BATTERY MODULE

Provided is a battery module including: a metal module housing that has a closed interior space; and multiple secondary batteries that have a vertically long shape and are housed vertically in the interior space and juxtaposed parallel to each other. The module housing has an upper excess space above the secondary batteries in the interior space, the upper excess space being capable of mitigating a pressure increase in the module housing due to ignition of gas generated in the event of an abnormality in the secondary batteries.