September 22, 2025 - Stellantis Designs New Battery

This is the Telemetry Transportation Daily for September 22, 2025, and I'm Sam Abuelsamid, Vice President of Market Research for Telemetry.  

In North America, the electric vehicles launched so far by Stellantis haven't exactly been roaring successes. The Dodge Charger Daytona has failed to appeal to muscle car fans, and the Jeep Wagoneer S has suffered from numerous technical issues. However, in Europe, Stellantis has a much larger presence in the EV market and engineers in France have been working on a substantially updated battery and propulsion architecture. Developed in partnership with Total Energies' battery unit, Saft, Stellantis announced the Intelligent Battery Integrated System or IBIS. 

IBIS eliminates the discrete power electronics module that handles the conversions between alternating and direct current, as well as the on-board AC charger. Instead, there is an inverter and control board installed on each of the modules in the battery pack. This has numerous benefits, starting with packaging. The traditional PEM takes the high-voltage current from the battery pack and converts it into an AC sine wave, but the signal tends to be noisy, which leads to efficiency loss. In IBIS, each module generates its own cleaner low-voltage AC sine wave, which is then added together. 

The result is a 10% improvement in energy efficiency and 15% more power in the prototype Peugeot e-3008. Charging time is also reduced by 15% while 40 kg of weight is saved.  Battery service is also made easier. The modules are not linked in a high-voltage circuit going to the inverter; instead, each module and integrated inverter only puts out 48V. Thus, the battery can be serviced by technicians without special high-voltage training and tools. This can help keep a battery in service longer by making it easier to replace defective or degraded modules. 

The IBIS is compatible with multiple battery chemistries, including a mix within the same pack. Stellantis hopes to have this architecture in production by the end of the decade. 

Thanks for listening.