Cálculo da vida útil e degradação de baterias ocasionada por repetidos ciclos através do método Rainflow Couting

Abstract

Last decades were marked by the growth in the use of renewable sources combined with existing energy sources. A major reason behind the progress in this area is the environmental issue, as some countries are already trying to reduce pollution rates and thus slow down global warming. That said, the use of batteries has also grown, since they are important for a variety of applications that also make use of renewable sources and allow reducing problems that the high insertion of renewable sources can cause on grid. Considering these factors, a study on the use of batteries and their degradation caused by repeated cycling was carried out, more specifically for lithium, lead-acid, sodium sulfur and flux batteries. In this study, the Rainflow Counting method is used to count the cycles that the battery performs in a residential environment, together with photovoltaic panels. From the data collected by the rainflow method, an equation is applied to obtain the partial and total battery degradation. In addition, a battery discharg control methodology was considered for analysis of economic feasibility and preservation o battery life. It is expected that using the battery in a more controlled way will lead to a gain in terms of lifespan, suffering less daily degradation. The results were obtained through simulations, and multiple software were used.