Zhurnal Radioelektroniki - Journal of Radio Electronics. eISSN 1684-1719. 2021. No. 4
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DOI https://doi.org/10.30898/1684-1719.2021.4.15

UDC 681.518.3

 

Specificity of solar cells thermal resistance measurement

 

V. I. Smirnov 1,2, V. A. Sergeev 1,2, A. A. Gavrikov 1

1 Ulyanovsk branch of Kotelnikov Institute of Radio-Engineering and Electronics of Russian Academy of Science, Goncharova 48/2, Ulyanovsk 432071, Russia

2 Ulyanovsk State Technical University, Severny Venets 32, Ulyanovsk, 432027, Russia

 

The paper was received on April 15, 2021 

 

Abstract. The results of power solar batteries' thermal resistance measurements are described. A distinctive feature of such batteries is the high heat capacity of the semiconductor material, as well as the high total electrical capacity of p-n-junctions.  This complicates the thermal resistance of the measuring process, based on heating the object by the heating current pulses and measuring the temperature of the p-n-junction in the pauses between pulses. To measure the thermal resistance of power solar battery the modulation method was used, a device under test (DUT) heated with current pulses with duration modulated harmonically. The response to the heat (a variable component of the p-n-junction temperature) is measured in the pauses between the pulses. To detect the thermal resistance component junction-to-case, the dependence of the thermal impedance on heating power modulation frequency was measured. In the measured dependence, a frequency range is found when the real part of the thermal impedance value remains constant. This allows the determining of the "junction-to-case" thermal resistance component. Were made estimates of the duration of a single measurement of thermal resistance and a conclusion about the possibility of implementing selective technological control of this parameter in the production of powerful solar cells.

Keywords: power solar battery, thermal resistance, modulation method, measurement time, technological control.

References

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For citation:

Smirnov V.I., Sergeev V.A., Gavrikov A.A. Specificity of solar cells thermal resistance measurement. Zhurnal Radioelektroniki [Journal of Radio Electronics]. 2021. No.4. https://doi.org/10.30898/1684-1719.2021.4.15 (In Russian)