Patents by Inventor Frank Helkmer

Frank Helkmer 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).

  • Method for determining the amount of charge which can still be drawn from an energy storage battery, and an energy storage battery
    Patent number: 6861842
    Abstract: A method for determining the amount of charge which can still be drawn from an energy storage battery includes measuring current values and voltage values at at least two times in a voltage response of the energy storage battery to at least one current pulse, with one voltage/current value pair being obtained for each of the at least two times. The method also includes calculating a resistance difference characteristic variable utilizing the measured voltage/current value pairs. The method also includes determining of the amount of charge which can still be drawn from the energy storage battery utilizing the resistance difference characteristic variable. An energy storage battery having measurement means and processor-controlled evaluation means may be provided for carrying out the method.
    Type: Grant
    Filed: July 16, 2003
    Date of Patent: March 1, 2005
    Assignee: VB Autobatterie GmbH
    Inventors: Peter Baeuerlein, Frank Helkmer, Eberhard Meissner, Ingo Koch