Thank You Sponsors!

AVENSYS.COM

CANCOPPAS.COM

DAVISCONTROLS.COM

ENDRESS.COM

EVERESTAUTOMATION.COM

FRANKLINEMPIRE.COM

HCS77.COM

MAC-WELD.COM

PEP-PETRO.COM

SPSSALES.COM

SRPCONTROL.COM

SUMMIT-INSTRUMENT.COM

WESTECH-IND.COM

VERONICS.COM

WAJAX.COM

WIKA.CA

New Method for Estimating State of Charge of Lithium-Ion Batteries in Electric Vehicles [technical]

The post New Method for Estimating State of Charge of Lithium-Ion Batteries in Electric Vehicles [technical] first appeared on the ISA Interchange blog site.

This post is an excerpt from the journal ISA Transactions. All ISA Transactions articles are free to ISA members, or can be purchased from Elsevier Press.

Abstract: This paper presents a state of charge (SOC) estimation method based on fractional order sliding mode observer (SMO) for lithium-ion batteries. A fractional order RC equivalent circuit model (FORCECM) is firstly constructed to describe the charging and discharging dynamic characteristics of the battery. Then, based on the differential equations of the FORCECM, fractional order SMOs for SOC, polarization voltage and terminal voltage estimation are designed. After that, convergence of the proposed observers is analyzed by Lyapunov’s stability theory method. The framework of the designed observer system is simple and easy to implement. The SMOs can overcome the uncertainties of parameters, modeling and measurement errors, and present good robustness. Simulation results show that the presented estima- tion method is effective, and the designed observers have good performance.

Free Bonus! To read the full version of this ISA Transactions article, click here.

Enjoy this technical resource article? Join ISA and get free access to all ISA Transactions articles as well as a wealth of other technical content, plus professional networking and discounts on technical training, books, conferences, and professional certification.

Click here to join ISA … learn, advance, succeed!

Copyright © 2019 Elsevier Science Ltd. All rights reserved.



Source: ISA News