Suppression of the lithium-ion battery thermal runaway during quantitative-qualitative change

Thermal runaway is the most important safety problem of the lithium-ion battery. A thermal model-combined four side reactions is established to simulate suppression of the thermal runaway of a lithium-ion battery, and the effect of suppression starting time is analyzed to further reveal the thermal runaway suppression mechanism. The results show that thermal runaway is triggered by the heat generation of negative material reaction when it is heated with 473.15 K, and heat dissipation in the bottom part of negative electrode material at 293.15 K can effectively inhibit the occurrence of thermal runaway before solid electrolyte interface (SEI) decomposition reaction starts. In addition, the suppression of runaway battery heat is to suppress the negative electrode material reaction actually, and when the heat is dissipated at 293.15 K, it could be conducted before the SEI decomposition reaction starts, which has nothing to do with the advance time.