基于Arrhenius模型的汽车电子产品加速寿命试验设计分析

目的对Arrhenius模型的基本方程进行分析,为评估产品热应力水平提供试验设计方法。方法推导寿命周期中多个温度点的加速因子和加速寿命试验时间,并计算其等效温度点与寿命周期中各点温度和时间的关系,得出等效温度的计算公式。结果根据汽车电子产品温度的正态分布规律,计算等效温度点曲线,作为汽车电子加速寿命试验的输入,通过算例说明与传统试验方法的差异性。结论等效温度点法比传统试验方法更适应于各种温度分布,可以更准确地评估产品热应力水平。

Design of Accelerated Life Test for Automotive Electronics Based on Arrhenius Model

Objective To analyze the basic equations of the Arrhenius model and provide experimental design methods for evaluating the thermal stress level of products. Methods The acceleration factor and the accelerated life test time of several temperature points in the life cycle were derived, and the relationship between the equivalent temperature point and the temperature and time of each point in the life cycle was calculated. Results According to the normal temperature distribution of automotive electronic products, the equivalent temperature point curve was calculated as the input of automotive electronic acceleration life test to demonstrate the difference with the traditional test methods through examples. Conclusion The equivalent temperature point method is more suitable for all kinds of temperature distribution than the traditional method and can evaluate the thermal stress level of products more accurately.