电池失效分析.ppt

5/1/2020,LishenBatteryJoint-StockCo.,Ltd.ProprietyConfidentialAttorneyClientPrivilegedCommunication,1,电池失效分析,Dec.2008,TianjinLishenBatteryJoint-stockCo.,Ltd,5/1/2020,LishenBatteryJoint-StockCo.,Ltd.ProprietyConfidentialAttorneyClientPrivilegedCommunication,2,目录一:8D分析方法二:锂离子电池常见失效模式三:关键控制参数四:失效模式分析五:与安全相关的要求,5/1/2020,LishenBatteryJoint-StockCo.,Ltd.ProprietyConfidentialAttorneyClientPrivilegedCommunication,3,一:8D分析方法,1.主题-ConcernTitle小组建立-TeamCrossfunction问题描述-ProblemdescriptionWhatswrongwithwhat?4.临时措施-ContainmentactionEmergencyresponseactiontoprotectcustomer措施验证-Verificationofcontainmentactionproveyourcontainmentactioniseffective.6.原因分析-Rootcauseanalysis3whyFishbone重现性实验-simulationtestingtorecurthedefects改善措施-PermanentCorrectiveAction改善效果验证-VerificationofCorrectiveActionEffectiveness10.防止再次发生-ActionsTakentoPreventRecurrenceDocument(Dfmea/PfmeaCPWI)11.庆祝-Congratulation,5/1/2020,LishenBatteryJoint-StockCo.,Ltd.ProprietyConfidentialAttorneyClientPrivilegedCommunication,4,二.锂离子电池常见失效模式,电池失效,电压低,内阻大,容量低,安全,漏液,其他,循环差,鼓胀(方/聚),自放电负载漏电流短路充电不足-,焊接导电剂接触(腐蚀)电液-,涂敷量温度电阻-,过充短路过热挤压-,焊接注液孔密封件-,焊接注液孔密封件-,受热气胀循环-,电液电极温度循环条件-,-,5/1/2020,LishenBatteryJoint-StockCo.,Ltd.ProprietyConfidentialAttorneyClientPrivilegedCommunication,5,三:关键控制参数,粉浆,材料,配比,黏度,固含量,除铁,涂敷,涂敷量,颗粒度,速度,温度,间隔,长度,对齐度,涂敷突起,基体,碾压,碾压密度,平整度,厚度,反弹率,剪切,毛刺,收卷对齐度,宽度,电极制造:,Lamination:覆盖涂敷宽度,5/1/2020,LishenBatteryJoint-StockCo.,Ltd.ProprietyConfidentialAttorneyClientPrivilegedCommunication,6,三:关键控制参数,极片烘干,温度,气压,时间,极片反弹,极耳焊接,焊接拉力,极耳胶带,卷绕,对齐度,毛刺,张力,粉尘,极片插入/收尾位置,掉粉,极组卷绕:,5/1/2020,LishenBatteryJoint-StockCo.,Ltd.ProprietyConfidentialAttorneyClientPrivilegedCommunication,7,三:关键控制参数,压极组,压力,温度,时间,均一性,极组厚度,异物,包胶带,胶带长度,胶带性能,入壳,极组入壳比,入壳挫伤,极耳焊接,拉力,位置,虚焊,异物,装配工序:,5/1/2020,LishenBatteryJoint-StockCo.,Ltd.ProprietyConfidentialAttorneyClientPrivilegedCommunication,8,三:关键控制参数,弯极耳,间距,角度,形状,扣盖,极耳变形,上垫片挤压,离心入壳,极耳变形,角度,周边焊接,隔膜烫伤,焊接强度,焊接裂缝,异物,装配工序:,5/1/2020,LishenBatteryJoint-StockCo.,Ltd.ProprietyConfidentialAttorneyClientPrivilegedCommunication,9,三:关键控制参数,烘极组,时间,温度,气压,水份含量,隔膜状态,注液,温度,湿度,注液量,静置时间,预化成,电流,电压,时间,封球,球径,压力,球材质,装配工序:,5/1/2020,LishenBatteryJoint-StockCo.,Ltd.ProprietyConfidentialAttorneyClientPrivilegedCommunication,10,三:关键控制参数,化成,电流,电压,时间,老化,温度,静置时间,后处理,筛选电压,电流,电压,温度,设备精度,分选,短路,厚度,富裕量(Margin),化成/后处理工序:,5/1/2020,LishenBatteryJoint-StockCo.,Ltd.ProprietyConfidentialAttorneyClientPrivilegedCommunication,11,三:关键控制参数,焊接,电流,时间,夹具,PTC,关断温度,结构强度,PCM,性能,焊接,触点,注塑,温度,溢胶,少胶,Pack:,贴纸,外观,水贴纸,安全阀变形,5/1/2020,LishenBatteryJoint-StockCo.,Ltd.ProprietyConfidentialAttorneyClientPrivilegedCommunication,12,四:失效模式分析,低电压:1.自放电2.负载放电3.充电不足4.接触不良可能的原因:,5/1/2020,LishenBatteryJoint-StockCo.,Ltd.ProprietyConfidentialAttorneyClientPrivilegedCommunication,13,四:失效模式分析,高内阻:1.焊接不良2.过放电3.外短路(受热)4.接触不良可能的原因:,5/1/2020,LishenBatteryJoint-StockCo.,Ltd.ProprietyConfidentialAttorneyClientPrivilegedCommunication,14,四:失效模式分析,安全1.内短路2.过充电3.热冲击4.充电时接电话可能的原因:,5/1/2020,LishenBatteryJoint-StockCo.,Ltd.ProprietyConfidentialAttorneyClientPrivilegedCommunication,15,五:与安全相关的