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SOH Estimation of Li-ion Batteries by Combining Recovery Rate of Open Circuit Voltage with Impedance

  • HUANG Wei-Zhao ,
  • LI Xiao-Ping ,
  • ZHANG Dong-sheng ,
  • LIU Yan-lin ,
  • LIU Zhen ,
  • LI Wei-Shan
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  • 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

Received date: 2013-12-01

  Revised date: 2014-02-18

  Online published: 2014-02-28

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.

Cite this article

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 . DOI: 10.3969/j.issn.2095-560X.2014.01.008

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