Device for indicating the charge status of a battery

Details Device for indicating the charge status of a battery Device for indicating the charge status of a battery

G - Physics

01

R

320/12, 320/4

G01R 31/36 (2006.01) B26B 19/28 (2006.01) H02J 7/00 (2006.01) H02J 7/10 (2006.01)

Patent

CA 1262934

PHN 11 762 ABSTRACT: Device for indicating the charge status of a battery. For determining the charge status of a battery (4) when it is discharged by a load (XL) and/or when it is charged by a power-supply circuit (1) a value representing the nominal charging time and discharging time respectively and stored in first (10) and second adjusting means (11) respectively is applied to computing means (12). On the basis of clock pulses applied to the computing means (12) by the clock means (13) the computing means calculate the charge status of the battery by expressing the elapsed discharging or charging time as a faction of the adjusted discharging time and charging time respectively, which computed charge status is indicated by indicator means (14). During discharging and charging an actual charge status is detected by first (7) and second (6) detection means. In the case of a difference between the computed and the actual charge status correction means (15) correct the computed charge status and the value stored in the adjusting means (10, 11) is updated, so that during a subsequent discharging a charging cycle the computed charge status is better in conformity with the actual charge status. Fig. 2.

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