The invention discloses a power battery health state evaluation method based on a new energy automobile real vehicle working condition, and relates to the technical field of automobile batteries. S1, determining health state attenuation coefficients alpha corresponding to different working condition intervals; s2, calculating the characteristic parameters of the real vehicle working condition of the new energy vehicle; s3, constructing characteristic parameter vectors of real vehicle working conditions, and calculating a characteristic parameter vector similarity matrix; s4, real vehicle working condition classification; according to the similarity matrix, dividing all the new energy vehicles into a plurality of real vehicle working condition categories by using a spectral clustering algorithm; s5, sampling and testing the available capacity of the power battery of each real vehicle working condition category; s6, evaluating a classification effect; s7, evaluating the health state values of the power batteries of different real vehicle working condition categories; and the health state value of the power battery of each real vehicle working condition category is evaluated through a point estimation method and an interval estimation method. According to the method, the real vehicle working conditions of the new energy vehicle are divided into a plurality of categories, and the health state of the power battery of each category is evaluated.
本发明公开了基于新能源汽车实车工况的动力电池健康状态评估方法,涉及汽车电池技术领域。S1:确定不同工况区间对应的健康状态衰减系数α;S2:新能源汽车实车工况特征参数的计算;S3:构建实车工况的特征参数向量,并计算特征参数向量相似度矩阵;S4:实车工况分类;根据相似度矩阵,使用谱聚类算法将所有的新能源汽车分为若干个实车工况类别;S5:抽样测试每种实车工况类别的动力电池可用容量;S6:分类效果的评价;S7:评估不同实车工况类别的动力电池健康状态数值;每种实车工况类别的动力电池健康状态数值通过点估计和区间估计两种方法进行评估。本发明专利将新能源汽车实车工况分为了若干类别,并评估了每种类别的动力电池健康状态。
Power battery health state evaluation method based on real vehicle working condition of new energy vehicle
基于新能源汽车实车工况的动力电池健康状态评估方法
2024-03-26
Patent
Elektronische Ressource
Chinesisch
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