Onyx CTY2, Owner'S Manual

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OPERATING iNSTRUCTIONS
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BATTERY MANAGEMENT SYSTEM
The Onyx CTY2 battery management system which is contained inside the battery requires that the charger be
plugged in for it to balance individual cells even if the battery is fully charged. The Onyx CTY2 battery is comprised of
85 21700 batteries.
The Onyx BMS (battery management system) is programmed to maintain the individual batteries between 4.20 volts
charged to 3.00 volts depleted. Although individual 21700 batteries can be charged as high as 4.25 volts and as low
as
2.50 volts, it is healthier for the batteries in terms of charge cycles and safer to keep batteries between 4.20 volts
and 3.00 volts. During riding, the BMS monitors the voltage of the battery pack as a whole and that of the individual
battery groups. One of the functions of the BMS is to protect the batteries from undercharging. If the BMS detects
any individual cell(s) that have depleted closer to 3.00 volts (51 volts) before all the other batteries, it will cut off the
battery to protect the lower unbalanced depleted battery(s) from undercharging below 3.00 volts.
CTY2 MODEL