Method and apparatus for regulating charging of...

H - Electricity – 01 – M

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H01M 2/12 (2006.01) H01M 2/08 (2006.01) H01M 2/34 (2006.01) H01M 10/34 (2006.01) H01M 10/44 (2006.01)

Patent

CA 2503505

A rechargeable electrochemical cell is provided having a pressure-responsive apparatus for determining a charge termination point. In particular, a reversible pressure-responsive switch may be disposed in a cap at the open end of a rechargeable metal hydride cell. The reversible pressure-responsive switch may also contain a vent system for releasing the cell internal pressure. Additionally, a rechargeable cell is used combination with a charging source that can supply constant voltage, constant current, alternating current, or voltage that varies between a minimum threshold and a maximum threshold. Components of the switch are preferably made of a material that facilitates predictable switch activity.

L'invention concerne une cellule électrochimique rechargeable dotée d'un appareil sensible à la pression conçu pour déterminer un point d'arrêt de charge. Un interrupteur réversible sensible à la pression peut être prévu dans un bouchon situé au niveau de l'extrémité ouverte d'une cellule à hydrures métalliques rechargeable. L'interrupteur réversible sensible à la pression peut également contenir un système d'évent conçu pour évacuer la pression interne de la cellule. Par ailleurs, une cellule rechargeable est utilisée combinée à une source de charge pouvant fournir une tension constante, un courant constant, un courant alternatif ou une tension qui varie entre un seuil minimum et un seuil maximum. Les composants de l'interrupteur sont fabriqués de préférence dans un matériau facilitant l'activité d'interruption prédictive.

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