Abstract: A method of manufacturing an all solid-state secondary battery includes a positive electrode layer forming process, an electrolyte layer laminating process, a first compression process, an intermediate layer laminating process, a second compression process, a negative electrode layer laminating process, and a third compression process. A second pressure in the second compression process is higher than each of a first pressure in the first compression process and a third pressure in the third compression process.

Abstract: The invention provides a method for manufacturing a solid-state secondary battery including a multilayer electrode structure including a negative electrode layer, an intermediate layer, a solid electrolyte layer, and a positive electrode layer stacked in order. The method includes a step 1A including pressure-bonding a negative electrode layer and an intermediate layer to form a stack of the negative electrode layer and the intermediate layer; a step 1B including pressure-bonding the intermediate layer of the stack and a solid electrolyte layer to form a stack of the negative electrode layer, the intermediate layer, and the solid electrolyte layer; and a step 1C including pressure-bonding the solid electrolyte layer of the stack and a positive electrode layer to form the multilayer electrode structure.

Abstract: A method of manufacturing an all solid-state secondary battery includes a positive electrode layer forming process, a first compression process, an electrolyte layer laminating process, a second compression process, an intermediate layer laminating process, a third compression process, an integrating process, and a fourth compression process. A second pressure in the second compression process is higher than each of a first pressure in the first compression process, a third pressure in the third compression process, and a fourth pressure in the fourth compression process.

Abstract: The solid electrolyte sheet of the present invention includes an inner layer, a first outer layer stacked on one surface of the inner layer, and a second outer layer stacked on the other surface of the inner layer. The inner layer includes a porous base material and an inner layer solid electrolyte composition filled in the porous base material. The inner layer solid electrolyte composition contains a solid electrolyte material and a binder. The first outer layer includes a first outer layer solid electrolyte composition containing a solid electrolyte material and a binder. The second outer layer includes a second outer layer solid electrolyte composition containing a solid electrolyte material and a binder.

Abstract: The solid-state secondary battery of this invention including an electrode laminate and an outer case to house the electrode laminate, wherein the electrode laminate has a positive electrode layer, a negative electrode layer and a solid electrolyte layer placed between the positive electrode layer and the negative electrode layer, the positive electrode layer has a positive current collector and a positive active material layer, and the circumferences of the positive active material layer and the solid electrolyte layer are surrounded by an insulating frame having a volume resistivity at 20° C. of 1×1012 ?·cm or more and a porosity of 40% or less.

Abstract: A solid-state secondary battery according to the present invention includes an electrode laminate, and an exterior body accommodating the electrode laminate. The electrode laminate has a positive electrode layer, a negative electrode layer, and a solid electrolyte layer placed between the positive electrode layer and the negative electrode layer. The positive electrode layer includes a positive electrode current collector and a positive electrode active material layer. The solid electrolyte layer has a positive electrode-facing region that faces the positive electrode active material layer, and a positive electrode-non-facing region that does not face the positive electrode layer. The positive electrode-non-facing region has a porosity of lower than 5%.

Abstract: A solid-state secondary battery of this invention includes: an electrode multilayer; and an exterior case that houses the electrode multilayer, the electrode multilayer includes a positive electrode layer, a negative electrode layer, a solid electrolyte layer arranged between the positive electrode layer and the negative electrode layer and an intermediate layer provided between the negative electrode layer and the solid electrolyte layer, the positive electrode layer includes a positive electrode current collector and a positive electrode active material layer and when the area of the positive electrode active material layer in plan view is Sp, the area of the solid electrolyte layer in plan view is Ss, the area of the intermediate layer in plan view is Sm and the area of the negative electrode layer in plan view is Sn, a relationship of Sp<Sn?Sm?Ss is satisfied.

Abstract: Provided is an apparatus for manufacturing an all-solid-state battery with high efficiency. An apparatus for manufacturing an all-solid-state battery includes: a conductor conveyor configured to convey a conductor adapted to function as an electrode that is an element of the all-solid-state battery; an insulator conveyor configured to convey an insulator adapted to function as an insulating member that is an element of the all-solid-state battery; a cutter configured to form, in the insulator, a cut in correspondence with the shape of the insulating member; and a laminator-pressurizer configured to laminate and pressurize the conductor conveyed by the conductor conveyor and the insulator having the cut formed by the cutter.

Abstract: A solid-state battery includes: a positive electrode 10, a negative electrode 20, and a solid electrolyte layer 30 disposed between the positive and negative electrodes 10, 20 and which includes a solid electrolyte sheet 31 containing a porous base material 33 filled with a solid electrolyte material, and a binder 40, wherein the solid electrolyte layer 30 includes a positive electrode-side region 34 including a region distanced from a contact surface with the positive electrode 10, a negative electrode-side region 35 including a region distanced from a contact surface with the negative electrode 20, and an intermediate region 36 between the regions 34 and 35, a higher percentage of the base material 33 is disposed in the intermediate region 36 than in the regions 34, 35, and content of the binder in the intermediate region 36 is higher than that in at least one selected from the regions 34, 35.

Abstract: A manufacturing tool for a solid electrolyte sheet is a manufacturing tool for a solid electrolyte sheet configured such that a porous base is filled with a solid electrolyte material. The manufacturing tool includes a first frame member and a second frame member each having opposing sandwiching portions and sandwiching the base by the sandwiching portions. The sandwiching portions provide a fixing structure configured of provide tension to the sandwiched base.

Abstract: A lamination device is disposed downstream of a conveying device configured to convey a plurality of electrode bodies, and laminates the plurality of electrode bodies. The lamination device includes: a mounting plate on which the plurality of electrode bodies are laminated, the mounting plate being inclined with respect to the electrode bodies being conveyed by the conveying device; a first wall erected on the mounting plate and perpendicular to a conveying direction; and a drop prevention portion provided on the first wall or on a wall different from the first wall, the drop prevention portion preventing the plurality of electrode bodies from dropping from the mounting plate.

Abstract: To provide a solid electrolyte sheet with high strength that allows for a thinner sheet, and a solid-state battery provided with such a solid electrolyte sheet. A solid electrolyte sheet 31 is provided with a porous base material 33, a solid electrolyte material filling voids in the base material 33, and a binder adhering to the base material 33, wherein when 100% by mass is taken to mean an entirety of the solid electrolyte sheet 31, content of the binder is equal to or higher than 10% by mass. A solid-state battery 1 is provided with a positive electrode layer 11, a negative electrode layer 21, and a solid electrolyte layer 30 located between the positive electrode layer 11 and the negative electrode layer 21, wherein the solid electrolyte layer includes the solid electrolyte sheet 31.

Abstract: To provide a battery cell capable of suppressing deposition of dendrites and improving cycle characteristics. A battery cell having a negative electrode layer, an electrolyte layer, and a positive electrode layer, the negative electrode layer comprising a negative electrode active material layer that has at least one recess portion and at least one planar portion on a surface of the negative electrode active material layer, the surface being adjacent to the electrolyte layer, the recess portion being a cone or pyramid-shaped recess portion having a slant portion. The negative electrode active material layer comprises lithium metal, and the electrolyte layer is preferably a solid electrolyte layer comprising a solid electrolyte. When the at least one recess portion and the at least one planar portion comprise a plurality of recess portions and a plurality of planar portions, respectively, each of the planar portions is formed between the plurality of recess portions.

Abstract: An edge of a pressing target is suppressed from cracking. A roll press apparatus 100 has a roller 30 that presses a pressing target M. The roller 30 includes a first roller part 31 that presses the pressing target M in a radial direction of the roller 30 and a second roller part 32 that protrudes further than the first roller part 31 in the radial direction on each side of the first roller part 31 in an axial direction of the roller 30 to make contact with the pressing target M in the axial direction. Each of the second roller parts 32 has an elastic member E2 at least in a portion in contact with the pressing target M.

Abstract: A winding section of a filament winding apparatus winds a fiber bundle around a filament-wound member. A tension acquisition part acquires a detected winding-tension value. A supply-speed acquisition part acquires a detected supply-speed value. A storage part stores correlation information in which an allowable determination range of winding tension is set in relation to the supply speed. A determination part determines whether the winding of the fiber bundle is successful or unsuccessful by comparing detected-value information, including the detected winding-tension value and the detected supply-speed value associated with each other, with the correlation information.

Abstract: The present invention provides a battery cell capable of uniformly holding an electrode laminate and speeding up a manufacturing process. A battery cell includes an electrode laminate including positive and negative electrodes and an electrolyte layer, in which the positive and negative electrodes are alternately laminated with the electrolyte layer interposed between them; and a tube-shaped insulating member that is heat-shrinkable and holds the electrode laminate, wherein the insulating material has at least two folded parts for positioning a member disposed in the internal space of the insulating member. The insulating member preferably has two portions each between the two folded parts, and the two portions are preferably equal in circumferential length.

Abstract: A battery cell capable of: holding an electrode laminate uniformly and improving lamination dislocation as well as the durability of an electrode is provided. A battery cell includes an electrode laminate in which a positive electrode and a negative electrode are alternately laminated via an electrolyte layer. The battery cell includes a tube-shaped insulating member that holds the electrode laminate, and the insulating member is heat-shrinkable mainly in a direction parallel to the lamination direction of the electrode laminate. The insulating member preferably has a heat shrinkage percentage of to ?5% to 5% in a direction in which the current collector tab of the electrode laminate extends.

Abstract: A filament winding apparatus winds, around a workpiece, a fiber bundle formed by bundling a plurality of fibers. The filament winding apparatus includes a widening roller that rotates while making contact with the fiber bundle that is being conveyed. The widening roller has, provided on the peripheral surface, a plurality of projecting ridges extending in the axial direction, the projecting ridges being arranged side by side in the circumferential direction. The projecting ridges make contact with the fiber bundle to thereby widen the fiber bundle.

Abstract: A mandrel structure for use in manufacturing a fiber reinforced resin vessel by a filament winding process, includes: a shaft having a pair of axial ends configured to be supported by a drive unit; a mandrel having the shaft passed therethrough; and a pair of fittings having the shaft passed therethrough and projecting axially from respective axial ends of the mandrel. The mandrel is formed as a hollow shell made of a water-soluble material, and includes a pair of shaft holes receiving the shaft therein, and a receiving recess formed in a part of the mandrel surrounding each shaft hole and configured to engage the corresponding fitting in a rotationally fast manner.

Abstract: A mandrel for manufacturing a fiber reinforced resin vessel by a filament winding process includes: a tubular part; and a pair of end parts joined to respective axial ends of the tubular part. The tubular part and the end parts are each made of a molded product of a material including pulp and a starch-based binder.