SOC Estimation of Li-Ion Power Battery Based on Strong Tracking UKF with Multiple Suboptimal Fading Factors

IF 1.5 4区工程技术 Q3 ENGINEERING, MECHANICAL

International Journal of Automotive Technology Pub Date : 2024-05-17 DOI:10.1007/s12239-024-00093-9

Zhengjun Huang, Tengfei Xiang, Yu Chen, Ludan Shi

引用次数: 0

Abstract

A method based on strong tracking unscented Kalman filter with multiple suboptimal fading factors (MSTUKF) was proposed to accurately estimate the state of charge (SOC) of power batteries of electric vehicles online. Taking a certain lithium-ion battery as the research object, a second-order RC equivalent circuit model of the battery was established based on its external characteristics and related mechanism. Then the recursive least squares method with forgetting factor was adopted to identify the model parameters, and the MSTUKF nonlinear state space equation of the battery was established according to the equivalent circuit model. Finally, the SOC estimation algorithm was verified by simulation experiments under ECE15 and UDDS conditions. The results show that the error of MSTUKF in SOC estimation of lithium-ion battery is kept within 1.5%, so this method can estimate battery SOC accurately.

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基于多种次优消隐因子的强跟踪 UKF 的锂离子动力电池 SOC 估算

提出了一种基于强跟踪无香精卡尔曼滤波器与多重次优衰减因子（MSTUKF）的方法，用于在线精确估算电动汽车动力电池的电量（SOC）状态。以某锂离子电池为研究对象，根据其外部特性和相关机理建立了电池的二阶 RC 等效电路模型。然后采用带遗忘因子的递归最小二乘法确定模型参数，并根据等效电路模型建立了电池的 MSTUKF 非线性状态空间方程。最后，在 ECE15 和 UDDS 条件下通过仿真实验验证了 SOC 估算算法。结果表明，MSTUKF 在锂离子电池 SOC 估算中的误差控制在 1.5% 以内，因此该方法可以准确估算电池 SOC。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Automotive Technology 工程技术-工程：机械

CiteScore

3.10

自引率

12.50%

发文量

129

审稿时长

6 months

期刊介绍： The International Journal of Automotive Technology has as its objective the publication and dissemination of original research in all fields of AUTOMOTIVE TECHNOLOGY, SCIENCE and ENGINEERING. It fosters thus the exchange of ideas among researchers in different parts of the world and also among researchers who emphasize different aspects of the foundations and applications of the field. Standing as it does at the cross-roads of Physics, Chemistry, Mechanics, Engineering Design and Materials Sciences, AUTOMOTIVE TECHNOLOGY is experiencing considerable growth as a result of recent technological advances. The Journal, by providing an international medium of communication, is encouraging this growth and is encompassing all aspects of the field from thermal engineering, flow analysis, structural analysis, modal analysis, control, vehicular electronics, mechatronis, electro-mechanical engineering, optimum design methods, ITS, and recycling. Interest extends from the basic science to technology applications with analytical, experimental and numerical studies. The emphasis is placed on contributions that appear to be of permanent interest to research workers and engineers in the field. If furthering knowledge in the area of principal concern of the Journal, papers of primary interest to the innovative disciplines of AUTOMOTIVE TECHNOLOGY, SCIENCE and ENGINEERING may be published. Papers that are merely illustrations of established principles and procedures, even though possibly containing new numerical or experimental data, will generally not be published. When outstanding advances are made in existing areas or when new areas have been developed to a definitive stage, special review articles will be considered by the editors. No length limitations for contributions are set, but only concisely written papers are published. Brief articles are considered on the basis of technical merit.