Someone asked on the Internet: "The lithium battery inside the mobile phone, after opening the back shell, found a liquid leakage, the battery surface is soft, what is the reason?" The following answers are from lithium practitioners.
Leakage, the main reasons are 1. Internal pressure is too large; 2. The external package is unqualified.
First, in the process of battery manufacturing, if the following problems occur, it is easy to cause battery leakage:
1. When welding battery shell and cap, the welding is not firm, not sealed, welding leakage, virtual welding, welding seam cracks, cracks and other problems;
2. The steel ball sealing, the size of the steel ball is not appropriate, l steel ball material and cap material is not the same;
3. The positive riveting of the cap is not close, there is a gap, and the elasticity of the insulation sealing pad is not suitable, and it is not corrosion resistant and easy to aging.
Two, in the process of use may occur problems:
1. The battery is not original, and the voltage or current is too high;
2. The battery often knocks against in the ordinary use process, damages the aluminum plastic film, and the internal strength of the battery is not enough;
3. Overcharge caused by abnormal charging or discharge with high current ratio (damage of battery protection system with high current)
