BATTERY PACK

摘要

A battery module (100) is equipped with a holder (20) that comprises a thermally conductive material and houses multiple element batteries (10), and a rectangular parallelepiped case (30) that houses the holder (20). The holder (20) has multiple housing units (21), and the element batteries (10) are housed in the housing units (21). The case (30) has mutually opposing first and second side surfaces (30a), (30b) which are parallel to the side surfaces of the housing units (21) of the holder (20). A battery pack (200) is formed by stacking multiple battery modules (100) in the direction such that the first and second side surfaces (30a), (30b) overlap each other, with spacers (50a), (50b) of a prescribed width being arranged between adjacent battery modules (100) at the ends in the width direction of and perpendicular to the width direction of the first and second side surfaces (30a), (30b) of the cases (30). A gap (60) through which a cooling medium flows is formed between the first and second side surfaces (30a), (30b) by means of the spacers (50a), (50b).