TY - JOUR
T1 - Performance Evaluation of Modularized Global Equalization System for Lithium-Ion Battery Packs
AU - Ju, Feng
AU - Deng, Weiwen
AU - Li, Jingshan
N1 - Funding Information:
This work is supported in part by the State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun, China, and in part by the National Science Foundation of China under Grant 51175215.
Publisher Copyright:
© 2015 IEEE.
PY - 2016/4
Y1 - 2016/4
N2 - Battery management system has attracted mounting research attention recently, within which cell equalization plays a key role. Although many research and practices have been devoted to developing various structures of cell equalizers, there are still substantial opportunities for performance improvement yet to investigate. In particular, mathematical modeling and systematic analysis of equalizer systems are limited. In this paper, the performance analysis of the modularized global equalizer system for Lithium-ion battery cell equalization is conducted analytically. Specifically, a mathematical model is developed to emulate the equalization dynamics by considering both charging/discharging and energy loss. Analytical formulas are derived to evaluate the performance of the global equalizer. The introduced model is also compared with the state-of-the-art structures in terms of equalization speed and energy loss. Numerical studies show that the modularized global equalization outperforms others by its substantial reduction on energy loss with similar equalization performance and much less equalizers. In addition, a module segmentation guide is provided to facilitate the equalization system design.
AB - Battery management system has attracted mounting research attention recently, within which cell equalization plays a key role. Although many research and practices have been devoted to developing various structures of cell equalizers, there are still substantial opportunities for performance improvement yet to investigate. In particular, mathematical modeling and systematic analysis of equalizer systems are limited. In this paper, the performance analysis of the modularized global equalizer system for Lithium-ion battery cell equalization is conducted analytically. Specifically, a mathematical model is developed to emulate the equalization dynamics by considering both charging/discharging and energy loss. Analytical formulas are derived to evaluate the performance of the global equalizer. The introduced model is also compared with the state-of-the-art structures in terms of equalization speed and energy loss. Numerical studies show that the modularized global equalization outperforms others by its substantial reduction on energy loss with similar equalization performance and much less equalizers. In addition, a module segmentation guide is provided to facilitate the equalization system design.
KW - Battery management system
KW - cell equalization
KW - electric vehicle (EV)
KW - modularized global equalization
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U2 - 10.1109/TASE.2015.2434052
DO - 10.1109/TASE.2015.2434052
M3 - Article
AN - SCOPUS:84930804883
SN - 1545-5955
VL - 13
SP - 986
EP - 996
JO - IEEE Transactions on Automation Science and Engineering
JF - IEEE Transactions on Automation Science and Engineering
IS - 2
M1 - 7120198
ER -