Chemistry: electrical current producing apparatus – product – and – Sealed cell having gas prevention or elimation means – Prevention or elimination means is one of the cell...
Reexamination Certificate
1999-08-04
2001-09-04
Brouillette, Gabrielle (Department: 1745)
Chemistry: electrical current producing apparatus, product, and
Sealed cell having gas prevention or elimation means
Prevention or elimination means is one of the cell...
C429S060000, C429S129000, C429S246000
Reexamination Certificate
active
06284404
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates generally to a battery and to a gas effluent system therefor, and in particular to a battery, preferably for a vehicle, that has a system allowing for gas generated in the battery to be released outside, and to a gas effluent system for a battery in a vehicle.
A battery in an electric or hybrid vehicle is installed in a battery enclosure, and comprises a cell and a cell enclosure. The cell is comprised of a lamination of a positive sheet electrode, a negative sheet electrode, and a separator between the positive and negative sheet electrodes.
When the battery is operated at higher temperatures than a critical temperature above a normal operating temperature, the cell has a tendency to generate gas therein. Generated gas is released along a gap between the cell and the cell enclosure.
SUMMARY OF THE INVENTION
As the cell has a increased energy density, the gas generating tendency rises, calling for an implementation to effect smooth efflux of generated gas. This invention has been achieved with the point in view.
It therefore is an object of the invention to provide a battery with a system that can effectively release generated gas outside a cell enclosure. It also is an object of the invention to provide a gas effluent system for a battery in a vehicle, that can effect smooth efflux of gas outside a battery enclosure.
To achieve the object, an aspect of the invention provides a battery comprising a cell comprised of lamination of a positive sheet electrode, a negative sheet electrode, and a separator between the positive and negative sheet electrodes, cell enclosure enclosing the cell, and a gas release system for gas generated in the cell to be released outside the cell enclosure, the gas release system comprising a network of blanks formed in the lamination.
Further, to achieve the object, another aspect of the invention provides a gas effluent system for a battery in a vehicle, the battery including a cell comprised of a lamination of a positive sheet electrode, a negative sheet electrode, and a separator between the positive and negative sheet electrodes, and a cell enclosure enclosing the cell, the vehicle having a battery enclosure enclosing the battery, the gas effluent system comprising a gas release system provided inside the battery for generated gas in the cell to be released outside the cell enclosure, the gas release system comprising a network of blanks formed in the lamination, and a gas discharge system for released gas to be discharged outside the battery enclosure.
REFERENCES:
patent: 5741608 (1998-04-01), Kojima et al.
patent: 6037071 (2000-03-01), Poirier et al.
Abe Takaaki
Horie Hideaki
Iwai Ken
Kawai Mikio
Nakagawa Toyoaki
Brouillette Gabrielle
Foley & Lardner
Nissan Motor Co,. Ltd.
Wills Monique
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