Power supply apparatus and controlling method of the same

摘要

A power supply apparatus is provided comprising an input terminal adapted to receive an external AC power; an output terminal adapted to output a first AC power, a first power conversion unit adapted to convert the received external AC power to a first DC power and outputs the first DC power; a second power conversion unit adapted to convert a DC power to a first AC power and outputs the first AC power to the output terminal; a first node electrically connected between the output of the first power conversion unit and the input of the second power conversion unit; a control unit adapted to control the operations of the first and second power conversion units; and a first and a second battery group each connected to the control unit and electrically connectable to first node. The first and second battery groups are distinct from each other and can be separately connected to the first node. The control unit is adapted to dynamically allocate one of the first and the second battery group as a first dynamic battery group and the other of the first and the second battery group as a second dynamic battery group depending on a predetermined condition, wherein the first dynamical group acts in a power supply mode, and the second dynamic battery group acts in a standby mode.