Battery self-discharge indicator

Details Battery self-discharge indicator Battery self-discharge indicator

H - Electricity

01

M

324/24

H01M 2/00 (2006.01) H01M 10/42 (2006.01)

Patent

CA 1044325

ABSTRACT OF THE DISCLOSURE Electrical leakage between electrodes in an electro- chemical cell is determined by initially overcharging the cell to place it in a fully charged state. Various methods are available to ascertain a full charge, and a convenient method is disclosed in which the full charge is indicated by a pre- determined rate of gassing at the electrodes. After receiving a full charge the cell is stored on open circuit for a time, during which some of the charge is dissipated due to leakage, and is then recharged to achieve an onset of gassing condition. The gas from the cell is conducted to a pressure vessel where it is filtered and slowly exhausted to the atmosphere while the pressure is monitored. An anomalous delay, relative to a refer- ence cell, in achieving the onset of gassing condition indicates cell leakage. The method and apparatus disclosed provides a convenient and considerably faster way than previously known to test for cell leakage.

251571

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