A method and a system for optimizing a lifetime of a fuel cell system based on adjustment and constraint of a thermoelectric ratio are provided. The method includes obtaining initial reference voltages of a plurality of single-machine fuel cell systems, and performing a durability test under a normal operating condition to obtain variation relationships of reference voltage over time; monitoring an operating voltage of each of the single-machine fuel cell systems in real-time under the normal operating condition to obtain a real-time monitored voltage and a real-time voltage deviation; calculating a performance expected attenuation profile of each of the single-machine fuel cell systems under the normal operating condition; obtaining current density distribution and actual available heat of each of the single-machine fuel cell systems, and calculating a health state boundary of each of the single-machine fuel cell systems in stable operation, so as to optimize operating modes of the systems.

Disclosed is a method and a device configured to control deterioration avoidance operation of a fuel cell system. In one aspect, the method may include starting the deterioration avoidance operation when an operation of a fuel cell is restarted in a state where an energy storage device is operating, and the fuel cell is stopped; controlling anode hydrogen pressure based on a predetermined condition, the condition indicating that the anode hydrogen pressure needs to be increased; determining hydrogen recirculation and supplying hydrogen including a process to determine whether to recirculate hydrogen based on a predetermined condition, the condition indicating that hydrogen needs to be recirculated, before supplying hydrogen; determining air recirculation and supplying air including a process to determine whether to recirculate air based on a predetermined condition, the condition indicating that air needs to be recirculated, before supplying air; and terminating the deterioration avoidance operation and starting operation of the fuel cell.

An environmental control system assembly for an aircraft is provided. The assembly includes: an environmental control system; a fuel cell assembly in electrical communication with the environmental control system for providing electrical power to the environmental control system; and a controller operably connected to the fuel cell assembly, the controller operable to modulate an amount of power generated by the fuel cell assembly and provided to the environmental control system based on load forecasting data from an ECS load forecasting module of the controller.

When executing a depressurizing process of a hydrogen compression device and a water electrolysis device, on-off valves that supply a hydrogen gas or an oxygen gas to a fuel cell are placed in an opened state, and further, a set pressure of supply pressure reducing valves are adjusted to a value that is lower than a set pressure of bypass pressure reducing valves. Gas remaining in gas depressurizing regions is supplied, via the bypass pressure reducing valves, to the fuel cell.

Disclosed is a fuel cell system and a method for controlling the same which in a constant current operation mode in which an output current of a fuel cell stack is constant, controls a hydrogen supply unit, an air supply unit, or a hydrogen recirculation unit differently depending on the size of a target output current to prevent the local flooding of the fuel cell stack in the constant current operation mode.

A battery control system and method of a fuel cell vehicle includes a battery, a fuel cell, and a controller. The battery provides driving energy of a vehicle. The fuel cell provides the driving energy of the vehicle or charging the battery. The controller estimates a degree of deterioration of the fuel cell, derive a change rate in an SOC value of the battery based on the degree of deterioration of the fuel cell, and change a charge control factor or a discharge control factor of the battery according to the derived change rate in the SOC value of the battery.

The present disclosure generally relates to systems and methods for using an energy storage device to assist a venturi or an ejector in a fuel cell or fuel stack system.

Some embodiments of the disclosures provide an anode recovery system of a fuel cell. The anode recovery system includes a gas supply unit connected to a power generation unit, a gas-liquid separator connected to the power generation unit and a first anode gas recovery control component; and a storage tank connected to the gas-liquid separator and a cathode recovery system. The gas supply unit is configured to provide anode gas to the power generation unit. A first part of unreacted anode gas from the power generation unit mixes with the anode gas and flows back to the power generation unit sequentially via the gas-liquid separator and the first anode gas recovery control component. A second part of the unreacted anode gas and generated water are discharged from the power generation unit to the storage tank and is further discharged to the cathode recovery system.

A medical device includes a holder that may be applied to the skin of a patient, a biofuel cell, a pump configured for supplying blood to the biofuel cell, a sensor configured to emit a signal representative of a blood parameter, a control unit connected to the pump and the sensor, and a rechargeable battery electrically connected to the biofuel cell. The control unit is configured to perform a recharging procedure including the following steps: processing the signal emitted by the sensor, estimating a value of the blood parameter of the patient, comparing said estimated value with a threshold value, and, based on the comparison, commanding the activation of the pump for delivering a predetermined amount of blood to the biofuel cell for generation electricity and recharging the battery.

A method of monitoring and replacing fuel cells within a fuel cell stack assembly. The method includes measuring one or more operating conditions of a fuel cell within the fuel cell stack assembly. The method includes determining, using a processor, a state of health of the fuel cell based at least in part on the one or more operating conditions. The method includes detaching the fuel cell from an adjacent cell within the fuel cell stack assembly by removing a first electrically-conducing mating matrix associated with a first endplate of the fuel cell from a second electrically-conducing mating matrix associated with a second endplate of the adjacent cell. The method includes attaching a replacement fuel cell by mating a third electrically-conducing mating matrix associated with a third endplate of the replacement fuel cell with a fourth electrically-conducing mating matrix associated with a fourth endplate of the adjacent cell.