Method and apparatus for measuring remaining charge of galvanic

Details Method and apparatus for measuring remaining charge of galvanic Method and apparatus for measuring remaining charge of galvanic

1985-02-07

1987-08-18

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Electrolyte properties

Using a battery testing device

324425, 320 48, 340636, G01N 2746, H02J 704, G08B 2100

Patent

active

046879960

ABSTRACT:
A method and apparatus for measuring the remaining charge of a galvanic cell effects the measurement of the remaining charge by superimposing an AC voltage or current on DC voltage or current issuing from the cell to produce a higher harmonic current or voltage, determining the value corresponding to a higher harmonic component of n'th order from the higher harmonic current or voltage, and comparing the value thus measured of the cell under test with that measured previously in the same manner of a reference galvanic cell. Since the corresponding value of the higher harmonic current or voltage of n'th order varies notably with the decrease in the remaining charge of the galvanic cell, the comparison of the found corresponding value with the reference characteristic is effected with ease and the measurement can be carried out accurately and simply.

REFERENCES:
patent: 3808487 (1974-04-01), Feuillade
patent: 3984762 (1976-10-01), Dowgiallo, Jr.
patent: 4498044 (1985-02-01), Horn
E. Willihnganz; "Battery Impedance"; Sep. 1959; Electrical Engineering; pp. 922-925.

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