A power storage device includes an electrode group, a case having an opening, and a sealing body. The sealing body includes an annular sealing plate, a terminal cap, and an insulating gasket. The sealing plate includes a first wall portion with a tubular shape and a flange portion extending from one end of the first wall portion outward in a radial direction of the first wall portion. The terminal cap includes a cover portion with a plate shape and a crimp portion connected with a periphery of the cover portion. The cover portion closes an opening of the first wall portion surrounded by another end of the first wall portion. The gasket includes a second wall portion with a tubular shape facing an outer peripheral surface of the first wall portion and an annular base disposed between the cover portion and the another end of the first wall portion. The crimp portion includes a third wall portion with a tubular shape surrounding at least a part of the second wall portion. The third wall portion compress the second wall portion. A peripheral portion of the sealing plate is joined to an opening end portion of the case.

An electricity storage module according to the present invention is provided with: a plurality of arranged cylindrical electricity storage devices; and an upper holder which holds the upper end parts of the plurality of electricity storage devices, while being provided with a plurality of containing parts that is formed of a thermoplastic resin. The upper holder comprises an upper support member which is formed of a thermosetting resin and supports electricity storage devices adjacent to each other, while being positioned between the adjacent electricity storage devices. In comparison to the thermoplastic resin, the thermosetting resin is not susceptible to deformation or melting event if heat is applied thereto.

A terminal-coating resin film according to one aspect of the present disclosure is so disposed in a power storage device including a power storage device body and a terminal electrically connected to the power storage device body as to cover an outer peripheral surface of part of the terminal. The terminal-coating resin film has a single-layer structure or a multilayer structure and includes a resin layer having at least one secondary dispersion peak γ within a range of −130° C. to −50° C. in a profile of a loss tangent tan δ obtained by dynamic viscoelastic measurement under a condition of 1.0 Hz. The terminal-coating film is comprised of a resin composition including a first resin including polyolefin and a second resin including at least one resin selected from polyester, polyamide, polycarbonate, and polyphenylene ether.

A capacitor may be configured with a dielectric laminate disposed on ordered or non-ordered structures. Materials for the dielectric laminate have high dielectric constant and reduce leakage current to increase breakdown voltage of the device. These materials may include titanium dioxide (TiO.sub.2) and silicon dioxide (SiO.sub.2). In one implementation, the capacitor may reside on a substrate. The capacitor may have structure (e.g., nano-tubes, nano-holes, etc;) disposed on the substrate having a surface area greater than the surface area of the substrate and a laminate conformally coating the structure, the laminate comprising a first layer and a second layer with materials that configure the capacitor with an energy density of at least 60 Wh/Kg.

In the embodiment, an energy storage apparatus includes: an energy storage device including a metal external terminal; and a metal bus bar that is laminated on the external terminal and welded to the external terminal. A welded portion that welds the bus bar and the external terminal is formed on the bus bar, the welded portion is extended from the bus bar to the external terminal, the external terminal includes a clad material including a first metal layer adjacent to the bus bar and a second metal layer adjacent to the first metal layer, the welded portion welds the bus bar and the first metal layer, and an end of the welded portion does not reach an interface between the first metal layer and the second metal layer.

A power semiconductor module has a substrate, with power semiconductor components, and a DC voltage connecting device, which has a first and a second flat conductor connecting element and at least one first metal layer connecting element and at least one second metal layer connecting element, wherein the second flat conductor connecting element is arranged spaced apart in the normal direction of the first flat conductor connecting element from the first flat conductor connecting element, the first flat conductor connecting element is electrically connected by the first metal layer connecting element and the second flat conductor connecting element is electrically connected by the second metal layer connecting element to the metal layer, the first flat conductor connecting element has a flat conductor end section and a flat conductor connection section arranged between the one first metal layer connecting element and the flat conductor end section.

A capacitive coupler provides high coupling capacitance through the use of an electrical double layer formed on opposite plates of the coupler. The coupler can be independent or provide a hydrodynamic or hydrostatic bearing as well as capacitive coupling and the circulated dielectric can provide for cooling of associated machinery.

A subsurface battery comprises an anodic fracture disposed within a subsurface stratum and a cathodic fracture disposed with the subsurface stratum. A first well electrode contacts the anodic fracture and a second well electrode contacts the cathodic fracture.

A method for manufacturing an energy storage device according to one aspect of the present invention includes: housing, in a case, an electrode assembly in which a negative electrode and a positive electrode are stacked; housing an electrolyte solution in the case; housing a gas, soluble in the electrolyte solution, in the case after the electrolyte solution is housed in the case; and sealing the case in a state where the gas soluble in the electrolyte solution is housed in the case.

An electrical storage module includes an insulating substrate that opposes an electrical storage group including a plurality of electrical storage devices and includes a plurality of through-holes, a plurality of current collecting foils that are arranged side by side at intervals from each other on a first surface of the insulating substrate on a side opposite to a surface that opposes the electrical storage group, and an insulating sheet that is disposed to cover the plurality of current collecting foils. The plurality of current collecting foils include a first current collecting foil and a second current collecting foil that are adjacent to each other at an interval in a direction parallel to the first surface. The first current collecting foil includes a first lead part in a tongue shape that extends from an edge, is inserted into a hole of the insulating substrate, and is electrically connected to a positive electrode of a battery, and the second current collecting foil includes a second lead part in a tongue shape that extends from the edge, is inserted into the hole of the insulating substrate, and is electrically connected to a negative electrode of the battery.