US 12,334,514 B2
Cylindrical electrochemical cells and method of manufacture
David C. Batson, Winchester, MA (US); Rex Withers, Mashpee, MA (US); and James E. Dawson, Macomb, MI (US)
Assigned to Lithium Werks Technology BV, Enschede (NL)
Filed by Lithium Werks Technology BV, Enschede (NL)
Filed on Mar. 31, 2023, as Appl. No. 18/129,644.
Application 18/129,644 is a continuation of application No. 16/519,836, filed on Jul. 23, 2019, granted, now 11,631,902.
Application 16/519,836 is a continuation of application No. 15/115,220, granted, now 10,381,688, issued on Aug. 13, 2019, previously published as PCT/US2015/010912, filed on Jan. 9, 2015.
Claims priority of provisional application 61/932,484, filed on Jan. 28, 2014.
Prior Publication US 2023/0253631 A1, Aug. 10, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 10/0587 (2010.01); H01M 10/04 (2006.01); H01M 10/052 (2010.01); H01M 10/0525 (2010.01)
CPC H01M 10/0587 (2013.01) [H01M 10/0431 (2013.01); H01M 10/052 (2013.01); H01M 10/0525 (2013.01)] 37 Claims
OG exemplary drawing
 
1. An electrochemical storage cell fabrication method, comprising:
winding a first electrode sheet and a second electrode sheet around a cylindrical core to form a jellyroll structure;
the first and second electrode sheets each comprising uncoated conductive edges parallel to end faces of the jellyroll structure and coated opposing surfaces between the uncoated conductive edges;
winding a first separator sheet and a second separator sheet around the cylindrical core wherein the first and the second separator sheets are positioned between the first and second electrode sheets to mechanically and electrically separate the coated opposing surfaces of the first electrode sheet and the second electrode sheet and to mechanically and electrically separate the cylindrical core and the coated opposing surfaces; and
cutting out slots from the uncoated conductive edges of the first and second electrode sheets to form slotted cutouts, wherein the slotted cutouts are angularly co-located relative to the cylindrical core upon forming the jellyroll structure.
 
7. An electrochemical storage cell, comprising:
a first electrode sheet and a second electrode sheet;
the first and second electrode sheets wound around a cylindrical core forming a jellyroll structure; wherein the first and second electrode sheets each comprise uncoated conductive edges parallel to end faces of the jellyroll structure and coated opposing surfaces between the uncoated conductive edges;
a first separator sheet and a second separator sheet, wherein the first and second separator sheets mechanically and electrically separate the coated opposing surfaces of the first and second electrode sheets and mechanically and electrically separate the cylindrical core and the coated opposing surfaces of the first electrode sheet; and
slotted cutouts from the uncoated conductive edges, the slotted cutouts angularly co-located relative to the cylindrical core upon forming the jellyroll structure.
 
17. An electrochemical storage cell fabrication method, comprising:
winding a first electrode sheet and a second electrode sheet around a cylindrical core to form a jellyroll structure;
the first electrode and the second electrode sheets comprising uncoated conductive edges parallel to end faces of the jellyroll structure and coated opposing surfaces between the uncoated conductive edges;
winding a first separator sheet and a second separator sheet around the cylindrical core;
modifying portions of the uncoated conductive edges of the first and second electrode sheets;
after the modifying, contacting the modified portions of the uncoated conductive edge of the first electrode sheet with one another; and
after the modifying, contacting the modified portions of the uncoated conductive edge of the second electrode sheet with one another.
 
36. An electrochemical storage cell fabrication method, comprising:
winding a first electrode sheet and a second electrode sheet around a cylindrical core to form a jellyroll structure;
the first electrode and the second electrode sheets comprising uncoated conductive edges parallel to end faces of the jellyroll structure and coated opposing surfaces between the uncoated conductive edges;
winding a first separator and a second separator around the cylindrical core; and
wherein the first and the second separators are positioned between the first and second electrode sheets to mechanically and electrically separate the coated opposing surfaces of the first electrode sheet and the second electrode sheet and to mechanically and electrically separate the cylindrical core and the coated opposing surfaces.
 
37. An electrochemical storage cell fabrication method, comprising:
winding a first electrode sheet and a second electrode sheet around a cylindrical core to form a jellyroll structure;
the first electrode and the second electrode sheets comprising uncoated conductive edges parallel to end faces of the jellyroll structure and coated opposing surfaces between the uncoated conductive edges;
winding a first separator sheet and a second separator sheet around the cylindrical core; and
cutting out slots from the uncoated conductive edges of the first electrode and the second electrode sheets to form slotted cutouts, wherein the slotted cutouts are angularly co-located relative to the cylindrical core upon forming the jellyroll structure.