標題: An accurate lithium-ion battery gas gauge using two-phase STC modeling
作者: Yang, Hsueh-Chih
Dung, Lan-Rong
電控工程研究所
Institute of Electrical and Control Engineering
公開日期: 2007
摘要: The lithium-ion (Li-ion) battery is a time-varying, nonlinear component. Its discharge characteristic is dependent on discharge current, loading change scheme, ambient temperature, and initial state-of-charge (SoC), and hence its remaining time can vary with the discharge operating conditions in a manner of nonlinear relationship. The non-linearity behavior makes the accurate gas-gauge of Li-ion battery very difficult. This paper presents an efficient scheme to simplify the estimation of battery service time with high-degree of accuracy. According to the typical discharge characteristic of Li-ion batteries, we applied a two-phase single-time-constant (STC) model for the gas-gauging strategy and parameterize the discharge operating conditions in terms of the first-phase gradient, the knee voltage, and the second-phase gradient, instead of using complex curve-fitting equations. As shown in the experimental results, the accuracy of predicted remaining time is less than 1% for constant current cases, and 10% for loading change cases.
URI: http://hdl.handle.net/11536/11468
http://dx.doi.org/10.1109/ISIE.2007.4374711
ISBN: 978-1-4244-0754-5
DOI: 10.1109/ISIE.2007.4374711
期刊: 2007 IEEE INTERNATIONAL SYMPOSIUM ON INDUSTRIAL ELECTRONICS, PROCEEDINGS, VOLS 1-8
起始頁: 866
結束頁: 871
顯示於類別:會議論文


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