eLi15

oUR VEHICLE FROM 2015

So far it has participated at the EducEco Challenge in Colomiers, France and the Shell Eco-marathon Europe. It has shown its reliability and efficiency at both competitions successfully. At the EducEco it was finishing all test and competition runs and at the Shell Eco-marathon all test and 3 out of 4 competition runs.

eLi15 was for modified for the EducEco competition due to differences in the reglements. At the EducEco the Battery of eLi15 was suported by silcon solar panels, while we used Gallium-Arsenic at the Shell Eco-marathon. Even the motor controller was diffrent. We tuned our motor controller from the previous seasons for the EducEco and developed our own for the Shell Eco-marathon. 

Competitions: Achievements in the “Battery Electric Prototype” class

Shell Eco Marathon Europe

–   1st place (863km/kWh, equals 7702 km/l Super Plus95)

Educ Eco

–   1st place (1888km/kWh, equals 16850 km/l Super Plus95)

–   Winner of the  “Grand Prix”, of all Prototypes, for the best prototype concept and result

–   Winner of the  Design Award, for for the best concept and execution

–   Winner of the Technical Innovation Award, for the engineering work     done for the leightweight cross member with a weight of 840 grams

–   Winner of the  Best Motorization Award, for the leightweight motor assembly weighing just 512 grams

eLi15

The Technical Features of the Vehicle

Key Data

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Mass (ready to drive) in kg
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Design speed in km/h

Monocoque made from carbon fibre reinforced plastic (CFRP)

Propelled by an electromotor

Energy provided by LiPo batteries and solar cell

Power Train

Lithium-Polymer batteries as energy storage

Solar cells as secondary energy source

Battery management system

Specifically designed electric motor

Chain transmission

Self-developed motor controller

Communication via CAN-Bus 

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Nominal power in W
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Power conumption while maintaining on flat surface in km/h and W

Chassis

CFK Tooling of all parts using the VAP process

Chassis parts manufactured with prepreg technology

 

Monocoque:

      Integral design for enhanced stability

      Weight without attachement parts 7 kg

      Aerodynamicyally optimized shape

    

      17 mm aluminium honeycomb as sandwich material

Top cover-monocoque: conic flange as connecting element

Top cover: flange connects to monocoque; embedded solar cells

Crossbeam: self-supporting, aerodynamically neutral airfoil

Windshield: 3D formed PMMA

All attachements made of CFRP 

Suspension

 3 wheels for reduced rolling friction

Axles adjustable in all dimensions

Space saving, precise front axle steering based on bowden wires

Specifically designed kinematics of the front axle for reduced rolling friction and optimal handling while cornering

Hydraulic disc brakes