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:
Aug. 04, 2009
Filed:
Sep. 18, 2006
Jochen Graeber, Bissingen, DE;
Georg Breuch, Greven, DE;
Jochen Graeber, Bissingen, DE;
Georg Breuch, Greven, DE;
Metabowerke GmbH, Nuertingen, DE;
Friwo-Geraetebau GmbH, Ostbevern, DE;
Abstract
A rechargeable battery pack (), in particular, for use with electrical hand tool devices, comprises a first and a second charging connection (), and a third control connection (), all three being connectable to a charging device () for producing a charging connection, and with a calculating means () which can be addressed via an interface circuit (), wherein the interface circuit uses the third control connection (). In order to prevent destruction of the rechargeable battery pack due to erroneous charging, a non-linear component () is disposed in the interface circuit () which, upon control of the interface circuit () by the charging device (), can be distinguished from an NTC component, thereby permitting detection of the rechargeable battery type when the calculating means () provides no identification information in response to control by the charging device ().