本研究旨在深入探究三元电池在热失控过程中产生的毒性产物,并分析电池结构变化对电学性能和安全性的影响。随着电动汽车市场的快速增长,三元电池因其高能量密度和较长的使用寿命而广受欢迎。然而,电池热失控作为电动汽车安全的重大隐患...本研究旨在深入探究三元电池在热失控过程中产生的毒性产物,并分析电池结构变化对电学性能和安全性的影响。随着电动汽车市场的快速增长,三元电池因其高能量密度和较长的使用寿命而广受欢迎。然而,电池热失控作为电动汽车安全的重大隐患,已成为行业关注的焦点。本研究首先通过火焰触发三元电池的热失控反应,并对反应过程中产生的气体进行收集和分析。实验结果显示,随着荷电状态(state of charge,SOC)的升高,电池热失控也越发剧烈,一旦开始热失控,极易引起周围电池的连锁反应。同时热失控过程中会产生包括一氧化碳(CO)、氟化氢(HF)、丙烯醛、丙烯腈以及含有苯环的有毒有害气体。其中,一氧化碳和其他一些高毒性的化合物对人体健康构成严重威胁。在毒性产物分析的基础上,本研究进一步探讨了热失控过程中电池结构的变化。通过扫描电子显微镜(SEM)、X射线衍射(XRD)、X射线光电子能谱(XPS)等先进表征手段,对热失控前后的电池材料进行观察和分析。结果表明,热失控过程中,电池的正负极材料会发生明显的热解和氧化反应,产生大量的气体和高分子化合物,这些产物会进一步加剧电池的热失控,并导致电池结构的破坏。本研究不仅揭示了三元电池热失控过程中产生的毒性产物及其危害,还深入分析了热失控过程中电池结构的变化。这些研究成果不仅为电动汽车的安全评估提供了重要的数据支持,也为三元电池的改进和优化提供了有益的参考。展开更多
Pyrolysis experiments of a typical printed circuit boards has been carried out under various conditions in a laboratory installation Liquid yield of 15%～21%, gas yield of 15%～20% and solid yield of about 60% were ob...Pyrolysis experiments of a typical printed circuit boards has been carried out under various conditions in a laboratory installation Liquid yield of 15%～21%, gas yield of 15%～20% and solid yield of about 60% were obtained The liquid products had high gross calorific values that might be recycled as fuel oils after simple treatment CO, CO 2 and N 2 were the main constitutes of the gas products Using combustion method, organic carbon of 7% in the solid products could be removed Then the solid products, which contained high purity fiberglass and CaCO 3, could be reused as filling materials in the process of SMC production In addition, the effects of final pyrolysis temperature (FPT) and particle size on pyrolysis products had been investigated The yield of gas products will be increased under high temperature and with powder展开更多
文摘本研究旨在深入探究三元电池在热失控过程中产生的毒性产物,并分析电池结构变化对电学性能和安全性的影响。随着电动汽车市场的快速增长,三元电池因其高能量密度和较长的使用寿命而广受欢迎。然而,电池热失控作为电动汽车安全的重大隐患,已成为行业关注的焦点。本研究首先通过火焰触发三元电池的热失控反应,并对反应过程中产生的气体进行收集和分析。实验结果显示,随着荷电状态(state of charge,SOC)的升高,电池热失控也越发剧烈,一旦开始热失控,极易引起周围电池的连锁反应。同时热失控过程中会产生包括一氧化碳(CO)、氟化氢(HF)、丙烯醛、丙烯腈以及含有苯环的有毒有害气体。其中,一氧化碳和其他一些高毒性的化合物对人体健康构成严重威胁。在毒性产物分析的基础上,本研究进一步探讨了热失控过程中电池结构的变化。通过扫描电子显微镜(SEM)、X射线衍射(XRD)、X射线光电子能谱(XPS)等先进表征手段,对热失控前后的电池材料进行观察和分析。结果表明,热失控过程中,电池的正负极材料会发生明显的热解和氧化反应,产生大量的气体和高分子化合物,这些产物会进一步加剧电池的热失控,并导致电池结构的破坏。本研究不仅揭示了三元电池热失控过程中产生的毒性产物及其危害,还深入分析了热失控过程中电池结构的变化。这些研究成果不仅为电动汽车的安全评估提供了重要的数据支持,也为三元电池的改进和优化提供了有益的参考。
文摘Pyrolysis experiments of a typical printed circuit boards has been carried out under various conditions in a laboratory installation Liquid yield of 15%～21%, gas yield of 15%～20% and solid yield of about 60% were obtained The liquid products had high gross calorific values that might be recycled as fuel oils after simple treatment CO, CO 2 and N 2 were the main constitutes of the gas products Using combustion method, organic carbon of 7% in the solid products could be removed Then the solid products, which contained high purity fiberglass and CaCO 3, could be reused as filling materials in the process of SMC production In addition, the effects of final pyrolysis temperature (FPT) and particle size on pyrolysis products had been investigated The yield of gas products will be increased under high temperature and with powder
