Accession Number : ADA149626

Title :   Nickel-Cadmium Battery Cell Reversal from Resistive Network Effects

Descriptive Note : Technical rept.

Corporate Author : AEROSPACE CORP EL SEGUNDO CA CHEMISTRY AND PHYSICS LAB

Personal Author(s) : Zimmerman, A H

PDF Url : ADA149626

Report Date : 17 Dec 1984

Pagination or Media Count : 28

Abstract : During the individual cell short-down procedures often used for storing or reconditioning nickel-cadmium (Ni-Cd) batteries, it is possible for significant reversal of the lowest capacity cells to occur. The reversal is caused by the finite resistance of the common current-carrying leads in the resistive network that is generally used during short-down. A model is developed to evaluate the extent of such a reversal in any specific battery, and the model is verified by means of data from the short-down of a 4-cell, 3.5-A h battery. Computer simulations of short-down on a variety of battery configurations indicate the desirability of controlling capacity imbalances arising from cell configuration and battery management, limiting variability in the short-down resistors, minimizing lead resistances, and optimizing lead configurations. Author's keywords: Battery, Nickel-cadmium, Reversal, Short-circuit, Storage.

Descriptors :   *NICKEL CADMIUM BATTERIES, *SHORT CIRCUITS, CAPACITANCE, CELLS, RESISTANCE, REVERSIBLE

Subject Categories : Electrochemical Energy Storage

Distribution Statement : APPROVED FOR PUBLIC RELEASE