Power storage apparatus, method of operating the same, and power storage system
AssigneeSamsung SDI Co., Ltd.
InventorChong-Sop Moon
Life of this patent
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Abstract
A power storage system and method are disclosed. The system is connected to a load, a power grid, and a power generation system. When the grid is in an abnormal state, a battery is simultaneously charged with power from the power generation system and used to supply power to the load.
Claims14
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.
A method of operating a power storage apparatus connected to a power generation system, a power grid, and to a load, the apparatus comprising a power conversion unit, a bi-directional converter, a bi-directional inverter, a grid connector, a battery comprising a plurality of battery units, and an integrated controller for controlling the power conversion unit, the bi-directional converter, the bi-directional inverter, the grid connector, and the battery, the method comprising:
- disconnecting the power grid from the power storage apparatus as a result of the grid being in an abnormal state;
- monitoring the charging and discharging status of each of the plurality of battery units;
- and
- according to the charging and discharging status of each of the plurality of battery units discharging certain battery units to supply power to the load, and simultaneously charging other battery units with power generated by the power generation system.
Dependencies are inferred from the claim text.