Flexible 48-V Electrification with  an Optimum Cost-benefit Ratio

Oechslen, Holger; Binder, Tobias; Cramme, Markus; Warth, Marco

doi:10.1007/s38314-019-0030-8

Cited by 1 publication

(1 citation statement)

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“…Especially for subcompact class vehicles, the additional costs, weight increase, and HV safety measures make the market introduction challenging for vehicles with high degrees of electrification [9]. It was shown that the power limitations of 48 V machines can be increased to over 30 kW, which already covers a large share of driving operating points [10]. Since the voltage level is set by safety regulations, the power is limited by the increasing current, which results in larger wire diameters, cooling efforts, and costs.…”

Section: Introductionmentioning

confidence: 99%

Environmental Impact Assessment and Classification of 48 V Plug-in Hybrids with Real-Driving Use Case Simulations

et al. 2022

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Plug-in hybrid electric vehicles (PHEVs) are commonly operated with high-voltage (HV) components due to their higher power availability compared to 48 V-systems. On the contrary, HV-powertrain components are more expensive and require additional safety measures. Additionally, the HV system can only be repaired and maintained with special equipment and protective gear, which is not available in all workshops. PHEVs based on a 48 V-system level can offer a reasonable compromise between the greenhouse gas (GHG) emission-saving potential and cost-effectiveness in small- and medium-sized electrified vehicles. In our study, the lifecycle emissions of the proposed 48 V PHEV system were compared to a conventional vehicle, 48 V HEV, and HV PHEV for individual driving use cases. To ensure a holistic evaluation, the analysis was based on measured real-driving cycles including Global Position System (GPS) map-matched slope profiles for a parallel hybrid. Optimal PHEV battery capacities were derived for the individual driving use cases. The analysis was based on lifecycle emissions for 2020 and 2030 in Europe. The impact analysis revealed that 48 V PHEVs can significantly reduce GHG emissions compared to vehicles with no charging opportunity for all use cases. Furthermore, the findings were verified for two vehicle segments and two energy mix scenarios. The 48 V PHEVs can therefore complement existing powertrain portfolios and contribute to reaching future GHG emission targets.

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Section: Introductionmentioning

confidence: 99%