Method of estimating residual capacity of battery

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

1997-03-06

1998-10-27

Karlsen, Ernest F.

Electricity: measuring and testing

Electrolyte properties

Using a battery testing device

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

Patent

active

058282181

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.

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patent: 5325041 (1994-06-01), Briggs
patent: 5635842 (1997-06-01), Yokoo

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