Emploi de mesures d´impedance four la modelisation des accumulateurs nickel - CADMIUM

Impedance measurements are performed on nickel??-cadmium cells over a wide frequency range (10^-3 to 10⁴ Hz). The diagrams are obtained using a galvanostatic mode for a quasi equilibrium state with a zero constant current intensity and a super?? imposed alternative current of small amplitude. The results are presented for a battery charged and discharged under standardized conditions. An equivalent electric circuit that best fits the experimental results is proposed.