JP2016051648A - Polar plate manufacturing method and polar plate manufacturing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide polar plate manufacturing method and device that can continuously manufacture excellent polar plates.SOLUTION: A method of manufacturing a polar plate A comprises: sequentially feeding a base material in one direction; pressing active material mixture coated on the base material by the outer peripheral surface of a press roller which is rotatable in connection with the feeding of the base material, thereby manufacturing a polar plate A having an active material layer on the base material; and removing deposits of the active material mixture adhering to the outer peripheral surface of the press roller 21 while performing pressing. A device for manufacturing a polar plate A has a feeding unit 10 for sequentially feeding a base material in one direction, a press unit 20 which has a press roller 21 rotatable in connection with the feeding of the base material, and presses active material mixture coated on the base material by the outer peripheral surface of the press roller 21, thereby manufacturing a polar plate A having an active material layer on the base material, and a cleaning unit 30 for removing deposits of the active material mixture adhering to the outer peripheral surface of the press roller by press.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an electrode plate manufacturing method and an electrode plate manufacturing apparatus.

  Conventionally, as an electrode plate for an electrode of a storage element such as a battery such as a lithium ion battery or a nickel metal hydride battery or a capacitor such as an electric double layer capacitor, for example, a substrate and an active material layer laminated on the substrate are provided. Is known (Patent Document 1).

  In manufacturing such an electrode plate, for example, the active material mixture applied on the base material is pressed while the belt-like base material is continuously conveyed in one direction in the longitudinal direction. An active material layer is formed.

  More specifically, the active material mixture applied on the substrate is pressed by a rotatable press roller. By pressing with a press roller, the active material mixture on the base material is rolled into an active material layer.

JP 2010-033918 A

  By the way, in the manufacturing method of said electrode plate, the active material mixture and a press roller contact by press, and the constituent material of an active material mixture adheres to a press roller as a deposit. Since the press roller rotates, the active material mixture is pressed while the deposit is adhered. If the pressing is continued by the press roller to which the adhered material is adhered, for example, the adhered material (particularly, the raised portion) presses the active material mixture on the subsequent substrate being conveyed, and the active material Variations in press pressure with respect to the mixture occur. For this reason, the thickness and density of the active material layer are not necessarily homogenized sufficiently.

  This invention makes it a subject to provide the manufacturing method of the electrode plate which can manufacture a favorable electrode plate continuously, and the manufacturing apparatus of an electrode plate.

The method for producing the electrode plate of the present invention comprises:
Conveying the substrate continuously in one direction;
An electrode plate having an active material layer on a base material is manufactured by pressing the active material mixture applied on the base material on the outer peripheral surface of a press roller that can rotate in accordance with the transport of the base material. When,
Removing the adhering material of the active material mixture adhering to the outer peripheral surface of the press roller while performing the pressing.

  In the manufacturing method of the electrode plate having the above configuration, the active material mixture on the substrate that is continuously conveyed in one direction by conveyance is pressed by a rotatable press roller. The active material mixture and the outer peripheral surface of the press roller come into contact with each other by pressing. Due to the contact, a part of the constituent material of the active material mixture may adhere to the outer peripheral surface of the press roller. However, in the manufacturing method of the electrode plate having the above-described configuration, the adhering matter adhered to the outer peripheral surface of the press roll is removed while pressing with the press roll. Press the active material mixture. Therefore, the active material mixture can be uniformly pressed without stopping the rotation of the press roller. Therefore, a good electrode plate can be continuously produced.

As another aspect of the manufacturing method of the electrode plate of the present invention, an aspect is adopted in which the adhering material on the outer peripheral surface of the press roller is removed by pressing the pressing member against the outer peripheral surface of the press roller.
By such an aspect, the deposits on the outer peripheral surface of the press roller can be more reliably removed.

As another aspect of the manufacturing method of the electrode plate of the present invention, an aspect is adopted in which the pressing member is vibrated while being pressed against the outer peripheral surface of the press roller, thereby removing deposits on the outer peripheral surface of the press roller.
According to such an aspect, the deposits on the outer peripheral surface of the press roller can be more reliably removed by vibration.

As another aspect of the method of manufacturing the electrode plate of the present invention, the pressing member is pressed against the outer peripheral surface of the press roller below the rotation center of the press roller, thereby removing deposits on the outer peripheral surface of the press roller. The mode to do is adopted.
According to such an aspect, the deposits removed by the pressing member do not adhere again to the outer peripheral surface of the press roller even if it falls, so that the deposits attached to the outer peripheral surface of the press roller can be more reliably removed.

As another aspect of the manufacturing method of the electrode plate of the present invention, an aspect including detecting an outer peripheral surface adhering substance by monitoring the outer peripheral surface of the press roller is adopted.
According to such an aspect, the outer peripheral surface of the press roller can be kept clean without removing extraneous matter more than necessary.

As another aspect of the manufacturing method of the electrode plate of the present invention, a press formed of a material including at least one of a material including an elastic material, a material including a porous material, and a material including a heat resistant material. A mode is adopted in which deposits on the outer peripheral surface of the press roller are removed by pressing the contact member against the outer peripheral surface of the press roller.
As another aspect of the manufacturing method of the electrode plate of the present invention, an aspect is adopted in which the adhering material on the outer peripheral surface of the press roller is removed by pressing a pressing member containing an abrasive against the outer peripheral surface of the press roller. .
By such an aspect, the deposit | attachment adhering to the outer peripheral surface of a press roller can be removed more reliably.

As another aspect of the manufacturing method of the electrode plate of the present invention, the outer periphery of the press roller is pressed by pressing a pressing member containing a solvent that dissolves or softens at least a part of the active material mixture against the outer peripheral surface of the press roller. A mode of removing the deposit on the surface is adopted.
With such a configuration, it is possible to dissolve or soften deposits attached to the outer peripheral surface of the press roller. Since the deposit is dissolved or softened, the pressing member can more reliably remove the deposit. Accordingly, it is possible to more sufficiently remove deposits attached to the outer peripheral surface of the press roller.

As another aspect of the method for producing an electrode plate of the present invention, an aspect including supplying a solvent to a pressing member is employed.
According to such an aspect, it is possible to prevent the pressing member from running out of the solvent. Accordingly, it is possible to more sufficiently remove deposits attached to the outer peripheral surface of the press roller.

The electrode plate manufacturing apparatus of the present invention comprises:
A transport unit for continuously transporting the substrate in one direction;
A pressing unit having a press roller that can rotate in accordance with the conveyance of the base material, and the active material layer applied on the base material is pressed on the outer peripheral surface of the press roller to thereby form an active material layer on the base material. A press section for producing an electrode plate having
And a cleaning unit that removes deposits of the active material mixture adhered to the outer peripheral surface of the press roller by pressing while performing pressing.

  In the electrode plate manufacturing apparatus having the above-described configuration, the active material mixture on the substrate that is continuously conveyed in one direction by the conveying unit is pressed by a rotatable press roller of the pressing unit. The active material mixture may come into contact with the outer peripheral surface of the press roller by pressing. However, in the electrode plate manufacturing apparatus having the above-described configuration, the adhering matter adhering to the outer peripheral surface of the press roll is removed while pressing with the press roll. The active material mixture on the material is pressed. Therefore, the active material mixture is pressed uniformly without stopping the rotation of the press roller. Therefore, a good electrode plate is manufactured continuously.

  The electrode plate manufacturing apparatus and the electrode plate manufacturing method of the present invention have an effect that a good electrode plate can be manufactured continuously.

Schematic which represented roughly one Embodiment of the manufacturing apparatus of an electrode plate. The schematic diagram showing roughly the cleaning part of one embodiment. Sectional drawing which represented the cross section of an example of an electrode plate typically. Schematic which shows the cleaning part of other embodiment roughly.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  As the electrode plate A manufactured by the electrode plate manufacturing apparatus 1 of the present embodiment, for example, the electrode plate A used for the electrode of the electric storage element can be mentioned. The electrode plate A becomes, for example, an electrode constituting the power storage element by being further subjected to cutting or the like. Examples of the power storage element include a primary battery, a secondary battery, and a capacitor.

  The electrode plate manufacturing apparatus 1 according to the present embodiment includes a transport unit 10 that continuously transports the base material B in one direction, and a press unit 20 that includes a press roller 21 that can rotate corresponding to the transport of the base material B. A pressing unit 20 for producing an electrode plate A having an active material layer C on the substrate B by pressing the active material mixture applied on the substrate B on the outer peripheral surface of the press roller 21; And a cleaning unit 30 that removes the adhering substance of the active material mixture adhering to the outer peripheral surface of the press roller 21 by pressing.

  The electrode plate manufacturing apparatus 1 of the present embodiment is configured to continuously transport the base material B in one direction by the transport unit 10. The electrode plate manufacturing apparatus 1 is configured to form an active material layer C by pressing an active material mixture on a continuously conveyed base material B by a press roller 21 of a press unit 20. . The electrode plate manufacturing apparatus 1 is configured to manufacture an electrode plate A having a base material B and an active material layer C on the base material B. The electrode plate manufacturing apparatus 1 is configured to remove, by the cleaning unit 30, the active material mixture adhering to the outer peripheral surface of the press roller 21 by contacting the active material mixture by pressing. Yes.

  The electrode plate manufacturing apparatus 1 of the present embodiment further includes an application unit 80 that applies the active material mixture to the base material B before being sent to the press unit 20, as shown in FIG.

  For example, as shown in FIG. 1, the transport unit 10 includes an unwinding roller 11 that feeds out a wound belt-like base material B, and a winding roller 12 that winds up the base material B sent from the unwinding roller 11. . A press unit 20 is arranged between the unwinding roller 11 and the winding roller 12.

  The conveying unit 10 continuously feeds the base material B from the unwinding roller 11 toward the press unit 20 by the rotation of the unwinding roller 11, while the electrode plate A produced by the press unit 20 is transferred to the winding roller 12. It is comprised so that it may wind up continuously by rotation.

The base material B fed out from the unwinding roller 11 of the transport unit 10 is formed in a strip shape. Moreover, the base material B is normally formed in foil shape.
The thickness of the base material B is, for example, 5 to 50 μm.
The material of the base material B is not particularly limited, and for example, metal is adopted.
Specifically, when the manufactured electrode plate A is used in the positive electrode of a nonaqueous electrolyte secondary battery, as the base material B, for example, an aluminum foil is employed. In the case where the manufactured electrode plate A is used in the negative electrode of a nonaqueous electrolyte secondary battery, as the base material B, for example, a copper foil is employed.

  The active material mixture is not applied to the base material B fed from the unwinding roller 11 of the transport unit 10. That is, the unwinding roller 11 of the transport unit 10 is configured to send out only the base material B, for example. An active material mixture is applied to the base material B fed from the unwinding roller 11 by the application unit 80.

The electrode plate A taken up by the take-up roller 12 of the transport unit 10 includes a base material B and an active material layer C formed on the base material B by the press unit 20. That is, the manufactured electrode plate A has a base material B and an active material layer C laminated on the base material B. For example, as shown in FIG. 3, the electrode plate A has active material layers C on both sides of the base material B, respectively.
The thickness of the electrode plate A is usually 20 to 500 μm.

The application unit 80 is disposed between the unwinding roller 11 and the press unit 20. The application unit 80 is configured to apply (apply) the active material mixture having fluidity to the base material B.
The active material mixture in the application part 80 has fluidity by containing a liquid or by being heated.

The active material mixture is applied on the base material B before being pressed. That is, the active material mixture is applied by the application unit 80 so as to spread along at least one surface of the substrate B before being conveyed to the press unit 20.
In addition, on a base material means that an active material mixture is arranged on at least one surface side of the base material. That is, the active material mixture spreads along at least one surface of the base material while being in contact with or separated from the base material surface.
Specifically, the active material mixture is applied to both surfaces of the substrate by the application unit 80 before being pressed.

The active material mixture contains at least active material particles. The active material mixture usually contains 80 to 99% by mass of active material particles.
Examples of the active material particles include general positive electrode active material particles used in a positive electrode of a battery, general negative electrode active material particles used in a negative electrode of a battery, and the like.

The active material mixture may further include a conductive additive, a binder, a liquid, and the like. The active material mixture containing a liquid is prepared in a paste form, for example.
As a conductive support agent, what formed carbonaceous materials, such as metal materials, such as Cu and Ni, or graphite, carbon black, acetylene black, and ketjen black, for example is mentioned.
Examples of the binder include thermoplastic resins such as polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), polyethylene, and polypropylene, or ethylene-propylene-diene terpolymer (EPDM), sulfonated EPDM, and styrene butadiene rubber. (SBR), polymers having rubber elasticity such as fluoro rubber, and the like.
Examples of the liquid that can be contained in the active material mixture include common substances such as water and organic solvents. Such a liquid is usually removed by volatilizing the active material mixture before the active material mixture is pressed in the press unit 20.

The press unit 20 includes a press roller 21 that can rotate in accordance with the conveyance of the base material B. The pressing unit 20 presses the active material mixture applied on the base material B with the outer peripheral surface of the press roller 21 to thereby have the base plate A having the base material B and the active material layer C on the base material B. Is configured to be manufactured.
The press roller 21 of the press unit 20 is formed in a columnar shape, and is configured to rotate about the center axis of the column while rotating the active material mixture as a pressed object at a part of the outer peripheral surface. . When the press roller 21 is pressing the active material mixture, the active material mixture is pressed at a part of the outer peripheral surface of the press roller 21 that extends along the rotation axis direction. Further, since the active material mixture is pressed while the press roller 21 rotates, the outer peripheral surface of the press roller 21 is brought into contact with and separated from the active material mixture in the circumferential direction as the press roller 21 rotates. Will repeat.

  The active material layer C is formed on each side of the base material B, for example, as shown in FIG.

  The diameter of the columnar press roller 21 is usually 10 to 100 cm. Moreover, the length of the press roller 21 in the cylindrical axis direction is usually 10 to 100 cm.

  The press unit 20 is configured to press the active material mixture at a linear pressure of 20 to 3000 g / cm.

For example, as illustrated in FIG. 1, the press unit 20 includes a pair of press rollers 21 and 21 that can rotate corresponding to the conveyance of the base material B.
The pair of press rollers 21 and 21 is configured to continuously convey the base material B and the active material mixture in one direction while sandwiching the base material B and the active material mixture between the press rollers 21.
The pair of press rollers 21, 21 applies a pressing force to the active material mixture in the thickness direction of the base material B while the press rollers 21 rotate in opposite directions in correspondence with the conveyance of the base material B, It is comprised so that an active material mixture may be pressed.

The cleaning unit 30 is configured to remove deposits attached to the outer peripheral surface of the press roller 21 by pressing.
Specifically, the cleaning unit 30 includes a pressing member 31 that is pressed against the outer peripheral surface of the press roller 21 and that removes deposits on the outer peripheral surface of the press roller 21 by pressing. The cleaning unit 30 is configured to scrape and remove the adhered matter attached to the outer peripheral surface of the press roller 21 by pressing the pressing member 31 against the outer peripheral surface of the press roller 21.

The cleaning unit 30 is configured to rotate the press roller 21 that can rotate corresponding to the conveyance of the base material B, and to remove the deposits attached to the outer peripheral surface of the press roller 21 while performing the press by the press roller 21. Has been.
The cleaning unit 30 is configured to continue removing the deposit while the press roller 21 rotates at least once.

The cleaning unit 30 is configured to remove deposits on the outer peripheral surface of the press roller 21 with a time interval. In other words, the cleaning unit 30 is configured to repeat the removal of the deposit and not to remove the deposit.
Specifically, the cleaning unit 30 is configured to press the pressing member 31 against the outer peripheral surface of the press roller 21 with a time interval. That is, the cleaning unit 30 is configured to repeatedly press the pressing member 31 against the outer peripheral surface of the press roller 21 and to separate the pressing member 31 from the outer peripheral surface of the press roller 21.

  In the cleaning unit 30, the above time interval, that is, the time from when the removal of the deposit is completed to when the removal of the deposit is started is, for example, 1 to 60 minutes.

  The cleaning unit 30 includes a pressing member 31 that removes deposits on the outer peripheral surface of the press roller 21 by vibrating. That is, the cleaning unit 30 includes a pressing member 31 that vibrates.

  In the cleaning unit 30, the pressing member 31 is disposed so as to press against the outer peripheral surface of the press roller 21 below the rotation center of the press roller 21.

  The pressing member 31 is formed of a material including at least one of an elastic material, a porous material, and a heat resistant material. For example, the pressing member 31 is formed of any one of an elastic material, a porous material, and a heat resistant material. For example, the pressing member 31 is made of a material having all of rubber elasticity, porosity, and heat resistance. The pressing member 31 may further include an abrasive described later in addition to the above materials.

  The elastic material is a material that is elastically deformed by a pressing pressure applied at a temperature to be used. The elastic material is, for example, a material that exhibits rubber elasticity at 20 ° C. The elastic material has, for example, an elastic modulus of 1 to 10 MPa at 20 ° C. and a Poisson's ratio of 0.48 to 0.52.

  The porous material has a plurality of pores formed on the inner and outer surfaces. The porous material has moderate elasticity due to the pores. It is preferable that the porous material is configured to allow the adhering matter adhering to the press roller 21 to enter the pores (concave portions) on the outer surface. Specifically, the porous material is, for example, a sponge shape or a cloth shape. The size of the pores is usually 0.1 to 1000 μm.

  The heat-resistant material is a material that does not melt even by frictional heat generated by pressing the pressing member 31 against the outer peripheral surface of the press roller 21. The melting point of the heat-resistant material is preferably 35 ° C. or higher. Moreover, it is preferable that the thermal decomposition temperature of a heat resistant material is 35 degreeC or more.

The pressing member 31 further includes an abrasive.
The abrasive is inorganic particles. The particle size of the inorganic particles is, for example, 0.1 to 10 μm.

  As the pressing member 31 containing an abrasive, for example, an elastic material, a porous material, or a heat-resistant material is kneaded with an abrasive, an elastic material, a porous material, or a heat-resistant material. The thing etc. which an abrasive | polishing agent adheres to the surface of materials etc. are mentioned. The pressing member 31 may be a member in which at least two of an elastic material, a porous material, and a heat-resistant material are combined and further contain an abrasive or the like.

  The pressing member 31 includes a solvent that dissolves or softens at least a part of the active material mixture. That is, the solvent contained in the pressing member 31 dissolves or softens at least a part of the constituent material of the active material mixture. Such a solvent has, for example, an action of swelling the active material mixture, and softens deposits adhering to the outer peripheral surface of the press roller 21.

  The solvent contained in the pressing member 31 is, for example, a group consisting of a polar organic solvent such as alcohol, acetone, N-methylpyrrolidone, a nonpolar organic solvent containing mineral oil as a main component, and water containing acid or alkali. It is at least one selected from more.

  Examples of the constituent material of the active material mixture that is softened by the solvent include the binder, the conductive auxiliary, and the metal oxide described above.

For example, as shown in FIG. 2, the cleaning unit 30 includes a belt-like pressing member 31 and a plurality of feed rollers 32 that feed the pressing member 31 in the longitudinal direction while bending the pressing member 31. The cleaning unit 30 is configured to change the portion where the pressing member 31 contacts the outer peripheral surface of the press roller 21 by feeding the pressing member 31 with the feed roller 32.
One feed roller 32a (hereinafter also referred to as pressing feed roller 32a) of the plurality of feed rollers 32 changes the distance from the outer peripheral surface of the press roller 21 to change the pressing member 31 to the outer periphery of the press roller 21. The state of pressing against the surface and the state of separating the pressing member 31 from the outer peripheral surface of the press roller 21 are each maintained.

The width of the band-shaped pressing member 31 is usually larger than the width of the active material layer C on the base material B.
Examples of the strip-shaped pressing member 31 include a porous film, a cloth such as a woven fabric and a non-woven fabric, and the like.
The band-shaped pressing member 31 is formed of, for example, a polymer compound such as a natural polymer compound or a synthetic polymer compound, a metal, or the like, and may further include inorganic particles or inorganic fibers.
The material which forms the strip | belt-shaped pressing member 31 is a material containing at least any one of the elastic material mentioned above, a porous material, and a heat resistant material, for example.

Each feed roller 32 is formed in a cylindrical shape, for example. In addition, the length of each feed roller 32 in the cylindrical axis direction is usually longer than the width of the belt-like pressing member 31.
Each feed roller 32 is arranged such that the cylinder axis direction is parallel to the cylinder axis direction of the press roller 21.
Each feed roller 32 is configured to abut on the pressing member 31 at a part of the outer peripheral surface and rotate to feed the pressing member 31 in one longitudinal direction.
Each feed roller 32 is configured to change the direction in which the pressing member 31 is fed by bending the pressing member 31 by abutting with a part of the pressing member 31.
The diameter of each feed roller 32 is usually 0.01 to 0.5 times the diameter of the press roller 21. The length of each feed roller 32 in the cylinder axis direction is generally substantially the same as the length of the press roller 21 in the cylinder axis direction.

The plurality of feed rollers 32 are arranged so that the cylindrical axis directions of the feed rollers 32 are parallel to each other. The plurality of feed rollers 32 are configured to feed the pressing member 31 in one direction in the longitudinal direction by rotating while being in contact with the pressing member 31 at a part of the outer peripheral surface.
The plurality of feed rollers 32 are configured to change the direction in which the pressing member 31 is fed by each feed roller 32.
The feed rollers 32 that are adjacent to each other via the pressing member 31 are configured to apply tension to the belt-shaped pressing member 31 in the longitudinal direction.
That is, the plurality of feed rollers 32 are pressed when viewed from one side of the feed roller 32 in the cylinder axis direction while changing the direction in which the push member 31 is fed while applying tension to the push member 31 in the longitudinal direction. It is comprised so that the contact member 31 may be sent to a zigzag.

  The pressing feed roller 32a is configured to change the distance from the press roller 21 by using, for example, hydraulic drive.

  The cleaning unit 30 includes, for example, a belt-like pressing member 31 and a plurality of feed rollers 32 as described above. The cleaning unit 30 having such a configuration is configured to move the pressing member 31 in the longitudinal direction by the rotation of the plurality of feed rollers 32 and to change the portion where the pressing member 31 contacts the outer peripheral surface of the press roller 21. . The cleaning unit 30 is configured to move the pressing member 31 in the longitudinal direction in a state where the pressing member 31 is separated from the outer peripheral surface of the press roller 21.

  The cleaning unit 30 further includes a feeding mechanism that feeds the band-shaped pressing member 31. The cleaning unit 30 is configured to feed the pressing member 31 by rotating each feeding roller 32 by moving the pressing member 31 in the longitudinal direction by the feeding mechanism.

  The electrode plate manufacturing apparatus 1 according to the present embodiment includes a monitoring unit 40 that detects adhesion on the outer peripheral surface by monitoring the outer peripheral surface of the press roller 21 as shown in FIG. 2, for example. The cleaning unit 30 is configured to remove the deposit on the outer peripheral surface when the deposit on the surface is detected.

  For example, the monitoring unit 40 monitors the deposit on the outer peripheral surface of the rotating press roller 21 by an optical measurement method, and detects a deposit exceeding a specified amount, and the detector exceeds the specified amount. And a transmitter that sends a signal instructing the cleaning unit 30 to remove the deposit when the deposit is detected.

As the detector, for example, a commercially available general detector that performs optical measurement using laser light or the like is employed. The detector measures the deposits on the outer peripheral surface, and determines whether the deposits on the outer peripheral surface of the press roller 21 has reached a specified amount by a preset program or an appropriately set program. It is configured.
As the transmitter, for example, a cable for sending an electrical signal or a signal transmitter for sending a radio signal is adopted. The transmitter is configured to send a signal for starting the removal of the deposit to the cleaning unit 30 when the detector determines that the amount of the deposit on the outer peripheral surface has reached a specified amount.

  The electrode plate manufacturing apparatus 1 of the present embodiment further includes a discharge unit 60 that discharges the deposits removed from the outer peripheral surface of the press roller 21 by the cleaning unit 30 as shown in FIGS. 1 and 2, for example.

  The discharge unit 60 includes, for example, a tray that temporarily receives the deposit that has been removed from the outer peripheral surface of the press roller 21 and has dropped from above, and a discharge path that discharges the deposit from the tray to the outside of the apparatus. The discharge path is formed by, for example, a discharge pipe, and is configured to decompress the inside of the discharge pipe by sucking air in the pipe toward the outside of the apparatus by a vacuum pump.

  The electrode plate manufacturing apparatus 1 of the present embodiment further includes a wiping portion 50 that wipes the outer peripheral surface of the press roller 21 after pressing the pressing member 31 as shown in FIG. 1, for example.

The wiping unit 50 includes, for example, a wiping member that wipes the outer peripheral surface of the press roller 21. For example, the wiping member is formed in the same manner as the pressing member 31 described above.
The wiping member of the wiping portion 50 is usually arranged so as to wipe the outer peripheral surface of the press roller 21 above the rotation center of the press roller 21.
The wiping member of the wiping portion 50 normally keeps in contact with the outer peripheral surface of the press roller 21 while the active material mixture is being pressed by the press roller 21.

  The electrode plate manufacturing apparatus 1 of the present embodiment further includes a supply unit 70 that supplies the above-described solvent to the pressing member 31 as shown in FIG. 1, for example.

  The supply unit 70 includes, for example, a solvent tank that stores a solvent therein. The supply unit 70 is configured to supply the solvent from the solvent tank to the pressing member 31. The solvent supplied to the pressing member 31 can be impregnated in the pressing member 31, for example. Moreover, the solvent supplied to the pressing member 31 can remain on the surface of the pressing member 31, for example.

The electrode plate manufacturing apparatus 1 of the present embodiment is configured as described above.
In the electrode plate manufacturing apparatus 1 of the present embodiment, the active material mixture on the base material B that is continuously transported in one direction by the transport unit 10 is pressed by the rotatable press roller 21 of the press unit 20. The The active material mixture may come into contact with the outer peripheral surface of the press roller 21 by pressing. However, in the electrode plate manufacturing apparatus 1 of the present embodiment, while the pressing by the press roll 21 is performed, the adhering matter attached to the outer peripheral surface of the press roll 21 is removed. The active material mixture on the subsequent substrate is pressed. Therefore, the active material mixture is uniformly pressed without stopping the rotation of the press roller 21. Therefore, a good electrode plate is manufactured continuously.

  Then, the manufacturing method of the electrode plate which manufactures an electrode plate by using the manufacturing apparatus of the electrode plate mentioned above is demonstrated.

  The electrode plate manufacturing method described above is applied onto the base material B by continuously transporting the base material B in one direction and rotating the outer surface of the press roller 21 corresponding to the transport of the base material B. The active material mixture adhered to the outer peripheral surface of the press roller 21 while producing the electrode plate having the active material layer C on the base material B by pressing the active material mixture Removing deposits.

The said conveyance can be performed by the conveyance part 10 mentioned above.
The electrode plate can be produced by the press unit 20 described above.
The deposits can be removed by the cleaning unit 30 described above.

In the above electrode plate manufacturing method, for example, deposits on the outer peripheral surface of the press roller 21 are removed with a time interval. Further, for example, the pressing member 31 is pressed against the outer peripheral surface of the press roller 21 to remove the deposits on the outer peripheral surface of the press roller 21.
Specifically, in the above-described electrode plate manufacturing method, for example, the pressing member 31 is pressed against the outer peripheral surface of the press roller 21 with a time interval, thereby removing deposits on the outer peripheral surface of the press roller 21. .
More specifically, in the above-described electrode plate manufacturing method, for example, the pressing member 31 of the press unit 20 is vibrated while being pressed against the outer peripheral surface of the press roller 21, thereby depositing on the outer peripheral surface of the press roller 21. Remove. Further, for example, the pressing unit 20 presses the pressing member 31 against the outer peripheral surface of the press roller 21 below the rotation center of the press roller 21, thereby removing the deposits on the outer peripheral surface of the press roller.

The above-described electrode plate manufacturing method further includes detecting adhering matter on the outer peripheral surface by monitoring the outer peripheral surface of the press roller 21.
The adhering matter can be detected by the monitoring unit 40 described above.

In the method for manufacturing the electrode plate, the deposits removed by removing the deposits on the outer peripheral surface of the press roller 21 are discharged, and the outer peripheral surface of the press roller 21 after the pressing member 31 is pressed. And supplying the above-described solvent to the pressing member 31 is further provided.
The discharge can be performed by the discharge unit 60 described above.
Wiping the outer peripheral surface of the press roller 21 can be performed by the wiping unit 50 described above.
The supply of the solvent can be performed by the supply unit 70 described above.

  In the above electrode plate manufacturing method, the active material mixture on the base material B continuously conveyed in one direction by conveyance is pressed by a rotatable press roller 21. The active material mixture and the outer peripheral surface of the press roller 21 come into contact with each other by pressing. Due to the contact, a part of the constituent material of the active material mixture may adhere to the outer peripheral surface of the press roller 21. However, in the above-described electrode plate manufacturing method, the attached material adhered to the outer peripheral surface of the press roll 21 is removed while being pressed by the press roll 21. Press the active material mixture above. Therefore, the active material mixture can be pressed uniformly without stopping the rotation of the press roller 21. Therefore, a good electrode plate A can be manufactured continuously.

  In the above-described electrode plate manufacturing apparatus and manufacturing method, the active material mixture is pressed into a predetermined thickness by pressing the active material mixture in the press unit 20, and the active material layer C is formed into the base material B. Formed on top.

  In the above electrode plate manufacturing apparatus and manufacturing method, the press unit 20 includes a pair of press rollers 21 and 21. By pressing the active material mixture with a pair of press rollers 21 and 21 of the press unit 20, an electrode plate A having active material layers C formed on both sides of the base material B as shown in FIG. be able to.

In the above-described electrode plate manufacturing apparatus and manufacturing method, the cleaning unit 30 removes deposits on the outer peripheral surface of the press roller 21 with a time interval. Thereby, the outer peripheral surface of the press roller can be kept clean without removing extraneous matter more than necessary.
Further, the wear of the pressing member 31 caused by pressing the pressing member 31 against the outer peripheral surface of the press roller 21 is suppressed by the time that the pressing member 31 is not pressed against the outer peripheral surface of the press roller 21. Can do. Accordingly, since the frequency of replacing the pressing member 31 can be reduced, the frequency of stopping the operation of the apparatus can be reduced. Thereby, the electrode plate A can be manufactured continuously.
Further, the cleaning unit 30 generates frictional heat generated by pressing the pressing member 31 against the outer peripheral surface of the press roller 21 by removing adhering substances on the outer peripheral surface of the press roller 21 with a time interval. Can be suppressed.

In the above-described electrode plate manufacturing apparatus and manufacturing method, the cleaning unit 30 includes a pressing member 31 that vibrates.
As the pressing member 31 vibrates, the deposits on the outer peripheral surface of the press roller 21 can be more reliably removed. That is, the adhering matter adhering to the outer peripheral surface of the press roller 21 can be more reliably removed by the vibration of the pressing member 31.

In the above-described electrode plate manufacturing apparatus and manufacturing method, in the cleaning unit 30, the pressing member 31 is disposed so as to press the outer peripheral surface of the press roller 21 below the rotation center of the press roller 21.
With such a configuration, the deposit removed by the pressing member 31 does not adhere again to the outer peripheral surface of the press roller 21 even if it falls, so that the deposit adhering to the outer peripheral surface of the press roller 21 is more reliably removed. Can do.

In the above-described electrode plate manufacturing apparatus and manufacturing method, the pressing member 31 is made of a material containing an elastic material, so that the pressing member 31 pressed against the outer peripheral surface of the press roller 21 is the press roller. Since it deforms following the movement of the outer peripheral surface of 21, the amount of time of pressing increases by the amount of deformation and tracking, and the deposits on the outer peripheral surface of the press roller 21 can be more reliably removed.
In addition, since the pressing member 31 is formed of a porous material, pores are exposed on the surface due to wear caused by the pressing. Further, at least a part of the deposit removed by the pressing member 31 enters the exposed holes. Therefore, it is possible to suppress the removed deposit from adhering to the outer peripheral surface of the press roller 21 again.
Further, since the pressing member 31 is formed of a material containing a heat resistant material, the pressing member 31 scrapes off the adhering matter even when the active material mixture and the press roller 21 are at a relatively high temperature. It has sufficient strength. Therefore, the adhering material can be reliably removed by the pressing member 31 even at a relatively high temperature.
Further, since the pressing member 31 contains an abrasive, the deposits attached to the outer peripheral surface of the press roller 21 can be more reliably removed, and the pressing member 31 can be more reliably removed with a desired pressure. It can be pressed against the outer peripheral surface.

  In the above-described electrode plate manufacturing apparatus and manufacturing method, the pressing member 31 includes a solvent that dissolves or softens at least a part of the active material mixture. Such a solvent can dissolve or soften a deposit (a part of the constituent material of the active material mixture) adhering to the outer peripheral surface of the press roller 21. The amount of deposits can be more reliably removed by the pressing member 31 as much as the deposits are dissolved or softened. Accordingly, it is possible to more sufficiently remove deposits attached to the outer peripheral surface of the press roller 21.

  In the above electrode plate manufacturing apparatus and manufacturing method, the pressing feed roller 32a presses the pressing member 31 against the outer peripheral surface of the press roller 21 by changing the distance from the outer peripheral surface of the press roller 21; The state in which the pressing member 31 is separated from the outer peripheral surface of the press roller 21 is maintained. Thereby, the pressing member 31 can be pressed against the outer peripheral surface of the press roller 21 with a time interval.

In the above-described electrode plate manufacturing apparatus and manufacturing method, the pressing member 31 is moved in the longitudinal direction by the rotation of the plurality of feeding rollers 32 by the cleaning unit 30 having the belt-shaped pressing member 31 and the plurality of feeding rollers 32. The portion where the pressing member 31 comes into contact with the outer peripheral surface of the press roller 21 can be changed. Further, the pressing member 31 can be moved in the longitudinal direction in a state where the pressing member 31 is separated from the outer peripheral surface of the press roller 21.
Accordingly, even if a part of the pressing member 31 is pressed against the outer peripheral surface of the press roller 21, the pressing member 31 is moved in the longitudinal direction so that the portion of the pressing member 31 that is not yet pressed is pressed. It can be pressed against the outer peripheral surface of the roller 21.
Specifically, even if the pressing member 31 is not replaced, the pressing portion of the pressing member 31 (the portion that hits the press roller 21) can be changed by the plurality of feed rollers 32. As a result, when the pressing member 31 is pressed, it is possible to press a portion that has not been pressed yet and has maintained cleaning performance. Therefore, even if it does not stop conveyance of the base material B with replacement | exchange of the pressing member 31, the cleaning by the pressing member 31 can fully be performed and the favorable electrode plate A can be manufactured continuously.

  In the above-described electrode plate manufacturing apparatus and manufacturing method, the monitoring unit 40 described above monitors the outer peripheral surface of the press roller 21 to detect the deposit on the outer peripheral surface. By monitoring the deposit on the outer peripheral surface of the press roller 21 with a detector, the degree of the deposit on the outer peripheral surface is checked, and when the deposit exceeding the specified amount is detected, the transmitter transmits the deposit to the cleaning unit 30. Removal can be instructed, and the cleaning unit 30 can automatically start removing the deposit on the press roller 21. Further, the outer peripheral surface of the press roller 21 can be kept clean without removing extraneous matter more than necessary.

  In the above-described electrode plate manufacturing apparatus and manufacturing method, deposits removed from the outer peripheral surface of the press roller 21 can be prevented from accumulating in the apparatus by the discharge unit 60 described above. Specifically, the deposit once received by the tray can be taken into the decompressed discharge pipe and automatically discharged out of the apparatus.

  In the above-described electrode plate manufacturing apparatus and manufacturing method, even if a part of the pressing member 31 is worn by the wiping portion 50 and is attached to the outer peripheral surface of the press roller 21 by the wiping portion 50 described above, the adhered matter due to wear Can be removed by the wiping portion 50. Further, the deposit that has not been removed by the cleaning unit 30 can be removed by the wiping unit 50. In addition, since the liquid can be wiped by the wiping unit 50 described above, the liquid contained in the active material mixture (liquid residue attached to the outer peripheral surface of the press roller 21) can also be removed.

  In the above-described electrode plate manufacturing apparatus and method, supply of the solvent to the pressing member 31 by the supply unit 70 described above can prevent the pressing member 31 from running out of the solvent. Accordingly, it is possible to more sufficiently remove deposits attached to the outer peripheral surface of the press roller 21.

  The electrode plate A manufactured by the above-described manufacturing method is used not only for electrodes of power storage elements such as non-aqueous electrolyte secondary batteries, but also for example for electrodes of capacitors. Examples of the electricity storage device in which the manufactured electrode plate A is used include non-aqueous electrolyte secondary batteries such as lithium ion secondary batteries. The electrical storage element in which the manufactured electrode plate A is used may be a capacitor, specifically, a lithium ion capacitor or an ultracapacitor.

  The electrode plate A manufactured by the above manufacturing method is further processed, for example, and used as an electrode such as a positive electrode or a negative electrode constituting a nonaqueous electrolyte secondary battery.

  The electrode plate manufacturing apparatus and the electrode plate manufacturing method of the present invention are not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention. is there. For example, the configuration of another embodiment can be added to the configuration of a certain embodiment, and a part of the configuration of a certain embodiment can be replaced with the configuration of another embodiment. Furthermore, a part of the configuration of an embodiment can be deleted.

For example, the electrode plate manufacturing apparatus of the above embodiment includes the application unit 80. However, as an aspect of the electrode plate manufacturing apparatus of the present invention, an aspect without an application unit is employed. .
The electrode plate manufacturing apparatus that does not include the coating unit 80 is configured such that, for example, the unwinding roller 11 of the transport unit 10 sends out the base material B and the active material mixture already applied onto the base material B together. ing.
Similarly, as an aspect of the manufacturing method of the electrode plate of the present invention, an aspect in which the active material mixture is not applied to the base material B before being sent to the press section 20 is employed. That is, a mode in which the base material B on which the active material mixture has been applied in advance is transported from the unwind roller 11 of the transport unit 10 is employed.

Further, in the electrode plate manufacturing apparatus of the above embodiment, the cleaning unit 30 has the band-shaped pressing member 31, but as another aspect of the electrode plate manufacturing apparatus of the present invention, a rectangular parallelepiped shape, A mode in which the cleaning unit 30 includes the pressing member 31 formed in a columnar shape or a lump shape such as a plate shape is employed.
For example, as illustrated in FIG. 4, the massive pressing member 31 is formed so as to be pointed in a direction in which the pressing member 31 is pressed against the press roller 21.
Similarly, as another aspect of the manufacturing method of the electrode plate of the present invention, the pressing member 31 formed in a block shape such as a rectangular parallelepiped shape, a columnar shape, or a plate shape is pressed against the press roller 21, A mode of removing the deposit on the surface is adopted.

  Moreover, in the manufacturing apparatus and manufacturing method of the electrode plate of said embodiment, the electrode plate A which has the base material B and the active material layer C each distribute | arranged to the both surfaces side of the base material B as shown in FIG. In another aspect of the electrode plate manufacturing apparatus and method of the present invention, for example, an electrode plate A having an active material layer C disposed on one side of the base material B is manufactured.

  In addition, the manufacturing method of the electrode plate of this invention can be implemented even if it does not use the manufacturing apparatus of the electrode plate of said embodiment.

1: Electroplate manufacturing equipment,
10: Conveying section,
11: Unwinding roller, 12: Winding roller,
20: Press section
21: Press roller,
30: Cleaning section,
31: Pressing member, 32: Feed roller (32a: Press feed roller),
40: monitoring unit,
50: Wiping part,
60: discharge part,
70: Supply section,
80: application part,
A: Electrode plate, B: Base material, C: Active material layer.

Claims (10)

Conveying the substrate continuously in one direction;
An electrode plate having an active material layer on the base material is pressed by pressing the active material mixture applied on the base material with an outer peripheral surface of a press roller that can rotate in accordance with the transport of the base material. Making,
A method for producing an electrode plate, comprising: removing the adhering material of the active material mixture adhering to the outer peripheral surface of the press roller while performing the pressing.   The method for manufacturing an electrode plate according to claim 1, wherein the pressing member is pressed against the outer peripheral surface of the press roller to remove deposits on the outer peripheral surface of the press roller.   The manufacturing method of the electrode plate according to claim 2, wherein the pressing member is vibrated while being pressed against the outer peripheral surface of the press roller to remove deposits on the outer peripheral surface of the press roller.   The pole according to claim 2 or 3, wherein the pressing member is pressed against the outer peripheral surface of the press roller below the rotation center of the press roller, thereby removing deposits on the outer peripheral surface of the press roller. A manufacturing method of a board.   The method for manufacturing an electrode plate according to any one of claims 1 to 4, further comprising detecting adhering matter on the outer peripheral surface by monitoring the outer peripheral surface of the press roller.   The pressing member formed of a material including at least one of a material including an elastic material, a material including a porous material, and a material including a heat resistant material is pressed against the outer peripheral surface of the press roller. The method for producing an electrode plate according to any one of claims 2 to 5, wherein deposits on the outer peripheral surface of the press roller are removed.   The electrode plate according to claim 2, wherein deposits on the outer peripheral surface of the press roller are removed by pressing the pressing member containing an abrasive against the outer peripheral surface of the press roller. Manufacturing method.   The deposit on the outer peripheral surface of the press roller is removed by pressing the pressing member containing a solvent that dissolves or softens at least a part of the active material mixture against the outer peripheral surface of the press roller. The manufacturing method of the electrode plate of any one of thru | or 7.   The method for manufacturing an electrode plate according to claim 8, comprising supplying the solvent to the pressing member. A transport unit for continuously transporting the substrate in one direction;
A press unit having a press roller that can rotate in accordance with the conveyance of the base material, the active material mixture applied on the base material being pressed on the outer peripheral surface of the press roller on the base material. A press part for producing an electrode plate having an active material layer on the substrate,
An apparatus for manufacturing an electrode plate, comprising: a cleaning unit that removes deposits of an active material mixture adhered to an outer peripheral surface of the press roller by the pressing while performing the pressing.

Images