FIAMM SoNick I&O - 48TL160H rev.0
– July 2013
pag.15
4.4 Discharging and Rated Capacity
A discharge is always possible in case the battery is in float or charge state, when the green LED
is on solid. When the battery is performing a warm-up or is an alarm condition a discharge is not
possible (green LED blinking).
In case the battery goes into discharge, the yellow LED turns on solid and, when the state of
charge of the battery is under 20% of its nominal capacity value this LED turns to a blinking
indication.
The rated capacity of The Fiamm SoNick 48TL160H battery is 160 Ah. At higher rates the capacity
is lower because of the higher internal resistance losses; at lower rates the useful capacity is lower
due to the fact that some power is needed to maintain the battery at the internally working
temperature and this power is drawn from the battery itself. The 48TL160H discharge performance
is not significantly affected by temperature variations, especially compared with other battery
technologies. Even if the outside ambient temperature varies greatly, its internal temperature will
remain within the operative range and then the capacity and life are not affected.
Detailed information is available in the appendix IV section of this manual.
4.5 Battery Cool Down
The 48TL160H battery is kept at its operating temperature with three internal heaters, controlled by
the BMS and it is insulated with special insulation material to limit both the thermal losses and the
temperature gradients inside the battery. If the battery is operative (ON-LINE), the thermal
management of the BMS keeps the internal temperature at a minimum of 265°C.
As soon as the battery is turned off (by the power switch) the BMS is powered off and so the
heating elements: the internal temperature starts to decrease with a typical behavior (see appendix
V section for details).
If the battery is removed from the DC bus with its power switch in the on position, the battery starts
to use its own energy to keep the internal temperature. After a number of hours, depending on the
SOC, the battery turns off (when its SOC=0%) and the temperature starts to decrease.
4.6 Battery Internal Resistance
The internal battery resistance varies depending on the different states of charge;
Average value is 44mOhm, see appendix VI section for details.
4.7 Maintenance Free
The FIAMM SoNick Sodium Nickel Metal Chloride battery does not require any maintenance.
5 TECHNICAL INFORMATION
5.1 FIAMM SoNick Battery Description
The battery’s primary function is to store electrical energy and to supply it to an external load when
needed. The battery management system also provides secondary functions that are essential to
achieve the required service life duration.
