Button cells and method of producing same

US11735760B2 · kind B2 · utility

Assignee

• VARTA MICROBATTERY GMBH · DE

Inventors

• Eduard Pytlik · Ellwangen, DE
• Jürgen Lindner · Worms, DE
• Ulrich Barenthin · Ellwangen, DE
• Winfried Gaugler · Ellwangen, DE

Key dates

• Filing date: Feb 17, 2020
• Grant date: Aug 22, 2023
• Expiry date: Feb 17, 2040

Classification

• Technology area (CPC —): General

Abstract

A method for producing a button cell includes providing a cell cup, a cell top and an electrode-separator assembly winding, the electrode-separator assembly winding having a positive electrode and a negative electrode. An electrically insulating seal is applied at least to an outer portion of the cell top casing. The electrode-separator assembly winding is inserted into the cell top. The cell top is inserted into the cell cup to form a housing. A pressure is applied in a radial direction perpendicular to an axis of the electrode-separator assembly winding so as to seal the housing.