锂离子电池热失控多米诺效应实证研究*

针对锂离子电池热失控多米诺效应模型未进行实验验证导致可信度低问题,设计搭建了锂离子电池热失控实验舱。围绕锂离子电池热失控多米诺效应模拟存在的三个突出问题,设计实验方案开展实验验证研究。通过实验数据与模拟对比分析,证实一节锂离子电池热失控可以触发多米诺效应使全部锂电池发生热失控;针对模拟存在燃爆时间点比实验提前35.7%、层级燃爆时间间隔比实验增长30.97%,燃烧持续时间比实验减少31.82%的缺陷,提出在模拟中增加外部网格的改进意见;通过实证研究改进后的锂电池热失控多米诺效应模拟模型可用于工程实际。

Lithium-ion Battery Thermal Runaway Domino Effect Experimental Verification Research

Domino effect model for lithium ion battery thermal runaway not verified experiment result in low credibility problem, through independent design structures, lithium ion battery thermal runaway lab, the domino effect on lithium ion battery thermal runaway three prominent problems of the simulation, design experiment plan to carry out the experiment research. By analyzing the experimental data and simulation results: confirm the section of lithium ion battery thermal runaway could trigger a domino effect all thermal runaway in lithium-ion batteries; Aiming at bums and simulation time points ahead of the 35.7%, levels and explosion time interval, 30.97% higher than the experimental combustion experiment duration decreased by 31.82% of the defect, put forward to simulate adding external grid improvements; Through the empirical study on the improved lithium battery thermal runaway domino effect simulation model can be used in engineering practice.