Synergistic inhibition of thermal runaway propagation of lithium-ion batteries by porous materials and water mist

The thermal runaway (TR) propagation of lithium-ion batteries (LIBs) is characterized by fast spread and violent reaction, which can cause a massive fire and even explosion. Blocking TR propagation of LIBs and cooling batteries are crucial to avoid the exacerbation of hazards. In this study, three porous materials (nickel foam, glass wool and nanoporous aerogel) were selected as barriers for LIBs and the corresponding blocking mechanism on TR propagation of LIBs were investigated. Based on this, water mist is released at the moment of thermal runaway of the lithium-ion battery and used to cool the battery. In this work, further research on the inhibition of thermal runaway and its propagation in lithium-ion batteries by porous materials and water mist is carried out. The results show that a good suppression effect can be obtained by a synergistic mechanism of pre-insulation and subsequent heat dissipation with the synergistic action of porous materials and water mist. This study also used the failure mode effects analysis (FMEA) method to evaluate the reliability of the inhibition methods and reveal the application effect of FMEA in the field of LIBs.