Power storage system including a plurality of battery modules and on/off devices or voltage converters
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United States of America Patent
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Feb 18, 2014
Grant Date -
Jun 2, 2011
app pub date -
Oct 30, 2008
filing date -
Oct 30, 2008
priority date (Note) -
Withdrawn
status (Latency Note)
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Abstract
An object is to reliably conduct cell balancing operation while suppressing deterioration of batteries and maintaining operating efficiency. When the cell balance control by the cell balancing circuit 3 is started, the system control device 30 sets an on/off device corresponding to the arm where the cell balance control is conducted to the open state; and when the cell balance control is completed, and the difference between the terminal voltage of a battery pack of the arm where the cell balance control has been conducted and the terminal voltages of the battery packs of the other arms falls within a preset allowable range, sets the on/off device, which has been in the open state, to the closed state.
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