The power supply system includes: a fuel cell, capable of generating power; a power storage device, storing power generated by the fuel cell; and a control device, controlling at least the fuel cell. The control device, under a tendency that power consumption of a load at least connected with the fuel cell and the power storage device decreases, determines a first lower limit power based on power generated by the fuel cell before a predetermined time, causes the fuel cell to generate second power equal to or greater than the first lower limit power when first power generated by the fuel cell determined based on a power supplied to the load drops below the first lower limit power, and determines the first lower limit power with a tendency that the greater the generated power, the greater a difference between the generated power and the first lower limit power is increased.

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.

An information processing device includes an acquisition unit which acquires use history information indicating a use history of a vehicle, a prediction unit which predicts an output decrease amount of a fuel cell in a vehicle based on the use history information acquired by the acquisition unit and output decrease characteristic information indicating an output decrease characteristic of the fuel cell according to the use history, and a control unit which executes predetermined control based on the output decrease amount predicted by the prediction unit. When the control unit determines that a rated output of the fuel cell is equal to or smaller than a threshold value based on the output decrease amount, the control unit executes adhering substance removal control in which nitrogen-enriched gas having a higher nitrogen concentration and a lower oxygen concentration than air is supplied to the fuel cell as cathode gas.

A redox flow battery includes a tank configured to store an electrolyte and a distribution mechanism to distribute the electrolyte to a battery cell. The tank has a partition portion partitioning a space inside the tank into a first space and a second space, the distribution mechanism has a distribution passage through which the electrolyte is distributed between the first space and the second space via the battery cell, and the partition portion is composed of a flexible material.

An energy management system for a vehicle comprising a fuel cell system having at least one fuel cell with an anode side and a cathode side, an air inlet conduit connected to an inlet end of the cathode side for supplying air to the cathode side of the at least one fuel cell, and further having an air compressor arrangement disposed in the air inlet conduit and in fluid communication with the cathode side; wherein the energy management system further comprises an air-cooled brake resistor in fluid communication with the air compressor arrangement, and a control system in communication with the air compressor arrangement and with a controllable valve assembly arranged and configured to control supply of compressed air from the air compressor arrangement to any one of the at least one fuel cell and the air-cooled brake resistor via a first fluid conduit and a second fluid conduit, respectively.

A control device switches between a first injection control of injecting the fuel gas by sequentially providing periods during which at least one of the plurality of injectors injects the fuel gas if it is determined that the power generation state of the fuel cell stack is stable based on a detected power generation state, and a second injection control of injecting the fuel gas by intermittently providing periods during which the plurality of injectors simultaneously inject the fuel gas if it is determined that the power generation state of the fuel cell stack is not stable based on the detected power generation state.

Methods and systems are provided for iron preformation in a redox flow battery. In one example, a method may include, in a first condition, discharging and then charging the redox flow battery, and in a second condition, charging the redox flow battery including preforming iron metal at a negative electrode of the redox flow battery, and thereafter entering an idle mode of the redox flow battery including adjusting one or more electrolyte conditions. In some examples, each of preforming the iron metal and adjusting the one or more electrolyte conditions may increase a battery charge capacity to greater than a threshold battery charge capacity.

Disclosed are a fuel cell power net system and a method for controlling the same. The fuel cell power net system includes: a fuel cell controller configured to control current output from a fuel cell unit; at least one DC/DC converter configured to boost DC voltage and to output the boosted DC voltage; a battery connected to the fuel cell unit in parallel so as to supply DC power to the fuel cell unit; a load controller configured to provide demand output information; and a fuel cell power controller configured to receive the demand output information, to calculate output levels required by the fuel cell unit and the battery, to compare a current output level of the fuel cell unit with the output level required by the fuel cell unit, and to provide a control value to the fuel cell controller depending on a result of the comparison.

Methods and systems are provided for iron preformation in a redox flow battery. In one example, a method may include, in a first condition, discharging and then charging the redox flow battery, and in a second condition, charging the redox flow battery including preforming iron metal at a negative electrode of the redox flow battery, and thereafter entering an idle mode of the redox flow battery including adjusting one or more electrolyte conditions. In some examples, each of preforming the iron metal and adjusting the one or more electrolyte conditions may increase a battery charge capacity to greater than a threshold battery charge capacity.

Systems and methods are provided for capturing gas byproducts of a fuel cell system, such as nitrogen. Instead of dispelling the gas byproducts, a byproduct management system can engage in selective isolation, compression, and storage of the gas byproducts in various storage tanks. The compression and storage of the gas byproducts can be effectuated using excess energy, e.g., regenerative energy.