Process for producing a grid for use in lead acid batteries

Details Process for producing a grid for use in lead acid batteries Process for producing a grid for use in lead acid batteries

1987-12-21

1989-02-21

Walton, Donald L.

Metal working

Bias cutting of tubular stock

429242, 429245, H01M 474

Patent

active

048052779

ABSTRACT:
The present invention provides a process for producing a grid for use in lead acid batteries which comprises superposing a sheet or a foil of a lead alloy on a sheet bar composed of a lead-calcium alloy, said sheet or foil of lead alloy having a composition different from that of the sheet bar and having a thickness smaller than that of the sheet bar, followed by integrating the two materials by cold rolling process to form an elementary sheet and then subjecting the elementary sheet to an expanding or punching processing.
The grid obtained according to this process is improved in the charging recovery characteristics after standing in a superdischarged state and in the corrosion resistance of grid at high temperatures without deteriorating the maintenance-free characteristics of the lead-calcium alloy itself.

REFERENCES:
patent: 4035556 (1977-07-01), Duddy et al.
patent: 4107407 (1978-08-01), Koch
patent: 4279977 (1981-07-01), Matter
patent: 4443918 (1984-04-01), Morinari et al.

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