SDS

5.2 test equipment requirements
5.2.1 precision measuring instrument for size should be greater than or equal to 0.01 mm.
5.2.2 multimeter to measure the accuracy of voltage and current shall be not less than 0.5 on the Richter scale, measure
the voltage when the internal resistance should not be less than 10 k Ω/V.
5.2.3 requires internal resistance tester measuring principle should be 1 KHZ (LCR) ac impedance method.
5.2.4 battery testing system of current accuracy should be + / - 0.1%, constant pressure plus or minus 0.5% accuracy,
timing accuracy is not lower than + / - 0.1%.
5.2.5 instrument of temperature measurement accuracy should be not less than plus or minus 0.5 ℃.
5.3 standard charge
Test conditions and steps:
0.5 C5A = 525 ma
Under the condition of the ambient temperature of 25 + 2 ℃ C5A constant-current charging current at 0.5 to 0.5 V, and
then turn to constant voltage charging, until the charging current is less than or equal to 30 ma, total charging time not
more than 2.5 hours, stop charging.
5.4 on time
If no special request, the battery charge and discharge interval for 30 min.
5.5 the initial performance test
project
The test method
request
(1)open circuit
voltage
Within 24 hours after standard charge, measuring the
battery open circuit voltage
≥4.10V
(2) AC internal
resistance
Standard charge, 25 + 2 ℃ communication method is used
to 1 KHZ (LCR) internal resistance measurement
≤ 150mΩ
(3) 0.5 C capacity
test
After standard charge, put aside 30 min to 0.5 C5A (525 ma)
discharge to 3.000 V, test battery capacity
Discharge capacity ≥
1000mAh
5.6 e-test
5.6.1 discharge temperature characteristic
Battery in 25 + 2 ℃ standard charge, and then cooling or heating in 30 minutes to test temperature.Prior to discharge the
battery at this temperature for 2 hours, constant exile electric to cut-off voltage of 3.000 V, 0.2 C5A discharge current, after
doing an experiment temperature, battery placed 2 h at room temperature and then to charge (25 + 2 ℃), the requirement
is as follows:
Discharge temperature
-20℃
25℃
60℃
Discharge capacity
70%
100%
80%
5.6.2 cycle performance
5.6.2.1 standard charge, put aside 30 min, 0.5 to 3.000 V C5A discharge, suspended 30 min, repeat the above steps for
circulation, until the battery discharge capacity 3 consecutive 80% or less 3 weeks discharge capacity, to test the
temperature of 25 + 2 ℃ (important parameters affecting cell cycle performance), requirements are as follows:
Cycling times ≥300