Optimizing Battery Sizing and Vehicle Lightweighting for an Extended Range Electric Vehicle

Joshi, Arun M.; Ezzat, H. A.; Bucknor, Norman K.

doi:10.4271/2011-01-1078

Cited by 13 publications

(12 citation statements)

References 2 publications

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“…Avoiding overdesign of vehicle components is a well-established principle in both conventional and LW vehicle design, driven by economic incentives and supported by the adoption of computer-aided design and analysis to optimize vehicle parameters without the need for prototypes. ,− When extending the service life of an LW part or vehicle, a reasonable product lifetime must be considered. , For instance, an LW engine block that is designed to last 30 years is overdesigned for a vehicle that will be used for 15 years . Optimal replacement strategies are helpful in understanding the relationship between life cycle impact and product lifetime.…”

Section: Lightweighting Principlesmentioning

confidence: 99%

Green Principles for Vehicle Lightweighting

Lewis

Buchanan

Jhaveri

et al. 2019

Environ. Sci. Technol.

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A large portion of life cycle transportation impacts occur during vehicle operation, and key improvement strategies include increasing powertrain efficiency, vehicle electrification, and lightweighting vehicles by reducing their mass. The potential energy benefits of vehicle lightweighting are large, given that 29.5 EJ was used in all modes of U.S. transportation in 2016, and roughly half of the energy spent in wheeled transportation and the majority of energy spent in aircraft is used to move vehicle mass. We collect and review previous work on lightweighting, identify key parameters affecting vehicle environmental performance (e.g., vehicle mode, fuel type, material type, and recyclability), and propose a set of 10 principles, with examples, to guide environmental improvement of vehicle systems through lightweighting. These principles, based on a life cycle perspective and taken as a set, allow a wide range of stakeholders (designers, policy-makers, and vehicle manufacturers and their material and component suppliers) to evaluate the trade-offs inherent in these complex systems. This set of principles can be used to evaluate trade-offs between impact categories and to help avoid shifting of burdens to other life cycle phases in the process of improving use-phase environmental performance.

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Section: Lightweighting Principlesmentioning

confidence: 99%

Green Principles for Vehicle Lightweighting

Lewis

Buchanan

Jhaveri

et al. 2019

Environ. Sci. Technol.

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“…A recent study conducted by General Motors provides an example of optimizing EV weight and battery size, finding that total vehicle cost can be reduced by lighweighting. 11 Similarly, weight reduction increases the cost/performance optimization window for AFV and highly efficient conventional vehicles, such as by maintaining low acceleration times while reducing engine size.…”

Section: The Impacts Of Vehicle Weight Reduction On Energy Efficiencymentioning

confidence: 99%

Reducing Vehicle Weight and Improving U.S. Energy Efficiency Using Integrated Computational Materials Engineering

Joost

2012

JOM

355

127

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Transportation accounts for approximately 28% of U.S. energy consumption with the majority of transportation energy derived from petroleum sources. Many technologies such as vehicle electrification, advanced combustion, and advanced fuels can reduce transportation energy consumption by improving the efficiency of cars and trucks. Lightweight materials are another important technology that can improve passenger vehicle fuel efficiency by 6-8% for each 10% reduction in weight while also making electric and alternative vehicles more competitive. Despite the opportunities for improved efficiency, widespread deployment of lightweight materials for automotive structures is hampered by technology gaps most often associated with performance, manufacturability, and cost. In this report, the impact of reduced vehicle weight on energy efficiency is discussed with a particular emphasis on quantitative relationships determined by several researchers. The most promising lightweight materials systems are described along with a brief review of the most significant technical barriers to their implementation. For each material system, the development of accurate material models is critical to support simulation-intensive processing and structural design for vehicles; improved models also contribute to an integrated computational materials engineering (ICME) approach for addressing technical barriers and accelerating deployment. The value of computational techniques is described by considering recent ICME and computational materials science success stories with an emphasis on applying problem-specific methods.

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“…The improvement of fuel economy for a range-extended electric vehicle can be realized by matching powertrain parts and a model selection method [8][9][10][11][12]. An optimal gen-set operating line method can minimize fuel consumption at a set level of electric output power.…”

Section: Introductionmentioning

confidence: 99%

Energy Flow Chart-Based Energy Efficiency Analysis of a Range-Extended Electric Bus

Chen

2014

Mathematical Problems in Engineering

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This paper puts forward an energy flow chart analysis method for a range-extended electric bus. This method uses dissipation and cycle energy, recycle efficiency, and fuel-traction efficiency as evaluation indexes. In powertrain energy efficiency analysis, the range-extended electric bus is developed by Tsinghua University, the driving cycle based on that of Harbin, a northern Chinese city. The CD-CS and blended methods are applied in energy management strategies. Analysis results show with average daily range of 200 km, auxiliary power of 10 kW, CD-CS strategy, recycle ability and fuel-traction efficiency are higher. The input-recycled efficiency using the blended strategy is 24.73% higher than CD-CS strategy, while the output-recycled efficiency when using the blended strategy is 7.83% lower than CD-CS strategy.

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Optimizing Battery Sizing and Vehicle Lightweighting for an Extended Range Electric Vehicle

Cited by 13 publications

References 2 publications

Green Principles for Vehicle Lightweighting

Green Principles for Vehicle Lightweighting

Reducing Vehicle Weight and Improving U.S. Energy Efficiency Using Integrated Computational Materials Engineering

Energy Flow Chart-Based Energy Efficiency Analysis of a Range-Extended Electric Bus

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