EnerSys PowerSafe OPzS, Руководство пользователя

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7
Details of charge at constant current (see appendix)
The current is constant troughout the charging period.
The voltage of the battery rises during the charging period, reaching a maximum value when the charge is complete.
This value depends on:
- The charging current
- Temperature: voltage must be corrected by +0.005 Volt per degree above 20°C
and -0.005 Volt per degree below 20°C
Example:
Read voltage at 27°C = 2.73 Volts
Corrected voltage at 20°C = 2.73 + (7 x 0.005) = 2.765 Volts
What happens at the end of charge?
- The temperature may rise quickly and excessive gassing maybe produced (which homogenises the electrolyte).
- V ariation of the voltage at the end of charge of a cell according to temperature and charging rate.
Charging rate
C
10
capacity
0.05
C
10
or C
10
/20
0.033
C
10
or C
10
/30
0.022
C
10
or C
10
/45
0.017
C
10
or C
10
/60
2.75V
2.70V
2.67V
2.64V
2.70V
2.65V
2.62V
2.59V
2.65V
2.60V
2.57V
2.54V
2.60V
2.55V
2.52V
2.49V
Minimum voltage in volts per cell for
15°C 25°C 35°C 45°C
Time to equalise the specific gravity
Example:
If the room temperature is about 20°C and the initial charge is carried out at 2.35V, it will take 13 to 30 hours to fully
charge the cell.
The table above applies if the specific gravity variance after filling and the rest period is below 0.010.
If the variance is higher than 0.010, the recharge at constant voltage will take longer.
In such case, it is better to recharge the battery at constant current.
Between 4 and 10 days
Room temperature
20°C 35°C
Charge voltage per cell
2.25V 2.35V
2.25V
2.35V
Between 13 and 30 hours Between 8 and 18 hours
Between 3 and 7 days
The minimum voltage at end of charge should be as follows:
2.45
2.50
2.55
2.60
2.65
2.70
2.75
2.80
0 0.005 0.01 0.015 0.02 0.025 0.03 0.035 0.04 0.045 0.05 0.055
V
oltage (Vpc)
Charging rate C10
End of charge : Voltage vs charging rate and temperature
15°C
25°C
35°C
45°C