Patents by Inventor Friedhelm Walkling

Friedhelm Walkling has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 12665213
    Abstract: A system includes a stack module box, within which is accommodated a fuel cell stack and which stack module box has at least one fuel cell, the fuel cell being in connection with a plurality of media guides leading to the stack module box and from which media can be delivered to the stack module box or received from the stack module box, wherein at least two of the media guides have electrically conductive regions for discharge of current from the fuel cell stack, and/or the wall of the stack module box is electrically conductive in the regions laying opposite to the media guides, and wherein connection lines are led away from the fuel cell stack to the electrically conductive regions and away therefrom. A fuel cell device and a fuel cell vehicle including such a stack module box are also provided.
    Type: Grant
    Filed: July 15, 2021
    Date of Patent: June 23, 2026
    Assignees: Volkswagen AG, kraftwerk ASSETS Inc.
    Inventors: Sascha Kühn, Lutz Heinrich, Heiko Turner, Dirk Jenssen, Christian Schlitzberger, Martin Buchenberger, Friedhelm Walkling, Florian Moll, Steffen Wieland, Christin Zimmermann
  • Publication number: 20230261236
    Abstract: A system includes a stack module box, within which is accommodated a fuel cell stack and which stack module box has at least one fuel cell, the fuel cell being in connection with a plurality of media guides leading to the stack module box and from which media can be delivered to the stack module box or received from the stack module box, wherein at least two of the media guides have electrically conductive regions for discharge of current from the fuel cell stack, and/or the wall of the stack module box is electrically conductive in the regions laying opposite to the media guides, and wherein connection lines are led away from the fuel cell stack to the electrically conductive regions and away therefrom. A fuel cell device and a fuel cell vehicle including such a stack module box are also provided.
    Type: Application
    Filed: July 15, 2021
    Publication date: August 17, 2023
    Inventors: Sascha KÜHN, Lutz HEINRICH, Heiko TURNER, Dirk JENSSEN, Christian SCHLITZBERGER, Martin BUCHENBERGER, Friedhelm WALKLING, Florian MOLL, Steffen WIELAND, Christin ZIMMERMANN
  • Publication number: 20230246207
    Abstract: A fuel cell stack comprises at least one fuel cell which is accommodated in a stack module box, a plurality of media channels, having media guides which are arranged on the outside of the stack module box and are in flow connection with the media channels, and a tensioning system which is guided around the stack module box and the tensioning device of which is guided around the media guides, which are designed with a spring function. A related fuel cell device and a fuel cell vehicle are also provided.
    Type: Application
    Filed: July 15, 2021
    Publication date: August 3, 2023
    Inventors: Sascha KÜHN, Lutz HEINRICH, Heiko TURNER, Dirk JENSSEN, Christian SCHLITZBERGER, Martin BUCHENBERGER, Friedhelm WALKLING, Florian MOLL, Steffen WIELAND, Christin ZIMMERMANN
  • Patent number: 10790520
    Abstract: The invention relates to a fuel cell (10) having a stack comprising a bipolar plate (20) which has a flow field (22) formed by a profiled section of the bipolar plate (20), and an elongated sealing element (21) which at least partially surrounds the flow field (22), and a membrane electrode assembly (30). It is provided that, inside a cavity (25) formed between the membrane electrode assembly (30) and the bipolar plate (20) in a region between the sealing element (21) and the flow field (22), a filling agent (24) is arranged which extends in the extension direction of the cavity (25).
    Type: Grant
    Filed: October 8, 2015
    Date of Patent: September 29, 2020
    Assignee: Audi AG
    Inventors: Christian Martin Zillich, Friedhelm Walkling
  • Patent number: 10158141
    Abstract: A fuel cell system (100), which includes multiple fuel cell stacks (10, 20) having a pair of adjacent fuel cell stacks (10, 20), namely a first fuel cell stack (10) and a second fuel cell stack (20), each including multiple fuel cells (2), as well as multiple main channels (11, 12, 13) which penetrate the fuel cell stacks (10, 20) for distributing the operating agents to the individual fuel cells (2) is provided. It is provided that the fuel cell stacks (10, 20) of one pair are situated in such a way that a sequence of the main channels (11, 12, 13) is mirror-symmetrical to a plane running between the adjacent fuel cell stacks (10, 20) of the pair, with respect to the different operating agents.
    Type: Grant
    Filed: January 12, 2016
    Date of Patent: December 18, 2018
    Assignees: Volkswagen AG, Audi AG
    Inventors: Christian Martin Zillich, Friedhelm Walkling
  • Publication number: 20170317361
    Abstract: The invention relates to a fuel cell (10) having a stack comprising a bipolar plate (20) which has a flow field (22) formed by a profiled section of the bipolar plate (20), and an elongated sealing element (21) which at least partially surrounds the flow field (22), and a membrane electrode assembly (30). It is provided that, inside a cavity (25) formed between the membrane electrode assembly (30) and the bipolar plate (20) in a region between the sealing element (21) and the flow field (22), a filling agent (24) is arranged which extends in the extension direction of the cavity (25).
    Type: Application
    Filed: October 8, 2015
    Publication date: November 2, 2017
    Inventors: Christian Martin ZILLICH, Friedhelm WALKLING
  • Publication number: 20160204461
    Abstract: A fuel cell system (100), which includes multiple fuel cell stacks (10, 20) having a pair of adjacent fuel cell stacks (10, 20), namely a first fuel cell stack (10) and a second fuel cell stack (20), each including multiple fuel cells (2), as well as multiple main channels (11, 12, 13) which penetrate the fuel cell stacks (10, 20) for distributing the operating agents to the individual fuel cells (2) is provided. It is provided that the fuel cell stacks (10, 20) of one pair are situated in such a way that a sequence of the main channels (11, 12, 13) is mirror-symmetrical to a plane running between the adjacent fuel cell stacks (10, 20) of the pair, with respect to the different operating agents.
    Type: Application
    Filed: January 12, 2016
    Publication date: July 14, 2016
    Inventors: Christian Martin Zillich, Friedhelm Walkling