强化道路振动谱影响下的燃料电池电性能与气密性衰减规律  

Fuel cell electric performance and gas tightness attenuation under influence of enhanced road vibration spectrum

作　　者：裴冯来 欧阳云瀚 PEI Fenglai;OUYANG Yunhan(Shanghai Motor Vehicle Inspection Certification&Tech Innovation Center Co.Ltd.,Shanghai 201805,China)

机构地区：[1]上海机动车检测认证技术研究中心有限公司,上海201805

出　　处：《储能科学与技术》2021年第2期714-721,共8页Energy Storage Science and Technology

基　　金：国家重点研发计划项目子课题(2018YFB0105304);上海科委科研计划项目(17DZ1200700)。

摘　　要：车用燃料电池的耐久可靠性是制约商用燃料电池发展的关键问题之一。当前的燃料电池振动试验多借鉴动力电池振动谱,对燃料电池影响研究不匹配,需要分析燃料电池影响机理及设计新的试验方案。本文通过平滑及劣化处理,将典型的整车行驶工况转化振动台架加载功率密度谱。选取典型商用燃料电池电堆,进行强化振动测试。选取影响显著方向,通过270 h耐久测试模拟30000 km实车运行工况影响。试验中,通过噪声仪确认了减振器对台架振动加速度的放大作用。试验后,通过极化曲线测试、气密性测试等性能表征方法,分析了燃料电池电性能及密封性变化规律。研究表明长时间的耐久性振动使得燃料电池堆的电性能出现明显的下降,且会导致燃料电池堆内部的质子交换膜及外部的壳体封装出现不同程度的衰减。The durability and reliability of vehicle fuel cells are key problems restricting the development of commercial fuel cells.Mostly,current fuel cell vibration tests refer to the vibrational spectrum of power batteries,which does not match those of fuel cell influence studies.Its influence mechanism is analyzed,and a novel testing program is designed.In this paper,the power density spectrum of a vibration bench is converted from a typical vehicle driving cycle through smoothing and degradation treatment.An intensified vibration test proceeded using a typical fuel cell stack.By choosing the remarkable influence direction,a 270 h endurance test is done to simulate the impact of a 30000 km actual drive cycle.During the test,an acoustic meter is used to confirm the amplifying effect of the shock absorber on vibration acceleration.After the test,the variation law of fuel cell electrical performance and the sealing property were analyzed through a polarization curve test,airtightness test,and other performance characterization methods.The research shows that long-term durability vibration attenuates fuel cell electrical performance.The inside proton exchange membrane and outer shell package of fuel cell decay to different degrees as well.

关 键 词：燃料电池 强化振动谱 性能衰减 气密性衰减 

分 类 号：TM911.42[电气工程—电力电子与电力传动]