Patent ID: 9041354
Filing Date: 2015-05-26
Classification: H02J,Y02B,Y02E

Abstract:
1. An energy storage system, comprising: a maximum power point tracking (MPPT) converter, which converts power generated by a renewable energy generating system and outputs the converted power to a first node; a bi-directional inverter, which is interposed between the first node and a second node, to which a grid and an AC load are connected, converts a first DC power input via the first node to AC power and outputs the converted AC power to the second node, and converts AC power provided by the grid to the first DC power and outputs the converted first DC power to the first node; a battery for storing a second DC power; a bi-directional converter, which is interconnected between the battery and the first node, converts the second DC power output by the battery to the first DC power and outputs the converted first DC power to the bi-directional inverter via the first node, and converts the first DC power output by the bi-directional inverter via the first node to the second DC power and stores the converted second DC power in the battery; at least two DC/DC converters, which are for respectively converting DC power to be provided to at least two DC loads, are interconnected between the bi-directional converter and the at least two DC loads; and an integrated controller, which controls the overall operations of the MPPT converter, the bi-directional inverter, and the bi-directional converter, the integrated controller controls each of the at least two DC/DC converters based on an amount of the second DC power stored in the battery and a priority order of the at least two DC loads.