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:
Jul. 14, 2015
Filed:
Dec. 21, 2011
Seth M. Humphrys, Golden Valley, MN (US);
Seth M. Humphrys, Golden Valley, MN (US);
Medtronic, Inc., Minneapolis, MN (US);
Abstract
An electric storage battery including a jelly roll type electrode assembly having a mandrel. The mandrel includes a positive portion, a negative portion and a removable portion. The mandrel can be planar, having two faces with grooves on the positive and negative portions. The grooves are dimensioned to accommodate positive and negative feedthrough pins. The mandrel is welded to the feedthrough pins by using a laser beam incident on the opposite face of the mandrel from the face on which the grooves and pins are located. The laser beam melts the mandrel such that molten mandrel material fills the grooves welding the feedthrough pins in place. Electrodes are wrapped around the mandrel using the removable portion to wind the mandrel. The removable portion can be detached. The mandrel allows tighter wrapping of the jelly roll assembly and increasing battery miniaturization.