Model 2281S-20-6 DC Power Supply and Battery Simulator Reference Manual
Section 3: Functions and features
077114601 / March 2019
3-59
Battery charging test
Before the test, set the charging voltage V
set
and the maximum current I-limit.
As shown in the following figure, the charging is divided into two parts.
Figure 99: Charging phases
Constant current phase:
In the initial stage, the instrument charges the battery with I-limit, and
the output voltage is smaller than V
set
but increasing.
Constant voltage phase:
When the charging voltage reaches the V
set
value, the instrument
charges the battery in constant voltage while the charging current is decreasing gradually.
When the charging current falls to near 0 A, the charging is finished. At this time, the battery open
voltage equals V
set
.
To charge a battery using the front panel:
1. Select the battery test function in the startup screen.
2. Press the
MENU
key.
3. Under
Measure
, select
A-H
.
4. Set the target voltage next to
V-Full
. If the battery works in the range of 3.8 V to 4.2 V, set this
value slightly higher than 4.2 V.
5. Set the maximum charging limit next to
Source I-Limit.
