车用大功率质子交换膜燃料电池堆变负载电流下湿度控制  

Humidity control of automobile high-power proton exchange membrane fuel cell stack under variable loading currents

作　　者：兰子剑 代晓芳 刘青山 陈轶嵩 付佩 LAN Zijian;DAI Xiaofang;LIU Qingshan;CHEN Yisong;FU Pei(School of Automobile,Chang’an University,Xi’an 710064,China)

机构地区：[1]长安大学汽车学院,西安710064

出　　处：《汽车安全与节能学报》2025年第1期127-135,共9页Journal of Automotive Safety and Energy

基　　金：国家重点研发计划“政府间国际科技创新合作”重点专项子题(2021YFE0192900);陕西省自然科学基础研究计划项目(2023-JC-QN-0464);长安大学中央高校基本科研业务费(300102224201,300102224203)。

摘　　要：为解决大功率质子交换膜燃料电池(PEMFC)变负载电流下湿度超调大的问题,该文对电池堆阴极流场湿度和阳极流场湿度均使用模糊自抗扰控制(ADRC)算法。根据水蒸气在电池堆内部的变化机理,建立了额定功率为150 kW的电池堆湿度模型并验证其准确性;随后分析比例-积分-微分(PID)算法的缺陷;最后以加湿器水质量流量为控制变量,对阴极流场湿度和阳极流场湿度均采用ADRC和模糊ADRC算法进行研究。结果表明:电流阶跃绝对幅度为50 A时,相比于PID,ADRC和模糊ADRC控制下的阴极流场湿度超调量分别减小15.5%和16.3%,阳极流场湿度超调量均减小70.3%;电流阶跃绝对幅度为100 A时,ADRC和模糊ADRC控制下的阴极流场湿度超调量分别减小45.0%和47.5%,阳极流场湿度超调量分别减小92.3%和92.4%。本研究揭示了大功率电池组湿度变化的机理,提出了保持水稳定性的方法,从而有效缓解电池组“水淹”和“膜干”问题。To address excessive humidity overshoot in high-power proton exchange membrane fuel cells(PEMFCs)under variable load currents,a fuzzy active disturbance rejection control(ADRC)algorithm was employed for both the cathode and anode flow field humidity regulation.Based on the internal water vapor change mechanism within the battery stack,a humidity model for a 150 kW rated power PEMFC stack was developed and validated.Subsequently,the limitations of the proportional-integral-derivative(PID)control algorithm were analyzed.Finally,using the mass flow rate of the humidifier as the control variable,ADRC and fuzzy ADRC algorithms were applied to regulate the humidity of the cathode and anode flow fields.The results show that,for an absolute current step amplitude of 50 A,the humidity overshoot in the cathode flow field decreases by 15.5%and 16.3%,respectively,while in the anode flow field both of them decrease by 70.3%,compared to PID control.For an absolute current step amplitude of 100 A,the humidity overshoot in the cathode flow field was reduced by 45.0%and 47.5%,and in the anode flow field by 92.3%and 92.4%,respectively.This study reveals the mechanism underlying humidity changes in high-power battery stacks and proposes a method to maintain water stability,thereby effectively mitigating issues of“water flooding”and“film drying”in battery stacks.

关 键 词：质子交换膜燃料电池(PEMFC) 湿度控制 比例-积分-微分(PID) 模糊自抗扰控制(ADRC) 

分 类 号：TM911.4[电气工程—电力电子与电力传动]