Variable structure battery-based fuel cell hybrid power system and its incremental fuzzy logic energy management strategy. (17th April 2020)

• Record Type: Journal Article
• Authors: Shen, Ying; Cui, Pengfei; Wang, Xuechao; Han, Xuefeng; Wang, Ya-Xiong
• Is Part Of: International journal of hydrogen energy. Volume 45:Number 21(2020)
• Page Start: 12130
• Page End: 12142
• Publication Date: 2020-04-17
• Subjects: Fuel cell vehicles -- Hybrid fuel cell/battery power system -- Variable structure battery (VSB) -- Incremental fuzzy logic energy management -- Maintain efficiency and lifespan; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2020.02.083
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: A hybrid power system consists of a fuel cell and an energy storage device like a battery and/or a supercapacitor possessing high energy and power density that beneficially drives electric vehicle motor. The structures of the fuel cell-based power system are complicated and costly, and in energy management strategies (EMSs), the fuel cell's characteristics are usually neglected. In this study, a variable structure battery (VSB) scheme is proposed to enhance the hybrid power system, and an incremental fuzzy logic method is developed by considering the efficiency and power change rate of fuel cell to balance the power system load. The principle of VSB is firstly introduced and validated by discharge and charge experiments. Subsequently, parameters matching of the fuel cell hybrid power system according to the proposed VSB are designed and modeled. To protect the fuel cell as well as ensure the efficiency, a fuzzy logic EMS is formulated via setting the fuel cell operating in a high efficiency and generating an incremental power output within the affordable power slope. The comparison between a traditional deterministic rules-based EMS and the designed fuzzy logic was implemented by numerical simulation in three different operation conditions: NEDC, UDDS, and user-defined driving cycle. The results indicated that the incremental fuzzy logic EMS smoothed the fuel cell power and kept the high efficiency. The proposed VSB and incremental fuzzy logic EMS may have a potential application in fuel cell vehicles. Highlights: A variable structure battery (VSB) is proposed to be integrated with the fuel cell. The VSB was validated via experiment to show improved discharge/charge performance. An incremental fuzzy logic EMS is applied based on fuel cell efficiency & lifespan. Two EMSs for real-time simulations of fuel cell-based power system were compared.