Metal-air cathode button cell
Patent
·
OSTI ID:5577884
A button cell is described having air cathode assembly, a metallic anode and an electrolyte, the 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, the cathode can includes at least one port in the bottom thereof communicating with the exterior of the cell. The improvement described here consists of: (a) grooves in at least one of: (1) the interior bottom face of the cathode (2) the face of the cathode assembly abutting the interior bottom face of the cathode in the vicinity of at least one port to thereby define gas diffusion passages communicating with the port and the cathode assembly at a plurality of loci remote from the port, the grooves, terminating at a perimeter within the perimeters of both the cathode assembly and the interior bottom face of the cathode can to thereby provide abutting, ungrooved peripheries; and (b) an additional volume within the button cell, created by compressing the air cathode assembly and the cathode can together in a sealing configuration at the abutting ungrooved peripheries.
- Assignee:
- Rayovac Corp., Madison, WI
- Patent Number(s):
- US 4591539
- OSTI ID:
- 5577884
- Country of Publication:
- United States
- Language:
- English
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