Special features of discharge characteristics of different types of lithium-thionyl chloride cells and the problem of their diagnostics

The problem of using discharge and noise characteristics of primary cells with the lithium-thionyl chloride system is examined in order to monitor the state of these power sources (primarily their depth of discharge). An analysis of special features of the discharge curves for lithium-thionyl chloride cells of the bobbin and jellyroll type, as well as the intensity of voltage fluctuations and power spectra of the electrochemical noises of these cells, leads to the conclusion that it is possible in principle to perform diagnostics on them, primarily to identify power sources that are significantly discharged (more than 70–80%).