REDSEL Project Targets Elimination of 12-Volt Battery in Electric Vehicles

Why It Matters

Removing the 12‑volt battery reduces vehicle weight, complexity, and a critical failure point, accelerating cost‑effective EV adoption and enhancing system reliability.

Key Takeaways

• Eliminates traditional 12‑volt battery in EVs
• Uses two high‑voltage batteries with active balancing
• Compact multi‑input converter reduces weight and space
• SiC MOSFETs and OptiMOS‑7 improve efficiency
• Semiconductor switches replace mechanical relays for safety

Pulse Analysis

The 12‑volt battery, a legacy from internal‑combustion vehicles, has become a paradox in electric cars: essential for powering accessories yet a single point of failure that adds mass and occupies valuable space. As EV ranges tighten and vehicle architectures evolve toward higher integration, manufacturers are seeking ways to streamline power distribution without compromising safety or functionality. Industry analysts note that the low‑voltage subsystem often accounts for up to 10% of a vehicle's total battery weight, prompting a reevaluation of traditional designs.

REDSEL addresses this challenge by re‑architecting the powertrain to draw low‑voltage loads directly from two high‑voltage modules. Active balancing between the batteries ensures even load sharing, while a newly developed multi‑input converter consolidates power conversion into a compact, high‑efficiency unit. The use of Infineon's 750 V silicon‑carbide MOSFETs and 30 V OptiMOS‑7 devices not only boosts switching performance but also eliminates bulky mechanical relays, cutting both weight and part count. Early testing indicates a potential 15‑20% reduction in system mass and a measurable increase in fault tolerance, key metrics for next‑generation autonomous platforms.

For the broader automotive market, this breakthrough could reshape supply chains and design standards. Automakers may lower material costs and free up chassis space for additional sensors or battery capacity, directly influencing vehicle pricing and range. Moreover, the semiconductor‑centric approach aligns with the industry's shift toward digital, software‑defined vehicle architectures, paving the way for more scalable, over‑the‑air updates. As regulatory pressures mount for safer, more efficient EVs, REDSEL's architecture offers a compelling pathway to meet those demands while accelerating the transition to fully electric mobility.