A battery housing according to exemplary emodiments may include a bottom part, and a first sidewall part and a second sidewall part which are connected to the bottom part and face each other. Any one of the bottom part, the first sidewall part, and the second sidewall part may include a carbon fiber reinforced plastic (CFRP) sheet, and another of the bottom part, the first sidewall part, and the second sidewall part may include a glass fiber reinforced plastic (GFRP) sheet.

A battery housing according to exemplary emodiments may include a bottom part, and a first sidewall part and a second sidewall part which are connected to the bottom part and face each other. Any one of the bottom part, the first sidewall part, and the second sidewall part may include a carbon fiber reinforced plastic (CFRP) sheet, and another of the bottom part, the first sidewall part, and the second sidewall part may include a glass fiber reinforced plastic (GFRP) sheet.

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 tray (20) including a bottom wall (21) and a peripheral side wall (22) erected from an outer periphery of the bottom wall (21) includes a high-strength portion HT having a high tensile strength; and a low-strength portion LT having a tensile strength lower than that of the high-strength portion HT. The low-strength portion LT includes a recessed portion (C) having a corner portion (22C) in a first side wall inner surface (221a) and a second side wall inner surface (222a) which are adjacent to each other at a minor angle and a corner section (21C) on an upper surface (21a) of the bottom wall (21) having a minor angle to each of the first side wall inner surface (221a) and the second side wall inner surface (222a).

The present disclosure discloses a battery assembly and an electronic cigarette using the battery assembly, wherein the battery assembly comprises a main body and a cover, the main body is provided with a battery compartment with an opening, one end of the cover is rotatably mounted on the main body, and the other end is provided with a locking assembly, the end of the battery compartment close to the opening is provided with a limiting part, the cover is locked to the main body and covers the opening when rotating to the locking assembly to be fastened to the limiting part, the main body is further provided with at least one elastic assembly which elastically abuts against the cover when the cover covers the main body.

A battery apparatus includes at least two battery units. Each of the battery units includes at least two batteries. A heat insulating pad is disposed between the adjacent two battery units, and at least a pair of the adjacent two batteries belonging to a same battery unit contact each other with largest surfaces of the batteries.

A battery apparatus includes at least two battery units. Each of the battery units includes at least two batteries. A heat insulating pad is disposed between the adjacent two battery units, and at least a pair of the adjacent two batteries belonging to a same battery unit contact each other with largest surfaces of the batteries.

Provided is a method for designing a battery module including a cell assembly in which a plurality of battery cells are stacked and a module case having an internal space in which the cell assembly is accommodated, the method including: a) setting a lowermost portion of the module case with respect to a direction of gravity as a design side, and setting a region between the design side and the cell assembly as a design space; and b) obtaining a relative permittivity ε.sub.r of the design space satisfying Equation 1 ε.sub.rε.sub.0A.sub.0/T.sub.1≤PCy by assuming that a shape of the design space is a form of a film having an area of A.sub.0 and a thickness of T.sub.0.

The battery module includes a battery cell stack in which a plurality of battery cells are stacked, a frame member for housing the battery cell stack and having an opened upper part, and an upper plate for covering the battery cell stack on an upper part of the frame member, wherein the frame member comprises two side surface parts facing each other and a bottom part connecting the two side surface parts, and wherein a projected part projected inward is formed in the side surface part.

A sheet metal assembly includes a drawn metal sheet constructed of a metal material. The drawn metal sheet defines a surface and includes one or more stiffening features disposed along the drawn metal sheet. The one or more stiffening features represents a raised area disposed along the surface of the drawn metal sheet. Each of the one or more stiffening features include a predefined draw depth ranging from about twenty millimeters to about eighty millimeters.