A technology for improving molding properties while minimizing curling after molding in a battery packaging material comprising a laminate that is provided with a barrier layer, a heat-sealable resin layer positioned on one surface side of the barrier layer, and a polyester film positioned on the other surface side of the barrier layer. This battery packaging material is configured from at least a laminate provided with a barrier layer, a heat-sealable resin layer positioned on one surface side of the barrier layer, and a polyester film positioned on the other surface side of the barrier layer. The birefringence of the polyester film is in the range of 0.016-0.056.

A technology for improving molding properties while minimizing curling after molding in a battery packaging material comprising a laminate that is provided with a barrier layer, a heat-sealable resin layer positioned on one surface side of the barrier layer, and a polyester film positioned on the other surface side of the barrier layer. This battery packaging material is configured from at least a laminate provided with a barrier layer, a heat-sealable resin layer positioned on one surface side of the barrier layer, and a polyester film positioned on the other surface side of the barrier layer. The birefringence of the polyester film is in the range of 0.016-0.056.

The present invention provides a battery package used in an assembled battery, which can miniaturize the assembled battery and can impart sufficient durability; an assembled battery which can be miniaturized and have sufficient durability by provision with the relevant battery package; and a battery device provided with the relevant assembled battery.

An exterior material for a power storage device, the exterior material being constituted by a laminate including at least a substrate layer, a barrier layer, an adhesive layer, and a thermally adhesive resin layer, in this order, wherein a corrosion-resistant film is provided at least on the surface on the adhesive layer-side of the barrier layer, and when a cross-sectional observation image is acquired using a scanning electron microscope, for the cross section in the thickness direction of the corrosion-resistant film, the corrosion-resistant film is observed in a belt shape in the cross-sectional observation image.

A cell, including an electrode assembly and a shell. The electrode assembly includes tabs, and the electrode assembly is disposed in the shell. The shell includes a packaging part and a sealing part connected to the packaging part, where the sealing part is formed by extending the packaging part outward, the electrode assembly is located in the packaging part, and the tabs penetrate out of the sealing part. The packaging part includes a side wall, where notches are provided in the sealing part, the notches are formed by recessing an exterior circumferential edge of the sealing part towards a joint of the sealing part and the packaging part, and the sealing part is attached to the side wall.

A cell, including an electrode assembly and a shell. The electrode assembly includes tabs, and the electrode assembly is disposed in the shell. The shell includes a packaging part and a sealing part connected to the packaging part, where the sealing part is formed by extending the packaging part outward, the electrode assembly is located in the packaging part, and the tabs penetrate out of the sealing part. The packaging part includes a side wall, where notches are provided in the sealing part, the notches are formed by recessing an exterior circumferential edge of the sealing part towards a joint of the sealing part and the packaging part, and the sealing part is attached to the side wall.

A method of packaging a battery device with a metal shell, comprising: applying a waterborne two-component polyurethane composition to the metal shell of the battery device, and drying the applied polyurethane composition to form a packaging layer; wherein the polyurethane composition comprises, (A) an aqueous dispersion comprising a hydroxyl-functional polymer, wherein the hydroxyl-functional polymer comprises, by weight based on the weight of the hydroxyl-functional polymer, from 20% to 50% of structural units of a hydroxy-functional alkyl (meth)acrylate; from 0.1% to 10% of structural units of an acid monomer, a salt thereof, or mixtures thereof; and structural units of a monoethylenically unsaturated nonionic monomer; and (B) a polyisocyanate.

A cell includes an electrode assembly and a tab electrically connected to the electrode assembly, the packaging housing includes a housing body, a cover, and a polymer layer. The housing body is provided with an accommodating portion, where the accommodating portion is configured to accommodate the electrode assembly, the tab extends from the accommodating portion to the outside of the housing body, and the housing body is further provided with a first sealing portion extending from an edge of an opening of the accommodating portion to the outside of the housing body along a first direction. The cover is provided with a second sealing portion extending along the first direction. The cover covers the opening of the accommodating portion, and the first sealing portion and the second sealing portion are disposed opposite to each other. The polymer layer is disposed between the first sealing portion and the second sealing portion.

A UV curable dielectric coating is described. The curable coating can include one of more acrylate monomers, a urethane prepolymer, a crosslinker, at least one adhesion promoter, a photoinitiator, and optionally one or more fillers and/or additives. The coating can be used to insulate battery cells and battery packs, such as those used in electric vehicles. The coatings can be easily applied and quickly cured. The cured coatings can have high adhesion strength, even after exposure to wet conditions.

A UV curable dielectric coating is described. The curable coating can include one of more acrylate monomers, a urethane prepolymer, a crosslinker, at least one adhesion promoter, a photoinitiator, and optionally one or more fillers and/or additives. The coating can be used to insulate battery cells and battery packs, such as those used in electric vehicles. The coatings can be easily applied and quickly cured. The cured coatings can have high adhesion strength, even after exposure to wet conditions.