| 基于开路电压回升速率和交流阻抗相结合的一种锂离子电池SOH算法 |
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| 引用本文： | 黄伟昭,李小平,张栋省,刘燕林,刘震,李伟善.基于开路电压回升速率和交流阻抗相结合的一种锂离子电池SOH算法[J].新能源进展,2014,2(1):43-48. |
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| 作者姓名： | 黄伟昭 李小平 张栋省 刘燕林 刘震 李伟善 |
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| 作者单位： | 1. 华南师范大学化学与环境学院，广东高校电化学储能与发电技术重点实验室，电化学储能与技术教育部工程研究中心，广州 510006；
2. 广东精进能源能源有限公司，佛山 528306 |
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| 基金项目： | 广东省创新团队项目（2011N071）；广东省发改委项目（粤发改高技术〔2012〕830号）；容桂镇产学研项目（容桂经发〔2013〕11号） |
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| 摘 要： | 本研究所述SOH（State-of-health）估算方法是通过记录锂离子动力电池放电截止之后的开路电压值的变化，从而得出开路电压回升速率，作为主要因素判断值；对锂离子动力电池进行交流阻抗测试，得出交流阻抗图谱，并进行拟合，从而计算出锂离子动力电池的内部阻抗值，作为次要因素判断值，将主要因素判断值和次要因素判断值相加即为锂离子动力电池的SOH值，使得计算结果更加准确。该方法中考虑了电池温度、放电电流、放电截止电压等因素，得到锂离子动力电池开路电压回升曲线及内部各部分阻值。比较研究表明：该方法能够简便、快速地估算出锂离子动力电池的健康状态。
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| 关 键 词： | SOH 开路电压回升速率 交流阻抗 内部阻值 |
| 收稿时间： | 2013-12-01 |
SOH Estimation of Li-ion Batteries by Combining Recovery Rate of Open Circuit Voltage with Impedance |
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| HUANG Wei-Zhao,LI Xiao-Ping,ZHANG Dong-sheng,LIU Yan-lin,LIU Zhen,LI Wei-Shan.SOH Estimation of Li-ion Batteries by Combining Recovery Rate of Open Circuit Voltage with Impedance[J].Advances in New and Renewable Energy,2014,2(1):43-48. |
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| Authors: | HUANG Wei-Zhao LI Xiao-Ping ZHANG Dong-sheng LIU Yan-lin LIU Zhen LI Wei-Shan |
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| Affiliation: | 1. Key Laboratory of Electrochemical Technology on Energy Storage and Power Generation of Guangdong Higher Education Institutes, Engineering Research Center of Materials and Technology for Electrochemical Energy Storage, School of Chemistry and Environment, South China Normal University, Guangzhou 510006, China
2. Advanced Energy Electronics Limited, Foshan 528306, China |
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| Abstract: | The estimation of SOH (State-of-health) is based on measuring the recovery rate of open circuit voltage and impedance of the lithium ion battery after discharge. The recovery rate of open circuit voltage is selected as the main factor, while the impedance as the secondary factor for the SOH estimation with considering the effects of temperature, discharge current, cut-off voltage, and various impedances in battery. This estimation is more accurate than the estimation based on a single factor. |
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| Keywords: | SOH the recovery rate of open circuit voltage electrochemical impedance internal resistance |
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