Stacked-cell battery

A stacked-cell battery in which a plurality of unit cells are stacked, the unit cell each comprising a negative electrode collector layer, a negative electrode active material layer, a solid electrolyte layer or a separator, a positive electrode active material layer, and a positive electrode collector layer, stacked in that order, the stacked-cell battery having a stacking direction in which the unit cells are stacked, an in-plane direction perpendicular to the stacking direction, a lengthwise direction and a widthwise direction perpendicular to the lengthwise direction in the in-plane direction,

• wherein the stacked-cell battery, as viewed from the stacking direction, has:
• 1) a cell region each comprising the negative electrode collector layer, the negative electrode active material layer, the solid electrolyte layer or the separator, the positive electrode active material layer, and the positive electrode collector layer, and
• 2) a collection region adjacent in the lengthwise direction of the cell region, each comprising an extension of the negative electrode collector layer, an extension of the solid electrolyte layer or an extension of the separator or an insulating sheet, an extension of the positive electrode collector layer, a negative electrode collecting section, and a positive electrode collecting section,
• wherein the respective collection-region-side-ends of the extensions of the negative electrode collector layers and the extensions of the positive electrode collector layers have shapes that do not include recesses or raised sections, as viewed from the stacking direction,
• wherein the negative electrode collecting sections and the positive electrode collecting sections are at the ends of the collection region on the side opposite the cell region, and mutually separated in the widthwise direction by a spacing between them, as seen from the stacking direction,
• wherein the negative electrode collecting sections are connected to each of the extensions of the negative electrode collector layers of the plurality of unit cells to electrically connect the extensions of the negative electrode collector layers of the plurality of unit cells together, but are not connected to the extensions of the positive electrode collector layers,
• wherein the positive electrode collecting sections are connected to each of the extensions of the positive electrode collector layers of the plurality of unit cells to electrically connect the extensions of the positive electrode collector layers of the plurality of unit cells together, but are not connected to the extensions of the negative electrode collector layers, and
• wherein at the collecting sections, the extensions of the solid electrolyte layers or the extensions of the separators or the insulating sheets lie all interspaces between the negative electrode collector layers and positive electrode collector layers of the stacked-cell battery.