Measurement of Battery Separator Resistances in Low Impedance Conductivity Cells by A. C. Bridge Techniques.

摘要

Measurement of the resistance of battery separator membranes is frequently accomplished by taking the difference between the resistances of an electrolyte filled conductivity cell with and without the separator inserted between the electrodes. For low resistance separators this may involve measurements of impedances of a few tenths of an ohm. It is shown via equivalent circuit analysis and experimental data on a low impedance cell filled with 45% aqueous KOH solution that ac bridge measurements of separator resistances can be seriously in error if proper account is not taken of electrode impedance. (Author)