Grid for use in lead acid batteries and process for producing sa

Details Grid for use in lead acid batteries and process for producing sa Grid for use in lead acid batteries and process for producing sa

1988-12-12

1990-07-03

Walton, Donald L.

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

29 2, H01M 468

Patent

active

049390511

ABSTRACT:
The present invention provides a process for producing a grid for use in lead acid batteries which comprises superposing, on a sheet bar of a lead-calcium alloy, a sheet or a foil of a lead-silver-tin alloy consisting of 0.01-1.0% by weight of tin and a residual quantity of lead and having a thickness smaller than that of the sheet bar, pressure-bonding both the materials by cold rolling to prepare an elementary sheet, and subjecting the elementary sheet to an expanding process or a punching process.
The grid obtained according to the process of the invention is improved in the charge-discovery characteristics after overdischarging and standing and does not deteriorate the maintenance-free characteristic of lead-calcium-tin alloy.

REFERENCES:
patent: 2678340 (1954-05-01), Stoertz
patent: 4035556 (1977-07-01), Duddy et al.
patent: 4092462 (1978-05-01), Giess et al.
patent: 4107407 (1978-08-01), Koch
patent: 4279977 (1981-07-01), Matter
patent: 4443918 (1984-04-01), Morinari et al.
patent: 4805277 (1989-02-01), Yasuda et al.

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