Energy Management Strategy of Hybrid Energy Storage System Based on Road Slope Information

Tengda Hu, Yunwu Li, Zhi Zhang, Ying Zhao and Dexiong Liu
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Tengda Hu: College of Engineering and Technology, Southwest University, Chongqing 400715, China
Yunwu Li: College of Engineering and Technology, Southwest University, Chongqing 400715, China
Zhi Zhang: BMS Department, Contemporary Amperex Technology Co., Limited, Ningde 352100, China
Ying Zhao: College of Engineering and Technology, Southwest University, Chongqing 400715, China
Dexiong Liu: College of Engineering and Technology, Southwest University, Chongqing 400715, China

Energies, 2021, vol. 14, issue 9, 1-18

Abstract: To maximize the performance of power batteries and supercapacitors in a hybrid energy storage system (HESS) and to resolve the conflict between the high power demands of electric vehicles and the limitations of high-current charging and discharging of the power battery, a vehicle power demand model incorporating road slope information has been constructed. This paper takes a HESS composed of power battery and supercapacitor as the object, and a rule-based energy management strategy (EMS) based on road slope information is proposed to realize the reasonable distribution and management of energy under the slope condition. According to the slope information of the road ahead, the energy consumption in the next period was predicted, and the supercapacitor is charged and discharged in advance to meet the energy demand of uphill and the energy recovery capacity of downhill to avoid the high current charge and discharge of the battery. Subsequently, the improved EMS performance was simulated under the New York City Cycle (NYCC) driving conditions with additional slope driving conditions. The simulated results indicate that compared to the existing EMS, the proposed EMS based on slope information can effectively distribute the power demand between the power battery and the supercapacitor, can reduce the discharge current and the duration of high-power discharge, and has a 20.4% higher energy recovery efficiency, effectively increasing the cruising range.

Keywords: hybrid energy storage system; energy management strategy; slope information (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: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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