Abstract：In this paper, alternating current injection method is used to measure the internal impedance of battery, and the state-of-charge (SOC) measurement result by means of ampere-hour integration is used as reference. The study on the internal impedance spectra of one 12V/10Ah valve-regulated lead-acid (VRLA) battery at different SOCs reveales that: the resonance frequency, at which the battery internal impedance switches from a capacitive character to an inductive one, varies monotonously as a function of the SOC. Test results show that: the real-time and rapid estimating of SOC for VRLA battery is possible by means of resonance frequency measurement. Comparing to traditional methods based on impedance spectra, its key characteristics are: ①not have to do time-consuming sweep-frequency analysis needed in traditional impedance spectra measurement. ②not have to accurately measure the internal impedance of battery.
胡益民, 冯冠平, 刘岩. 基于阻抗谱技术的蓄电池荷电状态的估测[J]. 电工技术学报, 2009, 24(5): 225-227.
Hu Yimin, Feng Guanping, Liu Yan. Estimating State-of-Charge of Storage Battery Based on Impedance Spectra Technology. Transactions of China Electrotechnical Society, 2009, 24(5): 225-227.
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