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Date of Award
Y. Gene Liao
Lithium-ion battery currently is the most popular choice for the onboard energy storage device for electrified light-duty vehicles. Among all commercially available lithium-ion battery types, LiNiMnCoO2 (NMC) is chosen by many automobile manufacturers due to its high specific capacity, high volumetric capacity, high average voltage, and long cycle life. In this dissertation, a 20Ah pouch-type NMC battery cell is tested under different operating conditions considering effects of charging/discharging C-rate, ambient temperature, battery aging, and battery internal short-circuit. Using the experimental data, four types of battery cell models with high fidelity are developed, including equivalent electric circuit, electro-thermal, electrochemical, and NTGK models. Battery cell-level models are also extended to module/pack-level with some battery management system (BMS) features. Finally, battery models are integrated into models of electrified light-duty vehicles to perform investigations on vehicle electrification and hybridization ranging from micro-hybrid, 48V mild-hybrid, full hybrid, and pure electric. The result of this dissertation can be used for designing the layout of battery module/pack and BMS and testing of hybrid and electric vehicle powertrain control algorithm.
Liu, Yiqun, "Pouch-Type Linimncoo2 Battery Experiments And Simulation For Electrified Light-Duty Vehicles" (2022). Wayne State University Dissertations. 3678.