| 摘要 |
PURPOSE: A battery module is provided to stably discharge the gas generated from the inside of the battery module, because of the installation of an air permeable film in the bent hole of a housing, which surrounds the battery module. CONSTITUTION: A battery module comprises: a plurality of secondary batteries; a housing(110), in which a vent hole(114a) is formed, and the secondary batteries are mounted; and a valve member including an air permeable film consisting of teflon based resin, in which holes, of which diameter is larger than gas molecule, and smaller than water molecule, are formed for preventing the vent hole. The air permeable film additionally comprises a support film, which is laminated on a blocking film. |
