Study On The Electromechanical Response Characteristics Of Solar Arrays Irradiated By Pulsed Laser And Simulated Sunlight

Spacecraft solar panels face complex space radiation environment and possible encounter laser weapons,high-energy particles by ionization or bombardment of atomic displacement damage spacecraft solar cell surface materials,pulsed laser can effectively simulate space high-energy particles,high-energy particle streams and laser weapons on solar cell radiation effect.Therefore,in this paper,the irradiation effect of space high-energy particles on solar cell array was carried out by pulsed laser irradiation solar cells,and the influence of laser power and pulse width on the temperature field distribution and electrical output characteristics of solar cells was obtained,and the thermal field numerical simulation of laser irradiated solar cells was realized by COMSOL Multiphysics,and the thermal stress evolution law of laser irradiated solar cells was obtained.The main research contents and achievements are as follows:(1)The irradiation effect and test system of pulsed laser irradiation solar cells were built,and the correlation law between laser irradiation parameters and temperature evolution and electrical output characteristics of solar cells was obtained through the acquisition of solar cell surface temperature and measurement of electrical output characteristics,and the results showed that the surface temperature of solar cells increased with the increase of laser output power and pulse width,on the contrary,the load voltage of solar cells decreased with the increase of laser power and pulse width.(2)Experimental research on the influence of laser irradiation position on the electrical output characteristics and temperature evolution of solar cells was carried out,and the results showed that under the irradiation condition of laser output power of 24.11 W and pulse width of 9ms,laser irradiation was carried out on the non-grid part of solar cells.When the pulsed laser irradiation moment is 13.8s,the monocrystalline silicon solar cell is broken down,and the output voltage of the solar cell is slightly higher than 0.4V;when the laser focusing position is located on the battery grid line,the battery is broken down when the same parameter pulse laser irradiation is 5.102 s,and the voltage across the load is reduced from0.45 V to 0V.(3)The temperature field and electrical output evolution characteristics of pulsed laser and equal energy continuous laser irradiation solar cells were carried out respectively,so as to obtain the difference in irradiation effect of pulsed and continuous laser on solar cells.The results show that under the same irradiation conditions,the continuous laser will cause more serious thermal damage to the battery than the pulsed laser.Through the analysis of the damage morphology map of the laser irradiation point by electron microscope,it is concluded that the main form of damage of continuous laser to solar cells is hot melt damage.The damage of pulsed laser to solar cells mainly depends on the peak power density,and the damage is manifested in the form of glass cover sheet fragmentation,perforation,hot melt and silicon material damage caused by thermal stress.(4)The numerical simulation of the thermal field of laser-irradiated monocrystalline silicon solar cells was realized by COMSOL Multiphysics,and the thermal stress evolution law of pulsed laser-irradiated solar cells was obtained.The results show that the thermal field of pulsed laser irradiation solar cells is distributed in a circular circle with the center point of the spot as the center,and the farther away from the center point of the spot,the smaller the thermal stress.The thermal stress distribution in the direction of the vertical and parallel solar cell grid lines shows a pulsed waveform.The greater the output power of the continuous laser,the greater the thermal stress at the center of the spot at the same time of irradiation.