FLAT BATTERY AND PRODUCTION METHOD THEREOF - MATSUSHITA ELECTRIC IND CO LTD

Title:

FLAT BATTERY AND PRODUCTION METHOD THEREOF

Document Type and Number:

WIPO Patent Application WO/2000/035033

Kind Code:

A1

Abstract:

A flat battery comprising a battery case doubling as one electrode terminal, a sealing plate doubling as the other electrode terminal and consisting of a planar center portion projecting toward an outer face side and planar peripheral edges extending almost in parallel with the center portion, and a gasket insulating the case from the sealing plate and sealing a power generating element, characterized in that the peripheral edges of the sealing plate are bent at further outer peripheral edges, or the case has folding portions to be fitted to the peripheral edges of the sealing plate via the gasket, the folding portions partially compressing the gasket. The flat battery, with such an improved sealing plate and/or improved case shape, is excellent in electrolyte leakage resistance and mass-productivity despite its thin structure.

Inventors:

OKAHISA MITSUGU (JP)
YAMANAKA SUSUMU (JP)
UYAMA TAKAO (JP)
IKEHATA TOSHIHIKO (JP)
TAKEUCHI TETSUYA (JP)

Application Number:

PCT/JP1999/006893

Publication Date:

June 15, 2000

Filing Date:

December 08, 1999

Export Citation:

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Assignee:

MATSUSHITA ELECTRIC IND CO LTD (JP)
OKAHISA MITSUGU (JP)
YAMANAKA SUSUMU (JP)
UYAMA TAKAO (JP)
IKEHATA TOSHIHIKO (JP)
TAKEUCHI TETSUYA (JP)

International Classes:

H01M10/04; H01M50/103; H01M50/184; H01M50/186; (IPC1-7): H01M2/04; H01M2/02; H01M2/08

Foreign References:

JPS58179750U	1983-12-01
JPH0955227A	1997-02-25
JPS62137557U	1987-08-29
JPS5874764U	1983-05-20
JPS57173266U	1982-11-01
JPH08339785A	1996-12-24
JPS54137731U	1979-09-25
JPS5568269A	1980-05-22
JPS5618364A	1981-02-21
JPH0513059A	1993-01-22
JPH05198292A	1993-08-06

Other References: