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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 8836251 B1

PDFFull Text
Date of Patent:
Sep. 16, 2014

Filed:

Feb. 18, 2011

Drive system and machine

Applicant:

Nejat Mahdavi Tabatabaei, Lindau, DE;

Inventor:

Nejat Mahdavi Tabatabaei, Lindau, DE;

Assignee:

Liebherr-Components Biberach GmbH, Biberach an der Riss, DE;

Attorney:

Dilworth & Barrese, LLP.

Primary Examiner:

Antony M Paul

Int. Cl.
CPC ...
B23Q 5/28 (2006.01); B60L 11/18 (2006.01); B60L 1/00 (2006.01); H01M 8/04 (2006.01); H01M 16/00 (2006.01); H02J 7/14 (2006.01); B60L 11/00 (2006.01); H02J 7/34 (2006.01); H01M 8/06 (2006.01); H02J 1/00 (2006.01);
U.S. Cl.
CPC ...
H02J 7/1423 (2013.01); B60L 11/1887 (2013.01); Y02T 10/92 (2013.01); H02J 7/345 (2013.01); B60L 1/20 (2013.01); Y02T 10/7022 (2013.01); B60L 11/1881 (2013.01); H01M 8/0612 (2013.01); Y02T 90/32 (2013.01); H01M 2250/00 (2013.01); H02J 2001/004 (2013.01); Y02T 10/7216 (2013.01); B60L 2200/40 (2013.01); H01M 8/04865 (2013.01); Y02T 90/34 (2013.01); H01M 16/003 (2013.01); B60L 2210/10 (2013.01); Y02E 60/50 (2013.01); H01M 2250/20 (2013.01); B60L 11/005 (2013.01);
Abstract

The present invention relates to a drive system with energy recovery for driving a machine, in particular for driving a crane, wherein the drive system includes at least one fuel cell unit, at least one capacitive energy storage unit and at least one drive motor, and wherein the fuel cell unit and the energy storage unit are connected in parallel and feed at least one drive motor. According to the invention, the capacitive energy storage unit is dimensioned such that the differential voltage occurring during operation between the fuel cell unit and the capacitive energy storage unit is minimized to such an extent that the current caused by the voltage within the parallel connection of fuel cell unit and energy storage unit does not exceed a defined safe limit value, wherein the fuel cell unit and the energy storage unit are directly coupled with each other and with the remaining drive components without DC/DC converter. The invention furthermore relates to a machine which includes the drive system according to the invention.

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