聚合物锂电池P2D模型的参数辨识方法

Parameter Identification Method for P2D Model of Polymer Lithium Battery

为辨识聚合物锂电池P2D模型的过程参数,在常温25℃下设计不同工况进行实验,内阻测试仪测量辨识欧姆极化参数,0.02 C小倍率放电实验辨识电极固相扩散过程相关参数,激励电流实验辨识反应极化和液相扩散过程参数。经最小二乘拟合相关参数,证明辨识方法可行。

In order to identify the parameters of P 2D model process of polymer lithium battery,different working conditions were designed for experiments at normal temperature 25℃,the internal resistance tester measured and identified ohmic polarization parameters,0.02 C small rate discharge experiment was performed to identify the parameters related to the solid phase diffusion process of the electrode,excitation current experiment to identify the parameters of reaction polarization and liquid phase diffusion process.The least square fitting of relevant parameters proves that the identification method is feasible.