Battery cooling structure, the battery module, and the housing of the battery module

To provide a battery cooling structure for efficiently cooling the battery cells in the battery module. A plurality of columnar battery cells housed in the battery module, are arranged parallel to each other with a gap so as to form a cooling medium passage for cooling medium passes into the battery module. The first side of the battery module, open to the upstream side of the cooling medium path, an inlet for introducing a cooling medium into the battery module, the gaps between the battery cells arranged in the nearest of the first side along it is provided. The second side of the battery module, open to the downstream side of the cooling medium path, the outlet for discharging the coolant to the outside of the battery module, the width direction of the battery cells arranged in the nearest second side It is provided along the center of the.