Why do lithium batteries leak?

Someone on the Internet asks: "there is leakage of lithium battery in the phone after open the shell. The battery surface is soft. Why does this happen?" The following answer is from lithium electricity practitioners.

Leakage, the main reason is: 1. The internal stress;2. The outer packaging is unqualified.

If one, in the process of battery, the following problems, is easy to cause battery leakage:

1. When the welding battery shell and blocked shots, welding is not strong, no seal, missing welding, welding, welding cracks, cracks and other issues;

2. Sealed ball bearings, ball size not appropriate, l steel ball material and block material;

3. The positive riveting of the blocks is not close together, there are gaps, and the elasticity of the insulation gasket is not appropriate, not resistant to corrosion and aging.

Second, the possible problems in the process of using:

1. Battery not original, high voltage or current is too large;

2. The battery in normal use process often knock against, aluminum-plastic film damage, plus the battery internal strength is not enough;

3, charging abnormal way lead to overcharge, or large current discharge (battery large current protection system damage)

The page contains the contents of the machine translation.