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Vanadium redox flow battery for the future of mobility

The project in Martigny is foreshadowing how fueling stations could look like in several years. The project is led by the “Laboratory of Physical and Analytical Electrochemistry” (LEPA) of the “École Polytechnique Fédérale de Lausanne” (EPFL). The aim is to establish a charging station that is able to charge both battery-electric and hydrogen fuel cell vehicles through the integration of renewable energies. Herewith the type of infrastructure needed to transition to alternatively fueled vehicles can be explored.

Second CellCube at the LEPA 

The CellCube FB 200-400 is already the second vanadium Vanadium is a chemical element with the symbol V and atomic number 23. This steel-grey, bluish shimmering transition metal is mined as ore and used mainly in steel construction. Vanadium can be recovered as a by-product of energy production from coal-fired power plants and by burning heating oil. It is non-flammable, providing high level of safety and, thanks to its full-reusability, has a high residual value. redox Red stands for reduction = gain of electrons, while Ox stands for oxidation = loss of electrons flow storage system in Martigny. A smaller CellCube FB 10-40 system already has operated for over one year at the LEPA. “We are glad that our CellCube has proven itself for the LEPA and that we can realize the follow-up project in December”, said Bengt Stahlschmidt, Head of Global Sales of the GILDEMEISTER energy storage GmbH.
Professor Hubert Girault, director of the LEPA stresses: "We chose the CellCube system because GILDEMEISTER energy solutions is an established manufacturer in the redox Red stands for reduction = gain of electrons, while Ox stands for oxidation = loss of electrons flow battery market, and we have had good success with their systems in a previous project.”

Large scale storage system

To implement the project a CellCube FB 200-400 with a power output of 200 kilowatt and a storage capacity of 400 kilowatt hours will be installed in Martigny. It forms the center piece of the planned fueling station. As control center the CellCube is used for charging electric vehicles as well as for supplying energy to two electrolyzers which produce hydrogen for the hydrogen fuel cell vehicles. Additionally the storage system isolates the fueling station from disturbances in the power grid. Also the CellCube will determine when to optimally charge and when to discharge back into the electric grid. In the course of the project the control will be optimized in order to enable the operation of the fueling station solely through renewable energies.

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