KR20240016015A - System and method for hydrogen emission of fuel cell - Google Patents

Abstract

According to an embodiment disclosed in this document, a hydrogen discharge system for a fuel cell includes a purge valve for purging hydrogen on a hydrogen supply line passing through a fuel cell stack; A fan for discharging purged hydrogen; and a control unit that controls the operation of the purge valve based on the state of the vehicle equipped with the fuel cell stack and controls at least one of the direction and rotation speed of the fan based on the state of the vehicle.

Description

Hydrogen emission system and method for fuel cell {SYSTEM AND METHOD FOR HYDROGEN EMISSION OF FUEL CELL}

Embodiments disclosed in this document relate to a system and method for discharging hydrogen from a fuel cell.

A fuel cell system can generate electrical energy using a fuel cell stack. For example, if hydrogen is used as a fuel for a fuel cell stack, it can be an alternative to solving global environmental problems, so continuous research and development is being conducted on fuel cell systems. The fuel cell system consists of a fuel cell stack that generates electrical energy, a fuel supply device that supplies fuel (hydrogen) to the fuel cell stack, an air supply device that supplies oxygen from the air, an oxidizing agent necessary for electrochemical reactions, to the fuel cell stack, and fuel. It may include a thermal management system (TMS) that removes reaction heat from the cell stack to the outside of the system, controls the operating temperature of the fuel cell stack, and performs a water management function.

In a fuel cell system, electricity is generated by reacting hydrogen as a fuel with oxygen in the air in the fuel cell stack, and heat and water are discharged as reaction by-products. In this fuel cell system, as a crossover occurs due to the difference in gas concentration between the hydrogen electrode and the air electrode in the fuel cell stack, the hydrogen gas in the hydrogen electrode diffuses to the air electrode, lowering the hydrogen concentration in the hydrogen electrode, which causes the fuel cell stack to The cell voltage decreases. To this end, the fuel cell system discharges residual hydrogen through hydrogen purge to maintain the hydrogen concentration in the hydrogen electrode within a certain range.

Generally, hydrogen purge is performed to discharge the hydrogen present in the hydrogen supply line even before driving the vehicle. However, due to reasons such as the purged hydrogen not being properly discharged outside the fuel cell system, hydrogen is purged by a hydrogen leak detection sensor. There was a problem where the operation was terminated if it was determined that there was a leak.

According to an embodiment disclosed in this document, a hydrogen discharge system for a fuel cell includes a purge valve for purging hydrogen on a hydrogen supply line passing through a fuel cell stack; A fan for discharging purged hydrogen; and a control unit that controls the operation of the purge valve based on the state of the vehicle equipped with the fuel cell stack and controls at least one of the direction and rotation speed of the fan based on the state of the vehicle.

According to an embodiment, when the vehicle is in a state before starting, the control unit may control the direction of the fan to be toward the top of the purge valve and control the rotation speed of the fan to a first value.

According to an embodiment, the hydrogen discharge system of the fuel cell may further include a detection sensor that detects hydrogen outside the fuel cell stack.

According to an embodiment, if it is determined that hydrogen has leaked based on a detection signal received from the detection sensor, the control unit may control the direction of the fan to face the position of the detection sensor.

According to an embodiment, the control unit may control the rotation speed of the fan to be proportional to the distance between the detection sensor and the fan.

According to an embodiment, the control unit may control the rotation speed of the fan to the maximum rotation speed when the vehicle is in a starting sequence.

According to an embodiment, the control unit may control the rotation speed of the fan to a second value when the vehicle is running.

According to an embodiment, the controller may control the rotation speed of the fan to the maximum rotation speed when controlling the purge valve to be open.

According to an embodiment, the controller may control the purge valve to be opened when the vehicle is in a state of end of operation.

According to an embodiment, the controller may control the rotation speed of the fan to the maximum rotation speed and control the fan to rotate 360 degrees.

According to an embodiment, the hydrogen discharge system of the fuel cell may further include a tilting motor for controlling the direction of the fan by receiving a control signal from the control unit.

According to an embodiment, the fan may be located between the fuel cell stack and the purge valve.

According to embodiments disclosed in this document, a method for discharging hydrogen from a fuel cell includes obtaining the state of a vehicle equipped with a fuel cell stack; and controlling the operation of a purge valve based on the state of the vehicle, and controlling at least one of the direction and rotation speed of a fan for discharging hydrogen to be purged based on the state of the vehicle.

According to an embodiment, the step of controlling at least one of the direction and rotation speed of the fan based on the state of the vehicle includes controlling the direction of the fan to face the top of the purge valve when the state of the vehicle is before starting. and controlling the rotation speed of the fan to a first value; A detection sensor detecting hydrogen outside the fuel cell stack; If it is determined that hydrogen has leaked based on the detection signal received from the detection sensor, controlling the direction of the fan to face the position of the detection sensor; And it may further include controlling the rotation speed of the fan to be proportional to the distance between the detection sensor and the fan.

According to an embodiment, the step of controlling at least one of the direction and rotation speed of the fan based on the state of the vehicle includes controlling the rotation speed of the fan to the maximum rotation speed when the state of the vehicle is in the starting sequence. may further include.

According to an embodiment, controlling at least one of the direction and rotation speed of the fan based on the state of the vehicle includes: controlling the rotation speed of the fan to a second value when the vehicle is running; And when controlling the purge valve to open, the step of controlling the rotation speed of the fan to the maximum rotation speed may be further included.

According to an embodiment, controlling at least one of the direction and rotation speed of the fan based on the state of the vehicle includes controlling the purge valve to open when the state of the vehicle is end of operation; controlling the rotation speed of the fan to the maximum rotation speed; And it may further include controlling the fan to rotate 360 degrees.

The hydrogen discharge system of the fuel cell according to the embodiments disclosed in this document improves the safety of the fuel cell system by detecting purged hydrogen as a hydrogen leak and prevents a situation in which operation is terminated, and improves operation efficiency due to abnormal operation termination. This can be prevented from lowering.

The hydrogen discharge system of the fuel cell according to the embodiments disclosed in this document enables efficient control by controlling the rotation speed of the fan based on the status of the vehicle, purge status, etc.

In addition, various effects that can be directly or indirectly identified through this document may be provided.

1 is a block diagram of a hydrogen exhaust system for a fuel cell according to an embodiment disclosed in this document.
Figure 2 is a diagram showing the structure of a hydrogen discharge system for a fuel cell according to an embodiment disclosed in this document.
Figure 3 is a flowchart for explaining a method of discharging hydrogen from a fuel cell according to an embodiment disclosed in this document.
Figure 4 is a flowchart showing the operation process of the hydrogen discharge system of the fuel cell according to an embodiment disclosed in this document when the vehicle state is before starting.
Figure 5 is a flowchart showing the operation process of the hydrogen exhaust system of the fuel cell according to an embodiment disclosed in this document when the vehicle is in a starting sequence.
Figure 6 is a flowchart showing the operation process of the hydrogen discharge system of the fuel cell according to an embodiment disclosed in this document when the vehicle is in a running state.
Figure 7 is a flowchart showing the operation process of the hydrogen exhaust system of the fuel cell according to an embodiment disclosed in this document when the vehicle state is before starting.

Hereinafter, various embodiments of the present invention are described with reference to the accompanying drawings. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include various modifications, equivalents, and/or alternatives to the embodiments of the present invention.

In this document, the singular form of a noun corresponding to an item may include one or plural items, unless the relevant context clearly indicates otherwise. In this document: “A or B”, “at least one of A and B”, “at least one of A or B”, “A, B or C”, “at least one of A, B and C” and “A, Each of phrases such as “at least one of B, or C” may include any one of the items listed together in the corresponding phrase, or any possible combination thereof. Terms such as "first", "second", or "first" or "second" may be used simply to distinguish one component from another, and to refer to that component in other respects (e.g., importance or order) is not limited. One (e.g., first) component is said to be “coupled” or “connected” to another (e.g., second) component, with or without the terms “functionally” or “communicatively.” When mentioned, it means that any of the components can be connected to the other components directly (e.g. wired), wirelessly, or through a third component.

Each component (eg, module or program) described in this document may include singular or plural entities. According to various embodiments, one or more of the corresponding components or operations may be omitted, or one or more other components or operations may be added. Alternatively or additionally, multiple components (eg, modules or programs) may be integrated into a single component. In this case, the integrated component may perform one or more functions of each component of the plurality of components in the same or similar manner as those performed by the corresponding component of the plurality of components prior to the integration. . According to various embodiments, operations performed by a module, program, or other component may be executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations may be executed in a different order, omitted, or , or one or more other operations may be added.

As used in this document, the term "module", or "part" may include a unit implemented in hardware, software, or firmware, and may include terms such as logic, logic block, component, or circuit. Can be used interchangeably. A module may be an integrated part or a minimum unit of the parts or a part thereof that performs one or more functions. For example, according to one embodiment, the module may be implemented in the form of an application-specific integrated circuit (ASIC).

Various embodiments of this document may be implemented as software (e.g., a program or application) including one or more instructions stored in a storage medium (e.g., memory) that can be read by a machine. For example, the processor of the device may call at least one instruction among one or more instructions stored from a storage medium and execute it. This allows the device to be operated to perform at least one function according to the at least one instruction called. The one or more instructions may include code generated by a compiler or code that can be executed by an interpreter. A storage medium that can be read by a device may be provided in the form of a non-transitory storage medium. Here, 'non-transitory' simply means that the storage medium is a tangible device and does not contain signals (e.g. electromagnetic waves). This term refers to cases where data is stored semi-permanently in the storage medium. There is no distinction between temporary storage cases.

1 is a block diagram of a hydrogen exhaust system for a fuel cell according to an embodiment disclosed in this document.

Referring to FIG. 1, the hydrogen discharge system 1 of the fuel cell may include a purge valve 100, a fan 200, and a control unit 300.

According to the embodiment, the purge valve 100 may purge hydrogen on the hydrogen supply line passing through the fuel cell stack. The purge valve 100 may change its state based on the operation control of the control unit 300, which will be described later. For example, the purge valve 100 may have two states, open or closed, and the open and closed states may be changed based on the operation control of the controller 300. In the open state, the purge valve 100 can purge hydrogen whose concentration has been reduced by impurities (eg, nitrogen) generated during the continuous chemical reaction of the fuel cell.

According to an embodiment, the fan 200 may discharge purged hydrogen to the outside of the fuel cell. The fan 200 may include a plurality of blades (not shown) to generate wind by rotating. The fan 200 generates wind in the direction where the hydrogen is located, scattering the hydrogen or discharging it to the outside of the fuel cell. For example, the fuel cell system may be configured within a housing, and in this case, the fan 200 may discharge purged hydrogen to the outside of the housing.

According to the embodiment, the control unit 300 is a hardware device such as a processor, Micro Processor Unit (MPU), Micro Controller Unit (MCU), Central Processing Unit (CPU), Electronic Controller Unit (ECU), or a processor. It may be a program implemented by . The control unit 300 is connected to each component of the fuel cell hydrogen discharge system 1 and can perform overall functions related to the management and operation of the fuel cell stack. As an example, the control unit 300 may be a fuel cell control unit (FCU) that controls overall functions of the fuel cell system.

According to the embodiment, the control unit 300 is wired or wirelessly connected to each component constituting the hydrogen discharge system 1 of the fuel cell, such as the purge valve 100, the fan 200, and the detection sensor 400 to be described later. You can communicate by, for example, you can communicate based on CAN communication.

According to an embodiment, the control unit 300 may control the operation of the purge valve 100 based on the state of a vehicle equipped with the fuel cell stack 10. At this time, the control unit 300 controlling the operation of the purge valve 100 may include controlling the state of the purge valve 100. For example, the control unit 300 may control the purge valve 100 to be open or closed, and when the purge valve 100 is controlled to be open (or open), purge of hydrogen is performed. can do.

According to an embodiment, the control unit 300 may control at least one of the direction and rotation speed of the fan 200 based on the state of the vehicle. The direction of the fan 200 may include the wind direction for discharging hydrogen. Additionally, the direction of the fan 200 may have a range of 360 degrees horizontally or vertically, for example, based on the hydrogen supply line. The rotation speed of the fan 200 may include the rotation speed of the blades of the fan 200 and, for example, may have a value between 0 rpm and a preset maximum rotation speed (rpm). The maximum rotation speed (rpm) may be set based on the power provided to the fan 200, the capacity of the fuel cell, the size of the fuel cell housing, the temperature of the fuel cell, etc.

According to embodiments, the state of the vehicle may have various states depending on the type of vehicle, whether the vehicle is started, whether it is running, etc. For example, the state of the vehicle may include states before starting, during the starting sequence, during operation, and completion of operation. The control unit 300 may control the operations of the purge valve 100 and the fan 200 differently for each vehicle state based on the state of the vehicle.

According to an embodiment, the control unit 300 may receive a signal corresponding to the status of the vehicle from a vehicle controller, for example, a vehicle control unit (VCU). At this time, the control unit 300 may determine the status of the vehicle based on a signal received from the vehicle controller.

According to an embodiment, the hydrogen discharge system 100 of the fuel cell may include a detection sensor 400. The detection sensor 400 can detect hydrogen outside the fuel cell stack 10. Here, the outside of the fuel cell stack 10 may include a space between the fuel cell stack 10 and the housing including the fuel cell system. The detection sensor 400 may generate a detection signal based on hydrogen concentration. The detection signal may be, for example, a digital signal. As an example, the detection sensor 400 may generate a detection signal to have a value of 1 if the detected hydrogen concentration exceeds a certain level and a value of 0 if the detected hydrogen concentration is below a certain level.

The detection sensor 400 may transmit a detection signal to the control unit 300. At this time, the control unit 300 may determine whether hydrogen is leaking based on the detection signal received from the detection sensor 400. For example, the control unit 300 may determine that hydrogen has leaked when the detection signal received from the detection sensor 400 has a value of 1. There may be a plurality of detection sensors 400 and may be placed in various locations outside the fuel cell stack 10 .

According to an embodiment, the hydrogen discharge system 100 of the fuel cell may include a tilting motor 500. The tilting motor 500 may receive a control signal from the control unit 300. The tilting motor 500 may receive a control signal including the control direction of the fan 200 from the control unit 300 and control the direction of the fan 200 based on the control signal. For example, when the detection sensor 400 detects a hydrogen leak, the control unit 300 collects the location information of the detection sensor 400 in order to control the direction of the fan 200 to correspond to the position of the detection sensor 400. The included control signal may be transmitted to the tilting motor 500, and the tilting motor 500 may receive the control signal and tilt the fan 200 so that the direction of the fan 200 is toward the detection sensor 400.

Figure 2 is a diagram showing the structure of a hydrogen discharge system for a fuel cell according to an embodiment disclosed in this document.

Referring to FIG. 2, the hydrogen discharge system 1 of the fuel cell can discharge hydrogen purged during the purge process to the outside through control of the fan 200.

According to the embodiment, when the vehicle is in a state before starting, the control unit 300 controls the direction of the fan 200 to be toward the top of the purge valve 100 and sets the rotation speed of the fan 200 to the first value. You can control it. Here, the state of the vehicle before starting may include a state in which a preset time has elapsed with the power of the fuel cell turned off. At this time, the hydrogen discharge system 1 of the fuel cell may purge hydrogen by opening the purge valve 100 to prevent hydrogen leakage during the process of starting the vehicle. At the moment hydrogen is purged from the purge valve 100, the hydrogen is purged toward the top of the purge valve 100, so the control unit 300 can control the direction of the fan 200 to point toward the top of the purge valve 100. there is.

The first value may be set as a ratio value based on the maximum rotation speed, or may be set as an rpm value, for example, 80% of the maximum rotation speed of the fan 200.

According to the embodiment, when it is determined that hydrogen has leaked based on the detection signal received from the detection sensor 400, the control unit 300 controls the direction of the fan 200 to face the position of the detection sensor 400. You can. To this end, the detection sensor 400 may include a location sensor (not shown) and may transmit a signal including location information to the control unit 300. At this time, since the fact that the detection sensor 400 detects hydrogen means that hydrogen exists at a certain level or more at the corresponding location, the control unit 300 controls the fan 200 to point toward the location to direct the hydrogen to the outside of the fuel cell. It can be discharged as .

According to an embodiment, the control unit 300 may control the rotation speed of the fan 200 to be proportional to the distance between the detection sensor 400 and the fan 200. As the detection sensor 400 is further away from the fan 200, the hydrogen discharge effect due to rotation of the fan 200 will decrease, so the control unit 300 is configured to be proportional to the distance between the detection sensor 400 and the fan 200. The rotation speed of the fan 200 can be controlled to ensure that hydrogen is smoothly discharged.

For example, in FIG. 2, when detection sensor 1 (400_1) detects a hydrogen leak, the control unit 300 may control the fan 200 to point towards detection sensor 1 (400_1). Likewise, when detection sensor 2 (400_2) detects a hydrogen leak, the control unit 300 may control the fan 200 to point towards detection sensor 2 (400_2). At this time, since the distance between detection sensor 1 (400_1) and the fan 200 is closer than the distance between detection sensor 2 (400_2) and the fan 200, the control unit 300 connects the fan 200 to detection sensor 1 ( When controlled to face 400_1, the rotation speed of the fan 200 can be controlled to be smaller than the rotation speed of the fan 200 when controlled to face detection sensor 2 (400_2).

According to an embodiment, the control unit 300 may control the rotation speed of the fan 200 to the maximum rotation speed when the vehicle is in a starting sequence. Here, the state of the vehicle being in the starting sequence may mean the state from the moment power is supplied to turn on the vehicle but before driving begins. In this case, in order to prevent a situation in which the vehicle is turned off because hydrogen is judged to have leaked by a leak detection sensor, etc., the hydrogen discharge system 1 of the fuel cell controls the fan 200 at the maximum rotation speed. Before starting operation, hydrogen can be discharged as much as possible outside the fuel cell.

According to an embodiment, the control unit 300 may control the rotation speed of the fan 200 to a second value when the vehicle is running. Here, the state of the vehicle being in operation may include the state from the moment the start-up sequence is completed and the vehicle starts to drive before the vehicle ends. The second value may be set as a ratio value based on the maximum rotation speed, or may be set as an rpm value, for example, may be set to a value of 50% of the maximum rotation speed of the fan 200. The hydrogen discharge system 1 of the fuel cell can control the rotation speed to the second value without turning off the fan 200 in preparation for an emergency hydrogen leak, even when the hydrogen is not purged.

According to an embodiment, the control unit 300 may control the rotation speed of the fan 200 to the maximum rotation speed when controlling the purge valve 100 to open. Since the moment the purge valve 100 is opened, the largest amount of hydrogen will be purged, the control unit 300 can increase the hydrogen discharge effect by controlling the rotation speed of the fan 200 to the maximum rotation speed. When the control unit 300 controls the purge valve to be turned off, the power consumption efficiency of the fan 200 can be increased by controlling the rotation speed of the fan 200 back to the second value.

According to the embodiment, the control unit 300 may control the purge valve 100 to be opened when the vehicle is in a state of end of operation. Here, the state of the vehicle being in operation may include a state within a preset time after turning off the engine of the vehicle. At this time, unreacted hydrogen may remain inside the fuel cell, and in order to discharge the unreacted hydrogen, the controller 300 may control the purge valve 100 to open to purge the hydrogen.

At this time, the control unit 300 can control the rotation speed of the fan 200 to the maximum rotation speed and control the fan 200 to rotate 360 degrees. The control unit 300 can control the fan 200 to rotate 360 degrees and face all directions inside the fuel cell to prevent leaked hydrogen from remaining. For example, the control unit 300 controls the fan 200 to move pitch/roll/yaw based on the hydrogen supply line in order to discharge hydrogen in all directions of the fuel cell. You can.

According to the embodiment, the fan 200 may be located between the fuel cell stack 10 and the purge valve 100. Generally, hydrogen is purged from the purge valve 100 toward the opposite direction of the fuel cell stack 10, and the closer the distance between the purge valve 100 and the fan 200, the more hydrogen is discharged by the fan 200. Since the effect of will be large, the hydrogen discharge system 1 of the fuel cell can increase hydrogen discharge efficiency by placing the fan 200 between the fuel cell stack 10 and the purge valve 100.

In FIG. 2, the tilting motor 500 is shown as being separate from the fan 200, but it may also be formed as an integrated unit. Additionally, the number and location of the detection sensors 400 shown in FIG. 2 are not limited.

Figure 3 is a flowchart for explaining a method of discharging hydrogen from a fuel cell according to an embodiment disclosed in this document.

Referring to FIG. 3, the method of discharging hydrogen from a fuel cell includes acquiring the state of a vehicle equipped with a fuel cell stack (S100), controlling the operation of the purge valve based on the state of the vehicle, and controlling the operation of the purge valve based on the state of the vehicle. It may include a step (S200) of controlling at least one of the direction and rotation speed of the fan for discharging the purged hydrogen.

In step S100, the control unit 300 may obtain the status of a vehicle equipped with a fuel cell stack.

In step S200, the control unit 300 controls the operation of the purge valve 100 based on the state of the vehicle, and at least one of the direction and rotation speed of the fan 200 for discharging hydrogen to be purged based on the state of the vehicle. You can control one. The control unit 300 may control the purge valve 100 and the fan 200 differently depending on the state of the vehicle.

Figure 4 is a flowchart showing the operation process of the hydrogen discharge system of the fuel cell according to an embodiment disclosed in this document when the vehicle state is before starting.

Referring to FIG. 4, the method of discharging hydrogen from a fuel cell can confirm the control process of the fan 200 of the control unit 300 when the vehicle is in a state before starting.

In step S310, the control unit 300 may check whether the vehicle state is before starting. The hydrogen exhaust system 1 of the fuel cell can proceed to step S320 when the vehicle state is before starting (S310 - Yes). The hydrogen exhaust system 1 of the fuel cell can repeatedly perform step S310 if the vehicle state is not before starting (S310 - No).

In step S320, the control unit 300 may control the direction of the fan 200 to face the top of the purge valve 100 and control the rotation speed of the fan 200 to a first value.

In step S330, the detection sensor 400 may detect hydrogen outside the fuel cell stack.

In step S340, the control unit 300 may determine whether hydrogen has leaked based on the detection signal received from the detection sensor 400. If the hydrogen discharge system 1 of the fuel cell determines that hydrogen has leaked (S340 - Yes), it can proceed to step S350. If it is determined that hydrogen has not leaked (S340 - No), the hydrogen discharge system 1 of the fuel cell may return to step S330.

In step S350, the control unit 300 may control the direction of the fan 200 to face the position of the detection sensor 400.

In step S360, the control unit 300 may control the rotation speed of the fan 200 to be proportional to the distance between the detection sensor 400 and the fan 200.

Figure 5 is a flowchart showing the operation process of the hydrogen exhaust system of the fuel cell according to an embodiment disclosed in this document when the vehicle is in a starting sequence.

Referring to FIG. 5, the method of discharging hydrogen from a fuel cell can confirm the control process of the fan 200 of the control unit 300 when the vehicle is in the starting sequence.

In step S410, the control unit 300 may check whether the vehicle state is in the starting sequence. The hydrogen exhaust system 1 of the fuel cell can proceed to step S420 when the vehicle state is in the starting sequence (S410 - Yes). The hydrogen exhaust system 1 of the fuel cell may repeatedly perform step S410 when the vehicle state is not in the starting sequence (S410 - No).

In step S420, the control unit 300 may control the rotation speed of the fan 200 to the maximum rotation speed.

Figure 6 is a flowchart showing the operation process of the hydrogen discharge system of the fuel cell according to an embodiment disclosed in this document when the vehicle is in a running state.

Referring to FIG. 6, the hydrogen discharge method of the fuel cell can confirm the control process of the purge valve 100 and the fan 200 of the control unit 300 when the vehicle is running.

In step S510, the control unit 300 can check whether the vehicle is running. The hydrogen exhaust system 1 of the fuel cell can proceed to step S520 when the vehicle status is running (S510 - Yes). The hydrogen exhaust system 1 of the fuel cell can repeatedly perform step S510 when the vehicle state is not running (S510 - No).

In step S520, the controller 300 may control the rotation speed of the fan 200 to a second value.

In step S530, the controller 300 may determine whether to control the purge valve 100 to open. The hydrogen discharge system 1 of the fuel cell may proceed to step S540 when the control unit 300 controls the purge valve 100 to open (S530 - Yes). The hydrogen discharge system 1 of the fuel cell may return to step S520 when the controller 300 controls the purge valve 100 to turn off (S530 - No).

In step S540, the control unit 300 may control the rotation speed of the fan 200 to the maximum rotation speed.

Figure 7 is a flowchart showing the operation process of the hydrogen exhaust system of the fuel cell according to an embodiment disclosed in this document when the vehicle state is before starting.

Referring to FIG. 7, the hydrogen discharge method of the fuel cell can confirm the control process of the purge valve 100 and the fan 200 of the control unit 300 when the vehicle state is at the end of operation.

In step S610, the control unit 300 may check whether the vehicle status is end of operation. The hydrogen discharge system 1 of the fuel cell can proceed to step S620 when the vehicle status is end of operation (S610 - Yes). The hydrogen exhaust system 1 of the fuel cell can repeatedly perform step S610 when the vehicle status is not the end of operation (S610 - No).

In step S620, the controller 300 may control the purge valve 100 to open.

In step S630, the control unit 300 may control the rotation speed of the fan 200 to the maximum rotation speed.

In step S640, the controller 300 may control the fan 200 to rotate 360 degrees.

In the above, just because all the components constituting the embodiments disclosed in this document are described as being combined or operated in combination, the embodiments disclosed in this document are not necessarily limited to these embodiments. That is, as long as it is within the scope of the purpose of the embodiments disclosed in this document, all of the components may be operated by selectively combining one or more of them.

In addition, terms such as “include,” “comprise,” or “have,” as used above, mean that the corresponding component may be contained, unless specifically stated to the contrary, and thus exclude other components. It should be interpreted as being able to include other components. All terms, including technical or scientific terms, have the same meaning as generally understood by a person of ordinary skill in the technical field to which the embodiments disclosed in this document belong, unless otherwise defined. Commonly used terms, such as terms defined in dictionaries, should be interpreted as consistent with the contextual meaning of the relevant technology, and should not be interpreted in an idealized or overly formal sense unless explicitly defined in this document.

The above description is merely an illustrative explanation of the technical idea disclosed in this document, and those skilled in the art in the technical field to which the embodiments disclosed in this document belong will understand without departing from the essential characteristics of the embodiments disclosed in this document. Various modifications and variations will be possible. Accordingly, the embodiments disclosed in this document are not intended to limit the technical idea of the embodiments disclosed in this document, but rather to explain them, and the scope of the technical idea disclosed in this document is not limited by these embodiments. The scope of protection of the technical ideas disclosed in this document shall be interpreted in accordance with the claims below, and all technical ideas within the equivalent scope shall be interpreted as being included in the scope of rights of this document.

1: Hydrogen discharge system of fuel cell
100: purge valve
200: fan
300: control unit
400: detection sensor
400_1, 400_2: Detection sensor
500: Tilting motor

Claims (17)

A purge valve that purges hydrogen on the hydrogen supply line via the fuel cell stack;
A fan for discharging purged hydrogen; and
Hydrogen discharge from a fuel cell including a control unit that controls the operation of the purge valve based on the state of the vehicle equipped with the fuel cell stack and controls at least one of the direction and rotation speed of the fan based on the state of the vehicle. system. According to paragraph 1,
The control unit controls the direction of the fan to be toward the top of the purge valve when the vehicle is in a state before starting and controls the rotation speed of the fan to a first value. According to paragraph 2,
A hydrogen discharge system for a fuel cell further comprising a detection sensor that detects hydrogen outside the fuel cell stack. According to paragraph 3,
The control unit,
A hydrogen discharge system for a fuel cell that controls the direction of the fan to face the location of the detection sensor when it is determined that hydrogen has leaked based on the detection signal received from the detection sensor. According to paragraph 4,
The control unit,
A hydrogen discharge system for a fuel cell that controls the rotation speed of the fan to be proportional to the distance between the detection sensor and the fan. According to paragraph 1,
The control unit controls the rotation speed of the fan to the maximum rotation speed when the vehicle is in a starting sequence. In paragraph 1,
The control unit controls the rotation speed of the fan to a second value when the vehicle is running. In clause 7,
A hydrogen discharge system for a fuel cell wherein the control unit controls the rotation speed of the fan to the maximum rotation speed when controlling the purge valve to open. According to paragraph 1,
The control unit controls the purge valve to be opened when the vehicle is in a state of end of operation. According to clause 9,
The control unit controls the rotation speed of the fan to the maximum rotation speed and controls the fan to rotate 360 degrees. According to paragraph 1,
A hydrogen discharge system for a fuel cell further comprising a tilting motor for receiving a control signal from the control unit and controlling the direction of the fan. According to paragraph 1,
The fan is a hydrogen exhaust system for a fuel cell located between the fuel cell stack and the purge valve. Obtaining the status of a vehicle equipped with a fuel cell stack; and
Controlling the operation of a purge valve based on the state of the vehicle, and controlling at least one of the direction and rotation speed of a fan for discharging purged hydrogen based on the state of the vehicle. method. According to clause 13,
The step of controlling at least one of the direction and rotation speed of the fan based on the state of the vehicle,
When the state of the vehicle is before starting, controlling the direction of the fan to face the top of the purge valve and controlling the rotation speed of the fan to a first value;
A detection sensor detecting hydrogen outside the fuel cell stack;
If it is determined that hydrogen has leaked based on the detection signal received from the detection sensor, controlling the direction of the fan to face the position of the detection sensor; and
A method of discharging hydrogen from a fuel cell further comprising controlling the rotation speed of the fan to be proportional to the distance between the detection sensor and the fan. According to clause 13,
The step of controlling at least one of the direction and rotation speed of the fan based on the state of the vehicle,
A method of discharging hydrogen from a fuel cell further comprising controlling the rotation speed of the fan to the maximum rotation speed when the vehicle is in a starting sequence. According to clause 13,
The step of controlling at least one of the direction and rotation speed of the fan based on the state of the vehicle,
When the vehicle is running, controlling the rotation speed of the fan to a second value; and
A method of discharging hydrogen from a fuel cell further comprising controlling the rotation speed of the fan to the maximum rotation speed when controlling the purge valve to open. According to clause 13,
The step of controlling at least one of the direction and rotation speed of the fan based on the state of the vehicle,
controlling the purge valve to open when the vehicle is in a state of end of operation;
controlling the rotation speed of the fan to the maximum rotation speed; and
A method of discharging hydrogen from a fuel cell further comprising controlling the fan to rotate 360 degrees.

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