产品安全和预警(18650EC)

Surpassingcustomer’sexpectationAmperexTechnologyLimitedSurpassingcustomer’sexpectationAmperexTechnologyLimited产品安全和预警(18650)Version:1stEditorPRJ:DengYaoPingCheckerPRJ:WuQJCheckerPROD:LiuJDate:2009-5-16ATLConfidentialSurpassingcustomer’sexpectationAmperexTechnologyLimitedSurpassingcustomer’sexpectationAmperexTechnologyLimited©2009AIT纪律宣讲敬禁静竞净Surpassingcustomer’sexpectationAmperexTechnologyLimitedSurpassingcustomer’sexpectationAmperexTechnologyLimited©2009AIT学习大纲1)目的2)对象3)范围4)内容5)研讨6)考核Surpassingcustomer’sexpectationAmperexTechnologyLimited©2009AIT学习目的1)操作工人技术化2)资格认证周期化3)制造知识系统化4)运作文件规范化Surpassingcustomer’sexpectationAmperexTechnologyLimitedSurpassingcustomer’sexpectationAmperexTechnologyLimited©2009AIT学习范围主题主要内容预备资格学习目标时间分配项目过程关键知识点知识关联掌握/熟悉/了解学习时长所以然其然基线目标2Surpassingcustomer’sexpectationAmperexTechnologyLimited©2009AIT学习内容-产品安全和预警主题主要内容预备资格学习目标时间分配项目过程关键知识点知识关联掌握/熟悉/了解学习时长(分钟)产品特性灰尘,毛刺,温湿度电芯工作原理掌握制造安全的电芯60应用环境见PS电芯正确使用基本知识了解正确使用10制造环境见MI生产流程掌握制造关键控制点10失效模式Cycle差,爆炸,电芯性能掌握10失效影响用电器不能工作电芯的功能掌握10预警流程磁铁吸附/化成sortingSPC基本知识掌握10教材内容包括但不限于以上所列。Surpassingcustomer’sexpectationAmperexTechnologyLimitedContentWhat’sCTQWhat’sCTSHowtocontrol影响电芯安全的最大三要素(除设计因素外)A.粉尘B.毛刺C.温湿度Surpassingcustomer’sexpectationAmperexTechnologyLimitedContentWhat’sCTQCriticaltoquality-品质关键点capacity,imp,K-value,CyclelifeHigh/LowTemperatureSurpassingcustomer’sexpectationAmperexTechnologyLimitedContentWhat’sCTSCriticaltosafety--安全关键点NailOverchargeOverdischargeExternalshort@High/RTHeatingSurpassingcustomer’sexpectationAmperexTechnologyLimitedContentHowtocontrolDesignProcess(man,machine,material,method,measurement,environment)这里只介绍工序上如何控制Surpassingcustomer’sexpectationAmperexTechnologyLimitedCellProfile钢壳电池属于压力容器，内有20~30kg压力，属危险产品，危及消费者的人身或财产安全，为最大限度减少recall,占领更大的市场，如何对工序进行控制，降低风险。18650EC,电芯直径:18.0mm,电芯高度:65.0mm,属于EnergyCell,阴极材料:锂镍钴锰,阳极材料:FSNCSurpassingcustomer’sexpectationAmperexTechnologyLimitedCellstructureCathode正极Separator隔离膜Anode负极Corecellafterwinding卷绕后的裸电芯Headgasket头部绝缘垫Bottomgasket底部绝缘垫Cap盖帽Canafterbeading滚槽后钢壳Can钢壳钢壳电池Electrolyte电解液Centerpin钢管Surpassingcustomer’sexpectationAmperexTechnologyLimitedMateriallistSurpassingcustomer’sexpectationAmperexTechnologyLimitedProcessFlowmixing—coating—slitting—tabwelding—winding—hi-pot—electrolyteinjection—formationSurpassingcustomer’sexpectationAmperexTechnologyLimitedMixingTank钢内壁金属材料的磨损脱落Impurity,筛网破损,锆铢进入浆料,使用“网格/磁铁/网格”过滤器来除铁,网格大小是浆料颗粒度的２倍FeContent,Cathode:120ppm,Anode:50ppmSEMFeFe:阴极样极粉料中的Fe含量，铁在化成时刻会溶解形成枝晶,导致短路,铁杂质在２ｐｐｍ以下Surpassingcustomer’sexpectationAmperexTechnologyLimitedCoatingHeadofthecoaterstructureCoaterstructureTensioncontrollerAirpumpTensioncontrollerCommabladeAirvalveSensoroflevelgroovecoaterBackrollerAircontrollerCommabladesensorSurpassingcustomer’sexpectationAmperexTechnologyLimitedCoatingMagnetwasinstalledtomixslurry(8000Gs;Cleanpershift)MetalrollerwasfixedtoavoidmetallicparticlegenerationSurpassingcustomer’sexpectationAmperexTechnologyLimitedCoating阴极头部山峰,破坏cell,极片脆厚度、重量波动大于4%阴极严格控制拖尾异常Surpassingcustomer’sexpectationAmperexTechnologyLimitedCalendaringTworowsmagnet(8000Gs,cleanpershift)FeedingColdpressingUnloadingVacuumcleanerandBrush(Cleanpershift)极片脆，已断阳极极片A/B面接反Surpassingcustomer’sexpectationAmperexTechnologyLimitedCalendaring压滚上有异物Surpassingcustomer’sexpectationAmperexTechnologyLimitedSlittingVacuumcleanerandBrush(Cleanpershift)分条时,影响电芯安全的主要因数是毛刺。Surpassingcustomer’sexpectationAmperexTechnologyLimitedSlitting金属颗粒Surpassingcustomer’sexpectationAmperexTechnologyLimitedTabWelding&windingSurpassingcustomer’sexpectationAmperexTechnologyLimitedCaninsertion漏底绝缘片隔离膜破损Hi-pot—放底部绝缘片—入壳—扩孔—点底焊—放顶部绝缘片—插centerpin—滚槽—吸金属屑（其中，插centerpin、滚槽三个工序顺序可以颠倒）CenterPin的作用:1起支撑作用，防止电芯变形；2电池内部产生大量气体时，centerpin提供通道，便于气体疏散。Surpassingcustomer’sexpectationAmperexTechnologyLimitedCanBeading拉伸不均匀,造成薄弱区域,易破损滚槽的目的:安装盖帽滚槽需要控制：A．镀层金脱落,真空吸或磁铁吸Ｂ．下高超下限,钢壳压阳极铜箔Ｃ．槽口波浪纹Ｄ．槽位破损Surpassingcustomer’sexpectationAmperexTechnologyLimitedProblemsCandamageatBeadingSurpassingcustomer’sexpectationAmperexTechnologyLimitedGrooving---DWG滚槽深度：目前通过测试内径来计算，它决定了封口时能否良好地支撑GasketSurpassingcustomer’sexpectationAmperexTechnologyLimitedBaking水气超标200PPM化成前为什么要对电芯进行高温baking使电解液充分、均匀浸润Surpassingcustomer’sexpectationAmperexTechnologyLimitedInjection灌注量精度Surpassingcustomer’sexpectationAmperexTechnologyLimitedCapassembly金属屑/变形18650的盖帽五组件:顶盖、vent（防爆片）、PTC(镍片)、CID、胶圈（gasket）PTC：正温度系数元件PTC随温度的升高内阻迅速增大，可有效减小电流，从而可避免电池温度急剧升高而燃烧Surpassingcustomer’sexpectationAmperexTechnologyLimitedCIDwelding焊接虚焊TAB长度过长，折TAB接触钢壳内壁焊锡飞溅Surpassingcustomer’sexpectationAmperexTechnologyLimitedCrimping密封不严密封变形高度超规格M6C工艺有没有degassing这道工序M6C中需要有一定的气体，在电池出现问题时可以有足够气体冲开vent使电池断路，保证电池的安全性。Surpassingcustomer’sexpectationAmperexTechnologyLimitedCrimping一封40C二封40C三封30C分三步实现卷边封口Surpassingcustomer’sexpectationAmperexTechnologyLimitedCrosssectionPoorcrimpingleadtoVENTandCIDdeformationGoodCrimpingVENTandCIDnodeformationSurpassingcustomer’sexpectationAmperexTechnologyLimitedCleaningAnti-rustSurpassingcustomer’sexpectationAmperexTechnologyLimitedPlasticSleevesInsertion高度超规