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2019款比亚迪秦EV故障诊断流程与排故思路

2025-07-13张欢孙洪亮

汽车电器 2025年6期
关键词:钥匙故障

中图分类号:U463.6 文献标识码:B 文章编号:1003-8639(2025)06-0171-03

2019BYDQin EV Fault Diagnosis Processand TroubleshootingIdeas

Zhang Huan1,Sun Hongliang²

(1.School of Automotive Engineering,Shandong Yellow River Water Conservancy Senior Technical School,Jinan 250220,China;2.School of Automotive Engineering,Jinan Polytechnicof Engineering,Jinan 2502O0,China)

【Abstract】This paper starts with introducing the research results of domestic scholars in the field of fault diagnosis andelimination of new energyvehicles,and takes 2O19 BYDQinEVas the specificresearch objectto deeplyanalyze thediagnosisand elimination methodsofcommon typicalfaultssuchasfailure to turnonlow-voltageelectricity,failure toturnonhigh-voltageelectricity,andfailure tochargenormaly.Throughseveralactualfaultcases,asetofeffective diagnosis processissummarized:first,carefullyobserve thefault phenomenon;Secondly,combinedwith thecircuit diagram,thefaultcausesareanalyzed deply.Finall,thefault pointandfaulttypeareaccuratelyidentifiedwith the help ofspecific detectionsteps.Thediagnosticprocess and troubleshoting ideasare feasible,whichisof great significance to promote the professional development of the new energy vehicle maintenance industry.

【Key Words】 new energy vehicles;BYD Qin EV;fault diagnosis;troubleshooting

0 引言

随着新能源汽车技术的发展,国内外众多学者投身于新能源汽车故障诊断与排除方法的研究。国内学者梁力艳以2019款比亚迪秦EV为研究对象,对智能钥匙模块搭铁点虚接故障展开研究。该故障致使车辆无钥匙进入功能失效,无法正常解锁。通过使用跨接线,重新连接智能钥匙模块搭铁点,成功排除故障。李杰针对2023款比亚迪秦EV,分析了蓄电池电量不足、智能钥匙模块供电熔断丝F2/46熔断、启动子网CAN-H断路等一系列故障,并通过更换熔断丝、继电器及相关线束等操作排除故障。校金龙以比亚迪秦EV为例,阐述了CAN总线的工作原理、故障类型,以及启动子网CAN和动力CAN的故障现象与形式。梁力艳再次以2019款比亚迪秦EV为样本,研究了电池管理器B双电路中常电部分熔断丝F1/4熔断故障,该故障导致车辆无法上高压电,通过更换熔断丝排除了故障。颜宇针对2019款比亚迪秦EV,研究了充电控制确认信号CP线路虚接故障,通过更换线束排除故障,使车辆恢复正常充电功能。李钰珑以2024年广西省职业院校技能大赛中的故障案例为依托,对启动子网CAN-H和CAN-L反接、制动开关与车辆控制模块BCM之间线路虚接等故障的排故流程进行了阐述。

1常见典型故障

1.1 无法上低压电故障

1.1.1 智能钥匙模块搭铁点脱落

1)故障现象描述: ① 遥控无法正常解锁; ② 无钥匙无法正常进入,且当按下微动开关时,钥匙示灯仅闪烁,车门无法正常解锁; ③ 车内门锁正常,车辆无法正常上低压电。……

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