A method and a device for charging a battery

Details A method and a device for charging a battery A method and a device for charging a battery

H - Electricity

02

J

H02J 7/04 (2006.01)

Patent

CA 2401560

A device for charging a battery comprises an alternating current source, a rectifier being connected with its input to the alternating current source and being connected with its output to the battery for charging thereof. It also has a member for measuring the charging current from the rectifier to the battery and a means (13) for comparing the measured charging current with a current limit value and an arrangement adapted to control the voltage on the output of the rectifier based on information about said comparison and decrease it if the measured current exceeds the current limit value for reduction of the charging current. A unit (23, 28, 30) is adapted to form the current limit value by comparing a current value formed by the value of said measured charging current with a restriction on its positive rise speed with a predetermined maximum current limit value, and to determine the lowest of the so obtained current value and said maximum current limit value as said current limit value for the comparison of said means (13).

Ce dispositif de chargement de batterie comporte une source de courant alternatif et un redresseur, dont l'entrée est raccordée à la source de courant alternatif, servant à charger la batterie. Il comporte également un élément servant à mesurer le courant de charge transitant du redresseur vers la batterie ainsi que des moyens (13), servant à comparer le courant de charge mesuré à une valeur limite de courant, et un mécanisme conçu pour réguler la tension de la sortie du redresseur d'après cette comparaison ainsi que pour abaisser la tension si le courant mesuré dépasse la valeur limite. Une unité (23, 28, 30) est conçue pour établir la valeur limite de courant par comparaison d'une valeur de courant, établie grâce à la valeur du courant de charge mesuré avec une restriction relative à sa vitesse d'élévation positive, avec une valeur limite de courant maximale prédéterminée. Cette unité détermine également le seuil le plus bas de la valeur de courant ainsi obtenue ainsi que la valeur limite maximale en tant que valeur limite de courant aux fins de la comparaison des moyens susmentionnés (13).

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