Metal-air cathode can having reduced corner and electrochemical cells made therewith
AssigneeRayovac Corporation
InventorJohn David Burns
Life of this patent
Estimating the term…
Abstract
This invention pertains to electrode cans and metal air electrochemical cells made with the electrode cans. The invention provides improvide structure, and methods for making the outer edge of the closed end of the can at the joinder of the closed end of the can with an side wall extinding from the closed end. A substantially flat portion of the outer surface of the closed end of the can extends outwardly of the inner surface of the side wall. The electrochemical cells are assembled using improved assembly methods. Button-type electrochemical cells made using the invention are free of the inward dishing common to especially cathode cans in such button cells.
Claims19
An electrode can for use in an electrochemical cell, said electrode can comprising:
- (a) a bottom, having a first inner surface, and a first outer surface having a substantially flat portion extending radially outwardly to a first outer perimeter of said first outer surface;
- (b) at least one side wall extending upwardly, away from said bottom, said at least one side wall having a second outer surface and a second inner surface;
- and
- (c) an intermediate element extending between said bottom and said at least one side wall, said bottom further comprising a first inner perimeter of said first inner surface, said intermediate element defining no more than an average radius of less than about 0.125 mm between said first inner perimeter of said first inner surface and said second inner surface of said at least one side wall.
An electrode can for use in an electrochemical cell, said electrode can comprising:
- (a) a bottom, having a first inner surface, and a first outer surface having a substantially flat portion extending radially outwardly to a first outer perimeter of said first outer surface;
- and
- (b) at least one side wall extending upwardly, away from said bottom, said at least one side wall having a second outer surface and a second inner surface, and an average thickness, between said second outer surface and said second inner surface, of about 0.110 mm about 0.130 mm,
- said substantially flat portion of said first outer surface of said bottom extending radially outwardly of said second inner surface of said at least one side wall.
An electrode can for use in an electrochemical cell, said electrode can comprising:
- (a) a bottom, having a first inner surface, and a first outer surface having a substantially flat portion extending radially outwardly to a first outer perimeter of said first outer surface;
- and
- (b) at least one side wall extending upwardly, away from said bottom, said at least one side wall having a second outer surface and a second inner surface, and an average thickness no greater than about 0.130 mm,
- said bottom and said at least one side wall being juxtaposed with respect to each other such that a force directed against said substantially flat portion of said first outer surface of said bottom can be transmitted away from said bottom, and into said at least one side wall, in a straight line extending through said at least one side wall and parallel to said second inner surface.
Dependencies are inferred from the claim text.