The present invention provides a method, module and terminal for automatically activating a battery to maintain the original performance of the battery to the greatest extent, so as to solve the problems that the service time of a battery after being charged is short and the charging efficiency is low due to a long using time, and. The module for activating the battery comprises a detection unit, an activation unit and a control unit. The method for activating the battery comprises the following steps: a value of at least one first working parameter and a value of at least one second working parameter of the battery are periodically collected, recorded and uploaded; a key section of the at least one first working parameter is determined and a variation value of the second working parameter corresponding to the key section of the first working parameter is computed; and the variation value of the second working parameter is compared with a preset value, the using state of the battery is determined according to a comparison result, and the battery is activated according to the using state. In the invention, the using state of the battery may be monitored in real time, the battery is activated, the original performance of the battery is protected to the greatest extent, and a using experience of a user may be greatly improved.