FIAMM SoNick I&O - 48TL160H rev.0
– July 2013
pag.14
4 BATTERY IN OPERATION
4.1 Battery Warm-Up
The Fiamm SoNick 48TL160H battery needs to be warm before it starts to deliver energy since it
operates between 265° and 350°C (509-662°F).
The BMS performs the warm-up process automatically as soon as it is powered (by the power
switch or by the external 48V EPO Emergency Power Off circuit). When the battery is in this state
the led indication is both green and blue leds blinking while the 7 Segment display of the battery
continuously indicates the internal temperature.
Starting from room temperature, this process takes 13 hours. A graph of the process is included in
the appendix I section. Power consumption during this process is indicated in the table H.
Elapsed Time (h)
Temperature (°C)
Power consumption (W)
0
25
330
7
160
330
13
260
330
>14
265
50
Table H
4.2 Battery Charging
The BMS of the 48TL160H battery is equipped with an integrated charge regulator, basically a
DCDC step-down (Buck) converter. The battery accepts any voltage between 53 and 59V, and
regulates the charging current and the charging voltage to the optimal levels. Recharge current is
limited by the BMS to 32A therefore there is no need to limit the current at the rectifier level. To
charge the battery, a simple DC power supply can be used. In any case the BMS is fully
compatible with any typical rectifier used in the market.
If the BMS detects that the SOC of the battery is below 100%, the charge phase is automatically
started. This is indicated by the blue LED which will turn solid on while the display of the battery
alternatively shows all the charging parameters (voltages, current)
Battery recharge time depends on the current availability and the initial SOC. If the full current is
available, a complete charge takes approximately 12hrs. More charging information is included in
the appendix II section.
If the available current is below 32A, during the first part of the charge process, the DC
Bus voltage could decrease below the minimum value. A warning could be issued by the
BMS . Besides the factory setting of 32A, lower current setting are available on request.
4.3 Floating
When a fully charged battery is connected to the DC bus (with only green led solid on) the internal
charge re
gulators are switched off. In this condition the Battery “float” current has 2
main
“components”.
The first one is due to the power consumption of the electronics controller and the second is due to
the power consumption used to compensate for the heat losses.
The first component of the float current is constant over the battery status while the second
depends on battery working conditions. (i.e. ambient temperature).
The average float power consumption at 20°C is 50W, more detailed information is available in the
appendix III section of this manual.
