Abstract

The equalizer is required to reduce the voltage imbalance of series-connected lithium-ion batteries to achieve efficient and safe operations. Repeated charging and discharging energy to the lithium-ion battery can cause a charge imbalance between the battery cells, as each battery cell has an unavoidable difference in chemical and electrical characteristics. An imbalance of the battery cells will reduce the total storage capacity and decrease the lifetime. This paper proposed a two-stage charge equalizer with modularized cell selection switches for voltage imbalance detection. Two-stage flyback converters were used along with three battery cells. The cell selection switches were used to avoid overcharging or undercharging in one of the cells during the charging process. In addition, the two-stage charge equalizer method operated properly since modulation of the cell selection switch of the lithium-ion battery charging process arranged in series has worked safely and made the battery life longer. The battery charge equalizer implementation worked well with a voltage difference of 10 mV for each battery cell. The duration of the equalization process depends on the voltage difference between the tested battery cells. Furthermore, the charging equalization can be optimally improved according to the experimental results.

Original languageEnglish
Title of host publication2022 International Seminar on Intelligent Technology and Its Applications
Subtitle of host publicationAdvanced Innovations of Electrical Systems for Humanity, ISITIA 2022 - Proceeding
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages389-394
Number of pages6
ISBN (Electronic)9781665460811
DOIs
Publication statusPublished - 2022
Event23rd International Seminar on Intelligent Technology and Its Applications, ISITIA 2022 - Virtual, Surabaya, Indonesia
Duration: 20 Jul 202221 Jul 2022

Publication series

Name2022 International Seminar on Intelligent Technology and Its Applications: Advanced Innovations of Electrical Systems for Humanity, ISITIA 2022 - Proceeding

Conference

Conference23rd International Seminar on Intelligent Technology and Its Applications, ISITIA 2022
Country/TerritoryIndonesia
CityVirtual, Surabaya
Period20/07/2221/07/22

Keywords

  • cell selection switches
  • charge equalizer
  • flyback converter
  • lithium-ion battery

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