基于退化协变量检测机制的燃料电池性能预测  

Degradation covariate periodic inspection-based prognostics for methanol fuel cell

作　　者：王善华 赵振刚[1,2] 张大骋 WANG Shan-hua;ZHAO Zhen-gang;ZHANG Da-cheng(Faculty of Information Engineering and Automation,Kunming University of Science and Technology,Kunming 650500,China;Yunnan Key Laboratory of Green Energy,Electric Power Measurement Digitalization,Control and Protection,Kunming 650500,China)

机构地区：[1]昆明理工大学信息工程与自动化学院,昆明650500 [2]云南省绿色能源与数字电力量测及控保重点实验室,昆明650500

出　　处：《兰州大学学报(自然科学版)》2025年第1期26-34,共9页Journal of Lanzhou University(Natural Sciences)

基　　金：国家自然科学基金项目(62103174);云南省科技厅重大专项(202202AD080006)。

摘　　要：直接甲醇燃料电池(DMFC)长时间运行会导致其性能衰退.电芯外部和内部退化指标可用来表征其退化状态.外部指标(如输出电压)易监测但难以准确反映内部衰退,内部退化指标(如内部阻抗)可准确描述燃料电池退化机理,但其获取需停机进行复杂电化学测量,造成额外检测成本.内部退化协变量检测频率影响燃料电池预测误差和检测成本,随着检测周期拉长,预测误差上升,检测成本下降,反之亦然.为兼顾预测精度和成本,基于健康状态的预测精度和退化协变量离线测量成本,建立DMFC内部退化协变量定期监测策略,在保证精度的条件下,只进行必要离线检测,并探讨权重分配策略.在全球统一轻型车辆测试循环工况下进行实验验证,结果表明,在当前测试条件下,8 d作为退化协变量检测周期,可同时兼顾高预测精度和低检测成本.When direct methanol fuel cells(DMFC) operate under dynamic conditions,the physical and chemical properties of their membrane electrodes change,leading to calendar degradation.The degradation behavior is related to internal and external degradation covariates,where the data of external degradation covariates(voltage monitoring values) are easy to obtain but cannot accurately describe the internal degradation mechanism of the cell;the internal degradation covariates can accurately describe the internal degradation mechanism but need to be measured by complex offline electrochemical tests,which introduces additional measurement costs.We proposed a prediction model for DMFC based on the prediction accuracy of the state of health and the offline inspection cost of the degradation covariates,and under the condition of guaranteeing the prediction accuracy(minimizing the prediction error),to only conducts the necessary offline inspection(minimizing the number of measurements) and explores the weight allocation strategy.The proposed method was validated on an accelerated aging test under the worldwide harmonized light vehicle test cycle operating conditions.Experimental results showed that,under the current experimental settings,an eight-day periodic degradation covariates inspection delivered a satisfying equilibrium between prediction accuracy and inspection cost.

关 键 词：直接甲醇燃料电池 健康状态 退化协变量 检测周期 检测成本 

分 类 号：TM911.4[电气工程—电力电子与电力传动]