Brief description of the measurement of the state of discharge of a battery and a device implementing this process


Ontology type: sgo:Patent     


Patent Info

DATE

1985-06-14T00:00

AUTHORS

RANDIN JEAN-PAUL , ZUELLIG FREDY , LEUENBERGER CLAUDE-ERIC

ABSTRACT

The invention relates to a method for measuring the state of discharge of a stack, defined as being the ratio between the volume supplied by the battery and its nominal capacity,.... < / p & gt; & lt; p & gt; the process according to the invention consists in measuring a first internal impedance z1 of the battery has a first frequency f1 and a second internal impedance z2 of the battery has a second frequency f2, and for determining the argument a12 of the difference z12 of the internal impedances z1, z2, the argument a12 and is sustained representative of the state of discharge of the stack. < / p & gt; & lt; p & gt; this process may advantageously be used for testing of rapid and precise and non destructive the batteries for a portable appliances, for example watches for producing, in order to ensure good state of the stack before it is put in place in the apparatus. More... »

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