Patent attributes
A battery module includes a plurality of cylindrical battery cells, each having at least two electrode terminals of different polarities at one end portion; an upper case and an lower case including an accommodating portion where a space in which the cylindrical battery cells are inserted and accommodated is formed, a gas discharge path extending in front, back, left, and right directions to externally discharge a gas discharged from the cylindrical battery cells and where an open portion externally exposed is formed, and a gas discharge hole opened such that the gas discharge path is connected to the outside; a cover sheet between the upper case and the lower case to cover the open portion of the gas discharge path; and a plurality of wire type bus bars to electrically contact and connect the electrode terminals of the cylindrical battery cells to each other.
