Battery remaining power predicting device and battery pack
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United States of America Patent
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Aug 28, 2018
Grant Date -
Sep 15, 2016
app pub date -
Mar 3, 2016
filing date -
Mar 12, 2015
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Abstract
A battery remaining power predicting device predicts a remaining power of a battery by a first computing flow for regressively calculating a battery open circuit voltage and the battery remaining power, based on a battery voltage and a battery temperature both measured, and a current value and a battery internal resistance calculated from a change in the battery remaining power. Further, the battery remaining power predicting device predicts the remaining power of the battery by a second computing flow for calculating a battery capacity and a battery internal resistance, based on a battery remaining power before the start of a constant current discharge, a battery voltage immediately before the stop of the constant current discharge, and a settled battery voltage after the stop of the constant current discharge, after the constant current discharge is performed for a predetermined period as a battery load.
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