Current collector for lead acid battery
OwnerXiaogang Wanginventor
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Abstract
A low cost, high specific energy and long cycle life lead acid battery includes polymer/metal current collectors. For intermediate electrodes, a current collector includes two polymer grids and a metal foil that is disposed between two grids, and for terminal electrodes, a current collector includes a polymer grid, a polymer sheet and a metal foil that is disposed between the polymer grid and sheet. The surfaces of the grids and metal foil are coated by different conductive and corrosion-resistant composites. The current collectors can be configured as monopolar or bipolar electrodes.
Claims23
A current collector for an electrode plate of a lead acid battery comprising:
- a plurality of polymer members, at least one of said polymer members having a plurality of apertures extending therethrough;
- and
- a separate metal foil member coated by at least one layer of conductive and electrolyte-corrosion-resistant composite and having a thickness in a range of about 10 micrometers to about 200 micrometers disposed between said polymer members and covering one end of said apertures for preventing an electrolyte of the battery from passing through said apertures from one of said polymer members to another one of said polymer members.
A current collector for an electrode plate of a lead acid battery comprising:
- a plurality of polymer members having a plurality of apertures extending therethrough, said polymer members being one of a polycarbonate, acrylonitrile butadiene styrene, polyethylene, and polyvinyl chloride, said polymer members having surfaces coated by a conductive and electrolyte-corrosion-resistant composite;
- and
- a separate metal foil member disposed between said polymer members, said metal foil member is one of aluminum and its alloys, copper and its alloys, nickel and its alloys, titanium and its alloys, and iron and its alloys, said metal foil member having surfaces coated by a conductive and electrolyte-corrosion-resistant composite, said metal foil member covers one end of said apertures for preventing an electrolyte of the battery from passing through said apertures from one of said polymer members to another one of said polymer members.
Dependencies are inferred from the claim text.