The present invention relates to a composite charging system and method capable of producing charging power for an electric vehicle by utilizing hydrogen energy supplied to a hydrogen vehicle, and compositely connecting hydrogen energy with a power system to efficiently perform charging of the electric vehicle, and more flexibly coping with the use of energy.

The composite charging system according to the present invention comprises: a hydrogen charger which charges hydrogen into a vehicle; a hydrogen power supply system which generates and supplies power on the basis of hydrogen; a system power supply system which supplies power from a power system; an electric charger which charges the electric vehicle; and a battery power supply system which stores power supplied from the hydrogen power supply system and the system power supply system, and supplies the stored power to the electric charger.

An electric power supply system includes: a hydrogen production device producing hydrogen using electric power supplied from a natural-energy power generator; a hydrogen storage device storing the produced hydrogen; a fuel cell system generating electricity using the stored hydrogen to supply the generated electric power to a load; an electric power accumulator accumulating electric power supplied from the natural-energy power generator, to supply the accumulated power to the load; and a control device controls supply of electric power from the fuel cell system and the electric power accumulator to the load. The control device executes a first control for supplying electric power to the load from each of the electric power accumulator and the fuel cell system in a time zone in which demanded power of the load is smaller than electric power dischargeable from the electric power accumulator.

Energy generation systems and methods are disclosed. An energy generation system includes a fuel tank configured to store a fuel in liquid form and a power generating device including a fuel cell or an internal combustion engine configured to receive the fuel and generate electrical energy with the fuel. The energy generation system also includes an expander connected between the fuel tank and the power generating device, the expander configured to receive the fuel as a gas and a generator connected to the expander so as to generate electrical energy when fuel passes through the expander.

A fuel cell system includes a drain valve for a gas-liquid separator in a fuel off-gas flow path to discharge liquid water in the gas-liquid separator, a pressure sensor disposed at a fuel gas supply flow path or the fuel off-gas flow path to detect a gas pressure in the flow path, a power generation state acquisition unit to acquire a power generation state of a fuel cell stack, and a control device. The control device controls the opening and closing of the drain valve based on the power generation state and the gas pressure.

A redox flow battery system includes a cell that performs charging and discharging between the cell and a power system, a tank that stores an electrolyte supplied to the cell, a circulation pump that circulates the electrolyte between the cell and the tank, a power converter disposed between the cell and the power system, and a charge/discharge control unit that controls an operation of the power converter to control charging and discharging of the cell. When the charge/discharge control unit detects power failure in the power system, the charge/discharge control unit controls the power converter such that power of the electrolyte remaining in the cell is supplied to the circulation pump.

An energy management system for an aircraft, wherein the energy management system comprises a fuel cell configured to convert chemical energy into electric energy, at least one energy source configured to provide electric energy, at least one electrical load, an electric bus electrically coupled to the fuel cell, the at least one energy source, and the at least one electrical load, and a controller configured to control the at least one electrical load in such a manner that a minimum load to the fuel cell is ensured. Furthermore, an aircraft comprises such energy management system. A method for managing energy in a system comprises electrically coupling a fuel cell, at least one energy source, and at least one electrical load by an electric bus, and controlling at least one electrical load in such a manner that a minimum load to the fuel cell is ensured.

An electric power supply device supplies electric power to a work machine having an electric power source. The electric power supply device includes a fuel cell different from the electric power source and an electric power connecting section for transferring electric power between the electric power source and the electric power supply device. A control device for controlling the electric power supply device includes a rated capability obtaining section for obtaining the information indicating the rated value of the charge and discharge capability of the electric power source of the work machine in response to the electric power supply device being mounted in the work machine or the electric power supply device being able to utilize the electric power of the electric power source, and an operating condition determining section for determining the operating condition of the electric power supply device based on the rated value.

A hydrogen-energy control system according to the present embodiment includes a hydrogen energy system, a power grid control system, a hydrogen transport system, and a hydrogen-energy integrated management system configured to control the hydrogen energy system based on information on communication with the power grid control system, wherein the hydrogen-energy integrated management system includes a first communication portion configured to perform communication of at least data of a charge request in charge and discharge requests with the power grid control system, a second communication portion configured to perform communication of hydrogen demand data with the hydrogen transport system, a target hydrogen-amount acquisition portion configured to acquire a target hydrogen-production amount based on the hydrogen demand data, and an operation planning portion configured to create an operation plan in the hydrogen energy system based on the target hydrogen-production amount and the data of the charge request.

A green smart factory energy management system for carbon reduction, includes: an eco-friendly power generator installed on one side of a building to generate first electrical energy through wind power or sunlight; a water electrolysis device for receiving surplus power of the first electrical energy remaining after operating a building, and electrolyzing water to generate hydrogen; a hydrogen storage device for storing some of the hydrogen generated by the water electrolysis device; a hydrogen fuel cell for generating second electrical energy by using some of the hydrogen generated by the water electrolysis device; a machine tool provided with an electrically driven spindle system to grip or rotate a workpiece when the second electrical energy is applied; and a distributed power management device for controlling an amount of power consumed.

A fuel cell system (200), wherein the fuel cell system (200) has: a) a fuel cell stack (10), b) an anode gas path (20) which fluidically communicates with the fuel cell stack (10) and which serves for supplying anode gas from an anode gas store (22) to the fuel cell stack (10), c) a cathode gas path (30) which fluidically communicates with the fuel cell stack (10) and which serves for supplying cathode gas from a cathode gas store (32) to the fuel cell stack (10), d) a cooling fluid path (40) which fluidically communicates with the fuel cell stack (10) and which serves for supplying cooling fluid from a cooling fluid store (42) to the fuel cell stack (10), e) a vibration generator (60) which is in data-transmitting communication with a control unit (50) and which serves for setting the fuel cell stack (10) into a vibrating state, and f) the control unit (50) for actuating the vibration generator (60) in order to set the fuel cell stack (10) into the vibrating state by means of the vibration generator (60).