Formation efficiency of positive plates of a lead-acid battery

Details Formation efficiency of positive plates of a lead-acid battery Formation efficiency of positive plates of a lead-acid battery

1986-01-06

1987-04-14

Hearn, Brian E.

Metal working

Bias cutting of tubular stock

429228, 423619, 204 21, H01M 456, B23P 1300

Patent

active

046567062

ABSTRACT:
The formation efficiency of pasted positive plates of a lead-acid battery is greatly enhanced by providing in situ a layer of lead dioxide (PbO.sub.2) on the pasted plate surfaces prior to formation. The PbO.sub.2 layer is preferably formed by treating the surfaces of the plates with an ozone-enriched gas to convert a portion of the poorly conductive positive active precursor material (nPbO.PbSO.sub.4) to electrically conductive PbO.sub.2. In subsequent electrochemical formation of the plates, the total formation charge can be reduced significantly while obtaining more complete conversion of the paste to positive active material. The method also provides an effective substitute for conventional curing of pasted positive plates.

REFERENCES:
patent: 4140589 (1979-02-01), Hradcovsky et al.
patent: 4388210 (1983-06-01), Parker

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