燃料电池汽车中电池建模及其参数估计

目前燃料电池汽车大多采用了燃料电池和蓄电池混合的动力系统方案。研究了燃料电池汽车“超越一号”中锂离子动力电池,在恒流放电和脉冲放电实验的基础上,分析了它的静态和动态特性,并选用了PNGV计划中动力蓄电池的线性模型,在此基础上,根据该模型慢时变的特点,提出了采用最小二乘法在线辨识锂离子动力电池参数的方法,并进行了理论分析和仿真研究。结果表明PNGV模型适用于锂离子动力电池,而且只要将电压测量和电流测量的精度控制在一定范围内,采用上述方法进行参数估计是将是有效的。

Modelling and parameter estimation of Li-ion battery in a fuel cell vehicle

Considering automotive dynamics and economics ,fuel cell and battery hybrid power system is a major plan .Based on the constant current and pulse current datum ,the static and dynamic characters of Li-ion battery were analyzed ,and a lin-ear model in PNGV battery test manual was adopted .At last a method of on-line parameter estimation for this model was presented.Theoretical analysis and simulation study show that PNGV model is suitable for Li-ion power battery,and as long as voltage and current measurement precision are enough,the above mentioned method is effective.