基于锂离子电池线性化模型的电流传感器故障诊断  

Fault diagnosis of current sensor based on linearization model of lithium ion battery

作　　者：潘凤文 弓栋梁 高莹[1] 徐明伟 麻斌[1] PAN Feng-wen;GONG Dong-liang;GAO Ying;XU Ming-wei;MA Bin(State Key Laboratory of Automotive Simulation and Control,Jilin University,Changchun 130022,China)

机构地区：[1]吉林大学汽车仿真与控制国家重点实验室,长春130022

出　　处：《吉林大学学报（工学版）》2021年第2期435-441,共7页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家重点研发计划项目(2016YFB0100300)。

摘　　要：为了对锂离子电池输入电流传感器的故障进行诊断,采用耦合了电池集总热力学模型的一阶Thevenin等效电路模型,基于该模型设计了滑模观测器用于故障诊断策略研究。首先,对非线性参变锂离子电池模型进行线性化,建立了满足整个运行工况运转精度的线性参变锂离子电池模型。然后,对线性参变锂离子电池模型进行重组变换,使原系统中的作为输入的电流在变换后作为新系统的输出。基于变换的新系统,设计了基于温度估计误差修正的滑模观测器用于新系统中输出电流的估计。之后,设计了基于范数的残差评价函数。最后,仿真结果表明了线性化模型的可行性,基于该模型所设计的故障诊断策略能快速检测到输入电流传感器故障的发生,从而验证了本文方法的有效性。In order to diagnose the fault of the input current sensor of the lithium-ion(Li-ion)battery,a linear first-order Thevenin equivalent circuit model of the Li-ion battery, coupled with lumped thermodynamics model,is adopted. Based on this model,a sliding mode observer is designed for fault diagnosis strategy research. First,the nonlinear varying parameters Li-ion battery model is linearized to establish a linear varying parameters Li-ion battery model that satisfies the operating accuracy of the entire operating condition. Then,the linearized Li-ion battery model with varying parameter is recombined and transformed,so that the current in the original system as the input is transformed into the output of the new system. Third,based on the new system of transformation,a sliding mode observer based on temperature estimation error correction is designed to estimate the output current in the new system. Finally,a residual evaluation function based on norm is designed. Simulation results show that the linearized model is feasible;the fault diagnosis strategy designed based on the model can quickly detect the occurrence of input current sensor faults,thus verifying the effectiveness of the proposed fault diagnosis method.

关 键 词：动力工程 锂离子电池 模型线性化 电流传感器 滑模观测器 故障诊断 

分 类 号：TM912[电气工程—电力电子与电力传动]