Browse Publications Technical Papers 2020-01-1188
2020-04-14

Effect of Battery Temperature on Fuel Economy and Battery Aging when using the Equivalent Consumption Minimization Strategy for Hybrid Electric Vehicles 2020-01-1188

Battery temperature variations have a strong effect on battery aging and battery performance. Significant temperature changes will lead to different battery behaviors. This influences the performance of the Hybrid Electric Vehicle (HEV) energy management strategies. This paper investigates how variations in battery temperature will affect Lithium-ion battery aging and fuel economy of an HEV. The control strategy used is the Equivalent Consumption Minimization Strategy (ECMS) which is a well-known energy management strategy for HEVs. The studied vehicle is a Honda Civic Hybrid and the studied battery is the ANR26650 cell from A123 System. Vehicle simulations are done using multiple combinations of highway and city drive cycles. Multiple outside air temperatures are simulated, each with six ECMS penalty factors for each combination of drive cycles. Battery aging is evaluated using a semi-empirical model combined with the accumulated Ah-throughput method. The simulation results provide insight into how temperature affects the battery capacity, battery aging, and fuel economy. The paper concludes with a discussion of the balance between fuel economy and battery aging in different temperature conditions.

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