Analysis of the Interaction and Variability of Thermal Decomposition Reactions of a Li-ion Battery Cell

Lithium-ion battery cells with high energy density are widely used in today’s electric vehicles. However, thermal runaway (TR) of a cell is still major safety issue the use lithium-ion batteries automotive sector. In particular, variability TR, which not yet fully understood, can lead to significant issues. This paper investigates individual decomposition reactions during TR and their influence on overall scattering behavior. Therefore, differential scanning calorimetry (DSC) measurements components combinations carried out through multiple repetitions. It found that heat release contributions different chemical show variations TR. The anode/electrolyte up 47 %, whereas cathode/electrolyte more consistent release. summarized an diagram combine varying behavior chain reaction mechanism. Thus, be mapped based reactions. These findings should help understand already at material level.