Int J Performability Eng ›› 2019, Vol. 15 ›› Issue (1): 138-145.doi: 10.23940/ijpe.19.01.p14.138145

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Health Status Comparisons of Lithium-Ion Batteries When FusingVarious Features

Xueling Haoa, Yongquan Sunab*(), Zimei Sua, and Bo Liua   

  1. a Institute of Sensor and Reliability Engineering (ISRE), Harbin University of Science and Technology, Harbin, 150080, China
    b Center for Advanced Life Cycle Engineering (CALCE), University of Maryland, College Park, 20742, USA
  • Revised on ; Accepted on
  • Contact: Sun Yongquan E-mail:1252339448@qq.com
  • About author:Xueling Hao is currently studying for a Master’s degree in electronics and communications engineering at Harbin University of Science and Technology. Her main research interests are reliability engineering and sensor technology.|Yongquan Sun is an associate professor in the School of Measurement Technology and Communication Engineering at Harbin University of Science and Technology. His current research interests include complex system reliability and maintainability, failure mechanisms for electronic devices, and PHM.|Zimei Su is a professor at Harbin University of Science and Technology. His main research interests are reliability engineering and sensor technology.

Abstract:

In order to solve the one-sidedness problem based on a single indicator for evaluating the status of health (SOH) and predicting the remaining useful life (RUL) of lithium-ion batteries, a new algorithm is developed where the different features are integrated on the basis of the beta function distribution. The data of the capacity, internal resistance, and constant current charging time (CCCT) of lithium-ion batteries are analyzed, and then the fused features are presented. The simulation includes the data fusion of different types of batteries and the comparison between the SOH of a single indicator and the SOH of two or three fused indicators. From the simulation results, the end-of-life of the three features after fusion is shorter than the capacity, which indicates that multi-indicators are closer to the real situation than a single indicator for SOH and RUL.

Key words: lithium-ion battery, SOH, the integration of different features, beta distribution function