Abstract: Disclosed is a device for preventing over pressure of a cooling system of a fuel cell system. The device detects a change in a temperature of a coolant discharged from a fuel cell stack and prevents over pressure of the cooling system before pressure of the coolant is elevated by the increase in the temperature. In particular, in the cooling system of a fuel cell system which includes a coolant pump for circulating a coolant to a fuel cell stack, a radiator for radiating heat absorbed in the coolant, and a temperature sensor for detecting a temperature of the coolant discharged from the fuel cell stack the device includes: an electronic valve mounted in a pillar neck of the radiator connected with a reservoir for supplementing a coolant to open and close the pillar neck; and a fuel cell controller configured to control an operation of the electronic valve based on a signal of the temperature sensor.

Abstract: An air supply device using a cooling water heater of a fuel cell vehicle can effectively reduce cold starting time of the fuel cell vehicle and effectively remove moisture in a stack in cold shut down (CSD) of the fuel cell vehicle. In the air supply device, a bypass flow path is formed to be branched from a first air supply line connected between an air blower for supplying air to a fuel cell stack and a humidifier for humidifying the air supplied to the stack. The bypass flow path allows air exhausted from the air blower to pass through a cooling water heater by bypassing the humidifier and then to be supplied to the stack.

Abstract: A thermal management system is provided which may be miniaturized and may have a reduced weight by integrating thermal management parts in a fuel cell vehicle. In particular, a new type of thermal management system integrated housing in which a housing of a pump housing part, a housing of a 3-way valve fluid part, and a bypass channel among parts of the thermal management system for a fuel cell vehicle are integrated into a single structure to reduce the size of the overall system.

Abstract: The present invention provides a heating device with cathode oxygen depletion (COD) function for a fuel cell vehicle, in which an existing COD and a heating device for improving cold startability of the fuel cell vehicle are integrated. For this purpose, the present invention provides a heating device with COD function for a fuel cell vehicle, the heating device including: a housing having an inlet and an outlet formed on both ends thereof; a start-up heater and a shut-down heater provided in parallel on one side of the housing in a direction perpendicular to a coolant flow direction; and a plurality of heaters for heating coolant provided in parallel on the other side of the housing in a direction perpendicular to the coolant flow direction, wherein cross sections in the coolant flow direction of each of the respective heaters change periodically along the longitudinal direction of the heater so as to cause a flow disturbance.

Abstract: The present invention provides an induction heating device for a fuel cell system, which can rapidly heat coolant during cold start-up, control the power consumption depending on the voltage of a fuel cell stack, and ensure the insulation resistance by separating a heating unit, which is in contact with the coolant, from the outside.

Abstract: Disclosed are a device and method for detecting the coolant level in a thermal management system for a fuel cell vehicle, which can accurately and rapidly detect the lack of coolant using a detection value of a pressure sensor. That is, the present invention provides a device and method for detecting the coolant level in a thermal management system for a fuel cell vehicle, which can accurately and rapidly monitor the lack of coolant by calculating in real time the lack of coolant based on a change in slope value and a change in amplitude of a detection value of a pressure sensor according to the flow of coolant while the pressure sensor is mounted in a coolant line connected to an inlet of a fuel cell stack and a reservoir is connected to a pressure cap of a radiator.

Abstract: Disclosed are a device and method for detecting the coolant level in a thermal management system for a fuel cell vehicle, which can accurately and rapidly detect the lack of coolant using a detection value of a pressure sensor. That is, the present invention provides a device and method for detecting the coolant level in a thermal management system for a fuel cell vehicle, which can accurately and rapidly monitor the lack of coolant by calculating in real time the lack of coolant based on a change in slope value and a change in amplitude of a detection value of a pressure sensor according to the flow of coolant while the pressure sensor is mounted in a coolant line connected to an inlet of a fuel cell stack and a reservoir is connected to a pressure cap of a radiator.

Abstract: The present invention provides a coolant reservoir tank for a fuel cell vehicle, in which the coolant reservoir tank is positioned at a bottom of the vehicle such that coolant in a coolant line is collected in the reservoir tank by gravity during shutdown of a fuel cell system and the coolant in the reservoir tank is supplied to the coolant line by a vacuum pump during startup of the fuel cell system. For this purpose, the present invention provides a coolant reservoir tank including: a coolant reservoir tank for a fuel cell vehicle, the coolant reservoir tank comprising: a reservoir housing having a predetermined volume of space; a cover for covering the top of the reservoir housing; and a plurality of ports detachably provided on at least one portion of the cover, wherein the reservoir housing and the cover are connected by a hinge type fastening member.

Abstract: The present invention provides an induction heating device for a fuel cell system, which can rapidly heat coolant during cold start-up, control the power consumption depending on the voltage of a fuel cell stack, and ensure the insulation resistance by separating a heating unit, which is in contact with the coolant, from the outside.

Abstract: The present invention provides a positive temperature coefficient (PTC) heating device with a cathode oxygen depletion (COD) function for a fuel cell vehicle, which can improve durability of a fuel cell stack by reacting residual oxygen with hydrogen to be consumed as heat and improve cold startability by rapidly heating a coolant even at a temperature below the freezing point, the PTC heating device including a housing having an inlet and an outlet, formed on both ends there of, and a PTC heater fixed in the inside of the housing and including an electrode to which electric power is applied from the outside, a PTC heating element disposed on the electrode, and an insulating tape for insulating the PTC heater from a coolant flowing in the housing. Accordingly, it is possible to improve electrical safety and heat transfer performance and effectively prevent bubbles from forming, compared with a conventional cartridge heater.

Abstract: A thermal management system module for a fuel cell vehicle includes its component parts mounted on a single mounting frame, thus increasing space usage and layout efficiency, reducing overall weight and manufacturing costs and improving piping and wiring efficiency and assembling efficiency of the thermal management system.

Abstract: The present invention provides a coolant reservoir tank for a fuel cell vehicle, in which the coolant reservoir tank is positioned at a bottom of the vehicle such that coolant in a coolant line is collected in the reservoir tank by gravity during shutdown of a fuel cell system and the coolant in the reservoir tank is supplied to the coolant line by a vacuum pump during startup of the fuel cell system. For this purpose, the present invention provides a coolant reservoir tank including: a coolant reservoir tank for a fuel cell vehicle, the coolant reservoir tank comprising: a reservoir housing having a predetermined volume of space; a cover for covering the top of the reservoir housing; and a plurality of ports detachably provided on at least one portion of the cover, wherein the reservoir housing and the cover are connected by a hinge type fastening member.

Abstract: The present invention provides a heating device with cathode oxygen depletion (COD) function for a fuel cell vehicle, in which an existing COD and a heating device for improving cold startability of the fuel cell vehicle are integrated. For this purpose, the present invention provides a heating device with COD function for a fuel cell vehicle, the heating device including: a housing having an inlet and an outlet formed on both ends thereof; a start-up heater and a shut-down heater provided in parallel on one side of the housing in a direction perpendicular to a coolant flow direction; and a plurality of heaters for heating coolant provided in parallel on the other side of the housing in a direction perpendicular to the coolant flow direction, wherein cross sections in the coolant flow direction of each of the respective heaters change periodically along the longitudinal direction of the heater so as to cause a flow disturbance.