Connecting electrical storage devices in parallel
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United States of America Patent
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Dec 26, 2017
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N/A
app pub date -
Feb 22, 2012
filing date -
Feb 23, 2011
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Abstract
A circuit and a method for connecting a first electrical storage device and a second electrical storage device in parallel is disclosed. The first electrical storage device and the second electrical storage device have in each case a no-load voltage UBat1, UBat2 and an impedance R1 and R2, respectively, and have connecting terminals for charge withdrawal or charge supply. The no-load voltage UBat1 of the first storage device is greater than the no-load voltage UBat2 of the second storage device. In the case of a charge withdrawal, a charge is initially only withdrawn from the first storage device and the second storage device is connected in parallel with the first storage device when the difference of the voltage dropped across the connecting terminals of the first storage device and the no-load voltage UBat2 of the second storage device is less than a predetermined differential add-on voltage.
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