Drive Cycle Energy Efficiency of Fuel Cell/Supercapacitor Passive Hybrid Vehicle System
Artikel i vetenskaplig tidskrift, 2020

The electric vehicle with passive hybridization of fuel cells and supercapacitors leads to lower cost and compactness due to the absence of DC/DC converters. This paper models such a vehicle and evaluates the energy efficiency of its powertrain system. The powertrain component losses, as functions of electric machine torque, speed and DC-link voltage, are modelled with a high level of detail which are verified against available test data. Compared to a pure fuel cell system, the fuel cell efficiency is higher when supercapacitors are introduced under pulse current load, and it is higher at lower current amplitude. As the pulse current frequency increases, the fuel cell efficiency also increases due to higher proportional current from the high-efficiency supercapacitors. A multiplicity of drive cycles is selected, divided into a low, middle, and high speed category to analyze the powertrain efficiency. The total powertrain energy efficiency varies between 53%-71% during propulsion for the studied drive cycles, whereas it is higher during braking ranging from 84% to 94%. The differences are closely related to the speed, acceleration, and DC-link voltage levels. The lower powertrain efficiency causes higher hydrogen consumption, leading to a reduced fuel cell efficiency at high speed, high acceleration and low DC-link voltage.

hydrogen consumption.

fuel cells

supercapacitors

drive cycles

energy efficiency

passive hybridization

Författare

Qian Xun

Chalmers, Elektroteknik, Elkraftteknik, Elmaskiner och kraftelektronik

Yujing Liu

Chalmers, Elektroteknik, Elkraftteknik, Elmaskiner och kraftelektronik

Jian Zhao

Chalmers, Elektroteknik, Elkraftteknik, Elmaskiner och kraftelektronik

Emma Grunditz

Chalmers, Elektroteknik, Elkraftteknik, Elmaskiner och kraftelektronik

Nan Zhao

University College Dublin

Xiaoliang Huang

Chalmers, Elektroteknik, Elkraftteknik, Elmaskiner och kraftelektronik

IEEE Transactions on Industry Applications

0093-9994 (ISSN)

Cost-effective drivetrains for fuel cell powered EVs

Kompetenscentrum för forskning och utveckling av el- och hybridfordon (SHC), 2017-01-01 -- 2019-06-30.

Bränslecellsdrivsystem med svävande spänning

Energimyndigheten, 2018-01-01 -- 2018-08-31.

Drivkrafter

Hållbar utveckling

Styrkeområden

Transport

Energi

Ämneskategorier

Reglerteknik

Annan elektroteknik och elektronik

DOI

10.1109/TIA.2020.3035551

Mer information

Skapat

2020-11-05