延长光伏组件的热循环 试验程序

[中文适用范围]： 本文件定义了扩展 IEC 61215-2 热循环测试的测试序列。它旨在区分具有更高热循环耐久性的光伏模块，并评估部署在最容易受到热循环类型应力1的位置的模块。本文件基于提交本次测试的样品所代表的 95% 模块能够通过 IEC 61215-2:2016@ 4.11.3@ 中定义的等效 500 次热循环@，最大功率衰减为低于 5%。还提供了通过增加最大循环温度和/或提交测试的模块数量来减少总体测试时间的措施。本文件中的测试程序是基于对玻璃覆板型封装中晶体硅太阳能电池上锡铅焊料键合应力的分析而制定的。无铅焊料的变化会对加速因素产生影响，但不足以改变该测试的总体结果。具有集成电池互连的单片型模块不会遭受这种特定类型的应力，但模块内仍然存在电连接，例如集成电池电路和模块母线之间可能会因热循环而磨损。柔性模块（无玻璃）的受力方式与具有玻璃覆盖层或基板@的模块不同，因此本文件中采用的等效系数可能不适用于这些模块。 1 附件 B 中提供了评估目标部署位置是否需要进行此项测试的指南。 [外文原描述]： IEC 62892:2019 defines a test sequence that extends the thermal cycling test of IEC 61215-2. It is intended to differentiate PV modules with improved durability to thermal cycling and evaluate modules for deployment in locations most susceptible to thermal cycling type stress. This document is based on the ability for 95 % of the modules represented by the samples submitted for this test to pass an equivalency of 500 thermal cycles, as defined in IEC 61215‑2:2016, 4.11.3, with a maximum power degradation of less than 5 %. Provisions are also provided to reduce overall test time by increasing the maximum cycle temperature and/or the number of modules submitted for test. The test procedure in this document was developed based on analysis of the stress on tin-lead solder bonds on crystalline silicon solar cells in a glass superstrate type package. Changes to lead-free solder have an effect on the acceleration factors but not enough to change the overall results of this test. Monolithic type modules with integral cell interconnection do not suffer from this specific type of stress but there are still electrical connections within the module, for example between the integrated cell circuit and the module bus bars, that may be subject to wear out from thermal cycling. Flexible modules (without glass) are not stressed in the same way as those with glass superstrates or substrates, therefore use of the equivalency factor employed in this document may not be applicable to these modules.