The experimental method of lithium battery vibration is:
Discharge the battery to 3.0V with the discharge rate at 0.2C and then charge to 4.2V with charging rate at 1C and constant current and constant voltage. The experiment requires that the cut-off current is 10mA. After 24 hours of shelving, it will be vibrated in following conditions:
2.Make the battery vibrate between 10HZ-55HZ, increasing or decreasing at a vibration rate of 1HZ per minute；
3.After vibration, the battery voltage change should be between ±0.02V, and the internal resistance change should be within 5m.
The lithium battery pack needs to be vibrated continuously and randomly for 21 hours under environmental conditions from -30℃ to 60℃, which can be equivalent to simulating hundreds of thousands of kilometers of driving fatigue.
The shaker is used to simulate the bumpy road conditions that the battery pack will encounter in actual use.
The environmental box is used to provide different temperature environments.
The charging and discharging motor is used to provide the actual working conditions of charging and discharging.
These three parts form a vibration test system with temperature and load, which truly simulates the situation when the real car is in use.
Purpose: Avoid the vibration of the battery caused by bumpy roads, which can cause poor fixation of battery products that are not of good quality. Loose parts and cracked housings can cause the battery to fail safely. For this reason, national standards require vibration testing of power batteries.