Cascade Active Balance Charging of Electric Vehicle Power Battery Based on Model Prediction Control

Qi Wang, Chen Wang, Xingcan Li and Tian Gao ()
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Qi Wang: School of Electronic and Information, Northwestern Polytechnical University, Xi’an 710072, China
Chen Wang: School of Electerical Engineering, Xi’an University of Technology, Xi’an 710048, China
Xingcan Li: School of Electronic Information Engineering, Xi’an Technological University, Xi’an 710032, China
Tian Gao: School of Electronic and Information, Northwestern Polytechnical University, Xi’an 710072, China

Energies, 2023, vol. 16, issue 5, 1-15

Abstract: As a bi-directional converter, the Buck-Boost converter, which has the advantages of simple structure and taking the SOC of the battery as the balance variable, is adopted as the balance topology in this paper. In view of the shortcomings of traditional balance topology, which can only balance two adjacent batteries, resulting in a long balance time and insufficient balance accuracy, a cascade active balance charging topology that can balance in intra-group and inter-group situations simultaneously is proposed. At the same time, the fuzzy control algorithm and model predictive control are used as the balance control strategies, respectively, to control whether the MOSFET is on or off in the balance topology circuit. The duty cycle is dynamically adjusted to the size of the balance current to achieve the balance of the battery pack. The results show that the cascade Buck-Boost balance topology based on model prediction control can accurately control the balancing current and improve the accuracy and speed of the balance, and it is more suitable for the actual working process.

Keywords: buck-boost converter; active balance charging; cascade balance topology structure; model predictive control; balance control strategy (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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