Stellantis unveils IBIS, integrated battery system aimed at cutting EV costs
The Intelligent Battery Integrated System embeds inverter and charger into the battery, reducing weight and enabling faster charging, with production potential by the late 2020s.
Stellantis unveiled a new battery architecture designed to cut the cost and weight of future electric vehicles. The company introduced the Intelligent Battery Integrated System, or IBIS, which embeds inverter and charging functions directly into the battery and eliminates the need for separate components. The first fully functional IBIS-equipped EV is the Peugeot e-300, a prototype developed through years of collaboration with tech firms and the French government.
Company officials described IBIS as a reimagining of the electric powertrain that reduces weight and improves efficiency. Ned Curic, Stellantis’ chief engineering and technology officer, said the approach could deliver better, more affordable EVs by simplifying the architecture and lowering production complexity. IBIS is designed to support both AC slow charging and DC fast charging, feeding energy directly to the motor while also powering the vehicle’s 12-volt network.
Stellantis claims the integrated design yields tangible performance gains. On a standard WLTC cycle, energy efficiency increases about 10%. Power output rises by about 15% for the same battery size (172 kW versus 150 kW). The architecture also trims weight by roughly 40 kilograms and frees up as much as 17 litres of packaging space, enabling better aerodynamics and packaging flexibility. Charging speed is enhanced, with initial results showing around a 15% reduction in charging time on a 7 kW AC charger (roughly six hours from seven) and about 10% overall energy savings. The integration also simplifies maintenance and enhances potential for second-life battery reuse in both automotive and stationary applications.
Phase 2 of the IBIS program began in June 2025 with continued support from the French Government through France 2030. Stellantis said the focus would shift to real-world testing under representative driving conditions to validate the technology in diverse scenarios. If successful, the company said IBIS could be integrated into Stellantis production vehicles by the end of the decade. Beyond cars, Stellantis and Saft see potential applications in rail, aerospace, marine and data centers, underscoring a broader electrification strategy.
Officials emphasized the project’s collaborative nature, noting ongoing work with technology partners and the French government to scale the technology for multiple sectors.