Operation manual V 3.2 for AcmeG series
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3.3
Equalization Charge
VRLA battery needs Equalization Charge regularly to ensure the battery
operating under 25º
C working condition. The equalization voltage of Narada AcmeG
series battery is 14.4V/block. The temperature compensation is at -30mV/º
C/block.
Equalization voltage under different temperature is calculated by the following
formula:
V
T
=14.4-(T-25)
×
0.005
×
6
V
T
—equalization voltage under T temperature
Table 3-3 Equalization Voltage under Different Temperature
Ambient
temperature(
℃
)
Equalization voltage
(V/cell)
Equalization voltage
(V/block)
≤5
2.45
14.7
10
2.425
14.55
15
2.40
14.4
20
2.375
14.25
25
2.35
13.95
30
2.325
14.25
35
2.30
14.10
≥40
2.275
13.65
Note: If ambient temperature below 5
℃
or above 40
℃
, temperature compensate is
no longer go on.
3.4
Ambient Temperature and Life
High temperature is harmful to the battery and affects its service life. When the
ambient temperature exceeds 25º
C
，
the service life reduces by half for every 10º
C
increment in temperature. For example, the battery service life is 10 years under 25º
C
but if the operating temperature is 35º
C, the service life will become 5 years. The
formula to calculate the service life is as follows:
t
25
＝
t
T
×
2
（
T
－
25
）
/10
whereby T : actual ambient temperature
t
T :
design life under T
t
25:
design life under 25º
C
As such the ambient temperature should always be controlled.
