Enclosed-type secondary cell

Details Enclosed-type secondary cell Enclosed-type secondary cell

1996-05-07

1998-04-14

Kalafut, Stephen

Chemistry: electrical current producing apparatus, product, and

Means externally releasing internal gas pressure from closed...

Blowout type

429 7, 429 62, 429174, H01M 212

Patent

active

057389527

ABSTRACT:
An enclosed-type secondary cell comprises a safety valve (5) made of a metal plate which is deformed with an increase of an internal pressure of the secondary cell, a current interrupting means (6) energized when said safety valve (5) is deformed, an annular gasket (15) for holding an outer peripheral flange portion of the safety valve (5), and a disk (17) serving as a support for detaching a welded portion of a lead plate (17) and a safety valve convex portion (9) when the safety valve (5) is deformed. The annular gasket (15) includes a stepped portion (15e) within a bead-treatment area (21), and the disk (17) is fixed at its outer peripheral portion to the stepped portion (15e) of the annular gasket (15). This enclosed-type secondary cell has the current interrupting means which is energized when the safety valve (4) is deformed with an increase of the internal pressure within the enclosed-type secondary cell. Accordingly, the vacant space of the enclosed-type secondary cell is effectively utilized, and without decreasing a secondary cell capacity, the enclosed-type secondary cell is very strong against shock caused when it is dropped.

REFERENCES:
patent: 3279953 (1966-10-01), Bierdumpfel
patent: 4207385 (1980-06-01), Hayama
patent: 4943497 (1990-07-01), Oishi et al.
patent: 4971867 (1990-11-01), Watanabe et al.
patent: 5418082 (1995-05-01), Taki et al.
patent: 5427875 (1995-06-01), Yamamoto et al.
patent: 5464705 (1995-11-01), Wainwright
Patent abstracts of Japan vol. 18, No. 527 (E-1613) and JP-A-06 187957 (Toshiba Battery Co. Ltd.).

Affiliated with

Also associated with

Rating

Enclosed-type secondary cell does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Enclosed-type secondary cell, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Enclosed-type secondary cell will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-633360