초록

A button cell having an air cathode assembly wherein grooves are constructed between the cathode and cell container to provide a gas diffusion passage from a port extending through the container to the face of the air cathode.

대표청구항 ▼

In a button cell having air cathode assembly, a metallic anode and an electrolyte, said air cathode assembly, anode and electrolyte being housed in a cell assembly comprising an anode can, the open end thereof extending into a cathode can with a grommet compressed therebetween and wherein, when asse

In a button cell having air cathode assembly, a metallic anode and an electrolyte, said air cathode assembly, anode and electrolyte being housed in a cell assembly comprising an anode can, the open end thereof extending into a cathode can with a grommet compressed therebetween and wherein, when assembled, said cathode can includes at least one port in the bottom thereof communicating with the exterior of the cell, the improvement comprises: (a) a plurality of grooves in at least one of: (1) the interior bottom face of said cathode can, and (2) the face of said cathode assembly abutting said interior bottom face of said cathode in the vicinity of said at least one port to thereby define gas diffusion passages communicating with said port and said cathode assembly at a plurality of loci remote from said port, said grooves, terminating at a perimeter within the perimeters of both said cathode assembly and said interior bottom face of said cathode can to thereby provide abutting, ungrooved peripheries; and (b) an additional volume within said button cell, created by compressing said air cathode assembly and said cathode can together in a sealing configuration at said abutting ungrooved peripheries.