Method and device for detecting a state of charge of a...

Details Method and device for detecting a state of charge of a... Method and device for detecting a state of charge of a...

G - Physics

01

R

G01R 31/36 (2006.01) H02J 7/00 (2006.01) B60K 6/04 (2006.01)

Patent

CA 2249951

Variation of the charged amount among battery blocks composing a battery assembly is detected. By subtracting the detected value of the variation from the width between the upper limit value and the lower limit value of the charged amount, the movable range of the charged amount is found. The position of the present charged amount is detected as the state of charge. For example, it is arranged that both ends of the movable range are 0% and 100%, and that the movable range is the full scale. Then, the position of the charged amount on this scale is specified by the ratio %. The detection of the state of charge in which the variation in charged amount and the change of the movable range are considered, is performed, and on the basis of this state of charge, a preferable charge and discharge control is performed.

La présente invention a pour objet un dispositif permettant de détecter les variations au niveau de l'état de charge de blocs de batteries d'accumulateurs. Par soustraction de la valeur de la variation dans la largeur séparant la limite supérieure et la limite inférieure du niveau de charge, la plage de variation de valeur de charge peut être déterminée. La position correspondant à une charge ponctuelle est représentée comme l'état de charge actuel. Par exemple, les deux extrêmes d'une plage mobile sont 0 % et 100 %, la plage mobile occupant l'échelle de mesure complète. La position correspondant au niveau de charge ponctuel est ensuite spécifiée en fonction d'un ratio de 0 %. La détection de l'état de charge dans lequel les variations de charge et de plage mobile sont prises en compte, est effectuée et, sur la base de cet état de charge, un niveau de régulation de charge et de décharge préféré est établi.

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