FREITAS, D. C. C.; http://lattes.cnpq.br/8110742001841238; FREITAS, David Ciarlini Chagas.
Resumo:
The present dissertation presents contributions to the electrical and to the lead acid
lifetime model. Five contributions are presented: the rst four of the electric model and
the fth, and last, the lifetime model: I) the selection of the point after discharge decay
curve for a speci c case. By using this method is possible an estimate of good quality,
compared to using an iterative non-linear optimization method. II) the selection of the
point after decay of discharge curve for di erent state of charge values. With this method
it is possible to determine the choice of the third point based on the charge and discharge
current pro le in which the battery is subjected; III) the estimation of the DC resistance
by the model equations in the study. The estimation quality is compared to the given
resistance calculation method for two standards. IV) the choice of the ltered current time
constant. This choice varies for each lead-acid battery and should not be predetermined.
V) the widespread degradation equation of lifetime model to contemplate any lead-acid
battery. The change makes the lifetime of any lead-acid battery to be calculated, as long
as they do obtain the necessary parameters. All approaches were tested by computer
simulations and proven by experiments. The results served to show the validity and
applicability of the developed contributions.