锂离子动力电池具有高比能量、长寿命等特点，是目前电动汽车的主流动力源。然而，由其安全问题引发的事故时有发生。综述介绍并分析了近几年国内外发生的锂离子动力电池典型安全事故及其原因，详细讨论了动力电池热失控机理及热扩展危害，重点对动力电池安全防控技术研究进展进行了概述，并展望动力电池的未来发展方向。

Currently,dynamic lithium-ion battery is main power source for electric vehicle due to its high specific energy and long lifespan.However,accidents caused by its safety problems occur frequently for electric vehicle.This paper introduces typical electric vehicle accidents caused by dynamic lithium-ion batteries in recent years and analyzes the concerning causes.The thermal runaway mechanism and thermal expansion hazards of dynamic batteries are discussed in detail.The research progress in risk prevention and control technology of dynamic lithium-ion batteries is emphatically summarized,and the future development directions for dynamic batteries are also prospected.