Stellantis Unveils New IBIS EV Battery Tech

Stellantis is taking a big step toward making electric vehicles more affordable, practical, and efficient with the debut of its new Intelligent Battery Integrated System (IBIS). This next-generation battery design, created in partnership with Saft, a TotalEnergies subsidiary, does away with the traditional setup of having separate inverters and onboard chargers. Instead, those functions are built directly into the battery itself.

What Makes IBIS Different – 

In most EVs today, the inverter and charger are separate components. The inverter converts the battery’s direct current (DC) into alternating current (AC) to power the motor, while the onboard charger converts AC from the grid back into DC for charging. IBIS integrates both functions inside the battery pack, using about 200 transistors to handle the job.

The payoff is significant: IBIS cuts weight by nearly 40 kilograms (88 pounds) and frees up 17 liters (0.6 cubic feet) of volume inside the vehicle. Not only does this reduce complexity, but it also makes the system easier to service.

Performance improvements are just as impressive. Stellantis says the system boosts efficiency by up to 10% and delivers a 15% reduction in charging time. On a typical 7 kW AC home charger, that means dropping from about 7 hours to 6 hours.

Real-World Testing Already Underway – 

The first fully functional IBIS prototype is a Peugeot e-3008 built on Stellantis’ STLA Medium platform. Before moving to vehicles, engineers validated the concept with a stationary demonstrator in 2022, proving the architecture worked and even filing patents along the way. Now, road tests are happening in France with real-world driving conditions, providing crucial data.

Why It Matters –

A lack of affordable EVs and long charging times has slowed mainstream adoption. By stripping out separate components and simplifying the powertrain, Stellantis can reduce manufacturing costs, save weight, and improve packaging flexibility. The design also opens the door for easier second-life battery use in stationary energy storage systems—like home backup power or renewable energy grids—once the pack’s automotive lifespan is done.

Looking Ahead – 

Stellantis expects IBIS-equipped vehicles to arrive in production form by the end of the decade. Beyond passenger cars and trucks, the company believes this technology could also serve applications in aerospace, marine, rail, and data centers.

As Stellantis Chief Technology Officer Ned Curic put it: “Simplification is innovation.” By merging key systems into one, IBIS proves that EVs can be lighter, faster-charging, more efficient, and ultimately more affordable.