MPC for battery/fuel cell hybrid vehicles including fuel cell dynamics and battery performance improvement

Abstract In this paper, the performance and durability of hybrid PEM fuel cell vehicles are investigated. To that end, a hybrid predictive controller is proposed to improve battery performance and to avoid fuel cell and battery degradation. Such controller deals with this complex control problem by handling binary and continuous variables, piecewise affine models and constraints. Moreover, the control strategy is to track motor power demand and keep batteries close to a desired battery state of charge which is appropriately chosen to minimize hydrogen consumption. It is important to highlight the consideration of constraints which are directly related to the goals of this paper, such as minimum fuel cell power threshold and time limitation between fuel cell startups and shutdowns. Furthermore, different models have been elaborated and particularized for a vehicle prototype. These models include few innovations such as a reference governor which smooths fuel cell power demand during sharp power profiles, forcing batteries to supply such peaks and resulting a longer fuel cell lifetime. Battery thermal dynamics are also taken into account in these models in order to analyze the effect of battery temperature on its degradation. Finally, this paper studies the feasibility of the real implementation, presenting an explicit formulation as a solution to reduce execution time. This explicit controller exhibits the same performance as the hybrid predictive controller does with a reduced computational effort. All the results have been validated in several simulations.

[1]  Ilya V. Kolmanovsky,et al.  Constraint Handling in a Fuel Cell System: A Fast Reference Governor Approach , 2007, IEEE Transactions on Control Systems Technology.

[2]  Carlos Bordons,et al.  Hybrid model predictive control of a two-generator power plant integrating photovoltaic panels and a fuel cell , 2007, 2007 46th IEEE Conference on Decision and Control.

[3]  Anna G. Stefanopoulou,et al.  Optimum Battery Size for Fuel Cell Hybrid Electric Vehicle— Part I , 2007 .

[4]  Carlos Bordons,et al.  Constrained explicit predictive control strategies for PEM fuel cell systems , 2007, 2007 46th IEEE Conference on Decision and Control.

[5]  H. E. Tseng,et al.  Hybrid model predictive control application towards optimal semi-active suspension , 2006 .

[6]  Z.J. Shen,et al.  Power management strategy based on game theory for fuel cell hybrid electric vehicles , 2004, IEEE 60th Vehicular Technology Conference, 2004. VTC2004-Fall. 2004.

[7]  N.A. Rahim,et al.  Lithium-ion battery charger for high energy application , 2003, Proceedings. National Power Engineering Conference, 2003. PECon 2003..

[8]  K. B. Wipke,et al.  ADVISOR 2.1: a user-friendly advanced powertrain simulation using a combined backward/forward approach , 1999 .

[9]  Alberto Bemporad,et al.  Model predictive control of nonlinear Mechatronic Systems: an Application to a magnetically actuated mass Spring Damper , 2006, ADHS.

[10]  Andrew F. Burke,et al.  Batteries and Ultracapacitors for Electric, Hybrid, and Fuel Cell Vehicles , 2007, Proceedings of the IEEE.

[11]  Alberto Bemporad,et al.  HYSDEL-a tool for generating computational hybrid models for analysis and synthesis problems , 2004, IEEE Transactions on Control Systems Technology.

[12]  V.L. Teofilo,et al.  Advanced lithium ion battery charger , 1997, Fifteenth Annual Battery Conference on Applications and Advances (Cat. No.00TH8490).

[13]  Bart De Schutter,et al.  On hybrid systems and closed-loop MPC systems , 2002, IEEE Trans. Autom. Control..

[14]  C. Bordons,et al.  Development and experimental validation of a PEM fuel cell dynamic model , 2007 .

[15]  D. Hrovat,et al.  Hybrid Model Predictive Control of Direct Injection Stratified Charge Engines , 2006, IEEE/ASME Transactions on Mechatronics.

[16]  John Lygeros,et al.  Controllers for reachability specifications for hybrid systems , 1999, Autom..

[17]  Bart De Schutter,et al.  Equivalence of hybrid dynamical models , 2001, Autom..

[18]  C. C. Chan,et al.  The State of the Art of Electric, Hybrid, and Fuel Cell Vehicles , 2007, Proceedings of the IEEE.

[19]  S. Delprat,et al.  Global Optimisation in the power management of a Fuel Cell Hybrid Vehicle (FCHV) , 2006, 2006 IEEE Vehicle Power and Propulsion Conference.

[20]  Alberto Bemporad,et al.  An MPC/hybrid system approach to traction control , 2006, IEEE Transactions on Control Systems Technology.

[21]  M. Wohlfahrt‐Mehrens,et al.  Ageing mechanisms in lithium-ion batteries , 2005 .

[22]  Alberto Bemporad,et al.  The explicit linear quadratic regulator for constrained systems , 2003, Autom..

[23]  Maria del Mar Arxer,et al.  Hercules project: Contributing to the development of the hydrogen infrastructure , 2007 .

[24]  Lino Guzzella,et al.  Vehicle Propulsion Systems: Introduction to Modeling and Optimization , 2005 .

[25]  Alberto Bemporad,et al.  Control of systems integrating logic, dynamics, and constraints , 1999, Autom..

[26]  Wu Bi,et al.  Robust design of battery/fuel cell hybrid systems-Methodology for surrogate models of Pt stability and mitigation through system controls , 2008 .

[27]  Roger A. Dougal,et al.  Dynamic lithium-ion battery model for system simulation , 2002 .