Constant-Current Charging/ Discharging Of Battery - Kenwood PDS-20 Instruction Manual

CONSTANT-CURRENT CHARGING/
DISCHARGING OF BATTERY
Constant-current charging
Output switch
+
| S
Power tnt g
supply | = | ra
Notes:
(1) Be sure to equalize the polarity of the supply power and
battery.
(2) Current would flow back into the power source if the sup-
ply voltage is lower than the battery voltage, the OUTPUT
switch is off, or power supply is turned off. In this case
reconnect diode D, in the forward direction.
20
Constant-current discharging
Connect load resistor R as shown Fig. 16. We assume the bat-
tery terminal voltage as E and discharging current as I.
i~
°
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9
Q
a
a
oO
P=Fx R[W]
Fig. 16
1) Keeping the V/I CHECK switch depressed, set the output
voltage at a few volts higher than the battery voltage with
the constant-voltage control and the discharging current
with the constant-current control.
2) Be sure to connect a load resistor of discharging. (Direct
connection of battery or capacitor may cause damage to
this unit)
3) Close switch S,, and constant-current discharging starts
and continues until the final voltage is reached.
Notes:
(1) Use switch S, to turn on and off discharging. (If the OUT-
PUT switch or power switch is off, current flows in this
unit through the protecting diode connected in parallel
with the output terminals.)
(2) Be careful about the power consumption of the load
resistor of discharging.
(3) Connect the blocking diode to protect the battery.