Process and device for measuring the state of charge of an elect

Details Process and device for measuring the state of charge of an elect Process and device for measuring the state of charge of an elect

1983-03-17

1986-02-25

Wise, Edward J.

Boots, shoes, and leggings

324426, 324433, G01R 1302, G06F 1556

Patent

active

045731268

ABSTRACT:
Process and device for measuring the state of charge of an electrochemical generator such as a lead-acid battery, while operating. The device includes means for measuring the voltage of the generator means for storing the no-load voltage (V=E(to)) of the generator during its initial connection, then the last value of the computed electromotive force (V, V.sub.M), means for computing the value of the difference .DELTA.V between the measured voltage (Vb) of the generator and the last value of the computed electromotive force (V, V.sub.M), means for determining the sign of said difference .DELTA.V, means for measuring the elapsed time (.delta.) between two successive measurements of the voltage of the generator, means for computing the variation of electromotive force .DELTA.E=f(.DELTA.V).multidot..delta. of the generator means for computing the value of the electromotive force from the last computed value and of said variation .DELTA.E, and means for displaying the computed value of the electromotive force.

REFERENCES:
patent: 3898548 (1975-08-01), Perelle et al.
patent: 4017724 (1977-04-01), Finger
patent: 4197582 (1980-04-01), Johnston et al.
patent: 4217645 (1980-08-01), Barry et al.
patent: 4290109 (1981-09-01), Taniguchi et al.
patent: 4333149 (1982-06-01), Taylor et al.
patent: 4377787 (1983-03-01), Kikuoka et al.
patent: 4445090 (1984-04-01), Melocik et al.

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