Narada Power Source Co., Ltd. 12REXC operation manual V1.0
8
Fig.2-1 Discharge characteristic curve
2. Charge Curve
Fig.2-2 Recharge characteristics of 12REXC battery with current of 0.1C
10
A and limit
voltage of 2.30V/cell (25
℃
). The 100% DOD battery can be recharged 105% of
capacity after charging for 24 hours. Imaginary line is the recharge curve of 50%DOD.
Charge curve 25
(
℃
)
14.1
13.5
12.9
12.3
100% discharge
50% discharge
0
24
4
16
12
20
8
C
ha
rg
e
ca
pa
ci
ty
(%
)
C
ha
rg
e
cu
rr
en
t(C
A)
C
ha
rg
e
vo
lta
ge
(V
)
Charge current
Charge capacity
Charge voltage
Time ( h )
Fig.2-2 Charge characteristic curve
3. Internal Resistance and Short-Circuit Current
The internal resistance of the battery is a dynamic nonlinear parameter that is
continuously changed along with the temperature and discharge state. The internal
resistance is the lowest when battery is fully charged. The table 2-3 shows the internal
resistance and short circuit current of 12REXC battery in fully charged state according
to the IEC60896 standard. Pay attention to the battery to short-circuit causes the
battery voltage to reduce to 0V, and will cause the battery internal component
damaged.
Table 2-3 Referenced Internal Resistance and Short Current
Battery Type
Internal Resistance
(mΩ)
Short Current (A)
12REXC70
9.79
1291
12REXC200
3.83
3274
6REXC300
1.35
4619
Chapter Three Operation and Maintenance
1. Parameters Setup
