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. 27, 2003
Filed:
Jan. 25, 2002
Rainer Haid, Ellwangen, DE;
Peter Birke, Ellwangen, DE;
Konrad Holl, Aalen-Dewangen, DE;
Dejan Ilic, Ellwangen, DE;
Microbatterie GmbH, , DE;
Abstract
A method for monitoring the operational reliability of rechargeable lithium cells including measuring the cell voltage and cell temperature, the cell is discharged if a predetermined cell limit voltage (U ) and a predetermined ambient limit temperature T are exceeded at the same time, until a predetermined lower voltage level or a predetermined lower ambient temperature is reached. A circuit for carrying out the method has a first threshold value switch which responds when a predetermined upper limit voltage (U ) is exceeded in the cell, and a second threshold value switch (C) which responds when a predetermined ambient temperature limit (T ) is exceeded, and has a logic circuit (E) which connects (G) the cell to a load when the first and second threshold value switches respond at the same time, wherein both threshold value switches (C, D) are configured such that they trip when a lower cell voltage or a lower ambient temperature is reached.