Recent progress on thermal runaway propagation of lithium-ion battery

The latest research progress in mechanism, modeling and inhibition technology of thermal runaway propagation of lithium-ion power batteries in electric vehicles are reviewed. To meet the high energy requirements of automobiles, power batteries are required to be connected in series and in parallel to provide power. The safety of battery packs has become an important technical issue for large-scale applications of electric vehicles. When a battery cell in the battery pack is in thermal runaway, a large amount of heat is generated, causing the surrounding battery cells to be thermally out of control. Therefore, an important concern of the battery pack safety problem is the problem of thermal runaway propagation in the battery pack. In this paper, the research progress of thermal runaway propagation of lithium-ion batteries at home and abroad is reviewed, and the main factors affecting the thermal runaway propagation characteristics of different types of lithium-ion power batteries are analyzed. The thermal runaway modeling method in the literature is summarized, and the shortcomings of the existing methods are pointed out. From the point of view of thermal safety management of battery system, the research achievements and research directions of thermal runaway propagation inhibition technology are expounded and analyzed. Finally, the future research on thermal runaway propagation has been prospected.