摘要
随着电动汽车的快速发展和大力推广,对大功率动力电池充电系统和充电算法的研究有着十分重要的意义。结合经典的Thevenin等效电路,引入RC支路,建立了改进的蓄电池等效模型。基于零电压功率变换器的拓扑结构,分析了充电电源系统小信号模型。通过构建单-双环闭环控制系统,改进了蓄电池的阶段充电策略,实现了大功率蓄电池的充电在线调整,避免了阶段充电切换过程中的电流断续问题,一定程度上降低了充电过程中的开关损耗。最后通过仿真验证了所提充电系统和控制方案的正确性和有效性。
With the popularization of electric vehicles, high-power battery charging system and intelligent-algorithm was studied with vital significance. An improved Thevenin equivalent battery model was set up via introducing extra RC circuit combining with the classic one. Small-signal model of charging system was analyzed based on ZVS converter. Furthermore, a step-charging control algorithm was proposed by constructing single-double loop control system, and on-line adjustment charging was realized; discontinuous current during the step switching was avoided; switching loss was decreased to some extent. Finally the simulation experiment proves the validity and efficiency of the charging system and control strategy.
出处
《电源技术》
CAS
CSCD
北大核心
2014年第4期737-740,共4页
Chinese Journal of Power Sources
基金
国家外专局项目(W20123400001)
安徽省高校自然科学基金(KJ2011A044)
