In such method, it take about 24~36h for battery fully charged. For achieving better
performance, the floating charge voltage should be suitable adjusted according to ambient
temperature, temperature compensation coefficient is -3.5mV/
℃
/cell, for details please refer to
Table 3-1.
Table 3-1 Floating charge voltage under different temperature
Ambient Temperature (
℃
)
Floating Charge Voltage (V/cell)
0
2.35
10
2.31
15
2.29
20
2.27
25
2.25
30
2.23
35
2.21
Equalizing charge
Equalizing charge or supplementary charge is needed in the following cases:
After finish installation, before the battery system is put into operation, the battery bank
should be supplementary charged.
The battery is out of work beyond 6 months.
Running in full-floating operation for a long term, but not discharge under more than
40%C
10
capacity, the batteries need an equalizing charge regularly and the equalizing
charge cycle are 6 months to one year.
Recommended charge method as follows:
2.35V/cell with limited current of 0.15 C
10
(A), charge for 8~12 hours (non-continuous
charge is allowed)
Charge voltage shall be adjusted according to the ambient temperature, temperature
compensation coefficient is
±
3.5mV/cell/
℃
, for details please refer to table 3-2.
Table 3-2 Equalizing charge voltage under different temperature
Ambient Temperature (
℃
)
Equalizing Charge Voltage (V/cell)
0
2.45
10
2.43
15
2.39
20
2.37
25
2.35
30
2.33
35
2.31
Operation and
maintenance
16