WO2023190939A1

WO2023190939A1 - Battery electrode manufacturing device and battery electrode manufacturing method

Info

Publication number: WO2023190939A1
Application number: PCT/JP2023/013318
Authority: WO
Inventors: 英明堀江; 健一郎榎; 勇輔中嶋; 浩太郎那須
Original assignee: Ａｐｂ株式会社
Priority date: 2022-03-30
Filing date: 2023-03-30
Publication date: 2023-10-05
Also published as: JP2023148643A

Abstract

Provided is a battery electrode manufacturing device (1000) comprising: a hopper (611) which has an accommodation space in the interior thereof and comprises at least first openings (611a, 611b) that receive supply of a coating active material into the accommodation space, second openings (611c, 611d) that receive supply of an auxiliary material into the accommodation space, and a third opening (611e) that discharges the substance in the accommodation space; first supply parts (612a, 612b) that supply the coating active material from the first openings into the accommodation space; second supply parts (614a, 614b) that supply the auxiliary material from the second openings into the accommodation space; and pushout parts (616a, 616b) that push the substance in the accommodation space out while kneading the same from the first openings toward the second openings, and that pushes said substance out while kneading the same from the second openings toward the third opening.

Description

Battery electrode manufacturing device and battery electrode manufacturing method

The present invention relates to a battery electrode manufacturing apparatus and a battery electrode manufacturing method.

Lithium-ion batteries are high-capacity secondary batteries that have been used for a variety of purposes in recent years. The electrode of a lithium ion battery is composed of an active material layer, a current collector layer, a separator, a frame that encloses the active material layer, and the like (see, for example, Patent Document 1). The active material layer in a lithium ion battery can be formed, for example, by supplying an electrode composition to a strip-shaped base film and compressing it using a roll press or the like.

Here, the electrode composition is produced by mixing auxiliary materials such as a conductive aid and an electrolyte with a coated active material material containing active material particles. For example, first, a resin solution or gel pellets are added to active material particles and mixed with a mixer to produce a work-in-progress product. Thereafter, the work-in-progress is put into another mixer and mixed with the auxiliary materials to produce the electrode composition.

Patent No. 6633866

The method using the batch type mixer described above involves many steps and cannot be said to have high production efficiency.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a battery electrode manufacturing apparatus and a battery electrode manufacturing method that can continuously produce an electrode composition.

In order to achieve the above object, a battery electrode manufacturing apparatus according to the present invention includes a hopper, a first supply section, a second supply section, and an extrusion section. The hopper has an accommodation space therein, and has a first opening through which the coating active material is supplied to the accommodation space, a second opening through which the auxiliary material is supplied to the accommodation space, and a substance in the accommodation space. and a third opening for discharging. The first supply unit supplies the covering active material to the housing space from the first opening. The second supply unit supplies the auxiliary material to the accommodation space from the second opening. The extrusion unit kneads and extrudes the substance in the accommodation space from the first opening toward the second opening, and further extrudes the substance from the second opening toward the third opening while kneading.

According to the battery electrode manufacturing apparatus and battery electrode manufacturing method of the present invention, an electrode composition can be continuously produced.

FIG. 1 is a schematic cross-sectional view of a single cell of a battery manufactured using the battery electrode manufacturing apparatus of the embodiment. FIG. 2 is a schematic diagram of a battery electrode manufacturing apparatus according to an embodiment. FIG. 3 is a diagram showing an electrode composition generating apparatus according to an embodiment. FIG. 4 is a diagram showing an electrode composition production device according to an embodiment. FIG. 5 is a diagram showing an electrode composition production device according to an embodiment. FIG. 6 is a diagram showing an electrode composition production device according to an embodiment. FIG. 7 is a diagram showing an electrode composition production device according to an embodiment. FIG. 8 is a diagram showing an electrode composition generating apparatus according to an embodiment. FIG. 9 is a diagram showing an electrode composition production device according to an embodiment.

(Embodiment)
Embodiments to which the present invention is applied will be described below with reference to the drawings. Note that the drawings used in the following explanations may show characteristic parts enlarged for convenience in order to emphasize them, and the dimensional ratios of each component may not be the same as in reality. do not have. Further, for the same purpose, some parts may be omitted from illustration.

<Assembled battery (secondary battery)>
The battery electrode manufacturing apparatus and battery electrode manufacturing method of the embodiments are applied, for example, to manufacturing lithium ion batteries. A lithium-ion battery is an assembled battery that is made into a module by combining multiple lithium-ion single cells (also referred to as single cells or battery cells), or a battery pack that is made by combining multiple such assembled batteries to adjust the voltage and capacity. used in form. Although an example of a lithium ion secondary battery is shown below, the type of secondary battery according to the present invention is not limited to a lithium ion secondary battery, and includes other secondary batteries.

The lithium ion battery in this specification refers to a secondary battery that uses lithium ions as charge carriers and is charged and discharged by movement of lithium ions between positive and negative electrodes. The lithium ion battery (secondary battery) includes a battery using a liquid material as an electrolyte, and a battery using a solid material as an electrolyte (so-called all-solid-state battery). In addition, the lithium ion battery in this embodiment includes a battery having a metal foil (metal current collector foil) as a current collector, and instead of the metal foil, the lithium ion battery includes a so-called resin current collector made of resin to which a conductive material is added. Including a battery with a body. When the resin current collector is used as a resin current collector for a bipolar electrode, which will be described later, a positive electrode is formed on one surface of the resin current collector, and a negative electrode is formed on the other surface to form a bipolar electrode. It may be composed of Note that the lithium ion battery in this embodiment includes one in which an electrode is formed by applying a positive electrode or negative electrode active material or the like to a positive electrode or negative electrode current collector using a binder, and in the case of a bipolar type battery, is a bipolar electrode that has a positive electrode layer by applying a positive active material etc. using a binder to one side of the current collector, and a negative electrode layer by applying a negative active material etc. using a binder to the opposite side. Including those made up of.

The method of stacking the assembled battery is arbitrary. As an example of a stacking method, a single cell having a positive electrode resin current collector on the first surface and a negative electrode resin current collector on the second surface is stacked on the first surface (positive electrode side) and the first surface (positive electrode side) of a pair of adjacent single cells. It may be a stacked battery in which a plurality of batteries are stacked in series so that the two sides (negative electrode side) are adjacent to each other. As another example, a single cell in which a positive electrode layer is provided on one side of a single resin current collector and a negative electrode layer is provided on the other side of the resin current collector can be used as a stacked battery in which multiple cells are stacked with an electrolyte layer interposed in between. good.

<Single cell (battery cell)>
FIG. 1 is a schematic cross-sectional view of a single cell 10. It is possible to produce the above assembled battery by combining a plurality of single cells 10. For example, the single cell 10 includes a positive electrode 20a and a negative electrode 20b as two electrodes 20 (battery electrodes), and a separator 30.

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

The separator 30 holds an electrolyte. Thereby, 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, and prevents them from coming into contact with each other. Thereby, the separator 30 functions as a partition between the positive electrode 20a and the negative electrode 20b.

Examples of the electrolyte held in the separator 30 include an electrolytic solution or a gel polymer electrolyte. By using these electrolytes, high lithium ion conductivity is ensured. Examples of the form of the separator include a porous sheet separator made of a polymer or fiber that absorbs and retains the electrolyte, a nonwoven fabric separator, and the like.

The positive electrode 20a and the negative electrode 20b each include 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 the electrode active material layers 22 of the positive electrode 20a and the negative electrode 20b are to be distinguished from each other, they will be 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 constituting the positive electrode current collector layer 21a, a current collector used in a known lithium ion cell can be used, for example, a current collector made of a known metal current collector, a conductive material, and a resin. (Resin current collectors described in JP 2012-150905 A, WO 2015/005116, etc.) can be used. The positive electrode current collector constituting the positive electrode current collector layer 21a is preferably a resin current collector from the viewpoint of battery characteristics and the like.

Examples of metal current collectors include copper, aluminum, titanium, nickel, tantalum, niobium, hafnium, zirconium, zinc, tungsten, bismuth, antimony, alloys containing one or more of these metals, and stainless steel alloys. One or more metal materials selected from: These metal materials may be used in the form of a thin plate, metal foil, or the like. Furthermore, a substrate made of a material other than the above-described metal material on which the above-mentioned metal material is formed by sputtering, electrodeposition, coating, or the like may be used as the metal current collector.

The resin current collector preferably contains a conductive filler and a matrix resin. Examples of the matrix resin include, but are not particularly limited to, polyethylene (PE), polypropylene (PP), polymethylpentene (PMP), and the like. Further, 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.

In addition to the matrix resin and the conductive filler, the resin current collector may contain other components (dispersant, crosslinking accelerator, crosslinking agent, coloring agent, ultraviolet absorber, plasticizer, etc.). Further, a plurality of resin current collectors may be stacked and used, or a resin current collector and a metal foil may be stacked and used.

The thickness of the positive electrode current collector layer 21a is not particularly limited, but 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 an optional filler dispersant into a film by a known method. I can do it.

<Specific examples of positive electrode active materials>
The positive electrode active material layer 22a is preferably a non-bound body of a mixture containing the positive electrode active material. Here, a non-bound body means that the position of the positive electrode active material in the positive electrode active material layer is not fixed, and the positive electrode active materials and the positive electrode active material and the current collector are not irreversibly fixed. means. When the positive electrode active material layer 22a is a non-binding body, the positive electrode active materials are not irreversibly fixed to each other, and therefore can be separated without mechanically destroying the interface between the positive electrode active materials. This is preferable because even when stress is applied to the material layer 22a, the movement of the positive electrode active material prevents the destruction of the positive electrode active material layer 22a. The positive electrode active material layer 22a, which is a non-binding body, can be obtained by a method such as changing the positive electrode active material layer 22a to a positive electrode active material layer 22a containing a positive electrode active material and an electrolyte and not containing a binder. can. In this specification, the term "binder" refers to a chemical that cannot reversibly fix the positive electrode active materials to each other or the positive electrode active material and the current collector, and includes starch, polyvinylidene fluoride, polyvinyl alcohol, carboxylic acid, etc. Examples include known solvent-dried binders for lithium ion batteries such as methylcellulose, polyvinylpyrrolidone, tetrafluoroethylene, styrene-butadiene rubber, polyethylene and polypropylene. These binders are used by being dissolved or dispersed in a solvent, and when the solvent is volatilized or distilled off, the surface becomes solid without exhibiting stickiness, so that the positive electrode active materials can be bonded to each other and the positive electrode active material and the current collector. cannot be fixed reversibly.

Examples of positive electrode active materials include, but are not particularly limited to, composite oxides of lithium and transition metals, composite oxides containing two types of transition metal elements, composite oxides containing three or more types of metal elements, etc. .

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

As the polymer compound constituting the coating material, those described as active material coating resins in JP2017-054703A, WO2015/005117, etc. can be suitably used.

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

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

The positive electrode active material layer 22a may contain an electrolytic solution containing an electrolyte and a nonaqueous solvent. As the electrolyte, those used in known electrolytes can be used. As the non-aqueous solvent, those used in known electrolytic solutions (for example, phosphoric acid esters, nitrile compounds, etc., 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 additive. As the conductive aid, a conductive material similar to the conductive filler contained in the positive electrode current collector layer 21a can be suitably used.

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

In the embodiment, the positive electrode composition supplied to form the positive electrode active material layer 22a is a wet powder containing a positive electrode active material and a non-aqueous electrolyte. Moreover, it is more preferable that the wet powder is in a pendular state or a funicular state.

The proportion of the non-aqueous electrolyte in the wet powder is not particularly limited, but in the case of a positive electrode, the proportion of the non-aqueous electrolyte in the whole wet powder should be 0.5 to 0.5 to 100% in order to obtain a pendular state or a funicular state. The content is preferably 15% by weight.

<Specific example of negative electrode current collector>
As the negative electrode current collector constituting the negative electrode current collector layer 21b, one having the same structure as that described for the positive electrode current collector can be appropriately selected and used, and it 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. The thickness of the negative electrode current collector layer 21b is not particularly limited, but is preferably 5 to 150 μm.

<Specific examples of negative electrode active materials>
The negative electrode active material layer 22b is preferably a non-bound body of a mixture containing negative electrode active materials. The reason why it is preferable that the negative electrode active material layer is a non-bound body, and the method for obtaining the negative electrode active material layer 22b which is a non-bound body, is the reason why it is preferable that the positive electrode active material layer 22a is a non-bound body. , and the method for obtaining the positive electrode active material layer 22a which is a non-binding body.

As the negative electrode active material, for example, carbon-based materials, silicon-based materials, mixtures thereof, etc. can be used, but there is no particular limitation.

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

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

The negative electrode active material layer 22b contains an electrolyte solution containing an electrolyte and a nonaqueous solvent. Regarding the composition of the electrolytic solution, an electrolytic solution similar to that contained in the positive electrode active material layer 22a can be suitably used.

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

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

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

In the embodiment, the negative electrode composition supplied to form the negative electrode active material layer 22b is a wet powder containing a negative electrode active material and a non-aqueous electrolyte. Moreover, it is more preferable that the wet powder is in a pendular state or a funicular state.

The proportion of the non-aqueous electrolyte in the wet powder is not particularly limited, but in the case of a negative electrode, the proportion of the non-aqueous electrolyte should be 0.5 to 0.5 to the total wet powder in order to obtain a pendular state or a funicular state. The content is preferably 25% by weight.

<Specific example of separator>
Examples of the electrolyte held in the separator 30 include an electrolytic solution or a gel polymer electrolyte. By using these electrolytes, the separator 30 ensures high lithium ion conductivity. The form of the separator 30 includes, for example, a porous film made of polyethylene or polypropylene, but is not particularly limited. As the separator, a sulfide-based or oxide-based inorganic solid electrolyte, a polymer-based organic solid electrolyte, or the like can also be used. By applying a solid electrolyte, an all-solid-state battery can be constructed.

<Specific example of frame>
The frame 35 is not particularly limited as long as it is made of a material that is durable against the electrolytic solution, but for example, a polymer material is preferable, and a thermosetting polymer material is more preferable. The material constituting the frame 35 may be any material as long as it has insulation properties, sealing properties (liquid tightness), heat resistance under the battery operating temperature, etc., and a resin material is preferably employed. More specifically, examples of the frame 35 include epoxy resin, polyolefin resin, polyurethane resin, polyvinylidene fluoride resin, etc. Epoxy resin is preferred because it is highly durable and easy to handle. preferable.

<Battery electrode manufacturing device and battery electrode manufacturing method>
Next, a battery electrode manufacturing apparatus and a battery electrode manufacturing method (hereinafter simply referred to as the manufacturing method) of the present embodiment will be described. For example, in a battery electrode manufacturing apparatus and a battery electrode manufacturing method, a positive electrode 20a and a negative electrode 20b are first manufactured. The method for manufacturing the positive electrode 20a and the method for manufacturing the negative electrode 20b differ mainly in the electrode active material contained in the electrode active material layer 22. Here, as a method for manufacturing the electrode 20, methods for manufacturing the positive electrode 20a and the negative electrode 20b will be described together.

FIG. 2 is a schematic diagram of the battery electrode manufacturing apparatus 1000. For example, a battery electrode manufacturing apparatus 1000 includes a chamber 100, a conveyance apparatus 200, an electrode composition supply apparatus 300, a frame supply apparatus 400, a press apparatus 500, and an electrode composition production apparatus 600. In addition, below, the case where a strip|belt-shaped base film is the strip|belt-shaped current collector 21B is demonstrated as an example.

The chamber 100 is a room whose interior can be maintained at a pressure lower than atmospheric pressure. The pressure inside the chamber 100 is reduced below atmospheric pressure by a pressure reduction pump (not shown). Note that the standard atmospheric pressure is approximately 1013 hPa (approximately 105 Pa).

For example, a current collector roll 21R is arranged outside the chamber 100, and a band-shaped current collector 21B pulled out from the current collector roll 21R is conveyed into the chamber 100 through a slit. Hereinafter, the strip-shaped current collector 21B may be referred to as a current collector 21B. Note that the current collector 21B is the current collector 21 described above before being cut into a predetermined shape. The current collector 21B is transported at a predetermined speed along the transport direction Da. In the following description, the direction in which the current collector 21B is conveyed is referred to as the downstream side Da1, and the opposite direction is referred to as the upstream side Da2. Note that the external space of the chamber 100 in which the current collector roll 21R is arranged may be at normal pressure or may be reduced in pressure by a chamber different from the chamber 100.

Note that, as shown in FIG. 2, the upper side in the vertical direction Db is Db1, and the lower side in the vertical direction Db is Db2. The direction perpendicular to the transport direction Da and the vertical direction Db corresponds to the width direction of the current collector 21B and the electrode composition 22c placed on the current collector 21B.

The transport device 200 transports the current collector 21B to the downstream side Da1 in the transport direction Da. For example, the conveyance device 200 is a belt conveyor that supports the current collector 21B from below. Note that after the electrode composition 22c is supplied by the electrode composition supply device 300 described below, the transportation device 200 transports the current collector 21B on which the electrode composition 22c is placed. Further, after the frame body 35 is supplied by the frame body supply device 400 described below, the conveyance device 200 conveys the current collector 21B on which the frame body 35 and the electrode composition 22c are placed. The transport device 200 is an example of a transport section.

As shown in FIG. 2, the electrode composition supply device 300 supplies the electrode composition 22c onto the current collector 21B transported within the chamber 100. For example, the electrode composition supply device 300 includes a hopper and a shutter. In this case, the electrode composition supply device 300 holds the electrode composition 22c inside a hopper having an opening on the lower side Db2 of the vertical direction Db, and opens and closes the opening of the hopper with a shutter to place the electrode composition 22c at a predetermined supply position. A predetermined amount of the electrode composition 22c can be supplied to the electrode composition 22c. The electrode composition 22c is, for example, a powdered active material.

The frame supply device 400 supplies the frame 35 to the current collector 21B being transported. For example, the frame supply device 400 includes a robot arm and places the frame 35 manufactured in advance at a predetermined position on the current collector 21B being transported. Alternatively, the frame supply device 400 may manufacture the frame 35 on the current collector 21B. For example, the frame 35 is formed on the current collector 21B by using the current collector 21B as a base material and discharging or applying a predetermined material in a predetermined shape onto the current collector 21B using a dispenser, coater, etc. can be formed.

The press device 500 compresses the electrode composition 22c supplied to the current collector 21B. For example, the press device 500 has an upper roller 501 and a lower roller 502, as shown in FIG. The press device 500 uses an upper roller 501 and a lower roller 502 to sandwich and compress the electrode composition 22c supplied to the current collector 21B. That is, the press device 500 performs roll pressing on the electrode composition 22c.

In FIG. 2, an example has been described in which the frame body 35 is supplied by the frame body supply device 400 after the electrode composition supply device 300 supplies the electrode composition 22c. However, embodiments are not limited thereto. For example, after the frame body 35 is supplied by the frame body supply device 400, the electrode composition 22c may be supplied by the electrode composition supply device 300 to a position inside the frame body 35. Further, although FIG. 2 shows a case where the frame supply device 400 is arranged inside the chamber 100, the frame supply device 400 may be arranged outside the chamber 100.

The electrode composition generating device 600 is a device that generates the electrode composition 22c. The above-mentioned electrode composition supply device 300 supplies the electrode composition 22c produced by the electrode composition production device 600 to the current collector 21B.

As an example of the electrode composition production device 600, the electrode composition production device 610 in FIG. 3 will be described. For example, the electrode composition generation device 610 includes a hopper 611, an active material particle supply device 612a, a resin solution supply device 612b, a devolatilization device 613, a conductive agent supply device 614a, an electrolyte solution supply device 614b, It includes a deaerator 615, a screw 616a, and a screw 616b. The active material particle supply device 612a and the resin solution supply device 612b are examples of a first supply section. The conductive aid supply device 614a and the electrolytic solution supply device 614b are examples of a second supply section. The screw 616a and the screw 616b are examples of extrusion parts. The devolatilizing device 613 is an example of a devolatilizing section. The deaerator 615 is an example of a deaerator.

The hopper 611 has a storage space inside and holds therein the substances supplied from the active material particle supply device 612a, the resin solution supply device 612b, the conductive agent supply device 614a, and the electrolyte solution supply device 614b. Further, as shown in FIG. 3, the hopper 611 includes an opening 611a, an opening 611b, an opening 611c, an opening 611d, and an opening 611e. The opening 611a and the opening 611b are examples of first openings. The opening 611c and the opening 611d are examples of second openings. The opening 611e is an example of a third opening.

The active material particle supply device 612a supplies active material particles to the accommodation space inside the hopper 611 from the opening 611a. The resin solution supply device 612b supplies a resin solution to the accommodation space inside the hopper 611 from the opening 611b. Note that the resin solution is a resin dissolved in a solvent. The active material particles and the resin solution are examples of coated active material materials.

The conductive agent supply device 614a supplies the conductive agent to the storage space inside the hopper 611 from the opening 611c. The electrolyte supply device 614b supplies an electrolyte to the accommodation space inside the hopper 611 from the opening 611b. A conductive aid and an electrolyte are examples of auxiliary materials.

The screw 616a and the screw 616b are members having a spiral protrusion around the rotation axis, and by rotating within the accommodation space of the hopper 611, push out the substance in the accommodation space in the direction along the rotation axis. Here, the screw 616a and the screw 616b can extrude the substance in the storage space while kneading it.

Specifically, the

screws

616a and 616b knead and extrude the substance in the storage space from the

openings

611a and 611b toward the

openings

611c and 611d. Here, a devolatilizing device 613 is provided between the

openings

611a and 611b and the

openings

611c and 611d. The devolatilization device 613 devolatilizes the active material particles and resin solution kneaded by the

screws

616a and 616b.

Further, the screw 616a and the screw 616b push out the substance in the storage space from the opening 611c and the opening 611d toward the opening 611e while kneading it. Here, a deaerator 615 is provided between the

openings

611c and 611d and the opening 611e. The deaerator 615 deaerates the active material particles, resin solution, conductive aid, and electrolyte solution kneaded by the

screws

616a and 616b.

The electrode composition 22c is prepared by kneading various substances supplied from the active material particle supply device 612a, the resin solution supply device 612b, the conductive agent supply device 614a, and the electrolyte solution supply device 614b using the screw 616a and the screw 616b. can be generated. The generated electrode composition 22c is discharged into the chamber 100 from the opening 611e, as shown in FIG. The electrode composition 22c discharged into the chamber 100 is supplied by the electrode composition supply device 300 to the current collector 21B being transported.

According to the electrode composition generating device 610 shown in FIG. 3, the electrode composition 22c can be continuously generated. That is, the electrode composition 22c is continuously produced by completing a plurality of steps such as charging the coating active material, charging the auxiliary material, and kneading these various substances as a series of processes in the hopper. Generation efficiency can be improved.

Although FIG. 3 shows an example in which the opening 611b is arranged closer to the opening 611e than the opening 611a, the embodiment is not limited to this. That is, the opening 611a may be arranged closer to the opening 611e than the opening 611b. Similar changes can be made to the arrangement of the opening 611c and the opening 611d.

Further, in FIG. 3, a screw 616a and a screw 616b are shown as an example of the extrusion part. However, the embodiment is not limited to this, and the electrode composition generating device 610 may include three or more screws as the extrusion section. Alternatively, the electrode composition generating device 610 may include one screw as the extrusion section.

The electrode composition generating device 610 shown in FIG. 3 is an example, and various modifications are possible. Modifications of the electrode composition generating device 600 will be described below with reference to FIGS. 4 to 9.

(Modification 1)
In FIG. 4, an electrode composition generating device 620 is shown as an example of the electrode composition generating device 600. The electrode composition generating device 620 includes a hopper 621, a hopper 622, a hopper 623, an active material particle supply device 624a, a resin solution supply device 624b, a devolatilization device 625, a degassing device 626, and a conductive support agent. It includes a supply device 627a, an electrolyte supply device 627b, a deaerator 628, a screw 629a, a screw 629b, a screw 629c, a screw 629d, and a screw 629e.

The active material particle supply device 624a and the resin solution supply device 624b are examples of the first supply section. The conductive agent supply device 627a and the electrolytic solution supply device 627b are examples of the second supply section. The screw 629a, the screw 629b, the screw 629c, the screw 629d, and the screw 629e are examples of the extrusion part. The devolatilization device 625 is an example of a devolatilization section. The deaerator 626 and the deaerator 628 are examples of a deaerator.

Furthermore, the screw 629a and the screw 629b are examples of the first member. The screw 629c is an example of the second member. The screw 629d and the screw 629e are examples of the third member.

The hopper 621, the hopper 622, and the hopper 623 each have a storage space inside and hold the substances supplied from the active material particle supply device 624a, the resin solution supply device 624b, the conductive agent supply device 627a, and the electrolyte solution supply device 627b. do. Note that, as shown in FIG. 4, the hopper 621, hopper 622, and hopper 623 form one continuous accommodation space. Further, as shown in FIG. 4, the hopper 621 includes an opening 621a and an opening 621b. The opening 621a and the opening 621b are examples of first openings. Further, the hopper 623 includes an opening 623a, an opening 623b, and an opening 623c. The opening 623a and the opening 623b are examples of second openings. The opening 623c is an example of a third opening.

The active material particle supply device 624a supplies active material particles to the accommodation space inside the hopper 621 from the opening 621a. The resin solution supply device 624b supplies the resin solution to the accommodation space inside the hopper 621 from the opening 621b. The conductive agent supply device 627a supplies the conductive agent to the accommodation space inside the hopper 623 from the opening 623a. The electrolyte supply device 627b supplies an electrolyte to the accommodation space inside the hopper 623 from the opening 623b.

As shown in FIG. 4, the devolatilization device 625 is provided at a position between the

openings

621a and 621b and the openings 623a and 623b. Furthermore, the degassing device 626 is provided at a position between the devolatilizing device 625 and the openings 623a and 623b. The screw 629a and the screw 629b push out the substance in the storage space while kneading it toward the devolatilization device 625 from the opening 621a and the opening 621b. The screw 629c extrudes the substance extruded by the

screws

629a and 629b while kneading it upward in the vertical direction. That is, the screw 629c imparts potential energy to the substance within the accommodation space.

The deaerator 626 deaerates the substance that is falling downward in the vertical direction after being pushed upward in the vertical direction by the screw 629c. Here, since the falling substance is in a sparsely scattered state, the deaerator 626 can perform deaeration efficiently.

The screw 629d and the screw 629e knead and push out the substance that has been pushed out vertically upward by the screw 629c and then fallen vertically downward toward the openings 623a and 623b. That is, the screws 629d and 629e push out the substance degassed by the deaerator 626 toward the openings 623a and 623b while kneading it.

Furthermore, the screw 629d and the screw 629e push out the substance in the storage space from the opening 623a and the opening 623b toward the opening 623c while kneading it. Here, a deaerator 628 is provided at a position between the openings 623a and 623b and the opening 623c. The degassing device 628 degasses the active material particles, resin solution, conductive aid, and electrolytic solution kneaded by the various screws described above.

As in the case of the electrode composition generation device 610, the electrode composition 22c can be continuously generated using the electrode composition generation device 620 in FIG. That is, it is possible to complete a plurality of steps such as charging the coating active material, charging the auxiliary material, and kneading these various substances within one continuous storage space formed by the hopper 621, hopper 622, and hopper 623. can. The electrode composition 22c generated by the electrode composition generation device 620 is discharged into the chamber 100 from the opening 623c, and is supplied to the current collector 21B by the electrode composition supply device 300.

Note that, as in the case of FIG. 3, the positional relationship between the opening 621a and the opening 621b and the positional relationship between the opening 623a and the opening 623b in FIG. 4 can be arbitrarily modified. Further, the number of screws that the electrode composition generating device 620 has as an extrusion section is arbitrary.

(Modification 2)
As another example of the electrode composition generating apparatus 600, an electrode composition generating apparatus 630 is shown in FIG. The electrode composition generating device 630 includes a hopper 631, a hopper 632, a hopper 633, an active material particle supply device 634a, a resin solution supply device 634b, a devolatilization device 635, an opening section 636, and a conductive agent supply device. It includes a device 637a, an electrolyte supply device 637b, a deaerator 638, a screw 639a, a screw 639b, a screw 639c, a screw 639d, and a screw 639e.

The active material particle supply device 634a and the resin solution supply device 634b are examples of the first supply section. The conductive aid supply device 637a and the electrolytic solution supply device 637b are examples of a second supply section. The screw 639a, the screw 639b, the screw 639c, the screw 639d, and the screw 639e are examples of the extrusion part. The devolatilizing device 635 is an example of a devolatilizing section. The open portion 636 is an example of an open portion. The deaerator 638 is an example of a deaerator.

Further, the screw 639a and the screw 639b are examples of the first member. The screw 639c is an example of the second member. The screw 639d and the screw 639e are examples of the third member.

The hopper 631, the hopper 632, and the hopper 633 have storage spaces inside, and hold substances supplied from the active material particle supply device 634a, the resin solution supply device 634b, the conductive agent supply device 637a, and the electrolyte solution supply device 637b. do. Note that, as shown in FIG. 5, the hopper 631, the hopper 632, and the hopper 633 form one continuous accommodation space. Further, as shown in FIG. 4, the hopper 631 includes an opening 631a and an opening 631b. The opening 631a and the opening 631b are examples of first openings. Further, the hopper 633 includes an opening 633a, an opening 633b, and an opening 633c. The opening 633a and the opening 633b are examples of second openings. The opening 633c is an example of a third opening.

The active material particle supply device 634a supplies active material particles to the accommodation space inside the hopper 631 from the opening 631a. The resin solution supply device 634b supplies a resin solution to the accommodation space inside the hopper 631 from the opening 631b. The conductive agent supply device 637a supplies the conductive agent to the accommodation space inside the hopper 633 from the opening 633a. The electrolytic solution supply device 637b supplies an electrolytic solution to the accommodation space inside the hopper 633 from the opening 633b.

As shown in FIG. 5, the devolatilization device 635 is provided at a position between the

openings

631a and 631b and the openings 633a and 633b. Further, a degassing device 636 is provided at a position between the devolatilizing device 635 and the openings 633a and 633b. The screw 639a and the screw 639b push out the substance in the storage space while kneading it toward the devolatilization device 635 from the opening 631a and the opening 631b. The screw 639c extrudes the substance extruded by the

screws

639a and 639b while kneading it upward in the vertical direction. That is, the screw 639c imparts potential energy to the substance within the accommodation space.

The open portion 636 is a gap provided between the hopper 632 and the hopper 633. At the opening 636, the substance within the accommodation space comes into contact with air. More specifically, the opening portion 636 exposes the substance that is falling downward in the vertical direction after being pushed upward in the vertical direction by the screw 639c to the air. Here, the falling substances are scattered in a sparse manner, so they can efficiently come into contact with the air.

The screw 639d and the screw 639e knead and push out the substance that has been pushed out vertically upward by the screw 639c and then fallen vertically downward toward the openings 633a and 633b. That is, the screws 639d and 639e knead and push out the substance that has been exposed to air in the opening 636 toward the openings 633a and 633b.

Furthermore, the screw 639d and the screw 639e push out the substance in the storage space from the opening 633a and the opening 633b toward the opening 633c while kneading it. Here, a deaerator 638 is provided at a position between the openings 633a and 633b and the opening 633c. The degassing device 638 degasses the active material particles, resin solution, conductive aid, and electrolytic solution kneaded by the various screws described above.

According to the electrode composition generating device 630 of FIG. 5, the electrode composition 22c can be continuously generated. That is, it is possible to complete a plurality of steps such as charging the coating active material, charging the auxiliary material, and kneading these various substances within one continuous storage space formed by the hopper 631, hopper 632, and hopper 633. can. The electrode composition 22c generated by the electrode composition generation device 630 is discharged into the chamber 100 from the opening 633c, and is supplied to the current collector 21B by the electrode composition supply device 300.

Note that, as in the case of FIG. 3, the positional relationship between the opening 631a and the opening 631b and the positional relationship between the opening 633a and the opening 633b in FIG. 5 can be arbitrarily modified. Further, the number of screws that the electrode composition generating device 630 has as an extrusion section is arbitrary.

(Modification 3)
As another example of the electrode composition generating apparatus 600, an electrode composition generating apparatus 640 is shown in FIG. The electrode composition generating device 640 includes a hopper 641, an active material particle supply device 642a, a gel pellet supply device 642b, a heating device 643, a conductive agent supply device 644a, an electrolytic solution supply device 644b, and a degassing device. It includes a device 645, a screw 646a, and a screw 646b. The active material particle supply device 642a and the gel pellet supply device 642b are examples of the first supply section. The conductive aid supply device 644a and the electrolyte supply device 644b are examples of a second supply section. The screw 646a and the screw 646b are examples of extrusion parts. The heating device 643 is an example of a heating section. The deaerator 645 is an example of a deaerator.

The hopper 641 has a storage space inside and holds therein the substances supplied from the active material particle supply device 642a, the gel pellet supply device 642b, the conductive aid supply device 644a, and the electrolyte supply device 644b. Further, as shown in FIG. 6, the hopper 641 includes an opening 641a, an opening 641b, an opening 641c, an opening 641d, and an opening 641e. The opening 641a and the opening 641b are examples of first openings. The opening 641c and the opening 641d are examples of second openings. The opening 641e is an example of a third opening.

The active material particle supply device 642a supplies active material particles to the accommodation space inside the hopper 641 from the opening 641a. The gel pellet supply device 642b supplies gel pellets to the accommodation space inside the hopper 641 from the opening 641b. Note that while the resin solutions shown in FIGS. 3 to 5 are solutions containing resin, the gel pellets are resin in a solid state or a molten state. Gel pellets are an example of coated active material.

The conductive agent supply device 644a supplies the conductive agent to the storage space inside the hopper 641 from the opening 641c. The electrolyte supply device 644b supplies an electrolyte to the accommodation space inside the hopper 641 from the opening 641b.

The

screws

646a and 646b knead and extrude the substance in the accommodation space from the

openings

641a and 641b toward the

openings

641c and 641d. Here, a heating device 643 is provided at a position between the

openings

641a and 641b and the

openings

641c and 641d. The heating device 643 heats the active material particles and gel pellets kneaded by the

screws

646a and 646b.

Further, the screw 646a and the screw 646b push out the substance in the accommodation space from the opening 641c and the opening 641d toward the opening 641e while kneading it. Here, a deaerator 645 is provided at a position between the

openings

641c and 641d and the opening 641e. The deaerator 645 deaerates the active material particles, gel pellets, conductive aid, and electrolyte solution kneaded by the

screws

646a and 646b.

According to the electrode composition generating device 640 of FIG. 6, the electrode composition 22c can be continuously generated. That is, a plurality of steps such as charging the coating active material, charging the auxiliary material, and kneading these various substances can be completed within the accommodation space provided in the hopper 641. The electrode composition 22c generated by the electrode composition generation device 640 is discharged into the chamber 100 from the opening 641c, and is supplied to the current collector 21B by the electrode composition supply device 300.

Note that, as in the case of FIG. 3, the positional relationship between the opening 641a and the opening 641b and the positional relationship between the opening 641c and the opening 641d in FIG. 6 can be arbitrarily modified. Further, the number of screws that the electrode composition generating device 640 has as an extrusion section is arbitrary.

(Modification 4)
In FIG. 7, an electrode composition generating device 650 is shown as an example of the electrode composition generating device 600. The electrode composition generating device 650 includes a hopper 651, a hopper 652, a hopper 653, an active material particle supply device 654a, a gel pellet supply device 654b, a heating device 655, a degassing device 656, and a conductive support agent. It includes a supply device 657a, an electrolyte supply device 657b, a deaerator 658, a screw 659a, a screw 659b, a screw 659c, a screw 659d, and a screw 659e.

The active material particle supply device 654a and the gel pellet supply device 654b are examples of the first supply section. The conductive aid supply device 657a and the electrolyte supply device 657b are examples of the second supply section. The screw 659a, the screw 659b, the screw 659c, the screw 659d, and the screw 659e are examples of the extrusion part. The heating device 655 is an example of a heating section. The deaerator 656 and the deaerator 658 are examples of a deaerator.

Further, the screw 659a and the screw 659b are examples of the first member. The screw 659c is an example of the second member. The screw 659d and the screw 659e are examples of the third member.

The hopper 651, the hopper 652, and the hopper 653 each have a storage space inside, and receive the substances supplied from the active material particle supply device 654a, the gel pellet supply device 654b, the conductive agent supply device 657a, and the electrolyte solution supply device 657b. Hold. Note that, as shown in FIG. 7, the hopper 651, hopper 652, and hopper 653 form one continuous accommodation space. Further, as shown in FIG. 7, the hopper 651 includes an opening 651a and an opening 651b. The opening 651a and the opening 651b are examples of first openings. Further, the hopper 653 includes an opening 653a, an opening 653b, and an opening 653c. The opening 653a and the opening 653b are examples of second openings. The opening 653c is an example of a third opening.

The active material particle supply device 654a supplies active material particles to the accommodation space inside the hopper 651 from the opening 651a. The gel pellet supply device 654b supplies gel pellets to the accommodation space inside the hopper 651 from the opening 651b. The conductive agent supply device 657a supplies the conductive agent to the accommodation space inside the hopper 653 from the opening 653a. The electrolyte supply device 657b supplies an electrolyte to the accommodation space inside the hopper 653 from the opening 653b.

As shown in FIG. 7, the heating device 655 is provided at a position between the

openings

651a and 651b and the openings 653a and 653b. Further, a deaerator 656 is provided at a position between the heating device 655 and the openings 653a and 653b. The

screws

659a and 659b push out the substance in the storage space while kneading it toward the heating device 655 from the

openings

651a and 651b. The screw 659c extrudes the substance extruded by the

screws

659a and 659b while kneading it upward in the vertical direction. That is, the screw 659c imparts potential energy to the substance within the accommodation space.

The deaerator 656 deaerates the substance that is falling downward in the vertical direction after being pushed upward in the vertical direction by the screw 659c. Here, since the falling substances are scattered in a sparse manner, the deaerator 656 can efficiently perform deaeration.

The screw 659d and the screw 659e knead and push out the substance that has been pushed out vertically upward by the screw 659c and then fallen vertically downward toward the openings 653a and 653b. That is, the screw 659d and the screw 659e push out the substance degassed by the deaerator 656 toward the openings 653a and 653b while kneading it.

Further, the screw 659d and the screw 659e push out the substance in the accommodation space from the opening 653a and the opening 653b toward the opening 653c while kneading it. Here, a deaerator 658 is provided at a position between the openings 653a and 653b and the opening 653c. The degassing device 658 degasses the active material particles, gel pellets, conductive aid, and electrolytic solution kneaded by the various screws described above.

According to the electrode composition generating device 650 of FIG. 7, the electrode composition 22c can be continuously generated. That is, a plurality of steps such as charging the coating active material, charging the auxiliary materials, and kneading these various substances can be completed within one continuous storage space formed by the hopper 651, hopper 652, and hopper 653. can. The electrode composition 22c generated by the electrode composition generation device 650 is discharged into the chamber 100 from the opening 653c, and is supplied to the current collector 21B by the electrode composition supply device 300.

Note that, as in the case of FIG. 3, the positional relationship between the opening 651a and the opening 651b and the positional relationship between the opening 653a and the opening 653b in FIG. 7 can be arbitrarily modified. Further, the number of screws that the electrode composition generating device 650 has as an extrusion section is arbitrary.

(Modification 5)
As another example of the electrode composition generating apparatus 600, an electrode composition generating apparatus 660 is shown in FIG. A hopper 661, an active material particle supply device 662a, a conductive agent supply device 663a, an electrolyte supply device 663b, a deaerator 664, a screw 665a, and a screw 665b included in the electrode composition generation device 660 have the electrode composition shown in FIG. The structure is similar to the hopper 641, active material particle supply device 642a, conductive agent supply device 644a, electrolyte supply device 644b, deaerator 645, screw 646a, and screw 646b in the product generation device 640. The electrode composition generating device 660 may include a heating device similarly to the electrode composition generating device 640.

Compared to the electrode composition generation device 640 shown in FIG. 6, the electrode composition generation device 660 includes a gel pellet supply device 662b including a powdering device 662c instead of the gel pellet supply device 642b. differ. That is, the gel pellet supply device 662b powderizes the gel pellets and then supplies them to the storage space in the hopper 661. This makes it possible to further homogenize the substance in the accommodation space and improve the quality of the produced electrode composition 22c.

(Modification 6)
As another example of the electrode composition generating apparatus 600, an electrode composition generating apparatus 670 is shown in FIG. A hopper 671, an active material particle supply device 672a, a conductive agent supply device 673a, an electrolyte supply device 673b, a deaerator 674, a screw 675a, and a screw 675b included in the electrode composition generation device 670 have the electrode composition shown in FIG. The structure is similar to the hopper 641, active material particle supply device 642a, conductive agent supply device 644a, electrolyte supply device 644b, deaerator 645, screw 646a, and screw 646b in the product generation device 640. The electrode composition generating device 670 may include a heating device similarly to the electrode composition generating device 640.

Compared to the electrode composition generation apparatus 640 shown in FIG. 6, the electrode composition generation apparatus 670 includes a gel pellet supply apparatus 672b and a gel pellet supply apparatus 672c instead of a single gel pellet supply apparatus 642b. They differ in that they have the following. That is, the electrode composition generating device 670 supplies gel pellets to the accommodation space in the hopper 671 from the plurality of first openings. Thereby, the gel pellets can be dispersed and supplied, and the quality of the generated electrode composition 22c can be improved.

Note that not only gel pellets but also coated active material materials such as active material particles and resin solution may be supplied from the plurality of first openings. Further, auxiliary materials such as a conductive aid and an electrolyte may be supplied from a plurality of second openings.

In the embodiment described above, the strip-shaped base film on which the electrode composition 22c is placed is the strip-shaped current collector 21B, but the present invention is not limited to this. For example, instead of the strip-shaped current collector 21B shown in FIG. 2, a strip-shaped separator sheet or a strip-shaped release film may be used as the base film. Note that the separator sheet 30 shown in FIG. 1 can be formed by trimming the band-shaped separator sheet later.

Although the embodiment of the present invention has been described in detail with reference to the drawings above, the specific configuration is not limited to this embodiment, and modifications, combinations, deletions, etc. of the configuration within the scope of the gist of the present invention, etc. Also included. Furthermore, it goes without saying that the configurations shown in each embodiment can be used in appropriate combinations. Among secondary batteries, when using the lithium ion secondary battery exemplified in the above explanation, it includes a battery that uses a liquid material as an electrolyte, and a battery that uses a solid material as an electrolyte (a so-called all-solid-state battery). Furthermore, the battery in this embodiment includes a battery having a metal foil (metal current collector foil) as a current collector, and a so-called resin current collector made of resin to which a conductive material is added instead of the metal foil. Including batteries with. When the resin current collector is used as a resin current collector for bipolar electrodes, a positive electrode is formed on one surface of the resin current collector and a negative electrode is formed on the other surface to form a bipolar electrode. It may be something that has been done. Note that the batteries in this embodiment include those in which electrodes are formed by applying a positive electrode or negative electrode active material or the like to a positive electrode or negative electrode current collector using a binder, and in the case of a bipolar type battery, A bipolar electrode is constructed by applying a positive electrode active material etc. using a binder to one side of the current collector to form a positive electrode layer, and applying a negative electrode active material etc. using a binder to the opposite side to form a negative electrode layer. Including those who did.

Claims

A first opening having an accommodation space therein, through which the covering active material is supplied to the accommodation space, a second opening through which an auxiliary material is supplied to the accommodation space, and a second opening through which the substance in the accommodation space is discharged. a hopper comprising at least three openings;
a first supply unit that supplies the coated active material from the first opening to the accommodation space;
a second supply unit that supplies the auxiliary material from the second opening to the accommodation space;
an extrusion unit that kneads and extrudes the substance in the accommodation space from the first opening toward the second opening, and further extrudes the substance from the second opening toward the third opening while kneading it; Battery electrode manufacturing equipment.
The coated active material includes at least active material particles and a resin solution,
The battery electrode manufacturing apparatus according to claim 1, further comprising a devolatilization section located between the first opening and the second opening in the hopper.
further comprising a degassing part in the hopper at a position between the devolatilization part and the second opening,
The extrusion section is
a first member that kneads and pushes out the substance in the storage space from the first opening toward the devolatilization section;
a second member that extrudes the substance extruded by the first member while kneading it vertically upward;
The substance that has been pushed out vertically upward by the second member and then fallen vertically downward is pushed out while being kneaded toward the second opening, and further kneaded from the second opening toward the third opening. and a third member that extrudes while
3. The battery electrode manufacturing apparatus according to claim 2, wherein the devolatilization section degasses the substance that is falling downward in the vertical direction after being pushed upward in the vertical direction by the second member.
further comprising an opening part in the hopper at a position between the devolatilization part and the second opening,
The extrusion section is
a first member that kneads and pushes out the substance in the storage space from the first opening toward the opening;
a second member that extrudes the substance extruded by the first member while kneading it vertically upward;
The substance that has been pushed out vertically upward by the second member and then fallen vertically downward is pushed out while being kneaded toward the second opening, and further kneaded from the second opening toward the third opening. and a third member that extrudes while
3. The battery electrode manufacturing apparatus according to claim 2, wherein the opening portion exposes the substance falling downward in the vertical direction after being pushed upward in the vertical direction by the second member to air.
The coated active material includes at least active material particles and gel pellets,
The battery electrode manufacturing apparatus according to claim 1, further comprising a heating section at a position between the first opening and the second opening in the hopper.
further comprising a degassing section in the hopper at a position between the heating section and the second opening,
The extrusion section is
a first member that kneads and extrudes the substance in the storage space from the first opening toward the heating section;
a second member that extrudes the substance extruded by the first member while kneading it vertically upward;
The substance that has been pushed out vertically upward by the second member and then fallen vertically downward is pushed out while being kneaded toward the second opening, and further kneaded from the second opening toward the third opening. and a third member that extrudes while
6. The battery electrode manufacturing apparatus according to claim 5, wherein the deaeration section deaerates the substance that is falling downward in the vertical direction after being pushed upward in the vertical direction by the second member.
6. The battery electrode manufacturing apparatus according to claim 5, wherein the first supply unit powderizes the gel pellets and supplies the powdered pellets to the accommodation space from the first opening.
The battery electrode manufacturing apparatus according to claim 5, wherein the first supply unit supplies the gel pellets to the accommodation space from the plurality of first openings.
The battery electrode manufacturing apparatus according to claim 1, further comprising a deaeration section at a position between the second opening and the third opening in the hopper.
The battery electrode manufacturing apparatus according to claim 1, wherein the third opening discharges the substance in the accommodation space into a reduced pressure chamber into which a strip-shaped base film is carried.
Supplying a coated active material from a first opening provided in the hopper to the accommodation space in the hopper;
Supplying an auxiliary material to the storage space from a second opening provided in the hopper,
The substance in the storage space is kneaded and extruded from the first opening toward the second opening, further extruded while being kneaded from the second opening toward a third opening provided in the hopper, and A method for manufacturing an electrode for a battery, comprising: discharging a substance in the accommodation space from the third opening.