리튬이온 이차전지의 cell-to-vehicle(C2V) 확장을 통한 전기차 성능에 대한 수치해석적 연구

Abstract

Globally, the severity of environmental pollution has increased and the development and research of electric vehicles has been active in order to use the internal combustion engine as an alternative to reduce greenhouse gas emissions. In addition, a Lithium-ion secondary battery that provides an energy source that provides must have high power, capacity, and safety. The positive cathode active material, one of the four components constituting the secondary battery, shows different output and capacity characteristics depending on the internal molecular structure. In this paper, through the cell-to-vehicle (C2V) process, the results appearing according to the application of the cathode active material were compared and analyzed through the linkage analysis from the small unit cell to the final stage the vehicle model. First, the unit cell is tested and optimization is performed using the input variables measured in GT-AutoLion. Cell models with various molecular structures were further expanded by utilizing GT-AutoLion's internal database for cell models with secured consistency. The discharge characteristics of cell models to which different cathode active materials are applied were compared and analyzed and expanded to a benchmarked pack system, and finally analyzed in connection with the electric vehicle model constructed in GT-Suite. In order to analyze the mileage of the configured electric vehicle, the drive cruising range was analyzed by applying the driving cycle measurement simulation cycle such as FTP-75, HWFET, US06, and WLTC in GT-Suite. When the pack models to which various positive electrode active materials were applied the drive cruising range of the electric vehicle that was driven was analyzed and the results displayed according to the characteristics were compared.