华南理工大学学报(自然科学版) ›› 2017, Vol. 45 ›› Issue (4): 51-58.doi: 10.3969/j.issn.1000-565X.2017.04.008

• 动力与电气工程 • 上一篇    下一篇

电动车LLC 谐振充电电源系统

吴开源 王佳佳 尹彤 章涛   

  1. 华南理工大学 机械与汽车工程学院,广东 广州 510640
  • 收稿日期:2016-07-14 修回日期:2016-10-13 出版日期:2017-04-25 发布日期:2017-03-01
  • 通信作者: 吴开源( 1978-) ,男,博士,副研究员,主要从事逆变电源及其数字化智能控制研究. E-mail:wuky@scut.edu.cn
  • 作者简介:吴开源( 1978-) ,男,博士,副研究员,主要从事逆变电源及其数字化智能控制研究.
  • 基金资助:

    广东省科技计划项目( 2013B010402002)

Power Supply System for LLC Resonant Charging of Electric Vehicles

WU Kai-yuan WANG Jia-jia YIN Tong ZHANG Tao   

  1. School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2016-07-14 Revised:2016-10-13 Online:2017-04-25 Published:2017-03-01
  • Contact: 吴开源( 1978-) ,男,博士,副研究员,主要从事逆变电源及其数字化智能控制研究. E-mail:wuky@scut.edu.cn
  • About author:吴开源( 1978-) ,男,博士,副研究员,主要从事逆变电源及其数字化智能控制研究.
  • Supported by:
    Supported by the Science and Technology Planning Project of Guangdong Province( 2013B010402002)

摘要: 研制了一种电动车LLC 谐振充电电源系统. 该系统以STM32 为控制核心,采用数字化脉冲频率调制( PFM) 控制,选取满足电动车铅酸蓄电池充电电源要求的LLC 谐振主电路拓扑和4 阶段+ 正负脉冲充电方案. 试验结果表明: 该电源系统能够全程实现LLC谐振主电路的软开关状态,LLC 谐振主电路始终工作于原边MOSFET 功率开关管零电压开通和副边整流二极管零电流关断软开关状态,提高了电源转换效率; 结合电池充电曲线并使用4 阶段+ 正负脉冲充电方式,可以减少过充电及析气极化现象,保护电池,提高充电速度.

关键词: 电动车, 充电电源, 铅酸蓄电池, 正负脉冲充电, LLC 谐振, STM32 芯片

Abstract:

Proposed in this paper is a STM32-based LLC resonant charging power supply system for electric vehicles,which employs digital PFM ( Pulse Frequency Modulation) for the system control and adopts an LLC resonant topology as well as a four stages + positive and negative pulse charging scheme that meets the charging requirements of lead-acid battery.Test results demonstrate that ( 1) the proposed power supply system helps to implement the whole-course soft switching state of the main circuit of LLC resonant converters; ( 2) the main circuit of LLC resonant converters always operates in the primary-side MOSFET ZVS and the secondary-side rectifier diode ZCS softswitching state,which improves the power conversion efficiency; and ( 3) the combination of battery charging curves and four stages + positive and negative pulse charging scheme can reduce the overcharging as well as gassing polarization,protect the battery and increase the charging speed.

Key words: electric vehicle, charging power supply, lead-acid battery, positive and negative pulse charging, LLC resonance, STM32 chip

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