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September 19, 2016

Bosch coordinates EV static inductive charging project

Bosch, acting as project coordinator, is working with the Fraunhofer Society and GreenIng on research into an innovative concept for charging vehicles inductively through a magnetic field while the car is parked at a charging station.

Bosch, acting as project coordinator, is working with the Fraunhofer Society and GreenIng on research into an innovative concept for charging vehicles inductively through a magnetic field while the car is parked at a charging station.

Success could make electric cars more eco-friendly to drive and power grids more stable. One challenge to their stability lies in the fact that the amount of energy obtained from renewable sources such as wind, sun, and water is subject to natural fluctuations. With this in mind, the consortium, collaborating through the publicly funded BilawE research project, is developing an inductive charging system to establish an intelligent infrastructure for the sustainable use of renewable energies.

Their solution is based on electric car batteries that enable bidirectional charging: the batteries use a powerful and intelligent charging system to store energy but they can also feed this energy back into the grid as needed. When strong sun and wind result in generation peaks, the electricity will be temporarily stored in the car batteries. When skies are overcast and winds are calm, it will be fed back into the grid to meet demand.

"To make this system work, electric vehicles must be connected to the grid as often as possible and for as long as possible. This, in turn, necessitates a stationary infrastructure – that is, special inductive charging stations that we want to connect to public and local grids, or even isolated grids that supply only a limited area," said Philipp Schumann, a physicist who heads up the project at the Bosch research campus in Renningen.

Wireless charging while parking

The advantage of the inductive system is its wireless charging. Because vehicles no longer have to be connected manually by means of charger cables, they can be connected to the grid more often. The project thus also aims to develop a concept for the economical manufacture of charging system components, as well as a business model for various grid services associated with energy recovery. And because the bidirectional charging stations are connected to the grid, they can also reduce the load on and stabilise the grid even when the vehicles are on the road.

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Strong partners

The BilawE (from the German for bidirectional, inductive charging systems economical in the grid) research project received EUR2.4m (US$2.69m) in funding from the German federal ministry for economic affairs and energy as part of the Elektro Power II programme, and is supported by the leading-edge Electric Mobility South-West Cluster. The partners in the project, besides Bosch, are the Fraunhofer Institute for Solar Energy Systems ISE, the Fraunhofer Institute for Industrial Engineering IAO, and GreenIng. The project kicked off at the start of the year and will run for three years.

The Electric Mobility South-West cluster is one of the most important regional associations in the field of electromobility. The cluster aims to drive forward the industrialisation of electromobility in Germany and to establish the German state of Baden-Württemberg as one of the major providers of electromobility solutions. It brings together leading corporations and SMEs and networks them with local research institutions in four fields of innovation: vehicle, energy, information and communication technology, and production.

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