Series/parallel connection scheme for energy storage devices
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United States of America Patent
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Aug 25, 2015
Grant Date -
Feb 28, 2013
app pub date -
Aug 29, 2011
filing date -
Aug 29, 2011
priority date (Note) -
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Abstract
A battery pack has series-parallel connected battery cells. An inrush current limiting circuit has current limiting devices and a current limiting tracking means limits inrush current from shorted battery cells. Each current limiting tracking means is coupled to the current limiting devices such that they limit an inrush current from parallel neighbor battery cells when one battery cell on the column shorts. The current limiting devices are variable buffer resistors with a positive temperature coefficient. The current limiting tracking means are heat sinks that thermally couples the buffer resistors together such that the buffer resistors increase in resistance with a temperature increase caused by current flowing through the buffer resistor associated with the shorted battery cell. Current regulating elements are in series with columns of battery cells for preventing inrush current to the columns of the battery cells.
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