the surface of the substrate 10 in the spinning section 3.

[0023] In one example shown in FIG. 3 etc., the electrode (positive or negative electrode) described above serves as the substrate 10, and a separator is formed on the surface of the substrate 10 as a membrane 11 made of organic fibers. Therefore, the strip 12 in which the membrane 11 is formed on the surface of the substrate 10 is an electrode (positive or negative electrode) with an integrated separator. In the electrode group of the battery, the separator electrically insulates the positive and negative electrodes. Also, in one example shown in FIG. 3 etc., the membrane 11 is formed in the spinning section 3 so that both the edge (first edge) 17 and the edge (second edge) 18 are covered with the membrane 11.

[0024] The strip 12 having the film 11 formed on the surface of the substrate 10 as described above is transported to the peeling unit 4 through the transport path 9. The peeling unit 4 peels off a part of the film 11 formed in the spinning unit 3 from the substrate 10. In the part from which the film 11 has been peeled off by the peeling unit 4, the substrate 10 is no longer covered with the film 11. In the peeling unit 4, the film 11 is peeled off using, for example, a rotating brush.

[0025] FIG. 4 shows an example of a portion of the strip 12 where the strip 12 has been stripped by the strip 4. FIG. 4 shows a cross section perpendicular or substantially perpendicular to the longitudinal direction of the substrate 10 (strip 12). In the example of FIG. 4, the electrode with the separator integrated therewith is transported to the strip 12 as the strip 12. In this case, the strip 4 strips the membrane 11 from the substrate 10 at the edge 18 of the substrate 10 and its vicinity. Therefore, in the portion of the strip 12 where the strip 12 has been stripped by the strip 4, the edge (second edge) 18 and its vicinity are not covered with the membrane 11. For example, due to the stripping by the strip 4, at least a part of the unsupported portion 15 of the current collector 13 where the active material-containing layer 14 is not supported is not covered with the membrane 11. However, even in the portion of the strip 12 where the strip 12 has been stripped by the strip 4, the edge (first edge) 17 and its vicinity are maintained in a state of being covered with the membrane 11.

[0026] In one example, the scraping unit 4 may not be provided. In this case, the discharge range of the raw material liquid from each of the spinning heads 31 is adjusted so that the raw material liquid is not discharged onto the edge 18 of the substrate 10 being transported and its vicinity. As a result, the film 11 is formed on the surface of the substrate 10 so that the edge 18 and its vicinity are not covered by the film 11.

[0027] As shown in FIG. 1 and other figures, the winding section 5 includes a winding core 51. The winding core 51 is formed of, for example, a reel. The winding core 51 has a central axis, and the strip 12 transported through the transport path 9 is carried into the winding core 51. For example, the strip 12 is carried into the winding core 51 with the edge (first edge) 17 of the substrate 10 covered with the film 11 and the edge (second edge) 18 of the substrate 10 not covered with the film 11. In the winding section 5, the winding core 51 is rotated in the direction of the arrow R2 by driving a driving member such as a motor (not shown), so that the strip 12 carried into the winding core 51 from the transport path 9 is wound around the outer periphery of the winding core 51. The strip 12 is wound around the winding core 51 in a roll shape with the winding core 51 at the center. In addition, the strip 12 is wound around the winding core 51 in a state in which the width direction of the substrate 10 (strip 12) coincides or approximately coincides with the direction along the central axis of the winding core 51, and the longitudinal direction of the substrate 10 (strip 12) coincides with the circumferential direction of the winding core 51.

[0028] The sheet insertion unit 6 is disposed near the winding core 51, and is disposed on the side of the winding core 51 where the strip 12 is fed. When the strip 12 is wound around the winding core 51, the sheet insertion unit 6 is operated to insert a sheet 61 between the outer peripheral surface of the portion of the strip 12 wound around the winding core 51 and the portion of the strip 12 fed to the winding core 51. At this time, the sheet 61 is inserted from the side where the transport path 9 is located, that is, from the side where the strip 12 is fed to the winding core 51. The sheet insertion unit 6 includes an operating mechanism, which, when operated, moves the sheet in the same manner as a paper feed mechanism of a printer to insert the sheet 61. The sheet insertion unit 6 also includes a driving member (not shown) such as a motor, and the operating mechanism is operated by driving the driving member to operate the operating mechanism.

[0029] After the sheet 61 is inserted as described above, if the winding of the strip 12 onto the winding core 51 is continued for a certain period of time, the portion of the strip 12 wound onto the winding core 51 comes into contact with the inserted sheet 61 from both the inner and outer circumferential sides. At this time, in the portion of the strip 12 wound onto the winding core 51, one of the turns of the strip 12 abuts against the sheet 61 from the inner circumferential side. Then, the one turn of the strip 12 that is adjacent to and overlaps the one turn of the sheet 61 on the outer circumferential side abuts against the sheet 61 from the inner circumferential side.

[0030] In the sheet 61, a length direction, a width direction perpendicular or substantially perpendicular to the length direction, and a thickness direction perpendicular or substantially perpendicular to both the length direction and the width direction are defined. The sheet 61 is inserted in a state in which the width direction of the sheet 61 coincides or substantially coincides with the width direction of the substrate 10, and the thickness direction of the sheet 61 coincides or substantially coincides with the thickness direction of the substrate 10. In the sheet 61, the dimension along the thickness direction is smaller than the dimension along the length direction and the dimension along the width direction. In one example, the dimension (length) of the sheet 61 along the length direction is about 30 cm. In one example, the dimension (width) of the sheet 61 along the width direction is about the same as the dimension (width) of the substrate 10 along the width direction.

[0031] The detector 7 is disposed near the winding core 51, for example, on the side opposite to the side where the strip 12 is fed in with respect to the winding core 51, that is, in this example, on the side opposite to the side where the sheet insertion unit 6 is located with respect to the winding core 51. The detector 7 observes the outer peripheral surface of the portion of the strip 12 wound around the winding core 51 from the side opposite to the side where the strip 12 is fed in. The detector 7 then detects localized protrusions on the outer peripheral surface of the portion of the strip 12 wound around the winding core 51. The detector 7 performs the detection using, for example, a CCD camera or a laser displacement meter.

[0032] 5 shows a state in which the strip 12 is wound around the winding core 51. In this embodiment, as described above, the strip 12 in which the edge (first edge) 17 of the substrate 10 is covered with the film 11 is wound around the winding core 51. In this case, when the strip 12 is wound around the winding core 51, the portion covering the edge 17 of the film 11 may be folded toward the outer periphery of the winding core 51 or folded back inward in the width direction.

[0033] When the strip 12 is wound up to a certain extent around the winding core 51, bending and / or folding occurs in the portion covering the edge 17 of the film 11, and as a result, a local protuberance 62 as shown in FIG. 5 and the like is formed on the outer circumferential surface of the portion of the strip 12 wound up around the winding core 51. On the outer circumferential surface of the wound portion of the strip 12, a local protuberance 62 is formed in the portion where the film 11 covers the edge (first edge) 17 of the substrate 10 and in the vicinity thereof. The detection unit 7 detects the local protuberance formed on the outer circumferential surface of the wound portion of the strip 12, including the protuberance 62. In the following description, the protuberance amount ε of the local protuberance such as the protuberance 62 is defined.

[0034] The control unit 8 is composed of a processing device such as a computer. The control unit 8 includes a processor or integrated circuit (control circuit) including a CPU (Central Processing Unit), an ASIC (Application Specific Integrated Circuit), a microcomputer or an FPGA (Field Programmable Gate Array), and a storage medium such as a memory. The control unit 8 may include only one integrated circuit or multiple integrated circuits. The control unit 8 performs processing by executing a program or the like stored in a storage medium. The control unit 8 controls the operation of each of the components in the spinning device 1. The spinning device 1 may also include an input unit in which an operator or the like inputs an operation command for each of the components, and a notification unit that notifies information and warning information related to the spinning device 1. The notification unit notifies information, for example, by voice or screen display.

[0035] The control unit 8 controls the operation of the sheet insertion unit 6 based on the detection result of the detection unit 7 regarding the local protuberance, and controls the insertion of the sheet 61 by the sheet insertion unit 6. The control unit 8 determines whether or not a local protuberance exists on the outer peripheral surface of the wound portion of the web 12 based on the detection result of the detection unit 7. If a local protuberance exists, the control unit 8 calculates a protuberance amount ε of the local protuberance based on the detection result of the detection unit 7. The control unit 8 operates the sheet insertion unit 6 based on the fact that the protuberance amount ε of the local protuberance on the outer peripheral surface of the wound portion of the web 12 exceeds a reference range, and causes the sheet insertion unit 6 to insert the sheet 61 between the outer peripheral surface of the portion of the web 12 wound around the winding core 51 and the portion of the web 12 being transported to the winding core 51. At this time, the control unit 8 determines that the protuberance amount ε of the local protuberance exceeds the reference range based on, for example, the fact that the protuberance amount ε of the local protuberance is equal to or greater than a threshold value εth.

[0036] FIG. 6 shows a state where a sheet 61 is inserted between the outer peripheral surface of the portion of the strip 12 wound around the winding core 51 and the portion of the strip 12 being transported to the winding core 51. As shown in FIG. 6, the sheet inserting unit 6 inserts the sheet 61 into a range that is shifted in the width direction of the substrate 10 (strip 12) with respect to a local protuberance 62 on the outer peripheral surface of the portion of the strip 12 wound around the winding core 51. Therefore, the sheet 61 is inserted into a position that is out of the edge (first edge) and its vicinity in the width direction of the substrate 10. The sheet inserting unit 6 also inserts the sheet 61 into the outer peripheral surface of the wound portion of the strip 12 in a state where the sheet 61 protrudes outward in the width direction from the edge (second edge) 18 opposite the edge 17 of the substrate 10.

[0037] FIG. 7 shows a state where the strip 12 has been wound around the winding core 51 for a certain period of time after the sheet 61 has been inserted. The state shown in FIG. 7 is, for example, a state where the strip 12 has been wound around one revolution from the state shown in FIG. 6. In this embodiment, the sheet 61 is inserted as described above, and thus the step between the local protuberance and the non-protuberance portion is eliminated or reduced in the range where the sheet 61 has been inserted in the circumferential direction of the winding core. Therefore, as shown in FIG. 7, when the strip 12 has been wound around the winding core 51 for a certain period of time after the sheet 61 has been inserted, the local protuberance of the outer peripheral surface of the wound portion of the strip 12 is eliminated or reduced. In addition, even when the strip 12 has been wound around the winding core 51 for a certain period of time after the sheet 61 has been inserted, the inserted sheet 61 protrudes outward in the width direction from the edge 18.

[0038] FIG. 8 shows a process related to the insertion of the sheet 61, which is performed by the control unit 8. In this embodiment, the control unit 8 repeatedly performs the process shown in FIG. 8 over time while the sheet 61 is being wound around the winding core 51 of the winding unit 5. In the process shown in FIG. 8, the control unit 8 acquires a detection result by the detection unit 7 regarding a localized protuberance on the outer peripheral surface of the wound portion of the strip 12 (S101). Then, the control unit 8 determines whether or not a localized protuberance exists on the outer peripheral surface of the wound portion of the strip 12 based on the acquired detection result (S102). If no localized protuberance exists (S102-No), the control unit 8 does not operate the sheet insertion unit 6, and the sheet 61 is not inserted on the outer peripheral surface of the wound portion of the strip 12.

[0039] If a localized bulge is present (S102-Yes), the control unit 8 determines whether the bulge amount ε of the localized bulge is within a reference range (S103). If the bulge amount ε is within the reference range (S103-Yes), the control unit 8 does not operate the sheet insertion unit 6, and the sheet 61 is not inserted into the outer peripheral surface of the wound portion of the web 12. On the other hand, if the bulge amount ε exceeds the reference range (S103-No), the control unit 8 operates the sheet insertion unit 6, and inserts the sheet 61 into the outer peripheral surface of the wound portion of the web 12 (S104).

[0040] In this embodiment, as described above, the sheet inserting section 6 inserts the sheet 61 between the outer peripheral surface of the portion of the strip 12 wound around the winding core 51 and the portion of the strip 12 being transported to the winding core 51. In a state in which a localized protuberance is formed on the outer peripheral surface of the wound portion of the strip 12, the sheet 61 is inserted into the outer peripheral surface of the wound portion, thereby eliminating or reducing the localized protuberance as described above. Therefore, in this embodiment, the influence of the localized protuberance formed on the outer peripheral surface of the wound portion of the strip 12 is reduced when the strip 12 is wound around the winding core 51. By reducing the influence of the localized protuberance described above when the strip 12 is wound around the winding core 51, distortion, etc., is less likely to occur in the strip 12 when the strip 12 is wound, and damage, etc., to the strip 12 is effectively prevented. This improves the yield in the manufacture of the strip 12 including electrodes, etc., integral with the separator.

[0041] In the manufacture of batteries and the like, an electrode group is manufactured using the strip 12, which is an electrode integrated with a separator. In the manufacture of an electrode group, the wound strip 12 is unwound and transported. In this embodiment, when the strip 12 is wound, localized protrusions on the outer circumferential surface of the wound portion are reduced as described above. This improves the workability of unwinding the strip 12 when the wound strip 12 is used, for example.

[0042] Furthermore, in this embodiment, the control unit 8 controls the insertion of the sheet 61 by the sheet insertion unit 6 based on the detection result of the detection unit 7 with respect to the local bulge. Then, the control unit 8 causes the sheet insertion unit 6 to insert the sheet 61 based on the fact that the bulge amount ε of the local bulge on the outer peripheral surface of the wound portion of the strip 12 exceeds a reference range. Therefore, while the strip 12 is being wound, the sheet 61 is inserted at an appropriate timing on the outer peripheral surface of the wound portion. Therefore, when the strip 12 is being wound around the winding core 51, the influence of the local bulge formed on the outer peripheral surface of the wound portion of the strip 12 is further effectively reduced.

[0043] Furthermore, the sheet insertion unit 6 inserts the sheet 61 into a range that is shifted in the width direction of the substrate 10 relative to the local protuberance. Therefore, when the strip 12 is wound up, the sheet 61 is inserted into an appropriate position on the outer peripheral surface of the wound portion. Therefore, the local protuberance formed on the outer peripheral surface of the wound portion of the strip 12 is appropriately eliminated or reduced by the insertion of the sheet 61.

[0044] Furthermore, the sheet insertion unit 6 inserts the sheet 61 in a state where it protrudes outward in the width direction from the edge (second edge) 18 of the base material 10. This allows the worker or the like to properly recognize the position where the local protrusion is formed in the strip 12 based on the position of the inserted sheet 61, etc. Furthermore, by inserting the sheet 61 in such a state where it protrudes outward in the width direction from the edge (second edge) 18 of the base material 10, the inserted sheet 61 can be easily and reliably removed in the subsequent process of unwinding the strip 12.

[0045] In the above-mentioned embodiment, an electrode integrated with a separator has been given as an example of the strip 12, but the strip 12 is not limited to this. In the strip 12, it is sufficient that the film 11 is formed on the surface of the substrate 10 in a state that covers one edge (17) of the substrate 10 in the width direction. In either case, however, when winding the strip 12 onto the winding core 51, a sheet 61 can be inserted between the outer peripheral surface of the portion of the strip 12 wound onto the winding core 51 and the portion of the strip introduced onto the winding core 51.

[0046] According to at least one of these embodiments or examples, a sheet is inserted between the outer peripheral surface of the portion of the strip wound around the winding core and the portion of the strip being transported to the winding core, thereby providing a spinning device and a spinning method that reduce the effect of localized protuberances formed on the outer peripheral surface of the wound portion of the strip when winding a strip having a film formed on the surface of a substrate.

[0047] Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and spirit of the invention, and are included in the scope of the invention and its equivalents described in the claims. The following are additional notes. [1] A spinning head that discharges a raw material liquid onto a substrate to form a film on the surface of the substrate while covering a first edge, which is an edge on one side of the substrate in the width direction; a winding section including a winding core for winding up a strip of the film formed on the surface of the substrate; a sheet insertion section that inserts a sheet between an outer peripheral surface of a portion of the strip that is wound around the winding core and a portion of the strip that is being transported to the winding core; A spinning apparatus comprising: [2] A detection unit that detects a local protrusion on the outer peripheral surface of the portion of the strip wound around the winding core; a control unit that controls insertion of the sheet by the sheet insertion unit based on a detection result by the detection unit; The spinning apparatus of [1] further comprises: [3] A spinning device according to [1] or [2], wherein the sheet insertion section inserts the sheet in a range shifted in the width direction relative to a local protrusion formed on the outer peripheral surface of the portion of the strip wound around the winding core. [4] Any one of the spinning devices [1] to [3], wherein the sheet insertion section inserts the sheet in a state where the sheet protrudes outward in the width direction from a second edge of the base material, which is an edge opposite to the first edge. [5] Discharging the raw material liquid from the spinning head onto the substrate to form a film on the surface of the substrate in a state in which the film covers one edge of the substrate in the width direction; winding a strip having the film formed on the surface of the substrate onto a winding core; inserting a sheet between an outer peripheral surface of a portion of the strip wound around the winding core and a portion of the strip being transported to the winding core; A spinning method comprising: [Explanation of symbols]

[0048] 1...spinning device, 3...spinning section, 4...peel-off section, 5...winding section, 6...sheet insertion section, 7...detection section, 8...control section, 9...conveying path, 10...substrate, 11...film, 12...belt, 17...edge (first edge), 18...edge (second edge), 31...spinning head, 51...winding core, 61...sheet, 62...protuberance.

Claims

1. a spinning head that discharges a raw material liquid onto a substrate to form a film on a surface of the substrate in a state where a first edge, which is an edge on one side of the substrate in a width direction, is covered; a winding section including a winding core for winding up a strip of the film formed on the surface of the substrate; a sheet insertion section that inserts a sheet between an outer peripheral surface of a portion of the strip wound around the winding core and a portion of the strip being transported to the winding core, and inserts the sheet in a range that is shifted in the width direction with respect to a local protrusion formed on the outer peripheral surface of the portion of the strip wound around the winding core; A spinning apparatus comprising:

2. a detection unit that detects the localized protrusion on the outer peripheral surface of the portion of the strip wound around the winding core; a control unit that controls insertion of the sheet by the sheet insertion unit based on a detection result by the detection unit; The spinning apparatus of claim 1 further comprising:

3. The spinning device according to claim 1 or 2, wherein the sheet insertion section inserts the sheet in a state where the sheet protrudes outward in the width direction from a second edge of the base material, the second edge being an edge opposite to the first edge.

4. discharging the raw material liquid from a spinning head onto a substrate to form a film on a surface of the substrate in a state in which the film covers an edge of one side of the substrate in a width direction; winding a strip having the film formed on the surface of the substrate onto a winding core; inserting a sheet between an outer peripheral surface of a portion of the strip wound around the winding core and a portion of the strip being transported to the winding core, and inserting the sheet in a range shifted in the width direction with respect to a local protrusion formed on the outer peripheral surface of the portion of the strip wound around the winding core; A spinning method comprising:

Images