Abstract
This paper presents a novel method for the online impedance measurement of operational batteries that utilizes Sinc function signal injection via a DC-DC power converter. The Sinc function perturbation signal, with its multiple frequency components, enables simultaneous impedance measurement of the battery at various frequencies, thus ensuring high measurement efficiency. Additionally, the generation and injection processes for this perturbation signal are simple and straightforward. Its power spectrum, characterized by a uniform distribution and relatively high power content, enables precise measurements across the entire frequency range of interest. The paper extensively discusses the measurement principle and properties using the perturbation signal, followed by an analysis of the circuit topology to derive the transfer functions, and a simulation to examine the battery’s responses under the perturbation signal. Finally, a case study using a 2.8 Ah 883860-size lithium polymer battery demonstrates the feasibility and accuracy of the proposed method.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
