H - Electricity – 01 – M
Patent
H - Electricity
01
M
H01M 2/04 (2006.01)
Patent
CA 2738303
Disclosed herein is a cap assembly loaded on an open upper end of a cylindrical container of a battery in which an electrode assembly is mounted in the cylindrical container, the cap assembly including a safety vent having a predetermined notch configured to rupture by high-pressure gas generated in the battery, a current interruptive device coupled to a bottom of the safety vent by welding for interrupting current when internal pressure of the battery increases, and a current interruptive device gasket for surrounding an outer circumference of the current interruptive device, wherein the current interruptive device includes two or more through holes for gas discharge, the through holes being formed such that the sum of areas of the through holes is equal to 20 % to 50 % of an entire area of the current interruptive device. When high-pressure gas is generated in the battery, the cap assembly effectively interrupts current and rapidly discharges the gas, thereby greatly improving safety of the battery.
L'invention concerne un ensemble capuchon monté sur la partie supérieure ouverte d'un boîtier dans une batterie présentant une structure dans laquelle un ensemble d'électrodes est intégré dans un boîtier cylindrique. Cet ensemble capuchon comprend : un évent de sûreté comportant un cran destiné à être déconnecté par un gaz haute pression provenant de la batterie ; un élément de blocage de courant soudé à l'extrémité inférieure de l'évent de sûreté et bloquant le courant lorsque la pression interne de la batterie augmente ; et un joint statique pour l'élément de blocage de courant, qui entoure la surface périphérique externe dudit élément. L'élément de blocage de courant comporte au moins deux trous traversants pour l'évacuation du gaz. La surface totale des trous traversants est de 20% à 50%, selon la surface totale de l'élément de blocage de courant.
Jung Byung Kyu
Kim Sooryoung
Kim Sungjong
Ku Chahun
Gowling Lafleur Henderson Llp
Lg Chem Ltd.
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