A 13.56 MHz multiport-wireless-coupled (MWC) battery balancer with high frequency online electrochemical impedance spectroscopy

Ming Liu, Ping Wang, Yueshi Guan, Minjie Chen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations

Abstract

This paper presents a multi-MHz multiport-wireless-coupled (MWC) battery balancer with the capability of performing high frequency electrochemical impedance spectroscopy (EIS) to monitor the battery state-of-charge (SOC) and state-of-health (SOH). The proposed MHz MWC architecture performs EIS measurement as well as battery balancing without using extra EIS perturbation circuitry. The battery balancer operates at 13.56 MHz and can perform precise EIS measurement up to 500 kHz. The high switching frequency also eliminates the magnetic core, allowing the utilization of flexible PCB air core magnetics to miniaturize the size of the battery balancer. A 13.56 MHz MWC battery balancer with a four-port air core flexible PCB transformer is built and tested with Lithium-ion, Lithium-polymer and AA-NIMH battery packs. The experimental results matched well with commercial EIS equipment and validated the effectiveness of the MWC battery balancer.

Original languageEnglish (US)
Title of host publication2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages537-544
Number of pages8
ISBN (Electronic)9781728103952
DOIs
StatePublished - Sep 2019
Event11th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2019 - Baltimore, United States
Duration: Sep 29 2019Oct 3 2019

Publication series

Name2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019

Conference

Conference11th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2019
CountryUnited States
CityBaltimore
Period9/29/1910/3/19

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Control and Optimization
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

Keywords

  • Battery balancer
  • Battery management system
  • Electrochemical impedance spectroscopy
  • Multiport wireless-coupled transformer
  • Power flow control

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  • Cite this

    Liu, M., Wang, P., Guan, Y., & Chen, M. (2019). A 13.56 MHz multiport-wireless-coupled (MWC) battery balancer with high frequency online electrochemical impedance spectroscopy. In 2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019 (pp. 537-544). [8912880] (2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ECCE.2019.8912880