Details
| Original language | English |
|---|---|
| Article number | 8478423 |
| Pages (from-to) | 1510-1524 |
| Number of pages | 15 |
| Journal | IEEE journal of photovoltaics |
| Volume | 8 |
| Issue number | 6 |
| Publication status | Published - Nov 2018 |
Abstract
We experimentally analyze the position and opening behavior of cracks in multicrystalline silicon solar cells laminated in standard-sized frameless modules during mechanical loading in a 4-line-bending setup. The results of the experiment are reproduced by simulations for a standard module. These simulations open the opportunity to simulate also complex load situations. Cell interconnect ribbons have big influence to which critically extended module can be bended until a crack appears. Modules with cell interconnect ribbons that are parallel to the bending axis can be bended four times less until cell cracking than modules with cell interconnect ribbons oriented perpendicular to the bending axis and two times less compared with a module without cell interconnect ribbons. Small edge cracks parallel to the bending axis and cross cracks at the busbar decrease the critical bending in the module by a factor of four compared to small edge cracks perpendicular to the bending axis and crack-free cells. The presence of the backsheet decreases the crack width during mechanical loading by 30% compared to a module without a backsheet. In the standard module, the crack width of a single crack is 3.4 μm at loads comparable to the IEC 61215 5400 Pa test.
Keywords
- Crack, mechanical loading, photovoltaic (PV) module, silicon solar cell
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Condensed Matter Physics
- Engineering(all)
- Electrical and Electronic Engineering
Sustainable Development Goals
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In: IEEE journal of photovoltaics, Vol. 8, No. 6, 8478423, 11.2018, p. 1510-1524.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Fracture Probability, Crack Patterns, and Crack Widths of Multicrystalline Silicon Solar Cells in PV Modules During Mechanical Loading
AU - Haase, Felix
AU - Kasewieter, Jorg
AU - Nabavi, Seyed Roozbeh
AU - Jansen, Eelco
AU - Rolfes, Raimund
AU - Köntges, Marc
N1 - Funding information: Manuscript received May 10, 2018; revised August 5, 2018; accepted September 5, 2018. Date of publication October 1, 2018; date of current version October 26, 2018. This work was funded by the state of Lower Saxony and the Federal Ministry of Education and Research in the Innovationsallianz: MIKRO 03SF0419A. (Corresponding author: Felix Haase.) F. Haase, J. Käsewieter, and M. Köntges are with the Institute for Solar Energy Research Hamelin, Emmerthal 31860, Germany (e-mail:, felix.haase@isfh.de; kaesewieter@isfh.de; koentges@isfh.de).
PY - 2018/11
Y1 - 2018/11
N2 - We experimentally analyze the position and opening behavior of cracks in multicrystalline silicon solar cells laminated in standard-sized frameless modules during mechanical loading in a 4-line-bending setup. The results of the experiment are reproduced by simulations for a standard module. These simulations open the opportunity to simulate also complex load situations. Cell interconnect ribbons have big influence to which critically extended module can be bended until a crack appears. Modules with cell interconnect ribbons that are parallel to the bending axis can be bended four times less until cell cracking than modules with cell interconnect ribbons oriented perpendicular to the bending axis and two times less compared with a module without cell interconnect ribbons. Small edge cracks parallel to the bending axis and cross cracks at the busbar decrease the critical bending in the module by a factor of four compared to small edge cracks perpendicular to the bending axis and crack-free cells. The presence of the backsheet decreases the crack width during mechanical loading by 30% compared to a module without a backsheet. In the standard module, the crack width of a single crack is 3.4 μm at loads comparable to the IEC 61215 5400 Pa test.
AB - We experimentally analyze the position and opening behavior of cracks in multicrystalline silicon solar cells laminated in standard-sized frameless modules during mechanical loading in a 4-line-bending setup. The results of the experiment are reproduced by simulations for a standard module. These simulations open the opportunity to simulate also complex load situations. Cell interconnect ribbons have big influence to which critically extended module can be bended until a crack appears. Modules with cell interconnect ribbons that are parallel to the bending axis can be bended four times less until cell cracking than modules with cell interconnect ribbons oriented perpendicular to the bending axis and two times less compared with a module without cell interconnect ribbons. Small edge cracks parallel to the bending axis and cross cracks at the busbar decrease the critical bending in the module by a factor of four compared to small edge cracks perpendicular to the bending axis and crack-free cells. The presence of the backsheet decreases the crack width during mechanical loading by 30% compared to a module without a backsheet. In the standard module, the crack width of a single crack is 3.4 μm at loads comparable to the IEC 61215 5400 Pa test.
KW - Crack
KW - mechanical loading
KW - photovoltaic (PV) module
KW - silicon solar cell
UR - http://www.scopus.com/inward/record.url?scp=85054476874&partnerID=8YFLogxK
U2 - 10.1109/jphotov.2018.2871338
DO - 10.1109/jphotov.2018.2871338
M3 - Article
AN - SCOPUS:85054476874
VL - 8
SP - 1510
EP - 1524
JO - IEEE journal of photovoltaics
JF - IEEE journal of photovoltaics
SN - 2156-3381
IS - 6
M1 - 8478423
ER -