MAINTENANCE
Read all of SAFETY and this section before attempting any procedure. Pay particular attention to Notices, Cautions, Warnings and Dangers.
the second stage when single cell voltage reaches 2.40-2.45V
The second stage (S2), constant voltage charging, with a single cell voltage of 2.40-2.45V constant voltage charging, when the
charging current drops to 0.012- 0.02C, the charger will automatically turn to the third stage, at this time the charger should turn
the light (usually turn green, means fully charged).
The third stage (S3), float charging, float charging with single cell voltage 2.28- 2.32V, float charging 2-4hrs can end the charging,
at this time the charger should be turned off.
◆
Charging Time Recommendation:
1)
Charge above 25°C for about 12hrs. If surface temperature of the battery reach 45°C, stop charging until the temperature drop
below 30°C and charging can be continued, otherwise, the battery will be damaged.
2)
Charging below 25°C, the battery is stored indoors for 1hr and then charged for about 16hrs.
The charger should have charging temperature compensation function, with 25°C as the base point, for every 1°C increase in
ambient temperature, the charging voltage will be adjusted down by 4mV/cell. For 1°C decrease in ambient temperature, the charging
voltage will be adjusted up by 4mV/cell.
Fig. 1: Three-stage charging curve
Notice：
In different voltage systems, the current does not change, but voltage should change. For example, when charging at constant
voltage, in 48V system, the voltage is 57.6-58.8V at constant voltage charging, and in 24V system, the voltage is 28.8-29.4V. In
48V system, when floating charge, the voltage is 54.7- 55.6V, in 24V system, the voltage is 27.4-27.8V.
4.2 Five Stage Charging
The first stage (S1), charging at constant current of 0.18-0.2C, automatically switches to the second stage when single cell
voltage reach 2.40V.
The second stage (S2), charging at constant current of 0.10-0.12C, automatically switches to the third stage when single cell voltage
reach 2.47V.
The third stage (S3), charging at constant voltage of 2.47V with current limit of 0.05C, and automatically switch to the fourth stage
when charging current drop to 0.01C.
The fourth stage (S4), charging at 0.01C constant current, when the voltage of single cell reach 2.50V, it automatically switches to
the fifth stage, at which point the charger should turn the light (usually turns green, which means it is fully charged).
The fifth stage (S5), single cell voltage 2.3V floating charge, floating charge 2- 4hrs can end the charge, at this time the charger
should be turn off.
◆Charging Time Recommendation:
The charging time under the five stage charging curve is for reference, but the charging time of the five stage charging method
shall not be less than 12hrs.
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