Service Life Of The Batteries And Handling; Service Life Of The Batteries - Siemens SITOP UPS1600 Equipment Manual

Installation

7.9 Service life of the batteries and handling

7.9 Service life of the batteries and handling
7.9.1

Service life of the batteries

Physical-chemical effects are responsible for the aging process of rechargeable batteries.
These effects result in decomposition of the battery materials. This aging process depends on
many influencing factors. A distinction is made between time-based and cyclic aging.
Time-based aging takes into account the fact that even when it is not used, a battery loses its
storage capacity over time. This particular aging process essentially depends on the time and
the ambient temperature.
On the other hand, cyclic aging especially depends on the number of cycles and the depth of
discharge. The loss of battery capacity is given by the "State of Health" (SoH), which
represents a measure for the maximum residual capacity that can be used that is specified as
a percentage of the rated capacity.
Generally, the term service life is used to define the aging process. A new battery has a
maximum usable capacity, which corresponds to its rated capacity (Begin of Life). As it ages,
when a battery reaches a defined maximum residual capacity value that can be used (e.g.
according to the EUROBAT definition, 80 % of its rated capacity), then this point in time is
frequently called End of Life.
Note
To positively influence the aging process of batteries, do not store them for an unnecessarily
long time before using them, do not subject them to unnecessarily high ambient
temperatures, and in the application, do not discharge these unnecessarily often and
unnecessarily deep.
The expected service life
The service life values provided by the battery manufacturer can be used as approximate
value for the expected service life. These values were determined under defined laboratory
conditions. However, as a result of the many varying influencing factors in real operation, the
actual service life can deviate from the service life determined under laboratory conditions.
The SITOP Selection Tool can also be used to select a suitable battery module. This tool helps
you find the most suitable module for your specific application: TIA Selection Tool
(http://www.siemens.com/tst-powersupply)
SITOP BAT1600 Pb battery module
Article number: 6EP4133-0GA00-0AY0, 6EP4135-0GE00-0AY0 and 6EP4137-0GE00-0AY0
The service life of the 3.2 Ah and the 12 Ah lead-gel batteries is specified by the
manufacturer to be 3 - 5 years corresponding to the EUROBAT Class, for 38 Ah batteries,
10 - 12 years.
EUROBAT assumes a constant operating temperature of 20 °C. When the operating
temperature is exceeded, for each 10 °C, it can be assumed that the service life is halved.
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SITOP UPS1600 / BAT1600 / UPS1100
Equipment Manual, 07.2021, A5E37775406-11-76