Design and Implementation of a Battery Management System for Lithium-Ion Batteries suitable for

135 Pages·2017·5.33 MB·English

by  Χρήστης των Windows

ARISTOTLE UNIVERSITY OF THESSALONIKI
FACULTY OF ENGINEERING
SCHOOL OF ELECTRICAL & COMPUTER ENGINEERING

Design and Implementation of a Battery Management System
for Lithium-Ion Batteries suitable for Automotive Applications

Diploma Thesis

Georgios Darikas

Supervisor: Dr. Christos Mademlis
Associate Professor at Aristotle University of Thessaloniki

Thessaloniki, May 2018

ΑΡΙΣΤΟΤΕΛΕΙΟ ΠΑΝΕΠΙΣΤΗΜΙΟ ΘΕΣΣΑΛΟΝΙΚΗΣ
ΠΟΛΥΤΕΧΝΙΚΗ ΣΧΟΛΗ
ΤΜΗΜΑ ΗΛΕΚΤΡΟΛΟΓΩΝ ΜΗΧΑΝΙΚΩΝ & ΜΗΧΑΝΙΚΩΝ Η/Υ

Σχεδιασμός και Υλοποίηση Συστήματος Διαχείρισης
Μπαταριών για Μπαταρίες Ιόντων Λιθίου Κατάλληλου για
Εφαρμογές Ηλεκτρικών Αυτοκινήτων

Διπλωματική Εργασία

Γεώργιος Δαρίκας

Επιβλέπων: Χρήστος Μαδεμλής
Αναπληρωτής Καθηγητής Α.Π.Θ

Θεσσαλονίκη, Μάιος 2018

To my father,

Acknowledgements
I would like to express my appreciation to my supervisor, Dr. Christos Mademlis for his
guidance and support throughout this thesis project.
My coworkers at hofer eds GmbH deserve my gratitude for all their contribution and interest
in the project. I would especially like to thank Mr. Juergen Kohn for believing in my abilities and
allowing me to take on such an interesting and demanding task, as well as Mr. Matthias Buerchl
for his advice and technical expertise.
I would also like to express my gratitude to Mr. Fotios Panteliadis, for introducing me to the
people of hofer eds GmbH. Without his contribution this collaboration would not be possible.
My sincere gratitude also goes to the PhD candidates of the Electrical Machines Laboratory,
for their continuous support and constructive criticism throughout the years. Mr. Nektarios
Karakasis and Mr. Nikolaos Jabbour, who introduced me to embedded systems, and guided me
through my first battery management system project. Mr. Evangelos Tsioumas, whose advice and
support extended far beyond engineering, and helped me evolve to the person I am today.
Finally, I would like to take the opportunity to thank my family and friends for their love and
support. I would not have been able to complete this work without their sustained
encouragement.

George Darikas
Thessaloniki, May 2018

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Abstract
The use of sustainable energy is becoming increasingly important in today’s world. Therefore,
electric vehicles are currently the best choice for the environment in terms of public and personal
transportation. Because of its high energy and power density, lithium-ion batteries are widely
used in electric and hybrid vehicles. Nevertheless, this battery technology can be dangerous if not
operated within its safe operating range. Therefore, a control system, commonly referred as
battery management system, must be used in every lithium-ion battery system, especially in those
used in electric vehicle applications.
The scope of this thesis is the design and implementation of a battery management system
for lithium-ion batteries, suitable for automotive applications. This includes the definition of the
system requirements, the development of the system’s architecture, the design of the hardware,
taking into consideration the automotive industry standards, and the implementation of a sample
test component of the system for the evaluation of its functionality.
The first two chapters cover a literature review, about battery technologies and their use in
automotive applications. Chapter 3 describes in detail the purpose, functions and topologies of
battery management systems. Then, in Chapter 4, the developed battery management system
architecture is introduced along with its major features and advantages. The basic component of
the system, the module management unit, is presented in detail, and its components and design
solutions are elaborately explained. Chapter 5, provides a thorough description of the hardware
design, including the schematics and PCB layout, while Chapter 6 presents the software
architecture of the system. The experimental results of the testing hardware are depicted in
Chapter 7. Finally, Chapter 8 concludes the thesis work, containing the conclusions from the
experiments and possible future improvements for the system.
The project was carried out in collaboration with hofer eds GmbH. The overall design
procedure was co-supervised by the people in hofer eds GmbH, which also funded the
manufacturing and material costs of the test hardware. The testing process took place in the hofer
eds GmbH facilities in Lenting, Germay, in the electronics laboratory, which was equipped with all
the necessary equipment for the experiments. Aside from the equipment and funding, hofer eds
GmbH provided valuable technical expertise and experience, which contributed significantly to
the completion of the project.

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