Shenzhen TestPad Electronic Co., Ltd.
http://www.test-pad.com
9
Connection Method
There are seven connection terminals on the tester. P+ and P- are respectively connected to the
anode and cathode of the battery to serve as the connection channel of the charge current and
recharge current. R+ and R- are also respectively connected to the anode and cathode of the
battery and are converged at the battery electrode to serve as the connection channel of
measurement signals. In this way, the four-wire measurement system can remove the measurement
error caused by the wires and improve the measurement accuracy.
Besides, R1 and R2 respectively serve as the connection terminals of identification resistors or
thermal resistors. If they are needed, use wires to connect them to the corresponding terminals; the
ID wire is used to measure some batteries with IDs. Currently, this function is optional.
The following example shows the test of a Li-ion battery with identification resistors. The
connection is shown below.
Multi-function Rechargeable Battery Test Center
In the above figure, five wires are needed. P+ and R+ are respectively connected to the anode of
the battery, and P- and R- are respectively connected to the cathode of the battery. In this way, the
tester can measure the impedance accurately. If accurate impedance measurement is not needed,
you can also directly connect P+ and R+ in parallel and connect P- and R- in parallel, and then
respectively connect them to the anode and cathode of the battery. In this case, the measured
impedance might be relatively high, while no other effects will be exerted. If identification
resistors or thermal resistors need be tested, you can use separate wires to connect R1/R2 ports to
the corresponding terminals on the battery.
Caution: Because of the over-current protection and short-circuit protection functions of the
battery, relatively high current is required, so relatively larger wires are required, thus to avoid
inaccurate measurement due to the impedance of the wires.
