Abstract
This paper discusses the importance of electric vehicles in solving the problem of environmental pollution. In electric vehicles, DC/DC converter is a vital part to connect many electrical units with high voltage bus, so it plays a vital and indispensable role in electric vehicles. The paper analyzes the disadvantages of isolated DC/DC converter, and concludes that non-isolated DC/DC converter is a more suitable technical solution for electric vehicles. The research paper introduces a number of fundamental non-isolated DC/DC converter topologies before analyzing the technical optimization strategies of a number of DC/DC converters in general. which are Half-bridge converters, Cascaded Half-bridge converter (CHB), multi-phase interleaved parallel converter, tri-level converter, soft-switching converter, and switched-capacitor converter (SC converter). The benefits and drawbacks of these DC/DC converter optimization measures are compared, the findings can serve as a technical framework for guiding the application of DC/DC converter technology in the context of electric vehicles. Finally, this paper analyzes and looks forward to the development prospect of flying switched-capacitor DC/DC converters (FCDCs) technology, puts forward the existing technical problems, and gives suggestions for the solution of these problems, which is conducive to the wider application of this technical solution in electric vehicles.
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