Mercedes-Benz is significantly strengthening its development activities in battery technology. In a ceremony attended by the German Federal Minister of Economic Affairs Robert Habeck, Baden‑Württemberg’s Minister-President Winfried Kretschmann and other high-ranking guests, Mercedes‑Benz opened the eCampus at the heart of its headquarters in Stuttgart-Untertürkheim.
It is the competence centre for the development of cells and batteries for the future electric vehicles of the brand with the star. The aim is to develop innovative chemical compositions and optimised production processes for high-performance cells with “Mercedes-Benz DNA” and reduce battery costs by more than 30 percent in the coming years.
The Mercedes-Benz eCampus covers the entire field of battery and cell technology. It ranges from the development and evaluation of new cell chemistries and industrial-scale cell production to the testing and certification of complete battery units.
Mercedes-Benz is developing various forms of cell chemistry. Among other things, the company is working on lithium-ion cells with high-energy anodes based on silicon composites and innovative cobalt-free cathode chemistries, as well as on solid-state battery technology. The aim is to develop the best possible cells with
“Mercedes-Benz DNA” for high energy density, fast-charging capability and performance and to build up expertise for their industrialisation.
Specifically, the energy density can be increased to up to 900 Wh/l through the use of new technologies such as high-silicon anodes or solid electrolytes. The only way to scale up production effectively is through comprehensive knowledge of cell chemistry and design. The knowledge gained flows into series production of battery cells at partner companies – for use in future generations of Mercedes-Benz batteries. The importance of mastering cell chemistry for the development of future products has been demonstrated by the VISION EQXX technology programme, for example.
Thanks to a powerful battery with pioneering cell chemistry, this vehicle has set distance and efficiency records for electric vehicles on several journeys.
Operations at the new competence centre for battery technologies in the heart of the Stuttgart-Untertürkheim plant will start in two stages.
The approximately 10,000-square-metre factory for the industrial production of battery cells has started operations after a construction period of around two years. State-of-the-art production facilities in the “Industrial Cell Lab” make it possible to manufacture and test battery cells with different chemistries on an industrial scale. Several tens of thousands of cells can be produced here every year for the development of future battery generations. The production process consists of a series of automated and manual steps. It covers all battery cell manufacturing steps from electrode production to cell assembly including electrolyte filling, forming with the first charging and discharging processes and finishing.
The cell production process has a major influence on the quality of the battery. Mercedes-Benz has therefore the ambition to not only master the chemical composition of the cells, but also the industrial manufacturing process.
The new Industrial Cell Lab enables the company to gain expertise in the economical production of cells with “Mercedes-Benz DNA”. It thus complements the two existing cell laboratories: Novel cell chemistries and advanced cell designs are developed and evaluated in the “Chemistry Lab”. In the “Flexible Cell Lab”, the new developments are produced and tested in automotive pouch cells.
The new building for the second stage is due to be completed by the end of this year. Among other things, this state-of-the-art test and proving centre will house a battery ramp-up factory for product and process development as well as maturity assurance for large-scale industrial production. Various functions of the test centre at the Nabern site will be transferred to the eCampus in Untertürkheim for this purpose. State-of-the-art test benches are being built on an area of around 20,000 square metres to comprehensively test and prove the safety and service life of batteries.
The new Mercedes-Benz eCampus building is located on the site of the former buildings 132/1 and 132/2 in the centre of the Stuttgart-Untertürkheim plant, which looks back on a long and eventful history. The original building 132/1 was built back in 1907 and in its early years housed the production of camshafts and crankshafts. These were used in numerous generations of Mercedes-Benz combustion engines.
Over the years, a number of different capabilities were added. These included tool calibration, the central inspection area, the production inspection area for crankshafts and connecting rods and production management for engines. As a competence centre for future drive technologies, the new eCampus plays a key role in the transformation of the plant with a heritage spanning 120 years.
