Method of estimating residual capacity of battery

Details Method of estimating residual capacity of battery Method of estimating residual capacity of battery

1996-02-05

1997-06-03

Wieder, Kenneth A.

Electricity: measuring and testing

Electrolyte properties

Using a battery testing device

324429, 324430, 320 48, 320 43, 340636, G01N 2746

Patent

active

056358423

ABSTRACT:
In estimating the residual capacity of a battery according to the maximum output estimating process, a reference point is established in advance at the intersection of a plurality of current/voltage characteristic linear curves corresponding to various residual capacities of the battery or in an area in the vicinity of the intersections of the curves. A current/voltage characteristic linear curve is determined so as to pass through the reference point and a measured operating point of the battery which corresponds to the present discharging current and output voltage values measured when the battery is discharged. Then, a maximum transfer power value of the battery is determined from the current/voltage characteristic linear curve thus determined, and the present residual capacity of the battery is estimated from the maximum transfer power value.

REFERENCES:
patent: 3680072 (1972-07-01), Charbonnier
patent: 3808522 (1974-04-01), Sharaf
patent: 4423378 (1983-12-01), Marino
patent: 4678998 (1987-07-01), Muramatsu
patent: 4849700 (1989-07-01), Morioka
patent: 5140269 (1992-08-01), Champlin
patent: 5281919 (1994-01-01), Palanisamy
patent: 5325041 (1994-06-01), Briggs

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