Recommendations For A Long Ups Service Life - Bicker UPSI-1208D User Manual

UPSI-1208(D) | UPSI-2406(D)

23 Recommendations for a long UPS service life

EDLCs do not have an actual "End of Life" (EOL). Over time, the capacity decreases and the
ESR (equivalent series resistance) increases. However, EOL is often defined as a reduction
in capacity to 70 % and a doubling of the ESR. An important aspect for the aging of the
EDLCs is the end-of-charge voltage and the operating temperature.
Li-ion batteries also age over time depending on cycles, operating temperature and level
of end-of-charge voltage.
The end-of-charge voltages are optimized so that they are at an optimium between
service life and performance.
To extend the lifetime of the system, battery packs should not be placed near sources
of heat. The UPS and batteries should be placed within good air-circulation. Using Li-Ion
batteries always a larger capacity than actually needed should be selected. The less deep
the packs are discharged, the longer the service life lasts.
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