Lightweight Battery Electric Vehicle for Educational Purposes

Abstract

Introducing the concept of Battery Electric Vehicle developed at the Technical University of Liberec, intended for test and educational purposes. It is a lightweight four wheeled vehicle with an open frame primarily designed for ease of access to all major vehicle components. For the main structural elements of the vehicle frame was chosen modular system of extruded aluminum profiles. The vehicle power unit consists of BLDC motor paired with multi-speed manual transmission. Traction battery with regard for the electrical safety consists of 17s LFP cells only, resulting in a nominal voltage of 55 VDC (63 VDC fully charged). Total amount of energy stored in the traction battery is 10.8 kWh.

Review of the Fuel Saving, Life Cycle GHG Emission, and Ownership Cost Impacts of Lightweighting Vehicles with Different Powertrains

“…43,50,76 Conversely, others analyze these technologies as mutually inclusive options by only examining their combined use, which obscures the impact of each technology. 37,38,44,[46][47][48][51][52][53][71][72][73][74][75][77][78][79][80]82 Similarly, others obscure the impact of each technology by analyzing vehicle fleets comprised of a range of different vehicles and technologies. 20,25,29,33,[39][40][41][42]45 ■ FUEL SAVINGS FROM LIGHTWEIGHTING VEHICLES…”

“…Vehicle fuel savings, ,,,,,, GHG emissions, ,,,,,,,− ,,− and ownership costs (vehicle price and/or fuel costs) ,,,,,− ,,,,,,,,,− ,− are the most common metrics examined (though not always on a life cycle basis, as shown in Tables and ), and are thus the focus of this review. Less common metrics include air pollution, , life cycle energy use ,,,, or energy security, solid waste, and structural integrity. − Several articles are also limited to being a description of the design of a particular vehicle ,− or component. − …”

“…This requires an examination of these technologies as independent options (i.e., comparing lightweight and conventional weight versions of alternative powertrain vehicles, and/or alternative and conventional powertrain versions of lightweight vehicles). However, some studies treat these technologies as mutually exclusive options, by excluding their combined use. ,, Conversely, others analyze these technologies as mutually inclusive options by only examining their combined use, which obscures the impact of each technology. ,,,− ,− ,− ,− , Similarly, others obscure the impact of each technology by analyzing vehicle fleets comprised of a range of different vehicles and technologies. ,,,,− , …”

Experimental Electric Vehicle eŠus Gen2

“…The frame design is mixed. It is a combination of a steel weldment and an assembly bolted from extruded aluminum profiles [1].…”

Experimental study of electric vehicle gearbox efficiency

“…All components of the propulsion system we test in our lightweight battery electric vehicle for educational purposes, which has a completely open frame from aluminium profiles. This solution gives an excellent access to all parts of the vehicle and allows easy modification [10]. For our next steps in the research, we need to consider the exact values of each component of the overall efficiency.…”