RESEARCH ON LITHIUM-ION BATTERY REMAINING USEFUL LIFE PREDICTION METHOD BASED ON PHASE PLANE TWO-DIMENSIONAL SAMPLE ENTROPY

Li Zhiming; Xia Xiangyang; Zhao Xiaoyue; Lu Qifu; Xia Tian; Cai Yukuan

doi:10.19912/j.0254-0096.tynxb.2025-0289

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (7) : 296-305. DOI: 10.19912/j.0254-0096.tynxb.2025-0289

RESEARCH ON LITHIUM-ION BATTERY REMAINING USEFUL LIFE PREDICTION METHOD BASED ON PHASE PLANE TWO-DIMENSIONAL SAMPLE ENTROPY

Li Zhiming¹, Xia Xiangyang¹, Zhao Xiaoyue¹, Lu Qifu², Xia Tian¹, Cai Yukuan³

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Abstract

Aiming at the problems of insufficient visualization of the aging process of lithium-ion batteries and difficulty in accurately estimating remaining useful life, this paper proposes a lithium-ion battery remaining useful life prediction method based on phase plane two-dimensional sample entropy （PP-2DSE）. The method first visualizes the aging process by constructing the battery phase plane （PP） and transforms battery monitoring data into a two-dimensional time series; secondly, calculates the two-dimensional sample entropy （2DSE） value, thereby quantifying the battery aging process into an observable indicator; and finally, through the validation of the actual operation data of an energy storage plant in Hunan Province and the NASA public dataset, the results show that, with gradual battery aging, the peak value in the specific interval of the PP-2DSE curve appears earlier and its amplitude increases, and the ratio of the peak value to its corresponding time is used as a health factor to achieve accurate prediction of the remaining battery life. The method shows good effectiveness and robustness in both qualitative and quantitative analyses and provides a new solution for lithium-ion battery remaining useful life prediction, which can provide accurate information for safe scheduling and control of energy storage plants by power departments under different working conditions.

Key words

lithium batteries / battery storage / remaining useful life / battery aging process / phase plane / two dimensional sample entropy

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Li Zhiming, Xia Xiangyang, Zhao Xiaoyue, Lu Qifu, Xia Tian, Cai Yukuan. RESEARCH ON LITHIUM-ION BATTERY REMAINING USEFUL LIFE PREDICTION METHOD BASED ON PHASE PLANE TWO-DIMENSIONAL SAMPLE ENTROPY[J]. Acta Energiae Solaris Sinica. 2026, 47(7): 296-305 https://doi.org/10.19912/j.0254-0096.tynxb.2025-0289

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