BS 62925:2017 pdf download – CONCENTRATOR PHOToVOLTAIC(CPV) MODULES – THERMAL cYCLING TEST TO DIFFERENTIATEI NCREASED THERMAL FATIGUE DURABILITY 1 Scope This document defines a test sequence that will quickly uncover CPV module failures thathave been associated with field exposure to thermal cycling for many years. This documentwas specifically developed to relate to thermal fatigue failure of the HCPV die-attach, however,it also applies，to some extent,to all thermal fatigue related failure mechanisms for theassemblies submitted to test. IEC 62108,the CPV module qualification test already includes an accelerated thermal cyclesequence in one leg of the testing，however，the parameters of that test only represent aqualification level of exposure. This test procedure applies more stress and will provide aroute for comparative testing to differentiate CPV modules with improved durability to thermalcycling and the associated mechanical stresses. Normative references The following documents are referred to in the text in such a way that some or all of theircontent constitutes requirements of this document. For dated references，only the editioncited applies. For undated references, the latest edition of the referenced document (includingany amendments) applies. IEC 62108:2016,Concentrator photovoltaic(CPV) modules and assemblies – Designqualification and type approval 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. IsO and lEC maintain terminological databases for use in standardization at the followingaddresses: . IEC Electropedia: available at http://www.electropedia.orgl . iso Online browsing platform: available at http://www.iso.orglobp 3.1 durability system’s capacity to resist degradation specific for a particular stress or set of stresses Note 1 to entry: The durability with respect to all relevant stresses shall be assessed in order to gain informationabout the anticipated performance of the system. 3.2 reliability probability for a system to perform and maintain its designed function in specific conditions fora specified period of time Note 1 to entry.: In this context the term reliability shall be accompanied by three numbers: a) a specified period oftime, b) a criterion that quantifies its performance at that time and c) the probability that the criterion will be met. 3.3 concentrator receiver group of one or more concentrator cells and secondary optics (if present) that acceptsconcentrated sunlight and incorporates the means for thermal and electric energy transfer.Areceiver could be made of several sub-receivers.The sub-receiver is a physically standalone,smaller portion of the full-size receiver [SOURCE: IEC 62108:2016,3.4] 3.4 concentrator module group of receivers，optics, and other related components,such as interconnection andmounting,that accepts unconcentrated sunlight. All above components are...
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