Narada Power Source Co., Ltd. 12REXC operation manual V1.0
10
0.05C
10
≤I
＜
0.1C
10
1.87
44.9
0.1C
10
≤I
＜
0.2C
10
1.83
43.92
0.2C
10
≤I
＜
0.5C
10
1.75
42.0
If the battery is not recharged in time after discharge, or the power is off again during
recharge, the insufficient-charged batteries will be frequently discharge, thus the
batteries will lose part of capacity in short period. And it may cause capacity loss at
initial stage and the batteries will be rejected if the situation is serious.
2. Capacity and Influence Factor
The capacity of battery is the capacity that battery can be discharged in the established
conditions, expressed as signal C. The usual unit of capacity is ampere-hour, shortened
as AH. The rated time is marked in the right and low corner of C, i.e. C
10
is the
capacity at 10 hours rate; C
3
is the capacity at 3 hours rate.
The capacity can be expressed in Rated Capacity or Actual Capacity. For Rated
Capacity of 12REXC, please see Table 1-1. The Actual Capacity is the actual output
capacity in certain discharge conditions, which is equal to product of the discharge
current and the discharge time, the unit is AH. The actual capacity is effected by
discharge rate, discharge mode, end voltage and temperature.
3. Ambient Temperature vs. Battery
The recommendation temperature for 12REXC is 15
℃
~ 25
℃
. Used at high or low
temperature, battery performance will be affected. Table 3-3 is the working
temperature range for battery.
Table 3-3 Working temperature range for battery
Working condition
Temperature range
Recommended temperature
Discharge
-40
℃
～
50
℃
15
℃
～
25
℃
Charge
-20
℃
～
50
℃
15
℃
～
25
℃
Storage
-20
℃
～
40
℃
15
℃
～
25
℃
Temperature affects capacity of the battery. Fig. 3-1 is the available capacity (10h rated,
end voltage 1.80Vpc) curve vs. ambient temperature. When the temperature is low, the
capacity will decrease, for example, the capacity will decrease 10% if temperature
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
