Calcium-tin-silver lead-based alloys, and battery grids and lead

Details Calcium-tin-silver lead-based alloys, and battery grids and lead Calcium-tin-silver lead-based alloys, and battery grids and lead

1992-03-17

1994-03-29

Willis, Jr., Prince

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

429226, 429233, H01M 468

Patent

active

052983501

ABSTRACT:
Automotive SLI lead-acid batteries are disclosed which are characterized by enhanced resistance to positive grid corrosion, even when exposed to the current, relatively high under-the-hood service temperatures in use with recent model automobiles. The grids are formed from either a cast lead-based alloy including from about 0.025 to 0.06% calcium, from about 0.3 to 0.7% tin and from about 0.015 to 0.045% silver, the percentages being based upon the weight of the alloy prior to casting or a wrought lead-based alloy including from about 0.02 to 0.05% calcium, from about 0.3 to 0.5% tin and 0.02 to 0.045% silver, the percentages being based upon the weight of the alloy. Aluminum in an amount of from about 0.008 to about 0.012%, based upon the as-added total weight of the alloy may be used to maintain the desired calcium content during casting.

REFERENCES:
patent: 3287165 (1966-11-01), Jensen
patent: 4125690 (1978-11-01), Bagshaw et al.

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