Optimized dynamic battery model suited for power based vehicle energy simulation

Abstract

Ever increasing demand for the petroleum is causing faster than expected oil shortages in the supply and demand balance around the world and furthermore, many specialists in the field of oil production such as Association for the Study of Peak Oil and World Energy Outlook are claiming that the petroleum is around the peak of its production ( Figure 1). Such shortage made the greatest impact on the gasoline price hikes at the gas pump and thus, this impact was felt by the consumers severely and became the greatest motivation for automotive industries to strive to pioneer the researches for the next generation vehicle configurations ranging from HEV, PHEV, Pure EV to FCHEV (collectively noted as xEV). While the great deal of researches has been carried over the last few decades, it is still far from mass productions for consumer use except for the HEV mainly due to the high cost involved with other types of xEV configurations. Therefore, it is critical to design the vehicle to maximize the use of each component at its highest point regardless of any cost scenarios and it is clear that this optimization can only be achieved through the accurate energy balance simulation for a specific target vehicle prior to the actual hardware implementation. In this paper, it is our intention to introduce modified dynamic battery modeling scheme that would provide a more accurate way of simulating the battery behavior when used in the vehicle energy simulation system. Starting from a typical battery dynamic model to predict the voltage given an imposed current request, we have introduced a new scheme to establish the relationship between the voltage and the power (rather than the current) requested by the vehicle simulation system. The proposed scheme handles the power request from the vehicle simulator considering the dynamic battery characteristics and in turn, contributes to the better estimation of the current integrated energy usage and battery SOC level in the given battery dynamic system used in the vehicle energy simulation system.

Comparing battery electric vehicle powertrains through rapid component sizing

“…They consequently are not suitable for exploring consistent multidimensional design spaces. Different simulation models for BEV design and analysis have been proposed (Belingardi et al, 2018;Dhand and Pullen, 2013;Guezennec et al, 2012;Zhou, 2017). On the other hand, simplified analytical models require significantly lower computational time and can thus be implemented in recursive calculation.…”

Modeling of Lithium Battery Cells for Plug-In Hybrid Vehicles

“…Accordingly, simulations are generally performed using a simplified battery model or a hardware-in-the-loop simulation (HILS) associated with the actual battery [1], [2]. Although research has been carried out on this type of battery modeling [3]- [5], most studies have dealt with low-capacity batteries in the range of several ampere-hours, and there have been very few attempts to validate these models with studies or experiments on high-capacity battery cells with the dozens of ampere-hours required for PHEVs or EVs.…”

Objective performance evaluation on mountain routes of diesel-electric hybrid busses

“…Many models and architecture alternatives have been already proposed and described [1]- [2]. Models can be quasi-stationary [3], [4] or dynamical [5], [6], [7], depending on requirements on accuracy and computation time. In this project a model of medium complexity has been used, to approximate the behaviour with the highest accuracy possible granting characteristics of modularity and expandability but at the same time applicable in the optimal control formulation described in [8] which requires symbolic equations.…”