Study of discharge process final voltage influence on parameters of generalized Peukert's equation for nickel-cadmium batteries

Abstract

In this paper, the Peukert's generalized equation C=Cm /(1+(i/i0)n) is proposed to describe the dependence between a battery's capacity and discharge current for nickel-cadmium batteries. It was proved by experiments that this equation is good for the description of batteries' capacity at any discharge currents unlike the classical Peukert's equation, which is inapplicable at small discharge currents. Further, all the parameters of this equation have a clear electrochemical sense. The dependence of the parameters of the Peukert's generalized equation was studied both: batteries' nominal capacity and their discharge process' final voltage. It was proved that the parameter n does not depend on a batteries nominal capacity but instead does depend on a final discharge voltage. The empiric dependences of the parameters Cm and i0 were found on batteries' nominal capacity and final discharge voltage.