摘要
针对现阶段退役动力电池筛选效率低、能耗大和成组率低等问题,提出了一种基于短时脉冲放电与电化学阻抗谱(EIS)相结合的退役动力电池快速分选与重组方法。通过对200节同类型不同批次的退役磷酸铁锂动力电池进行短时脉冲放电与阻抗谱测试和分析后,将获取的脉冲电压差、直流内阻、EIS曲线形状特征以及EIS等效电路模型参数作为筛选指标并建立数学模型,实现了对退役动力电池快速有效的分选与重组。验证实验结果表明:该方法能有效地降低能耗,且单节电芯的平均测试时间短至20 min以内,同时成组后的模组一致性指标较好,在工程上具有较大的实用价值。
At present,the decommissioned power batteries have problems of low screening efficiency,high energy consumption and low grouping rate.To address these issues,a fast screening and recombinant method is proposed,which is based on short-time pulse discharge and electrochemical impedance spectroscopy(EIS)for decommissioned power batteries.Through the short-time pulse discharge,EIS test and analysis of 200 decommissioned lithium iron phosphate power batteries of the same type and different batches,the obtained pulse voltage difference,DC internal resistance,EIS curve shape characteristics and EIS equivalent circuit model parameters are taken as screening indicators.Then,a mathematical model is formulated to realize the rapid and effective sorting and reorganization of decommissioned power batteries.Experimental results show that this method can effectively reduce energy consumption.The average test time of a single cell is less than 20 min.Meanwhile,the module consistency index after grouping is good,which has great practical value in engineering.
作者
骆凡
黄海宏
王海欣
Luo Fan;Huang Haihong;Wang Haixin(School of Electrical Engineering and Automation,Hefei University of Technology,Hefei 230009,China)
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2022年第1期229-238,共10页
Chinese Journal of Scientific Instrument
基金
安徽省科技重大专项项目(18030901064)资助
关键词
退役动力电池
电化学阻抗谱
等效电路模型
短时脉冲放电
快速分选
重组
decommissioned power battery
electrochemical impedance spectroscopy
equivalent circuit model
short-time pulse discharge
fast screening
recombinant
作者简介
骆凡,2016年于合肥工业大学获得学士学位,现为合肥工业大学博士研究生,主要研究方向为新能源发电与储能系统。E-mail:2449726038@qq.com;黄海宏,分别于1996年和1999年获合肥工业大学学士和硕士学位,2011年从中国科学院合肥物质科学研究院获得博士学位,现为合肥工业大学教授,主要研究方向为电力电子技术和自动控制。E-mail:hhaihong741@126.com
