As the automotive industry transitions toward electric and autonomous vehicles, the reliability and availability of low voltage (LV) power systems become increasingly critical, particularly for safety-related functions. Current on-board architectures typically use a high voltage (HV) battery for traction and high-power loads, while a separate LV battery remains essential for LV auxiliaries, autonomous driving, and safety-critical systems. To enhance system reliability and reduce dependence on bulky LV energy storage, this paper presents the concept, design, and control of a redundant and fault-tolerant isolated three-port DC-DC converter for HV to LV on-board power supply systems in electric vehicles (EVs). The proposed topology enables power sharing, redundancy, and fault tolerance, allowing a significant reduction in LV battery capacity and the potential elimination of traditional lead-acid technology.
Redundant and Fault-Tolerant Three-Port Bidirectional HV/LV DC-DC Converter for On-Board Automotive Applications: Design and Control
Petrella R.
2026-01-01
Abstract
As the automotive industry transitions toward electric and autonomous vehicles, the reliability and availability of low voltage (LV) power systems become increasingly critical, particularly for safety-related functions. Current on-board architectures typically use a high voltage (HV) battery for traction and high-power loads, while a separate LV battery remains essential for LV auxiliaries, autonomous driving, and safety-critical systems. To enhance system reliability and reduce dependence on bulky LV energy storage, this paper presents the concept, design, and control of a redundant and fault-tolerant isolated three-port DC-DC converter for HV to LV on-board power supply systems in electric vehicles (EVs). The proposed topology enables power sharing, redundancy, and fault tolerance, allowing a significant reduction in LV battery capacity and the potential elimination of traditional lead-acid technology.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
