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BS EN IEC 62787:2021

BS EN IEC 62787:2021

$167.15

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

Published By Publication Date Number of Pages
BSI 2021 40
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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.

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PDF Pages PDF Title
2 undefined
5 Annex ZA(normative)Normative references to international publicationswith their corresponding European publications
7 English
CONTENTS
9 FOREWORD
11 1 Scope
2 Normative references
12 3 Terms and definitions
13 Figures
Figure 1 – Schematics and photos of Cells on Carrier and bare cell test assembly
14 4 Operating environment
5 Sampling
Figure 2 – Representative samples of CPV systems, where cells and CoCs are deployed
15 6 Marking
7 Characterization methods for measuring the performance of bare cells and CoCs subjected to qualification tests
7.1 General
7.2 Light I-V measurement
16 7.3 Dark I-V measurement
7.3.1 General
7.3.2 Procedure
7.4 Electroluminescence (EL) mapping
17 7.5 X-ray and Scanning Acoustic Microscope (SAM)
7.6 Visual inspection
7.7 Thermal resistance measurement
18 8 Pass criteria
19 Tables
Table 1 – Qualification tests description for bare solar cells
21 Table 2 – Qualification tests description for CoCs
23 Figure 3 – Flow chart of qualification tests for bare solar cells
24 Figure 4 – Flow chart of qualification tests for CoCs
25 9 Documentation and reporting
10 Modifications and requalification
26 11 Qualification stress tests
11.1 General
11.2 ESD damage threshold
11.2.1 General
11.2.2 Purpose
27 11.2.3 Procedure
11.2.4 Requirements
11.3 Front and back metal adhesion
11.3.1 Purpose
11.3.2 Procedure
11.3.3 Requirements
11.4 High-temperature storage
11.4.1 Purpose
11.4.2 Procedure
28 11.4.3 Requirements
11.5 Thermal cycling
11.5.1 Purpose
11.5.2 Procedure
Table 3 – Thermal Cycle Options (TCO) of test 11.5 for CoCs
29 11.5.3 Requirements
11.6 High temperature with current injection
11.6.1 Purpose
Figure 5 – Thermal Cycle Diagram for the CoC test and TCO-1
30 11.6.2 Procedure
11.6.3 Requirements
11.7 Low level light biased damp heat
11.7.1 Purpose
11.7.2 Procedure
11.7.3 Requirements
31 11.8 Solderability
11.8.1 Purpose
11.8.2 Procedure
32 11.8.3 Requirements
11.9 Illumination
11.9.1 Purpose
11.9.2 Procedure
33 11.9.3 Requirements
11.10 Wire/Ribbon bond strength
11.10.1 Purpose
11.10.2 Procedure
34 Figure 6 – Force diagram in the bond strength test(taken from IEC 60749-22:2002, Annex A, Method B)
Table 4 – Minimum pulling forces, PW (taken from IEC 60749-22:2002, Method B)
35 11.10.3 Requirements
Figure 7 – Minimum bond pull limits (normal to die)(taken from IEC 60749-22:2002, Annex A, Method B)
36 11.11 Die adhesion
11.11.1 Purpose
11.11.2 Procedure
11.11.3 Requirements
Figure 8 – Schematic of the test set up for the die adhesion test
37 11.12 Connector shear strength
11.12.1 Purpose
11.12.2 Procedure
Figure 9 – Die shear strength criteria (minimum force versus die attach area)(taken from MIL.ST-883-K)
38 11.12.3 Pass/fail criteria
11.13 Bypass diode shear strength
11.13.1 Purpose
11.13.2 Procedure
11.13.3 Requirements
Figure 10 – Schematics of the position of the pushing tool(taken from IEC 6213712:2007)

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BS EN IEC 62787:2021
$167.15