Modeling and Analyzing Load Profiles for Fuel Cell Powered Cargo Bicycles

Abstract

Proton exchange membrane fuel cells (PEMFCs) are at the forefront for transportation applications due to their high efficiency and low pollutant emissions. The Polymer Fuel Cell Group of the German Aerospace Center (DLR) is rolling out a demonstration project for the usage of electrical cargo bicycles powered by fuel cells in urban delivery services. The expected performance and degradation of these fuel cells are yet to be known when they are subject to real operating conditions. The goal of this master’s thesis is to analyze different load cycles that simulate real driving profiles and study the performance and degradation of the cell over time. To study this, ex situ and in situ characterization of the cell is performed. In situ techniques are based on Cyclic Voltammetry (CV) and Electrochemical Impedance spectroscopy (EIS). To evaluate the changes on the surface of different parts of the cell and assess its degradation, Ex situ analysis is performed using scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). Additionally, a data acquisition unit is developed to gather real-time information from the testing station.