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3.
Charging Features and Electrical Parameters
This product provides a 4-stage charging mode: pre-charge, constant current, constant voltage, and float charge, and
the features are as follows:
i)
Pre-charge
: identify the battery voltage before charging; if the battery voltage is lower than the reference
voltage, the battery will be pre-charged in order to avoid damage to the battery.
ii)
Constant current
: the main charging phase; the battery will be charged with the maximum current, 70%~85%
of the electricity is charged in this stage
iii)
Constant voltage
: in the process of constant voltage charging, the battery voltage will be higher and higher,
and the current will be smaller and smaller; when the charging current drops to 0.5C, the constant voltage
charging ends, and then enters next stage; the constant voltage charging stage is the boost charge, and the
battery is almost fully charged at the end of the stage;
iv)
Float charge
: it is a maintenance charge, and allows for a longer time of safe charge. Through trickle charge,
the battery can be charged to nearly 100%. Too small current is insufficient to cover the self-discharge of the
battery, and too large current will lead to over-charge and dehydration. Long time charging with a small
current can eliminate the vulcanization of the negative electrode plate.
Fig. 3: Current & Voltage Charging Curves
1) Power-down memory function
: in the charging process (constant current and follow-up stage), the product can
remember the current charging mode after power outage, and restores the original state when the grid resumes; the
maximum time is 12h with battery connection.
In power-down memory state, the Power LED is on, the LCD doesn’t display, and the backlight is off;
