Abstract: A battery of the present disclosure includes: a first battery element; a second battery element laminated on the first battery element and electrically coupled with the first battery element in parallel; and a first lead terminal electrically coupled with the first battery element and the second battery element, in which the first lead terminal has a non-contact portion that is not in contact with any of the first battery element and the second battery element, and the non-contact portion has a first embossed shape at least on a part of a surface.

Abstract: A battery of the present disclosure includes: a first electrode; a second electrode; a solid electrolyte layer disposed between the first electrode and the second electrode; a temperature sensor; and a first lead-out terminal, in which the temperature sensor includes at least one selected from the group consisting of a thermistor and a resistance temperature detector, and is in contact with the first electrode, and the first lead-out terminal is in contact with the temperature sensor.

Abstract: A battery includes: an electrode layer; a counter electrode layer, which is a counter electrode for the electrode layer; a solid electrolyte layer between the electrode layer and the counter electrode layer; and an electrode current collector electrically coupled to the electrode layer. The solid electrolyte layer includes a first region containing a first solid electrolyte material and a second region containing a second solid electrolyte material. The first region is positioned within a region where the electrode layer and the counter electrode layer face each other. Moreover, a second density, which is of the second solid electrolyte material in the second region, is higher than a first density, which is of the first solid electrolyte material in the first region.

Abstract: A battery of the disclosure includes a first cell and a second cell disposed on the first cell. The first cell includes a first positive electrode layer, a first negative electrode layer, and a first solid electrolyte layer disposed between the first positive electrode layer and the first negative electrode layer. The first cell has an outer peripheral shape that includes a first side having a curved portion in plan view. The outer peripheral shape of the first cell includes a portion on the first side that does not coincide with an outer peripheral shape of the second cell in plan view.

Abstract: A battery of the present disclosure includes a first electrode layer, a first solid electrolyte layer, and a second electrode layer in this order. The first electrode layer includes: a first active material layer; a second active material layer positioned between the first active material layer and the first solid electrolyte layer, the second active material layer having the same polarity as the first active material layer has; and a second solid electrolyte layer positioned between the first active material layer and the second active material layer. The second solid electrolyte layer is continuous with the first solid electrolyte layer. A stacked battery of the present disclosure includes a plurality of the batteries, and the plurality of batteries are stacked so as to be electrically connected in series or in parallel.

Abstract: A battery includes: a power generation element including battery cells which are electrically connected in parallel and stacked, and each of which includes an electrode layer, a counter-electrode layer, and a solid electrolyte layer located between the electrode layer and the counter-electrode layer; an electrode insulating layer covering an electrode layer among the electrode layers at a side surface of the power generation element; and a counter-electrode terminal covering the side surface and the electrode insulating layer, and electrically connected to a counter-electrode layer among the counter-electrode layers.

Abstract: A battery includes: a power generation element including battery cells each of which includes an electrode layer, a counter-electrode layer, and a solid electrolyte layer located between the electrode layer and the counter-electrode layer, and which are electrically connected in parallel and stacked; an insulating member covering an electrode layer at a side surface of the power generation element; and a terminal electrode covering the side surface and the insulating member, and electrically connected to a counter-electrode layer, in which the power generation element includes: a first parallel unit that includes first battery cells and has both ends in a stacking direction at each of which a counter-electrode layer is located; and a second parallel unit that includes second battery cells, has both ends in the stacking direction at each of which an electrode layers is located, and is stacked on the first parallel unit.

Abstract: A battery includes: a power generation element including a plurality of battery cells each of which includes an electrode layer, a counter-electrode layer, and a solid electrolyte layer located between the electrode layer and the counter-electrode layer, the plurality of battery cells being electrically connected in parallel and stacked; an interlayer located between a pair of two adjacent battery cells; an electrode insulating layer covering an electrode layer among the electrode layers at a first side surface of the power generation element; and a counter-electrode terminal covering the first side surface and the electrode insulating layer, and electrically connected to a counter-electrode layer among the counter-electrode layers.

Abstract: A battery according to a first embodiment includes: a battery element including a first electrode, a solid electrolyte layer, and a second electrode; a first terminal containing a first conductive material; and a second terminal containing a second conductive material. The first terminal is in contact with the first electrode. The second terminal covers at least part of a surface of the first terminal to be electrically connected to the first terminal and directly covers at least part of a corner of the battery element.

Abstract: A solid electrolyte of the present disclosure contains Li, M, and X, and, in the solid electrolyte, the coefficient of variation of the M content is 10 or less, and the coefficient of variation of the X content is 15 or less. A method for producing a solid electrolyte according to the present disclosure includes (A) synthesizing a halide containing Li, M, and X, (B) pulverizing the halide, and (C) heat-treating the halide, and the (A), the (B), and the (C) are performed in this order. Here, M is at least one selected from the group consisting of metalloids and metal elements other than Li, and X is at least one selected from the group consisting of F, Cl, Br, and I.

Abstract: A battery includes an electrode layer, a counter electrode layer, which is a counter electrode for the electrode layer, and a solid electrolyte layer between the electrode layer and the counter electrode layer. The solid electrolyte layer has a first region containing a first solid electrolyte material and a second region containing a second solid electrolyte material. The first region is positioned within a region where the electrode layer and the counter electrode layer face each other. The second region is positioned on an outer peripheral side of the region where the electrode layer and the counter electrode layer face each other, and is in contact with the first region. The first region includes a first projecting portion that projects outward from a region where the electrode layer and the counter electrode layer face each other, and the second region covers the first projecting portion.

Abstract: A battery includes: a power generation element that includes a plurality of unit cells each including a positive electrode layer, a negative electrode layer, and a solid electrolyte layer. The power generation element includes a first side surface and a second side surface, and in the first side surface, first depressions and first projections are arranged alternately, in the second side surface, second depressions and second projections are arranged alternately, each of the first depressions includes a first inclination surface, and each of the second depressions includes a second inclination surface. The battery further includes: a first insulating member arranged in the first depressions; a second insulating member arranged in the second depressions; a first conductive member; and a second conductive member. The positive electrode layers are electrically connected via the first conductive member, and the negative electrode layers are electrically connected via the second conductive member.

Abstract: The battery includes a power generation element including: a positive electrode active material layer containing a positive electrode active material and a first inorganic solid electrolyte; a negative electrode active material layer containing a negative electrode active material and a second inorganic solid electrolyte; and a solid electrolyte layer positioned between the positive electrode active material layer and the negative electrode active material layer and containing a third inorganic solid electrolyte. There are a plurality of voids inside the power generation element, and an internal pressure of the plurality of voids is lower than 1 atm.

Abstract: A battery of the present disclosure includes: a battery element, the battery element including a first electrode, a solid electrolyte layer, and a second electrode; an insulating member; a lead terminal; and a first solder material. The insulating member encloses the battery element and the first solder material. The lead terminal is electrically connected to the battery element. The first solder material is positioned between the insulating member and the lead terminal.

Abstract: A battery of the present disclosure includes: a battery element, the battery element including a first electrode, a solid electrolyte layer, and a second electrode; a first insulating member; a second insulating member; and a void. The battery element has a laminated structure in which the first electrode, the solid electrolyte layer, and the second electrode are disposed in this order. The first insulating member coats at least a portion of a side surface of the battery element, the second insulating member encloses the battery element, the first insulating member, and the void, and the void includes a void positioned close to the side surface of the battery element.

Abstract: A manufacturing method of the present disclosure includes (A) obtaining a battery by cutting a long laminate in a lamination direction, the laminate including a first active material layer, a solid electrolyte layer, and a second active material layer that are disposed in this order. The laminate has a first region and a second region that are repeated alternately in a lengthwise direction, where the first active material layer is present in the first region and is not present in the second region in plan view in the lamination direction. In the (A), the laminate is cut in the first region and the second region so that the battery has a desired capacity.

Abstract: The battery includes: a power generation element including a negative electrode active material layer, a positive electrode active material layer, and a solid electrolyte layer positioned between the negative electrode active material layer and the positive electrode active material layer; a sealing material that seals a first surface, which is a side surface of the power generation element; and a negative electrode current collector positioned on a side of the negative electrode active material layer in the power generation element. In the battery, a void surrounded by the sealing material, the first surface, and the negative electrode current collector is present, and the internal pressure of the void is lower than 1 atm. The negative electrode current collector includes a first recess curved to be recessed toward the void.

Abstract: A battery includes a power generation element that includes a plurality of unit cells each including a positive electrode layer, a negative electrode layer, and a solid electrolyte layer, the unit cells are stacked in a direction normal to a main surface, in a side surface of the power generation element, one electrode layer of the positive electrode layer and the negative electrode layer in each of the unit cells protrudes more than the other electrode layer such that depressions and projections are provided, each of the depressions includes a first inclination surface that is an end surface of the other electrode layer, and the battery further includes: one or more conductive members in contact with a corresponding one of the projections; an insulating member that covers the side surface; and one or more extraction electrodes that are in contact with the one or more conductive members.

Abstract: A battery includes: a power generation element; a first insulation film; an electrode terminal; and a counter electrode terminal. The power generation element includes an electrode main surface, a counter electrode main surface, and a side surface. The first insulation film includes a first side surface covering portion and a first main surface covering portion. The electrode terminal includes a second side surface covering portion that covers the first side surface covering portion and an electrode contact portion that is connected with the second side surface covering portion and is joined to the electrode main surface. The counter electrode terminal is joined to the counter electrode main surface. The electrode terminal further includes a second main surface covering portion that is connected with the second side surface covering portion and covers the first main surface covering portion.

Abstract: A battery that is an example of an electrical device according to the present disclosure includes: an electrical element having a current collector such as a battery element having a current collector; a lead terminal electrically connected to the current collector; a joining portion containing an electrically-conductive resin material and joining the current collector and the lead terminal to each other; and a heat-melting portion that is disposed between the joining portion and the lead terminal and that contains a solder material. The heat-melting portion may be in contact with the lead terminal. The joining portion may be in contact with the current collector and the heat-melting portion.