WO2018051850A1 - Battery electrode manufacturing method, battery electrode manufacturing device, battery electrode, and battery - Google Patents

Battery electrode manufacturing method, battery electrode manufacturing device, battery electrode, and battery Download PDF

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Publication number
WO2018051850A1
WO2018051850A1 PCT/JP2017/031970 JP2017031970W WO2018051850A1 WO 2018051850 A1 WO2018051850 A1 WO 2018051850A1 JP 2017031970 W JP2017031970 W JP 2017031970W WO 2018051850 A1 WO2018051850 A1 WO 2018051850A1
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Prior art keywords
valve
coating
slurry
opening
battery electrode
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PCT/JP2017/031970
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French (fr)
Japanese (ja)
Inventor
秀明 高松
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Ｎｅｃエナジーデバイス株式会社
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Priority to JP2018539644A priority Critical patent/JPWO2018051850A1/en
Publication of WO2018051850A1 publication Critical patent/WO2018051850A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/26—Processes for applying liquids or other fluent materials performed by applying the liquid or other fluent material from an outlet device in contact with, or almost in contact with, the surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/04—Processes of manufacture in general
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/139—Processes of manufacture
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a battery electrode manufacturing method and a battery electrode manufacturing apparatus manufactured by applying a slurry such as an active material to a sheet base material when manufacturing an electrode of a laminate-type lithium ion secondary battery.
  • the present invention relates to a battery electrode manufactured by the above-described method and a battery including such a battery electrode.
  • Lithium ion secondary batteries can be reduced in size and weight and have a high energy density, so they are used for portable device power supplies, electric bicycles, electric vehicles, and other commercial power backup applications. Various proposals for improving performance can be seen.
  • a slurry containing active material particles is applied continuously or intermittently to the surface of a strip-shaped current collector, dried, and then compressed, so that the active material particles mutually and the active material particles
  • the battery performance is improved by reducing the electrical contact resistance with the current collector and further increasing the energy density.
  • the positive electrode active material layer contains lithium such as lithium manganese composite oxide particles.
  • a composite oxide is used.
  • Patent Document 1 Japanese Patent Laid-Open No. 2015-26471. Is disclosed.
  • FIG. 9 is a diagram schematically showing the coating apparatus 200.
  • FIG. 10 is a diagram for explaining the operation of the coating valve 240 and the return valve 250 in the coating apparatus 200.
  • the flow path of the slurry 205 of the coating apparatus 200 in intermittent coating has a die head 260, a coating valve 240 connected to the die head 260, a pump 230, and a tank 220 for storing the slurry 205. Moreover, it has the return valve 250 located between the said tank 220 and the coating valve 240.
  • the tank 220 is a storage unit for the slurry 205 and a supply unit for supplying the slurry 205 to the die head 260.
  • a tank 220 is preferably configured to receive the supply of the slurry 205 from a main tank (not shown) or the like.
  • the tank 220 is connected to the die head 260 by a pipe 210.
  • the pipe 210 is provided with a pump 230 which is a liquid feeding means. By operating the pump 230, the slurry 205 is sent from the tank 220 to the die head 260 side (in the direction of the arrow in the figure).
  • the piping 210 in the coating apparatus 200 is branched, the branched piping 210 on one side is connected to the die head 260, and the branched piping 210 on the other side is connected to the tank 220.
  • a coating valve 240 is provided in the middle of the branched pipe 210 on one side.
  • a return valve 250 is provided in the middle of the branched pipe 210 on the other side. When the return valve 250 is open, the slurry 205 can be returned to the tank 220 side. Further, when the coating valve 240 is in the open state, the slurry 205 is supplied to the die head 260.
  • the die head 260 for example, a so-called slot die is used.
  • the die head 260 is provided with an inlet 261 through which the slurry 205 is supplied from the pipe 210.
  • the die head 260 is provided with a liquid reservoir called a manifold 263.
  • the slurry 205 supplied from the inlet 261 is discharged from the coating outlet 265 through the manifold 263.
  • the coating outlet 265 has a slit shape with a constant width.
  • the sheet base material 203 is stretched around the back roll 270 in a state where a predetermined tension is applied.
  • the coating apparatus 200 has a conveying means (not shown) such as a rotating roller, and the sheet base material 203 is conveyed by the conveying means in the direction of the arrow in the figure. .
  • the back roll 270 rotates.
  • the coating valve 240 When the coating valve 240 is in the open state, the slurry 205 is coated from the coating outlet 265, and the coating film 207 is formed on the sheet base material 203. A portion where the coating film 207 is formed is referred to as a coating portion. On the other hand, when the coating valve 240 is in the closed state, the slurry 205 is not applied, and an uncoated portion is formed on the sheet base material 203. According to such a coating apparatus 200, the coated part and the uncoated part can be alternately formed on the sheet base material 203. Such a coating method using the coating apparatus 200 is referred to as intermittent coating.
  • the coating valve 240 can accurately change the opening and closing of the valve even during the application of the slurry 205, and realizes a complicated coating state by controlling the flow path of the slurry in combination with the operation of the return valve 250. It becomes possible.
  • the coating valve 240 and the return valve 250 have a common structure, but their operations are independent.
  • the coating valve 240 and the return valve 250 are provided with valve seats 243 and 253 having through holes 242 and 252 at the center inside the valve boxes 241 and 251, and can be contacted and separated from the valve seats 243 and 253.
  • Valve bodies 247 and 257 are arranged.
  • Shafts 246 and 256 are integrally formed on the valve bodies 247 and 257, and cylinders 245 and 255 are connected to the shafts 246 and 256, respectively.
  • the valve bodies 247 and 257 are moved through the shafts 246 and 256 in a direction approaching or leaving the valve seats 243 and 253 (vertical direction in the drawing).
  • the through holes 242 and 252 are opened, and the coating valve 240 and the return valve 250 are opened.
  • the opening degree (opening amount) of the coating valve 240 and the return valve 250 changes according to the distance between the valve bodies 247 and 257 from the valve seats 243 and 253, and passes through the coating valve 240 and the return valve 250.
  • the amount of slurry varies.
  • the coating valve 240 is opened at the timing when the formation of the coating film 207 is started, and at the same time, the return valve 250 is closed, and the slurry 205 is supplied from the coating valve 240 to the die head 260, The slurry 205 is applied to the sheet base material 203 from the application outlet 265 of 260.
  • the valve body 247 is raised and separated from the through hole 242, and in the return valve 250, the valve body 257 is lowered and the through hole 252. The operation that closes the screen is performed.
  • the battery electrode manufacturing method includes a tank for storing slurry and a sheet substrate conveyed by a roller.
  • a head having a discharge outlet for discharging; a coating valve for controlling the amount of slurry flowing into the head by opening and closing; a return valve for controlling the amount of slurry flowing into the tank by opening and closing; and the tank
  • a pipe for supplying slurry fed by pressure to both the coating valve and the return valve, and a battery electrode manufactured by a coating apparatus, wherein the valve body of the return valve is against the valve seat
  • the battery electrode manufacturing method according to the present invention is a valve in which the valve body of the coating valve operates perpendicularly to the valve seat.
  • the coating valve opening when the coating valve opening is increased from 0%, the return valve opening is decreased from 100%.
  • the battery electrode manufacturing method according to the present invention provided a period during which the opening degree of the coating valve was kept constant while the opening degree of the coating valve was increased from 0% to 100%.
  • the battery electrode manufacturing method according to the present invention may be configured such that when the coating valve opening degree is 0%, the opening degree of the coating valve is set so that the opening degree of the return valve is 100%. Decrease and increase the opening of the return valve.
  • the battery electrode manufacturing apparatus includes a tank for storing slurry, a head having a coating outlet for discharging slurry to a sheet substrate conveyed by a roller, and the head by opening and closing.
  • a coating valve that controls the amount of slurry flowing into the tank
  • a return valve that controls the amount of slurry flowing into the tank by opening and closing, and a slurry fed by pressure from the tank to the coating valve and the return valve.
  • An apparatus for manufacturing a battery electrode wherein the valve body of the coating valve is a valve that operates perpendicularly to a valve seat, and the valve body of the return valve is a valve seat Is a valve that operates in a horizontal or rotational direction.
  • the battery electrode manufacturing apparatus reduces the opening degree of the return valve from 100% when the opening degree of the coating valve is increased from 0%.
  • the battery electrode manufacturing apparatus provided a period during which the opening degree of the coating valve was kept constant while the opening degree of the coating valve was increased from 0% to 100%.
  • the battery electrode manufacturing apparatus is configured so that the opening degree of the coating valve is set so that the opening degree of the return valve becomes 100% when the opening degree of the coating valve becomes 0%. Decrease and increase the opening of the return valve.
  • the battery electrode according to the present invention was formed by using the slurry for intermittently provided on the sheet base material by using the battery electrode manufacturing method described above.
  • the active material layer includes a first film thickness portion having a substantially constant thickness and a second film thickness portion having a thickness smaller than the first film thickness portion.
  • the second film thickness portion was disposed at the boundary between the portion where the material layer was provided and the portion where the active material layer was not provided.
  • an insulating member was arranged at the boundary between the portion where the active material layer was provided and the portion where the active material layer was not provided.
  • the battery according to the present invention uses any one of the battery electrodes described above as either a positive electrode or a negative electrode, an electrode laminate in which the positive electrode and the negative electrode are stacked via a separator, an electrolyte solution, Is housed inside the exterior material, and a positive electrode lead tab conductively connected to the positive electrode and a negative electrode lead tab conductively connected to the negative electrode are drawn out of the exterior material.
  • the battery electrode manufacturing method / manufacturing apparatus is a valve in which the valve body of the return valve operates in a horizontal or rotational direction with respect to a valve seat, and the movement of the valve body when the return valve is opened and closed Therefore, according to the battery electrode manufacturing method / manufacturing apparatus of the present invention, the slurry in the die head accompanying the operation of the coating valve and the return valve is not affected. Pressure fluctuations can be suppressed, the amount of slurry applied from the die head can be easily controlled, the desired coating film can be obtained, and the performance of the lithium ion secondary battery can be improved. Can do.
  • the performance of the battery can be improved.
  • FIG. 6 is a diagram illustrating a stacking order of components in an electrode stack 60. It is a figure which shows the structure of the electrode laminated body 60 sealed in the laminate film exterior material 80.
  • FIG. FIG. 3 is a perspective view of a battery 100 that is packaged with a laminate film packaging material 80.
  • FIG. 4 is a diagram illustrating a manufacturing process of positive electrode 20 in battery 100.
  • FIG. 5 is a view showing an X-X ′ cross section in FIG. It is a figure explaining operation
  • FIG. 1 It is a figure explaining operation
  • FIG. 1 It is a figure explaining operation
  • the battery 100 composed of battery electrodes manufactured by the manufacturing method and manufacturing apparatus of the present invention will be described.
  • FIG. 1 illustrates the stacking order of components in an electrode stack 60 obtained by stacking a positive electrode 20, a negative electrode 30 (battery electrode) and a separator 40 manufactured by the manufacturing method and manufacturing apparatus of the present invention. It is a figure to do.
  • FIG. 2 is a diagram showing the configuration of the electrode laminate 60 sealed in the laminate film exterior material 80.
  • FIG. 3 is a perspective view of the battery 100 covered with a laminate film covering material 80.
  • a lithium ion secondary battery which is a kind of electrochemical element in which charging and discharging are performed by moving lithium ions between the negative electrode 30 and the positive electrode 20, will be described as an example.
  • the present invention can also be applied to other types of batteries.
  • a battery 100 according to an embodiment of the present invention includes an electrode laminate 60 in which a plurality of positive electrodes 20 and a plurality of negative electrodes 30 are laminated via a separator 40, and an electrolyte solution (not shown) having a rectangular laminate film exterior material. The structure is accommodated in 80.
  • FIG. 1 is a diagram for explaining the stacking order of the components in the electrode stack 60. As shown in FIG. 1, the positive electrode 20, the negative electrode 30, and the separator 40 are used in configuring the electrode laminate 60.
  • the positive electrode 20 has a rectangular positive electrode current collector body portion 22 and a strip-like positive electrode current collector terminal portion 24 extending from the positive electrode current collector body portion 22.
  • the entire current collector of the positive electrode 20 is made of a thin aluminum plate or the like, and the positive electrode current collector main body 22 is coated with a positive electrode active material layer 26 containing a lithium nickel composite oxide or the like on both sides.
  • the positive electrode current collector terminal portion 24 is an uncoated portion where the positive electrode active material layer 26 is not applied.
  • the negative electrode 30 has a rectangular negative electrode current collector body 32 and a strip-shaped negative electrode current collector terminal 34 extending from the negative electrode current collector main body 32.
  • the entire current collector of the negative electrode 30 is made of a thin plate-like nickel plate or copper plate, and the negative electrode current collector main body 32 is coated with a negative electrode active material layer 36 containing graphite or the like on both sides.
  • the negative electrode current collector terminal portion 34 is an uncoated portion where the negative electrode active material 36 is not applied.
  • materials that can form the positive electrode active material layer 26 are, for example, LiCoO 2 , LiNiO 2 , LiNi (1-x) CoO 2 , LiNi x (CoAl) (1-x) O 2 , Li 2 MnO 3.
  • -LiMO 2 (where M is a transition metal, and examples thereof include Ni, Co, Fe, Cr, etc.), layered oxide materials such as LiNi 1/3 Co 1/3 Mn 1/3 O 2 And spinel materials such as LiMn 2 O 4 , LiMn 1.5 Ni 0.5 O 4 , LiMn (2-x) M x O 4 , olivine materials such as LiMPO 4 , Li 2 MPO 4 F, Li 2 MSiO 4 fluorinated olivine-based material, such as F, such as vanadium oxide-based materials such as V 2 O 5 and the like, can be used singly or a mixture of two or more of these .
  • materials that can form the negative electrode active material layer 36 include carbon materials such as graphite, amorphous carbon, diamond-like carbon, fullerene, carbon nanotube, and carbon nanohorn, lithium metal materials, silicon, tin, and the like. Alloy-based materials, oxide-based materials such as Nb 2 O 5 and TiO 2 , or composites thereof can be used.
  • the material that can constitute the positive electrode active material layer 26 and the negative electrode active material layer 36 may be a mixture to which a binder, a conductive additive, and the like are appropriately added.
  • a conductive support agent 1 type in carbon black, carbon fiber, or graphite, or a combination of 2 or more types can be used.
  • the binder polyvinylidene fluoride (PVDF), styrene butadiene rubber, polytetrafluoroethylene, carboxymethyl cellulose, modified acrylonitrile rubber particles, and the like can be used.
  • the material of the current collector of the positive electrode 20 aluminum, stainless steel, nickel, titanium, or an alloy thereof can be used, and aluminum is particularly preferable. Further, as a material for the current collector of the negative electrode 30, copper, stainless steel, nickel, titanium, or an alloy thereof can be used.
  • an insulating member 28 is disposed at the end on the positive electrode current collector terminal portion 24 side and a part of the positive electrode current collector terminal portion 24.
  • the insulating member 28 covers the boundary between the positive electrode current collector body portion 22 to which the positive electrode active material layer 26 is applied and the positive electrode current collector terminal portion 24 to which the positive electrode active material layer 26 is not applied. It is the structure that is called.
  • the positive electrode 20 is laminated with the negative electrode 30 through the separator 40 to form an electrode laminate 60.
  • the active material layers of the positive electrode 20 and the negative electrode 30 are in contact with each other, and the positive electrode 20 and the negative electrode 30 are short-circuited. Is provided.
  • the insulating member 28 as described above, polyimide, glass fiber, polyester, polypropylene, or a material containing these can be used. Heat is applied to the tape-shaped resin member made of the above-described material at the boundary between the portion where the positive electrode active material layer 26 is applied and the portion where the positive electrode active material layer 26 is not applied.
  • the insulating member 28 can be formed by applying to the boundary and then drying.
  • the separator 40 is a rectangular sheet-like member that can be impregnated with an electrolytic solution, such as a porous film, a microporous film (microporous film), a nonwoven fabric, or a woven fabric, which is made of a thermoplastic resin such as polyolefin.
  • an electrolytic solution such as a porous film, a microporous film (microporous film), a nonwoven fabric, or a woven fabric, which is made of a thermoplastic resin such as polyolefin.
  • cyclic carbonates such as ethylene carbonate, propylene carbonate, vinylene carbonate, butylene carbonate, ethylene methyl carbonate (EMC), diethyl carbonate (DEC), dimethyl carbonate (DMC), dipropyl carbonate (DPC)
  • organic solvents such as aliphatic carboxylic acid esters, ⁇ -lactones such as ⁇ -butyrolactone, chain ethers, cyclic ethers, and the like. Mixtures of the above can be used.
  • lithium salts can be dissolved in these organic solvents.
  • the separator 40 is mainly composed of a resin porous film, woven fabric, non-woven fabric, etc., and as its resin component, for example, a polyolefin resin such as polypropylene or polyethylene, a polyester resin, an acrylic resin, a styrene resin, or a nylon resin is used. it can.
  • a polyolefin-based microporous membrane is preferable because of its excellent ion permeability and performance of physically separating the positive electrode and the negative electrode.
  • the separator 40 may be formed with a layer containing inorganic particles. Examples of the inorganic particles may include insulating oxides, nitrides, sulfides, carbides, etc. It is preferable to contain TiO 2 or Al 2 O 3 .
  • all of the positive electrode current collector terminal portions 24 formed on the positive electrode 20 are all of the negative electrode current collector terminal portions 34 formed on the negative electrode 30. Are fixed to each other by ultrasonic welding or the like.
  • the negative electrode current collector terminal portion 34 of the positive electrode 20 is conductively connected to the positive electrode lead tab 120, and the negative electrode terminal portion of the negative electrode 30 is conductively connected to the negative electrode lead tab 130.
  • the positive electrode extraction tab 120 is made of aluminum or an aluminum alloy
  • the negative electrode extraction tab 130 is made of nickel, copper, or copper alloy.
  • nickel plating may be applied to the surface.
  • the two portions on the opposite two sides of the electrode laminate 60 are fixed by the adhesive tape 65 or the like, It is preferable to ensure that the laminated state is maintained.
  • the electrode laminate 60 and the electrolyte solution (not shown) formed as shown in FIG. 2 are sealed in the laminate film exterior member 80 in a state where the positive electrode extraction tab 120 and the negative electrode extraction tab 130 are extracted, A battery 100 as shown in FIG.
  • the laminate film exterior member 80 is composed of two laminate films surrounding and sandwiching the electrode laminate 60 from both sides in the lamination direction, and the first sides of the opposing surfaces that overlap each other around the electrode laminate 60. 111, the second side 112, the third side 113, and the fourth side 114 are heat-welded to form a heat-welded portion (sealing region) 81, so that the electrode stack 60 is sealed together with an electrolyte (not shown). Has been.
  • the positive electrode pull-out tab 120 is pulled out from the first side 111
  • the negative electrode pull-out tab 130 is pulled out from the second side 112.
  • the electrode laminate 60 and the electrolyte solution are sealed with two laminate films.
  • the electrode laminate 60 and the electrolysis are folded so that one laminate film is folded. It is good also as a structure which seals a liquid (not shown).
  • the laminate film exterior material 80 As a laminate film constituting the laminate film exterior material 80, as long as it has flexibility and can seal the electrode laminate 60 and the electrolyte (not shown) so that the electrolyte does not leak,
  • the film generally used for this kind of film-clad battery can be used.
  • a metal thin film layer and a heat-weldable resin layer are laminated, and further, on the surface opposite to the heat-weldable resin layer of the metal thin film layer. Furthermore, the structure which laminated
  • the electrode laminate 60 and the electrolytic solution the electrode laminate 60 is surrounded by facing the heat-welding resin layer.
  • metal thin film layer for example, a foil of Al, Ti, Ti alloy, Fe, stainless steel, Mg alloy or the like having a thickness of 10 ⁇ m to 100 ⁇ m can be used.
  • the resin used for the heat-welding resin layer is not particularly limited as long as it can be heat-welded.
  • polypropylene, polyethylene, acid-modified products thereof, polyphenylene sulfide, polyester such as polyethylene terephthalate, polyamide, An ethylene-vinyl acetate copolymer can be used.
  • the thickness of the heat-welding resin layer is preferably 10 ⁇ m to 200 ⁇ m, more preferably 30 ⁇ m to 100 ⁇ m.
  • the inner surface of the laminate film exterior material 80 becomes the above-described heat-weldable resin layer of the laminate film exterior material 80.
  • the order of lamination is defined so that the outermost layer always becomes the negative electrode 30. Therefore, in the battery 100, the negative electrode 30 of the electrode laminate 60 and the inner surface (heat-weldable resin layer) of the laminate film exterior material 80 are in contact with each other.
  • the manufacturing process of the positive electrode 20 in the battery 100 configured as described above will be described with reference to FIG.
  • the manufacturing process of the positive electrode 20 will be described as an example.
  • the manufacturing process of the negative electrode 30 is the manufacturing of the positive electrode 20 except that the material is changed and the insulating member 28 is not formed. It is almost the same as the process.
  • the positive electrode 20 is manufactured in the order of (A) ⁇ (B) ⁇ (C).
  • the sheet base material 203 is a base material that is a precursor of the current collector of the positive electrode 20 (the positive electrode current collector main body portion 22 and the positive electrode current collector terminal portion 24), and the coating film 207 is formed from the coating device 200. It is a film having a predetermined thickness formed by the slurry 205 to be applied, and is a precursor of the positive electrode active material layer 26 in the positive electrode 20.
  • FIG. 4 only the manufacturing process of the front surface of the sheet base material 203 is shown, but a similar coating film 207 is formed on the back surface of the sheet base material 203 by the coating apparatus 200.
  • the slurry 205 is intermittently applied from the coating apparatus 200, and the coating portion where the coating film 207 is formed and the coating film 207 are formed on the sheet base material 203. It shows how the uncoated parts that are not formed are alternately formed.
  • the coating film 207 is formed by the slurry 205 on the sheet base material 203 having a predetermined film thickness.
  • the sheet base material 203 is set to advance in the direction of the arrow in the figure. Furthermore, the coating apparatus 200 has a die head 260 provided with a coating outlet 265 for coating the slurry 205.
  • the longitudinal direction of the coating outlet 265 is set to be perpendicular to the traveling direction of the sheet base material 203.
  • the process proceeds to a process shown in FIG. 4B through a predetermined drying process and the like.
  • the insulating member 28 is applied to the boundary portion between the coated portion of the coated film 207 and the uncoated portion on the sheet base material 203 by a device (not shown).
  • the insulating member 28 can be formed at the boundary portion by applying heat and welding to a tape-shaped resin member such as polypropylene.
  • FIG. 4C shows a process of obtaining the positive electrode 20 by cutting a range indicated by a dotted line from the sheet base material 203 using a cutting device (not shown).
  • the part referred to as the coating film 207 on the sheet base material 203 is hereinafter referred to as the positive electrode active material layer 26.
  • the sheet base material 203 is referred to as a current collector of the positive electrode 20 (a positive electrode current collector main body 22 and a positive electrode current collector terminal portion 24).
  • FIG. 5 is a view showing an X-X ′ cross section of FIG.
  • the positive electrode active material layer 26 of the positive electrode 20 is a central portion excluding the start and finish of the application of the positive electrode active material layer 26, and is substantially equal to the overall average film thickness and is substantially constant.
  • a first film thickness portion 26a that occupies most of the area of the positive electrode active material layer 26, and a second film thickness portion that is located at one end of the positive electrode active material 26 and is thinner than the first film thickness portion 26a. 26b is illustrated.
  • the second film thickness portion 26 b is applied when the slurry 205 to be the positive electrode active material layer 26 is applied onto the sheet base material 203 that is a precursor of the positive electrode current collector. This is the first part.
  • the sum of the thickness of the second film thickness portion 26b and the thickness of the insulating member 28 partially disposed on the second film thickness portion 26b is equal to or less than the flat thickness of the first film thickness portion 26a.
  • the thicknesses of the first film thickness portion 26a and the second film thickness portion 26b are set. Since the thickness is set in this way, even when a plurality of positive electrodes 20 are used when forming the electrode stack 60, the thickness of the electrode stack 60 due to the insulating member 28 may be uneven. Absent.
  • the second film thickness portion 26b having a thin layer thickness is formed from the uncoated portion. Further, it is necessary to form the coating film 207 in succession, assuming that the first film thickness portion 26a having a large layer thickness is formed. For this reason, it turns out that especially the film thickness control of the coating film 207 by the coating apparatus 200 in the starting end part at the time of forming the coating film 207 is very important.
  • the coating valve 240 is opened, and at the same time, the return valve 250 is closed, and the slurry 205 is supplied from the coating valve 240 to the die head 260.
  • the slurry 205 is applied from the coating outlet 265 of the die head 260 to the sheet base material 203.
  • the valve body 247 is raised and separated from the through hole 242, and in the return valve 250, the valve body 257 is lowered and the through hole 252. The operation that closes the screen is performed.
  • a pressure as indicated by an arrow is applied to the slurry 205, whereby the pressure at which the slurry 205 is applied to the sheet base material 203 from the coating outlet 265 of the die head 260 is higher than expected, and the coating is applied from the die head 260.
  • the amount of the slurry 205 to be dispensed would become unstable.
  • the coating amount of the slurry 205 applied on the sheet base material 203 cannot be controlled, the desired coating film 207 cannot be obtained and the performance of the lithium ion secondary battery may be adversely affected. There was also sex.
  • the control of the coating amount of the slurry 205 at the timing of starting the application of the slurry 205 on the sheet base material 203 and the control of the film thickness of the coating film 207 accompanying the control are uneasy.
  • the second film thickness portion 26b having a small layer thickness is formed, it is necessary to form the coating film 207 by more complicated control.
  • the valve body of the return valve is a valve that operates in a horizontal or rotational direction with respect to the valve seat. It features that what has a valve structure is adopted.
  • FIG. 6 is a view for explaining the operation of the coating valve 240 and the return valve 300 in the coating apparatus 200 used in the battery electrode manufacturing method according to the present invention.
  • the coating valve 240 of the coating apparatus 200 used in the present invention is a valve in which the valve body of the coating valve operates perpendicularly to the valve seat. That is, as the coating valve 240, the valve body 247 closes or opens the through hole 242 provided in the valve seat 243 to control the flow rate, and a ball valve or the like is used.
  • the return valve 300 is a valve in which the valve body of the return valve operates in a horizontal or rotational direction with respect to the valve seat, and includes a gate valve and a ball valve.
  • FIG. 6 schematically shows a gate valve.
  • the return valve 300 is a gate valve that is provided in the valve box 301 and controls the flow rate by partitioning the flow of the slurry 205 in the valve box 301 by the gate valve body 307. Is used. It is clear that such a gate valve not only does not easily generate a high pressure such as a water hammer effect in the control of the flow rate, but can also extremely reduce the fluctuation of the flow rate to the coating valve connected through the piping. It was.
  • the flow rate of the slurry 205 is controlled by inserting and removing the gate valve body 307 from a substantially vertical direction with respect to the flow of the slurry 205.
  • the pressure as shown by the arrow in FIG. 10 is not generated in the slurry 205, and the amount of the slurry 205 applied from the die head 260 onto the sheet base material 203 can be easily controlled.
  • FIG. 7 is a diagram illustrating an example of operation timings of the coating valve 240 and the return valve 300 of the coating apparatus 200.
  • the operation timing shown in FIG. 7 is for forming the coating film 207 (positive electrode active material layer 26) shown in FIGS. That is, the second film thickness portion 26b having a thin layer thickness is formed on the sheet base material 203 from the uncoated portion, and the first film thickness portion 26a having a thick layer thickness is formed continuously.
  • the operation timing when forming the coating film 207 is shown.
  • the opening degree 0 [%] means the opening degree of the valve at which the flow path is completely blocked.
  • the opening degree 100 [%] means the opening degree of the valve when the user assumes that the flow rate is 100 [%], and the opening degree 100 [%] as the performance of the valve itself. Not to say.
  • FIG. 7 will be described in time series.
  • the horizontal axis in FIG. 7 represents the time axis. 7 shows the opening degree of the coating valve 240, and the lower part shows the opening degree of the return valve 300.
  • the opening degree of the coating valve 240 is increased from 0% and the opening degree of the return valve 300 is set to 100. It is trying to decrease from%.
  • the opening degree increase in Nurikoben 240 temporarily stopped, the opening degree constant. Thereby, the coating film 207 corresponding to the second film thickness portion 26b is formed.
  • the opening degree of the return valve 300 which has reduced the degree of opening from 100% opening at t 0 is 0% at t 2.
  • Opening which has been a degree of opening fixed in Nurikoben 240 increases again at t 3, 100% opening at t 4, to form a coating film 207 corresponding to the first film thickness portion 26a To.
  • t 5 is slightly earlier than the timing of reducing the degree of opening of Nurikoben 240 from 100% to terminate the period for forming the coating film 207 corresponding to the first film thickness portion 26a, the return valve 300 Increase the opening from 0%.
  • the opening degree of Nurikoben 240 starts the reduction from 100% t 6. Timing the opening of Nurikoben 240 is 0% and, timing the opening of the return valve 300 is 100%, is controlled so as to coincide with t 7.
  • the coating film 207 that assumes the first film thickness portion 26a can be formed.
  • the coating valve 240 is a ball valve
  • the return valve 300 is a gate valve
  • the gate valve body is opened and closed when the gate valve is opened and closed. Since the movement does not affect the coating valve 240, according to the battery electrode manufacturing method and manufacturing apparatus according to the present invention, the operation of the coating valve 240 and the return valve 300 is performed. As a result, fluctuations in the pressure of the slurry 205 in the die head 260 can be suppressed, the amount of the slurry 205 applied from the die head 260 can be easily controlled, and a desired coating film can be obtained. This can contribute to improving the performance of the secondary battery.
  • the performance of the battery 100 can be improved.
  • FIG. 8 is a view for explaining the operation of the coating valve 240 and the return valve 300 in the coating apparatus 200 used in the method for manufacturing a battery electrode according to another embodiment of the present invention.
  • the coating apparatus 200 used in another embodiment is different from the coating apparatus 200 shown in FIG. 6 only in that a plurality of gate valve bodies 307 are provided in the return valve 300, and the other configurations are the same. It is.
  • the two gate valve bodies 307 are configured to partition the flow of the slurry 205 in the valve box 301.
  • the valve is formed by three or more gate valve bodies 307. The flow of the slurry 205 in the box 301 may be partitioned.
  • the plurality of gate valve bodies 307 are inserted / removed from a substantially vertical direction with respect to the flow of the slurry 205, so that the case of the previous embodiment. Therefore, more precise flow rate control is possible.
  • the present invention relates to a method and an apparatus for manufacturing an electrode for a battery such as a lithium ion secondary battery that can be reduced in size and weight and has a large energy density.
  • a manufacturing method and manufacturing apparatus for battery electrodes when applying a slurry containing active material particles onto a sheet substrate such as a current collector, it is difficult to control the amount of slurry applied, and the desired coating There was a problem that a film could not be obtained and the performance of the lithium ion secondary battery was adversely affected.
  • the battery electrode manufacturing method and manufacturing apparatus is a valve in which the valve body of the return valve operates in a horizontal or rotational direction with respect to the valve seat, and the valve body at the time of opening and closing the return valve Therefore, according to the battery electrode manufacturing method / manufacturing apparatus of the present invention, the inside of the die head accompanying the operation of the coating valve and the return valve is not affected by the movement of the coating valve.
  • the fluctuation of the slurry pressure can be suppressed, the amount of slurry applied from the die head can be easily controlled, the desired coating film can be obtained, and the performance of the lithium ion secondary battery can be improved. Can contribute.
  • SYMBOLS 20 Positive electrode 22 ... Positive electrode collector main-body part 24 ... Positive electrode collector terminal part 26 ... Positive electrode active material layer 26a ... 1st film thickness part 26b ... 2nd film thickness Portion 28 ... Insulating member 30 ... Negative electrode 32 . Negative electrode current collector body 34 ... Negative electrode current collector terminal 36 ... Negative electrode active material layer 40 ... Separator 60 ... Electrode Laminate 65 ... Adhesive tape 80 ... Laminate film exterior material 81 ... Thermal weld (sealing region) DESCRIPTION OF SYMBOLS 100 ... Battery 110 ... Battery main-body part 111 ... 1st edge 112 ... 2nd edge 113 ... 3rd edge 114 ...

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  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Coating Apparatus (AREA)

Abstract

In order to provide a battery electrode manufacturing method with which a discharge amount of a slurry discharged from a die head can be easily controlled and a desired coating film can be obtained, and which can contribute to the improved performance of a lithium-ion secondary battery, this battery electrode manufacturing method is a method for manufacturing a battery electrode by means of a coating device 200 having a tank 220 that stores a slurry, a head 260 that has a discharge outlet for discharging the slurry to a sheet substrate 203 conveyed by a roller 270, a coating valve 240 that opens and closes so as to control the amount of slurry flowing into the head 260, a return valve 250 that opens and closes so as to control the amount of slurry flowing into the tank 220, and a pipe 210 that supplies slurry that has been pressure-fed from the tank to both the coating valve 240 and the return valve 250, wherein the valve body of the return valve 250 is a valve that operates in a horizontal or rotational direction with respect to the valve seat, and said method has a step for adjusting the amount of slurry to be discharged by controlling the opening degree of the coating valve 240 and controlling the opening degree of the return valve 250.

Description

電池用電極の製造方法及び電池用電極の製造装置及び電池用電極及び電池Battery electrode manufacturing method, battery electrode manufacturing apparatus, battery electrode and battery
　本発明は、ラミネート型のリチウムイオン二次電池の電極を製造する際、活物質などのスラリーをシート基材に塗工することで製造される電池用電極の製造方法及び電池用電極の製造装置、前記方法で製造した電池用電極、及びこのような電池用電極によりなる電池に関する。 The present invention relates to a battery electrode manufacturing method and a battery electrode manufacturing apparatus manufactured by applying a slurry such as an active material to a sheet base material when manufacturing an electrode of a laminate-type lithium ion secondary battery. The present invention relates to a battery electrode manufactured by the above-described method and a battery including such a battery electrode.
　リチウムイオン二次電池は、小型化、軽量化が可能であって、エネルギー密度が大きいので、携帯機器の電源、電動自転車、電気自動車等の電源、あるいは商用電源のバックアップ用途で利用しており、性能向上のための様々な提案を見ることができる。 Lithium ion secondary batteries can be reduced in size and weight and have a high energy density, so they are used for portable device power supplies, electric bicycles, electric vehicles, and other commercial power backup applications. Various proposals for improving performance can be seen.
　リチウムイオン二次電池では、帯状の集電体の表面に活物質粒子を含有するスラリーを連続的または間欠的に塗布し、乾燥した後に圧縮することで、活物質粒子相互、および活物質粒子と集電体との電気的接触抵抗を小さくし、更にはエネルギー密度を高めて電池の性能の向上を行っている。 In a lithium ion secondary battery, a slurry containing active material particles is applied continuously or intermittently to the surface of a strip-shaped current collector, dried, and then compressed, so that the active material particles mutually and the active material particles The battery performance is improved by reducing the electrical contact resistance with the current collector and further increasing the energy density.
　リチウムイオン二次電池を例にとると、負極活物質層は、黒鉛をはじめとする炭素質粒子が主成分である場合には、正極活物質層は、リチウムマンガン複合酸化物粒子等のリチウム含有複合酸化物を利用している。 Taking a lithium ion secondary battery as an example, when the negative electrode active material layer is mainly composed of carbonaceous particles such as graphite, the positive electrode active material layer contains lithium such as lithium manganese composite oxide particles. A composite oxide is used.
　また、集電体などのシート基材に、活物質粒子を含有するスラリーを塗工する工程で用いられるダイコータなどの塗工装置については、例えば、特許文献１（特開２０１５－２６４７１号公報）に開示されている。 Also, for a coating apparatus such as a die coater used in a step of coating a slurry containing active material particles on a sheet substrate such as a current collector, for example, Patent Document 1 (Japanese Patent Laid-Open No. 2015-26471). Is disclosed.
　特開２０１５－２６４７１号公報 Japanese Unexamined Patent Publication No. 2015-26471
　ここで、シート基材に、活物質粒子を含むスラリーを塗工する塗工装置２００を用いて間欠塗工（シート基材２０３上に塗工膜２０７の形成区間（塗工部）と、非形成区間（未塗工部）とを交互に設ける塗工法）を行う構成の概略について説明する。図９は塗工装置２００を模式的に示す図である。また、図１０は塗工装置２００における塗工弁２４０及びリターン弁２５０の動作を説明する図である。 Here, intermittent application (formation section (coating part) of the coating film 207 on the sheet base material 203) and non-application using the coating apparatus 200 for applying the slurry containing the active material particles to the sheet base material. An outline of a configuration for performing a forming method (a coating method in which formation sections (uncoated portions) are alternately provided) will be described. FIG. 9 is a diagram schematically showing the coating apparatus 200. FIG. 10 is a diagram for explaining the operation of the coating valve 240 and the return valve 250 in the coating apparatus 200.
　間欠塗工における塗工装置２００のスラリー２０５の流路には、ダイヘッド２６０と、ダイヘッド２６０に連結された塗工弁２４０と、ポンプ２３０、スラリー２０５を溜めるタンク２２０を有している。また、当該タンク２２０と塗工弁２４０との間に位置するリターン弁２５０とを有している。 The flow path of the slurry 205 of the coating apparatus 200 in intermittent coating has a die head 260, a coating valve 240 connected to the die head 260, a pump 230, and a tank 220 for storing the slurry 205. Moreover, it has the return valve 250 located between the said tank 220 and the coating valve 240. FIG.
　塗工装置２００において、タンク２２０はスラリー２０５の貯蔵部であると共に、ダイヘッド２６０にスラリー２０５を供給する供給部でもある。このようなタンク２２０は、不図示のメインタンクなどからスラリー２０５の供給を受けることができるようにしておくことが好ましい。 In the coating apparatus 200, the tank 220 is a storage unit for the slurry 205 and a supply unit for supplying the slurry 205 to the die head 260. Such a tank 220 is preferably configured to receive the supply of the slurry 205 from a main tank (not shown) or the like.
　タンク２２０は、配管２１０によりダイヘッド２６０と接続されている。また、配管２１０には、送液手段であるポンプ２３０が設けられている。このポンプ２３０が動作することで、スラリー２０５がタンク２２０からダイヘッド２６０側（図中矢印方向）へと送り込まれるようになっている。 The tank 220 is connected to the die head 260 by a pipe 210. The pipe 210 is provided with a pump 230 which is a liquid feeding means. By operating the pump 230, the slurry 205 is sent from the tank 220 to the die head 260 side (in the direction of the arrow in the figure).
　塗工装置２００における配管２１０は分岐しており、分岐した一方側の配管２１０はダイヘッド２６０へと接続され、分岐した他方側の配管２１０はタンク２２０へと接続されるようになっている。 The piping 210 in the coating apparatus 200 is branched, the branched piping 210 on one side is connected to the die head 260, and the branched piping 210 on the other side is connected to the tank 220.
　分岐した一方側の配管２１０の途中には塗工弁２４０が設けられている。また、分岐した他方側の配管２１０の途中にはリターン弁２５０が設けられている。リターン弁２５０は開状態であるときタンク２２０側にスラリー２０５を戻すことができるようになっている。また、塗工弁２４０は開状態であるとき、ダイヘッド２６０にスラリー２０５を供給する。 A coating valve 240 is provided in the middle of the branched pipe 210 on one side. A return valve 250 is provided in the middle of the branched pipe 210 on the other side. When the return valve 250 is open, the slurry 205 can be returned to the tank 220 side. Further, when the coating valve 240 is in the open state, the slurry 205 is supplied to the die head 260.
　ダイヘッド２６０としては、例えば、スロットダイと呼ばれるものが用いられる。このダイヘッド２６０には、配管２１０からスラリー２０５が供給される流入口２６１が設けられている。また、ダイヘッド２６０にはマニホールド２６３と呼ばれる液溜り部が設けられている。流入口２６１から供給されたスラリー２０５は、このマニホールド２６３を介して塗出口２６５から吐出される。塗出口２６５は一定幅のスリット状をなしている。 As the die head 260, for example, a so-called slot die is used. The die head 260 is provided with an inlet 261 through which the slurry 205 is supplied from the pipe 210. The die head 260 is provided with a liquid reservoir called a manifold 263. The slurry 205 supplied from the inlet 261 is discharged from the coating outlet 265 through the manifold 263. The coating outlet 265 has a slit shape with a constant width.
　シート基材２０３は、所定のテンションがかかった状態でバックロール２７０に張架されている。また、本発明に係る塗工装置２００は回転するローラなどの搬送手段（不図示）を有しており、シート基材２０３は図中矢印方向に当該搬送手段によって搬送されるようになっている。シート基材２０３の搬送に伴い、バックロール２７０は回転するようになっている。 The sheet base material 203 is stretched around the back roll 270 in a state where a predetermined tension is applied. Further, the coating apparatus 200 according to the present invention has a conveying means (not shown) such as a rotating roller, and the sheet base material 203 is conveyed by the conveying means in the direction of the arrow in the figure. . As the sheet base material 203 is conveyed, the back roll 270 rotates.
　塗工弁２４０が開状態となることで、塗出口２６５からスラリー２０５が塗出され、シート基材２０３上に塗工膜２０７が形成される。この塗工膜２０７が形成された部分を塗工部と称する。一方、塗工弁２４０が閉状態である場合には、スラリー２０５は塗出されず、シート基材２０３上に未塗工部が形成される。このような塗工装置２００によれば、シート基材２０３上に塗工部と未塗工部とを交互に形成することができるようになっている。また、このような塗工装置２００による塗工方法を間欠塗工と称している。 When the coating valve 240 is in the open state, the slurry 205 is coated from the coating outlet 265, and the coating film 207 is formed on the sheet base material 203. A portion where the coating film 207 is formed is referred to as a coating portion. On the other hand, when the coating valve 240 is in the closed state, the slurry 205 is not applied, and an uncoated portion is formed on the sheet base material 203. According to such a coating apparatus 200, the coated part and the uncoated part can be alternately formed on the sheet base material 203. Such a coating method using the coating apparatus 200 is referred to as intermittent coating.
　塗工弁２４０は、スラリー２０５の塗工中でも弁の開閉を精度良く変化させることができ、リターン弁２５０の動作と組み合わせてスラリーの流路を制御することで、複雑な塗工状態を実現することが可能となる。 The coating valve 240 can accurately change the opening and closing of the valve even during the application of the slurry 205, and realizes a complicated coating state by controlling the flow path of the slurry in combination with the operation of the return valve 250. It becomes possible.
　次に、塗工弁２４０とリターン弁２５０の内部構造及び動作を、図１０を参照して説明する。ここで、塗工弁２４０とリターン弁２５０とは共通の構造を有しているが、動作については独立している。 Next, the internal structure and operation of the coating valve 240 and the return valve 250 will be described with reference to FIG. Here, the coating valve 240 and the return valve 250 have a common structure, but their operations are independent.
　塗工弁２４０及びリターン弁２５０は、弁箱２４１、２５１の内部の中央部に貫通穴２４２、２５２を有する弁座２４３、２５３が設けられており、この弁座２４３、２５３に接離可能な弁体２４７、２５７が配置されている。 The coating valve 240 and the return valve 250 are provided with valve seats 243 and 253 having through holes 242 and 252 at the center inside the valve boxes 241 and 251, and can be contacted and separated from the valve seats 243 and 253. Valve bodies 247 and 257 are arranged.
　弁体２４７、２５７にはシャフト２４６、２５６が一体的に形成されており、シャフト２４６、２５６にシリンダー２４５、２５５が接続されている。シリンダー２４５、２５５が作動すると、シャフト２４６、２５６を介して弁体２４７、２５７が、弁座２４３、２５３に近づいたり離れたりする方向（図中の上下方向）に移動させられる。 Shafts 246 and 256 are integrally formed on the valve bodies 247 and 257, and cylinders 245 and 255 are connected to the shafts 246 and 256, respectively. When the cylinders 245 and 255 are actuated, the valve bodies 247 and 257 are moved through the shafts 246 and 256 in a direction approaching or leaving the valve seats 243 and 253 (vertical direction in the drawing).
　弁体２４７、２５７が当接している状態では、貫通穴２４２、２５２が弁体２４７、２５７によって塞がれて、塗工弁２４０及びリターン弁２５０は閉じた状態である。 In a state where the valve bodies 247 and 257 are in contact, the through holes 242 and 252 are closed by the valve bodies 247 and 257, and the coating valve 240 and the return valve 250 are closed.
　一方、弁体２４７、２５７が弁座１３２から離れていると、貫通穴２４２、２５２が開放されて、塗工弁２４０及びリターン弁２５０は開いた状態である。そして、弁体２４７、２５７が弁座２４３、２５３から離れている距離に応じて塗工弁２４０及びリターン弁２５０の開度（開口量）が変わり、塗工弁２４０及びリターン弁２５０を通過するスラリーの量が変動する。 On the other hand, when the valve bodies 247 and 257 are separated from the valve seat 132, the through holes 242 and 252 are opened, and the coating valve 240 and the return valve 250 are opened. The opening degree (opening amount) of the coating valve 240 and the return valve 250 changes according to the distance between the valve bodies 247 and 257 from the valve seats 243 and 253, and passes through the coating valve 240 and the return valve 250. The amount of slurry varies.
　間欠塗工においては、塗工膜２０７の形成を開始するタイミングで、塗工弁２４０を開け、それと同時にリターン弁２５０を閉めて、塗工弁２４０からダイヘッド２６０にスラリー２０５を供給して、ダイヘッド２６０の塗出口２６５からシート基材２０３に対してスラリー２０５を塗出するようにしている。 In the intermittent coating, the coating valve 240 is opened at the timing when the formation of the coating film 207 is started, and at the same time, the return valve 250 is closed, and the slurry 205 is supplied from the coating valve 240 to the die head 260, The slurry 205 is applied to the sheet base material 203 from the application outlet 265 of 260.
　より詳細には、図１０に示すように、塗工弁２４０においては、弁体２４７を上昇させて貫通穴２４２から離間させると共に、リターン弁２５０においては、弁体２５７は下降させて貫通穴２５２を塞ぐような動作を行うこととなる。 More specifically, as shown in FIG. 10, in the coating valve 240, the valve body 247 is raised and separated from the through hole 242, and in the return valve 250, the valve body 257 is lowered and the through hole 252. The operation that closes the screen is performed.
　このとき、スラリー２０５中に矢印に示すような圧力が掛かり、これにより、ダイヘッド２６０の塗出口２６５からシート基材２０３に対してスラリー２０５を塗出する圧力が想定よりも高まり、ダイヘッド２６０から塗出するスラリー２０５の塗出量の制御が困難になる、という問題があった。 At this time, a pressure as indicated by an arrow is applied to the slurry 205, whereby the pressure at which the slurry 205 is applied to the sheet base material 203 from the coating outlet 265 of the die head 260 is higher than expected, and the coating is applied from the die head 260. There has been a problem that it becomes difficult to control the coating amount of the slurry 205 to be dispensed.
　さらに、シート基材２０３上に塗布するスラリー２０５の塗出量の制御ができないと、所望の塗工膜２０７を得ることができず、リチウムイオン二次電池の性能にも悪影響を与えてしまう、という問題もあった。 Furthermore, if the application amount of the slurry 205 applied on the sheet base material 203 cannot be controlled, the desired coating film 207 cannot be obtained, and the performance of the lithium ion secondary battery will be adversely affected. There was also a problem.
　本発明は、上記のような問題を解決するものであって、本発明に係る電池用電極の製造方法は、スラリーを貯溜するタンクと、ローラによって搬送されるシート基材に対して、スラリーを吐出する塗出口を有するヘッドと、開閉することによって前記ヘッドへのスラリーの流入量を制御する塗工弁と、開閉することによって前記タンクへのスラリーの流入量を制御するリターン弁と、前記タンクから圧送されるスラリーを前記塗工弁及び前記リターン弁の双方に供給する配管と、を有する塗工装置によって電池用電極を製造する方法であって、前記リターン弁の弁体が弁座に対して水平または回転方向に作動する弁であり、前記塗工弁の開度の制御、及び、前記リターン弁の開度の制御を行うことで吐出するスラリーの量を調整するステップを有する。 The present invention solves the above problems, and the battery electrode manufacturing method according to the present invention includes a tank for storing slurry and a sheet substrate conveyed by a roller. A head having a discharge outlet for discharging; a coating valve for controlling the amount of slurry flowing into the head by opening and closing; a return valve for controlling the amount of slurry flowing into the tank by opening and closing; and the tank A pipe for supplying slurry fed by pressure to both the coating valve and the return valve, and a battery electrode manufactured by a coating apparatus, wherein the valve body of the return valve is against the valve seat These valves operate in the horizontal or rotational direction, and are steps for adjusting the amount of slurry to be discharged by controlling the opening of the coating valve and controlling the opening of the return valve. Having.
　また、本発明に係る電池用電極の製造方法は、前記塗工弁の弁体が弁座に対して垂直に作動する弁である。 Also, the battery electrode manufacturing method according to the present invention is a valve in which the valve body of the coating valve operates perpendicularly to the valve seat.
　また、本発明に係る電池用電極の製造方法は、前記塗工弁の開度を０％から増加させる時、前記リターン弁の開度を１００％から減少させる。 Further, in the battery electrode manufacturing method according to the present invention, when the coating valve opening is increased from 0%, the return valve opening is decreased from 100%.
　また、本発明に係る電池用電極の製造方法は、前記塗工弁の開度を０％から１００％に増加させる途中に開度を一定に保つ期間を設けた。 In addition, the battery electrode manufacturing method according to the present invention provided a period during which the opening degree of the coating valve was kept constant while the opening degree of the coating valve was increased from 0% to 100%.
　また、本発明に係る電池用電極の製造方法は、前記塗工弁の開度が０％となる時、前記リターン弁の開度が１００％となるように、前記塗工弁の開度を減少させ、前記リターン弁の開度を増加させる。 The battery electrode manufacturing method according to the present invention may be configured such that when the coating valve opening degree is 0%, the opening degree of the coating valve is set so that the opening degree of the return valve is 100%. Decrease and increase the opening of the return valve.
　また、本発明に係る電池用電極の製造装置は、スラリーを貯溜するタンクと、ローラによって搬送されるシート基材に対して、スラリーを吐出する塗出口を有するヘッドと、開閉することによって前記ヘッドへのスラリーの流入量を制御する塗工弁と、開閉することによって前記タンクへのスラリーの流入量を制御するリターン弁と、前記タンクから圧送されるスラリーを前記塗工弁及び前記リターン弁の双方に供給する配管と、を有する電池用電極を製造する装置であって、前記塗工弁の弁体が弁座に対して垂直に作動する弁であり、前記リターン弁の弁体が弁座に対して水平または回転方向に作動する弁である。 The battery electrode manufacturing apparatus according to the present invention includes a tank for storing slurry, a head having a coating outlet for discharging slurry to a sheet substrate conveyed by a roller, and the head by opening and closing. A coating valve that controls the amount of slurry flowing into the tank, a return valve that controls the amount of slurry flowing into the tank by opening and closing, and a slurry fed by pressure from the tank to the coating valve and the return valve. An apparatus for manufacturing a battery electrode, wherein the valve body of the coating valve is a valve that operates perpendicularly to a valve seat, and the valve body of the return valve is a valve seat Is a valve that operates in a horizontal or rotational direction.
　また、本発明に係る電池用電極の製造装置は、前記塗工弁の開度を０％から増加させる時、前記リターン弁の開度を１００％から減少させる。 Also, the battery electrode manufacturing apparatus according to the present invention reduces the opening degree of the return valve from 100% when the opening degree of the coating valve is increased from 0%.
　また、本発明に係る電池用電極の製造装置は、前記塗工弁の開度を０％から１００％に増加させる途中に開度を一定に保つ期間を設けた。 In addition, the battery electrode manufacturing apparatus according to the present invention provided a period during which the opening degree of the coating valve was kept constant while the opening degree of the coating valve was increased from 0% to 100%.
　また、本発明に係る電池用電極の製造装置は、前記塗工弁の開度が０％となる時、前記リターン弁の開度が１００％となるように、前記塗工弁の開度を減少させ、前記リターン弁の開度を増加させる。 Further, the battery electrode manufacturing apparatus according to the present invention is configured so that the opening degree of the coating valve is set so that the opening degree of the return valve becomes 100% when the opening degree of the coating valve becomes 0%. Decrease and increase the opening of the return valve.
　また、本発明に係る電池用電極は、前記のいずれかに記載の電池用電極の製造方法を用いて、シート基材上に、間欠的に設けられたスラリーにより活物質層を形成した。 In addition, the battery electrode according to the present invention was formed by using the slurry for intermittently provided on the sheet base material by using the battery electrode manufacturing method described above.
　また、本発明に係る電池用電極は、活物質層が、厚みが略一定の第１膜厚部と、第１膜厚部よりも厚さが薄い第２膜厚部と、からなり、活物質層が設けられている部分と、活物質層が設けられていない部分の境界に第２膜厚部が配された。 In the battery electrode according to the present invention, the active material layer includes a first film thickness portion having a substantially constant thickness and a second film thickness portion having a thickness smaller than the first film thickness portion. The second film thickness portion was disposed at the boundary between the portion where the material layer was provided and the portion where the active material layer was not provided.
　また、本発明に係る電池用電極は、活物質層が設けられている部分と、活物質層が設けられていない部分の境界に絶縁部材が配された。 Also, in the battery electrode according to the present invention, an insulating member was arranged at the boundary between the portion where the active material layer was provided and the portion where the active material layer was not provided.
　また、本発明に係る電池は、前記のいずれかに記載の電池用電極を正極又は負極のいずれかとして用い、前記正極と前記負極とをセパレーターを介して積層した電極積層体と、電解液とが外装材の内部に収容されると共に、前記正極と導電接続された正極引き出しタブと、前記負極と導電接続された負極引き出しタブとが前記外装材の外部に引き出される。 In addition, the battery according to the present invention uses any one of the battery electrodes described above as either a positive electrode or a negative electrode, an electrode laminate in which the positive electrode and the negative electrode are stacked via a separator, an electrolyte solution, Is housed inside the exterior material, and a positive electrode lead tab conductively connected to the positive electrode and a negative electrode lead tab conductively connected to the negative electrode are drawn out of the exterior material.
　本発明に係る電池用電極の製造方法・製造装置は、前記リターン弁の弁体が弁座に対して水平または回転方向に作動する弁であり、前記リターン弁の開閉時における弁体の移動が、前記塗工弁に影響を与えることがないので、このような本発明に係る電池用電極の製造方法・製造装置によれば、前記塗工弁、前記リターン弁の動作に伴うダイヘッド内におけるスラリーの圧力の変動を抑制することができ、ダイヘッドから塗出するスラリーの塗出量の制御が容易となり、所望とする塗工膜を得ることができ、リチウムイオン二次電池の性能向上に資することができる。 The battery electrode manufacturing method / manufacturing apparatus according to the present invention is a valve in which the valve body of the return valve operates in a horizontal or rotational direction with respect to a valve seat, and the movement of the valve body when the return valve is opened and closed Therefore, according to the battery electrode manufacturing method / manufacturing apparatus of the present invention, the slurry in the die head accompanying the operation of the coating valve and the return valve is not affected. Pressure fluctuations can be suppressed, the amount of slurry applied from the die head can be easily controlled, the desired coating film can be obtained, and the performance of the lithium ion secondary battery can be improved. Can do.
　また、前記のような製造方法を用いて製造された、本発明に係る電池用電極によれば、電池の性能を向上させることができる。 Moreover, according to the battery electrode according to the present invention manufactured using the manufacturing method as described above, the performance of the battery can be improved.
　また、前記のような電池用電極が用いられた、本発明に係る電池によれば、より性能を向上させた電池を提供することが可能となる。 Moreover, according to the battery according to the present invention using the battery electrode as described above, it is possible to provide a battery with improved performance.
電極積層体６０における各構成の積層順序を説明する図である。FIG. 6 is a diagram illustrating a stacking order of components in an electrode stack 60. ラミネートフィルム外装材８０内に封止される電極積層体６０の構成を示す図である。It is a figure which shows the structure of the electrode laminated body 60 sealed in the laminate film exterior material 80. FIG. ラミネートフィルム外装材８０で外装された電池１００の斜視図である。FIG. 3 is a perspective view of a battery 100 that is packaged with a laminate film packaging material 80. 電池１００における正極２０の製造過程を説明する図である。FIG. 4 is a diagram illustrating a manufacturing process of positive electrode 20 in battery 100. 図４（Ｃ）のＸ－Ｘ’断面を示す図である。FIG. 5 is a view showing an X-X ′ cross section in FIG. 本発明に係る電池用電極の製造方法で用いられる塗工装置２００における塗工弁２４０及びリターン弁３００の動作を説明する図である。It is a figure explaining operation | movement of the coating valve 240 and the return valve 300 in the coating apparatus 200 used with the manufacturing method of the battery electrode which concerns on this invention. 塗工装置２００の塗工弁２４０及びリターン弁３００の動作タイミングの一例を示す図である。It is a figure which shows an example of the operation timing of the coating valve 240 of the coating apparatus 200, and the return valve 300. FIG. 本発明の他の実施形態に係る電池用電極の製造方法で用いられる塗工装置２００における塗工弁２４０及びリターン弁３００の動作を説明する図である。It is a figure explaining operation | movement of the coating valve 240 and the return valve 300 in the coating apparatus 200 used with the manufacturing method of the battery electrode which concerns on other embodiment of this invention. 塗工装置２００を模式的に示す図である。It is a figure which shows the coating apparatus 200 typically. 塗工装置２００における塗工弁２４０及びリターン弁２５０の動作を説明する図である。It is a figure explaining operation | movement of the coating valve 240 and the return valve 250 in the coating apparatus 200. FIG.
　以下、本発明の実施の形態を図面を参照しつつ説明する。なお、本発明の実施の形態は、以下に記載する実施の形態に限定されるものではなく、当業者の知識に基づいて設計の変更などの変形を加えることも可能であり、そのような変形が加えられた実施の形態も本発明の実施の形態の範囲に含まれ得るものである。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. The embodiments of the present invention are not limited to the embodiments described below, and modifications such as design changes can be added based on the knowledge of those skilled in the art. Embodiments to which is added can also be included in the scope of the embodiments of the present invention.
　まず、本発明の製造方法・製造装置によって製造される電池用電極で構成される電池１００について説明する。 First, the battery 100 composed of battery electrodes manufactured by the manufacturing method and manufacturing apparatus of the present invention will be described.
　図１は、本発明の製造方法・製造装置によって製造される正極２０、負極３０（電池用電極）と、セパレーター４０とを積層することで得られる電極積層体６０における各構成の積層順序を説明する図である。 FIG. 1 illustrates the stacking order of components in an electrode stack 60 obtained by stacking a positive electrode 20, a negative electrode 30 (battery electrode) and a separator 40 manufactured by the manufacturing method and manufacturing apparatus of the present invention. It is a figure to do.
　図２はラミネートフィルム外装材８０内に封止される電極積層体６０の構成を示す図である。また、図３はラミネートフィルム外装材８０で外装された電池１００の斜視図である。 FIG. 2 is a diagram showing the configuration of the electrode laminate 60 sealed in the laminate film exterior material 80. As shown in FIG. FIG. 3 is a perspective view of the battery 100 covered with a laminate film covering material 80.
　本実施形態においては、電池１００として、リチウムイオンが負極３０と正極２０とを移動することにより充放電が行われる、電気化学素子の１種であるリチウムイオン二次電池を例に説明するが、本発明は他の種類の電池にも適用することができる。 In the present embodiment, as the battery 100, a lithium ion secondary battery, which is a kind of electrochemical element in which charging and discharging are performed by moving lithium ions between the negative electrode 30 and the positive electrode 20, will be described as an example. The present invention can also be applied to other types of batteries.
　本発明の実施形態に係る電池１００は、複数の正極２０と複数の負極３０とがセパレーター４０を介して積層された電極積層体６０、および電解液（不図示）が、矩形のラミネートフィルム外装材８０内に収容された構造となっている。 A battery 100 according to an embodiment of the present invention includes an electrode laminate 60 in which a plurality of positive electrodes 20 and a plurality of negative electrodes 30 are laminated via a separator 40, and an electrolyte solution (not shown) having a rectangular laminate film exterior material. The structure is accommodated in 80.
　図１は電極積層体６０における各構成の積層順序を説明する図である。図１に示すように、電極積層体６０を構成する上では、正極２０、負極３０、セパレーター４０が用いられている。 FIG. 1 is a diagram for explaining the stacking order of the components in the electrode stack 60. As shown in FIG. 1, the positive electrode 20, the negative electrode 30, and the separator 40 are used in configuring the electrode laminate 60.
　正極２０は、矩形状の正極集電体本体部２２と、正極集電体本体部２２から延出する短冊状の正極集電体端子部２４とを有している。正極２０の集電体全体は、薄板状のアルミニウム板などからなり、正極集電体本体部２２においては、リチウムニッケル複合酸化物等を含む正極活物質層２６が両面に塗布されている。正極集電体端子部２４は、正極活物質層２６が塗布されていない未塗工部である。 The positive electrode 20 has a rectangular positive electrode current collector body portion 22 and a strip-like positive electrode current collector terminal portion 24 extending from the positive electrode current collector body portion 22. The entire current collector of the positive electrode 20 is made of a thin aluminum plate or the like, and the positive electrode current collector main body 22 is coated with a positive electrode active material layer 26 containing a lithium nickel composite oxide or the like on both sides. The positive electrode current collector terminal portion 24 is an uncoated portion where the positive electrode active material layer 26 is not applied.
　また、負極３０は、矩形状の負極集電体本体部３２と、負極集電体本体部３２から延出する短冊状の負極集電体端子部３４とを有している。負極３０の集電体全体は、薄板状のニッケル板又は銅板などからなり、負極集電体本体部３２においては、グラファイト等を含む負極活物質層３６が両面に塗布されている。負極集電体端子部３４は、負極活物質３６が塗布されていない未塗工部である。 The negative electrode 30 has a rectangular negative electrode current collector body 32 and a strip-shaped negative electrode current collector terminal 34 extending from the negative electrode current collector main body 32. The entire current collector of the negative electrode 30 is made of a thin plate-like nickel plate or copper plate, and the negative electrode current collector main body 32 is coated with a negative electrode active material layer 36 containing graphite or the like on both sides. The negative electrode current collector terminal portion 34 is an uncoated portion where the negative electrode active material 36 is not applied.
　正極活物質層２６を構成し得る材料を、より詳しくすると、例えば、ＬｉＣｏＯ２、ＬｉＮｉＯ２、ＬｉＮｉ（１－ｘ）ＣｏＯ２、ＬｉＮｉｘ（ＣｏＡｌ）（１－ｘ）Ｏ２、Ｌｉ２ＭｎＯ３－ＬｉＭＯ２（ここで、Ｍは遷移金属であり、例としてＮｉ、Ｃｏ、Ｆｅ、Ｃｒなどが挙げられる）、ＬｉＮｉ１／３Ｃｏ１／３Ｍｎ１／３Ｏ２などの層状酸化物系材料や、ＬｉＭｎ２Ｏ４、ＬｉＭｎ１．５Ｎｉ０．５Ｏ４、ＬｉＭｎ（２－ｘ）ＭｘＯ４などのスピネル系材料、ＬｉＭＰＯ４などのオリビン系材料、Ｌｉ２ＭＰＯ４Ｆ、Ｌｉ２ＭＳｉＯ４Ｆなどのフッ化オリビン系材料、Ｖ２Ｏ５などの酸化バナジウム系材料などが挙げられ、これらのうちの１種、または２種以上の混合物を使用することができる。 More specifically, materials that can form the positive electrode active material layer 26 are, for example, LiCoO 2 , LiNiO 2 , LiNi (1-x) CoO 2 , LiNi x (CoAl) (1-x) O 2 , Li 2 MnO 3. -LiMO 2 (where M is a transition metal, and examples thereof include Ni, Co, Fe, Cr, etc.), layered oxide materials such as LiNi 1/3 Co 1/3 Mn 1/3 O 2 And spinel materials such as LiMn 2 O 4 , LiMn 1.5 Ni 0.5 O 4 , LiMn (2-x) M x O 4 , olivine materials such as LiMPO 4 , Li 2 MPO 4 F, Li 2 MSiO 4 fluorinated olivine-based material, such as F, such as vanadium oxide-based materials such as V 2 O 5 and the like, can be used singly or a mixture of two or more of these .
　負極活物質層３６を構成し得る材料を、より詳しくすると、例えば、黒鉛、非晶質炭素、ダイヤモンド状炭素、フラーレン、カーボンナノチューブ、カーボンナノホーンなどの炭素材料や、リチウム金属材料、シリコンやスズなどの合金系材料、Ｎｂ２Ｏ５やＴｉＯ２などの酸化物系材料、あるいはこれらの複合物を用いることができる。 More specifically, materials that can form the negative electrode active material layer 36 include carbon materials such as graphite, amorphous carbon, diamond-like carbon, fullerene, carbon nanotube, and carbon nanohorn, lithium metal materials, silicon, tin, and the like. Alloy-based materials, oxide-based materials such as Nb 2 O 5 and TiO 2 , or composites thereof can be used.
　正極活物質層２６及び負極活物質層３６を構成し得る材料は、結着剤や導電助剤等を適宜加えた合剤であってよい。導電助剤としては、カーボンブラック、炭素繊維、または黒鉛などのうちの１種、または２種以上の組み合わせを用いることができる。また、結着剤としては、ポリフッ化ビニリデン（ＰＶＤＦ）、スチレンブタジエンゴム、ポリテトラフルオロエチレン、カルボキシメチルセルロース、変性アクリロニトリルゴム粒子などを用いることができる。 The material that can constitute the positive electrode active material layer 26 and the negative electrode active material layer 36 may be a mixture to which a binder, a conductive additive, and the like are appropriately added. As a conductive support agent, 1 type in carbon black, carbon fiber, or graphite, or a combination of 2 or more types can be used. As the binder, polyvinylidene fluoride (PVDF), styrene butadiene rubber, polytetrafluoroethylene, carboxymethyl cellulose, modified acrylonitrile rubber particles, and the like can be used.
　正極２０の集電体の材料としては、アルミニウム、ステンレス鋼、ニッケル、チタン、またはこれらの合金等を用いることができ、特にアルミニウムが好ましい。また、負極３０の集電体の材料としては、銅、ステンレス鋼、ニッケル、チタン、またはこれらの合金を用いることができる。 As the material of the current collector of the positive electrode 20, aluminum, stainless steel, nickel, titanium, or an alloy thereof can be used, and aluminum is particularly preferable. Further, as a material for the current collector of the negative electrode 30, copper, stainless steel, nickel, titanium, or an alloy thereof can be used.
　正極２０においては、正極集電体端子部２４側の端部と、正極集電体端子部２４の一部に絶縁部材２８が配されている。すなわち、正極活物質層２６が塗布されている正極集電体本体部２２と、正極活物質層２６が塗布されていない正極集電体端子部２４との間の境界部が絶縁部材２８によって覆われるような構成となっている。 In the positive electrode 20, an insulating member 28 is disposed at the end on the positive electrode current collector terminal portion 24 side and a part of the positive electrode current collector terminal portion 24. In other words, the insulating member 28 covers the boundary between the positive electrode current collector body portion 22 to which the positive electrode active material layer 26 is applied and the positive electrode current collector terminal portion 24 to which the positive electrode active material layer 26 is not applied. It is the structure that is called.
　正極２０は、セパレーター４０を介して負極３０と積層され、電極積層体６０とされる。電極積層体６０における積層状態が規定の積層状態からずれて、正極２０と負極３０の活物質層同士が接触し、正極２０と負極３０が短絡してしまうことを防止するために、絶縁部材２８が設けられている。 The positive electrode 20 is laminated with the negative electrode 30 through the separator 40 to form an electrode laminate 60. In order to prevent the laminated state in the electrode laminate 60 from deviating from the prescribed laminated state, the active material layers of the positive electrode 20 and the negative electrode 30 are in contact with each other, and the positive electrode 20 and the negative electrode 30 are short-circuited. Is provided.
　上記のような絶縁部材２８には、ポリイミド、ガラス繊維、ポリエステル、ポリプロピレン、或いはこれらを含む材料を用いることができる。正極活物質層２６が塗布されている部分と、塗布されていない部分との境界に、前記のような材料からなるテープ状の樹脂部材に熱を加えて、溶着させたり、ゲル状の樹脂を当該境界に塗布してから乾燥させたりすることで、絶縁部材２８を形成することができる。 For the insulating member 28 as described above, polyimide, glass fiber, polyester, polypropylene, or a material containing these can be used. Heat is applied to the tape-shaped resin member made of the above-described material at the boundary between the portion where the positive electrode active material layer 26 is applied and the portion where the positive electrode active material layer 26 is not applied. The insulating member 28 can be formed by applying to the boundary and then drying.
　セパレーター４０は、ポリオレフィン等の熱可塑性樹脂から作られた、多孔膜、マイクロポーラスフィルム（微多孔フィルム）、不織布あるいは織布など、電解液を含浸することができる矩形のシート状の部材である。 The separator 40 is a rectangular sheet-like member that can be impregnated with an electrolytic solution, such as a porous film, a microporous film (microporous film), a nonwoven fabric, or a woven fabric, which is made of a thermoplastic resin such as polyolefin.
　ここで、電解液としては、エチレンカーボネート、プロピレンカーボネート、ビニレンカーボネート、ブチレンカーボネート等の環状カーボネート類や、エチレンメチルカーボネート（ＥＭＣ）、ジエチルカーボネート（ＤＥＣ）、ジメチルカーボネート（ＤＭＣ）、ジプロピルカーボネート（ＤＰＣ）等の鎖状カーボネート類や、脂肪族カルボン酸エステル類や、γ－ブチロラクトン等のγ－ラクトン類や、鎖状エーテル類、環状エーテル類、などの有機溶媒のうちの１種、または２種以上の混合物を使用することができる。さらに、これらの有機溶媒にリチウム塩を溶解させることができる。 Here, as the electrolytic solution, cyclic carbonates such as ethylene carbonate, propylene carbonate, vinylene carbonate, butylene carbonate, ethylene methyl carbonate (EMC), diethyl carbonate (DEC), dimethyl carbonate (DMC), dipropyl carbonate (DPC) ) And other organic solvents such as aliphatic carboxylic acid esters, γ-lactones such as γ-butyrolactone, chain ethers, cyclic ethers, and the like. Mixtures of the above can be used. Furthermore, lithium salts can be dissolved in these organic solvents.
　セパレーター４０は主に樹脂製の多孔膜、織布、不織布等からなり、その樹脂成分として、例えばポリプロピレンやポリエチレン等のポリオレフィン樹脂、ポリエステル樹脂、アクリル樹脂、スチレン樹脂、またはナイロン樹脂等を用いることができる。特にポリオレフィン系の微多孔膜は、イオン透過性と、正極と負極とを物理的に隔離する性能に優れているため好ましい。また、必要に応じて、セパレーター４０には無機物粒子を含む層を形成してもよく、無機物粒子としては、絶縁性の酸化物、窒化物、硫化物、炭化物などを挙げることができ、なかでもＴｉＯ２やＡｌ２Ｏ３を含むことが好ましい。 The separator 40 is mainly composed of a resin porous film, woven fabric, non-woven fabric, etc., and as its resin component, for example, a polyolefin resin such as polypropylene or polyethylene, a polyester resin, an acrylic resin, a styrene resin, or a nylon resin is used. it can. In particular, a polyolefin-based microporous membrane is preferable because of its excellent ion permeability and performance of physically separating the positive electrode and the negative electrode. If necessary, the separator 40 may be formed with a layer containing inorganic particles. Examples of the inorganic particles may include insulating oxides, nitrides, sulfides, carbides, etc. It is preferable to contain TiO 2 or Al 2 O 3 .
　上記のような各構成が、電極積層体６０として積層されると、正極２０に形成された正極集電体端子部２４の全ては、負極３０に形成された負極集電体端子部３４の全ては、それぞれ超音波溶着などにより互いに固着される。 When each of the above configurations is laminated as the electrode laminate 60, all of the positive electrode current collector terminal portions 24 formed on the positive electrode 20 are all of the negative electrode current collector terminal portions 34 formed on the negative electrode 30. Are fixed to each other by ultrasonic welding or the like.
　さらに、図２に示すように、正極２０の負極集電体端子部３４は、正極引き出しタブ１２０に導電接続され、また、負極３０の負極端子部は、負極引き出しタブ１３０に導電接続される。 Further, as shown in FIG. 2, the negative electrode current collector terminal portion 34 of the positive electrode 20 is conductively connected to the positive electrode lead tab 120, and the negative electrode terminal portion of the negative electrode 30 is conductively connected to the negative electrode lead tab 130.
　正極引き出しタブ１２０にはアルミニウムやアルミニウム合金で構成されたものが用いられ、負極引き出しタブ１３０にはニッケルまたは銅、銅合金が用いられる。負極引き出しタブ１３０を銅や銅合金の板で構成する場合、表面にニッケルめっきを施してもよい。 The positive electrode extraction tab 120 is made of aluminum or an aluminum alloy, and the negative electrode extraction tab 130 is made of nickel, copper, or copper alloy. When the negative electrode lead tab 130 is made of a copper or copper alloy plate, nickel plating may be applied to the surface.
　また、上記のような各構成が、電極積層体６０として積層されると、図２に示すように、電極積層体６０の対向する２辺側の２箇所において接着テープ６５などによる固着を行い、積層状態の保持を確実とするようにすることが好ましい。 Further, when each of the above-described configurations is laminated as the electrode laminate 60, as shown in FIG. 2, the two portions on the opposite two sides of the electrode laminate 60 are fixed by the adhesive tape 65 or the like, It is preferable to ensure that the laminated state is maintained.
　図２に示されるように形成された電極積層体６０及び電解液（不図示）は、正極引き出しタブ１２０及び負極引き出しタブ１３０が引き出された状態で、ラミネートフィルム外装材８０内に封止され、図３に示されるような電池１００とされる。 The electrode laminate 60 and the electrolyte solution (not shown) formed as shown in FIG. 2 are sealed in the laminate film exterior member 80 in a state where the positive electrode extraction tab 120 and the negative electrode extraction tab 130 are extracted, A battery 100 as shown in FIG.
　本実施形態では、ラミネートフィルム外装材８０は、電極積層体６０をその積層方向両側から挟んで包囲する２枚のラミネートフィルムからなり、電極積層体６０の周囲で重なり合った対向面同士における第１辺１１１、第２辺１１２、第３辺１１３、第４辺１１４を熱溶着し、熱溶着部（封止領域）８１を形成することで、電極積層体６０が電解液（不図示）と共に封止されている。ラミネートフィルム外装材８０において、第１辺１１１からは正極引き出しタブ１２０が、また、第２辺１１２からは負極引き出しタブ１３０が引き出される。 In the present embodiment, the laminate film exterior member 80 is composed of two laminate films surrounding and sandwiching the electrode laminate 60 from both sides in the lamination direction, and the first sides of the opposing surfaces that overlap each other around the electrode laminate 60. 111, the second side 112, the third side 113, and the fourth side 114 are heat-welded to form a heat-welded portion (sealing region) 81, so that the electrode stack 60 is sealed together with an electrolyte (not shown). Has been. In the laminate film exterior member 80, the positive electrode pull-out tab 120 is pulled out from the first side 111, and the negative electrode pull-out tab 130 is pulled out from the second side 112.
　なお、本実施形態では、２枚のラミネートフィルムで電極積層体６０と電解液（不図示）とを封止する構成としたが、１枚のラミネートフィルを折り返すようにして電極積層体６０と電解液（不図示）とを封止する構成としてもよい。 In this embodiment, the electrode laminate 60 and the electrolyte solution (not shown) are sealed with two laminate films. However, the electrode laminate 60 and the electrolysis are folded so that one laminate film is folded. It is good also as a structure which seals a liquid (not shown).
  ラミネートフィルム外装材８０を構成するラミネートフィルムとしては、柔軟性を有しており、かつ電解液が漏洩しないように、電極積層体６０と電解液（不図示）を封止できるものであれば、この種のフィルム外装電池に一般に用いられるフィルムを用いることができる。 As a laminate film constituting the laminate film exterior material 80, as long as it has flexibility and can seal the electrode laminate 60 and the electrolyte (not shown) so that the electrolyte does not leak, The film generally used for this kind of film-clad battery can be used.
　ラミネートフィルム外装材８０に用いられるラミネートフィルムの代表的な層構成としては、金属薄膜層と熱溶着性樹脂層とを積層し、さらに、金属薄膜層の熱溶着性樹脂層と反対側の面にさらに、ポリエチレンテレフタレートなどのポリエステルやナイロン等のフィルムからなる保護用樹脂層を積層した構成が挙げられる。電極積層体６０、電解液を封止するに際しては、熱溶着性樹脂層を対向させて電極積層体６０を包囲する。 As a typical layer structure of the laminate film used for the laminate film exterior material 80, a metal thin film layer and a heat-weldable resin layer are laminated, and further, on the surface opposite to the heat-weldable resin layer of the metal thin film layer. Furthermore, the structure which laminated | stacked the protective resin layer which consists of films, such as polyester, nylon, such as a polyethylene terephthalate, is mentioned. When sealing the electrode laminate 60 and the electrolytic solution, the electrode laminate 60 is surrounded by facing the heat-welding resin layer.
　金属薄膜層としては、例えば、厚さ１０μｍ～１００μｍの、Ａｌ、Ｔｉ、Ｔｉ合金、Ｆｅ、ステンレス、Ｍｇ合金などの箔を用いることができる。 As the metal thin film layer, for example, a foil of Al, Ti, Ti alloy, Fe, stainless steel, Mg alloy or the like having a thickness of 10 μm to 100 μm can be used.
　熱溶着性樹脂層に用いられる樹脂としては、熱溶着が可能な樹脂であれば特に制限はなく、例えば、ポリプロピレン、ポリエチレン、これらの酸変成物、ポリフェニレンサルファイド、ポリエチレンテレフタレートなどのポリエステル等、ポリアミド、エチレン－酢酸ビニル共重合体などが使用できる。熱溶着性樹脂層の厚さは１０μｍ～２００μｍが好ましく、より好ましくは３０μｍ～１００μｍである。 The resin used for the heat-welding resin layer is not particularly limited as long as it can be heat-welded. For example, polypropylene, polyethylene, acid-modified products thereof, polyphenylene sulfide, polyester such as polyethylene terephthalate, polyamide, An ethylene-vinyl acetate copolymer can be used. The thickness of the heat-welding resin layer is preferably 10 μm to 200 μm, more preferably 30 μm to 100 μm.
　ラミネートフィルム外装材８０の内面は、ラミネートフィルム外装材８０の上記のような熱溶着性樹脂層となる。一方、電極積層体６０においては、最外層には必ず負極３０となるように、積層順が規定されている。したがって、電池１００においては、電極積層体６０の負極３０と、ラミネートフィルム外装材８０内面（熱溶着性樹脂層）とが当接した状態した状態となっている。 The inner surface of the laminate film exterior material 80 becomes the above-described heat-weldable resin layer of the laminate film exterior material 80. On the other hand, in the electrode laminate 60, the order of lamination is defined so that the outermost layer always becomes the negative electrode 30. Therefore, in the battery 100, the negative electrode 30 of the electrode laminate 60 and the inner surface (heat-weldable resin layer) of the laminate film exterior material 80 are in contact with each other.
　以上のように構成される電池１００における正極２０の製造過程を、図４を参照して説明する。なお、以下、正極２０の製造過程を例に挙げ説明を行うが、負極３０の製造過程は、材料が変更される点と、絶縁部材２８が形成されていない点を除けば、正極２０の製造過程と略同一である。 The manufacturing process of the positive electrode 20 in the battery 100 configured as described above will be described with reference to FIG. Hereinafter, the manufacturing process of the positive electrode 20 will be described as an example. However, the manufacturing process of the negative electrode 30 is the manufacturing of the positive electrode 20 except that the material is changed and the insulating member 28 is not formed. It is almost the same as the process.
　図４に示す正極２０の製造過程において（Ａ）→（Ｂ）→（Ｃ）の順序で正極２０の製造が進められる。また、シート基材２０３は正極２０の集電体（正極集電体本体部２２及び正極集電体端子部２４）の前駆体となる基材であり、塗工膜２０７は塗工装置２００から塗出されるスラリー２０５によって形成される所定厚さを有する膜であり、正極２０における正極活物質層２６の前駆体である。図４においては、シート基材２０３の表面の製造過程のみが図示されているが、シート基材２０３の裏面にも同様の塗工膜２０７が塗工装置２００によって形成されるものである。 In the manufacturing process of the positive electrode 20 shown in FIG. 4, the positive electrode 20 is manufactured in the order of (A) → (B) → (C). Further, the sheet base material 203 is a base material that is a precursor of the current collector of the positive electrode 20 (the positive electrode current collector main body portion 22 and the positive electrode current collector terminal portion 24), and the coating film 207 is formed from the coating device 200. It is a film having a predetermined thickness formed by the slurry 205 to be applied, and is a precursor of the positive electrode active material layer 26 in the positive electrode 20. In FIG. 4, only the manufacturing process of the front surface of the sheet base material 203 is shown, but a similar coating film 207 is formed on the back surface of the sheet base material 203 by the coating apparatus 200.
　図４（Ａ）は、塗工装置２００から間欠的にスラリー２０５を塗出して、シート基材２０３上に、塗工膜２０７が形成されている塗工部と、塗工膜２０７が形成されていない未塗工部とを交互に形成する様子を示している。塗工膜２０７は、所定の膜厚を有するシート基材２０３上のスラリー２０５によって形成されるものである。 In FIG. 4A, the slurry 205 is intermittently applied from the coating apparatus 200, and the coating portion where the coating film 207 is formed and the coating film 207 are formed on the sheet base material 203. It shows how the uncoated parts that are not formed are alternately formed. The coating film 207 is formed by the slurry 205 on the sheet base material 203 having a predetermined film thickness.
　塗工装置２００において、シート基材２０３は、図中の矢印方向に進行するように設定されている。さらに、塗工装置２００は、スラリー２０５を塗出する塗出口２６５が設けられたダイヘッド２６０を有している。この塗出口２６５の長手方向は、シート基材２０３の進行方向に対して垂直となるように設定されている。この塗出口２６５から、スラリー２０５を間欠的となるように塗出することで、図４（Ａ）に示すように、シート基材２０３上にスラリー２０５による塗工膜２０７の塗工部と、未塗工部とを交互に形成する。 In the coating apparatus 200, the sheet base material 203 is set to advance in the direction of the arrow in the figure. Furthermore, the coating apparatus 200 has a die head 260 provided with a coating outlet 265 for coating the slurry 205. The longitudinal direction of the coating outlet 265 is set to be perpendicular to the traveling direction of the sheet base material 203. By applying the slurry 205 from the coating outlet 265 so as to be intermittent, as shown in FIG. 4A, a coating portion of the coating film 207 by the slurry 205 on the sheet base material 203, Uncoated parts are formed alternately.
　塗工装置２００によって、シート基材２０３上に塗工膜２０７が形成されると、所定の乾燥工程などを経て、続いて、図４（Ｂ）に示す工程へと進む。 When the coating film 207 is formed on the sheet base material 203 by the coating apparatus 200, the process proceeds to a process shown in FIG. 4B through a predetermined drying process and the like.
　図４（Ｂ）の工程においては、シート基材２０３上における塗工膜２０７の塗工部と、未塗工部と間の境界部に絶縁部材２８が、不図示の装置によって施される。このような装置においては、例えばポリプロピレンなどのテープ状の樹脂部材に熱を加えて、溶着させることで、前記境界部に絶縁部材２８を形成することができる。 4B, the insulating member 28 is applied to the boundary portion between the coated portion of the coated film 207 and the uncoated portion on the sheet base material 203 by a device (not shown). In such an apparatus, for example, the insulating member 28 can be formed at the boundary portion by applying heat and welding to a tape-shaped resin member such as polypropylene.
　続く、図４（Ｃ）は不図示の切断装置を用い、シート基材２０３から点線で示す範囲を切り出すことによって、正極２０を得る工程を示している。正極２０の製造過程において、シート基材２０３上の塗工膜２０７として言及した箇所は、以降、正極活物質層２６と称することとする。また、シート基材２０３は、正極２０の集電体（正極集電体本体部２２、正極集電体端子部２４）と称することとする。 Next, FIG. 4C shows a process of obtaining the positive electrode 20 by cutting a range indicated by a dotted line from the sheet base material 203 using a cutting device (not shown). In the manufacturing process of the positive electrode 20, the part referred to as the coating film 207 on the sheet base material 203 is hereinafter referred to as the positive electrode active material layer 26. The sheet base material 203 is referred to as a current collector of the positive electrode 20 (a positive electrode current collector main body 22 and a positive electrode current collector terminal portion 24).
　図５は、図４（Ｃ）のＸ－Ｘ’断面を示す図である。ここでは、正極２０の正極活物質層２６は、正極活物質層２６の塗り始めや塗り終わり部分を除いた中央部であって、全体の平均膜厚とほぼ同等であって概ね一定の厚さを有し、正極活物質層２６の面積の大半を占める第１膜厚部２６ａと、正極活物質２６の一端部に位置し第１膜厚部２６ａよりも厚さが薄い第２膜厚部２６ｂとを有するものを例示している。 FIG. 5 is a view showing an X-X ′ cross section of FIG. Here, the positive electrode active material layer 26 of the positive electrode 20 is a central portion excluding the start and finish of the application of the positive electrode active material layer 26, and is substantially equal to the overall average film thickness and is substantially constant. A first film thickness portion 26a that occupies most of the area of the positive electrode active material layer 26, and a second film thickness portion that is located at one end of the positive electrode active material 26 and is thinner than the first film thickness portion 26a. 26b is illustrated.
　図４及び図５を参照すると分かるように、第２膜厚部２６ｂは、正極活物質層２６となるスラリー２０５を正極集電体の前駆体であるシート基材２０３上に塗布する際の塗り始めの部分である。 As can be seen from FIGS. 4 and 5, the second film thickness portion 26 b is applied when the slurry 205 to be the positive electrode active material layer 26 is applied onto the sheet base material 203 that is a precursor of the positive electrode current collector. This is the first part.
　第２膜厚部２６ｂの厚さと、一部がこの第２膜厚部２６ｂの上に配置される絶縁部材２８との厚さの和は、第１膜厚部２６ａの平気厚さ以下となるように、第１膜厚部２６ａ及び第２膜厚部２６ｂの厚さが設定されている。このように厚さが設定されているために、電極積層体６０を形成する際、正極２０を複数枚用いたとしても、絶縁部材２８による電極積層体６０の厚さの不均一を生ずることがない。 The sum of the thickness of the second film thickness portion 26b and the thickness of the insulating member 28 partially disposed on the second film thickness portion 26b is equal to or less than the flat thickness of the first film thickness portion 26a. As described above, the thicknesses of the first film thickness portion 26a and the second film thickness portion 26b are set. Since the thickness is set in this way, even when a plurality of positive electrodes 20 are used when forming the electrode stack 60, the thickness of the electrode stack 60 due to the insulating member 28 may be uneven. Absent.
　また、本実施形態に係る電池１００の正極２０を製造する上では、シート基材２０３上にスラリー２０５を塗布する際、未塗工部から、層厚が薄い第２膜厚部２６ｂが形成され、さらにそれに連続して、層厚が厚い第１膜厚部２６ａが形成されることを想定して、塗工膜２０７を形成していく必要がある。このため、特に、塗工膜２０７形成時の開始端部における塗工装置２００による塗工膜２０７の膜厚制御が非常に重要であることがわかる。 Further, in manufacturing the positive electrode 20 of the battery 100 according to this embodiment, when the slurry 205 is applied on the sheet base material 203, the second film thickness portion 26b having a thin layer thickness is formed from the uncoated portion. Further, it is necessary to form the coating film 207 in succession, assuming that the first film thickness portion 26a having a large layer thickness is formed. For this reason, it turns out that especially the film thickness control of the coating film 207 by the coating apparatus 200 in the starting end part at the time of forming the coating film 207 is very important.
　ところで、間欠塗工においては、塗工膜２０７の形成を開始するタイミングで、塗工弁２４０を開け、それと同時にリターン弁２５０を閉めて、塗工弁２４０からダイヘッド２６０にスラリー２０５を供給して、ダイヘッド２６０の塗出口２６５からシート基材２０３に対してスラリー２０５を塗出するようにしている。 By the way, in intermittent coating, at the timing when the formation of the coating film 207 is started, the coating valve 240 is opened, and at the same time, the return valve 250 is closed, and the slurry 205 is supplied from the coating valve 240 to the die head 260. The slurry 205 is applied from the coating outlet 265 of the die head 260 to the sheet base material 203.
　より詳細には、図１０に示すように、塗工弁２４０においては、弁体２４７を上昇させて貫通穴２４２から離間させると共に、リターン弁２５０においては、弁体２５７は下降させて貫通穴２５２を塞ぐような動作を行うこととなる。 More specifically, as shown in FIG. 10, in the coating valve 240, the valve body 247 is raised and separated from the through hole 242, and in the return valve 250, the valve body 257 is lowered and the through hole 252. The operation that closes the screen is performed.
　このとき、スラリー２０５中に矢印に示すような圧力が掛かり、これにより、ダイヘッド２６０の塗出口２６５からシート基材２０３に対してスラリー２０５を塗出する圧力が想定よりも高まり、ダイヘッド２６０から塗出するスラリー２０５の塗出量が不安定になるおそれがあった。 At this time, a pressure as indicated by an arrow is applied to the slurry 205, whereby the pressure at which the slurry 205 is applied to the sheet base material 203 from the coating outlet 265 of the die head 260 is higher than expected, and the coating is applied from the die head 260. There was a possibility that the amount of the slurry 205 to be dispensed would become unstable.
　さらに、シート基材２０３上に塗布するスラリー２０５の塗出量の制御ができないと、所望の塗工膜２０７を得ることができず、リチウムイオン二次電池の性能にも悪影響を与えてしまう可能性もあった。 Furthermore, if the coating amount of the slurry 205 applied on the sheet base material 203 cannot be controlled, the desired coating film 207 cannot be obtained and the performance of the lithium ion secondary battery may be adversely affected. There was also sex.
　このような製造方法によると、特に、シート基材２０３上にスラリー２０５の塗布を開始するタイミングでのスラリー２０５の塗出量の制御、そしてそれに伴う、塗工膜２０７の膜厚の制御が不安になる可能性がある上、層厚が薄い第２膜厚部２６ｂを形成する場合には、いっそう複雑な制御によって塗工膜２０７を形成する必要があった。 According to such a manufacturing method, in particular, the control of the coating amount of the slurry 205 at the timing of starting the application of the slurry 205 on the sheet base material 203 and the control of the film thickness of the coating film 207 accompanying the control are uneasy. In addition, when the second film thickness portion 26b having a small layer thickness is formed, it is necessary to form the coating film 207 by more complicated control.
　このような課題を解決するために、本発明に係る電池用電極の製造方法で用いる塗工装置２００においては、リターン弁の弁体が弁座に対して水平または回転方向に作動する弁である弁構造を有するものが採用されることを特長としている。 In order to solve such a problem, in the coating apparatus 200 used in the battery electrode manufacturing method according to the present invention, the valve body of the return valve is a valve that operates in a horizontal or rotational direction with respect to the valve seat. It features that what has a valve structure is adopted.
　図６は本発明に係る電池用電極の製造方法で用いられる塗工装置２００における塗工弁２４０及びリターン弁３００の動作を説明する図である。 FIG. 6 is a view for explaining the operation of the coating valve 240 and the return valve 300 in the coating apparatus 200 used in the battery electrode manufacturing method according to the present invention.
　本発明で用いる塗工装置２００の塗工弁２４０は、塗工弁の弁体が弁座に対して垂直に作動する弁である。すなわち、塗工弁２４０としては、弁座２４３に設けられた貫通穴２４２を、弁体２４７が塞いだり開いたりすることで、流量を制御するものであって、玉形弁などが用いられる。 The coating valve 240 of the coating apparatus 200 used in the present invention is a valve in which the valve body of the coating valve operates perpendicularly to the valve seat. That is, as the coating valve 240, the valve body 247 closes or opens the through hole 242 provided in the valve seat 243 to control the flow rate, and a ball valve or the like is used.
　一方、リターン弁３００としては、リターン弁の弁体が弁座に対して水平または回転方向に作動する弁であり、仕切弁やボール弁などが挙げられる。図６は仕切弁を模式的に表したものである。本実施形態では図６に示すように、リターン弁３００としては、弁箱３０１内に設けられ仕切弁体３０７が、弁箱３０１内のスラリー２０５の流れを仕切ることで、流量を制御する仕切弁が用いられる。このような仕切弁は、流量の制御において水撃作用のような高圧を発生させにくいというだけでなく、配管を通じて接続されている塗工弁への流量の変動までも極めて小さくできることが明らかとなった。 On the other hand, the return valve 300 is a valve in which the valve body of the return valve operates in a horizontal or rotational direction with respect to the valve seat, and includes a gate valve and a ball valve. FIG. 6 schematically shows a gate valve. In this embodiment, as shown in FIG. 6, the return valve 300 is a gate valve that is provided in the valve box 301 and controls the flow rate by partitioning the flow of the slurry 205 in the valve box 301 by the gate valve body 307. Is used. It is clear that such a gate valve not only does not easily generate a high pressure such as a water hammer effect in the control of the flow rate, but can also extremely reduce the fluctuation of the flow rate to the coating valve connected through the piping. It was.
　リターン弁３００で用いられる仕切弁においては、スラリー２０５の流れに対して、略垂直方向から仕切弁体３０７が抜き差しされることで、スラリー２０５の流量が制御されることから、リターン弁３００の開閉時、図１０の矢印に示したような圧力がスラリー２０５中に発生することがなく、ダイヘッド２６０からシート基材２０３上に塗出するスラリー２０５の塗出量の制御が容易となり、これに伴い、シート基材２０３上に塗布するスラリー２０５の膜厚の制御も容易となる。 In the gate valve used in the return valve 300, the flow rate of the slurry 205 is controlled by inserting and removing the gate valve body 307 from a substantially vertical direction with respect to the flow of the slurry 205. At this time, the pressure as shown by the arrow in FIG. 10 is not generated in the slurry 205, and the amount of the slurry 205 applied from the die head 260 onto the sheet base material 203 can be easily controlled. In addition, it becomes easy to control the film thickness of the slurry 205 applied on the sheet base material 203.
　次に、以上のように構成される、本発明で用いる塗工装置２００の塗工弁２４０及びリターン弁３００の制御について説明する。 Next, the control of the coating valve 240 and the return valve 300 of the coating apparatus 200 used in the present invention configured as described above will be described.
　図７は塗工装置２００の塗工弁２４０及びリターン弁３００の動作タイミングの一例を示す図である。図７で示す動作タイミングは、図４及び図５で示した塗工膜２０７（正極活物質層２６）を形成する際のものである。すなわち、シート基材２０３上に、未塗工部から、層厚が薄い第２膜厚部２６ｂが形成され、さらにそれに連続して、層厚が厚い第１膜厚部２６ａが形成されることを想定して、塗工膜２０７を形成する際の動作タイミングを示すものである。 FIG. 7 is a diagram illustrating an example of operation timings of the coating valve 240 and the return valve 300 of the coating apparatus 200. The operation timing shown in FIG. 7 is for forming the coating film 207 (positive electrode active material layer 26) shown in FIGS. That is, the second film thickness portion 26b having a thin layer thickness is formed on the sheet base material 203 from the uncoated portion, and the first film thickness portion 26a having a thick layer thickness is formed continuously. The operation timing when forming the coating film 207 is shown.
　なお、図７において、開度０［％］とは流路が完全に遮断される弁の開度を言う。一方、開度１００［％］とは、流量が１００［％］であるものとして使用者が想定しているときの弁の開度を言い、弁自体の性能としての開度１００［％］を言うのではない。 In FIG. 7, the opening degree 0 [%] means the opening degree of the valve at which the flow path is completely blocked. On the other hand, the opening degree 100 [%] means the opening degree of the valve when the user assumes that the flow rate is 100 [%], and the opening degree 100 [%] as the performance of the valve itself. Not to say.
　以下、図７を時系列で説明する。図７の横軸は時間軸を示している。また、図７の上段は塗工弁２４０の開度を、また、下段はリターン弁３００の開度をそれぞれ示している。 Hereinafter, FIG. 7 will be described in time series. The horizontal axis in FIG. 7 represents the time axis. 7 shows the opening degree of the coating valve 240, and the lower part shows the opening degree of the return valve 300.
　シート基材２０３上に塗工膜２０７の塗工を開始しようとする瞬間（ｔ０）においては、塗工弁２４０の開度を０％から増加させると同時に、リターン弁３００の開度を１００％から減少させるようにしている。 At the moment (t 0 ) at which application of the coating film 207 is to be started on the sheet substrate 203, the opening degree of the coating valve 240 is increased from 0% and the opening degree of the return valve 300 is set to 100. It is trying to decrease from%.
　なお、以下、時間ｔのサフィックスの数字が小さいほど、経過時間が少ないときの時間であるものとする。 In the following, it is assumed that the smaller the time t suffix number, the shorter the elapsed time.
　ｔ１においては、塗工弁２４０の開度上昇は一端停止し、開度一定とする。これにより、第２膜厚部２６ｂに相当する塗工膜２０７を形成するようにする。一方、ｔ０で開度１００％から開度を減少させていたリターン弁３００の開度はｔ２において０％となる。 In t 1, the opening degree increase in Nurikoben 240 temporarily stopped, the opening degree constant. Thereby, the coating film 207 corresponding to the second film thickness portion 26b is formed. On the other hand, the opening degree of the return valve 300 which has reduced the degree of opening from 100% opening at t 0 is 0% at t 2.
　塗工弁２４０で開度一定とされていた開度は、ｔ３において再び増加させて、ｔ４で開度１００％として、第１膜厚部２６ａに相当する塗工膜２０７を形成するようにする。 Opening which has been a degree of opening fixed in Nurikoben 240 increases again at t 3, 100% opening at t 4, to form a coating film 207 corresponding to the first film thickness portion 26a To.
　第１膜厚部２６ａに相当する塗工膜２０７を形成する期間を終了するために塗工弁２４０の開度を１００％から減少させるタイミングより若干早いタイミングであるｔ５において、リターン弁３００の開度を０％から上昇させる。 In t 5 is slightly earlier than the timing of reducing the degree of opening of Nurikoben 240 from 100% to terminate the period for forming the coating film 207 corresponding to the first film thickness portion 26a, the return valve 300 Increase the opening from 0%.
　一方、塗工弁２４０の開度は、ｔ６で１００％から減少を開始させる。塗工弁２４０の開度が０％となるタイミング、及び、リターン弁３００の開度が１００％となるタイミングは、ｔ７で一致するように制御される。 On the other hand, the opening degree of Nurikoben 240 starts the reduction from 100% t 6. Timing the opening of Nurikoben 240 is 0% and, timing the opening of the return valve 300 is 100%, is controlled so as to coincide with t 7.
　以上のような塗工弁２４０及びリターン弁３００の動作タイミングによって、シート基材２０３上に、未塗工部から、層厚が薄い第２膜厚部２６ｂ、さらにそれに連続した、層厚が厚い第１膜厚部２６ａを想定した塗工膜２０７を形成することが可能となる。 According to the operation timing of the coating valve 240 and the return valve 300 as described above, the layer thickness on the sheet base material 203 from the uncoated portion to the second thin film thickness portion 26b having a thin layer thickness and further to the thick layer thickness. The coating film 207 that assumes the first film thickness portion 26a can be formed.
　以上、本発明に係る電池用電極の製造方法・製造装置は、前記塗工弁２４０が玉形弁であり、前記リターン弁３００が仕切弁であり、前記仕切弁の開閉時における仕切弁体の移動が、前記塗工弁２４０に影響を与えることがないので、このような本発明に係る電池用電極の製造方法・製造装置によれば、前記塗工弁２４０、前記リターン弁３００の動作に伴うダイヘッド２６０内におけるスラリー２０５の圧力の変動を抑制することができ、ダイヘッド２６０から塗出するスラリー２０５の塗出量の制御が容易となり、所望とする塗工膜を得ることができ、リチウムイオン二次電池の性能向上に資することができる。 As described above, in the battery electrode manufacturing method and manufacturing apparatus according to the present invention, the coating valve 240 is a ball valve, the return valve 300 is a gate valve, and the gate valve body is opened and closed when the gate valve is opened and closed. Since the movement does not affect the coating valve 240, according to the battery electrode manufacturing method and manufacturing apparatus according to the present invention, the operation of the coating valve 240 and the return valve 300 is performed. As a result, fluctuations in the pressure of the slurry 205 in the die head 260 can be suppressed, the amount of the slurry 205 applied from the die head 260 can be easily controlled, and a desired coating film can be obtained. This can contribute to improving the performance of the secondary battery.
　また、前記のような製造方法を用いて製造された、本発明に係る電池用電極によれば、電池１００の性能を向上させることができる。 In addition, according to the battery electrode according to the present invention manufactured using the manufacturing method as described above, the performance of the battery 100 can be improved.
　また、前記のような電池用電極が用いられた、本発明に係る電池によれば、より性能を向上させた電池１００を提供することが可能となる。 Moreover, according to the battery according to the present invention using the battery electrode as described above, it is possible to provide the battery 100 with improved performance.
　次に、本発明の他の実施形態について説明する。図８は本発明の他の実施形態に係る電池用電極の製造方法で用いられる塗工装置２００における塗工弁２４０及びリターン弁３００の動作を説明する図である。 Next, another embodiment of the present invention will be described. FIG. 8 is a view for explaining the operation of the coating valve 240 and the return valve 300 in the coating apparatus 200 used in the method for manufacturing a battery electrode according to another embodiment of the present invention.
　他の実施形態で用いる塗工装置２００が、先の図６に示した塗工装置２００と相違する点は、リターン弁３００において仕切弁体３０７が複数設けられる点のみで、その他の構成は同様である。他の実施形態で用いる塗工装置２００においては、２つの仕切弁体３０７が、弁箱３０１内のスラリー２０５の流れを仕切る構成となっているが、３つ以上の仕切弁体３０７によって、弁箱３０１内のスラリー２０５の流れを仕切るようにしてもよい。 The coating apparatus 200 used in another embodiment is different from the coating apparatus 200 shown in FIG. 6 only in that a plurality of gate valve bodies 307 are provided in the return valve 300, and the other configurations are the same. It is. In the coating apparatus 200 used in other embodiments, the two gate valve bodies 307 are configured to partition the flow of the slurry 205 in the valve box 301. However, the valve is formed by three or more gate valve bodies 307. The flow of the slurry 205 in the box 301 may be partitioned.
　他の実施形態に係るリターン弁３００で用いられる仕切弁においては、スラリー２０５の流れに対して、略垂直方向から、複数の仕切弁体３０７が抜き差しされることで、先の実施形態の場合より、より精密な流量制御を可能とするものである。 In the gate valve used in the return valve 300 according to another embodiment, the plurality of gate valve bodies 307 are inserted / removed from a substantially vertical direction with respect to the flow of the slurry 205, so that the case of the previous embodiment. Therefore, more precise flow rate control is possible.
　このような他の実施形態によれば、ダイヘッド２６０から塗出するスラリー２０５の塗出量の制御が非常に容易となり、所望とする塗工膜を得ることができ、リチウムイオン二次電池の性能向上に資することができる。 According to such another embodiment, it becomes very easy to control the coating amount of the slurry 205 to be coated from the die head 260, a desired coating film can be obtained, and the performance of the lithium ion secondary battery It can contribute to improvement.
産業上の利用性Industrial availability
　本発明は、小型化、軽量化が可能で、エネルギー密度が大きいリチウムイオン二次電池などの電池用電極の製造方法・製造装置に関するものである。従来、電池用電極の製造方法・製造装置においては、活物質粒子を含有するスラリーを、集電体などのシート基材上へ塗布する際、スラリー塗出量の制御が難しく、所望の塗工膜を得ることができず、リチウムイオン二次電池の性能にも悪影響を与えてしまう、という問題があった。 The present invention relates to a method and an apparatus for manufacturing an electrode for a battery such as a lithium ion secondary battery that can be reduced in size and weight and has a large energy density. Conventionally, in a manufacturing method and manufacturing apparatus for battery electrodes, when applying a slurry containing active material particles onto a sheet substrate such as a current collector, it is difficult to control the amount of slurry applied, and the desired coating There was a problem that a film could not be obtained and the performance of the lithium ion secondary battery was adversely affected.
　　これに対して、本発明に係る電池用電極の製造方法・製造装置は、リターン弁の弁体が弁座に対して水平または回転方向に作動する弁であり、リターン弁の開閉時における弁体の移動が、塗工弁に影響を与えることがないので、このような本発明に係る電池用電極の製造方法・製造装置によれば、前記塗工弁、前記リターン弁の動作に伴うダイヘッド内におけるスラリーの圧力の変動を抑制することができ、ダイヘッドから塗出するスラリーの塗出量の制御が容易となり、所望とする塗工膜を得ることができ、リチウムイオン二次電池の性能向上に資することができる。 In contrast, the battery electrode manufacturing method and manufacturing apparatus according to the present invention is a valve in which the valve body of the return valve operates in a horizontal or rotational direction with respect to the valve seat, and the valve body at the time of opening and closing the return valve Therefore, according to the battery electrode manufacturing method / manufacturing apparatus of the present invention, the inside of the die head accompanying the operation of the coating valve and the return valve is not affected by the movement of the coating valve. The fluctuation of the slurry pressure can be suppressed, the amount of slurry applied from the die head can be easily controlled, the desired coating film can be obtained, and the performance of the lithium ion secondary battery can be improved. Can contribute.
２０・・・正極
２２・・・正極集電体本体部
２４・・・正極集電体端子部
２６・・・正極活物質層
２６ａ・・・第１膜厚部
２６ｂ・・・第２膜厚部
２８・・・絶縁部材
３０・・・負極
３２・・・負極集電体本体部
３４・・・負極集電体端子部
３６・・・負極活物質層
４０・・・セパレーター
６０・・・電極積層体
６５・・・接着テープ
８０・・・ラミネートフィルム外装材
８１・・・熱溶着部（封止領域）
１００・・・電池
１１０・・・電池本体部
１１１・・・第１辺
１１２・・・第２辺
１１３・・・第３辺
１１４・・・第４辺
１２０・・・正極引き出しタブ
１３０・・・負極引き出しタブ
２００・・・塗工装置
２０３・・・シート基材
２０５・・・スラリー
２０７・・・塗工膜
２１０・・・配管
２２０・・・タンク
２３０・・・ポンプ
２４０・・・塗工弁
２４１・・・弁箱
２４２・・・貫通穴
２４３・・・弁座
２４５・・・シリンダー
２４６・・・シャフト
２４７・・・弁体
２５０・・・リターン弁
２５１・・・弁箱
２５２・・・貫通穴
２５３・・・弁座
２５５・・・シリンダー
２５６・・・シャフト
２５７・・・弁体
２６０・・・ダイヘッド
２６１・・・流入口
２６３・・・マニホールド
２６５・・・塗出口
２７０・・・バックロール
３００・・・リターン弁
３０１・・・弁箱
３０７・・・仕切弁体 DESCRIPTION OF SYMBOLS 20 ... Positive electrode 22 ... Positive electrode collector main-body part 24 ... Positive electrode collector terminal part 26 ... Positive electrode active material layer 26a ... 1st film thickness part 26b ... 2nd film thickness Portion 28 ... Insulating member 30 ... Negative electrode 32 ... Negative electrode current collector body 34 ... Negative electrode current collector terminal 36 ... Negative electrode active material layer 40 ... Separator 60 ... Electrode Laminate 65 ... Adhesive tape 80 ... Laminate film exterior material 81 ... Thermal weld (sealing region)
DESCRIPTION OF SYMBOLS 100 ... Battery 110 ... Battery main-body part 111 ... 1st edge 112 ... 2nd edge 113 ... 3rd edge 114 ... 4th edge 120 ... Positive electrode extraction tab 130 ...・ Negative electrode extraction tab 200... Coating device 203... Sheet base material 205... Slurry 207... Coating film 210. Engineering valve 241 ... Valve box 242 ... Through hole 243 ... Valve seat 245 ... Cylinder 246 ... Shaft 247 ... Valve body 250 ... Return valve 251 ... Valve box 252 .... Through hole 253 ... Valve seat 255 ... Cylinder 256 ... Shaft 257 ... Valve body 260 ... Die head 261 ... Inlet 263 ... Manifold 265 ... Outlet 270 ..Back roll 300 ... return valve 301 ... valve box 307 ... partition valve body

Claims (13)

  1. スラリーを貯溜するタンクと、
    ローラによって搬送されるシート基材に対して、スラリーを吐出する塗出口を有するヘッドと、
    開閉することによって前記ヘッドへのスラリーの流入量を制御する塗工弁と、
    開閉することによって前記タンクへのスラリーの流入量を制御するリターン弁と、
    前記タンクから圧送されるスラリーを前記塗工弁及び前記リターン弁の双方に供給する配管と、
    を有する塗工装置によって電池用電極を製造する方法であって、
    前記リターン弁の弁体が弁座に対して水平または回転方向に作動する弁であり、
    前記塗工弁の開度の制御、及び、前記リターン弁の開度の制御を行うことで吐出するスラリーの量を調整するステップを有する電池用電極の製造方法。     A tank for storing slurry;
    A head having a coating outlet for discharging slurry to a sheet substrate conveyed by a roller;
    A coating valve that controls the amount of slurry flowing into the head by opening and closing;
    A return valve that controls the amount of slurry flowing into the tank by opening and closing;
    Piping for supplying slurry fed from the tank to both the coating valve and the return valve;
    A method for producing a battery electrode by a coating apparatus having
    The valve body of the return valve is a valve that operates in a horizontal or rotational direction with respect to the valve seat,
    A method for manufacturing a battery electrode, comprising: adjusting the amount of slurry discharged by controlling the opening of the coating valve and controlling the opening of the return valve.
  2. 前記塗工弁の弁体が弁座に対して垂直に作動する弁である請求項１に記載の電池用電極の製造方法。 The battery electrode manufacturing method according to claim 1, wherein the valve body of the coating valve is a valve that operates perpendicularly to a valve seat.
  3. 前記塗工弁の開度を０％から増加させる時、
    前記リターン弁の開度を１００％から減少させる請求項１又は請求項２に記載の電池用電極の製造方法。     When increasing the opening of the coating valve from 0%,
    The battery electrode manufacturing method according to claim 1, wherein the opening degree of the return valve is reduced from 100%.
  4. 前記塗工弁の開度を０％から１００％に増加させる途中に開度を一定に保つ期間を設けた請求項１乃至請求項３のいずれか１項に記載の電池用電極の製造方法。 The method for manufacturing a battery electrode according to any one of claims 1 to 3, wherein a period for keeping the opening constant is provided in the middle of increasing the opening of the coating valve from 0% to 100%.
  5. 前記塗工弁の開度が０％となる時、前記リターン弁の開度が１００％となるように、
    前記塗工弁の開度を減少させ、前記リターン弁の開度を増加させる請求項１乃至請求項４のいずれか１項に記載の電池用電極の製造方法。     When the opening of the coating valve is 0%, the opening of the return valve is 100%.
    The method for manufacturing a battery electrode according to any one of claims 1 to 4, wherein the opening degree of the coating valve is decreased and the opening degree of the return valve is increased.
  6. スラリーを貯溜するタンクと、
    ローラによって搬送されるシート基材に対して、スラリーを吐出する塗出口を有するヘッドと、
    開閉することによって前記ヘッドへのスラリーの流入量を制御する塗工弁と、
    開閉することによって前記タンクへのスラリーの流入量を制御するリターン弁と、
    前記タンクから圧送されるスラリーを前記塗工弁及び前記リターン弁の双方に供給する配管と、
    を有する電池用電極を製造する装置であって、
    前記塗工弁の弁体が弁座に対して垂直に作動する弁であり、
    前記リターン弁の弁体が弁座に対して水平または回転方向に作動する弁である電池用電極の製造装置。     A tank for storing slurry;
    A head having a coating outlet for discharging slurry to a sheet substrate conveyed by a roller;
    A coating valve that controls the amount of slurry flowing into the head by opening and closing;
    A return valve that controls the amount of slurry flowing into the tank by opening and closing;
    Piping for supplying slurry fed from the tank to both the coating valve and the return valve;
    An apparatus for manufacturing a battery electrode having
    The valve body of the coating valve is a valve that operates perpendicular to the valve seat;
    An apparatus for manufacturing a battery electrode, wherein the valve body of the return valve is a valve that operates in a horizontal or rotational direction with respect to a valve seat.
  7. 前記塗工弁の開度を０％から増加させる時、
    前記リターン弁の開度を１００％から減少させる請求項６に記載の電池用電極の製造装置。     When increasing the opening of the coating valve from 0%,
    The battery electrode manufacturing apparatus according to claim 6, wherein the opening degree of the return valve is decreased from 100%.
  8. 前記塗工弁の開度を０％から１００％に増加させる途中に開度を一定に保つ期間を設けた請求項６又は請求項７に記載の電池用電極の製造装置。 The battery electrode manufacturing apparatus according to claim 6 or 7, wherein a period for keeping the opening constant is provided in the middle of increasing the opening of the coating valve from 0% to 100%.
  9. 前記塗工弁の開度が０％となる時、前記リターン弁の開度が１００％となるように、
    前記塗工弁の開度を減少させ、前記リターン弁の開度を増加させる請求項６乃至請求項８のいずれか１項に記載の電池用電極の製造装置。     When the opening of the coating valve is 0%, the opening of the return valve is 100%.
    The battery electrode manufacturing apparatus according to claim 6, wherein the opening degree of the coating valve is decreased and the opening degree of the return valve is increased.
  10. 請求項１乃至５のいずれか１項に記載の電池用電極の製造方法を用いて、
    シート基材上に、間欠的に設けられたスラリーにより活物質層を形成した電池用電極。     Using the method for manufacturing a battery electrode according to any one of claims 1 to 5,
    A battery electrode in which an active material layer is formed on a sheet base material by slurry provided intermittently.
  11. 活物質層が、厚みが略一定の第１膜厚部と、第１膜厚部よりも厚さが薄い第２膜厚部と、からなり、
    活物質層が設けられている部分と、活物質層が設けられていない部分の境界に第２膜厚部が配された請求項１０に記載の電池用電極。     The active material layer comprises a first film thickness portion having a substantially constant thickness and a second film thickness portion having a thickness smaller than the first film thickness portion,
    The battery electrode according to claim 10, wherein the second film thickness portion is arranged at a boundary between a portion where the active material layer is provided and a portion where the active material layer is not provided.
  12. 活物質層が設けられている部分と、活物質層が設けられていない部分の境界に絶縁部材が配された請求項１０又は請求項１１に記載の電池用電極。 The battery electrode according to claim 10 or 11, wherein an insulating member is disposed at a boundary between a portion where the active material layer is provided and a portion where the active material layer is not provided.
  13. 請求項１０乃至１２のいずれか１項に記載の電池用電極を正極又は負極のいずれかとして用い、
    前記正極と前記負極とをセパレーターを介して積層した電極積層体と、電解液とが外装材の内部に収容されると共に、
    前記正極と導電接続された正極引き出しタブと、前記負極と導電接続された負極引き出しタブとが前記外装材の外部に引き出される電池。     The battery electrode according to any one of claims 10 to 12 is used as either a positive electrode or a negative electrode,
    An electrode laminate in which the positive electrode and the negative electrode are laminated via a separator, and an electrolytic solution are housed in the exterior material,
    A battery in which a positive electrode extraction tab conductively connected to the positive electrode and a negative electrode extraction tab conductively connected to the negative electrode are drawn out of the exterior material.
PCT/JP2017/031970 2016-09-14 2017-09-05 Battery electrode manufacturing method, battery electrode manufacturing device, battery electrode, and battery WO2018051850A1 (en)

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012047245A (en) * 2010-08-26 2012-03-08 Hirano Tecseed Co Ltd Valve and coating device using the same
JP2014079669A (en) * 2012-10-15 2014-05-08 Toyota Motor Corp Coating device and coating method
JP2014188449A (en) * 2013-03-27 2014-10-06 Nec Corp Intermittent coating apparatus and intermittent coating method
JP2014188426A (en) * 2013-03-27 2014-10-06 Nec Corp Intermittent coating apparatus and coating method
JP2015010706A (en) * 2013-07-02 2015-01-19 株式会社テクノスマート Valve device, and coating device
JP2015062853A (en) * 2013-09-24 2015-04-09 日本電気株式会社 Intermittent coating apparatus and intermittent coating method
JP2015112520A (en) * 2013-12-10 2015-06-22 株式会社ヒラノテクシード Intermittent coating apparatus
WO2016063612A1 (en) * 2014-10-21 2016-04-28 Ｎｅｃエナジーデバイス株式会社 Method and apparatus for manufacturing electrode for secondary battery, electrode for secondary battery, and secondary battery
JP2017047393A (en) * 2015-09-04 2017-03-09 Ｎｅｃエナジーデバイス株式会社 Coating device and electrode manufactured by the same

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012047245A (en) * 2010-08-26 2012-03-08 Hirano Tecseed Co Ltd Valve and coating device using the same
JP2014079669A (en) * 2012-10-15 2014-05-08 Toyota Motor Corp Coating device and coating method
JP2014188449A (en) * 2013-03-27 2014-10-06 Nec Corp Intermittent coating apparatus and intermittent coating method
JP2014188426A (en) * 2013-03-27 2014-10-06 Nec Corp Intermittent coating apparatus and coating method
JP2015010706A (en) * 2013-07-02 2015-01-19 株式会社テクノスマート Valve device, and coating device
JP2015062853A (en) * 2013-09-24 2015-04-09 日本電気株式会社 Intermittent coating apparatus and intermittent coating method
JP2015112520A (en) * 2013-12-10 2015-06-22 株式会社ヒラノテクシード Intermittent coating apparatus
WO2016063612A1 (en) * 2014-10-21 2016-04-28 Ｎｅｃエナジーデバイス株式会社 Method and apparatus for manufacturing electrode for secondary battery, electrode for secondary battery, and secondary battery
JP2017047393A (en) * 2015-09-04 2017-03-09 Ｎｅｃエナジーデバイス株式会社 Coating device and electrode manufactured by the same

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