Patent ID: 8575780

Claim:
A power storage apparatus, comprising: a power conversion unit connected between a power generation system and a first node, wherein the power conversion unit is configured to convert power generated by the power generation system into a DC voltage for the first node; a battery management system (BMS); a bi-directional converter connected between the BMS and the first node, wherein the bi-directional converter is configured to convert the DC voltage of the first node to a DC voltage for the BMS and to convert the DC voltage of the BMS to the DC voltage of the first node; a bi-directional inverter connected between the first node and a second node, wherein the bi-directional inverter is configured to invert the DC voltage of the first node into an AC voltage for a load or for a power grid and to convert an AC voltage from the power grid into the DC voltage of the first node; a grid connector for connecting the power grid to the second node; a battery comprising a plurality of battery units configured to be charged by power from at least one of the power generation system and the grid, and to be discharged to supply power to the load; and an integrated controller configured to determine a state of the grid, and if the grid is in an abnormal state to control the grid connector to disconnect the power grid from the second node, and the integrated controller is configured to control the power conversion unit, the bi-directional converter, the bi-directional inverter, the grid connector, and the battery, wherein if the grid is in an abnormal state the integrated controller monitors a charging and discharging status of the battery and controls the battery to supply power to the load and to be simultaneously charged with power generated by the power generation system.