DPI Xcel 7QP-12F950P25-C01 Посібник - Сторінка 10
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Друкувати сторінку7. CHARGING A RECHARGEABLE BATTERY
Each set of Yellow and Green LEDs on the front of the charger are used to
indicate the charge status state for the channel associated with the set of LEDs.
Yellow LED Flashing
Yellow LED Solid
Green LED Solid
Yellow/Green LEDs flash alternately – Charge failure on that channel
Multi-Stage Charge Algorithms
There are up to 8 charging Stages! Depending on the MODE selected, these
stages are already preset and implementation of each stage will vary from one
CHARGE MODE setting to the next, dependent on the type of battery intended to
be charged. These charge stages 'typically' include:
PRE-QUALIFICATION-TEST Charge Stage:
Tests Lead Acid battery for sulphation by applying a low-level charge current
and analyzes voltage and current values and rates of change to determine if
the battery is ready to transition to the next high-power Bulk Charge Stage.
For Lithium cells, this stage is extremely brief and may not be annunciated. It
checks for minimum and maximum cell voltages. If a fully charged cell is
detected, a transition to 'Charge Complete' is done, bypassing all other
charge stages.
BULK Charge Stage (also known as 'Constant-Current'):
High Power charge, charges at a constant current or constant power rate to
deliver the 'bulk' of the charge needed
Upon completion of this stage, approximately 80% of total charge is delivered
to the battery
ABSORPTION Charge Stage (also known as 'Constant-Voltage'):
Charge voltage is held at a constant level to optimize the amount of energy
the battery absorbs.
Charge Amperage decreases as the energy is being absorbed.
Termination of this stage occurs when the charge current decreases to a
preset value. Duration of this stage is dependent on many factors such as
size, type, age, and chemistry of battery.
Upon completion of this stage, approximately 95% to 100% of total charge is
delivered to the battery.
TOP-OFF Charge Stage (also known as 'Finish'):
Charger charges at either a constant voltage, or constant current, or a
combination of constant-current / constant voltage to 'Top-Off' the charge in
a battery.
This stage employs timing based on 'timers' measured and recorded during
previous charge stages, in combination with dv/dt and/or di/dt.
– Battery testing in progress
– Continuous charging
– Battery charged
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