Patent ID: 8597813

Claim:
A secondary battery module comprising: a container; a plurality of cells for a secondary battery, said cells being housed inside of said container and arranged flat; an incombustible filler having fluidity, said filler being contained inside of said container and filling clearances defined between said cells; a mica insulator having one of a plate shape and a sheet shape embedded in said incombustible filler; and a heat radiation amount adjusting mechanism; said container including: at least one first wall for partitioning the inside and outside of said container from each other in a direction in which the arrangement plane of said cells extends; and at least one second wall for partitioning the inside and outside of said container from each other in a direction perpendicular to the direction in which the arrangement plane of said cells extends; said at least one second wall having a solid low heat insulating wall having a heat insulating property lower than that of said at least one first wall and having a plurality of fins projecting towards said incombustible filler, wherein a tip of each of said plurality of fins penetrates into said incombustible filler, said mica insulator is interposed between said cells and said solid low heat insulating wall, and said heat radiation amount adjusting mechanism is provided outside of said low heat insulating wall so as to cover the outer surface of said low heat insulating wall.