IEC 62892:2019 延长光伏组件的热循环 试验程序

标准编号：IEC 62892:2019

中文名称：延长光伏组件的热循环 试验程序

英文名称：Extended thermal cycling of PV modules - Test procedure

发布日期：2019-04-17

标准范围

IEC 62892:2019定义了扩展IEC 61215-2热循环测试的测试序列。它旨在区分具有改进的热循环耐久性的光伏模块，并评估模块在最容易受到热循环类型应力影响的位置的部署。根据IEC 61215的定义，本文件基于提交本试验的样品所代表的95%的模块通过等效500次热循环的能力？2:20 16，4.11.3，最大功率衰减小于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测试时间的规定。本文件中的测试程序是基于对玻璃覆盖层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开发的。无铅焊料的变化对加速因子有影响，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，但是在模块内仍然存在电连接，例如在集成电池电路和模块汇流条之间，其可能受到热循环的磨损。柔性模块（无玻璃）的受力方式与具有玻璃覆盖层或衬底的模块不同，因此本文档中采用的等效系数可能不适用于这些模块。

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.

标准预览图