Experimental Characterization of Fuel Cells, Supercapacitors, and Their Passive Connection
Paper in proceeding, 2022

This paper investigates a passive hybrid configuration consisting of a fuel cell stack and a supercapacitor bank. In this configuration, the fuel cell and the supercapacitor are directly connected in parallel without the use of any DC/DC converters. Extensive experiments are performed on the fuel cell stack, the supercapacitor bank, and their passive hybrid connection. The internal impedance of the supercapacitor bank is 10 times lower than that of the fuel cell stack. The hybrid system shows a capacitive behavior in the selected frequency range, as given by the electrochemical impedance spectroscopy results. For the fuel cell stack, its voltage response to the step load current shows an inductive behavior, which can be represented by an RL circuit. On the other hand, the dynamics of the supercapacitor bank can be represented by two RC branches. When a step load current is applied, the supercapacitor provides the transient current while the fuel cell provides the steady current.

fuel cell stack

supercapacitor bank

electrochemical impedance spectroscopy

Passive hybrid system

step load current

Author

Qian Xun

Chalmers, Electrical Engineering, Electric Power Engineering

Yujing Liu

Chalmers, Electrical Engineering, Electric Power Engineering

Stefan Lundberg

Chalmers, Electrical Engineering, Electric Power Engineering

Torbjörn Thiringer

Chalmers, Electrical Engineering, Electric Power Engineering

2022 IEEE 13th International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2022


9781665466189 (ISBN)

2022 IEEE 13th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)
Kiel, Germany,

Trends in Energy Storage Technologies (TEST)

Chalmers, 2020-01-01 -- 2020-06-01.

Areas of Advance

Energy

Subject Categories

Other Chemical Engineering

Other Medical Biotechnology

Other Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.1109/PEDG54999.2022.9923210

More information

Latest update

10/27/2023