Power-Electronics-Based Mission Profile Emulator for OBC with Simplified BP Models

Abstract

With the development and popularity of electric vehicles, the power level and power density of on-board chargers for EV charging system are constantly increasing, with the more complex status of operation. Recently, a new reliability testing method using power electronic converters to emulate the actual working conditions, which is called the mission profile emulation, has been proposed. However, this method is barely reported in the application of on-board chargers. Therefore, this paper aims to propose a novel MPE system for the testing of on-board chargers, where a power-electronics-based mission profile emulator is used to mimic the electrical characteristics of the lithium-ion battery pack. With the power electronics interface, this emulator allows plug-and-play tests for on-board chargers. Moreover, an extended series-parallel model and a small-signal linear AC impedance model of battery pack have been proposed. Simulations are realized in PLECS for comparison and verification.