Reasons for binary lithium ion battery combustion explosion

Autor: Iflowpower – Dobavljač prijenosnih elektrana

With the continuous development of ternary lithium-ion battery technology, the three-yuan material with higher energy density gradually replaces the lithium iron phosphate material with better stability. Although the ternary material brings a higher energy density for a three-dimensional lithium-ion battery, its thermal stability has become a greater challenge, and it is necessary to analyze the high nickel material at 200 ¡ã C. Release O2, which also leads to a lithium-ion battery drum bag, serious or even heat out of control, developed into a combustion explosion.

The study declared that the thermal out of control was developed into a combustion explosion. It is necessary to have a high temperature analysis of the positive electrode material. The mixed gas exit after the electrolytic liquid is ejected, and a large amount of alkane gas that occurs in the negative electrode and the electrolytic solution, and the gas is mixed after mixing Self-combustion.

In the test, the authors used two ways to trigger heat out of control. The first is to heat, and the electricity battery is heated by adding a hot plate in the lower part of the battery. The second way is to continuously charge the battery with charge and discharge equipment, and trigger battery thermal out of control by overchaling.

It can be divided into five steps: 1. Heating, battery drum bag; 2. One end burying; 3.

Another burying; 4. Quiet combustion; 5. By detected data, when the battery is heated to 215.

7 ¡ã C, the battery starts a distinct blocker and an electrolyte explosion phenomenon, and one end of the battery appears an inversion. Jono 7S after the other end of the battery began to appear, and the battery was started to break, and the firefighting, the process continued to 19S, the highest temperature was 720.1 ¡ã C.

Subsequently, the battery has entered the happiness of the combustion, the process continues 28s. During the entire heating process, the voltage is substantially unchanged until the battery has bursting, the battery voltage suddenly decreases to 0V, which cannot warsh the battery thermal out of control by testing the voltage abnormal manner. Although the three-yuan lithium-ion battery has added many kinds of safety protection measures in the use, it is still no cause of the original person who has a self-ignition explosi.