Safety plate of secondary battery

Details Safety plate of secondary battery Safety plate of secondary battery

2005-01-04

2005-01-04

Ryan, Patrick (Department: 1745)

Chemistry: electrical current producing apparatus, product, and

Means externally releasing internal gas pressure from closed...

Blowout type

C429S057000, C429S082000

Reexamination Certificate

active

06838206

ABSTRACT:
In a battery in which a separator is disposed between a cathode and an anode, a jelly roll is wound with the separator. The cathode, the anode and the separator are received in a battery case and surrounded with an electrolyte, and an opening of the battery case is sealed by a top cap assembly connected to the cathode. A curved groove is formed on the battery case as a safety element for preventing the explosion of the battery due to an increase of internal pressure, the groove being formed along a line of equal stress on the surface of the battery case.

REFERENCES:
patent: 4175166 (1979-11-01), Rosansky
patent: 4722874 (1988-02-01), Marchak
patent: 5738952 (1998-04-01), Abe
patent: 6159631 (2000-12-01), Thompson et al.
patent: 6180279 (2001-01-01), Kinuta
patent: 6432572 (2002-08-01), Yoshida et al.
patent: 20030077505 (2003-04-01), Goda et al.
patent: 1244294 (2000-02-01), None
patent: 02-284350 (1990-11-01), None
patent: 09-320549 (1997-12-01), None
patent: 11-204093 (1999-07-01), None

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