EV

Stellantis' new 'breakthrough' EV battery tech is now becoming a reality that could set its cars apart from everyone

Published on Sep 23, 2025 at 3:25 AM (UTC+4)
by Claire Reid

Last updated on Sep 23, 2025 at 12:15 PM (UTC+4)
Edited by Kate Bain

Stellantis has announced its breakthrough EV battery technology, known as Intelligent Battery Integrated System (IBIS), has gone from concept to reality, and it could be a game-changer.

Stellantis joined forces with Saft, a subsidiary of TotalEnergies, to work on the project. 

IBIS has been six years in the making and has just hit a major milestone. 

Hailed as ‘a new era in electric powertrain design’, the marque has now unveiled its first prototype vehicle using its breakthrough EV battery technology.

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Stellantis says its breakthrough EV battery technology will make cars more ‘efficient’ and ‘cost effective’

Advancements in EV battery technology have been coming in thick and fast in recent times, like this sodium-ion EV that could last decades, or this 600Wh lithium EV battery that could offer a cure for range anxiety. 

Meanwhile, Stellantis and Saft have been quietly working away on a breakthrough EV battery technology for more than half a decade. 

Stellantis has announced its breakthrough EV battery technology, known as Intelligent Battery Integrated System (IBIS), has gone from concept to reality, and it could be a game-changer
Stellantis

The Intelligent Battery Integrated System aims to offer an ‘efficient, sustainable, and cost-effective energy storage and electric conversion solution’. 

In practical terms, Stellantis says this means:

  • Up to 10 percent energy efficiency improvement, as well as a 15 percent power gain against the same-sized battery
  • A reduction in vehicle weight of an estimated 88lbs (40kg), while also freeing up around 17 liters of volume, making cars more aerodynamic and allowing more freedom when it comes to design
  • A 15 percent reduction in charge time, as well as 10 percent energy savings
  • Easier servicing and a better chance of the battery getting a second-life

“This project reflects our belief that simplification is innovation,” Stellantis Chief Engineering and Technology Officer Ned Curic said. 

“By rethinking and simplifying the electric powertrain architecture, we are making it lighter, more efficient, and more cost-effective.

“These are the kinds of innovations that help us deliver better, more affordable EVs to our customers.”

The first prototype vehicle to use IBIS has been unveiled

The company has announced a major milestone when it comes to its breakthrough EV battery technology, with the first fully functioning IBIB-equipped prototype vehicle now ready for real-life testing. 

Stellantis has announced its breakthrough EV battery technology, known as Intelligent Battery Integrated System (IBIS), has gone from concept to reality, and it could be a game-changer
Stellantis

The first car to be kitted out with the Intelligent Battery Integrated System is a new Peugeot E-3008, built on the STLA Medium platform. 

The carmaker says this new round of testing will help pave the way for IBIS technology to be introduced to its production vehicles by the end of the decade.

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Claire Reid is a journalist who hails from the UK but is now living in New Zealand. She began her career after graduating with a degree in Journalism from Liverpool John Moore’s University and has more than a decade of experience, writing for both local newspapers and national news sites. Claire covers a wide variety of topics, with a special focus on cars, technology, planes, cryptocurrency, and luxury.