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.

Exterior thermal battery-cover for a battery housing characterised in that the cover comprises at least a thermal insulating layer with a thermal resistance (R-value) of at least 0.070 m.sup.2.Math.K/W, preferably with a thermal resistance of at least 0.078 m.sup.2.Math.K/W and whereby the thermal insulating layer is at least one of a fibrous layer, an open cell foam layer or closed cell foam layer.

Exterior thermal battery-cover for a battery housing characterised in that the cover comprises at least a thermal insulating layer with a thermal resistance (R-value) of at least 0.070 m.sup.2.Math.K/W, preferably with a thermal resistance of at least 0.078 m.sup.2.Math.K/W and whereby the thermal insulating layer is at least one of a fibrous layer, an open cell foam layer or closed cell foam layer.

This application relates a battery pack and an electric vehicle. The battery pack includes a housing provided with a bottom surface and a top surface. A battery assembly is arranged in the housing. The battery assembly includes a structural reinforcing member and a cell sequence formed by connecting multiple cells. An outer surface of the cell includes a bottom surface, a top surface, first lateral surfaces, and two opposing second lateral surface. The bottom surface of the cell faces the bottom surface of the housing, and the top surface of the cell faces the top surface of the housing. The first lateral surface has a largest area. The multiple cells are arranged with second lateral surfaces thereof facing each other to form the cell sequence, and the structural reinforcing member is fixedly bonded with a first lateral surface of each cell in the cell sequence. The battery assembly abuts with the bottom surface of the housing to be supported in the housing.

There are provided a thermally expandable fire-resistant material for battery pack and a fire-resistant sheet for battery pack, which have high flame retardancy and thermal insulation properties to thermal runaway and ignition of on-vehicle batteries. The thermally expandable fire-resistant material for battery pack is one to be used for a battery pack to be mounted on vehicles, and contains a resin and a thermally expandable compound, and has an expansion ratio in a case where heated at 600° C. of 2.5 times or more.

A rubber molded body is provided that is attachable to an outer circumference of one or more lithium ion secondary battery cells each having a safety valve or an exhaust hole in a manner that the safety valve or the exhaust hole is at least covered with the rubber molded body. The rubber molded body is further characterized in that a thermal conductivity measured by a unidirectional heat flux stationary comparison method pursuant to JIS H7903: 2008 (measured at 33° C.) is less than 1.0 W/m.Math.K, a portion that covers the safety valve or the exhaust hole has a thickness greater than or equal to 0.3 mm and less than-or equal to 10.0 mm, and a surface hardness measured with a type A durometer pursuant to JIS K6253 is greater than or equal to 50 and less than or equal to 90.

The battery pack has a laminated body in which unit cells are laminated one on another, a cell case having a first opening and containing the laminated body, and a first lid member to tightly close the first opening. The first opening is positioned to face, in connection with a unit cell laminated direction, a first face of the laminated body. The first lid member is configured to, if an internal pressure of the cell case is lower than atmospheric pressure, deform while keeping the tightly closing state, come into contact with the first face of the laminated body, and apply a pressure based on a differential pressure between atmospheric pressure and the internal pressure of the cell case to the contacting face.

The invention relates to a cover structure the SMC main body of which is simultaneously pressed and bonded with two additional layers in a bonding press.

A battery assembly for a vehicle, may include a battery case including a front wall structure, a rear wall structure, and a pair of side walls connected to the front wall structure and the rear wall structure; and a battery cover with which a top portion of the battery case is covered, wherein the front wall includes a front flat wall and a pair of front inclined walls which are opposite on both sides of the front flat wall, and each front inclined wall is formed to be inclined from the front flat wall to a front end portion of a corresponding side wall among the pair of side walls.

A battery module includes: a plurality of battery cells; and an insulating cover disposed on one side of the plurality of battery cells, the insulating cover comprising a venting guide configured to emit flame or gas occurring in one or more of the plurality of battery cell.