A method for voltage noise measurement and ıts application to primary batteries

Abstract

Though proven effective in localized corrosion studies, electrochemical noise measurements in batteries with Lithium based chemistries suffer from lack of well–defined measurement and analysis methods. The high capacitance electrodes made out of highly porous materials requires noise measurements to be extremely precise since the small charge due to stochastic events leading to electrochemical noise leads to very small voltage changes due to the large capacitance. Typically, the required precision is achieved by high gain after the offset is corrected. In this article, we are introducing a new offset correction scheme that mitigates the negative effects of electronic offset reduction methods. Using this new offset correction scheme we report the measurement of the otherwise elusive voltage noise of primary Li batteries.