JP2020004697A - All-solid battery, resin coating device, and manufacturing method for all-solid battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress a short circuit and a slippage at an end portion of an all solid state battery. A third active material layer, a first solid electrolyte layer, a first active material layer, a first current collector layer, a second active material layer, a second solid electrolyte layer, and a fourth active material layer. An active material layer is provided in this order, and the first active material layer and the second active material layer are either the negative electrode active material layer or the positive electrode active material layer. When the second active material layer is a negative electrode active material layer, the third active material layer and the fourth active material layer are positive electrode active material layers, and the first active material layer and the second active material layer are positive electrodes. When it is an active material layer, the third active material layer and the fourth active material layer are negative electrode active material layers, and at least the first current collector layer is the third active material layer and the fourth active material layer. The extension portion is formed by extending to the outside of the layer, and the insulating resin layer is continuously formed on the one side surface of the extension portion, the side surface of the extension portion, and the other side surface of the extension portion. Provided as an all-solid-state battery. [Selection diagram] Figure 2

Description

  The present application discloses an all solid state battery and the like.

  As disclosed in Patent Document 1, in an all-solid-state battery in which the area of the negative electrode is larger than the area of the positive electrode, an insulating resin is provided in a gap between the battery ends to prevent breakage and insulation at the battery end. There is known a technique of arranging them so as to sandwich them. Further, as disclosed in Patent Literature 2, a technique is known in which the periphery of a battery element of an all-solid-state battery is covered with a sealing layer.

JP 2015-162353 A JP 2014-098842 A

  Patent Literature 1 does not disclose a specific means for disposing an insulating resin in a gap between battery ends. In view of the well-known technology, for example, it is conceivable to apply a resin to the gap at the end of the battery using a dispenser or the like. In this case, it is necessary to bring the nozzle close to the electrode. However, since the all-solid-state battery has warpage or undulation due to being densely pressed, the nozzle may come into contact with the electrode and damage the electrode. . Alternatively, it is conceivable to apply a resin to the gap at the end of the battery using a spray or the like. However, in this case, it is difficult to accurately apply the resin to the inside of the gap between the electrode ends and to appropriately insulate the ends. Alternatively, as disclosed in Patent Document 2, after the all-solid-state battery is housed in the battery case, a thermosetting resin is filled in the battery case, and the resin is arranged at the end of the all-solid-state battery. However, also in this case, it is difficult to accurately arrange the resin even inside the gap between the electrode ends.

  In the all-solid-state battery disclosed in Patent Literature 1, an active material layer or the like is exposed at an end of the battery, and a short circuit or slipping may occur at the end of the battery (see FIG. 4A). ). In an all-solid-state battery, a positive electrode current collector tab connected to a positive electrode current collector layer and a negative electrode current collector tab connected to a negative electrode current collector layer may protrude from the side of the battery. In the all-solid-state battery disclosed in Patent Document 1, for example, when the positive electrode current collector tab is projected from the positive electrode current collector layer, the positive electrode current collector tab is a negative electrode active material layer, a solid electrolyte layer or a negative electrode current collector layer and Contact may cause short-circuiting or slipping at the end of the battery.

  The present application provides, as one of means for solving the above problems, a first current collector layer, a first active material layer laminated on one surface of the first current collector layer, A second active material layer laminated on the other surface of the first current collector layer; a first solid electrolyte layer laminated on one surface of the first active material layer; A second solid electrolyte layer laminated on the other surface of the active material layer, a third active material layer laminated on one surface of the first solid electrolyte layer, and a second solid electrolyte layer. A fourth active material layer laminated on the other surface, a second current collector layer laminated on one surface of the third active material layer, and another surface of the fourth active material layer A third current collector layer laminated on the first active material layer and the first active material layer and the second active material layer, wherein one of the negative electrode active material layer and the positive electrode active material layer In the case where the first active material layer and the second active material layer are negative electrode active material layers, the third active material layer and the fourth active material layer are positive electrode active material layers, When the first active material layer and the second active material layer are positive electrode active material layers, the third active material layer and the fourth active material layer are negative electrode active material layers, and Current collector layer extends outside the third active material layer and the fourth active material layer to form an extended portion, and one side surface of the extended portion, Disclosed is an all-solid-state battery in which an insulating resin layer is continuously provided over a side surface of the portion and the other surface of the extension portion.

  In the all-solid-state battery of the present disclosure, one surface of the insulating resin layer is on the other side with respect to one surface of the third active material layer, and the other surface of the insulating resin layer is The active material layer of No. 4 may be present on one side with respect to the other surface.

  In the all solid state battery of the present disclosure, the insulating resin layer may be present only between the second current collector layer and the third current collector layer.

  In the all-solid-state battery according to the present disclosure, at least the first current collector layer, the first active material layer, and the second active material layer include the third active material layer and the fourth active material layer. The extension may extend further outward than the outside.

  In the all-solid-state battery according to the present disclosure, the first current collector layer, the first active material layer, the second active material layer, the first solid electrolyte layer, and the second solid electrolyte layer are formed of the second solid electrolyte layer. The third active material layer and the fourth active material layer may extend outside to form the extension.

  In the all solid state battery of the present disclosure, the insulating resin layer is continuous over one surface of the first solid electrolyte layer, the side surface of the extending portion, and the other surface of the second solid electrolyte layer. May be provided.

  The present application, as one of means for solving the above problems, a pair of transfer rings arranged so that transfer surfaces are opposed to each other with a gap, and an ultraviolet curable resin on the transfer surface of each of the transfer rings A resin supply source for supplying, and at least one ultraviolet light source for supplying ultraviolet light to at least the gap, configured so that an end portion of the transferred body is disposed in the gap, The ultraviolet curable resin supplied to the transfer surface of the transfer ring is simultaneously moved from the transfer surface to one side surface, side surface, and the other side surface of the end of the object to be transferred with the rotation of the transfer ring. The transferred ultraviolet curable resin is cured by ultraviolet light from the ultraviolet light source, and is continuously formed on one side surface, the side surface and the other side surface of the end of the transfer object. Resin layer is configured to be continuously provided, discloses a resin coating device.

  In the resin coating device of the present disclosure, the transfer ring may have an ultraviolet transmission property, and may be configured such that ultraviolet light emitted from the ultraviolet light source passes through the transfer ring and reaches the gap. .

  The resin coating device according to the present disclosure further includes a reflecting mirror inside the transfer surface, the reflecting mirror reflecting ultraviolet light from the ultraviolet light source. The ultraviolet light emitted from the ultraviolet light source is reflected by the reflecting mirror, and the transfer is performed. It may be configured to penetrate a ring and reach the gap.

  In the resin coating device of the present disclosure, the reflecting mirror may be provided continuously on the inner side of the transfer surface on a concentric circle with the transfer ring.

  In the resin coating device of the present disclosure, a plurality of the ultraviolet light sources are provided, and ultraviolet light emitted from a part of the ultraviolet light sources passes through the transfer ring and reaches a portion of the transfer surface other than the gap. The ultraviolet curable resin supplied to the transfer surface from the resin supply source, by ultraviolet rays from a part of the ultraviolet light source, before reaching the gap, preliminary on the transfer surface It may be configured to be cured.

  In the resin coating device of the present disclosure, the wavelength of ultraviolet light emitted from some of the ultraviolet light sources may be different from the wavelength of ultraviolet light emitted from other ultraviolet light sources.

  In the resin coating device of the present disclosure, the ultraviolet curable resin may be a material that is cured by irradiating at least two wavelengths or more of ultraviolet light.

  In the resin coating device of the present disclosure, the transfer surface may be made of polytetrafluoroethylene or silicon.

  In the resin coating device of the present disclosure, the ultraviolet curable resin may include a filler.

  In the resin coating device of the present disclosure, a roller may be provided downstream of the transfer ring to assist in the separation of the transfer target from the transfer surface.

  In the resin coating device of the present disclosure, a separating mechanism for increasing or decreasing the gap may be provided.

  In the resin coating device of the present disclosure, a notch may be provided in at least one of the pair of transfer rings.

  In the resin coating device of the present disclosure, the transfer ring has a conveyor belt on the surface, the surface of the conveyor belt is the transfer surface, and the surface of the conveyor belt is higher than the surface of the end portion of the object to be transferred. May be made of a material having excellent releasability from the ultraviolet curable resin.

  As one of means for solving the above-mentioned problems, the present application has a structure in which a first active material layer is laminated on one surface of a first current collector layer, and a first active material layer is formed on the other surface of the first current collector layer. A second active material layer is laminated, a first solid electrolyte layer is laminated on one surface of the first active material layer, and a second solid electrolyte layer is laminated on the other surface of the second active material layer. Are stacked, a third active material layer is stacked on one surface of the first solid electrolyte layer, and a fourth active material layer is stacked on the other surface of the second solid electrolyte layer. The first active material layer and the second active material layer may be any one of a negative electrode active material layer and a positive electrode active material layer, and the first active material layer and the second active material layer may be used as a negative electrode active material layer. In the case of a material layer, the third active material layer and the fourth active material layer are used as positive electrode active material layers, and the first active material layer and the second active material layer are used as positive electrodes. In the case of a material layer, the third active material layer and the fourth active material layer are used as a negative electrode active material layer, and at least the first active material layer and the second active material layer are used as the third active material layer. Extending outside the material layer and the fourth active material layer to form an extension, and extending over one surface of the extension, the side surface of the extension, and the other surface of the extension. An ultraviolet curable resin is continuously provided by transfer, and the ultraviolet curable resin transferred to the extending portion is irradiated with ultraviolet light, and the ultraviolet curable resin is cured to form an insulating resin layer, and the insulating resin layer is provided on the extending portion. Is provided, a second current collector layer is laminated on one surface of the third active material layer, and a third current collector layer is laminated on the other surface of the fourth active material layer. A method for manufacturing an all-solid-state battery is disclosed.

  According to the all-solid-state battery of the present disclosure, short-circuiting and sliding down at the battery end can be suppressed.

  According to the resin coating device of the present disclosure, by simultaneously transferring the resin to one surface, side surface, and the other surface of the end of the transfer target using the pair of transfer rings, damage to the end of the transfer target can be prevented. The insulating resin layer can be provided in a precise amount at a precise position at an end of the transfer object while avoiding the problem.

  According to the method for manufacturing an all-solid battery of the present disclosure, the resin is transferred to the one surface, the side surface, and the other surface of the extended portion of the all-solid battery, thereby avoiding damage to the extended portion, The insulating resin layer can be provided in an accurate amount at an accurate position of the protrusion. In addition, by providing the second current collector layer and the third current collector layer after providing the insulating resin layer on the extension portion, short-circuiting and slipping at the battery end can be suppressed.

FIG. 2 is a diagram schematically illustrating a part of the all-solid-state battery 100. FIG. 2 is a diagram schematically illustrating a configuration of a cross section taken along line II-II of FIG. 1. In FIG. 2 (B), a part of the configuration is shown by a thin dotted line for explanation of the extension part 40. FIG. 4 is a diagram schematically illustrating an example of a positional relationship between an insulating resin layer 50 and a third active material layer 23 and a positional relationship between the insulating resin layer 50 and a fourth active material layer 24. FIG. 9 is a schematic diagram for explaining an effect of the all-solid-state battery 100 with respect to the related art. FIG. 2 is a diagram schematically showing a configuration of a resin coating device 200. It is assumed that the transfer target X is conveyed from the front to the back of the paper. FIG. 2 is a diagram schematically showing a configuration of a resin coating device 200. It is assumed that the transfer target X is conveyed from left to right on the paper. FIG. 2 is a diagram schematically illustrating an example of an arrangement of an ultraviolet light source 130 in the resin coating device 200. It is assumed that the transfer target X is conveyed from the front to the back of the paper. FIG. 4 is a diagram schematically showing another example of the arrangement of the ultraviolet light sources 130 in the resin coating device 200. It is assumed that the transfer target X is conveyed from left to right on the paper. FIG. 3 is a schematic diagram for describing preliminary curing of an ultraviolet curable resin 121 on a transfer surface 110a of a transfer ring 110. FIG. 2 is a diagram schematically showing a configuration of a resin coating device 300. It is assumed that the transfer target X is conveyed from the front to the back of the paper. FIG. 3 is a schematic diagram for explaining an arrangement of a reflecting mirror and an ultraviolet light source in a resin coating device 300. It is assumed that the transfer target X is conveyed from right to left on the paper. FIG. 3 is a diagram schematically showing a configuration of a resin coating device 400. It is assumed that the transfer target X is conveyed from left to right on the paper. FIG. 4 is a schematic diagram for describing an example of a method for manufacturing an all-solid-state battery 100.

1. All solid state battery 100
1 and 2 schematically show a configuration of the all-solid-state battery 100. FIG. FIG. 1 schematically shows a part of an all solid state battery 100. In FIG. 1, the laminating direction of each layer coincides with the direction toward the back of the paper. FIGS. 2A and 2B schematically show the configuration of a cross section taken along line II-II of FIG. In FIG. 2 (B), a part of the configuration is shown by a thin dotted line for explanation of the extension part 40.

  As shown in FIGS. 1 and 2, the all-solid-state battery 100 includes a first current collector layer 11 and a first active material layer 21 stacked on one surface of the first current collector layer 11. A second active material layer 22 laminated on the other surface of the first current collector layer 11; and a first solid electrolyte layer laminated on one surface of the first active material layer 21 31, a second solid electrolyte layer 32 laminated on the other surface of the second active material layer 22, and a third active material layer laminated on one surface of the first solid electrolyte layer 31 23, a fourth active material layer 24 laminated on the other surface of the second solid electrolyte layer 32, and a second current collector laminated on one surface of the third active material layer 23 And a third current collector layer 13 laminated on the other surface of the fourth active material layer 24. In the all-solid-state battery 100, the first active material layer 21 and the second active material layer 22 are one of a negative electrode active material layer and a positive electrode active material layer, and the first active material layer When the first active material layer 21 and the second active material layer 22 are negative electrode active material layers, the third active material layer 23 and the fourth active material layer 24 are positive electrode active material layers, and the first active material layer When the layer 21 and the second active material layer 22 are positive electrode active material layers, the third active material layer 23 and the fourth active material layer 24 are negative electrode active material layers. As shown in FIG. 2, in the all-solid-state battery 100, at least the first current collector layer 11 extends outward from the third active material layer 23 and the fourth active material layer 24. The extension part 40 is constituted. Further, as shown in FIG. 2, in the all-solid-state battery 100, the insulation is provided on one surface 40a of the extension portion 40, the side surface 40b of the extension portion, and the other surface 40c of the extension portion. The resin layer 50 is provided continuously.

1.1. First Current Collector Layer The first current collector layer 11 may be made of a metal foil, a metal mesh, or the like. Particularly, a metal foil is preferable. Examples of the metal constituting the first current collector layer 11 include Cu, Ni, Cr, Au, Pt, Ag, Al, Fe, Ti, Zn, Co, and stainless steel. Particularly, Cu is preferable. The first current collector layer 11 may have, on its surface, any coat layer for adjusting resistance. The first current collector layer 11 may be composed of a plurality of layers. For example, the first current collector layer 11 can be formed by stacking a plurality of metal foils. The thickness of the first current collector layer 11 (the total thickness in the case of a plurality of layers; the same applies to other layers) is not particularly limited. For example, the thickness is preferably from 0.1 μm to 1 mm, more preferably from 1 μm to 100 μm. When the first active material layer 21 and the second active material layer 22 described later are negative electrode active material layers, the first current collector layer 11 functions as a negative electrode current collector layer. On the other hand, when the first active material layer 21 and the second active material layer 22 are positive electrode active material layers, the first current collector layer 11 functions as a positive electrode current collector layer.

1.2. First Active Material Layer and Second Active Material Layer In the all-solid-state battery 100, a first active material layer 21 is stacked on one surface of the first current collector layer 11, and the first current collector The second active material layer 22 is laminated on the other surface of the layer 11. The first active material layer 21 may be composed of a plurality of layers. For example, the first active material layer 21 may be formed by laminating an active material layer on the surface of one active material layer and forming a plurality of layers as a whole. The second active material layer 22 may also be composed of a plurality of layers. The first active material layer 21 and the second active material layer 22 are one of a negative electrode active material layer and a positive electrode active material layer. In particular, a negative electrode active material layer is preferable. The first active material layer 21 and the second active material layer 22 may be layers containing the same type of material or layers containing different materials. Preferably, it is a layer containing the same kind of material. Hereinafter, the negative electrode active material layer will be described.

The negative electrode active material layer is a layer containing at least an active material. The negative electrode active material layer can optionally contain a solid electrolyte, a binder, a conductive additive, and the like, in addition to the active material. A known active material may be used as the active material. Among the known active materials, two materials having different potentials (charge / discharge potentials) for inserting and extracting predetermined ions are selected, a material showing a noble potential is used as a positive electrode active material described later, and a material showing a noble potential is used. Each can be used as a negative electrode active material. For example, when forming a lithium ion battery, a silicon-based active material such as Si, a Si alloy or silicon oxide as a negative electrode active material; a carbon-based active material such as graphite or hard carbon; various oxide-based active materials such as lithium titanate; Substance: Metallic lithium, lithium alloy, or the like can be used. The solid electrolyte that can be included in the negative electrode active material layer is preferably an inorganic solid electrolyte. This is because the ionic conductivity is higher than that of the organic polymer electrolyte. Further, it is because it has excellent heat resistance as compared with the organic polymer electrolyte. Preferred inorganic solid electrolytes include, for example, oxide solids such as lithium lanthanum zirconate, LiPON, Li _{1 + X} Al _X Ge _2-X (PO ₄ ) ₃ , Li-SiO glass, and Li-Al-SO glass. Electrolyte; Li ₂ S—P ₂ S ₅ , Li ₂ S—SiS ₂ , LiI—Li ₂ S—SiS ₂ , LiI—Si ₂ S—P ₂ S ₅ , Li ₂ S—P ₂ S ₅ —LiI-LiBr _{, LiI-Li 2 S-P} 2 S 5, LiI-Li 2 S-P 2 O 5, LiI-Li 3 PO 4 -P 2 S 5, Li 2 S-P 2 S 5 -GeS sulfides such as ₂ A solid electrolyte can be exemplified. In particular, preferred sulfide solid _electrolyte, more preferably a sulfide solid electrolyte containing _{Li 2 S-P 2 S 5} , the sulfide solid electrolyte containing _{Li 2 S-P 2 S 5} -LiI-LiBr is more preferred. Examples of the binder that can be included in the negative electrode active material layer include butadiene rubber (BR), butylene rubber (IIR), acrylate butadiene rubber (ABR), and polyvinylidene fluoride (PVdF). Examples of the conductive auxiliary agent that can be included in the negative electrode active material layer include carbon materials such as acetylene black and Ketjen black, and metal materials such as nickel, aluminum, and stainless steel. The content of each component in the negative electrode active material layer may be the same as in the related art. The shape of the negative electrode active material layer may be the same as the conventional one. In particular, from the viewpoint that the all-solid-state battery 100 can be easily configured, a sheet-shaped negative electrode active material layer is preferable. In this case, the thickness of the negative electrode active material is preferably, for example, 0.1 μm or more and 1 mm or less, and more preferably 1 μm or more and 150 μm or less. However, it is preferable to determine the size (area and thickness) of the negative electrode active material layer so that the capacity of the negative electrode is larger than the capacity of the positive electrode.

1.3. First solid electrolyte layer and second solid electrolyte layer In the all-solid-state battery 100, a first solid electrolyte layer 31 is laminated on one surface of the first active material layer 21; A second solid electrolyte layer 32 is laminated on the other surface of the current collector layer 22. The first solid electrolyte layer 31 may be composed of a plurality of layers. For example, the first solid electrolyte 31 may be configured as a whole of a plurality of layers by further laminating a solid electrolyte layer on the surface of one solid electrolyte layer. The second solid electrolyte layer 32 may also be composed of a plurality of layers. The first solid electrolyte layer 31 and the second solid electrolyte layer 32 may be layers containing the same type of material or layers containing different materials. Preferably, it is a layer containing the same kind of material.

The solid electrolyte layer is a layer containing at least an electrolyte. The solid electrolyte layer may optionally contain a binder in addition to the solid electrolyte. As the solid electrolyte, the above-mentioned inorganic solid electrolyte is preferable, and a sulfide solid electrolyte is more preferable. In this case, the sulfide solid electrolyte contained in the solid electrolyte layer is preferably a sulfide solid electrolyte containing Li ₂ S—P ₂ S _5, and a sulfide solid electrolyte containing Li ₂ S—P ₂ S ₅ —LiI—LiBr. Is more preferred. As the binder, the same binder as described above can be appropriately selected and used. The content of each component in the solid electrolyte layer may be the same as in the related art. The shape of the solid electrolyte layer may be the same as the conventional one. In particular, a sheet-like solid electrolyte layer is preferable from the viewpoint that the all-solid-state battery 100 can be easily configured. In this case, the thickness of the solid electrolyte layer is preferably, for example, 0.1 μm or more and 1 mm or less, and more preferably 1 μm or more and 100 μm or less.

1.4. Third Active Material Layer and Fourth Active Material Layer In the all-solid-state battery 100, a third active material layer 23 is laminated on one surface of the first solid electrolyte layer 31, and a second solid electrolyte layer is formed. On the other surface of the layer 32, a fourth active material layer 24 is laminated. The third active material layer 23 may be composed of a plurality of layers. For example, a third active material layer 23 can be formed as a plurality of layers by further stacking an active material layer on the surface of one active material layer. The fourth active material layer 24 may also be composed of a plurality of layers. When the above-mentioned first active material layer 21 and second active material layer 22 are negative electrode active material layers, third active material layer 23 and fourth active material layer 24 are positive electrode active material layers. On the other hand, when the first active material layer 21 and the second active material layer 22 are positive electrode active material layers, the third active material layer 23 and the fourth active material layer 24 are negative electrode active material layers. In particular, the third active material layer 23 and the fourth active material layer 24 are preferably positive electrode active material layers. The third active material layer 23 and the fourth active material layer 24 may be layers containing the same type of material or layers containing different materials. Preferably, it is a layer containing the same kind of material. Hereinafter, the positive electrode active material layer will be described.

The positive electrode active material layer is a layer containing at least an active material. The positive electrode active material layer can optionally contain a solid electrolyte, a binder, a conductive additive, and the like, in addition to the active material. A known active material may be used as the active material. Among known active materials, two materials having different potentials (charge / discharge potentials) for inserting and extracting predetermined ions are selected, a material showing a noble potential is used as a positive electrode active material, and a material showing a low potential is used as the above-described material. Each can be used as a negative electrode active material. For example, when configuring a lithium ion battery, various types of positive electrode active materials such as lithium cobalt oxide, lithium nickel oxide, LiNi _1/3 Co _1/3 Mn _1/3 O ₂ , lithium manganate, and spinel lithium compounds are used. A lithium-containing composite oxide can be used. The surface of the positive electrode active material may be covered with an oxide layer such as a lithium niobate layer, a lithium titanate layer, and a lithium phosphate layer. As the solid electrolyte that can be included in the positive electrode active material layer, the above-described inorganic solid electrolyte is preferable. In particular, preferred sulfide solid _electrolyte, more preferably a sulfide solid electrolyte containing _{Li 2 S-P 2 S 5} , the sulfide solid electrolyte containing _{Li 2 S-P 2 S 5} -LiI-LiBr is more preferred. Examples of the binder that can be included in the positive electrode active material layer include butadiene rubber (BR), butylene rubber (IIR), acrylate butadiene rubber (ABR), and polyvinylidene fluoride (PVdF). Examples of the conductive additive that can be included in the positive electrode active material layer include carbon materials such as acetylene black and Ketjen black, and metal materials such as nickel, aluminum, and stainless steel. The content of each component in the positive electrode active material layer may be the same as in the related art. The shape of the positive electrode active material layer may be the same as the conventional one. In particular, a sheet-like positive electrode active material layer is preferable from the viewpoint that the all-solid-state battery 100 can be easily configured. In this case, the thickness of the positive electrode active material layer is preferably, for example, 0.1 μm or more and 1 mm or less, and more preferably 1 μm or more and 150 μm or less.

1.5. Second Current Collector Layer and Third Current Collector Layer In the all-solid-state battery 100, the second current collector layer 12 is laminated on one surface of the third active material layer 23, On the other surface of the active material layer 24, a third current collector layer 13 is laminated. The second current collector layer 12 may be composed of a plurality of layers. For example, the second current collector layer 12 may be formed by stacking a plurality of metal foils. The third current collector layer 13 may also be composed of a plurality of layers. The second current collector layer 12 and the third current collector layer 13 may be layers containing the same type of material or layers containing different materials. Preferably, it is a layer containing the same kind of material. Further, the first current collector layer 11 and the second current collector layer 12 may be layers containing the same type of material or layers containing different materials. Preferably, it is a layer containing a different material. Further, the first current collector layer 11 and the third current collector layer 13 may be layers containing the same type of material or layers containing different materials. Preferably, it is a layer containing a different material.

  The second current collector layer 12 and the third current collector layer 13 may be made of a metal foil, a metal mesh, or the like. Particularly, a metal foil is preferable. Examples of the metal constituting the second current collector layer 12 and the third current collector layer 13 include Cu, Ni, Cr, Au, Pt, Ag, Al, Fe, Ti, Zn, Co, and stainless steel. No. Particularly, Al is preferable. The second current collector layer 12 and the third current collector layer 13 may have some coat layer on the surface thereof for adjusting the resistance. The thickness of each of the second current collector layer 12 and the third current collector layer 13 is not particularly limited. For example, the thickness is preferably from 0.1 μm to 1 mm, more preferably from 1 μm to 100 μm. When the first active material layer 21 and the second active material layer 22 are negative electrode active material layers, the second current collector layer 12 and the third current collector layer 13 serve as positive electrode current collector layers. Function. On the other hand, when the first active material layer 21 and the second active material layer 22 are positive electrode active material layers, the second current collector layer 12 and the third current collector layer 13 serve as negative electrode current collector layers. Function.

1.6. Extension In the all-solid-state battery 100, at least the first current collector layer 11 extends outside the third active material layer 23 and the fourth active material layer 24 to form the extension 40. ing. In other words, the area of the first current collector layer 11 is larger than the area of each of the third active material layer 23 and the fourth active material layer 24 in the stacking direction of each layer. It is sufficient that the extension section 40 includes at least the first current collector layer 11. Preferably, at least the first current collector layer 11, the first active material layer 21, and the second active material layer 22 extend outside the third active material layer 23 and the fourth active material layer 24. The extension portion 40 is formed. More preferably, as shown in FIG. 2, the first current collector layer 11, the first active material layer 21, the second active material layer 22, the first solid electrolyte layer 31, and the second solid electrolyte layer 32 extends outside the third active material layer 23 and the fourth active material layer 24 to form an extension 40. The extension lengths of the first current collector layer 11, the first active material layer 21, the second active material layer 22, the first solid electrolyte layer 31, and the second solid electrolyte layer 32 are the same. It may be different. Preferably, as shown in FIG. 2, each extension length is substantially the same. In the all-solid-state battery 100 of the present disclosure, the problem of short-circuiting or sliding down is solved by covering the extension portion 40 with the insulating resin layer 50.

1.7. Insulating Resin Layer In the all-solid-state battery 100, an insulating resin layer 50 is provided on one surface, side surfaces, and the other surface of the extension portion 40. As shown in FIG. 2, the insulating resin layer 50 may have a substantially C-shaped cross section. The insulating resin layer 50 may be a layer made of an insulating resin. In particular, it is preferably made of an ultraviolet curing resin. The type of the ultraviolet curing resin is not particularly limited, and any general ultraviolet curing resin can be adopted. For example, an ultraviolet curable resin of a cationic polymerization type or a radical polymerization type may be used. The insulating resin layer 50 may include a filler from the viewpoint of improving the reliability of the thickness. The type of the filler is not particularly limited, and particles made of various materials can be used.

  In the all-solid-state battery 100, the first current collector layer 11, the first active material layer 21, the second active material layer 22, the first solid electrolyte layer 31, and the second solid electrolyte layer 32 are The third active material layer 23 and the fourth active material layer 24 extend outside to form the extended portion 40, and the insulating resin layer 50 is provided on one surface of the first solid electrolyte layer 31. It is preferable to be provided continuously over the side surface of the extension portion 40 and the other surface of the second solid electrolyte layer 42. Thereby, the contact between the first current collector layer 11 and the first active material layer 21 and the second current collector layer 12 can be more reliably prevented, and the first current collector layer 11 Further, contact between the second active material layer 22 and the third current collector layer 13 can be more reliably prevented. That is, a short circuit between the positive electrode and the negative electrode can be further suppressed.

  The thickness of the insulating resin layer 50 is not particularly limited. The thickness of the insulating resin layer 50 may be appropriately determined in consideration of the balance between the volume energy density of the battery and the insulating function. For example, the thickness of the insulating resin layer 50 on one surface of the extension portion 40 (the thickness along the stacking direction of the layers 11, 21,...) Is made smaller than the thickness of the third active material layer 23 described above. It is preferable that the thickness of the insulating resin layer 50 (the thickness along the stacking direction of the layers 11, 21,...) On the other surface of the extension portion 40 be larger than the thickness of the fourth active material layer 24 described above. It is preferable to make it thin. 3, one surface 50a of the insulating resin layer 50 exists on the other side with respect to the one surface 23a of the third active material layer 23, as indicated by a dashed line in FIG. It is preferable that the other surface 50b be present on one side with respect to the other surface 24a of the fourth active material layer 24. The thickness of the insulating resin layer 50 on the side surface of the extension portion 40 (the thickness along the extension direction of the extension portion 40) may be increased. Note that the insulating resin layer 50 may be in contact with the side surface of the third active material layer 23 or the side surface of the fourth active material layer 24, or may be in contact with the side surface of the third active material layer 23 or the fourth active material layer 24. A gap may exist between the material layer 24 and the side surface. Further, the insulating resin layer 50 may reach one surface of the third active material layer 23 or the other surface of the fourth active material layer 24.

  As illustrated in FIG. 2, in the all-solid-state battery 100 of the present disclosure, one side (one side with respect to the other surface of the second current collector layer 12) from the side surface of the end of the second current collector layer 12. ) And the other side from the side surface of the end portion of the third current collector layer 13 (the other side with respect to one surface of the third current collector layer 13) does not need to be covered with the insulating resin layer 50. . That is, as shown in FIG. 2, the insulating resin layer 50 only needs to be present between the second current collector layer 12 and the third current collector layer 13. As described above, in the all-solid-state battery 100, if only the extending portion 40 is covered with the insulating resin layer 50, a sufficient effect is exhibited, and even if the entire end of the battery is not covered with the insulating resin, the effect at the battery end is obtained. Short circuits and slipping can be suppressed.

1.8. Other Configurations In the all-solid-state battery, a current collecting tab connected to the current collector layer may be provided, and the current collecting tab may protrude from a side surface. Specifically, as shown in FIGS. 1 and 2, the all-solid-state battery 100 includes a first current collector tab 11 a connected to the first current collector layer 11, and a second current collector layer 12. A second current collecting tab 12a to be connected and a third current collecting tab 13a to be connected to the third current collector layer 13 may be provided. Each of the current collecting tabs 11a to 13a is provided on a side surface of the battery. May protrude from. The current collector tab and the current collector layer may be made of the same material or may be made of different materials. The projecting length of the current collecting tab is not particularly limited.

  The all solid state battery 100 may be housed in a battery case such as a laminate pack. .. May be combined to form a single stacked battery. For example, after stacking a plurality of all-solid-state batteries 100 and electrically connecting the positive electrodes and the negative electrodes of each of the all-solid-state batteries 100, 100,. It may be housed in a battery case.

1.9. Effect As shown in FIG. 4A, in the related art (Patent Document 1 and the like), the active material layer and the like are exposed at the end of the battery, and the current collector layer or the current collecting tab and the active material layer and the like. Contact with the battery may cause a short circuit at the end of the battery or slipping of the material. On the other hand, as shown in FIG. 4B, according to the technology of the present disclosure, by providing an insulating resin layer in the extension portion, contact between the current collector layer or the current collection tab and the active material layer or the like is prevented. As a result, it is possible to suppress a short circuit or material slippage at the end of the battery.

2. Resin coating device 2.1. Resin coating device 200
5 and 6 schematically show the configuration of the resin coating device 200. As shown in FIGS. 5 and 6, the resin coating device 200 includes a pair of transfer rings 110, 110 arranged such that transfer surfaces 110 a, 110 a face each other with a gap 110 b therebetween; There are provided resin supply sources 120 and 120 for supplying ultraviolet curing resin 121 to the transfer surfaces 110a and 110a of 110, and at least one ultraviolet source 130 for supplying ultraviolet light to at least the gap 110b. In the resin coating device 200, the transfer ring 110, the resin supply source 120, and the ultraviolet light source 130 are configured as follows, for example, so that the end of the transfer target X (for example, the above-described all-solid-state battery 100. The insulating resin layer can be easily and appropriately provided over the one side surface, the side surface, and the other side surface of the extension portion 40). That is, as shown in FIGS. 5 and 6, the resin coating device 200 is configured such that, for example, the end of the transfer target X is disposed in the gap 110 b. The UV curable resin 121 supplied to the transfer surfaces 110a, 110a of the 110 is transferred from the transfer surfaces 110a, 110a to the one side surface, the side surface, and the other surface of the end of the transferred object X with the rotation of the transfer rings 110, 110. Are transferred at the same time, and the transferred ultraviolet curing resin 121 is cured by the ultraviolet light from the ultraviolet light source 130, and is applied to one surface, side surface, and the other surface of the end of the object X to be transferred. The configuration is such that the insulating resin layer is provided continuously over the entire surface.

2.1.1. Transfer Ring The resin coating device 200 includes a pair of transfer rings 110, 110 arranged such that the transfer surfaces 110a, 110a face each other with a gap 110b therebetween. The transfer ring 110 has a ring-shaped transfer surface 110a. The size of the transfer ring 110 is not particularly limited. From the viewpoint that the insulating resin layer can be more easily formed on the extending portion 40 of the above-described all-solid-state battery 100, for example, the diameter of the transfer ring 110 is preferably 50 mm or more and 200 mm or less, and the transfer surface 110a (The thickness of the ring in the horizontal direction of FIG. 5) is preferably 3 mm or more and 20 mm or less. The material of the transfer ring 110 may be any material capable of appropriately transferring the ultraviolet curing resin 121 to the transfer target X, and may be made of ceramic, metal, resin, or the like. From the viewpoint of facilitating the ultraviolet rays from the ultraviolet ray source 130 to reach the gap 110b, the transfer ring 110 is preferably made of a material having ultraviolet transmittance. Examples of the material having ultraviolet transparency include transparent ceramics such as quartz, acrylic resins, and resins such as PTFE. Further, from the viewpoint of improving the releasability of the ultraviolet curable resin 121, the transfer surface 110a is preferably made of polytetrafluoroethylene or silicon. That is, the transfer ring 110 is preferably surface-treated with PTFE or silicon.

  In the resin coating device 200, a pair of transfer rings 110, 110 are arranged such that the transfer surfaces 110a, 110a face each other with a gap 110b therebetween. The size of the gap 110b is not particularly limited. From the viewpoint that the insulating resin layer can be more easily formed on the extending portion 40 of the all-solid-state battery 100, the gap 110b is preferably 100 μm or more and 1 mm or less.

  The resin coating device 200 preferably includes a separation mechanism for increasing or decreasing the gap 110b. The separating mechanism may automatically increase or decrease the gap 110b, or may increase or decrease the gap 110b manually. For example, when the pair of transfer rings 110, 110 are arranged vertically, an elevator for raising and lowering at least one position of the pair of transfer rings 110, 110 can be adopted as the separating mechanism. When the transfer of the resin to the end of the transferred object X is started, the gap 110b is increased by the separating mechanism, so that the end of the transferred object X is prevented from being broken or damaged. The part can be smoothly arranged in the gap 110b.

  In the resin coating device 200, at least one of the pair of transfer rings 110 may be provided with a notch. As described above, when the transfer ring 110 having the notch is used, when the transfer ring 110 is rotated and the notch reaches the gap 110b, the gap 110b increases. That is, by arranging the end of the transfer target X in the gap 110b at the timing when the notch reaches the gap 110b, the end of the transfer target X is suppressed while the end of the transfer target X is prevented from being broken or damaged. The part can be smoothly arranged in the gap 110b.

  As shown in FIGS. 5 and 6, the transfer ring 110 is rotatable in a predetermined direction about the center of the ring as a rotation axis. As shown in FIGS. 5 and 6, the pair of transfer rings 110, 110 are controlled such that their rotation directions are opposite to each other. In addition, the pair of transfer rings 110, 110 are controlled so that their rotational speeds are substantially the same. Thereby, the ultraviolet curable resin 121 can be simultaneously transferred over the one side surface, the side surface, and the other side surface of the end portion of the transfer object X. The power source for rotating the transfer ring 110 is not particularly limited. For example, as shown in FIG. 5, the transfer ring 110 can be rotated at a predetermined speed in a predetermined direction by a motor 140 and a control device (not shown).

2.1.2. Resin Supply Source The resin coating device 200 includes resin supply sources 120, 120 that supply the ultraviolet curing resin 121 to the transfer surfaces 110a, 110a of the respective transfer rings 110, 110. The resin supply source 120 is a device that supplies the ultraviolet curing resin 121 to the transfer surface 110a. The resin supply source 120 may be any as long as it can supply a fixed amount of the ultraviolet curable resin to the transfer surface 110a. Such devices include, for example, dispensers. When a dispenser is used, the method is not particularly limited. Any method such as a syringe method, a volume calculation method, a tubing method, and a non-contact method may be employed. Further, the ultraviolet curable resin 121 may be continuously supplied to the transfer surface 110a via an extrusion nozzle or the like, or may be intermittently supplied in a droplet form via a spray nozzle or the like. The amount (flow rate or flow rate) of the UV curable resin 121 supplied from the resin supply source 120 to the transfer surface 110a is not particularly limited, and depends on the form of the insulating resin layer to be formed at the end of the transfer object. May be adjusted appropriately.

  The type of the ultraviolet curable resin 121 is not particularly limited, and any general ultraviolet curable resin can be adopted. For example, an ultraviolet curable resin of a cationic polymerization type or a radical polymerization type may be used. In addition, the ultraviolet curable resin 121 may include a filler from the viewpoint of preventing film breakage during transfer and improving the reliability of the thickness. The type of the filler is not particularly limited, and particles made of various materials can be used. In addition, although the curing reaction is inhibited by oxygen in some ultraviolet curable resins, since the oxygen is almost blocked in the gap 110b of the resin coating device 200, the curing reaction is inhibited by oxygen as the ultraviolet curable resin 121. Even if such a material is used, the ultraviolet curable resin 121 can be appropriately cured in the gap 110b by the ultraviolet light from the ultraviolet light source 130. In this regard, in the resin coating apparatus 200, when the resin 121 is transferred or cured, the atmosphere around the transfer ring 110 or the like does not need to be an inert atmosphere such as a nitrogen atmosphere, but an oxygen-containing atmosphere such as an air atmosphere. It is also possible. Further, as described later, it is also possible to preliminarily cure only a part of the ultraviolet curable resin 121 by effectively using the inhibition of the curing reaction by oxygen.

  The resin supply source 120 may be arranged so as to appropriately supply the ultraviolet curing resin 121 to the transfer surface 110a. For example, as shown in FIG. 6, a resin supply source 120 can be arranged upstream of the transfer ring 110 in the transport direction of the transfer target X. Alternatively, when the pre-curing of the ultraviolet curable resin 121 is desired to proceed, the resin supply source 120 can be disposed downstream of the transfer ring 110 in the transport direction of the transfer target X.

  In the resin coating device 200, the number of the resin supply sources 120 is not particularly limited. As shown in FIG. 6, one or more resin supply sources 120 may be arranged for one transfer ring 110.

2.1.3. Ultraviolet Source The resin coating device 200 includes at least one ultraviolet source 130 that supplies ultraviolet light to at least the gap 110b. The type of the ultraviolet light source 130 is not particularly limited, and any ultraviolet light source that emits ultraviolet light or ultraviolet light that can cure the ultraviolet curable resin 121, such as an ultraviolet lamp or an ultraviolet light emitting diode, can be used. From the viewpoint of easily controlling the irradiation direction of ultraviolet rays, an ultraviolet light emitting diode is particularly preferable.

  The position of the ultraviolet light source 130 in the resin coating device 200 is not particularly limited. For example, as shown in FIG. 5, the ultraviolet light source 130 can be arranged near the gap 110b. Ultraviolet rays from the ultraviolet ray source 130 may reach the gap 110b after passing through some member. For example, when the transfer ring 110 has ultraviolet transmittance, as shown in FIG. 7, the resin coating device 200 causes the ultraviolet light emitted from the ultraviolet light source 130 to pass through the transfer ring 110 and reach the gap 110b. It may be configured. By irradiating the ultraviolet ray through the transfer ring 110, the ultraviolet curable resin 121 can be more efficiently cured in the gap 110b. Alternatively, the ultraviolet light from the ultraviolet light source 130 may reach the gap 110b after being reflected by the reflecting mirror as described later.

  In the resin coating device 200, the number of the ultraviolet light sources 130 in the resin coating device 200 is not limited to one, and a plurality of ultraviolet light sources 130 may be provided. When the resin coating device 200 includes a plurality of ultraviolet light sources 130, 130,..., At least a part of the plurality of ultraviolet light sources 130, 130,. There may be an ultraviolet light source 130 that supplies ultraviolet light to a portion of the transfer surface 110a other than the gap 110b. For example, when the resin coating device 200 includes a plurality of ultraviolet light sources 130, as shown in FIG. 8, ultraviolet light emitted from a part of the ultraviolet light sources 130 (130a) passes through the transfer ring 110 and out of the transfer surface 110a. The ultraviolet curable resin 121 supplied from the resin supply source 120 to the transfer surface 110a is configured to reach a portion other than the gap 110b, and the ultraviolet curable resin 121 is supplied to the gap 110b by ultraviolet rays from some of the ultraviolet sources 130 (130a). It may be configured to be preliminarily cured on the transfer surface 110a before reaching. In this case, the wavelength of ultraviolet light emitted from some ultraviolet light sources 130 (130a) may be different from the wavelength of ultraviolet light emitted from other ultraviolet light sources 130 (130b). In this case, the ultraviolet curable resin 121 may be a material that is cured by irradiating at least two wavelengths or more of ultraviolet light, for example, the ultraviolet curable resin 121 contains at least two or more types of polymerization initiators. It may be. In such a case, the ultraviolet curing resin 121 is preliminarily cured on the transfer surface 110a before reaching the gap 110b by ultraviolet rays (for example, ultraviolet rays having a large wavelength) emitted from some of the ultraviolet sources 130 (130a). Then, it becomes easy to completely cure the ultraviolet curing resin 121 in the gap 110b by ultraviolet rays (for example, ultraviolet rays having a small wavelength) emitted from the other ultraviolet sources 130 (130b). A plurality of ultraviolet sources 130 may be provided concentrically with the transfer ring 110 (see, for example, FIG. 11B). When a reflecting mirror described later is provided, a plurality of ultraviolet light sources 130 may be positioned according to the shape of the reflecting mirror. As described above, by preliminarily curing the ultraviolet curable resin 121 on the transfer surface 110a before reaching the gap 110b, an improvement in the curing speed of the ultraviolet curable resin 121 in the gap 110b can be expected. Improve the nature. The degree of preliminary curing of the ultraviolet curable resin 121 is not particularly limited as long as the transferability and the adhesiveness to the transfer target X are ensured. When a curing reaction is inhibited by oxygen as the UV-curable resin 121, the UV-curable resin 121 supplied to the transfer surface 110a is exposed to the air during the preliminary curing as shown in FIG. On the surface (the surface that is in contact with or adhered to the end surface of the transfer object X), the curing reaction does not proceed due to inhibition by oxygen, while the surface that is not exposed to the atmosphere (the surface that contacts the transfer surface 110a, the transfer surface 110a). At the interface), the curing reaction proceeds. That is, even when the ultraviolet curing resin 121 is pre-cured, high transferability and adhesiveness to the end of the transfer target X can be ensured.

2.1.4. Other Members The resin coating device 200 may include the pair of transfer rings 110, 110, at least one resin supply source 120, and at least one ultraviolet light source 130 as described above. The other members are optional.

  For example, as shown in FIG. 6, the resin coating device 200 includes a scraper 150 for removing the resin remaining on the transfer surface 110a on the downstream side of the transfer ring 110 in the transport direction of the transfer target X. May be. As shown in FIG. 6, the resin coating device 200 may include a roller 160 on the downstream side of the transfer ring 110 to assist in the separation of the object X from the transfer surface 110a.

2.2. Resin coating device 300
FIG. 10 schematically shows a configuration of a resin coating device 300 which is an application of the resin coating device 200. 10, the same components as those of the resin coating device 200 are denoted by the same reference numerals. As shown in FIG. 10, in the resin coating device 300, the transfer ring 110 has ultraviolet transmittance, and includes a reflecting mirror 210 that reflects ultraviolet light from the ultraviolet light source 130 inside the transfer surface 110 a. The ultraviolet light emitted from the ultraviolet light source 130 is configured to be reflected by the reflecting mirror 210, pass through the transfer ring 110, and reach the gap 110b. As described above, by controlling the traveling direction of the ultraviolet light by using the reflecting mirror 210, the degree of freedom of installation of the ultraviolet light source 130 is increased, and the size of the apparatus can be reduced.

  The reflecting mirror 210 may be formed separately from the transfer ring 110, or may be fixed to the transfer ring 110. In consideration of handling and easiness of arrangement, it is preferable that the reflecting mirror 210 is fixed to the transfer ring 110. The shape of the reflecting mirror 210 is not particularly limited, but is preferably provided continuously and concentrically with the transfer ring 110 inside the transfer surface 110a as shown in FIG. Thereby, as shown in FIG. 11B, a plurality of ultraviolet sources 130 can be arranged on the circumference along the shape of the reflecting mirror 210, and the above-mentioned preliminary curing of the ultraviolet curing resin 121 becomes easy.

  The angle of reflection of the ultraviolet light by the reflecting mirror 210 is not particularly limited, and may be appropriately determined in consideration of the direction of emission of the ultraviolet light from the ultraviolet light source 130 and the position of the gap 110b. In particular, as shown in FIG. 10, it is preferable that the ultraviolet ray from the ultraviolet ray source 130 is reflected by the reflecting mirror 210 at a substantially right angle. Thus, as shown in FIG. 11B, it becomes easier to arrange a plurality of ultraviolet light sources 130 on the circumference along the shape of the reflecting mirror 210.

2.3. Resin coating device 400
FIG. 12 schematically shows a configuration of a resin coating device 400 which is an application of the resin coating device 200. 12, the same components as those of the resin coating device 200 are denoted by the same reference numerals. As shown in FIG. 12, in the resin coating apparatus 400, the transfer ring 110 has a transport belt 111 on the surface, and the surface of the transport belt 111 is the transfer surface 110a. In this case, as shown in FIG. 12, a plurality of transfer rings 110, 110 are provided in the transfer direction of the transfer target X, and the plurality of transfer rings 110, 110 provided in the transfer direction are connected via a transfer belt 111. It is preferred that Since the transfer ring 110 includes the transport belt 111 on the front surface, the transfer target X can be transported more smoothly. Here, in the resin coating device 400, the surface of the transfer belt 111 serving as the transfer surface 110 a is made of a material that is more excellent in releasability from the ultraviolet curable resin than the surface of the end of the transfer target X. There is one feature. Examples of such a material having excellent releasability include a fluorine resin. Specific examples of the fluorine resin include polytetrafluoroethylene. The transport belt 111 only needs to have at least the surface made of a material having excellent releasability. For example, a form in which the entire belt is made of the material, a form in which the material is coated on the surface of the belt, and the like are employed. Is done. This makes it easier for the cured ultraviolet curable resin 121 to be peeled off from the transfer surface 110a, so that the transferred object X can be transported more smoothly, and the reliability of the resin coating on the end portion of the transferred object X is further improved. .

  As shown in FIG. 12, when a plurality of transfer rings 110 provided in the transport direction are connected to each other via a transport belt 111, the length of the transport belt 111 (the distance between the transfer rings 110 and 110 in the transport direction) and The transport speed may be appropriately adjusted according to the curing time of the ultraviolet curable resin 121 and the like. As shown in FIG. 12, an ultraviolet light source 130 (130c) may be provided between the plurality of transfer rings 110 provided in the transport direction. In this case, the irradiation range of the ultraviolet light from the ultraviolet light source 130 (130c) can be appropriately determined according to the length, the conveyance speed, the curing time of the ultraviolet curable resin 121, and the like of the conveyance belt 111. When connecting the plurality of transfer rings 110 provided in the transport direction via the transport belt 111, an ultraviolet light source 130 (130c) is provided between the plurality of transfer rings 110 provided in the transport direction. Thus, the ultraviolet curable resin 121 can be more reliably cured.

2.4. Effects As described above, according to the resin coating devices 200, 300, 400, etc., the ultraviolet curable resin is simultaneously applied to one side, the side, and the other side of the end of the object X using the pair of transfer rings 110, 110. Can be transcribed. Accordingly, it is possible to perform thin transfer while crushing the ultraviolet curable resin 121 at the end of the transferred object X while correcting warpage and undulation of the transferred object X without damaging the transferred object X. Further, the insulating resin layer can be provided in an accurate position at an accurate position at an end of the transfer object while avoiding damage due to contact between the nozzle and the transfer object X.

3. Resin coating system The technology of the present disclosure also has aspects as a resin coating system. That is, as shown in FIGS. 5 to 10, the resin coating system of the present disclosure includes a pair of transfer rings 110, 110 arranged such that the transfer surfaces 110 a, 110 a face each other with the gap 110 b interposed therebetween. A resin supply source 120 for supplying an ultraviolet curing resin 121 to the transfer surfaces 110a, 110a of the transfer rings 110, 110, at least one ultraviolet source 130 for supplying ultraviolet light to at least the gap 110b, and an ultraviolet curing A transfer target X on which the resin 121 is transferred to form an insulating resin layer. In the resin coating system, the end of the transferred object X is disposed in the gap 110b, and the ultraviolet curable resin supplied from the resin supply source 120 to the transfer surfaces 110a, 110a of the transfer rings 110, 110 The ultraviolet rays 121 are simultaneously transferred from the transfer surfaces 110a, 110a to the one side surface, the side surface, and the other side surface of the end of the transfer target X with the rotation of the transfer rings 110, 110, and the transferred ultraviolet light The cured resin 121 is cured by the ultraviolet rays from the ultraviolet light source 130, whereby an insulating resin layer is continuously provided on one side surface, the side surface, and the other side surface of the end of the object X to be transferred. In the resin coating system of the present disclosure, the possible forms of the transfer ring 110, the resin supply source 120, and the ultraviolet light source 130 are similar to those of the above-described resin coating devices 200 and 300, and thus detailed description is omitted here. In the resin coating system of the present disclosure, a form that the transfer target X can take is, for example, the all-solid-state battery 100 as described above. That is, according to the resin application system of the present disclosure, when manufacturing the all-solid-state battery 100, the insulating resin layer 50 can be continuously provided over the one side surface, the side surface, and the other side surface of the extension portion 40. .

4. Method for Manufacturing All-Solid-State Battery The technology of the present disclosure also has an aspect as a method for manufacturing the all-solid-state battery 100. As shown in FIG. 11, in the method for manufacturing the all-solid-state battery 100 of the present disclosure, a first active material layer 21 is stacked on one surface of the first current collector layer 11, and the first current A second active material layer 22 is laminated on the other surface of the body layer 11, a first solid electrolyte layer 31 is laminated on one surface of the first active material layer 21, and the second active material layer is laminated. The second solid electrolyte layer 32 is laminated on the other surface of the second solid electrolyte layer 22, the third active material layer 23 is laminated on one surface of the first solid electrolyte layer 31, and the second solid electrolyte layer 32 is A fourth active material layer 24 is stacked on the other surface (FIG. 11A). Here, the first active material layer 21 and the second active material layer 22 are any one of a negative electrode active material layer and a positive electrode active material layer, and the first active material layer 21 and the second When the second active material layer 22 is a negative electrode active material layer, the third active material layer 23 and the fourth active material layer 24 are positive electrode active material layers, and the first active material layer 21 and the When the second active material layer 22 is a positive electrode active material layer, the third active material layer 23 and the fourth active material layer 24 are negative electrode active material layers, and at least the first active material layer 21 and the The second active material layer 22 is extended outside the third active material layer 23 and the fourth active material layer 24 to form an extended portion 40 (FIG. 11A). In this way, after forming the extending portion 40, the ultraviolet curable resin 121 is transferred to one surface of the extending portion 40, the side surface of the extending portion 40, and the other surface of the extending portion 40. (FIG. 11B), and the ultraviolet curable resin 121 transferred to the extending portion 40 is irradiated with ultraviolet rays to cure the ultraviolet curable resin 121 to form the insulating resin layer 50 (FIG. 11B). (C)). In this way, after providing the insulating resin layer 50 on the extension portion 40, the second current collector layer 12 is laminated on one surface of the third active material layer 23, The third current collector layer 13 is stacked on the other surface of the active material layer 24 (FIG. 11D).

4.1. Production of Transferred Object (Laminated Body 60) In the production method of the present disclosure, as shown in FIG. 11A, the layers 11, 21, 24, 31, and 32 are laminated to form the third active material layer. 23, a first solid electrolyte layer 31, a first active material layer 21, a first current collector layer 11, a second active material layer 22, a second solid electrolyte layer 32, and a fourth active material layer 24 Are obtained in this order, and the laminated body 60 having the above-described extending portion 40 is obtained. Here, the stacking order of the layers 11, 21 to 24, 31, and 32 is not particularly limited. When the current collecting tab 11a is provided on the first current collector layer 11, it is preferable to connect the current collecting tab 11a to the first current collecting layer 11 before transferring the ultraviolet curable resin. A part of the first current collector layer 11 may be protruded by cutting a part of the metal foil or the like, and this may be used as the current collection tab 11a.

4.2. Transferring Ultraviolet Curable Resin to End of Transferred Object (Extended Part 40) In the manufacturing method of the present disclosure, after obtaining the laminate 60, as shown in FIG. The ultraviolet curable resin 121 is continuously provided by transfer over the side surface, the side surface of the extension portion 40, and the other surface of the extension portion 40. For example, as in the resin coating devices 200 and 300 described above, the ultraviolet curable resin 121 is simultaneously transferred from both surfaces of one side and the other side of the extension portion 40 using a pair of transfer rings 110 and 110.

4.3. In the manufacturing method of the present disclosure, after the ultraviolet curable resin is transferred to the extending portion 40, as shown in FIG. 11C, ultraviolet light is applied to the ultraviolet curable resin transferred to the extending portion 40. Irradiation is performed to cure the ultraviolet curable resin to form the insulating resin layer 50. For example, as in the resin coating devices 200 and 300 described above, the ultraviolet curing resin 121 is cured by ultraviolet rays from the ultraviolet source 130 in the gap 110b between the pair of transfer rings 110 and 110.

4.4. In the manufacturing method according to the present disclosure, after the insulating resin layer 50 is provided on the extension portion 40, the second current collector layer and the third current collector layer are stacked as shown in FIG. By stacking the second current collector layer 12 on one surface of the third active material layer 23 and stacking the third current collector layer 13 on the other surface of the fourth active material layer 24, A solid battery 100 can be obtained. The obtained all-solid-state battery 100 may be appropriately housed in a battery case.

4.5. Effects As described above, according to the method for manufacturing the all-solid-state battery 100 of the present disclosure, the ultraviolet-curing resin 121 is transferred to the one surface, the side surface, and the other surface of the extending portion 40 of the all-solid battery 100, The insulating resin layer 50 can be provided in an accurate position at an accurate position of the extension portion 40 while avoiding damage to the extension portion 40. In addition, by providing the second current collector layer 12 and the third current collector layer 13 after providing the insulating resin layer 50 on the extension portion 40, short-circuit and sliding down at the battery end can be suppressed ( (See FIG. 4).

  The all-solid-state battery of the present disclosure can be widely and suitably used from a small power supply for a portable device to a large power supply for a vehicle.

11 first current collector layer 11a first current collector tab 12 second current collector layer 12a second current collector tab 13 third current collector layer 13a third current collector tab 21 first active Material layer 22 Second active material layer 23 Third active material layer 24 Fourth active material layer 31 First solid electrolyte layer 32 Second solid electrolyte layer 40 Extension 50 Insulating resin layer 100 All solid state battery 110 Transfer ring 110a Transfer surface 110b Gap 111 Conveyor belt 120 Resin supply source 130 Ultraviolet light source 200 Resin coating device 210 Reflecting mirror 300 Resin coating device 400 Resin coating device

Claims (20)

A first current collector layer;
A first active material layer laminated on one surface of the first current collector layer;
A second active material layer laminated on the other surface of the first current collector layer;
A first solid electrolyte layer laminated on one surface of the first active material layer;
A second solid electrolyte layer laminated on the other surface of the second active material layer;
A third active material layer laminated on one surface of the first solid electrolyte layer,
A fourth active material layer laminated on the other surface of the second solid electrolyte layer,
A second current collector layer laminated on one surface of the third active material layer;
A third current collector layer laminated on the other surface of the fourth active material layer;
With
The first active material layer and the second active material layer are any one of a negative electrode active material layer and a positive electrode active material layer, and the first active material layer and the second active material layer Is a negative electrode active material layer, the third active material layer and the fourth active material layer are positive electrode active material layers, and the first active material layer and the second active material layer are positive electrode active material layers. In the case of a material layer, the third active material layer and the fourth active material layer are negative electrode active material layers,
At least the first current collector layer extends outside the third active material layer and the fourth active material layer to form an extended portion,
An insulating resin layer is continuously provided over one surface of the extension, the side surface of the extension, and the other surface of the extension,
All solid state battery. One surface of the insulating resin layer exists on the other side with respect to one surface of the third active material layer,
The other surface of the insulating resin layer exists on one side with respect to the other surface of the fourth active material layer.
The all-solid-state battery according to claim 1. The insulating resin layer exists only between the second current collector layer and the third current collector layer;
The all-solid-state battery according to claim 1. At least the first current collector layer, the first active material layer, and the second active material layer extend outward from the third active material layer and the fourth active material layer, and Constituting the extension part,
The all-solid-state battery according to claim 1. The first current collector layer, the first active material layer, the second active material layer, the first solid electrolyte layer and the second solid electrolyte layer are formed by the third active material layer and the second solid electrolyte layer. 4, extending outside the active material layer to constitute the extending portion,
The all-solid-state battery according to claim 1. The insulating resin layer is provided continuously on one surface of the first solid electrolyte layer, the side surface of the extending portion, and the other surface of the second solid electrolyte layer.
The all-solid-state battery according to claim 5. A pair of transfer rings arranged so that the transfer surfaces face each other with a gap therebetween,
A resin supply source for supplying an ultraviolet curable resin to the transfer surface of each of the transfer rings;
At least one ultraviolet light source that supplies ultraviolet light to at least the gap,
With
The end of the transferred object is configured to be disposed in the gap,
The ultraviolet curable resin supplied from the resin supply source to the transfer surface of the transfer ring is one side surface, the side surface, and the other side of the end of the object to be transferred from the transfer surface with the rotation of the transfer ring. It is configured to be simultaneously transferred over the surface,
The transferred ultraviolet curable resin is cured by ultraviolet light from the ultraviolet light source, and an insulating resin layer is continuously provided on one surface, side surface, and the other surface of the end of the transfer object. Have been
Resin coating device. The transfer ring has ultraviolet transmittance,
UV light emitted from the UV light source is configured to pass through the transfer ring and reach the gap,
The resin coating device according to claim 7. Further provided on the inside of the transfer surface is a reflecting mirror that reflects ultraviolet light from the ultraviolet light source,
Ultraviolet light emitted from the ultraviolet light source is configured to be reflected by the reflecting mirror, pass through the transfer ring, and reach the gap.
The resin coating device according to claim 8. The reflecting mirror is provided continuously and concentrically with the transfer ring inside the transfer surface,
The resin coating device according to claim 9. Comprising a plurality of said ultraviolet light sources,
Ultraviolet light emitted from some of the ultraviolet light sources is configured to pass through the transfer ring and reach a portion of the transfer surface other than the gap,
The ultraviolet curable resin supplied to the transfer surface from the resin supply source is partially cured on the transfer surface by the ultraviolet rays from a part of the ultraviolet light source before reaching the gap. It is configured,
The resin coating device according to claim 7. The wavelength of ultraviolet light emitted from some of the ultraviolet light sources and the wavelength of ultraviolet light emitted from the other ultraviolet light sources are different wavelengths,
The resin coating device according to claim 11. The ultraviolet-curable resin is a material that is cured by irradiating at least two wavelengths of ultraviolet light,
The resin coating device according to claim 11. The transfer surface is made of polytetrafluoroethylene or silicon,
The resin coating device according to any one of claims 7 to 13. The ultraviolet curable resin contains a filler,
The resin coating device according to claim 7. A roller is provided on the downstream side with respect to the transfer ring to assist in peeling the transferred object from the transfer surface,
The resin coating device according to any one of claims 7 to 15. Including a separation mechanism for increasing or decreasing the gap,
The resin coating device according to any one of claims 7 to 16. A notch is provided in at least one of the pair of transfer rings,
The resin coating device according to any one of claims 7 to 17. The transfer ring has a conveyor belt on the surface,
The surface of the conveyor belt is the transfer surface,
The surface of the conveyor belt is made of a material that is more excellent in releasability from the ultraviolet-curable resin than the surface of the end of the transfer-receiving member,
The resin coating device according to any one of claims 7 to 18. Laminating a first active material layer on one surface of the first current collector layer,
Stacking a second active material layer on the other surface of the first current collector layer;
Laminating a first solid electrolyte layer on one surface of the first active material layer,
Laminating a second solid electrolyte layer on the other surface of the second active material layer,
Stacking a third active material layer on one surface of the first solid electrolyte layer;
Stacking a fourth active material layer on the other surface of the second solid electrolyte layer,
The first active material layer and the second active material layer are any one of a negative electrode active material layer and a positive electrode active material layer, and the first active material layer and the second active material layer When a negative electrode active material layer is used, the third active material layer and the fourth active material layer are used as a positive electrode active material layer, and the first active material layer and the second active material layer are used as a positive electrode active material layer. In this case, the third active material layer and the fourth active material layer are used as a negative electrode active material layer,
At least the first active material layer and the second active material layer are extended outward from the third active material layer and the fourth active material layer to form an extension;
One side surface of the extending portion, the side surface of the extending portion, and the ultraviolet curable resin is continuously provided by transfer over the other surface of the extending portion,
Irradiating ultraviolet rays to the ultraviolet-cured resin transferred to the extending portion, the ultraviolet-cured resin is cured to form an insulating resin layer,
After providing the insulating resin layer on the extending portion, a second current collector layer is laminated on one surface of the third active material layer, and the second current collector layer is laminated on the other surface of the fourth active material layer. Stacking a third current collector layer,
Manufacturing method of all solid state battery.