Journal
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
Volume 162, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.rser.2022.112416
Keywords
Electric vehicles; Hybrid energy storage system; Energy management strategy; Driving style; Optimal analysis
Funding
- National Natural Science Foundation of China [52172399]
- NSFC-STINT [5211101894]
- Hunan Key Research and Development Program, China [2020SK2099]
- Scientific Research Fund of Hunan Provincial Edu-cation Department [21A0193]
- Hunan Provincial Innovation Foundation for Postgraduate, China [QL20210197]
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This paper proposes an energy distribution optimization method and an improved topology for hybrid energy storage system in electric vehicles. Through experiments and simulations, it is shown that the proposed method effectively reduces battery degradation and energy loss, providing future research directions.
This paper proposes a novel energy distribution optimization method of hybrid energy storage system (HESS) and its improved semi-active topology for electric vehicles (EVs) to further reduce battery capacity degradation and energy loss. Compared with the traditional HESS semi-active topology, the proposed improved topology reduces the energy loss when the battery charges the supercapacitor (SC) to further enhance the efficiency of the system. The real urban driving data of electric vehicles are collected through experiments and divided into aggressive type, cautious type and standard type according to driving style. Based on the mature multi-mode control (MMC), different weight coefficients are assigned to the two optimization objectives of battery capacity degradation and energy loss based on different driving styles, and gray wolf optimization (GWO) is used to optimize the battery output power upper limit and SC charging upper limit of MMC. The simulation results show that compared with the traditional MMC and semi-active topology, the battery capacity degradation and energy loss are improved under different driving styles. In addition, by further analyzing the simulation results, the research direction of HESS energy distribution strategy in the future is discussed.
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