电动汽车车载光伏充电系统的研究与设计

摘要

This paper focuses on the photovoltaic cell charging device designed for lithium iron phosphate bat- tery group of electric vehicle, proposes an improved MPPT method based on common methods which is Appli- cable to the photovoltaic cell charging device and the proper charging strategy which is applicable to the lithi- um iron phosphate battery group. The device can not only complete the tracking of the maximum power point of photovohaic cell, but make the use of lithium iron phosphate battery at its best, modeling and simulation under the Matlab/Simulink, and on this basis, completes the software design. Finally it demonstrates the fea- sibility of this charging system through experiments.%研究了一种以车载磷酸铁锂动力电池组为基础的电动汽车载光伏电池充电系统。提出了一种适用于该系统的光伏电池最大功率点跟踪算法———步长自适应电流寻优法,以及适用于电动汽车磷酸铁锂动力电池的三阶段充电控制策略。既能跟踪光伏电池最大输出功率,又能使磷酸铁锂动力电池的使用达到最佳状态。在Matlab/Simulink下进行了建模与仿真,并在此基础上完成了系统的设计。