A new acceleration model for the reliability prediction of electrical connectors has recently been published. This model enables the evaluation of failure rates gained in highly accelerated life tests (HALT) and considers thermal and vibrational loading. However, since the initial study only covered a small set of test parameters, further study of the model is required. Previous studies have sufficiently investigated the influence of the vibration test mode on the failure rate of electrical connectors. Therefore, this study now focuses on the influence of the thermal cycling test. A commonly used automotive connector is chosen and subjected to stresses in HALT covering various upper temperatures, test durations and thermal cycling frequencies. Additionally, the principles of determining the coefficient of temperature difference and the coefficient of the thermal cycling frequency are presented, since these coefficients are connector specific and required for the acceleration model. Based on the numbers of failures in test, the influence of the various thermal cycling tests is discussed, and the coefficients are calculated for the chosen connector. In conclusion a guideline to select an appropriate upper temperature and test duration in order to compare the reliability of different electrical connectors is provided.

最近发布了一种用于电连接器可靠性预测的新加速模型。该模型可以评估在高加速寿命测试 (HALT) 中获得的故障率，并考虑热载荷和振动载荷。然而，由于最初的研究只涵盖了一小部分测试参数，因此需要对该模型进行进一步研究。以前的研究已经充分研究了振动测试模式对电连接器故障率的影响。因此，本研究现在重点关注热循环测试的影响。选择常用的汽车连接器并在 HALT 中承受各种上限温度、测试持续时间和热循环频率的应力。此外，给出了确定温差系数和热循环频率系数的原理，因为这些系数是连接器特定的并且是加速模型所必需的。根据测试中的故障次数，讨论了各种热循环测试的影响，并计算了所选连接器的系数。总之，提供了选择合适的上限温度和测试持续时间的指南，以便比较不同电连接器的可靠性。并为所选连接器计算系数。总之，提供了选择合适的上限温度和测试持续时间的指南，以便比较不同电连接器的可靠性。并为所选连接器计算系数。总之，提供了选择合适的上限温度和测试持续时间的指南，以便比较不同电连接器的可靠性。