The invention provides a water tank heating method and unit, an electronic device and a solid oxide fuel cell (SOFC) system. Before the SOFC system is started, ice in a water tank has been heated up, so after the SOFC system is started, the heating time of the heated ice, i.e., the thawing time of the water tank, will be shortened. Further, in the ice heating process, a pre-set needed SOFC thawing time determined according to current stack outlet temperature is used as a heating control parameter. As the stack outlet temperature is a key factor influencing the starting time of the SOFC system, the heating control will be more accurate if the pre-set needed SOFC thawing time corresponding to the stack outlet temperature is used as a heating control parameter.

The invention discloses an emission control system. A vehicle-mounted solid oxide fuel cell system using the emission control system comprises a stack and a burner. The emission control system comprises an EGR intake pipe, as well as an exhaust cooling device, a supercharging device, a gas storage device and an EGR valve connected in sequence by the EGR intake pipe. An inlet end of the EGR intake pipe is connected to an exhaust pipe of the burner, and an outlet end of the EGR intake pipe is connected to an inlet pipe between the stack and the burner. This solution adds an EGR system to the original vehicle-mounted solid oxide fuel cell system. As the introduced exhaust gas can reduce the ambient temperature of the inlet gas, the generation of pollutants such as NOx can be reduced. In addition, after the EGR exhaust gas participates in combustion, the combustion temperature is further reduced, thereby inhibiting the generation of pollutants such as NOx. The present invention also discloses a vehicle-mounted solid oxide fuel cell system comprising the foregoing emission control system.

A fuel cell system is provided and the fuel cell system includes: a fuel cell; a fuel processing unit configured to process a raw fuel to produce a fuel gas for the fuel cell; an oxidant gas heating unit configured to heat an oxidant gas for the fuel cell; a combustor configured to combust the raw fuel to produce a combustion gas for use in heating the fuel processing unit and the oxidant gas heating unit; a supply control unit configured to, during a warm-up of the fuel cell, control supply of the raw fuel to the fuel processing unit and the combustor; and a power generation control unit configured to control a power generation state during the warm-up of the fuel cell. When the fuel cell has reached a power generation available temperature, the power generation control unit is configured to cause the fuel cell to perform power generation, and the supply control unit is configured to supply the raw fuel to both the fuel processing unit and the combustor.

A fuel cell system is provided and the fuel cell system includes: a fuel cell; a fuel processing unit configured to process a raw fuel to produce a fuel gas for the fuel cell; an oxidant gas heating unit configured to heat an oxidant gas for the fuel cell; a combustor configured to combust the raw fuel to produce a combustion gas for use in heating the fuel processing unit and the oxidant gas heating unit; a supply control unit configured to, during a warm-up of the fuel cell, control supply of the raw fuel to the fuel processing unit and the combustor; and a power generation control unit configured to control a power generation state during the warm-up of the fuel cell. When the fuel cell has reached a power generation available temperature, the power generation control unit is configured to cause the fuel cell to perform power generation, and the supply control unit is configured to supply the raw fuel to both the fuel processing unit and the combustor.

A fuel cell system includes: a fuel cell that includes an installation port and a discharge port for a reactant gas; a first injection device that intermittently injects the reactant gas; second and third injection devices that continuously inject the reactant gas; an ejector that includes an ejection port for the reactant gas from the first or second injection device and the discharge port; a first flow passage that connects the installation port and the ejection port; a second flow passage through which the reactant gas from the third injection device is led to the first flow passage without the ejector; and a control device that performs a warm-up operation by executing the injection of the third injection device, executes the injection of the second injection device, and executes the injection of the first injection device after completion of the warm-up operation.

A fuel cell system includes: a fuel cell that includes an installation port and a discharge port for a reactant gas; a first injection device that intermittently injects the reactant gas; second and third injection devices that continuously inject the reactant gas; an ejector that includes an ejection port for the reactant gas from the first or second injection device and the discharge port; a first flow passage that connects the installation port and the ejection port; a second flow passage through which the reactant gas from the third injection device is led to the first flow passage without the ejector; and a control device that performs a warm-up operation by executing the injection of the third injection device, executes the injection of the second injection device, and executes the injection of the first injection device after completion of the warm-up operation.

Disclosed is a method of controlling an air supply system for a fuel cell. The air supply system includes a fuel cell stack, an air channel to supply air to an inlet of the fuel cell stack, a gas adsorption unit disposed on the air channel and configured to adsorb oxygen contained in air introduced into the air channel. In particular, the method includes: determining whether a power generation operation of the fuel cell stack is resumed; when the power generation operation of the fuel cell stack is resumed, controlling a voltage source to apply a voltage to the gas adsorption unit; and supplying air to the fuel cell stack through the air channel in a state in which the voltage is applied to the gas adsorption unit.

Disclosed is a method of controlling an air supply system for a fuel cell. The air supply system includes a fuel cell stack, an air channel to supply air to an inlet of the fuel cell stack, a gas adsorption unit disposed on the air channel and configured to adsorb oxygen contained in air introduced into the air channel. In particular, the method includes: determining whether a power generation operation of the fuel cell stack is resumed; when the power generation operation of the fuel cell stack is resumed, controlling a voltage source to apply a voltage to the gas adsorption unit; and supplying air to the fuel cell stack through the air channel in a state in which the voltage is applied to the gas adsorption unit.

The control device is configured so that when a temperature of the fuel cell at the time of start of power generation of the fuel cell is less than a standard temperature, it makes the fuel cell generate power so that the amount of heat generation of the fuel cell accompanying the power generation loss becomes a first amount of heat generation and so that when a cumulative value of current of a time period during which the fuel cell is made to generate power so that the amount of heat generation becomes the first amount of heat generation is equal to or greater than a predetermined cumulative value, it makes the fuel cell generate power so that the amount of heat generation becomes a second amount of heat generation larger than the first amount of heat generation.

The control device is configured so that when a temperature of the fuel cell at the time of start of power generation of the fuel cell is less than a standard temperature, it makes the fuel cell generate power so that the amount of heat generation of the fuel cell accompanying the power generation loss becomes a first amount of heat generation and so that when a cumulative value of current of a time period during which the fuel cell is made to generate power so that the amount of heat generation becomes the first amount of heat generation is equal to or greater than a predetermined cumulative value, it makes the fuel cell generate power so that the amount of heat generation becomes a second amount of heat generation larger than the first amount of heat generation.