Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Design of pseudo-single-stage-type isolated/bidirectional converter for battery formation equipment

  • Received : 2021.10.06
  • Accepted : 2022.02.24
  • Published : 2022.06.20
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Abstract

In this study, we propose a method to improve the efficiency of battery formation equipment. The conventional large-capacity isolated bidirectional DC/DC converter and multichannel buck converter structure have low efficiency and power density because of the high-current design. A pseudo-single-stage-type power stage and its design are presented to improve this condition. With the proposed 215 W (5 V/43 A) class prototype, which applies a distributed design method, higher efficiency and power density are achieved compared with those of the existing formation method. Moreover, additional circuits are not needed to reduce noise and ringing voltage because all circuits consist of LLLC+buck converter, which applies a voltage-fed method.

Keywords

Acknowledgement

This work was supported by a National Research Foundation of Korea grant funded by the Korea government (No. 2019R1F1A1041270) and the Korea Agency for Infrastructure Technology Advancement grant funded by the Ministry of Land, Infrastructure, and Transport (Grant 21HCLP-C162885-01)

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