电动汽车车载充电系统性能提升研究

Research on Performance Improvement of On-board Charging System of Electric Vehicle

车载充电系统能将公共电网的交流电转化为车载储能用的直流电给电动汽车补能,是电动汽车重要的组成部分,其高效的性能指标也成为各车企研究的重点。目前车载充电系统由前级PFC功率因数校正电路和后级DCDC变换电路的两级结构组成,选择适当的拓扑结构对车载充电系统的性能效率提升有着至关重要的作用。本文选择一台某公司某车型在用3.3kW车载充电机产品,通过对其拓扑结构优化、元器件重新选型,设计优化其功率因数和效率指标,打造高性能优势产品。

Vehicle charging system can convert alternating current from public power grid into direct current for vehicle energy storage to recharge electric vehicles,which is an important component of electric vehicles.Its efficient performance indicators have also become the focus of research by various automobile enterprises.At present,the onboard charging system is composed of a two-stage structure of the front PFC power factor correction circuit and the rear DCDC conversion circuit.Selecting an appropriate topology structure plays a crucial role in improving the performance and efficiency of the on-board charging system.This paper selects a 3.3kW on-board charger product used by a certain model of a certain company,and designs and optimizes its power factor and efficiency index by optimizing its topology structure,re-selecting components,so as to create high-performance superior products.