| 摘要 |
The present invention relates to a battery energy storage system using photovoltaic power generation comprising: a battery; a power transformation unit transforming power output via an output end of a solar cell module in accordance to a control signal, outputting the transformed power via a relay end; a current detection unit detecting current output via the output end of a solar cell module; a first voltage detection unit detecting voltage output via the output end of the solar cell module; a charging and discharging control switch unit switching a charging and discharging terminal of the battery to the relay end or a load end; a second voltage detection unit detecting a voltage of the battery; a temperature detection unit detecting a temperature of the battery; and a control unit controlling the charging and discharging control switch unit to switch the battery to the relay end of the power transformation unit in a charging mode to charge the battery, calculating a charging rate of the battery from a first information detected by the temperature detection unit and the second voltage detection unit, calculating a power generation ratio for a maximum power point set from the second information detected by the first voltage detection unit and the current detection unit and controlling the power transformation unit to adjust voltage or current output via the power transformation unit using the calculated charging rate and power generation ratio to charge the battery. The battery energy storage system using the photovoltaic power generation controls charging conditions of the battery using the electric energy information generated in the solar cell modules and the charging state information of the battery; thus enhancing a charging efficiency of the battery. |
