Battery Discharging Test - Tektronix Keithley 2281 Series Reference Manual

Model 2281S-20-6 DC Power Supply and Battery Simulator Reference Manual

Battery discharging test

As shown in the following figure, discharging is divided into two parts.
Constant current phase: In the initial stage, the instrument discharges the battery in constant
current mode. The absorbed current cannot be set, but it is usually the maximum current that can
be absorbed, which is approximately 1 A (influenced by the ambient temperature). The output
voltage is larger than V
Constant voltage phase: When the discharging voltage falls to V
the battery in constant voltage mode while the discharging current is decreasing gradually.
If the maximum output current of the battery under test is less than 1 A, you should connect a
resistor between the instrument and the battery to prevent the battery from switching into
protection mode or being damaged.
When the discharging current falls to near 0, discharging is finished. At this time, the battery open
voltage equals V
077114601 / March 2019
Figure 98: Discharging phases
but decreasing.
set
.
set
Section 3: Functions and features
, the instrument discharges
set
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