Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1980-07-17
1982-02-16
Caldwell, Jr., John W.
Communications: electrical
Condition responsive indicating system
Specific condition
320 48, 324433, 324434, 328148, 340661, 307362, G08B 2100, H03K 5153
Patent
active
043161855
ABSTRACT:
A battery monitor circuit for rechargeable multicell batteries that provides a reliable indication of battery failure independent of temperature, load and age, by continuously comparing the impedance of the cells of the battery against each other. Comparison means are provided responsive to a first voltage at a tapped terminal of the battery that divides the battery cells into two groups, and to a second voltage that represents a fraction of the battery voltage corresponding to the ratio of the number of cells in each group, said comparison means generating an error signal when said first and second voltages change so as to experience a reversal in relative magnitude, which is indicative of cell deterioration.
REFERENCES:
patent: 3808534 (1974-04-01), Summers et al.
patent: 4134060 (1979-01-01), Feldman
Watrous Donald L.
Weischedel Richard C.
Caldwell, Jr. John W.
Davis James C.
General Electric Company
Gerasimow Alexander M.
Myer Daniel
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