Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1974-12-20
1976-07-27
Rolinec, R. V.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
320 48, G01N 2742
Patent
active
039719804
ABSTRACT:
Apparatus for indicating the charge condition of a secondary cell, comprising an integrating device which progressively sums the ampere-hours drawn from the cell, and a computer which is programmed to provide a voltage output whose magnitude indicates the total number of ampere-hours available, from the battery at the particular discharge current and temperature. A comparator subtracts from this a voltage derived in accordance with the output of the integrating device. The comparator output thus indicates the remaining ampere-hours available to be drawn from the cell at the prevailing conditions of discharge current and temperature. There may be provided a further computer which is programmed in accordance with the variation in minimum ampere-hour requirement of the cell to ensure that a particular load, e.g. a starting motor, can be successfully operated at various temperatures. This comparator can be arranged so as to provide an indication as to whether or not the charge condition of the cell is sufficient to operate this load.
REFERENCES:
patent: 3778702 (1973-12-01), Finger
patent: 3781658 (1973-12-01), Godshalk
Jungfer Leopold
Kautschitsch Dieter
Weber Richard
Firma Akkumulatorenfabrik Dr. Leopold Jungfer
Marmorek Ernest F.
Rolinec R. V.
Tokar Michael J.
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