EN IEC 62787:2021

Concentrator photovoltaic (CPV) solar cells and cell on carrier (CoC) assemblies - Qualification

This document specifies the minimum requirements for the qualification of concentrator photovoltaic (CPV) cells and Cell on Carrier (CoC) assemblies for incorporation into CPV receivers, modules and systems. The object of this qualification standard is to determine the optoelectronic, mechanical, thermal, and processing characteristics of CPV cells and CoCs to show that they are capable of withstanding assembly processes and CPV application environments. The qualification tests of this document are designed to demonstrate that cells or CoCs are suitable for typical assembly processes, and when properly assembled, are capable of passing IEC 62108. This document defines qualification testing for two levels of concentrator photovoltaic device assembly: a) cell, or bare cell; and b) cell on carrier (CoC). NOTE Note that a variety of alternate names are used within the industry, such as solar cell assembly, receiver, etc.

Konzentrator-Photovoltaik(CPV)-Solarzellen und -Anordnungen von Solarzellen auf Trägern (CoC) - Qualifikation

Cellules solaires photovoltaïques à concentration (PVC) et ensembles de cellules sur support (CoC) - Qualification

IEC 62787:2021 spécifie les exigences minimales relatives à la qualification des cellules photovoltaïques à concentration (CPV) et des assemblages de cellules sur support (CoC) pour intégration dans les récepteurs, modules et systèmes CPV. La présente norme de qualification a pour objet de déterminer les caractéristiques optoélectroniques, mécaniques, thermiques et de traitement des cellules CPV et des CoC afin de montrer qu’elles sont capables de résister aux processus de l’assemblage et aux environnements d’application des CPV. Les essais de qualification du présent document visent à démontrer que les cellules ou les CoC sont adaptées à des processus d’assemblage classiques, et qu’elles sont capables de satisfaire à l’IEC 62108 si elles sont correctement assemblées. Le présent document définit les essais de qualification pour deux niveaux d’un ensemble de dispositifs photovoltaïques à concentration: a) cellule (ou cellule nue), et b) cellule sur support (CoC).

Koncentratorske fotonapetostne (CPV) sončne celice in sestavi celic na nosilcu (CoC) - Opredelitev zanesljivosti

General Information

• Status: Published
• Publication Date: 11-Mar-2021
• ICS: 27.160 - Solar energy engineering
• Technical Committee: CLC/TC 82 - Solar photovoltaic energy systems
• Drafting Committee: IEC/TC 82 - IEC_TC_82
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 12-Mar-2021
• Completion Date: 12-Mar-2021
• Ref Project: SIST EN IEC 62787:2021 - Concentrator photovoltaic (CPV) solar cells and cell-on-carrier (COC) assemblies - Reliability qualification

Standards Content (Sample)

SLOVENSKI STANDARD
01-junij-2021
Koncentratorske fotonapetostne (CPV) sončne celice in sestavi celic na nosilcu
(CoC) - Opredelitev zanesljivosti
Concentrator photovoltaic (CPV) solar cells and cell-on-carrier (COC) assemblies -
Reliability qualification
Ta slovenski standard je istoveten z: EN IEC 62787:2021
ICS:
27.160 Sončna energija Solar energy engineering
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 62787

NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2021
ICS 27.160
English Version
Concentrator photovoltaic (CPV) solar cells and cell on carrier
(CoC) assemblies - Qualification
(IEC 62787:2021)
Cellules solaires photovoltaïques à concentration (PVC) et Konzentrator-Photovoltaik(CPV)- Solarzellen und -
ensembles de cellules sur support (CoC) - Qualification Anordnungen von Solarzellen auf Trägern (CoC)
(IEC 62787:2021) (IEC 62787:2021)
This European Standard was approved by CENELEC on 2021-03-10. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 62787:2021 E
European foreword
The text of document 82/1818/FDIS, future edition 1 of IEC 62787, prepared by IEC/TC 82 "Solar
photovoltaic energy systems" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN IEC 62787:2021.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2021-12-10
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2024-03-10
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Endorsement notice
The text of the International Standard IEC 62787:2021 was approved by CENELEC as a European
Standard without any modification.
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1  Where an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2  Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60721-2-1 2013 Classification of environmental conditions EN 60721-2-1 2014
- Part 2-1: Environmental conditions
appearing in nature - Temperature and
humidity
IEC 60749-3 2017 Semiconductor devices - Mechanical and EN 60749-3 2017
climatic test methods - Part 3: External
visual examination
IEC 60749-6 2017 Semiconductor devices - Mechanical and EN 60749-6 2017
climatic test methods - Part 6: Storage at
high temperature
IEC 60749-14 2003 Semiconductor devices - Mechanical and EN 60749-14 2003
climatic test methods - Part 14:
Robustness of terminations (lead
integrity)
IEC 60749-21 2011 Semiconductor devices - Mechanical and EN 60749-21 2011
climatic test methods - Part 21:
Solderability
IEC 60749-22 2002 Semiconductor devices - Mechanical and EN 60749-22 2003
climatic test methods - Part 22: Bond
strength
IEC 60904-1-1 2017 Photovoltaic devices - Part 1-1: EN 60904-1-1 2017
Measurement of current-voltage
characteristics of multi-junction
photovoltaic (PV) devices
IEC 61000-4-2 2008 Electromagnetic compatibility (EMC) - EN 61000-4-2 2009
Part 4-2: Testing and measurement
techniques - Electrostatic discharge
immunity test
Publication Year Title EN/HD Year
IEC 61193-2 2007 Quality assessment systems - Part 2: EN 61193-2 2007
Selection and use of sampling plans for
inspection of electronic components and
packages
IEC/TS 61836 2016 Solar photovoltaic energy systems - - -
Terms, definitions and symbols
IEC 62108 2016 Concentrator photovoltaic (CPV) EN 62108 2016
modules and assemblies - Design
qualification and type approval
IEC 62137-1-2 2007 Surface mounting technology - EN 62137-1-2 2007
Environmental and endurance test
methods for surface mount solder joint -
Part 1-2: Shear strength test
IEC 62670-1 2013 Photovoltaic concentrators (CPV) - EN 62670-1 2014
Performance testing - Part 1: Standard
conditions
IEC/TS 62789 2014 Photovoltaic concentrator cell - -
documentation
IEC 63202-2 - Photovoltaic cells - Part 2: - -
Electroluminescence image for
crystalline silicon solar cells
ECSS-E-ST-20- 2012 Space engineering - Photovoltaic EN 16603-20-08 2014
08C Rev.1 assemblies and components - Part 7.5.8:
Coating adherence (CA)
MIL.ST-883-K - Test Method Standard - Microcircuits - -
Method 2019.9 Die shear strength

IEC 62787 ®
Edition 1.0 2021-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Concentrator photovoltaic (CPV) solar cells and cell on carrier (CoC) assemblies –

qualification
Cellules solaires photovoltaïques à concentration (PVC) et ensembles de

cellules sur support (CoC) – Qualification

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 27.160 ISBN 978-2-8322-9326-3

– 2 – IEC 62787:2021 © IEC 2021
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Operating environment . 9
5 Sampling . 9
6 Marking . 10
7 Characterization methods for measuring the performance of bare cells and CoCs
subjected to qualification tests . 10
7.1 General . 10
7.2 Light I-V measurement . 10
7.3 Dark I-V measurement . 11
7.3.1 General . 11
7.3.2 Procedure . 11
7.4 Electroluminescence (EL) mapping . 11
7.5 X-ray and Scanning Acoustic Microscope (SAM) . 12
7.6 Visual inspection . 12
7.7 Thermal resistance measurement . 12
8 Pass criteria . 13
9 Documentation and reporting . 20
10 Modifications and requalification . 20
11 Qualification stress tests . 21
11.1 General . 21
11.2 ESD damage threshold . 21
11.2.1 General . 21
11.2.2 Purpose . 21
11.2.3 Procedure . 22
11.2.4 Requirements . 22
11.3 Front and back metal adhesion . 22
11.3.1 Purpose . 22
11.3.2 Procedure . 22
11.3.3 Requirements . 22
11.4 High-temperature storage . 22
11.4.1 Purpose . 22
11.4.2 Procedure . 22
11.4.3 Requirements . 23
11.5 Thermal cycling. 23
11.5.1 Purpose . 23
11.5.2 Procedure . 23
11.5.3 Requirements . 24
11.6 High temperature with current injection . 24
11.6.1 Purpose . 24
11.6.2 Procedure . 25
11.6.3 Requirements . 25
11.7 Low level light biased damp heat . 25
11.7.1 Purpose . 25

IEC 62787:2021 © IEC 2021 – 3 –
11.7.2 Procedure . 25
11.7.3 Requirements . 25
11.8 Solderability . 26
11.8.1 Purpose . 26
11.8.2 Procedure . 26
11.8.3 Requirements . 27
11.9 Illumination . 27
11.9.1 Purpose . 27
11.9.2 Procedure .
...