A fuel cell system has a first boost converter of a fuel cell, a second boost converter of a secondary battery, and a control unit. Output sides of the first boost converter and the second boost converter are connected so as to be the same potential. The control unit is configured to, when detecting failure of the second boost converter, cause input and output sides of the second boost converter to conduct, estimate an open circuit voltage of the secondary battery based on a state of charge, and execute electric power consumption by an accessory that operates by electric power supplied from the fuel cell when determining that the first boost converter is not able to boost the output voltage of the fuel cell to the open circuit voltage, and stops the electric power consumption by the accessory when determining that the first boost converter is able to boost.

A fuel cell system has a first boost converter of a fuel cell, a second boost converter of a secondary battery, and a control unit. Output sides of the first boost converter and the second boost converter are connected so as to be the same potential. The control unit is configured to, when detecting failure of the second boost converter, cause input and output sides of the second boost converter to conduct, estimate an open circuit voltage of the secondary battery based on a state of charge, and execute electric power consumption by an accessory that operates by electric power supplied from the fuel cell when determining that the first boost converter is not able to boost the output voltage of the fuel cell to the open circuit voltage, and stops the electric power consumption by the accessory when determining that the first boost converter is able to boost.

A method for thermal conditioning at least one thermal buffer of a thermal system of a vehicle, the thermal system being a rechargeable energy storage system, RESS, and/or an energy transformation system comprising fuel cells, the thermal buffer having an operating window defined by the preferred operating temperature of the thermal buffer. The method includes providing predictive power utilization of the thermal buffer as a function of time, conditioning the thermal buffer in response to the predictive power utilization, such that the thermal buffer is thermally conditioned to be within the operating window of the thermal buffer. The operating window is varying as a function of the predictive power utilization over time.

A fuel cell system installed in a vehicle, the system comprising: a fuel cell, a secondary cell, a temperature acquirer for acquiring a temperature of the fuel cell, a state-of-charge value acquirer for acquiring a state-of-charge-value of the secondary cell, an outside temperature acquirer for acquiring an outside temperature, an outside pressure acquirer for acquiring an outside pressure, and a controller for controlling power of the secondary cell, wherein, when the temperature of the fuel cell exceeds a predetermined temperature, when the state-of-charge value of the secondary cell is a predetermined threshold value or more, when the outside temperature is a predetermined temperature or more, and when the outside pressure is a predetermined pressure or less, the controller increases the power of the secondary cell larger than power required of the secondary cell for normal running of the vehicle.

A fuel cell system installed in a vehicle, the system comprising: a fuel cell, a secondary cell, a temperature acquirer for acquiring a temperature of the fuel cell, a state-of-charge value acquirer for acquiring a state-of-charge-value of the secondary cell, an outside temperature acquirer for acquiring an outside temperature, an outside pressure acquirer for acquiring an outside pressure, and a controller for controlling power of the secondary cell, wherein, when the temperature of the fuel cell exceeds a predetermined temperature, when the state-of-charge value of the secondary cell is a predetermined threshold value or more, when the outside temperature is a predetermined temperature or more, and when the outside pressure is a predetermined pressure or less, the controller increases the power of the secondary cell larger than power required of the secondary cell for normal running of the vehicle.

A fuel cell system mounted on a vehicle includes a fuel cell, a fuel cell control unit having a normal mode and a meeting mode in which quietness is given a higher priority than in the normal mode, as a control mode of the fuel cell, a determining unit configured to determine whether there is a request to switch the control mode to the meeting mode, and a mode switch unit configured to switch the control mode to the meeting mode when the determining unit determines that there is a request to switch the control mode to the meeting mode.

A fuel cell system mounted on a vehicle includes a fuel cell, a fuel cell control unit having a normal mode and a meeting mode in which quietness is given a higher priority than in the normal mode, as a control mode of the fuel cell, a determining unit configured to determine whether there is a request to switch the control mode to the meeting mode, and a mode switch unit configured to switch the control mode to the meeting mode when the determining unit determines that there is a request to switch the control mode to the meeting mode.

Disclosed is a cooling apparatus of a fuel cell vehicle, including an air supply part, an air conditioning part that cools air discharged from the air supply part, and a valve provided at a rear end of the air supply part and that communicates cooled air discharged from the air supply part with a fuel cell part or a battery.

Disclosed is a cooling apparatus of a fuel cell vehicle, including an air supply part, an air conditioning part that cools air discharged from the air supply part, and a valve provided at a rear end of the air supply part and that communicates cooled air discharged from the air supply part with a fuel cell part or a battery.

Described herein is a fuel cell and battery hybrid system (1) comprising one or more sets (2) of serially connected fuel cells (FC1-n). The one or more sets (2) of serially connected fuel cells (FC1-n) are further serially connected via a respective fuel cell series enhancer (3). The serially connected sets (2) are further connected in parallel with a battery (4) via a fuel cell power charge controller (5). Each respective set (2) of serially connected fuel cells (FC1-n) is further arranged be controlled by the fuel cell series enhancer (3) to operate electrically independent from other sets (2) of serially connected fuel cells (FC1-n) and at its own unique maximum power point or uniquely selected other operating point, regardless of the operating points of other sets (2) of serially connected fuel cells (FC1-n).