摘要:
A heat removal unit (4) that removes heat from air in a battery pack (1) in which a battery cell (1a) is accommodated to cool or dehumidify the air is provided. Further, a circulation route (2) that connects the battery pack (1) and the heat removal unit (4) to each other to recirculate the air is provided. Furthermore, a direction controller (5) that controls a flow direction of the air in the circulation route (2) in opposite direction upon cooling and upon dehumidification is provided.