A fuel cell system includes a fuel cell stack, a temperature measurement unit, and a controller. The controller is configured to, when the stack temperature is equal to or lower than a predetermined first threshold temperature at the time of startup of the fuel cell system, control a heat generation amount per unit time of the fuel cell stack to a set heat generation amount to perform a warming-up operation until the stack temperature increases to a target temperature, and when the stack temperature is equal to or higher than a predetermined second threshold temperature, execute at least one of setting the target temperature to be lower than the target temperature when the stack temperature is lower than the second threshold temperature and setting the set heat generation amount to be smaller than the set heat generation amount when the stack temperature is lower than the second threshold temperature.

A fuel cell system includes: a fuel cell stack; a coolant circulation path through which coolant for cooling the fuel cell stack flows; a cathode gas supply flow path that is connected to an inlet of the fuel cell stack, and in which a compressor that supplies cathode gas to the fuel cell stack is arranged; an intercooler that is arranged between an outlet of the compressor and the inlet of the fuel cell stack in the cathode gas supply flow path, is connected to the coolant circulation path, and cools cathode gas discharged from the compressor with use of the coolant; and a regulating valve that is arranged in the cathode gas supply flow path, and regulates a pressure between the outlet of the compressor and the inlet of the fuel cell stack when the fuel cell stack is being started at low temperature.

A fuel cell system includes: a reaction gas supply unit configured to supply a reaction gas to a fuel cell stack; a humidifier configured to transfer moisture from an off-gas discharged from the fuel cell stack to the reaction gas; and a controller configured to control the reaction gas supply unit so as to regulate a supply amount of the reaction gas, wherein the controller is configured to acquire a temperature of the humidifier and set the supply amount of the reaction gas based on a target power generation amount of the fuel cell stack, and in a case where the temperature of the humidifier is equal to or lower than a prescribed warm-up determination value, the controller executes warm-up control to increase the supply amount of the reaction gas as compared with a case where the temperature of the humidifier is higher than the warm-up determination value.

A method for starting a cold or frozen fuel cell stack as efficiently and quickly as possible in a vehicle application is based upon a state of charge of a first power source such as a high voltage battery. Power flow between the first power source and fuel cell system is coordinated in conjunction with a specific load schedule and parallel control algorithms to minimize the start time required and optimize system warm-up.

A fuel cell stack module includes a plurality of fuel cell stacks, a base supporting the plurality of fuel cell stacks, and a metal shell located over the base and the fuel cell stacks. The metal shell contains an integrated heat exchanger.

A fuel cell system includes an auxiliary machine to be connected to a fuel cell, warm-up power control means for controlling generated power of the fuel cell by adjusting power supplied to the auxiliary machine during the warm-up of the fuel cell, and IV characteristic estimation means for temporarily reducing the power supplied to the auxiliary machine and estimating an IV characteristic of the fuel cell on the basis of at least two pairs of current values and voltage values at that time during the warm-up of the fuel cell.

The invention relates to a fuel cell system (200) having at least two fuel cell units (210, 220) that are respectively designed to be operated independently from each other, wherein the fuel cell system (200) is designed to provide an amount of heat for activating a second fuel cell unit (210) of the at least two fuel cell units (210, 220) from waste heat of a first fuel cell unit (220).

A fuel-cell vehicle in which a fuel cell which is a driving power source is mounted includes a refrigerant flow passage that is connected to the fuel cell, a first pump that causes a refrigerant to flow in the refrigerant flow passage, a heater that heats the refrigerant, and a connection part that is electrically connected to the heater and the first pump and that is used for electrical connection to an external power source which is provided outside the fuel-cell vehicle. The heater and the first pump are driven with electric power supplied from the external power source which is connected thereto via the connection part.

The invention relates to a cooling system (10) for fuel cell stacks (22, 26), comprising a first cooling module (14) and a second cooling module (18). The first cooling module (14) comprises a fuel cell stack (22, 26), a supply line connection (30, 34) for connecting a supply line (38, 42) for supplying coolant to the fuel cell stack (22, 26), a discharge line connection (46, 50) for connecting a discharge line (54, 58) for discharging coolant from the fuel cell stack (22, 26), and a venting line connection (94, 98) for connecting a venting line (102, 106).

A fuel cell system includes a fuel cell configured to be supplied with fuel and air to generate electricity, a reformer configured to reform the fuel to be supplied to the fuel cell, a heat source device configured to heat an off-gas discharged from the fuel cell to produce a heating gas and configured to heat the reformer, a fuel cell heating device configured to heat the air to be supplied to the fuel cell using the heating gas, a fuel cell temperature acquisition unit configured to acquire a temperature of the fuel cell, and a reformer temperature acquisition unit configured to acquire a temperature of the reformer. The fuel cell system includes a controller configured to, in a warm-up operation to perform a warm-up of the reformer and a warm-up of the fuel cell, control at least one of the heat source device and the fuel cell heating device based on the temperature of the reformer and the temperature of the fuel cell to adjust at least one of a heating amount of the off-gas and a heating amount of the air by the heating gas.