Back-end Power Electronics Modules for DC-type EV Charging

Wide Voltage Range DC/DC Converters

Doctoral thesis (2024)

Authors

D. Lyu DC systems, Energy conversion & Storage - EEMCS
Research Group
DC systems, Energy conversion & Storage (EEMCS) (TU Delft)
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Published Date

2024

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Electrical Sustainable Energy

Research Group

DC systems, Energy conversion & Storage

Abstract

In the last decade, the market for Electric Vehicles (EV) has expanded at an unprecedented rate. Concurrently, there has been a surge in the demand for public Direct Current (DC) EV charging stations. To accommodate a diverse array of EVs, these charging stations are required to support a broad operational voltage and power spectrum. However, this necessity introduces a trade-off between the operational range and the efficiency and utilization of the installed power within the charging infrastructure. The core of the issue lies in the fact that the charging stations, designed to cater to a wide range of operational conditions, often do not operate at their peak efficiency outside their designated optimal performance region.
To address this challenge, this thesis investigates the advantageous DC/DC power electronics solutions that can maintain high efficiency across a wider operational range while optimizing the utilization of installed power. The research topics include the suitable DC/DC converters for the back-end power modules of the charging system, the multi-objective design process of the power modules, and the advanced operation of the power modules.

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