Gm Global Technolgoy Operations, Inc.

Robert Boschgmbh

Thorsten Rohwer

Rainer Pechtold

Jochen Wessner

Ingo Hermann

Andreas Herzberger

Christian Koenig

Denis Kern

Dieter Kaimann

Robert Schaefer

Paul Esse

Thorsten Kels

Douglas-Brent Hackett

Christian Buehnert

Jens Koerkemeyer

The invention relates to an electric motor, in particular for a motor vehicle, comprising a housing (), a shaft () having an axle (), a stator and a rotor, at least one channel () for conducting a coolant for cooling the electric motor (), wherein the geometry of the alignment of at least one section () of the at least one channel () is designed such that the coolant flows in the direction of the axle () of the shaft () through the at least one channel (), having a deviation of less than 40&#xb0;.

Electrical machine comprising cooling channels

A fuel cell stack includes a plurality of adjacently stacked fuel cell modules each of which includes a plurality of adjacently aligned fuel cells that are connected in electrical series. The current flow between adjacent fuel cells is achieved across diffusion media of said adjacent fuel cells. First and second reactant channels are formed in the reactant carrier plates for separately delivering two different reactants along each reactant carrier plate.

Fuel cell stack having reactant carrier plates delivering both anode and cathode reactants

A product comprising a phase transfer valve, and wherein said phase transfer valve comprises an actuating valve housing having a housing interior; a liquid hydrogen inlet, a gaseous hydrogen inlet and a hydrogen outlet provided in said valve housing; an actuating valve slidably mounted in said housing interior; and wherein said actuating valve is moveable between a first position for sealing said gaseous hydrogen inlet from said hydrogen outlet and a second position for sealing said liquid hydrogen inlet from said hydrogen outlet.

Multiple phase transfer valve for liquid hydrogen tank

A fuel cell stack includes a plurality of adjacently stacked fuel cell modules each of which includes a plurality of adjacently aligned fuel cells that are connected in electrical series. The current flow between adjacent fuel cells is achieved across diffusion media of said adjacent fuel cells.

Fuel cell stack having current flow across diffusion media

A compressed gas storage system with an incorporated pressure relief device is disclosed. The compressed gas storage system comprises a tank for storing a compressed gas, a battery in the direct surroundings of the tank, and a relief valve in communication with the tank. The relief valve is configured to be responsive to electrical current generated by the battery. The battery is configured to define an electrically active state when it reaches a temperature above a maximum safe operating temperature of the compressed gas storage system. The electrically active state of the battery is characterized by the generation of sufficient electrical current to open the relief valve which permits gas to escape from the tank. In another embodiment, a thermocouple in combination with a conducting metal may be substituted for the battery.

Passive pressure relief device system based on thermobattery for a compressed gas storage tank

A tank for storing a compressed gas, such as hydrogen, that includes a connection assembly to increase seal integrity. The tank includes an inner gas tight liner and an outer support layer that provides the structural integrity. The connection assembly includes a boss positioned within an opening of the support layer. The inner liner includes a neck portion extending through an internal bore of the boss having an outer collar or flange at an outside surface of the boss. A tank valve is bolted to the boss at an outer perimeter of the collar where a portion of the tank valve extends through the neck portion of the liner and into the tank.

Hydrogen pressure tank including an inner liner with an outer annular flange

A fuel cell system utilizes at least one flow restricting device to vary the stoichiometric quantity of cathode reactant flowing to two discrete cathode sides of the fuel cell system. The varying of the stoichiometric quantity of cathode reactant can be between two predetermined values. The varying of the stoichiometric quantity can be during a steady state power demand placed on the system and/or during transients in a power demand placed on the system. The airmover that supplies the cathode reactant stream can be operated in a substantially continuous manner during a continuous power demand placed on the fuel cell system.

Dynamic cathode gas control for a fuel cell system

A heated O-ring that has particular application for providing sealing in the connector region of a compressed hydrogen storage tank in a fuel cell system. In one embodiment, an electrical heating wire is wound through the O-ring so that resistive heating is provide by applying an electrical potential to the wire so that the temperature of the O-ring does not decrease below a predetermined temperature. In another embodiment, electrical heating elements are provided adjacent to and in contact with the O-ring, where an electrical potential applied to the heating elements causes the heating elements to maintain the temperature of the O-ring.

Heated O-ring

A magnetic multi-layer insulation system for a cryogenic storage tank. The system includes multiple layers of insulation comprising a carrier support structure disposed between a first major surface of a magnetic material defining a north pole facing away from the carrier support structure, and a second and opposite major surface of a magnetic material defining a south pole facing away from the carrier support structure. A reflective surface, or metal foil, is disposed adjacent the magnetic poles to deflect radiation. The layers are repelled from one another without the use of spacers. In various embodiments, the magnetic material is a permanent magnet selected from the group consisting of Samarium-Cobalt, Alnico, Neodymium-Iron-Boron, an alloy of the Lanthanide group of elements, and mixtures and alloys thereof.

Insulation for cryogenic tanks

A fuel cell with a gas diffusion media having a hydrophobic layer adjacent a flow field plate and a hydrophilic layer adjacent the membrane electrode assembly of the fuel cell. The two layers enable balanced humidification of reactant gas along with a basis for managing capillary water addition into the gas diffusion media. The combination of balanced moisture flux (via the hydrophobic layer) and the retention of water (via the hydrophilic layer) for humidifying reactant gas sustains hydration of the proton exchange membrane while preserving the catalyst at full activity.

Growing community of inventors

Trebur, Germany

Thorsten Rohwer