Stellantis is developing an improved version of its 48-volt mild-hybrid system, featuring a larger usable battery capacity. The update aims to increase electric driving time and assistance in daily use without moving to a full plug-in hybrid setup.
Significant Battery Capacity Increase
The main change under testing involves boosting the usable battery capacity from about 0.43 kWh to roughly 0.9 kWh. While the total battery size remains close to the current 0.89 kWh, more of its energy will be accessible for driving. This means the electric motor can offer assistance for longer stretches before needing to recharge.
Such an upgrade is expected to improve performance in stop-and-go city traffic. Frequent braking generates energy that the system recovers and stores in the battery, so a larger reserve lets the car use that electricity more effectively during acceleration phases.
Continuing Mild-Hybrid Operation
The system still fits within the current mild-hybrid architecture. The electric motor, rated at 21 kW (around 28 hp) and 38 lb-ft of torque, is integrated inside a six-speed dual-clutch transmission. It assists the gasoline engine during acceleration and can power the car alone briefly under certain conditions.
This upgrade does not mean the vehicle becomes a plug-in hybrid. Instead, it enhances the existing system’s effectiveness by allowing more frequent use of electric power while driving. Stellantis has not yet shared details on fuel economy gains or how long the engine might stay off during electric-only phases.
Prototypes and Brand Plans
Prototypes based on Peugeot 208 and 308 models were recently spotted testing in Southern Europe. They look very close to their production counterparts, suggesting the main updates are mechanical rather than cosmetic.
If development proceeds as expected, this improved mild-hybrid system could also be introduced in other Stellantis brands that use 48-volt tech, including Fiat and Alfa Romeo. However, no specific models or rollout timing have been announced, and changes to power output or pricing remain unknown.
Source: clubalfa.it