Characterization and Thermal Behavior of Battery Model Parameters
Caio Luiz Gomes de Sousa Alves1; Rafael de Melo Silva Santos1; Juan Moises Mauricio Villanueva1; Euler Cássio Tavares de Macêdo1
1 Universidade Federal da Paraíba
Baixar PDF doi:10.20906/CPS/CBA2018-1347
Resumo
The Lithium-ion battery cell are electrochemical elements widely used in application that requires a high energy density and a compact element, all these characteristics are better implemented for electric vehicle applications. It is known that some factors are harmful to the battery degrading it faster and not being efficient as expected, one of the factor is the temperature. With the goal to know the battery behavior and to prevent possible failures, electric models of the battery are developed. Using an automatic setup to measure the quantities, it was made experimental procedures to define the capacity behavior of the battery in relation to temperature, using a constant current to realize the experiment, and to define the electric model parameters, doing the experiment with pulsed current, with these model parameters are possible to analyze the uncertainties associated to them making relation with temperature. Experimental results from the battery were obtained through the charge and discharge procedure for the temperature of $10^{\circ}C$ and $40^{\circ}C$, determining the variations of the parameters of the battery in relation to the temperature. In this paper, it was possible to determine the minimal number of branches for electric model to require less computational effort, being analyzed the relation between the R-C parameters of the electric model with the temperature along the State-of-Charge (SoC), where we could concluded that the battery suffers losses in your capacity when it is used in low temperature which does not occur to high temperature.
Palavras-chave: Lithium-ion Battery; Electric Model; Uncertainties; Parameter Identification