The present disclosure includes a wireless control system, a wireless connection method, and a battery pack. The wireless control system includes a master and a plurality of slaves. Each slave wirelessly transmits a response packet including an ID of each slave when it receives a first command packet wirelessly transmitted from the master. The master sets, as a first group, each slave to which is allocated the ID included in each response packet wirelessly received within a predetermined period of time from a time point at which the first command packet was transmitted, and sets, as a second group, each slave not set as the first group. The master wirelessly transmits a second command packet including the ID of each slave belonging to the second group.