Cooling control of the assembled battery

PROBLEM TO BE SOLVED: To provide a cooling control device of a battery pack capable of keeping humidity of a battery pack housing part low. SOLUTION: The cooling control device 100 for cooling a battery pack 10 composed of one or more of battery modules is provided with a housing portion 21 for housing the battery pack, an evaporator 4 which performs heat-exchanging between surrounding air and cools the surrounding air, an air-blower 3 for blowing air toward the evaporator, a first passage 26 for exhausting out the blown air passing through the housing portion, a second passage 27 for exhausting out without passing the housing portion, a passage switching means 5, 6 for switching over the flow of the blown air, and a control means for controlling the passage switching means. The control means controls the passage switching means for the blow air to pass through the first passage at a cooling operation of the battery pack, and controls the passage switching means for the blow air to pass through the second passage at a drying operation for drying the evaporator. COPYRIGHT: (C)2011,JPO&INPIT