JP2022157911A - Active material supply device, manufacturing apparatus for electrode for battery, and active material supply method - Google Patents

Abstract

To provide an active material supply device, a manufacturing apparatus for an electrode for a battery, and an active material supply method, capable of stably supplying an active material and improving the manufacturing efficiency while the decrease in uniformity of an active material layer to be formed on a base material film is suppressed.SOLUTION: An active material supply device 300 that supplies an active material 22c in a powder form onto a base material film 21B includes a hopper 370 that internally houses the active material, and shutters 341 and 342 that are provided at positions between the hopper and the base material film conveyed in a conveyance direction D in a chamber whose internal pressure is reduced to be lower than the atmospheric pressure and configured to open and close an opening for supplying the active material toward the base material film. At least one of a first counter surface of the hopper opposing the shutter, a second counter surface of the shutter opposing the hopper, and a third counter surface of the shutter opposing the base material film to be conveyed includes processing parts 341b and 342b.SELECTED DRAWING: Figure 5

Description

TECHNICAL FIELD The present invention relates to an active material supplying apparatus, a battery electrode manufacturing apparatus, and an active material supplying method.

In recent years, there are cases in which an active material is supplied to a base film in the manufacturing process of a battery. For example, an electrode of a lithium-ion secondary battery has an active material layer on a current collector (see Patent Documents 1 and 2, for example). Such an active material layer can generally be produced by supplying a slurry for forming an active material layer in which an electrode material containing active material particles is dispersed in a liquid medium to a current collector, drying it, and then compacting it. can. On the other hand, there is also known an energy-saving and low-cost production method that does not use a liquid medium and omits the drying step.

For example, Patent Literature 1 describes a process for producing a battery electrode by supplying a powdery active material onto a current collector and then compressing the active material. By using such a powdery active material in the manufacturing process of the battery electrode, it is possible to omit the drying process and manufacture the electrode at low cost.

Japanese Patent No. 6633866 JP 2019-207750 A

However, when a powdery active material is used as in Patent Document 1, air may be involved together with the powdery active material when the active material is supplied onto the substrate film. When the active material layer containing the air is formed on the base film and the active material layer is compressed, the compressed air blows out and the electrode shape collapses (in other words, the active material layer collapses). There is a problem that the uniformity of the material layer is deteriorated).

With the intention of solving the above problems, the present inventors have discovered a configuration in which the active material is supplied onto the substrate film under a reduced pressure environment. According to the configuration discovered by the present inventors, it is possible to suppress air from remaining in the active material layer formed on the base film.

In order to efficiently manufacture a battery electrode by utilizing the structure found by the present inventors, the active material is deposited at a desired position on the base film while the base film is conveyed at a predetermined speed. supply. However, when the base film is conveyed at a predetermined speed, it is more difficult to supply the active material to a desired position on the base film in the conveying direction than when the base film is not conveyed. be.

As a technique for supplying the active material to a desired position in the conveying direction on the conveyed base film, a technique using a shutter is conceivable. That is, by providing an opening for supplying the active material toward the base film and opening and closing the opening with a shutter, the active material can be supplied to a desired position in the conveying direction on the conveyed base film. is possible. Here, when a shutter is provided in the device for supplying the active material to the base film, contact may occur between other components in the device and the shutter, or between the shutter and the active material. .

The present invention suppresses deterioration in the uniformity of the active material layer formed on the base film when manufacturing an electrode using a powdery active material, and achieves the desired level on the conveyed base film. An object of the present invention is to provide an active material supplying apparatus, a battery electrode manufacturing apparatus, and an active material supplying method capable of stably supplying an active material to a position and improving the manufacturing efficiency of a battery electrode. .

The present invention is an active material supplying apparatus for supplying a powdery active material onto a substrate film, comprising a hopper containing the active material therein, and a pressure inside the hopper being reduced below atmospheric pressure. a shutter that is provided at a position between the substrate film that is transported in the transport direction in the chamber and that opens and closes an opening for supplying the active material toward the substrate film, At least one of a first facing surface facing the shutter in the hopper, a second facing surface facing the hopper in the shutter, and a third facing surface facing the substrate film conveyed in the shutter is processed. It is an active material supply device in which a processing unit is formed.

According to the active material supplying apparatus, battery electrode manufacturing apparatus, and active material supplying method of the present invention, the active material layer formed on the substrate film when manufacturing the electrode using the powdery active material is It is possible to stably supply the active material to a desired position on the transported substrate film while suppressing deterioration in uniformity, and to improve the production efficiency of the battery electrode.

FIG. 1 is a schematic cross-sectional view of a single cell of a battery manufactured using the battery electrode manufacturing apparatus of the first embodiment. FIG. 2 is a schematic diagram of a manufacturing apparatus for the same battery electrode. FIG. 3 is a perspective view of an active material supply device that constitutes the manufacturing device for the battery electrode. FIG. 4 is a perspective view of a shutter unit in the same active material supply device. FIG. 5 is a diagram for explaining the opening/closing control of the shutter when the processed portions are formed on the first opposing surface and the second opposing surface. FIG. 6 is a diagram for explaining the opening/closing control of the shutter when the processed portions are formed on the first opposing surface and the second opposing surface. FIG. 7 is a plan view of the frame for explaining opening/closing control of the shutter. FIG. 8 is a diagram for explaining the opening/closing control of the shutter when the processed portions are formed on the first opposing surface and the second opposing surface. FIG. 9 is a diagram for explaining the opening/closing control of the shutter when the processed portions are formed on the first opposing surface and the second opposing surface. FIG. 10 is a diagram for explaining the opening/closing control of the shutter when the processed portions are formed on the first opposing surface and the second opposing surface. FIG. 11 is a diagram for explaining the opening/closing control of the shutter when the processed portions are formed on the first opposing surface, the second opposing surface, and the third opposing surface. FIG. 12 is a diagram for explaining the opening/closing control of the shutter when the processed portions are formed on the first, second, and third opposing surfaces. FIG. 13 is a diagram for explaining the opening/closing control of the shutter when the processed portions are formed on the first, second, and third opposing surfaces. FIG. 14 is a diagram for explaining the opening/closing control of the shutter when the processed portions are formed on the first opposing surface and the second opposing surface. FIG. 15 is a diagram for explaining the opening/closing control of the shutter when the processed portions are formed on the first opposing surface and the second opposing surface. FIG. 16 is a diagram for explaining the opening/closing control of the shutter when the processed portions are formed on the first opposing surface and the second opposing surface. FIG. 17 is a diagram for explaining the opening/closing control of the shutter when the processed portions are formed on the first opposing surface and the second opposing surface. FIG. 18 is a diagram for explaining the opening/closing control of the shutter when the processed portions are formed on the first opposing surface and the second opposing surface.

(First embodiment)
A first embodiment to which the present invention is applied will be described below with reference to the drawings. In addition, in the drawings used in the following explanations, characteristic parts may be enlarged for the sake of convenience for the purpose of emphasizing the characteristic parts, and the dimensional ratios, etc. of each component may not necessarily be the same as the actual ones. do not have. Also, for the same purpose, some parts may be omitted from the drawings.

<Assembled battery (secondary battery)>
The active material supplying apparatus, battery electrode manufacturing apparatus, and active material supplying method of the embodiments are applied, for example, to manufacturing a lithium ion battery. Lithium ion batteries are assembled batteries that are modularized by combining a plurality of lithium ion single cells (also referred to as single cells or battery cells), or battery packs that are made by combining multiple such assembled batteries and adjusting the voltage and capacity. used in the form.

<Single cell (battery cell)>
FIG. 1 is a schematic cross-sectional view of a single cell 10. FIG. By combining a plurality of unit cells 10, the above assembled battery can be produced. For example, the single cell 10 has a positive electrode 20 a and a negative electrode 20 b as two electrodes (battery electrodes) and a separator 30 .

The separator 30 is arranged between the positive electrode 20a and the negative electrode 20b. In the assembled battery, the plurality of unit cells 10 are stacked with the positive electrode 20a and the negative electrode 20b directed in the same direction.

The separator 30 holds an electrolyte. Thereby, the separator 30 functions as an electrolyte layer. The separator 30 is arranged between the electrode active material layers 22 of the positive electrode 20a and the negative electrode 20b to prevent them from coming into contact with each other. Thereby, the separator 30 functions as a partition wall between the positive electrode 20a and the negative electrode 20b.

The electrolyte retained in the separator 30 includes, for example, an electrolytic solution or a gel polymer electrolyte. High lithium ion conductivity is ensured by using these electrolytes. Examples of the form of the separator include porous sheet separators and non-woven fabric separators made of a polymer or fiber that absorbs and retains the electrolyte.

The positive electrode 20 a and the negative electrode 20 b each have a current collector 21 , an electrode active material layer 22 and a frame 35 . The electrode active material layer 22 and the current collector 21 are arranged in this order from the separator 30 side. The frame 35 is frame-shaped (annular). The frame 35 surrounds the electrode active material layer 22 . The frame 35 of the positive electrode 20a and the frame 35 of the negative electrode 20b are welded together and integrated. In the following description, when distinguishing between the electrode active material layers 22 of the positive electrode 20a and the negative electrode 20b, they are referred to as a positive electrode active material layer 22a and a negative electrode active material layer 22b, respectively.

<Specific example of positive electrode current collector>
As the positive electrode current collector that constitutes the positive electrode current collector layer 21a, a known current collector used in a lithium-ion single battery can be used. A resin current collector (such as the resin current collector described in JP-A-2012-150905 and International Publication No. 2015-005116) can be used. The positive electrode collector constituting the positive electrode collector layer 21a is preferably a resin collector from the viewpoint of battery characteristics and the like.

Metal current collectors include, for example, copper, aluminum, titanium, nickel, tantalum, niobium, hafnium, zirconium, zinc, tungsten, bismuth, antimony, alloys containing one or more of these metals, and the group consisting of stainless alloys. and one or more metal materials selected from These metal materials may be used in the form of thin plates, metal foils, or the like. Alternatively, a metal current collector formed by forming the above metal material on the surface of a base material other than the above metal material by sputtering, electrodeposition, coating, or the like may be used.

The resin current collector preferably contains a conductive filler and a matrix resin. Examples of the matrix resin include polyethylene (PE), polypropylene (PP), polymethylpentene (PMP) and the like, but are not particularly limited. Also, the conductive filler is not particularly limited as long as it is selected from materials having conductivity. The conductive filler may be a conductive fiber having a fibrous shape.

The resin current collector may contain other components (dispersant, cross-linking accelerator, cross-linking agent, colorant, ultraviolet absorber, plasticizer, etc.) in addition to the matrix resin and the conductive filler. Also, a plurality of resin current collectors may be laminated and used, or a resin current collector and a metal foil may be laminated and used.

Although the thickness of the positive electrode current collector layer 21a is not particularly limited, it is preferably 5 to 150 μm. When a plurality of resin current collectors are laminated and used as the positive electrode current collector layer 21a, the total thickness after lamination is preferably 5 to 150 μm. The positive electrode current collector layer 21a can be obtained, for example, by molding a conductive resin composition obtained by melt-kneading a matrix resin, a conductive filler, and a dispersing agent for a filler used if necessary into a film by a known method. can be done.

<Specific example of positive electrode active material>
The positive electrode active material layer 22a is preferably a non-bound mixture containing a positive electrode active material. Here, the non-bound body means that the position of the positive electrode active material is not fixed in the positive electrode active material layer, and the positive electrode active materials and the positive electrode active materials and the positive electrode active material and the current collector are irreversibly means not fixed. When the positive electrode active material layer 22a is a non-bound body, the positive electrode active materials are not irreversibly fixed to each other. Even when stress is applied to the material layer 22a, the positive electrode active material moves, which is preferable because the destruction of the positive electrode active material layer 22a can be prevented. The positive electrode active material layer 22a, which is a non-binder, can be obtained by a method such as changing the positive electrode active material layer 22a into a positive electrode active material layer 22a containing a positive electrode active material and an electrolytic solution but not containing a binder. can. In this specification, the binder means an agent that cannot reversibly fix the positive electrode active materials together and the positive electrode active material and the current collector, and includes starch, polyvinylidene fluoride, polyvinyl alcohol, carboxyl Known solvent-drying type binders for lithium ion batteries such as methylcellulose, polyvinylpyrrolidone, tetrafluoroethylene, styrene-butadiene rubber, polyethylene and polypropylene can be used. These binders are used by dissolving or dispersing them in a solvent, and by volatilizing and distilling off the solvent, the surface solidifies without exhibiting stickiness. cannot be reversibly fixed.

Examples of the positive electrode active material include, but are not particularly limited to, a composite oxide of lithium and a transition metal, a composite oxide containing two transition metal elements, and a composite oxide containing three or more metal elements. .

The positive electrode active material may be a coated positive electrode active material in which at least part of the surface is coated with a coating material containing a polymer compound. When the positive electrode active material is covered with the coating material, the volume change of the positive electrode is moderated, and the expansion of the positive electrode can be suppressed.

As the polymer compound constituting the coating material, those described as active material coating resins in JP-A-2017-054703 and WO-2015-005117 can be preferably used.

The coating material may contain a conductive agent. As the conductive agent, the same conductive filler as contained in the positive electrode current collector layer 21a can be preferably used.

The positive electrode active material layer 22a may contain an adhesive resin. As the adhesive resin, for example, a non-aqueous secondary battery active material coating resin described in JP-A-2017-054703 is mixed with a small amount of an organic solvent to adjust its glass transition temperature to room temperature or lower. Also, those described as adhesives in JP-A-10-255805 can be preferably used. In addition, adhesive resin is a resin that does not solidify even if the solvent component is volatilized and dried, and has adhesiveness (the property of adhering by applying a slight pressure without using water, solvent, heat, etc.) means On the other hand, a solution-drying type electrode binder used as a binder is one that dries and solidifies by volatilizing a solvent component, thereby firmly adhering and fixing active materials to each other. Therefore, the binder (solution-drying type electrode binder) and the adhesive resin described above are different materials.

The positive electrode active material layer 22a may contain an electrolytic solution containing an electrolyte and a non-aqueous solvent. As the electrolyte, those used in known electrolytic solutions can be used. As the non-aqueous solvent, those used in known electrolytic solutions (eg, phosphate esters, nitrile compounds, mixtures thereof, etc.) can be used. For example, a mixture of ethylene carbonate (EC) and dimethyl carbonate (DMC) or a mixture of ethylene carbonate (EC) and propylene carbonate (PC) can be used.

The positive electrode active material layer 22a may contain a conductive aid. As the conductive aid, a conductive material similar to the conductive filler contained in the positive electrode current collector layer 21a can be preferably used.

Although the thickness of the positive electrode active material layer 22a is not particularly limited, it is preferably 150 to 600 μm, more preferably 200 to 450 μm, from the viewpoint of battery performance.

<Specific example of negative electrode current collector>
As the negative electrode current collector constituting the negative electrode current collector layer 21b, the same one as the positive electrode current collector can be appropriately selected and used, and can be obtained by the same method. The negative electrode current collector layer 21b is preferably a resin current collector from the viewpoint of battery characteristics and the like. Although the thickness of the negative electrode current collector layer 21b is not particularly limited, it is preferably 5 to 150 μm.

<Specific example of negative electrode active material>
The negative electrode active material layer 22b is preferably a non-bonded mixture containing a negative electrode active material. The reason why the negative electrode active material layer is preferably a non-binder and the reason why the positive electrode active material layer 22a is preferably a non-binder is the method for obtaining the negative electrode active material layer 22b which is a non-binder. , and the method for obtaining the positive electrode active material layer 22a which is a non-binder.

As the negative electrode active material, for example, a carbon-based material, a silicon-based material, a mixture thereof, or the like can be used, but the material is not particularly limited.

The negative electrode active material may be a coated negative electrode active material in which at least part of the surface is coated with a coating material containing a polymer compound. When the periphery of the negative electrode active material is covered with the coating material, the volume change of the negative electrode is moderated, and the expansion of the negative electrode can be suppressed.

As the coating material, the same coating material as that constituting the coated positive electrode active material can be suitably used.

The negative electrode active material layer 22b contains an electrolytic solution containing an electrolyte and a non-aqueous solvent. As for the composition of the electrolytic solution, an electrolytic solution similar to the electrolytic solution contained in the positive electrode active material layer 22a can be suitably used.

The negative electrode active material layer 22b may contain a conductive aid. As the conductive aid, a conductive material similar to the conductive filler contained in the positive electrode active material layer 22a can be preferably used.

The negative electrode active material layer 22b may contain an adhesive resin. As the adhesive resin, the same adhesive resin as an optional component of the positive electrode active material layer 22a can be preferably used.

Although the thickness of the negative electrode active material layer 22b is not particularly limited, it is preferably 150 to 600 μm, more preferably 200 to 450 μm, from the viewpoint of battery performance.

<Specific example of separator>
The electrolyte retained in the separator 30 includes, for example, an electrolytic solution or a gel polymer electrolyte. By using these electrolytes, the separator 30 ensures high lithium ion conductivity. Examples of the form of the separator 30 include, but are not particularly limited to, polyethylene or polypropylene porous films.

<Specific example of frame>
The material for the frame 35 is not particularly limited as long as it is a material that is durable against the electrolytic solution. For example, a polymer material is preferable, and a thermosetting polymer material is more preferable. As a material for forming the frame 35, any material having insulating properties, sealing properties (liquid-tightness), heat resistance under the battery operating temperature, and the like may be used, and a resin material is preferably employed. More specifically, examples of the frame 35 include epoxy-based resins, polyolefin-based resins, polyurethane-based resins, and polyvinylidene fluoride resins. preferable.

<Manufacturing apparatus and method for manufacturing battery electrode>
Next, a manufacturing apparatus and a method for manufacturing a battery electrode (hereinafter abbreviated as a manufacturing method) of this embodiment will be described. For example, in the battery manufacturing apparatus and manufacturing method, the positive electrode 20a and the negative electrode 20b are first manufactured. The method of manufacturing the positive electrode 20 a and the method of manufacturing the negative electrode 20 b mainly differ in the electrode active material contained in the electrode active material layer 22 . Here, as a method for manufacturing the electrode 20, a method for manufacturing the positive electrode 20a and the negative electrode 20b will be collectively described.

FIG. 2 is a schematic diagram of the manufacturing apparatus 1000. As shown in FIG. For example, the manufacturing apparatus 1000 includes a chamber 100 , a frame supply device (frame supply section) 200 , an active material supply device (active material supply section) 300 and a roll press 400 .

In addition, below, the case where a base film is the strip|belt-shaped collector 21B is demonstrated as an example. That is, hereinafter, an apparatus for supplying an active material to a current collector will be described as the battery electrode manufacturing apparatus 1000 . However, embodiments are not limited to this. For example, the base film may be a current collector, a separator, or a transfer film. Even when the base film is a separator or a film for transfer, the embodiments described below are similarly applicable.

The chamber 100 is a room whose interior can be kept under a pressure lower than the atmospheric pressure. The pressure inside the chamber 100 is reduced below atmospheric pressure by a decompression pump (not shown). The standard atmospheric pressure is approximately 1013 hPa (approximately 10 ⁵ Pa).

For example, a current collector roll 21R is arranged outside the chamber 100, and a strip-shaped current collector 21B pulled out from the current collector roll 21R is transported into the chamber 100 through a slit. The current collector 21B is the one before the current collector 21 is cut into a predetermined shape. The current collector 21B is transported along the transport direction D. As shown in FIG. For example, the current collector 21B is transported at a predetermined speed by a transport device such as a belt conveyor. Hereinafter, the direction in which the current collector 21B is conveyed will be described as the downstream side D1, and the opposite direction as the upstream side D2. The external space of the chamber 100 in which the current collector roll 21R is arranged may be at normal pressure, or may be decompressed by a chamber different from the chamber 100 .

The frame supply device 200 supplies the frame 35 to the conveyed current collector 21B. Although FIG. 2 shows the case where the frame supply device 200 is arranged inside the chamber 100 , the frame supply device 200 may be arranged outside the chamber 100 . For example, the frame supply device 200 has a robot arm, and places the pre-manufactured frame 35 at a predetermined position on the transported current collector 21B. After placing the frame 35 on the current collector 21B, the current collector 21B and the frame 35 may be compressed by a roll press so as to be sandwiched between them.

The method for manufacturing the frame 35 is not particularly limited. For example, the frame 35 can be formed into a predetermined shape by cutting a sheet or block made of a predetermined material such as a polymeric material. For example, the frame 35 is obtained by punching out a material sheet made of a predetermined material.

Further, for example, the frame body 35 can be formed into a predetermined shape by a method using a frame mold such as injection molding. For example, a mold having an internal space of a predetermined shape is prepared in advance, and the frame body 35 can be formed into a predetermined shape by performing injection molding on the mold.

Further, for example, the frame body 35 can be formed into a predetermined shape by discharging or applying a predetermined material onto the base material. For example, the frame 35 can be formed into a predetermined shape by a dispenser. That is, the frame 35 can be formed by discharging a predetermined amount of a predetermined material from a nozzle onto the substrate under the control of the dispenser. To give another example, the frame 35 can be formed by applying a predetermined material in a predetermined shape onto the base material using a coater such as a screen printer.

More specifically, the frame body 35 can be formed by discharging or applying a predetermined material onto the base material in a predetermined shape using a dispenser, a coater, or the like, and peeling it off from the base material after drying. can be done. Alternatively, the frame body 35 is formed by discharging or applying a predetermined material such as a two-liquid curing resin or a UV curing resin onto the base material using a dispenser, a coater, or the like so as to form a predetermined shape, and peeling off from the base material after curing. It can be formed by letting

In addition, the frame body 35 can be formed into a predetermined shape by various methods. For example, the frame 35 may be formed into a predetermined shape by assembling sheets or blocks made of a predetermined material so as to have a predetermined shape. Alternatively, for example, the frame body 35 may be formed into a predetermined shape by arranging a sheet made of a predetermined material in the longitudinal direction of the base material and ejecting or applying the material in the vertical direction. Alternatively, the frame 35 can be manufactured by any type of 3D printer.

In addition, in FIG. 2, the prefabricated frame 35 is described as being placed on the current collector 21B, but the embodiment is not limited to this. For example, the frame 35 may be manufactured on the current collector 21B. As an example, the current collector 21B is used as a base material, and a predetermined material is discharged or applied in a predetermined shape onto the current collector 21B using a dispenser, a coater, or the like, thereby forming the frame 35 on the current collector 21B. can be formed.

As shown in FIG. 2, the active material supply device 300 supplies the powdered active material 22c onto the current collector 21B that is transported within the chamber 100. As shown in FIG. The active material 22c means a plurality of electrode granulated particles containing an electrode active material and a conductive aid.

For example, as shown in FIG. 3, the active material supply device 300 includes a screw conveyor 310, an input chute 320, an ejection chute 330, a shutter unit 340, an ultrasonic vibrator 350, and a leveling brush 360. Prepare. Note that FIG. 3 is merely an example, and arbitrary modifications are possible as long as the active material 22c can be supplied to the current collector 21B.

A hopper 370 is configured with the input chute 320 and the discharge chute 330 . A hopper 370 is positioned within the chamber 100 . The frame body supply device 200 is arranged on the upstream side D<b>2 of the hopper 370 . That is, after supplying the frame 35 onto the current collector 21B, the active material 22c is supplied onto the current collector 21B. The screw conveyor 310 conveys the active material 22c to the input chute 320. As shown in FIG. One end of the screw conveyor 310 is connected to a reservoir or the like (not shown) of the active material 22c arranged outside the chamber 100 . The other end of screw conveyor 310 is connected to input chute 320 .

The input chute 320 drops the active material 22 c conveyed from the screw conveyor 310 into the discharge chute 330 . That is, the hopper 370 is provided within the chamber 100 and accommodates the active material 22c therein. The discharge chute 330 has a tubular shape extending in the vertical direction. An opening 331 is formed at the lower end of the discharge chute 330 . The discharge chute 330 is arranged below the input chute 320 . That is, an opening 331 is formed at the lower end of the hopper 370 . The opening 331 is formed along the horizontal plane. The opening 331 supplies the active material 22c onto (toward the current collector 21B) the current collector 21B placed in the chamber 100. FIG. The active material 22 c conveyed from the screw conveyor 310 to the input chute 320 freely falls into the discharge chute 330 . Inside the hopper 370, the active material 22c is accommodated. When the active material 22c is lumped on the screw conveyor 310, the active material supply device 300 may include a crusher for pulverizing the lumped active material 22c.

As shown in FIGS. 3 and 4, the shutter unit 340 includes a first shutter door (shutter) 341, a second shutter door (shutter) 342, a first opening/closing mechanism (opening/closing mechanism) 343, and a second opening/closing mechanism. (opening/closing mechanism) 344; That is, the active material supply device 300 has two shutter doors 341 and 342 as shutters. The shutter doors 341 and 342 are each flat. The shutter doors 341 and 342 are arranged along the horizontal plane.

As shown in FIGS. 4 and 5, the first shutter door 341 is a flat plate having a rectangular shape in plan view. One edge of the first shutter door 341 is formed with an inclined surface 341a. The inclined surface 341 a is formed over the entire width direction E of the first shutter door 341 . Similarly, the second shutter door 342 is formed with an inclined surface 342a. 5 is a cross-sectional view taken along line A1-A1 in FIG.

The second shutter door 342 is arranged on the downstream side D1 of the first shutter door 341, the inclined surface 341a is arranged at the end of the first shutter door (shutter) 341 on the downstream side D, and the inclined surface 342a It is arranged at the end of the second shutter door 342 on the upstream side D2. That is, the inclined surface 341a of the first shutter door 341 and the inclined surface 342a of the second shutter door 342 are opposed to each other in the transport direction D. As shown in FIG.

Shutter doors 341 and 342 open and close opening 331 of discharge chute 330 . Here, that the shutter doors 341 and 342 open the opening 331 means that the shutter doors 341 and 342 do not cover at least part of the opening 331 . That the shutter doors 341 and 342 close the opening 331 means that the shutter doors 341 and 342 are in a state of closing the opening 331 .

The first opening/closing mechanism 343 has a motor 345 and an arm 346 . In the motor 345 , the rotary shaft 348 rotates around the axis of the rotary shaft 348 with respect to the main body 347 . A male screw is formed on the outer peripheral surface of the rotating shaft 348 . The motor 345 is arranged so that the rotary shaft 348 extends in the transport direction D. As shown in FIG. The main body 347 is fixed to the floor of the chamber 100 or the like. A female screw (not shown) is formed at the first end of the arm 346 . This female thread fits into the male thread of the rotating shaft 348 of the motor 345 . A second end opposite to the first end of the arm 346 is fixed to the upper surface of the first shutter door 341 .

In the first shutter door 341 and the first opening/closing mechanism 343 configured as described above, for example, when a voltage is applied to the motor 345 in a predetermined direction, the rotating shaft 348 rotates in a predetermined direction. As a result, the first shutter door 341 connected to the rotary shaft 348 via the arm 346 moves downstream D1. Similarly, when a voltage is applied to the motor 345 in the direction opposite to the predetermined direction, the rotation shaft 348 rotates in the direction opposite to the predetermined direction. As a result, the first shutter door 341 moves to the upstream side D2.

Thus, the first opening/closing mechanism 343 moves the first shutter door 341 in the transport direction D. As shown in FIG. The second opening/closing mechanism 344 is configured in the same manner as the first opening/closing mechanism 343 and moves the second shutter door 342 in the transport direction D. As shown in FIG. The first shutter door 341 and the second shutter door 342 can be moved independently of each other by the first opening/closing mechanism 343 and the second opening/closing mechanism 344 .

As shown in FIG. 3, the ultrasonic vibrator 350 is provided on the outer wall below the discharge chute 330 . In other words, the ultrasonic vibrator 350 is provided outside the portion of the discharge chute 330 where the active material 22c is deposited. The ultrasonic vibrator 350 vibrates the active material 22c deposited under the discharge chute 330 by generating ultrasonic waves. The ultrasonic vibrator 350 serves to even out the active material 22c deposited in the discharge chute 330. As shown in FIG.

The leveling brush 360 is moved along the horizontal plane by a motor (not shown). The leveling brush 360 serves to level the upper surface of the active material 22c deposited in the discharge chute 330. As shown in FIG. As described above, in this embodiment, a portion of the active material supply device 300 having the opening 331 is arranged inside the chamber 100 . Note that at least the opening 331 of the active material supply device 300 is arranged inside the chamber 100 . The entire active material supply device 300 may be arranged within the chamber 100 .

Active material supply device 300 is controlled such that shutter doors 341 and 342 are opened when internal space 35 a of frame 35 is positioned below opening 331 . Thereby, the active material 22c supplied from the opening 331 is arranged on the current collector 21B and in the internal space 35a of the frame 35 with the first thickness. Thus, the active material supply device 300 supplies the active material 22c into the frame 35 provided on the current collector 21B. For example, the first thickness is thicker than the thickness of the frame 35 . In order to adjust the opening timing of the shutter doors 341 and 342 when the internal space 35a of the frame 35 is positioned below the opening 331, the conveying speed, the length of the frame 35 in the conveying direction D, etc. are considered. A known time control or the like is used. Note that the manufacturing apparatus 1000 may include a position sensor that detects the position of the frame 35 in the transport direction D. FIG. Then, based on the position of the frame body 35 detected by the position sensor, the control unit (not shown) may adjust the opening timing of the shutter doors 341 and 342 by the opening/closing mechanisms 343 and 344 . The opening/closing control of the shutter doors 341 and 342 will be described later in detail.

The roll press 400 compresses the active material 22c supplied onto the current collector 21B. The roll press 400 has a pair of compression rollers 401 and a drive section 402 . Between the pair of compression rollers 401, current collector 21B, frame 35, and active material 22c are sandwiched. Roll press 400 compresses first thickness active material 22c to a second thickness that is less than the first thickness. For example, the second thickness is the thickness of the frame 35 . Note that the configuration of the roll press 400 is not limited to these.

The control unit has a CPU (Central Processing Unit) (not shown) and a memory. The memory stores a control program for operating the CPU, various data, and the like. The controller is connected to the first opening/closing mechanism 343, the second opening/closing mechanism, and the like. The controller controls the first opening/closing mechanism 343, the second opening/closing mechanism 344, and the like. The controller supplies the active material 22 c to the internal space 35 a of the frame 35 by the first opening/closing mechanism 343 and the second opening/closing mechanism 344 .

Next, opening/closing control of the shutter doors 341 and 342 will be described. Note that the hopper 370 is fixed within the chamber 100 in this embodiment. The controller moves the shutter doors 341 and 342 by the opening/closing mechanisms 343 and 344 so that the internal space 35a of the frame 35 is positioned below the portion of the opening 331 that is not closed by the shutter doors 341 and 342. . In other words, the controller opens the opening 331 by the shutter doors 341 and 342 only when the internal space 35 a of the frame 35 is positioned below the opening 331 . A specific description will be given below. However, the inclined surfaces 341 a and 342 a of the shutter doors 341 and 342 are not related to the effect of opening and closing the opening 331 . That is, the shutter doors 341 and 342 are not formed with the inclined surfaces 341a and 342a.

As shown in FIG. 5 , the controller previously arranges the opening/closing mechanisms 343 and 344 so that only the second shutter door 342 closes the opening 331 . That is, in the transport direction D, the end of the second shutter door 342 on the upstream side D<b>2 is arranged to match the end of the opening 331 on the upstream side D<b>2 . The first shutter door 341 is arranged on the upstream side D<b>2 of the second shutter door 342 so as to face the second shutter door 342 . The current collector 21B and the frame 35 are conveyed downstream D1 as indicated by an arrow B1. Next, the control unit performs an active material supplying step and an active material stopping step. In the active material supplying step, the control unit causes the second opening/closing mechanism 344 to move the second shutter door 342 to the downstream side D<b>1 in synchronization with the movement of the frame 35 to open the opening 331 . In other words, the movement of the frame 35 and the movement of the second shutter door 342 are temporally matched to open the opening 331 .

More specifically, in the transport direction D, the inner edge 35b on the downstream side D1 of the frame 35 to which the active material 22c is to be supplied (hereinafter referred to as frame 35A) is located upstream of the opening 331 of the active material supply device 300. When the end of the side D2 is reached, the second opening/closing mechanism 344 moves the second shutter door 342 to the downstream side D1. At this time, as shown in FIG. 6, the second shutter door 342 is opened so that the inner edge 35b of the frame 35A on the downstream side D1 and the end of the second shutter door 342 on the upstream side D2 are aligned in the transport direction D. Move downstream D1 at a predetermined speed. That is, the second shutter door 342 is moved in accordance with the movement of the frame 35A. 6 and 7, at this time, the active material 22c in the discharge chute 330 is supplied through the opening 331 to the vicinity of the inner edge 35b in the inner space 35a of the frame 35. As shown in FIGS. As shown in FIG. 8, when the end of the upstream side D2 of the second shutter door 342 reaches the end of the opening 331 on the downstream side D1 in the transport direction D, the control section causes the second opening/closing mechanism 344 to open the second shutter door 342 to stop

Here, as shown in FIGS. 5, 6, 8, etc., the processing portion 330a is formed on the lower surface of the hopper 370. As shown in FIG. That is, the processing portion 330 a is formed on the first opposing surface of the hopper 370 that faces the second shutter door 342 . The processing part 330a is a smoothing layer formed on the lower surface of the hopper 370, for example. Further, a processed portion 342b is formed on the upper surface of the second shutter door 342. As shown in FIG. That is, a processed portion 342 b is formed on the second facing surface of the second shutter door 342 that faces the hopper 370 . The processing portion 342b is a smoothing layer formed on the upper surface of the second shutter door 342, for example. The processed portion 330a and the processed portion 342b are, for example, ceramic coating or fluorine coating, such as Teflon (registered trademark) processing, which is a smoothing layer.

By forming the processing portion 330a and the processing portion 342b, the second shutter door 342 can be moved smoothly with respect to the hopper 370 as shown in FIGS. For example, when the second shutter door 342 slides on the hopper 370, the sliding surface can be made slippery. In addition, when the processed portion 330a and the processed portion 342b are not formed and unevenness exists on the lower surface of the hopper 370 or the upper surface of the second shutter door 342, the active material 22c enters the recessed portion and the second When the shutter door 342 is out of the hopper 370 , the active material 22 c may also be out of the hopper 370 . That is, the active material 22c may scatter inside the chamber 100. FIG. On the other hand, by forming the processed portion 330a and the processed portion 342b, scattering of the active material 22c can be suppressed.

When the hopper 370 finishes supplying a predetermined amount of the active material 22c into the internal space 35a of the frame 35, the active material supplying step is terminated, and the active material stopping step is started. In the active material stopping step, the control unit causes the first opening/closing mechanism 343 to move the first shutter door 341 to the downstream side D<b>1 to close the opening 331 .

More specifically, as shown in FIG. 9, when the inner edge 35c of the frame body 35A on the upstream side D2 reaches the end of the first shutter door 341 on the downstream side D1 in the conveying direction D, the controller operates the first opening/closing mechanism. 343 moves the first shutter door 341 to the downstream side D1. At this time, as shown in FIG. 10, the first shutter door 341 is opened so that the inner edge 35c of the frame 35A on the upstream side D2 and the end of the first shutter door 341 on the downstream side D1 are aligned in the transport direction D. Move downstream D1 at a predetermined speed. That is, the first shutter door 341 is moved in accordance with the movement of the frame 35A. When the downstream D1 end of the first shutter door 341 reaches the downstream D1 end of the opening 331 in the transport direction D, the controller causes the first opening/closing mechanism 343 to stop the first shutter door 341 . At this time, the first shutter door 341 is arranged so as to face the second shutter door 342 .

Next, as shown in FIG. 5, the control unit causes the opening/closing mechanisms 343 and 344 to integrally move the shutter doors 341 and 342 to the upstream side D2 and wait. With this, the active material stopping step is completed. The frame 35A to which the active material 22c is to be supplied is changed to the frame 35 on the upstream side D2, and the active material supply process and the active material stop process are repeated for the changed frame 35A. Thus, in the active material supply method of the present embodiment, the active material can be supplied by opening and closing the opening 331 of the hopper 370 with the shutter doors 341 and 342 .

Here, as shown in FIGS. 9, 10, 5, etc., the upper surface of the first shutter door 341 is formed with a processed portion 341b. That is, a processed portion 341b is formed on the second facing surface of the first shutter door 341 facing the hopper 370 . The processing portion 341b is a smoothing layer formed on the upper surface of the first shutter door 341, for example. Further, as described above, the processing portion 330a is formed on the lower surface of the hopper 370. As shown in FIG. That is, the processing portion 330 a is formed on the first facing surface of the hopper 370 that faces the first shutter door 341 . The processed portion 330a and the processed portion 341b are, for example, ceramic coating or fluorine coating, such as Teflon (registered trademark) processing, which is a smoothing layer.

By forming the processing section 330a and the processing section 341b, the first shutter door 341 moves smoothly with respect to the hopper 370 as shown in FIGS. 9, 10, 5, etc. can be done. For example, when the first shutter door 341 slides on the hopper 370, the sliding surface can be made slippery. In addition, when the processed portion 330a and the processed portion 341b are not formed and unevenness exists on the lower surface of the hopper 370 or the upper surface of the first shutter door 341, the active material 22c enters the recessed portion and the first When the shutter door 341 is out of the hopper 370, the active material 22c may be out of the hopper 370 as well. That is, the active material 22c may scatter inside the chamber 100. FIG. In contrast, by forming the processed portion 330a and the processed portion 341b, it is possible to suppress the scattering of the active material 22c.

5 to 10, the processing section 330a, the processing section 341b, and the processing section 342b have been described. Here, in addition to or instead of these processed portions, a processed portion may be formed on the lower surface of the second shutter door 342 . That is, the processed portion may be formed on the third facing surface facing the conveyed current collector 21B on the second shutter door 342 .

For example, as shown in FIG. 11, a processed portion 342c may be formed on the lower surface of the second shutter door 342. As shown in FIG. That is, the processed portion 342c may be formed on the third facing surface of the second shutter door 342 facing the conveyed current collector 21B. The processed portion 342c is a smoothing layer formed on the lower surface of the second shutter door 342, for example. The processed portion 342c is, for example, a smoothing layer by ceramic coating or fluorine coating, such as Teflon (registered trademark) processing.

As shown in FIG. 11, the processing portion 342c contacts the active material 22c supplied onto the current collector 21B. Here, when the processed portion 342c is a smoothing layer, the active material 22c can be flattened to a predetermined thickness by contacting the processed portion 342c. That is, by forming the processed portion 342c, which is a smoothing layer, the second shutter door 342 can function as a squeegee.

As another example, a roller 342d may be formed on the lower surface of the second shutter door 342, as shown in FIG. That is, a roller 342d may be formed as a processing portion on the third facing surface of the second shutter door 342 facing the conveyed current collector 21B. As shown in FIG. 12, the roller 342d compresses the active material 22c supplied onto the conveyed current collector 21B. That is, the roller 342d prepresses the active material 22c supplied onto the current collector 21B prior to compression by the roll press 400 described above.

To give another example, as shown in FIG. 13, the lower surface of the second shutter door 342 may be formed with an inclined surface 342e. That is, an inclined surface 342e may be formed as a processed portion on the third facing surface of the second shutter door 342 facing the conveyed current collector 21B. As shown in FIG. 13, the inclined surface 342e compresses the active material 22c supplied onto the conveyed current collector 21B. That is, the inclined surface 342e prepresses the active material 22c supplied onto the current collector 21B prior to compression by the roll press 400 described above.

By compressing the active material 22c with the roller 342d or the inclined surface 342e, the active material 22c can be flattened to a predetermined thickness. Further, by slightly pressing the active material 22c, it is possible to suppress scattering of the active material 22c until it is compressed by the roll press 400. FIG.

After the various steps described above, the electrode 20 is manufactured by appropriately cutting out the current collector 31 from the strip-shaped current collector 21B. Also, the unit cell 10 is manufactured by stacking a pair of electrodes 20 (that is, the positive electrode 20a and the negative electrode 20b) so as to face each other with the separator 30 interposed therebetween. Also, a battery is manufactured by stacking a plurality of unit cells 10 in the thickness direction and sealing the plurality of unit cells 10 with an outer package. Expansion of the air contained in the active material 22c is also suppressed when sealing with the exterior body.

As described above, the active material supply device 300 of the present embodiment supplies the powdery active material 22c on the current collector 21B that is transported in the transport direction D in the chamber 100 whose interior is evacuated below atmospheric pressure. is provided in the chamber 100 and is provided at a position between the hopper 370 containing the active material 22c and the current collector 21B to be transported. , a first shutter door 341 and a second shutter door 342 for opening and closing an opening 331 for supplying the active material 22c toward the current collector 21B. , the second facing surface facing the hopper 370 in the first shutter door 341 and the second shutter door 342, and the current collector conveyed in the first shutter door 341 and the second shutter door 342 A processed portion is formed on at least one of the third facing surfaces facing 21B. As a result, the desired position on the conveyed current collector can be suppressed while suppressing the deterioration of the uniformity of the active material layer formed on the current collector when manufacturing the electrode using the powdery active material. It is possible to stably supply the active material to and improve the production efficiency of the battery electrode.

For example, smoothing the first shutter door 341 and the second shutter door 342 with respect to the hopper 370 is performed by forming a smoothing layer such as the processing portion 341b and the processing portion 342b on the first opposing surface and the second opposing surface. In addition, it is possible to suppress the scattering of the active material 22c. Further, for example, by forming a smoothing treatment layer such as the processing treatment portion 342c on the third facing surface, the second shutter door 342 can be given a function as a squeegee. Further, for example, by forming a roller 342d or an inclined surface 342e on the third facing surface, the second shutter door 342 can function as a squeegee, and the active material 22c can be slightly compacted to suppress scattering. can be done.

Active material supply device 300 supplies active material 22c onto current collector 21B in chamber 100 whose interior is evacuated below atmospheric pressure. Thereby, the active material supply device 300 can make it difficult for air to be included in the active material 22c. Therefore, when the active material 22c is compressed, air is suppressed from being included in the active material 22c. It is possible to avoid the formation of unevenness on the surface.

(Second embodiment)
In the first embodiment, the case where the opening 331 is opened and closed by the first shutter door 341 and the second shutter door 342 has been described. That is, in the first embodiment, the case where the opening 331 is opened and closed by a plurality of shutters has been described. On the other hand, in the second embodiment, the case where the first shutter door 341 is omitted and the opening 331 is opened and closed by the second shutter door 342 will be described. In the following, the same parts as in the first embodiment are denoted by the same reference numerals, and descriptions thereof are omitted, and only different points will be described.

As shown in FIG. 14, the active material supply device 1300 in the manufacturing apparatus 2000 of the present embodiment does not include the first shutter door 341 and the first opening/closing mechanism 343 in contrast to the active material supply device 300 of the first embodiment. , a transport mechanism (not shown). That is, the active material supply device 1300 has one second shutter door 342 as a shutter. For example, the transport mechanism has linear guides, motors, and the like. The transport mechanism transports the hopper 370 in the transport direction D. As shown in FIG. In this embodiment, the transport mechanism is connected to the controller. The controller controls the transport mechanism. An engaging portion 332 protruding downward is provided at the upstream side D<b>2 portion of the periphery of the opening 331 of the discharge chute 330 .

Next, opening/closing control of the second shutter door 342 will be described. As shown in FIG. 14 , the control unit previously arranges the second shutter door 342 to close the opening 331 by the second opening/closing mechanism 344 . At this time, the second shutter door 342 is abutted against the locking portion 332 . The controller arranges the hopper 370 at a predetermined position in the transport direction D in the chamber 100 by the transport mechanism in advance. Next, the control unit performs an active material supplying step and an active material stopping step. In the active material supplying step, the control unit causes the second opening/closing mechanism 344 to move the second shutter door 342 to the downstream side D<b>1 in synchronization with the movement of the frame 35 to open the opening 331 .

More specifically, when the inner edge 35b on the downstream side D1 of the frame 35A in the transport direction D coincides with the end on the upstream side D2 of the opening 331 of the active material supply device 1300, the second opening/closing mechanism 344 opens the second The shutter door 342 is moved downstream D1. At this time, as shown in FIG. 15, the second shutter door 342 is opened so that the inner edge 35b of the frame 35A on the downstream side D1 and the end of the second shutter door 342 on the upstream side D2 are aligned in the transport direction D. Move downstream D1 at a predetermined speed. At this time, the active material 22c in the discharge chute 330 is supplied near the inner edge 35b in the inner space 35a of the frame 35 through the opening 331. As shown in FIG. As shown in FIG. 16, when the end of the upstream side D2 of the second shutter door 342 reaches the end of the opening 331 on the downstream side D1 in the transport direction D, the control unit causes the second opening/closing mechanism 344 to open the second shutter door 342 to stop

When the hopper 370 finishes supplying a predetermined amount of the active material 22c into the internal space 35a of the frame 35, the active material supplying step is terminated, and the active material stopping step is started. In the active material stopping step, the control unit causes the second opening/closing mechanism 344 to move the second shutter door 342 to the upstream side D<b>2 to close the opening 331 . More specifically, as shown in FIG. 17, when the inner edge 35c of the upstream side D2 of the frame 35A reaches the end of the opening 331 on the upstream side D2 in the conveying direction D, the control unit causes the second opening/closing mechanism 344 to open the second opening. The second shutter door 342 is moved to the upstream side D2. At this time, the controller causes the transport mechanism to transport the hopper 370 to the downstream side D1 (transport direction D) as indicated by the arrow B2 in synchronization with the movement of the frame 35 . More specifically, in the transport direction D, the hopper 370 is moved downstream D1 at a predetermined speed so that the inner edge 35c of the frame 35A on the upstream side D2 and the edge of the opening 331 on the upstream side D2 are aligned. At this time, the current collector 21B, the frame 35, and the hopper 370 move downstream D1 at a predetermined speed, and the second shutter door 342 moves upstream D2. Since the hopper 370 and the second shutter door 342 are moved to the opposite sides so as to approach each other, the opening 331 of the hopper 370 can be closed in a shorter time.

As shown in FIG. 18, when the second shutter door 342 hits the locking portion 332, the control unit causes the second opening/closing mechanism 344 and the transport mechanism to open the second shutter door 342 and the hopper 370 as shown in FIG. They are moved together to the upstream side D2. The hopper 370 is moved to the predetermined position and waited. With this, the active material stopping step is completed. The frame 35A to which the active material 22c is to be supplied is changed to the frame 35 on the upstream side D2, and the active material supply process and the active material stop process are repeated for the changed frame 35A.

Here, as shown in FIGS. 14 to 18, the processing portion 330a is formed on the lower surface of the hopper 370. As shown in FIGS. That is, the processing portion 330 a is formed on the first opposing surface of the hopper 370 that faces the second shutter door 342 . Further, a processed portion 342b is formed on the upper surface of the second shutter door 342. As shown in FIG. That is, a processed portion 342 b is formed on the second facing surface of the second shutter door 342 that faces the hopper 370 . The processed portion 330a and the processed portion 342b are, for example, ceramic coating or fluorine coating, such as Teflon (registered trademark) processing, which is a smoothing layer. By forming the processing section 330a and the processing section 342b, the second shutter door 342 can move smoothly with respect to the hopper 370 as shown in FIGS. Scattering of the active material 22c can be suppressed.

Although omitted in FIGS. 14 to 18, a processed portion may be formed on the lower surface of the second shutter door 342. FIG. That is, the processed portion may be formed on the third facing surface facing the conveyed current collector 21B on the second shutter door 342 . For example, the processing portion 342c shown in FIG. 11 may be formed on the lower surface of the second shutter door 342 so that the second shutter door 342 functions as a squeegee. Further, for example, the roller 342d shown in FIG. 12 and the inclined surface 342e shown in FIG. 22c may be slightly compressed to suppress scattering.

In addition, in the second embodiment, the active material supply device 1300 does not have to have a transport mechanism. In this case, the hopper 370 is fixed within the chamber 100 and does not move during the active material stopping process. Also, the active material supply device 1300 may include a first shutter door 341 and a first opening/closing mechanism 343 instead of the second shutter door 342 and the second opening/closing mechanism 344 . In this case, the active material supply device 1300 opens the opening 331 by moving the first shutter door 341 to the upstream side D2 from the state where the opening 331 is closed by the first shutter door 341 . Then, the first shutter door 341 is moved to the downstream side D1 to close the opening 331 .

As described above, the first embodiment and the second embodiment of the present invention have been described in detail with reference to the drawings. change, combination, deletion, etc. of Furthermore, it goes without saying that the configurations shown in the respective embodiments can be used in combination as appropriate. For example, in the first embodiment and the second embodiment, the frame supply device 200 may be arranged downstream D1 of the hopper 370 . That is, the frame 35 may be supplied onto the current collector 21B after the active material 22c is supplied onto the current collector 21B. In this case, the control unit supplies the frame 35 onto the current collector 21B so that the active material 22c supplied onto the current collector 21B enters the internal space 35a of the frame 35 . By configuring as in this modification, the frame 35 can be supplied onto the current collector 21B after the active material 22c is supplied onto the current collector 21B. Alternatively, a mask may be formed on the base film before the frame 35 is supplied to the current collector 21B, and the frame 35 may be supplied to the position of the mask at any timing thereafter.

The active material supply device 300 may include a controller that controls the opening/closing mechanisms 343 and 344 . The manufacturing apparatuses 1000 and 2000 do not have to include the frame supply device 200 . Furthermore, the active material supply devices 300 and 1300 may not have the opening/closing mechanisms 343 and 344 .

21B current collector 22c active material 35 frame 100 chamber 300, 1300 active material supply device 320 input chute 330 discharge chute 330a processing unit 331 opening 341 first shutter door (shutter)
341b Processing unit 342 Second shutter door (shutter)
342b processing unit 342c processing unit 342d roller 342e inclined surface 343 first opening/closing mechanism (opening/closing mechanism)
344 Second opening/closing mechanism (opening/closing mechanism)
370 Hopper 400 Roll press 1000, 2000 Manufacturing equipment (manufacturing equipment for battery electrodes)
D Conveying direction D1 Downstream side D2 Upstream side

Claims (9)

An active material supply device for supplying a powdery active material onto a base film,
a hopper containing the active material therein;
provided at a position between the hopper and the substrate film being transported in the transport direction in a chamber whose interior is evacuated below atmospheric pressure, and supplying the active material toward the substrate film and a shutter that opens and closes an opening for
At least one of a first facing surface facing the shutter in the hopper, a second facing surface facing the hopper in the shutter, and a third facing surface facing the substrate film conveyed in the shutter An active material supply device in which a processing unit is formed. 2. The active material supply device according to claim 1, wherein said processed portion is a smoothing layer and is formed on at least one of said first opposing surface and said second opposing surface. 3. The active material supply device according to claim 2, wherein said first opposing surface and said second opposing surface are sliding surfaces between said hopper and said shutter. 4. The active material supplying device according to claim 2, wherein said processed part is a smoothing layer formed by ceramic coating or Teflon (registered trademark) treatment. The active material supply device according to any one of claims 1 to 4, wherein the processed portion is a smoothing processed layer and is formed at least on the third opposing surface. Any one of claims 1 to 5, wherein the processing unit is a roller or an inclined surface for compressing the active material supplied onto the conveyed base film, and is provided at least on the third opposing surface. 1. The active material supply device according to claim 1. an opening and closing mechanism for moving the shutter in the conveying direction of the base film;
The active material supply device according to any one of claims 1 to 6, further comprising a control section that controls the opening/closing mechanism. an active material supply device according to claim 7;
the chamber;
An apparatus for manufacturing a battery electrode, comprising: a frame supply unit disposed in the chamber and supplying a frame onto the base film. In a hopper that is provided in a chamber whose interior is evacuated below atmospheric pressure and that contains a powdery active material, there is a gap between the hopper and the base film that is transported in the transport direction in the chamber. at least one of a first facing surface facing a shutter provided at a position, a second facing surface facing the hopper in the shutter, and a third facing surface facing the substrate film conveyed in the shutter By controlling the operation of the hopper in which the processing part is formed and the shutter, the opening for supplying the active material toward the base film is opened and closed by the shutter, and the base material is conveyed. A method for supplying an active material, comprising supplying the active material onto a film.

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