UNINTERRUPTIBLE POWER SUPPLY

PURPOSE:To enhance the reliability of an uninterruptible power supply employing an enclosed lead battery. CONSTITUTION:The uninterruptible power supply comprises a first service life decision means 11 for deciding whether the temperature of an enclosed lead battery 6 is higher than a predetermined l...

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Bibliographic Details
Main Author HIRACHI KATSUYA
Format Patent
LanguageEnglish
Published 05.08.1994
Edition5
Subjects
CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
GENERATION
SYSTEMS FOR STORING ELECTRIC ENERGY
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Summary:PURPOSE:To enhance the reliability of an uninterruptible power supply employing an enclosed lead battery. CONSTITUTION:The uninterruptible power supply comprises a first service life decision means 11 for deciding whether the temperature of an enclosed lead battery 6 is higher than a predetermined level and altering the counting rate of a timer 11C thus indicating the end of service life of the enclosed lead battery 6 when the timer 11C counts up, and a second service life decision means 12 for indicating the end of service life of the enclosed lead battery 6 when the discharge voltage after short time discharge of the enclosed lead battery 6 drops below a predetermined level. The uninterruptible power supply further comprises a third service life decision means 13 for indicating the end of service of the battery 6 when the open voltage thereof drops below a predetermined level, and a fourth service life decision means 14 for indicating the end of service life of the battery 6 when the internal impedance of the battery 6 is higher than a predetermined value.
Bibliography:Application Number: JP19930023775