General Layout Of The Pack; Internal Bms - FES GEN2 14S User Manual

FES BATTERY PACK GEN2 Version 1.18

2.3 General layout of the pack:

Plus pole
RADSOK
terminal (fi
10.3mm)
DATA cable
connector,
with spring
locks
BMS ON-OFF
switch
Minus pole
RADSOK
terminal (fi
8,0mm)

2.4 Internal BMS

Your battery packs are equipped with internal BMS (battery management system)
electronic circuit. What is a BMS?
During charging and discharging LiPo battery cells differ in voltage levels, due to
slightly different capacity of cells. Cells with lower capacity charge and discharge faster
than cells with higher capacity. LiPo cells have nearly linear voltage to capacity
dependence. BMS controls the voltage of each cell in the battery pack. Cells which have
higher voltage than the others, are discharged through resistor inside of BMS – the energy
dissipates through heating of upper plate of pack which is milled from Aluminum. To
improve dissipation of the heat there are two small ventilators on top of the upper plate
which starts when upper plate reach preset temperature.
Balancing of each cell is indicated by green light emitting diode (LED).
Internal BMS in battery pack balance cells only in the presence of a
CHARGER and above pre-set balancing voltage.
Strap for carrying
Top view of FES GEN 2 battery pack
Page 6 of 25
Balancing LEDs 1-14
»ERROR« LED
September 2017
BMS cooling
plate
ventilators
»BMS POWER« LED