OPTIMAL BATTERY SIZING FOR ELECTRIC VEHICLES CONSIDERING BATTERY AGEING TO MINIMIZE THE TOTAL COST OF THE POWER TRAIN COMPONENTS AND CONSUMED ENERGY

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2021-8-04

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Gezer, Ali

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Due to environmental issues such as emission of carbon gases, massive energy consumption, depleting natural resources regarding the internal combustion engine (ICE) based vehicles, electric vehicles (EVs) have caught more and more attention. To make EVs feasible and common, the batteries' high cost and performance degradation problems have to be overcome. The degradation of the battery regarding both energy capacity and power capability is highly dependent on conditions of utilization. Inspired by the literature, an electric vehicle model and an energy utilization and battery ageing (both calendar ageing and cycle ageing) model are proposed. Then, these models are validated considering a battery electric vehicle (BEV) in the market. The models are used to optimize the battery size to decrease the total cost of the power train and consumed energy over the battery's lifespan considering Worldwide Harmonized Light Vehicles Test Procedure (WLTP). Finally, the effects of possible future improvements in the technology or alterations in user preferences regarding ageing mechanisms, annual distance, price of electricity, specific cost of the battery pack, specific mass of battery pack, specific cost of electric motor (EM) and inverter, specific mass of EM and inverter, and test procedures on the battery size optimization are investigated.

Subject Keywords

Electric Vehicles, Li-ion Battery, Battery Ageing, Battery Size Optimization

URI

https://hdl.handle.net/11511/93157

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

A. Gezer, “OPTIMAL BATTERY SIZING FOR ELECTRIC VEHICLES CONSIDERING BATTERY AGEING TO MINIMIZE THE TOTAL COST OF THE POWER TRAIN COMPONENTS AND CONSUMED ENERGY,” M.S. - Master of Science, Middle East Technical University, 2021.