CAJ | 학술논문

以某锰酸锂锂离子动力电池为例,研究了利用性能退化数据进行动力电池寿命预测的方法.研究发现该电池容量基本符合幂函数的衰退轨迹,利用该衰退模型外推了电池伪失效寿命;对伪失效寿命的分布进行了研究,结果威布尔分布的拟合效果最好,基于威布尔寿命分布对该电池的可靠性进行了评估.分析了用于寿命预测的实际循环数据的多少对预测精度的影响.该寿命模型和可靠性评定方法具有较高的精度,解决了动力电池寿命评估周期长和成本高的问题.
이모맹산리리리자동력전지위례,연구료이용성능퇴화수거진행동력전지수명예측적방법.연구발현해전지용량기본부합멱함수적쇠퇴궤적,이용해쇠퇴모형외추료전지위실효수명;대위실효수명적분포진행료연구,결과위포이분포적의합효과최호,기우위포이수명분포대해전지적가고성진행료평고.분석료용우수명예측적실제순배수거적다소대예측정도적영향.해수명모형화가고성평정방법구유교고적정도,해결료동력전지수명평고주기장화성본고적문제.
The prediction method for battery cycle life of a commercialized cell with LiMn_2O_4/Graphite cell system using performance degradation data was proposed.The capacity fade with cycle number followed a power function path.The possible cycle life was extrapolated which proved that the cycle life fitted the weibull distribution well,the distribution parameters were estimated and the battery reliability was evaluated.The effect of the cycle number on the predicting precision was studied and an iterative method was developed in order to improve the prediction.The cycle life model and reliability evaluation method with high precision shortens the prediction period of battery life and cut the prediction cost.