| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a device for estimating a service life of a storage battery with high precision. <P>SOLUTION: The device comprises a temperature sensor 3 for detecting the temperature of the storage battery 2, a current sensor 4 for detecting the input/output currents of the storage battery 2, and a computation controller 5 having a power storage amount detecting means for detecting the amount of power stored in the storage battery 2 from an integrated value of the currents detected by the current sensor 4. The computation controller 5 has a degradation speed calculating means for calculating the degradation speed of the storage battery 2 from an average temperature and an average current value of the battery 2 and the amount of the power stored in the battery 2, and a life calculating means for calculating the service life of the battery 2 by dividing a preset degradation characteristic value by the degradation speed. <P>COPYRIGHT: (C)2004,JPO</p> |
