Experimental and Numerical Studies on the Effect of Lithium-Ion Batteries’ Shape and Chemistry on Heat Generation

Data sets of internal resistances and open-circuit voltage a particular battery are needed in ANSYS Fluent program to predict the heat generation accurately. However, one set available data, called Chen’s original, does not cover all types shapes batteries. Therefore, this research was intended study effects polarization chemistries on Li-ion Two kinds material (nickel manganese cobalt oxide, NMC, lithium iron phosphate, LFP) three forms (cylindrical, pouch, prismatic) were studied validated with experiment. Internal resistance unique each cell battery. Differences affected magnitude resistance, affecting amount generation. Pouch prismatic cells had lower than cylindrical cells. This may be result forming pattern, which anode, cathode, separator rolled up, making electrons difficult move. In contrast, pouch formed as sandwich layers, resulting moving easily lowering resistance. The did impact entropy change. All batteries displayed exothermic behavior during SOC that gradually became endothermic at around 0.4 onwards.