In this work, internal short-circuit tests on prototypically battery cells of different cell capacities were performed to determine scalable dependencies of the thermal runaway. It shows that this pouch cells with NMC111/graphite electrodes must have a minimum capacity of 1.5 A h to develop a thermal runaway. In addition, it could be determined that with increasing battery capacity the strength of the reaction also increases, which is visible, among other things, in the linear temperature increase on the cell surface from 1.5 A h to 3.0 A h of overall 66.77 °C and the increasing weight loss, of up to 37.5 % compared to the starting weight. It could also be shown that the processes of the thermal runaway can be described within certain limits by simple linear (cell surface temperatures, penetration depth, time until cell voltage reaches 0 V) and nonlinear fits (cell weight loss, setoff voltage at TR). This allows the determination of scalable parameters and test results with a minimum of test effort. Furthermore, increasing concentrations of the determined substances could be measured for the infrared-active gaseous reaction products. In particular, the decomposition products CO and CO 2 , as well as the linear hydrocarbons, increase significantly with increasing capacity. On the whole, parameters for the description of the thermal runaway could be determined, which describe the effects and reactions of the thermal runaway well and could minimize test efforts with known materials.