Patents by Inventor Michael Kohl

Michael Kohl 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: 11765792
    Abstract: The disclosure relates to a PTC heating module for heating a fluid and a method for producing such a PTC heating module. The PTC heating module includes a plurality of PTC thermistors having main surfaces disposed opposite to one another and spaced apart relative to one another in a thickness direction. The PTC thermistors are arranged between two contact plates next to one another transversely to the thickness direction and spaced apart relative to one another. The main surfaces of the PTC thermistors are electrically contacted with a contact surface of the two contact plates. At least one dielectric function element is arranged between the two contact plates and laterally sealingly engages about the respective PTC thermistors to at least partially fill a hollow space between the two contact plates and facilitate enlarging a creepage distance between the two contact plates within the hollow space.
    Type: Grant
    Filed: October 30, 2019
    Date of Patent: September 19, 2023
    Inventors: Alexander Daniel, Michael Kohl, Jonas Caspar Schwenzer, Wolfgang Seewald, Falk Viehrig
  • Patent number: 11420499
    Abstract: An electric heating device and a method for manufacturing an electric heating device with at least two plate pairs forming a fluid passage through which fluid can flow, which plate pairs are assembled from two plates and form a fluid passage between the two, wherein the plate pairs take on a predefined distance from one another and form a free space, wherein at least one heating unit is arranged in the free space between at least two of the plate pairs, which heating unit has at least one heating element and contact electrodes electrically connected thereto for making electrical contact with the at least one heating element. The invention also relates to such an electric heating device.
    Type: Grant
    Filed: September 11, 2019
    Date of Patent: August 23, 2022
    Assignee: MAHLE International GmbH
    Inventors: Igor Tschemeris, Alexander Daniel, Karim-Mathieu Bouchalat, Michael Kohl
  • Publication number: 20210410232
    Abstract: An electric heating device for heating a temperature-control fluid may include two electrodes, a heating element, and an elevation. The two electrodes may each include an electrode body with an inner surface. The heating element may include two electrical connecting surfaces disposed opposite one another. The heating element may be arranged between the two electrodes such that each connecting surface faces the inner surface of a respective one of the two electrodes. A joint may be delimited by the inner surface of an electrode and the associated connecting surface of the heating element. The joint may be filled with an adhesive via which the electrode is connected to the heating element in an integrally bonded manner. The elevation may project into the joint from the inner surface delimiting the joint. The elevation may lie against the associated connecting surface and electrically connect the electrode to the associated connecting surface.
    Type: Application
    Filed: June 28, 2021
    Publication date: December 30, 2021
    Inventors: Michael Kohl, Peter Schluenzen, Wolfgang Seewald, Falk Viehrig, Denis Wiedmann
  • Patent number: 10964460
    Abstract: A PTC thermistor module for a temperature control device may include at least one PTC thermistor element. The PTC thermistor element may include an upper side and an underside facing away from the upper side. The upper side and on the underside may be respectively applied in a heat-exchanging manner with a heat-conducting plate. An edge side, connecting the upper side and the underside with one another in an edge-side manner, of at least one of the PTC thermistor elements, may be applied to a heat-conducting element, which has a thermal conductivity of at least 5 W/mK. A temperature control device may include at least one such PTC thermistor module.
    Type: Grant
    Filed: April 8, 2019
    Date of Patent: March 30, 2021
    Inventors: Michael Kohl, Falk Viehrig, Denis Wiedmann
  • Publication number: 20210020979
    Abstract: According to the invention, an electrolyte is provided for an alkali-sulfur battery. An alkali-sulfur battery is also provided, which contains the electrolyte according to the invention. The electrolyte according to the invention contains a mixture of a sulphone and a fluorine-containing ether in a volume ratio of #1:4 (v:v). Through the use of said electrolyte, the shuttling of polysulphide species from the cathode to the anode can be effectively suppressed, without the use of LiNO3. Through the electrolyte in alkali-sulfur batteries, a high coulombic efficiency, long-term stability (low self-discharge) and cycle durability can be achieved even without the use of LiNO3. Coloumbic efficiency, long-term stability and cycle durability can be further improved through the use of a cathode which contains an additive for uniform distribution of polysulphide inside the cathode. In addition, uses of components of the alkali-sulfur battery according to the invention are also disclosed.
    Type: Application
    Filed: September 29, 2020
    Publication date: January 21, 2021
    Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E. V.
    Inventors: Sören THIEME, Holger ALTHUES, Stefan KASKEL, Michael KOHL
  • Patent number: 10818419
    Abstract: A PTC thermistor element for a tempering device may include a main body, which may have a positive temperature coefficient. The main body may have PTC thermistor components, a core, and ceramics components at least in the core. The PTC thermistor components may have a positive temperature coefficient, and the ceramics components may have a thermal conductivity of at least 2.5 W/mK. The ceramics components may be disposed in a distributed manner.
    Type: Grant
    Filed: April 8, 2019
    Date of Patent: October 27, 2020
    Assignee: MAHLE INTERNATIONAL GMBH
    Inventors: Michael Kohl, Eric Marlier, Stefan Paetzold, David Rollet, Falk Viehrig, Denis Wiedmann
  • Patent number: 10780762
    Abstract: An electrical heating device (1) includes a housing (2, 102) having a fluid inlet (3) for the intake of a fluid to be heated into the housing (2, 102) and having a fluid outlet (4) for the discharge of the fluid from the housing (2, 102). A flow channel (5) for the fluid is formed between the fluid inlet (3) and fluid outlet (4), and at least one heating instrument (6, 105, 205) extends into the flow channel (5) in the housing (2, 102). This heating instrument has a sleeve (7, 207) that surrounds an interior of the heating instrument (6, 105, 205) in a fluid-tight way. At least one heating element (8, 208) is arranged in the sleeve (7, 207), and at least one sensor element (9, 109, 209) is arranged in the sleeve (7, 207) for monitoring the temperature of the at least one heating element (8, 208).
    Type: Grant
    Filed: May 4, 2018
    Date of Patent: September 22, 2020
    Assignee: Türk & Hillinger Automotive GmbH
    Inventors: Michael Kohl, Karl-Gerd Krumbach, Wolfgang Seewald, Igor Tschemeris, Christoph Fodor, Andreas Schlipf
  • Publication number: 20200137837
    Abstract: The disclosure relates to a PTC heating module for heating a fluid and a method for producing such a PTC heating module. The PTC heating module includes a plurality of PTC thermistors having main surfaces disposed opposite to one another and spaced apart relative to one another in a thickness direction. The PTC thermistors are arranged between two contact plates next to one another transversely to the thickness direction and spaced apart relative to one another. The main surfaces of the PTC thermistors are electrically contacted with a contact surface of the two contact plates. At least one dielectric function element is arranged between the two contact plates and laterally sealingly engages about the respective PTC thermistors to at least partially fill a hollow space between the two contact plates and facilitate enlarging a creepage distance between the two contact plates within the hollow space.
    Type: Application
    Filed: October 30, 2019
    Publication date: April 30, 2020
    Inventors: Alexander Daniel, Michael Kohl, Jonas Caspar Schwenzer, Wolfgang Seewald, Falk Viehrig
  • Patent number: 10616959
    Abstract: The invention relates to an electric heating device with at least one electrically heatable heating element or with a plurality of electrically heatable heating elements, wherein at least one radiator element is thermally connected to the at least one heating element in order to heat a fluid flow, which flows against and/or around and/or through the at least one radiator element, wherein each heating element has at least one heater which heats up when electric current flows through the heater, wherein electrode elements are provided for electrically contacting the heater, wherein the electrode elements contacting a heater are arranged spaced from one another and accommodate at least one of the heater between them, wherein at least two heater are electrically interconnected in series.
    Type: Grant
    Filed: April 25, 2018
    Date of Patent: April 7, 2020
    Assignee: MAHLE International GmbH
    Inventors: Michael Kohl, Falk Viehrig
  • Publication number: 20200079180
    Abstract: An electric heating device and a method for manufacturing an electric heating device with at least two plate pairs forming a fluid passage through which fluid can flow, which plate pairs are assembled from two plates and form a fluid passage between the two, wherein the plate pairs take on a predefined distance from one another and form a free space, wherein at least one heating unit is arranged in the free space between at least two of the plate pairs, which heating unit has at least one heating element and contact electrodes electrically connected thereto for making electrical contact with the at least one heating element. The invention also relates to such an electric heating device.
    Type: Application
    Filed: September 11, 2019
    Publication date: March 12, 2020
    Applicant: MAHLE International GmbH
    Inventors: Igor TSCHEMERIS, Alexander DANIEL, Karim-Mathieu BOUCHALAT, Michael KOHL
  • Publication number: 20190387581
    Abstract: A PTC heating module for heating a fluid may include at least one first electrically conductive contact electrode and at least one second electrically conductive contact electrode arranged spaced apart from each other, at least one insulator layer attached to the at least one first contact electrode and the at least one second contact electrode, and at least one PTC thermistor element having a thickness. The at least one PTC thermistor element may have a first main surface and a second main surface disposed opposite each other relative to the thickness. The at least one first contact electrode may be in contact with a contact area of the first main surface and the at least one second contact electrode may be in contact with a contact area of the second main surface. At least one of a clearance distance and a creepage distance may be greater than the thickness.
    Type: Application
    Filed: June 17, 2019
    Publication date: December 19, 2019
    Inventors: Michael Kohl, Eric Marlier, Stefan Paetzold, Falk Viehrig
  • Publication number: 20190387582
    Abstract: A PTC heating module for heating a fluid may include two contact plates between which at least one cuboid PTC thermistor is arranged and at least one contact socket with a contact side. The PTC thermistor may have two main sides disposed opposite each other and defining a thermistor thickness therebetween. The contact side of the at least one contact socket may rest against a first main side of the at least one PTC thermistor and another side may rest against a first contact plate. A geometric contact surface between the first main side and the contact side of the at least one contact socket may be smaller than a geometric surface of the first main side. A clearance distance extending between the two contact plates and a creapage distance extending from the at least one contact socket to a second contact plate may be larger than the thermistor thickness.
    Type: Application
    Filed: June 17, 2019
    Publication date: December 19, 2019
    Inventors: Michael Kohl, Stefan Paetzold, Tim Teichmann, Falk Viehrig
  • Publication number: 20190311824
    Abstract: A PTC thermistor module for a temperature control device may include at least one PTC thermistor element. The PTC thermistor element may include an upper side and an underside facing away from the upper side. The upper side and on the underside may be respectively applied in a heat-exchanging manner with a heat-conducting plate. An edge side, connecting the upper side and the underside with one another in an edge-side manner, of at least one of the PTC thermistor elements, may be applied to a heat-conducting element, which has a thermal conductivity of at least 5 W/mK. A temperature control device may include at least one such PTC thermistor module.
    Type: Application
    Filed: April 8, 2019
    Publication date: October 10, 2019
    Inventors: Michael Kohl, Falk Viehrig, Denis Wiedmann
  • Publication number: 20190311825
    Abstract: A PTC thermistor element for a tempering device may include a main body, which may have a positive temperature coefficient. The main body may have PTC thermistor components, a core, and ceramics components at least in the core. The PTC thermistor components may have a positive temperature coefficient, and the ceramics components may have a thermal conductivity of at least 2.5 W/mK. The ceramics components may be disposed in a distributed manner.
    Type: Application
    Filed: April 8, 2019
    Publication date: October 10, 2019
    Inventors: Michael Kohl, Eric Marlier, Stefan Paetzold, David Rollet, Falk Viehrig, Denis Wiedmann
  • Publication number: 20190311823
    Abstract: A PTC thermistor module may include at least two PTC thermistor elements. The at least two PTC thermistor elements may be spaced apart from one another by separation sections. The at least two PTC thermistor elements may include two electric lines, spaced apart from one another, for the electrical supply of the PTC thermistor elements. An increased efficiency and operational reliability of the PTC thermistor module are achieved with an electrically insulating receiving body, in which the PTC thermistor elements are received, and which encompasses the PTC thermistor elements in a circumferential direction. A method for producing such a PTC thermistor module and a temperature control device may utilize at least one such PTC thermistor module.
    Type: Application
    Filed: April 8, 2019
    Publication date: October 10, 2019
    Inventors: Konrad Dubil, Michael Kohl, Falk Viehrig
  • Patent number: 10322617
    Abstract: A system for a motor vehicle for heating and/or cooling a battery and a motor vehicle interior is provided that includes a first coolant circuit thermally coupled to the battery, a second coolant circuit for heating the motor vehicle interior having an air heat exchanger for outputting heat from the second coolant circuit to the air of the interior of the motor vehicle, and a heating unit for heating the second coolant circuit. The first coolant circuit and the second coolant circuit are thermally coupled to each other for heating the battery using heat from the second coolant circuit and/or for cooling the air of the motor vehicle interior, in that heat from the second coolant circuit can be fed to the first coolant circuit by the circuit heat exchanger or the mixing valve.
    Type: Grant
    Filed: March 26, 2012
    Date of Patent: June 18, 2019
    Assignee: MAHLE International GmbH
    Inventors: Michael Kohl, Karl Lochmahr, Thomas Strauss
  • Publication number: 20190166653
    Abstract: A positive temperature coefficient (PTC) heater may include a housing and at least one PTC heating element arranged within the housing. The at least one PTC heating element may include a heating layer of a PTC material arranged between two electrode plates of the at least one PTC heating element and electrically contacted therewith. The two electrode plates may be fixed to the housing such that heat is transferable and and the two electrode plates are electrically insulated from the housing. At least one electrically insulated heat conducting layer may be arranged to divide the heating layer into a divided heating layer and may be fixed to the divided heating layer to transfer heat.
    Type: Application
    Filed: November 26, 2018
    Publication date: May 30, 2019
    Inventors: Michael Kohl, Eric Marlier, Stefan Paetzold, David Rollet, Falk Viehrig, Denis Wiedmann
  • Patent number: 10302331
    Abstract: A heating device is provided with plates stacked one on top of another. At least one first fluid channel is formed in a fluid-tight manner between a first plate package with a first and a second plate. An electrical heating element is arranged between a first plate of the first plate package and an additional plate. The electrical heating element is accommodated between the two plates in a sealed manner and is electrically insulated, wherein an inlet-side and an outlet side fluid connection of the first fluid channel is arranged on the second plate of the first plate package. The electrical heating element has a connection device for electrical contacting, which is connected to the electrical heating element and protrudes through a window in the second plate of the first plate package, wherein the fluid connections and the window are arranged adjacent to opposing lateral edges of the second plate.
    Type: Grant
    Filed: January 26, 2015
    Date of Patent: May 28, 2019
    Assignees: MAHLE International GmbH, Behr-Hella Thermocontrol GmbH
    Inventors: Michael Kohl, Karl-Gerd Krumbach, Karl Lochmahr, Wolfgang Seewald, Olivier Schunck, Dirk Nagel, Lars Heeper, Matthias Stallein, Michael Steinkamp, Karsten Marquas, Volker Dicke
  • Publication number: 20180328622
    Abstract: An electrical heating element, in particular for a heating or air-conditioning system of a motor vehicle, having a heating block, which includes a plurality of electrical heating elements having heaters and having contacts, which electrically contact the heaters, the heating block including a plurality of radiator elements, which are thermally connected to the heaters for the purpose of transferring heat from the heaters to a medium flowing against the radiator elements, the heaters having two diametrically opposed, wide side surfaces and two diametrically opposed, narrow side surfaces. The contacts electrically contact the heaters on the diametrically opposed narrow side surfaces, or the contacts electrically contact the heaters on the diametrically opposed, wide side surfaces in diagonally opposite areas, viewed laterally, which are each adjacent to one of the diametrically opposed, narrow side surfaces.
    Type: Application
    Filed: May 9, 2018
    Publication date: November 15, 2018
    Applicant: MAHLE International GmbH
    Inventors: Falk VIEHRIG, Michael KOHL, Wolfgang SEEWALD, Konrad DUBIL
  • Publication number: 20180319252
    Abstract: An electrical heating device (1) includes a housing (2, 102) having a fluid inlet (3) for the intake of a fluid to be heated into the housing (2, 102) and having a fluid outlet (4) for the discharge of the fluid from the housing (2, 102). A flow channel (5) for the fluid is formed between the fluid inlet (3) and fluid outlet (4), and at least one heating instrument (6, 105, 205) extends into the flow channel (5) in the housing (2, 102). This heating instrument has a sleeve (7, 207) that surrounds an interior of the heating instrument (6, 105, 205) in a fluid-tight way. At least one heating element (8, 208) is arranged in the sleeve (7, 207), and at least one sensor element (9, 109, 209) is arranged in the sleeve (7, 207) for monitoring the temperature of the at least one heating element (8, 208).
    Type: Application
    Filed: May 4, 2018
    Publication date: November 8, 2018
    Inventors: Michael KOHL, Karl-Gerd KRUMBACH, Wolfgang SEEWALD, Igor TSCHEMERIS, Christoph FODOR, Andreas SCHLIPF