E-bike project 'ethec'
Electric motorcycle with 400 km range developed
ETH Zurich students tackled the challenges of urban mobility with the 'ethec' project. The result is an electric motorcycle with special battery technology and a range of 400 km.
ETH Zurich's annual focus projects offer students the opportunity to develop a product themselves - from the initial draft, through engineering and design, to production and marketing. The necessary knowledge is gathered through self-study, parallel to ongoing courses and through dialog with partners from industry, supervisors and professors.
As around 75% of the energy is applied to the front wheel during braking and is therefore lost on conventional motorcycles, 'ethec' uses a wheel hub motor in the front wheel. This can be used to recuperate braking energy and achieve greater efficiency, safety and riding pleasure. The rear wheel also has an electric motor.
The lithium-ion battery with its 1260 cells is kept at a constant, ideal temperature by a thermoelectric cooling system. The interaction between the Peltier element and the oil that completely surrounds all the cells creates a reliable and low-maintenance power source with an impressive long service life and no loss of range. The total storage capacity is 15 kWh and enables a range of 400 km. The wheel hub motors provide 22 kW continuous power and up to 50 kW peak power, thus ensuring a top speed of 135 km/h - the speed limit on Swiss highways is 120 km/h.
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