Journal
JOURNAL OF POWER SOURCES
Volume 239, Issue -, Pages 253-264Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2013.03.129
Keywords
Lithium-ion batteries; State of health; Remaining useful life; Relevance vector machine; Battery capacity degradation model
Funding
- National Natural Science Foundation of China [50905028, 51275554]
- Program for New Century Excellent Talents in University [NCET-11-0063]
- Zhongshan Science and Technology Project [20123A338]
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [1234451] Funding Source: National Science Foundation
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Lithium-ion batteries are widely used as power sources in commercial products, such as laptops, electric vehicles (EVs) and unmanned aerial vehicles (UAVs). In order to ensure a continuous power supply, the functionality and reliability of lithium-ion batteries have received considerable attention. In this paper, a battery capacity prognostic method is developed to estimate the remaining useful life of lithium-ion batteries. This capacity prognostic method consists of a relevance vector machine and a conditional three-parameter capacity degradation model. The relevance vector machine is used to derive the relevance vectors that can be used to find the representative training vectors containing the cycles of the relevance vectors and the predictive values at the cycles of the relevance vectors. The conditional three-parameter capacity degradation model is developed to fit the predictive values at the cycles of the relevance vectors. Extrapolation of the conditional three-parameter capacity degradation model to a failure threshold is used to estimate the remaining useful life of lithium-ion batteries. Three instance studies were conducted to validate the developed method. The results show that the developed method is able to predict the future health condition of lithium-ion batteries. (C) 2013 Elsevier B.V. All rights reserved.
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