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Electric road for ebus charging on test in Lund/Sweden

© Innovation Skane

The Swedish mid-size university city Lund will significantly improve its public transport system by the introduction of a first tram line currently under construction. But it will also be the place to introduce the “electric road” concept for charging of ebuses on a test route in early 2020.

Solaris Sverige AB, a representative of Polish Solaris Bus & Coach for the Swedish market, participates in an innovative ‘EVolution Road’ project concerning creating an electric road which automatically detects and charges electric vehicles. A Solaris-built trolleybus will be adopted for test drives on an innovatory road. This will be a battery-trolleybus of nearby Landskrona which will be adapted to the new technical specifications.

Battery trolleybus Solaris Trollino on loan from nearby Landskrona  | © Dirk Budach

‘EVolution Road’ is an electric road which will enable battery charging of the bus – and eventually of other electric vehicles – both while driving as well as at a standstill, for instance when parked. Initiated by the Swedish company Elonroad AB together with the Faculty of Engineering at the University of Lund, this research and development project is a cooperation between members from the industry, academia and public sector. These include Solaris, the Faculty of Engineering at Lund University, the Swedish National Road and Transport Research Institute, Lund municipality, Elonroad, Innovation Skåne AB, Kraftringen Energi AB, Ramboll AB and Skånetrafiken.

For demonstration purposes a one kilometer long section of the road will be equipped with electric rails, each of them one meter long. A specially developed pick-up current collection aggregate will be built into the Solaris Trollino battery trolleybus selected for test drives. The traction batteries of the vehicle will be charged as the pick-up receiver under the trolleybus connects with the conductive rail installed in the road. Solaris will hold the responsibility of developing the technical integration between the onboard charging systems and the tailor-made conductive pick-up installed under the vehicle. The construction of the demo site starts in the first quarter of 2020 and the entire project will be running for three years. The total investment is at EUR 9m, mainly publicly funded by the Swedish Transport Administration.

The road uses wireless communication to automatically identify electric vehicles approaching and switches on the power in a one meter long segments directly underneath the vehicle. The power can only be supplied in the areas where the pick-up receivers are able to connect with the rail and receive power. In all other segments in front and behind the moving vehicles, the power will be turned off, making it safe to install this type of charging in both – cities and on highways.

Among the main advantages of this type of while-in-motion charging is the fact that it significantly reduces the need for large, expensive and heavy traction batteries. This in turn results in reduced weight and cost of the electric vehicle. There will be also no need for longer thsan necesaary stops for recharging. The installation causes little interference with existing urban infrastructure. No masts nor overhead wires are needed, and no side-rails will be necessary to protect from collision with pantograph chargers’ masts. The plans assume that charges for using the electric road will be made automatically thanks to wireless communication between the vehicle and the road.

© Innovation Skane