Alkaline battery with flat housing
View Patent ↗A flat elongated alkaline battery comprising an outer metal housing and a single alkaline cell encased within a hydrogen permeable plastic container which is housed within the interior of the metal housing. The outer housing has at least a major surface which is a flat polygon. Preferably the outer metal housing is a cuboid.
1. An alkaline battery comprising only one alkaline cell, said battery comprising an metal elongated housing having a major portion of its surface substantially flat; wherein said alkaline cell is contained within the interior of said metal housing; wherein said cell comprises an anode slab, a cathode slab, and separator therebetween; said anode and cathode stacked in body to body arrangement with said separator therebetween; wherein said cell has a pair of opposing major outer surfaces, at least one of said major outer surfaces being substantially polygonal; wherein one of said opposing major surfaces forms a portion of the anode and the other forms a portion of the cathode; wherein a peripheral edge surface of said cell lies between said pair of opposing major outer surfaces; wherein said cell is encased in a casing; and wherein said cell and said casing are housed within the interior of said metal elongated housing.
2. The alkaline battery of claim 1 wherein said casing is a plastic casing permeable to hydrogen.
3. The alkaline battery of claim 1 wherein the anode comprises zinc and the cathode comprises manganese dioxide.
4. The alkaline battery of claim 1 further comprising a negative terminal at one end of said metal housing in electrical contact with said metal housing and said anode; and a positive terminal at an opposing end of said housing, wherein said positive terminal is insulated from said metal housing and the cathode is in electrical contact with said positive terminal.
5. The alkaline battery of claim 1 wherein the metal housing has a substantially polyhedron shape.
6. The alkaline battery of claim 1 wherein said cell has a substantially polyhedron shape.
7. The alkaline battery of claim 1 wherein the metal housing comprises an elongated body surface and two opposing ends; wherein a major portion of said body surface has a substantially flat polygonal shape.
8. The alkaline battery of claim 1 wherein said pair of opposing major outer surfaces of said cell has a substantially flat polygonal shape.
9. The alkaline battery of claim 1 wherein said pair of opposing major outer surfaces of said cell has a flat rectangular shape.
10. The alkaline battery of claim 1 wherein the metal housing comprises an elongated body surface and two opposing ends; wherein said metal housing has a cuboid shape.
11. The alkaline battery of claim 10 wherein said cell has a cuboid shape.
12. The alkaline battery of claim 11 wherein the anode and cathode of said cell each has a cuboid shape.
13. The alkaline battery of claim 1 wherein the volume of the anode and cathode is between about 50 and 75 percent of the external volume of said metal housing.
14. The alkaline battery of claim 10 wherein the overall dimensions of the battery are 6 mm thickness; 17 mm width; and 67 mm length.
15. The alkaline battery of claim 1 wherein the metal forming said housing is selected from the group consisting of nickel plated cold rolled steel and stainless steel.
16. The alkaline battery of claim 1 wherein said casing is permeable to hydrogen and comprises a plastic selected from the group consisting of porous polyethylene, porous polypropylene, nylon and polysulfone.
17. The alkaline battery of claim 1 wherein said battery is a primary nonrechargeable battery.