Battery state estimating apparatus
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United States of America Patent
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May 12, 2020
Grant Date -
Sep 27, 2018
app pub date -
Mar 8, 2018
filing date -
Mar 22, 2017
priority date (Note) -
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status (Latency Note)
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Abstract
A battery state estimating apparatus is provided with: an acquirer configured to obtain complex impedances of a battery at a different temperatures; a calculator configured to calculate a slope of a first straight line or a slope of a second straight line as an impedance slope, wherein the first straight line connects values of the complex impedances at a first predetermined frequency, wherein the second straight line connects a convergence point and at least one of values of the plurality of complex impedances at a second predetermined frequency; and an estimator configured to estimate a battery state associated with the battery on the basis of the impedance slope and a relation stored in a storage, if it is determined by a determinator that a temperature of the battery is in a predetermined temperature area.
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