A novel mechanical analogy based battery model for SoC estimation using a multi-cell EKF

The future evolution of technological systems dedicated to improve energy efficiency will strongly depend on effective and reliable Energy Storage Systems, as key components for Smart Grids, microgrids and electric mobility. Besides possible improvements in chemical materials and cells design, the Battery Management System is the most important electronic device that improves the reliability of a battery pack. In fact, a precise State of Charge (SoC) estimation allows the energy flows controller to exploit better the full capacity of each cell. In this paper, we propose an alternative definition for the SoC, explaining the rationales by a mechanical analogy. We introduce a novel cell model, conceived as a series of three electric dipoles, together with a procedure for parameters estimation relying only on voltage measures and a given current profile. The three dipoles represent the quasi-stationary, the dynamics and the istantaneous components of voltage measures. An Extended Kalman Filer (EKF) is adopted as a nonlinear state estimator. Moreover, we propose a multi-cell EKF system based on a round-robin approach to allow the same processing block to keep track of many cells at the same time. Performance tests with a prototype battery pack composed by 18 A123 cells connected in series show encouraging results.Comment: 8 page, 12 figures, 1 tabl

Veicolo eletrico "Racing" HI-ZEV

realizzazione di due prototipi di veicoli sportivi ad alte prestazioni con trazione integrale e sistema di propulsione basato su due o quattro motori, uno full electric e l'altro ibrido, secondo il programma definito dal progetto HI.ZEV finanziato dal PON Industria 201

Battelli elettrici Valentino II e Valentino III

realizzazione di una flottiglia di battelli innovativi per il turismo sostenibile dedicati alla zona dell'Argentario secondo il programma del progetto europeo LIFE for Silver Cost (www.lifeforsilvercoast.eu

A tuning procedure for the electric networks of PEM systems

Damping of vibrations in piezo-electromechanical structures relies on a good design of the related electric networks. The most interesting solutions, from the complexity point of view, make use of two operational amplifiers for each piezo-electric transducer. Although the behavior of such circuits coincides with the ideal controller when the two operational amplifiers are assumed to be ideal, damping and stability issues arise when real active components are used. In this paper, it is shown how the actual performance of these circuits can be improved by modifying the interconnection among components. ©2010 IEEE

Rational Approximant Architecture for Neural Networks

Triest