| 摘要 |
PROBLEM TO BE SOLVED: To provide a deterioration symptom detection method and device for a battery power supply capable of performing deterioration symptom detection for a battery power supply with accuracy.SOLUTION: A deterioration curve peculiar to a battery is calculated from time change of a voltage value after power feeding, of a battery power supply. A time required for the voltage value after power feeding to drop to a predetermined voltage threshold is calculated from the deterioration curve. In the case that the calculated drop time is lower than a threshold of a predetermined voltage drop time, an alarm is issued as a deterioration symptom of the battery power supply. |
