Battery equalization based on state of charge

Author

Weijia Li ; Yuzhuo Fu ; Ting Liu ; Pengzhi Chu ; Jiafang Wang ; Hui Chen

Author_Institution

Sch. of Microelectron., Shanghai Jiao Tong Univ., Shanghai, China

fYear

2014

fDate

15-17 Nov. 2014

Firstpage

159

Lastpage

163

Abstract

With the development and popularity of Lithium battery powered PEVs (Pure Electric Vehicles), BMS (Battery Management System) with equalization techniques become a key issue in high performance PEV design. This paper introduces a linear regression based real-time State of Charge calculation method through a second-order RC model of Lithium batteries. Then a fuzzy control method is adopted to balance the remaining capacity among batteries by a set of bi-directional fly-back DC-DC converters. Test bed experiments show that the proposed equalization system can provide effective balance result with relative high overall performances, energy efficiency and robustness.

Keywords

DC-DC power convertors; battery management systems; battery powered vehicles; fuzzy control; regression analysis; BMS; Li; battery equalization; battery management system; bidirectional fly-back DC-DC converters; fuzzy control; high performance PEV design; linear regression; lithium batteries; lithium battery powered PEV; pure electric vehicles; state of charge; Batteries; Battery charge measurement; Computer architecture; Estimation; Integrated circuit modeling; Microprocessors; System-on-chip; Lithium batteries; State of Charge; active balancing; energy transfer; real-time SOC estimation;

fLanguage

English

Publisher

ieee

Conference_Titel

Systems and Informatics (ICSAI), 2014 2nd International Conference on

Conference_Location

Shanghai

Print_ISBN

978-1-4799-5457-5

Type

conf

DOI

10.1109/ICSAI.2014.7009278

Filename

7009278