Kikusui PFX2515, Руководство по эксплуатации, Страница: 93 / 104

PFX2512_CE
93
App.
C
Connecting a Bias Power Supply
p. 18
The discharge minimum operating voltage of this charge/discharge system is approximately 1.5 V
(The discharge minimum operating voltage relies on the minimum operating voltage of the
Electronic load). If you want to perform discharge tests with a voltage lower than this value,
connect a bias power supply.
This is useful when you want to evaluate a low voltage range, when you want to perform a charge/
discharge test on a single cell, or in similar situations.
For the bias power supply, you can use variable-voltage power supplies such as the Kikusui PAS
series, PWR series, and PAG series or fixed-voltage power supplies.
By connecting a bias power supply of approximately 5 V between the PFX2512 and the electronic
load, the voltage becomes “DUT v bias power supply voltage,” which is a voltage within the
operating area where specifications are guaranteed.
The current capacity of the PFX2512 is 50 A, so when you connect a 5 V bias power supply,
configure the settings so that the power capacity is at least 5 V × 50 A = 250 W.
Regarding the power distribution of the PLZ series, the part for the bias power supply is consumed,
so if you want to use the PLZ1004W and a 250 W bias power supply, the power range that can be
used for DUT (battery) discharge is 1000 W - 250 W = 750 W.
Wires and tools required for connection
See
CAUTION
• Set the bias power supply so that it is always on (its output is on) when the charge/discharge
system is on. If the discharge is started with the bias power supply off, the bias power supply may
be damaged.
• Pay attention to the bias power supply settings and the permitted capacity (the current rating) to
ensure that the bias power supply does not operate in constant current mode (current limit)
during discharging. If the bias power supply enters constant current mode (current limit) during
discharging, an alarm will occur.
• When a bias power supply is connected, the electronic load's panel displays a voltage of
approximately 4 V even when the system is at rest, but this is not a malfunction.
Bias power supply Output voltage: 5 V constant voltage operation
Output current: greater than the discharge current
Wires Cable to connect the PLZ-4W series and the bias power supply
14 mm
2
(AWG6) or more, 50 cm or less in length
See the table “Nominal cross-sectional area of cables and allowable currents
(reference)” on
p. 45 .
DUT cable included
with the PFX2512 Cable to connect the PLZ-4W series
and the bias power supply
DUT cable included
with the PFX2512
PFX2512
PLZ-4W
Bias power supply
Bias power supply connection example
(PFX2512, PLZ-4W series, and bias power supply)
+
S
+
+
+
–
–
–
–
S
+
T
–
T
* We recommend
that you make this
cable 50 cm or less
in length to
minimize voltage
drops in the cable.