Storage battery control device, charging station, and storage battery control method

#This application claims priority to Japanese Patent Application No. 2010-174986 filed on Aug. 4, 2010, the entire disclosure of which is incorporated herein by reference.

#The present invention relates to a storage battery control device, a charging station, and a storage battery control method. In particular, the present invention relates to a storage battery control device, a charging station, and a storage battery control method suitable for reducing ill effects on voltage stability in an electric power system.

#A great number of customers are connected to an electric power system. In such an electric power system, it is desirable that the electric power to be consumed by the customers be stably supplied from the supplier. In order to realize the stable supply of electric power, there has been proposed a technique that prevents system down of the electric power system by preparing for power outage, instantaneous power interruption, etc. that might occur in the near future by employing a duplexed (redundant) power feeding system, as described in JP, A 2007-172535, for example.

#FIG. 1 shows an example of the configuration of a storage battery system interconnection control device installed in an electric vehicle.

#FIG. 2 shows an example of processing by the storage battery system interconnection control device installed in an electric vehicle.

#FIG. 3 shows another example of the configuration of the storage battery system interconnection control device installed in an electric vehicle.

#Referring now to the drawings, a description will be given in detail of preferred embodiments in accordance with the present invention. First, the outline of each embodiment will be explained for a better grasp thereof.

#In a first embodiment designed assuming the charging method called “Regulated”, in order to reduce voltage fluctuation around each electric vehicle about to execute the charging in cases where a lot of electric vehicles start the charging all at once, an electric vehicle is equipped with a system interconnection control device which is characterized by a step of calculating a voltage drop by applying a load current and a step of controlling the charging quantity of the electric vehicle based on the voltage drop.

#In a second embodiment designed assuming the charging method called “Regulated”, in order to reduce voltage fluctuation around each electric vehicle about to execute the charging in cases where a lot of electric vehicles start the charging all at once, a charging station is equipped with a system interconnection control device which is characterized by a step of calculating the voltage drop by applying a load current and a step of controlling the charging quantity of the electric vehicle based on the voltage drop.