JP2020050899A - Anode device, manufacturing apparatus of aluminum foil, and manufacturing method of aluminum foil - Google Patents

Abstract

To provide an anode device, a manufacturing apparatus of an aluminum foil, and a manufacturing method of an aluminum foil in which the conformity of the shapes of both curved surfaces of a cathode and an anode can be maintained in manufacturing an aluminum foil using an electric aluminum plating liquid, and in which the uniformity of clearance between the cathode and the anode can also be maintained.SOLUTION: An anode device, which is used together with a cathode device having a cathode (aluminum deposition region) on a side surface of a right columnar body, comprises: a housing for pooling aluminum grains that can be arranged below the right columnar body; an electrode part for applying an electric current to the aluminum grains in the housing; grain feeding parts for feeding the aluminum grains into the housing; stirring parts for stirring the aluminum grains in the housing; and grain discharging parts for discharging small aluminum grains in the housing. In the housing, the multiple aluminum grains abut against an inner wall surface of a downwardly convex-curved plate that has a plurality of through holes. An outer edge of a cross-section of the inner wall surface facing the aluminum deposition region has a constant clearance with the side surface of the right columnar body.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an anode device, an apparatus for manufacturing an aluminum foil, and a method for manufacturing an aluminum foil.

  Negative electrode current collectors and positive electrode current collectors are used for power storage devices such as lithium ion secondary batteries and supercapacitors (electric double layer capacitors, redox capacitors, lithium ion capacitors, etc.). Copper foil is mainly used as the base material of the negative electrode current collector. The copper foil is produced by a rolling method or an electroplating method (electroforming method, electrolytic method). Aluminum foil is mainly used as the base material of the positive electrode current collector. The aluminum foil is produced exclusively by a rolling method. As the densification of power storage devices progresses, the demand for aluminum foil having a smaller thickness that can cope with the higher density is increasing. However, it is substantially impossible to produce an aluminum foil having a thickness of, for example, 12 μm or less by a rolling method. Was difficult.

  In recent years, literature on an electroplating method capable of producing an aluminum foil having a smaller thickness has been scattered. For example, in an electroplating method disclosed in Patent Document 1, a titanium drum and an aluminum plate are arranged in an electroaluminum plating solution, and a current is applied between both electrodes while rotating the titanium drum. Is to deposit aluminum on the surface of the substrate. In this electroplating method, the shape of the curved surface of the aluminum plate serving as the anode matches the shape of the curved surface of the titanium drum serving as the cathode. The aluminum plate is disposed such that the curved surface of the aluminum plate is separated from the curved surface of the titanium drum by a substantially constant distance.

JP 2017-48453 A

  When an aluminum foil is produced by an electroplating method, aluminum ions are released from an aluminum plate, which is an anode metal, at an anode while an electric current is applied, and aluminum ions in an electroaluminum plating solution are reduced at a cathode. As a result, aluminum elutes from the surface of the curved surface of the aluminum plate as the anode and is consumed, and aluminum precipitates on the surface of the curved surface of the titanium drum as the cathode. As the elution of the curved surface of the aluminum plate progresses, the curved surface of the aluminum plate gradually deforms, and eventually the conformity of the curved surface shape of the aluminum plate and the curved surface of the titanium drum is lost. In addition, the uniformity of the distance between the curved surface of the aluminum plate and the curved surface of the titanium drum is lost. As a result, the electric field distribution of the cathode changes, and quality and characteristic changes occur in the aluminum foil. Therefore, a non-uniform aluminum foil is formed in the longitudinal direction.

  It is conceivable to move the aluminum plate closer to the curved surface of the titanium drum in accordance with the consumption of the curved surface of the aluminum plate. However, the elution of the curved surface of the aluminum plate proceeds uniformly on the surface opposite to the curved surface of the titanium drum. For this reason, the curved surface of the aluminum plate changes so as to have a smaller curvature than the curved surface of the titanium drum. As a result, the curvature of the curved surface of the aluminum plate at the stage where the application of the current is started does not match the curvature at the stage where the application of the current is advanced. Therefore, even if the aluminum plate is moved closer to the curved surface of the titanium drum in accordance with the consumption of the curved surface of the aluminum plate, the uniformity of the separation distance between the curved surface of the aluminum plate and the curved surface of the titanium drum is maintained. It is difficult to do.

  According to the present invention, when manufacturing an aluminum foil using an electroaluminum plating solution, it is possible to maintain the consistency of the shapes of the curved surfaces of the cathode and the anode and to maintain the uniformity of the separation distance between the cathode and the anode. An object of the present invention is to provide an anode device, and to provide an aluminum foil manufacturing apparatus and an aluminum foil manufacturing method equipped with the anode device.

The above problem could be solved by conceiving a means for forming a positive electrode by storing a plurality of granular aluminum in a housing having a specific structure.
An anode device according to the present invention is an anode device for producing an aluminum foil using together with a cathode device having an aluminum deposition region configured as a cathode on the side surface of a right cylinder having a rotation axis, wherein the anode device is A housing configured to store a plurality of granular aluminum that can be arranged below the right cylindrical body, an electrode unit that applies a current to the plurality of granular aluminum in the housing, and the granular aluminum is fed into the housing. It has a particle feeding unit, a stirring unit for stirring the granular aluminum in the housing, and a particle discharging unit for discharging the small-sized granular aluminum in the housing, and the housing has a plurality of through-holes facing downward. The curved plate portion has an inner wall surface located in the housing and in contact with a plurality of granular aluminum, and faces the aluminum deposition region viewed from the direction of the rotation axis. Cross the outer edge of the inner wall surface is configured such that a constant distance from the side surface of the straight cylinder.

  In the anode device according to the present invention, it is preferable that the curved plate portion has an outer wall surface forming an outer surface of the housing, and the outer wall surface is configured to be parallel to the inner wall surface.

By mounting the anode device according to the present invention, an apparatus for manufacturing an aluminum foil can be configured.
That is, the apparatus for manufacturing an aluminum foil according to the present invention includes a cathode device having an aluminum deposition region configured as a cathode on a side surface of a right cylinder having a rotation axis, and an anode in a housing arranged below the right cylinder. An anode device configured to store a plurality of granular aluminum, and an electrolytic cell configured to store an electroaluminum plating solution, wherein the anode device applies a current to the housing and the plurality of granular aluminum in the housing. An electrode unit for feeding granular aluminum into the housing, a stirring unit for stirring the granular aluminum in the housing, and a particle discharging unit for discharging the small-sized granular aluminum in the housing. The casing has a downwardly convex curved plate portion provided with a plurality of through-holes, and the curved plate portion has an inner wall surface located in the casing and in contact with a plurality of granular aluminum pieces. The outer edge of the cross section of the inner wall surface facing the aluminum deposition region viewed from the axial direction is configured so as to be at a constant interval with respect to the side surface of the right cylindrical body. By partially rotating the right column while applying a current between the aluminum deposition region and the plurality of granular aluminum in the case while the part and the housing are immersed, aluminum is deposited in the aluminum deposition region. An aluminum film is formed by forming an aluminum film and peeling the aluminum film raised from the liquid surface of the electroaluminum plating solution from the aluminum deposition region.

  In the apparatus for manufacturing an aluminum foil according to the present invention, it is preferable that the curved plate portion has an outer wall surface forming an outer surface of the housing, and the outer wall surface is configured to be parallel to the inner wall surface.

An aluminum foil manufacturing method can be configured using the aluminum foil manufacturing apparatus according to the present invention.
That is, the method for manufacturing an aluminum foil according to the present invention includes a cathode device having an aluminum deposition region configured as a cathode on a side surface of a straight cylinder having a rotating shaft, and an anode in a housing arranged below the straight cylinder. An anode device configured to store a plurality of granular aluminum and an electrolytic cell configured to store an electroaluminum plating solution are prepared, and the anode device applies an electric current to the housing and the plurality of granular aluminum in the housing. An electrode unit for feeding granular aluminum into the housing, a stirring unit for stirring the granular aluminum in the housing, and a particle discharging unit for discharging the small-sized granular aluminum in the housing. Then, the housing has a downwardly convex curved plate portion provided with a plurality of through holes, the curved plate portion has an inner wall surface located in the housing and in contact with a plurality of granular aluminum, The cross section of the inner wall surface facing the aluminum deposition region as viewed from the direction of the axis of rotation is configured so that the outer edge of the cross section is at a constant interval with respect to the side surface of the above-mentioned straight cylinder, and the aluminum deposition With a part of the region and the housing immersed, aluminum is deposited in the aluminum deposition region by rotating the right columnar body while applying current between the aluminum deposition region and the multiple granular aluminum in the housing. Thus, an aluminum film is formed, and the aluminum film which has risen from the surface of the electroaluminum plating solution is peeled from the aluminum deposition region to form an aluminum foil.

  In the method for manufacturing an aluminum foil according to the present invention, it is preferable that the curved plate portion has an outer wall surface forming an outer surface of the housing, and the outer wall surface is configured to be parallel to the inner wall surface.

  According to the present invention, when manufacturing an aluminum foil using an electroaluminum plating solution, it is possible to maintain the consistency of the shapes of the curved surfaces of the cathode and the anode and to maintain the uniformity of the separation distance between the cathode and the anode. is there. Therefore, a uniform aluminum foil can be produced in the longitudinal direction. As a result, it is possible to contribute to the practical use of an aluminum foil having a smaller thickness that can cope with an increase in the density of a power storage device.

It is a figure which shows one Embodiment of the manufacturing apparatus of the aluminum foil which concerns on this invention. FIG. 2 is an enlarged view including a partial cross section of an anode device mounted on the aluminum foil manufacturing apparatus shown in FIG. 1. FIG. 3 is an enlarged view of a cross section of a central portion of the anode device shown in FIG. 2. It is a figure showing the state where granular aluminum was filled in the case of the anode device. It is a figure showing the state where a predetermined amount of granular aluminum was stored in the case of the anode device.

  An embodiment of an anode device according to the present invention and an apparatus for manufacturing an aluminum foil on which the anode device is mounted will be exemplified, and will be described with reference to the drawings as appropriate. The anode device according to the present invention and the apparatus for manufacturing an aluminum foil on which the anode device is mounted are not limited to the embodiments illustrated below, but are indicated by the claims and have the same meaning as the claims. And all changes within the scope are intended to be included.

  FIG. 1 shows an embodiment of an aluminum foil manufacturing apparatus 100 (hereinafter, referred to as “foil making apparatus 100”) on which an anode device 20 according to the present invention is mounted. FIG. 2 is an enlarged view including a partial cross section of the anode device 20 shown in FIG. FIG. 3 is an enlarged view of a cross section of a central portion of the anode device 20 shown in FIG.

  The foil making apparatus 100 is an apparatus for producing an aluminum foil by an electroplating method. The foil making apparatus 100 includes a cathode device having an aluminum deposition region configured as a cathode on a side surface 1a of a right cylinder having a rotation axis (not shown), and a lower portion of the side surface 1a of the right cylinder having an aluminum deposition region. An anode device 20 shown in FIG. 2 for storing a plurality of granular aluminums 6 configured as anodes in a housing 2 arranged in the housing 2 and an electrolytic cell 4 for storing an electroaluminum plating solution 3 are provided. Thus, the plurality of granular aluminum 6 configured as the anode is configured to be located below the aluminum deposition region configured as the cathode. The plurality of granular aluminum 6 stored in the housing 2 of the anode device 20 is an anode metal.

  The foil making apparatus 100 includes a plurality of aluminum deposition regions and a plurality of the aluminum deposition regions in the housing 2 in a state where the aluminum deposition region configured as a cathode and the housing 2 of the anode device 20 are immersed in the electroaluminum plating solution 3. By rotating the right columnar body while applying a current to the granular aluminum 6, aluminum is deposited in the aluminum deposition region to form an aluminum film 10a. The aluminum foil 10 is obtained by peeling the raised aluminum film 10a from the aluminum deposition region.

  In the foil making apparatus 100, the cathode device has a right cylindrical body (hereinafter, referred to as a cathode drum 1) having a rotating shaft (not shown). The right cylindrical body of the cathode drum 1 is constituted by one side surface 1a and two bottom surfaces. The cathode drum 1 has rotating shafts projecting from the bottom surface at both ends of a right circular cylinder. The rotating shaft of the cathode drum 1 is rotatably supported by a bearing (not shown). When the right cylindrical body of the cathode drum 1 is viewed from the axial direction of the rotation axis (hereinafter, referred to as the rotation axis direction), the outer edge of a cross section (hereinafter, referred to as a cross section) of the side surface 1a is circular. An aluminum deposition region is formed on the side surface 1a of the right cylindrical body of the cathode drum 1. The aluminum deposition region is configured to be able to conduct electricity to the side surface 1a made of, for example, titanium, and can have a function as a cathode. The cathode drum 1 is configured to be rotatable in one direction while controlling the number of rotations.

  In the foil making apparatus 100, the anode device 20 includes a housing 2 disposed below the right cylindrical body of the cathode drum 1, an electrode unit 7 for applying a current to a plurality of granular aluminums 6 in the housing 2, A particle feeding portion 2a for feeding the granular aluminum 6 into the body 2, a stirring portion 2b for stirring the granular aluminum 6 in the housing 2, and a particle discharge for discharging the granular aluminum 6 reduced in the housing 2 It has a portion 2c (see FIG. 3).

  The anode device 20 has a housing 2 disposed below a right cylindrical body of the cathode drum 1. The housing 2 has a downwardly convex curved plate portion 21 provided with a plurality of through holes 21a. The curved plate portion 21 of the housing 2 has an inner wall surface 21b located inside the housing 2 and in contact with the plurality of granular aluminum members 6, and an outer wall surface 21c constituting an outer surface of the housing 2. The plurality of through holes 21 a provided in the curved plate portion 21 of the housing 2 allow the electric aluminum plating solution 3 to pass from inside the housing 2 to the outside of the housing 2 or from outside the housing 2 to the inside of the housing 2. Can be. When a plurality of granular aluminum 6 are stored in the housing 2 having the downwardly convex curved plate portion 21, the inner wall surface 21b of the curved plate portion 21 presses the plurality of granular aluminum 6 by the amount of downwardly convex portion. Become. When an electric current is applied to the plurality of granular aluminum 6 pressed by the curved plate portion 21, the granular aluminum reduced in size by melting is settled by its own weight, and another granular aluminum is moved by its own weight so as to fill a gap formed thereafter. Then, the state in which the granular aluminum 6 is in contact with the inner wall surface 21b of the curved plate portion 21 is easily maintained.

  A plurality of granular aluminums 6 are in contact with the inner wall surface 21b of the curved plate portion 21 of the housing 2. The granular aluminum 6 can be an anode metal. The plurality of granular aluminums 6 are stored in the housing 2 so as to be in contact with each other and abut on the inner wall surface 21b. The plurality of granular aluminums 6 that are in contact with each other and abut against the inner wall surface 21b are configured to be uniformly distributed along the inner wall surface 21b. In the present invention, a region composed of a plurality of granular aluminum 6 uniformly distributed along the inner wall surface 21b in a state of being in contact with each other (hereinafter, referred to as a surface region of the granular aluminum 6) is defined as a straight cylindrical body of the cathode drum 1. The side surface 1a functions as an anode that is used to face an aluminum deposition region configured as a cathode.

  The casing 2 of the anode device 20 is immersed in the electroaluminum plating solution 3 when producing an aluminum foil by an electrolytic method using a nonaqueous electrolyte (nonaqueous plating solution). The granular aluminum 6 in the housing 2 can be an anode metal because it is aluminum that is soluble in the electroaluminum plating solution 3 while a current is applied. The plurality of granular aluminums 6 in the casing 2 come into contact with each other, a part of the granular aluminum 6 contacts the inner wall surface 21 b of the curved plate portion 21 located in the casing 2, and a part is provided in the casing 2. In contact with the electrode portion 7 (see FIG. 3). Therefore, it is possible to configure a state in which the plurality of granular aluminum 6 in contact with the electrode portion 7 are in contact with each other up to the surface area of the granular aluminum 6 uniformly distributed along the inner wall surface 21b. Thus, a current can be supplied from the electrode portion 7 to the surface region of the granular aluminum 6, so that the surface region of the granular aluminum 6 can function as an anode.

  The inner wall surface 21b of the curved plate portion 21 of the housing 2 is particularly important for forming the surface area of the granular aluminum 6 described above. The inner wall surface 21b of the curved plate portion 21 is configured so as to be at a fixed interval (separation distance) with respect to the side surface 1a of the right cylindrical body of the cathode drum 1. As shown in FIG. 3, the outer edge of the cross section (cross section) of the inner wall surface 21 b facing the aluminum deposition region viewed from the rotation axis direction of the cathode drum 1 is located on the side surface 1 a of the right cylindrical body of the cathode drum 1 indicated by the two-dot chain line. On the other hand, it is configured to have a constant interval (separation distance d). Since the inner wall surface 21b of the curved plate portion 21 of the casing 2 of the anode device 20 is configured to have a fixed distance (separation distance d) from the side surface 1a of the right cylindrical body of the cathode drum 1, the inner wall surface 21b Are arranged at a constant distance (separation distance d) from the aluminum deposition region formed on the side surface 1a. Thus, the surface region of the granular aluminum 6, which is uniformly distributed along the inner wall surface 21b and functions as an anode, can be configured to have a fixed distance (a distance d) from the aluminum deposition region.

  As described above, the interval (separation distance) between the surface area of the granular aluminum 6 functioning as the anode and the aluminum deposition area configured as the cathode is constant, thereby stabilizing the aluminum deposition state. Can be done. As a result, the aluminum film formed by the deposition and growth of aluminum is stabilized, and the aluminum foil obtained by peeling the aluminum film is stabilized. Specifically, effects such as equalizing the thickness of the aluminum foil, stabilizing the structure, and improving the physical and mechanical properties can be obtained. Note that the distance (separation distance d) between the aluminum deposition region and the inner wall surface 21b of the curved plate portion 21 is preferably as small as not to obstruct the electric aluminum plating solution 3, and becomes smaller, for example, 20 mm, 18 mm, 16 mm, and 14 mm. Preferably, it is 12 mm or less, more preferably, 10 mm or less. The smaller the distance (separation distance d) between the aluminum deposition region and the inner wall surface 21b of the curved plate portion 21, the easier it is to make the aluminum deposition region serving as the cathode closer to the surface region of the granular aluminum 6 serving as the anode. In addition, it becomes easy to improve the aluminum deposition efficiency (electrolysis efficiency).

As described above, in the configuration in which the inner wall surface 21b of the housing 2 is at a constant distance (separation distance d) from the side surface 1a of the right cylindrical body of the cathode drum 1, the curvature of the inner wall surface 21b in the cross section is r. is _a, the curvature of the side surface 1a when the _{r c,} satisfy _r a <r _c. Incidentally, the curvature of the side surface 1a of the cathode drum 1, the curvature of the aluminum deposition area configured in the side face 1a is equal r _c, the curvature r _a of the inner wall surface 21b is the constant than the curvature r _c of the aluminum deposition region Is reduced by the amount having the interval of.

  The curved plate portion 21 of the housing 2 has an outer wall surface 21c that forms the outer surface of the housing 2. The outer wall portion 21c is preferably configured to be parallel to the inner wall surface 21b. The configuration in which the outer wall portion 21c is parallel to the inner wall surface 21b may be configured, for example, so that the thickness of the curved plate portion 21 is constant. The outer wall surface 21c, which is configured to be parallel to the inner wall portion 21b, is configured to have a constant distance (separation distance) from the aluminum deposition region, as with the inner wall surface 21b of the curved plate portion 21. Is done. As shown in FIG. 3, the outer edge of the cross section (cross section) of the outer wall surface 21 c facing the aluminum deposition region viewed from the rotation axis direction of the cathode drum 1 is located on the side surface 1 a of the right cylindrical body of the cathode drum 1 indicated by a two-dot chain line. On the other hand, it is configured to have a constant interval (separation distance d1). By forming the outer wall surface 21c of the curved plate portion 21 of the housing 2 so as to have a fixed distance (separation distance d1) from the aluminum deposition region, electric aluminum plating between the outer wall surface 21c and the aluminum deposition region is achieved. The flow of the liquid 3 is stabilized, and the precipitation state of aluminum can be further stabilized. As a result, the aluminum film formed by the deposition and growth of aluminum is further stabilized, and the aluminum foil obtained by peeling the aluminum film is further stabilized.

  As described above, the curved plate portion 21 having the inner wall surface 21b and the outer wall surface 21c having the constant interval d1 with respect to the side surface 1a of the cathode drum 1 is convex downward as shown in FIG. It is. When the thickness t (see FIG. 3) of the curved plate portion 21 is constant, the outer wall surface 21c has a constant distance d1 (d1 = dt) from the side surface 1a of the cathode drum 1. It is preferable that the distance (separation distance d1) between the aluminum deposition region and the outer wall surface 21c of the curved plate portion 21 is small as long as the electric aluminum plating solution 3 is not obstructed. The smaller the distance (separation distance d1) between the aluminum deposition region and the outer wall surface 21c of the curved plate portion 21, the closer the aluminum deposition region serving as a cathode and the surface region of the granular aluminum 6 serving as an anode become, the easier it becomes. It becomes easy to improve the aluminum deposition efficiency (electrolysis efficiency). The thickness t of the curved plate portion 21 is preferably as thin as 12 mm, 10 mm, 8 mm, and 6 mm, for example, more preferably 4 mm or less, and still more preferably 2 mm or less, as long as mechanical strength and workability can be secured. . As the thickness t of the curved plate portion 21 becomes thinner, the flow of aluminum ions from the inside of the housing 2 to the aluminum deposition region through the plurality of through holes 21a becomes less likely to be hindered, thereby improving the aluminum deposition efficiency (electrolysis efficiency). Becomes easier.

  A plurality of through-holes 21a are provided in the curved plate portion 21 forming the housing 2. The plurality of through-holes 21 a enable current to flow between the plurality of granular aluminum 6 stored in the housing 2 and the aluminum deposition region formed on the side surface 1 a of the cathode drum 1. The shape of the through hole 21a may be appropriately designed in consideration of the mechanical strength and workability of the curved plate portion 21. As for the shape of the through-hole 21a, the opening shapes on the outer wall surface 21c facing the side surface 1a of the cathode drum 1 may be all the same. The opening shape of the through hole 21a may be, for example, a polygonal shape such as a circular shape, a triangular shape, a square shape, a hexagonal shape, an elliptical shape, a rectangular shape, a rectangular polygonal shape, or the like. The shape of the through-hole 21a is such that the cross-sectional shape in the thickness direction of the curved plate portion 21 is straight through, the tapered shape extends toward the outer wall surface 21c in a tapered shape, or a combination of the above-described embodiments. It may be in any form. The plurality of through-holes 21a may have any one of the above-described opening shapes, and may be configured to have any one of the above-described cross-sectional shapes. The plurality of through holes 21a may be configured to combine a plurality of opening shapes and a plurality of cross-sectional shapes.

  It is preferable that the aperture ratio of the curved plate portion 21 by the plurality of through holes 21a is as large as possible, as long as the mechanical strength and workability of the curved plate portion 21 can be ensured. When the aperture ratio of the curved plate portion 21 is, for example, 40% or more, the aluminum deposition efficiency (electrolysis efficiency) during application of current can be appropriately maintained. The opening ratio of the curved plate portion 21 is defined as S0 on the inner wall surface 21b where the surface area of the granular aluminum 6 is formed, assuming that the through hole 21a is not open, and the opening area of the through hole 21a. Is a value obtained by S1 / S0 × 100 when S1 is S1.

  The surfaces of the curved plate portion 21 (the inner wall surface 21b and the outer wall surface 21c) are insoluble in the electric aluminum plating solution 3 irrespective of the electric insulation and the presence or absence of application of a current. Since the surface of the curved plate portion is electrically insulative and insoluble in the electroaluminum plating solution 3, dissolution of the curved plate portion 21 during application of current can be suppressed. The reaction with the electroaluminum plating solution 3 can be suppressed. The curved plate portion 21 is made of, for example, a member made of a resin material such as PEEK (polyetheretherketone) or PTFE (polytetrafluoroethylene), or an insulating coating metal material in which a metal surface such as stainless steel is coated with PTFE or the like. May be used.

  The housing 2 includes the above-mentioned curved plate portion 21, a lower plate portion 22 provided below the curved plate portion 21 as shown in FIG. 2, and two lower plate portions 22 connecting the curved plate portion 21 and the lower plate portion 22. It is composed of an upper plate 23 and two side plates 24. The lower plate portion 22 is configured to be parallel to the inner wall portion 21b of the curved plate portion 21. Note that the lower plate portion 22 may not be configured to be parallel to the inner wall portion 21b of the curved plate portion 21. For example, the space between the curved plate portion 21 and the inner wall surface 21b may be configured to gradually increase toward the downwardly convex bottom (lowest portion) of the lower plate portion 22.

  Further, for example, the lower plate portion 22 configured to be parallel to the downwardly convex curved plate portion 21 becomes downwardly convex. When the curved plate portion 21 and the lower plate portion 22 are convex downward, the housing 2 can have a downwardly convex arch-shaped cavity. The housing 2 having a downwardly convex arch-shaped cavity is preferable, and the plurality of granular aluminum 6 stored in the housing 2 is pressed by the inner wall surface 21b of the downwardly convex curved plate portion 21. And a state where the housing 2 is pushed toward the bottom (the lowermost part of the downwardly convex arch) along the downwardly protruding lower plate portion 22. In such a state, when the granular aluminum 6 constituting the surface area of the granular aluminum 6 abutting on the inner wall surface 21b of the curved plate portion 21 is reduced in size by melting, the reduced granular aluminum is reduced by its own weight to the bottom of the housing 2. (Cavity portion between the lowermost portion of the curved plate portion 21 and the lowermost portion of the lower plate portion 22) is easily settled, and another granular aluminum is easily moved by its own weight so as to fill a gap due to the settling.

  Each of the two upper plate portions 23 connects the curved plate portion 21 and the lower plate portion 22, and each of the two upper plate portions 23 is also connected to the two side plate portions 24. The two upper plate portions 23 are configured to be parallel to the liquid surface 3a of the electric aluminum plating layer 3, but need not be parallel to the liquid surface 3a. One of the two side plate portions 24 is provided on the front side in FIG. 2 and the other is provided on the back side in FIG. 2 in the rotation axis direction of the cathode drum 1. Each of the two side plate portions 24 connects the curved plate portion 21 and the lower plate portion 22, and each of the two side plate portions 24 is also connected to the two upper plate portions 23. With the housing 2 having the above configuration, a plurality of granular aluminum 6 can be stored in the housing 2. Note that the lower plate portion 22, the two upper plate portions 23, and the two side plate portions 24 that form the housing 2 together with the curved plate portion 21 can be made of a material having the same material as the curved plate portion 21.

  It is preferable that the casing 2 is formed as a single body without being divided into a plurality of parts in a direction along the side surface 1a of the cathode drum 1 (hereinafter, referred to as a circumferential direction of the cathode drum 1). Specifically, the curved plate portion 21, the lower plate portion 22, and the two side plate portions 24 constituting the housing 2 are each directed along the side surface 1a of the cathode drum 1 (hereinafter, referred to as the circumferential direction of the cathode drum 1). )), It is preferable to form a single body. Thereby, the housing 2 can have one cavity in which the plurality of granular aluminums 6 can be stored. For example, if two housings are arranged in parallel in the circumferential direction of the cathode drum 1, a relatively large discontinuous portion is formed between the two housings. Therefore, a relatively large discontinuous portion is formed between the surface area of the granular aluminum formed in one housing and the surface area of the granular aluminum formed in the other housing. If there is a relatively large discontinuity in the surface area of the granular aluminum facing the aluminum precipitation area, the precipitation of aluminum in the aluminum precipitation area corresponding to the discontinuity tends to be unstable. Therefore, as described above, it is preferable that the surface area of the granular aluminum 6 be continuously formed without a break by providing a single cavity in the housing 2 in the circumferential direction of the cathode drum 1. Since the surface area of the granular aluminum 6 is continuously formed in the circumferential direction of the cathode drum 1, aluminum can be continuously and continuously deposited in the aluminum deposition area.

  The anode device 20 has, for example, an electrode unit 7 as shown in FIG. 3 for applying a current to a plurality of granular aluminum 6 in the housing 2. The electrode portion 7 is configured to be in constant contact with the plurality of granular aluminum 6 in the housing 2. The electrode section 7 is connected to a power supply section (not shown) provided at an end of the two upper plate sections 23 located farther from the side surface 1a of the cathode drum 1, and is configured to be capable of supplying power. The electrode section 7 is hardly dissolved in the electroaluminum plating solution 3 when no current is applied, and can be constituted by a curved plate (see FIG. 3) made of aluminum or the like having good conductivity. By disposing the curved plate as described above, for example, along the inner wall surface of the lower plate portion 22 located in the housing 2, the electrode portion 7 constantly in contact with the plurality of granular aluminum 6 stored in the housing 2. Can function as The electrode portion made of aluminum (for example, A1050 specified in JIS) is preferable, and has solubility in the electroaluminum plating solution 3. However, even if the surface of the electrode portion is dissolved, it does not substantially affect the production of the aluminum foil. .

  The electrode section 7 in the anode device 20 is not limited to the above configuration. For example, the lower plate portion 22 itself constituting the housing 2 is formed using a curved plate made of aluminum or the like, which is hardly dissolved in the electroaluminum plating solution 3 when no current is applied and has good conductivity. Thereby, it can function as an electrode part which is always in contact with the plurality of granular aluminum 6 stored in the housing 2. In addition, a metal material having a good conductivity, such as a plate, a rod, or a sphere, is disposed as a terminal portion or a connection plate portion so as to be always in contact with the plurality of granular aluminum 6 stored in the housing 2 so that the anode It is also possible to function as an electrode part in the device. The electrode portion is preferably located below a plurality of granular aluminum 6 farther from the aluminum deposition region of the cathode drum 1 as in the electrode portion 7 shown in FIG. 6 is preferentially dissolved.

  The anode device 20 has, for example, a particle feeding section 2a as shown in FIG. The particle feeding section 2a is configured to be able to feed the granular aluminum 6 into the housing 2 before applying the current or at the appropriate time during the application of the current. While the current is being applied, the granular aluminum 6 abuts on the inner wall surface 21b of the curved plate portion 21 and faces the region Sc (see FIGS. 4 and 5) where aluminum is actually deposited in the aluminum deposition region of the cathode drum 1. The plurality of granular aluminums 6 constituting the surface region Sa (see FIGS. 4 and 5) dissolve and become small. The small-grained granular aluminum 6 gradually moves toward the bottom in the housing 2 by its own weight and stirring. As a result, the volume of the entire granular aluminum 6 stored in the housing 2 is reduced, and a space 2s as shown in FIG.

  When the space 2s is formed in the housing 2, the surface area Sa of the granular aluminum 6 becomes small as shown in FIG. 5, and the area Sc where aluminum is actually deposited in the aluminum deposition area opposed thereto is shown in FIG. Become smaller. As a result, aluminum is deposited only on a part (region Sc shown in FIG. 5) of the aluminum deposition region of the cathode drum 1 immersed in the electroaluminum plating solution 3, which may hinder production of aluminum foil. There is. Therefore, it is preferable that the plurality of granular aluminums 6 are in contact with the entire inner wall surface 21b of the curved plate portion 21 so that the space 2s does not occur in the housing 2. If the space 2s in the housing 2 becomes excessively large, the aluminum deposition efficiency (electrolysis efficiency) may be reduced. Therefore, the liquid level 3a at the uppermost position of the granular aluminum 6 in the housing 2 may be reduced. It is preferable that the distance is 30 mm or less.

  Here, as shown in FIG. 4, the aluminum deposition region formed as a cathode on the side surface 1 a of the cathode drum 1 is fixed to a surface region Sa of the granular aluminum 6 functioning as an anode (see a portion surrounded by a dotted line). It is configured to be at intervals. The surface region Sa of the granular aluminum 6 is opposed to a region Sc (see a portion surrounded by a dotted line) in which aluminum is actually deposited in the aluminum deposition region. As the surface area Sa of the granular aluminum 6 facing the aluminum deposition area is larger, the area Sc where aluminum is actually deposited in the aluminum deposition area becomes larger. For example, as shown in FIG. 4, when the plurality of granular aluminum 6 is filled in the housing 2, the surface area Sa of the granular aluminum 6 configured to contact the inner wall surface 21 b of the curved plate portion 21. Is largest, the portion facing the aluminum deposition region is the largest, and the region Sc where aluminum is actually deposited can be maximized. As a result, the area of the aluminum film 10a (aluminum foil 10) formed corresponding to the region Sc where aluminum is actually deposited can be maximized.

  Therefore, while the current is being applied, the storage state of the granular aluminum 6 in the housing 2 is preferably a full state (see FIG. 4), and no space 2s (see FIG. 5) is generated in the housing 2. As described above, even if the space 2s is generated, it is preferable that the granular aluminum 6 be replenished at appropriate times so as to fill the space 2s. In addition, the more the granular aluminum 6 in the housing 2 is in the storage state closer to the full state, the more the weight of the granular aluminum 6 acts, so that the reliable contact state between the granular aluminum 6 is easily maintained, and the curved plate The contact state of the granular aluminum 6 against the inner wall surface 21b of the portion 21 is easily maintained. The feeding of the granular aluminum 6 into the housing 2 is preferably performed in a timely manner. The storage state of the granular aluminum 6 in the housing 2 can be maintained at a predetermined state. Can be made uniform (the half width of the particle size distribution can be reduced), which contributes to suppressing a decrease in aluminum deposition efficiency (electrolysis efficiency).

  Therefore, the anode device 20 is provided with a particle feeding section 2 a for feeding the granular aluminum 6 into the housing 2. For example, the anode device 20 shown in FIG. 2 has a particle feeding section 2a provided on the upper plate 23, and a particle supply device 5 provided above the particle feeding section 2a. In the anode device 20, as shown in FIG. 2, by locating the particle feeding section 2a and the particle supply device 5 at the uppermost part of the housing 2, the own weight of the granular aluminum 6 can be sufficiently utilized. Thereby, the granular aluminum 6 can be easily and reliably fed into the housing 2 from the particle supply device 5 via the particle feeding section 2a.

  It is preferable that the granular aluminum 6 is fed to the inside of the particle sending portion 2a located above the upper plate portion 23 of the housing 2, and the storage state of the granular aluminum 6 in the housing 2 is always filled. Can be held. In the foil making apparatus 100 shown in FIG. 1, the opening to the upper plate portion 23 of the particle inlet 2a is located below the liquid surface 3a because the upper plate portion 23 is located below the liquid surface 3a. When the plate portion 23 is located on the liquid level 3a, it may be located on the liquid level 3a.

  The anode device 20 has a stirring unit 2b that stirs the granular aluminum 6 in the housing 2. The stirring unit 2b may have a configuration having two stirring shafts as shown in FIG. 2, for example. The stirring shaft of the stirring section 2b is a shaft-like member whose both ends are supported by the side plate section 24 of the housing 2 so as to be able to rotate and swing. The stirring shaft is configured to have a hexagonal cross-sectional (cross-sectional) outer edge when viewed from the axial direction. The two stirring shafts are provided at positions where the cavities in the housing 2 are equally divided. The two agitating shafts can be rotated or rocked before and during the application of the current at appropriate times.

  When a current is applied, the plurality of granular aluminum 6 constituting the surface region Sa (see FIG. 4) of the granular aluminum 6 gradually melts and becomes small. When the granular aluminum 6 is reduced in particle size, the surface area of the granular aluminum 6 is reduced by the reduced amount. When the amount of the granular aluminum 6 reduced in the surface region Sa of the granular aluminum 6 increases, there is a possibility that an electrical contact formed by a plurality of the granular aluminum 6 contacting each other becomes unstable. If electrical contacts become unstable in the surface region Sa of the granular aluminum 6, precipitation of aluminum becomes uneasy. Therefore, the granular aluminum 6 in the housing 2 may be appropriately stirred by the stirring unit 2b, and the plurality of granular aluminum 6 may be appropriately moved, and the surface area Sa of the granular aluminum 6 may be reconfigured. Further, when the granular aluminum 6 in the housing 2 is agitated, the granular aluminum 6 collides with and rubs against each other, so that there is also an effect (self-dressing) of removing a sludge film formed on the surface of the granular aluminum 6 by applying an electric current. .

  The stirring shaft of the stirring section 2b may be the above-mentioned hexagonal column-shaped shaft, but may be, for example, a screw-shaped shaft, a polygonal column-shaped shaft other than a hexagonal column-shaped shaft, or a bladed shaft. The cross section of the stirring shaft of the stirring section 2b may be polygonal, such as the above-mentioned hexagon, or impeller-like. The shape and size of the stirring shaft of the stirring unit 2b can be selected according to the shape and size of the granular aluminum 6, the degree of storage in the housing 2, and the like.

  The surface of the stirring shaft of the stirring section 2b has electric insulation properties and is insoluble in the electric aluminum plating solution 3 regardless of whether or not a current is applied. Thereby, the dissolution of the stirring shaft of the stirring section 2b and the reaction with the electric aluminum plating solution 3 during the application of the current can be suppressed. The stirring shaft of the stirring section 2b may be made of, for example, a resin material such as PEEK (polyetheretherketone) or PTFE (polytetrafluoroethylene), and a metal surface such as stainless steel is coated with PTFE or the like. It may be constituted by the insulated metal coating material.

  The anode device 20 has a particle discharge unit 2c that discharges the small-sized granular aluminum 6 in the housing 2. If an excessively large opening is provided in the lower plate portion 22 of the housing 2 located below the cathode drum 1, when current is applied, wraparound occurs and aluminum deposition efficiency (electrolysis efficiency) is greatly reduced. is there. Therefore, as shown in FIG. 3, for example, the particle discharging portion 2c is preferably configured by a plurality of through holes provided at the lowermost portion of the lower plate portion 22 serving as the bottom portion of the housing 2 and projecting downward. The plurality of through-holes forming the particle discharge portion 2c are configured to allow the passage of the small-grained granular aluminum 6 which has moved to the lowermost position in the housing 2 by its own weight or stirring. The granular aluminum 6 reduced in size in the casing 2 moves downward by its own weight or agitation, and eventually moves to the bottom (the lowermost part of the downwardly protruding lower plate 22) in the casing 2. The granular aluminum 6 having a small surface area due to the reduction in grain size hinders the configuration of the electrical contact, and the granular aluminum 6 having an excessively small particle size (for example, the equivalent circle diameter is less than 2 mm) has a large buoyancy and has a large buoyancy. It may float inside and destabilize the deposition of aluminum. Therefore, it is preferable to discharge the small-sized granular aluminum 6 to the outside of the housing 2 from the particle discharging portion 2c. The plurality of through holes provided at the lowermost portion of the lower plate portion 22 which are downwardly convex are preferably provided in the entire width of the housing 2 along the rotation axis direction of the cathode drum 1, and discharge of the small-sized granular aluminum 6 is performed by the cathode drum. 1 can be performed over the entire width of the housing 2 along the rotation axis direction. The small-sized granular aluminum 6 discharged through the plurality of through holes of the particle discharging portion 2c and discharged to the outside of the housing 2 may be collected by providing a filter in a circulation path of the electric aluminum plating solution 3 or the like. Can be.

  The anode device 20 stores a plurality of granular aluminum 6 that is an anode metal in the housing 2. The granular aluminum 6 is preferably composed of 97% by mass or more of Al (element) because the amount of impurities is preferably smaller from the viewpoint of stabilizing the precipitation of aluminum and improving the quality of the aluminum foil 10. The granular aluminum 6 includes elements such as S, C, Cl, and O derived from the electroaluminum plating solution 3 and elements such as Ti, Fe, Ni, and Si derived from members constituting the foil making apparatus 100 in addition to Al. There is a possibility that an element such as Cu derived from a lead material used for stripping the aluminum film 10a is included as an impurity. The granular aluminum 6 is preferably not aluminum particles that are excessively fine but spherical aluminum or massive aluminum. It is preferable to use spherical aluminum for the granular aluminum 6, so that the flow of the granular aluminum 6 in the housing 2 becomes smooth, and electrical contacts formed by mutual contact are easily stabilized. As a result, the electric field generated in the surface region of the granular aluminum 6 constituted by the plurality of granular aluminums 6 abutting on the inner wall surface 21b of the curved plate portion 21 is easily equalized.

  It is preferable that the granular aluminum 6 has an equivalent circle diameter (outer diameter in the case of spherical aluminum) of 2 mm or more and 30 mm or less. When the granular aluminum 6 has an equivalent circle diameter (outer diameter in the case of spherical aluminum) of 2 mm or more and 30 mm or less, it can be formed in a surface region of the granular aluminum 6 having a preferable surface area to function as an anode. The filling rate (bulk density) of the granular aluminum 6 stored in the housing 2 while facilitating the feeding of the granular aluminum 6 into the housing 2 and the stirring of the granular aluminum 6 in the housing 2 are facilitated. Can be increased. Moreover, since the surface area of spherical aluminum changes synergistically with respect to the outer diameter, the larger the outer diameter is, the more the amount of aluminum ions released into the electroaluminum plating solution 3 can be increased. The size of the granular aluminum 6 is preferably set according to the diameter of the side surface 1a of the right cylindrical body of the cathode drum 1. When the diameter of the side surface 1a is larger, the larger granular aluminum 6 is selected. Is smaller, it is preferable to select a smaller granular aluminum 6.

  As shown in FIG. 1, the foil making apparatus 100 has an electrolytic tank 4 for storing an electroaluminum plating solution 3. The electrolytic cell 4 is configured such that the inner surface thereof is insoluble in the electroaluminum plating solution 3 while a current is being applied, so that a predetermined amount of the electroaluminum plating solution 3 can be stored. In the electrolytic cell 4, a non-aqueous gas (for example, a nitrogen gas having a dew point of −40 ° C. or less) is supplied to a space 3b on the liquid level 3a of the electroaluminum plating solution 3, and is maintained in a non-aqueous atmosphere. In the electrolytic cell 4, the inner wall surface 21 b of the curved plate portion 21 of the casing 2 of the anode device 20 is fixed below the liquid surface 3 a of the electric aluminum plating solution 3 with respect to the side surface 1 a of the right cylindrical body of the cathode drum 1. They are arranged at intervals.

  The electroaluminum plating solution 3 is a non-aqueous liquid from which aluminum can be deposited by applying a current under predetermined conditions. The electroaluminum plating solution 3 is, for example, a non-aqueous liquid containing dialkyl sulfone as a non-aqueous solvent, aluminum halide as a solute, and an appropriate amount of a nitrogen-containing compound as an additive. More specifically, the electroaluminum plating solution 3 mixes anhydrous aluminum chloride in the range of 1.5 to 4.5 mol with respect to 10 mol of dimethyl sulfone, and ammonium chloride in the range of 0.05 to 2.0 mol. These are non-aqueous liquids blended in the formula (1), and the amount of each can be adjusted as needed. The composition of the electric aluminum plating solution 3 is obtained by analyzing a newly prepared electric aluminum plating solution 3. In this case, for example, anhydrous aluminum chloride is preferably blended in the range of 1.5 to 4.5 mol, preferably 1.5 to 4.2 mol, more preferably 1.5 to 4.0 mol, and still more. Preferably, it is good to mix in the range of 1.5 to 3.8 mol.

  The above-mentioned dialkyl sulfone may be selected from, for example, linear or branched ones having 1 to 6 carbon atoms in the alkyl group, such as dimethyl sulfone, diethyl sulfone, dipropyl sulfone, dihexyl sulfone and methyl ethyl sulfone. Can be.

  The above aluminum halide can be selected from, for example, aluminum chloride, anhydrous aluminum chloride, aluminum bromide and the like. The aluminum halide is preferably an anhydride (e.g., anhydrous aluminum chloride) in order to minimize the amount of water in the conductive liquid 3, which is a factor inhibiting aluminum deposition.

Examples of the nitrogen-containing compound include an ammonium halide, a hydrogen halide of a primary amine, a hydrogen halide of a secondary amine, a hydrogen halide of a tertiary amine, and the same or different alkyl group represented by R ¹ ~R shown in ^4, the general formula when represents a counter anion to quaternary ammonium cations ^X: from such quaternary ammonium salts represented by ^{R 1 R 2 R 3 R 4} N · X, 1 or one or more Can be selected. More specifically, for example, it can be selected from monomethylamine hydrochloride, dimethylamine hydrochloride, trimethylamine (TMA) hydrochloride, ammonium chloride (NH ₄ Cl), and the like.

  The aluminum foil 10 can be manufactured using the foil making apparatus 100 on which the anode device 20 is mounted. Specifically, the foil-making apparatus 100 is started, and an aluminum deposition region configured as a cathode on the side surface 1a of the cathode drum 1 and a surface region of the granular aluminum 6 configured to function as an anode of the anode device 20 (FIG. And a cathode drum 1 is rotated in one direction at a predetermined rotation speed. As a result, in the aluminum deposition region of the cathode drum 1, aluminum starts to precipitate in a region immersed in the electroaluminum plating solution 3 (region Sc shown in FIG. 4). While this region Sc moves along the side surface 1a with the rotation of the cathode drum 1, aluminum continues to be deposited in the region Sc while being immersed in the electroaluminum plating solution 3, and aluminum having a predetermined thickness (for example, 10 μm) is formed. The film grows on the film 10a and is pulled up on the liquid level 3a by the rotation of the cathode drum 1. The aluminum film 10a having a predetermined thickness (for example, 10 μm) is peeled off from the side surface 1a of the cathode drum 1 by, for example, winding the aluminum film 10a pulled up on the liquid surface 3a by connecting a lead material to the tip thereof. Can be obtained. Thereafter, the aluminum foil 10 can be subjected to a washing treatment to remove the electroaluminum plating solution 3 from its surface, and a drying treatment to appropriately dry the surface of the aluminum foil 10.

  As described above, the anode device (anode device 20) according to the present invention includes the timely feeding of the granular aluminum 6 into the housing 2, the timely stirring of the granular aluminum 6 in the housing 2, and the housing. 2. A plurality of granular aluminum 6 abuts on the inner wall surface 21b of the downwardly convex curved plate portion 21 by allowing the timely discharge of the small-sized granular aluminum 6 out of the housing 2. Is always kept constant. Accordingly, when current is continuously applied to manufacture the aluminum foil 10 using the electroaluminum plating solution 3, the granular shape capable of functioning as an anode by the inner wall surface 21 b of the curved plate portion 21 that is convex downwardly facing the housing 2. It is possible to maintain the surface area of the aluminum 6 in a certain form.

  Therefore, in the aluminum foil manufacturing apparatus (foil making apparatus 100) equipped with the anode apparatus (anode apparatus 20) according to the present invention, before the current is applied, the aluminum deposition region configured as the cathode has a rectangular column shape. The surface area of the granular aluminum 6, which is retained by the side surface 1a and can function as an anode, is retained by the inner wall surface 21b of the curved plate portion 21 which is downwardly convex, and the inner wall surface 21b of the curved plate portion 21 is formed by the aluminum deposition region. Can be kept at a constant interval. Similarly, when the current is continuously applied, the aluminum deposition region configured as the cathode is held by the side surface 1a of the right cylindrical body, and the surface region of the granular aluminum 6 that can function as the anode faces downward of the housing 2. The inner wall surface 21b of the curved plate portion 21 is held by the inner wall surface 21b of the convex curved plate portion 21, and the inner wall surface 21b of the curved plate portion 21 can be kept at a constant distance from the aluminum deposition region.

  In addition, by applying the method for manufacturing an aluminum foil using an aluminum foil manufacturing apparatus (foil making apparatus 100) equipped with the anode apparatus (anode apparatus 20) according to the present invention, the shapes of the curved surfaces of the cathode and the anode are formed. And the uniformity of the separation distance between the cathode and the anode is maintained, so that the aluminum foil 10 having a uniform thickness in the longitudinal direction (for example, 10 μm) can be manufactured. As a result, the present invention can contribute to the practical use of an aluminum foil having a smaller thickness (for example, 10 μm or less) that can cope with an increase in the density of a power storage device.

1. Cathode device, 1a. Side view 2. Housing, 2a. Particle inlet, 2b. Stirring section, 2c. Particle outlet, 2s. Space 3. Electroaluminum plating solution, 3a. Liquid level, 3b. Space 4. Electrolysis tank 5. Particle supply device 6. 6. Granular aluminum Electrode section 10. Aluminum foil, 10a. Aluminum film 20. Anode device 21. Curved plate portion, 21a. Through hole, 21b. Inner wall surface, 21c. Outer wall surface 22. Lower plate part 23. Upper plate 24. Side plate 100. Foil making device Sa. Area (anode side)
Sc. Area (cathode side)
A. Arrow indicating the direction of rotation of the cathode drum B. B. Arrow indicating the feeding direction of aluminum foil D. Arrow indicating supply of circulating electric aluminum plating solution E. Arrow indicating discharge of circulating electroaluminum plating solution Arrow indicating the rotation direction of the stirring shaft

Claims (6)

An anode device for producing an aluminum foil using together with a cathode device having an aluminum deposition region configured as a cathode on the side surface of a right cylinder having a rotation axis,
The anode device includes a housing configured to be disposed below the right cylindrical body and configured to store a plurality of granular aluminum, an electrode unit configured to apply a current to the plurality of granular aluminum in the housing, and the housing includes: A particle feeding unit for feeding granular aluminum into the body, a stirring unit for stirring the granular aluminum in the housing, and a particle discharging unit for discharging the granular aluminum reduced in the housing,
The housing has a downwardly convex curved plate portion provided with a plurality of through holes,
The curved plate portion has an inner wall surface in which the plurality of granular aluminum contacts in the housing,
The anode device, wherein an outer edge of a cross section of the inner wall surface facing the aluminum deposition region as viewed from the direction of the rotation axis is configured to have a constant interval with respect to the side surface of the right cylindrical body.   The anode device according to claim 1, wherein the curved plate portion has an outer wall surface that forms the outer surface of the housing, and the outer wall surface is configured to be parallel to the inner wall surface. A cathode device having an aluminum deposition region configured as a cathode on a side surface of a right circular cylinder having a rotation axis,
An anode device for storing a plurality of granular aluminum configured as an anode in a housing arranged below the right circular cylinder,
Having an electrolytic tank for storing an electroaluminum plating solution,
The anode device, the housing, an electrode unit that applies a current to the plurality of granular aluminum in the housing, a particle sending unit that sends the granular aluminum into the housing, the granular aluminum in the housing A stirrer for stirring, and a particle discharger for discharging the granular aluminum reduced in the housing,
The housing has a downwardly convex curved plate portion provided with a plurality of through holes,
The curved plate portion has an inner wall surface in which the plurality of granular aluminum contacts in the housing,
The cross-sectional outer edge of the inner wall surface facing the aluminum deposition region viewed from the direction of the rotation axis is configured to be at a constant interval with respect to the side surface of the right circular cylinder,
In the electroaluminum plating solution, with a part of the aluminum deposition region and the housing immersed, while applying a current between the aluminum deposition region and the plurality of granular aluminum in the housing, By rotating the right columnar body in one direction, aluminum is deposited in the aluminum deposition region to form an aluminum film, and the aluminum film rising from the liquid surface of the electroaluminum plating solution is peeled from the aluminum deposition region. An aluminum foil manufacturing device configured to obtain an aluminum foil.   The aluminum foil manufacturing apparatus according to claim 3, wherein the curved plate portion has an outer wall surface that forms the outer surface of the housing, and the outer wall surface is configured to be parallel to the inner wall surface. A cathode device having an aluminum deposition region configured as a cathode on a side surface of a right circular cylinder having a rotation axis,
An anode device for storing a plurality of granular aluminum configured as an anode in a housing arranged below the right circular cylinder,
And an electrolytic tank for storing an electroaluminum plating solution, and
The anode device, the housing, an electrode unit that applies a current to the plurality of granular aluminum in the housing, a particle sending unit that sends the granular aluminum into the housing, the granular aluminum in the housing A stirrer for stirring, and a particle discharger for discharging the granular aluminum reduced in the housing,
The housing has a downwardly convex curved plate portion provided with a plurality of through holes,
The curved plate portion has an inner wall surface in which the plurality of granular aluminum contacts in the housing,
The outer edge of the cross section of the inner wall surface facing the aluminum deposition region viewed from the direction of the rotation axis is configured so as to be at a constant interval with respect to the side surface of the right cylindrical body,
In the electroaluminum plating solution, with a part of the aluminum deposition region and the housing immersed, while applying a current between the aluminum deposition region and the plurality of granular aluminum in the housing, By rotating the right columnar body in one direction, aluminum is deposited in the aluminum deposition region to form an aluminum film, and the aluminum film rising from the liquid surface of the electroaluminum plating solution is peeled from the aluminum deposition region. A method for producing an aluminum foil, which forms the aluminum foil.   The method for manufacturing an aluminum foil according to claim 5, wherein the curved plate portion has an outer wall surface that forms the outer surface of the housing, and the outer wall surface is configured to be parallel to the inner wall surface.