Method and apparatus for charging batteries utilizing...

H - Electricity – 02 – J

Patent

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H02J 7/10 (2006.01) H02J 7/00 (2006.01)

Patent

CA 2285353

A method and apparatus utilizing a new parameter for assessing battery charge acceptance for controlling the charging process of the battery. The charge acceptance parameter comprises a terminal voltage profile which is determined during a variation in a diagnostic current. The slope of the terminal voltage profile is used in the charging process to assess the charge acceptance ability of the battery and thereby control the charging current. For a first group of batteries including lead-acid and nickel-cadmium batteries, the terminal voltage profile is characterised by an increasing profile slope as the charge acceptance ability of the battery is reached. For a second group of batteries comprising nickel-metal hydride batteries, the terminal voltage profile is characterized by a profile slope which approaches zero as the charge acceptance ability of the battery is reached.

L'invention concerne un procédé et un appareil utilisant un nouveau paramètre pour évaluer la capacité de charge d'une batterie afin de réguler le procédé de charge de la batterie. Le paramètre de capacité de charge comprend un profil de tension aux bornes qui est défini au cours d'une variation dans un courant de diagnostic. La pente du profil de tension aux bornes est utilisée lors du procédé de charge pour évaluer la capacité de charge d'une batterie de réguler le courant de charge. Pour un premier groupe de batteries comprenant des batteries au plomb et au cadmium-nickel, le profil de tension aux bornes est caractérisé par une pente de profil croissante lorsque la capacité de charge de la batterie est atteinte. Pour un second groupe de batteries comprenant des batteries au nickel-hydrure métallique, le profil de tension aux bornes est caractérisé par une pente de profil proche de zéro lorsque la capacité de charge de la batterie est atteinte.

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