Battery Case Unlocking Apparatus, Battery Case, and Quick Battery Case Replacement System

A battery case unlocking apparatus, a battery case, and a quick battery case replacement system. The battery case unlocking apparatus comprises: a mount (), an extensible/retractable mechanism (), a transmission mechanism (), and a locking mechanism (). The locking mechanism () is used for locking and fixing a body () of a battery case to a battery holder () of an electric vehicle. The extensible/retractable mechanism () passes through the mount () and carries out extension/retraction movement in the mount () relative to the transmission mechanism () to drive the transmission mechanism () to move between the extensible/retractable mechanism () and the locking mechanism (), thereby controlling the locking or unlocking of the locking mechanism (). The battery case comprises the body () and the battery case unlocking apparatus. The quick battery case replacement system comprises: the battery holder (), a replacement device (), and the battery case.