气凝胶毡组合放置方式对锂离子电池热失控特性的影响

摘 要：为减缓热量在锂离子电池货物间传播，通过自主搭建的锂离子电池燃爆实验平台，开展气凝胶毡在锂离子电池包装内的不同放置位置对热失控热量阻隔有效性的研究。结合试验结果分析选取峰值温度、热失控传播时间和速度、烟气浓度、质量损失以及包装破坏程度作为锂电池包装性能评价参数，引入简化的N-GAS毒性定量评估模型，通过对不同气凝胶毡组合放置方式中的锂离子电池包装件进行评价可知：从对电池组的安全和外包装完整性的保护作用效果看，顶部中部组合对热失控传播阻隔效果最好，并且不建议在锂离子电池实际运输中采用三面全包方式。

Effect of the combined placement of aerogel felts on the thermal runaway characteristics of lithium-ion batteries

Abstract: In order to slow down the heat transfer between lithium-ion battery goods, this paper studies the effectiveness of aerogel felt placed in different positions of lithium-ion battery packaging on thermal runaway heat barrier by self-built lithium-ion battery explosion experimental platform. Combined with the analysis of the test results, the peak temperature, thermal runaway propagation time and velocity, gas concentration, mass loss and packaging damage were selected as the evaluation parameters of lithium battery packaging performance, and the simplified N-GAS toxicity quantitative evaluation model was introduced. Through the evaluation of lithium-ion battery packaging parts in different aerogel felt combinations, it can be seen that from the protection effect on the safety of the battery pack and the integrity of the outer packaging, there is the best effect of the thermal runaway propagation barrier in the combination of the top and the middle, and it is not recommended to use the three-sided full packaging in the actual transportation of lithium-ion batteries.