Abstract: This rack structure includes: a battery shelf (55) for accommodating a plurality of battery units (30); a rack (10) in which at least one battery shelf (55) is mounted; and a connector (180) which electrically connects the battery shelf and the rack with each other. The connector (180) has a first connector member (181) disposed on a rear surface of the battery shelf and a second connector member (191) disposed on the rack side, and is configured such that the first connector member (181) and the second connector member (191) are connected with each other while the battery shelf (55) is moved to a predetermined mounting position in the rack.

Abstract: A battery shelf assembly (50) includes: a plurality of battery units (30); a battery shelf (55) accommodating the battery units (30), configured such that the battery units (30) are mounted or dismounted by sliding movement in the battery shelf; and a power connector (120) connecting the battery unit (30) and the battery shelf (55) so that power of the battery unit can be output. The power connector (120) has: a first connector member (121) disposed at an electrode terminal of the battery unit (30); a second connector member (131) disposed on the battery shelf side and configured to connect with the first connector member (121); and a floating structure that absorbs a position gap between the first and second connector members.