Stellantis and Saft present smarter and more efficient battery

After four years of development, modeling, and simulation, a 25-member team consisting of scientists from CNRS (Centre National de la Recherche Scientifique), engineers from Stellantis and Saft, as well as researchers, has presented an innovative prototype of an energy storage battery with integrated inverter and charging functions. This integration of inverter and charging functions allows for a more efficient, reliable, and cost-effective battery, which not only increases the range of battery-electric vehicles but also requires less space in the vehicle.

This collaborative research project is known as the "Intelligent Battery Integrated System" (IBIS). IBIS integrates the functions of the electric charger and the inverter into lithium-ion battery modules and replaces them with electronic converter boards. This saves space in the vehicle and reduces the cost of the system. According to Stellantis engineers, this represents a breakthrough for mobile and stationary energy storage.

Numerous Patents

A demo model, in operation since summer 2022, is the subject of numerous patents and represents a significant departure from currently common electrical converter systems. As part of the project, a variety of new technical concepts were tested, and practical control and operational functions were realized – all in preparation for use in cars or for stationary applications.

The IBIS project promises to bring a true paradigm shift in the field of electromobility in the design of electric drives. In the IBIS concept, the electronic converter boards for the inverter and charging functions are mounted as close as possible to the lithium-ion battery cells. An advanced control system enables the generation of alternating current for an electric motor directly from the battery. The partners of the IBIS project are currently working intensively on a fully functional vehicle prototype, which is to be tested on Stellantis test benches and tracks as well as on public roads. The plan is to market this technology in vehicles of Stellantis brands within this decade.

“Our path to electrification is paved with innovations and excellent research achievements – using the most advanced technologies. In this way, we aim to meet the specific needs of our electric vehicle customers – such as range, space, and affordability – while simultaneously reducing the CO2 footprint through improved efficiency,” says Stellantis Chief Development Officer Ned Curic. “This revolutionary battery system could be a crucial step in achieving Stellantis' goal of offering practical, user-friendly, and advanced technology for everyone.”

Lower weight, lower costs

By developing an efficient and economically competitive technology, the IBIS project opens up possibilities to reduce the vehicle weight as well as the costs of the electric drive and vehicle manufacturing. At the same time, a multitude of new product features are enabled.