通过脉冲测试快速确定热电模块可靠性的方法

T. Ritzer
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引用次数: 1

摘要

热电模块(tem)的用户和制造商对可靠产品的需求日益增长。随着制造的tem数量的增加,需要一种更快的可靠性测试方法,以最大限度地降低成本,同时确保产品的整体质量。典型的可靠性测试方法可能需要长达3-4个月的时间来确定TEM的预计使用寿命。在许多情况下,直到现在,还没有足够的时间或资源来对不断增长的tem制造数量进行鉴定。TE技术公司开发了一种脉冲测试方法,可以快速确定TEM中最关键部件的完整性。该测试过程包括通过TEM施加高强度但持续时间很短的交流脉冲。这种能量爆发优先产生热量,精确地指向整个TEM中可能存在的高接触电阻。这些“热点”可以通过应用于外部陶瓷的热成像方法观察到。因此,TEM中的每个结都要进行测试。对这些热图像的分析用于识别潜在的未来故障。将提供试验数据,将脉冲试验的结果与长期常规可靠性试验的结果相关联。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Quick method for determining the reliability of a thermoelectric module via pulse testing
Users and manufacturers of thermoelectric modules (TEMs) are experiencing increasing demand for reliable products. As the volumes of manufactured TEMs increase, the need for a faster method of reliability testing is essential to minimize costs while ensuring the overall quality of the product. The typical methods of reliability testing can take as many as 3-4 months to determine the projected operational life of a TEM. In many cases, there is not enough time or resources to qualify the growing manufactured quantities of TEMs, until now. TE Technology has developed a pulse test method to quickly determine the integrity of the most crucial components within the TEM. This test process consists of applying a high magnitude, but very short duration, AC pulse through a TEM. This energy burst preferentially generates heat, pin-pointed wherever high contact resistance may be present throughout the TEM. These "Hot Spots" can be observed through thermal imaging methods applied to the exterior ceramics. Thus, every junction in the TEM is tested. Analyses of these thermal images are used to identify potential future failures. Test data will be presented to correlate the results of the pulse tests with those obtained from longer term, conventional reliability testing.
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