Method of making battery plate grids for lead-acid batteries and alloys therefor
AssigneeJoseph Lucas (Batteries) Limited
InventorsStanley Charles Barnes, Robert James Lawrie
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Abstract
Battery plate grids for lead-acid batteries are manufactured from an alloy having the following composition in atomic percentages:- Calcium + Lithium 0.22 - 1.04 Aluminium 0.035 - 0.25 Lead remainder, Wherein the atomic percentage of lithium in the alloy is not less than 0.15 and does not exceeds 0.90 and the atomic percentage of calcium in the alloy is not less than 0.07 and does not exceed 0.49.
Claims7
An alloy for use in the manufacture of battery plate grids for lead-acid batteries, wherein the alloy consists of:
- Calcium + Lithium 0.22 -1.04 Atomic % Aluminium 0.035-0.25 Atomic% and Lead Remainder,
- and wherein the atomic percentage of lithium is not less than 0.15 and does not exceed 0.90, and the atomic percentage of calcium is not less than 0.07 and does not exceed 0.49.
An alloy for use in the manufacture of battery plate grids for lead-acid batteries, wherein the alloy consists of:
- Calcium + Lithium 0.25 -0.65 Atomic % Aluminium 0.035-0.25 Atomic % and Lead Remainder,
- and wherein the atomic percentage of lithium in the alloy is not less than 0.18 and does not exceed 0.58 and the atomic percentage of calcium in the alloy is not less than 0.07.
An alloy for use in the manufacture of battery plate grids for lead-acid batteries wherein the alloy consists of:
- Calcium + Lithium 0.30 -0.50 Atomic %, Aluminium 0.035-0.25 Atomic % and Lead Remainder
- and wherein the atomic percentage of Lithium in the alloy is not less than 0.23 and does not exceed 0.43 and the atomic percentage of Calcium in the alloy is not less than 0.07.
An alloy for use in the manufacture of battery plate grids for lead-acid batteries, wherein the alloy consists of:
- Calcium + Lithium 0.35-0.50 Atomic % Aluminium 0.11 Atomic % and Lead Remainder,
- and wherein the atomic percentage of Lithium in the alloy is not less than 0.28 and does not exceed 0.39 and the atomic percentage of Calcium in the alloy is not less than 0.07.
A method of manufacturing a battery plate grid for a lead-acid battery comprising the steps of producing a molten alloy consisting of:
- Calcium + Lithium 0.22 -1.04 Atomic % Aluminium 0.035-0.25 Atomic % and Lead Remainder
- and wherein the atomic percentage of Lithium is not less than 0.15 and does not exceed 0.90 and the atomic percentage of Calcium is not less than 0.07 and does not exceed 0.49, and then casting the molten alloy into the shape of the grid.
Dependencies are inferred from the claim text.