Reduced maintenance nicad battery

Details Reduced maintenance nicad battery Reduced maintenance nicad battery

H - Electricity

01

M

319/58

H01M 2/16 (2006.01) H01M 10/30 (2006.01) H01M 10/34 (2006.01)

Patent

CA 2032168

A reduced maintenance nickel-cadmium accumulator with a positive electrode assembly, a negative electrode assembly of which the active mass is consolidated by a polymer and separators consisting of at least one felt of a material selected from the group which consists of polyamide, polypropylene, polyethylene, alone or in a mixture, and without a complementary membrane; the distance between electrodes is of between 0.2 mm and 0.5 mm, the internal pressure is maintained between 0 and 0.7 bars, and said accumulator contains free electrolyte, in order to display, within the temperature range -30 DEG C to +60 DEG C, with a charge of a constant voltage, a charge characteristic which, through a sharp voltage rise, make it possible to detect the end of the charge.

Accumulateur nickel-cadmium à maintenance réduite comprenant un ensemble d'électrodes positives, un ensemble d'électrodes négatives dont la masse active est consolidée par un polymère et des séparateurs constitués par au moins un feutre en un matériau choisi parmi un polyamide, le polypro- pylène, le polyéthylène, seul ou en mélange, sans membrane complémen- taire ; la distance inter-électrodes est comprise entre 0,2 mm et 0,5 mm, la pression interne est maintenue comprise entre 0 et 0,7 bars, et ledit accumulateur contient de l'électrolyte libre, de manière à présenter, dans des limites de températures comprises entre - 30° C et + 60° C, en cas de charge à tension constante, une caractéristique de charge permettant la détection de la fin de la charge grâce à l'existence d'une brutale montée de la tension.

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