Narada Power Source CO., LTD TT Series Battery Operation Manual
Table 3-1 Discharge End-voltage
Discharge Current
（
A
）
Discharge
End
Voltage
（
V/Cell
）
I
＜
0.2C
1.80
0.2C
≤
I
＜
0.5C
1.70
0.5C
≤
I
＜
1.0C
1.55
I
≥
1.0C
1.30
3. Temperature
3.1.
Available Capacity Vs. Ambient Temperature
Temperature affects capacity of the battery. Fig. 3-1 is the available capacity curve vs.
ambient temperature. if the temperature drops, the capacity will decrease, for example, the
capacity will decrease to 80% of rated capacity if temperature decreases from 25
℃
to 0
℃
; and
too low temperature will cause battery long term insufficient charged, also will cause no
discharge and negative plates sulfate.
Though VRLA battery can be operated at -15
℃
, the standard data is the test result at 25
℃
.
The capacity will increase when temperature raises. For example the capacity will increase
to 102% of rated capacity if temperature increase from 25
℃
to 50
℃
. But it will quicken plates’
corrosion and water loss if temperature raises, and shorten battery’s life.
-40
-30
-20
-10
0
10
20
30
40
50
60
0.0
0.2
0.4
0.6
0.8
1.0
1.2
Ambient Tempersture(
℃
)
el
ectric
Cap
acity(
%
)
Fig.3-1 Available Capacity VS. Ambient Temperature
13
