Narada Power Source Co., Ltd. REXC operation manual V1.2
12
decreases from 25
℃
to 0
℃
; And too low temperature will cause battery long term
insufficient charged, also will make negative plates sulfate and make battery unable to
discharge.
The capacity will increase at some range when temperature rises. For example the
capacity will increase 5% if temperature raises from 25
℃
to 35
℃
. But when the
temperature go up further, the capacity will increase slowly, and at last stop increasing.
However, high temperature will quicken up plates’ corrosion and cause water loss, thus
shortens battery’s life.
Fig.3-1 Available Capacity Curve VS. Ambient Temperature
3.1
Temperature and Floating Voltage, Equalization Voltage
The purpose to select certain floating voltage is make the battery operate in best
conditions. If the floating voltage is higher, the floating current is also higher; it will
accelerate the corruption of grids and shorten the life of the battery. If the floating
voltage is lower, the battery can’t be kept in fully charged state, this will crystallize
PbSO
4
, decrease the capacity, and also shorten the life of the battery. At 25
℃
, the
floating voltage is 2.25V, at other temperature, please adjust according to Table 3-4.
The temperature compensation coefficient for float charge is -3mV/
℃
/cell. Valve
regulated sealed lead acid battery need to be equalized charge regularly, in order to
guarantees the battery normal operation. REXC battery’s equalization voltage is
2.30V/cell.
C
apa
cit
y %
Ambient Temperature
（℃）
