Fundamentals and Applications of Lithium–ion Batteries in Electric Drive Vehicles

This book presents the timely topic of battery management systems for lithium batteries. The author systematically expounds the theory of lithium–ion battery management systems and their practical application in electric vehicles, describing the theoretical connotation and practical application of the battery management systems.

Topics such as battery modeling, state estimation, practical information on charging and discharging control technology, cell equalization, application to electric vehicles, as well as the key technologies and research methods of the lithium–ion power battery management system are included. Selected graphics in the book are directly derived from actual vehicle tests. Through comparative analysis of the different system structures and different graphic symbols, related concepts are clarified and understanding of the battery management systems is enhanced.

A theoretical and technical guide to electric vehicle lithium–ion battery management systems

Using simulation technology, schematic diagrams, and case studies, basic concepts are described clearly and a detailed analysis of battery state estimation and charge control principles is offered

Equips readers with the understanding and concept of the power battery, providing a clear cognition of the application and management of lithium–ion batteries in electric vehicles

Features numerous case studies for practical application Fundamentals and Applications of Lithium–ion Batteries in Electric Drive Vehicles is an outstanding resource for researchers and professionals working in energy technologies, as well as utility planners and system engineers. It is also an invaluable guide for graduate and postgraduate students in engineering disciplines.

Chapter 1 Introduction 8

1.1 The development of batteries in electric drive vehicles 8

1.2 Development of the battery management technologies 13

1.3 BMS key technologies 15

Chapter 2 Performance Modeling of Lithium–Ion Batteries 18

2.1 Reaction mechanism of lithium–ion batteries 18

2.2 Testing Characteristics of Lithium–Ion Batteries 20

2.3 Battery modeling method  31

2.4 Simulation and comparison of equivalent circuit models 35

2.5 Battery modeling method based on battery discharging curve 44

2.6 Battery pack modeling 47

Chapter 3 Battery State Estimation 58

3.1 Definition of SOC 58

3.2 Discussion on the battery s SOC estimation 66

3.3 Battery SOC estimation algorithm application 79

3.4 Definition and estimation of the battery SOE 107

3.5 Estimation method of the battery group and the remaining energy 115

3.6 Estimation method of the battery actual available energy 117

Chapter 4 The prediction of battery pack peak power 123

4.1 Analysis on the definition of peak power 123

4.2 Testing methods of peak power 126

4.3 Analysis on peak power 135

4.4 The analysis of available power 141

Chapter 5 The charging control technologies for lithium–ion batteries 148

5.1 Literature review on lithium–ion battery charging technologies 148

5.2 The key indicators for measuring charging characteristics 156

5.3 Charging external characteristic parameters of the lithium–ion battery 174

5.4 The analysis of charging polarization voltage characteristics 176

5.5 The improvement of the constant current and constant voltage charging method 194

5.6 The principles and methods of the polarization voltage control charging method 199

5.7 Summary 210

Chapter 6 The evaluation and equalization of battery consistency 213

6.1 Analysis on batteries consistency 213

6.2 The evaluation indexes of battery consistency 218

6.3 Quantitative evaluation of consistency of the battery 241

6.4 Equalization of the battery pack 251

6.5 Summary 270

Chapter 7 Technologies for the Design & Application of the Battery Management System 272

7.1 The Functions and Architectures of Battery Management System 272

7.2 The design of the Battery Parameters Measurement Module 277

7.3 Design of the Battery Equalization Management Circuit 296

7.4 Data Communication 303

7.5 The logic and Safety Control 308

7.6 Testing for the stability of the BMS 317

7.7 Practical examples of BMS 321

Jiuchun Jiang, Beijing Jiaotong University, China

Caiping Zhang, Beijing Jiaotong University, China