A cooling system comprises a liquid hydrogen storage tank, a liquid hydrogen metering pump having a pump inlet in fluid communication with the liquid hydrogen storage tank, and a pump outlet, a hydrogen evaporator heat exchanger having an evaporator inlet in fluid communication with the pump outlet, and an evaporator outlet, a hydrogen gas accumulator having an accumulator inlet in fluid communication with the evaporator outlet, and an accumulator outlet, a hydrogen fuel cell system comprising at least one hydrogen fuel cell having a fuel cell inlet in fluid communication with the accumulator outlet, and a coolant circuit comprising a first coolant path disposed in thermal contact with the hydrogen evaporator heat exchanger.

A fuel cell includes a cell stack configured such that a plurality of unit cells is stacked, an end plate disposed at one of two ends of the cell stack, the end plate including an air inlet, an air outlet, and a groove portion including a first groove adjacent to and spaced apart from the air outlet and a second groove connecting the first groove to the air inlet, and a cover configured to cover a region of the end plate in which the air inlet, the groove portion and the air outlet are formed so as to form a flow path together with the second groove to allow air to pass therethrough. The cover includes a first through-hole communicating with the first groove, a second through-hole communicating with the air outlet, and a partition wall isolating the first and second through-holes from each other.

A battery system cools a battery device by supplying a coolant to the battery device. The battery system includes a coolant flow path through which the coolant circulates, a coolant pump to control a flow of the coolant passing through the coolant flow path to circulate the coolant between the battery device and the coolant flow path, a differential pressure sensor to detect a differential pressure between a pressure of the coolant passing through a coolant supply port from the coolant flow path to the battery device and a pressure of the coolant passing through a coolant discharge port from the battery device to the coolant flow path, and a controller to determine whether there is a leakage of the coolant based on a comparison between the differential pressure acquired from the differential pressure sensor and an estimated value stored in advance.

A method for operating a fuel cell system having a fuel cell stack includes detecting a failure of a first cooling fan that blows exterior air to a first radiator, opening a first valve such that first cooling water that passes via the fuel cell stack flows toward the fuel cell stack, controlling an RPM of a blower of an air conditioning system to a maximum level, controlling an opening degree of a second valve according to a cooling degree of the first radiator and a cooling degree of the air conditioning system, and controlling an RPM of a first pump that pumps the first cooling water to a maximum level.

A fuel cell system (200), wherein the fuel cell system (200) has: a) a fuel cell stack (10), b) an anode gas path (20) which fluidically communicates with the fuel cell stack (10) and which serves for supplying anode gas from an anode gas store (22) to the fuel cell stack (10), c) a cathode gas path (30) which fluidically communicates with the fuel cell stack (10) and which serves for supplying cathode gas from a cathode gas store (32) to the fuel cell stack (10), d) a cooling fluid path (40) which fluidically communicates with the fuel cell stack (10) and which serves for supplying cooling fluid from a cooling fluid store (42) to the fuel cell stack (10), e) a vibration generator (60) which is in data-transmitting communication with a control unit (50) and which serves for setting the fuel cell stack (10) into a vibrating state, and f) the control unit (50) for actuating the vibration generator (60) in order to set the fuel cell stack (10) into the vibrating state by means of the vibration generator (60).

A fuel cell system includes a fuel cell configured to produce electrical power by a chemical reaction of a flow of fuel and a flow of oxygen or air with an electrolyte and a cooling system configured to remove thermal energy from the fuel cell via a flow of coolant through the fuel cell. The fuel cell system includes one or more conductivity sensors configured to measure a change in conductivity of the coolant flow. A method of operating a fuel cell system includes producing electrical power at a fuel cell by a chemical reaction of a flow of fuel and a flow of air with an electrolyte, urging a flow of coolant through the fuel cell to remove thermal energy and ions from the fuel cell, and measuring a conductivity of the flow of coolant via one or more conductivity sensors.

A fuel cell system includes a fuel cell stack, a first cooling line configured to circulate a first coolant that passes via the fuel cell stack, a first radiator disposed on the first cooling line, a valve configured to switch a flow path of the first coolant to the fuel cell stack or the first radiator, and a controller connected to the valve and configured to set a target temperature at an inlet of the fuel cell stack and a correction coefficient for controlling an opening degree of the valve, measure a first coolant temperature at an outlet of the fuel cell stack and a second coolant temperature at an outlet of the first radiator, calculate the opening degree of the valve based on the first coolant temperature, the second coolant temperature, the target temperature, and the correction coefficient, and correct the correction coefficient based on comparison of a third coolant temperature at the inlet of the fuel cell stack and the target temperature, in response to the opening degree being within a first range.

A fuel cell system for a vehicle includes a first cooling line configured to pass through a fuel cell stack in a vehicle and configured to circulate a first coolant therein, a first cooler provided in the first cooling line and configured to cool the first coolant, and a second cooler provided in the first cooling line and configured to cool the first coolant independently from the first cooler, thereby obtaining an advantageous effect of ensuring a high output from the fuel cell stack and improving safety and reliability.

A fuel cell system includes a sensor device that measures a coolant temperature at an inlet of a fuel cell and an outside-air temperature, a cooling fan that cools a coolant, and a cooling fan controller connected with the sensor device and the cooling fan. The cooling fan controller determines an RPM of the cooling fan, based on the outside-air temperature and an output value of the fuel cell and corrects the RPM of the cooling fan, based on the coolant temperature at the inlet of the fuel cell.

An FC (fuel cell) system includes: an FC; a radiator configured to cool a CL (cooling liquid); an ion exchanger provided in a BFP (bypass flow path) branched off from a CFP (circulation flow path) for allowing the CL to circulate between the FC and the radiator; a multi-way valve provided in a branching point at which the BFP is branched off from the CFP; and a pump which circulates the CL. A percentage of the CL that is made to flow through the BFP can be controlled by the multi-way valve. In a case in which a stop time is longer than a threshold time when the FC system is started up, after the CL is circulated through the radiator, the CL is circulated through the BFP at the percentage of 80% or more until electrical conductivity of the CL becomes smaller than a threshold electrical conductivity.