Approximate determination of characteristics of discharging electrochemical Ni-Cd system

Abstract

In this publication we were talking about problems of approximate determination of characteristics in functions depending on voltage, energy and conductivity of discharging, using interpolar and approximation math methods, on concrete examples nonhermetics cells and batteries on room temperature. It was shown how it is under data's of experimental measurements of voltage, electric current and time, discharging gives estimated values of characteristics into process mention systems, by using second Njutn or Lagrange's interpolar polynomial and math model which is looking like corresponding polynomial which is calculate by approximation of smallest quadrates. Also is shown how and in which relation electric current of discharging, effects on a value remainder capacity indicated electrochemical system in constant temperature. Derived results for mentioned characteristics are satisfactory for practice and further examinations, which is goal of this publication. .

U radu je obrađena problematika približnog određivanja karakteristika funkcija napona, energije i kapaciteta pražnjenja primenom interpolacionih i aproksimacionih matematičkih metoda, na konkretnim primerima nehermetičke ćelije i akumulatora na sobnoj temperaturi. Pokazano je kako se na osnovu podataka eksperimentalnih merenja napona, struja i vremena pražnjenja dobijaju približne vrednosti karakteristika procesa pražnjenja navedenih sistema primenom drugog Njutnovog ili Lagranžeovog interpolacionog polinoma i matematičkog modela u vidu polinoma odgovarajućeg stepena dobijenog aproksimacionom metodom najmanjih kvadrata. Takođe je pokazano kako i u kojoj meri struja pražnjenja utiče na vrednost odatog raspoloživog kapaciteta navedenog elektrohemijskog sistema pri nepromenljivoj temperaturi. Dobijeni rezultati za navedene karakteristike su zadovoljavajući za praksu i dalja istraživanja, što jeste cilj ovog rada.