Method of making battery plates for lead acid storage batteries

Details Method of making battery plates for lead acid storage batteries Method of making battery plates for lead acid storage batteries

1993-04-05

1995-03-28

Willis, Jr., Prince

Metal working

Bias cutting of tubular stock

429242, 429249, H01M 482

Patent

active

054012783

ABSTRACT:
A battery plate for lead acid storage batteries using a grid prepared by expanding a lead-calcium-tin (Pb--Ca--Sn) alloy sheet, is made by expanding a Pb--Ca--Sn alloy sheet having a tensile strength of 6.0 kg/mm.sup.2 or lower and an Sn content of 0.6-1.8% by weight to make a grid,filling this grid with an active material paste, and then aging the grid to increase the tensile strength of the expanded grid to 7.0 kg/mm.sup.2 or higher. The workability in expanding of the Pb--Ca--Sn alloy sheet can be improved and furthermore, concentration of stress strain on the nodes of the grid can be inhibited and thus, corrosion of the nodes can be inhibited. The aging can provide a battery pate having a high tensile strength and a lead acid storage battery having an excellent charge-discharge cycle life characteristics.

REFERENCES:
patent: 3881952 (1975-05-01), Wheadon et al.
patent: 4279977 (1981-07-01), Matter
patent: 4906540 (1990-03-01), Hoshihara et al.
Lead Acid Batteries, Hans Bode, pp. 219-221, 1977.

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