Analysis of Optimal Battery State-of-Charge Trajectory for Blended Regime of Plug-in Hybrid Electric Vehicle

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• Autor: Branimir Škugor
• Autor: Jure Soldo
• Autor: Joško Deur
• Autorova ustanova: Sveučilište u Zagrebu; Fakultet strojarstva i brodogradnje; (Zavod za robotiku i automatizaciju proizvodnih sustava); (Katedra za strojarsku automatiku)
• Znanstveno / umjetničko područje, polje i grana: TEHNIČKE ZNANOSTI; Strojarstvo

Sažetak (engleski)

Plug-in hybrid electric vehicles (PHEV) typically combine several power sources, which call for the use of optimal control strategy design techniques. The PHEV powertrain efficiency can be improved if the battery is gradually discharged by blending fully electric and hybrid driving modes during the whole trip. Here, the battery state-of-charge (SoC) trajectory profile is of particular importance to achieving near-optimal powertrain operation. In order to reveal optimal patterns of SoC trajectory profiles, numerical optimizations of PHEV control variables based on the dynamic programing (DP) algorithm are conducted in the paper. The obtained optimal SoC trajectories are found to form linear-like profiles of minimum length when expressed with respect to travelled distance. Detailed analyses of the DP results point out that the SoC trajectory length is minimized in order to minimize electric losses, which is then reflected in reduced total fuel consumption. This finding is further justified by analyzing the problem of optimal discharging for the simplified battery-only system and for the powertrain as a whole. The impact of engine specific fuel consumption characteristic on the optimal SoC trajectory profile under simplified driving conditions is analyzed, as well.

• Ključne riječi (engleski): plug-in hybrid electric vehicle; power management; battery state-of-charge trajectory; efficiency; optimization; dynamic programming
• Jezik: engleski
• Vrsta publikacije: Znanstveni rad - Izvorni znanstveni rad
• Status objave: Objavljen
• Vrsta recenzije: Recenziran - međunarodna recenzija
• Verzija publikacije: Objavljena verzija rada (izdavačev PDF)
• Naslov časopisa: World Electric Vehicle Journal
• Brojčani podaci: vol. 10, br. 4, str. 75-91
• p-ISSN: 2032-6653
• DOI: https://doi.org/10.3390/wevj10040075
• URN:NBN: urn:nbn:hr:235:193518
• Datum objave publikacije: 2019-11-08
• URL dokumenta: https://www.mdpi.com/2032-6653/10/4/75
• Vrsta resursa: Tekst
• Prava pristupa: Otvoreni pristup
• Datum i vrijeme pohrane: 2024-07-05 12:00:56