IEC 62788-2-1_2023光伏前板_背板新标解读及解决方案介绍（英文）-帖克清.docx

IEC62788-2-1:2023

光伏前板/背板新标解读及解决方案介绍

JohnTie/帖克清

德国莱茵TüV太阳能及商用产品服务

b1)

b1)coatedmulti-layerb2)laminatedmulti-layerb3)multi-layerwithconductivelayer

ConstructionsofFrontsheetorBacksheetFilm

a)Singe-layer

a)Singe-layer

a1)monolithiclayera2)combinedlayer(co-extruded)

b)Multi-layer

b)Multi-layer

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BreakdownVoltageforreinforced

BreakdownVoltageforreinforcedinsulation(2000V+4timessystemvoltage),bothfreshandaged.

Fora1),single-layersheet:shallhaveaminimumthicknessof30μmevenforsystemvoltages600V

Fora2),singlecombinedlayer:theminimumthicknessof30μmforsystemvoltages600Vdoesnotapplytoanindividualsublayer.

TIorRTE(RTI)underadditionalconsiderationofthermalendurance

ConstructionsofFrontsheetorBacksheetFilm

Insulationthickness--thelayerscontributingtotherelieduponinsulation

a)Singe-layer

shallmeettherequirementforDTI

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Testitems

?FBST01Visual

?FBST01Visualinspection

Visual

?

?FBST03Breakdownvoltage

?FBST04Distancethroughinsulation(DTI)

?FBST05Materialgroup(CTI)

Electricalcharacteristics

?

?FBST06Thermalendurance

(TIorRTE(RTI);Thermalfailsafetest)

Thermalcharacterization

?FBST02Tensile

?FBST02Tensileproperties

Mechanicalcharacteristics

?

?FBST07Damp-Heat(DH)testing

?FBST08UVweatheringtest

Acceleratedageingtest

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FBST01-Visualinspection

?30cmto50cmviewingdistance

?Underilluminationlevelsofatleast1000lx

cleanandsmoothsurfacelayers

cleanandsmoothsurface

impuritiesorsignificantdefectde-lamination(formulti-layer

impuritiesorsignificantdefect

bubblescracks

bubbles

wrinkles

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FBST02–Tensileproperties

passThematerials

pass

–if–if

rσB≥50%(retainedtensilestrength)isobtainedaftertest,andεB≥25%(absoluteelongationatbreak)isobtainedaftert