装备环境工程
裝備環境工程
장비배경공정
EQUIPMENT ENVIRONMENTAL ENGINEERING
2013年
2期
30-33
,共4页
锂离子电池%FMEA%容量衰减%加速退化试验%巴特利特检验统计量
鋰離子電池%FMEA%容量衰減%加速退化試驗%巴特利特檢驗統計量
리리자전지%FMEA%용량쇠감%가속퇴화시험%파특리특검험통계량
Li-ion cell%FMEA%capacity reduction%accelerated degradation test%Bartlett statistic
针对锂离子电池长寿命、高可靠的特点,提出了使用恒定应力加速退化试验对其进行可靠性评估与寿命预测的方法.首先对锂离子电池进行FMEA分析,得出容量衰减是最常见的失效模式,并以温度作为主要的加速应力.其次,确定锂离子电池的加速退化模型和参数退化轨迹模型,并进行锂离子电池的加速退化试验设计.确定加速应力水平时,在锂离子电池参数退化轨迹的基础上,根据巴特利特检验统计量确定退化机理一致的边界应力.最后,基于伪寿命对锂离子电池的可靠性进行评估.
針對鋰離子電池長壽命、高可靠的特點,提齣瞭使用恆定應力加速退化試驗對其進行可靠性評估與壽命預測的方法.首先對鋰離子電池進行FMEA分析,得齣容量衰減是最常見的失效模式,併以溫度作為主要的加速應力.其次,確定鋰離子電池的加速退化模型和參數退化軌跡模型,併進行鋰離子電池的加速退化試驗設計.確定加速應力水平時,在鋰離子電池參數退化軌跡的基礎上,根據巴特利特檢驗統計量確定退化機理一緻的邊界應力.最後,基于偽壽命對鋰離子電池的可靠性進行評估.
침대리리자전지장수명、고가고적특점,제출료사용항정응력가속퇴화시험대기진행가고성평고여수명예측적방법.수선대리리자전지진행FMEA분석,득출용량쇠감시최상견적실효모식,병이온도작위주요적가속응력.기차,학정리리자전지적가속퇴화모형화삼수퇴화궤적모형,병진행리리자전지적가속퇴화시험설계.학정가속응력수평시,재리리자전지삼수퇴화궤적적기출상,근거파특리특검험통계량학정퇴화궤리일치적변계응력.최후,기우위수명대리리자전지적가고성진행평고.
@@@@According to the characteristics of long life, high reliability of Li-ion cell, a constant stress accelerated degradation test method was put forward to accesses reliability and predicts life time of Li-ion cell. FMEA analysis was carried out on Li-ion cell regarding capacity reduction as the most common failure mode and using temperature as the most important accelerated stress. The accelerated degradation models and parameters of the degradation path model of Li-ion cell were determined and the accelerated degradation test of Li-ion cell was designed. Degradation mechanism consistency boundary was determined by the Bartlett statistic based on parameter degeneration path and the determined accelerated stress level. The reliability of Li-ion cell was accessed based on pseudo life.