基于I-V曲线的PEMFC膜电极衰退指标非线性最小二乘拟合方法

吴凡; 余婉秋; 王林辉; 王雅东; 徐佳宇; 詹志刚

doi:10.19912/j.0254-0096.tynxb.2025-0653

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基于I-V曲线的PEMFC膜电极衰退指标非线性最小二乘拟合方法

更新时间：2026-10-15

- 基于I-V曲线的PEMFC膜电极衰退指标非线性最小二乘拟合方法
- 基于I-V曲线的PEMFC膜电极衰退指标非线性最小二乘拟合方法
- 太阳能学报 2026年47卷第9期页码：107-113
- 作者机构：
- 作者简介：
- 基金信息：
  
  国家自然科学基金（22179103;21676207）;国家重点研发计划（2023YFB4005804）;湖北省重点研发计划（2023BAB147）
- DOI：10.19912/j.0254-0096.tynxb.2025-0653
  中图分类号： TM911
- 网络首发：2026-10-10，
  
  纸质出版：2026
- 稿件说明：
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吴凡, 余婉秋, 王林辉, 等. 基于I-V曲线的PEMFC膜电极衰退指标非线性最小二乘拟合方法[J]. 太阳能学报, 2026,47(9):107-113.

吴凡, 余婉秋, 王林辉, et al. 基于I-V曲线的PEMFC膜电极衰退指标非线性最小二乘拟合方法[J]. 2026, 47(9): 107-113.
吴凡, 余婉秋, 王林辉, 等. 基于I-V曲线的PEMFC膜电极衰退指标非线性最小二乘拟合方法[J]. 太阳能学报, 2026,47(9):107-113. DOI： 10.19912/j.0254-0096.tynxb.2025-0653.

吴凡, 余婉秋, 王林辉, et al. 基于I-V曲线的PEMFC膜电极衰退指标非线性最小二乘拟合方法[J]. 2026, 47(9): 107-113. DOI： 10.19912/j.0254-0096.tynxb.2025-0653.

摘要

提出一种基于I-V曲线的质子交换膜燃料电池（PEMFC）膜电极（MEA）衰退指标非线性分析方法

以满足PEMFC健康状态监测的需求。该方法可在无需额外电化学测试的情况下

通过最小二乘逼近法实时提取电池关键性能参数

包括电化学活性面积（SECSA）、氢气渗透电流（iH2）、极限电流（ilim）与高频电阻（RHFR）等。基于0~6000 h单电池运行实验数据进行分析

验证方法的可行性与有效性。结果表明

在0~4000 h阶段

该方法具有较高拟合精度

但在5000~6000 h

由于膜材料的衰退加剧与测试时间差

iH2的拟合误差较大

但该方法可在实际应用中实时获取MEA的衰退状态。

Abstract

A nonlinear analysis method based on - curves is proposed to assess membrane electrode assembly （MEA） degradation in a proton exchange membrane fuel cell （PEMFC）

aiming to meet the growing demand for health monitoring. This method enables real-time extraction of key performance parameters-electrochemically active surface area （）

hydrogen crossover current （）

limiting current （）

and high-frequency resistance （）—without additional electrochemical tests. By employing a nonlinear least squares fitting method

the degradation parameters are identified directly from curve data. The feasibility and effectiveness of the proposed method are validated using the data from a single-cell PEMFC tested over 6000 hours. During the 04000 h period

the model shows high fitting accuracy

while during the 50006000 h period

intensified membrane degradation and measurement time lag lead to an increased fitting error in . Despite this

the method remains effective for real-time evaluation of MEA degradation in practical PEMFC applications

and can be extended to evaluate single cells in a stack

thereby enabling online testing and assessment of the overall stack health condition.

关键词

Keywords

references

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