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@ARTICLE{Chibuko:916163,
author = {Chibuko, Uchechi and Merdzhanova, Tsvetelina and Weigand,
Daniel and Ezema, Fabian and Agbo, Solomon and Rau, Uwe and
Astakhov, Oleksandr},
title = {{M}odule-level direct coupling in {PV}-battery power unit
under realistic irradiance and load},
journal = {Solar energy},
volume = {249},
issn = {0038-092x},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {FZJ-2022-05983},
pages = {233 - 241},
year = {2023},
abstract = {A photovoltaic (PV) module, battery and consumer or load is
usually tied together by a complex power electronics,
including maximum power point tracking (MPPT) device for
power coupling to maximize output of the PV modules. At the
same time, a typical battery itself can play the role of a
power coupling element in addition to its main energy
storage function. In principle, a properly chosen PV-battery
pair can maintain a high degree of internal power coupling
even under variable irradiance and load without MPPT
electronics. This option is of interest for e.g.
module-level integration of PV and battery to cope with
natural intermittency of a PV module power output. In this
work, we experimentally examine the function of a laboratory
scale unit of a 7-cell silicon heterojunction PV module
directly connected to a lithium-ion battery and variable
load. The unit is the simplest PV-battery module
representative for detailed study under a series of emulated
realistic profiles of irradiance and power consumption. The
directly coupled PV-battery unit shows coupling efficiencies
of above $99.8\%$ at high irradiance and approx. $98\%$ on
average through the daily cycle – a value that is
comparable to modern MPPT devices},
cin = {IEK-5},
ddc = {530},
cid = {I:(DE-Juel1)IEK-5-20101013},
pnm = {1213 - Cell Design and Development (POF4-121)},
pid = {G:(DE-HGF)POF4-1213},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000908341900002},
doi = {10.1016/j.solener.2022.11.040},
url = {https://juser.fz-juelich.de/record/916163},
}