Lithium ion secondary battery having shape memory safety vent

Details Lithium ion secondary battery having shape memory safety vent Lithium ion secondary battery having shape memory safety vent

2005-09-02

2011-12-27

Dove, Tracy (Department: 1726)

Chemistry: electrical current producing apparatus, product, and

Means externally releasing internal gas pressure from closed...

C429S054000, C429S057000, C429S062000

Reexamination Certificate

active

08084152

ABSTRACT:
A lithium ion secondary battery has a shape memory safety vent adapted to discharge internal compressed gas by temporarily being opened when the temperature reaches a predetermined level to avoid a swelling phenomenon of the battery and improve safety. The lithium ion secondary battery includes an electrode assembly having first and second electrode plates wound a number of times with a separator interposed between them; a can having an opening formed on a side thereof to contain the electrode assembly; and a cap plate adapted to cover the can and provided with a vent hole on a side thereof, to which a safety vent adapted to deform at a predetermined temperature and discharge gas from inside the can to the exterior is coupled.

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Chinese Office action dated Dec. 1, 2006, for CN 200510102414.6.
English translation of Chinese Office action dated Dec. 1, 2006.

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