A method for controlling a fuel cell that includes an electrochemical reactor; a cooling circuit; a controller; a coolant circuit; a first temperature sensor; and a second temperature sensor. The cooling circuit includes a cooling pipe and is configured to cool the electrochemical reactor; the controller is configured to control operations of the electrochemical reactor and the cooling circuit; the cooling pipe includes a first water inlet and a first water outlet; and the coolant circuit is connected to the first water inlet and the first water outlet. The method includes comparing the first temperature of the coolant at the first water inlet to the second temperature at the first water outlet; and controlling operations of the heater and the electrochemical reactor based on the comparison result.

A fuel cell system includes a first ion exchanger, a first fuel cell stack and a second fuel cell stack, a first temperature acquisition part and a second temperature acquisition part, a first power generation time acquisition part and a second power generation time acquisition part, a supply path, an ion concentration estimation part that estimates ion concentration of a refrigerant on the basis of the ion concentration estimated by the ion concentration estimation part, a determination part that determines an exchange timing of the first ion exchanger on the basis of the ion concentration estimated by the ion concentration estimation part, and a control part, and a first refrigerant flow path and a second refrigerant flow path are provided in series or in parallel.

A fuel cell system includes a first ion exchanger, a first fuel cell stack and a second fuel cell stack, a first temperature acquisition part and a second temperature acquisition part, a first power generation time acquisition part and a second power generation time acquisition part, a supply path, an ion concentration estimation part that estimates ion concentration of a refrigerant on the basis of the ion concentration estimated by the ion concentration estimation part, a determination part that determines an exchange timing of the first ion exchanger on the basis of the ion concentration estimated by the ion concentration estimation part, and a control part, and a first refrigerant flow path and a second refrigerant flow path are provided in series or in parallel.

The disclosure provides a high-efficiency heat exchanger for a temperature control system of a fuel cell and a processing device thereof. The processing device includes a frame body and a power box. A bottom of the frame body is fixed to the ground by screws, and the power box is arranged at a side of the frame body for intelligent control. A displacement screw is arranged on a top of the frame body, and a sliding block driven by electricity is arranged on a surface of the displacement screw. Two ends of the displacement screw are respectively provided with a limit switch for controlling a limit position of the sliding block. A drive motor is arranged on a surface of the sliding block, and a displacement sensor is arranged on one side surface of the sliding block.

The disclosure provides a high-efficiency heat exchanger for a temperature control system of a fuel cell and a processing device thereof. The processing device includes a frame body and a power box. A bottom of the frame body is fixed to the ground by screws, and the power box is arranged at a side of the frame body for intelligent control. A displacement screw is arranged on a top of the frame body, and a sliding block driven by electricity is arranged on a surface of the displacement screw. Two ends of the displacement screw are respectively provided with a limit switch for controlling a limit position of the sliding block. A drive motor is arranged on a surface of the sliding block, and a displacement sensor is arranged on one side surface of the sliding block.

An ion exchanger includes a housing and a cartridge. The housing has an inlet port, through which coolant flows in, and an outlet port, through which the coolant flows out. The cartridge is detachably attached to the housing. The cartridge is filled with ion-exchange resin. The ion exchanger is configured to remove ions from the coolant through ion exchange when the coolant flowing in the housing passes through the ion-exchange resin. The cartridge includes a bypass route that causes some of the coolant that has flowed into the housing to bypass the ion-exchange resin and flow to the outlet port.

An ion exchanger includes a housing and a cartridge. The housing has an inlet port, through which coolant flows in, and an outlet port, through which the coolant flows out. The cartridge is detachably attached to the housing. The cartridge is filled with ion-exchange resin. The ion exchanger is configured to remove ions from the coolant through ion exchange when the coolant flowing in the housing passes through the ion-exchange resin. The cartridge includes a bypass route that causes some of the coolant that has flowed into the housing to bypass the ion-exchange resin and flow to the outlet port.

An electrochemical cell has at least one plate element which can be cooled by a liquid coolant, such as water. The plate element has a surface that can be wetted for the purpose of cooling with the coolant. The surface of the plate element in the electrochemical cell is configured such that a contact angle between the surface and the liquid coolant is less than 90°. In the method for producing the electrochemical cell an additional method step is carried out which influences the wettable surfaces of plate elements for cooling with coolant and by which a contact angle between the surface and the coolant is decreased.

Described are systems and methods for directly monitoring the conductivity of the coolant used to regulate the temperature of a fuel cell. The system includes a coolant loop that acts as a conduit for the coolant, an ion exchanger configured to deionize the coolant, and a conductivity sensor configured to output an electrical signal indicating a conductivity of the coolant. The system also includes a processor in communication with the conductivity sensor and a memory having instructions that, when executed by the processor, cause the processor to determine the conductivity of the coolant based on the electrical signal from the conductivity sensor and determine when the ion exchanger requires servicing based on the conductivity of the coolant.

A cooling circuit for a fuel cell includes at least one channel, a mechanical support, a first sensor, and a second sensor. Each channel is formed in a bipolar plate of the fuel cell, and is adapted to permit a cooling fluid to flow. The first sensor senses a flow rate of the cooling fluid. The second sensor senses an electrical conductivity of the cooling fluid. Both the first sensor and the second sensor are installed on the mechanical support.