The fuel cell system is a fuel cell system comprising a fuel cell stack assembly, wherein the fuel cell stack assembly comprises a fuel cell stack and a data storage configured to store a start-up history of the fuel cell stack; wherein the data storage comprises a detector configured to detect a presence or absence of a connection to at least one selected from the group consisting of an external power source and an external communication device; and wherein the data storage starts up when a voltage of the fuel cell stack is a predetermined threshold value or more.

A control device of a fuel cell system does not execute feedback control of an air valve in a case where a first condition in which a valve opening degree command value calculated by the control device is less than a command value threshold and a second condition in which a valve opening degree measurement value measured by an air valve opening degree sensor is less than a measurement value threshold are satisfied, and executes the feedback control of the air valve in a case where the first condition or the second condition is not satisfied.

A control device of a fuel cell system does not execute feedback control of an air valve in a case where a first condition in which a valve opening degree command value calculated by the control device is less than a command value threshold and a second condition in which a valve opening degree measurement value measured by an air valve opening degree sensor is less than a measurement value threshold are satisfied, and executes the feedback control of the air valve in a case where the first condition or the second condition is not satisfied.

A system and method for predictive fuel cell management system for an integrated hydrogen-electric engine is disclosed. The system includes a fuel cell stack having a plurality of fuel cells and a computer having a memory and one or more processors. The one or more processors configured to predict, during a first phase of energy demand on the integrated hydrogen-electric engine, an impending occurrence of a second phase of energy demand on the integrated hydrogen-electric engine, wherein the second phase of energy demand includes a predetermined energy demand; and generate a predetermined amount of energy from the plurality of fuel cells based on the predicted second phase of energy demand prior to starting the second phase of energy demand to improve energy efficiency and performance of the integrated hydrogen-electric engine.

A system and method for predictive fuel cell management system for an integrated hydrogen-electric engine is disclosed. The system includes a fuel cell stack having a plurality of fuel cells and a computer having a memory and one or more processors. The one or more processors configured to predict, during a first phase of energy demand on the integrated hydrogen-electric engine, an impending occurrence of a second phase of energy demand on the integrated hydrogen-electric engine, wherein the second phase of energy demand includes a predetermined energy demand; and generate a predetermined amount of energy from the plurality of fuel cells based on the predicted second phase of energy demand prior to starting the second phase of energy demand to improve energy efficiency and performance of the integrated hydrogen-electric engine.

Disclosed are a method of improving fuel efficiency of a fuel cell electric vehicle, and an apparatus and a system therefor. The method includes collecting navigation information and vehicle speed information, calculating a coasting line when a specified event point is detected based on the navigation information, determining whether deceleration is necessary by comparing a current traveling speed with a coasting line speed corresponding to a current location, and changing a criterion for determining whether to enter a fuel cell stop (FC STOP) state when the deceleration is necessary as a determination result.

Disclosed are a method of improving fuel efficiency of a fuel cell electric vehicle, and an apparatus and a system therefor. The method includes collecting navigation information and vehicle speed information, calculating a coasting line when a specified event point is detected based on the navigation information, determining whether deceleration is necessary by comparing a current traveling speed with a coasting line speed corresponding to a current location, and changing a criterion for determining whether to enter a fuel cell stop (FC STOP) state when the deceleration is necessary as a determination result.

An automotive fuel cell stack includes anodes and cathodes, and a controller that, after receiving data indicating that load current demand is within a first pre-determined range, modulates a flow rate of air to the cathodes between zero and a pre-determined value until a cell output voltage achieves a value falling within a second pre-determined range greater than zero.

An automotive fuel cell stack includes anodes and cathodes, and a controller that, after receiving data indicating that load current demand is within a first pre-determined range, modulates a flow rate of air to the cathodes between zero and a pre-determined value until a cell output voltage achieves a value falling within a second pre-determined range greater than zero.

A catalyst deterioration suppression device includes: a first device obtaining a fuel cell voltage V (=catalyst voltage V.sub.cat) as a variable to estimate a response speed (time constant τ) at which a coverage ratio of an oxide film of catalyst particles contained in a fuel cell cathode changes; a second device reading out a time constant τ.sub.t corresponding to the voltage V at a current time t from a pre-made map A representing a relationship between the voltage V and the time constant τ and corresponding to the catalyst particles; a third device generating a continuous-time type dynamic filter F(s, τ) by using the time constant τ.sub.t and converting the continuous-time type dynamic filter F(s, τ) to a discrete-time type dynamic filter F(z, τ); and a fourth device inputting a target voltage Vr to the discrete-time type dynamic filter F(z, τ) and outputting a corrected target voltage V.sub.r-fil.