Lead acid battery with titanium core grids and carbon based grids
First Claim
1. A hybrid lead acid supercapacitor battery energy storage device comprising:
- a plurality of titanium core positive electrodes, a plurality of negative carbon electrode assemblies, a plurality of separators, a casing, and an acid electrolyte comprising an aqueous solution of sulfuric acid;
wherein;
(a) each of the titanium cores has an expanded metal body portion;
(b) each of the titanium cores is a titanium alloy containing from 0.01 to 0.9% of a platinum group metal;
(c) said titanium cores each having a hot dip coating selected from the groups of lead and lead alloy;
(d) said each carbon electrode assembly comprises a negative current collector comprising a sheet of metal;
(e) two sheets of electronically conductive corrosion resistive shield material sealing said sheet of metal between them; and
(g) a sheet of activated carbon and a binder adhered to and in electrical contact with a surface of said shield material.
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Abstract
A hybrid lead acid electric storage battery uses conventional lead-acid secondary battery chemistry. The battery is a sealed battery or an unsealed battery. The battery has a set of positive battery grids (plates) having cores of thin titanium expanded metal with a thickness, if flattened, preferably in the range 0.2 mm to 0.7 mm and most preferably 0.3 mm to 0.4 mm. The grid cores are of a titanium alloy containing a platinum group metal. The cores are coated with hot dip lead and are not lead electroplated.
The negative plates are carbon based assemblies. Each such assembly has a metal core, preferably a sheet of expanded copper, a corrosion shield sealing the metal core, and an outer layer primarily of activated carbon covering the shield.
36 Citations
16 Claims
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1. A hybrid lead acid supercapacitor battery energy storage device comprising:
- a plurality of titanium core positive electrodes, a plurality of negative carbon electrode assemblies, a plurality of separators, a casing, and an acid electrolyte comprising an aqueous solution of sulfuric acid;
wherein;(a) each of the titanium cores has an expanded metal body portion;
(b) each of the titanium cores is a titanium alloy containing from 0.01 to 0.9% of a platinum group metal;
(c) said titanium cores each having a hot dip coating selected from the groups of lead and lead alloy;
(d) said each carbon electrode assembly comprises a negative current collector comprising a sheet of metal;
(e) two sheets of electronically conductive corrosion resistive shield material sealing said sheet of metal between them; and
(g) a sheet of activated carbon and a binder adhered to and in electrical contact with a surface of said shield material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- a plurality of titanium core positive electrodes, a plurality of negative carbon electrode assemblies, a plurality of separators, a casing, and an acid electrolyte comprising an aqueous solution of sulfuric acid;
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9. A hybrid lead acid supercapacitor battery energy storage device comprising:
- a plurality of titanium core positive electrodes, a plurality of negative carbon electrode assemblies, a plurality separators, a casing, and an acid electrolyte comprising an aqueous solution of sulfuric acid;
wherein;
(a) each of the titanium cores has an expanded metal body portion;
(b) each of the titanium cores is a titanium alloy containing from 0.01 to 0.9% of a platinum group metal;
(c) said titanium cores each having a lead coating which is a hot melt coating and not an electroplated coating; and
wherein (d) said each carbon electrode assembly comprises a negative current collector comprising a sheet of metal;
(e) two sheets of electronically conductive corrosion resistant shield material comprising graphite sealing said sheet of metal between them and having an outer surface; and
(f) a sheet of activated carbon and a binder adhered to and in electrical contact with the outer surface of the shield material. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
- a plurality of titanium core positive electrodes, a plurality of negative carbon electrode assemblies, a plurality separators, a casing, and an acid electrolyte comprising an aqueous solution of sulfuric acid;
Specification