COOLING STRUCTURE OF SECONDARY BATTERY FOR VEHICLE

To provide a cooling structure of a secondary battery for a vehicle which can homogenize temperatures of a plurality of the secondary batteries.SOLUTION: A cooling structure of a secondary battery for a vehicle comprises: a plurality of the secondary batteries which are aligned in one row; a refrigerant passage which is formed along an alignment direction of a plurality of the secondary batteries in a lower region of a plurality of the secondary batteries, and sets a lower face of a plurality of the secondary batteries as a part of a partitioning wall; a plurality of branch passages which are individually branched from the refrigerant passage toward a sideway of a plurality of the secondary batteries, and set a side face of the secondary batteries as a part of the partitioning wall; and a plurality of door bodies which are arranged in a boundary between a plurality of the branch passages and the refrigerant passage, and can open the branch passages by a rise of a temperature of the refrigerant which stays in each of a plurality of the branch passages.SELECTED DRAWING: Figure 4 【課題】複数の二次電池において温度を均一にすることができる車両用二次電池の冷却構造を提供する。【解決手段】車両用二次電池の冷却構造は、一列に整列した複数の二次電池と、複数の二次電池の下方域において複数の二次電池の整列方向に沿って設けられ、複数の二次電池の下面を区画壁の一部とする冷媒通路と、冷媒通路から複数の二次電池の側方に向けて個別に分岐し、二次電池の側面を区画壁の一部とする複数の分岐通路と、複数の分岐通路のそれぞれと冷媒通路との境界に設けられ、複数の分岐通路のそれぞれに滞留する冷媒の温度上昇によって分岐通路を開放可能な複数の扉体と、を備える。【選択図】 図４