氢燃料电池绝缘特性及绝缘防护方案分析  

Analysis on Insulation Characteristics and Insulation Protection Scheme of Hydrogen Fuel Cell

作　　者：王博 李剑铮 何炎迎 吴广权 占文锋 WANG Bo;LI Jianzheng;HE Yanying;WU Guangquan;ZHAN Wenfeng(Automotive Engineering Research Institute,Guangzhou Automobile Group Company Limited,Guangzhou 511434,China)

机构地区：[1]广州汽车集团股份有限公司汽车工程研究院,广东广州511434

出　　处：《汽车实用技术》2024年第1期7-12,共6页Automobile Applied Technology

摘　　要：氢燃料电池的绝缘值受冷却液电导率影响,在运行过程中绝缘值会持续下降直至导致发生绝缘故障。为降低绝缘故障发生频率,文章从绝缘要求及检测原理出发,讨论并分析了冷却液电导率对燃料电池绝缘的影响原理。通过实车静态测试及整车耐久数据采集等方式,对冷却液电导率与累积行驶里程关系、车辆绝缘值关系分别做了量化测试,进而提出了一种绝缘防护的方案,并在燃料电池示范运行车上进行实车运行验证。结果表明,绝缘防护方案可有效避免车辆运行中绝缘故障的发生。The insulation value of hydrogen fuel cell is affected by the coolant conductivity,and the insulation value will continue to decrease during operation until the insulation failure occurs.In order to reduce the frequency of insulation failure,this paper discusses and analyzes the principle of influence of coolant conductivity on fuel cell insulation based on insulation requirements and detection principle.The relationship between coolant conductivity and accumulated mileage and vehicle insulation value are quantitatively tested by means of static test and vehicle durability data acquisition,and then a insulation protection scheme is proposed,which is verified by real vehicle operation on the fuel cell demonstration vehicle.The results show that the insulation protection scheme can effectively avoid the occurrence of insulation faults in vehicle operation.

关 键 词：氢燃料电池 绝缘检测 绝缘防护 冷却液电导率 

分 类 号：U469.7[机械工程—车辆工程] TM911[交通运输工程—载运工具运用工程]