| 摘要 |
<p>It is an object of the present invention to provide a technique for specifically estimating a life expectancy of a secondary battery. The technique performs the steps of: determining an accumulating portion resistance of the secondary battery from an internal resistance thereof; determining an accumulating portion resistance increase coefficient under operating conditions of the secondary battery; and estimating a life expectancy of the secondary battery from the accumulating portion resistance and the accumulating portion resistance increase coefficient.</p> |
