期刊
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
卷 16, 期 1, 页码 -出版社
ESG
DOI: 10.20964/2021.01.70
关键词
high energy lithium-ion battery; collaborative equivalent model; power state estimation; adaptive correction - Unscented Kalman Filter; output voltage tracking
资金
- National Natural Science Foundation of China [61801407]
- Natural Science Foundation of Southwest University of Science and Technology [17zx7110]
The study comprehensively analyzes the working characteristics of lithium cobalt oxide batteries under various operating conditions, establishes an improved collaborative equivalent model, and proposes an adaptive correction - Unscented Kalman Filter algorithm for high-precision real-time estimation of lithium-ion battery power state. Experimental results show the model's ability for accurate prediction with high convergence speed and precision, providing an effective method for battery safety control.
Accurate power state estimation plays an important role in the real-time working state monitoring and safety control of high energy lithium-ion batteries. To solve the difficulty and low accuracy problems in its real-time power state estimation under various operating conditions, the working characteristics of the lithium cobalt oxide batteries are analyzed comprehensively under various operating conditions. An improved collaborative equivalent model is established to characterize its working characteristics and then the initial power state value is calibrated by using the experimental relationship between open circuit voltage and state of charge considering the importance of the precious estimation accuracy for the later iterate calculation and correction. And then, an adaptive correction - Unscented Kalman Filter algorithm is put forward and applied for the state of charge estimation and output voltage tracking so as to realize the real-time high-precision lithium-ion battery power state estimation. The experimental results show that the established model can predict the power state of high energy lithium-ion batteries conveniently with high convergency speed within 30 seconds, accurate output voltage tracking effect within 32 mV and high accuracy, the max estimation error of which is 3.87%, providing an effective working state monitoring and safety protection method in the cleaner production and power supply processes of the high energy lithium-ion batteries.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据