Judgment Of Complete Charging - ISDT Q6 Pro Operating Instructions Manual

Task Setting
Since the way of internal resistance measurement varies, it cannot be realized to
measure the absolute value as professional internal resistance tester does. Therefore,
the internal resistance value can only be referred to when conducting horizontal
comparisons, such as judging the consistency of the cells' performance or making
comparisons of the performance of different cells. The charging current is an influen-
tial factor for measuring internal resistance; batteries with large capacity and small
internal resistance would relatively need large charging currents to accurately

Judgment of complete charging

During the charging process, the screen displays an orange marking which turns into
green or blue as the charging is completed. When the charging completes, the cells'
voltage difference should be smaller than 20mV, while the screen marking turns into
green. Therefore, if the battery is in urgent use, it's okay to stop charging. The charger
should continue to balance the battery if the charging process is not terminated, and
the screen light turns blue, since the voltage difference is smaller than 10mV. Addition-
ally, the charger should continue to carry out accurate balancing of the battery after
the light turns blue. If the consistency of the cells is excellent, the screen light should
skip color green to become blue as the charging is complete.
After the charging is complete, it is normal for voltage decline to occur due to different
performances. As the number of the charge cycle grows, the performance decreases,
and the voltage decline phenomenon becomes obvious. To charge the battery with a
larger current would also cause a more obvious voltage decline after the charging is
complete.
NB: When charging the battery in a hurry in outdoors, it is okay to stop charging when
the screen light turns green. If there is enough time and the cells are assumed to be
11