Measuring Online Battery AC Resistance Using a DC-DC Converter With Time and Frequency Hybrid Method

IF 3.4 3区计算机科学 Q2 COMPUTER SCIENCE, INFORMATION SYSTEMS

IEEE Access Pub Date : 2025-02-24 DOI:10.1109/ACCESS.2025.3544808

Seong-Jong Kim;Hwa-Pyeong Park;Tae-Hwan Jin;In-Jun Lee

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Abstract

The estimation of battery state is important for ensuring the stability of batteries. The AC resistance of a battery is one of the factors used to estimate the battery state, and is measured using a Fast Fourier Transform (FFT), a technique that analyzes the frequency components. The power converter can implement the dual functionality of power conversion and online AC resistance measurements and achieve high cost-effectiveness with the addition of only a control algorithm. However, the high FFT resolution in a Digital Signal Processor (DSP) requires a long computation time and Random-Access Memory (RAM) to process large amounts of data. Therefore, it is difficult to measure low-frequency ranges using AC resistance calculations based on the FFT. In this study, a time- and frequency-domain hybrid measurement method to enhance low-frequency AC resistance measurements with the desired frequency resolution is proposed. This study investigates frequency resolution in the low-frequency range using time- and frequency-domain measurement methods. The operational principle of the proposed method was analyzed to design a measurement algorithm. The experimental results verified the performance of the proposed method by measuring the AC resistance of a battery within the desired frequency range.

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来源期刊

IEEE Access COMPUTER SCIENCE, INFORMATION SYSTEMSENGIN-ENGINEERING, ELECTRICAL & ELECTRONIC

CiteScore

9.80

自引率

7.70%

发文量

6673

审稿时长

6 weeks

期刊介绍： IEEE Access® is a multidisciplinary, open access (OA), applications-oriented, all-electronic archival journal that continuously presents the results of original research or development across all of IEEE''s fields of interest. IEEE Access will publish articles that are of high interest to readers, original, technically correct, and clearly presented. Supported by author publication charges (APC), its hallmarks are a rapid peer review and publication process with open access to all readers. Unlike IEEE''s traditional Transactions or Journals, reviews are "binary", in that reviewers will either Accept or Reject an article in the form it is submitted in order to achieve rapid turnaround. Especially encouraged are submissions on: Multidisciplinary topics, or applications-oriented articles and negative results that do not fit within the scope of IEEE''s traditional journals. Practical articles discussing new experiments or measurement techniques, interesting solutions to engineering. Development of new or improved fabrication or manufacturing techniques. Reviews or survey articles of new or evolving fields oriented to assist others in understanding the new area.