Abstract: The present disclosure relates to a solid electrolyte composition that can achieve compatibility between energy density and strength of a solid-state battery. Provided is a solid electrolyte composite disposed between a positive electrode layer and a negative electrode layer in a solid-state battery, comprising a positive electrode side solid electrolyte layer disposed in a side closer to the positive electrode layer and a negative electrode side solid electrolyte layer disposed in a side closer to the negative electrode layer, the solid electrolyte composite having a stepped shape having a step between the positive electrode side solid electrolyte layer and the negative electrode side solid electrolyte layer, at least the negative electrode side solid electrolyte layer comprising a filler and/or a porous substrate, the negative electrode side solid electrolyte layer having a higher content of the filler and/or the porous substrate than the positive electrode side solid electrolyte layer.

Abstract: Disclosed is an all-solid-state battery including: a positive electrode for an all-solid-state battery; a negative electrode for an all-solid-state battery; and a solid-state electrolyte layer that is disposed between the positive electrode and the negative electrode, wherein the positive electrode includes a positive electrode current collector, a positive electrode active material layer formed on the positive electrode current collector, and an insulating member provided on an outer periphery of the positive electrode active material layer, wherein the positive electrode active material layer has a first inclined portion that is inclined such that the positive electrode active material layer widens away from the positive electrode current collector, and wherein the negative electrode active material layer contains metallic lithium or a lithium alloy.

Abstract: The battery module includes a plurality of battery cells, each battery cell being provided with an electrode stack accommodated in an exterior body and a tab lead that is connected to the electrode stack and extends from the exterior body, the battery module having a pair of end plates that retain the battery cells, the end plates being disposed at both ends of the electrode stacks in an electrode stacking direction, the tab lead being electrically connected to the tab lead of another of the battery cells that is adjacent, and the tab lead having a first extension that extends in a direction orthogonal to the electrode stacking direction and a second extension that extends in a direction in which the another of the battery cells is adjacent.

Abstract: To secure ionic conductivity by improving the adhesion between an electrode material mixture and a solid electrolyte and suppressing electrodeposition of lithium. A lithium ion secondary battery (100) includes a positive electrode including an electrode material mixture that fills pores of a metal porous body constituting an electrode current collector, a first solid electrolyte layer including a solid electrolyte that fills pores of a resin porous body, and a negative electrode including an electrode material mixture that fills pores of a metal porous body constituting an electrode current collector. The positive electrode and the negative electrode are alternately stacked with the first solid electrolyte layer provided therebetween.

Abstract: To provide a solid-state battery comprising an electrode laminate comprising a negative electrode current collector, a lithium metal layer, a solid electrolyte layer, a positive electrode material mixture layer, and a positive electrode current collector sequentially laminated, wherein one surface of the solid electrolyte layer faces the lithium metal layer, and an other surface faces the positive electrode material mixture layer; a resin or resin composition is disposed on outer periphery portions of the negative electrode current collector, the lithium metal layer, and the solid electrolyte layer of the electrode laminate; and a space formed between the lithium metal layer and the solid electrolyte layer formed by chemical conversion of the electrode laminate is filled with the resin or resin composition.

Abstract: To provide a solid-state battery module and a separator which can apply sufficient surface pressure to a solid-state battery cell and are excellent in durability and vibration resistance. A separator (120) disposed between adjacent solid-state battery cells (101) in a solid-state battery module (100) including a plurality of solid-state battery cells (101) to electrically insulate the adjacent solid-state battery cells (101) of the plurality of solid-state battery cells (101), from each other. The separator (120) includes elastically deformable elastic members (123a, 123b) which apply biasing force in the stacking directions of the plurality of solid-state battery cells (101). Durability and vibration resistance can be obtained by adequately fixing the solid-state battery cells (101) with the elastic members (123a, 123b).

Abstract: To provide a fast charger and a fast charging method that are highly efficient in fast charging of a solid-state battery. A fast charger includes a charging section, a temperature acquisition section, and a controller. The charging section feeds current to a solid-state battery being a secondary battery. The temperature acquisition section acquires a temperature of the solid-state battery. The controller performs control to cool the solid-state battery if the temperature acquired by the temperature acquisition section is greater than or equal to a predetermined temperature. The controller determines a plurality of inflection points on a curve representing changes in the temperature of the solid-state battery against internal resistance of the solid-state battery. The predetermined temperature corresponds to an inflection point on a high-temperature side among the plurality of inflection points.

Abstract: A minute short circuit detection device that detects whether a minute short circuit has occurred in a battery unit including a positive electrode layer, an electrolyte layer, and a negative electrode layer includes: a voltage detecting unit configured to detect a voltage of the battery unit; a current detecting unit configured to detect a current flowing in the battery unit; a storage device configured to store a program; and a hardware processor. The hardware processor is configured to execute the program stored in the storage device to determine whether a minute short circuit has occurred in the battery unit on the basis of a detection result of the voltage or the current. The hardware processor determines whether the minute short circuit has occurred on the basis of the detection result of the current and a sign of a voltage applied to the battery unit in a dormant state.

Abstract: A battery module is provided with: battery cells comprising all-solid-state batteries having a positive electrode layer, a negative electrode layer, and a solid electrolyte layer; a support plate on which the battery cells are mounted; and a cooling medium channel through which a cooling medium for cooling the support plate flows, wherein electrode terminals are provided so as to project from one surface of the battery cells, bus bars capable of electrically connecting to the electrode terminals are provided on a battery cell mounting surface, the bus bars are in thermal contact with the support plate, and the battery cells are mounted on the support plate by causing one surface of the battery cells to face the cell mounting surface and electrically connecting the electrode terminals to the bus bars.

Abstract: To improve the adhesion between an electrode material mixture and a solid electrolyte, and thereby suppress electrodeposition of lithium. This electrode includes a planar electrode current collector including a metal porous body, an electrode material mixture layer that fills pores of the metal porous body, and a solid electrolyte layer that fills pores of the metal porous body. The electrode material mixture layer is formed on one side of the electrode current collector, and the solid electrolyte layer is formed on the other side of the electrode current collector. The electrode material mixture layer and the solid electrolyte layer are stacked in a planar shape in the pores of the metal porous body.

Abstract: Provided is a solid-state battery including: an electrode laminate in which a negative electrode mixture layer, a solid electrolyte layer, and a positive electrode mixture layer are sequentially laminated over a negative electrode current collector; a positive electrode current collector; an insulating frame provided along an outer periphery of the positive electrode mixture layer and an outer periphery of the positive electrode current collector; and a positive electrode tab. In a cross section parallel to a laminating direction of the electrode laminate and perpendicular to a direction in which the positive electrode tab extends, the solid electrolyte layer has a first region disposed inside the insulating frame and a second region disposed outside the insulating frame, and when the solid-state battery is viewed from above, an outer peripheral edge of the second region is located outside an outer peripheral edge of the first region.

Abstract: Provided is a solid-state battery including: an electrode laminate in which a first electrode mixture layer, a solid electrolyte layer, a second electrode mixture layer, and a second fixing member are sequentially laminated over a first fixing member; a first guide member disposed along an outer periphery of the first electrode mixture layer; and a second guide member disposed along an outer periphery of the second electrode mixture layer. The first guide member is bonded to the solid electrolyte layer and/or the first fixing member, and the second guide member is bonded to the solid electrolyte layer and/or the second fixing member.

Abstract: Provided are: a solid-state battery in which an initial load is applied to a battery cell; and a solid-state battery module comprised of the battery. This solid-state battery includes a pressing portion provided on a solid-state battery case so that a spring force is utilized to apply the initial load to the solid-state battery. Specifically, the solid-state battery includes a solid-state battery cell, and a battery case for accommodating the solid-state battery cell, in which the solid-state battery cell is a stack including a positive electrode, a negative electrode, and a solid electrolyte present between the positive electrode and the negative electrode, and in which a face constituting the battery case and extending substantially perpendicular to the stacking direction of the stack has a pressing portion.

Abstract: A solid-state batter is provided which includes an electrode stack in which a solid electrolyte layer and positive electrode composite layer are sequentially laminated on a lithium metal layer, in which, when viewing the electrode stack from a top surface, an outer circumferential end of the lithium metal layer exists more to an inner side than an outer circumferential end of the solid electrolyte layer, and an insulation member extending from the solid electrolyte layer towards the lithium metal layer is disposed in a region between the outer circumferential end of the lithium metal layer and the outer circumferential end of the solid electrolyte layer.

Abstract: To provide a laminate type solid-state battery capable of preferably accommodating an electrode laminate. A laminate type solid-state battery comprising: an electrode laminate; and a casing body being formed of a laminate film and accommodating the electrode laminate, the casing body comprising an insulating member in an interior thereof, the insulating member abutting at least one of laminate end surfaces of the electrode laminate, the insulating member having an inclined surface that outwardly inclines from the electrode laminate in a cross-sectional view along the laminate direction, the inclined surface and the laminate surface of the electrode laminate forming an angle greater than 90° and less than 180°.

Abstract: Provided is a lithium metal secondary battery having a negative electrode layer, a solid electrolyte layer, and an intermediate layer therebetween, which can suppress the deposition of lithium metal on outer peripheral surface(s) of the intermediate layer along the stacking direction. The lithium metal secondary battery has a negative electrode layer including a lithium metal layer, an intermediate layer, a solid electrolyte layer, and a positive electrode layer stacked in this order, in which at least one of outer peripheral surfaces of the intermediate layer along the stacking direction abuts against and is covered with a protective layer, and the protective layer has ionic conductivity and no electron conductivity.

Abstract: Provided is a battery module having a high energy density and exhibiting suppressed electrode displacement or peeling during vibration. In the present invention, a residual space in a battery cell, which is necessary for the lithium ion secondary batteries employing the liquid electrolyte is eliminated, and additionally a module component is disposed in a portion that would provide the residual space.

Abstract: A pouch cell includes: a charging and discharging element; a current collecting tab lead configured to be thinner than the charging and discharging element and drawn out of the charging and discharging element to an outside; an exterior film configured to wrap the charging and discharging element in a state in which the current collecting tab lead is drawn out to an outside; a clamping part configured to clamp the current collecting tab lead from the exterior film by front and back surfaces in a thickness direction; and an airtightness maintaining member mounted to cover an end portion of the clamping part, wherein the airtightness maintaining member is separated from the exterior film, has a slit through which the current collecting tab lead is drawn out to the outside and has a bent part which covers an end portion of the clamping part, and a dimension of the bent part in the thickness direction of the clamping part is larger than a width dimension of the slit.

Abstract: To provide a solid-state battery capable of achieving high capacity. A solid-state battery including a multilayer body including a stack of a plurality of electrode layers including positive electrode layers and negative electrode layers and solid electrolyte layers each disposed between the electrode layers, the multilayer body having a columnar shape; and the solid-state battery including a positive electrode terminal and a negative electrode terminal disposed at both end portions of the multilayer body; a positive electrode tab electrically connected to the positive electrode layer and the positive electrode terminal; and a negative electrode tab electrically connected to the negative electrode layer and the negative electrode terminal, wherein the positive electrode tab and the negative electrode tab are spirally wound on an outer peripheral surface of the multilayer body.

Abstract: To provide a solid-state battery in which the capacity and voltage can be optionally adjusted in a single battery and the installation space for the battery can be reduced. A solid-state battery includes a plurality of electrode layers, and a solid electrolyte layer disposed between the electrode layers. The electrode layers includes positive electrode portion formed by filling a current collector including a metal porous body with a positive electrode material mixture, negative electrode portion formed by filling a current collector including a metal porous body with a negative electrode material mixture, and an isolation portion formed between the positive electrode portion and the negative electrode portion. Between the plurality of electrode layers disposed adjacent to each other, the positive electrode portion and the negative electrode portion are disposed so as to face each other, and the isolation portions are disposed so as to face each other.