Journal Article

FZJ-2022-05983

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Module-level direct coupling in PV-battery power unit under realistic irradiance and load

Chibuko, U.FZJ* ; Merdzhanova, T.FZJ* ; Weigand, D.FZJ* ; Ezema, F. ; Agbo, S.FZJ* ; Rau, U.FZJ* ; Astakhov, O. (Corresponding author)FZJ*

2023
Elsevier Science Amsterdam [u.a.]

This record in other databases:  

Please use a persistent id in citations: http://hdl.handle.net/2128/33190  doi:10.1016/j.solener.2022.11.040

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

---

Contributing Institute(s):

1. Photovoltaik (IEK-5)

Research Program(s):

1. 1213 - Cell Design and Development (POF4-121) (POF4-121)

Appears in the scientific report 2023

---

Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

---