Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Electrode
Patent
1991-03-27
1993-11-30
Bell, Mark L.
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Electrode
429241, 429242, 296235, 419 2, H01M 414, H01M 422
Patent
active
052664236
ABSTRACT:
Lead-acid battery plates are made by preparing alloys of lead with at least one additive metal that can be leached with an acid or an alkali from the alloy leaving a porous permeable lead matrix. The additive metal must be evenly and finely dispersed in the lead. A number of additive metals can be used but the additive metal is preferably magnesium or zinc and magnesium, each in a preferred amount in the range of about 3 to 15% by weight. The lead alloy is prepared by casting, preferably by rapid solidification casting, and subsequently pulverizing the alloy. The resulting lead alloy particles are applied to a conventional lead alloy battery grid by pressing, causing the formation of a coherent plate of grid and alloy. The plate is subsequently leached in an alkali or an acid which causes the substantial removal of additive metal from the alloy leaving a coherent porous permeable layer of substantially lead as active material. The preferred leachant is sulfuric acid. Other leachants require careful removal of all traces from the lead matrix. The plates are used for both the positive and the negative plates. The negative plates are treated with an expander, preferably by vacuum impregnation. The positive and negative plates are assembled into a battery which is filled with electrolyte and charged. The fabrication time is reduced from 5 to 7 days for prior art batteries to about 1 to 2 days.
REFERENCES:
patent: 3418113 (1968-12-01), Rao
patent: 3607406 (1971-09-01), Marincic
patent: 3969141 (1976-07-01), Eriksson
patent: 4061843 (1977-12-01), Foulkes
patent: 4143216 (1979-03-01), Hradcovsky et al.
patent: 4262069 (1981-04-01), Devitt et al.
patent: 4315829 (1982-02-01), Duddy et al.
patent: 4324848 (1982-04-01), Will
patent: 4707911 (1987-11-01), Kober et al.
Bell Mark L.
Bonner C. M.
Cominco Ltd.
Fors Arne I.
LandOfFree
Method for preparing lead-acid battery plates does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for preparing lead-acid battery plates, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for preparing lead-acid battery plates will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2094594