An electrical storage system is provided that has a thickness of less than 2 mm, where the system includes at least one sheet-type discrete element, the sheet-type discrete element exhibiting high resistance to an attack of alkali metals or alkali metal ions, in particular lithium, wherein the sheet-type discrete element has a low content of TiO.sub.2, the TiO.sub.2 content preferably being less than 2 wt %, preferably less than 0.5 wt %, and preferably free of TiO.sub.2.

An all solid battery includes a multilayer chip in which plurality of internal electrodes are alternately exposed to two side faces. A thickness SE of a solid electrolyte layer is 1 μm or more and 50 μm or less in an intersection portion in which two internal electrodes next to each other connected to different external electrodes intersect with each other. Thicknesses EL1 and EL2 of the two internal electrodes are 1 μm or more and 200 μm or less. In one of two non-intersection portions, a length EM from one of the pair of external electrodes contacting the one of the two non-intersection portions to an internal electrode spaced from the one of the pair of external electrodes in a distance direction is 50 μm or more and 800 μm or less. EM/(SE+EL1/4+EL2/4) is 20 or less.

Provided is a light-transmissive battery that transmits visible light. A light-transmissive battery includes a positive electrode including an insulating transparent cover body and a positive-electrode current collector layer and a positive electrode layer sequentially stacked over the insulating transparent cover body; a negative electrode including an insulating transparent cover body and a negative-electrode current collector layer and a negative electrode layer sequentially stacked over the insulating transparent cover body; and a transparent electrolyte disposed between the positive electrode layer and the negative electrode layer that are opposed to each other. Each of the positive-electrode current collector layer, the negative-electrode current collector layer, the positive electrode layer, and negative electrode layer is formed to a thickness that allows the layer to transmit visible light.

The present invention relates to a flexible lithium battery comprising a first current collector layer and a second current collector layer, wherein the first current collector layer has a first outer surface and a first inner surface, and the second current collector layer has a second outer surface and a second inner surface; there is a glue frame sandwiched between the first inner surface and the second inner surface to form a sealed and enclosed space, wherein there is an electrochemical system layer disposed in this sealed and enclosed space, with the electrochemical system layer comprising a first active material layer, a second active material layer, and an electrically insulating layer disposed between the first active material layer and the second active material layer; and there is a flexible adhesive layer disposed between the first inner surface and the first active material layer and/or between the second inner surface and the second active material layer, wherein this flexible adhesive layer consists of an adhesive and an electrically conductive additive, with the adhesive consisting of a linearly structured colloid and a stereoscopically structured colloid.

An energy storage device includes a substrate having a portion that is optically transparent in a predefined range of wavelengths, and at least one electrochemical energy storage system comprising, as from a face of the transparent portion, a stack having successively a first current collector, a first electrode, an electrolyte, a second electrode and a second current collector, the stack being covered partially by a cover characterised in that wherein at least one part of the cover has a coefficient of light absorbance greater than or equal to 80%, and preferably greater than 90%.

A wiring conductor includes a first electrode located on a bottom surface of a recessed portion, a second electrode located on a first surface between a frame portion and the recessed portion, a first external electrode located on a second surface, and a second external electrode located on the second surface and electrically connected to the second electrode. A conductive sheet is electrically connected to the second electrode and extends over an opening of the recessed portion above the first surface.

A wiring conductor includes a first electrode located on a bottom surface of a recessed portion, a second electrode located on a first surface between a frame portion and the recessed portion, a first external electrode located on a second surface, and a second external electrode located on the second surface and electrically connected to the second electrode. A conductive sheet is electrically connected to the second electrode and extends over an opening of the recessed portion above the first surface.

A solid state battery that includes: a solid state battery laminate including at least one battery constituent unit, the at least one battery constituent unit including a positive electrode layer, a negative electrode layer, and a solid electrolyte layer interposed between the positive electrode layer and the negative electrode layer; a first external terminal on a first side surface of the solid state battery laminate; a second external terminal on a second side surface of the solid state battery laminate, the second side surface facing the first side surface across the solid state battery laminate; and an exterior member covering the solid state battery laminate, the exterior member including one or more pores on an inner side of the exterior member adjacent to the solid state battery laminate.

The nonaqueous electrolyte secondary battery herein disclosed includes a nonaqueous electrolyte, a wound electrode assembly, and a battery case accommodating them. The wound electrode assembly includes a pair of flat surface parts and a pair of R parts. In a state where 4.5 kN restriction pressure is added from a thickness direction so as to restrict the wound electrode assembly, when a total of outermost circumferential lengths of the pair of R parts of the wound electrode assembly on a cross section orthogonal to the winding axis of the wound electrode assembly is treated as a (mm), an outermost circumferential length of the cross section is treated as b (mm), a width of the positive electrode active material layer is treated as c (mm), and a height of the wound electrode assembly of the cross section is treated as d (mm), both 0.282<a/b and c/d<1.91 are satisfied.

The nonaqueous electrolyte secondary battery herein disclosed includes a nonaqueous electrolyte, a wound electrode assembly, and a battery case accommodating them. The wound electrode assembly includes a pair of flat surface parts and a pair of R parts. In a state where 4.5 kN restriction pressure is added from a thickness direction so as to restrict the wound electrode assembly, when a total of outermost circumferential lengths of the pair of R parts of the wound electrode assembly on a cross section orthogonal to the winding axis of the wound electrode assembly is treated as a (mm), an outermost circumferential length of the cross section is treated as b (mm), a width of the positive electrode active material layer is treated as c (mm), and a height of the wound electrode assembly of the cross section is treated as d (mm), both 0.282<a/b and c/d<1.91 are satisfied.