Battery Cycle Life Testing Laboratory: Explaining the Requirements for Cycle Life Testing

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Cycle life test

Partial certification program	Battery cycle life test requirements
UN38.3 certification	Before the battery is tested for life, it should be discharged to the termination voltage with a current of 0.2C5A and charged at a constant current of 1C5A. At (20 ± 5) °C ambient temperature, when the battery terminal voltage reaches the charge limit voltage, change to constant voltage charge until the charge current is less than or equal to 0.05 C5A, stop charging, set aside for 20 minutes, discharge to 1C5A A current to terminate The voltage is allowed to stand for 20 minutes, and then the next charge and discharge cycle is performed until the two consecutive discharge times are less than 42 minutes, and the end of life is considered to be terminated. Result: The cycle life should be no less than 300 times, and no leakage should be observed during the test.
CQC certification	At the ambient temperature of 23 °C ± 2 °C, after the end of the charging according to the manufacturer's specifications, leave 0.5h ~ 1h, discharge with 1.0Iout current to cut off, leave 0.5h ~ 1h, and then continue the next charge and discharge cycle until continuous If the three effective output capacities are less than 60% of its rated capacity, the end of life is considered to be terminated (the three consecutive non-standard effective output capacities are not recorded in the total number of capacity cycles). Result: The cycle life should be no less than 300 times, and no leakage should be observed during the test.

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