Temperature and Floating/Equalizing Charge Voltage
Choose suitable floating charge voltage for reaching perfect service life and Nominal capacity. If
floating charge voltage is too high, floating current will be high accordingly, that will speed up plate
corrosion and battery water loss, thus shortening battery service life. If floating charge voltage is
too low, battery can’t be kept in fully charged state, irreversible sulfation will be caused easily and
capacity will be reduced accordingly, thus shortening battery service life as well.
In a floating charge application, charge voltage should be adjusted according to the ambient
temperature, using temperature compensation coefficient -4.0mV/
℃
/cell. The same way is used to
adjust equalizing charge voltage.
After the temperature compensation, the floating charge voltage range is 2.20-2.28V, the
equalizing charge voltage range is 2.35-2.50V. When battery float/equalizing charge voltage
according to the temperature compensation coefficient calculated values over the range,
according to the corresponding upper limit or lower limit setting
Temperature Effect on Battery Design Life
Temperature range of the DCS series is -20
℃
~+75
℃
. The battery can be used in 15
℃
~40
℃
environment for a long time. Corrective measures should be taken in case the temperature
deviates from the optimum temperature range. If the room / cabinet temperature is too high, take
cooling, ventilation and other measures to improve the environment temperature. If it is too low,
take corrective measures for heating. At the same time and according to the manufacturer's
requirements, use temperature compensation for the floating/equalizing charge voltage.
Higher temperature will speed up the battery grid corrosion and water loss, thus greatly shorten
the battery life. The battery floating design life and temperature curve are shown in Figure 3-2.
Figure 3-2 DCS series temperature effect on battery design life curve
Operati
on
and
m
aintenanc
e
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