Design of fast charging technique for electrical vehicle charging stations with grid-tied cascaded H-bridge multilevel converters

To compete with gas stations, electrical vehicle charging stations should be able to charge batteries as fast as possible. In this paper, a fast charging technique for a grid-tied, cascaded H-bridge (CHB) converter based charging station is developed. A controller is designed to achieve constant cur...

Full description

Saved in:
Bibliographic Details
Main Authors: Moeini, Amirhossein, Wang, Shuo
Format: Conference Proceeding
Language:English
Subjects:
Batteries
cascaded H-bridge
Charging stations
electrical vehicle charging station
Fast charging
internal resistance
Mathematical model
polarization parameters
Resistance
State of charge
Voltage control
Voltage measurement
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:To compete with gas stations, electrical vehicle charging stations should be able to charge batteries as fast as possible. In this paper, a fast charging technique for a grid-tied, cascaded H-bridge (CHB) converter based charging station is developed. A controller is designed to achieve constant current-constant voltage (CC-CV) charging for all of the cells of the CHB converter. As proven in this paper, to achieve fast charging, the effects of internal resistance and polarization parameters of battery should be compensated. To reach this goal, the internal resistance and polarization parameters of battery are estimated based on the initial fast measurements before formal battery charging. The estimated parameters can increase the constant current charging duration for Li-Ion batteries so the charging speed is improved. Experiments are conducted on a charging station which is based on a 7-level grid-tied CHB converter to validate the proposed fast charging technique.
ISSN:2470-6647
DOI:10.1109/APEC.2018.8341621