006-0006504 02/27/18
Rev R
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UPS-3000 Guide
www.synqor.com
Section V
Battery Pack
Battery Technology
The battery packs for the UPS-3000 Series contain Lithium Polymer rechargeable batteries. For a
given amount of energy storage they are much smaller and lighter than a lead-acid battery. They
are capable of very high discharge rates and fast recharging, and can do so over many cycles and
over a long life. As such they are very suitable for a UPS application. Lithium Polymer batteries
are used in many military applications.
Electronic Circuitry within the Battery Packs
The SynQor battery pack has electronic circuitry within it that:
• controls the charging (including the equalization charging) of the battery
• separates the battery cells into multiple segments
• provides protection of the battery
• runs diagnostics on the battery
• controls the battery pack’s front panel LED indicators
The purpose of separating the battery cells into multiple segments is to allow the battery pack to
remain useful even if one of its battery cells fails. In a normal battery configuration, the failure
of a single cell would disable the entire battery. The SynQor battery packs are designed with
their battery cells arranged in segments that can be disconnected from the other segments by
the internal electronic circuitry. Therefore, if a battery cell fails in one segment, the battery pack
can still operate with the remaining segments (at a reduced battery run-time) until the battery
pack can be serviced.
The Standard Battery Packs (that fit in the UPS-3000S units) have 3 segments, so a failure of a
battery cell would still allow at least 2/3
rds
of the battery pack’s run-time to be available.
The protection features provided by the electronic circuitry include:
• Maximum Current Limit when the battery is being charged/discharged
• Charging/Discharging Limit to avoid over-charging/discharging of the battery
• Charging/Discharging Disable if the battery is too hot or too cold
• Disconnect of the battery from the battery pack’s terminals when the pack is not inserted into
the UPS
