Battery system and method for evaluating battery system
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United States of America Patent
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Dec 27, 2016
Grant Date -
Oct 22, 2015
app pub date -
Oct 4, 2013
filing date -
Oct 5, 2012
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Abstract
A battery system includes: a secondary battery; a memory portion that stores information which includes a measurement frequency, a measurement temperature, and an initial limiting capacitance of one secondary battery; a temperature measuring section; a power supply section which applies an AC signal of 0.5 mHz to 10 mHz, to the secondary battery at 40° C. to 70° C.; a measuring portion which measures an impedance of the secondary battery by the AC signal; and a calculating portion that calculates the degree of degradation of the secondary battery.
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