【摘要】 随着电动汽车及其相关行业的兴起,对电动汽车用电池充电电源有了较大的需求。区别于传统电源设计,锂离子电池的非线性特性增加了充电电源控制器设计的复杂性。本文根据锂离子电池特性,采用脉冲电流放电法,建立了锂离子电池模型,并对模型参数进行了拟合。进一步分析了带电池负载的充电电源系统小信号模型,在此基础上,根据选择的充电策略,从系统稳定性和纹波要求对充电各阶段控制器参数进行了设计。通过仿真和实验验证,系统控制参数具有较强的鲁棒性,适合锂离子电池充电应用。更多还原

【Abstract】 With the development of Electric vehicle and related industries,there is a great demand for battery charger.However,the nonlinear characteristics of lithium-ion battery charging increase the complexity of power supply controller design.In this paper,lithium-ion battery model is set up,corresponding parameters are evaluated,and constant current discharge method is adopted.Combining with the model of lithium-ion batteries,small signal model of charger was set up.Furthermore,appropriate charging control strategy and method are proposed.The simulation and experiment show that the system’s control parameters are robust and suitable for lithium-ion system.更多还原