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为了得到太阳电池板在热真空试验降温时的正、背面温差和温度变化规律,文章建立了太阳电池板的热物理模型,根据太阳电池板厚度、背面发射率、纵向当量导热系数、高温平衡时的正面温度以及热沉温度,推算出电池板在高温平衡时的背面温度,进而得出电池板的正、背面温差;采用集总参数法进行分析,得出电池板降温时的降温时间表达式及电池板温度与时间的关系式;经过理论计算与试验数据的对照分析表明,降温时间理论表达式可以近似作为电池板降温时间的预测依据。研究结果可以为电池板热真空试验的热分析、电池板降温过程预测以及低温控制提供参考。
In order to obtain the regularity of the temperature difference between the front and the back of the solar panel during the thermal vacuum test, the thermal physical model of the solar panel is established. According to the thickness of the solar panel, the emissivity of the back surface, the vertical equivalent thermal conductivity, Of the front temperature and heat sink temperature, calculate the back of the battery at high temperature equilibrium temperature, and then draw the temperature difference between the front and back of the panel; using the lumped parameter method to analyze, draw the cooling time of the battery cooling time expression And the relationship between the temperature and time of the solar panel. Comparing the theoretical calculation with the experimental data, the theoretical expression of the cooling time can be approximated as the prediction basis of the cooling time of the solar panel. The results can provide reference for thermal analysis of panel thermal vacuum test, panel cooling process prediction and low temperature control.