Abstract
This paper describes the design and performance of a 6-kW, full-bridge, bidirectional isolated dc-dc converter using a 20-kHz transformer for a 53.2-V, 2-kWh lithium-ion (Li-ion) battery energy storage system. The dc voltage at the high-voltage side is controlled from 305 to 355 V, as the battery voltage at the low-voltage side (LVS) varies from 50 to 59 V. The maximal efficiency of the dc-dc converter is measured to be 96.0 during battery charging, and 96.9 during battery discharging. Moreover, this paper analyzes the effect of unavoidable dc-bias currents on the magnetic-flux saturation of the transformer. Finally, it provides the dc-dc converter loss breakdown with more focus on the LVS converter.
| Original language | English |
|---|---|
| Article number | 5711673 |
| Pages (from-to) | 1237-1248 |
| Number of pages | 12 |
| Journal | IEEE Transactions on Power Electronics |
| Volume | 27 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 2012 |
| Externally published | Yes |
Keywords
- Bidirectional isolated dc-dc converters
- dc-bias currents
- energy storage systems
- lithium-ion (Li-ion) battery
ASJC Scopus subject areas
- Electrical and Electronic Engineering
