Research On the Application of High Efficiency DC-DC Converter in New Energy Vehicles

In response to the global energy crisis and pressing environmental concerns, new energy vehicles (NEVs) have emerged as a critical solution. The shift from traditional fuel vehicles, which exacerbate environmental pollution and deplete energy resources, has heightened interest in NEVs due to their eco-friendly and efficient properties. Within the technological framework of NEVs, the DC-DC converter plays an essential role. It enables efficient electrical energy management and regulation, ensuring the stability, efficacy, and safety of the vehicle's systems. This paper conducts a review of innovative DC-DC conversion technologies, with a particular focus on their application in NEVs. Initially, it presents an overview of the fundamental principles underlying DC-DC converters. It proceeds to describe the design and operational mechanisms of the three classical topologies of DC-DC converters—namely Buck, Boost, and Buck-Boost circuits. The ensuing section details the pivotal DC-DC converter modules utilized in NEVs. Furthermore, the paper elaborates on various novel conversion technologies across three dimensions: multilevel converters, bidirectional converters, and soft switching technologies. This includes the development of new circuit topologies and control strategies, and discusses the advantages these innovative technologies offer. The aim is to contribute to the progressive enhancement of DC-DC converter technologies in forthcoming NEV designs.