| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To suppress the discharge of a large-capacity battery even when a short-time power failure is repeated, and avoid a large-capacity battery from running short of charge when a long-time power failure occurs, by preparing a battery which is small-capacity and requires short charging time along with a battery which is large-capacity and requires long charging time, and charging the small-capacity battery first in a short time after power recovery, when an input power supply stops. <P>SOLUTION: The uninterruptible power unit 10 has the small-capacity battery 15 requiring short charging time, the large-capacity battery 16 requiring long charging time, and an inverter 12 which converts DC into AC. When the input power 31 stops, the DC output of the storage battery 15 is supplied to the inverter 12 by closing a switch 17, and the inverter 12 supplies AC to electronic equipment 32, in place of the input power 31, and when the battery 15 reaches a discharge limit, a switch 17 and a switch 18 are closed thereby supplying the output of the storage battery 16 to the inverter 12. After power recovery, the battery 15 is charged prior to the battery 16. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
