State of charge indicator for deep-cycle application

Details State of charge indicator for deep-cycle application State of charge indicator for deep-cycle application

1993-03-12

1995-05-16

Stephan, Steven L.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

320 43, 340636, 324433, G01N 2720

Patent

active

054164028

ABSTRACT:
A state of charge indicator monitors a voltage produced by a depletable energy source and provides an indication when the state of charge of the depletable energy source falls below a predetermined threshold. The state of charge indicator includes an input circuit for sensing the voltage and producing a plurality of tap voltages. The state of charge indicator further includes a monitor circuit for comparing each tap voltage with a corresponding threshold voltage and producing a result for each tap voltage falling below its corresponding threshold. The state of charge indicator still further includes a storage device for storing each result and producing an accumulated status and an output circuit for producing the indication when the accumulated status exceeds an accumulated status threshold.

REFERENCES:
patent: 4560937 (1985-12-01), Finger
patent: 4740754 (1988-04-01), Finger
patent: 4835453 (1989-05-01), Munning Schmidt et al.
patent: 5130699 (1992-07-01), Reher et al.
patent: 5272380 (1993-12-01), Clokie
patent: 5298850 (1994-03-01), Matsui

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