Project Objectives Contribute to climate change prevention Demonstrate that electric vehicle is a viable option for individual mobility Win X-PRIZE competition in the alternative class Add a new business to automotive industry Make Metropolia Automotive recognized worldwide Promote Finnish engineering
Design Objectives Design and build the most advanced AWD electric vehicle suitable for small series manufacturing Registered to road traffic Green: modern technology, efficient, recyclable, lightweight Part of the RaceAbout family: sporty, simple and desirable Using existing components in feasible areas Simple structure, usability, serviceability Vehicle simulated to meet safety regulations
E-RA Specification Performance - Acceleration 0-100 km/h ~ 6 sec. - Top speed > 270 km/h - Oper. Range ~ 200 km - Consumption ~ 145 Wh/km Fuel equivalent ~ 1.6 l/100 km Curb weight 1720 kg Lithium-Titanate battery pack Four wheel direct drive with 4 inboard mount motors Carbon fiber monocoque Advanced, next generation stability control Optimal weight distribution & very low centre of gravity 2 Seats & 100 l of cargo space
Powertrain Four wheel direct drive 4 inboard electric motors 4 inverters Total efficiency ~80 % Advanced, next generation stability control
Motors Permanent Magnet Synchronous Motor with saliency Designed jointly with Lappeenranta University of Technology 250 Nm nominal / 800 Nm peak torque Available from 0 to 2300 rpm Water/air cooled Direct drive through drive shafts No need for gears or differential Weight ~50 kg / motor
Batteries 286 Lithium-Titanate cells (50 Ah each @ 2.3 V) in 143s2p configuration Capacity 33 kwh Voltage 243 415 V Power 200 kw continuous, 330 kw (10s) Fast charging capability (10mins @ 250 kw) Weight 620 kg (1.6 kg/cell) Each cell monitored and the whole system balanced Operating temperature -60-75 C Charge temperature -50-75 C Lifetime ~5 000 cycles
Charging Built in Charger (Brusa NLG5) - Power 3.3 kw - Mains connection 230 V / 16A - Charging time ~ 10 h - Efficiency ~ 91 % Fast Charger (AeroVironment EV250) - Power 3-250 kw - Mains connection 3ph 480-600 V - Charging time ~ 10 min - Efficiency ~ 90 %
Body 24 carbon fibre composite parts bonded together to form E-RA monocoque Self supporting structure BIW weight ~150 kg Torsional stiffness similar to today s production vehicles (>14 000 Nm / deg)
E-RA Appearances
Automotive X-Prize Michigan 2010, 2 nd place
Challenge Bibendum Berlin 2011 Winner: EV rally + Design Award
Le Mans vers le Futur 24 Heures du Mans 2011
e-miglia 2011 800 km Transalp EV rally - 9 th
Nürburgring Nordschleife Road legal EV lap record 8:42,72
Under the skin of ERA
Planned next Demo for 10 min fast charging Further development for the electric motors and the inverters Further development for the control system Making of new records
Partners A-Katsastus AeroVironment AEZ Audi Finland Axco-Motors Bayermann Recaro Bender GmbH Bodycote Bosch Engineering Brusa Elektronik Centrafuse Colornet Componeering Datalex Diagno Diarc Elektrobit Automotive Ensto Electric Fevt Finnish Cultural Foundation Finnish Funding Agency for Technology and Innovation Finnsco Flexible Products Flinkenberg Fortum Henry Fordin Säätiö Idesco ITW Plexus IWS International JJ-Tuonti Kaha Keraplast KhreliX Design Lahti University of Applied Sciences Lappeenranta University of Technology Meca-Trade Navicron Nemko Nokian Tyres Patria Land & Armanent Pilkington Automotive PKC Group Prinel Rallysystems Ruukki Sandvik Mining and Construction Sarlin Race Team Savo Consortium for Education Scan Mould Schaeffler Finland Sheet Metal Innovations Sika Finland Sika Tooling & Composites Simtools GmbH Simulia Finland St1 Southern Illinois University Carbondale Suomen Taksidata Taipale Automotive Technology Industries of Finland Centennial Foundation Test World Tesveka Tuneko Ltd US-Parts Finn-Am Vacon Valmet Automotive VTI Technologies Wela YTM-Industrial Örum WinNova Lasepro
Contact Joonas Sainio Electrical Engineer Juuso Pahlsten Electrical Engineer Helsinki Metropolia University of Applied Sciences Automotive and Transport Engineering firstname.lastname@raceabout.fi www.raceabout.fi/era