R&D project develops bidirectional charging management for e-cars

November 08, 2019 // By Christoph Hammerschmidt
R&D project develops bidirectional charging management for e-cars
Renewable energy – like solar and wind energy - is not continuously available. The intelligent linking of the energy networks with the traction batteries of electric vehicles could compensate for the peaks and troughs of the green energy supply whereby the batteries act as a buffer. A consortium with BMW as project partner is now exploring how best to do this.

In the recently launched research project "Bidirectional charge management - BDL", companies and institutions from the automotive, energy and scientific sectors are jointly developing technological solutions with which electric mobility can become more comfortable for users, cheaper and with lower emissions. The aim of the interdisciplinary project partners is to link vehicles, charging infrastructure and power grids with each other in a holistic approach in such a way that the most comprehensive possible use of regeneratively generated energy is promoted and at the same time the security of supply is increased.

The bi-directional charging capability enables electric vehicles, when connected to a charging station or wallbox designed for this purpose, not only to take up electrical energy for the high-voltage battery, but also to feed it back into the power grid in the opposite direction. The batteries of the electric vehicles thus become mobile energy storage units that can also supply electricity if required. Such an integration of electric vehicles into the power grid requires a series of innovations in the areas of vehicle technology, charging hardware, charging management and communication interfaces to energy industry stakeholders as well as with regard to legal framework conditions. These are created as part of the research project in which, in addition to the consortium leader, the BMW Group, Kostal Industrie Elektrik GmbH (development of charging hardware), the transmission grid operator TenneT and the Karlsruhe Institute of Technology (KIT; research on electricity market and grid repercussions) are also involved.

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