{"title":"A Study on MHz Switching Operation in Flyback Converter for Lithium Ion Battery and its Parallelization","authors":"Kentaro Nakayama, N. Satoh","doi":"10.1109/WiPDAAsia49671.2020.9360294","DOIUrl":null,"url":null,"abstract":"Lithium-ion batteries (LiBs) have been widely used as consumer rechargeable batteries. We use the flyback topology, which is a type of isolated DC/DC converter, as the boosting circuit for an LiB. In this study, the flyback converter is operated with a single LiB in both the main and gate drive circuits. The switching frequency of conventional flyback converters is in the range of several hundred kHz. However, we aim to drive the flyback converter at 2.1MHz. Accordingly, Si and GaN devices are compared, and Liqualloy magnetic materials are investigated. Then, the components suitable for our field of use are reexamined. Additionally, our approach for the parallelization of the circuit to compensate for the drop in the output voltage of the LiB is described.","PeriodicalId":432666,"journal":{"name":"2020 IEEE Workshop on Wide Bandgap Power Devices and Applications in Asia (WiPDA Asia)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2020 IEEE Workshop on Wide Bandgap Power Devices and Applications in Asia (WiPDA Asia)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/WiPDAAsia49671.2020.9360294","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1
Abstract
Lithium-ion batteries (LiBs) have been widely used as consumer rechargeable batteries. We use the flyback topology, which is a type of isolated DC/DC converter, as the boosting circuit for an LiB. In this study, the flyback converter is operated with a single LiB in both the main and gate drive circuits. The switching frequency of conventional flyback converters is in the range of several hundred kHz. However, we aim to drive the flyback converter at 2.1MHz. Accordingly, Si and GaN devices are compared, and Liqualloy magnetic materials are investigated. Then, the components suitable for our field of use are reexamined. Additionally, our approach for the parallelization of the circuit to compensate for the drop in the output voltage of the LiB is described.
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