An electrical storage device includes a case having first and second opposed main walls which face one another and at least one side wall coupled the first and second main walls. The case having a generally rectangular shape with outer corners and includes a cutout part having inner corners. An integrated electrode body is located in the case and is joined to the first main wall. The integrated body includes a first electrode, a second electrode, and a separator disposed between the first and second electrodes. The electrode body has a bending strength which is higher than a bending strength of the first main wall. An electrolyte fills the case.

Disclosed is a battery cell, which includes: an electrode assembly; an electrode lead connected to the electrode assembly; a pouch case surrounding the electrode assembly and sealed in a state in which the electrode lead extends through the pouch case and is exposed at an outside surface of the pouch case; and a fire extinguishing unit disposed in the pouch case and configured to eject a fire extinguishing powder when a temperature of the first extinguishing unit is equal to or greater than a predetermined limit temperature.

A power storage device packaging material includes a structure including at least a substrate layer, an adhesive layer, a metal foil layer, a sealant adhesive layer, and a sealant layer, which are laminated in this order, wherein the adhesive layer has a yield stress in the range of 3500 to 6500 N/cm.sup.2 and breaking elongation of 45 to 200% in a stress-strain curve determined by a tensile test at a tension rate of 6 mm/min. A power storage device packaging material according to the second aspect of the present disclosure includes a structure including at least a substrate layer, an adhesive layer, a metal foil layer, an anticorrosion treatment layer, a sealant adhesive layer, and a sealant layer, which are laminated in this order, wherein the adhesive layer has a glass transition temperature in a range of 140° C. or more and 160° C. or less.

A battery housing is configured to encase multiple battery cells comprises a supercapacitor shell. The supercapacitor shell comprises two layers each of carbon fiber reinforced with plastic; an electrode between the two layers, the electrode comprising negative electrode material, positive electrode material, and an electrolyte; a positive electrode terminal connected to the carbon fiber of one of the two layers; and a negative electrode terminal connected to the carbon fiber of another of the two layers. Edges of the two layers are laminated together to contain the electrode with the positive electrode terminal and the negative electrode terminal extending external to the laminated edges.

A battery cell comprising a composite water-responsive safety layer and/or composite water- and pH-responsive safety layer to protect against tissue damage and/or electrolysis, when the battery cell is exposed to aqueous solution or tissue, is provided. The composite water-responsive safety layer and/or composite water- and pH-responsive safety layer is adapted to change from a non-electronically conducting state to an electronically conducting state.

A battery includes a casing that has an inner surface defining a chamber for an electrolyte, and a conductive lining being configured for electrical communication with a first battery terminal. There is also a permeable separator sheet disposed between the electrolyte and the conductive surface; a conductive rod having a first end configured for electrical communication with a second battery terminal, and, a second end configured for contacting the electrolyte. There is also an opening disposed in the casing; a sealing member configured for arrangement between at least a sealed position and an unsealed position to allow a potential difference to be produced between the first and second battery terminals. There is also at least one spacing element configured for spacing the electrolyte apart from the conductive lining within the chamber.

A metal seawater fuel cell includes a single cell or a battery pack which is composed of more than two single cells connected in series or in parallel or in series and parallel through circuits. The single cell has a metal anode arranged oppositely in a sealed single cell housing, a cathode carrying a hydrogen evolution catalyst, and a diaphragm arranged between the metal anode and the cathode, the bottom and the top of the single cell housing are respectively provided with fluid flow channels, and both ends of the fluid flow channels are respectively provided with openings communicated with the interior and exterior of the housing. The metal anode and/or single cell housing is placed in a closed transitional housing. The transitional housing is a degradable material or can be mechanically damaged by a driving device driven and started by a control device.

A battery module with high impact resistance is provided. A battery module using an elastic body such as rubber for its exterior body covering a battery is provided. A bendable battery module is provided. As the exterior body covering a battery, an elastic body such as rubber is used, and the exterior body is molded in two steps. First, a first portion provided with a depression in which a battery is stored is molded using a first mold. Next, a battery is inserted into the first portion. Subsequently, second molding is performed using a second mold so as to fill an opening of the depression in the first portion, so that a second portion is formed. The second portion serves as a cover for closing the opening of the depression in the first portion. The second portion is formed in contact with part of the electrodes in the battery and part of an end portion of the second exterior body in the battery.

A nonaqueous electrolyte secondary battery includes: an electrode assembly including a separator and positive and negative electrodes stacked through the separator; a covering member disposed on the outer circumferential surface of the electrode assembly; and a nonaqueous electrolyte. The covering member has a multilayer structure including a stretchable resin layer and a heat absorbing layer containing a heat absorbing material.

Aluminum alloy foil that, when used for battery packaging material, unlikely to develop pinholes or cracks even during molding of battery packaging material, and can exhibit excellent moldability. Aluminum alloy foil, which is for use in battery packaging material, wherein, with respect to cross section obtained by cutting aluminum alloy foil in vertical direction to rolling direction of aluminum alloy foil, which is a vertical direction to surface of aluminum alloy foil, proportion of total area of a {111} plane in total area of crystal planes of face-centered cubic structure, obtained by performing crystal analysis using EBSD method, is 10% or more; and with respect to cross section, a number average grain diameter R (rpm) of crystals in face-centered cubic structure, obtained by performing crystal analysis using EBSD method, satisfies following equation: number average grain diameter R≤0.056X+2.0, where X=thickness (rpm) of aluminum alloy foil.