KR-102962190-B1 - Hydrogen refueling system for vehicle

Abstract

The present invention relates to a hydrogen refueling system for vehicles, and more specifically, to a hydrogen refueling system for vehicles that facilitates the separation of a refueling nozzle for a hydrogen refueling station and a receptacle for a vehicle hydrogen tank even when freezing occurs, and prevents the temperature of the vehicle hydrogen tank from rising excessively.

Inventors

• 구진우
• 정명주

Assignees

• 현대자동차주식회사
• 기아 주식회사

Dates

Publication Date

20260507

Application Date

20200722

Claims (5)

1. A dispenser for a hydrogen refueling station connected to a receptacle for hydrogen refueling of a vehicle's hydrogen tank; A charging valve installed in the hydrogen supply piping between the hydrogen storage container of the hydrogen charging station and the dispenser, which opens the hydrogen supply piping when charging hydrogen into the vehicle hydrogen tank; A hydrogen buffer tank connected to a branch pipe branched from the hydrogen supply pipe, which receives and temporarily stores a portion of the hydrogen supplied from the hydrogen storage container to the dispenser through the branch pipe while hydrogen charging of the vehicle hydrogen tank is in progress; A discharge valve that closes a hydrogen discharge pipe connected to the opening of the dispenser when hydrogen is filled into the vehicle's hydrogen tank; It includes a charging station controller that closes the charging valve and opens the discharge valve when the hydrogen charging of the vehicle hydrogen tank is completed, so that the hydrogen stored in the hydrogen buffer tank is supplied to the dispenser at the time when the hydrogen charging of the vehicle hydrogen tank is completed. A hydrogen charging system for a vehicle, wherein the branch pipe is branched from the hydrogen supply pipe at a location between the charging valve and the dispenser, and the hydrogen supplied to the dispenser passes through the opening of the dispenser and the hydrogen discharge pipe and is discharged into the atmosphere.
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3. In claim 1, A hydrogen charging system for a vehicle, characterized in that the charging station controller estimates and monitors the internal temperature of the vehicle hydrogen tank based on the measurement value of a temperature sensor that detects the internal temperature of the hydrogen buffer tank when hydrogen is charged to the vehicle hydrogen tank.
4. In claim 3, A hydrogen charging system for a vehicle, characterized in that the charging station controller closes the charging valve and opens the discharge valve when the temperature of the vehicle hydrogen tank rises and reaches a predetermined critical temperature.
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Description

Hydrogen refueling system for vehicles The present invention relates to a hydrogen refueling system for vehicles, and more specifically, to a hydrogen refueling system for vehicles that facilitates the separation of a refueling nozzle for a hydrogen refueling station and a receptacle for a vehicle hydrogen tank even when freezing occurs, and prevents the temperature of the vehicle hydrogen tank from rising excessively. A fuel cell vehicle is an automobile that uses a fuel cell, which generates electricity by reacting hydrogen with oxygen, as a power source. A fuel cell vehicle is equipped with a hydrogen tank for hydrogen storage and, as shown in FIG. 4, has a receptacle (2) that is coupled with a charging nozzle (1) of a hydrogen charging station when charging hydrogen into the hydrogen tank. When rapidly charging hydrogen at a charging station, the charging proceeds for several minutes at a temperature of tens of degrees below zero, and due to freezing occurring on the charging nozzle (1) and receptacle (2) at this time, a problem occurs in which the charging nozzle (1) is not separated from the receptacle (2) after the charging is completed. This freezing problem mainly occurs during seasons with high humidity. In addition, when rapidly charging hydrogen, the pressure of the hydrogen tank is charged up to several hundred bar, and at this time, the temperature of the hydrogen tank rises to a level of several tens of degrees above zero. However, due to factors such as chiller malfunctions at the charging station, hydrogen charging may proceed at high temperatures when supplied to the tank; in such cases, if the tank temperature rises excessively above the normal temperature during rapid charging, there is a risk of accidents. FIG. 1 is a diagram showing the configuration of a hydrogen refueling system for a vehicle according to an embodiment of the present invention. FIG. 2 is a diagram showing hydrogen flow during hydrogen refueling of a vehicle hydrogen tank using a hydrogen refueling system according to an embodiment of the present invention. FIG. 3 is a diagram showing hydrogen flow when hydrogen charging of a vehicle hydrogen tank is completed and when the temperature of the vehicle hydrogen tank rises excessively using a hydrogen charging system according to an embodiment of the present invention. FIG. 4 is a diagram showing the coupling state between the charging nozzle of a conventional hydrogen charging station and the receptacle of a fuel cell vehicle. Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. The details depicted in the accompanying drawings are schematic drawings intended to facilitate the explanation of embodiments of the present invention and may differ from the actual implemented form. Figure 1 attached is a diagram showing the configuration of a hydrogen charging system for a vehicle according to an embodiment of the present invention, Figure 2 is a diagram showing hydrogen flow during hydrogen charging of a vehicle hydrogen tank using a hydrogen charging system according to an embodiment of the present invention, and Figure 3 is a diagram showing hydrogen flow when hydrogen charging of a vehicle hydrogen tank is completed and when the temperature of the vehicle hydrogen tank rises excessively using a hydrogen charging system according to an embodiment of the present invention. The above hydrogen charging system is a charging system for a hydrogen charging station for charging hydrogen into a hydrogen tank (i.e., a vehicle hydrogen tank) mounted on a vehicle, and as shown in FIG. 1, it is configured to include a dispenser (120) of the hydrogen charging station, a charging valve (112), a hydrogen buffer tank (140), a discharge valve (152), etc. The dispenser (120) above is a part connected to a receptacle (210) for hydrogen charging of a vehicle hydrogen tank (200) and can be placed at the end of a hydrogen supply pipe (110) for a hydrogen charging station. The above hydrogen supply pipe (110) is positioned between the hydrogen storage container (100) and the dispenser (120) of the hydrogen charging station and can be connected to the hydrogen outlet of the hydrogen storage container (100) and the hydrogen inlet of the dispenser (120). In the above hydrogen supply pipe (110), a pressure sensor (114) for measuring the pressure of the supplied hydrogen and a first temperature sensor (116) for measuring the temperature may be installed, and a charging valve (112) capable of controlling the flow of hydrogen from the hydrogen storage container (100) of the hydrogen charging station to the dispenser (120) is installed. The charging valve (112) can be operated by a charging station controller (160) to open and close the hydrogen supply pipe (110), and by opening and closing the hydrogen supply pipe (110), the hydrogen flow of the hydrogen supply pipe (110) can be controlled. In addition, a branch pipe (118) connected to a hyd