High-Ni NCM811/Graphite Cells

Thermal runaway onset from 470 K

Thermal stability of these commercial large-format cells decreases with state of charge, leading to earlier thermal runaway onset and more violent ejection at high SOC.

Wang, Zhi · Qingjie, Zhao · Bo, Yin · Haoran, Zhai · Wang, Jian · An, Weiguang

Case Studies in Thermal Engineering 2023

Advantages

Thermal runaway onset temperature range 470.1–526.5 K

Maximum flame temperature range 1062.5–1492.0 K

Two peaks in heat release rate at low SOC

Remaining mass decreases with increasing SOC