摘要
针对退役电池梯次利用筛选精度差、效率低的问题,提出一种基于神经网络-支持向量机-线性回归(multilayer perceptron-support vector regression-logistic regression,MLP-SVR-LR)混合模型的退役电池筛选方法,基于新的电压片段特征提取方法从恒流充电电压片段中提取与容量相关的特征,结合MLP-SVR-LR混合模型,实现高精度和高效率的退役电池筛选;同时,提出一种基于粒子群改进K-means算法和以轮廓系数(silhouette coefficient,SC)为标准的改进等数策略对筛选后的电池以容量和内阻为标准进行均分重组,实现退役电池直接成组利用。搭建磷酸铁锂电池仿真和实验平台,对所提电池筛选、重组策略进行实验和仿真分析。结果表明,所提方法较同类方法筛选精度提升2%以上,从退役电池筛选精度、筛选效率和重组后电池一致性的角度验证了所提方法的正确性和有效性。
Aiming at the problem of low screening accuracy and efficiency in the reused retired batteries,a retired battery screening method based on a MLP-SVR-LR hybrid model is proposed.Based on a new voltage segment feature extraction,the capacity-related features are obtained from the constant current charging voltage segments.Combined with the MLP-SVR-LR hybrid model,the highly-precised and highly-efficient screening of the retired batteries is achieved.Meanwhile,a particle swarm optimization-based K-means algorithm and an improved equal number strategy based on the Silhouette Coefficient(SC)are utilized to evenly recombine the screened batteries according to their capacities and internal resistances,achieving the direct group utilization of the retired batteries.A simulation and experimental platform for the lithium iron phosphate batteries is built to analyze the proposed battery screening and regrouping strategies.The results show that the proposed method improves the screening accuracy by more than 2%compared with the similar methods,verifying the correctness and effectiveness of the proposed strategies from the perspectives of retired battery screening accuracy,screening efficiency,and consistency of the recombined batteries.
作者
段双明
王恩吉
朱微
董鹏来
韩宇祺
常智博
DUAN Shuangming;WANG Enji;ZHU Wei;DONG Penglai;HAN Yuqi;CHANG Zhibo(Key Laboratory of Modern Power System Simulation and Control&Renewable Energy Technology,Ministry of Education(Northeast Electric Power University),Jilin 132012,Jilin Province,China;Jilin Power Supply Company,State Grid Jilin Electric Power Company,Jilin 132012,Jilin Province,China)
出处
《电网技术》
EI
CSCD
北大核心
2024年第10期4264-4274,共11页
Power System Technology
基金
自治区重点研发任务专项项目。
关键词
电压片段
梯次利用
退役电池
混合模型
等数策略
voltage segment
echelon utilization
decommissioned batteries
mixture model.
equal-number strategy
