| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a highly reliable electric power storage device of an elevator, by accurately predicting and notifying a service life progress degree of a storage battery. <P>SOLUTION: This electric power storage device has the storage battery 4 or a temperature detector 7 for measuring its surrounding temperature, and a storage battery monitoring device 8 for determining the service life progress degree of the storage battery 4 by the sum total of respective values provided by calculating the storage battery expected service life ratio of the respective temperature divisions T1, T2, T3, etc. to cumulative times t1, t2, t3, etc. with every temperature division, by measuring the cumulative times t1, t2, t3, etc. with every temperature division T1, T2, T3, etc. covered by the storage battery 4, by setting a temperature division of dividing the temperature measured by the temperature detector 7 with every predetermined temperature; and notifies the service life progress degree of the storage battery 4. <P>COPYRIGHT: (C)2007,JPO&INPIT |
