Prof. Pecht's new battery article available free onlineProfessor Pecht has co-authored a new article “A review of fractional-order techniques applied to lithium-ion batteries, lead-acid batteries, and supercapacitors.” The article, which is now available online for free until June 15 with Elsevier Press, was written in collaboration with Changfu Zou and Torsten Wik, Chalmers University of Technology, Xiaosong Hu, Chonqing University, and Lei Zhang and Zhenpo Wang, Beijing Institute of Technology. No sign up, registration, or fees are required to access this article.
Abstract: Electrochemical energy storage systems play an important role in diverse applications, such as electrified transportation and integration of renewable energy with the electrical grid. To facilitate model-based management for extracting full system potentials, proper mathematical models are imperative. Due to extra degrees of freedom brought by differentiation derivatives, fractional-order models may be able to better describe the dynamic behaviors of electrochemical systems. This paper provides a critical overview of fractional-order techniques for managing lithium-ion batteries, lead-acid batteries, and supercapacitors. Starting with the basic concepts and technical tools from fractional-order calculus, the modeling principles for these energy systems are presented by identifying disperse dynamic processes and using electrochemical impedance spectroscopy. Available battery/supercapacitor models are comprehensively reviewed, and the advantages of fractional types are discussed. Two case studies demonstrate the accuracy and computational efficiency of fractional-order models. These models offer 15–30% higher accuracy than their integer-order analogues, but have reasonable complexity. Consequently, fractional-order models can be good candidates for the development of advanced battery/supercapacitor management systems. Finally, the main technical challenges facing electrochemical energy storage system modeling, state estimation, and control in the fractional-order domain, as well as future research directions, are highlighted.
Please follow this link for the full article as made available, for free, by the publisher.
Published April 30, 2018