New Thresher Test.ppt [Compatibility Mode]-豆柴文库

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文本预览

Thefutureisbright

TheThresherTest
WuYaozhong---PVdepartment
Topics


1.Introduction

2.TheThresherTestSequence

3.OtherReliabilityPrograms

4.TheThresherMark

5.OutdoorValidation


TÜVSÜD
Introduction

PVReliabilityProgram-ThresherTest

Whatisit?
•Qualificationprogrambasedonextendedtestingprotocol
•FocusedoncriticalFailureModesforc-Simodules

Scope
•ProvidemuchhigherconfidenceinlifetimepredictionthanIEC61215+IEC61730

How?
•Byprovidingfurtherinsighton1)FailureMechanisms
2)PowerDegradationPatterns
3)SafetyDegradationPatterns
Why?
FailureratesinIECtestinghavedecreasedbutbuyerswhishahigherlevelof
confidence

TÜVSÜD3
Introduction

PVReliabilityProgram-ThresherTest

•ItisNOTanacceleratedlifetimetest,butausefuldiagnostictooltolifetime
criticalities.

•Usefultooltoobservethe“degradationpatterns”overtime:

Pmax,leakagecurrent,Rs,Rsh,insulationresistance.

•Whiletheperformanceofmodulesundergoingthisprotocoldoesnotquantify,
nordoesitcertifymodulelifetimeinthefield,theinformationobtainedthereinis
averyusefulinsightonreliabilitycriticalitiesofdifferenttechnologies,inan
acceleratedmannerandonaquantitativebasis.


TÜVSÜD4
Introduction

PVReliabilityProgram-ThresherTest


WhataretherequirementstoobtaintheThresherMark?

•Modulesalreadycertifiedacc.toIEC61215+IEC61730-1,-2
(certificationstillvalid)

•ModulesshallundergoThresherTestsequencessuccessfully

•FactoryInspection–additionalfocusoninternalreliabilityprograms


TÜVSÜD5
TheThresherTestSequence

DiagnosticApproachtoLifetime

SymptomsEffectsCause

•DiagnosticMetrics•CriticalFailureModes•Extended
EnvironmentalTests
•10.1(EL)•Brokeninterconnects
•10.2&10.7•Cellcracks•TC600
•10.3•Solderbondfailures•DH3000
•10.8•Delamination•UV45+HF30
•10.9•Corrosion•HotSpot5times
•10.15•Encapsulant•PID
•10.16discoloration
•10.18•Mechanicalfailures
•Electrical(jbox,conn.)
•Thermal(hotspot)
•Thermal(bypass
diode)


TÜVSÜD6
TheThresherTestSequence


Preconditioning
20kW/m2
Visualinspection
10.1+EL
Performancetest
10.2&10.7
Insulationtest
10.3
W