A membrane humidifier for a fuel cell is disclosed. The membrane includes a middle case in which a plurality of hollow fiber membranes are accommodated; a cap case coupled to the middle case; a potting part formed at the end portions of the plurality of hollow fiber membranes; and an assembling member disposed between the end portions of the cap case and the middle case, and simultaneously coupling, so as to be airtight, a gap between the cap case and the middle case and a gap between the cap case and the potting part.

A drying method of a fuel cell includes holding the fuel cell having separator plates exposed on the surface of the fuel cell at a predetermined angle, and blowing air to the fuel cell at an angle in a range of 5° or larger and 85° or smaller with respect to the surface of the separator plate of the fuel cell held at the predetermined angle.

The control device is provided with a power generation part configured to be able to selectively perform normal power generation and low efficiency power generation in which the power generation loss is greater compared with normal power generation when there is a request for warmup of the fuel cell. The power generation part temporarily stops the low efficiency power generation and performs normal power generation when during performance of the low efficiency power generation the target generated electric power of the fuel cell becomes equal to or greater than a predetermined first switching electric power.

A fuel cell system wherein the fuel cell comprises an electrolyte membrane; wherein the electrolyte membrane is a perfluorosulfonic acid (PFSA) membrane; wherein the controller has a data group showing a correlation between the current of the fuel cell and the temperature of the fuel cell which is necessary to keep a moisture content of the electrolyte membrane at a predetermined moisture content threshold or more; and wherein, when the temperature and voltage of the fuel cell become a predetermined first temperature threshold or more and a predetermined voltage threshold or more, respectively, the controller conducts a temperature dropping time power generation mode in which power generation is conducted while controlling the current of the fuel cell with reference to the data group, until the temperature of the fuel cell becomes a predetermined second temperature threshold which is lower than the first temperature threshold.

A linear time varying model predictive control (LTV-MPC) framework is developed for degradation-conscious control of automotive polymer electrolyte membrane (PEM) fuel cell systems. A reduced-order nonlinear model of the entire system is derived first. This nonlinear model is then successively linearized about the current operating point to obtain a linear model. The linear model is utilized to formulate the control problem using a rate-based MPC formulation. The controller objective is to ensure offset-free tracking of the power demand, while maximizing the overall system efficiency and enhancing its durability. To this end, the fuel consumption and the power loss due to auxiliary equipment are minimized. Moreover, the internal states of the fuel cell stack are constrained to avoid harmful conditions that are known stressors of the fuel cell components.

The disclosure provides a fuel cell-based control method, a control device and a well-site stimulation method are provided. The control device includes: selecting at least one from a plurality of first fuel cells to form a fuel cell stack, and distributing gas for the fuel cell stack. Each first fuel cell forming the fuel cell stack is a second fuel cell, and distributing gas for the fuel cell stack includes: distributing gas with a first gas usage amount to the fuel cell stack; and distributing the gas with the first gas usage amount according to a cell gas distribution ratio so as to provide gas with a corresponding second gas usage amount to each second fuel cell respectively.

A temperature control apparatus and method for fuel cell system, where the apparatus includes a fuel cell stack, a first pump disposed on a first cooling line, a first radiator disposed on the first cooling line, power electronic parts, a second pump disposed on a second cooling line, a second radiator disposed on the second cooling line, a cooling fan configured to blow exterior air to any one of the first radiator and the second radiator, and a controller configured to determine an RPM of the cooling fan based on a coolant temperature at an inlet of the fuel cell stack and a first exterior air temperature, to determine a target cooling performance of the plurality of power electronic parts based on power consumptions of the plurality of power electronic parts, and to determine an RPM of the second pump based on the target cooling performance of the plurality of power electronic parts, the RPM of the cooling fan, and a second exterior air temperature.

A system for reducing overdraw of power in a vehicle includes a power source having a battery and a fuel cell circuit. The system further includes an ECU that transmits a power limit signal to a vehicle controller, the power limit signal corresponding to an instantaneous maximum amount of power of the power source. The ECU also determines a battery allowed power corresponding to an amount of power available to be drawn from the battery to cause the SOC of the battery to remain above a lower SOC threshold. The ECU also determines a current battery power draw from the battery corresponding to an instantaneous amount of power being drawn from the battery. The ECU is designed to reduce the instantaneous maximum amount of power in the power limit signal when the current battery power draw is greater than the battery allowed power, reducing the current battery power draw.

The present disclosure generally relates to systems and methods for fuel cell regeneration after degradation.

The present disclosure generally relates to systems and methods for fuel cell regeneration after degradation.