The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 10, 1998
Filed:
Apr. 26, 1996
Applicant:
Inventors:
Walter C Sunderland, Minnetonka, MN (US);
Anthony W Rorvick, Brooklyn Park, MN (US);
Donald R Merritt, Brooklyn Center, MN (US);
Craig L Schmidt, Eagan, MN (US);
David P Haas, Brooklyn Park, MN (US);
Assignee:
Medtronic, Inc., Minneapolis, MN (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01M / ; H01M / ; H01M / ; H01M / ;
U.S. Cl.
CPC ...
429 66 ; 429162 ; 429164 ; 429181 ; 429211 ; 429233 ; 429241 ; 296231 ;
Abstract
An electrochemical cell has a cathode material formed into a pellet shape which expands as the cell is discharged. A cathode current collector circumferentially surrounds the cathode pellet and is in contact with the peripheral edge of the cathode pellet to prevent peripheral cathode expansion. The peripheral cathode current collector maintains a stable cell impedance during cell discharge.