Impact of power split configurations on fuel consumption and battery degradation in plug-in hybrid electric city buses. (15th February 2017)

• Record Type: Journal Article
• Authors: Cai, Y.; Ouyang, M.G.; Yang, F.
• Is Part Of: Applied energy. Volume 188(2017)
• Page Start: 257
• Page End: 269
• Publication Date: 2017-02-15
• Subjects: PHEV city bus -- Power split configuration -- Battery degradation -- Fuel consumption; Power (Mechanics) -- Periodicals; Energy conservation -- Periodicals; Energy conversion -- Periodicals; 621.042
• DOI: 10.1016/j.apenergy.2016.11.126
• Languages: English
• ISSNs: 0306-2619

Abstract

Highlights: Optimization and selection study for the input power split configuration applied in PHEV buses. One-dimensional direction search ECMS method is provided to decrease the on-line calculation in real application. Proper input split configuration decreases fuel consumption and battery degradation in plug-in hybrid electric buses. Only 4 of 6 possible input power split configurations are suitable for use. Abstract: Power split configurations exhibit potential on decreasing fuel consumption. However, how to select the best power split configuration among all the possible configurations still need to be explored. In this paper, a one-dimensional searching ECMS (Equivalent Consumption Minimization Strategy) is developed to evaluate fuel consumption for input power split configuration. Additionally, a battery degradation model based on experimental data is applied to evaluate the battery degradation for input power split configuration. According to one-dimensional searching ECMS and battery degradation model, the impact of different input power split configurations on fuel consumption and battery degradation is investigated. Simulations show that configuration T1 has fuel consumption and battery degradation advantages for PHEV city bus application in China. These advantages are observed because the system efficiency operation points of configuration T1 are closer to the high efficiency area than the system efficiency operation points of other input power split configurations. Furthermore, according to the lever model and one-dimensional searching ECMS method, a power split configuration selection method is provided in this paper. The simulation results based on configuration selection method still indicate that configuration T1 appears to have the best fuel economy for PHEV city bus application. Moreover, configuration T5, with a lever length close to 0, exhibits the worst fuel consumption and battery degradation.