Exothermal data from thermal safety assessment of type 18650 lithium-ion batteries with NMC and LFP cathodes and sodium-ion batteries by means of Accelerating Rate Calorimetry (ARC)

Data of safety investigation and thermal abuse behavior of commercial type 18650 LIB and SIB cells is provided. It has been acquired with Accelerating Rate Calorimetry (ARC), using a Thermal Hazard Technology type ES ARC. Moreover, thermal abuse was done by means of the so-called Heat-Wait-Seek (HWS) test, at state of charge (SOC) of 100. Data of different cathode chemistries (NMC and LFP) and cell type (Na-Ion vs Li-Ion) is provided. For each cell, data includes the exothermal behavior of the cells, which is recorded only when the cell is behaving exothermally in the ARC, above a threshold of 0.02 °C / min. Hence, in the files, time in minutes, temperature on the surface at the center of the cell in °C and the registered temperature rate in °C / min is provided. Cell type and for LIB cathode chemistry is indicated in the file name, each set of parameters has been tested twice with two different cells, which is indicated with cell and consecutive numbering of the test number. This data is supporting this article: https://doi.org/10.1016/j.jpowsour.2025.237240 More exothermal ARC date can be found here: Type 21700 cells: https://doi.org/10.5281/zenodo.7707929 Type 4680 cells: https://doi.org/10.5281/zenodo.14956635