Abstract: A dosing apparatus distributing a coolant on a radiator, which has at least one supply line for transporting the coolant, in which there is at least one nozzle for distributing the coolant on the radiator is provided. The nozzles are designed to distribute the coolant in a laminar stream.

Abstract: A cooling system for a vehicle may include a cooling circuit through which a coolant is flowable. The cooling circuit may include a first heat source, a first radiator, a second heat source, a second radiator, and a hydraulic switch. The first heat source may be coolable at a lower temperature level. The second heat source may be coolable at a higher temperature level. The first heat source, the first radiator, the second heat source, and the second radiator may be connected in series with one another in the cooling circuit. The hydraulic switch may divide the cooling circuit into (i) a first partial circuit with the first heat source and the first radiator and (ii) a second partial circuit with the second heat source and the second radiator.

Abstract: A cooler passivation process for a coolant cooler of a cooler device mounted in a motor vehicle A cooler device with a coolant cooler is provided, the latter having at least one aluminum cooling channel with a cooler surface provided with flux. The cooler device is provided in a motor vehicle and is then put into operation with at least one fuel cell of the motor vehicle. In order to form a passivation layer on the coolant cooler, according to the invention a previously provided aqueous passivation solution is formed from passivation layer forming material and fuel cell wastewater is applied to the cooler surface, provided with the flux, of the at least one aluminum cooling channel, the passivation solution reacting with the cooler surface, provided with the flux, of the at least one aluminum cooling channel while thermal energy provided by the coolant cooler is supplied, forming a passivation layer.

Abstract: The invention relates to a method for operating a fuel cell system, comprising a cooling circuit for cooling at least one fuel cell, wherein a coolant circulating in the cooling circuit is cooled with a coolant cooler, which also has air flowing through it. The air is supplied by a fan assembly. The fuel cell system also comprises an evaporative cooling unit, which, upstream of the coolant cooler, introduces water into the air supplied by the fan assembly. An increased efficiency of the fuel cell system alongside sufficient cooling of the at least one fuel cell is achieved in that the evaporative cooling unit introduces water at a maximum rate before the fan assembly reaches its maximum air mass flow. The invention also relates to a fuel cell system of this type, as well as a motor vehicle comprising a fuel cell system of this type.

Abstract: The invention relates to a method for operating a fuel cell system, comprising a cooling circuit for cooling at least one fuel cell, wherein a coolant circulating in the cooling circuit is cooled with a coolant cooler, which also has air flowing through it. The air is supplied by a fan assembly. The fuel cell system also comprises an evaporative cooling unit, which, upstream of the coolant cooler, introduces water into the air supplied by the fan assembly. An increased efficiency of the fuel cell system alongside sufficient cooling of the at least one fuel cell is achieved in that the evaporative cooling unit introduces water at a maximum rate before the fan assembly reaches its maximum air mass flow. The invention also relates to a fuel cell system of this type, as well as a motor vehicle comprising a fuel cell system of this type.

Abstract: A cooler passivation process for a coolant cooler of a cooler device mounted in a motor vehicle A cooler device with a coolant cooler is provided, the latter having at least one aluminum cooling channel with a cooler surface provided with flux. The cooler device is provided in a motor vehicle and is then put into operation with at least one fuel cell of the motor vehicle. In order to form a passivation layer on the coolant cooler, according to the invention a previously provided aqueous passivation solution is formed from passivation layer forming material and fuel cell wastewater is applied to the cooler surface, provided with the flux, of the at least one aluminum cooling channel, the passivation solution reacting with the cooler surface, provided with the flux, of the at least one aluminum cooling channel while thermal energy provided by the coolant cooler is supplied, forming a passivation layer.

Abstract: A heat exchanger for a fuel cell is disclosed. The heat exchanger includes at least two tube bodies that are arranged at a distance from one another and are in each case structured so that a fluid can flow through internally and so that air can flow around externally. A water channel, through which water can flow fluidically separated from the fluid, is arranged in or on at least one tube body. At least one opening, via which the water channel communicates fluidically with an external environment of the at least one tube body, is provided on the at least one tube body. The at least one opening is arranged in the at least one tube body so that at least one of the tube bodies can be wetter with water, which is guided through the water channel and escapes the water channel through the at least one opening.

Abstract: The invention relates to a method for sprinkling a heat exchanger of a fuel cell vehicle with a fluid. The heat exchanger comprises a sprinkling surface and at least one group with at least one part surface. All part surfaces of all groups together fully represent the sprinkling surface. In the method, all part surfaces of the group are sprinkled with the fluid within a sprinkling period and not sprinkled within a drying period. The invention also relates to a sprinkling system for carrying out the method.

Abstract: A freeze protection method for a fuel cell system is disclosed. The fuel cell system includes an evaporative cooler device equipped for cooling a heat exchanger of a fuel cell device of the fuel cell system having a feed line, through which during the operation of the fuel cell system, water is pumped to a sprinkling device of the evaporative cooler device and by way of the sprinkling device, the water is applied onto the heat exchanger equipped for temperature-controlling a fuel cell stack of the fuel cell device. The method includes blowing out the evaporative cooler device as part of a deactivation method of the fuel cell system.

Abstract: A fuel cell device of a motor vehicle is disclosed. The fuel cell device includes a fuel cell, a supply air path leading to the fuel cell for a cathode supply air flow, and an exhaust air path leading away from the fuel cell for a cathode exhaust air flow. The supply air path and the exhaust air path are routed through a humidifier that humidifies the supply air and dehumidifies the exhaust air. The exhaust air path is further routed through a water separator that removes water from the exhaust air to provide evaporation water. A heat exchanger for cooling the fuel cell is provided that has an evaporative cooler for cooling the heat exchanger. The evaporative cooler is assigned to the water separator in fluidic communication and is supplied with evaporation water by the water separator.

Abstract: A cooling system for a fuel cell of a motor vehicle may include a closed coolant circuit through which a coolant is circulatable, a heat exchanger fluidically incorporated in the coolant circuit for cooling the coolant, an open sprinkler circuit through which a sprinkler fluid is flowable for cooling the heat exchanger, and a channel structure fluidically incorporated in the sprinkler circuit. The heat exchanger may include an air inlet surface, an air outlet surface, and a plurality of cooling tubes. The coolant may be flowable through the heat exchanger via the plurality of cooling tubes. Air may be flowable through the heat exchanger from the air inlet surface to the air outlet surface. The channel structure may include a plurality of channels, which may each include a plurality of outlet nozzles via which the sprinkler fluid is appliable to the plurality of cooling tubes.

Abstract: A heat exchanger for a fuel cell is disclosed. The heat exchanger includes at least two tube bodies that are arranged at a distance from one another and are in each case structured so that a fluid can flow through internally and so that air can flow around externally. A water channel, through which water can flow fluidically separated from the fluid, is arranged in or on at least one tube body. At least one opening, via which the water channel communicates fluidically with an external environment of the at least one tube body, is provided on the at least one tube body. The at least one opening is arranged in the at least one tube body so that at least one of the tube bodies can be wetter with water, which is guided through the water channel and escapes the water channel through the at least one opening.

Abstract: The invention relates to a cooling system (1) for a vehicle. The cooling system (1) comprises a cooling circuit (2) having a first and second heat source (3a, 3b) and a first and second radiator (4a, 4b). In the cooling circuit (2), the heat sources (3a, 3b) and the radiator (4a, 4b) are connected in series with one another. A hydraulic switch (6) divides the cooling circuit (2) into two partial circuits (2a, 2b). The respective partial circuit (2a, 2b) each includes the respective heat sources (3a, 3b) and the respective radiator (4a, 4b). The invention also relates to a method for operating the cooling system (1).

Abstract: A cooling system for a vehicle is disclosed. The cooling system includes a cooling circuit that is flowed through by a coolant. The cooling circuit includes a first heat source, a first radiator, a second heat source, and a second radiator. A first partial circuit is provided with the first heat source and the first radiator fluidically connected to one another. A second partial circuit is provided with the second heat source and the second radiator fluidically connected to one another. The first partial circuit and the second partial circuit can be hydraulically separated from one another at times such that the two partial circuits are flowed through by a part of the coolant, and hydraulically connected to one another at times such that the two partial circuits can be jointly flowed through by a common part of the coolant.

Abstract: A motor vehicle may include a drive mechanism, a discharge system through which a gas mass flow containing liquid droplets may flow, a pressure-reducing mechanism incorporated in the discharge system, a cooling circuit through which a coolant may circulate to cool a drive component of the drive mechanism, a coolant radiator through with the coolant may flow, an air path extending through the coolant radiator, an evaporative cooling mechanism, a reservoir free of applied additional pressure, a liquid path, and a supply path. The pressure-reducing mechanism may be configured such that the gas mass flow downstream of the pressure-reducing mechanism is free of applied additional pressure. The evaporative cooling mechanism may be configured to introduce liquid into the air path. The liquid path may extend from the pressure-reducing mechanism to an inlet of the reservoir. The supply path may extend from the storage volume to the evaporative cooling mechanism.

Abstract: An evaporation water tank for a fuel cell device may include a tank bottom, a plurality of tank side walls, and a tank cover that collectively define a collection volume for evaporation water and tank air. The plurality of tank side walls may be arranged on and project away from the tank bottom. The tank cover may be arranged a distance away from the tank bottom and on the plurality of tank side walls. The tank may also include an evaporation water inlet via which an inflow of evaporation water is flowable into the collection volume and at least one evaporation water outlet via which an outflow of evaporation water is flowable from the collection volume. The evaporation water inlet may be arranged on at least one of the plurality of tank side walls. The at least one evaporation water outlet may be arranged on the tank bottom.

Abstract: The present invention relates to a fuel cell device (1) having a fuel cell (2) which, during operation, emits water as a product of cold combustion; a supply air path (3) leading to the fuel cell (2) for a cathode supply air flow (5), which defines a supply air flow direction (4), the cathode supply air flow coming from water-containing supply air supplied to the fuel cell (2); and an exhaust air path (7)leading away from the fuel cell (2), for a cathode exhaust air flow (9), which defines an exhaust air flow direction (8), the cathode exhaust air flow coming from water-containing exhaust air flowing out of the fuel cell (2). The supply air path (3) and the exhaust air path (7) are routed through a humidifier (10) of the fuel cell device (1), which humidifier communicates fluidically with the supply air and the exhaust air, to humidify the supply air and dehumidifying the exhaust air.

Abstract: A thermal management system for a vehicle may include a refrigerant circuit in which a refrigerant circulates, as well as a heating circuit, a first coolant circuit configured for a temperature control of a drive device of the vehicle, and a second coolant circuit configured for a temperature control of an electrical store of the vehicle in which a coolant circulates. The system may further include a chiller incorporated in the refrigerant circuit and a chiller guide fluidically separate from the refrigerant circuit. The chiller guide may have a chiller path configured to conduct the coolant and which extends through the chiller, and may have a bypass path configured to conduct the coolant and which circumvents the chiller. The system may additionally include a chiller valve device configured to selectively fluidically connect the first coolant circuit and the second coolant circuit to the chiller path and the bypass path.

Abstract: A system for a motor vehicle for heating and/or cooling a battery and a motor vehicle interior is provided that includes a first coolant circuit thermally coupled to the battery, a second coolant circuit for heating the motor vehicle interior having an air heat exchanger for outputting heat from the second coolant circuit to the air of the interior of the motor vehicle, and a heating unit for heating the second coolant circuit. The first coolant circuit and the second coolant circuit are thermally coupled to each other for heating the battery using heat from the second coolant circuit and/or for cooling the air of the motor vehicle interior, in that heat from the second coolant circuit can be fed to the first coolant circuit by the circuit heat exchanger or the mixing valve.

Abstract: An intercooler may include an air-outlet tank, a condensate collector for collecting condensate separated off the intercooler, and a condensate line connected to the condensate collector via an entrance and that opens out into the air-outlet tank via an exit. There may be a pressure difference between the entrance and the exit of the condensate line during operation of the intercooler, and said pressure difference may allow differential-pressure-induced discharge of condensate from the condensate collector via the condensate line.