A novel study was done using a designed 6.7L chamber for experiments under both enclosed and ventilated conditions. Under enclosed condition, for LIB (li-ion battery) above 0% SOC (state of charge), the cases ruptured. Above 50% SOC, an explosion was even triggered. Though the analysis of collected gas from the enclosed condition, the flammable gas (e.g., CH₄, CO) concentration increased as SOC increased, even a gas explosion occurred. Under ventilation, the tendency of case rupture decreased and the gas explosion risk was reduced. Whether the case rupture occurred was depended on the rate of generated gas venting. Fick's Law was adopted to describe this phenomenon. It was found that the external pressure was the key factor impacting the case rupture. This work studied the LIB thermal runaway behaviors from a novel perspective, and provided a reference for the safety protection of the LIBs.

一项新颖的研究是使用设计的 6.7L 室进行的，用于在封闭和通风条件下进行实验。在封闭条件下，对于高于 0% SOC（充电状态）的 LIB（锂离子电池），外壳破裂。高于 50% SOC，甚至引发爆炸。通过对封闭条件下收集到的气体进行分析，可燃气体（例如 CH ₄, CO) 浓度随着 SOC 的增加而增加，甚至发生气体爆炸。通风条件下，外壳破裂的趋势降低，瓦斯爆炸风险降低。是否发生外壳破裂取决于产生的气体排放率。采用菲克定律来描述这种现象。研究发现，外部压力是影响外壳破裂的关键因素。该工作从新颖的角度研究了锂离子电池的热失控行为，为锂离子电池的安全防护提供了参考。