Electric energy storage units connected in series and selectively charged/discharged via a balancing circuit or directly from a charger or to a load
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United States of America Patent
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Apr 19, 2016
Grant Date -
Aug 2, 2012
app pub date -
Mar 2, 2012
filing date -
Sep 2, 2009
priority date (Note) -
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Abstract
An electric energy storage system is designed to equally utilize electric energy storage banks during charging/discharging, and keep fluctuation of an input voltage from a charger or an output voltage to a load, within an arbitrary range, while equally utilizing the electric energy storage banks during charging/discharging. The electric energy storage system comprises an electric energy storage module, a charger, a balancing circuit, a voltage detection section, taps led out, respectively, from one of opposite terminals of the electric energy storage module and/or the other terminal of the electric energy storage module and/or one or more of series-connection points between the electric energy storage units, through respective switches, and a switch control section for switching the switches such that one of the taps is connected to one of opposite terminals of the charger. The switch control section is operable to sequentially switch the switches according to progress of the charging.
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