Battery Pack Electro-Thermal ECM Simscape Thermal Imbalance Aging

Battery Pack Thermal Imbalance

Cells in a pack do not cool equally - coolant-path and packaging differences create cell-to-cell thermal resistance variation, so identical cells run at different temperatures, age unevenly, and reach voltage limits at different times.

An electro-thermal study showing how unequal cooling paths alone can drive temperature spread, aging imbalance, and early voltage cutoff in a 3S2P Samsung INR21700-30T (NMC) pack, with cells held identical to isolate the thermal-resistance effect from cell-to-cell variation. Highlights: ECM, Bernardi heat generation, fitted OCV / R0 / entropic-coefficient (dOCV/dT) lookup tables, asymmetric per-cell thermal resistance, CP charge-discharge control, coolant temperature sensitivity sweeps. Request a demo.