Rapid determination of present and potential battery capacity

Details Rapid determination of present and potential battery capacity Rapid determination of present and potential battery capacity

G - Physics

01

R

G01R 31/36 (2006.01)

Patent

CA 2361842

Rapid determination of the condition or charge parameters of a battery, such as the present charge of the battery and the maximum charge capacity of the battery. A plurality of discharge pulses (210) and a plurality of rest periods (220) are applied to the battery. The battery voltage is then measured to provide voltages (225) during the rest periods, and/or voltages (230) during the discharge pulses. The voltage difference among selected one of the voltages are used to provide a difference voltage DELTA-L. The difference voltage DELTA-L is then used to determine a charge parameter of the battery, such as the maximum charge capacity or condition of the battery and the present charge in the battery. This information is then displayed to a user so that the user will know the present capacity and the present charge of the battery and can make an informed decision as to whether the battery is adequate for the project that the user has in mind, or to a subsequent process, such as a charging process.

L'invention concerne la détermination rapide de l'état ou des paramètres de charge d'une batterie, par exemple la charge actuelle de cette batterie ou sa capacité de charge maximale. On applique tout d'abord à cette batterie plusieurs impulsions de décharge (210) et plusieurs périodes de repos (220), puis on mesure la tension de cette batterie afin de produire des tensions (225) au cours des différentes périodes de repos, et/ou des tensions (230) pendant les impulsions de décharge. On utilise ensuite la différence de tension entre certaines de ces tensions appliquées pour obtenir une tension différentielle DELTA-L, à partir de laquelle on détermine un paramètre de charge de ladite batterie, par exemple la capacité de charge maximale, l'état, ou la charge actuelle de celle-ci. Ces données sont par la suite fournies à un utilisateur de sorte que ce dernier peut connaître la capacité et la charge actuelles de la batterie, et donc décider si cette batterie peut lui être utile ou servir ultérieurement à un procédé, par exemple de chargement.

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