Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Electrode
Patent
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.
Furuya Sadao
Hoshihara Naoto
Ishii Teruaki
Takahashi Katsuhiro
Yamaguchi Takashi
Matsushita Electric - Industrial Co., Ltd.
Walton Donald L.
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