Device for detecting residual capacity of battery

Details Device for detecting residual capacity of battery Device for detecting residual capacity of battery

1988-03-15

1989-07-18

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Electrolyte properties

Using a battery testing device

324426, 324430, G01N 2746

Patent

active

048497002

ABSTRACT:
A device for detecting the residual capacity of a battery comprises a battery current measuring circuit for measuring battery current, a battery voltage measuring circuit for measuring battery voltage, a converting circuit for converting the measured current into a voltage value, based on the internal impedance of the battery, and a comparator circuit for comparing the conversion voltage value with the measured voltage. When the measured voltage is smaller than the conversion voltage value, the comparator circuit operates a battery residual-capacity detect signal indicating that the residual capacity of the battery is small.

REFERENCES:
patent: 4193025 (1980-03-01), Frailing et al.
patent: 4678998 (1987-07-01), Muramatsu

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