Accommodating device and electric power system

Abstract

A battery exchanger (10) is provided with a slot sleeve (23) for accommodating a mobile battery (12) in an insertable and removable manner. The slot sleeve (23) has a tubular portion (23b) and a bottom portion (23a) connected to the tubular portion (23b). The tubular portion (23b) surrounds the outer periphery of the mobile battery (12) accommodated in the slot sleeve (23). The bottom portion (23a) has an air inlet (42c) for causing the inside and the outside of the slot sleeve (23) to communicate with each other, and the tubular portion (23b) has exhaust slits (22b2) for causing the inside and the outside of the slot sleeve (23) to communicate with each other.