汽车工程 ›› 2024, Vol. 46 ›› Issue (2): 269-280.doi: 10.19562/j.chinasae.qcgc.2024.02.009
收稿日期:
2023-07-02
修回日期:
2023-07-30
出版日期:
2024-02-25
发布日期:
2024-02-23
通讯作者:
魏学哲
E-mail:weixzh@tongji.edu.cn
基金资助:
A’ bang Tao1,2,Jianjian Tao1,2,Xuezhe Wei1,2()
Received:
2023-07-02
Revised:
2023-07-30
Online:
2024-02-25
Published:
2024-02-23
Contact:
Xuezhe Wei
E-mail:weixzh@tongji.edu.cn
摘要:
为优化质子交换膜燃料电池(PEMFC)冷启动过程,提供足量的反馈数据十分必要,常见的阻抗谱和等效电路因其获取周期较长,无法提供足量且实时的反馈。为此,本文在COMSOL中建立冷启动阻抗模型,结合试验分析其阻抗谱变化,分别在高、中、低频区间提出特征频率1 kHz、50 Hz和1 Hz用于表征燃料电池冷启动过程。研究发现,上述特征频率在冷启动的前、中、后3个阶段变化显著,在特征频率1 kHz、50 Hz和1 Hz下阻抗的变化倍率分别为0.38、0.31和1.47。相较于获取完整的阻抗谱和拟合等效电路,在保留了特征信息的情况下提高了采集数据的实时性。因此,可利用特征频率点的阻抗表征冷启动过程,为实时监测冷启动内部状态提供条件。
陶阿邦,陶建建,魏学哲. PEMFC冷启动过程阻抗谱及特征频率分析[J]. 汽车工程, 2024, 46(2): 269-280.
A’ bang Tao,Jianjian Tao,Xuezhe Wei. Impedance Spectroscopy and Characteristic Frequency Analysis of the PEMFC Cold Start Process[J]. Automotive Engineering, 2024, 46(2): 269-280.
表7
高、中、低频区间各频率点变化倍率仿真结果"
频率区间 | 方差 | 倍率/ 频率点 | 倍率/ 频率点 | 倍率/ 频率点 | 倍率/ 频率点 | 倍率/ 频率点 | 倍率/ 频率点 | 倍率/ 频率点 | 倍率/ 频率点 | 倍率/ 频率点 | 倍率/ 频率点 | 倍率/ 频率点 | 倍率/ 频率点 | 倍率/ 频率点 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
高频区间 | 7.78×10-4 | 0.39/ 10 kHz | 0.40/ 8 kHz | 0.40/ 5 kHz | 0.41/ 4 kHz | 0.42/ 2.5 kHz | 0.42/ 2 kHz | 0.43/ 1.6 kHz | 0.44/ 1.25 kHz | 0.44/ 1 kHz | 0.45/ 800 Hz | 0.46/ 500 Hz | 0.47/ 400 Hz | 0.48/ 250 Hz |
中频区间 | 3.56×10-4 | 0.49/ 200 Hz | 0.50/ 160 Hz | 0.51/ 125 Hz | 0.51/ 100 Hz | 0.52/ 80 Hz | 0.51/ 50 Hz | 0.51/ 40 Hz | 0.51/ 25 Hz | 0.52/ 20 Hz | 0.57/ 16 Hz | |||
低频区间 | 0.02 | 0.97/ 10 Hz | 0.99/ 8 Hz | 1.05/ 5 Hz | 1.07/ 4 Hz | 1.15/ 2 Hz | 1.22/ 1 Hz | 1.28/ 0.8 Hz | 1.41/ 0.5 Hz |
表8
高、中、低频区间各频率点变化倍率试验结果"
频率区间 | 方差 | 倍率/ 频率点 | 倍率/ 频率点 | 倍率/ 频率点 | 倍率/ 频率点 | 倍率/ 频率点 | 倍率/ 频率点 | 倍率/ 频率点 | 倍率/ 频率点 | 倍率/ 频率点 | 倍率/ 频率点 | 倍率/ 频率点 | 倍率/ 频率点 | 倍率/ 频率点 | 倍率/ 频率点 | 倍率/ 频率点 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
高频区间 | 1.84×10-3 | 0.25/ 10 kHz | 0.26/ 8 kHz | 0.26/ 6 kHz | 0.28/ 5 kHz | 0.30/ 4 kHz | 0.36/ 2.5 kHz | 0.38/ 1 kHz | 0.36/ 796 Hz | 0.32/ 505 Hz | 0.30/ 315 Hz | 0.30/ 198 Hz | ||||
中频区间 | 3.19×10-4 | 0.30/ 158 Hz | 0.30/ 125 Hz | 0.30/ 100 Hz | 0.31/ 79 Hz | 0.31/ 63 Hz | 0.31/ 50 Hz | 0.31/ 38 Hz | 0.32/ 31 Hz | 0.32/ 24 Hz | 0.33/ 19 Hz | 0.35/ 15 Hz | 0.36/ 12 Hz | |||
低频区间 | 0.65 | 0.67/ 10 Hz | 0.69/ 8 Hz | 0.71/ 6.3 Hz | 0.74/ 5 Hz | 0.78/ 4 Hz | 0.84/ 3.2 Hz | 0.87/ 2.5 Hz | 0.97/ 2 Hz | 1.09/ 1.6 Hz | 1.26/ 1.3 Hz | 1.47/ 1 Hz | 1.74/ 0.8 Hz | 2.06/ 0.6 Hz | 2.57/ 0.5 Hz | 3.57/ 0.4 Hz |
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