IEC 62788-1-6-2017 Measurement procedures for materials used in photovoltaic modules - Part 1-6 Encapsulants - Test methods for determining the degree of cure i.pdf

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1、 IEC 62788-1-6 Edition 1.0 2017-01 INTERNATIONAL STANDARD NORME INTERNATIONALE Measurement procedures for materials used in photovoltaic modules Part 1-6: Encapsulants Test methods for determining the degree of cure in Ethylene-Vinyl Acetate Procdures de mesure des matriaux utiliss dans les modules

2、photovoltaques Partie 1-6: Encapsulants Mthodes dessai pour dterminer le degr de durcissement dans lthylne-actate de vinyle IEC 62788-1-6:2017-01(en-fr) colour inside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2017 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no p

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20、 STANDARD NORME INTERNATIONALE Measurement procedures for materials used in photovoltaic modules Part 1-6: Encapsulants Test methods for determining the degree of cure in Ethylene-Vinyl Acetate Procdures de mesure des matriaux utiliss dans les modules photovoltaques Partie 1-6: Encapsulants Mthodes

21、dessai pour dterminer le degr de durcissement dans lthylne-actate de vinyle INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE ICS 27.160 ISBN 978-2-8322-3857-8 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Elect

22、rotechnique Internationale Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agr. colour inside 2 IEC 62788-1-6:2017 IEC 2017 CONTENTS FOREWORD . 4 1 Scope 6 2 Normative re

23、ferences 6 3 Terms and definitions 7 4 Principle 7 5 DSC secondary method . 8 5.1 Instrument and equipment for the secondary method 8 5.1.1 General . 8 5.1.2 Electronic balance . 8 5.1.3 Differential scanning calorimeter 8 5.1.4 Instrument calibration 8 5.2 Specimen preparation for the secondary met

24、hod. 9 5.2.1 Sampling and storage 9 5.2.2 Preparation procedures . 9 5.3 Test requirements for the secondary method 9 5.3.1 Environment requirements . 9 5.3.2 Parameter settings (residual enthalpy method) 10 5.3.3 Parameter settings (melt/freeze method) . 10 5.3.4 Parameter settings (combined enthal

25、py and melt/freeze method) 10 5.4 Test procedure for the secondary method . 11 5.5 Calculation and expression of the results for the secondary method . 11 5.5.1 Enthalpy method 11 5.5.2 Melt/freeze method 12 5.6 Uncertainty of measurements for the secondary method . 16 6 The primary method . 16 6.1

26、Principle for the primary method . 16 6.2 Instrument and equipment for the primary method 17 6.2.1 Electronic balance . 17 6.2.2 Soxhlet extractor . 17 6.2.3 Thimble . 17 6.2.4 Heating apparatus . 17 6.2.5 Handling apparatus 18 6.2.6 Solvent 18 6.3 Specimen preparation for the primary method . 18 6.

27、3.1 Sampling and storage 18 6.3.2 Preparation procedures . 18 6.4 Test requirements for the primary method Environment requirements 19 6.5 Test procedure for the primary method 19 6.6 Calculation and expression of the results for the primary method 19 7 Test report . 19 Annex A (informative) Limitat

28、ions of the primary and secondary measurement methods21 Bibliography 23 Figure 1 Example result for the DSC residual enthalpy method 12 IEC 62788-1-6:2017 IEC 2017 3 Figure 2 Location of temperatures and temperature ranges used in the melt/freeze DSC method . 13 Figure 3 Example of the temperature b

29、ounds applied for an automated software integration algorithm . 14 Figure 4 Representation of the measurement profile for an EVA test specimen 16 Table 1 Summary of the results for the example measurements shown in Figure 2 14 4 IEC 62788-1-6:2017 IEC 2017 INTERNATIONAL ELECTROTECHNICAL COMMISSION _

30、 MEASUREMENT PROCEDURES FOR MATERIALS USED IN PHOTOVOLTAIC MODULES Part 1-6: Encapsulants Test methods for determining the degree of cure in Ethylene-Vinyl Acetate FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national

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40、ited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identif

41、ying any or all such patent rights. International Standard IEC 62788-1-6 has been prepared by IEC technical committee 82: Solar photovoltaic energy systems. The text of this standard is based on the following documents: FDIS Report on voting 82/1197/FDIS 82/1231/RVD Full information on the voting fo

42、r the approval of this International Standard can be found in the report on voting indicated in the above table. This document has been drafted in accordance with the ISO/IEC Directives, Part 2. A list of all parts in the IEC 62788 series, published under the general title Measurement procedures for

43、 materials used in photovoltaic modules, can be found on the IEC website. IEC 62788-1-6:2017 IEC 2017 5 The committee has decided that the contents of this document will remain unchanged until the stability date indicated on the IEC website under “http:/webstore.iec.ch“ in the data related to the sp

44、ecific document. At this date, the document will be reconfirmed, withdrawn, replaced by a revised edition, or amended. IMPORTANT The colour inside logo on the cover page of this publication indicates that it contains colours which are considered to be useful for the correct understanding of its cont

45、ents. Users should therefore print this document using a colour printer. 6 IEC 62788-1-6:2017 IEC 2017 MEASUREMENT PROCEDURES FOR MATERIALS USED IN PHOTOVOLTAIC MODULES Part 1-6: Encapsulants Test methods for determining the degree of cure in Ethylene-Vinyl Acetate 1 Scope This part of IEC 62788 def

46、ines the terminology, test equipment, test environment, specimen preparation, test procedures, and test report for measuring the degree of cure of Ethylene-Vinyl Acetate (EVA) encapsulation sheet used in photovoltaic (PV) modules. The differential scanning calorimetry (both residual enthalpy and mel

47、t/freeze protocols) and gel content methods are included herein. This procedure can be used by material- or module-manufacturers to verify that the cross-linking additive is present and is active. The procedure can also be used to verify the module manufacturing (lamination) process for the purposes

48、 of quality- and process-control. The procedure can also be used to assess the uniformity of the EVA formulation within a roll as well as to compare variation of the EVA formulation from roll to roll. This procedure can be applied to uncured or recently cured EVA sheet as well as uncured or recently

49、 cured EVA from PV modules. This test procedure can also be applied to cross-linking ethylenic co-polymers other than EVA. The temperatures identified for the calorimetry measurements in this procedure have been optimized for EVA. Therefore, if the test procedure is applied to other encapsulation materials, the range of the test temperatures can have to be adjusted based on the active temperat