NDLI: Optimization of power management among an engine, battery and ultra-capacitor for a series HEV: A dynamic programming application

Content Provider	Springer Nature Link
Author	Jeong, Jongryeol Kim, Namwook Lim, Wonsik Park, Yeong Il Cha, Suk Won Jang, Myeong Eon
Copyright Year	2017
Abstract	In a hybrid electric vehicle (HEV) system, it is an important issue on how to distribute the output power from multiple power generating components to operate a vehicle more efficiently. Many studies have been conducted on how to manage multiple power sources of a vehicle based on various optimization theories. In this study, an algorithm to calculate the optimization of a series HEV that has three power generating components, engine, battery and ultra-capacitor, is developed based on dynamic programming. Normally dynamic programming is applied to the optimization of power management and components sizing by estimating potential fuel economy for electrified vehicle such as HEV, Plug-in HEV or Fuelcell HEV. In contrast with most objective systems that have only two power generating components, the system in this study has three power sources. Since the system has three power sources, the number of state and control variables of optimization problem increases. Therefore the number of calculations increases unreasonably. To decrease the number and time of calculations, a new electric model that contains the both characteristics of battery and ultra-capacitor is developed with some assumptions. In comparison with the optimization algorithm which follows the theory of DP with no assumptions, the results from the newly developed algorithm has 1.04 % discrepancy in terms of fuel economy, even though the calculation time decreases to 4400 times less.
Starting Page	891
Ending Page	900
Page Count	10
File Format	PDF
ISSN	12299138
Journal	International Journal of Automotive Technology
Volume Number	18
Issue Number	5
e-ISSN	19763832
Language	English
Publisher	The Korean Society of Automotive Engineers
Publisher Date	2017-07-09
Publisher Place	Seoul
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Power management optimization Dynamic programming Backward simulation Fuel economy Series hybrid electric vehicle Automotive Engineering
Content Type	Text
Resource Type	Article
Subject	Automotive Engineering

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