An Optimized Energy Management Strategy of 48V Mild Hybrid Electrical Vehicle to Reduce Fuel Consumption

Zeng, Luyao; Zhao, Zhiguo

doi:10.12783/dtmse/smne2016/10578

Cited by 3 publications

(2 citation statements)

References 6 publications

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“…Consequently, the fuel saving of 48 V MHEV can reach 9.24% with Start-Stop function. 24 These three studies did the research in NEDC cycle, and the average fuel benefit contributed by 48 V P0 system was 9.35%. However, one drawback of these studies is that they conducted the research in simulation, which lacks the practical considerations of actual vehicle development.…”

Section: Introductionmentioning

confidence: 99%

The development of the fuel saving control strategy for 48 V P0 system: Design and experimental investigation

Shang,

Zhang,

Yin

et al. 2024

Advances in Mechanical Engineering

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This paper presents a fuel consumption reduction control strategy for a newly-developed 48 V P0 mild hybrid electric vehicle and evaluates its fuel economy benefit experimentally. The strategy is designed with rule-based methods and utilizes various functions such as start-stop, torque boost, regeneration, load shift, BSG neutral mode and torque interventions with BSG. Fuel consumption comparison tests are performed in the WLTP cycle between the MHEV and the conventional vehicle. The authors evaluate the performance of specific key functions, analyze the energy flow of the 48 V battery, and calculate the fuel saving rate of the MHEV. The SOC of the 48 V battery is balanced in the WLTP cycle. The total energy charged to the 48 V battery is 378 Wh, of which 82% comes from the regeneration pattern. The total energy discharged from the 48 V battery is 355 Wh, of which 85% is consumed by the load shift pattern (BSG neutral state and Discharging state). The fuel consumption of the MHEV is reduced by 7.9% compared with the conventional vehicle in the WLTP cycle. The start-stop, BSG neutral, and torque interventions with BSG save fuel by 3.8%, 0.9%, and 0.5% respectively. The other hybrid functions save fuel by 2.7%.

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Section: Introductionmentioning

confidence: 99%

The development of the fuel saving control strategy for 48 V P0 system: Design and experimental investigation

Shang,

Zhang,

Yin

et al. 2024

Advances in Mechanical Engineering

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“…Although battery electric vehicles (BEVs) will be the ultimate solution to carbon emissions, , in order to achieve the average fuel consumption target of 4 L/100 km by 2025 for passenger vehicles in the short term, hybrid electric vehicles (HEVs) including 48 V start/stop (also known as micro-HEV, mHEV) are deemed as the “bridge” from traditional fuel vehicles to pure EVs. Due to its low cost compared with the strong mixing system, 48 V start/stop not only improves the fuel economy by 5–15% − but also needs slight changes within existing vehicle structures, which is the preferred energy-saving scheme for vehicle enterprises. − …”

Section: Introductionmentioning

confidence: 99%

Ultrahigh Power Density and Safety Induced by Ultrathin Electrode Design and Bi-Salt Electrolyte Tailored Lithium Ion Batteries toward Durable 48 V Start/Stop Application

Cao

Gao

et al. 2023

Ind. Eng. Chem. Res.

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It is a bottleneck issue for state-of-the-art start/stop batteries used in commercialized electrical vehicles to have a long cycling life, high power output, and understanding safety performance. In this work, we fabricate prismatic cells to unravel how these tradeoffs can be balanced based on the material and cell design. Small-particle Li[Ni1/3Co1/3Mn1/3]O2 ternary materials with surface modification and isotropous graphite are respectively employed as cathode and anode to provide super power density. Ceramic-coated separators with high permeability and wide-temperature electrolytes with high conductivities enable the safety and cold cranking performance. Ultrathin-coating electrodes and whole poles are achieved to shorten the transferring distance of Li ions and promote the efficiency of Li intercalation and deintercalation kinetics, which demonstrates the lower internal resistance and current density. By unlocking charge transfer limitations, the cell presents a high discharge power density of >5000 W/kg at 25 °C, a 50% SOC (state of charge), and excellent cold cranking characteristics at −30 °C. A capacity retention of 3 C (100% depth of discharge, DoD) cycling approaches 80% over 6800 cycles at 25 °C and 4300 cycles at 45 °C. Also, a capacity retention of cycling at room temperature according to worldwide light vehicle test procedures reaches up to 92.3% over 6000 cycles with the energy throughput of 614.5 kWh and direct charge internal resistance does not soar with the cycling ongoing. The mechanism of the capacity loss is dissolved Ni, Co, and Mn, which results in irreversible loss of Li. The cell shows high safety characteristics by passing the 3 C overcharge and nail penetration tests. It is evident that the reported cell can be a promising commercialized candidate for 48 V start/stop and hybrid electric vehicle solutions.

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Dualhybrid - Proof of a Concept for an HEV with Two Combustion Engines

Zhang

Blesinger

Toedter

et al. 2020

SAE Technical Paper Series

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An Optimized Energy Management Strategy of 48V Mild Hybrid Electrical Vehicle to Reduce Fuel Consumption

Cited by 3 publications

References 6 publications

The development of the fuel saving control strategy for 48 V P0 system: Design and experimental investigation

The development of the fuel saving control strategy for 48 V P0 system: Design and experimental investigation

Ultrahigh Power Density and Safety Induced by Ultrathin Electrode Design and Bi-Salt Electrolyte Tailored Lithium Ion Batteries toward Durable 48 V Start/Stop Application

Dualhybrid - Proof of a Concept for an HEV with Two Combustion Engines

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