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FES BATTERY PACK GEN2 14S, Version 1.23
3. Plug in charger to outlet (220V AC, 50-60hz).
4. Turn on BMS switch on top of the Battery pack cover.
Immediately after BMS is switched ON, the BMS starts test procedure - with check of
all 14 cells, one by one. Red »Error LED« turns ON during system's test procedure
and switch OFF again when test is completed without error.
After test procedure, certain number of LEDs turns ON for about 1 second.
Number of cells which turned ON represents battery pack state of charge - SOC.
Each LED which turns ON represent about 7% SOC:
-if 1-2 turn ON, this means than battery pack state of charge is approximately 14%.
-if 1-7 turn ON, this means than battery pack state of charge is approximately 50%.
-if 1-14 turn ON, this means than battery pack state of charge is approximately 100%
5. When test procedure is completed also a green »Power LED« starts blinking, which
is clear sign that BMS starts working in normal mode. At the same time, BMS sends
signal to the charger to start charging. Orange LED on front panel of the charger
starts burning, which indicates charging. It is also possible to hear contactor "click"
inside of the charger. Charging current rises slowly to the final value of 9 A (or 18A
at 1200W, 35A at 2000W version), and after some time, cooling fans in charger starts.
6. In normal mode green »BMS Power« LED of BMS is starting flashing. This means that
the BMS is turned ON, but not necessary balancing. Balancing starts when one cell
reaches pre-set value, usually 4,1V (could be changed by BMS Control Software). If
any of 14 green LED cell balancing indicators is ON, it means that this cell has slightly
higher voltage compared to the lowest one.
1. If one or just a few cells have higher voltage levels that the others, BMS will
discharge them, the BMS temperature rise will be minimal.
2. In case that one cell has lower voltage level than the others, all higher cells will
need to be discharged so that at the end all of them will be balanced. This leads to
higher BMS temperature rise, even if voltage difference is only 0.010 V (10mV).
The cooling ventilators start working if an upper BMS cooling plate of
battery pack reaches 50 °C
Caution: Sometimes in hot conditions, temperature of the BMS cooling plate
could still rise despite of working ventilators. In such case when the
temperature of cooling plate would reach 55 °C, the charger would be
switched off automatically. When the temperature drops down to 45 °C, the
charger would start charging again.
7. Red »Error LED« is ON only during the initial test procedure. After the test is finished
it turns OFF. Some system errors are also indicated with red »Error LED« by the
number of ON blinks, followed by a longer OFF state. Number of blinks identifies the
error.
Page 11 of 26
September 2019
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