8
Battery Management System (BMS):
Lithium Battery Discharge Characteristics:
When talking about lithium batteries it is useful to understand the difference between the
peak and nominal voltage of the pack. The peak voltage is the voltage of the battery when
fully charged, whilst the nominal voltage is the avegage operating voltage of the battery.
Ebike batteries are collections of
smaller cells linked together to
provide a certain voltage and
capacity. The battery
management system (BMS) sits
between the cells and the
“outside world” and helps to stop
the cells from being damaged. It
typically includes protection
against over-charging (if the
voltage is too high), over-
discharging (if the cell voltage is
too low), over-current (if the current is too high during charge or discharge) and short
circuits. It often can help prevent discharge if the temperature is too high or low, and
can also help balance the cells to ensure they all stay at the roughly the same voltage
during charging.
