Stellantis and Saft Test Vehicle Prototype with IBIS Technology

Energy Storage Stellantis and Saft Test Vehicle Prototype with Intelligent Battery Integrated System

2025-09-24 From Stefanie Eckardt | Translated by AI 2 min Reading Time

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As part of a French research collaboration, Stellantis, together with Saft, has worked on the Intelligent Battery Integrated System technology. Practical tests are now beginning on public roads.

The IBIS technology developed in a research initiative improves space utilization in the vehicle and simplifies maintenance by eliminating separate charging and inverter components.(Image: Stellantis) — The IBIS technology developed in a research initiative improves space utilization in the vehicle and simplifies maintenance by eliminating separate charging and inverter components.
(Image: Stellantis)

The first fully functional electric vehicle with the Intelligent Battery Integrated System (IBIS) is a new Peugeot E-3008 on the STLA Medium platform. The prototype is the result of years of development, modeling, and simulation by Stellantis and Saft, with support from E2-CAD, Sherpa Engineering, and French research institutions such as CNRS, Université Paris-Saclay, and Institut Lafayette. Since mid-2022, an initial IBIS demonstrator for stationary applications has been in use, validating key technical concepts and resulting in numerous patents. The transition to a mobile prototype is considered a significant development step.

New Drivetrain Concept

IBIS integrates inverter and charging functions directly into the battery—independent of the battery technology or application. This architecture supports both alternating current and direct current, supplying electrical energy directly to the motor or the onboard network, while simultaneously powering the 12-volt system and the vehicle's auxiliary components. The advantages are primarily found in:

Efficiency & Performance: Up to 10 percent energy efficiency improvement (WLTC cycle) and 15 percent power gain (172 kW vs. 150 kW) with the same battery size.
Weight & Space Savings: Reduces vehicle weight by ~40 kg and frees up to 17 liters of volume, enabling better aerodynamics and design flexibility.
Weight & Space Savings: Early results show a 15 percent reduction in charging time as well as a 10 percent energy saving.
Simplified Maintenance: Easier maintenance and better conditions for the reuse of second-life batteries in both automotive and stationary applications.

IBIS not only simplifies maintenance but also facilitates the reuse of second-life batteries in stationary automotive applications by reducing the need for extensive refurbishment.

Next Steps

Phase 2 of the project began in June 2025 with continued support from the French government under "France 2030." The focus is now on practical tests under realistic driving conditions, which could pave the way for the integration of IBIS technology into Stellantis production vehicles by the end of the decade.

Beyond the automotive industry, the IBIS architecture has potential for a variety of application areas, including rail transport, aerospace, shipping, and data centers. This highlights Stellantis and Saft's commitment to scalable, sustainable electrification. (se)

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Date: 08.12.2025

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