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:
May. 09, 2000
Filed:
Dec. 09, 1997
Hans Jurgen Lindner, Singapore, SG;
Varta Batterie Aktiengesellschaft, Hannover, DE;
Abstract
The invention relates to a rechargeable button cell, which contains negative and positive electrodes in the form of tablets separated by a separator and an alkaline electrolyte in a casing which is formed from a lower part in the form of a cup and an upper part in the form of a lid which fits therein, the casing parts being sealed in a gas-tight manner by swaging or crimping with the interposition of a sealing ring. The button cells according to the invention have a sealing ring (4) which has on the edge pointing into the button cell at least 3 retaining tabs (9) which hold and center the electrode tablet (3) located in the casing upper part (1). The method according to the invention for manufacturing the button cell is distinguished by separate prior assembly of the casing lower part with the positive electrode and the casing upper part with the negative electrode.