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US 6,074,781 AGranted
Electrochemical cell having increased anode-to-cathode interface area
AssigneeEveready Battery Company, Inc.
InventorRomulus P. Jurca
Life of this patent
Estimating the term…
Abstract
An electrochemical cell having a large anode-to-cathode interface area which achieves low current density to provide high cell efficiency. The electrochemical cell includes a can containing a first electrode and a second electrode. The first electrode has an outer perimeter which substantially conforms to the interior walls of the can and further has a non-cylindrical cavity provided therein. The second electrode is disposed within the non-cylindrical cavity of the first electrode. The first and second electrodes provide an interface area that varies along the length of the cell. A separator is disposed between the first and second electrodes and a cover and seal assembly is assembled to an open top end of the can.
Claims29
An electrochemical cell comprising:
- a container having a closed bottom end and an open top end;
- a first electrode disposed in said container, said first electrode having an outer perimeter which substantially conforms to the interior walls of said container and further having a non-cylindrical cavity provided therein;
- a second electrode disposed within said non-cylindrical cavity of said first electrode, wherein said first and second electrodes provide an interface area with a longitudinal cross-sectional shape that varies along the length of the cell;
- a separator disposed between said first electrode and said second electrode;
- and
- a cover and seal assembly assembled to said open top end of said container.
3 more elements
An electrochemical cell comprising:
- a container having a closed bottom end and an open top end;
- a first electrode disposed in said container, said first electrode having an outer perimeter which substantially conforms to the interior walls of said container and further having a non-cylindrical cavity provided therein;
- a second electrode disposed within said non-cylindrical cavity of said first electrode, wherein said first and second electrodes provide an interface area that varies along the length of the cell;
- a separator disposed between said first electrode and said second electrode;
- and
- a cover and seal assembly assembled to said open top end of said container, wherein said first electrode has a stepped inner surface defining said non-cylindrical cavity.
3 more elements
An electrochemical cell comprising:
- a container having a closed bottom end and an open top end;
- a first electrode disposed in said container, said first electrode having an outer perimeter which substantially conforms to the interior walls of said container and further having a non-cylindrical cavity provided therein;
- a second electrode disposed within said non-cylindrical cavity of said first electrode, wherein said first and second electrodes provide an interface area that varies along the length of the cell;
- a separator disposed between said first electrode and said second electrode;
- and
- a cover and seal assembly assembled to said open top end of said container, wherein said first electrode comprises a plurality of cathode rings having at least two different size interior diameters, said cathode rings being stacked one on top another in said container.
3 more elements
An electrochemical cell comprising:
- a conductive can having a closed bottom end and an open top end;
- a first electrode disposed in said container, said first electrode having an outer perimeter which conforms to the interior walls of said container and further having a non-cylindrical cavity provided therein, said non-cylindrical cavity having a cone-shaped configuration with a substantially round radial cross section along the length of the cell;
- a second electrode disposed within said non-cylindrical cavity of said first electrode;
- a separator disposed between said first electrode and said second electrode;
- and
- the cover and seal assembly assembled to said open top end of said container.
3 more elements
An electrochemical cell comprising:
- a conductive can having a closed bottom end and an open top end;
- a first electrode disposed in said container, said first electrode having an outer perimeter which conforms to the interior walls of said container and further having a non-cylindrical cavity provided therein, said non-cylindrical cavity having a substantially round radial cross section along the length of the cell;
- a second electrode disposed within said non-cylindrical cavity of said first electrode;
- a separator disposed between said first electrode and said second electrode;
- and
- the cover and seal assembly assembled to said open top end of said container, wherein said first electrode has a stepped inner surface defining said non-cylindrical cavity.
3 more elements
An electrochemical cell comprising:
- a conductive can having a closed bottom end and an open top end;
- a first electrode disposed in said container, said first electrode having an outer perimeter which conforms to the interior walls of said container and further having a non-cylindrical cavity provided therein, said non-cylindrical cavity having a substantially round radial cross section along the length of the cell;
- a second electrode disposed within said non-cylindrical cavity of said first electrode;
- a separator disposed between said first electrode and said second electrode;
- and
- the cover and seal assembly assembled to said open top end of said container, wherein said first electrode has undulations formed on the inner walls thereof to provide said non-cylindrical cavity.
3 more elements
An electrochemical cell comprising:
- a conductive can having a closed bottom end and an open top end;
- a first electrode disposed in said container, said first electrode having an outer perimeter which conforms to the interior walls of said container and further having a non-cylindrical cavity provided therein, said non-cylindrical cavity having a substantially round radial cross section along the length of the cell;
- a second electrode disposed within said non-cylindrical cavity of said first electrode;
- a separator disposed between said first electrode and said second electrode;
- and
- the cover and seal assembly assembled to said open top end of said container, wherein said first electrode comprises a plurality of cathode rings having at least two different size interior diameters, said cathode rings being stacked one on top another in said container.
3 more elements
A method of forming an electrochemical cell comprising the steps of:
- providing a container having a closed bottom end and an open top end;
- disposing a first electrode in said container so that said first electrode has an outer perimeter which substantially conforms to interior walls of said container and further has a non-cylindrical cavity provided therein;
- providing a separator in said non-cylindrical cavity of the first electrode;
- disposing a second electrode within said non-cylindrical cavity of said first electrode, wherein said first and second electrodes provide an interface area with a longitudinal cross-sectional shape that varies along the length of the cell;
- and
- assembling a cover and seal assembly to said open top end of said container.
3 more elements
A method of forming an electrochemical cell comprising the steps of:
- providing a container having a closed bottom end and an open top end;
- disposing a first electrode in said container so that said first electrode has an outer perimeter which substantially conforms to interior walls of said container and further has a non-cylindrical cavity provided therein;
- providing a separator in said non-cylindrical cavity of the first electrode;
- disposing a second electrode within said non-cylindrical cavity of said first electrode, wherein said first and second electrodes provide an interface area that varies along the length of the cell;
- and
- assembling a cover and seal assembly to said open top end of said container, wherein said step of disposing said first electrode and said container further includes disposing multiple cathode rings of at least two different inner diameters.
3 more elements
A method of forming an electrochemical cell comprising the steps of:
- providing a container having a closed bottom end and an open top end;
- disposing a first electrode in said container so that said first electrode has an outer perimeter which substantially conforms to interior walls of said container and further has a non-cylindrical cavity provided therein, said non-cylindrical cavity having a cone-shaped configuration with a substantially round radial cross section throughout the length of the cell;
- providing a separator in said non-cylindrical cavity of the first electrode;
- disposing a second electrode within said non-cylindrical cavity of said first electrode;
- and
- assembling a cover and seal assembly to said open top end of said container.
3 more elements
A method of forming an electrochemical cell comprising the steps of:
- providing a container having a closed bottom end and an open top end;
- disposing a first electrode in said container so that said first electrode has an outer perimeter which substantially conforms to interior walls of said container and further has a non-cylindrical cavity provided therein, said non-cylindrical cavity having a substantially round radial cross section throughout the length of the cell;
- providing a separator in said non-cylindrical cavity of the first electrode;
- disposing a second electrode within said non-cylindrical cavity of said first electrode;
- and
- assembling a cover and seal assembly to said open top end of said container, wherein said step of disposing said first electrode in said container further includes disposing multiple cathode rings of at least two different inner diameters.
3 more elements
A method of forming an electrochemical cell comprising the steps of:
- providing a container having a closed bottom end and an open top end;
- disposing a first electrode in said container so that said first electrode has an outer perimeter which substantially conforms to interior walls of said container and further has a non-cylindrical cavity provided therein, said non-cylindrical cavity having a substantially round radial cross section throughout the length of the cell;
- providing a separator in said non-cylindrical cavity of the first electrode;
- disposing a second electrode within said non-cylindrical cavity of said first electrode;
- and
- assembling a cover and seal assembly to said open top end of said container, wherein said step of disposing said first electrode in said container further comprises forming undulations in the inner walls of said first electrode to provide for said non-cylindrical cavity.
3 more elements
Dependencies are inferred from the claim text.