Battery Charge Time Calculation - GRAUPNER ULTRAMAT AC/DC EQ Operating Instructions Manual

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OUTPUT
CIRCUIT
PROBLEM
CHECK THE BATT..
OPEN CIRCUIT
CHECK THE BATT..
OVER VOLTAGE
CHECK THE BATT..
LOW VOLTAGE
BALANCER VOLTAGE
IS TOO HIGH
BALANCER VOLTAGE
IS TOO LOW
DONT CHARGE Lixx
WITH THIS MODE
OPEN BALANCER
PORT

◎ BATTERY CHARGE TIME CALCULATION

If you know the battery capacity, you may estimate charge time approximately
Charge time (minute) = [ Capacity (Ah) / Charge current (A) ] x 60
Ex) If 7.2V 2000mAh NiCd battery is charged with 3.0V, charge time is (2.0/3.0)x60, approx
40 minutes It is just for your reference, not the correct time
◎ NEW BATTERY CHARGE
When the new NiCd/ NiMH are charged at the first time, charge process might be termi-
nated within minutes, it is not because charger or battery have a problem, but because
battery is not stabilized yet. In this case, you need to charge battery after increasing the
delta peak value or to charge battery after discharging and cooling down battery.
Do not use the battery, if the charged capacity of battery exceeds battery capacity in
specification. If such a phenomenon arises, repeat to charge and discharge more over 5
times and charge again. Such a phenomenon might arise till the third time charge.
When the circuit of the charger has a problem
When a battery is disconnected during an operation
When wrong voltage is set while charging lithium or
Pb battery
When wrong voltage is set, or battery is over dis-
charged, while charging Lithium or Pb battery.
When voltage per cell is too high during balancing
When battery cell voltage is low or battery cells are
short-circuited during balancing
When the charger starts charging, discharging, or
cycle for NiCd/MH, or Pb battery with connecting the
balancing cable to the balancing port of the charger
When balancer port is removed during balancing
ULTRAMAT AC/DC EQ
17

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