Abstract: A method manages a hybrid powertrain of a hydrogen motor vehicle. The hybrid powertrain includes an internal combustion engine, a fuel cell, a hydrogen storage tank, and a line connecting an air outlet of the fuel cell to an air inlet of the internal combustion engine. The line has a cutoff valve. The method includes controlling the shutdown of the fuel cell, stopping the internal combustion engine, opening the cutoff valve when the fuel cell and the internal combustion engine are stopped, and running the internal combustion engine without injecting hydrogen from the storage tank in order to draw, via the line, the fluids present in the fuel cell to the internal combustion engine.

Abstract: A powertrain that operates with hydrogen includes a hydrogen tank, an internal combustion engine supplied with hydrogen by the hydrogen tank, and an electric motor operating from a fuel cell supplied with hydrogen from this hydrogen tank. The powertrain includes an air-circulation connection circuit provided with an opening/closing device and connecting an air outlet of the fuel cell to an air inlet of the internal combustion engine to allow oxygen-depleted air from the fuel cell to supply the internal combustion engine.

Abstract: An electric power supply device includes-a first energy source having at least one battery and a second energy source having at least one fuel cell. The first and second energy sources supply energy to an electric motor of a motor vehicle in different proportions. A control module of the electric power supply device includes a memory that stores a value of a maximum operating power able to be supplied by the second energy source so that the second energy source is not asked to supply an amount greater than the stored maximum operating power. The maximum operating power value of the second energy source is dependent on a cooling capacity for the second energy source.

Abstract: An electrical power supply for a hybrid or electric motor vehicle includes a first power source to supply a voltage network of the vehicle, a second power source to supply the voltage network of the vehicle and/or to recharge the first power source, and a control module to control a safety structure of the first power source and of the second power source. The electrical power supply includes a metal casing containing the first power source, the second power source, the control module and the safety structure. The safety structure is common to the two power sources.

Abstract: A method discharges the electrical circuit of a vehicle including at least one traction electric machine and equipped with an electrical supply network including a high-voltage battery and a hydrogen-fuel-cell stack that is associated with a voltage converter, with a high-voltage consumption network including the machine associated with an inverter and appended pieces of equipment, and with a drive module. The discharging method includes the following successive steps: stopping the vehicle, electrically disconnecting the battery from the network, interrupting the supply of hydrogen to the stack, and discharging energy from the electrical circuit into the stator winding of the machine by driving the voltage converter via the drive module.

Abstract: An electrical power supply for a hybrid or electric motor vehicle includes a first power source to supply a voltage network of the vehicle, a second power source to supply the voltage network of the vehicle and/or to recharge the first power source, and a control module to control a safety structure of the first power source and of the second power source. The electrical power supply includes a metal casing containing the first power source, the second power source, the control module and the safety structure. The safety structure is common to the two power sources.

Abstract: A device for electrically powering an electric motor of a motor vehicle includes first energy source, a second energy source, and a memory module in which is stored a value of a maximum operating power that can be provided by the second energy source. This maximum operating power value is a function of the cooling capacity of the second energy source.

Abstract: A method for heating fuel upon start-up of a hybrid vehicle combustion engine, in which method temperature of fuel and temperature outside the vehicle are compared against a first threshold below which starting of the vehicle is forbidden, and against a second threshold higher than the first threshold and above which the engine will start without the fuel being heated. The fuel is heated by exchange of heat with a cooling circuit for the vehicle battery when the external temperature is between the two thresholds.

Abstract: A method for heating fuel upon start-up of a hybrid vehicle combustion engine, in which method temperature of fuel and temperature outside the vehicle are compared against a first threshold below which starting of the vehicle is forbidden, and against a second threshold higher than the first threshold and above which the engine will start without the fuel being heated. The fuel is heated by exchange of heat with a cooling circuit for the vehicle battery when the external temperature is between the two thresholds.

Abstract: A power production unit onboard a motor vehicle, including a fuel cell including at least one orifice for evacuating off-gases, in particular of air and water vapor, which are discharged into a discharge pipe. A condenser liquefies the water vapor, and a compressor is interposed upstream of the condenser, liquid water being diverted from the discharge pipe to a liquid water circuit. The compressor compresses the off-gases so that the dew point of the water vapor is higher than the temperature of the condenser.

Abstract: The invention concerns a power production unit (10) onboard a motor vehicle, comprising a fuel cell (12) including at least one orifice for evacuating off-gases (28) consisting in particular of air and water vapour, and which are discharged into a discharge pipe (30, 36) wherein is provided a condenser (28) which liquefies the water vapour, and wherein a compressor (32) is interposed upstream of the condenser (38), liquid water being diverted from the discharge pipe (36) to a liquid water circuit (62). The invention is characterized in that the compressor (32) compresses the off-gases so that the dew point of the water vapour is higher than the temperature of the condenser (38).