A drive system of an aircraft, including a fuel cell, which can be supplied with hydrogen from a hydrogen tank and with air from a blower, the fuel cell being configured to provide drive power for operational flight after takeoff and before landing dependent on a hydrogen mass flow supplied by the hydrogen tank and dependent on an air mass flow supplied by the blower, and an electrical energy store, which is configured to provide additional drive power for takeoff and landing, wherein an additional hydrogen tank and an air or oxygen tank are configured to interact with the fuel cell such that the fuel cell can be supplied with an additional hydrogen mass flow and with an additional air or oxygen mass flow, thereby compensating at least partially for a loss of the additional drive power provided by the electrical energy store for landing.

The present invention provides, in a first aspect, an electrical generation system which includes an electrolyzer and a fuel cell system. The electrolyzer is coupled to a source of water and a power source. The electrolyzer is configured to generate oxygen and hydrogen utilizing water from the water source and electrical power from the power source. The fuel cell system is coupled to the electrolyzer to receive a flow of the hydrogen from the electrolyzer at an anode thereof. The fuel cell system includes a cathode having a cathode chamber coupled to a source of ambient air. The cathode chamber is coupled to the electrolyzer to selectively allow a flow of the oxygen from the electrolyzer to the cathode chamber and to selectively allow a flow of air from the source of ambient air to the cathode chamber. The fuel cell system is configured to generate electricity in a fuel cell reaction utilizing the hydrogen and the oxygen.

An electrolysis apparatus for the electrolytic production of oxygen from oxide-containing starting material includes at least one cathode which at least partly delimits a receiving region which in at least one operation state is configured for receiving the oxide-containing starting material and at least one anode, wherein the electrolysis apparatus has at least one selective oxygen pump which is at least partly realized integrally with the anode.

Described herein is a modular system for producing hydrogen or other gases in a densely-packed space, such as an urban setting. The system includes a plurality of hydrogen cabinets installed in a stacked fashion and at least one duct assembly to safely exhaust gases produced by the system.

A hydrogen storage assembly includes an enclosure substantially encompassing an electrolyzer, a hydrogen storage system, a hydrogen fuel cell, an electrochemical energy storage module, a power conversion system, and a control system. The electrolyzer is configured to separate, via electrolysis, water into hydrogen gas that is stored in the hydrogen storage system; the hydrogen fuel cell is configured to convert the stored hydrogen gas into electrical energy and water. The electrochemical energy storage module is configured to function as an energy buffer; the power conversion system is configured to convert the produced electrical energy to a desired form. The control system is configured to to control the storage and distribution of the stored hydrogen and electrical energy in an optimized manner to achieve predefined financial and energy-use objectives.

A DC voltage distribution arrangement and method of controlling a DC voltage distribution system, the DC voltage distribution system including a DC voltage bus, a fuel cell electrically connected to the DC voltage bus, an energy storage and an energy storage converter, wherein the input of the energy storage converter is connected to the energy storage and the output of the energy storage converter is connected to the DC bus. The method comprises providing a DC voltage reference for the energy storage converter, the energy storage converter controlling the voltage of the DC voltage bus by providing power from the energy storage or to the energy storage, detecting power flow of the energy storage converter, and changing the DC voltage reference on the basis of the detected power flow to change the power taken from the fuel cell.

An electrical system, and, more particularly, to an electrical system for an aircraft comprising one or more energy sinks and a hybrid energy storage system. The hybrid energy storage system may comprise one or more primary energy sources, a secondary energy source, and a secondary energy source control unit. The one or more primary energy sources may be coupled to and supply power to the one or more energy sinks. The secondary energy source may be coupled to the one or more primary energy sources and adapted to supply power at a variable output voltage to the one or more primary energy sources.

A method of protecting a supercapacitor module of a vehicle contains steps of: A) installing; B) judging; C) executing a protection mode; and D) executing an operating mode. In the step A), an open circuit remains between the rechargeable battery and the supercapacitor module, and a voltage value of the supercapacitor module is 0. In the step B) the supercapacitor module is judged whether being satisfied with a protection condition, an external voltage is V1, a fully charging voltage of the supercapacitor module is V2, an ambient temperature value of the supercapacitor module is T1, and a safe temperature value of a respective supercapacitor is T2. In the step C), when the supercapacitor module is satisfied with the protection condition, the protection mode is executed. In the step D), when a connection circuit between the supercapacitor module and the rechargeable battery occurs, the supercapacitor module is rechargeable and dischargeable electrically.

A device for converting biomass into a redox mediator in reduced form, including an assembly of microbial fuel cells including a first compartment including an anode and fermentative microorganisms and electroactive microorganisms, and a second compartment including a cathode and a solution including the mediator, and an external resistor connecting the cathode and the anode. The value of the external resistance of at least one microbial fuel cell is distinct from that of at least one other microbial fuel cell. The device thus makes it possible to induce segregation of fermentative microorganisms and electroactive microorganisms along the assembly.

A method for increasing safety in the surroundings of an electric vehicle having a fuel cell system and batteries, wherein the vehicle is configured for charging the batteries by power from the fuel cell system and e.g. produces CO2 during this operation, even when the vehicle is turned-off and in a parked situation, wherein the method includes the steps of providing a sensor system having a gas intake and configured for warning against elevated CO2 levels in the surroundings of the vehicle, mounting the sensor system on the vehicle with the gas intake outside the vehicle's cabin, providing an alarm when the sensor system evaluates that the CO2 levels in the surroundings of the vehicle are elevated and surpass a predetermined threshold level.