Metal working – Method of mechanical manufacture – Electrical device making
Patent
1980-04-29
1982-01-12
Crane, Daniel C.
Metal working
Method of mechanical manufacture
Electrical device making
29507, 29523, 429128, H01M 408, H01M 600
Patent
active
043098177
ABSTRACT:
A method for assembling a primary electrochemical cell including a carbon cathode structure. The carbon cathode structure is assembled by arranging a selected number of individual annular-shaped porous carbon elements, each having an opening extending therethrough, together with an elongated, hollow, cylindrical metal current collector tube so that the carbon elements are in a stacked array and the tube is loosely disposed within and along the openings in the array of carbon elements. The current collector tube is an expandable member and is initially in a non-expanded state and loosely surrounded by the stacked array of carbon elements. A porous separator and an anode structure are then placed around the aforementioned assembly of the carbon elements and the current collector tube, and the resultant assembly, representing a battery stack, is placed within an elongated housing of an electrochemical cell. A tool is then employed to permanently expand the current collector tube outwardly so that the tube makes direct physical contact with the array of carbon elements. An electrolytic solution is placed within the cell in contact with the battery stack and the hollow opening of the tube. The electrolytic solution permeates the carbon elements directly and also by way of a large number of small holes formed in the tube, causing the porous carbon elements to be permeated with the electrolytic solution and expand outwardly. The expansion of the carbon elements causes constituent particles thereof to fill the openings in the current collector thus thereby permanently locking the carbon elements to the current collector tube.
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Goebel Franz
Hansen Ibsen R.
Crane Daniel C.
GTE Products Corporation
Xiarhos Peter
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