Thin bipolar lead-acid battery with individual cell vent

Details Thin bipolar lead-acid battery with individual cell vent Thin bipolar lead-acid battery with individual cell vent

1989-12-14

1991-04-02

Skapars, Anthony

Chemistry: electrical current producing apparatus, product, and

Having specified venting, feeding or circulation structure

Venting structure

429139, 429185, 429210, H01M 212, H01M 214

Patent

active

050046551

ABSTRACT:
A thin, bipolar, lead-acid battery includes one or more cells, each of which is provided with a one-way vent for allowing release of gas generated during battery formation or overcharge. A planar spacer, having a cut out central portion, receives the electrode and separator components, and has one or more passageways formed therein extending from the wall of the cut out portion to the exterior of one of its edges. The spacer then resembles a frame for the battery components. Film sheets are applied to the opposed surfaces of the spacer and extend outwardly therefrom, at least in the vicinity of the spacer hole. The film is sealed, e.g. by heat, in all exterior areas except adjacent the hole. An oil, such as a silicone oil, is used between the film sheet in the non sealed area to form a one way "duck bill" type vent valve.

REFERENCES:
patent: 3421944 (1969-01-01), Bauer
patent: 3784414 (1974-01-01), Macaulay et al.
patent: 3964932 (1976-06-01), Oltman et al.
patent: 3997365 (1976-12-01), Feldhake
patent: 4275130 (1981-06-01), Rippel et al.
patent: 4659636 (1987-04-01), Suzuki
patent: 4664994 (1987-05-01), Koike et al.

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