Vehicle auxiliary energy supply device based on composite solar module 2019-01-1258
The degree of electrification of vehicles is gradually increasing and the demand for electric energy is increasing. The solar energy is clean, rich and widely distributed, but the photoelectric conversion efficiency of photovoltaic cells is low. In this paper, a composite vehicle-mounted solar module integrating photovoltaic and thermoelectricity is designed. According to the spectral absorption characteristics of photovoltaic cells and solar selective absorbing coatings. The sunlight that cannot be absorbed by the photovoltaic cell is fully used for collecting heat, and the generated high-temperature heat energy is transmitted to the hot end of the thermal electric generator (TEG) by using heat pipes, and the TEG cold end is connected to the vehicle body through the heat pipe for cooling to achieve temperature difference power generation. It improves the comprehensive utilization efficiency of the solar energy within the limited range of the roof and provide energy supply for the vehicle. Based on the photoelectric conversion model and the photothermal thermal model, the effects of solar illuminance, ambient temperature and air velocity on the energy conversion effect are analyzed. Combined with the TEG heat source characteristics and cold source characteristics, the integration characteristics of photovoltaic modules and thermoelectric modules were studied. Compared with the use of photovoltaic cells alone, the conversion efficiency of the composite solar module has been improved. The electric energy output from the module can be used for the use of vehicle-mounted electrical appliances, which can reduce the demand for battery power to extend the mileage of electric vehicles and will promote the development of electric vehicles and meet the trend of energy saving and emission reduction.