KR102518693B1 - The apparatus for gas discharging of fuelcell system having high pressure vessel and the control method for the same - Google Patents

Abstract

The present invention relates to a gas exhaust device for exhausting high-pressure gas from a high-pressure container in a fuel cell system including a high-pressure container and a method for controlling the same. extended exhaust vents; an exhaust line that can be fastened to the exhaust port and for discharging gas inside the high-pressure container; an on-off valve provided on the exhaust line; and a thermostat provided on the exhaust line adjacent to the valve, wherein a change in the thermostat is interlocked with whether the on/off valve is opened or closed, and the fuel controls the flow of the gas in the exhaust line. The invention relates to a gas exhaust device for a battery system and a control method thereof.

Description

The apparatus for gas discharging of fuel cell system having high pressure vessel and the control method for the same}

The present invention relates to a gas exhaust device for exhausting high-pressure gas from a high-pressure container that may be included in a fuel cell system to the outside, and more particularly, a valve for exhausting using a thermostat or a temperature sensor of the high-pressure container. The present invention relates to a gas exhaust device and a control method for preventing damage to a high-pressure container including a liner and a surrounding system due to a sudden temperature drop inside the high-pressure container by opening or closing a gas exhaust device.

In general, a fuel cell system includes a fuel cell stack that generates electrical energy, a fuel supply system that supplies fuel (hydrogen) to the fuel cell stack, and an air supply that supplies oxygen in the air, which is an oxidant required for an electrochemical reaction, to the fuel cell stack. system, and a heat and water management system that controls the operating temperature of the fuel cell stack.

High-pressure compressed hydrogen of about 700 bar is stored in the hydrogen tank provided in the fuel supply system, that is, the hydrogen supply system, and the stored compressed hydrogen is turned on / off by a high-pressure regulator installed at the inlet of the hydrogen tank. After being discharged to the high-pressure line according to the pressure, it is reduced in pressure through the start valve and the hydrogen supply valve and supplied to the fuel cell stack.

At this time, high-pressure gas is used as fuel (hydrogen), so a gas storage container is required to store and discharge the gas as needed. In particular, since gas has a low storage density in a container, it is efficient to store it at high pressure, but it has the disadvantage of being exposed to the risk of explosion due to high pressure. In particular, since alternative fuel gas vehicles have a limited mounting space for the storage container, securing safety while maintaining the storage pressure at a high pressure is the core of the technology.

Therefore, in the case of a composite container among these fuel gas storage containers, the outer shell must be reinforced with a fiber-reinforced composite material having high specific strength and specific stiffness in order to withstand the high internal pressure of hydrogen gas, and a liner to maintain gas tightness is inserted inside. . In detail, two hemispherical liners are joined at both ends to form one storage container.

In addition, storage containers for gas, particularly hydrogen, are classified according to the material of the liner, and a container with a metal liner such as aluminum is classified as type 3, and a container with high-density polymer inserted is classified as type 4. Type 3 is relatively stable, but is expensive and has poor fatigue resistance. Type 4 containers are relatively inexpensive and have excellent fatigue resistance, but have stability problems such as hydrogen leakage and poor permeation resistance.

In particular, in the case of a type 4 container formed by wrapping a polymer liner with carbon fiber, there is a problem in that the high-pressure container may be damaged because the physical properties of the liner or fiber are destroyed in a cryogenic or high-temperature environment.

Republic of Korea Patent Publication No. 10-2006-0074722 (2017. 11. 22) Republic of Korea Patent Publication No. 10-2014-0083729 (2014. 07. 04)

When servicing a vehicle equipped with a fuel cell system, in particular, when checking a high-pressure container or a high-pressure container valve, all high-pressure gas stored inside the high-pressure container, preferably hydrogen, must be exhausted to the outside for safety. There are times when In this case, when the gas compressed at high pressure is rapidly exhausted to the outside, a state similar to that of adiabatic expansion of the gas inside the high-pressure container may be placed.

The temperature of the gas that adiabatically expands may drop rapidly due to the Joule-Thomson effect, and accordingly, the temperature of the high-pressure container and/or the passage through which the gas is exhausted from the high-pressure container may also drop rapidly. If this low temperature condition continues, if the temperature drops below the limit low temperature that can be endured in the liner, the high-pressure container, and the passage around the high-pressure container, breakage or damage may occur to the liner, the high-pressure container, and the passage around the high-pressure container. . In detail, the resin layer supporting the liner and the high-pressure container, and the 'O-ring' made of rubber material that maintains airtightness at each part of the flow path are damaged, which is fatal to the entire fuel cell system including the high-pressure container. can cause problems.

Therefore, in the present invention, while quickly exhausting the high-pressure gas from the inside of the high-pressure container to the outside using the thermostat of the gas exhaust device and/or the temperature sensor of the high-pressure container, the surrounding system including the high-pressure container due to rapid temperature change Provided is a gas exhaust device that can be provided so as not to be damaged and a control method thereof.

As an embodiment, the present invention for achieving the above object is a fuel cell system including a high-pressure vessel and an exhaust port extending from one end of the high-pressure vessel, which can be fastened to the exhaust port and discharges gas inside the high-pressure vessel. exhaust line for; an on-off valve provided on the exhaust line; and a thermostat provided on the exhaust line, wherein a change in the thermostat is interlocked with whether the on/off valve is opened or closed, and a gas exhaust device for a fuel cell system that controls the flow of the gas in the exhaust line. provides

In addition, a gas exhaust device for a fuel cell system is provided in which the on/off valve and the thermostat are sequentially provided on the exhaust line in a direction extending from the high-pressure vessel along the exhaust line.

In addition, it further includes a timer for controlling the operation of the on-off valve, wherein the timer opens the on-off valve again only after a preset time elapses when the on-off valve is closed by the thermostat. Provided is a gas exhaust device for a fuel cell system that controls the operation of the on/off valve so as to be possible.

In addition, the exhaust line includes an inlet extending in one direction; and an outlet formed at a point extending from an end of the inlet to a curved direction from the one direction.

In addition, a gas exhaust device for a fuel cell system in which the diameter of the outlet part is greater than the diameter of the inlet part is provided.

In addition, the on-off valve and the thermostat provide a gas exhaust device for a fuel cell system formed on the inlet.

In addition, the inlet portion includes an exhaust port fastening port provided at one end of the inlet portion disposed adjacent to the high-pressure vessel and capable of being fastened with the exhaust port, and the exhaust port fastening port extends in a direction curved from the one direction of the inlet port. A gas exhaust device for a fuel cell system formed at one extended point is provided.

In addition, the gas exhaust device further includes a manual valve, and the manual valve provides a gas exhaust device for a fuel cell system that may be provided between the exhaust port fitting and the on/off valve.

In addition, the high-pressure container further includes a high-pressure container valve for controlling the inflow and outflow of the gas in the high-pressure container, and the gas exhaust device further includes a power supply unit for supplying power to the on-off valve and the thermostat. And, the power unit provides a gas exhaust device for a fuel cell system that can be fastened to the high-pressure container valve.

In addition, a control method for discharging gas inside the high-pressure container from the high-pressure container through the gas exhaust device using a high-pressure container including a high-pressure container valve and a gas exhaust device including an on/off valve, a thermostat, and a power supply unit. (a) fastening the gas exhaust device to an exhaust port extending from the high-pressure container; and (b) closing an exhaust line included in the gas exhaust device by the on/off valve, wherein a change in the thermostat is interlocked with whether the on/off valve is opened or closed, so that the exhaust line Provided is a method for controlling a gas exhaust device for a fuel cell system that regulates the flow of gas.

In addition, in step (b), when the temperature of the exhaust line falls below a preset temperature, the on/off valve is set to be closed by the thermostat.

In addition, after the on-off valve is closed, (c) when the temperature of the exhaust line rises above the preset temperature, the step of opening the on-off valve again by the thermostat; further comprising, Provided is a gas exhaust device control method for a fuel cell system in which steps (a) to (c) are repeatedly performed until the pressure of the high-pressure container is reduced to atmospheric pressure.

In addition, in the control method for discharging the gas inside the high-pressure container from the high-pressure container through the gas exhaust device, using a high-pressure container including a temperature sensor and a high-pressure container valve and a gas exhaust device including a control unit, ( 1) engaging the gas exhaust device with the high-pressure container valve; and (2) the controller engaging the temperature sensor and the high-pressure container valve, respectively, so that the controller closes the high-pressure container valve. Provided is a control method for a gas exhaust device for a fuel cell system that controls whether a container valve is opened or closed.

In addition, in step (2), when the temperature of the high-pressure container measured by the temperature sensor decreases to a preset temperature or less, the control unit closes the high-pressure container valve. to provide.

In addition, after the high-pressure vessel valve is closed, (3) when the temperature of the high-pressure vessel rises above the preset temperature, the step of opening the on-off valve again by the control unit; Provided is a method for controlling a gas exhaust device for a fuel cell system in which steps (1) to (3) are repeatedly performed until the pressure of the high-pressure vessel is reduced to atmospheric pressure.

Through the above problem solving means, the present invention provides the following effects.

According to the present invention, since supercooling of the high-pressure container and surrounding parts can be prevented while high-pressure gas is exhausted from the high-pressure container, unnecessary damage to the high-pressure container and surrounding parts can be prevented.

In addition, according to the present invention, since the process of exhausting gas from the high-pressure container can be automated, mistakes or malfunctions that may occur during manual operation can be prevented, and the safety of the exhaust cycle can be secured.

In addition, according to the present invention, even if an unexpected accident occurs while the gas is being exhausted from the high-pressure container, it is exhausted by an automated system, so that human injury that could occur in the past can be prevented.

In addition, according to the present invention, since the need for manpower can be reduced, maintenance costs can be reduced and economic efficiency can be improved.

In addition, according to the present invention, since the high-pressure gas can be exhausted from the high-pressure container as quickly as possible without applying a thermal load to the high-pressure container and surrounding systems, the exhausting time can be shortened.

1 is a diagram showing a connection relationship of a gas exhaust device according to an embodiment of the present invention.
2 is a diagram showing a connection relationship of a gas exhaust device according to another embodiment of the present invention.
3 is a diagram showing a connection relationship of a gas exhaust device according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited to the following examples. This embodiment is provided to more completely explain the present invention to those skilled in the art.

In addition, terms such as "...unit", "...unit", and "...module" described in the specification mean a unit that processes at least one function or operation, which is hardware, software, or hardware and It can be implemented as a combination of software.

A fuel cell system installed in a vehicle is largely composed of a fuel cell stack generating electrical energy, a fuel supply device supplying fuel (hydrogen) to the fuel cell stack, and supplying oxygen in the air, an oxidizing agent required for an electrochemical reaction, to the fuel cell stack. It consists of an air supply device, a cooling system that removes reaction heat from the fuel cell stack to the outside of the system and controls the operating temperature of the fuel cell stack.

In the fuel supply system of the fuel cell system, a high-pressure container loaded with fuel may exist as a fuel storage tank. In the high-pressure vessel, hydrogen is preferably loaded and used as fuel, and high-pressure hydrogen gas of about 700 bar can be stored inside the vessel.

Accordingly, a high-pressure state due to fuel or hydrogen may be maintained inside the high-pressure container, and the gas may pressurize the high-pressure container. In particular, if a leak or breakage occurs at one point of the high-pressure container, the internal high pressure is concentrated at one point, causing damage to the high-pressure container and subsequent explosion. It is a very important element in a vehicle that can be equipped with a battery system.

In this regard, in order to stably store high-pressure fuel, preferably hydrogen, in a high-pressure container, a liner, specifically a plastic liner and a nozzle at one end of the liner for fuel injection or discharge A high-pressure vessel may be formed including the boss portion. Furthermore, it is a recent trend to use a type 4 high-pressure vessel in which a composite material layer is formed by winding the outside of the structure where the liner and the boss part are combined with a carbon fiber composite material.

Looking in detail at the type 4 high-pressure vessel, a polymer liner may be provided therein, and a high-pressure vessel may be formed by winding an outer circumferential surface of the polymer liner with carbon fiber. Polymer liners and carbon fibers are light and durable, suitable for use in high-pressure containers for storing high-pressure gas. However, in a vehicle equipped with a fuel cell system, the temperature of the high-pressure vessel and the system around the high-pressure vessel must be adjusted within a certain range.

In addition, when an abnormality occurs in the high-pressure container and / or the high-pressure container valve fastened to the high-pressure container, and furthermore, in the flow path provided around the high-pressure container, the high-pressure gas inside the high-pressure container for inspection and / or repair of the high-pressure container and surrounding systems There may be occasions when it is necessary to vent to the outside. However, as described above, when the high-pressure gas inside the high-pressure container is exhausted to the outside, a phenomenon similar to adiabatic expansion of the gas occurs inside the high-pressure container, and the Joule-Thomson effect causes The temperature of the gas, the high-pressure container, and components of the fuel cell system provided around the high-pressure container may drop rapidly. When the temperature around the high-pressure container, including the high-pressure container, drops rapidly, the risk of damage, destruction, and rupture as described above may increase rapidly.

Therefore, in the present invention, referring to FIGS. 1 to 3, a gas exhaust device capable of quickly exhausting high-pressure gas inside the high-pressure container to the outside while preventing damage to the high-pressure container and its surrounding system and a control method thereof be described in detail.

1 is a view showing a gas exhaust device 200 according to an embodiment of the present invention. In FIG. 1 , a part of a fuel cell system including a high-pressure vessel 500 and a gas exhaust device 200 are shown. According to FIG. 1, a part of the fuel cell system is shown in the upper left corner. In detail, according to the present invention, the high-pressure vessel valve 510 is formed by extending from the high-pressure vessel 500 and can control the inflow or outflow of gas into the high-pressure vessel 500, and the high-pressure vessel valve 510 An exhaust port 100 that can be extended and communicated may be provided.

That is, the exhaust port 100 in the present invention may be formed to extend from one end of the high-pressure vessel 500. Preferably, the high-pressure vessel valve 510 may use a type of valve that can be generally employed in the high-pressure vessel 500, such as a solenoid-type valve, and the exhaust port 100 is fastened to the exhaust port of the gas exhaust device 200. Since the sphere 210 is formed to correspond to its shape, it can serve as a connector between the gas exhaust device 200 and the high-pressure vessel 500 system. That is, the exhaust port 100 extending from the high-pressure vessel 500 and the exhaust port fastening port 210 of the gas exhaust device 200 are fastened to each other, so that the high-pressure vessel 500 system and the gas exhaust device 200 can be connected. there is.

Also, referring to FIG. 1 , a gas exhaust device 200 according to an embodiment of the present invention may include an exhaust line. The exhaust line is a line having a flow path formed therein, and may provide a flow path through which high-pressure gas exhausted from the high-pressure vessel 500 can pass. Preferably, the exhaust line is fastened and/or communicated with the exhaust port 100 extending from the high-pressure vessel 500 so that the gas discharged from the high-pressure vessel 500 through the exhaust port 100 flows into the exhaust line. there is. An exhaust port fastening hole 210 may be formed on one side of the exhaust line so as to be fastened with the exhaust port 100 of the high-pressure container 500 system.

Meanwhile, according to one embodiment of the invention, the exhaust line includes an inlet 220 extending in one direction and an outlet 230 bent in a direction different from one direction at the end of the inlet 220. can be formed, including That is, the outlet 230 may be formed to extend in a curved direction from the extension direction of the inlet 220 . Preferably, the outlet 230 may be formed to extend in a direction perpendicular to the extension direction of the inlet 220 . Accordingly, at the 'point where the inlet 220 is switched to the outlet 230' inside the exhaust line, the gas may flow along a curved, preferably vertically bent flow path.

Furthermore, preferably, in the case of the above-described exhaust port fastening hole 210, it may be formed at one end in the opposite direction to the end where the inlet 220 and the outlet 230 meet. In addition, the exhaust port 210 may also be formed by extending in a curved direction from the direction in which the inlet 220 extends, and preferably perpendicular to the direction in which the inlet 220 extends. It may be formed extending in a direction. More preferably, of the direction perpendicular to the direction in which the inlet 220 extends, the exhaust port 210 may be formed by extending in a direction opposite to gravity.

Therefore, according to a preferred embodiment of the present invention, when the gas discharged from the high-pressure container 500 is exhausted from the high-pressure container 500 system via the high-pressure container valve 510 and the exhaust port 100, that is, exhaust from the vehicle. Once the gas is introduced into the gas exhaust device 200 through the exhaust port fitting 210, the gas can be finally exhausted to the outside through the inlet 220 and the outlet 230.

Furthermore, according to one embodiment of the present invention, the diameter of the passage of the outlet 230 may be formed larger than the diameter of the passage of the inlet 220 . Therefore, when the gas passing through the inlet 220 flows into the outlet 230, the volume expands and a phenomenon such as adiabatic expansion may occur, so that the gas energy of the gas rising while passing through the inlet 220 can be alleviated. In detail, the pressure or temperature of the gas raised while passing through the inlet 220 may decrease while passing through the outlet 230 .

Meanwhile, referring to FIG. 1 again, the opposite end 240 of the outlet 230 connected to the inlet 220 may communicate with the outside. That is, one end of the outlet 230 is connected to the inlet 220, and the other end may be exposed to the atmosphere. Therefore, after passing through the inlet 220 , the gas flowing into the outlet 230 through the curved passage may be exhausted to the outside through the outlet 230 . Preferably, the end 240 communicating with the outside at the outlet 230 may also be formed to be curved. More preferably, the end 240 communicating with the outside of the outlet 230 may be formed by being curved in a 'b' shape. Accordingly, in the curved portion of the end 240 of the outlet 230, as the speed decreases before the gas is exhausted to the outside, the pressure of the gas exhausted to the outside can be reduced, and the stability of the exhausted gas is reduced. can be obtained.

In addition, according to FIG. 1 , in the present invention, a support 250 capable of supporting the gas exhaust device 200 may be provided at a point where the inlet 220 and the outlet 230 meet. In detail, the support 250 may be provided on one point along the direction in which the outlet 230 is formed. Preferably, the support 250 may be provided at one point in the direction of gravity among the directions in which the outlet 230 extends.

Therefore, according to a preferred embodiment of the present invention, the inlet 220 may be formed to extend in a direction perpendicular to gravity, and the outlet 230 may be formed to extend in a direction parallel to gravity. More preferably, the inlet 220 may have a length of about 10 m, and the outlet 230 may have a length or height of about 3 m.

Looking at an embodiment of the present invention with reference to FIG. 1 again, an on/off valve 300 and a thermostat 400 may be provided in the exhaust line of the present invention. The on/off valve 300 is a valve that opens or closes a flow path provided according to conditions, and the thermostat 400 is a configuration that can physically behave by changing physical properties according to temperature, and may be provided with a bimetal material. there is. Since both the on/off valve 300 and the thermostat 400 are common configurations widely known to those skilled in the art, detailed descriptions thereof may be omitted.

In detail, according to an embodiment of the present invention, the on/off valve 300 and the thermostat 400 may be provided on the inlet 220 of the exhaust line. Furthermore, the thermostat 400 may be provided adjacent to the on/off valve 300 . In one embodiment of the present invention, being provided adjacently means that the temperature and / or temperature of the gas passing through the on-off valve 300 can be maintained without changing until the temperature reaches the thermostat 400, It can mean an appropriate distance.

According to one embodiment of the present invention, the on/off valve 300 and the thermostat 400 may be formed on one side close to the high-pressure container 500 even on the inlet 220 of the exhaust line. That is, the on/off valve 300 and the thermostat 400 may be disposed adjacent to the exhaust port fitting 210 . More preferably, referring to FIG. 1 , the high-pressure container 500, the on/off valve 300, and the thermostat 400 are sequentially connected to the exhaust line based on the direction extending from the high-pressure container 500 along the exhaust line. may be provided on the That is, the on/off valve 300 may be provided closer to the high-pressure vessel 500 than the thermostat 400, and the thermostat 400 may be provided closer to the outlet 230 than the on/off valve 300. there is. Therefore, the gas introduced from the high-pressure container 500 through the outlet 230 to the exhaust line may pass through the on/off valve 300 and come into contact with the thermostat 400 . Accordingly, since the flow of gas from the high-pressure container 500 to the thermostat 400 and whether or not it reaches the thermostat 400 is changed by the opening or closing of the on-off valve 300, whether the on-off valve 300 is open or not the thermostat 400 ) can be interlocked with each other.

In the present invention, the thermostat 400 can be controlled to block or supply current applied to the on/off valve 300 while changing according to temperature. In detail, when current is applied to the on/off valve 300, the valve can be opened, so when the thermostat 400 cuts off the current, the on/off valve 300 is closed, the exhaust line is closed, and the thermostat When the 400 is connected to supply current, the on/off valve 300 is opened and the exhaust line may be opened.

Furthermore, according to one embodiment, in the present invention, a controller 800 and/or a power supply unit (power supply unit) 700 that can be connected to the on/off valve 300 and the thermostat 400 may be provided. The control unit 800 may control the opening or closing of the on/off valve 300 and may supply or block current applied to the on/off valve 300 together with the thermostat 400 . In addition, the power supply unit 700 may be connected to the on/off valve 300, the thermostat 400, and/or the high pressure vessel valve 510, and may supply operating power to drive various valves and to the thermostat 400. .

In particular, according to one embodiment, since the power supply unit 700 of the gas exhaust device 200 can be connected to the high-pressure container valve 510 in the present invention, whether the vehicle equipped with the high-pressure container 500 is 'On/Off' Regardless of this, power for opening or closing the high-pressure container valve 510 may be supplied from the power supply unit 700 of the gas exhaust device 200 to the high-pressure container valve 510. That is, according to one embodiment, since the gas exhaust device 200 of the present invention can apply and supply separate power to the high-pressure container valve 510 regardless of whether the vehicle is started, the high-pressure container (500) High-pressure gas can be exhausted from the inside.

Also, according to one embodiment, in the present invention, a manual valve 260 may be provided on the exhaust line in order to manually control the driving of the gas exhaust device 200 . Preferably, a manual valve 260 may be provided near the exhaust fitting 210 at the inlet 220 on the exhaust line, and a ball valve type manual valve 260 may be provided. More preferably, the manual valve 260 may be provided at a point in the exhaust line between the exhaust port fitting 210 and the on/off valve 300 . Accordingly, when the gas exhaust device 200 is operated by a user, by opening or closing the manual valve 260, the introduction of high-pressure gas into the gas exhaust device 200 may be permitted or prevented.

That is, in one embodiment of the present invention, the manual valve 260 is provided so that the user can first manually control whether or not the gas exhaust device 200 is operated. Furthermore, according to the present invention, by using the thermostat 400 to open or close the on/off valve 300 even when the manual valve 260 is open, the high-pressure container 500 and the high-pressure container 500 are included. A double safety device may be provided to prevent unexpected damage to the high-pressure container 500 and the system around the high-pressure container 500 even when the temperature of the surroundings decreases below a certain value.

Meanwhile, FIG. 2 is a diagram showing another embodiment of the present invention, which further includes a timer 600 in the embodiment of FIG. 1 . In detail, the timer 600 may be provided between the thermostat 400 and the on/off valve 300, preferably to control the operation of the on/off valve 300 together with the thermostat 400. may be provided.

When the current applied to the on/off valve 300 by the thermostat 400 is blocked, the timer 600 measures a predetermined time and controls the current to be re-applied to the on/off valve 300 after a predetermined period of time has elapsed. can do. That is, the timer 600 in this embodiment is configured to preset a minimum time required for current to flow again to the on-off valve, and the current flowing to the on-off valve 300 is blocked by the thermostat 400. After a certain time has elapsed again, the on/off valve 300 and the power supply unit 700 are connected to each other by the timer 600, so that the on/off valve 300 can be opened again. In other words, even if the thermostat 400 operates to open the on/off valve 300 again due to a temperature change on the on/off valve side, if the time set by the timer 600 has not elapsed, the on/off valve 300 ) will not open again.

To this end, the timer 600 may include a configuration capable of regulating the electrical connection between the power supply unit 700 and the on/off valve 300, and may be configured as a unit that directly controls the opening and closing of the on/off valve 300. can Therefore, the thermostat 400 and the timer 600 are components that can control the opening and closing of the on-off valve 300 in common. When the on/off valve is closed according to the operation of the thermostat 400, the timer 600 controls the opening and closing of the on/off valve according to the passage of time considering the temperature change of the high-pressure container 500. configured to be able to

Furthermore, the degree (or speed) of temperature change at a point in the exhaust line where the on/off valve 300 and/or the thermostat 400 are provided may be different from the degree (or speed) of temperature change of the high-pressure vessel 500. . Therefore, even when the temperature decreases and the on/off valve 300 is closed, and the temperature in the on/off valve 300 and/or the thermostat 400 recovers to a certain temperature level or higher, the high-pressure container 500 The temperature of may be a state below the reference temperature. Therefore, in order to prepare for such a situation, the timer 600 may delay the opening of the on/off valve 300 by adding a predetermined delay to the on/off valve 300 . The delay time applied from the timer 600, that is, the operating time of the timer 600, is set using map data previously set through experiments, etc. Users/workers can arbitrarily adjust separately.

3 is a view showing a gas exhaust device 200 according to another embodiment of the present invention. In the embodiment of FIG. 3 , the temperature sensor 520 provided in the high-pressure container 500 may be used instead of the thermostat 400 . Furthermore, the high-pressure container valve 510 provided in the high-pressure container 500 may be used instead of the on-off valve 300 . According to the embodiment of FIG. 3 , even if the thermostat 400 or the on/off valve 300 is not necessarily provided in the gas exhaust device 200, the high-pressure gas can be exhausted from the inside of the high-pressure container 500 to the outside. . In detail, the control unit 800 and/or the power supply unit 700 of the gas exhaust device 200 may be coupled to the temperature sensor 520 and/or the high pressure vessel valve 510 of the high pressure vessel 500. Therefore, as described above, power can be applied from the gas exhaust device 200 to the temperature sensor 520 of the high-pressure container 500 and/or the high-pressure container valve 510 regardless of whether the vehicle is started, and the applied Opening or closing of the high-pressure vessel valve 510 may be controlled through control of an electrical signal.

However, according to the embodiment of FIG. 3 , a connector or adapter may be provided at a point where the high-pressure container valve 510 and the hydrogen supply flow path are connected. That is, a connector capable of fastening the high pressure container valve 510 and the hydrogen supply passage to each other is provided on a point of the passage extending from the high pressure container 500 and connected to the stack, respectively. It can be. Furthermore, a shape corresponding to the connector of the high pressure container valve 510 is formed on the exhaust port fitting 210 of the gas exhaust device 200, so that the high pressure container valve 510 and the exhaust port fitting 210 can be fastened. That is, the connector formed in the hydrogen supply passage and the connector formed in the gas exhaust device 200 may be formed in the same shape, and may be coupled to the high-pressure container valve 510 if necessary. Preferably, when the fuel cell system operates normally and hydrogen is supplied from the high-pressure container 500 to the stack, the high-pressure container valve 510 and the hydrogen supply passage may be engaged. In addition, when exhausting high-pressure gas from the high-pressure container 500, the hydrogen supply valve may be directly coupled to the gas exhaust device 200, preferably the exhaust port 210 of the gas exhaust device 200.

Hereinafter, the control method of the gas exhaust device 200 in which the gas in the high-pressure container 500 is quickly and safely exhausted to the outside by the gas exhaust device 200 shown in FIGS. 1 to 3 will be described in detail. .

First, according to various embodiments of the present invention, the gas exhaust device 200 may be coupled to the exhaust port 100 or the high-pressure container valve 510 of the fuel cell system. In detail, according to an embodiment provided with the thermostat 400, the on/off valve 300, and the exhaust port 210, the exhaust port 100 of the gas exhaust device 200 is the exhaust port of the fuel cell system ( 100) can be concluded. Also, according to another embodiment, the exhaust port fitting 210 of the gas exhaust device 200 may be fastened to the high-pressure vessel valve 510.

Furthermore, the on/off valve 300 of the gas exhaust device 200 or the high-pressure container valve 510 of the high-pressure container 500 is opened by the control unit 800 and/or the power supply unit 700 of the gas exhaust device 200. Alternatively, closure can be controlled. Specifically, when the temperature sensed by the thermostat 400 decreases below a certain value or when the temperature sensed by the temperature sensor 520 of the high-pressure container 500 decreases below a certain value, the on/off valve 300 Alternatively, the high-pressure vessel valve 510 may close the exhaust line. In this case, the reference temperature value of the thermostat 400 and the reference temperature value of the temperature sensor 520 may be set differently in consideration of the fact that the installation positions are different. In addition, when both the thermostat 400 and the temperature sensor 520 are provided, when the temperature of at least one component is reduced below each reference temperature value, the corresponding valve is closed to close the high-pressure container 500. The stability of the system can be ensured. That is, the operation of the on-off valve 300 and/or the high-pressure vessel valve 510 is controlled by the change in the thermostat 400 and/or the temperature measured by the temperature sensor 520 of the high-pressure vessel 500. Accordingly, it is possible to determine whether each valve is opened or closed. Therefore, in the present invention, whether the on/off valve 300 and/or the high pressure vessel valve 510 are operated (opened or closed) may be interlocked according to the change of the thermostat 400 and/or the measured value of the temperature sensor 520. can

Furthermore, according to one embodiment of the present invention, when the temperature of the exhaust line rises above a preset temperature or the temperature measured by the temperature sensor 520 of the high-pressure vessel 500 rises above a preset temperature, the controller The on/off valve 300 and/or the high pressure vessel valve 510 may be opened again by the operation 800 and/or the power supply unit 700. The temperature of the high-pressure container 500 may naturally rise to the atmospheric temperature over time through heat exchange with the surrounding atmosphere, and the degree and rate of temperature rise of the high-pressure container 500 may vary depending on the temperature of the surrounding atmosphere. can

Considering the difference in the position where the thermostat 400 and the temperature sensor 520 are provided, in the case of a temperature drop, the reference temperature of the thermostat 400 (lower reference temperature_thermostat) and the temperature sensor of the high-pressure container 500 ( 520), the reference temperature (lower limit reference temperature_temperature sensor) could be set differently, even in the case of a temperature rise, the preset temperature (upper limit reference temperature_thermostat) of the thermostat 400 and the high-pressure vessel (500 ) The preset temperature (upper limit reference temperature_temperature sensor) of the temperature sensor 520 may be set to different values. Furthermore, the upper limit reference temperature of each component and the lower limit reference temperature of each component can be arbitrarily set and manipulated by the user, including some margins in consideration of the pressure and temperature conditions of the high-pressure vessel 500 and surroundings.

In addition, the operation of the gas exhaust device 200 according to an embodiment of the present invention may be repeatedly performed until the pressure inside the high-pressure container 500 is reduced to a level equal to or similar to atmospheric pressure. Since the internal pressure of the high-pressure vessel 500 is periodically measured by the pressure sensor of the high-pressure vessel 500 to secure the stability of the fuel cell system including the high-pressure vessel 500, the high-pressure vessel 500 uses the measured value. The degree of decompression inside can be judged.

In summary, the key idea of the present invention is that the change of the thermostat of the gas exhaust device or the temperature sensor of the high-pressure container and whether the on-off valve provided in the gas exhaust device is opened or closed are linked to each other, so that the external air from the high-pressure container is transmitted through the exhaust line. It is characterized in that the flow of the exhausted gas can be controlled, and thus the high-pressure gas inside the high-pressure container can be quickly exhausted to the outside while preventing overcooling of the surrounding system including the high-pressure container. In particular, in the present invention, the gas exhaust device is provided with a manual valve so that the gas exhaust device can be opened or closed by the user's manual operation, and the values measured by the thermostat and/or the temperature sensor of the high-pressure container are provided. It should be noted that the feature of the present invention is that it is possible to improve the structural stability and operational stability of the gas exhaust device by controlling the operation of the gas exhaust device by interlocking the opening and closing of the on/off valve of the gas exhaust device.

In addition, although the embodiments of the present invention have been described and described, those skilled in the art can add, change, delete, or add components within the scope not departing from the spirit of the present invention described in the claims. It will be possible to implement the present invention by various modifications and changes by addition, etc., and this will also be said to be included within the scope of the present invention.

Furthermore, in describing the embodiments of the present invention, if it is determined that a detailed description of a known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description is omitted. In addition, the terms used above are terms defined in consideration of functions in the embodiment of the present invention, which may vary according to the intention or custom of a user or operator. Therefore, the definition should be made based on the contents throughout this specification. Therefore, the above detailed description of the invention is not intended to limit the present invention to the disclosed embodiments, and the appended claims should be construed to include other embodiments as well.

100: exhaust vent
200: gas exhaust device
210: exhaust fixture
220: inlet
230: outlet
240: end of outlet
250: support
260: manual valve
300: on-off valve
400: thermostat
500: high-pressure vessel
510: high pressure vessel valve
520: high-pressure vessel temperature sensor
600: timer
700: power unit (power supply)
800: control unit

Claims (15)

A fuel cell system comprising a high-pressure vessel and an exhaust port extending from one end of the high-pressure vessel,
an exhaust line that can be fastened to the exhaust port and for discharging gas inside the high-pressure vessel;
an on-off valve provided on the exhaust line; and
a thermostat provided on the exhaust line;
Including, the change of the thermostat is interlocked with whether the on-off valve is opened or closed, configured to control the flow of the gas in the exhaust line,
A gas exhaust device for a fuel cell system configured to close the on/off valve by the thermostat when the temperature of the exhaust line decreases below a preset temperature. The gas exhaust device for a fuel cell system according to claim 1, wherein the on/off valve and the thermostat are sequentially provided on the exhaust line in a direction extending from the high-pressure container along the exhaust line. According to claim 1, A timer for controlling the operation of the on-off valve;
The fuel cell further includes, wherein the timer controls the operation of the on/off valve so that the on/off valve can be opened again only after a preset time elapses when the on/off valve is closed by the thermostat. Gas exhaust for the system. According to claim 1, wherein the exhaust line is an inlet extending in one direction; and
an outlet formed at a point extending from an end of the inlet to a curved direction from the one direction;
A gas exhaust device for a fuel cell system comprising a. The gas exhaust device for a fuel cell system according to claim 4, wherein a diameter of the outlet is greater than a diameter of the inlet. The gas exhaust device for a fuel cell system according to claim 4, wherein the on/off valve and the thermostat are formed on the inlet. The method of claim 4, wherein the inlet portion is provided at one end of the inlet portion disposed adjacent to the high-pressure container, and includes an exhaust port fastening port capable of being fastened with the exhaust port;
The gas exhaust device for a fuel cell system includes a, wherein the exhaust port fastening hole is formed at a point extending in a direction curved from the one direction of the inlet. The method of claim 7, wherein the gas exhaust device includes a manual valve;
Including more,
The manual valve is a gas exhaust device for a fuel cell system that may be provided between the exhaust port fitting and the on/off valve. The high-pressure vessel according to claim 1, wherein the high-pressure vessel comprises: a high-pressure vessel valve for controlling the inflow and outflow of the gas of the high-pressure vessel;
Including more,
The gas exhaust device includes a power supply unit for supplying power to the on/off valve and the thermostat;
Including more,
The power supply unit is a gas exhaust device for a fuel cell system that can be fastened to the high-pressure vessel valve. A control method for discharging gas inside the high-pressure container from the high-pressure container through the gas exhaust device using a high-pressure container including a high-pressure container valve and a gas exhaust device including an on/off valve, a thermostat, and a power supply unit ,
(a) fastening the gas exhaust device to an exhaust port extending from the high-pressure vessel; and
(b) closing an exhaust line included in the gas exhaust device by the on/off valve;
Including, the change of the thermostat and whether the on-off valve is opened or closed are interlocked to control the flow of the gas in the exhaust line,
In the step (b), the on/off valve is set to be closed by the thermostat when the temperature of the exhaust line decreases to a preset temperature or less. delete The method of claim 10, after the on-off valve is closed,
(c) opening the on/off valve again by the thermostat when the temperature of the exhaust line rises above the preset temperature;
The control method for a gas exhaust device for a fuel cell system further includes, wherein the steps (a) to (c) are repeatedly performed until the pressure of the high-pressure container is reduced to an atmospheric pressure level. A control method for discharging gas inside the high-pressure container from the high-pressure container through the gas exhaust device, using a high-pressure container including a temperature sensor and a high-pressure container valve, and a gas exhaust device including a controller,
(1) engaging the gas exhaust device with the high-pressure container valve; and
(2) closing the high-pressure container valve by the controller by engaging the temperature sensor and the high-pressure container valve;
including,
The control unit controls whether the high-pressure container valve is opened or closed based on the value measured by the temperature sensor,
In the step (2), when the temperature of the high-pressure container measured by the temperature sensor decreases to a preset temperature or less, the control unit closes the high-pressure container valve. delete The method of claim 13, after the high pressure vessel valve is closed,
(3) re-opening the high-pressure container valve by the control unit when the temperature of the high-pressure container rises above the preset temperature;
The control method for a gas exhaust device for a fuel cell system further includes, wherein steps (1) to (3) are repeatedly performed until the pressure of the high-pressure vessel is reduced to atmospheric pressure.

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