Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – With discharge of cells or batteries
Patent
1989-09-29
1990-08-28
Hickey, R. J.
Electricity: battery or capacitor charging or discharging
Serially connected batteries or cells
With discharge of cells or batteries
324427, G01N 2746, H01M 1048
Patent
active
049528629
ABSTRACT:
A reliable technique of predicting the available reserve time remaining to a selected end voltage of a discharging battery is based on an adaptive state-of-charge algorithm that is active in real time to respond to changing conditions of a battery system. The adaptive state-of-charge algorithm is based on measured discharge characteristics of the battery whose reserve time is to be predicted which have been reduced to two parameters plotted as a single curve with a linear and an exponential region. These discharge characteristics are combined with dynamic parameters of the battery system which are monitored and processed in real time to provide a continuous evaluation and reevaluation of the reserve time remaining under changing conditions. As the discharge proceeds there is a continual improvement in the prediction of reserve time available.
This predictive feature embodying the principles of the invention is included in a stored program controller for a battery plant in a central office in the illustrative embodiment of the invention disclosed herein. In such applications it is highly desirable to be able to predict the available reserve time of a discharging battery until a final end voltage level is reached.
REFERENCES:
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patent: 4433278 (1984-02-01), Lowndes et al.
patent: 4558281 (1985-12-01), Codd et al.
patent: 4595880 (1986-06-01), Patil
patent: 4876513 (1989-10-01), Brilmyer et al.
Biagetti Richard V.
Pesco Anthony M.
AT&T Bell Laboratories
Hickey R. J.
Steinmetz Alford G.
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