Battery pack
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United States of America Patent
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Sep 25, 2018
Grant Date -
May 25, 2017
app pub date -
Nov 17, 2016
filing date -
Jun 4, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
A first cell string provided in a first battery module has a larger allowable current value than a plurality of cell strings provided in second and third battery modules. The battery module is provided with a current limiting circuit that limits the charge and discharge currents of the second cell string. When the current value detected by a current sensor is zero, the switch is turned off. In this condition, when the terminal voltage value of the third cell string is different from the terminal voltage value of the second cell string, a second switch switches the connection between the second and third battery modules in order to interpose the current limiting circuit between the second and third cell strings.
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