Integrated thermal and energy management of plug-in hybrid electric vehicles

JOURNAL OF POWER SOURCES

卷:216

Article

Shams-Zahraei, Mojtaba¹  Kouzani, Abbas Z.¹  Kutter, Steffen²  Baeker, Bernard² 

[1] Deakin Univ, Sch Engn, Waurn Ponds, Vic 3216, Australia

[2] Tech Univ Dresden, Inst Automot Technol Dresden IAD, D-01062 Dresden, Germany

关键词: Energy management strategy;    Temperature;    Thermal management;    Plug-in hybrid electric vehicle;    Optimal control;    Dynamic programing;   

DOI  :  10.1016/j.jpowsour.2012.05.055

来源: Elsevier

【 摘 要 】

In plug-in hybrid electric vehicles (PHEVs), the engine temperature declines due to reduced engine load and extended engine off period. It is proven that the engine efficiency and emissions depend on the engine temperature. Also, temperature influences the vehicle air-conditioner and the cabin heater loads. Particularly, while the engine is cold, the power demand of the cabin heater needs to be provided by the batteries instead of the waste heat of engine coolant. The existing energy management strategies (EMS) of PHEVs focus on the improvement of fuel efficiency based on hot engine characteristics neglecting the effect of temperature on the engine performance and the vehicle power demand. This paper presents a new EMS incorporating an engine thermal management method which derives the global optimal battery charge depletion trajectories. A dynamic programming-based algorithm is developed to enforce the charge depletion boundaries, while optimizing a fuel consumption cost function by controlling the engine power. The optimal control problem formulates the cost function based on two state variables: battery charge and engine internal temperature. Simulation results demonstrate that temperature and the cabin heater/air-conditioner power demand can significantly influence the optimal solution for the EMS, and accordingly fuel efficiency and emissions of PHEVs. (C) 2012 Elsevier B.V. All rights reserved.

【 授权许可】

Free