Browse Prior Art Database

Configurable Battery Backup Time

IP.com Disclosure Number: IPCOM000114379D
Original Publication Date: 1994-Dec-01
Included in the Prior Art Database: 2005-Mar-28
Document File: 2 page(s) / 51K

Publishing Venue

IBM

Related People

Honeycutt, KA: AUTHOR

Abstract

Described is a switch, applied to a Uninterruptable Power Supply (UPS) having advanced features, allowing the user to choose between a "TIMER" option and a "RUN TILL BATTERY EMPTY" option, when a the power supply unit is setup with a computer not having advanced interfaces.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 58% of the total text.

Configurable Battery Backup Time

      Described is a switch, applied to a Uninterruptable Power
Supply (UPS) having advanced features, allowing the user to choose
between a "TIMER" option and a "RUN TILL BATTERY EMPTY" option, when
a the power supply unit is setup with a computer not having advanced
interfaces.

      In industrial and office environments, the use of a UPS with a
computer is becoming a common method to supply power to the computer
if the main external (AC or DC) power is interrupted.  The energy
required for this process is typically provided by rechargeable
batteries, which can operate the system for 30 seconds to 10 minutes
without external power.  If external power is not restored within the
timeframe through which the battery can supply power, the computer
turns off as the battery is exhausted.  When external power is
restored, the computer turns back on and begins recharging the
battery.  However, a subsequent power outage occurring soon after
power is restored cannot be properly handled, as the battery is not
yet recharged, so the computer quickly shuts down.

      Therefore, some UPS supplies have a timer for determining the
maximum time the system is allowed to operate when external power has
been lost.  For example, this time is set at twelve seconds on
certain IBM Industrial Computers.  If a power outage is longer than
the time permitted by the timer, the computer is shut down, but the
battery is not completely drained, so seve...