G - Physics – 01 – R
Patent
G - Physics
01
R
G01R 31/36 (2006.01) B60L 11/18 (2006.01) H02J 7/00 (2006.01) H02J 7/10 (2006.01)
Patent
CA 2121471
A monitoring circuit is provided to monitor batteries white they are being charged or discharged, where the batteries comprise a series of modules or cells that are connected in series. A terminal is placed between each adjacent pair of modules and at each end of the battery, so that voltage across each module may be measured at the pair of terminals that define the module. Several different determinations of module voltage may be made during charge and/or discharge of the battery including the resistance free voltage of the module, and the module voltage while current is flowing through the battery. Generally, same or all of the modules are tested periodically, where the interruption interval for internal resistance free voltage determination may be in the order of 2 to 3 ms, and the testing frequency for the battery may be in the order of 0.5 to 25 Hz. Alarms may be triggered in the event of module voltages being sensed that are outside of predetermined limits, meaning that the charging and/or discharging characteristics of any of the modules have changed and are significantly different than those of the other modules. By such alarm indications, the module may be changed before serious damage occurs to the battery, either by overcharging or severely discharging the battery.
On décrit un système de contrôle pendant la charge et la décharge de batteries qui comprennent une série de modules ou cellules connectés en série. On dispose une borne entre chaque paire adjacente de modules et à chaque extrémité de la batterie de manière qu'on puisse mesurer la tension qui traverse chaque module à la paire de bornes qui le concerne. Pendant la charge et/ou la décharge de la batterie, on peut procédér à différentes mesures concernant la tension du module, y compris sa tension sans résistance ou celle existant alors que le courant passe dans la batterie. En général, on teste périodiquement une partie ou la totalité des modules, avec un intervalle d'interruption concernant la mesure de tension sans résistance interne d'environ 2 à 3 ms et une fréquence de test de batterie d'environ 0,5 à 25 Hz. Si les tensions de modules sortent des limites programmées, des alarmes peuvent se déclencher car les caractéristiques de charge et/ou de décharge de l'un des modules ont évolué de façon à différer significativement de celles des autres modules. Ces alarmes permettent de charger ledit module avant que des dégât sérieux ne se produisent dans la batterie par surcharge ou décharge grave.
Ecotality Inc.
Ridout & Maybee Llp
LandOfFree
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