COMPOSITE POWER STORAGE SYSTEM AND POWER STORAGE METHOD

A composite power storage system that efficiently combines high energy density storage and high power density storage is provided.The invention is directed to a composite power storage system including a first power storage device (11a) connected to a power grid (90) or a load device through an inve...

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Bibliographische Detailangaben
Hauptverfasser:	USAMI, TAKASHI, KONNO, HIROMICHI, MORISHIGE, TAKAFUMI
Format:	Patent
Sprache:	eng ; pol
Schlagworte:	CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION SYSTEMS FOR STORING ELECTRIC ENERGY
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Beschreibung
Zusammenfassung:	A composite power storage system that efficiently combines high energy density storage and high power density storage is provided.The invention is directed to a composite power storage system including a first power storage device (11a) connected to a power grid (90) or a load device through an inverter, a second power storage device (11b) connected to the power grid or the load device through an inverter and capable of changing with a larger level of charge/discharge power than the first power storage device, and a control device (13) for controlling charge/discharge of the two power storage devices. The control device (13) instructs the first power storage device (11a) to charge or discharge with first power based on a charge/discharge command with respect to the power grid or the load device. In addition, the control device instructs the second power storage device (11b) to charge or discharge with second power that corresponds to a difference between the charge/discharge command and the first power at a short time period.