新能源汽车的动力电池压差故障诊断与维修技术

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中图分类号：U469.72 文献标识码：B 文章编号：1003-8639（2026）01-0180-03

Differential Pressure Fault Diagnosis and Maintenance Technology for Power Batteries of New Energy Vehicles

Ding Hongwei,Wang Song (Dali Vocational and Technical College of Agriculture and Forestry,Dali 671oO3,China)

【Abstract】This study based on data acquisition technology and balanced control strategies,focuses on the research of diagnostic methods and maintenance techniques for single-cellpressure difference faults in new energy vehicle power bateries,with aparticular emphasisonanalyzing thecauses,impacts,and handling strategiesof pressure difference faults.Byusing high-precision sensors to monitorthe real-time voltage information of individual cells, combined with passveresistance balancing andactivecapacitancebalancing methods,theconsistencylevel of the battery pack can be improved.Research has found that diffrential pressure faults are mainly caused bydiffrences inthe aging rate of baterycels,uneven temperaturedistribution,anddeviation inthestateofcharge,resultinginadecrease in the availablecapacityof thebaterypack,anincrease intheriskof thermalrunaway,andashortenedcycle life.Forlithium iron phosphate bateries,a balanced replenishment repair plan is proposed,while for ternary lithiumbatteries,direct replacement is recommended.The research results provide technical supportforthe precise maintenance of power baery systems,reduce the occurrence offailures, extend battery life,and improve overall vehicle performance.

【Key words 】 new energy vehicles;power battery; power supply system; diagnosisand maintenance

0 引言

随着全球新能源汽车产业的快速扩张，动力电池作为核心动力源，其性能稳定性直接决定整车运行质量。（剩余4527字）