Modeling of solar batteries operating modes

Abstract

For the solar power engineering development it is essential to determine the photovoltaic plant energy indicators by modeling the solar batteries operating modes. To obtain an adequate solar battery model, we need to determine its main parameters on the basis of an equivalent electric circuit. Modeling the solar battery operating mode, it is necessary to take into account the influence of its heating temperature. We propose a combined research algorithm in MS Excel with the installed add-on “Search for a solution” for modeling of solar battery operating mode. We have given the results of modeling the solar battery operating mode where the calculated solar battery maximum power including its heating, satisfactory matches with the experimental data. The research shows that excluding the solar battery heating, the maximum power value and, accordingly, its efficiency are overestimated in comparison with the experimental data. Moreover, the results of modeling excluding its heating do not provide the required accuracy and the modeling mistakes are more than 30% especially at relatively high values of solar radiation. The given model allows to determine the equivalent circuit parameters and determine the solar battery maximum power depending on the considered factors of its heating temperature and the incoming solar energy.

Integrated Solar Batteries: Design and Device Concepts

“…100%) . For an efficient operation, both battery cell voltage and maximum power point of the solar cell as well as charging currents need to match . Dai and co-workers used a stack of four perovskite solar cells (CH 3 NH 3 PbI 3 as active material), which generates a charging voltage of approximately 3 Vsufficient to charge an LFP (LiFePO 4 cathode) Li-ion battery with an overall efficiency of 7.80% .…”

“…7 For an efficient operation, both battery cell voltage and maximum power point of the solar cell as well as charging currents need to match. 8 Dai and co-workers used a stack of four perovskite solar cells (CH 3 NH 3 PbI 3 as active material), which generates a charging voltage of approximately 3 V� sufficient to charge an LFP (LiFePO 4 cathode) Li-ion battery with an overall efficiency of 7.80%. 9 Qiao and co-workers achieved an overall efficiency of 9.36% with a perovskite solar cell (with η PV ≈ 14%) charging an LCO (LiCoO 2 as cathode) Li-ion battery via a DC−DC converter (efficiency of approximately 88%).…”

The Use of Photovoltaic Cells for Autonomous Power Supply of Radio Electronic Devices on the Example of a Wi-Fi Router

“…Чаще всего встречаются значения в 12, 24 и 48 В. Следующим шагом после определения напряжения является определение необходимой энергии в виде произведения тока и среднего времени функционирования, измеряемого в ампер-часах. В случае потребления нагрузкой постоянного тока необходимая суточная энергия (в ватт-часах) определяется произведением номинальной мощности и времени функционирования за сутки [1,2].…”