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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.:

US 11276875 B1

PDFFull Text
Date of Patent:
Mar. 15, 2022

Filed:

Mar. 06, 2020

Button cells and method of producing same

Applicant:

Varta Microbattery Gmbh, Ellwangen, DE;

Inventors:

Eduard Pytlik, Ellwangen, DE;

Jürgen Lindner, Ellwangen, DE;

Ulrich Barenthin, Ellwangen, DE;

Winfried Gaugler, Ellwangen, DE;

Assignee:

VARTA MICROBATTERY GMBH, Ellwangen, DE;

Attorney:

Leydig, Voit & Mayer, Ltd.

Primary Examiner:

Cynthia H Kelly

Assistant Examiner:

Julian Anthony

Int. Cl.
CPC ...
H01M 4/00 (2006.01); H01M 6/10 (2006.01); H01M 6/12 (2006.01); H01M 6/46 (2006.01); H01M 2/02 (2006.01); H01M 6/08 (2006.01); H01M 4/13 (2010.01); H01M 4/58 (2010.01); H01M 10/04 (2006.01); H01M 10/05 (2010.01); H01M 10/24 (2006.01); H01M 10/34 (2006.01); H01M 50/109 (2021.01); H01M 50/124 (2021.01); H01M 10/0525 (2010.01);
U.S. Cl.
CPC ...
H01M 10/0431 (2013.01); H01M 6/10 (2013.01); H01M 10/0427 (2013.01); H01M 10/05 (2013.01); H01M 10/0525 (2013.01); H01M 10/24 (2013.01); H01M 10/34 (2013.01); H01M 10/345 (2013.01); H01M 50/109 (2021.01); H01M 50/124 (2021.01); Y02E 60/10 (2013.01); Y02P 70/50 (2015.11); Y10T 29/4911 (2015.01); Y10T 29/49108 (2015.01);
Abstract

A method for producing a button cell includes providing a cell cup, the cell cup having a flat bottom area and a cell cup casing; providing a cell top, the cell top having a flat top area and a cell top casing having a first height; and providing an electrode-separator assembly winding. The cell top casing and the cell cup casing form an overlap area extending in a direction parallel to the axis of the winding and having a second height, the second height being between 20% and 99% of the first height. The method includes applying, in a radial direction perpendicular to the axis of the winding, a pressure on the cell cup casing so as to seal the housing, wherein a portion of the cell top casing that is cylindrical forms at least a part of the overlap area.

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