A 6-kW, 2-kWh lithium-ion battery energy storage system using a bidirectional isolated dc-dc converter

Nadia Mei Lin Tan, Takahiro Abe, Hirofumi Akagi

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

26 Citations (Scopus)

Abstract

This paper describes the design and operation of a 6-kW, full-bridge, zero-voltage switching, bidirectional isolated dc-dc converter for a 2-kWh lithium-ion (Li-ion) bank that is considered attractive as an energy storage system for applications to photovoltaic generation systems ranging from 10 to 30 kW. The dc voltage at the high-voltage side of the converter is controlled from 305 to 355 V as the battery voltage at the low-voltage side varies from 50 to 59 V. The galvanic isolation using a 20kHz transformer with a turns ratio of 6:1 provides flexibility in voltage matching and safety. This paper presents experimental verifications of bidirectional power flow into (battery charging), or out of (battery discharging) the Li-ion battery bank. The maximal efficiency of the dc-dc converter is measured to be 96.1% during battery charging, and 96.9% during battery discharging.

Original languageEnglish
Title of host publication2010 International Power Electronics Conference - ECCE Asia -, IPEC 2010
Pages46-52
Number of pages7
DOIs
Publication statusPublished - 17 Sep 2010
Event2010 International Power Electronics Conference - ECCE Asia -, IPEC 2010 - Sapporo, Japan
Duration: 21 Jun 201024 Jun 2010

Publication series

Name2010 International Power Electronics Conference - ECCE Asia -, IPEC 2010

Other

Other2010 International Power Electronics Conference - ECCE Asia -, IPEC 2010
CountryJapan
CitySapporo
Period21/06/1024/06/10

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All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

Cite this

Tan, N. M. L., Abe, T., & Akagi, H. (2010). A 6-kW, 2-kWh lithium-ion battery energy storage system using a bidirectional isolated dc-dc converter. In 2010 International Power Electronics Conference - ECCE Asia -, IPEC 2010 (pp. 46-52). [5543647] (2010 International Power Electronics Conference - ECCE Asia -, IPEC 2010). https://doi.org/10.1109/IPEC.2010.5543647