Battery

Details Battery Battery

2004-09-14

2008-10-07

Ryan, Patrick (Department: 1795)

Chemistry: electrical current producing apparatus, product, and

Means externally releasing internal gas pressure from closed...

C429S175000, C429S064000, C429S082000

Reexamination Certificate

active

07432010

ABSTRACT:
A battery, which can inhibit raise of an internal resistance even when temperature change or mechanical shock is applied, and which has superior productivity is provided. A safety mechanism and a battery cover are installed at an open part of a battery case by caulking through a gasket. Inside of the battery case is sealed. A flange part of the battery cover contacts with a flange part of a safety valve of the safety mechanism. A surface roughness of the contact face is set to be in the range from about 0.5 μm to about 5.5 μm based on an arithmetic average roughness Ra. A contact resistance between the battery cover and the safety valve is thereby reduced. Further, a maximum height Ry of the contact face is preferably in the range from about 8.0 μm to about 50.0 μM.

REFERENCES:
patent: 5738952 (1998-04-01), Abe
patent: 357182963 (1982-11-01), None
patent: 63-202847 (1988-08-01), None
patent: 10-012215 (1998-01-01), None
patent: 11-204089 (1999-07-01), None
patent: 2001-126682 (2001-05-01), None
patent: 2001-126695 (2001-05-01), None
patent: 2003-187773 (2003-07-01), None
patent: 2001-126682 (2005-11-01), None

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