Energy Management of Parallel-Connected Cells in Electric Vehicles Based on Fuzzy Logic Control

Chuanxue Song, Yulong Shao, Shixin Song, Cheng Chang, Fang Zhou, Silun Peng and Feng Xiao
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Chuanxue Song: State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130022, China
Yulong Shao: State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130022, China
Shixin Song: School of Mechanical Science and Engineering, Jilin University, Changchun 130022, China
Cheng Chang: College of Automotive Engineering, Jilin University, Changchun 130022, China
Fang Zhou: College of Automotive Engineering, Jilin University, Changchun 130022, China
Silun Peng: College of Automotive Engineering, Jilin University, Changchun 130022, China
Feng Xiao: State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130022, China

Energies, 2017, vol. 10, issue 3, 1-13

Abstract: Inconsistencies that are associated with parallel-connected cells used in electric vehicles induce varied states of charge ( SOCs ) in each cell. Thus, loop current in the battery pack is inevitable, and this reduces overall capacity, energy utilization rate, and pack lifetime. However, no method is available to address loop current. To reduce loop current and the resulting battery inconsistency, a parallel-connected cell pack (PCCP) model that considers thermal effects is established, and a novel Simscape model that is based on PCCP is successfully constructed. Furthermore, the strategy of parallel-connected cell energy management (PCCEM) is proposed to utilize fuzzy logic control (FLC) strategy, which automatically adjusts the number of cells in a circuit in accordance with the load demand, and turns on the first N switches in the corresponding SOC order. The New European Driving Cycle (NEDC) driving cycle simulation shows that the PCCEM strategy considerably reduces loop current and improves the consistency of battery performance and the utilization rate of battery power.

Keywords: parallel-connected cells; loop current; electric vehicle; energy management; fuzzy logic (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: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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