Battery and method for manufacturing the same

Details Battery and method for manufacturing the same Battery and method for manufacturing the same

2003-01-13

2008-03-25

Ryan, Patrick Joseph (Department: 1745)

Chemistry: electrical current producing apparatus, product, and

Plural concentric or single coiled electrode

C429S176000

Reexamination Certificate

active

07348095

ABSTRACT:
After accommodating an electrode group in a battery case having a substantially square transverse cross section, making an opening head of the battery case into a cylindrical shape through compression molding, an annular groove is formed by pressing a groove-forming roller sideways against a side surface of the opening head while rotating the battery case with a pressing force being kept applied to the battery case in an axial direction from the opening portion side, or alternatively pressing the groove-forming roller against the opening head from the side surface thereof and concurrently displacing the groove-forming roller in a direction toward the opening portion of the battery case while rotating the battery case. After having an annular supporting portion that bulges inward of the battery case support an opening-sealing member, the opening-sealing member is fixed through caulking by bending the opening end portion of the battery case inward, whereby a battery is manufactured.

REFERENCES:
patent: 5958620 (1999-09-01), Nagaura
patent: 6168883 (2001-01-01), Urry
patent: 6465122 (2002-10-01), Kitaoka et al.
patent: 6849357 (2005-02-01), Kasahara et al.
patent: 58-112259 (1983-07-01), None
patent: 63-221551 (1988-09-01), None

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