Simulation study on thermal runaway suppression of 18650 lithium battery

Abstract

In order to improve the safety performance of 18650 lithium battery in storage and transportation, the thermal runaway expansion research of nine-palace grid glass fiber partition packaging was studied by experiment and computational simulation. The results show that the glass fiber partition with a certain gap between the batteries and the partition can effectively inhibit the thermal runaway expansion of lithium battery. The optimal distance between the battery and the partition is 2.2 mm, and the thickness of the partition is 1.2 mm. Under the optimal condition, the highest temperature near the surface of the battery is only about 130. The safety and protection performance of a lithium battery can be significantly improved by using the optimized glass fiber partition packaging.