BATTERY CONTROL DEVICE, CONTROL METHOD, AND NON-TRANSITORY STORAGE MEDIUM

A battery control device for controlling a battery connected to a power supply line via a relay, the battery control device comprising: a detection unit that detects a predetermined signal; and a control unit that, based on detection of a predetermined signal, activates a predetermined function when it is determined that any one of at least three predetermined activation conditions is satisfied, and stops a predetermined function when it is determined that all three activation conditions are not satisfied.