A future electric icon: New Renault 5 electric car built on Alliance’s new CMF-B EV platform undergoing testing 

Set to be unveiled in 2024, the future Renault 5 electric vehicle (EV) offers a glimpse of its future self through insight into its genesis and development. To further develop and fine-tune the future electric Renault 5, Renault experts are currently testing its first nine prototypes which use the Alliance’s new CMF-B EV platform. 

We love the look of this modern small electric car and think it will become an instant electric icon when it hits the road. As a first, decisive step in designing the future production model, Renault are testing the first prototypes, also known as ‘mules’, on all types of terrain and grip, including in extremely cold conditions. With a design based on the Clio silhouette, the mules do not yet look like the future model. A keen pair of eyes will also notice that these mules have a recharge hatch.

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Alternating between static and dynamic fine-tuning and endurance testing, the mules are being put through their paces this winter in low grip in ice and snow in tough conditions in Arvidsjaur (Swedish Lapland). Plus, teasing in average-to-high grip conditions at the Renault technical centres in Lardy in the greater Paris area and Aubevoye in Normandy.

Aubevoye Technical Centre

The Renault site in Aubevoye is unique in that it has the means and cutting-edge tools to reproduce any type of stress vehicles will be put through at the hands of customers. Over 613 hectares it has 35 tracks covering 60km, 42 test lines, two wind tunnels and 18 corrosion chambers.

Extreme Cold Condition Testing

Testing carried out not far from the Arctic Circle in the Arvidsjaur region in the far north of Sweden is ideal for putting the vehicle under extreme stress. A land of ice and frozen lakes, where some winter days hit  minus-30°C with almost unbearable howling winds. The vehicle’s mechanical performance is put to the test to make sure that the future electric Renault 5 mules can withstand such temperatures and conditions. 

The engine, along with other parts, including the batteries, are placed under close surveillance. Checks are also carried out on the performance of on-board systems such as heating, demisting, and defrosting, and to make sure that the brakes, shock absorbers, and ESC (Electronic Stability Control) perform as they should on snow. 

Tests are also carried out to make sure that powder snow does not pile up on the brakes, as it may lead to vehicle malfunctions. A vast array of parameters that cannot be replicated in a testing facility, where only real-world cold-weather testing will suffice.

Jérémie Coiffier, Head of Engineering B EV Family, said: “Tests being carried out on rolling chassis prototypes will help us confirm decisions made in terms of comfort and handling on the upcoming Renault 5 electric. 

“Without giving anything away, the early test drives are a clear indication that it is a worthy descendant of the Megane E-Tech electric with best-in-class performance for its category; encouraging results that drive us to push ahead with testing through to its commercial launch set for next year.”

The CMF-B EV Platform

Used for the first time on the future electric Renault 5, the new CMF-B EV platform will have to take on its position as the most competitive in its segment, while offering best-in-class performance. The platform has therefore taken 70 per cent of the parts featured on the CMF-B platform used for Clio and Captur. Compared to ZOE, the CMF-B EV platform is 30 per cent cheaper to manufacture.

The new modular platform is easier to make, develop, and optimise the performance of next-generation B-segment electric vehicles. The advantages of the new design mean that a new generation of electric vehicles can be created, with adjustable tracks and wheelbase to allow for different body types and styles. 

Like the Megane E-Tech electric, the future electric Renault 5 will be the benchmark for its segment in terms of driving pleasure. The optimised chassis with a multi-link rear axle (usually reserved for more prestige segments) and a lower centre of gravity with batteries installed under the floor will ensure greater dynamic performance.

Delphine De Andria, B-EV Segment Product Performance Director, said: “The new CMF-B EV platform is a great opportunity from a ‘product’ point of view because it means the future electric Renault 5 will boast real driving pleasure while remaining very competitive for its segment.”

New Engine and Batteries Put Through Their Paces

The CMF-B EV platform engine compartment is more compact because the parts used for an electric motor are smaller than those used on an internal combustion engine.

The electric motor on the future electric Renault 5 will be based on the tried-and-tested electrically excited synchronous motor used primarily on the ZOE and Megane E-Tech electric. Not only does it boast better output than a permanent-magnet motor, but it also requires no rare-earth metals meaning that large-scale production costs and the environmental impact are both lower.

The engine will benefit from a new internal architecture, combining three main components:

  • the DC/DC converter that converts the battery’s 400V into 12V.
  • the battery charger
  • the accessory box that manages power distribution

By pooling together the different functions performed by these three components in a single box, the engine is smaller and lighter. Roughly 20kg lighter than that used for the ZOE, the future electric Renault 5 engine will be more enjoyable and dynamic to drive than its predecessor.

The new battery pack will also help give the vehicle the competitive edge sought after by Renault. The switch from the 12 modules seen on the ZOE battery to 4 large modules means the architecture is simpler and 15kg lighter. Equipped with a single layer of modules, the battery pack is a perfect fit for the new platform. The future electric Renault 5 will need less space to transport more kWh.

Special care has also been taken to house the battery pack inside the platform for added protection. Its placement will provide added rigidity to the under-body, thereby also improving the acoustics and driving pleasure.

Ian Osborne
Ian Osborne
Editor-in-Chief at ElectricDrives

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