Battery

Abstract

To improve existing batteries with respect to enhancing structural efficiency.SOLUTION: A battery 100 of the present disclosure includes: a power generation unit 10; and a current collecting unit 20, the current collecting unit 20 including an electrode mixture. In the current collecting unit 20, layers 11b to 11d including the electrode mixture may be bent together with a current collector 11a.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present application discloses a battery. [Background technology]

[0002] Patent Document 1 discloses a battery in which a power generating section and a terminal section are electrically connected via a current collecting section (foil collecting section). Patent Document 2 discloses an electrode for a stacked battery having an electrode stack section and an electrode terminal section. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-160525 [Patent Document 2] Japanese Patent Application Publication No. 2019-207746 Summary of the Invention [Problem to be solved by the invention]

[0004] Conventional batteries have room for improvement in terms of improving structural efficiency (volumetric efficiency). [Means for solving the problem]

[0005] The present application discloses the following aspects as means for solving the above problems. <Aspect 1> A battery having a power generating section and a current collecting section, The current collecting portion includes an electrode mixture. battery. <Aspect 2> 2. The battery of embodiment 1, In the current collecting portion, the layer containing the electrode mixture is bent together with the current collector. battery. <Aspect 3> The battery of aspect 2, The layer bent together with the current collector includes a sagging portion. battery. <Aspect 4> 4. The battery of aspect 2 or 3, The edge of the layer bent together with the current collector is protected by a resin. battery. <Aspect 5> The battery of any one of Aspects 1 to 4, the power generation unit includes a positive electrode active material layer, a solid electrolyte layer, and a negative electrode active material layer; battery. <Aspect 6> The battery of any one of Aspects 1 to 5, The current collecting portion includes a positive electrode mixture. battery. [Effects of the Invention]

[0006] The batteries of the present disclosure have high structural efficiency. [Brief explanation of the drawings]

[0007] [Figure 1] The cross-sectional structure of the battery is shown in a simplified manner, with the components other than the power generating section and the current collecting section omitted. [Figure 2] 2 shows a schematic cross-sectional configuration of an electrode body that constitutes a power generating section and a current collecting section. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, one embodiment of the battery of the present disclosure will be described, but the battery of the present disclosure is not limited to the following embodiment.

[0009] 1 and 2, a battery 100 according to one embodiment includes a power generating section 10 and a current collecting section 20. The current collecting section 20 includes an electrode mixture.

[0010] 2.1 Power generation section The power generating section 10 has an electrode body 11 as a power generating element. The power generating section 10 may be formed by stacking a plurality of electrode bodies 11.

[0011] As shown in FIG. 2, the electrode assembly 11 may include a first electrode current collector 11a, a first electrode active material layer 11b containing a first electrode composite, an electrolyte layer 11c, a second electrode active material layer 11d containing a second electrode composite, and a second electrode current collector 11e. In this case, the first electrode may be a positive electrode and the second electrode may be a negative electrode. Alternatively, the first electrode may be a negative electrode and the second electrode may be a positive electrode. One or both of the first electrode current collector 11a and the second electrode current collector 11e may protrude from the side surface 10z of the power generation unit 10. FIG. 1 illustrates an example in which multiple first electrode current collectors 11a protrude from the side surface 10z of the power generation unit 10. The current collectors protruding from the side surface 10z of the power generation unit 10 may be bent, bundled together, or the like to form the current collecting unit 20, which will be described later.

[0012] The number of stacked electrode bodies 11 in the power generation unit 10 is not particularly limited. The power generation unit 10 may have a bipolar structure in part. Furthermore, in the power generation unit 10, stacked surfaces of the electrode bodies 11 may be insulated from each other by providing an insulating layer between one electrode body 11 and another electrode body 11, for example. As shown in FIG. 1 , the plurality of electrode bodies 11 may be electrically connected to each other by the current collecting unit 20. For example, the plurality of electrode bodies 11 may be electrically connected to each other in parallel by the current collecting unit 20.

[0013] The power generating unit 10 may have one end face 10x at one end of the stacking direction of each layer described below, another end face 10y at the other end of the stacking direction, and a side face 10z connecting the one end face 10x and the other end face 10y. The side face 10z may be formed by the outer edge of each layer constituting the power generating unit 10. In the power generating unit 10, the stacking areas of the layers may differ, so the side face 10z may have irregularities or gaps. Furthermore, the side face 10z may have a surface along the stacking direction of the layers in the power generating unit 10. Furthermore, the current collecting unit 20 described below may be formed by a current collector 11a protruding from the side face 10z of the power generating unit 10. The power generating unit 10 may be, for example, plate-shaped or rectangular parallelepiped-shaped as a whole.

[0014] 1, the power generating section 10 may have a thickness T in the stacking direction of each layer. 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.

[0015] The following describes an example in which the first electrode of the electrode assembly 11 constituting the power generation unit 10 is a positive electrode and the second electrode is a negative electrode. In one embodiment, the power generation unit 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 unit 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 unit 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 stacking surface of each layer constituting the power generation unit 10 may be, for example, rectangular.

[0016] 2.1.1 Cathode active material layer The positive electrode active material layer 11b contains a positive electrode active material and may further contain, optionally, an electrolyte, a conductive additive, a binder, and the like. The contents of the positive electrode active material, electrolyte, conductive additive, binder, and the like in the positive electrode active material layer 11b may be appropriately determined depending on the desired battery performance. For example, the content of the positive electrode active material may be 40% by mass or more, 50% by mass or more, or 60% by mass or more, or 100% by mass or less, or 90% by mass or less, where the entire positive electrode active material layer 11b (total solid content) is taken as 100% by mass. The shape of the positive electrode active material layer 11b is not particularly limited, and may be, for example, a sheet-like positive electrode active material layer 11b having a substantially flat surface. The thickness of the positive electrode active material layer 11b is not particularly limited, and may be, for example, 0.1 μm or more or 1 μm or more, and 2 mm or less or 1 mm or less.

[0017] Any known materials can be adopted as the positive electrode active material of the battery. When lithium ions are adopted 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 containing 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, other Li-containing oxides as positive electrode active materials include lithium cobalt oxide, lithium nickel oxide, lithium manganate, lithium nickel cobalt oxide, lithium nickel manganate, lithium cobalt manganate, lithium nickel cobalt manganate (Li 1±α Ni x Co y Mn z O 2±δ (for example, 0 < x < 1, 0 < y < 1, 0 < z < 1, x + y + z = 1)), spinel-type lithium compounds (Li 1+x Mn 2-x-y M y O4 (M is one or more selected from Al, Mg, Co, Fe, Ni, and Zn), such as hetero-element-substituted Li-Mn spinel with a composition represented by this formula), lithium nickel cobalt aluminum oxide (for example, Li 1±α Ni p Co q Al r O 2±δThe positive electrode active material may be at least one selected from the group consisting of lithium phosphate (e.g., LiMPO4, where M is one or more selected from Fe, Mn, Co, and Ni), lithium titanate, and lithium metal phosphate (e.g., LiMPO4, where M is one or more selected from Fe, Mn, Co, and Ni). Only one positive electrode active material may be used alone, or two or more positive electrode active materials may be used in combination. The positive electrode active material may have any shape commonly used for positive electrode active materials in batteries. The positive electrode active material may be, for example, particulate. The positive electrode active material may be primary particles or secondary particles formed by aggregation of multiple primary particles. The positive electrode active material may have an average particle diameter D50 of, for example, 1 nm or more, 5 nm or more, or 10 nm or more, or may be 500 μm or less, 100 μm or less, 50 μm or less, or 30 μm or less. The average particle diameter D50 referred to in this application is the particle diameter (median diameter) at 50% of the cumulative value in a volume-based particle size distribution determined by a laser diffraction / scattering method. An ion-conductive protective layer may be formed on the surface of the positive electrode active material. The ion-conductive protective layer may contain various ion-conductive compounds. The ion-conductive compound may be, for example, at least one selected from ion-conductive oxides and ion-conductive halides.

[0018] The electrolyte that can be 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 contains a solid electrolyte, it is easy to improve the structural efficiency.

[0019] The solid electrolyte that can be contained in the positive electrode active material layer 11b can be any known solid electrolyte having carrier ion conductivity. The solid electrolyte may be an inorganic solid electrolyte or an organic polymer electrolyte. In particular, inorganic solid electrolytes have excellent ion conductivity and heat resistance. Examples of inorganic solid electrolytes include oxide solid electrolytes, sulfide solid electrolytes, and ionically bonded inorganic solid electrolytes. Among inorganic solid electrolytes, sulfide solid electrolytes, and sulfide solid electrolytes containing at least Li, S, and P as constituent elements, exhibit high performance. Alternatively, among inorganic solid electrolytes, ionically bonded solid electrolytes, and solid electrolytes containing at least Li, Y, and a halogen (at least one of Cl, Br, I, and F) as constituent elements exhibit high performance. The solid electrolyte may be amorphous or crystalline. The solid electrolyte may be particulate. The average particle diameter D50 of the solid electrolyte may be, for example, 10 nm or more and 10 μm or less.

[0020] The liquid electrolyte (electrolytic solution) that can 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 an aqueous electrolytic solution or a non-aqueous electrolytic solution. The composition of the electrolytic solution is known. The electrolytic solution may be one in which a lithium salt is dissolved in water or a non-aqueous solvent. Examples of non-aqueous solvents include various carbonate-based solvents. Examples of lithium salts include lithium amide salts and LiPF6.

[0021] Examples of conductive additives that can be contained in the positive electrode active material layer 11b include carbon materials such as vapor grown carbon fiber (VGCF), acetylene black (AB), ketjen black (KB), carbon nanotubes (CNT), and carbon nanofibers (CNF); and metal materials such as nickel, titanium, aluminum, and stainless steel. The conductive additive may be, for example, in the form of particles or fibers, and its size is not particularly limited. Only one type of conductive additive may be used alone, or two or more types may be used in combination.

[0022] Examples of binders that can be contained 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, polyimide (PI)-based binders, etc. Only one type of binder may be used alone, or two or more types may be used in combination.

[0023] 1.1.2 Electrolyte layer 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 contains at least an electrolyte and may further contain, optionally, a binder or the like. The contents of the electrolyte and binder or the like in the electrolyte layer 11c are not particularly limited. Alternatively, the electrolyte layer 11c may have a separator or the like for retaining the electrolytic solution and preventing 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 or 1 μm or more, or 2 mm or less or 1 mm or less.

[0024] The electrolyte contained in the electrolyte layer 11c may be appropriately selected from the electrolytes (solid electrolytes and / or liquid electrolytes) exemplified above as electrolytes that can be contained in the positive electrode active material layer 11b. The binder contained in the electrolyte layer 11c may also be appropriately selected from the binders exemplified above as binders that can be contained in the positive electrode active material layer. Each of the electrolytes and binders may be used alone or in combination of two or more. The separator may be any separator commonly used in batteries, such as those made of resins such as polyethylene (PE), polypropylene (PP), polyester, and polyamide. The separator may have a single-layer structure or a multi-layer structure. Examples of multi-layer separators include a two-layer structure of PE / PP, or a three-layer structure of PP / PE / PP or PE / PP / PE. The separator may be made of a nonwoven fabric such as a cellulose nonwoven fabric, a resin nonwoven fabric, or a glass fiber nonwoven fabric.

[0025] 1.1.3 Negative electrode active material layer The negative electrode active material layer 11d contains a negative electrode active material and may further contain, optionally, an electrolyte, a conductive additive, a binder, and the like. The contents of the positive electrode active material, electrolyte, conductive additive, binder, and the like in the negative electrode active material layer 11d may be appropriately determined depending on the target battery performance. For example, the content of the negative electrode active material may be 40% by mass or more, 50% by mass or more, or 60% by mass or more, or 100% by mass or less, or 90% by mass or less, where the total weight of the negative electrode active material layer 11d (total solid content) is taken as 100% by mass. The shape of the negative electrode active material layer 11d is not particularly limited, and may be, for example, a substantially flat sheet-like negative electrode active material layer 11d. The thickness of the negative electrode active material layer 11d is not particularly limited, and may be, for example, 0.1 μm or more or 1 μm or more, and 2 mm or less or 1 mm or less.

[0026] The negative electrode active material may be any of those known as negative electrode active materials for batteries. Among known active materials, various materials may be used whose potential for absorbing and releasing carrier ions (charge / discharge potential) is lower than that of the positive electrode active material. When lithium ions are used as carrier ions, examples of the negative electrode active material that may be used include silicon-based active materials such as Si, Si alloys, and silicon oxide; carbon-based active materials such as graphite and hard carbon; various oxide-based active materials such as lithium titanate; metallic lithium and lithium alloys. Only one type of negative electrode active material may be used alone, or two or more types may be used in combination. The shape of the negative electrode active material may be any shape commonly used for negative electrode active materials for batteries. For example, the negative electrode active material may be in the form of particles. The negative electrode active material particles may be primary particles or secondary particles formed by agglomeration of multiple primary particles. The average particle diameter D50 of the negative electrode active material particles may be, for example, 1 nm or more, 5 nm or more, or 10 nm or more, and may be 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 in the form of a sheet (foil or film) such as lithium foil. That is, the negative electrode active material layer 11d may be made of a sheet of negative electrode active material.

[0027] Examples of electrolytes that can be contained in the negative electrode active material layer 11d include the above-mentioned solid electrolytes, electrolytic solutions, and combinations thereof. The conductive additives that can be contained in the negative electrode active material layer 11d may be appropriately selected from, for example, the conductive additives that can be contained in the above-mentioned positive electrode active material layer. The binders that can be contained in the negative electrode active material layer 11d may be appropriately selected from, for example, the binders that can be contained in the above-mentioned positive electrode active material layer. Each of the electrolytes, conductive additives, and binders may be used alone or in combination of two or more.

[0028] 1.1.4 Positive electrode current collector As shown in FIGS. 1 and 2, the battery 100 may include a positive electrode current collector 11a in contact with the positive electrode active material layer 11b. A portion of the positive electrode current collector 11a may protrude from the power generation section 10 to form the current collector section 20. Any common positive electrode current collector for batteries may be used as the positive electrode current collector 11a. The positive electrode current collector 11a may have at least one shape selected from foil, plate, mesh, punched metal, and foam. The positive electrode current collector 11a may be made of metal foil or metal mesh. Metal foil is particularly easy to handle. The positive electrode current collector 11a may be made of multiple foils. The positive electrode current collector 11a may be made of at least one metal 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 Al to ensure oxidation resistance. The positive electrode current collector 11a may have a coating layer on its surface for purposes such as adjusting resistance. For example, the positive electrode current collector 11a may have a carbon coating layer. The positive electrode current collector 11a may also be a metal foil or a substrate plated or vapor-deposited with the above metal. When the positive electrode current collector 11a is made of multiple metal foils, some layer may be present between the multiple metal foils. The thickness of the positive electrode current collector 11a is not particularly limited. For example, it may be 0.1 μm or more or 1 μm or more, or 1 mm or less or 100 μm or less.

[0029] 1.1.5 Negative electrode current collector As shown in FIGS. 1 and 2, the battery 100 may include a negative electrode current collector 11e in contact with the negative electrode active material layer 11d. A portion of the negative electrode current collector 11e may protrude from the power generation unit 10 to constitute a current collector separate from the current collector 20. The negative electrode current collector 11e may be any common negative electrode current collector for batteries. The negative electrode current collector 11e may be in the form of a foil, plate, mesh, punched metal, foam, or the like. The negative electrode current collector 11e may be a metal foil or metal mesh, or may be a carbon sheet. Metal foil is particularly easy to handle. The negative electrode current collector 11e may be made of multiple foils or sheets. Examples of the metal 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. In particular, from the viewpoint of ensuring reduction resistance and being less likely to be alloyed with lithium, the negative electrode current collector 11e may contain at least one metal selected from Cu, Ni, and stainless steel. The negative electrode current collector 11e may have a coating layer on its surface for purposes such as adjusting resistance. For example, the negative electrode current collector 11e may have a carbon coating layer. The negative electrode current collector 11e may be an aluminum foil having a carbon coating layer. The negative electrode current collector 11e may also be a metal foil or a substrate plated or vapor-deposited with the above metal. When the negative electrode current collector 11e is made of multiple metal foils, some layer may be present between the multiple 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 or 1 μm or more, or 1 mm or less or 100 μm or less.

[0030] 2. Current collecting section In the current collecting unit 20, a plurality of current collectors 11a protruding from the power generating unit 10 are electrically connected. For example, the current collecting unit 20 can be configured by bending the protruding portions of the plurality of current collectors 11a and bundling them together.

[0031] In the past, to ensure capacity and for insulation, an electrolyte layer was placed on top of the sagging portion of the first electrode active material layer, and a sagging portion of the second electrode active material layer was formed on top of that, inside the sagging portion of the first electrode active material layer. In addition, in the past, to prevent the electrode active material layer from sliding off, the current collecting portion was constructed by bending the current collector (tab) outside the sagging portion. As a result, the structural efficiency of the current collecting portion and the area around the sagging portion was deteriorated.

[0032] In contrast, in the battery 100 according to this embodiment, the current collecting part 20 includes an electrode composite. The "electrode composite" refers to a composite that constitutes the electrode body 11, and is, for example, at least one of the positive electrode composite that constitutes the above-described positive electrode active material layer 11b, the solid electrolyte composite that constitutes the solid electrolyte layer 11c when the electrolyte layer 11c is a solid electrolyte layer, and the negative electrode composite that constitutes the negative electrode active material layer 11d. In one embodiment, the current collecting part 20 may include a positive electrode composite. In another embodiment, the current collecting part 20 may include a negative electrode composite. When the current collecting part 20 includes an electrode composite, the structural efficiency of the current collecting part 20 can be improved compared to when the current collecting part 20 does not include an electrode composite.

[0033] 1 and 2, in the battery 100, the ends 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 collecting part 20, and the positive electrode active material layer 11b, the electrolyte layer 11c, and / or the negative electrode active material layer 11d extend into the bent portion of the current collector 11a in the current collecting part 20. In other words, in the battery 100, the layer containing the electrode mixture (the positive electrode active material layer 11b and / or the negative electrode active material layer 11d) may be bent together with the current collector 11a in the current collecting part 20.

[0034] In the battery 100, the layers (the positive electrode active material layer 11b, the electrolyte layer 11c, and / or the negative electrode active material layer 11d) that are bent together with the current collector 11a may include sagging portions. While FIG. 2 illustrates an example in which the positive electrode active material layer 11b and the electrolyte layer 11c have sagging portions 11bx and 11cx, the shape of the sagging portions is not limited thereto. The term "sagging portion" refers to an inclined portion formed at the end of a layer when the layer is formed by a coating method or the like (see, for example, JP 2015-220216 A and JP 2014-096302 A). The sagging portion of the layer is usually thinner than the remaining portion of the layer. Therefore, the sagging portion of the layer is easier to bend than the remaining portion of the layer.

[0035] As shown in FIG. 2, in the battery 100, the ends 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 collector 11a may be protected by resin 11f. This makes it difficult for the ends of the layers to peel off or slip off, even if the layers are bent together with the current collector 11a. The type of resin 11f is not particularly limited, and various curable resins can be used. The resin 11f may be formed at the same time as the layers 11b to 11d, or may be formed before or after the layers 11b to 11d.

[0036] As shown in FIG. 1 , the current collecting section 20 may include an electrode composite within a range of length L1 from the side surface 10z of the power generating section 10. The current collecting section 20 may also have a length L2 from the side surface 10z of the power generating section 10 to the tip of the current collecting section 20 (the portion of the power generating section 10 farthest from the side surface 10z before being connected to the terminal). 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 of the length L1 to the length L2 may be, for example, 0.1 or more and less than 1. When the dimensions of the current collecting section 20 are within these ranges, the structural efficiency of the battery 100 is likely to be further improved.

[0037] 3. Other configurations In addition to the above configuration, the battery 100 may also have general battery configurations. For example, terminals, an exterior body, etc. That is, the battery 100 may have the current collecting section 20 connected to the terminals, or may have the above configurations housed inside the exterior body. Any known battery terminals can be used as the terminals. Any known battery exterior body can be used as the exterior body. Furthermore, multiple batteries 100 may be electrically connected and stacked in any desired manner to form an assembled battery. In this case, the assembled battery may be housed inside a known battery case. Examples of the shape of the battery 100 include a coin type and a laminate type. The battery 100 may be a secondary battery. The battery 100 may be an all-solid-state battery.

[0038] 4. Battery manufacturing method The battery 100 can be manufactured, for example, as follows. (1) A positive electrode mixture constituting the 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 or various organic solvents can be used. The positive electrode layer slurry is applied to the surface of a positive electrode current collector using a doctor blade or the like, and then dried to form a positive electrode active material layer on the surface of the positive electrode current collector, resulting in a positive electrode. (2) The negative electrode mixture constituting the 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 or various organic solvents can be used. The negative electrode layer slurry is applied to the surface of the negative electrode current collector using a doctor blade or the like, and then dried to form a negative electrode active material layer on the surface of the negative electrode current collector, thereby forming a negative electrode. (3) The layers are stacked so that the electrolyte layer (solid electrolyte layer or separator) is sandwiched between the negative electrode and the positive electrode to obtain an electrode body having, in this 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 power generating section is obtained by stacking a plurality of electrode assemblies, with a plurality of current collectors protruding from the side surfaces of the power generating section. (5) The current collectors protruding from the power generating section are bent together with the electrode composite, and multiple current collectors are bundled together to form the current collecting section. (6) Other components such as terminals are attached to the current collector as needed, and the power generation unit and current collector are housed in a battery case. In the case of an electrolyte battery, the battery case is filled with electrolyte, and the battery case is sealed so that each part is immersed in the electrolyte, to complete the battery. In the case of an electrolyte battery, the negative electrode active material layer, separator, and positive electrode active material layer may be impregnated with electrolyte before the parts are housed in the battery case.

[0039] 5.Applications Battery 100 has a wide range of applications. For example, battery 100 can be suitably used in at least one type of vehicle selected from a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (PHEV), and an electric vehicle (BEV). In other words, the technology of the present disclosure also has an aspect of a vehicle having battery 100 of the present disclosure. [Explanation of symbols]

[0040] 100 batteries 10 Power Generation Department 10x One end face in stacking direction 10y Other end face in stacking direction 10z side 11 Electrode body 11a First electrode current collector 11b First electrode active material layer 11bx sagging part 11c electrolyte layer 11cx sagging part 11d Second electrode active material layer 11e Second electrode current collector 11f Resin 20 Current collector

Claims

1. A battery having a power generating section and a current collecting section, The current collecting portion includes an electrode mixture. battery.

2. 10. The battery of claim 1, In the current collecting portion, the layer containing the electrode mixture is bent together with the current collector. battery.

3. 3. The battery of claim 2, The layer bent together with the current collector includes a sagging portion. battery.

4. 3. The battery of claim 2, The edge of the layer bent together with the current collector is protected by a resin. battery.

5. The battery according to any one of claims 1 to 4, the power generation unit includes a positive electrode active material layer, a solid electrolyte layer, and a negative electrode active material layer; battery.

6. The battery according to any one of claims 1 to 4, The current collecting portion includes a positive electrode mixture. battery.

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