Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Cell enclosure structure – e.g. – housing – casing – container,...
Reexamination Certificate
2011-08-09
2011-08-09
Yuan, Dah-Wei D (Department: 1727)
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Cell enclosure structure, e.g., housing, casing, container,...
C429S163000, C429S164000, C429S174000, C429S175000, C429S176000, C429S177000
Reexamination Certificate
active
07993778
ABSTRACT:
A lithium ion secondary battery having a safety vent responsive to temperature and pressure. The lithium ion secondary battery includes an electrode assembly having a positive electrode plate, a separator, and a negative electrode plate which are simultaneously wound and laminated, and positive and negative electrode leads extending outward from the positive and negative electrode plates, respectively. A can containing the electrode assembly and having an opening; and a cap plate coupled to the opening of the can, wherein an electrode terminal extends through and is coupled to the center of the cap plate with a gasket interposed therein, the negative electrode lead being connected to the electrode terminal, the positive electrode lead being connected to the cap plate, a coupling hole being formed on the cap plate, and a safety vent adapted to soften at a predetermined temperature is coupled to the coupling hole.
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Maeng Soo-Yeon
Yim Hoon
Christie Parker & Hale LLP
Han Kwang
Samsung SDI & Co., Ltd.
Yuan Dah-Wei D
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