LITHIUM ION BATTERY FREQUENTLY ASKED QUESTIONES IV:
Q68: What is a drop test?
Drop the battery or battery pack three times from 1m high to the concrete (or cement) floor to get random impact.
Q69: What is a vibration experiment?
The vibration test method of ni-mh battery is as follows:
After the battery is discharged from 0.2c to 1.0v, it will be charged for 16 hours with 0.1c, and vibrate under the following conditions after being suspended for 24 hours:
Amplitude: 0.8 mm
Make the battery vibrate between 10hz-55hz, increasing or decreasing with the vibration rate of 1HZ per minute.
Battery voltage change should be between + / - 0.02 V, within + / - 5 m Ω resistance change. (vibration time in 90min)
The vibration test method of lithium battery is as follows:
After the battery is discharged at 0.2c to 3.0v, 1C is charged at 4.2v with constant current and constant pressure, and the cut-off current is 10mA. After 24 hours, the battery will vibrate according to the following conditions:
The vibration experiment was conducted with the vibration frequency ranging from 10 Hz to 60 Hz to 10 Hz in 5 minutes, and the amplitude was 0.06 inches. The battery vibrates on three axes for half an hour.
Battery voltage change should be between + / - 0.02 V, within + / - 5 m Ω resistance change.
What is a crash test?
When the battery is fully charged, place a hard rod across the battery. Drop a 20-pound weight from a certain height and hit the hard rod. The battery should not explode or catch fire.
Q70: What is a penetration test?
When the battery is fully charged, use a nail of a certain diameter through the center of the battery and leave the nail in the battery. The battery should not explode or catch fire.
Q71: What is the fire test?
A fully charged battery is burned on a heating device with a special protective cover, which is free of debris.