BATTERY

Abstract

Conventional batteries offer room for improvement in terms of structural efficiency. The battery of the present invention includes a power generation part and a current collector part, and the current collector part includes an electrode mixture. In the battery, for example, a layer containing the electrode mixture in the current collector part may be bent together with a current collector.

Description

TECHNICAL FIELD

[0001] The present application discloses a battery. STATE OF THE ART

[0002] PTL 1 discloses a battery in which a power generation part and a terminal part are electrically connected via a current collector part (collector foil part). PTL 2 discloses an electrode for laminated batteries comprising a laminated electrode part and an electrode terminal part. CITATION LISTPATENT LITERATURE PTL 1 Unexamined Japanese Patent Publication No. 2019-160525 PTL 2 Unexamined Japanese Patent Publication No. 2019-207746 SUMMARYTECHNICAL PROBLEM

[0003] Conventional batteries offer room for improvement in terms of improving structural efficiency (volume efficiency). SOLUTION TO THE PROBLEM

[0004] The present application discloses the following plurality of aspects as means for achieving the above-mentioned object. <Aspekt 1 >

[0005] A battery comprising a power generating part and a power collecting part, wherein the current collector part comprises an electrode mixture. <Aspekt 2>

[0006] The battery according to aspect 1, wherein a layer comprising the electrode mixture is bent together with or bonded to a current collector in the current collector part. <Aspekt 3>

[0007] The battery according to aspect 2, wherein the layer which is bent together with the pantograph includes a sagging part. <Aspekt 4>

[0008] The battery according to aspect 2 or 3, wherein an end part of the layer, which is bent together with the current collector, is protected by a resin. <Aspekt 5>

[0009] The battery according to any one of aspects 1 to 4, wherein the power generation part comprises a positive electrode active material layer, an electrolyte layer and a negative electrode active material layer. <Aspekt 6>

[0010] The battery according to any one of aspects 1 to 5, wherein the current collector part comprises a positive electrode mixture. ADVANTAGEOUS EFFECTS OF THE INVENTION

[0011] The battery of the present invention has high structural efficiency. BRIEF DESCRIPTION OF THE DRAWINGS Fig. Figure 1 schematically shows a cross-sectional configuration of the battery. Features other than the power generation section and the current collection section are omitted. Fig. Figure 2 schematically shows a cross-sectional configuration of the electrode body forming the power generating part and the current collecting part. DESCRIPTION OF THE EMBODIMENTS

[0012] An embodiment of the battery of the present invention will be described below. However, the battery of the present invention is not limited to the following embodiment.

[0013] As in the Fig. 1 and Fig. 2, a battery 100 according to one embodiment includes a power generation part 10 and a current collection part 20. The current collection part 20 includes an electrode mixture. 1. Power generation part

[0014] The power generation part 10 includes an electrode body 11 as a power generation element. The power generation part 10 can be formed by layering a plurality of electrode bodies 11.

[0015] As in Fig. As shown in Figure 2, the electrode body 11 may comprise a first electrode current collector 11a, a first electrode active material layer 11b comprising a first electrode mixture, an electrolyte layer 11c, a second electrode active material layer 11d comprising a second electrode mixture, and a second electrode current collector 11e. In this case, the first electrode may be a positive electrode and the second electrode a negative electrode. Alternatively, the first electrode may be a negative electrode and the second electrode a positive electrode. The first electrode current collector 11a and / or the second electrode current collector 11e may protrude from a side surface 10z of the power generation part 10. In Fig. 1 shows an embodiment in which a plurality of current collectors 11a for the first electrode protrude from a side surface 10z of the power generation part 10. The current collectors protruding from a side surface 10z of the power generation part 10 can be bent and bundled to form a current collector part 20, which will be described below.

[0016] The number of layers of electrode bodies 11 in the power generation part 10 is not particularly limited. The power generation part 10 may have a partially bipolar structure. In the power generation part 10, an insulating layer may be provided between one electrode body 11 and another electrode body 11 to insulate the layered surfaces of the electrode bodies 11 from each other. As shown in Fig. As shown in Figure 1, the plurality of electrode bodies 11 can be electrically connected to one another via the current collector part 20. For example, the plurality of electrode bodies 11 can be electrically connected to one another in parallel via the current collector part 20.

[0017] The power generation part 10 may have an end surface 10x at one end side in the stacking direction of the layers described below, another end surface 10y at another end side in the stacking direction, and a side surface 10z connecting one end surface 10x and the other end surface 10y. The side surface 10z may be formed by the outer edges of the layers constituting the power generation part 10. In the power generation part 10, the side surface 10z may have unevenness or gaps because the stacking area of ​​each layer is different. The side surface 10z may have a surface along the stacking direction of the layers in the power generation part 10. The current collector part 20 described below may be formed by current collectors 11a protruding from the side surface 10z of the power generation part 10. The power generation part 10 as a whole may be, for example, plate-like or rectangular-parallelpiped-like.

[0018] As in Fig. As shown in Figure 1, the power generation part 10 may have a thickness T in the layering direction. The thickness T may be, for example, 5 mm or more and 300 mm or less, or 10 mm or more and 50 mm or less.

[0019] The following illustrates the case where the first electrode in the electrode body 11 constituting the power generation part 10 is a positive electrode and the second electrode is a negative electrode. In one embodiment, the power generation part 10 may include a positive electrode active material layer 11b, a solid electrolyte layer 11c, and a negative electrode active material layer 11d. Alternatively, in one embodiment, the power generation part 10 may include a positive electrode active material layer 11b, a liquid electrolyte layer 11c, and a negative electrode active material layer 11d. In particular, when the power generation part 10 includes a positive electrode active material layer 11b, a solid electrolyte layer 11c, and a negative electrode active material layer 11d, structural efficiency is likely to be further improved.The shape of the lamination surface of each layer constituting the power generation part 10 may be, for example, rectangular. 1.1 Positive electrode active material layer

[0020] The positive electrode active material layer 11b includes a positive electrode active material and may optionally further include an electrolyte, a conductive aid, and a binder. The content of the positive electrode active material, the electrolyte, the conductive aid, and the binder in the positive electrode active material layer 11b only needs to be appropriately determined according to the target battery performance. For example, if the total solid content of the positive electrode active material layer 11b is 100 mass percent, the content of the positive electrode active material may be 40 mass percent or more, 50 mass percent or more, 60 mass percent or more, and 100 mass percent or less, or 90 mass percent or less.The shape of the positive electrode active material layer 11b is not particularly limited and may, for example, be a sheet-like positive electrode active material layer 11b with a substantially flat surface. The thickness of the positive electrode active material layer 11b is not particularly limited and may, for example, be 0.1 µm or more, 1 µm or more, and 2 mm or less, or 1 mm or less.

[0021] For the positive electrode active material, any publicly known positive electrode active material for batteries can be used. When lithium ions are used as carrier ions, the positive electrode active material may be, for example, a Li-containing oxide. Specifically, the positive electrode active material may be a Li-containing oxide comprising at least one element M, Li, and O. The element M may be, for example, at least one selected from Mn, Ni, Co, Al, Mg, Ca, Sc, V, Cr, Cu, Zn, Ga, Ge, Y, Zr, Sn, Sb, W, Pb, Bi, Fe, and Ti, or at least one selected from the group consisting of Mn, Ni, Co, Al, Fe, and Ti.More specifically, the Li-containing oxide as an additional positive electrode active material may be at least one selected from lithium cobaltate, lithium nickelate, lithium manganate, lithium nickel-cobalt oxide, lithium nickel-manganese oxide, lithium cobalt-manganese oxide, lithium nickel-cobalt-manganese oxide (Li. 1±α Ni x Co y Mn z O 2±δ (for example, 0 < x < 1, 0 < y < 1, 0 < z < 1 and x + y + z = 1)), spinel-based lithium compounds (such as heteroelement-substituted Li-Mn spinels with a composition determined by Li 1+x Mn 2-x-y M y O4 (where M is one or more elements selected from Al, Mg, Co, Fe, Ni and Zn)), lithium nickel cobalt aluminum oxide (e.g. Li 1±α Ni p Co q Al r O 2±δ(e.g., p + q + r = 1)), lithium titanate, and lithium metal phosphates (such as LiMPO4, where M is one or more elements selected from the group consisting of Fe, Mn, Co, and Ni). The positive electrode active material may be of one type used alone or of two or more types used in combination. The shape of the positive electrode active material need only be any general shape of positive electrode active materials for batteries. For example, the positive electrode active material may be composed of particles. The positive electrode active material may consist of primary particles or secondary particles composed of a plurality of agglomerated primary particles. The average particle size D 50of the positive electrode active material may be, for example, 1 nm or more, 5 nm or more, or 10 nm or more, and 500 µm or less, 100 µm or less, 50 µm or less, or 30 µm or less. It should be noted that the average particle size D 50 , referred to in the present application, is the 50% cumulative particle size (average diameter) in a volume-based particle size distribution determined by a laser diffraction scattering method. A protective layer having ion-conducting properties may be formed on the surface of the positive electrode active material. The protective layer having ion-conducting properties may comprise various ion-conducting compounds. The ion-conducting compound is, for example, at least one compound selected from ion-conducting oxides and ion-conducting halides.

[0022] The electrolyte contained in the positive electrode active material layer 11b may be a solid electrolyte, a liquid electrolyte, or a combination thereof. In particular, when the positive electrode active material layer 11b comprises a solid electrolyte, structural efficiency is likely to be improved.

[0023] For the solid electrolyte contained in the positive electrode active material layer 11b, any publicly known solid electrolyte with carrier ion conducting properties can be used. The solid electrolyte can be an inorganic solid electrolyte or a polymer electrolyte. In particular, an inorganic solid electrolyte has excellent ion conducting properties and high heat resistance. Examples of the inorganic solid electrolyte include oxide solid electrolytes, sulfide solid electrolytes, and inorganic solid electrolytes with ion-binding properties. Among the inorganic solid electrolytes, sulfide solid electrolytes, including sulfide solid electrolytes containing at least Li, S, and P as components, exhibit high performance.Alternatively, among inorganic solid electrolytes, solid electrolytes with ionic bonding properties, including solid electrolytes containing at least Li, Y, and a halogen (at least one of Cl, Br, I, and F) as components, exhibit high performance. The solid electrolyte can be amorphous or crystalline. The solid electrolyte can be particulate. The average particle size D 50 of the solid electrolyte can be, for example, 10 nm or more and 10 µm or less.

[0024] The liquid electrolyte (electrolytic solution) that may be contained in the positive electrode active material layer 11b is a liquid containing carrier ions. The carrier ions may be, for example, lithium ions. The electrolytic solution may be a water-based electrolytic solution or a non-water-based electrolytic solution. The composition of the electrolytic solution is publicly known. The electrolytic solution may be a lithium salt dissolved in water or a non-water-based solvent. Examples of the non-water-based solvent include various carbonate-based solvents. Examples of the lithium salt include lithium amide and LiPF6.

[0025] Examples of the conductive aid that can be included in the positive electrode active material layer 11b include carbon materials such as vapor-grown carbon fibers (VGCF), acetylene black (AB), Ketjen black (KB), carbon nanotubes (CNT), and carbon nanofibers (CNF); and metallic materials such as nickel, titanium, aluminum, and stainless steel. The conductive aid can be, for example, particulate or fibrous, and its size is not particularly limited. The conductive aid can be of one type used alone, or it can be of two or more types used in combination.

[0026] Examples of the binder that can be included in the positive electrode active material layer 11b include butadiene rubber (BR)-based binders, butylene rubber (IIR)-based binders, acrylate butadiene rubber (ABR)-based binders, styrene butadiene rubber (SBR)-based binders, polyvinylidene fluoride (PVdF)-based binders, polytetrafluoroethylene (PTFE)-based binders, and polyimide (PI)-based binders. The binder may be of one type used alone, or two or more types may be used in combination. 1.2 Electrolyte layer

[0027] The electrolyte layer 11c is disposed between the positive electrode active material layer 11b and the negative electrode active material layer 11d. The electrolyte layer 11c includes at least one electrolyte and may optionally further include a binder. The content of the electrolyte and the binder in the electrolyte layer 11c is not particularly limited. Alternatively, the electrolyte layer 11c may include a separator to retain an electrolyte solution and prevent contact between the positive electrode active material layer 11b and the negative electrode active material layer 11d. The thickness of the electrolyte layer 11c is not particularly limited and may be, for example, 0.1 μm or more, 1 μm or more, and 2 mm or less, or 1 mm or less.

[0028] The electrolyte contained in the electrolyte layer 11c only needs to be appropriately selected from those (solid electrolytes and / or liquid electrolytes) exemplified as the electrolyte that can be contained in the above-described positive electrode active material layer 11b. Furthermore, the binder that can be contained in the electrolyte layer 11c only needs to be appropriately selected from those that can be contained as the binder in the above-described positive electrode active material layer. The electrolyte and the binder can each be of one type used alone or two or more types used in combination. The separator only needs to be a separator commonly used in batteries, and examples include those made of resins such as polyethylene (PE), polypropylene (PP), polyester, and polyamide.The separator can have a single-layer or multi-layer structure. Examples of separators with a multi-layer structure include separators with a two-layer PE / PP structure and separators with a three-layer PP / PE / PP or PE / PP / PE structure. The separator can be made of a nonwoven fabric such as cellulose fabric, resin nonwoven fabric, or glass fiber nonwoven fabric. 1.3 Negative electrode active material layer

[0029] The negative electrode active material layer 11d includes a negative electrode active material and may optionally further include an electrolyte, a conductive aid, and a binder. The content of each of the negative electrode active material, the electrolyte, the conductive aid, and the binder in the negative electrode active material layer 11d only needs to be appropriately determined according to the target battery performance. For example, if the total solid content of the negative electrode active material layer 11d is 100 mass percent, the content of the negative electrode active material may be 40 mass percent or more, 50 mass percent or more, 60 mass percent or more, and 100 mass percent or less, or 90 mass percent or less.The shape of the negative electrode active material layer 11d is not particularly limited and may, for example, be a sheet-like negative electrode active material layer 11d with a substantially flat surface. The thickness of the negative electrode active material layer 11d is not particularly limited and may, for example, be 0.1 μm or more, 1 μm or more, and 2 mm or less, or 1 mm or less.

[0030] For the negative electrode active material, any publicly known negative electrode active material for batteries can be used. Among the publicly known active materials, various materials with a low electric potential (charge and discharge potential) for storing and releasing carrier ions can be used compared to the above-mentioned positive electrode active material. When lithium ions are used as carrier ions, the negative electrode active material can include silicon-based active materials such as Si, Si alloys, and silicon oxides; carbon-based active materials such as graphite and hard carbon; various oxide-based active materials such as lithium titanate; and metallic lithium and lithium alloys.The negative electrode active material can be of one type used alone or of two or more types used in combination. The shape of the negative electrode active material only needs to be any general shape of negative electrode active material for batteries. For example, the negative electrode active material can be particulate. The particles of the negative electrode active material can be primary particles or secondary particles of a plurality of agglomerated primary particles. The average particle size D. 50The particle size of the negative electrode active material may be, for example, 1 nm or more, 5 nm or more, 10 nm or more, and 500 µm or less, 100 µm or less, 50 µm or less, or 30 µm or less. Alternatively, the negative electrode active material may be sheet-like (foil-like or membrane-like), such as a lithium foil. In particular, the negative electrode active material layer 11d may be composed of a negative electrode active material sheet.

[0031] Examples of the electrolyte that can be contained in the negative electrode active material layer 11d include the above-described solid electrolytes and electrolytic solutions, and combinations thereof. The conductive aid that can be contained in the negative electrode active material layer 11d, for example, only needs to be appropriately selected from those exemplified as the conductive aid that can be contained in the positive electrode active material layer described above. The binder that can be contained in the negative electrode active material layer, for example, only needs to be appropriately selected from those that can be contained as the binder in the positive electrode active material layer described above.The electrolyte, the conductive aid, and the binder may each be of one type used alone, or they may be of two or more types used in combination. 1.4 Current collector for the positive electrode

[0032] As in the Fig. 1 and Fig. As shown in FIG. 2, the battery 100 may include a positive electrode current collector 11a in contact with the positive electrode active material layer 11b. A part of the positive electrode current collector 11a may protrude from the power generation part 10 to form a current collector part 20. Any general positive electrode current collector for batteries may be used for the positive electrode current collector 11a. The positive electrode current collector 11a may have at least one shape selected from foil-like, plate-like, mesh-like, punched metal-like shapes, and a foam. The positive electrode current collector 11a may be made of a metal foil or a metal mesh. In particular, a metal foil has excellent handleability. The positive electrode current collector 11a may be made of a plurality of foils.Metals constituting the positive electrode current collector 11a include at least one selected from Cu, Ni, Cr, Au, Pt, Ag, Al, Fe, Ti, Zn, Co, V, Mg, Pb, Ge, In, Sn, Zr, and stainless steel. In particular, the positive electrode current collector 11a may contain aluminum to ensure oxidation resistance. The positive electrode current collector 11a may have a coating on its surface for adjusting resistance. For example, the positive electrode current collector 11a may have a carbon coating. The positive electrode current collector 11a may be a metal foil or a substrate coated or vapor-deposited with any of the metals described above. When the positive electrode current collector 11a is composed of a plurality of metal foils, a layer may be provided between the plurality of metal foils.The thickness of the positive electrode current collector 11a is not particularly limited and may be, for example, 0.1 μm or more, 1 μm or more, and 1 mm or less, or 100 μm or less. 1.5 Current collector for the negative electrode

[0033] As in the Fig. 1 and Fig. As shown in FIG. 2, the battery 100 may include a negative electrode current collector 11e in contact with the negative electrode active material layer 11d. A part of the negative electrode current collector 11e may protrude from the power generation part 10 to form a current collector part separate from the above current collector part 20. Any general negative electrode current collector for batteries can be used for the negative electrode current collector 11e. The negative electrode current collector 11e may be foil-like, plate-like, mesh-like, metal-like stamped, or a foam. The negative electrode current collector 11e may be a metal foil or a metal mesh, and alternatively, a carbon film. In particular, a metal foil has excellent handleability. The negative electrode current collector 11e may be formed of a plurality of foils or sheets.Metals constituting the negative electrode current collector 11e include at least one selected from Cu, Ni, Cr, Au, Pt, Ag, Al, Fe, Ti, Zn, Co, V, Mg, Pb, Ge, In, Sn, Zr, and stainless steel. Specifically, from the viewpoint of ensuring reduction resistance and preventing alloying with lithium, the negative electrode current collector 11e may include at least one metal selected from Cu, Ni, and stainless steel. The negative electrode current collector 11e may include a layer on its surface for the purpose of adjusting resistance. For example, the negative electrode current collector 11e may have a carbon coating. The negative electrode current collector 11e may be an aluminum foil with a carbon coating. The negative electrode current collector 11e may be a metal foil or a substrate coated or vapor-deposited with any of the metals described above.When the negative electrode current collector 11e is composed of a plurality of metal foils, a layer may be provided between the plurality of metal foils. The thickness of the negative electrode current collector 11e is not particularly limited and may be, for example, 0.1 μm or more, 1 μm or more, 1 mm or less, or 100 μm or less. 2. Pantograph part

[0034] In the current collector part 20, a plurality of current collectors 11a protruding from the power generation part 10 are electrically connected. For example, projections of the plurality of current collectors 11a are bent and bundled together, whereby the current collector part 20 can be formed.

[0035] In the prior art, to ensure capacitance and insulation, an electrolyte layer is disposed on a sagging portion of the first electrode active material layer, and further, a sagging portion of the second electrode active material layer is formed on top of and inward from the sagging portion of the first electrode active material layer. Additionally, in the prior art, the current collector (flat plug) is bent outward from the sagging portion to form the current collector portion to prevent the electrode active material layer from slipping off. This deteriorates the structural efficiency of the current collector portion and the area around the sagging portions.

[0036] In the battery 100 according to the present embodiment, the current collecting part 20 includes an electrode mixture. "Electrode mixture" refers to a mixture that forms an electrode body 11, and is, for example, at least one of a positive electrode mixture that forms the above-described positive electrode active material layer 11b, a solid electrolyte mixture that forms the solid electrolyte layer when the electrolyte layer 11c is a solid electrolyte layer, and a negative electrode mixture that forms the negative electrode active material layer 11d. In one embodiment, the current collecting part 20 may include a positive electrode mixture. In one embodiment, the current collecting part 20 may include a negative electrode mixture.When the current collector part 20 includes an electrode mixture, the structural efficiency of the current collector part 20 can be improved compared to the case where the current collector part 20 does not include an electrode mixture.

[0037] As in areas X in the Fig. 1 and Fig. 2, in the battery 100, end portions of the positive electrode active material layer 11b, the electrolyte layer 11c, and / or the negative electrode active material layer 11d extend into the current collector part 20, and the positive electrode active material layer 11b, the electrolyte layer 11c, and / or the negative electrode active material layer 11d and / or the negative electrode active material layer 11d extend to the bent portions of the current collectors 11a in the current collector part 20. In other words, in the battery 100, the layers comprising the electrode mixture (positive electrode active material layer 11b and / or negative electrode active material layer 11d) in the current collector part 20 can be bent together with the current collectors 11a.

[0038] In the battery 100, the layers (positive electrode active material layer 11b, electrolyte layer 11c, and / or negative electrode active material layer 11d) that are bent together with the current collectors 11a may have a sagging portion. Fig. 2 shows an embodiment in which the positive electrode active material layer 11b and the electrolyte layer 11c each have sagging portions 11bx and 11cx. ​​However, the embodiment of the sagging portion is not limited to this. "Sagging portion" refers to an inclined portion formed at an end portion of a layer when the layer is formed by an application method (see, for example, Japanese Unexamined Patent Publication (Kokai) No. 2015-220216 and Japanese Unexamined Patent Publication (Kokai) No. 2014-096302). A sagging portion of the layer is generally thinner than parts of the layer other than the sagging portion. Therefore, the sagging portion of the layer is easier to bend than parts of the layer other than the sagging portion.

[0039] As in Fig. As shown in FIG. 2, in the battery 100, end portions of the layers (positive electrode active material layer 11b, electrolyte layer 11c, and / or negative electrode active material layer 11d) that are bent together with the current collectors 11a can be protected by a resin 11f. Consequently, the ends of the layers are less likely to peel off or slip off even when the layers are bent together with the current collectors 11a. The type of the resin 11f is not particularly limited, and various thermosetting resins can be used. The resin 11f can be formed simultaneously with the layers 11b to 11d, before the layers 11b to 11d, or after the layers 11b to 11d.

[0040] As in Fig.1, the current collector part 20 may include an electrode mixture in a range from a side surface 10z of the power generation part 10 to a length L. The current collector part 20 may have a length L2 from the side surface 10z of the power generation part 10 to the tip (the part farthest from the side surface 10z of the power generation part 10 before being connected to a terminal) of the current collector part 20. The length L1 may be, for example, 1.0 mm or more and 10.0 mm or less. The length L2 may be, for example, 1.1 mm or more and 100 mm or less. The ratio L1 / L2 between the length L1 and the length L2 may be, for example, 0.1 or more and less than 1. When the dimensions of the current collector part 20 are within these ranges, the structural efficiency of the battery 100 is likely to be further improved. 3. Additional features

[0041] The battery 100 may, in addition to the above features, include any general feature of a battery, such as terminals or an outer packaging. Specifically for the battery 100, the above-mentioned current collector part 20 may be connected to terminals, and the above-mentioned features may be housed in an outer packaging. Any publicly known terminal may be used as the terminal of the battery. Any publicly known outer packaging may be used as the outer packaging of the battery. In addition, a plurality of batteries 100 may optionally be electrically connected and optionally stacked to form a battery pack. In this case, the battery pack may be housed in a publicly known battery case. Examples of shapes of the battery 100 may include button cell and stacked batteries. The battery 100 may be a secondary battery.The battery 100 may be a solid-state battery. 4. Battery manufacturing process

[0042] The battery 100 can be manufactured, for example, as follows. (1) A positive electrode mixture forming a positive electrode active material layer is dispersed in a solvent to obtain a positive electrode layer slurry. The solvent used in this case is not particularly limited, and water and various organic solvents can be used. The positive electrode layer slurry is applied to the surface of a positive electrode current collector with a doctor blade and then dried, thereby forming a positive electrode active material layer on the surface of the positive electrode current collector to obtain a positive electrode. (2) A negative electrode mixture or negative electrode mixture forming a negative electrode active material layer is dispersed in a solvent to obtain a negative electrode layer slurry. The solvent used in this case is not particularly limited, and water and various organic solvents can be used. The negative electrode layer slurry is applied to the surface of a negative electrode current collector with a doctor blade and then dried, thereby forming a negative electrode active material layer on the surface of the negative electrode current collector to obtain a negative electrode. (3) The layers are stacked so that an electrolyte layer (solid electrolyte layer or separator) is interposed between the negative electrode and the positive electrode to obtain an electrode body comprising, in the following order, a negative electrode current collector, a negative electrode active material layer, an electrolyte layer, a positive electrode active material layer, and a positive electrode current collector. (4) A plurality of electrode bodies are arranged in layers to form a power generation part. In this case, a plurality of current collectors are arranged to protrude from a side surface of the power generation part. (5) The current collectors projecting from the power generation part are each bent together with the electrode mixture, and the plurality of current collectors are bundled together to form a current collector part. (6) Additional elements such as terminals are attached to the current collector part as needed. The power generation part and the current collector part are housed in a battery case. In the case of an electrolytic solution battery, the battery case is filled with an electrolytic solution, each part is immersed in the electrolytic solution, and the battery case is sealed, thus obtaining a battery. It should be noted that in the case of an electrolytic solution battery, before each part is placed in the battery case, the electrolytic solution may be contained in the negative electrode active material layer, the separator, and the positive electrode active material layer. 5. Application

[0043] The battery 100 has a variety of applications. For example, the battery 100 can be used in at least one type of vehicle selected from hybrid electric vehicles (HEVs), plug-in hybrid electric vehicles (PHEVs), and electric vehicles (BEVs). In particular, the technique of the present invention also has an aspect as a vehicle incorporating the above battery 100 of the present invention. LIST OF REFERENCE SYMBOLS 100 batteries 10 Power generation part 10x one end face in layering direction 10y other end face in layering direction 10z side surface 11 Electrode body 11a Current collector for the first electrode 11b Layer of active material of the first electrode 11bx sagging part 11c Electrolyte layer 11cx sagging part 11d Layer of active material of the second electrode 11e Current collector for the second electrode 11f Harz 20 pantograph part QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] JP 2019-207746

[0002] JP 2015-220216

[0038] JP 2014-096302

[0038]

Claims

[1] A battery comprising a power generating part and a current collecting part, wherein the current collecting part comprises an electrode mixture. [2] The battery according to claim 1, wherein a layer comprising the electrode mixture is bent together with a current collector in the current collector part. [3] The battery according to claim 2, wherein the layer bent together with the current collector includes a sagging part. [4] A battery according to claim 2 or 3, wherein an end part of the layer which is bent together with the current collector is protected by a resin. [5] The battery according to any one of claims 1 to 4, wherein the power generation part comprises a positive electrode active material layer, a solid electrolyte layer and a negative electrode active material layer. [6] A battery according to any one of claims 1 to 5, wherein the current collecting part comprises a positive electrode mixture.

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