Battery assembly with cooling

The present invention relates to a battery cooling device that can effectively cool a battery with a simple structure. A battery cooling device (100) according to an exemplary embodiment of the present invention includes a pair of battery packs (30) arranged to face each other, interposing a gap therebetween and forming a first flow path (50) therein and a housing (40) receiving the pair of battery packs (30) and forming a second flow path (60) between the housing (40) and the pair of battery packs (30) along the inner surface.