Test Bench for the Characterization of Batteries for Use in SAPS

AbstractThis article presents the development of a test bench for the characterization of batteries for solar uses as well as results of tests conducted using solar batteries. The test bench comprises three main blocks: the thermal module, the power supply and the measuring module. The thermal module consists of a thermally regulated bath with a heating and cooling system capable of maintaining a constant working temperature with an accuracy of ± 0.3°C. The power supply is a bipolar Kepco, BOP 36-12D that allows charging and discharging of batteries with a control unit that allows its automatic operation. Finally, the measuring system comprises a set of sensors and circuits with the capability of logging battery voltage, charge / discharge current, density and temperature. All these variables are measured with an error lower than that specified by the standard IEC 61427 - 2005. Gathered data are transmitted to a PC where they are recorded and displayed in real time. The software supports various charge / discharge profiles with different values of the current, the bath temperature and test duration hence allowing the possibility of cyclic testing.The test bench developed is currently the first of its kind in the country with the capability to comply with standards as to the characterization of solar batteries is concerned