比亚迪老款E5磷酸铁锂动力电池不均衡故障的研究

中图分类号：U463.633 文献标识码：B 文章编号：1003-8639(2025)06-0185-02

Research on the Unbalanced Fault of BYD's Old E5 Lithium Iron Phosphate Power Battery

Li Guiqiang，Lv jie（BeihaiVocational College，Beihai ，China）

【Abstract】This paper focuses on the unbalanced fault of BYD'sold E5 lithium iron phosphate power battery，and analyzes thatthecorecauseis the inconsistencyof individualcelscaused byproductionprocesserorsandmaterial characteristicdiferences，which isexacerbatedbythe influenceof charginganddischarging，temperatureand humidity environment，and working conditions.A diagnosticsystem basedon BMS data monitoring，professional equipment testing (such asbattery testersand multimeters），and fault code analysis hasbeen constructed.Active balancing (energy transfer）and passive balancing（energy dissipation）technologies have been proposed，as wellas batry cells BMS、 Repair andreplacement plan forconnecting lines.Theresearch pointsout thatthereal-time diagnosisand equipment popularizationneedtobeimproved.Inthefutue，intellgenttechnologyneeds tobeintegrated，effcientandbalanced solutionsneed tobedeveloped，andnewbattery maintenancestandards need tobe improved to ensure thesafe and reliable operation of new energy vehicles.

【Keywords】power battery；battery unbalanced；fault

动力电池作为新能源汽车核心部件，其性能和安全性备受关注。（剩余2977字）